Bottle cap mold, manufacturing mold and its production process and pulp molded bottle cap

Abstract

This invention provides a bottle cap mold, a manufacturing mold, a production process thereof, and a pulp molded bottle cap. The invention uses pulp to prepare a pulp molded bottle cap with sealing properties. The bottle cap mold includes: a first template, a second template, a fixing structure, a limiting structure, and a displacement structure. The fixing structure is fixed to the first template; the limiting structure cooperates with the fixing structure; the displacement structure cooperates with the limiting structure. When the bottle cap mold is closed, the second template presses in a first direction, driving the displacement structure and the limiting structure to move in the first direction. Simultaneously, the displacement structure is driven to move in both the first and third directions. When the bottle cap mold is opened, the second template returns to its initial position, the limiting structure resets in the second direction, and the displacement structure resets in both the second and fourth directions, thereby automatically demolding the pulp molded bottle cap from the displacement structure.

Description

Technical Field

[0001] This invention relates to the field of pulp molding technology, specifically to bottle cap molds, manufacturing molds and their production processes, and pulp molded bottle caps. Background Technology

[0002] Currently, most containers used for holding liquids are made of plastic bottles and caps. However, plastic is difficult to degrade and easily pollutes the environment. In contrast, paper-plastic packaging containers are made from various fibrous materials, such as bamboo, sugarcane, and wood, which are renewable plants. These materials do not harm the environment or human health and are widely used in the market. The top of the pulp molded bottle cap extends inward to form an interior, which forms an inner seal with the bottle mouth of the pulp molded bottle. The top of the pulp molded bottle cap forms an outer seal with the edge of the bottle mouth. Due to the special structure of the pulp molded bottle cap, the gap between the inner and outer seals is small, and ordinary hot press molds or internal shrink molds on the market cannot achieve automatic demolding. Summary of the Invention

[0003] In view of this, the present invention provides a bottle cap mold, a manufacturing mold and its production process, and a pulp molded bottle cap, which solves the technical problem in the prior art that, due to the special structure of the pulp molded bottle cap and the small gap between the inner and outer seals, ordinary hot press molds or commercially available internal shrink molds cannot achieve automatic demolding when producing pulp molded bottle caps.

[0004] According to a first aspect of the present invention, the present invention provides a mold suitable for pulp molding bottle caps, the bottle cap mold comprising: A first template, a second template, and the first template and the second template are joined together to manufacture pulp molded bottle caps; a fixing structure, the fixing structure is fixed on the first template; a limiting structure, the limiting structure cooperates with the fixing structure; a displacement structure, the displacement structure cooperates with the limiting structure; when the bottle cap mold is opened, the second template is pressed in a first direction, driving the displacement structure and the limiting structure to move in the first direction, and simultaneously driving the displacement structure to move in the first direction and a third direction; when the bottle cap mold is closed, the second template stops pressing in the first direction, the limiting structure resets in the second direction, and the displacement structure resets in the second direction and a fourth direction, thereby causing the pulp molded bottle cap to automatically demold from the displacement structure.

[0005] In one possible implementation, the fixing structure includes: a central column; at least one fixing block, wherein the at least one fixing block is fixedly connected to the central column and is evenly spaced along the length direction of the central column, and one end of the fixing block is provided with a locking block, the width of the locking block being smaller than the width of the fixing block.

[0006] In one possible implementation, the bottle cap mold further includes a power plate disposed above the first template.

[0007] In one possible implementation, the limiting structure includes: a connecting block disposed between every two fixed blocks, the connecting block having an internal hollow structure; a guide post, the guide post being interference-fitted with the connecting block, the end of the guide post away from the connecting block having a first guide platform; a limiting block, the limiting block being slidably connected to the guide post and fixedly connected to the power plate; a first spring, one end of the first spring being disposed inside the connecting block, and the other end of the first spring being disposed on the guide post; and a sliding groove, the sliding groove being formed at the end of the limiting block away from the first spring.

