Determining the Specifications of Injection Mold Bases
Determining the specifications of injection mold bases is a crucial step that directly affects the structural strength, service life, and manufacturing cost of the mold. Selecting the appropriate base specifications ensures the mold's stable and reliable operation during the injection molding process.
Factors Affecting the Selection of Base Specifications
Part Size and Shape: The size, shape, and wall thickness of the plastic part directly determine the size and complexity of the mold.
Injection Machine Specifications: The clamping force, injection volume, and locking force of the injection machine influence the choice of the mold base.
Mold Structure: The number of cavities, gate location, and cooling system of the mold affects the size and structure of the mold base.
Production Volume: For large-scale production, standard mold bases can be considered, while custom mold bases can be considered for small-batch production.
Steps to Determine Base Specifications
Determine Part Dimensions: Measure the maximum outer dimensions of the plastic part, including length, width, and height, according to the part drawing.
Select Base Series: Choose a suitable base series based on the part size and injection machine specifications. Common base series include 1515, 2025, 2530, etc., where the numbers represent the standard dimensions of the base.
Determine Base Thickness: The base thickness is determined based on the part thickness, mold complexity, and clamping force of the injection machine.
Determine Base Height: The base height is determined based on the part thickness, number of cavities, and arrangement of the cooling system.
Determine Base Hole Dimensions: Determine the size and location of the holes on the base according to the shape and size of the plastic part.
Consider Special Requirements: If the mold has special requirements, such as the need for additional reinforcing ribs or cooling holes, these should be considered during mold design.
Principles for Determining Base Specifications
Sufficient Base Strength: The base must be able to withstand various forces during the injection molding process, such as clamping force, injection pressure, and cooling pressure.
Good Base Rigidity: The base must have sufficient rigidity to ensure the stability of the mold under high temperature and high pressure.
Reasonable Base Dimensions: The base dimensions should match the part dimensions, avoiding being too large or too small.
Simple Base Structure: The base structure should be as simple as possible for easy processing and assembly.
