Core mold and capsule mold

Abstract

The utility model discloses a core mold and a capsule mold, which belong to the technical field of rubber vulcanization molds, and comprise an upper core mold, a lower core mold and a lower core mold, the lower core mold is fixedly connected with the upper core mold; a second groove, a second hole and a third hole are formed in the lower core mold; the second groove and the first groove are spliced to form a heating cavity; the third hole is communicated with the heating cavity; the second hole and the first hole are communicated to form a demolding air channel; the core shaft is detachably connected with the lower core mold; a heating medium channel and a gas channel are arranged in the mandrel; the heating medium channel is communicated with the third hole; the gas channel is communicated with the demolding gas channel; the upper core mold and the lower core mold are fixedly connected to form a heating cavity, and the core shaft and the lower core mold are only fixedly connected to form a whole for use, so that the length of the core shaft is shortened, the shapes of the upper core mold and the lower core mold are simpler, the processing, assembling and maintaining difficulty is reduced, and the use quality is improved; the material waste is avoided; and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber vulcanization molds, in particular to a core mold and a capsule mold. Background Art

[0002] The core mold of the existing steam-heated capsule mold, such as Figure 6 As shown, it is usually composed of three parts: an upper core mold, a lower core mold and a core shaft, wherein the upper core mold and the lower core mold are both sleeved on the core shaft, and the upper core mold, the lower core mold and the core shaft are welded to each other to form a whole for use.

[0003] On the one hand, the core mold is a pressure-bearing component. The heating cavity of the core mold needs to withstand a large injection pressure when the heating medium (usually steam) is introduced. Since there are many welds between the upper core mold, the lower core mold and the core shaft, cracks and leaks are prone to occur at the welds, affecting the normal use of the core mold. On the other hand, due to the long length of the core shaft, the processing and assembly are difficult. Moreover, during the use of the core mold, the core shaft and the lower mold shell of the capsule mold need to move relative to each other. If the core shaft is worn and scrapped, the entire core mold needs to be replaced, which increases the production cost.

[0004] Therefore, developing and designing a core mold and capsule mold that can effectively reduce processing, assembly, and maintenance costs and improve use quality is a problem that needs to be solved urgently at this stage. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a core mold and a capsule mold. The upper core mold and the lower core mold are fixedly connected to form a heating chamber, and the core shaft is only fixedly connected to the lower core mold to be used as a whole. The structure of the core mold is reasonably optimized, and the length of the core shaft is effectively shortened. At the same time, the shapes of the upper core mold and the lower core mold are simpler, which reduces the difficulty of processing, assembly and maintenance, improves the quality of use, and reduces the material removal rate during the production process, avoids material waste, and reduces production costs.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] On the one hand, the utility model provides a core mold, comprising:

[0008] An upper core mold, wherein the upper core mold has a first groove and a first hole;

[0009] A lower core mold, wherein the lower core mold is fixedly connected to the upper core mold; the lower core mold is provided with a second groove, a second hole and a third hole; the second groove is spliced ​​with the first groove to form a heating chamber; the third hole is connected with the heating chamber; the second hole is connected with the first hole to form a through demoulding airway;

[0010] A core shaft is detachably connected to the lower core mold; a heating medium channel and a gas channel are provided in the core shaft; the heating medium channel is connected to the third hole; and the gas channel is connected to the demoulding air channel.

[0011] As a preferred technical solution, a connecting groove is provided on the lower core mold, one end of the second hole and one end of the third hole are both located in the connecting groove, and one end of the core shaft is embedded in the connecting groove.

[0012] As a preferred technical solution, a sealing gasket arranged around the third hole is embedded between the core shaft and the lower core mold.

[0013] As a preferred technical solution, a ventilation pipe is provided in the demoulding airway, one end of the ventilation pipe is connected to the first hole, and the other end of the ventilation pipe is connected to the gas channel.

[0014] As a preferred technical solution, a first positioning groove is provided at one end of the first hole close to the core shaft, a second positioning groove is provided at one end of the gas channel close to the upper core mold, and both ends of the ventilation pipe are respectively embedded in the first positioning groove and the second positioning groove.

[0015] As a preferred technical solution, sealing rings are embedded between the outer wall of the ventilation pipe and the side wall of the first positioning groove, and between the outer wall of the ventilation pipe and the side wall of the second positioning groove.

[0016] As a preferred technical solution, the outer ring seam between the lower core mold and the upper core mold is welded;

[0017] And / or, the outer peripheral surfaces of the lower core mold and the upper core mold are both cambered surfaces.

