Die with replaceable die core

Abstract

The utility model discloses a mould with a replaceable mould core, which comprises an upper mould plate, a lower mould plate, an upper mould core, a lower mould core, a framework and a solid colloid, the framework is arranged in a lower mould cavity of the lower mould plate, and the framework is fixedly connected with the lower mould core through a positioning hole on the lower surface of the framework and a positioning pin on the top of the lower mould core. The lower surface of the framework is attached to the surface of the lower die cavity, the framework is further locked into a first lower die core screw hole of the lower die core through a workpiece screw, and the solid colloid is laid on the upper surface of the framework. According to the utility model, the solid colloid is heated to become a molten semi-solid and then is bonded with the framework to form an integrated workpiece, and the workpiece is fixed in the lower die cavity by the workpiece screw, so that the workpiece cannot be bonded in the upper die cavity, the framework can be quickly positioned and fixed, the die stripping is smooth, the workpiece cannot be bonded with the die, and the flash is easy to remove; therefore, the produced workpieces are good in consistency and high in production efficiency.

Description

Technical Field

[0001] The utility model belongs to the production and manufacturing of mechanical operation tools in the pavement engineering field, and particularly relates to a mold with replaceable mold cores. Background Technique

[0002] Products made of rubber by vulcanization in a mold under high temperature and high pressure are called rubber molded products. According to different pressing principles of rubber products, they can be mainly divided into three categories: compression molds, transfer molds, and injection molds.

[0003] A compression mold is a mold that loads rubber compound into the mold cavity and obtains rubber products through pressurization and heating vulcanization by a flat vulcanizing machine. The largest ones are automobile tires, and the smallest ones are lighter seals with a diameter of only a few millimeters. The material, dimensional accuracy, exhaust, and ease of mold opening of the mold directly affect the quality, labor intensity, and production efficiency of rubber products. At the same time, the selection of mold material, heat treatment and other manufacturing processes, as well as the assembly quality of the mold, directly affect the service life of the mold. Therefore, when designing the mold, first, the shape and structure characteristics of the rubber parts should be carefully analyzed and studied, and based on this, a reasonable mold structure, reasonable material, and heat treatment process should be selected and designed to meet the requirements of rubber products and the use requirements of the mold. After vulcanization, the mold is easy to open, which can improve production efficiency and the service life of the mold, thus improving economic benefits. Content of the Utility Model

[0004] To solve the defects existing in the prior art, the utility model provides a mold with replaceable mold cores.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model provides a mold with replaceable mold cores, including an upper template, a lower template, an upper mold core, and a lower mold core. The top of the upper mold core is locked in the upper mold accommodation part of the upper template by an upper mold fastening screw, and the bottom of the lower mold core is locked in the lower mold accommodation part of the lower template by a lower mold fastening screw. It also includes a skeleton and a solid colloid. The skeleton is arranged in the lower mold cavity of the lower template. The skeleton is fixedly connected to the lower mold core through the positioning holes on the lower surface of the skeleton and the positioning pins at the top of the lower mold core. The lower surface of the skeleton fits with the surface of the lower mold cavity. The skeleton is also locked into the first lower mold core screw hole of the lower mold core by a workpiece screw. The solid colloid is laid on the upper surface of the skeleton. The solid colloid is used to become a molten semi-solid state after heating and fill the entire upper and lower mold cavity space under pressure. And after demolding, the skeleton and the colloid are bonded into an integral workpiece, and the workpiece screw fixes the workpiece in the lower mold cavity so that the workpiece will not adhere to the upper mold cavity.

[0007] Preferably, the upper die core has a first step portion and a second step portion. The first step portion includes the top surface of the upper die core and a first step surface.

[0008] The second step portion includes a second step surface, a third step surface, a first forming surface, a second forming surface, and the bottom surface of the upper die core. The second forming surface is conical, having an included angle β, and the angle range is 10 - 18°.

[0009] Preferably, a screw hole of the upper die core is provided inwardly on the top surface of the upper die core. The screw hole of the upper die core is used to lock the upper die core in the receiving portion of the upper template through an upper die fastening screw.

[0010] Preferably, the upper die core adopts a rotating body cylindrical structure, including four outer diameters from top to bottom, which are φa, φb, φc, φd respectively, and φb > φc > φd > φa.

