Author: Julie Hillis

Choosing the Right Plastic for Your Next Project Part 2

Choosing the Right Plastic for Your Next Project Part 2

With such a significant number of plastic options out there, finding the best one for your undertaking can appear like an incomprehensible errand. More than 85,000 commercial choices for plastic materials are recorded in materials databases. If you’re brave enough to go through the rundown, the result of picking the correct material can enhance the form, fit, and capacity of your parts.


PP (Polypropylene)

Advantages: PP is a modestly priced resin alternative with higher impact protection in a few grades; propylene homopolymer can be weak in chilly temperatures, with copolymers more impervious to impact. PP is wear-safe, adaptable and can have high elasticity. It’s likewise impervious to acids and bases.

Applications: integral hinges or living hinges, fans, snap-over tops, medical pipette tubing.

Contemplations: Thick areas of the part can void and show bubbles. Shrink and twist may likewise happen in PP parts. In the event that the part has living hinges that require higher firmness, K-Resin is a decent option.

PPSU (Polyphenylsulfone)

Advantages: PPSU is a high-temperature, dimensionally stable material with high sturdiness and heat protection. It has protection from radiation cleansing and in addition alkalis and weak acids.

Applications: Medical instruments, sterilization trays, car wires, high temp water fittings, sockets and connectors.

Contemplations: PPSU is delicate to thick areas to some parts, which could bring about voids, air pockets or sink. Natural solvents and hydrocarbons can likewise assault PPSU material.

PEEK (Polyether Ether Ketone)

Advantages: PEEK is a high-temperature, superior resin utilized as a part of medical, aviation and car enterprises for an assortment of reasons including heat protection and fire resistance; magnificent quality and dimensional dependability; and great chemical protection.

Applications: Bearings, cylinder parts and pumps; cable protection; good with ultra-high vacuum applications.

Contemplations: PEEK is an elite material, and, subsequently, is extremely costly.

PEI (Polyetherimide)

Advantages: PEI, or Ultem, like PEEK, it’s utilized as a part of medical, aviation and car businesses for its heat protection and fire resistance; fantastic quality and dimensional steadiness; and great chemical protection.

Applications: Medical and chemical instrumentation, flatware, HVAC , electrical and lighting.

Contemplations: Ultem is likewise extremely costly, however not as expensive as PEEK. Take a gander at PPSU as a conceivable option.

If you happen to be looking for a plastic injection molding company to get started with, look no further! Quality Mold Shop has the capacity to build and repair most any mold size. Give us a call today and see how we can help you.

Common Injection Molded Plastics

Common Injection Molded Plastics

The job of a plastic injection molder includes helping the customer select the best accessible plastic material for their application. The choice and accessibility of different polymers has changed in the course of recent years. Today, it can be overwhelming to figure out what the best plastic material is for your project. This slideshow goes over some of the most common types of plastics.

Choosing the Right Plastic for Your Next Project Part 1

Choosing the Right Plastic for Your Next Project Part 1

More than 85,000 commercial alternatives for plastic materials are recorded in materials databases, and, inside those, 45 polymer families can be ordered into two classes: thermosets and thermoplastics.

Narrowing down that broad rundown of materials can appear like an assignment that’s too big, so we’ve arranged this rundown in two parts that framework the advantages and uses of some of our most used materials. By picking the correct material, you can enhance the shape, fit, and capacity of your parts.


ABS (Acrylonitrile Butadiene Styrene)

Advantages: ABS is a hard, impact safe plastic that is broadly utilized over a wide range of ventures. It has low shrinkage and high dimensional stability, and it has great protection from acids and bases. ABS is a decent decision for handheld devices. It’s likewise moderately cheap.

Applications: aesthetic parts, handheld gadgets, casings, and moldings for electrical tools, remote controls, PCs, phone parts.

Contemplations: ABS-formed parts will indicate knit lines and can have sink and voids in thick regions. Diminishment of sink can be had by changing to an ABS/PC-mixed material. ABS additionally bonds well to PC parts.


Advantages: ABS/PC consolidates the quality and heat protection of polycarbonate with the adaptability of ABS. ABS/PC likewise gives enhanced handling amid injection molding, expanded durability and dimensional stability, higher heat protection than ABS, and better low temperature impact protection than PC.

