Heat-sealing and cold-cutting device of bag making machine for PE shrink bags

Abstract

The utility model discloses a bag making machine heat sealing cold cutting device for PE shrink bags, which comprises a base, a cold cutting assembly and a storage assembly, the cold cutting assembly is positioned between two groups of support plates, the cold cutting assembly comprises a cold cutter, a second guide rod, a connecting rod, a cam and a motor, the output end of the motor is connected with the cam, and the cam is connected with the storage assembly. The outer side of the cam is connected with the connecting rod, two sets of second guide rods are arranged on the inner side of the supporting plate, the two sets of second guide rods are provided with the cold cutting knife in a penetrating mode, a pressing roller is arranged between the heat sealing knife and the cold cutting assembly, and a through hole is formed in the inner side of a stacking table in a penetrating mode; the negative pressure cavity is formed below the stacking table, and the exhaust fan is connected to the outer side of the negative pressure cavity. According to the PE bag hot-sealing device, hot-sealed PE bags can be pressed, positioned and adjusted, so that the situation that hot-sealing lines and cold-cutting lines of the PE bags are inconsistent is prevented, the situation that the shapes of the formed bags are not uniform is avoided, and the quality of the PE bags is improved advantageously.

Description

Technical Field

[0001] The utility model relates to the technical field of heat sealing and cold cutting of bag making machines, in particular to a heat sealing and cold cutting device of a bag making machine for PE shrink bags. Background Art

[0002] PE shrink bag is a transparent plastic bag made of thermoplastic resin, which can be used for packaging of clothing, luggage, electronics, plastics and other products, and is environmentally friendly and practical. For example, the patent document with application number CN202220416645.3 discloses an automatic heat sealing and cold cutting device for a plastic film bag making machine, which flattens the plastic bag film by setting a flattening mechanism and then transmits it to the top of the lower seat with a transmission mechanism. The overall process is relatively stable, which effectively improves the quality of plastic bags.

[0003] However, in similar schemes mentioned above, the heat sealing and cold cutting processes are mostly divided into two processes. Due to the elongated process and the lack of positioning devices, the heat sealing line of the PE bag is inconsistent with the cold cutting edge line, or even skewed and misaligned with the cutting edge, resulting in an inconsistent shape of the formed bag. The cold cutting knife is driven by a cylinder to cut up and down, resulting in poor stability and inconvenience in adjusting the length of the PE bag. After the heat sealing is completed, the PE bag is pushed out by the rotating roller, resulting in uneven stacking and easy to be affected by external wind, requiring staff to sort it out.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a heat sealing and cold cutting device for a PE shrink bag making machine is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a heat-sealing and cold-cutting device for a PE shrink bag making machine, which solves the above-mentioned similar solutions proposed in the above-mentioned background technology. The heat-sealing and cold-cutting processes are mostly divided into two processes. Due to the elongation of the process and the lack of a positioning device, the heat-sealing line of the PE bag is inconsistent with the cold-cutting edge line, or even skewed and misaligned with the cutting edge, resulting in an uneven shape of the formed bag. The cold-cutting knife is driven by a cylinder to cut up and down, resulting in poor stability and inconvenience in adjusting the length of the PE bag. After the heat-sealing is completed, the PE bag is pushed out by a rotating roller, resulting in uneven stacking and being easily affected by external wind, requiring staff to sort it out.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat-sealing and cold-cutting device for a PE shrink bag making machine, comprising a base, a cold-cutting assembly and a storage assembly, two groups of support plates are fixedly arranged above the base, and cross beams are arranged above the two groups of support plates, a heat-sealing knife is arranged below the cross beam, and the cold-cutting assembly is located between the two groups of support plates, the cold-cutting assembly comprises a cold-cutting knife, a second guide rod, a connecting rod, a cam and a motor, and the motor is arranged on the lower surface of the base, the output end of the motor is connected to the cam, and the cam The connecting rod is connected to the outside, two groups of the second guide rods are arranged on the inner side of the support plate, the two groups of the second guide rods are penetrated by the cold cutting knife, a pressure roller is arranged between the heat sealing knife and the cold cutting component, the storage component is located at the front end of the cold cutting component, and the storage component includes a stacking table, a through hole, a negative pressure chamber and an exhaust fan, the stacking table is arranged on the upper surface of the base, and the through hole is penetrated on the inner side of the stacking table, the negative pressure chamber is arranged below the stacking table, and the exhaust fan is connected to the outer side of the negative pressure chamber.

[0007] Furthermore, an electric telescopic rod is provided above the cross beam, and two groups of first guide rollers are symmetrically provided on both sides of the electric telescopic rod, and a baffle is provided between the heat sealing knife and the cross beam.

[0008] Furthermore, the lower end of the first guide roller is fixedly connected to the heat sealing knife, and the heat sealing knife forms a lifting structure through the electric telescopic rod and two groups of the first guide rollers.