[0008] In one possible implementation, the displacement structure includes: an insert; a slider is provided at one end of the insert facing the limiting block, the slider is slidably connected in the groove, and a second guide platform is provided on the side of the slider near the central column, the first guide platform and the second guide platform are inclined in the same direction; a second spring, one end of the second spring is fixedly connected to the insert, and the other end of the second spring is fixedly connected to the power plate.

[0009] In a second aspect, the present invention provides a manufacturing mold suitable for pulp molded bottle caps, comprising the bottle cap mold described above and a pulp suction mold, wherein one end of the pulp suction mold is connected to a fiber pulp pool and the other end of the pulp suction mold is connected to a vacuum device.

[0010] In a third aspect, the present invention also provides a method for manufacturing a pulp molded bottle cap, wherein a pulp suction mold is placed in pulp slurry, and a pulp suction treatment is performed to obtain a preform of the pulp molded bottle cap; the preform is placed in a bottle cap mold for heat treatment and automatic demolding treatment to obtain the pulp molded bottle cap.

[0011] In one possible implementation, the step of placing the suction mold in the pulp slurry and obtaining the preform of the pulp molded bottle cap after suction treatment further includes: placing the suction mold in the pulp slurry in the pulp tank, the suspended fiber liquid in the pulp tank filling the cavity of the suction mold, and after vacuuming, the water in the suspended fiber liquid flows into the vacuum pipe through the suction hole, while the pulp fibers are adsorbed on the suction cavity to initially form the shape of the pulp molded bottle cap; The step of placing the molded preform in a bottle cap mold for heating and automatic demolding to obtain the pulp molded bottle cap further includes: placing the wet preform into the bottle cap mold for extrusion and shaping, and simultaneously moving the second template towards the first template to close the mold and extrude the water inside the bottle cap to form a pulp molded bottle cap.

[0012] In a fourth aspect, the present invention provides a pulp molded bottle cap, which is obtained using the bottle cap mold described above, or manufactured using the manufacturing mold described above, or manufactured using the manufacturing method described above.

[0013] This invention provides a bottle cap mold, a manufacturing mold, a production process thereof, and a pulp molded bottle cap. The bottle cap mold includes: the bottle cap mold, the manufacturing mold, the production process thereof, and a pulp molded bottle cap. This invention uses pulp to prepare a pulp molded bottle cap with sealing performance. The bottle cap mold includes: a first template, a second template, a fixing structure, a limiting structure, and a displacement structure. The fixing structure is fixed on the first template; the limiting structure cooperates with the fixing structure; the displacement structure cooperates with the limiting structure. When the bottle cap mold is closed, the second template is pressed in a first direction, driving the displacement structure and the limiting structure to move in the first direction. At the same time, the displacement structure is driven to move in the first direction and a third direction. When the bottle cap mold is opened, the second template returns to the starting position, the limiting structure resets in the second direction, and the displacement structure resets in the second direction and a fourth direction, thereby automatically demolding the pulp molded bottle cap from the displacement structure. The pulp molded bottle cap structure prepared by this bottle cap mold and the manufacturing mold has excellent self-sealing effect. Attached Figure Description

[0014] Figure 1 The image shown is a perspective view of a bottle cap mold structure provided in an embodiment of the present invention; Figure 2 The image shown is a cross-sectional view of a bottle cap mold in the closed state according to an embodiment of the present invention; Figure 3 The figure shown is a cross-sectional view of a bottle cap mold in the mold-opening state according to an embodiment of the present invention; Figure 4 The diagram shown is a schematic diagram of the fixing structure and limiting structure of a bottle cap mold structure provided in an embodiment of the present invention; Figure 5 The image shown is an exploded view of a bottle cap mold provided in an embodiment of the present invention; Figure 6 The diagram shown is a structural schematic of a bottle cap mold in the closed state according to an embodiment of the present invention; Figure 7 The diagram shown is a structural schematic of a bottle cap mold in the mold opening state according to an embodiment of the present invention; Figure 8 The diagram shown is a structural schematic of a suction mold provided in an embodiment of the present invention; Figure 9 The diagram shown is a structural schematic of a pulp molded bottle cap provided in an embodiment of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Bottle cap mold; 11. First template; 111. Template slot 12. Second template; 13. Power plate; 14. Fixed structure; 141. Central column; 142. Fixing block; 143. Locking block; 15. Limiting structure; 150. Connecting block; 151. Guide post; 1511. First guide platform; 152. Limiting block; 153. First spring; 154. Slide groove; 16. Displacement structure; 161. Insert; 162. Slider; 1621. Second guide platform; 163. Second spring; 2. Suction mold; 21. Vacuum device; 3. Inner seal; 4. Outer seal. Detailed Implementation

