Bubble cap forming mechanism of packaging machine

Abstract

A blister forming mechanism of a packaging machine comprises a heating assembly and a forming assembly which are sequentially arranged, and is characterized in that the forming assembly comprises an upper lifting seat and a lower lifting seat, an upper forming die is arranged on the upper lifting seat, a lower forming die is arranged on the lower lifting seat, blow molding holes are formed in the upper forming die, and blow molding holes are formed in the lower lifting seat. A blow molding hole is formed in the lower forming die and corresponds to a forming groove in the lower forming die, the blow molding hole is communicated with a positive pressure pipe, the positive pressure pipe is connected with an air pump, plastic uptake holes corresponding to the forming groove are formed in the lower forming die in an arrayed mode, the plastic uptake holes are communicated with a negative pressure pipe, and the negative pressure pipe is connected with a negative pressure machine. The blister forming device is simple in structure and reasonable in design, blister forming and / or blow molding can be achieved, blister film heating integrity and balance are improved, and blister forming quality and efficiency are further improved.

Description

Technical Field

[0001] This utility model relates to packaging equipment, specifically to a blister forming mechanism for a packaging machine. Background Technology

[0002] Blister packaging machines are a common type of packaging equipment. Their working principle is as follows: the blister film is heated, and a forming mechanism creates bubbles on the blister film. Materials are then placed into the bubbles, and finally, a sealing film is heat-sealed to the blister film to seal the materials inside the bubbles. Currently, the defects of blister packaging machines on the market include: 1. In the forming process, high-pressure gas is usually blown out of the upper mold to blow the blister film into the forming groove of the lower mold to form the bubbles. This blow molding method causes the top of the bubble to be subjected to a large air compression force, resulting in a very small thickness at the top of the bubble, and may even cause damage, affecting the forming quality; 2. Traditional blister films are heated by extruding the blister film with cooperating heating plates. Since the heating plates generally use a structure with internally arranged heating wires for heating, the temperature of different parts of the heating plate will actually have a certain degree of difference. This will cause the blister film to be difficult to reach the heating requirements in some areas, affecting subsequent forming operations; 3. Traditional lower molds use a cam structure to achieve its lifting and lowering control. The stroke of the cam drive structure is difficult to adjust, and only one rotation of the cam can achieve one lifting and lowering of the lower mold, resulting in limited speed of lower mold movement and difficulty in achieving high-speed production operations. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is to provide a blister forming mechanism for a packaging machine to solve the above-mentioned problems.

[0004] Therefore, this utility model is implemented using the following solution:

[0005] A blister forming mechanism for a packaging machine includes a heating component and a forming component arranged sequentially. The forming component comprises an upper lifting seat and a lower lifting seat. An upper forming mold is disposed on the upper lifting seat, and a lower forming mold is disposed on the lower lifting seat. Blow-forming holes are arranged on the upper forming mold, corresponding to forming grooves on the lower forming mold. The blow-forming holes are connected to a positive pressure pipe, which is connected to an air pump. Suction-forming holes, corresponding to the forming grooves, are arranged on the lower forming mold. These suction-forming holes are connected to a negative pressure pipe, which is connected to a negative pressure unit.

[0006] The heating component includes an oven, which heats the blister film as it passes through.

[0007] The upper lifting seat is connected to the lifting drive cylinder.

[0008] The lower lifting seat is hinged to one end of the first transmission arm, and the other end of the first transmission arm is coaxially hinged to one end of the second and third transmission arms. One end of the second transmission arm is hinged to the base, and the other end of the third transmission arm is hinged to the lifting block. A guide component is provided corresponding to the lifting block. The lifting block is hinged to one end of the fourth transmission arm, and the other end of the fourth transmission arm is hinged to the fifth transmission arm. The other end of the fifth transmission arm is connected to the output end of the drive motor.

[0009] The blister forming mechanism of a packaging machine described above features a suction hole in the lower mold. During the forming process, the suction hole connects to a negative pressure component, generating negative pressure that allows the blister film to be suctioned into the forming groove. This forming method effectively reduces the impact pressure on the top of the blister, resulting in better blister forming quality. Simultaneously, an oven is used to heat the blister film. Since the overall temperature within the oven remains constant, the integrity and uniformity of the blister film's heating are ensured, facilitating subsequent forming processing. Furthermore, the use of a motor and transmission arm in conjunction with the transmission structure allows for easier adjustment of the lower mold's lifting stroke, enabling quick switching between different products, avoiding cam replacements, and improving operational flexibility. It also effectively increases the lower mold's lifting speed to meet the needs of high-speed production. Attached Figure Description

[0010] The present invention includes the following figures:

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a structural diagram of the molding component of this utility model;

[0013] Figure 3 for Figure 2 Another perspective;

[0014] Figure 4 This is a cross-sectional view of the molding component of this utility model. Detailed Implementation

[0015] As shown in the figure, the present invention discloses a blister forming mechanism for a packaging machine, comprising a heating component and a forming component arranged in sequence. The forming component includes an upper lifting seat 2 and a lower lifting seat 5. An upper forming mold 3 is provided on the upper lifting seat 2, and a lower forming mold 4 is provided on the lower lifting seat 5. Blowing holes 19 are arranged on the upper forming mold 3, and the blowing holes 19 correspond to the forming grooves 20 on the lower forming mold 4. The blowing holes 19 are connected to a positive pressure pipe 14, which is connected to an air pump. Suction holes 21 corresponding to the forming grooves 20 are arranged on the lower forming mold 4, and the suction holes 21 are connected to a negative pressure pipe 15, which is connected to a negative pressure machine.

