• 2023-10-05
• 801
• 5 Comments

Five problems that make injection mold manufacturing difficult

The cavity and the core form a vertical body surface.

The external and internal shape of the plastic parts is directly formed by the cavity and core, these complex vertical surface processing difficulty is relatively large, especially the cavity of the blind hole molding surface processing, if the traditional processing method, not only requires a high level of technical workers, auxiliary fixture more, more tools, and long processing cycle.

High precision and surface quality requirements, long service life requirements.

At present, the dimensional accuracy requirements of general plastic parts are IT6-7, surface roughness Ra0.2-0.1μm, and the corresponding dimensional accuracy requirements of injection mold parts are IT5-6, and the surface roughness Ra0.1μm is below.

The roughness of the laser disc recording surface should reach 0.02-0.01μm of the level of mirror processing, which requires the surface roughness of the mold to reach 0.01μm or less. Long-life injection molds are necessary to improve efficiency and reduce costs, and the service life of injection molds is generally required to be more than 1 million times.

Injection mold

Precision injection mold should use a mold frame with large stiffness, increase the thickness of the template, increase the supporting column or conical positioning element to prevent the deformation of the mold under pressure, and sometimes the internal pressure can reach 100MPa.

Ejector device is an important factor affecting the deformation and dimensional accuracy of the product, so a good ejector point should be selected to make the ejector uniform everywhere. Most of the high-precision injection moulds are inset or fully integrated in structure, which requires the processing accuracy and interchangeability of the mold parts to be greatly improved.

The process is long and the manufacturing time is tight.

For injection parts, most of them are complete products with other parts, and in many cases, other parts have been completed, eagerly waiting for the injection parts to be listed. Because the shape or size accuracy of the product is very high, and because of the different characteristics of the resin material, after the mold manufacturing is completed, it is also necessary to repeatedly test and correct the mold, so that the development and delivery time is very tight.

Off-site design, off-site manufacturing.

Mold manufacturing is not the final purpose, but by the user to put forward the final product design, mold manufacturers according to the requirements of users, design and manufacture molds and in most cases, the injection production of products is also in other manufacturers. This results in the design of products, mold design and manufacturing and the production of products in different places.

Professional division of labor, dynamic combination.

The 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 the mold frame, small to the thimble, these can not and cannot be completed by a manufacturer alone, and the manufacturing process is complex, the use of ordinary equipment and CNC equipment is extremely unbalanced.