[0016] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiments of this invention are only used to explain the relative positional relationships and movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0017] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Figure 1The image shown is a perspective view of a bottle cap mold structure provided in an embodiment of the present invention; as shown Figure 1 As shown, the bottle cap mold includes: a first template 11; a second template 12, the first template 11 and the second template 12 are joined together to manufacture pulp molded bottle caps; a fixing structure 14, the fixing structure 14 is fixed on the first template 11; a limiting structure 15, the limiting structure 15 cooperates with the fixing structure 14; and a displacement structure 16, the displacement structure 16 cooperates with the limiting structure 15. When the bottle cap mold is closed, the second template 12 is pressed in a first direction, driving the limiting structure 15 to move in the first direction, and simultaneously driving the displacement structure 16 to move in the first direction and in a third direction. When the bottle cap mold is opened, the second template 12 returns to the starting position, the limiting structure 15 resets in the second direction, and the displacement structure 16 resets in the second direction and the fourth direction, thereby automatically demolding the pulp molded bottle cap from the displacement structure 16.

[0020] It should be understood that the first direction in this invention is the direction toward the first template 11 (upward), the second direction is the direction away from the first template 11 (downward), the third direction is the direction toward the center of the displacement structure 16 (inward), and the fourth direction is the direction away from the center of the displacement structure 16 (outward). Specifically, the second template 12 presses upward, the displacement structure 16 and the limiting structure 15 move upward, and at the same time the displacement structure 16 moves outward. When the second template stops pressing and returns to the starting position, the limiting structure 15 resets downward, the displacement structure 16 resets downward, and at the same time the displacement structure 16 also resets inward, so that the pulp molded bottle cap is automatically demolded from the displacement structure 16.

[0021] Figure 2 The figure shown is a cross-sectional view of a bottle cap mold provided in an embodiment of the present invention; Figure 3 The figure shown is a cross-sectional view of a bottle cap mold in the mold-opening state according to an embodiment of the present invention; Figure 4 The diagram shown is a schematic diagram of the fixing structure and limiting structure of a bottle cap mold structure provided in an embodiment of the present invention; Figure 5 The image shown is an exploded view of a bottle cap mold provided in an embodiment of the present invention; Figure 6 The diagram shown is a structural schematic of the closure of the fixing structure and the insert according to an embodiment of the present invention; Figure 7 The diagram shown is a schematic representation of a structure in which the fixing structure and the insert are separated, according to an embodiment of the present invention; as shown... Figures 2-7 As shown, the fixing structure 14 includes: a central column 141; at least one fixing block 142, the at least one fixing block 142 is fixedly connected to the central column 141 and is evenly spaced along the length direction of the central column 141, and a locking block 143 is provided at one end of the fixing block 142, the width of the locking block 143 is smaller than the width of the fixing block 142.

[0022] In a preferred embodiment, the bottle cap mold further includes a power plate 13, which is disposed above the first template 11.

[0023] In a preferred embodiment, the limiting structure includes: a connecting block 150, which is disposed between every two fixed blocks 142, and the connecting block 150 has an internal hollow structure; a guide post 151, which is interference-fitted with the connecting block 150, and a guide platform 1511 is provided at the end of the guide post 151 away from the connecting block 150; a limiting block 152, which is slidably connected to the guide post 151 and fixedly connected to the power plate 13; a first spring 153, one end of which is disposed inside the connecting block 150, and the other end of which is disposed on the guide post 151; and a sliding groove 154, which is formed at the end of the limiting block 152 away from the first spring 153.

