Universal blister mold for paper trays

Abstract

The utility model discloses a kind of paper tray general bubble pressing mould, it is related to packaging material production equipment technical field;Including: bubble pressing top plate, for connecting press;Longitudinal bubble pressing strip, it is provided with two, longitudinally installed in the lower end of the bubble pressing top plate, and the transverse position on the bubble pressing top plate can be adjusted;Transverse bubble pressing strip, it is provided with two, transversely installed in the lower end of the bubble pressing top plate, and the longitudinal position on the bubble pressing top plate can be adjusted;Wherein, two the longitudinal bubble pressing strip and two the transverse bubble pressing strip form enclosed shape.This utility model can be compatible with multiple sizes of paper tray, production change only needs to adjust the position of longitudinal bubble pressing strip and transverse bubble pressing strip, without replacing mould, to reduce the change time, improve production efficiency, and when corresponding product is discontinued, without scrapping, still can continue to use, can reduce mould cost.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging material production equipment, specifically to a general-purpose bubble compression mold for paper trays. Background Technology

[0002] Paper trays are three-dimensional structures with cavities made of paper material, used to provide support, cushioning, and protection in packaging. Due to their environmental friendliness and functionality, they have replaced traditional foamed plastics (such as EPS and EPE) in many fields, and are widely used in food packaging (fast food boxes), medical device packaging, etc. In the production process of paper trays, a foam pressing mold is used to press them into the required shape.

[0003] The existing paper tray bubble wrap molds have fixed dimensions and are dedicated to a single purpose. Furthermore, in production, there are multiple styles of paper trays of the same type (shape), each with different sizes. Therefore, every time a style is changed on the production line, the corresponding bubble wrap mold needs to be replaced, resulting in long changeover times and efficiency losses. Moreover, when an older product is no longer produced, the matching bubble wrap mold must be scrapped, leading to high mold costs. Utility Model Content

[0004] To address the technical problems of high turnover costs and reduced production efficiency caused by the specialization of existing paper tray blister molds for different product models, this utility model provides a universal paper tray blister mold. The positions of the longitudinal and transverse blister strips are adjustable, making it compatible with multiple paper tray sizes. When changing products, only the positions of the longitudinal and transverse blister strips need to be adjusted, without replacing the mold, thereby reducing changeover time and improving production efficiency. Furthermore, when a product model is discontinued, it can still be used without being scrapped, thus reducing mold costs.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model provides a universal bubble pressing mold for paper trays, comprising: a bubble pressing top plate for connecting a press; two longitudinal bubble pressing strips, which are longitudinally installed at the lower end of the bubble pressing top plate and whose lateral position on the bubble pressing top plate is adjustable; and two transverse bubble pressing strips, which are transversely installed at the lower end of the bubble pressing top plate and whose longitudinal position on the bubble pressing top plate is adjustable; wherein the two longitudinal bubble pressing strips and the two transverse bubble pressing strips form a closed shape.

[0007] It should be noted that the existing paper tray bubble wrap molds have fixed dimensions and are dedicated to a single design. Furthermore, in production, there are multiple variations of the same type (shape) of paper tray product, each with different dimensions. Therefore, every time a new design is introduced on the production line, the corresponding paper tray bubble wrap mold needs to be replaced, resulting in lengthy changeover times and reduced efficiency. Moreover, when an older product is no longer in production, the associated paper tray bubble wrap mold must be scrapped, leading to high mold costs.

[0008] In response, the present invention provides a universal bubble pressing mold for paper trays, comprising a top pressing plate, longitudinal bubble pressing strips, and transverse bubble pressing strips. Two longitudinal bubble pressing strips are provided and are longitudinally installed at the lower end of the top pressing plate. The transverse position of the longitudinal bubble pressing strips on the top pressing plate is adjustable. Two transverse bubble pressing strips are provided and are transversely installed at the lower end of the top pressing plate. The longitudinal position of the transverse bubble pressing strips on the top pressing plate is adjustable. The two longitudinal bubble pressing strips and the two transverse bubble pressing strips form a closed shape.

