What are the characteristics of injection molds? Compared with plastic mold polishing processing, injection mold mirror polishing processing will be a little more difficult, although its demand is not as large as plastic mold polishing, but there are still many customers need to often process the mold. Today, let’s say what are the characteristics of injection molding molds?
Injection mold features 1, cavity and core are three-dimensional surface.
The external and internal shape of the plastic parts is directly formed by the cavity and core, these complex three-dimensional surface processing is more difficult, especially the blind hole-shaped inner molding surface processing, if the traditional processing method, not only requires a high level of workers, auxiliary fixtures, tools, but also long processing cycle.
Injection mold characteristics 2, accuracy and surface quality requirements, long service life requirements.
At present, the size accuracy requirements of general plastic parts are IT6-7, surface roughness Ra0.2-0.1 m, the corresponding injection mold parts size accuracy requirements reach IT5-6, surface roughness Ra0.1 m or less. The roughness of the laser disc recording surface should reach 0.02-0.01 m of the level of mirror processing, which requires the surface roughness of the mold to reach less than 0.01 m.
Long-life injection mold is necessary to improve high efficiency and reduce costs, the current service life of injection mold generally requires more than 1 million times. Precision injection molding mold to use a large stiffness mold frame, increase the thickness of the template, increase the support column or tapered positioning elements to prevent mold pressure after deformation, sometimes the internal pressure can reach 100MPa.
The top-out device is an important factor affecting the deformation and dimensional accuracy of the product, so the optimum top-out point should be selected so that the release is uniform everywhere. High-precision injection mold in the structure of most of the use of mosaic or full-tile structure, which requires mold parts processing accuracy, interchangeability are greatly improved.
Injection mold features 3, long process, tight manufacturing time.
Mold expert Luo Baihui believes that for injection molding parts, most of them are complete products with other parts, and in many cases are in other parts have been completed, eagerly waiting for injection molding parts supporting the market. Because of the high precision of the shape or size of the product, coupled with the different characteristics of the resin material, the mold manufacturing is completed, but also need to test the mold and correction repeatedly, so that the development and delivery time is very tight.
Injection mold features 4, off-the-go design, off-the-go manufacturing.
Mold manufacturing is not the ultimate goal, but by the user to propose the final product design, mold manufacturers in accordance with user requirements, design and manufacture of molds and in most cases, the injection production of products are also in other manufacturers. This results in product design, mold design and manufacturing, and the production of products off-the-go situation.
Injection mold features 5, professional division of labor, dynamic combination.
Mold production batch is small, generally belongs to the production of a single piece, but the mold needs a lot of standard parts, large to mold frame, small to the needle, these can not and cannot be done by a single manufacturer alone, and the manufacturing process is complex, ordinary equipment and CNC equipment use is extremely uneven.