Applications: These mixes are ordinarily utilized as a part of the car, electronic, and broadcast communications businesses among others applications.

Contemplations: ABS/PC materials intermittently can limit thick molding concerns found in ABS or PC materials when molded alone. It is often utilized when improved mechanical properties are required when utilizing ABS or when a lower cost PC is required.

PC (Polycarbonate)

Advantages: PC is solid and to a great degree impact safe with low shrinkage and great dimensional stability. It’s a transparent plastic that is accessible in optically clear grades. PC has great heat protection and acknowledges high aesthetic coatings as well.

Applications: Lenses, indoor and open air lighting, phone cases, electrical parts, therapeutic gadgets, impenetrable glass.

Contemplations: There can be sensitivities in thick areas of parts that may cause voids, air pockets and sink, and PC parts have poor chemical protection. An ABS/PC blend is a good alternative for opaque parts with these issues, and Acrylic (outlined below) is another option for parts with thick geometries.

PA or PPA (Aliphatic Polyamides)

Advantages: There are many sorts of PPAs, or nylons (4, 6/6, 6, 6/10, 6/12, 12, and so forth.), each with its own particular favorable circumstances. For the most part, nylon parts give top strength and high-temperature quality, particularly when strengthened, and are chemical solvent safe, aside from exceptionally strong acids and bases.

Applications: thin-walled projects, brushes, spools, gears and bearings, screws, pump parts, under-hood segments, cameras.

Contemplations: Nylon can be prone to warping due to non-linear shrink, so remember that while picking a particular sort of nylon. In the event that your part will be presented to dampness, you ought to consider maintaining a strategic distance from nylon as it is a hygroscopic material that will retain dampness, causing dimensional and possibly structure issues.

PMMA (Polymethyl Methacrylate)

Advantages: PMMA, otherwise known as acrylic, has great optical properties, a polished look and is scratch safe. Acrylic likewise has low shrinkage and has less sink in geometries with thin and think segments.

Applications: light pipes, lenses, light shades, optical filaments, signs.

Contemplations: Acrylic can be weak and along these lines more defenseless to pressure breaking. PC is a decent option, if necessary. Draft is constantly required in acrylic parts because of its weakness, and normally double the draft of different materials. Acrylic likewise has poor compound protection.

We don’t want to overwhelm you all at once with too many plastics to think about. Be on the look out for part 2 of this article for more plastics to consider for your next part. And if you have any questions always feel free to call Quality Mold Shop.

Various Injection Molding Equipment

Various Injection Molding Equipment

While most people think of painting, sculpting and carpentry as art forms, few people will look at mass produced plastic goods in the same way. After all, plastic goods are often cheap, and most people only consider something art if it’s exquisite. But while plastic injection molding isn’t necessarily an art form, it’s definitely a process that requires professionals with enough knowledge and skill to get the job done properly. Injection molding isn’t as simple as pouring molten plastics into molds. Many variables can affect the outcome, and mistakes often lead to molding defects.

But qualified professionals who know about using an injection mold isn’t the only thing that you’ll need to mold quality parts. No amount of background in injection molding can compensate for a bad mold. Once you take a moment to consider the process of making a plastic injection mold, you’ll soon start to see the art in plastic injection molding.


Why Quality Injection Molds Are A Valuable Investment

Imagine trying to produce plastic parts without an injection mold? Even if it were possible, the process wouldn’t be very versatile or efficient. This is the case with plastic injection molding alternatives, like 3D printing, where parts can be produced without molding them in a specially-made mold.

The problem with a process like 3D printing, however, is that it’s remarkably slow compared to plastic injection molding, so even though 3D printing is useful in its own right, it’s not a practical process for mass producing plastic goods. At best, 3D printing is good for prototyping goods before you have an injection mold made, or for making a custom-made product that won’t be mass produced. So although some people hope that 3D printing will one day replace plastic injection molding altogether, this isn’t something that will happen in the near future.

With that that in mind, it’s safe to say that plastic injection molds will remain as valuable to the manufacturing industry as tractors are to the modern agricultural industry. Injection molds are what distinguishes the modern manufacturing industry to make large scale production possible.

