Demolding mechanism for plastic packaging box plastic suction mold

Abstract

The utility model discloses a demoulding mechanism for a plastic packing box plastic uptake mould, which relates to the technical field of plastic packing box production and comprises a bottom plate, a lower mould seat is connected to the top of the bottom plate, a first electric cylinder and a second electric cylinder are mounted on two sides of the bottom of the lower mould seat, and the output end of the first electric cylinder is connected with a first linkage frame. The output end of the second electric cylinder is connected with a second linkage frame. Through the arrangement of the first electric cylinder, the first linkage frame, the second electric cylinder and the second linkage frame, during demolding, the first electric cylinder and the first linkage frame drive one group of male dies and one group of mounting seats to reciprocate up and down, and the second electric cylinder and the second linkage frame drive the other group of male dies and the other group of mounting seats to reciprocate up and down; the reciprocating up-and-down movement stroke of the male die is gradually increased until the male die can be separated from the plastic packaging box; and sectional type pulling-out is milder, the contact area during pulling-out is reduced, the stress of the plastic package is effectively reduced, and therefore the plastic package box is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic packaging box production, specifically to a demolding mechanism for plastic packaging box blister mold. BACKGROUND

[0002] Blister is a kind of plastic processing technology, and its main principle is that flat plastic hard sheet material is heated to soften, and then vacuum negative pressure is used to make the sheet material deform and adsorb on the surface of the mold, and the processing is completed after the sheet material is cooled and shaped, which is mainly used in the production of plastic packaging and other fields.

[0003] The demolding mechanism of the existing plastic packaging box blister mold is usually a linear motion mechanism that directly drives the punch to move down, thereby separating the punch from the molded plastic to complete the demolding work. However, the plastic packaging box can usually be molded multiple times at a time, and the number of corresponding punch is also relatively large, resulting in a large contact area between the punch and the plastic packaging box. Especially for some plastic packaging with protrusions or concave lines on the surface, the resistance is large when the punch is pulled out of the plastic packaging box directly through the linear motion mechanism. The plastic packaging box is usually low in hardness and has certain toughness, which causes the plastic packaging box to deform. If the force is large, it is easy to cause the plastic packaging box to produce white creases or even tear. The white creases are fatigue damage, which affects the appearance and strength of the plastic packaging box. It results in low yield, which not only causes waste of materials, but also affects delivery time. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a demolding mechanism for plastic packaging box blister mold to solve the technical problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a demolding mechanism for plastic packaging box blister mold, comprising a bottom plate, the bottom plate top is connected with lower die holder, and the lower die holder bottom both sides are equipped with first electric cylinder and second electric cylinder, the first electric cylinder output end is connected with first linkage frame, the second electric cylinder output end is connected with second linkage frame, and the second linkage frame and first linkage frame top are all fixed with mounting seat, the mounting seat bottom middle is equipped with through hole, the mounting seat top is connected with punch, and the punch and mounting seat are placed with sealing pad, the punch inside is equipped with air hole.

[0006] By adopting the above technical solution, during demoulding, the staff operate the first electric cylinder and the second electric cylinder. The first electric cylinder and the first linkage drive a set of punch dies and a set of mounting seats to reciprocate up and down, and the second electric cylinder and the second linkage drive another set of punch dies and another set of mounting seats to reciprocate up and down. The reciprocating up and down movement stroke of the punch die gradually increases until the punch die can be separated from the plastic packaging box. The segmented gradual demoulding is gentler, avoiding excessive force on the plastic packaging box caused by forcibly pulling out the punch die and resulting in creases; and the movement directions of the two sets of punch dies and the two sets of mounting seats are opposite, enabling the two sets of punch dies to alternately perform the pulling work. That is, when one set of punch dies moves down, the other set of punch dies moves up to cooperate with the lower die base to support the plastic packaging box, reducing the contact area when pulling out the punch die, thereby reducing the force on the plastic packaging box and reducing the possibility of creases.

[0007] Further, both the punch die and the mounting seat are slidably connected to the lower die base.