[0011] Preferably, a counterbore of the upper die core is provided at the lower end of the upper die core. The counterbore of the upper die core includes a first counterbore surface, a second counterbore surface, a third counterbore surface, and a fourth counterbore surface. The counterbore of the upper die core has a maximum depth H from the bottom surface of the upper die core to the fourth counterbore surface.

[0012] Preferably, the first counterbore surface has an inner diameter φe; the third counterbore surface adopts a conical columnar structure, the third counterbore surface has an included angle γ, the angle range is 10 - 18°, and the third counterbore surface has a minimum inner diameter φf and a maximum inner diameter φg.

[0013] Preferably, the lower die core adopts a conical columnar structure. The lower die core includes a positioning pin and a lower die core main body from top to bottom. The positioning pin has an outer diameter φh. The positioning pin includes a first positioning pin surface and a second positioning pin surface. A first lower die core screw hole is provided inwardly on the first positioning pin surface.

[0014] The lower die core main body includes a first lower die core surface, a second lower die core surface, and a third lower die core surface. The second lower die core surface is conical. The second lower die core surface has an included angle α, the angle range is 30 - 36°, and the second lower die core surface has a maximum outer diameter φi and a minimum outer diameter φj.

[0015] Preferably, a second lower die core screw hole is provided inwardly from the center on the third lower die core surface. The second lower die core screw hole is used to lock the lower die core in the lower die receiving portion of the lower template through a lower die fastening screw.

[0016] The utility model has the following beneficial effects compared with the prior art:

[0017] In the present utility model, both the upper die core and the lower die core are locked in the upper template and the lower template respectively through corresponding fastening screws. When the die core is damaged and needs to be replaced during use, it can be replaced conveniently, without affecting the service life of the die and the product quality, and saving the cost of processing the die.

[0018] At the same time, in the present utility model, after the solid colloid is heated to become a molten semi-solid state, it is bonded to the skeleton to form an integral workpiece. The workpiece screws fix the workpiece in the lower die cavity, so that the workpiece will not adhere to the upper die cavity, enabling rapid positioning and fixing of the skeleton, smooth demolding, no sticking of the workpiece to the die, and easy removal of flash. Thus, the workpieces produced have good consistency and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Full sectional view of the upper die core of the die with replaceable die core of the present utility model;

[0020] Figure 2 Full sectional view of the lower die core of the die with replaceable die core of the present utility model;

[0021] Figure 3 View of the upper and lower dies of the die with replaceable die core of the present utility model before mold closing;

[0022] Figure 4 is Figure 3 Full sectional view of A-A in

[0023] Figure 5 View of the upper and lower dies of the die with replaceable die core of the present utility model after mold closing;

[0024] Figure 6 is Figure 5 Full sectional view of B-B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not intended to limit the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings of the specification, Figure 1 which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Embodiment

[0028] As Figures 1 to 2 shown, this embodiment provides a mold with replaceable mold cores, including an upper template 1, a lower template 5, an upper mold core 3, and a lower mold core 7. The upper mold core 3 has a first step portion and a second step portion. The first step portion includes the top surface 30 of the upper mold core and a first step surface 31; the second step portion includes a second step surface 32, a third step surface 33, a first forming surface 34, a second forming surface 35, and the bottom surface 36 of the upper mold core. The second forming surface 35 is conical, with an included angle β, and the angle range is 10 - 18°. In this embodiment, 10°, 16°, or 18° can be selected. An upper mold core screw hole 301 is provided inward on the top surface 30 of the upper mold core. The upper mold core 3 is locked in the receiving portion 20 of the upper template 1 through the cooperation of the upper mold core screw hole 301 and an upper mold fastening screw 4.

[0029] Specifically, the upper mold core 3 adopts a rotary cylindrical structure and includes four outer diameters from top to bottom, which are φa, φb, φc, and φd respectively. φa is 30 mm, φb is 50 mm, φc is 40 mm, and φd is 35 mm. A counterbore 302 is provided at the lower end of the upper mold core 3. The counterbore 302 of the upper mold core includes a first counterbore surface 37, a second counterbore surface 38, a third counterbore surface 39, and a fourth counterbore surface 300. The counterbore 302 of the upper mold core has a maximum depth H from the bottom surface 36 of the upper mold core to the fourth counterbore surface 300, and the size is 10 mm. The first counterbore surface 37 has an inner diameter φe, and the size is 30 mm; the third counterbore surface 39 adopts a conical columnar structure. The third counterbore surface 39 has an included angle γ, and the angle range is 10 - 18°. In this embodiment, 10°, 16°, or 18° can be selected. The third counterbore surface 39 has a minimum inner diameter φf and a maximum inner diameter φg, and the sizes are 13 mm and 18 mm respectively.