[0024] Specifically, the connecting block 150 is interference-fitted with the guide post 151, and the limiting block 152 is slidably connected to the guide post 151. The guide post 151 has a limiting effect on the limiting block 152. When the bottle cap mold is closed, under the action of the second template 12, the limiting block 152 drives the power plate 13 to press upward. The limiting block 152 slides upward along the guide post 151, and the guide post 151 presses the first spring 152. The displacement structure 16 moves between the locking blocks 143 and cooperates with the locking blocks 143 to realize the mold closing. When the bottle cap mold is opened, the second template 12 stops pressing and returns to the starting position. The first spring 152 resets, thereby causing the limiting block 152 to move downward. The connecting block 150 moves downward with the limiting block 152 under the action of gravity. The displacement structure 16 leaves between the locking blocks 143, thereby realizing the opening of the bottle cap mold.

[0025] As a preferred embodiment, the connecting block 150 has an internal hollow structure. One end of the first spring 153 can be fixed to the bottom of the inner surface of the connecting block 150 or placed inside the connecting block 150. As long as one end of the first spring 153 is located inside the internal hollow structure of the connecting block 150, the first spring 153 can be compressed or reset.

[0026] In a preferred embodiment, the end of the guide post 151 near the connecting block 150 can be configured as an internal hollow structure, and the other end of the first spring 153 can be fixed inside the internal hollow structure of the guide post 151 or placed inside the internal hollow structure of the guide post 151.

[0027] As another preferred embodiment, the end of the guide post 151 near the connecting block 150 is a solid structure, and the other end of the first spring 153 can be fixedly connected to the bottom of the guide post 151, and the other end of the first spring 153 can also contact the bottom of the guide post 151.

[0028] In a preferred embodiment, the displacement structure 16 includes: an insert 161; a slider 162 is provided at one end of the insert 161 facing the limiting block 152, the slider 162 is slidably connected in the groove 154, and a second guide platform 1621 is provided at one end of the slider 162 near the central column 141, the first guide platform 1511 and the second guide platform 1621 are inclined in the same direction; a second spring 163, one end of the second spring 163 is fixedly connected to the insert 161, and the other end of the second spring 163 is fixedly connected to the power plate 13.

[0029] Specifically, when the bottle cap mold closes, the second template 12 moves upward to press the insert 161, which in turn presses the limiting block 152 and the guide post 151. The guide post 151 presses the first spring 152. Simultaneously, the second template 12 moves upward to press the insert 161 and then outwards, causing the insert 161 to press the second spring 163, allowing the insert 161 to be inserted between the locking blocks 143, thus achieving mold closure. When the bottle cap mold opens, the second template 12 moves downward back to its starting position, and the first spring 153 resets, allowing the limiting block 152 and the insert 161 to close. 1. Moving downwards, the connecting block 150 moves downwards with the limiting block 152 under the action of gravity, and the locking block 143 moves out from the connection of the insert 161. Since there is no locking block 143 between the inserts 161, a gap is generated between the inserts 161. At the same time, under the action of the second spring 163, due to the gap between the inserts 161, the inserts 161 reset inwards, so that the diameter of the bottle mouth formed by the inserts 161 is smaller than the diameter of the bottle mouth formed by the inserts 161 when the film is closed, thereby realizing the automatic demolding of the pulp molded bottle cap mold.

[0030] In one possible implementation, the first template 11 has a template groove 111, and the fixing structure 14 is fixed in the template groove 111.

