Mold for inner cap of bottle body

Abstract

The bottle body inner cover mold comprises a lower mold body, a movable part, an inner mold body, an upper mold body, a first connecting rod and a second connecting rod, a movable groove is formed in the upper end of the lower mold body, the movable part comprises a first movable mold body and a second movable mold body, and the first movable mold body and the second movable mold body are both slidably connected to the groove bottom of the movable groove; the sliding direction of the first movable dies is parallel to the sliding direction of the second movable dies, the inner die is fixedly connected to the groove bottom of the movable groove and arranged between the first movable dies and the second movable dies, the upper die, the lower die, the movable parts and the inner die are combined to form a cavity, the multiple movable parts are fixedly connected to the first connecting rod, and the multiple second movable dies are fixedly connected to the second connecting rod. And the plurality of second movable dies are fixedly connected to the second connecting rod. The multiple first movable dies are controlled to slide synchronously through the first connecting rods, the multiple second movable dies are controlled to slide synchronously through the second connecting rods, multiple driving sources do not need to be arranged, the multiple movable parts can be conveniently controlled to move, resource waste is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of inner lid manufacturing, and particularly to a bottle inner lid mold. Background Art

[0002] The inner lid is a key sealing component inside the bottle mouth. It usually forms a double-sealing system with the bottle cap (outer lid) and is widely used in packaging fields such as beverages, food, pharmaceuticals, and cosmetics. Its main functions include enhancing the airtightness of the container (preventing liquid leakage or gas escape), blocking moisture (such as the inner lid of a medicine desiccant), extending the shelf life (such as a vacuum inner plug), and providing an anti-theft function (such as a breakable inner ring). According to the material, it can be divided into types such as polyethylene (PE), polypropylene (PP), silica gel, or thermoplastic elastomer (TPE).

[0003] The bottle inner lid mold is used to produce various plastic or rubber inner lids, and its design directly affects the sealing performance, durability, and production efficiency of the inner lid. The inner lid mold usually adopts injection molding or compression molding processes, including a mold cavity, a mold core, an ejection system, a cooling system, and a runner system, etc. The upper mold, lower mold, and movable mold are combined to form a mold cavity.

[0004] In the demolding stage, it is necessary to precisely control the movement of the movable mold to separate it from the inner lid to avoid scratching or deformation. However, traditional bottle inner lid molds usually adopt a single-cavity design (i.e., one mold for one lid), resulting in only one inner lid being produced per injection, with low production efficiency and difficulty in meeting the demand for large-volume orders. Summary of the Invention

[0005] To improve production efficiency, this application provides a bottle inner lid mold.

[0006] The bottle inner lid mold provided by this application adopts the following technical solutions: A bottle inner lid mold includes a lower mold, a movable member, an inner mold, an upper mold, a first connecting rod, and a second connecting rod. An activity groove is provided at the upper end of the lower mold. The movable member includes a first movable mold and a second movable mold. Both the first movable mold and the second movable mold are slidably connected to the bottom of the activity groove. The sliding directions of the first movable mold and the second sliding mold are parallel to each other. The inner mold is fixedly connected to the bottom of the activity groove and is disposed between the first movable mold and the second movable mold. The upper mold, lower mold, movable member, and inner mold are combined to form a cavity. There are multiple movable members, and multiple first movable molds are all fixedly connected to the first connecting rod, and multiple second movable molds are all fixedly connected to the second connecting rod.

[0007] By adopting the above technical solutions, multiple first movable molds are controlled to slide synchronously through the first connecting rod, and multiple second movable molds are controlled to slide synchronously through the second connecting rod. There is no need to set multiple driving sources, which is convenient for controlling the movement of multiple movable members, reduces resource waste, and improves production efficiency.

