CN107584564A - A kind of thermoplastic envelope/device for thermally cutting - Google Patents

Abstract

The invention relates to a thermoplastic sealing/thermal cutting device, comprising a first heating rod (1) and a control circuit; it is characterized in that the first heating rod (1) is formed by connecting multiple sections of first heating wires (2), each One end of the first heating wire (2) is connected to one pole of the power supply through a relay, and the other end of each of the first heating wires (2) is connected to the other pole of the power supply through a switch; the control circuit controls each of the relays and each of the switches is turned on and off so that each of the first heating wires (2) is energized sequentially. Compared with the prior art, the thermoplastic sealing/thermal cutting device provided by the present invention can heat the heating rod in sections through the design of the special heating rod and control circuit, so that the ideal heating power can be obtained under weak electric voltage, That is to say, it meets the requirements of thermal plastic sealing/thermal cutting, and at the same time greatly improves the safety of use, completely avoiding the hidden danger of electricity use.

Description

A thermoplastic sealing/thermal cutting device

technical field

The invention relates to a thermoplastic sealing/thermal cutting device.

Background technique

The thermoplastic sealing/cutting device is mainly used for heat sealing and/or thermal cutting of plastic bags, and usually includes a heating rod and a pressing plate corresponding to the heating rod, and the heating rod is connected to a heating circuit. When working, the heating circuit is closed, the electric heating rod is powered and heated, and connected to the pressing plate, the plastic film added between the pressing plate and the electric heating rod is hot-melt sealed and/or hot-melt cut.

However, the electric heating rod in the existing thermoplastic sealing/thermal cutting device is a whole resistance connected in the circuit, and it is necessary to supply the electric heating rod with strong electricity to meet the heat requirements of sealing and cutting, resulting in potential safety hazards.

Contents of the invention

The technical problem to be solved by the present invention is to provide a thermal plastic sealing/thermal cutting device that can be heated in sections in view of the current state of the art.

The technical solution adopted by the present invention to solve the above technical problems is: the thermoplastic sealing/thermal cutting device includes a first heating rod and a control circuit; One end of the first heating wire is connected to one pole of the power supply through a relay, and the other end of each first heating wire is connected to the other pole of the power supply through a switch;

The control circuit controls the on and off of each of the relays and each of the switches so as to sequentially energize each of the first heating wires.

In order to make the connection simple, the other ends of the two first heating wires can be connected to the other pole of the power supply through the same switch.

As an improvement, it may also include a second heating rod, the second heating rod is formed by connecting multiple sections of second heating wires, one end of each of the second heating wires is connected to one pole of the power supply through a relay, each of the second heating wires The other end of the wire is connected to the other pole of the power supply through a switch;

The control circuit controls the on and off of each of the relays and each of the switches so that each of the second heating wires 3 is energized sequentially.

In this way, the two heating rods are respectively responsible for cutting and sealing after thermoplastic sealing, which can obtain better operational stability and meet different use requirements.

In order to make the connection simple, the other ends of the two second heating wires are connected to the other pole of the power supply through the same switch.

More preferably, the other ends of the two first heating wires on the first heating rod and the other ends of the corresponding two second heating wires on the second heating rod are connected to the other end of the power supply through the same switch. pole.

As a further improvement, the first heating rod and the second heating rod can be arranged on the first base at intervals, and the second base has a corresponding to the first heating rod and the second heating rod extrusion surface;

The driving device drives and connects the first base and/or the second base, so that the first base and the second base move toward or back, so that the first heating rod 1, The second heating rods are butted against their corresponding extrusion surfaces.

There are two groups of driving devices, both of which include motors, and the motors drive and connect the connecting rods, and the connecting rods are driven and connected to the first base and the second base corresponding to each other through the transmission assembly.

The transmission assembly includes a first gear and a second gear coaxially connected with the connecting rod, the first gear and the second gear mesh with the first rack and the second rack respectively, and the first rack and the second rack The rack is arranged on the base and positioned relative to the base.

Two guide rods are also provided on the base, and the two ends of the first base and the second base are respectively slidably limited on the two guide rods.

