Thick plastic part and method of making and tool
View Patent ↗In some embodiments, a tool includes, in an injection molding machine, a movable internal core configured to receive a molded plastic layer thereon, the molded plastic layer having a thickness. The tool also comprises an injection nozzle configured to inject plastic material over the movable internal core to form the molded plastic layer; an ejection plate connected to the movable internal core; and multiple, movable support plates each having a thickness. The multiple, movable support plates are located behind the ejection plate. A movable support plate of the multiple, movable support plates is configured to determine the thickness of the molded plastic layer.
1. A tool comprising, in an injection molding machine:
an injection nozzle configured to inject plastic material over a movable internal core to form a molded plastic layer;
an ejection plate connected to the movable internal core, and
multiple movable support plates each having a thickness, wherein the multiple movable support plates are located behind the ejection plate, and
wherein a movable support plate of the multiple movable support plates is configured to determine the thickness of a molded plastic layer.
2. The tool of claim 1 , wherein the movable internal core comprises an undercut, the undercut configured to directly receive the injected plastic material to form the molded layer directly on the undercut.
3. The tool of claim 2 , wherein the undercut is configured to be separated from the plastic part after production.
4. The tool of claim 1 , wherein the tool is configured to eject the movable support plates by use of an ejection rod followed by retraction of the ejection rod to remove a support plate.
5. The tool of claim 1 , wherein the movable support plates each comprises a thickness of between 0.2 mm to 10 mm.
6. The tool of claim 5 , wherein the thickness of each of the movable support plates is the same.
7. The tool of claim 5 , wherein the thickness of each of the movable support plates are not all the same thickness.
8. The tool of claim 1 , wherein the number of movable support plates is greater than two.
9. The tool of claim 8 , wherein the movable support plates each comprises a thickness of between 0.2 mm to 10 mm.
10. The tool of claim 1 , wherein the movable support plates are formed of metal.
11. The tool of claim 1 , further comprising a wear sleeve located around the movable internal core.
12. The tool of claim 11 , wherein the wear sleeve comprises a hardness lower than a hardness of the movable internal core.