Split cavity of thermal forming die

Abstract

The utility model discloses a thermoforming die split cavity which comprises a lower die base and an upper die base, the lower die base comprises a first split female die and a second split female die, the first split female die and the second split female die respectively comprise a first inclined plane, a second inclined plane and a split cavity, the upper die base comprises an upper die plate, and the upper die plate comprises a lower die plate. Driving columns are arranged on the two sides of the lower end face of the upper die plate correspondingly, two sets of first elastic pieces are arranged between the first split female die and the second split female die, and second elastic pieces are arranged on one side of the outer portion of the first split female die and one side of the outer portion of the second split female die correspondingly. The first split female die body and the second split female die body are automatically separated during die opening, the demolding plate is automatically jacked up during die opening, the side face and the bottom of a formed part are separated from the inner wall of the female die body, automatic demolding after die opening is achieved, demolding is convenient, and demolding efficiency is improved; the demolding action is achieved through a mechanical linkage structure, automatic demolding can be achieved without an external power source, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of thermoforming molds, in particular to a split cavity of a thermoforming mold. Background Technique

[0002] A mold includes a male mold and a female mold, which are pre-designed into a specific shape through machining or casting so that a heated sheet can be wrapped or enter these molds to become a product of the same shape. The process of heating a plastic sheet to a certain temperature and then quickly feeding the softened material into a specific mold for forming is called thermoforming.

[0003] Most of the existing thermoforming molds are of an integral structure. When the contact area between the formed part after thermoforming and the cavity is large or the structure is relatively complex, it is difficult to quickly demold the formed product, and the demolding efficiency is low. Content of the Utility Model

[0004] The purpose of the utility model is to provide a split cavity of a thermoforming mold to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A split cavity of a thermoforming mold includes a lower mold base and an upper mold base. The lower mold base includes a first split female mold and a second split female mold. Both the first split female mold and the second split female mold include a first inclined surface, a second inclined surface and a split cavity. The upper mold base includes an upper template. Driving columns are arranged on both sides of the lower end surface of the upper template. Two groups of first elastic members are arranged between the first split female mold and the second split female mold. Second elastic members are arranged on one side of the outside of both the first split female mold and the second split female mold.

[0006] Among them, the first inclined surface is located on the outer side surface of the first split female mold and the second split female mold, and the second inclined surface is located on the inner side surface of the first split female mold and the second split female mold.

[0007] Among them, both the first elastic member and the second elastic member include a sleeve and a sliding rod, and one end of the sliding rod is slidably inserted into the sleeve. A spring is arranged inside the sleeve, one end of the spring is fixed to the bottom inner wall of the sleeve, and the other end of the spring is fixed to the sliding rod.

[0008] Among them, the sliding rod of one side of the second elastic member is fixedly connected to the first split female mold, and the sliding rod of the other side of the second elastic member is fixedly connected to the second split female mold.

[0009] Among them, the sliding rod of the first elastic member is connected to a demolding plate.

[0010] Among them, the demolding plate includes a third inclined surface.

[0011] Among them, a bottom plate is arranged at the lower end of the lower mold base.

[0012] Among them, the sleeves of the first elastic member and the second elastic member are fixedly connected to the bottom plate.

[0013] Among them, the first split female die and the second split female die are both slidably connected to the bottom plate.

[0014] Among them, a fixing frame is provided at the top end of the upper template, a hydraulic cylinder is provided at the top end of the fixing frame, one end of the hydraulic cylinder is connected to the male die, and a connecting shaft is provided on one side of the upper end surface of the upper template.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The first split female die and the second split female die of the present utility model are automatically separated during mold opening, and the stripping plate is automatically lifted during mold opening, separating the side and bottom of the formed part from the inner wall of the female die, realizing automatic demoulding after mold opening, facilitating demoulding, and improving demoulding efficiency.

[0017] 2. The demoulding action of the present utility model is realized by a mechanical linkage structure, and automatic demoulding can be realized without an external power source, with a simple structure. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the mold closing of the lower mold base and the upper mold base of the present utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the top view of the lower mold base and the upper mold base of the present utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the bottom view of the lower mold base and the upper mold base of the present utility model;

[0021] Figure 4 It is a schematic diagram of the working state of the present utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the first elastic member and the second elastic member of the present utility model.

[0023] In the figure: 1. Lower mold base; 11. First split female die; 12. Second split female die; 111. First inclined surface; 112. Second inclined surface; 113. Split cavity; 2. Upper mold base; 21. Upper template; 22. Driving column; 23. Fixing frame; 24. Hydraulic cylinder; 25. Male die; 26. Connecting shaft; 3. First elastic member; 4. Second elastic member; 31. Sleeve; 32. Slide bar; 33. Spring; 34. Stripping plate; 341. Third inclined surface; 5. Bottom plate. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-5 , the present utility model provides a technical solution: a thermoforming die split cavity, including a lower die base 1 and an upper die base 2. The lower die base 1 includes a first split female die 11 and a second split female die 12. Both the first split female die 11 and the second split female die 12 include a first inclined surface 111, a second inclined surface 112, and a split cavity 113. The upper die base 2 includes an upper template 21, and driving columns 22 are arranged on both sides of the lower end surface of the upper template 21. Two groups of first elastic members 3 are arranged between the first split female die 11 and the second split female die 12, and second elastic members 4 are arranged on one side of the outside of the first split female die 11 and the second split female die 12.