[0018] As a preferred technical solution, the core shaft is fixedly connected to the lower core mold by bolts.

[0019] In a second aspect, the utility model provides a capsule mold, comprising an upper mold shell, a lower mold shell and the aforementioned core mold, wherein the upper mold shell, the lower mold shell and the core mold together form a mold cavity for accommodating a capsule embryo, and the heating cavity is located inside the mold cavity.

[0020] As a preferred technical solution, a limiting countersunk hole is provided on the lower mold shell, a limiting screw is provided in the limiting countersunk hole, and the limiting screw passes through the limiting countersunk hole and is threadedly connected to the lower core mold;

[0021] And / or, the lower mold shell has a through hole for the core shaft to pass through, and a demoulding frame is provided below the core shaft.

[0022] The beneficial effects of the utility model are as follows:

[0023] 1. The upper core mold and the lower core mold of the utility model are fixedly connected to form a heating chamber, and the core shaft is only fixedly connected to the lower core mold to be used as a whole. The structure of the core mold is reasonably optimized, and the length of the core shaft is effectively shortened, while the shapes of the upper core mold and the lower core mold are simpler. The assembly steps between the upper core mold, the lower core mold and the core shaft are simplified, and the difficulty of processing and assembly is reduced. In addition, the material removal rate can be effectively reduced during the production process of the upper core mold, the lower core mold and the core shaft, thereby avoiding material waste and reducing production costs.

[0024] 2. The utility model can directly connect the gas channel with the first hole through the vent pipe arranged in the demoulding airway, thereby preventing the gas from passing through the inner ring seam between the upper core mold and the lower core mold, thereby improving the sealing performance.

[0025] 3. In the utility model, only the upper core mold and the lower core mold are welded, which effectively reduces the number of welds. When the heating medium is introduced into the heating cavity, the risk of cracks and leakage is reduced, the quality of use is improved, and the possibility of core mold maintenance is reduced.

[0026] 4. When the relative movement between the mandrel and the lower mold shell of the utility model causes wear and tear that affects use, the mandrel part can be replaced or repaired separately, which reduces the difficulty and cost of repair and avoids unnecessary waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a core mold of the utility model;

[0028] Figure 2 for Figure 1 A magnified image of area A;

[0029] Figure 3 for Figure 1 A schematic diagram of the structure of the upper core mold and the lower core mold during installation;

[0030] Figure 4 This is a schematic diagram of the overall structure of an embodiment of the capsule mold of the utility model;

[0031] Figure 5 for Figure 4 Schematic diagram of the structure when the mold is opened;

[0032] Figure 6 The figure is a schematic diagram of the structure of the core mold of the existing steam-heated capsule mold.

[0033] In the figure: 1-upper core mold, 11-first groove, 12-first hole, 121-first positioning groove, 2-lower core mold, 21-second groove, 22-second hole, 23-third hole, 24-connecting groove, 3-core shaft, 31-heating medium channel, 32-gas channel, 321-second positioning groove, 4-heating cavity, 5-demolding airway, 6-sealing pad, 7-ventilation pipe, 8-sealing ring, 91-upper mold shell, 92-lower mold shell, 921-limiting countersunk hole, 922-limiting screw, 923-through hole, 93-cavity, 94-demolding frame. DETAILED DESCRIPTION

[0034] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0035] First, please refer to Figure 1-Figure 3 , is an embodiment of a core mold provided by the utility model, comprising an upper core mold 1, a lower core mold 2 and a core shaft 3; the upper core mold 1 has a first groove 11 and a first hole 12, the lower core mold 2 has a second groove 21, a second hole 22 and a third hole 23, after the lower core mold 2 and the upper core mold 1 are spliced ​​and fixedly connected, the second groove 21 is spliced ​​with the first groove 11 to form a heating chamber 4 for accommodating a heating medium; the second hole 22 and the first hole 12 are connected to form a demolding airway 5 that passes through the upper core mold 1 and the lower core mold 2, and when demolding, gas is introduced into the demolding airway 5 to assist in demolding of the capsule; the core shaft 3 is detachably connected to the lower core mold 2, and a heating medium channel 31 and a gas channel 33 are provided in the core shaft 3. Channel 32; the heating medium channel 31 is connected with the heating chamber 4 through the third hole 23, and during vulcanization, the heating medium enters into the heating chamber 4 along the heating medium channel 31 and the third hole 23; the gas channel 32 is connected with the demolding air channel 5, and during demolding, the gas enters into the demolding air channel 5 along the gas channel 32; the utility model greatly shortens the length of the core shaft 3, and makes the shapes of the upper core mold 1 and the lower core mold 2 simpler, simplifies the assembly steps of the upper core mold 1, the lower core mold 2 and the core shaft 3, reduces the difficulty of processing and assembly, and can effectively reduce the material removal rate in the production process of the upper core mold 1, the lower core mold 2 and the core shaft 3, avoids material waste, and reduces production costs.

