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Feasibility Analysis Method for Injection Molding Deformation of Injection Molded Parts
Shanghai Mulan Injection Molding Factory analyzes the elements of deformation and dislocation. It should be noted that both of them have a certain degree of concealment. They seem to be difficult to find, but they have obvious rules, mainly from the geometric errors and technical requirements of injection molded parts. . For the deformation factor, it is necessary to find the requirements for flatness and straightness in the injection molding process of injection molded parts, especially pay attention to thin, long and thin injection molded parts and injection molded parts with multiple tooth shapes and unevenness. For dislocation elements, it is not only necessary to find the requirements for symmetry on injection molded parts, but also to pay attention to thin-walled parts. Then, look for measures to solve the deformation and misalignment of injection molded parts.
1. Feasibility analysis method of mold structure scheme for injection molding deformation elements of injection molded parts
Most of the deformation of injection molded parts during injection molding is caused by improper selection of demoulding methods and internal stress.
① The avoidance method of the obstacle element of the injection molded part is an analysis method for the mold structure scheme of how to avoid warping, deformation and cracks of the injection molded part for various forms of deformation elements on the injection molded part.
② Feasibility analysis method of mold structure scheme for injection molding deformation elements of injection molded parts. There are many forms of injection molding deformation elements of injection molded parts, but for the conventional feasibility analysis method of injection mold structure scheme, it refers to only one single Deformation elements. Even if there are multiple forms and multiple quantities of deformation elements on the injection molded parts, they have to be solved one by one, and then concentrated and coordinated with each other to achieve unity.
2. Feasibility analysis method of mold structure scheme for dislocation elements of injection molded parts
Dislocation element analysis method, Shanghai Mulan Injection Molding Factory aims at various forms of dislocation elements on injection molded parts, how to formulate a mold structure plan to avoid dislocation of injection molded parts. For molds that form high-precision injection molded parts, it is not enough to rely solely on these general guiding and positioning mechanisms. Additional guiding and positioning mechanisms for injection mold positioning and secondary positioning are required to ensure the accuracy of injection mold guiding and positioning. These mechanisms are mainly used in the secondary positioning and precise positioning of the movable mold and the fixed mold; the positioning of the cavity and the core: the slider guide, etc. Of course, in addition to the guiding and positioning mechanism, the precision injection mold also needs to have high-precision mold parts processing, mold assembly accuracy, sufficient rigidity and wear resistance, good temperature control system, reasonable pouring system and plastic Variety selection and coordinated mold movement mechanism, etc.
① The positioning of the cavity and the core is generally carried out by convex, concave cones or taper holes for secondary positioning and precise positioning without gaps, so as to ensure precise guidance and positioning of injection molded components.
②The positioning of the slider and the core, the feasibility analysis method of the injection molding deformation of the injection molded parts, there will be various shapes and inner holes on the injection molded parts of Shanghai Mulan Injection Molding Processing Factory, and the dimensional accuracy of the inner and outer shapes, coaxial There are certain requirements for the uniformity of thickness and wall thickness. If the injection mold uses a slider to open the mold structure and cannot ensure the quality of the injection molded part, it is necessary to position the slider and core for the hole and groove of the injection molded part. At this time, only relying on the guide device on the injection mold base cannot satisfy the accuracy of the relative position of the fixed mold cavity and the dynamic mold cavity or the core of the precision injection mold, and a secondary positioning system is also required; if the two ends of the parting surface are used When the secondary positioning device still cannot avoid the dislocation of the movable and fixed mold cavities, a gapless secondary positioning device with tapered surfaces on the four sides of the movable and fixed molds should be used.
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