A blister mold of a packaging box with convenient demolding

Abstract

The utility model relates to a blister mould of packing box convenient to demould relates to blister mould technical field, solves the problem of existing technology in demoulding process and easy to cause damage to the formed packing box, increases the percentage of defective products, including upper die holder and the lower die holder of setting in the lower extreme of upper die holder, the inside of upper die holder is provided with coating delivery path, the inside surface of upper die holder evenly is provided with a plurality of spray coating mouth, the lower die holder is provided with a plurality of demoulding air channel, and one end of demoulding air channel is communicated to the forming surface of lower die holder, and the other end is communicated to the bottom of lower die holder, the lower die holder is also provided with a plurality of vacuum air channel, and one end of vacuum air channel is communicated to the forming surface of lower die holder, and the other end is communicated to the bottom of vacuum air channel, the lower die holder is also provided with a plurality of ejector pin hole, and the ejector pin hole is provided with ejector pin assembly, beneficial effect is: can reduce the adhesion between plastic sheet and mould, reduces the percentage of defective products.

Description

Technical Field

[0001] This utility model relates to the field of blister molding technology, specifically to a blister molding mold for packaging boxes that is easy to demold. Background Technology

[0002] In the modern packaging industry, blister packaging is widely used. Blister molds are the key tools for producing blister packaging boxes. They use a specific shape to adhere heated and softened plastic sheets to the surface of the mold. After cooling and solidification, they form a packaging box shape that matches the mold cavity.

[0003] In the actual production process of traditional vacuum forming molds, due to the principle of vacuum forming, the plastic sheet adheres tightly to the mold surface, resulting in a large adhesive force between the two during demolding. This often requires manual assistance for demolding. For some vacuum-formed products with complex shapes and large sizes, even with demolding devices such as ejection mechanisms, multiple operations are still required to completely demold the product, reducing production efficiency. At the same time, during forced demolding, the formed packaging box is easily scratched, deformed, or damaged, greatly increasing the defect rate and production costs. Moreover, during the demolding process, the product may stick to the mold, requiring manual cleaning and handling, which further affects demolding efficiency.

[0004] Therefore, this utility model proposes a vacuum forming mold that facilitates demolding, in order to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a packaging box blister mold that is easy to demold, in order to solve the problem in the prior art that the demolding process can easily damage the formed packaging box and increase the defect rate.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A blister mold for packaging boxes that facilitates demolding includes an upper mold base and a lower mold base disposed at the lower end of the upper mold base. The upper mold base has a coating conveying channel inside, and multiple spray nozzles are evenly distributed on its inner surface, communicating with the coating conveying channel. A feed pipe is connected to the top of the upper mold base corresponding to the coating conveying channel. A sealing strip is connected to the bottom of the upper mold base. The lower mold base has multiple demolding air channels, one end of which is connected to the forming surface of the lower mold base, and the other end to the bottom surface of the lower mold base. The lower mold base also has multiple vacuum channels, one end of which is connected to the forming surface of the lower mold base, and the other end to the bottom surface of the vacuum channel. A vacuum connector is connected to the bottom of the lower mold base corresponding to the vacuum channels. The lower mold base also has multiple ejector pin holes, and ejector pin assemblies pass through these holes.

[0008] Furthermore, a cooling water channel is also provided inside the upper mold base. The cooling water channel is S-shaped and surrounds the coating conveying channel. The inlet and outlet of the cooling water channel are located on the top of the upper mold base.

[0009] Furthermore, a connecting seat is connected to the top of the upper mold base, and the connecting seat has multiple mounting holes, which are waist-shaped holes.

[0010] Furthermore, a sealing groove is provided on the lower mold base corresponding to the position of the sealing strip, a sealing plate is slidably connected in the sealing groove, and a return spring is connected between the sealing plate and the sealing groove.

[0011] Furthermore, a quick-connect fitting is connected to the bottom of the lower mold base corresponding to the demolding air passage, and a one-way valve is provided on the quick-connect fitting.

[0012] Furthermore, the ejector assembly includes an ejector pin and an ejector plate, the ejector plate being connected to one end of the ejector pin, and the ejector plate being connected to a drive mechanism disposed at the bottom of the lower mold base via a slider.

[0013] Furthermore, the driving mechanism includes a drive motor, a lead screw, and a slider. The output shaft of the drive motor is coaxially connected to the lead screw, the lead screw is threadedly connected to the slider, and the slider is connected to the ejector plate.

[0014] In summary, compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting a coating conveying channel and spraying nozzle in the upper mold base, can uniformly spray a release coating on the inner surface of the mold, effectively reducing the adhesion between the plastic sheet and the mold, making demolding simpler, and the ejector pin assembly can quickly eject the formed packaging box, improving the overall production efficiency and greatly reducing the defect rate.