[0008] Preferably, the first movable mold includes a first movable block and a first insert, the first movable block is slidably connected to the bottom of the movable groove, the first movable block is provided with a first mounting groove at one end facing the inner mold, the first insert is detachably connected to the bottom of the first mounting groove, a plurality of first mounting grooves are provided, and the plurality of first mounting grooves are evenly spaced along the length direction of the first movable block, a plurality of first inserts are provided, and the first inserts are arranged in a one-to-one correspondence with the first mounting groove, a plurality of the inner mold is provided, and the inner mold is arranged in a one-to-one correspondence with the first insert; the second movable mold includes a second movable block and a second insert, the second movable block is slidably connected to the bottom of the movable groove, the second movable block is provided with a second mounting groove at one end facing the inner mold, the second insert is detachably connected to the bottom of the second mounting groove, a plurality of second mounting grooves are provided, and the second mounting grooves are arranged in a one-to-one correspondence with the first mounting groove, a plurality of second inserts are provided, and the second inserts are arranged in a one-to-one correspondence with the second mounting groove.

[0009] By adopting the above technical solution, it is convenient to control the processing of multiple inner covers at the same time, improve the operating efficiency of the inner cover mold, and improve the production efficiency of the inner cover.

[0010] Preferably, it also includes a guide block, which is fixedly connected to the lower end of the upper mold, and a first guide surface is provided at the end of the first movable block away from the inner mold, and the distance from the first guide surface to the first insert decreases with increasing height; a second guide surface is provided at the end of the second movable block away from the inner mold, and the distance from the second guide surface to the second insert decreases with increasing height; the first guide surface and the second guide surface are both set as inclined surfaces, and the outer wall of the guide block is used to abut the first guide surface and the second guide surface.

[0011] By adopting the above technical solution, when the upper mold approaches the lower mold, the first guide surface and the second guide surface of the guide block push the first movable block and the second movable block to approach the inner mold without using an additional driving source, thereby improving the mold closing efficiency and the production efficiency of the inner cover.

[0012] Preferably, the guide block includes an elastic block, a first abutment plate and a second abutment plate, the lower end of the upper mold is provided with a fixing groove, the elastic block is fixedly connected to the bottom of the fixing groove, the first abutment plate and the second abutment plate are respectively fixedly connected to the outer wall of the elastic block, the first abutment plate is used to abut the ground guide surface, and the second abutment plate is used to abut the second guide surface.

[0013] By adopting the above technical solution, when the upper mold and the lower mold are about to be completely closed, the first movable block and the second movable block complete mutual abutment, reducing the friction between the first movable block and the upper mold. The elastic block is deformed so that the first movable block and the second movable block are tightly abutted, which facilitates the production of the inner cover and improves the production quality.

[0014] Preferably, it further includes a sliding plate and a shape memory alloy. The elastic block is provided with a receiving cavity, and the lower end of the upper mold is provided with an adsorption port. The adsorption port communicates with the receiving cavity. The adsorption port is used for adsorbing the inner cover. The inner wall of the adsorption port is provided with a sliding groove. The sliding plate is slidably connected to the groove wall of the sliding groove. One end of the shape memory alloy is fixedly connected to the bottom of the sliding groove, and the other end of the shape memory alloy is fixedly connected to the sliding plate.

[0015] By adopting the above technical solution, when the mold is not in use, the shape memory alloy shrinks, the adsorption port opens. After the mold is closed, the elastic block deforms, and the liquid in the receiving cavity is discharged from the adsorption port. After the injection liquid enters the cavity, the temperature of the upper mold rises, the shape memory alloy elongates, and the blocking plate covers the adsorption port, so that the injection liquid cannot enter the adsorption port. After injection molding, the temperature of the upper mold drops, the shape memory alloy shrinks, the adsorption port has negative pressure, and the upper mold adsorbs the inner cover to assist demolding and improve the demolding efficiency.