[0036] For clarification, please refer to Figure 1-Figure 3 The shapes of the lower core mold 2 and the upper core mold 1 are roughly cylindrical, and the outer peripheral surfaces of the lower core mold 2 and the upper core mold 1 are both curved surfaces. The shape of the outer peripheral surface of the lower core mold 2 and the upper core mold 1 after splicing matches the shape of the inner wall surface of the capsule embryo, and can stably support the capsule embryo.

[0037] It should be noted that the heating medium is preferably steam or heat transfer oil.

[0038] In this embodiment, please refer to Figure 1-Figure 3The lower core mold 2 and the upper core mold 1 are fixedly connected by outer ring seam welding. The utility model only has this one weld, which greatly reduces the risk of cracks and leakage during the use of the core mold and improves the quality of use. It should be noted that since the inner ring seam welding between the lower core mold 2 and the upper core mold 1 is inconvenient, a groove can be opened between the inner ring contact surfaces between the lower core mold 2 and the upper core mold 1 and a seal can be placed to improve the sealing of the heating chamber 4.

[0039] In this embodiment, please refer to Figure 1 and Figure 2 The core shaft 3 and the lower core mold 2 are detachably connected by bolt fixing.

[0040] In this embodiment, please refer to Figure 1-Figure 3 A connecting groove 24 is provided on the lower core mold 2, one end of the second hole 22 and the third hole 23 are both located in the connecting groove 24, and one end of the core shaft 3 is embedded in the connecting groove 24, which can improve the connection accuracy and stability between the core shaft 3 and the lower core mold 2 and facilitate installation.

[0041] Based on the above examples, please refer to Figure 1-Figure 3 A sealing gasket 6 arranged around the third hole 23 is embedded between the core shaft 3 and the lower core mold 2. The sealing gasket 6 can effectively ensure the connection and sealing between the third hole 23 and the heating medium channel 31 to avoid leakage of the heating medium.

[0042] In this embodiment, please refer to Figure 1-Figure 3 A vent pipe 7 is provided in the demoulding air duct 5, one end of the vent pipe 7 is connected to the first hole 12, and the other end of the vent pipe 7 is connected to the gas channel 32. The vent pipe 7 can directly connect the demoulding air duct 5 with the first hole 12, and the gas directly enters the first hole 12 through the demoulding air duct 5 and the vent pipe 7 in turn. The vent pipe 7 can not only prevent the gas from passing through the inner circle joint between the first hole 12 and the second hole 22, but also prevent the heating medium from entering the demoulding air duct 5, thereby effectively improving the sealing performance.

[0043] Based on the above examples, please refer to Figure 1-Figure 3 A first positioning groove 121 is provided at one end of the first hole 12 close to the core shaft 3, and a second positioning groove 321 is provided at one end of the gas channel 32 close to the upper core mold 1. The two ends of the ventilation pipe 7 are respectively embedded in the first positioning groove 121 and the second positioning groove 321, and the two ends of the ventilation pipe 7 are respectively abutted against the upper core mold 1 and the core shaft 3. The first positioning groove 121 and the second positioning groove 321 can accurately locate the position of the ventilation pipe 7 and ensure the connection sealing; further, a sealing ring 8 should be embedded between the outer wall of the ventilation pipe 7 and the side wall of the first positioning groove 121, as well as between the outer wall of the ventilation pipe 7 and the side wall of the second positioning groove 321, and the sealing ring 8 can further improve the sealing.

[0044] Please refer to Figure 1-Figure 3 , the specific assembly method of the utility model is as follows:

[0045] Place the upper core mold 1 at the bottom, then place the lower core mold 2 on the upper core mold 1 and splice them, and weld the spliced ​​outer ring seams of the upper core mold 1 and the lower core mold 2; install the sealing element at the third hole 23, and install one end of the ventilation pipe 7 in the first positioning groove 121 of the first hole 12; embed one end of the core shaft 3 into the connecting groove 24 of the lower core mold 2, and make the second positioning groove 321 of the gas channel 32 be sleeved on the other end of the ventilation pipe 7; fix the core shaft 3 to the lower core mold 2 with bolts.