[0016] 2. The sealing strip at the bottom of the upper mold base of this utility model cooperates with the sealing groove of the lower mold base to ensure the sealing of the mold interior, which is conducive to maintaining the vacuum environment during the thermoforming process and improving the molding quality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is the front view of the present invention;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a partial cross-sectional view of the main view of this utility model;

[0021] Figure 5 for Figure 4 A magnified view of part A;

[0022] In the diagram: 1. Upper mold base; 2. Lower mold base; 3. Connecting seat; 4. Mounting hole; 5. Coating conveyor channel; 6. Spray nozzle; 7. Feed pipe; 8. Cooling water channel; 9. Water inlet; 10. Water outlet; 11. Sealing strip; 12. Sealing groove; 13. Sealing plate; 14. Return spring; 15. Demolding air channel; 16. Quick connector; 17. One-way valve; 18. Vacuum air channel; 19. Vacuum connector; 20. Ejector pin hole; 21. Ejector pin; 22. Ejector pin plate; 23. Drive motor; 24. Lead screw; 25. Slider. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0025] like Figure 1-5 As shown, a packaging box blister mold that is easy to demold includes an upper mold base 1 and a lower mold base 2 disposed at the lower end of the upper mold base 1. A connecting seat 3 is connected to the top of the upper mold base 1, and a plurality of mounting holes 4 are provided on the connecting seat 3. The mounting holes 4 are oblong holes.

[0026] Furthermore, the upper mold base 1 is provided with a coating conveying channel 5 inside, and a plurality of spray nozzles 6 are evenly opened on the inner surface of the upper mold base 1. The spray nozzles 6 are connected to the coating conveying channel 5. A feed pipe 7 is connected to the top of the upper mold base 1 corresponding to the coating conveying channel 5. The upper mold base 1 is also provided with a cooling water channel 8, which is S-shaped and surrounds the coating conveying channel 5. The inlet 9 and outlet 10 of the cooling water channel 8 are located on the top of the upper mold base 1. A sealing strip 11 is connected to the bottom of the upper mold base 1, and a sealing groove 12 is opened on the lower mold base 2 corresponding to the sealing strip 11. A sealing plate 13 is slidably connected in the sealing groove 12, and a return spring 14 is connected between the sealing plate 13 and the sealing groove 12.

[0027] Furthermore, the lower mold base 2 has multiple demolding air channels 15, one end of which is connected to the molding surface of the lower mold base 2, and the other end is connected to the bottom surface of the lower mold base 2. A quick-connect fitting 16 is connected to the bottom of the lower mold base 2 corresponding to the demolding air channels 15, and a one-way valve 17 is provided on the quick-connect fitting 16. The lower mold base 2 also has multiple vacuum channels 18, one end of which is connected to the molding surface of the lower mold base 2, and the other end is connected to the bottom surface of the vacuum channel 18. A vacuum connector 19 is connected to the bottom of the lower mold base 2 corresponding to the vacuum channels 18. The lower mold base 2 also has multiple ejector pin holes 20, and ejector pin assemblies pass through the ejector pin holes 20. The ejector pin assembly includes an ejector pin 21 and an ejector pin plate 22. The ejector pin plate 22 is connected to one end of the ejector pin 21, and the ejector pin plate 22 is connected to a drive mechanism located at the bottom of the lower mold base 2 via a slider 25. The driving mechanism includes a drive motor 23, a lead screw 24, and a slider 25. The output shaft of the drive motor 23 is coaxially connected to the lead screw 24. The lead screw 24 is threadedly connected to the slider 25. The slider 25 is connected to the ejector plate 22.

[0028] The working process of this utility model is as follows:

[0029] First, the upper mold base 1 is connected to the external equipment through the waist-shaped mounting hole 4 on the connecting seat 3. The connection position can be adjusted within a certain range, facilitating the installation and positioning of the mold. At the same time, the lower mold base 2 is installed in a suitable position to ensure that the upper mold base 1 and the lower mold base 2 can be accurately matched. Then, liquid materials such as release coating are injected into the coating conveyor channel 5 inside the upper mold base 1 through the feed pipe 7. The liquid material is evenly sprayed onto the surface of the upper mold base 1 through multiple spray nozzles 6 connected to the coating conveyor channel 5. Thus, before vacuum forming, a release coating layer is formed on the inner surface of the mold, reducing the adhesion between the plastic sheet and the mold. After the coating is sprayed, cooling medium is introduced into the inlet 9 of the cooling water channel 8. The cooling medium flows in the S-shaped cooling water channel 8 surrounding the coating conveyor channel 5, cooling the inner surface of the mold and allowing the release coating to dry and solidify quickly.