And when you think about it, your plastic injection molds are what will define your plastic parts. The part will take whatever shape the mold allows, and if your mold is flawless, your part will be too. However, just like a flawless mold can produce flawless parts, a mold with a critical defect will only be able to mold parts with defects.

Why Cheap Molds Aren’t A Good Option

All too often, plastic injection molders will buy the cheapest mold they can find, only to find that it’s defective upon arrival. This is already bad enough in itself, but to make the situation even worse, the defective molds are often imported from overseas, and so sending them back for repairs can take months. When you consider the fact that those molds should be working to earn money for your business, buying a defective mold from abroad can cost tens and thousands of dollars.

But to make a bad situation even worse, mold owners don’t usually send defective molds back to the cheap plastic injection mold manufacturer for fixing. After all, what hope is there to get a mold working by sending it back to a manufacturer that couldn’t produce a working mold in the first place?

Because of this, plastic injection mold owners often look to American injection mold suppliers to fix imported molds that were defective upon arrival. And make no mistake, buying a cheap mold and getting it fixed isn’t more cost effective than getting a proper mold to begin with. On the contrary, this usually ends up being more expensive than buying a quality American-made injection mold from the start.

Injection Molding Equipment: Maintenance vs Repairs

Getting your injection molding equipment made by a mold maker that has a high quality standard is definitely the first step in effortlessly producing quality plastic parts on a consistent basis. But to keep everything running smoothly, mold maintenance will be necessary, and (in some cases) repairs too.

A mold maintenance schedule will help prolong the lifetime of your molds. And considering how expensive plastic injection molds tend to be, this is a worthwhile investment. The extra life and service you can get from a mold that’s well-maintained by far makes up for the cost of maintenance.

Don’t be too quick to believe financial advisors who suggest that cutting on maintenance can save money. All too often, financial advisors are trying to make immediate savings for a business by neglecting to consider what’s more sustainable in the long-run. This is especially true when the advisors are pressured into setting up reports that show where they were able to save a business money.

As injection mold professionals, we can confidently say that well-maintained molds last longer, perform more reliably and save large amounts in expensive repairs.

Knoxville Injection Mold Suppliers

Whether you want a brand new mold expertly designed and made from scratch, or repair an existing mold, Quality Mold Shop can help you. When it comes to plastic injection molds, there’s little we can’t do. From reverse-engineering a mold to make an exact duplicate, to fixing a defective mold you bought from another supplier. Our team will also gladly service any mold bought from any supplier, including imported molds.

Injection Molding Equipment

Injection Molding Equipment

In the present assembling condition, plastics are being utilized to make everything from car body parts to human body parts. Every application requires an uncommon assembling process that can mold the part with all of its details. This article gives a short outline of the diverse sorts of equipment, specifically machines and their advantages and applications.


Blow Molding – appropriate for empty items, similar to bottles

The procedure takes after the advances found in glass blowing. A parison (warmed plastic mass, normally a tube) is swelled via air. The air pushes the plastic against the form to frame the coveted shape. Once cooled, the plastic is launched out.

The blow molding process is intended to make high volume, one-piece empty items. On the off chance that you have to make heaps of jugs, this is the procedure for you. Blow molding makes exceptionally uniform, thin walled holders.

Compression Molding – appropriate for bigger articles like car parts

The name of this molding strategy says everything. A warmed plastic material is put in a warmed form and is then compressed into shape. The plastic can be in mass however frequently comes in sheets. The warming procedure, called curing, guarantees the final part will keep up its strength. As with other molding techniques, once the part has been formed, it is then expelled from the mold. On the off chance that sheeting plastic material is utilized, the material is first trimmed in the shape before the part is evacuated.

Extrusion Molding– appropriate for long empty framed applications like tubing, pipes and straws

While different types of molding utilize extrusion to get the plastic resin into a mold, this procedure expels the liquefied plastic specifically into a die. The die shape, not a mold, decides the state of the last item. The expelled “tubing” is cooled and can be cut or moved for shipment.

Injection Molding – appropriate for fantastic, high-volume part producing

Injection Molding is by a long shot the most flexible of all injection molding methods. The presses used in this process vary in size and are rated based on pressure or tonnage. Larger machines can injection mold car parts. Smaller machines can produce very precise plastic parts for surgical applications. In addition, there are many types of plastic resins and additives that can be used in the injection molding process, increasing its flexibility for designers and engineers.