[0008] By adopting the above technical solution, the output ends of the first electric cylinder and the second electric cylinder retract, thereby driving the first linkage and the second linkage to带动 the two sets of mounting seats and the two sets of punch dies to move up, facilitating the lifting of the heated and softened plastic sheet.

[0009] Further, a plurality of mounting seats and punch dies are provided, and the plurality of mounting seats and punch dies are divided into two groups. A plurality of first electric cylinders, first linkages, second electric cylinders and second linkages are provided, and the two sets of mounting seats are respectively fixed to the tops of the plurality of first linkages and second linkages.

[0010] By adopting the above technical solution, the first electric cylinder and the first linkage drive a set of punch dies and a set of mounting seats to reciprocate up and down, and the second electric cylinder and the second linkage drive another set of punch dies and another set of mounting seats to reciprocate up and down.

[0011] Further, the first linkage and the second linkage are交错分布.

[0012] By adopting the above technical solution, the first linkage and the second linkage are交错分布, avoiding structural conflicts that affect the pulling out of the punch die.

[0013] Further, the communication hole is连通 with the air hole.

[0014] By adopting the above technical solution, the vacuum equipment starts to抽真空, the air hole sucks in air and transports it to the vacuum equipment through the communication hole and the hose. During this period, the设置 of the sealing gasket fills the gap between the mounting seat and the punch die to avoid air leakage.

[0015] Further, a plurality of mounting holes are opened on both sides of the bottom of the bottom plate, and the plurality of mounting holes are distributed in a "口" shape.

[0016] By adopting the above technical solution, the base plate is assembled with the vacuum forming equipment through bolts and mounting holes, and the vacuum hose passes through the outer surface of the lower mold base and connects to the bottom of the connecting hole.

[0017] Furthermore, a first bolt is provided between the punch and the mounting base, and the punch is detachably connected to the mounting base via the first bolt.

[0018] By adopting the above technical solution, when it is necessary to replace the punch with a punch of other shapes or to replace the damaged punch, the first bolt is removed to end the limiting of the punch.

[0019] Furthermore, both the bottom of the first linkage frame and the second linkage frame are connected to nuts, and the output ends of the first electric cylinder and the second electric cylinder are threadedly connected to the nuts. The first linkage frame is detachably connected to the first electric cylinder through the nuts, and the second linkage frame is detachably connected to the second electric cylinder through the nuts.

[0020] By adopting the above technical solution, the workers can unscrew the nuts from the output ends of the first and second electric cylinders, which makes it easier for the workers to remove the first linkage frame, the second linkage frame, the mounting base and the punch, so that the first linkage frame, the second linkage frame and the mounting base can be replaced together.

[0021] Furthermore, a second bolt is provided between the base plate and the lower mold base, and the lower mold base is detachably connected to the base plate via the second bolt.

[0022] By adopting the above technical solution, the workers loosen the second bolt to separate the base plate from the lower mold base, which makes it easier for the workers to remove the first linkage frame, the second linkage frame, the mounting base and the punch, so that the first linkage frame, the second linkage frame and the mounting base can be replaced together.

[0023] Furthermore, the punch and the mounting base are coated with a polytetrafluoroethylene coating around their perimeter.

[0024] By adopting the above technical solution, the wear between the punch and the mounting base and the lower die base is reduced and the service life of the structure is extended because the punch and the mounting base are coated with polytetrafluoroethylene.

[0025] In summary, the present invention has the following main advantages:

[0026] 1. This utility model, through the arrangement of a first electric cylinder, a first linkage frame, a second electric cylinder, and a second linkage frame, allows for the following demolding process: during demolding, the first electric cylinder and the first linkage frame drive one set of punches and one set of mounting seats to reciprocate up and down, while the second electric cylinder and the second linkage frame drive another set of punches and another set of mounting seats to reciprocate up and down. The stroke of the punches gradually increases until they can separate from the plastic packaging box. This segmented, gradual demolding is gentler and avoids excessive stress on the plastic packaging box, which can cause creases, if the punches are forcibly pulled out. Furthermore, the two sets of punches and the two sets of mounting seats move in opposite directions, allowing them to alternately pull the punches. As one set of punches moves downward, the other set moves upward, working in conjunction with the lower mold base to support the plastic packaging box, reducing the contact area during punch removal and thus reducing the stress on the plastic packaging box, reducing the possibility of creases. The segmented removal is gentler and reduces the contact area during removal, effectively reducing the stress on the plastic packaging box and thus protecting it.