[0016] Preferably, the bottom of the movable groove is provided with a first sliding groove and a second sliding groove. The first connecting rod is slidably embedded in the first sliding groove, and the second connecting rod is slidably embedded in the second sliding groove. The lower mold is provided with a communication port. The communication port communicates with the first sliding groove and the second sliding groove. The outer wall of the first connecting rod is fixedly connected with a first pushing plate, and the outer wall of the second connecting rod is fixedly connected with a second pushing plate. The first pushing plate and the second pushing plate are slidably connected to the inner wall of the communication port.

[0017] By adopting the above technical solution, the first pushing plate and the second pushing plate are arranged in the communication port to limit the first connecting rod and the second connecting rod, prevent the first connecting rod from disengaging from the first sliding groove, prevent the second connecting rod from disengaging from the second sliding groove, and improve the stability of the movement of the first movable mold and the second movable mold.

[0018] Preferably, it further includes an airbag. The outer wall of the inner membrane is provided with a demolding port. The inner membrane is provided with an air cavity. The lower mold is provided with an air duct. The demolding port and the air duct both communicate with the air cavity. The outer wall of the lower mold is provided with an air inlet. The airbag is arranged in the communication port. The airbag is provided with a first airbag port and a second airbag port. The first airbag port is fixedly connected to the inner wall of the air inlet, and the second airbag port is fixedly connected to the inner wall of the air duct. The inner wall of the first airbag port is fixedly connected with a first one-way valve, and the inner wall of the second airbag port is fixedly connected with a second one-way valve. The first pushing plate is arranged on one side of the airbag close to the first movable mold, and the second pushing plate is arranged on one side of the airbag close to the second sliding mold. The first pushing plate and the second pushing plate are used for squeezing the airbag.

[0019] By adopting the above technical solution, when the first movable mold and the second movable mold move away from each other, the first pushing plate and the second pushing plate approach each other, squeeze the airbag, so that the airbag discharges air and the demolding port discharges air, promoting the separation of the inner cover from the inner mold, improving the demolding efficiency and the production efficiency.

[0020] Preferably, a magnetic sheet is fixedly connected to the first guiding surface, and a metal sheet is fixedly connected to the second guiding surface.

[0021] By adopting the above technical solution, when the upper mold and the lower mold are separated, the guiding block moves upward, and the magnetic sheet and the metal sheet attract each other, causing the first movable mold and the second movable mold to move away from each other, realizing automatic control of the approach and separation of the first movable mold and the second movable mold, facilitating the demolding of the inner lid, and improving the production efficiency of the inner lid.

[0022] Preferably, it further includes control members. There are two control members, which are respectively arranged on both sides of the upper mold. Each control member includes a fixed block, a connecting block, and a guiding column. The fixed block is fixedly connected to the outer wall of the upper mold. An inclined groove is provided at the lower end of the fixed block. One connecting block is fixedly connected to the outer wall of the first movable mold, and the other connecting block is fixedly connected to the outer wall of the second movable mold. The guiding column is fixedly connected to the outer wall of the connecting block. The inclined groove is used for the guiding column to slide and be embedded. The distance from the inclined groove to the upper mold decreases as the height increases.

[0023] By adopting the above technical solution, when the upper mold and the lower mold are separated, the inclined groove causes the guiding column to move, and the first movable mold and the second movable mold move away from each other, realizing automatic control of the approach and separation of the first movable mold and the second movable mold, facilitating the demolding of the inner lid, and improving the production efficiency of the inner lid.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By controlling the synchronous sliding of multiple first movable molds through the first connecting rod and controlling the synchronous sliding of multiple second movable molds through the second connecting rod, there is no need to set multiple driving sources, which facilitates the control of the movement of multiple movable parts, reduces resource waste, and improves production efficiency; 2. When the upper mold and the lower mold are about to be fully closed, the first movable block and the second movable block complete mutual abutment, reducing the friction between the first movable block and the upper mold. The elastic block deforms, causing the first movable block and the second movable block to be tightly abutted, facilitating the production of the inner lid and improving the production quality; 3. When the mold is not in use, the shape memory alloy shrinks, the adsorption port opens. After closing the mold, the elastic block deforms, and the liquid in the accommodating cavity drains from the adsorption port. After the injection liquid enters the cavity, the temperature of the upper mold rises, the shape memory alloy elongates, and the sealing plate covers the adsorption port, preventing the injection liquid from entering the adsorption port. After injection molding, the temperature of the upper mold decreases, the shape memory alloy shrinks, the adsorption port is under negative pressure, and the upper mold adsorbs the inner lid, assisting in demolding and improving the demolding efficiency. Description of the Drawings