[0026] Among them, the first split female die 11 and the second split female die 12 are of a split structure. The first split female die 11 and the second split female die 12 together form the lower die base 1. The split cavity 113 of the first split female die 11 and the split cavity 113 of the second split female die 12 together form a forming cavity.

[0027] Among them, both the first elastic member 3 and the second elastic member 4 have a certain elastic tensile force and elastic resilience.

[0028] Among them, the first inclined surface 111 is located on the outer side of the first split female die 11 and the second split female die 12, and the second inclined surface 112 is located on the inner side of the first split female die 11 and the second split female die 12. The connecting shaft 26 of the upper die base 2 is connected to a hydraulic driving component, and the upper die base 2 is driven to axially move through the hydraulic driving component, so as to realize the mold closing and mold opening actions of the mold.

[0029] Among them, both the first elastic member 3 and the second elastic member 4 include a sleeve 31 and a sliding rod 32, and one end of the sliding rod 32 is slidably inserted into the sleeve 31. A spring 33 is arranged in the sleeve 31, and one end of the spring 33 is fixed to the bottom inner wall of the sleeve 31, and the other end of the spring 33 is fixed to the sliding rod 32. The spring 33 has a certain elastic force, and when the sliding rod 32 is subjected to an external force, it will slide along the sleeve 31, and the spring 33 will correspondingly generate elastic deformation.

[0030] Among them, when the upper die base 2 moves downward under the drive of the hydraulic drive assembly, the two sets of drive columns 22 of the upper template 21 first contact the first inclined surfaces 111 of the first split female die 11 and the second split female die 12 respectively. When the drive columns 22 continue to move downward, an extrusion force is applied to the first inclined surfaces 111, driving the first split female die 11 and the second split female die 12 to approach each other until the mold is closed, and the second elastic member 4 is stretched.

[0031] Among them, during the process of closing the mold of the first split female die 11 and the second split female die 12, the second inclined surfaces 112 of the first split female die 11 and the second split female die 12 apply an extrusion force to the third inclined surface 341 of the stripper plate 34, driving the stripper plate 34 to move downward to avoid, and the first elastic member 3 is compressed.

[0032] Among them, as Figure 4 shown, when the lower die base 1 and the upper die base 2 are closed, the two split cavities 113 form a complete forming cavity, and the stripper plate 34 is driven to the lower part of the forming cavity.

[0033] Among them, the slide bar 32 of the second elastic member 4 on one side is fixedly connected to the first split female die 11, and the slide bar 32 of the second elastic member 4 on the other side is fixedly connected to the second split female die 12. The second elastic member 4 plays a guiding role, enabling the first split female die 11 and the second split female die 12 to move along the axial direction of the slide bar 32.

[0034] Among them, the slide bar 32 of the first elastic member 3 is connected to the stripper plate 34. When the mold is opened, the stripper plate 34 is jacked up under the action of the resilience of the first elastic member 3, applying an external force to the formed part to demold the formed part.

[0035] Among them, the stripper plate 34 includes a third inclined surface 341. When the mold is closed, the second inclined surfaces 112 of the first split female die 11 and the second split female die 12 apply an extrusion force to the third inclined surface 341 of the stripper plate 34, driving the stripper plate 34 to move downward to avoid.

[0036] Among them, as Figure 4 shown, when the mold is opened, the hydraulic drive assembly drives the upper die base 2 to reset, the upper die base 2 drives the drive columns 22 to reset, the external force applied to the lower die base 1 disappears, the first split female die 11 resets under the action of the resilience of the second elastic member 4, the second split female die 12 resets under the action of the resilience of the second elastic member 4, the first split female die 11 and the second split female die 12 are automatically separated, separating the formed part from the inner wall of the female die. When the first split female die 11 and the second split female die 12 are separated and reset, the external force applied to the stripper plate 34 disappears, the stripper plate 34 is jacked up under the action of the resilience of the first elastic member 3, applying an external force to the bottom of the formed part, separating the bottom of the formed part from the inner wall of the female die, so as to realize automatic demolding after the mold is opened.

[0037] Among them, the demolding action is realized by a mechanical linkage structure, and automatic demolding can be achieved without an external power source.

[0038] Among them, a bottom plate 5 is arranged at the lower end of the lower die base 1.

[0039] Among them, the sleeves 31 of the first elastic member 3 and the second elastic member 4 are fixedly connected to the bottom plate 5, and the sleeves 31 of the first elastic member 3 and the second elastic member 4 remain stable and immovable.

[0040] Among them, the first split female die 11 and the second split female die 12 are both slidably connected to the bottom plate 5, and the first split female die 11 and the second split female die 12 can approach or move away from each other under the action of an external force.