[0027] 2. By setting up a first linkage frame and a second linkage frame, the first linkage frame and the second linkage frame are staggered to avoid structural conflicts that may affect the extraction of the punch and increase structural stability.

[0028] 3. This utility model, through the setting of mounting base, sealing gasket and connecting hole, the existence of mounting base facilitates the connection of two sets of punches to the first linkage frame and the second linkage frame respectively, the connecting hole facilitates the connection of hose and air hole to form vacuum to form negative pressure for the plastic packaging box to be formed, and the setting of sealing gasket fills the gap between mounting base and punch to prevent air leakage and avoid affecting the molding process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the punch of this utility model;

[0032] Figure 4 This is a schematic diagram of the exploded structure of the first linkage frame of this utility model;

[0033] Figure 5 This is a schematic diagram of the exploded structure of the base plate of this utility model.

[0034] In the diagram: 1. Base plate; 2. Mounting hole; 3. Lower mold base; 4. Punch; 5. Air hole; 6. Sealing gasket; 7. First electric cylinder; 8. First linkage frame; 9. Second electric cylinder; 10. Second linkage frame; 11. Mounting base; 12. Connecting hole; 13. First bolt; 14. Nut; 15. Second bolt. Detailed Implementation

[0035] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0036] The embodiments of the present utility model will be described below according to its overall structure.

[0037] Embodiment 1:

[0038] A demoulding mechanism for a plastic packaging box blister mould, as Figures 1-5 shown, includes a bottom plate 1. A lower die base 3 is connected to the top of the bottom plate 1. Both sides of the bottom of the lower die base 3 are provided with a first electric cylinder 7 and a second electric cylinder 9. The output end of the first electric cylinder 7 is connected to a first linkage 8, and the output end of the second electric cylinder 9 is connected to a second linkage 10. The first linkage 8 and the second linkage 10 are staggered. Mounting seats 11 are fixed to the tops of both the second linkage 10 and the first linkage 8. A punch 4 is connected to the top of the mounting seat 11. There are multiple mounting seats 11 and punches 4, which are divided into two groups. There are multiple first electric cylinders 7, first linkages 8, second electric cylinders 9 and second linkages 10. The two groups of mounting seats 11 are respectively fixed to the tops of the multiple first linkages 8 and second linkages 10. The punches 4 and the mounting seats 11 are both slidably connected to the lower die base 3. A sealing gasket 6 is placed between the punch 4 and the mounting seat 11. An air hole 5 is opened inside the punch 4, and a communication hole 12 is connected to the air hole 5. The staff operates the first electric cylinder 7 and the second electric cylinder 9. The first electric cylinder 7 and the first linkage 8 drive a group of punches 4 and a group of mounting seats 11 to reciprocate up and down, and the second electric cylinder 9 and the second linkage 10 drive another group of punches 4 and another group of mounting seats 11 to reciprocate up and down. The reciprocating up and down movement stroke of the punch 4 gradually increases until the punch 4 can be separated from the plastic packaging box. The segmented and gradual demoulding is gentler, avoiding the plastic packaging box being stressed too much and having creases due to forcibly pulling out the punch 4; and the moving directions of the two groups of punches 4 and the two groups of mounting seats 11 are opposite, enabling the two groups of punches 4 to alternately perform the pulling work. That is, when one group of punches 4 moves down, the other group of punches 4 moves up to cooperate with the lower die base 3 to support the plastic packaging box, reducing the contact area when pulling out the punch 4, thereby reducing the stress on the plastic packaging box and reducing the possibility of creases.

