Preheating mechanism of blister forming machine for blister packaging

Abstract

The utility model discloses a preheating mechanism of a plastic uptake forming machine for plastic uptake packaging, and belongs to the technical field of plastic uptake forming equipment. Comprising a preheating box, a preheating assembly and a film rolling mechanism are arranged in the preheating box, a fixing support is arranged on one side of the preheating box, a forming mechanism, a stamping table and a heating mechanism are arranged in the fixing support, and a lifting support is arranged at the bottom of the heating mechanism. The problem that an existing preheating effect is insufficient is solved, air is injected into the heating cavity through the air blower, the air is converted into hot air through the first heating rod, and then the hot air is conveyed into the air spraying frame to be sprayed to the surface of a plastic film to be preheated and softened; the film rolling mechanism drives the plastic film to extend to the surface of the stamping table, a second heating rod and a fan are started to blow hot air into a hollow inner cavity of the stamping table from bottom to top, and the plastic film on the surface of the stamping table is further heated; and the distance between the heating box and the stamping table is adjusted through the lifting support, the plastic film is prevented from adhering to the stamping table and the surface of the mold, and the plastic film blister forming effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of blister forming equipment, in particular to a preheating mechanism of a blister forming machine for blister packaging. Background Art

[0002] The blister forming machine is also called the thermoplastic forming machine. The process of this forming equipment is mainly to use the vacuum suction force generated by the vacuum pump to heat and soften the thermoplastic plastic sheets of PVC, PET, PETG, APTT, PP, PE, PS, etc. through the mold to form vacuum covers of various shapes, or attach them to the surface of products of various shapes. The blister forming machine is divided into thin sheet blister forming and thick sheet blister forming according to the thickness of the sheet.

[0003] For example, the Chinese patent with publication number: CN220180125U discloses a preheating mechanism for a blister forming machine, which mainly solves the problem that the heated mold is easy to make the plastic stick to the mold when it contacts the plastic. The patent uses a heating structure and a fan to cooperate with an electric heating tube to heat the plastic by air heating, so as to soften the plastic while preventing the plastic from contacting and sticking to other solids; however, in actual operation, since the plastic film needs to move up with the clamping plate and get close to the mold, the distance between the plastic film and the bottom hot air is increased, and the heating tube is set in a relatively single position, it is difficult to achieve the preheating effect and later forming effect of the plastic film. Utility Model Content

[0004] The utility model aims to provide a preheating mechanism for a blister forming machine for blister packaging, which has the advantages of early preheating and continuous heating, effectively ensures the preheating effect and later forming effect of the plastic film, and solves the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a preheating mechanism of a blister forming machine for blister packaging, comprising a preheating box, wherein a preheating component and a film rolling mechanism are arranged inside the preheating box, a fixed bracket is arranged on one side of the preheating box, a forming mechanism, a stamping table and a heating mechanism are arranged on the inner side of the fixed bracket in sequence from top to bottom, a lifting bracket is arranged at the bottom of the heating mechanism, and guide rods are symmetrically arranged on both sides of the fixed bracket.

[0006] Furthermore, an inlet panel is provided on one side of the preheating box, and a handle is provided on the inlet panel.

[0007] Furthermore, the preheating assembly includes a heating chamber, a first heating rod, a jet rack, a blower and an air pipe. A heating chamber is arranged above the interior of the preheating box, a first heating rod is arranged inside the heating chamber, a jet rack is arranged below the interior of the preheating box and at the bottom end of the heating chamber, the blower is arranged at the top of the preheating box, and both ends of the blower are respectively connected to an air pipe, one of which is connected to the heating chamber, and the other is connected to the jet rack.

[0008] Furthermore, the molding mechanism includes a cylinder, a gas rod and a mold. The cylinder is arranged on the top of the fixed bracket, and the bottom end of the cylinder is connected to the gas rod. The gas rod passes through the top of the fixed bracket and extends downward to be connected to the mold.