[0009] In use, the top plate of the blister pack is fixed to the working end of the press. According to the required paper tray size, the transverse position of the longitudinal blister pack on the top plate and the longitudinal position of the transverse blister pack on the top plate are adjusted so that the size of the protrusion of the formed paper tray meets the production requirements and thus meets the size requirements of the corresponding style. Since the two longitudinal blister packs and the two transverse blister packs form a closed shape, the press drives the top plate of the blister pack to press down and cooperate with the punch, thereby pressing out the required shape at the corresponding position of the paperboard.

[0010] When producing paper trays of other styles (similar in shape but different in size), simply readjust the lateral position of the longitudinal blister strip on the blister top plate and the longitudinal position of the transverse blister strip on the blister top plate to adapt to the corresponding style, without changing the mold. This reduces changeover time and improves production efficiency. Furthermore, when the corresponding style of product is discontinued, it does not need to be scrapped and can continue to be used, reducing mold costs.

[0011] Therefore, the universal bubble pressing mold for paper trays provided by this utility model can be compatible with multiple sizes of paper trays. When changing production models, only the positions of the longitudinal and transverse bubble pressing strips need to be adjusted, without replacing the mold, thereby reducing changeover time and improving production efficiency. Moreover, when the old model is discontinued, it does not need to be scrapped and can still be used, which can reduce mold costs.

[0012] In an optional embodiment of this application, a cross-shaped frame is provided in the middle of the bubble-pressing top plate to ensure that the bubble-pressing top plate has sufficient structural strength while facilitating the installation and adjustment of the longitudinal and transverse bubble-pressing strips.

[0013] In an optional embodiment of this application, a first magnetic switch is further included. Two first magnetic switches are provided, one at each end of the cross-shaped frame beam, and the first magnetic switches are arranged laterally. The longitudinal bubble pressing strip can be magnetically attracted by the first magnetic switch, so that the longitudinal bubble pressing strip is fixed on the bubble pressing top plate by the magnetic force of the first magnetic switch. The connection between the longitudinal bubble pressing strip and the bubble pressing top plate is controlled by the magnetic switch, so that when the first magnetic switch is open, the position of the longitudinal bubble pressing strip in the lateral direction of the bubble pressing top plate can be adjusted, which facilitates quick adjustment of the position of the longitudinal bubble pressing strip.

[0014] In an optional embodiment of this application, the longitudinal bubble pressing strip includes a longitudinal inner strip, which is made of a magnetically attractive material. The longitudinal inner strip is covered with a first rubber sleeve to ensure that the longitudinal bubble pressing strip can be attracted by a first magnetic switch. At the same time, the rubber sleeve covering the longitudinal inner strip can protect the paperboard through the flexibility of the rubber sleeve, so as to effectively avoid scratching the paper tray when the longitudinal bubble pressing strip is pressing bubbles.

[0015] In an optional embodiment of this application, the first magnetic switch includes: two first magnetic conductors spaced apart and disposed on the cross frame; a first permanent magnet disposed between the two first magnetic conductors and capable of rotating along a preset axis; and a first knob connected to the first permanent magnet for driving the first permanent magnet to rotate; wherein, when the first permanent magnet rotates to the point where its two poles are directly opposite the corresponding first magnetic conductors, the first magnetic conductors attract the longitudinal bubble bar to the top plate of the bubble press.

[0016] In an optional embodiment of this application, the first magnetic switch further includes a magnetic shielding pad, which is sandwiched between the two first magnetic conductors.

[0017] In an optional embodiment of this application, a second magnetic switch is further included. Two second magnetic switches are provided, one at each end of the longitudinal beam of the cross-shaped frame, and arranged longitudinally. The transverse bubble-pressing strip can be magnetically attracted by the second magnetic switches, thereby fixing the transverse bubble-pressing strip to the top plate through the magnetic force of the second magnetic switches. The connection between the transverse bubble-pressing strip and the top plate is controlled by the magnetic switches, thereby adjusting the longitudinal position of the transverse bubble-pressing strip on the top plate when the second magnetic switch is open, facilitating rapid adjustment of the transverse bubble-pressing strip's position.