Each sort of molding has its qualities and shortcomings. Designers and specialists need to comprehend these distinctions and the creation alternatives accessible between all the injection molding equipment. The molding company who consults on a specific project should be able to provide additional insights into the applications and materials that are best suited to an individual project. If you’re in the market to get your part made, Quality Mold Shop is ready to help. Give us a call today.

Terms to Know Regarding Plastic Injection Molding

Terms to Know Regarding Plastic Injection Molding

Plastic injection molding has a dialect all it’s own and with such huge numbers of interesting terms it can be hard to take in the dialect. Here is a list of the best terms to know while talking about plastic injection molding, form parts, materials, and issues. We trust you discover this list to be a helpful asset.

Contracting A Plastic Injection Molding Company?

Contracting A Plastic Injection Molding Company?

Plastic injection molding is a successful approach to mass deliver an item or generation component for your business. Regardless of whether you require a couple of hundred, or many thousands, of a solitary thing, the correct injection molding organization can get it going.

Before you select a custom injection molder for your undertaking, plan out some questions to make sure they are a good fit. To guarantee you have the correct partner, we have a few inquiries that will start you off on the correct path.

7 Areas To Explore When Evaluating A Potential Plastic Injection Molder. Get some information about:


Key Fit

First and foremost, would you say you are hoping to form a long haul relationship? Provided that this is true, search for a decent strategic and social fit with potential injection molder. Set aside the opportunity to review the organization’s expert notoriety in the business. As you can imagine, suppliers and customers will talk and in today’s world of Internet forums and review boards, it’s easier than ever to uncover tidbits that raise “red flags”.

Accessible Plastics

There are over twelve various types of plastics accessible in assembling. A few plastics are intended for holding chemicals while different plastics are utilized as a part of food prep. So as you can image, you have to examine your plastic necessities with a future plastic injection molding organization.

It doesn’t do you much good to have a few thousand items produced, just to discover it isn’t FDA affirmed for your food or it doesn’t appropriately hold the given compound.

Talk about what plastic is required for item and ensure the plastic injection molding organization can utilize this type of plastic. In the case of packaging, the wrong plastic can often derail your entire operation.

Generation Capabilities

In the event that you your organization has a noteworthy creation volume necessities, you have to comprehend what kind of production capacities the plastic injection molding organization has. This for the most part is portrayed by weight tonnage. A given machine may run somewhere in the range of 40 to 4000 tons.

The bigger the machine, the more units it can deliver in a given day and time. On the off chance that you have to create lots of units in a brief timeframe, make a point to talk about this production prerequisite with the injection molding company. One of the last problems you want after signing a contract is the in ability to produce the number of units you require, whereby setting your manufacturing back.

Does the potential molder have the production capacities you require? The assortment of machine sizes accessible for your work may matter. Some plastic injection molders concentrate on smaller machines, some on bigger, and others endeavor to have a wide scope of machine sizes.

A solid quality concentration might be essential – or possibly not. Quality-centered associations will deliver quality items on time and at an aggressive cost. On the off chance that quality and delivery are less critical, non- ISO certified companies may have slightly lower prices – yet that isn’t a sure thing.

Most molders will run the larger part of materials accessible except for PVC. On the off chance that PVC is a necessity, be sure to affirm the capacity for your company to use it. Likewise, molders may stray away from more “exotic” materials that require particular gear to run.

Past Work

Assessing past work is an all inclusive necessity before committing to any company. You should always ask for recommendations and examples from the prospective company. Not all plastic injection molding companies are created equal, which means some will stand out over others in terms of quality.

Investigate the organization’s portfolio and even don’t hesitate to get in touch with some of their clients before marking an agreement.

Our years in the business have shown us that these zones can be the most basic to investigate while assessing custom plastic injection molding company. Be diligent in your evaluation process and cap it off with an extensive factory tour and don’t skip the reference checks!

Choosing a Reliable Plastic Injection Molding Company

Choosing a Reliable Plastic Injection Molding Company

Partnering with a plastic injection molding company is a huge step for any business. But there are so many molding companies out there, it can be difficult to know where to start looking. You want to choose only the best plastic molding company that will offer reliable service at a competitive price. You also want a plastic injection molding company that will provide quality parts so your final product lives up to the expectations you had. When you choose a good injection molding company, turning any plastic product idea into a reality will be a goal you can easily achieve. But the opposite is also true, and if you choose the wrong company, you run the risk of losing valuable resources.