[0025] Figure 1 It is an overall structural schematic diagram of an inner lid mold for a bottle body.

[0026] Figure 2It is a schematic diagram of the overall structure of the lower mold, the first connecting rod, the second connecting rod, the movable part and the inner mold.

[0027] Figure 3 It is a cross-sectional view of a bottle inner cap mold.

[0028] Figure 4 It is Figure 3 The enlarged view of part A in

[0029] Explanation of reference numerals: 1. Lower mold; 11. Movable groove; 111. First sliding groove; 112. Second sliding groove; 114. Communication port; 115. Air inlet; 2. First connecting rod; 21. First push plate; 3. Second connecting rod; 31. Second push plate; 4. Movable part; 41. First movable mold; 411. First movable block; 4111. First installation groove; 4112. First guiding surface; 4113. Magnetic sheet; 412. First insert block; 42. Second movable mold; 421. Second movable block; 4211. Second installation groove; 4212. Second guiding surface; 4213. Metal sheet; 422. Second insert block; 5. Inner mold; 51. Demolding port; 52. Air cavity; 53. Air passage; 6. Upper mold; 61. Cavity; 62. Fixed groove; 63. Adsorption port; 631. Sliding groove; 7. Movable assembly; 71. Guide block; 711. Elastic block; 7111. Accommodation cavity; 712. First abutting plate; 713. Second abutting plate; 72. Sliding plate; 73. Shape memory alloy; 74. Airbag; 741. First airbag opening; 7411. First one-way valve; 742. Second airbag opening; 7421. Second one-way valve; 75. Thermal expansion and contraction block; 76. Control part; 761. Fixed block; 7611. Inclined groove; 762. Connecting block; 763. Guide post. Detailed implementation manners

[0030] The following further elaborates on this application Figures 1-4 in conjunction with the attached drawings.

[0031] The embodiment of this application discloses a bottle inner cap mold. Refer to Figure 1 and Figure 2 A bottle inner cap mold includes a lower mold 1, a first connecting rod 2, a second connecting rod 3, a movable part 4, an inner mold 5, an upper mold 6 and a movable assembly 7.

[0032] Refer to Figure 2, the upper end of the lower die 1 is provided with movable grooves 11. There are two movable grooves 11, and the two movable grooves 11 are arranged along the length direction of the lower die 1. The length direction of the movable groove 11 is parallel to the width direction of the lower die 1. The bottom of the movable groove 11 is provided with a first chute 111 and a second chute 112. The first connecting rod 2 is slidably embedded in the first chute 111, and the second connecting rod 3 is slidably embedded in the second chute 112. The length direction of the first chute 111 is parallel to the length direction of the movable groove 11, and the length direction of the second chute 112 is parallel to the length direction of the first chute 111.

[0033] The movable member 4 includes a first movable die 41 and a second movable die 42. Both the first movable die 41 and the second movable die 42 are slidably connected to the bottom of the movable groove 11. The sliding direction of the first movable die 41 and the sliding direction of the second movable die 42 are parallel to each other. The inner die 5 is fixedly connected to the bottom of the movable groove 11, and the inner die 5 is arranged between the first movable die 41 and the second movable die 42. There are four movable members 4 in one movable groove 11. There are four first movable dies 41, and the four first movable dies 41 are arranged at intervals along the length direction of the movable groove 11. There are four second movable dies 42, and the second movable dies 42 are arranged in one-to-one correspondence with the first movable dies 41. There is one second movable die 42 between two adjacent first movable dies 41.