[0018] In an optional embodiment of this application, the transverse bubble pressing strip includes a transverse inner strip, which is made of a magnetically attractive material. The transverse inner strip is covered with a second rubber sleeve to ensure that the transverse bubble pressing strip can be attracted by a second magnetic switch. At the same time, the rubber sleeve covering the transverse inner strip can protect the cardboard through the flexibility of the rubber sleeve, so as to effectively avoid scratching the paper tray when the transverse bubble pressing strip is pressing bubbles.

[0019] In an optional embodiment of this application, the structure of the second magnetic switch is the same as that of the first magnetic switch.

[0020] In an optional embodiment of this application, the top plate of the bubble press is made of a magnetic material. When the magnetic switch is turned on, the top plate of the bubble press is magnetized, thereby improving the stability of the bubble press strip being attracted.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] 1. The universal bubble pressing mold for paper trays provided by this utility model includes a bubble pressing top plate, longitudinal bubble pressing strips, and transverse bubble pressing strips. Two longitudinal bubble pressing strips are provided and installed longitudinally at the lower end of the bubble pressing top plate. The transverse position of the longitudinal bubble pressing strips on the bubble pressing top plate is adjustable. Two transverse bubble pressing strips are provided and installed transversely at the lower end of the bubble pressing top plate. The longitudinal position of the transverse bubble pressing strips on the bubble pressing top plate is adjustable. At the same time, the two longitudinal bubble pressing strips and the two transverse bubble pressing strips form a closed shape. By simply adjusting the transverse position of the longitudinal bubble pressing strips on the bubble pressing top plate and adjusting the longitudinal position of the transverse bubble pressing strips on the bubble pressing top plate, it can be adapted to the corresponding style without changing the mold, thereby reducing the style change time and improving production efficiency.

[0023] 2. The universal bubble pressing mold for paper trays provided by this utility model can adjust both the transverse position of the longitudinal bubble pressing strip on the top plate and the longitudinal position of the transverse bubble pressing strip on the top plate. It can be compatible with multiple sizes of paper trays. When the corresponding product is discontinued, it can still be used without being scrapped, which can reduce the mold cost. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] In the attached diagram:

[0026] Figure 1 A three-dimensional structural schematic diagram of the universal bubble compression mold for paper trays provided in an embodiment of this utility model;

[0027] Figure 2 A three-dimensional structural diagram of the universal bubble-pressing mold for paper trays after being flipped up, provided in an embodiment of this utility model;

[0028] Figure 3 A top view of the general-purpose bubble compression mold for paper trays provided in this embodiment of the utility model;

[0029] Figure 4 A side view of the general-purpose bubble compression mold for paper trays provided in this embodiment of the utility model;

[0030] Figure 5 A cross-sectional view of the first magnetic switch provided in an embodiment of this utility model;

[0031] Figure 6 A schematic diagram of a paper tray model applicable to the universal bubble pressing mold provided in this embodiment of the utility model.

[0032] The attached diagram shows the markings and corresponding component names:

[0033] 10-Pressed foam top panel, 11-Cross frame, 12-Frame;

[0034] 20 - Longitudinal blister strip, 21 - Longitudinal inner strip, 22 - First rubber sleeve;

[0035] 30 - Transverse bubble strip, 31 - Transverse inner strip, 32 - Second rubber sleeve;

[0036] 40-First magnetic switch, 41-First magnetic conductor, 42-First permanent magnet, 43-First knob, 44-Magnetic shielding pad;

[0037] 50 - Second magnetic switch. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] In the description of this application, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] It should be noted that the existing paper tray bubble wrap molds have fixed dimensions and are dedicated to a single design. Furthermore, in production, there are multiple variations of the same type (shape) of paper tray product, each with different dimensions. Therefore, every time a new design is introduced on the production line, the corresponding paper tray bubble wrap mold needs to be replaced, resulting in lengthy changeover times and reduced efficiency. Moreover, when an older product is no longer in production, the associated paper tray bubble wrap mold must be scrapped, leading to high mold costs.

