Good plastic injection molding processing refers to the commissioner to provide raw materials and molds, plastic injection molding processor in accordance with the commissioner's requirements for the manufacture of plastic injection molded products and processing fees charged by the business.
Good injection molding processing is a wide range of knowledge, technical and practical industry. Injection molding production process requires the use of plastic raw materials, color powder, sprues, molds, injection molding machines, peripheral equipment, jigs and fixtures, sprays, a variety of auxiliary materials and packaging materials, etc., which bring a lot of workload and a certain degree of difficulty in the management of injection molding workshop, and other industries or sectors compared to the injection molding workshop management personnel at all levels of the requirements of a higher.
Injection molding production requires 24-hour continuous operation, generally for the two sides of the three cutter shift or three-shift work mode, injection molding workshop workplace jobs are many, the division of labor is complex, the skills of the different positions of the personnel requirements are also different. In order to make the production operation of the injection molding workshop smooth, it is necessary to manage the personnel, materials, equipment, tools, etc. involved in each link and each position, mainly including: raw material room, crushed room, batching room, production site, post-processing area, tool room, semi-finished products area, office and other areas of the operation and coordination of the management of the work.
For good high-precision plastic parts and difficult to grasp the shrinkage rate, it is generally appropriate to use the following method of mold design:
①Take a smaller shrinkage rate of the outer diameter of the plastic parts, take a larger shrinkage rate of the inner diameter, in order to leave room for correction after the trial mold.
②Trial mold to determine the form of casting system, size and molding conditions.
3 to post-processing of plastic parts by post-processing to determine the size of the change (measurement must be 24 hours after the release of the mold.)
④Correct the mold according to the actual shrinkage.
⑤Try the mold again and change the process conditions to slightly correct the shrinkage value to meet the requirements of the molded part.
Thermoplastic fluidity size, generally from the molecular weight size, melt index, Archimedes spiral flow length, performance viscosity and flow ratio (process length / wall thickness) and a series of indexes to analyze. Small molecular weight, wide molecular weight distribution, poor molecular structure regularity, high melt index, screw flow length, performance viscosity is small, flow ratio of the flow is good, the same name of the plastic must be checked to determine whether the fluidity of its instructions are suitable for injection molding.