[0030] The heated and softened plastic sheet is then placed inside the mold. An external vacuum device is connected via vacuum connector 19, creating a vacuum suction force in the vacuum channel 18. This force tightly adheres the plastic sheet to the forming surface of the mold. The upper mold base 1 then moves downwards to close with the lower mold base 2. The sealing strip 11 at the bottom of the upper mold base 1 is embedded in the sealing groove 12 of the lower mold base 2. During mold closing, the sealing plate 13 moves downwards within the sealing groove 12 under the pressure of the upper mold base 1, compressing the return spring 14 and ensuring the mold's internal sealing. The compressed return spring 14 pushes the sealing plate 13 upwards, assisting in the separation of the upper mold base 1 and the lower mold base 2. This completes the vacuum forming process, creating the shape of a packaging box. Cooling medium is then introduced into the inlet 9 of the cooling water channel 8. The cooling medium flows in an S-shape around the coating conveyor channel 5, cooling and shaping the plastic sheet. After molding is completed, an external air source device is connected through the quick-connect connector 16 to allow compressed air to enter the demolding air passage 15, forming an air layer between the molded surface of the mold and the packaging box, reducing the adhesion between the two.

[0031] Then, the drive motor 23 is started. The output shaft of the drive motor 23 drives the lead screw 24 to rotate. The lead screw 24 is threadedly connected to the slider 25. The slider 25 moves along the direction of the lead screw 24 under the rotation of the lead screw 24. The movement of the slider 25 drives the ejector plate 22 to move. The ejector plate 22 drives the ejector pin 21 to move upward through the connecting column. The ejector pin 21 pushes the formed packaging box out from the forming surface of the lower mold base 2, completing the demolding operation.

Claims

1. A blister mold for packaging boxes that is easy to demold, comprising an upper mold base (1) and a lower mold base (2) disposed at the lower end of the upper mold base (1), characterized in that, The upper mold base (1) is provided with a coating conveying channel (5) inside. Multiple spray nozzles (6) are evenly opened on the inner surface of the upper mold base (1). The spray nozzles (6) are connected to the coating conveying channel (5). A feed pipe (7) is connected to the top of the upper mold base (1) corresponding to the coating conveying channel (5). A sealing strip (11) is connected to the bottom of the upper mold base (1). The lower mold base (2) is provided with multiple demolding air channels (15), one end of which is connected to the molding surface of the lower mold base (2) and the other end is connected to the bottom surface of the lower mold base (2); the lower mold base (2) is also provided with multiple vacuum channels (18), one end of which is connected to the molding surface of the lower mold base (2) and the other end is connected to the bottom surface of the vacuum channel (18); a vacuum connector (19) is connected to the bottom of the lower mold base (2) corresponding to the vacuum channel (18); the lower mold base (2) is also provided with multiple ejector pin holes (20), and ejector pin assemblies are inserted into the ejector pin holes (20).

2. The packaging box blister mold for easy demolding according to claim 1, characterized in that, The upper mold base (1) is also provided with a cooling water channel (8), which is S-shaped and surrounds the coating conveying channel (5). The inlet (9) and outlet (10) of the cooling water channel (8) are located on the top of the upper mold base (1).

3. The easy-to-demold packaging box blister mold according to claim 1, characterized in that, The upper mold base (1) is connected to a connecting seat (3) at its top. The connecting seat (3) has multiple mounting holes (4), which are waist-shaped holes.

4. The easy-to-demold packaging box blister mold according to claim 1, characterized in that, The lower mold base (2) has a sealing groove (12) corresponding to the sealing strip (11). A sealing plate (13) is slidably connected in the sealing groove (12). A return spring (14) is connected between the sealing plate (13) and the sealing groove (12).

5. The easy-to-demold packaging box blister mold according to claim 1, characterized in that, The bottom of the lower mold base (2) is connected to the demolding air passage (15) via a quick-connect connector (16), and a one-way valve (17) is provided on the quick-connect connector (16).

6. The easy-to-demold packaging box blister mold according to claim 1, characterized in that, The ejector assembly includes an ejector pin (21) and an ejector plate (22). The ejector plate (22) is connected to one end of the ejector pin (21). The ejector plate (22) is connected to a drive mechanism located at the bottom of the lower mold base (2) via a slider (25).

7. A blister mold for packaging boxes that facilitates demolding according to claim 6, characterized in that, The driving mechanism includes a drive motor (23), a lead screw (24) and a slider (25). The output shaft of the drive motor (23) is coaxially connected to the lead screw (24). The lead screw (24) is threadedly connected to the slider (25). The slider (25) is connected to the ejector plate (22).

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