[0044] In response, the inventor has innovatively designed the following technical solution, and the specific implementation scheme of this application will be described in detail below with reference to the accompanying drawings.

[0045] Example

[0046] Combination Figure 1 This embodiment provides a universal bubble pressing mold for paper trays, including: a bubble pressing top plate 10 for connecting a press; two longitudinal bubble pressing strips 20, which are longitudinally installed at the lower end of the bubble pressing top plate 10 and whose lateral position on the bubble pressing top plate 10 is adjustable; and two transverse bubble pressing strips 30, which are transversely installed at the lower end of the bubble pressing top plate 10 and whose longitudinal position on the bubble pressing top plate 10 is adjustable; wherein the two longitudinal bubble pressing strips 20 and the two transverse bubble pressing strips 30 form a closed shape.

[0047] Combination Figures 1-3 In this embodiment, a cross frame 11 is provided in the middle of the bubble pressing top plate 10, and a frame 12 is connected to the outside of the cross frame 11 to ensure that the bubble pressing top plate 10 has sufficient structural strength while facilitating the installation and adjustment of the longitudinal bubble pressing strip 20 and the transverse bubble pressing strip 30.

[0048] Combined again Figures 1-3 It is understandable that the two longitudinal bubble-pressing strips 20 and the two transverse bubble-pressing strips 30 are staggered, and one end of one bubble-pressing strip abuts against the side wall of one end of another bubble-pressing strip, thus forming a closed shape. Even after each bubble-pressing strip moves, it can still form a closed shape and does not interfere with each other.

[0049] The positions of the longitudinal bubble pressing strip 20 and the transverse bubble pressing strip 30 can be adjusted by setting a linear adjustment mechanism on the bubble pressing top plate 10, such as a screw-slider mechanism, an electric actuator / pneumatic cylinder pushing mechanism, etc., using linear drive. Alternatively, multiple bolt holes can be provided on the bubble pressing top plate 10, allowing connecting bolts to pass through the corresponding bolt holes to install the corresponding longitudinal bubble pressing strip 20 and transverse bubble pressing strip 30 in their respective positions on the bubble pressing top plate 10 for adjustment. Other detachable connection methods can also be used. In this embodiment, both the longitudinal bubble pressing strip 20 and the transverse bubble pressing strip 30 are fixed by a magnetic switch (magnetic base). Specifically:

[0050] Combination Figures 1-4 This embodiment also includes a first magnetic switch 40. Two first magnetic switches 40 are provided, one at each end of the crossbeam of the cross frame 11, and the first magnetic switches 40 are arranged horizontally. The longitudinal bubble pressing strip 20 can be magnetically attracted by the first magnetic switch 40, so that the longitudinal bubble pressing strip 20 is fixed on the bubble pressing top plate 10 by the magnetic force of the first magnetic switch 40. The connection between the longitudinal bubble pressing strip 20 and the bubble pressing top plate 10 is controlled by the magnetic switch. Thus, when the first magnetic switch 40 is open, the position of the longitudinal bubble pressing strip 20 in the horizontal direction of the bubble pressing top plate 10 can be adjusted, which facilitates quick adjustment of the position of the longitudinal bubble pressing strip 20.

[0051] The longitudinal blister strip 20 includes a longitudinal inner strip 21 made of a magnetically pleasing material. The longitudinal inner strip 21 is covered by a first adhesive sleeve 22 to ensure that the longitudinal blister strip 20 can be attracted by the first magnetic switch 40. Simultaneously, the adhesive sleeve protects the cardboard during blister pressing, effectively preventing scratches on the paper tray. Alternatively, the longitudinal blister strip 20 can be made directly from a magnetically pleasing material.