[0046] Second, please refer to Figure 4 and Figure 5 The utility model provides a capsule mold, including an upper mold shell 91, a lower mold shell 92 and the aforementioned core mold. The upper mold shell 91, the lower mold shell 92 and the core mold together form a cavity 93 for accommodating the capsule embryo. The heating cavity 4 is located inside the cavity 93. When a heating medium is introduced into the heating cavity 4, the temperature in the cavity 93 can be increased to realize the vulcanization process of the capsule embryo.

[0047] In this embodiment, please refer to Figure 4 and Figure 5 A limiting countersunk hole 921 is provided on the lower mold shell 92, and a limiting screw 922 is provided in the limiting countersunk hole 921. The limiting screw 922 passes through the limiting countersunk hole 921 and is threadedly connected to the lower core mold 2. The matching of the limiting countersunk hole 921 and the limiting screw 922 can limit the stroke of the core mold relative to the lower mold shell 92, thereby ensuring the normal progress of the vulcanization process.

[0048] In this embodiment, please refer to Figure 4 and Figure 5 The lower mold shell 92 has a through hole 923 for the core shaft 3 to pass through, and a demolding frame 94 is provided below the core shaft 3. When the mold is opened, the demolding frame 94 moves upward and abuts against the core shaft 3, so that the core mold can move upward relative to the lower mold shell 92, which is convenient for capsule demolding.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A core mold, characterized in that: include: An upper core mold (1), wherein the upper core mold (1) has a first groove (11) and a first hole (12); A lower core mold (2), wherein the lower core mold (2) and the upper core mold (1) are fixedly connected; the lower core mold (2) is provided with a second groove (21), a second hole (22) and a third hole (23); the second groove (21) and the first groove (11) are spliced ​​to form a heating chamber (4); the third hole (23) is connected to the heating chamber (4); the second hole (22) and the first hole (12) are connected to form a through demoulding airway (5); A core shaft (3), the core shaft (3) being detachably connected to the lower core mold (2); a heating medium channel (31) and a gas channel (32) are provided in the core shaft (3); the heating medium channel (31) is connected to the third hole (23); and the gas channel (32) is connected to the demoulding gas channel (5).

2. A core mold according to claim 1, characterized in that: The lower core mold (2) is provided with a connecting groove (24), one end of the second hole (22) and the third hole (23) are both located in the connecting groove (24), and one end of the core shaft (3) is embedded in the connecting groove (24).

3. A core mold according to claim 1 or 2, characterized in that: A sealing gasket (6) arranged around the third hole (23) is embedded between the core shaft (3) and the lower core mold (2).

4. A core mold according to claim 1 or 2, characterized in that: A vent pipe (7) is provided in the demoulding airway (5), one end of the vent pipe (7) is in communication with the first hole (12), and the other end of the vent pipe (7) is in communication with the gas channel (32).

5. A core mold according to claim 4, characterized in that: A first positioning groove (121) is provided at one end of the first hole (12) close to the core shaft (3), a second positioning groove (321) is provided at one end of the gas channel (32) close to the upper core mold (1), and two ends of the ventilation pipe (7) are respectively embedded in the first positioning groove (121) and the second positioning groove (321).

6. A core mold according to claim 5, characterized in that: A sealing ring (8) is embedded between the outer wall of the ventilation pipe (7) and the side wall of the first positioning groove (121), and between the outer wall of the ventilation pipe (7) and the side wall of the second positioning groove (321).

7. A core mold according to claim 1, characterized in that: The outer ring seam between the lower core mold (2) and the upper core mold (1) is welded; And / or, the outer peripheral surfaces of the lower core mold (2) and the upper core mold (1) are both curved surfaces.

8. A core mold according to claim 1, characterized in that: The core shaft (3) is fixedly connected to the lower core mold (2) by means of bolts.

9. A capsule mold, characterized in that: It comprises an upper mold shell (91), a lower mold shell (92) and a core mold as described in any one of claims 1 to 8, wherein the upper mold shell (91), the lower mold shell (92) and the core mold together form a mold cavity (93) for accommodating a capsule embryo, and the heating chamber (4) is located inside the mold cavity (93).

10. A capsule mold according to claim 9, characterized in that: The lower mold shell (92) is provided with a limiting countersunk hole (921), and a limiting screw (922) is provided in the limiting countersunk hole (921). The limiting screw (922) passes through the limiting countersunk hole (921) and is threadedly connected to the lower core mold (2); And / or, the lower mold shell (92) has a through hole (923) for the core shaft (3) to pass through, and a demoulding frame (94) is provided below the core shaft (3).

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