[0034] Refer to Figure 2 and Figure 3 , the first movable die 41 includes a first movable block 411 and a first insert block 412. The first movable block 411 is slidably connected to the bottom of the movable groove 11, and the first movable block 411 is fixedly connected to the upper end of the first connecting rod 2. The sliding direction of the first movable block 411 is parallel to the length direction of the movable groove 11, the length direction of the first movable block 411 is parallel to the width direction of the movable groove 11. One end of the first movable block 411 facing the inner die 5 is provided with a first installation groove 4111. The first insert block 412 is detachably connected to the bottom of the first installation groove 4111 by screws. There are four first installation grooves 4111, and the four first installation grooves 4111 are evenly arranged at intervals along the length direction of the first movable block 411. There are four first insert blocks 412, and the first insert blocks 412 are arranged in one-to-one correspondence with the first installation grooves 4111. There are multiple inner dies 5, and the inner dies 5 are arranged in one-to-one correspondence with the first insert blocks 412. The inner membranes 5 are arranged in an array on the lower die 1.

[0035] The second movable mold 42 includes a second movable block 421 and a second insert 422. The second movable block 421 is slidably connected to the bottom of the movable groove 11, and the second movable block 421 is fixedly connected to the upper end of the second connecting rod 3. The second movable block 421 is provided with a second mounting groove 4211 at one end facing the inner mold 5. The second insert 422 is detachably connected to the bottom of the second mounting groove 4211 by screws. There are four second mounting grooves 4211, which are arranged one-to-one with the first mounting grooves 4111. There are four second inserts 422, which are arranged one-to-one with the second mounting grooves 4211. The upper mold 6, the lower mold 1, the movable part 4 and the inner mold 5 are molded together to form a cavity 61.

[0036] Reference Figure 3 A first guide surface 4112 is provided at one end of the first movable block 411 away from the inner mold 5, and the distance from the first guide surface 4112 to the first insert 412 decreases as the height increases. A second guide surface 4212 is provided at one end of the second movable block 421 away from the inner mold 5, and the distance from the second guide surface 4212 to the second insert 422 decreases as the height increases. Both the first guide surface 4112 and the second guide surface 4212 are set as inclined surfaces.

[0037] Reference Figure 1 and Figure 4 The movable assembly 7 includes a guide block 71, a sliding plate 72, a memory alloy 73, an airbag 74, a thermal expansion and contraction block 75 and a control member 76. The guide block 71 includes an elastic block 711, a first abutment plate 712 and a second abutment plate 713. A fixing groove 62 is provided at the lower end of the upper mold 6. The elastic block 711 is fixedly connected to the bottom of the fixing groove 62, and the elastic block 711 extends out of the notch of the fixing groove 62. The length direction of the elastic block 711 is parallel to the width direction of the movable groove 11. The first abutment plate 712 and the second abutment plate 713 are respectively fixedly connected to the outer wall of the elastic block 711. The first abutment plate 712 is parallel to the first guide surface 4112, and the second abutment plate 713 is parallel to the second guide surface 4212. The first abutment plate 712 is used to abut the first guide surface 4112, and the second abutment plate 713 is used to abut the second guide surface 4212. A magnetic sheet 4113 is fixedly connected to the first guide surface 4112 , and a metal sheet 4213 is fixedly connected to the second guide surface 4212 . The magnetic sheet 4113 and the metal sheet 4213 are disposed below the guide block 71 .