[0052] Combination Figure 5Specifically, the first magnetic switch 40 includes: two first magnetic conductors 41, spaced apart, disposed on the cross frame 11; a first permanent magnet 42, disposed between the two first magnetic conductors 41, and capable of rotating along a preset axis; and a first knob 43, connected to the first permanent magnet 42, used to drive the first permanent magnet 42 to rotate; wherein, when the first permanent magnet 42 rotates to the point where its two poles are directly opposite the corresponding first magnetic conductors 41, the first magnetic conductors 41 attract the longitudinal bubble bar 20 to the bubble top plate 10.

[0053] It should be understood that the first magnetic switch 40 also includes a magnetic shielding pad 44, which is sandwiched between the two first magnetic conductors 41.

[0054] Accordingly, this embodiment also includes a second magnetic switch 50. Two second magnetic switches 50 are provided, one at each end of the longitudinal beam of the cross frame 11, and arranged longitudinally. The transverse bubble pressing strip 30 can be magnetically attracted by the second magnetic switches 50, thus fixing it to the bubble pressing top plate 10 using the magnetic force of the second magnetic switches 50. The connection between the transverse bubble pressing strip 30 and the bubble pressing top plate 10 is controlled by the magnetic switches. Therefore, when the second magnetic switches 50 are open, the longitudinal position of the transverse bubble pressing strip 30 on the bubble pressing top plate 10 can be adjusted, facilitating rapid adjustment of the transverse bubble pressing strip 30's position.

[0055] Similarly, the transverse bubble pressing strip 30 includes a transverse inner strip 31, which is made of a magnetic material. The transverse inner strip 31 is covered with a second rubber sleeve 32 to ensure that the transverse bubble pressing strip 30 can be attracted by the second magnetic switch 50. At the same time, the rubber sleeve covering the transverse inner strip 31 can protect the cardboard through the flexibility of the rubber sleeve, so as to effectively avoid scratching the paper tray when the transverse bubble pressing strip 30 is pressing bubbles.

[0056] In this embodiment, the structure of the second magnetic switch 50 is the same as that of the first magnetic switch 40.

[0057] Based on this, the top plate 10 of the bubble pressing is made of magnetic material. When the magnetic switch is turned on, the top plate 10 of the bubble pressing is magnetized, which improves the stability of the bubble pressing strip being attracted. At the same time, when the magnetic switch is turned on, it can also directly attract itself to the top plate 10 of the bubble pressing.

[0058] In summary, the universal bubble pressing mold for paper trays provided in this embodiment includes a bubble pressing top plate 10, longitudinal bubble pressing strips 20, and transverse bubble pressing strips 30. Two longitudinal bubble pressing strips 20 are provided and are longitudinally installed at the lower end of the bubble pressing top plate 10 via a first magnetic switch 40. The transverse position of the longitudinal bubble pressing strips 20 on the bubble pressing top plate 10 is adjustable. Two transverse bubble pressing strips 30 are provided and are transversely installed at the lower end of the bubble pressing top plate 10 via a second magnetic switch 50. The longitudinal position of the transverse bubble pressing strips 30 on the bubble pressing top plate 10 is adjustable. At the same time, the two longitudinal bubble pressing strips 20 and the two transverse bubble pressing strips 30 form a closed shape.

[0059] In use, the top plate 10 is fixed to the working end of the press. According to the required paper tray size, the first magnetic switch and the second magnetic switch 50 are opened. The lateral position of the longitudinal blister strip 20 on the top plate 10 and the longitudinal position of the transverse blister strip 30 on the top plate 10 are adjusted. Then, the first magnetic switch 40 and the second magnetic switch 50 are closed. This ensures that the size of the paper tray protrusion formed by the longitudinal and transverse blister strips 20 meets production requirements and conforms to the size requirements of the corresponding style. Since the two longitudinal blister strips 20 and the two transverse blister strips 30 form a closed shape, the press drives the top plate 10 to press down and cooperate with the punch, thereby pressing out the required shape at the corresponding position on the paperboard. Figure 6 ).

