1. Traces of core pulling Injection molded
parts injection molding molding trace technology, injection molded parts core pulling traces, generally in the injection molded part hole or groove or injection molded part obstacle. The core pulling marks are composed of two kinds of marks, one is the friction marks caused by the movement of the mold core slider, and the other is the traces of condensate in the gap between the core slider and the chute on the injection molded part. There are many forms of core-pulling, such as external core-pulling, internal core-pulling and oblique core-pulling, etc. Shanghai Mulan Injection Molding Factory can determine the core-pulling form according to the core-pulling traces. Core pulling traces can be observed and mapped by eyes. Boss and hole core-pulling marks. Hole and flange core pull marks. The core-pulling traces of the oblique slider are parallel to the two circular holes and the core-pulling traces of the flange.
2. Traces of demoulding
The traces of demoulding, the traces of demoulding are the traces of condensed material on the injection molded parts by the demoulding components when the injection mold is removing the injection molded parts. Among them, the demoulding traces of the ejector pin and the push tube are the most clear, and the traces of the ejector pin can directly reflect the shape, size, position and quantity of the ejector pin. The traces of stripping the mold are not easy to observe. There are also traces of stripping when stripping the plastic-coated metal parts. There are no traces of stripping when stripping the mold manually.
Core pulling traces can be observed and mapped. Small ejector pin demoulding traces, large ejector pin demoulding marks, multiple ejector pin demoulding marks, arc-shaped ejector pin demoulding marks, ejector pins with height difference plane demoulding marks, gear ejector pin demoulding marks.
3. Traces of living blocks and inlays
Traces of live blocks and inlays. The loose block is the component that the injection molded part is put into the mold before the injection molding process, and the mold loose block that needs to be taken out after the injection molded part is demolded. Inserts are components that remain fixed in the mold from start to finish. During the injection molding process of injection molded parts, some profiles require mold structures that use loose blocks or inserts. Then, there must be traces of molten plastic condensate in the gap between the loose block or the insert and the mold matrix. Traces of living blocks and mosaics have certain shapes, sizes and positions, which can be observed and mapped.
4. Other types of traces
During the injection molding process of Shanghai Mulan Injection Molding Factory, there will be traces of processing lines, flashes, burrs, wear marks and bruises on the surface of injection molded parts.
① Processing traces Processing traces, since the mold surface is processed by injection molding processes such as turning, grinding, electric spark, wire cutting, grinding, chemical corrosion and electroplating, the traces produced by various processing tools during the processing It will be imprinted on the mold surface. So these traces are on the surface of the injection molded part, and we can judge the injection molding process method of the mold surface according to the processing traces on the surface of the injection molded part.
②Flashes, burrs and wear marks are caused by, firstly, a large gap between the mating surfaces during mold processing; secondly, the mold has been used for too long, resulting in a large gap due to the movement and wear between the mating surfaces. Therefore, during the injection molding process of injection molded parts, these marks will be on the surface of injection molded parts, and the marks of these processing tools can be observed by eyes on the surface of injection molded parts.
③Modeling lines Plastic parts such as flashes and burrs often appear on the parting surface, core pulling and ejector pins of injection molded parts. Like the thin wings of cicadas with burrs, they are generally thin and irregular in shape. These remaining materials are excess materials on the injection molded parts, which are scraped off with a knife made of a hacksaw blade. The process of scraping off flashes and burrs with a knife is called modification. After modification, there will be no flash and burr in the injection molded part, and there will be traces scraped by the tool on the surface of the modified injection molded part. It is difficult to observe the traces of the gate, parting surface and core pulling on the modified injection molded parts, especially if the gate is set at the position of the ejector pin, if the remaining material of the ejector pin is removed, the gate will not be visible. Mouth. There is also a latent gate, and it is not easy to see the traces of the gate after removing the remaining material.
④ Bump marks In the process of processing and moving the mold, the surface of the mold is bumped with other objects, and raised and concave scars appear on the surface of the mold, and there will be corresponding bump marks on the injection molded parts for molding and injection molding. For injection molded parts with bruises, the mold needs to be repaired to repair the bruised surface of the mold.
Injection molding processing molding trace technology of injection molded parts, during the injection molding process of injection molded parts, the molten plastic will truly imprint all the conditions of the working surface of the injection mold on the injection molded parts, so various patterns will appear on the surface of the injection molded parts Traces of a mold structure. Shanghai Mulan Injection Molding Factory can restore the structure of the mold by analyzing the traces of these mold structures, and can also provide strong evidence for the formulation, review, cloning design, manufacturing and reproduction of the mold structure plan. This technology of using mold structure traces is injection molded parts trace technology, and the theory of using injection molded parts trace technology to analyze and explain mold structure design and defect formation and remediation is injection molded parts trace science. With the trace technology and trace science of injection molded parts, the mechanism and phenomenon of injection molded parts in the process of molding and injection molding can be explained.
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