Why should precision injection molds be tried out?
The plastic box injection mold is composed of two sides, fixed mold and fixed mold, and the rear mold is placed on the moving template of the injection molding machine, and the fixed mold is placed on the fixed template of the injection molding machine. When injecting and molding, the back mold and the fixed mold are closed to form a pouring system and cavity, and the back mold and the fixed mold are separated when the mold is released, which is convenient for removing the plastic product.
Although the organization of the mold is only due to the difference in the variety and characteristics of plastic, the shape and organization of the finished plastic product and the variety of its injection molding machine, etc., the basic organization is the same. Abrasives are mainly composed of gating system applications, temperature control system applications, forming parts and layout parts. In this case, the pouring system and molded parts are one surface in contact with plastic, and change with the plastic and the product, which is a complex plastic barrel injection mold, a large transformation, and a surface with high smoothness and precision in standardized manufacturing processing.
The pouring system refers to the surface of the plastic passing through the flow channel before entering the cavity from the nozzle, including the merging channel, cold material cavity, manifold channel and glue mouth. Formed parts refer to a variety of parts that make up the shape of the product, including post-mold, fixed mold and cavity, core, forming rod and air outlet.
First, the application of pouring system
Plastic box injection mold system application, also known as runner system, is a set of feeding safety channels that lead the plastic melt from the injection molding machine nozzle to the cavity, usually composed of a combined channel, a distribution channel, a glue inlet and a cold material hole. It is related to the molding quality and manufacturing rate of the finished plastic product.
1. Merge channel
This is a safe passage in the abrasive tool that connects the injection molding machine's nozzle to the manifold or cavity. The top of the combiner is concave for easy docking with the nozzle. The aperture of the combiner inlet should be slightly larger than the nozzle aperture (O.8mm) to prevent overflow and avoid disconnection caused by inaccurate docking. The aperture of the inlet is determined according to the size of the product, which is generally 4-8mm. The combiner channel aperture should be expanded inward with a viewing angle of 3° to 5° to facilitate the mold of the excess material in the flow channel.
2. Cold material cavern
This is a cavitation built at the end of the merging channel to inject the cold material generated by the center twice at the top of the network nozzle, thereby avoiding the closure of the manifold or the glue inlet. Assuming that once the cold material penetrates the cavity, thermal stress can easily occur in the manufactured product. The diameter of the cold material cavity is about 8 to l0mm, and the depth of 1 is 6mm.
After the injection mold processing is realized, will it be invested in manufacturing? The reply is naturally denied, because there is another very tense stage - mold tryout. In the past injection molding of new molds, or when the equipment changes the manufacture of other molds, mold inspection is a necessary aspect, and the character of the mold trial judgment will simply affect the degree of victory of the manufacturer's back manufacturing.
Do you want to do a mold audition?
Whether the plastic mold is good injection molding is not good with the eyes can not be seen, ordinary plastic cover injection mold in the design of the ordinary will not be on the time as the final product, because he will have this or that kind of shortcomings after manufacturing, but this kind of shortcomings can not be managed in the manufacturing past all avoided, in the manufacturing process center is likely to produce storage manufacturing processing can not be used, so it is necessary to go through the mold test, and then the sample produced by the test mold is opened for analysis, evaluation and promotion, and then to achieve high-quality delineation. However, the shortcomings of large-scale molding products are caused by melting and injection molding processing, and may also be caused by plastic mold manufacturing differences, so in order to avoid the shortcomings of goods caused by mold design schemes, it is necessary to analyze mold design and process parameters when making molds.
After obtaining the judgment of plastic injection mold processing, the homework staff usually needs to evaluate the mold situation again, in case it is unnecessary to spend time in the mold testing process. In most cases, in order to make up for the shortcomings in the mold design, it is likely that the homework staff will make inappropriate settings without knowing it, because the scope of the foundation parameters required to create a passing product is not large, and once there is any error in the root parameters, it will cause the final product quality to be much higher than the allowable error limit.
The goal of mold testing for injection parts is to find relatively good process parameters and develop mold design schemes. It's not just about getting a better sample. Even if various components such as raw materials, machinery or the natural environment change, it can ensure stable and uninterrupted large-scale production of the natural environment.