[0009] Furthermore, the cold cutting knife forms a lifting structure through the second guide rod, the connecting rod, the cam and the motor.

[0010] Furthermore, the lower surface of the heat-sealing knife, the central axis of the pressing roller and the lower surface of the cold-cutting knife are arranged in parallel.

[0011] Furthermore, four groups of limit blocks are arranged on the upper surface of the base, and a knife pad is arranged below the cold cutting knife.

[0012] The utility model provides a heat sealing and cold cutting device for a PE shrink bag making machine, which has the following beneficial effects:

[0013] It can press and position the heat-sealed PE bag to prevent the heat-sealed line of the PE bag from being inconsistent with the cold-cut edge line, and avoid the shape of the formed bag from being inconsistent, which is beneficial to improving the quality of the PE bag. The mechanical structure drives the cold cutter to cut up and down, which improves the stability of the device and is beneficial to adjusting the length of the PE bag. It can also automatically stack the cut PE bags to avoid subsequent adjustments by the staff. The specific contents are as follows:

[0014] The PE bag passes through two sets of limit blocks and moves to the bottom of the heat sealing knife. The heat sealing knife descends to seal the PE bag. When the heat sealing knife is lifted, the PE bag is pressed by the pressure roller and separated from the heat sealing knife. Then the PE bag is clamped by the other two sets of limit blocks until the PE bag is transferred to the top of the knife pad table. The cold cutting knife moves downward to cut off the PE bag, and the PE bag falls from the knife pad table. Since there is an exhaust fan under the storage table, there is a downward suction force above the storage table, so that the PE bag finally falls on the top of the storage component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the vertical structure of a heat-sealing and cold-cutting device of a PE shrink bag making machine of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of a heat-sealing and cold-cutting device of a PE shrink bag making machine of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a storage component of a heat-sealing and cold-cutting device of a bag-making machine for PE shrink bags of the utility model;

[0018] Figure 4 The utility model is a PE shrink bag making machine heat sealing and cold cutting device Figure 2 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1. base; 2. support plate; 3. crossbeam; 4. electric telescopic rod; 5. baffle; 6. heat sealing knife; 7. first guide roller; 8. cold cutting assembly; 801. cold cutting knife; 802. second guide rod; 803. connecting rod; 804. cam; 805. motor; 9. pressure roller; 10. limit block; 11. storage assembly; 1101. stacking table; 1102. through hole; 1103. negative pressure chamber; 1104. exhaust fan; 12. knife pad table. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] like Figures 1 to 4As shown, a heat-sealing and cold-cutting device of a bag-making machine for PE shrink bags comprises a base 1, a cold-cutting assembly 8 and a storage assembly 11. Two groups of support plates 2 are fixedly arranged above the base 1, and a crossbeam 3 is arranged above the two groups of support plates 2, a heat-sealing knife 6 is arranged below the crossbeam 3, an electric telescopic rod 4 is penetrated above the crossbeam 3 for driving the heat-sealing knife 6 to move up and down, and two groups of first guide rollers 7 are symmetrically arranged on both sides of the electric telescopic rod 4, and a baffle 5 is arranged between the heat-sealing knife 6 and the crossbeam 3. Because the lower end of the first guide roller 7 is fixedly connected to the heat-sealing knife 6, it is used to prevent the heat-sealing knife 6 from tilting during the descent process, which is beneficial to improving the stability of the device.

[0022] The cold cutting assembly 8 is located between the two groups of support plates 2. The cold cutting assembly 8 includes a cold cutting knife 801, a second guide rod 802, a connecting rod 803, a cam 804 and a motor 805. The motor 805 is arranged on the lower surface of the base 1. The output end of the motor 805 is connected to the cam 804, and the outer side of the cam 804 is connected to the connecting rod 803. Two groups of second guide rods 802 are arranged on the inner side of the support plate 2. The two groups of second guide rods 802 are penetrated by the cold cutting knife 801, and the lower side of the cold cutting knife 801 is provided with a second guide rod 802. A knife pad 12 is provided, because the cold cutting knife 801 forms a lifting structure through the second guide rod 802, the connecting rod 803, the cam 804 and the motor 805, so that the cold cutting knife 801 can perform reciprocating lifting motion, and the mechanical structure formed by the motor 805 and the cam 804 replaces the traditional cylinder to drive the cold cutting knife 801 to cut up and down, which is beneficial to further improve the stability of the device, and the descending speed of the cold cutting knife 801 is controlled by the rotation speed of the motor 805, which is convenient for controlling the length of the PE bag.

[0023] A pressing roller 9 is provided between the heat-sealing knife 6 and the cold-cutting assembly 8 to prevent adhesion between the heat-sealing knife 6 and the PE bag. The storage assembly 11 is located at the front end of the cold-cutting assembly 8. Four groups of limit blocks 10 are provided on the upper surface of the base 1. By providing the limit blocks 10, the PE bag is moved from the inner side of the limit blocks 10, and the heat-sealed PE bag can be pressed and positioned to prevent the heat-sealing line of the PE bag from being inconsistent with the cold-cutting edge line, and avoid the shape of the formed bag from being inconsistent, which is beneficial to improving the quality of the PE bag.

