What should we pay attention to in the selection of standard mold frame

When ordering the mold, the mold factory will choose the standard mold as much as possible in order to improve efficiency, which is becoming more and more common, especially with the in-depth understanding and acceptance of the concept of "standardization" by domestic enterprises, the standardization of mold materials will be more and more in the future. Of course, mold factories need to pay attention to some problems when purchasing standard mold frames:

1. Mold thickness H and the closing distance of the injection machine L For different types and specifications of injection machines, different structural forms of mold locking mechanisms have different closing distances. The relationship between mold thickness and closing distance is as follows:

2. The dimensional relationship between the opening die stroke and the distance between the fixed and moving die and the distance required for the release of the plastic part must be calculated when designing. The opening die stroke of the injection machine should be greater than the distance between the fixed and moving die required for the removal of the plastic part, and the distance between the mold and the plastic part should be less than the rated ejecting stroke of the ejecting hydraulic cylinder of the injection machine.

3. Pay attention to the installation of the selected mold frame on the injection machine: the outline size of the mold frame should not be affected by the distance between the rod of the injection machine; Positioning aperture and positioning ring size should be well matched; Whether the position of ejector rod hole and ejector stroke of injection machine are suitable; Whether the nozzle aperture and spherical radius are compatible with the aperture of the mold gate sleeve and the size of the concave spherical surface; The position and aperture of the mounting hole of the mold frame are matched with the corresponding screw holes on the moving template and the fixed template of the injection machine.

4. The selection of mold frame should meet the technical requirements of the plastic parts and its molding process in order to ensure the quality of plastic parts and the performance and reliability of the mold, it is necessary to accurately check and calculate the mechanical properties of the mold frame combination parts, especially their strength and stiffness, to determine the length, width and thickness of the dynamic and fixed template and support plate, so as to correctly select the specifications of the mold frame.