Overall layout planning of injection mold processing design

1、 Design assignment for injection mold processing

The task statement for plastic parts processed by injection mold is usually proposed by the part planner, and its contents are as follows:

(1) the formal part drawing approved and signed shall indicate the trademark and transparency of the selected plastic.

(2) clarification of plastic parts or skill requirements.

(3) output value of injection mold processing.

(4) samples of plastic parts processed by injection mold. Usually, the injection mold planning task is proposed by the plastic part technician according to the plastic part forming task, and the mold planner plans and designs the injection mold design and processing based on the plastic part forming task and mold planning task.

2、 Collect, analyze and digest raw materials

Collect and collect relevant part planning, injection mold molding skills, injection mold processing equipment, machining and special processing materials for use in mold planning. (1) digest the drawing of plastic parts, know the purpose of the parts, and analyze the skill requirements of plastic parts, such as the skill and scale accuracy. For example, what are the requirements of plastic parts in terms of appearance shape, color transparency and application function, whether the layout, inclination, insert and other conditions of plastic parts are reasonable, the degree of acceptance of forming defects such as weld lines and shrinkage holes, and whether there are post-processing such as coating, electroplating, bonding and drilling. Select the scale with the highest dimensional accuracy of plastic parts for analysis to see if the molding service is lower than that of plastic parts, and whether the plastic parts that meet the demand can be molded. In addition, you should know the plasticization and molding skill parameters of plastics. (2) digest the skill materials and analyze whether the molding methods, equipment types, material specifications, mold layout types and other requirements proposed in the skill assignment are appropriate and can be implemented. The molding materials shall meet the strength requirements of plastic parts, and have good mobility, uniformity, isotropy and thermal stability. According to the use of plastic parts, the molding materials should meet the requirements of dyeing, metal plating conditions, decoration function, necessary elasticity and plasticity, transparency or opposite reflection function, bonding or weldability, etc.

3、 Selection of injection molding equipment

The injection mold processing design is based on the variety of molding equipment, so it is necessary to be familiar with the functions, specifications and characteristics of various molding equipment. For example, as for the injection machine, the following contents should be known in terms of specifications: injection capacity, mold locking pressure, injection pressure, mold equipment size, ejection equipment and size, nozzle hole diameter and nozzle spherical radius, gate sleeve locating ring size, maximum and minimum thickness of mold, template stroke, etc. see relevant parameters for details. It is necessary to start to measure the dimension of the mold shape and determine whether the mold can be used on the selected injection machine.