In the design of injection molds for automobiles, proce […]
In the design of injection molds for automobiles, process screws are an indispensable auxiliary tool
In the design of injection molding automobile molds, process screws are indispensable auxiliary tools, which are convenient for disassembling and assembling mold workpieces and auxiliary work clamping, which is beneficial to CNC processing.
The following introduces several common process screw design methods, which are often used in mold design.
01. Design of large inserts for mold design 01 Process screw design
Design purpose: The mold core is too heavy, and there is no position on the mold core where the process screws can be directly made, so that it is convenient to hang the mold.
Advantages: Avoid process screws affecting product appearance
Design method: insert a T-shaped insert, the cup head is sloped, and the thickness is at least 6 mm. If the surface of the top product is uneven, anti-rotation positioning is required, and the insert is fixed with locking screws.
02. Large inserts in mold design 02 Process screw design
Design purpose: The mold core is too heavy, and there is no position on the mold core where the process screws can be directly made, so it is convenient to hang the mold.
Defect: There is too much glue in the slot of the slotted screw. If the top surface of the product is not flat, the anti-rotation head cannot be made, and there will be too much glue (the depth of the screw is not easy to control and the top surface of the screw is difficult to twist to just right, and it may not work every time. Same), need to confirm with customer for reprocessing.
Design method: Inlay a T-shaped insert, make the cup head slope, the thickness is at least 6mm, tap the bottom surface, design a "slotted" groove on the top, easy to disassemble and assemble, the process screws are arranged diagonally, and the lifting is balanced.
03. Mold core process screw design for mold design
Design purpose: The mold core is too heavy, so it is convenient to hang the mold.
Design method: 4 process screws are usually designed at the four corners of the mold core, and 2 process screws can be designed at the opposite corners for small molds.
If the bottom surface of the mold core needs to be processed, and the top of the mold core is uneven, the support column needs to be designed to be flat. The support column is usually installed under the process screw, and the surface where the support column is required to be placed is flat.
If it is a curved surface, you have to cut a plane and place it in balance. In addition, the process screws should be made on the boss as much as possible, so that the support column can be placed conveniently
04. Row position (sliding position) process screw design for mold design
Design purpose: The row position (slider) is too heavy, so it is convenient to hang the mold.
Design method: design 1 to 2 process screws on the top surface of the row position, and design support columns on the side of the row position, so as to facilitate the parallel position processing of rubber position steel materials and later mold modification
05. Other parts of mold design process screw design
Usually, inserts that cannot be knocked out from the bottom or are more convenient to remove from the front require crafting screws.
In the future, it will be a summary of the process screws that are often missed:
Compression block (tight block), flange, blind-mounted hot mouth sleeve, shovel chicken bottom, oblique guide column pressure block, sinking cavity row pressure strip, front locking screw fixing insert, flange, Haval (oblique spring) row bottom