[0038] Reference Figure 4, the elastic block 711 is provided with a receiving cavity 7111, the lower end of the upper mold 6 is provided with a suction port 63, the suction port 63 communicates with the receiving cavity 7111 and the cavity 61, the suction port 63 is used for sucking the inner cover, the inner wall of the suction port 63 is provided with a sliding groove 631, a sliding plate 72 is slidably connected to the groove wall of the sliding groove 631, one end of a shape memory alloy 73 is fixedly connected to the bottom of the sliding groove 631, the other end of the shape memory alloy 73 is fixedly connected to the sliding plate 72, the sliding plate 72 is used for covering the suction port 63. When the injection liquid enters the cavity 61 and the ambient temperature rises to the deformation temperature of the shape memory alloy 73, the shape memory alloy 73 deforms and elongates so that the sliding plate 72 covers the suction port 63. When the injection molding is completed and the ambient temperature drops to the deformation temperature of the shape memory alloy 73, the shape memory alloy 73 deforms and contracts so that the sliding plate 72 opens, and the suction port 63 sucks the injection molded part.

[0039] Referring to Figure 2 and Figure 4 , the lower mold 1 is provided with a communication port 114, the communication port 114 is arranged between the first sliding groove 111 and the second sliding groove 112, the communication port 114 is arranged between two adjacent inner molds 5, the communication port 114 communicates with the first sliding groove 111 and the second sliding groove 112. The outer wall of the first connecting rod 2 is fixedly connected with a first push plate 21, the length direction of the first push plate 21 is perpendicular to the length direction of the first connecting rod 2. The outer wall of the second connecting rod 3 is fixedly connected with a second push plate 31, the second push plate 31 is parallel to the first push plate 21, and the first push plate 21 and the second push plate 31 are slidably connected to the inner wall of the communication port 114.

[0040] The outer wall of the inner mold 5 is provided with a demolding port 51, the inner mold 5 is provided with an air cavity 52, the lower mold 1 is provided with an air duct 53, the demolding port 51 and the air duct 53 both communicate with the air cavity 52. The outer wall of the lower mold 1 is provided with an air inlet 115. An airbag 74 is arranged in the communication port 114, the airbag 74 is provided with a first airbag port 741 and a second airbag port 742, the first airbag port 741 is fixedly connected to the inner wall of the air inlet 115, the second airbag port 742 is fixedly connected to the inner wall of the air duct 53. The inner wall of the first airbag port 741 is fixedly connected with a first one-way valve 7411, the inner wall of the second airbag port 742 is fixedly connected with a second one-way valve 7421. The first push plate 21 is arranged on the side of the airbag 74 close to the first movable mold 41, the second push plate 31 is arranged on the side of the airbag 74 close to the second movable mold 42, and the first push plate 21 and the second push plate 31 are used for squeezing the airbag 74. A thermal expansion and contraction block 75 is fixedly connected to the inner wall of the demolding port 51.

[0041] Referring to Figure 1 and Figure 2, there are two control members 76, which are respectively arranged on both sides of the upper mold 6. The control member 76 includes a fixed block 761, a connecting block 762 and a guide post 763. The fixed block 761 is fixedly connected to the outer wall of the upper mold 6. An inclined groove 7611 is provided at the lower end of the fixed block 761. One connecting block 762 is fixedly connected to the outer wall of the outermost first movable block 411, and the other connecting block 762 is fixedly connected to the outer wall of the outermost second movable block 421. The guide post 763 is fixedly connected to the outer wall of the connecting block 762. The inclined groove 7611 is used for the guide post 763 to slide and be embedded. The distance from the inclined groove 7611 to the upper mold 6 decreases as the height increases.