[0031] In a second aspect, the present invention provides a manufacturing mold suitable for molded pulp bottle caps, comprising the aforementioned bottle cap mold 1 and a pulp suction mold 2. Figure 7 The diagram shown is a structural schematic of a suction mold provided in an embodiment of the present invention. Figure 7 As shown, one end of the suction mold 2 is connected to the fiber slurry tank, and the other end of the suction mold 2 is connected to the vacuum device 21.

[0032] In a third aspect, the present invention also provides a method for manufacturing a pulp molded bottle cap, wherein a pulp suction mold is placed in pulp slurry, and a pulp suction treatment is performed to obtain a preform of a pulp molded bottle cap; the preform is placed in a bottle cap mold for heat treatment and automatic demolding treatment to obtain a pulp molded bottle cap.

[0033] In one possible implementation, the step of placing the suction mold in the pulp slurry and obtaining the preform of the pulp molded bottle cap after suction treatment further includes: placing the suction mold in the pulp slurry in the pulp tank, the suspended fiber liquid in the pulp tank filling the cavity of the suction mold, and after vacuuming, the water in the suspended fiber liquid flows into the vacuum pipe through the suction hole, while the pulp fibers are adsorbed on the suction cavity to initially form the shape of the pulp molded bottle cap.

[0034] In one possible implementation, the step of placing the preform in a bottle cap mold for heating and automatic demolding to obtain a pulp molded bottle cap further includes: placing the wet preform on the bottle cap mold for extrusion and shaping, and simultaneously moving the second template towards the first template to close the mold and extrude the water inside the bottle cap to form a pulp molded bottle cap.

[0035] In a fourth aspect, the present invention provides a pulp molded bottle cap. Figure 8 The diagram shown is a structural schematic of a pulp molded bottle cap provided in an embodiment of the present invention. Figure 8 As shown, the pulp molded bottle cap is obtained using the above-mentioned bottle cap mold, or manufactured using the above-mentioned manufacturing mold, or manufactured using the above-mentioned manufacturing method. The top of the pulp molded bottle cap extends inward to form an interior, which forms an inner seal 3 with the bottle mouth of the pulp molded bottle, and the top of the pulp molded bottle cap forms an outer seal 4 with the edge of the bottle mouth of the pulp molded bottle.

[0036] Due to the special structure of this pulp molded bottle cap, the gap between the inner seal 3 and the outer seal 4 is small. Ordinary hot press molds or commercially available internal shrink molds cannot achieve automatic demolding. With the bottle cap mold of the present invention, when the mold is closed, the second template 12 moves upward to squeeze the insert 161. The insert 161 squeezes the limiting block 152 and the guide post 151. The guide post 151 squeezes the first spring 152. The second template 12 moves upward to squeeze the insert 161 and moves outward at the same time. The insert 161 squeezes the second spring 163, so that the insert 161 can be inserted between the locking blocks 143, thereby realizing the film closing.

[0037] When the mold is opened, the second template 12 moves downward back to the starting position, the first spring 153 resets, causing the limiting block 152 and the insert 161 to move downward. Under the action of gravity, the connecting block 150 moves downward with the limiting block 152, and the locking block 143 moves out from the connection of the insert 161. Since there is no locking block 143 between the inserts 161, a gap is generated between the inserts 161. At the same time, under the action of the second spring 163, due to the gap between the inserts 161, the inserts 161 reset inward, so that the diameter of the bottle mouth formed by the inserts 161 is smaller than the diameter of the bottle mouth formed by the inserts 161 when the film is closed, thereby realizing the automatic demolding of the pulp molded bottle cap mold.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mold suitable for molding bottle caps from pulp, characterized in that: include: First template (11); second template (12); the first template (11) and the second template (12) are joined together to manufacture pulp molded bottle caps; A fixing structure (14) is fixed to the first template (11); A limiting structure (15) is provided, which cooperates with the fixing structure (14); Displacement structure (16), which cooperates with the limiting structure (15); When the bottle cap mold is closed, the second template (12) presses in the first direction, driving the limiting structure (15) to move in the first direction, and at the same time, driving the displacement structure (16) to move in the first direction and the third direction; when the bottle cap mold is opened, the second template (12) returns to the starting position, the limiting structure (15) resets in the second direction, and the displacement structure (16) resets in the second direction and the fourth direction, so that the pulp molded bottle cap is automatically demolded from the displacement structure (16).

