Consideration of clamping force
The side locking force of the die is relatively small, so for large products with large projection area, the direction with large projection area should be placed in the direction before and after opening and closing the die, and the side projection area is small, which is called side parting.
Meet the requirements of product demoulding
Parting surface is designed for the product to take out the mold smoothly. Therefore, the location of parting surface should be selected in the part with the largest section size of the product, which is the most basic principle.
Parting surface shape
For general products, the parting surface perpendicular to the opening direction of the injection molding machine is often used. In special cases, the parting surface of other shapes can be used. The shape of parting surface is based on the principle of convenient processing and demoulding. Like a curved product, its separation depends on the curvature of its curvature.
Ensure product appearance and quality
Do not choose products with smooth surface for parting surface. Generally, the appearance surface is not allowed to have lines affecting the appearance, such as clamping lines; for some products with concentricity requirements, you must put all parts with concentricity requirements on the same side to ensure their concentricity.
When determining the positioning of the product in the mold, the parting surface should be selected to prevent the formation of side holes or side buckles, and complex mold structure should be avoided.
Good for demoulding
Generally, the demoulding mechanism of the mould is in the dynamic mould, so the selection of the parting surface should be made as much as possible after the opening of the dynamic mould. Therefore, for some places that may adhere to the mold, we often add the mold to assist the demoulding mechanism.
Consider the side opening distance
Generally, the opening distance of transverse machinery is relatively small. Therefore, when selecting parting surface, the direction of long core pulling distance should be selected in the opening and closing direction of front and rear dies, and the direction of short core pulling distance should be selected in side parting.
Mold parts are easy to process
When selecting parting surface, the mould should be divided into parts which are easy to be machined to reduce the machining difficulty.
Good for exhaust
When the parting surface is used as the main exhaust, the parting surface shall be designed at the end of the plastic flow to facilitate exhaust.
For the parting of many products in mold design, there is a whole circle of R angle on the parting surface, so the best R parting should be considered when parting, and no sharp edge should appear.
The above is a detailed introduction of Jinan mold's advantages in mold making specifications. For more information, please click http://www.jnhjgs.cn