[0039] Refer to Figure 1 、 Figure 2 and Figure 5 , in the above embodiment, multiple mounting holes 2 are opened on both sides of the bottom of the bottom plate 1, and the multiple mounting holes 2 are distributed in a "mouth" shape. A communication hole 12 is opened in the middle of the bottom of the mounting seat 11. The bottom plate 1 is assembled with the blister equipment through bolts and the mounting holes 2, and the hose for vacuum pumping passes through the outer surface of the lower die base 3 and is connected to the bottom of the communication hole 12.

[0040] Example 2:

[0041] Based on the above embodiment one, the following settings are now implemented to reduce wear.

[0042] See Figures 1-5 In the above embodiments, the punch 4 and the mounting base 11 are coated with polytetrafluoroethylene (PTFE) coating. Because the punch 4 and the mounting base 11 are coated with PTFE coating, the wear between the punch 4 and the mounting base 11 and the lower die base 3 is reduced, and the service life of the structure is extended.

[0043] Example 3:

[0044] Based on the above embodiment 1, the following settings are made to facilitate the replacement of the punch 4 and the mounting base 11.

[0045] See Figure 2 , Figure 3 and Figure 5 In the above embodiment, a first bolt 13 is provided between the punch 4 and the mounting base 11. The punch 4 is detachably connected to the mounting base 11 via the first bolt 13. Nuts 14 are connected to the bottom of both the first linkage frame 8 and the second linkage frame 10. The output ends of both the first electric cylinder 7 and the second electric cylinder 9 are threadedly connected to the nuts 14. The first linkage frame 8 is detachably connected to the first electric cylinder 7 via the nuts 14, and the second linkage frame 10 is detachably connected to the second electric cylinder 9 via the nuts 14. A second bolt 15 is provided between the base plate 1 and the lower mold base 3. The lower mold base 3 is detachably connected to the base plate 1 via the second bolt 15. When the structure is damaged, the worker... First, the operator removes the bolts in the mounting hole 2 to remove the demolding mechanism from the vacuum forming machine. Then, the operator loosens the second bolt 15 to separate the base plate 1 from the lower mold base 3. The operator also unscrews the nut 14 from the output ends of the first electric cylinder 7 and the second electric cylinder 9, making it easier for the operator to remove the first linkage frame 8, the second linkage frame 10, the mounting base 11, and the punch 4, so that the first linkage frame 8, the second linkage frame 10, and the mounting base 11 can be replaced together. When it is necessary to replace the punch 4 with another shape or replace the damaged punch 4, the first bolt 13 is removed to stop the limiting of the punch 4. The operation is reversed during installation.

[0046] The implementation principle of this utility model is as follows: First, the base plate 1 is assembled with the vacuum forming equipment through bolts and mounting holes 2, and the vacuum hose passes through the outer surface of the lower mold base 3 and connects to the bottom of the connecting hole 12; during the vacuum forming process, the output ends of the first electric cylinder 7 and the second electric cylinder 9 retract, thereby driving the first linkage frame 8 and the second linkage frame 10 to move the two sets of mounting seats 11 and the two sets of punches 4 upward, so as to lift the heated and softened plastic sheet. Then the vacuum equipment starts to draw in air, the air hole 5 draws in air and delivers it to the vacuum equipment through the connecting hole 12 and the hose. During this period, the sealing gasket 6 is set to fill the gap between the mounting seat 11 and the punches 4 to prevent air leakage. At this time, the plastic sheet is deformed and adheres to the surface of multiple punches 4 under the influence of negative pressure. After the plastic sheet cools and solidifies, the forming work ends.