Compared with the prior art, the thermoplastic sealing/thermal cutting device provided by the present invention can heat the heating rod in sections through the design of the special heating rod and control circuit, so that the ideal heating power can be obtained under weak electric voltage, That is to say, it meets the requirements of thermal plastic sealing/thermal cutting, and at the same time greatly improves the safety of use, completely avoiding the hidden danger of electricity use.

Description of drawings

Fig. 1 and Fig. 2 are three-dimensional schematic diagrams of different angles of the assembly structure of the embodiment of the present invention;

Fig. 3 is the exploded schematic diagram of the embodiment of the present invention;

Fig. 4 is a schematic perspective view of a first heating rod and a second heating rod in an embodiment of the present invention;

Fig. 5 is a three-dimensional schematic diagram in the state of heat sealing/thermal cutting in the embodiment of the present invention;

FIG. 6 is a circuit schematic diagram of an embodiment of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 6, the thermoplastic sealing/thermal cutting device includes:

The first base 7 is used to support and connect the first heating rod 1 and the second heating rod 5 , and the first heating rod 1 and the second heating rod 5 are embedded on the first base 7 parallel to each other.

The second base 8 is arranged opposite to the first base 7, and is used to provide a pressing surface that is docked with the first heating rod 1 and the second heating rod 5; A heating rod 1 and a first extrusion platform 81 and a second extrusion platform 82 that are compatible with the second heating rod 5, the first extrusion platform 81 and the second extrusion platform 82 are embedded in the second base parallel to each other. On the side of seat 8.

The base 9 is used to support and connect the first base 7 and the second base 8, and two guide rods 99 parallel to each other are arranged on it to guide the moving tracks of the first base 7 and the second base 8, Both ends of the first base 7 and the second base 8 are slidably passed through the two guide rods 99 respectively.

There are two groups of driving devices, which drive and connect the first base 7 and the second base 8 respectively, and both include a motor 91. The motor in this embodiment is a dual-axis output motor, and the two output shafts of the motor 91 are all driven and connected to each other. A rod 92, the connecting rod 92 is drivingly connected to the first base 7 and the second base 8 corresponding to each other through a transmission assembly.

The transmission assembly includes a first gear 93 and a second gear 94 coaxially connected with the connecting rod 92, and the first gear 93 and the second gear 94 mesh with the first rack 95 and the second rack 96 respectively, the first The rack 95 and the second rack 96 are fixed on the base 9 .

The first heating rod 1 and the second heating rod 5 are embedded on the first base 7 parallel to each other, and correspond to the first extrusion platform 81 and the second extrusion platform 82 on the second base 8 respectively.

Wherein the first heating rod 1 is composed of four sections of first heating wires 2, one end of each of the first heating wires 2 is respectively connected to one pole of the power supply through a relay Q2, a relay Q4 and a relay Q5, each of the first heating wires 2 The other end of the first heating wire 2 is connected to the other pole of the power supply through a switch; the control circuit controls the on and off of each of the relays and each of the switches so that each of the first heating wires 2 is energized sequentially.

In order to simplify the connection, in this embodiment, the other ends of the two first heating wires on the left side are connected to the first contacts of the SPDT switch 4, and the other ends of the two first heating wires on the right side are connected to the SPDT switch 4 another contact.

The second heating rod 5 is formed by connecting multiple sections of second heating wires 3, one end of each second heating wire 3 is connected to one pole of the power supply through relay Q1, relay Q3, and relay Q6 respectively; the two second heating wires on the left The other end of the wire 3 is connected to the first contact of the SPDT switch, and the other ends of the two second heating wires 3 on the right are connected to the other contact of the SPDT switch.

When thermal plastic sealing/thermal cutting is required, the motor reverses to drive the connecting rod to rotate forward, and the connecting rod drives the gears at both ends to rotate along the rack, so that the first base and the second base connected to the two connecting rods are aligned. Move toward; when the two touch together, squeeze the plastic film to be sealed between the two.