[0030] In this embodiment, the lower die core 7 has a conical columnar structure. The lower die core 7 includes a positioning pin 70 and a lower die core main body 78 from top to bottom. The positioning pin 70 has an outer diameter φh with a size of 13 mm. The positioning pin 70 includes a first positioning pin surface 73 and a second positioning pin surface 74. The first positioning pin surface 73 is provided with a first lower die core screw hole 71 inwardly; the lower die core main body 78 includes a first lower die core surface 75, a second lower die core surface 76, and a third lower die core surface 77. The second lower die core surface 76 is conical. The second lower die core surface 76 has an included angle α with an angle range of 30 - 36°. In this embodiment, 30°, 33°, or 36° can be selected. The second lower die core surface 76 has a maximum outer diameter φi and a minimum outer diameter φj with sizes of 32 mm and 18 mm. A second lower die core screw hole 72 is provided on the third lower die core surface 77 from its center inwardly. The lower die core 7 is locked in the lower die accommodating portion 60 of the lower template 5 through the cooperation of the second lower die core screw hole 72 and the lower die fastening screw 8.

[0031] As Figures 3 to 6 shown, this embodiment further includes a skeleton 91 and a solid colloid 90. The skeleton 91 is disposed in the lower die cavity 6 of the lower template 5. The skeleton 91 is fixedly connected to the lower die core 7 through the positioning holes on the lower surface 92 of the skeleton and the positioning pin 70 at the top of the lower die core 7. The lower surface 92 of the skeleton is in contact with the surface of the lower die cavity 6. The skeleton 91 is also locked into the first lower die core screw hole 71 of the lower die core 7 through the workpiece screw 10. The solid colloid 90 is laid on the upper surface 93 of the skeleton. The solid colloid 90 is used to become a molten semi - solid state when heated and fill the entire upper and lower die cavity space under pressure. And after mold opening, the skeleton 91 and the colloid 90 are bonded into an integral workpiece 9. The workpiece screw 10 fixes the workpiece 9 in the lower die cavity 6, so that the workpiece 9 will not adhere to the upper die cavity 2.

[0032] The working principle of this embodiment will be further described below:

[0033] Lock the upper die core 3 into the accommodating portion 20 of the upper template 1 through the upper die fastening screw 4, and lock the lower die core 7 into the lower die accommodating portion 60 of the lower template 5 through the lower die fastening screw 8. Then, place the skeleton 91 into the lower die cavity 6, so that the positioning holes of the skeleton 91 are sleeved on the corresponding positioning pins 70 of the lower die core 7, and ensure that the lower surface 92 of the skeleton is in contact with the surface of the lower die cavity 6. After that, use the workpiece screw 10 to lock the skeleton 91 into the first lower die core screw hole 71 of the lower die core 7, so that the skeleton 91 is tightly fixed to the lower template 5.

