1、 Acceptance assignment

The plastic parts task statement is generally submitted by product designers, and its content is as follows:

On the approved formal product drawings, indicate the brand and transparency of the selected plastic.

2. Instructions or technical requirements for plastic products.

3. Production.

4. Plastic samples.

Plastic mold design and manufacturing

2、 Plastic mold design and manufacturing Collect, analyze, and digest raw materials

Plastic mold design and manufacturing Materials related to plastic part design, molding processes, molding equipment, machining, and special processing, used in preparing mold design.

Digest plastic product drawings, understand product usage, and analyze technical requirements such as processability and standard accuracy of plastic products. For example, what are the requirements for the appearance, shape, color transparency, and application functions of plastic products? Select a standard with higher accuracy for plastic parts to analyze, and check whether the molding service is lower than that of plastic parts. Check whether the geometric structure, slope, and embedded parts of the molded product are reasonable, whether the tolerance for forming defects such as welding marks, shrinkage, and whether there is any post processing such as coating, electroplating, bonding, and drilling. Whether the plastic parts that meet the requirements can be molded. In addition, we also understand plastic plasticization and molding process parameters.

2. Digest process materials, analyze whether the molding methods, equipment types, material standards, mold structure types, and other requirements proposed in the process assignment are suitable and feasible. Molding materials meet the strength requirements of plastic products, with excellent fluidity, uniformity, isotropy, and thermal stability. According to the use of plastic products, molding materials should meet the requirements of dyeing, metal plating conditions, decoration functions, required elasticity and plasticity, transparency or opposite reflective functions, adhesion, or weldability.

3. Decide which molding method to choose: direct pressing method, casting method, or injection method.

4. Select molding equipment

The design and manufacturing of plastic molds are based on the types of molding equipment, and it is necessary to understand the functions, standards, and characteristics of various molding equipment. For example, regarding injection machines, there is a need to understand the following in terms of standards. Injection capacity, mold closing pressure, injection pressure, mold equipment standards, ejection equipment and standards, nozzle aperture and nozzle spherical radius, gate bushing retainer standards, larger and smaller mold thicknesses, template travel, etc. With detailed reference to relevant parameters, start budgeting mold appearance standards to determine whether the mold can be used on the selected injection machine.

5. Detailed structural plan for plastic mold design and manufacturing

1) Recognition of the types of plastic mold design and manufacturing, such as stamping molds (open, semi closed, closed), die casting molds, injection molds, etc.

2) Recognize the primary structure of the plastic mold design and manufacturing type

Choosing the desired plastic mold design and manufacturing is to recognize the required molding equipment, desired mold cavity quantity, and the technical requirements for plastic products are to ensure the geometric shape, surface finish, and standard accuracy of the plastic product. Under reliable conditions, the mold's own operations can meet the technical and production economic requirements of the plastic product. The economic requirements are to reduce the cost of the plastic product, achieve high production efficiency, and enable the mold to operate continuously, Long service life and labor saving.

3、 There are many and complex factors that affect the design and manufacturing structure of plastic molds and the single system of molds.

1. Settle the mold cavity, acknowledge the number of mold cavities and their placement methods, based on the characteristics of the geometric structure of the parts, standard accuracy requirements, batch size, mold manufacturability, mold cost, etc.

2. Acknowledge that the parting surface and its orientation are conducive to mold processing, exhaust, demolding, and molding operations, as well as the surface quality of plastic parts.

3. Acknowledge the venting method of the gating system (the shape, orientation, and size of the main runner, sub runner, and gate), and the venting system, as well as the orientation, size, and size of the venting slot.

4. Select the ejection method (ejector rod, pipe jacking, push plate, combined ejection), and recognize the side pressure treatment method and core pulling method.

5. Acknowledge the cooling and heating methods, the shape and orientation of the heating cooling tank, and the equipment location of the heating element.

6. Acknowledge the thickness and appearance standards, appearance structure, and all connection, positioning, and orientation of mold parts based on mold material, strength accounting, or experience data.

7. Acknowledge the structural method of primary molding parts and structural components.

8. Consider the strength of each part of the mold and calculate the operating standards of the molded parts.