PVC pipe fittings can choose the corresponding injection molding machine, of course, there is also Injection molding machine for PVC PIPE FITTINGS specially designed for this purpose, and PVC pipe fittings can choose PVC injection molding machine.

PVC injection molding machine

PVC injection molding machine is generally a special machine, the screw and barrel are specially designed, and anti-corrosion treatment is done for heat-sensitive materials. The most important thing is to use a pointed screw and no check ring. PVC melt viscosity is high and easy to decompose, so check ring cannot be used. The temperature control of the barrel of the PVC injection molding machine should be precise, with forced cooling to prevent the material from decomposing due to excessive temperature. It is difficult to use PVC injection molding machines to produce products of other materials, and ordinary injection molding machines are not suitable for the production of PVC products.

Therefore, when we need to produce PVC products, we naturally have to choose a special PVC injection molding machine. In daily life, many products we encounter are made of PVC, such as industrial parts, pipe fittings, shoes, etc. The production of these products requires PVC injection molding machines.

There are also differences in the price of PVC injection molding machines in the market. The main determinants are: machine brand, machine tonnage, machine configuration, etc. Dakumar has designed a special PVC injection molding machine specifically for PVC products, and the machine has a complete tonnage specification, 110T-650T, etc., which can meet 95% of the production needs of PVC plastic products on the market. The price of the DKM brand injection molding machine is also very close to the people, which can support the needs of the majority of users for building production lines.

Why are there dents on the sidewall of PVC PIPE FITTINGS

This is a common problem. The root cause is the thermal expansion and contraction of the material. Dents are generally caused by the increase in the wall thickness of the plastic products and the local increase in the shrinkage of the product. It may appear near the external sharp corners or at the sudden changes in wall thickness, such as protrusions, ribs or behind the supports, and sometimes they may also appear. In some uncommon parts.

How to solve 

The air conditioning shrinkage of the plastic material in the facility of the component draws the relatively weaker surface area in between the partially cooled down and the a lot more cooled down sharp edge inner. This way, nicks were actually produced externally of the injection formed component. The visibility of dents indicates that the mold and mildew shrinkage fee here is higher than the shrinking of its outer parts. If the shrinkage of a molded component is greater than another, therefore the shaped component is the source of warpage.

Recurring stress in the mold will definitely lower the impact toughness as well as temperature protection of the shaped part. Sometimes, changing the process disorders can easily stay clear of the occurrence of nicks. For example, in the process of storing the pressure of the shaped component, added plastic material is administered right into the mold and mildew tooth cavity to make up for the mold and mildew contraction. In most cases, eviction is actually a lot thinner than other parts of the part. When the molded part is actually still warm and also reduces constantly, the tiny entrance has actually been actually remedied. After healing, the tension holding performs not influence the molded part in the tooth cavity.

Formed aspect of semi-crystalline plastic materials possess a high shrinking rate, that makes the nick issue more severe; non-crystalline components have reduced creating shrinking, which decreases dents; filled as well as sustained improved materials, the contraction fee Lower, the option of nicks is much less.

Strong shot built parts take a number of years to cool and also are going to create greater shrinkage. As a result, sizable fullness is the origin of damages. Treatment must be actually taken when designing. Thick-walled parts should be actually prevented as much as possible. If thick-walled parts can easily not be prevented, they need to be made as empty. Yes, heavy parts are going to efficiently shift to the small wall surface density. Utilizing huge arcs as opposed to pointy sections can easily eliminate or reduce the damages produced near the pointy edges.

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