[0047] During demolding, the operator operates the first electric cylinder 7 and the second electric cylinder 9. The first electric cylinder 7 and the first linkage frame 8 drive a set of punches 4 and a set of mounting seats 11 to move up and down reciprocally. Meanwhile, the second electric cylinder 9 and the second linkage frame 10 drive another set of punches 4 and another set of mounting seats 11 to move up and down reciprocally. The stroke of the punches 4 gradually increases until the punches 4 can be separated from the plastic packaging box. This segmented and gradual demolding is gentler and avoids excessive stress on the plastic packaging box caused by forcibly pulling out the punches 4, which can lead to creases. Furthermore, the two sets of punches 4 and the two sets of mounting seats 11 move in opposite directions, allowing the two sets of punches 4 to alternately pull the plastic packaging box. As one set of punches 4 moves down, the other set moves up to cooperate with the lower mold base 3 to support the plastic packaging box, reducing the contact area when pulling out the punches 4, thereby reducing the stress on the plastic packaging box and reducing the possibility of creases. In addition, since the punches 4 and the mounting seats 11 are coated with polytetrafluoroethylene, the wear between the punches 4 and the mounting seats 11 and the lower mold base 3 is reduced, extending the service life of the structure.

[0048] When the structure is damaged, the worker first removes the bolts in the mounting hole 2 to remove the demolding mechanism from the vacuum forming machine. Then, the worker loosens the second bolt 15 to separate the base plate 1 from the lower mold base 3. The worker then unscrews the nut 14 from the output ends of the first electric cylinder 7 and the second electric cylinder 9, making it easier for the worker to remove the first linkage frame 8, the second linkage frame 10, the mounting base 11, and the punch 4, so that the first linkage frame 8, the second linkage frame 10, and the mounting base 11 can be replaced together. When it is necessary to replace the punch 4 with another shape or replace the damaged punch 4, the first bolt 13 is removed to stop the limiting of the punch 4. The operation is reversed during installation.

[0049] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A demolding mechanism for a blister mold of a plastic packaging box, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is connected with a lower die base (3), and both sides of the bottom of the lower die base (3) are equipped with a first electric cylinder (7) and a second electric cylinder (9). The output end of the first electric cylinder (7) is connected with a first linking frame (8), and the output end of the second electric cylinder (9) is connected with a second linking frame (10). Mounting seats (11) are fixed to the tops of both the second linking frame (10) and the first linking frame (8). A through hole (12) is formed in the middle of the bottom of the mounting seat (11). The top of the mounting seat (11) is connected with a punch (4), and a sealing gasket (6) is placed between the punch (4) and the mounting seat (11). An air hole (5) is formed inside the punch (4).

2. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 1, characterized in that: Both the punch (4) and the mounting seat (11) are slidably connected with the lower die base (3).

3. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 2, characterized in that: Both the mounting seat (11) and the punch (4) are provided in multiple numbers, and the multiple mounting seats (11) and punches (4) are divided into two groups. The first electric cylinder (7), the first linking frame (8), the second electric cylinder (9), and the second linking frame (10) are all provided in multiple numbers, and the two groups of mounting seats (11) are respectively fixed to the tops of the multiple first linking frames (8) and second linking frames (10).

4. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 3, characterized in that: The first linking frame (8) and the second linking frame (10) are staggeredly distributed.

5. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 1, characterized in that: The through hole (12) is communicated with the air hole (5).

6. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 1, characterized in that: Multiple mounting holes (2) are formed on both sides of the bottom of the bottom plate (1), and the multiple mounting holes (2) are distributed in a "mouth" shape.

7. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 1, characterized in that: A first bolt (13) is provided between the punch (4) and the mounting seat (11), and the punch (4) is detachably connected with the mounting seat (11) through the first bolt (13).

8. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 7, characterized in that: Nuts (14) are connected to the bottoms of both the first linking frame (8) and the second linking frame (10), and the output ends of the first electric cylinder (7) and the second electric cylinder (9) are both threadedly connected with the nuts (14). The first linking frame (8) is detachably connected with the first electric cylinder (7) through the nut (14), and the second linking frame (10) is detachably connected with the second electric cylinder (9) through the nut (14).

9. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 1, characterized in that: A second bolt (15) is provided between the bottom plate (1) and the lower die base (3), and the lower die base (3) is detachably connected with the bottom plate (1) through the second bolt (15).

10. The demolding mechanism for a blister mold for plastic packaging boxes according to claim 7, characterized in that: The peripheries of both the punch (4) and the mounting seat (11) are coated with a polytetrafluoroethylene coating.

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