Short pitch core-pulling mold

Abstract

The utility model discloses a short distance hinge tooth core-pulling mould, including fixed mould plate, oil cylinder, rack, composite gear, more than one screw core gear, more than one screw core, the cylinder body of oil cylinder is fixed on the outer wall of fixed mould plate, and the piston rod end of oil cylinder is connected with the outer end of rack, and the inner end of rack is inserted into fixed mould plate, and the middle part of rack is engaged with pinion in composite gear, and the bull gear of composite gear is engaged with screw core gear, and screw core gear fixed sleeve is connected on screw core, and the lower extreme of screw core is inserted into the cavity. The utility model will oil cylinder, rack, composite gear, screw core gear, screw core etc. core-pulling mechanism of drawing female screw is set in upper die, and the core-pulling of female screw is completed before opening mould, and after opening mould, the plastic product is ejected by using the top rod, and the thin place of plastic product outer wall will not be damaged, and the core-pulling of plastic product with thin wall is realized.

Description

Technical Field

[0001] This utility model relates to an injection mold, and more particularly to a short-pitch reamer core-pulling mold. Background Technology

[0002] Plastic injection molds are tools used in the production of plastic products and have a wide range of applications. In the injection molding of plastic products, for example... Figure 1 As shown, since the outer wall 101 of the plastic product 100 is thin and has internal threads 102, conventional ejector pins have no point of force when ejecting. If a conventional ejection structure is used, it is easy to damage the wall surface of the plastic product 100. Utility Model Content

[0003] The purpose of this invention is to provide a short-distance reamer core-pulling mold that ensures the integrity of thin-walled plastic products.

[0004] To achieve the above objectives, the technical solution of this utility model is:

[0005] This utility model is a short-pitch reamer core-pulling mold, including a fixed template, a hydraulic cylinder, a rack, a compound gear, one or more threaded core gears, and one or more threaded cores;

[0006] The cylinder body is fixed on the outer wall of the fixed template. The piston rod end of the cylinder is connected to the outer end of the rack. The inner end of the rack extends into the fixed template. The middle part of the rack meshes with the small gear in the compound gear. The large gear of the compound gear meshes with the threaded core gear. The threaded core gear is fixedly sleeved on the threaded core. The lower end of the threaded core extends into the cavity.

[0007] There are two threaded core gears and two threaded cores, and both threaded core gears mesh with the large gear of the compound gear.

[0008] This utility model also includes a panel, an upper clamping plate, a movable template, a base plate, a square iron, a lower mold base, a top plate, and an ejector rod; the panel, upper clamping plate, and fixed template are fixed together in sequence, the top surface of the movable template is in contact with the bottom surface of the fixed template, the movable template is fixed together with the base plate, the base plate is fixed together with the lower mold base by the square iron, and an ejection space is formed between the base plate and the lower mold base. The top plate and ejector rod are installed in the ejection space, the lower end of the ejector rod is fixed on the top plate, and the upper end of the ejector rod passes through the base plate and the movable template in sequence and extends into the cavity.

[0009] This utility model also includes a cylinder seat; the cylinder is fixed to the side wall of the fixed template by the cylinder seat.

[0010] By adopting the above solution, since this utility model includes a fixed template, a hydraulic cylinder, a rack, a compound gear, a threaded core gear, and a threaded core, the core-pulling mechanism for extracting the internal thread, including the hydraulic cylinder, rack, compound gear, threaded core gear, and threaded core, is set in the upper mold. The core-pulling of the internal thread is completed before the mold is opened, and the plastic product is ejected by the ejector rod after the mold is opened. This will not damage the thinner part of the outer wall of the plastic product, thus realizing the core-pulling of plastic products with thin walls.