[0009] Furthermore, the heating mechanism includes a heating box, a connecting block, a second heating rod and a fan. The connecting blocks are symmetrically arranged on both sides of the heating box, and the heating box is slidably connected to the two guide rods through the connecting blocks on both sides. The second heating rod and the fan are arranged in sequence from top to bottom inside the heating box.

[0010] Furthermore, an aluminum plate is provided on the upper end surface of the heating box, and filter holes are evenly distributed on the surface of the aluminum plate.

[0011] Furthermore, a through hole is provided at the center of the connecting block, and the inner diameter of the through hole is matched with the outer diameter of the guide rod.

[0012] Furthermore, a plastic film for blister packaging is wound on the film rolling mechanism, and a driving motor is arranged on one side of the film rolling mechanism.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model discloses a preheating mechanism for a blister forming machine for blister packaging. The mechanism starts a blower to inject air into a heating chamber, starts a first heating rod to heat the internal temperature of the heating chamber, thereby converting the injected air into hot air, which is then transmitted to an injection frame by another air delivery pipe, and the hot air is sprayed onto the surface of a plastic film below via the injection frame, thereby preheating and softening the plastic film; secondly, the plastic film is driven to extend to the surface of a stamping table via a film rolling mechanism, and a second heating rod and a fan are started to blow hot air from bottom to top into a hollow inner cavity of the stamping table, thereby further heating the plastic film on the surface; at the same time, according to the surface temperature of the plastic film, a lifting bracket is used to adjust the distance between the heating box and the stamping table, so as to prevent the plastic film from sticking to the stamping table and the mold surface due to excessively high surface temperature, thereby ensuring the blister forming effect of the plastic film and improving the feasibility of the blister forming machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the plastic blister forming machine of the utility model;

[0016] Figure 2 It is a schematic diagram of the preheating mechanism of the blister forming machine of the utility model;

[0017] Figure 3 It is a side view of the fixing bracket of the blister forming machine of the utility model;

[0018] Figure 4It is a schematic diagram of the heating mechanism of the vacuum forming machine of the present utility model.

[0019] In the figure: 1. preheating box; 2. preheating assembly; 3. film rolling mechanism; 4. fixing bracket; 5. forming mechanism; 6. stamping table; 7. heating mechanism; 8. lifting bracket; 9. guide rod; 11. inlet panel; 12. handle; 21. heating chamber; 22. first heating rod; 23. jet rack; 24. blower; 25. air pipe; 51. cylinder; 52. air rod; 53. mold; 71. heating box; 711. aluminum plate; 72. connecting block; 73. second heating rod; 74. fan. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In order to solve the technical problem that the existing plastic film needs to be moved up with the clamping plate and close to the mold 53, resulting in a larger distance between the plastic film and the bottom hot air, and the heating tube is set in a relatively single position, making it difficult to achieve the preheating effect and the later forming effect of the plastic film, please refer to Figure 1-Figure 4 , this embodiment provides the following technical solutions:

[0022] A preheating mechanism of a blister forming machine for blister packaging, comprising a preheating box 1, an inlet panel 11 is arranged on one side of the preheating box 1, a handle 12 is arranged on the inlet panel 11, the inlet panel 11 is connected to one side of the preheating box 1 through a hinge, mainly to facilitate opening and closing the preheating box 1, and to add plastic film to the internal film rolling mechanism 3; a preheating component 2 and a film rolling mechanism 3 are arranged inside the preheating box 1, the preheating component 2 comprises a heating chamber 21, a first heating rod 22, an air jet frame 23, a blower 24 and an air delivery pipe 25, a heating chamber 21 is arranged above the inside of the preheating box 1, a first heating rod 22 is arranged inside the heating chamber 21, the first heating rod 22 is placed at the top of the inside of the heating chamber 21, and is mainly used to heat the internal temperature of the heating chamber 21 ; An injection rack 23 is arranged at the bottom of the interior of the preheating box 1 and at the bottom end of the heating chamber 21, a blower 24 is arranged at the top of the preheating box 1, and two ends of the blower 24 are respectively connected with an air pipe 25, one of which is connected to the heating chamber 21, and the other is connected to the injection rack 23; wherein, the film rolling mechanism 3 is located at the bottom of the interior of the preheating box 1, and the bottom of the interior of the preheating box 1 is not connected to the interior of the heating chamber 21, so the air pipe 25 cooperates with the injection rack 23 to spray hot air to the film rolling mechanism 3 below; a plastic film for blister packaging is wound on the film rolling mechanism 3, and a driving motor is arranged on one side of the film rolling mechanism 3, and the driving motor is used to provide driving force for the film rolling mechanism 3, driving The plastic film moves toward the surface of the punching table 6 to complete the automatic blister packaging forming operation; a fixed bracket 4 is provided on one side of the preheating box 1, and a forming mechanism 5, a punching table 6 and a heating mechanism 7 are provided on the inner side of the fixed bracket 4 from top to bottom, a lifting bracket 8 is provided at the bottom of the heating mechanism 7, and guide rods 9 are symmetrically provided on both sides of the fixed bracket 4; the forming mechanism 5 includes a cylinder 51, a gas rod 52 and a mold 53, the cylinder 51 is provided at the top of the fixed bracket 4, the bottom end of the cylinder 51 is connected to the gas rod 52, the gas rod 52 passes through the top of the fixed bracket 4, and extends to the bottom to connect with the mold 53; the middle part of the punching table 6 is hollow, and the hollow shape is adapted to the shape of the mold 53; the heating mechanism 7 includes a heating box 71, a connecting block 72, the first Two heating rods 73 and a fan 74, the upper end surface of the heating box 71 is provided with an aluminum plate 711, and the surface of the aluminum plate 711 is evenly distributed with filter holes, which mainly promote the heat to dissipate upwards. At the same time, the aluminum plate 711 can isolate part of the internal heat to prevent the plastic film from being damaged by excessive temperature; connecting blocks 72 are symmetrically arranged on both sides of the heating box 71, and a through hole is opened at the center of the connecting block 72, and the inner diameter of the through hole is adapted to the outer diameter of the guide rod 9, so the heating box 71 is slidably sleeved on the two guide rods 9 through the connecting blocks 72 on both sides, and the connecting blocks 72 cooperate with the guide rods 9 to ensure the stability of the heating box 71 when it moves up and down; the interior of the heating box 71 is sequentially provided with a second heating rod 73 and a fan 74 from top to bottom;Among them, the first heating rod 22 and the second heating rod 73 can be selected from the following models in actual use: Huihouying 1KW single-ended electric heating tube. ;

[0023] Specifically, the blower 24 is started to inject air into the heating chamber 21, and the first heating rod 22 is started to heat the internal temperature of the heating chamber 21, so that the injected air is converted into hot air, which is then transmitted to the injection rack 23 by another air delivery pipe 25, and the hot air is sprayed onto the film rolling mechanism 3 through the injection rack 23, thereby preheating and softening the plastic film wrapped on its surface; secondly, the plastic film is driven to extend to the surface of the stamping table 6 through the film rolling mechanism 3, and the second heating rod 73 and the fan 74 are started to pass the hot air through the filter holes on the surface of the aluminum plate 711 and blow it from bottom to top to the stamping table 6. The hollow inner cavity of the table 6 is used to further heat the plastic film on its surface; at the same time, the height of the heating box 71 is adjusted according to the surface temperature of the plastic film, and the lifting bracket 8 is used to drive the heating box 71 to move up and down. When it is lifted or lowered, the heating box 71 uses the connecting blocks 72 at both ends to slide along the guide rods 9 on both sides. While ensuring the stability of the upward movement, the distance between the heating box 71 and the stamping table 6 is adjusted to prevent the plastic film from sticking to the surface of the stamping table 6 and the mold 53 due to the high surface temperature, thereby ensuring the preheating effect of the plastic film and the blister forming effect, and improving the feasibility of the blister forming machine.