[0034] Lay the solid colloid 90 on the upper surface 93 of the skeleton. Then, the lower template 5 is gradually closed with the upper template 1 from bottom to top along the F direction. Since the upper and lower templates have a certain initial temperature and can maintain the same temperature for a period of time, the solid colloid 90 is heated and becomes a molten semi-solid, filling the entire upper and lower die cavity space under pressure. After a certain time, the rubber vulcanization is completed, and the lower template 5 is demolded along the F1 direction and returns to Figure 4 the position state. The skeleton 91 and the solid colloid 90 are bonded into an integral workpiece 9. Usually, since the rubber compound is in the upper die cavity 2, the entire workpiece 9 will be adsorbed in the upper die cavity 2, making the workpiece taking operation extremely difficult. In this embodiment, a workpiece screw 10 is used to fix the workpiece 9 in the lower die cavity 6, so that the workpiece 9 will not adhere to the upper die cavity 2. The upper die core 3 and the lower die core 7 are respectively locked in the upper template 1 and the lower template 5 through corresponding fastening screws. When the die core is damaged and needs to be replaced, it can be replaced conveniently without affecting the service life of the die and the product quality, saving the cost of processing the die.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mold with replaceable mold cores, comprising an upper template (1), a lower template (5), an upper mold core (3), and a lower mold core (7). The top of the upper mold core (3) is locked in the upper mold receiving portion (20) of the upper template (1) by an upper mold fastening screw (4), and the bottom of the lower mold core (7) is locked in the lower mold receiving portion (60) of the lower template (5) by a lower mold fastening screw (8). It is characterized in that, It also includes a framework (91) and a solid colloid (90). The framework (91) is arranged in the lower die cavity (6) of the lower template (5). The framework (91) is fixedly connected to the lower die core (7) through a positioning hole on the lower surface (92) of the framework and a positioning pin (70) at the top of the lower die core (7). The lower surface (92) of the framework is in contact with the surface of the lower die cavity (6). The framework (91) is also locked into the first lower die core screw hole (71) of the lower die core (7) by a workpiece screw (10). The solid colloid (90) is laid on the upper surface (93) of the framework. The solid colloid (90) is used to become a molten semi-solid after being heated and fill the entire upper and lower die cavity space under pressure. And after die splitting, the framework (91) and the colloid (90) are bonded into an integral workpiece (9). The workpiece screw (10) fixes the workpiece (9) in the lower die cavity (6) so that the workpiece (9) will not adhere to the upper die cavity (2).

2. The mold with replaceable mold core according to claim 1, wherein The upper die core (3) has a first step portion and a second step portion. The first step portion includes the top surface (30) of the upper die core and a first step surface (31). The second step portion includes a second step surface (32), a third step surface (33), a first forming surface (34), a second forming surface (35) and the bottom surface (36) of the upper die core. The second forming surface (35) is conical and has an included angle β, and the angle range is 10 - 18°.

3. The mold with replaceable mold core according to claim 2, characterized in that, The top surface (30) of the upper die core is provided with an upper die core screw hole (301) inward. The upper die core screw hole (301) is used to lock the upper die core (3) in the accommodating portion (20) of the upper template (1) through an upper die fastening screw (4).

4. A mold with replaceable mold cores according to claim 1, characterized in that, The upper die core (3) adopts a rotary body cylindrical structure and includes four outer diameters from top to bottom, which are φa, φb, φc, φd respectively, and φb > φc > φd > φa.

5. A mold with replaceable mold core according to claim 4, characterized in that, The lower end of the upper die core (3) is provided with an upper die core counterbore (302). The upper die core counterbore (302) includes a first counterbore surface (37), a second counterbore surface (38), a third counterbore surface (39) and a fourth counterbore surface (300). The upper die core counterbore (302) has a maximum depth H from the bottom surface (36) of the upper die core to the fourth counterbore surface (300).

6. The mold with replaceable mold core according to claim 5, characterized in that, The first counterbore surface (37) has an inner diameter φe; the third counterbore surface (39) adopts a conical columnar structure. The third counterbore surface (39) has an included angle γ, and the angle range is 10 - 18°. The third counterbore surface (39) has a minimum inner diameter φf and a maximum inner diameter φg.

7. The mold with replaceable mold core according to claim 1, characterized in that, The lower die core (7) adopts a conical columnar structure. The lower die core (7) includes a positioning pin (70) and a lower die core body (78) from top to bottom. The positioning pin (70) has an outer diameter φh. The positioning pin (70) includes a first positioning pin surface (73) and a second positioning pin surface (74). The first positioning pin surface (73) is provided with a first lower die core screw hole (71) inward; The lower die core body (78) includes a first lower die core surface (75), a second lower die core surface (76), and a third lower die core surface (77). The second lower die core surface (76) is conical, the second lower die core surface (76) has an included angle α, and the angle range is 30-36°. The second lower die core surface (76) has a maximum outer diameter φi and a minimum outer diameter φj.

8. A mold with replaceable mold core according to claim 7, characterized in that A second lower die core screw hole (72) is provided on the third lower die core surface (77) from its center inward. The second lower die core screw hole (72) is used to lock the lower die core (7) in the lower die accommodating portion (60) of the lower template (5) through a lower die fastening screw (8).

Images