Plastic mold manufacturer, general manufacturing process of plastic mold Plastic mold manufacturer, general manufacturing process
mold

Plastic mold manufacturer, general manufacturing process of plastic mold

Plastic mold manufacturer, general manufacturing process of plastic mold

I. assignment for plastic mold
mold
Plastic mold manufacturer

The specification for molded plastic parts is generally proposed by the part demander, and its contents are as follows:

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

2. specification or technical requirements for plastic parts.

3. output value.

4. samples of plastic parts.

The general plastic mold planning assignment is proposed by the plastic part technician according to the assignment of the molded plastic parts. The mold planner plans the mold based on the assignment of the molded plastic parts and the mold planning assignment.

II. Collect, analyze and digest the original data, collect and sort out the relevant part planning, molding technology, molding equipment, machining and special processing data for use in mold planning.

1. digest the drawings of plastic parts, know the use of the parts, and analyze the technical requirements of plastic parts, such as the technicality and standard accuracy. For example, what are the requirements of plastic parts in terms of surface shape, color transparency and application function, whether the geometric layout, inclination, insert and other conditions of plastic parts are reasonable, the allowable degree of forming defects such as weld lines and shrinkage holes, and whether there are post-processing such as coating, electroplating, bonding, drilling, etc. Select standards with high standard accuracy for plastic parts to analyze, and see if the estimated forming tolerance is lower than that of plastic parts, and whether plastic parts that meet the requirements can be formed. In addition, we also need to know the plasticization and molding technical parameters of plastics.

2. digest the technical data, and analyze whether the molding method, equipment type, data standard, mold layout type and other requirements proposed in the technical specification 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 data should meet the requirements of dyeing, metal plating, decoration function, necessary elasticity and plasticity, transparency or opposite reflection function, bonding or weldability, etc.

3. determine the forming process

Direct pressing, casting and pressing are still injection methods.

4. Select molding equipment

According to the variety of molding equipment to mold, so it is necessary to be familiar with the functions, standards and characteristics of various molding equipment. For example, as for the injection machine, the following contents should be known in terms of standards: injection capacity, mold locking pressure, injection pressure, mold equipment standards, ejector equipment and standards, nozzle hole diameter and nozzle spherical radius, gate sleeve locating ring standards, mold large thickness and small thickness, template stroke, etc. see relevant parameters for details.

We should start to estimate the mold shape standard, and judge whether the mold can be used on the selected injection machine.

5. detailed layout plan

(I) determination of mold type

Such as binding die (open, semi closed, closed), casting die, injection die, etc.

(II) primary layout for determining mold type

The choice of mold layout is to determine the necessary molding equipment and the number of mold cavities, so that the operation of the mold itself can meet the technical and economic needs of the plastic parts under certain reliable conditions. The technical requirements for plastic parts are to ensure the geometric shape, surface finish and standard accuracy of plastic parts. The economic demand of production is to make the cost of plastic parts low, the production efficiency high, the mold can work continuously, the service life is long, and the labor force is saved.

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