Because there’s a good chance that the success of your business hinges on product creation (and therefore also plastic part creation), you’ll need to know what to look for in a plastic injection molding company.


Why Your Choice Matters

As a business owner or manager, you can’t simply assume that another business will be profitable to partner with. Unfortunately there are many businesses out there who simply won’t give you the value for money you deserve.

Choosing a bad injection molding company can lead to all kinds of problems in the future. Problems you can come across in the world of injection molding include:

  • Slow production: Having enough plastic parts produced is essential to keeping your production line flowing so you can sell your finished product to consumers, so when a molding company consistently fails to meet your quota, you’ll soon feel it in your pocket. Why pay for marketing on your product when your molding company can’t produce enough parts for you to meet the demand you’re creating?
  • Faulty parts: Plastic injection molding is a delicate process that requires knowledge, education, skill and experience during part production. If your injection molding company doesn’t invest on getting the right people and tools to do the job properly, you might end up with parts that have weaknesses. If the problem goes unnoticed, this could lead to multiple refund claims from your customers after purchasing your product, all with the same defects and part failure.
  • Bad business relationships: Bad business relationships just aren’t any fun. They can cause unnecessary stress on you and can harm your reputation. When you partner with a good injection molding company, plastic part production will be simple, and feel practically like it’s automated. With the right business working for you, you’ll be able to grow your business and produce more parts later if necessary.

All and all, your plastic injection molding company will play a huge role in your business. You want to offer your customers only the best products, but in order to do so, you need to invest in assembling your final product only with the best plastic parts.

Choosing a Good Injection Molding Company

Now that you know why choosing the right injection molding company is important, it’s time to look at what you can look at to choose a company for your business to partner with.

Some important things to look at when choosing a plastic injection molding company include:

  • Staff education, training and expertise: Even the best tools and materials can’t make up for a lack of expertise. Bad molding techniques could lead to problems, like faulty parts and weak areas in parts that look otherwise fine. Everything from temperature during molding to the polymers used and the plastic injection mold design play a part in the final part, so you want to work only with a company that understands how to successfully mold any plastic part.
  • Quality of plastic injection molds: Just as the best tools can’t make up for it when a company doesn’t have experienced staff, the best staff also can’t produce good parts if a company uses bad molds, or doesn’t put effort into plastic injection mold maintenance. To get the results you want, you need to know what you’re working with when it comes to the molds themselves. A company that neglects maintenance for their injection molds will run molds till they break down. The problem with this is that badly maintained molds produce poor quality parts in the cycles leading up to the mold breakdown. This can once again have a negative influence on the quality of your final product.
  • Target market of company: Different plastic injection molding companies serve different kinds of markets. So while some companies only want to work with very big businesses, others will be willing to take on smaller projects. If you don’t fit the target market of a company, there’s a good chance you won’t have a pleasant experience working with them, even if they are a good company. A molding company that’s too small might not be able to produce parts at a rate that suits your needs, whereas a molding company that targets clients bigger than your business might constantly push back your orders to handle bigger orders first.

There aren’t any shortcuts when choosing your injection molding company. You can’t simply choose the cheapest one and expect to get good parts, but choosing the most expensive one might also be unnecessary for your business right now.

At Quality Mold Shop, we work to design, manufacture and maintain injection molds that won’t let you down. We can help in keeping your molds in good condition once you choose an injection molding company. Ask your plastic injection molding company if you can choose your own injection mold provider and maintenance business if you’re interested in working with us to get a premium American made injection mold for your product creation.

Considerations for Choosing a Plastic Injection Molding Manufacturer

Considerations for Choosing a Plastic Injection Molding Manufacturer

The manufacturing procedure can be hard to comprehend and there are many variables to consider while picking a plastic injection molding manufacturer that best suits your industry. The best place to begin is by increasing your basic knowledge the plastic injection molding process. These are the key factors any item maker ought to consider while picking a plastic injection molder:

A Guide into Sourcing Automotive Plastics

A Guide into Sourcing Automotive Plastics

For a very long time, alloys have overwhelmed the general material substance of a car. Nonetheless, in the most recent decade, because of new regulations and fuel costs, there has been a noteworthy move to utilizing lighter weight materials, most commonly plastics or composites. This ascent in the car plastics is because of the business’ push to diminish the general mass of a vehicle, which is being driven by government controls and benchmarks (CAFE), and fuel costs.