[0041] Among them, a fixing frame 23 is arranged at the top end of the upper template 21, a hydraulic cylinder 24 is arranged at the top end of the fixing frame 23, one end of the hydraulic cylinder 24 is connected to the punch 25, and a connecting shaft 26 is arranged on one side of the upper end surface of the upper template 21. During thermoforming, the heated and softened plastic sheet is placed between the lower die base 1 and the upper die base 2. After closing the die, the hydraulic cylinder 24 works to drive the punch 25, and the punch 25 and the split cavity 113 apply pressure to the sheet, so that the sheet fits the cavity to achieve thermoforming of the sheet.

[0042] Working principle: Place the heated and softened plastic sheet between the lower die base 1 and the upper die base 2, and perform mold closing. During mold closing, the hydraulic drive assembly drives the upper die base 2 to move downward. The two sets of drive columns 22 of the upper template 21 first contact the first inclined surfaces 111 of the first split female die 11 and the second split female die 12 respectively. When the drive columns 22 continue to move downward, an extrusion force is applied to the first inclined surfaces 111, driving the first split female die 11 and the second split female die 12 to approach each other until mold closing. The second elastic member 4 is stretched. During the process of mold closing of the first split female die 11 and the second split female die 12, the second inclined surfaces 112 of the first split female die 11 and the second split female die 12 apply an extrusion force to the third inclined surface 341 of the stripper plate 34, driving the stripper plate 34 to move downward to avoid. The first elastic member 3 is compressed. The split cavities 113 of the first split female die 11 and the split cavities 113 of the second split female die 12 together form a molding cavity. The hydraulic cylinder 24 works to drive the punch 25, and the punch 25 applies pressure to the sheet through the split cavities 113, causing the sheet to fit the cavity, realizing the thermoforming of the sheet. After forming, mold opening is performed. The hydraulic drive assembly drives the upper die base 2 to reset, and the upper die base 2 drives the drive columns 22 to reset. The external force applied to the lower die base 1 disappears. The first split female die 11 resets under the action of the restoring force of the second elastic member 4, and the second split female die 12 resets under the action of the restoring force of the second elastic member 4. The first split female die 11 and the second split female die 12 are automatically separated, separating the formed part from the inner wall of the female die. When the first split female die 11 and the second split female die 12 are separated and reset, the external force applied to the stripper plate 34 disappears. The stripper plate 34 is lifted under the action of the restoring force of the first elastic member 3, applying an external force to the bottom of the formed part, separating the bottom of the formed part from the inner wall of the female die, so as to realize automatic demolding after mold opening.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Thermoforming die split cavity, including a lower die base (1) and an upper die base (2), characterized in that: The lower die base (1) includes a first split female die (11) and a second split female die (12). Both the first split female die (11) and the second split female die (12) include a first inclined surface (111), a second inclined surface (112), and a split cavity (113). The upper die base (2) includes an upper template (21). Driving columns (22) are arranged on both sides of the lower end surface of the upper template (21). Two groups of first elastic members (3) are arranged between the first split female die (11) and the second split female die (12). Second elastic members (4) are arranged on one side of the outside of both the first split female die (11) and the second split female die (12).

2. The thermoforming die split cavity according to claim 1, wherein: The first inclined surface (111) is located on the outer side surfaces of the first split female die (11) and the second split female die (12). The second inclined surface (112) is located on the inner side surfaces of the first split female die (11) and the second split female die (12).

3. The thermoforming die split cavity according to claim 1, wherein: Both the first elastic member (3) and the second elastic member (4) include a sleeve (31) and a sliding rod (32). One end of the sliding rod (32) is slidably inserted into the sleeve (31). A spring (33) is arranged inside the sleeve (31). One end of the spring (33) is fixed to the bottom inner wall of the sleeve (31), and the other end of the spring (33) is fixed to the sliding rod (32).

4. The thermoforming die split cavity according to claim 3, wherein: The sliding rod (32) of the second elastic member (4) on one side is fixedly connected to the first split female die (11), and the sliding rod (32) of the second elastic member (4) on the other side is fixedly connected to the second split female die (12).

5. The split cavity of the thermoforming mold according to claim 4, wherein: The sliding rod (32) of the first elastic member (3) is connected to a stripper plate (34).

6. The thermoforming die split cavity according to claim 5, wherein: The stripper plate (34) includes a third inclined surface (341).

7. The thermoforming die split cavity according to claim 6, characterized in that: A bottom plate (5) is arranged at the lower end of the lower die base (1).

8. The split cavity of the thermoforming mold according to claim 7, characterized in that: The sleeves (31) of both the first elastic member (3) and the second elastic member (4) are fixedly connected to the bottom plate (5).

9. The thermoforming die split cavity according to claim 8, wherein: Both the first split female die (11) and the second split female die (12) are slidably connected to the bottom plate (5).

10. The thermoforming die split cavity according to claim 1, characterized in that: A fixing frame (23) is arranged at the top of the upper template (21). A hydraulic cylinder (24) is arranged at the top of the fixing frame (23). One end of the hydraulic cylinder (24) is connected to a punch (25). A connecting shaft (26) is arranged on one side of the upper end surface of the upper template (21).

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