[0024] The storage component 11 includes a stacking platform 1101, a through hole 1102, a negative pressure chamber 1103 and an exhaust fan 1104. The stacking platform 1101 is arranged on the upper surface of the base 1, and the through hole 1102 is penetrated through the inner side of the stacking platform 1101. A negative pressure chamber 1103 is arranged below the stacking platform 1101, and the outer side of the negative pressure chamber 1103 is connected to the exhaust fan 1104. Through the negative pressure chamber 1103 and the through hole 1102, there is a downward suction force above the storage platform 1101, so that the cut PE bags will not be blown away by the external environment, and the PE bags are gathered above the storage platform, which is convenient for the staff to recycle.

[0025] In summary, when the heat-sealing and cold-cutting device for the PE shrink bag making machine is used, first, the PE bag moves to the bottom of the heat-sealing knife 6 through the two groups of limit blocks 10 at the rear end, and the electric telescopic rod 4 extends downward, driving the baffle 5 and the heat-sealing knife 6 to move downward along the first guide roller 7, and the heat-sealing knife 6 contacts the PE bag and seals it, and the electric telescopic rod 4 is retracted upward, driving the heat-sealing knife 6 to lift up, and at the same time, the PE bag is pressed by the pressure roller 9 and separated from the heat-sealing knife 6, and then the PE bag is clamped by the other two groups of limit blocks 10, and the PE bag is moved. The PE bag moves to the top of the knife pad table 12, and the motor 805 drives the cam 804 to rotate. The cam 804 drives the connecting rod 803 and the cold cutting knife 801 to move downward to cut the PE bag. The PE bag falls from the knife pad table 12. At this time, the exhaust fan 1104 draws air outward, so that a negative pressure chamber 1103 exists under the storage table 1101. The negative pressure chamber 1103 forms a downward suction through the through hole 1102, so that the PE bag is sucked onto the storage table 1101 when it falls to the top of the storage table 1101.

Claims

1. A heat-sealing and cold-cutting device for a PE shrink bag making machine, comprising a base (1), a cold-cutting component (8) and a storage component (11), characterized in that: Two groups of support plates (2) are fixedly arranged above the base (1), and a crossbeam (3) is arranged above the two groups of support plates (2), a heat sealing knife (6) is arranged below the crossbeam (3), and the cold cutting assembly (8) is located between the two groups of support plates (2), the cold cutting assembly (8) comprises a cold cutting knife (801), a second guide rod (802), a connecting rod (803), a cam (804) and a motor (805), and the motor (805) is arranged on the lower surface of the base (1), the output end of the motor (805) is connected to the cam (804), and the outer side of the cam (804) is connected to the connecting rod (803), and two groups of the second guide rods (802) are arranged on the inner side of the support plate (2). , the two groups of the second guide rods (802) are penetrated by the cold cutting knife (801), a pressure roller (9) is arranged between the heat sealing knife (6) and the cold cutting component (8), the storage component (11) is located at the front end of the cold cutting component (8), and the storage component (11) includes a stacking table (1101), a through hole (1102), a negative pressure chamber (1103) and an exhaust fan (1104), the stacking table (1101) is arranged on the upper surface of the base (1), and the through hole (1102) is penetrated on the inner side of the stacking table (1101), the negative pressure chamber (1103) is arranged below the stacking table (1101), and the exhaust fan is connected to the outer side of the negative pressure chamber (1103).

2. A heat sealing and cold cutting device for a PE shrink bag making machine according to claim 1, characterized in that: An electric telescopic rod (4) is provided above the cross beam (3), two groups of first guide rollers (7) are symmetrically provided on both sides of the electric telescopic rod (4), and a baffle (5) is provided between the heat sealing knife (6) and the cross beam (3).

3. A heat sealing and cold cutting device for a PE shrink bag making machine according to claim 2, characterized in that: The lower end of the first guide roller (7) is fixedly connected to the heat sealing knife (6), and the heat sealing knife (6) forms a lifting structure through the electric telescopic rod (4) and two groups of the first guide rollers (7).

4. The heat sealing and cold cutting device for a PE shrink bag making machine according to claim 1, characterized in that: The cold cutting knife (801) forms a lifting structure through the second guide rod (802), the connecting rod (803), the cam (804) and the motor (805).

5. The heat sealing and cold cutting device for a PE shrink bag making machine according to claim 1, characterized in that: The lower surface of the heat-sealing knife (6), the central axis of the pressing roller (9) and the lower surface of the cold-cutting knife (801) are arranged in parallel.

6. The heat sealing and cold cutting device for a PE shrink bag making machine according to claim 1, characterized in that: Four groups of limit blocks (10) are arranged on the upper surface of the base (1), and a knife pad (12) is arranged below the cold cutting knife (801).

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