The control circuit controls the single-pole double-throw switch to turn on the first contact, and at the same time controls the relay Q1 and the relay Q2 to turn on, and the first heating wire and the second heating wire on the left side of the first heating rod and the second heating rod are energized , the generated heat melts the extruded film segment, the film segment corresponding to the first heating wire is melted and sealed, and is fused at the same time, and the film segment corresponding to the second heating wire is melted and bonded together. After this section of thermoplastic sealing/thermal cutting work is completed, the control circuit disconnects relay Q1 and relay Q2, closes relay Q3 and relay Q4, and closes the first heating wire and the second heating wire in the second section of the first heating wire on the left It is heated by electricity, and the extruded film segment is thermally sealed/thermally cut. After the second segment of the heating wire completes the thermal plastic sealing/thermal cutting, the control circuit keeps the relay Q3 and the relay Q4 in the closed state, and at the same time connects the single-pole double-throw switch to the second contact, and the third segment of the heating wire is energized to work.

After the third section of heating wire completes the thermal plastic sealing/thermal cutting work, the control circuit disconnects relay Q3 and relay Q4, and simultaneously closes relay Q5 and relay Q6, and the fourth section of heating wire on the right is energized to work, and the last unprocessed Film thermoforming/heat cutting.

Then the control circuit disconnects the relay Q5 and the relay Q6, the motor reverses, drives the first base and the second base to move backwards, and the first electric heating rod and the second electric heating rod are separated from the first extrusion table and the second extrusion table. The processed film can be taken out without the collision of the platform.

Claims (9)

1. A thermoplastic sealing/thermal cutting device, comprising a first heating rod (1) and a control circuit; it is characterized in that the first heating rod (1) is connected by a plurality of first heating wires (2), and each One end of the first heating wire (2) is connected to one pole of the power supply through a relay, and the other end of each of the first heating wires (2) is connected to the other pole of the power supply through a switch; The control circuit controls the on and off of each of the relays and each of the switches so that each of the first heating wires (2) is energized sequentially. 2. The thermoplastic sealing/thermal cutting device according to claim 1, characterized in that the other ends of the two first heating wires (2) are connected to the other pole of the power supply through the same switch. 3. The thermoplastic sealing/thermal cutting device according to claim 1 or 2, characterized in that it also includes a second heating rod (5), and the second heating rod (5) is connected by multiple sections of second heating wires (3) One end of each second heating wire (3) is connected to one pole of the power supply through a relay, and the other end of each second heating wire (3) is connected to the other pole of the power supply through a switch; The control circuit controls the on and off of each of the relays and each of the switches so that each of the second heating wires (3) is energized sequentially. 4. The thermoplastic sealing/thermal cutting device according to claim 3, characterized in that the other ends of the two second heating wires (3) are connected to the other pole of the power supply through the same switch. 5. The thermoplastic sealing/thermal cutting device according to claim 4, characterized in that the other ends of the two first heating wires on the first heating rod (1) are connected to the corresponding second heating rod (5). ) The other ends of the two second heating wires are connected to the other pole of the power supply through the same switch. 6. The thermoplastic sealing/thermal cutting device according to claim 5, characterized in that the first heating rod (1) and the second heating rod (5) are arranged on the first base (7) at intervals, The second base (8) has extrusion surfaces corresponding to the first heating rod (1) and the second heating rod (5); The driving device drives and connects the first base (7) and/or the second base (8), so that the first base (7) and the second base (8) face or face away from moving, so that the first heating rod (1) and the second heating rod (5) butt against their corresponding extrusion surfaces. 7. The thermoplastic sealing/thermal cutting device according to claim 6, characterized in that said driving device has two groups, all comprising a motor (91), and said motor (91) drives a connecting rod (92), said The connecting rods (92) are drivingly connected to the corresponding first bases (7) and second bases (8) through transmission components. 8. The thermoplastic sealing/thermal cutting device according to claim 7, characterized in that the transmission assembly includes a first gear (93) and a second gear (94) coaxially connected to the connecting rod (92), The first gear (93) and the second gear (94) mesh with the first rack (95) and the second rack (96) respectively, and the first rack (95) and the second rack (96) It is arranged on the base (9) and positioned relative to the base (9). 9. The thermoplastic sealing/thermal cutting device according to claim 8, characterized in that two guide rods (99) are also provided on the base (9), and the first base 7 and the second base 8 The two ends of the two guide rods (99) can be slidably limited respectively.