EnviroTech’s unique proprietary bulk injection molding process allows EnviroTech to manufacture and produce large thick-walled polymer components that are simply impossible for other injection molders.

Heavy injection molding uses a variety of space-age materials and additives to achieve the weight you need. Our processes ensure timely production and exacting standards of quality as well as the affordability you enjoy with standard injection molded products.

These are the ring-shaped stripes that occur on the surface of a product and are centered around the feed port. It can be prevented by taking the following measures:

9. Increase the cross-sectional area of the gate (main runner, branch runner, and feed port) and reduce its length, to allow the resin to flow more easily.

At EnviroTech Custom Injection Molders, we assist our customers with anything from the most diminutive part to the largest injection molded components. But, when working on substantial components – heavy, thick-walled or especially large – we have capabilities that you may not find elsewhere in the industry.

These are the cracks that occur on the surface or the contact surface with the insert of a product. When viewed from a certain angle, it will flicker and emit light. The causes of this defect are relatively complicated, which, however, can be prevented by taking the following measures:

Our strict and exacting quality control processes allow us to provide consistently high-quality results without sacrificing time or economy. With our ability to customize injection molding solutions for our customers, you get the results you demand, time after time.

Our technology and sophisticated automation capabilities allow us to complete even the most massive thick wall molding production runs quickly without compromising quality output. Even complex components are no match for our experience and capability.

EnviroTech has over 50 years of experience and expertise in the injection molding space, optimizing part design for mold-ability and polymer resin engineering. With presses ranging from 850 – 2500 tons, and our experienced process control techniques that give us the ability to mold virtually any thermoplastic polymer resin and additive composition (see Polymer Resin Section), that opens the door to products for metal replacement and a wide range of industrial applications that were never before believed possible.

Our expansive facility operates around the clock to meet our customers’ needs. And, although we consistently meet the needs of our clients, we always strive to exceed their expectations.

7. Increase the cross-sectional area of the gate (main runner, branch runner, and feed port) and reduce its length, to allow the resin to flow more easily and reduce the barrel temperature.

3. Are there any other resins mixed in the pre-dryer, or are there any foreign substances caused by friction between the dryer and the receiver?

The defects in the injection molding of acrylic PMMA usually include: short shot, silver streaks, sink marks, voids, jetting, weld marks, gray / black specks, cracking, warpage, and material impurity, while the preventive measures against them are usually:

Our company is known around the world as the industry leader in thick-walled injection molding. We have one of the largest shot capacities in the industry, allowing us to produce exceptional quality thick wall molding components that are void-free. We also design, engineer and manufacture large shot and thick-walled molds.

We assist customers across virtually every sector and industry, including defense, mining, energy, oil and gas, agriculture, automotive, and deep-sea drilling rigs. We specialize in mold design, polymer resin engineering, mold optimization and troubleshooting, and custom injection molding of all types.

These are the voids that occur where the product wall is thick. For transparent PMMA products, they will become an exterior defect that cannot be remedied later. Insufficient drying before molding or excessive barrel temperature may cause voids to occur in areas other than the center of the thick wall. If the shrinkage is concentrated in the thick wall, voids will appear in the center of the thick wall. It can be solved by the prevention of shrinkage, or by the following measures:

These are the silver-white streaks on the product surface which are generated in the feed port along the flow direction of the resin. Caused by multifaceted factors, silver streaks can be prevented by taking the following measures:

PMMA acrylic are widely used in all aspects of the optical field, so it is extremely necessary to prevent the mixing of impurities. Usually, there are many ways for foreign substances to be mixed in. It is time-consuming to find out the reason, but you can start with the following aspects:

5. Does the strong friction between the metal wall of the hopper loader and the acrylic pellets cause the metal wall to peel off?

5. Increase the cross-sectional area of the gate (main runner, branch runner, and feed port), and reduce its length, to allow the resin to flow more easily

We offer a wide variety of polymer and engineering resin materials for you to choose from. We can recommend the best materials for your needs or, if necessary, we can work with our engineering resin manufacturing partners to design a material formulation just for you.

As the leading large part injection molder in the United States, EnviroTech designs, engineers and produces large injection-molded polymer resin components. Our streamlined processes and in-house production facility allow us to complete massive production runs quickly and affordably.

We have assembled a substantial collection of state-of-the-art equipment at our in-house design and production facility. Using cutting-edge technology and a half-century of experience, we have the ability to produce extremely large, heavy and thick-walled injection molded components.

When you need the best heavy, large or thick wall molding services, call on the experts at EnviroTech for all your bulk and custom injection molding needs.

1. When cooled with water after ejection, increase the temperature of the cooling water or reduce the water-cooling time

6. Is there any soot or dust mixed in from the vents of the hopper loader, or whether there are foreign substances generated by the hopper loader itself?

This is caused because the resin does not fill the cavity fully. To prevent its occurrence, we can take the following measures:

Using thermoplastics and polymer resins, EnviroTech has the ability to manufacture substantial components that have all the benefits of polymer injection molded parts – reduced cost, quick turnaround, minimal environmental impact – as well as the desired weight.