Tag Archive for: plastic molds

PVC injection molding

CPVC – (Chlorinated polyvinyl chloride) is an injection moldable resin used in pipe, pipe fittings, and other injection molded plastic products, we called PVC injectioin molding parts

CPVC is extremely durable typically used in long service-life applications such as plumbing and fire sprinkler pipe, residential window trim and industrial process equipment.

Resistance to corrosion and chemical attack is one of the important properities of CPVC, often replacing metals to provide longer service-life in handling corrosive materials such as aggressive water, mineral acids, caustics and other aqueous solutions.

Because of its low petroleum content, CPVC is self-extinguishing and has a relatively low smoke generation. Smoke generated from CPVC is no more toxic than Douglas Fir.

Compared with many thermoplastics, CPVC has excellent mechanical strength over a broad temperature range.

Typical applications include:

  • potable water system components
  • automotive and mass transit parts
  • process systems for corrosive industrial environments
  • food and beverage process food equipment

    plastic molds

    plastic molds

INCERE TECH is fully equipped and experienced when it comes to both plastic injection molding CPVC and building molds for CPVC.

If you have a need any PVC injection molding  or tooling to produce injection molded CPVC partsST can solve your needs.

Plastic injection molders are numerous. So to stand out above the crow, we at ST are dedicated to excellence in all aspects of our business.

We will supply our customers with only the highest quality parts, delivered on time, while providing them with service second to none in the plastic injection molding industry.

We will provide our valued employees a safe, reliable and professional work atmosphere which fosters a sense of pride in the quality of work they do, as well as a
path to prosperity as our teamwork makes our company grow.

This sense of pride we get from giving our best to our customers, our employees, our country and the plastic injection molding industry will provide the motivation to take us to the top.

Plastic Injection Molding Process

Plastic Injection Molding Process normally including injectioin filling, Injection pressue and injection packing pressure.

Injection Pressure will affect the products quality. So a suitable injection pressure does a big favor to high-quality products.

Injection pressure involves two stages. The first stage is, inject the melt plastic material into mold by a high speed, this pressure called first injection pressure. We always called it injection pressure too. Second stage is, the pressure we put after plastic material filled mold, called second injection pressure or packing pressure. Melt plastic material’s resistance related to the characteristic of melt, the shape of product and the mold structure, therefore, first injection pressure should be set according to the specific requirement. Generally, the first injection pressure is about 80~120 Mpa (800~1200kgf/cm2).

For the material with high viscosity, or for the product which need high size precision, we can use 150~200 Mpa or higher injection pressure. Once, some injection molding machine manufacturer said he had used 400Mpa injection pressure, but under normal condition, the plastic injection machine which on the market cannot reach this injection pressure.

Too low first injection pressure will lead to short filling. Too high first injection pressure can increase the product density, decrease the shrinkage. But if the injection pressure is too high, flash will happen, sometimes, the product cannot drop down easily.

Therefore, when we testing mold, at the beginning, injection pressure should be low, then improved gradually, finally confirm a suitable injection pressure.

In addition, injection pressure adjustable rang is related to the kinds of injection molding machine. For exempla, for small home appliance, in order to increase the injection pressure, we should choose injection molding machine with big screw diameter. Fig 2-3:plastic molds

Fig 2-3: Screw diameter and injection unit performance

                                       Screw typeproject           A             B             C
Screw diameter/mmInjection pressure/ Mpa

Theoretical injection pressure/ Mpa

Injection weigh/g


Injection rate/ (cm3/s)

Plasticizing capability/ (kg/h)



















Even the same injection molding machine manufacture by the same manufacturer, different screw diameter will has different max injection pressure. We should confirm the max injection pressure whether meet our requirement.

Second injection pressure (packing pressure) is the pressure which acts on material. The role second injection pressure played is, on the basic of avoiding burr and excessive filling, using melt material supplemented unceasingly, to avoid shrinkage of product.

From the effect of second injection pressure we known, the pressure of second injection pressure should be lower than first injection pressure. But second injection pressure must guarantee the material in cavity fully cures, that is, material in every runner fully cures too.

Want to know more information about plastic  molds and injection molding cost or plastic injection molding process, go to https://en.wikipedia.org/wiki/Injection_moulding , you will solve your issues there.

Injection Molding Machine

Do you have any idea about the auto loader manufacturer? Basically it is used in the injection mould machine. To know more you have to search on the topic over the internet. Moulding machines spare energy and produces less sound as well as giving high execution. Auto Loader makers are utilized for stacking of crude materials or plastic sap into the machines. Auto loaders make the work more straightforward via immediately stacking the segments into the mould machine.

How the auto loader fits into the moulding machine

Auto Loader is the most fundamental thing that is used in plastic shaping machine. There are numerous Auto Loader producers for this supporting part of the injection mould machine. It has an enormous market demand because of the differing purposes. It might be utilized for stacking of crude materials or plastic gum into the machines. So it can work resourcefully on Read more

Plastic Injection Molding China

Presently we are more adjusted to the use of the plastic products, plastic molds, plastic molding parts, These plastics are accessible at diverse sizes and shapes and distinctive thickness dependent upon the requisitions utilized. These requisitions incorporate transportation, space, home needs, developments, hardware parts, bundling, composition materials and electrical parts and so forth. These plastic materials are made by injection mold process and blow embellishment process. There are numerous organizations as an infusion trim machine supplier to give machines and extras for the plastic material assembling. How is the auto loader manufacturer characterizing his machines? The infusion machines in today’s business sector are propelled forms which incorporates auto loader machines. Read more