[0042] The implementation principle of the inner cap mold of the bottle body in the embodiment of the present application is as follows: When the mold is not in use, the shape memory alloy 73 shrinks, the adsorption port 63 is opened, the magnetic sheet 4113 adsorbs the metal sheet 4213, and the first movable mold 41 and the second movable mold 42 are away from the inner mold 5. During the process of closing the upper mold 6 and the lower mold 1, the first abutting plate 712 abuts against the first guiding surface 4112, and the second abutting plate 713 abuts against the second guiding surface 4212. The elastic block 711 deforms so that the first movable block 411 and the second movable block 421 are tightly abutted. After closing the mold, a cavity 61 is formed. The adsorption port 63 exhausts air, the airbag 74 inhales air, and the injection liquid enters the cavity 61. The temperature of the cavity 61 rises, the gas pressure in the airbag 74 increases, the shape memory alloy 73 elongates, the sliding plate 72 covers the adsorption port 63, and the injection liquid cannot enter the adsorption port 63. The thermal expansion and contraction block 75 increases in volume to block the demolding port 51. After injection molding, the temperature of the upper mold 6 decreases, the shape memory alloy 73 shrinks, the adsorption port 63 is in negative pressure, the upper mold 6 adsorbs the inner cap, the thermal expansion and contraction block 75 decreases in volume, the demolding port 51 is opened, and during the process of separating the upper mold 6 and the lower mold 1, the control member 76 makes the first movable mold 41 and the second movable mold 42 away from the inner mold 5, and the air top injects the part to realize demolding.

[0043] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A bottle inner cap mold, characterized in that: It includes a lower die (1), a movable part (4), an inner die (5), an upper die (6), a first connecting rod (2) and a second connecting rod (3). An activity groove (11) is provided at the upper end of the lower die (1). The movable part (4) includes a first movable die (41) and a second movable die (42). Both the first movable die (41) and the second movable die (42) are slidably connected to the bottom of the activity groove (11). The sliding direction of the first movable die (41) is parallel to the sliding direction of the second movable die. The inner die (5) is fixedly connected to the bottom of the activity groove (11). The inner die (5) is arranged between the first movable die (41) and the second movable die (42). The upper die (6), the lower die (1), the movable part (4) and the inner die (5) are closed to form a cavity (61). There are multiple movable parts (4). Multiple first movable dies (41) are fixedly connected to the first connecting rod (2), and multiple second movable dies (42) are fixedly connected to the second connecting rod (3).

2. The inner bottle cap mold according to claim 1, characterized in that: The first movable die (41) includes a first movable block (411) and a first insert block (412). The first movable block (411) is slidably connected to the bottom of the activity groove (11). One end of the first movable block (411) facing the inner die (5) is provided with a first installation groove (4111). The first insert block (412) is detachably connected to the bottom of the first installation groove (4111). There are multiple first installation grooves (4111). Multiple first installation grooves (4111) are evenly spaced along the length direction of the first movable block (411). There are multiple first insert blocks (412). The first insert blocks (412) are arranged in one-to-one correspondence with the first installation grooves (4111). There are multiple inner dies (5). The inner dies (5) are arranged in one-to-one correspondence with the first insert blocks (412). The second movable die (42) includes a second movable block (421) and a second insert block (422). The second movable block (421) is slidably connected to the bottom of the activity groove (11). One end of the second movable block (421) facing the inner die (5) is provided with a second installation groove (4211). The second insert block (422) is detachably connected to the bottom of the second installation groove (4211). There are multiple second installation grooves (4211). The second installation grooves (4211) are arranged in one-to-one correspondence with the first installation grooves (4111). There are multiple second insert blocks (422). The second insert blocks (422) are arranged in one-to-one correspondence with the second installation grooves (4211).

3. The inner bottle cap mold according to claim 2, characterized in that: It further includes a guiding block (71), the guiding block (71) is fixedly connected to the lower end of the upper die (6), one end of the first movable block (411) facing away from the inner die (5) is provided with a first guiding surface (4112), the distance from the first guiding surface (4112) to the first insert block (412) decreases as the height increases, one end of the second movable block (421) facing away from the inner die (5) is provided with a second guiding surface (4212), the distance from the second guiding surface (4212) to the second insert block (422) decreases as the height increases, both the first guiding surface (4112) and the second guiding surface (4212) are arranged as inclined surfaces, and the outer wall of the guiding block (71) is used to abut against the first guiding surface (4112) and the second guiding surface (4212).

