Rust of injection processing mold and its elimination method

Update:29-11-2019
Summary:

The rust of the injection processing mold and its elimi […]

The rust of the injection processing mold and its elimination method are also tools for providing a complete structure and precise dimensions to plastic products. The structure and processing quality of injection molds directly affect the quality and production efficiency of plastic parts. Common failure causes and troubleshooting methods in the production of injection molds and plastic products are described in detail as follows:

The fixed-distance tensioning mechanisms such as hooks and buckles are generally used for fixed core drawing or some secondary demoulding. Since this mechanism is arranged in pairs on both sides of the mold, its actions must be performed simultaneously, that is, the mold is closed at the same time, the mold is opened to a certain position, and decoupling is performed at the same time. Once synchronization is lost, it will cause the template to draw the mold to be tilted and damaged. The components of these mechanisms should have high rigidity and abrasion resistance and be difficult to adjust. The mechanism has a short lifespan and should be avoided as much as possible, while other mechanisms can be substituted. Mold manufacturers sometimes do not pay attention to this problem, often change the original design size, or replace the mobile template with low-strength steel plates, and use the top material of the ejector rod in the mold because the large span between the two sides of the valve seat causes the injection molding process. The template is bent. Therefore, the mobile formwork must be made of high-quality steel, and it must have sufficient thickness. Low-strength steel plates such as A3 cannot be used. If necessary, support columns or blocks should be set under the mobile formwork to reduce the thickness of the formwork and improve the carrying capacity.

During the injection molding process, the mold manufacturer sticks the gate to the gate sleeve, which is difficult to remove. When the mold is opened, the product is cracked. In addition, the operator must use a copper rod head to knock out from the nozzle to loosen it before demoulding, which seriously affects production efficiency. The main cause of this failure is the poor finish of the taper hole of the gate, and the inner hole has knife marks in the circumferential direction. The second is that the material is too soft. After a period of use, the small end of the tapered hole is deformed or damaged, and the spherical arc of the nozzle is too small, resulting in a riveted joint of the castable. It is difficult to process the taper hole of the door sleeve, and standard parts should be used as far as possible. If you need to handle it yourself, you should also get yourself or buy a special reamer. The conical hole needs to be above ground in radians. In addition, a gate lever or gate injection mechanism must be provided.