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June 28, 2019

In-depth comparison of the practicality of heavy calcium and light calcium

Calcium carbonate not only can reduce the raw material cost of plastic products, but also has the effect of improving certain properties of plastic materials. Different types of calcium carbonate...

June 27, 2019

10 factors affecting the quality of injection molds

Mold manufacturing is a complicated process. From the steps of design, processing, assembly, debugging, etc., to the final use, there are mainly 10 factors that affect the quality of the mold throughout the life cycle.
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June 26, 2019

Top ten plastic molding processes

First, injection molding

(1) Injection 
Injection : also known as injection molding, the principle is to add granular or powdery raw materials into the hopper of the injection machine, the raw material is heated and melted in a flowing s...

June 25, 2019

Analysis the problems of plastic granulation-hollowness, overflowing, bridging flocculation.

Hollowness problem

1. Exhaust (or steam) is not smooth
Due to natural exhaust or vacuum exhaustion (may be too heavy in the material itself, it may also be decomposed by additive...

June 19, 2019

Causes and countermeasures of molding failure of PVC injection molding products

Short shot
(1) The melt temperature is too low. The molding temperature should be appropriately increased.
(2) The molding cycle is too short. Should be extended appropriately.
(3) The injec...

June 18, 2019

Top 10 common problems and solutions in the production process of PVC injection molding products


1. Burning burnt stripes from the gate:
Reduce the injection speed; enlarge the gate or nozzle diameter; reduce the injection pressure; increase the material temperature (i...

June 14, 2019

Process parameters and production problems of hard polyvinyl chloride (UPVC) injection molding

Process characteristics:

The raw materials to be mixed have different process conditions for the molded articles. The raw materials mixed with various additives and polyvinyl c...

June 11, 2019

What are the different design requirements for PVC pipes&fittings in drainage and water supply systems ?

PVC pipe & fitting mainly include PVC drainage pipe&fitting, PVC water supply pressure pipe&fitting, PVC electrical casings, etc. Of course, there are also new...

June 6, 2019

PA, PVC, PMMA, PC, POM, PE, PP, ABS, accurate introduction and stress testing

1. PA, PVC, PMMA, PC, POM, PE, PP, ABS, PS, EVA and some mixtures.
 

2. Common plastic characteristics and performance:
 

2.1. PA (nylon): 8026 upper cover, 532 support, 049D inner core, and the...

June 6, 2019

The operating principle of the extruder

With the wide application and development of plastic extruder molding processes, the types of plastic extruders are increasing and the classification methods are also inconsistent. According to the spatial position of the screw, i...

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The role of the three functional zones of the PVC extruder

March 18, 2019

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