4. A bottle inner cap mold according to claim 3, characterized in that: The guiding block (71) includes an elastic block (711), a first abutting plate (712) and a second abutting plate (713), the lower end of the upper die (6) is provided with a fixing groove (62), the elastic block (711) is fixedly connected to the bottom of the fixing groove (62), the first abutting plate (712) and the second abutting plate (713) are respectively fixedly connected to the outer wall of the elastic block (711), the first abutting plate (712) is used to abut against the first guiding surface (4112), and the second abutting plate (713) is used to abut against the second guiding surface (4212).

5. A bottle inner cap mold according to claim 4, characterized in that: It further includes a sliding plate (72) and a shape memory alloy (73), the elastic block (711) is provided with a receiving cavity (7111), the lower end of the upper die (6) is provided with an adsorption port (63), the adsorption port (63) communicates with the receiving cavity (7111), the adsorption port (63) is used to adsorb the inner cover, the inner wall of the adsorption port (63) is provided with a sliding groove (631), the sliding plate (72) is slidably connected to the inner wall of the sliding groove (631), one end of the shape memory alloy (73) is fixedly connected to the bottom of the sliding groove (631), and the other end of the shape memory alloy (73) is fixedly connected to the sliding plate (72).

6. The inner bottle cap mold according to claim 5, characterized in that: The bottom of the movable groove (11) is provided with a first sliding groove (111) and a second sliding groove (112), the first connecting rod (2) is slidably embedded in the first sliding groove (111), the second connecting rod (3) is slidably embedded in the second sliding groove (112), the lower die (1) is provided with a communication port (114), the communication port (114) communicates with the first sliding groove (111) and the second sliding groove (112), a first pushing plate (21) is fixedly connected to the outer wall of the first connecting rod (2), a second pushing plate (31) is fixedly connected to the outer wall of the second connecting rod (3), and the first pushing plate (21) and the second pushing plate (31) are slidably connected to the inner wall of the communication port (114).

7. The inner bottle cap mold according to claim 6, characterized in that: It further includes an airbag (74). A demolding port (51) is provided on the outer wall of the inner membrane. The inner membrane is provided with an air cavity (52). The lower mold (1) is provided with an air passage (53). The demolding port (51) and the air passage (53) are both communicated with the air cavity (52). An air inlet (115) is provided on the outer wall of the lower mold (1). The airbag (74) is arranged in the communication port (114). The airbag (74) is provided with a first airbag opening (741) and a second airbag opening (742). The first airbag opening (741) is fixedly connected to the inner wall of the air inlet (115). The second airbag opening (742) is fixedly connected to the inner wall of the air passage (53). A first one-way valve (7411) is fixedly connected to the inner wall of the first airbag opening (741). A second one-way valve (7421) is fixedly connected to the inner wall of the second airbag opening (742). The first push plate (21) is arranged on the side of the airbag (74) close to the first movable mold (41). The second push plate (31) is arranged on the side of the airbag (74) close to the second sliding mold. The first push plate (21) and the second push plate (31) are used to squeeze the airbag (74).

8. A bottle inner cap mold according to claim 3, characterized in that: A magnetic sheet (4113) is fixedly connected to the first guiding surface (4112). A metal sheet (4213) is fixedly connected to the second guiding surface (4212).

9. The inner bottle cap mold according to claim 1, characterized in that: It further includes control members (76). There are two control members (76). The two control members (76) are respectively arranged on both sides of the upper mold (6). The control member (76) includes a fixed block (761), a connecting block (762) and a guiding column (763). The fixed block (761) is fixedly connected to the outer wall of the upper mold (6). An inclined groove (7611) is provided at the lower end of the fixed block (761). One connecting block (762) is fixedly connected to the outer wall of the first movable mold (41). The other connecting block (762) is fixedly connected to the outer wall of the second movable mold (42). The guiding column (763) is fixedly connected to the outer wall of the connecting block (762). The inclined groove (7611) is used for the guiding column (763) to slide and be embedded. The distance from the inclined groove (7611) to the upper mold (6) decreases as the height increases.

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