2. The bottle cap mold according to claim 1, characterized in that, The fixing structure (14) includes: Central column (141); A fixing block (142) is fixedly connected to the central column (141) and is evenly spaced along the length of the central column (14). One end of the fixing block (142) is provided with a locking block (143), the width of which is smaller than the width of the fixing block (14).

3. The bottle cap mold according to claim 2, characterized in that, The bottle cap mold also includes a power plate (13), which is positioned above the first template (11).

4. The bottle cap mold according to claim 3, characterized in that, The limiting structure (15) includes: A connecting block (150) is disposed between every two fixed blocks (142), and the connecting block (150) has an internal hollow structure; Guide post (151), the guide post (151) is interference-fitted with the connecting block (150), and a first guide platform (1511) is provided at the end of the guide post (151) away from the connecting block (150). A limiting block (152) is slidably connected to the guide post (151) and fixedly connected to the power plate (13); A first spring (153) is provided at one end inside the connecting block (150), and the other end of the first spring (153) is provided on the guide post (151); A groove (154) is formed at one end of the limiting block (152) away from the first spring (153).

5. The bottle cap mold according to claim 4, characterized in that, The displacement structure (16) includes: An insert (161) is provided with a slider (162) at one end facing the limiting block (152). The slider (162) is slidably connected in the groove (154). A second guide platform (1621) is provided at one end of the slider (162) near the central column (141). The first guide platform (1511) and the second guide platform (1621) are inclined in the same direction. The second spring (163) has one end fixedly connected to the insert (161) and the other end fixedly connected to the power plate (13).

6. The bottle cap mold according to claim 1, characterized in that, The first template (11) has a template groove (111), and the fixing structure (14) is fixed in the template groove (111).

7. A mold suitable for manufacturing pulp molded bottle caps, characterized in that, The device includes a bottle cap mold (1) as described in any one of claims 1-5 and a slurry suction mold (2), one end of which is connected to a fiber slurry pool and the other end of which is connected to a vacuum device (21).

8. A method for manufacturing a pulp molded bottle cap, characterized in that, The pulp suction mold is placed in the pulp slurry, and after the pulp suction process, the preform of the pulp molded bottle cap is obtained; the preform is placed in the bottle cap mold for heat treatment and automatic demolding process to obtain the pulp molded bottle cap.

9. A method for manufacturing a pulp molded bottle cap according to claim 7, characterized in that, The step of placing the suction mold in the pulp slurry and obtaining the molded preform of the pulp molded bottle cap after suction treatment further includes: placing the suction mold in the pulp slurry in the pulp tank, the suspended fiber liquid in the pulp tank filling the cavity of the suction mold, and after vacuuming, the water in the suspended fiber liquid flows into the vacuum pipe through the suction hole, while the pulp fibers are adsorbed on the suction cavity to initially form the shape of the pulp molded bottle cap.

10. A method for manufacturing a pulp molded bottle cap according to claim 7, characterized in that, The step of placing the molded preform in a bottle cap mold for heating and automatic demolding to obtain the pulp molded bottle cap further includes: placing the wet preform into the bottle cap mold for extrusion and shaping, and simultaneously moving the second template towards the first template to close the mold and extrude the water inside the bottle cap to form a pulp molded bottle cap.

11. A pulp molded bottle cap, characterized in that, The pulp molded bottle cap is obtained using a bottle cap mold as described in any one of claims 1-5, a manufacturing mold as described in claim 6, or a manufacturing method as described in any one of claims 7-9. The top of the pulp molded bottle cap extends inward to form an interior, which forms an inner seal (3) with the bottle mouth of the pulp molded bottle, and the top of the pulp molded bottle cap forms an outer seal (4) with the edge of the bottle mouth of the pulp molded bottle.

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