[0016] Furthermore, the heating component includes an oven 1, which heats the blister film as it passes through. With this structure, the temperature inside the oven 1 can be kept constant, resulting in better uniform heating of the blister film and preventing inadequate localized heating, thus effectively improving subsequent molding operations.

[0017] Furthermore, the upper lifting seat 2 is connected to the lifting drive cylinder 6. By controlling the lifting drive cylinder 6, the upper lifting seat 2 can be raised and lowered. Of course, common linear drive mechanisms such as hydraulic cylinders and cam structures can also be used to raise and lower the upper lifting seat 2.

[0018] Furthermore, a second guide post 13 is provided on the lower lifting seat 5. The lower lifting seat 5 is hinged to one end of the first transmission arm 7. The other end of the first transmission arm 7 is coaxially hinged to one end of the second transmission arm 8 and the third transmission arm 9. One end of the second transmission arm 8 is hinged to the base 16, and the other end of the third transmission arm 9 is hinged to the lifting block 10. A guide assembly is provided corresponding to the lifting block 10. The guide assembly is the first guide post 11 that passes through the lifting block 10. The lifting block 10 is hinged to one end of the fourth transmission arm 12. The other end of the fourth transmission arm 12 is hinged to the fifth transmission arm 17. The other end of the fifth transmission arm 17 is connected to the output end of the drive motor 18. In order to improve the stability of its operation, each transmission arm is provided with four sets, which are respectively arranged at the four corners of the lower lifting seat 5. With the above structure, by controlling the drive motor 18 to swing the fifth and fourth transmission arms, the lifting block 10 can be raised and lowered under the guidance of the first guide post 11. Then, the lifting block 10 drives the third transmission arm 9 to move, which in turn drives the first and second transmission arms to swing, thereby raising and lowering the lower lifting seat 5. This driving method only requires controlling the rotation angle of the drive motor 18 to adjust the lifting height of the lower lifting seat 5, and controlling the rotation speed of the drive motor 18 to adjust the lifting speed of the lower lifting seat 5. It is more convenient to use and can adapt to the needs of high-speed production.

[0019] The working principle of this utility model is as follows: The blister film is first drawn into the oven 1 for heating. After heating, the blister film is drawn between the upper forming mold 3 and the lower forming mold 4 of the forming component. Then, the upper forming mold 3 and the lower forming mold 4 clamp the blister film. Then, the negative pressure machine is activated, which generates negative pressure in the negative pressure pipe 15, so that the suction hole 21 can generate an adsorption force to adsorb the blister film into the forming groove 20, thereby forming the bubble. Of course, during the forming process, the air pump can also be activated so that high-pressure gas of appropriate pressure enters the blow molding hole 19 of the upper forming mold 3 through the positive pressure pipe 14, which assists in the blow molding to press the blister film into the forming groove 20 to form the bubble, thus speeding up the forming speed. Moreover, the pressure of the high-pressure gas is lower than that of the traditional blow molding pressure, so it will not cause the top of the bubble to be too thin or to break.

[0020] This invention features a structure with suction holes in the lower mold. During the molding process, these holes connect to a negative pressure component, generating negative pressure that allows the blister film to be suctioned into the molding groove. This molding method effectively reduces the impact pressure on the top of the blister, resulting in better blister molding quality. Simultaneously, an oven is used to heat the blister film. Because the overall temperature within the oven remains constant, the integrity and uniformity of the heating process are ensured, facilitating subsequent molding. Furthermore, the use of a motor and transmission arm allows for easier adjustment of the lower mold's lifting stroke, enhancing its flexibility and effectively increasing the lower mold's lifting speed to meet the demands of high-speed production.

Claims

1. A blister forming mechanism for a packaging machine, comprising a heating component and a forming component arranged sequentially, characterized in that: The molding assembly includes an upper lifting seat (2) and a lower lifting seat (5). The upper lifting seat (2) is provided with an upper molding mold (3), and the lower lifting seat (5) is provided with a lower molding mold (4). The upper molding mold (3) is provided with blow molding holes (19), which correspond to the molding grooves (20) on the lower molding mold (4). The blow molding holes (19) are connected to the positive pressure pipe (14), which is connected to the air pump. The lower molding mold (4) is provided with suction holes (21) corresponding to the molding grooves (20). The suction holes (21) are connected to the negative pressure pipe (15), which is connected to the negative pressure machine.

2. The blister forming mechanism of a packaging machine according to claim 1, characterized in that: The heating component includes an oven (1), which heats the blister film as it passes through the oven (1).

3. The blister forming mechanism of a packaging machine according to claim 1, characterized in that... The upper lifting seat (2) is connected to the lifting drive cylinder (6).

4. The blister forming mechanism of a packaging machine according to claim 1, characterized in that... The lower lifting seat (5) is hinged to one end of the first transmission arm (7), and the other end of the first transmission arm (7) is coaxially hinged to one end of the second transmission arm (8) and the third transmission arm (9). One end of the second transmission arm (8) is hinged to the base (16), and the other end of the third transmission arm (9) is hinged to the lifting block (10). A guide component is provided corresponding to the lifting block (10). The lifting block (10) is hinged to one end of the fourth transmission arm (12), and the other end of the fourth transmission arm (12) is hinged to the fifth transmission arm (17). The other end of the fifth transmission arm (17) is connected to the output end of the drive motor (18).

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