Insert positioning structure in die

[0012] Such as figure 1 As shown, the insert positioning structure in the mold of the present invention includes a sleeve 2 and a sealing block 3. The sealing block 3 is annular, the sleeve 2 is fixedly connected to the sealing block 3, and the sealing block 3 is connected to the mold. The body 1 is fixedly connected. The sleeve 2 is provided with at least one positioning groove (not marked in the figure) along the circumferential direction of the sleeve, and a first polytetrafluoroethylene protective sleeve 4 is installed in the positioning groove. As shown in the figure, A positioning groove is provided in the sleeve 2, and a first polytetrafluoroethylene protective sleeve 4 is correspondingly provided in the positioning groove. The sealing block 3 is provided with a second polytetrafluoroethylene protective sleeve 5.

[0013] As a preferred solution, in the present invention, the inner surface of the sealing block 3 is provided with a groove 9 along the circumferential direction of the sealing block, and a pressure ring 7 which can move along the axial direction of the sealing block 3 is arranged in the groove 9 such as figure 2 As shown in the figure, a plurality of guide pins 8 are provided in the groove 9, and the pressure ring 7 is provided with holes corresponding to the guide pins 8, and the guide pins 8 pass through the corresponding holes on the pressure ring 7. The ring 7 can move relative to the guide pin 8. The second PTFE protective sleeve 5 is located between the pressing ring 7 and the mold body 1, and the sealing block 3 is provided with a tightening screw 6. When the tightening screw 6 is tightened, the pressing ring 7 can be pushed along the guide The pin 8 moves to push the second Teflon protective sleeve 5 so that the second Teflon protective sleeve 5 abuts against the end of the mold body 1, which can prevent material leakage during injection molding.

[0014] When assembling the mold, the insert 10 is inserted into the sleeve 2 along the two PTFE protective sleeves 4, 5, and then the mold is closed. During injection, the PTFE protective sleeves 4, 5 are thermally expanded and wrapped in the insert. Position the insert 10 on the part 10; after injection molding, after the plastic is thermoset, when the product is demolded, the insert 10 is smoothly released under the guidance of the two PTFE protective sleeves 4 and 5, which improves the parts Quality and pass rate.