Plastic threading mold
- Home
- Plastic threading mold
When we need a threading mold
When a plastic molded product has threads (spirals) on it, there is an inverted concavity and the molded product cannot be removed from the cavity by normal remolding methods. A large number of molded products with threads, such as caps, containers and mechanical components, are used worldwide.
What are the ways to get to unscrewing in process threaded molded product by injection molding?
1.Manual placement e core
In this structure, a pre-processed threaded metal core is mounted in the cavity and, after injection molding; the core is removed together with the molded product and then removed by rotating the core by hand. This method is not suitable for high volume production, but is suitable for pilot and small batch production. Mold costs are also kept low
2.Split mold
In this configuration, the threaded section consists of a side core slider, which is removed by opening the side core slider. These molds are constructed in a number of different ways, such as side core sliders that allow the parting face to be fully opened and closed.
3.Rotating cores
This method involves setting up a structure in the mold that can be driven to rotate, and machining the threads on the rotating core. In conjunction with the mold opening action, an external drive source (rack and pinion, motor, chain drive, etc.) is used at the appropriate time to rotate the rotating core to extract the screw. In this case, the molded product also rotates, so that a recess or protrusion is required to prevent the molded product from rotating.
4.Special cores
Fordable cores (collapsible cores) can be used to deflate the parting section forming the threaded section by moving the push tube back and forth, thus removing the threaded section.
Muyoung proceeds with the mold design by judging the suitability of these mold structures based on the customer’s need to use the function of the thread, and then determining the specific structure to be used. If the structure of the threaded part is not designed carefully enough, it may not move well or the threaded part may not pull out as expected, so it is important to refer to the skilled thought design and the existing technical examples.