[0024] Working principle: air is injected into the heating chamber 21 through the blower 24, and the first heating rod 22 converts it into hot air, which is then transmitted to the jet frame 23 and sprayed onto the surface of the plastic film for preheating and softening; the film rolling mechanism 3 drives the plastic film to extend to the surface of the stamping table 6, and the second heating rod 73 and the fan 74 are started to blow hot air from bottom to top into the hollow inner cavity of the stamping table 6 to further heat the plastic film on its surface; the lifting bracket 8 is used to adjust the distance between the heating box 71 and the stamping table 6 to prevent the plastic film from sticking to the surface of the stamping table 6 and the mold 53, thereby ensuring the preheating effect of the plastic film.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preheating mechanism for a blister forming machine for blister packaging, comprising: A preheating box (1) is characterized in that: a preheating component (2) and a film rolling mechanism (3) are arranged inside the preheating box (1); a fixed bracket (4) is arranged on one side of the preheating box (1); a forming mechanism (5), a punching table (6) and a heating mechanism (7) are arranged on the inner side of the fixed bracket (4) from top to bottom; a lifting bracket (8) is arranged at the bottom of the heating mechanism (7); and guide rods (9) are symmetrically arranged on both sides of the fixed bracket (4).

2. A preheating mechanism for a blister forming machine for blister packaging according to claim 1, characterized in that: An inlet panel (11) is provided on one side of the preheating box (1), and a handle (12) is provided on the inlet panel (11).

3. The preheating mechanism of a blister forming machine for blister packaging according to claim 1, characterized in that: The preheating assembly (2) comprises a heating chamber (21), a first heating rod (22), an injection rack (23), a blower (24) and an air supply pipe (25); the heating chamber (21) is arranged at the upper part of the preheating box (1); the first heating rod (22) is arranged inside the heating chamber (21); the injection rack (23) is arranged at the lower part of the preheating box (1) and at the bottom end of the heating chamber (21); the blower (24) is arranged at the top end of the preheating box (1); and the two ends of the blower (24) are respectively connected to an air supply pipe (25), wherein one air supply pipe (25) is connected to the heating chamber (21), and the other air supply pipe (25) is connected to the injection rack (23).

4. The preheating mechanism of a blister forming machine for blister packaging according to claim 1, characterized in that: The molding mechanism (5) comprises a cylinder (51), a gas rod (52) and a mold (53); the cylinder (51) is arranged on the top of the fixed bracket (4); the bottom end of the cylinder (51) is connected to the gas rod (52); the gas rod (52) passes through the top of the fixed bracket (4) and extends to the bottom to be connected to the mold (53).

5. The preheating mechanism of a blister forming machine for blister packaging according to claim 1, characterized in that: The heating mechanism (7) comprises a heating box (71), a connecting block (72), a second heating rod (73) and a fan (74); the connecting blocks (72) are symmetrically arranged on both sides of the heating box (71); the heating box (71) is slidably sleeved on two guide rods (9) through the connecting blocks (72) on both sides; the second heating rod (73) and the fan (74) are arranged in sequence from top to bottom inside the heating box (71).

6. A preheating mechanism for a blister forming machine for blister packaging according to claim 5, characterized in that: An aluminum plate (711) is provided on the upper end surface of the heating box (71), and filter holes are evenly distributed on the surface of the aluminum plate (711).

7. A preheating mechanism for a blister forming machine for blister packaging according to claim 5, characterized in that: A through hole is provided at the center of the connecting block (72), and the inner diameter of the through hole is matched with the outer diameter of the guide rod (9).

8. The preheating mechanism of a blister forming machine for blister packaging according to claim 1, characterized in that: A plastic film for blister packaging is wound on the film rolling mechanism (3), and a driving motor is arranged on one side of the film rolling mechanism (3).

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