[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 It is an isometric drawing of a plastic product;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the core-pulling mechanism of this utility model. Detailed Implementation

[0015] like Figure 2 , Figure 3 As shown, this utility model is a short-pitch hinge core-pulling mold, including a panel 1, an upper clamping plate 2, a fixed template 3, a moving template 4, a base plate 5, a square iron (not shown in the figure), a lower mold base 7, a top plate 8, a push rod 9, a hydraulic cylinder 10, a rack 11, a compound gear 12, two threaded core gears 13, two threaded cores 14, and a hydraulic cylinder base 15.

[0016] The panel 1, upper clamping plate 2, and fixed template 3 are fixed together in sequence. The top surface of the movable template 4 is in contact with the bottom surface of the fixed template 3. The movable template 4 is fixed together with the base plate 5. The base plate 5 is fixed together with the lower mold base 7 by square iron. An ejection space is formed between the base plate 5 and the lower mold base 7. The top plate 8 and ejector rod 9 are installed in the ejection space. The lower end of the ejector rod 9 is fixed on the top plate 8. The upper end of the ejector rod 9 passes through the base plate 5 and the movable template 4 in sequence and extends into the cavity.

[0017] The cylinder body of the hydraulic cylinder 10 is fixed to the outer wall of the fixed template 3 by the hydraulic cylinder seat 15. The piston rod end of the hydraulic cylinder 10 is connected to the outer end of the rack 11. The inner end of the rack 11 extends into the fixed template 3. The middle part of the rack 11 meshes with the small gear 121 in the compound gear 12. The large gear 122 of the compound gear 12 meshes with two threaded core gears 13 respectively. The threaded core gears 13 are fixedly sleeved on the threaded core 14. The lower end of the threaded core 14 extends into the cavity.

[0018] The working principle of this utility model:

[0019] This utility model sets up a core-pulling mechanism for extracting internal threads, including a hydraulic cylinder 10, a rack 11, a compound gear 12, two threaded core gears 13, and two threaded cores 14, in the upper mold. Before the mold opens, the hydraulic cylinder 10 drives the two threaded core gears 13 to rotate through the rack 11 and the compound gear 12. The threaded core gears 13 drive the threaded cores 14 to rotate, thus completing the core-pulling of the internal thread 102 in the plastic product 100. After the mold opens, the plastic product 100 is ejected by the ejector rod 9.

[0020] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model should still fall within the scope of the patent of the present utility model.

Claims

1. A short-pitch hinge core-pulling mold, characterized in that: Includes fixed template, hydraulic cylinder, rack, compound gear, one or more threaded core gears, and one or more threaded cores; The cylinder body is fixed on the outer wall of the fixed template. The piston rod end of the cylinder is connected to the outer end of the rack. The inner end of the rack extends into the fixed template. The middle part of the rack meshes with the small gear in the compound gear. The large gear of the compound gear meshes with the threaded core gear. The threaded core gear is fixedly sleeved on the threaded core. The lower end of the threaded core extends into the cavity.

2. The short-pitch reamer core-pulling mold according to claim 1, characterized in that: There are two threaded core gears and two threaded cores, and both threaded core gears mesh with the large gear of the compound gear.

3. The short-pitch reamer core-pulling mold according to claim 1, characterized in that: It also includes a panel, an upper clamping plate, a moving template, a base plate, a square iron, a lower mold base, a top plate, and an ejector rod; the panel, upper clamping plate, and fixed template are fixed together in sequence, the top surface of the moving template is in contact with the bottom surface of the fixed template, the moving template is fixed together with the base plate, the base plate is fixed together with the lower mold base by the square iron, forming an ejection space between the base plate and the lower mold base, the top plate and ejector rod are installed in the ejection space, the lower end of the ejector rod is fixed to the top plate, and the upper end of the ejector rod passes through the base plate and the moving template in sequence and extends into the cavity.

4. The short-pitch reamer core-pulling mold according to claim 1, characterized in that: It also includes a cylinder seat; the cylinder is fixed to the side wall of the fixed template by the cylinder seat.

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