1. Basic design ideas:

  According to the basic requirements of plastic parts and the technological performance of plastics, carefully analyze the manufacturability of plastic parts, correctly determine the molding method and molding process, select the appropriate plastic injection molding machine, and then design the plastic mold.

Second, the design needs attention:

  1. Consider the relationship between the process characteristics of the plastic injection molding machine and the mold design;

  2. The rationality, economy, applicability and practical feasibility of the mold structure.

  3. The correctness of the structural shape and size, the feasibility of the manufacturing process, the requirements and correctness of the material and heat treatment, the representation of the view, the size standard, the shape position error and the surface roughness and other technical requirements must comply with international standards or national standards.

  4. Factors such as ease of processing, maintenance and repair, safety and reliability should be considered in the design.

  5. Considering the actual production conditions, the design of the mold is easy to process and the cost is low.

  6. For complex molds, consider using mechanical processing methods or special processing methods, how to assemble after processing, and having enough mold repair allowance after mold trial.

3. Plastic mold design process:

  1. Accept the assignment book:

  Generally there are the following three situations:

  A: The drawings and technical requirements of the plastic parts approved by the customer (two-dimensional electronic drawing files, such as AUTOCAD, WORD, etc.). At this time, it is necessary to build a 3D model (product design work content), and then produce a 2D engineering drawing.

  B: The drawings and technical requirements of the plastic parts approved by the customer (3D electronic drawing files, such as PROE, UG, SOLIDWORKS, etc.). As long as the two-dimensional engineering drawings. (for common use)

  C: The customer provides samples of plastic parts, prototypes, and real objects. At this time, the surveying and mapping plastic parts are required to be copied and processed, and then a three-dimensional model is constructed, and then a two-dimensional engineering drawing is produced.

  2. Collect, analyze and digest raw data:

  A: Analysis of plastic parts

  a: Clarify the design requirements of the plastic parts, understand the materials used for the plastic parts, the design requirements, the use occasions, assembly and appearance requirements of the plastic parts with complex shapes and high precision requirements through the drawings.

  b: Analyze the possibility and economy of the molding process of plastic parts

  c: The production batch of plastic parts (production cycle, production efficiency) is generally indicated in the customer order.

  d: Calculate the volume and weight of the plastic part.

  The above analysis is mainly to select injection equipment, improve equipment utilization, determine the number of mold cavities and the size of the mold feeding cavity.

  B: Analyze the molding process of plastics: molding method, molding equipment, material type, mold type, etc.

  3. Master the actual production situation of the manufacturer:

  A: The technical level of factory operators

  B: Manufacturer's existing equipment technology

C: Technical specifications of molding equipment Diameter of the positioning ring of the injection machine, spherical radius and aperture size of the front end of the nozzle, maximum injection volume, injection pressure, injection speed, clamping force, maximum and minimum distance between the fixed side and the movable side , the projected area of ​​the fixed plate and the movable plate and the position and size of the installation screw holes, the adjustable length of the pitch-adjusting nut of the injection machine, the maximum mold opening stroke, the distance between the tie rods of the injection machine, the diameter and position of the ejector rod, the ejection stroke, etc. .

  D: Ordering and processing methods of mold materials and accessories commonly used by manufacturers (preferably processed in our factory)

  4. Determine the mold structure:

  General ideal mold structure:

  A: Process technical requirements: geometric shape, dimensional tolerance, surface roughness, etc. conform to international standards.

  B: Production economic requirements: low cost, high productivity, long service life of the mold, easy processing and manufacturing.

  C: Product quality requirements: meet all the requirements of the customer's drawings.