[0060] When other styles of paper trays (similar in shape but different in size) need to be produced, simply readjust the lateral position of the longitudinal blister strip 20 on the blister top plate 10 and the longitudinal position of the transverse blister strip 30 on the blister top plate 10 to adapt to the corresponding style, without changing the mold, thereby reducing changeover time and improving production efficiency. Furthermore, when the corresponding style of product is discontinued, it does not need to be scrapped and can continue to be used, reducing mold costs.

[0061] In summary, the universal blister mold for paper trays provided in this embodiment is compatible with multiple sizes of paper trays. When changing production models, only the positions of the longitudinal blister strip 20 and the transverse blister strip 30 need to be adjusted, without replacing the mold, thereby reducing changeover time and improving production efficiency. Furthermore, when the old model is discontinued, it does not need to be scrapped and can still be used, which can reduce mold costs.

[0062] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A universal bubble compression mold for paper trays, characterized in that, include: The top plate (10) is used to connect the press; Two longitudinal bubble strips (20) are provided, which are installed longitudinally at the lower end of the bubble top plate (10) and whose lateral position on the bubble top plate (10) can be adjusted. Two transverse bubble strips (30) are provided, which are installed transversely at the lower end of the bubble top plate (10), and their longitudinal position on the bubble top plate (10) can be adjusted. The two longitudinal bubble bars (20) and the two transverse bubble bars (30) form a closed shape.

2. The universal paper tray compression mold according to claim 1, characterized in that, A cross-shaped frame (11) is provided in the middle of the pressure foam top plate (10).

3. The universal paper tray compression mold according to claim 2, characterized in that, It also includes a first magnetic switch (40), of which two are provided. The two first magnetic switches (40) are respectively located at both ends of the cross beam of the cross frame (11), and the first magnetic switches (40) are arranged horizontally. The longitudinal bubble pressing strip (20) can be magnetically attracted by the first magnetic switch (40) so that the longitudinal bubble pressing strip (20) can be fixed on the bubble pressing top plate (10) by the magnetic force of the first magnetic switch (40).

4. The universal paper tray blister molding die according to claim 3, characterized in that, The longitudinal blister strip (20) includes a longitudinal inner strip (21), which is made of magnetic material and is covered with a first rubber sleeve (22).

5. The universal paper tray blister molding die according to claim 3, characterized in that, The first magnetic switch (40) includes: Two first magnetic conductors (41) are spaced apart and disposed on the cross frame (11); The first permanent magnet (42) is disposed between the two first magnetic conductors (41) and is capable of rotating along a preset axis; The first knob (43) is connected to the first permanent magnet (42) and is used to drive the first permanent magnet (42) to rotate; When the first permanent magnet (42) rotates to the point where its two poles are directly opposite the corresponding first magnetic conductor (41), the first magnetic conductor (41) attracts the longitudinal bubble bar (20) onto the bubble top plate (10).

6. The universal paper tray compression mold according to claim 5, characterized in that, The first magnetic switch (40) also includes a magnetic shielding pad (44), which is sandwiched between the two first magnetic conductors (41).

7. The universal paper tray blister molding die according to claim 3, characterized in that, It also includes a second magnetic switch (50), of which two are provided. The two second magnetic switches (50) are respectively located at both ends of the longitudinal beam of the cross frame (11), and the second magnetic switches (50) are arranged longitudinally. The transverse bubble pressing strip (30) can be magnetically attracted by the second magnetic switch (50) so that the transverse bubble pressing strip (30) can be fixed on the bubble pressing top plate (10) by the magnetic force of the second magnetic switch (50).

8. The universal paper tray blister molding die according to claim 7, characterized in that, The transverse bubble strip (30) includes a transverse inner strip (31), which is made of magnetic material and is covered with a second rubber sleeve (32).

9. The universal paper tray compression mold according to claim 7, characterized in that, The structure of the second magnetic switch (50) is the same as that of the first magnetic switch (40).

10. The universal paper tray blister molding die according to any one of claims 2 to 9, characterized in that, The top plate (10) of the foam press is made of magnetic material.

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