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Structural parts of plastic molds

date：2023/08/10

1, the composition
 
The structure of the blow molding, the casting mold and the thermoforming mold is relatively simple.
 
Compression molding, injection molding and transfer molding are more complicated, and there are many parts that constitute such molds.
 
The basic parts are:
 
1 Molded parts, including concave molds, punches, and various forming cores, are all parts of the inner and outer surfaces or upper and lower end faces, side holes, undercuts and threads of the molded product.
 
2 Supporting fixed parts, including mold base plates, fixing plates, support plates, spacers, etc., for fixing the mold or supporting the pressure.
 
3 Guide parts, including guide posts and guide sleeves, to determine the relative position of the mold or push mechanism movement.
 
4 core parts, including oblique pins, sliders, etc., used to extract the movable core when the mold is opened, so that the product is demoulded.
 
5 The introduction of parts, including push rods, push tubes, push blocks, pusher plates, pusher rings, push rod fixing plates, push plates, etc., to demould the product. The injection molds are promoted by standard mold bases, which are composed of basic parts that have been standardized and serialized in structure, form and size. The mold cavity can be processed according to the shape of the product. The use of standard formwork helps to shorten the molding cycle.
 
2, the role of common mold base parts
 
Fixed mold plate (panel): Fix the front mold on the injection molding machine.
 
Flow path plate (water plate): Remove the waste handle when opening the mold to make it fall off automatically (three-plate mold).
 
Fixed mold fixing plate (A plate): the front part of the molded product.
 
Dynamic mold fixing plate (B plate): the mold part of the molded product.
 
Pad: Die foot, its role is to allow the top plate to have enough space for movement.
 
Push plate: When the mold is opened, the product is pushed out from the mold by pushing the parts through the top rod, the top block, the inclined top and the like.
 
Movable seat plate (base plate): The rear mold is fixed on the injection molding machine.
 
Guide post and guide sleeve: play the guiding position, assist the front and rear mold opening, and the mold and basic positioning.
 
Support column (head): Improve the strength of the B plate, effectively avoiding the deformation of the B plate caused by long-term production.
 
Top plate guide column (medium support): Guided positioning push plate to ensure smooth ejection.