An acquisition professional should always remember the following things before settling on a plastic injection molding crew. Not only do all of the following affect the overall pricing of the component, but equally as important, they affect the quality.

Automotive Plastic Fabrication Company Quality Mold Shop McMinnville TN

Key Considerations

Car plastics present one of a kind and valuable properties, for example, sturdiness, solidness, recycle capacity, heat stability, strength, protection, design adaptability, and light weight. The most widely recognized applications for plastics in autos are with the inside, outside and motor segments since they offer a lighter-weight choice, while expanding fuel effectiveness. Plastics likewise enhance the look or style, diminish noise and vibrations (NVH), keep in heat, and so on. Plastics offer a more reasonable way to deal with a more maintainable vehicle.


To legitimately source a car plastic part, a plastic injection professional must consider and completely comprehend the procedure that the segment and application warrant. Many variables determine which process is worthy. These incorporate size, weight, shape, application, surface area, heat, stream, and so forth. The most well known plastic procedures for car applications, incorporate the accompanying:

Injection Molding

Injection molding is the most mainstream process utilized for car plastic segments. With this procedure, the plastic (in pellet frame) is put into a container which moves the plastic pellets into a warmed infusion unit, where it is pushed through a long chamber. The material is liquidized amid this procedure and solidifies in the wake of drying. For high-volume plastic segment programs, this is the prescribed procedure.

Thermoforming/Vacuum Forming

Thermoforming utilizes a plastic sheet, which is shaped with a form by applying air or through mechanical help. The pneumatic force utilized can be about zero psi, or a few hundred psi. At 14 psi, which is roughly proportional to air weight, the weight is made by emptying the space between the shape and the sheet. This is known as vacuum framing.

Blow Molding

At the point when the segment should be empty or have liquid move through, the blow shaping procedure is most useful for the application. A liquid tube is made with blow molding utilizing packed air, which explodes the tube and powers it to comply with the chilled form.

Pressure Molding

Pressure molding is the most well-known process utilized with thermosetting materials and is typically not utilized for thermoplastics. With this procedure, the material is crushed into its shape with the assistance of weight and warmth. At the point when the mold is shut and warmed, the material experiences a synthetic change that makes it solidify into the coveted shape. The temperature, weight, and time allotment used amid this procedure relies upon the coveted results.


The procedure of extrusion is normally used to make items, for example, film, ceaseless sheeting, tubes, profile shapes, poles, coat wire, fibers, cored, and cables. Similarly as with injection molding, dry plastic material is put into a container and bolstered into a long warming chamber. Toward the end of the chamber, the material is moved out of a little opening, or a die, in the state of the completed item. As the plastic leaves the die, it is put on a transport line where it is permitted to cool. Blowers are now and then used to help in this procedure, or the item might be submerged in water to enable it to cool.


In light of the use of the part, its nearness to a heat source, area on the vehicle, and process, there are an assortment of elite plastics that are broadly utilized as a part of the car business, and a plastic injection molder must consider the attributes of every while sourcing a plastic segment. The most common materials for car plastics include: Polypropylene (PP), Polyurethane (PUR), Poly-Vinyl-Chloride (PVC), Acrylonitrile Butadiene Styrene (ABS), and Polyamide (PA, Nylon 6/6, Nylon 6).


The car plastics industry is situated to grow exponentially in the coming years. Understanding the above key aspects will guarantee trust in sourcing choices and offer organizations an upper hand in settling on future choices. Despite the fact that these thoughts are perhaps basic, there are numerous plastic injection professionals today settling on key choices without considering every single potential alternative with regards to plastic preparing and material determination. A true plastic injection molding expert will invest the energy it takes to completely comprehend plastic applications, volumes, procedures, and materials before sourcing to best plan their organizations can supply for your project.

Learn more about plastics and their qualties with this article! Looking for a plastic molder?