Full-automatic heat sealing equipment and method for full-automatic heat sealing of plastic box body
By using fully automated heat sealing equipment and methods, the problems of chemical sealing affecting chemically sensitive reagents and ultrasonic sealing power control have been solved, achieving efficient and reliable sealing of plastic boxes, with the ability to automatically detect leaks and quickly replace sealing heads.
Patent Information
- Application Number
- CN202410993760.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2026-01-23
AI Technical Summary
Existing technologies for sealing plastic boxes with lids may result in chemical sealing affecting chemically sensitive reagents, while ultrasonic sealing requires high power control and is difficult to achieve gas sealing effects, thus failing to achieve efficient and reliable sealing.
It adopts a fully automatic heat sealing device, which seals the plastic box by simultaneously contacting the four upper edges with the heating block. The sealing process is completed automatically by the stepper motor. Combined with the detachable sealing head and heating rod, it achieves uniform heating and temperature control. It is equipped with a leak detection unit to check the sealing performance.
It achieves high-quality and high-efficiency sealing, with a sealing success rate of over 95%, and features automatic leak detection to meet the needs of quick replacement of different boxes.
Smart Images
Figure CN121376320A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of full-automatic heat sealing equipment and the method of full-automatic heat sealing plastic box body, belong to heat sealing field. BACKGROUND
[0002] When needing to seal the plastic box body with cover, there are several options, one is to stick to seal by chemical reagent, but when there is chemical sensitive reagent in the box, the gas diffused into by chemical sealing will affect the final use.Another is to seal by ultrasonic, which can heat the plastic contact surface and fix the box, and is more used in the field of household appliances such as chargers, but if you want to achieve the effect of gas sealing, the power control of ultrasonic is required, and the current technology cannot meet the requirements. SUMMARY
[0003] In view of the shortcomings of the prior art, the present application chooses traditional heat sealing, i.e., through heating block to simultaneously contact and heat the four upper edges of the plastic box body to achieve sealing.The whole process is automatically completed by a stepping motor, realizing large-batch high-quality sealing effect, and fully meeting the needs of batch sealing.
[0004] In one aspect of the present application, a full-automatic heat sealing device is provided, which is a full-automatic heat sealing system for colorimetric array sensor, comprising:
[0005] A sealing unit, comprising a sealing head connecting rod and a sealing head fastened on the sealing head connecting rod; wherein: the sealing head is a square cover, and a square through hole I is provided along the central axis of the sealing head, and the inner side surface of the square through hole I is divided into a vertical surface and an inclined surface from top to bottom; the vertical surface and the inclined surface on the same side inner surface in the sealing head, the length of the side at the connection between the vertical surface and the inclined surface is a1, and the length of the side at the connection between the lower bottom surface of the sealing head and the inclined surface is a2, a1
[0006] A control unit for controlling the movement of the sealing unit;
[0007] A heating unit for heating the sealing unit;
[0008] And,
[0009] A fixed tray for loading and fixing the plastic box body to be sealed during heat sealing process.
[0010] Optionally, the inclined surface of the sealing head is a heating surface, and the slope structure of the heating surface realizes automatic sealing.
[0011] Optionally, the sealing head is a detachable sealing head, and the size of the sealing head is adapted to the plastic box body to be sealed.
[0012] Optionally, the slope surface is 30-45° to the vertical direction.
[0013] Optionally, the material of the sealing head is red copper, and the surface is treated by nickel plating.
[0014] Optionally, the sealing head is connected to the stepping motor by a zirconia connecting rod, so as to realize the up-down movement and accurate control of the sealing head; when the sealing head moves downward, the speed is changed by program control, and the speed is reduced when the sealing head approaches the plastic box body. The efficiency is improved, and better sealing effect is achieved; the slope design of the heating surface of the sealing head realizes high success rate of heat sealing effect; the material of the sealing head is red copper with high thermal conductivity, and the surface is treated by nickel plating, so as to realize high-temperature heating while maintaining the stability of the sealing head.
[0015] Optionally, four through holes II are arranged at the four corners of the cover body of the sealing head.
[0016] The heating unit comprises four heating rods and four thermocouples.
[0017] The heating rods and the thermocouples are installed at the through holes II.
[0018] Optionally, the sealing head is heated by four heating rods to realize uniform heating, and the temperature can be as high as 400 degrees; the temperature of the sealing head is measured by a micro thermocouple, and the temperature of the sealing head is controlled by changing the voltage at both ends of the heating rod.
[0019] Optionally, the control unit comprises a stepping motor, a stepping motor controller and an industrial computer.
[0020] The stepping motor and the stepping motor controller are connected to the industrial computer through an optocoupler.
[0021] Optionally, a fixed spring is arranged at the center of the lower surface of the sealing head. The heating tray is used to accommodate and fix the sealed box; the fixed spring plays a role in fixing the heated small box, and can realize the role of separating the small box and the sealing head after the small box is sealed and the heat sealing head is lifted, so as to avoid that the small box body is stuck and lifted.
[0022] Optionally, the full-automatic heat sealing equipment further comprises a leak detection unit, which is used to check the sealing property of the sealed plastic box body.
[0023] Optionally, the sealed box body realizes the internal gas replacement and leak detection function at the same time through a side leakage device.
[0024] Optionally, the sealed small box only needs to be manually placed on the tray, and automatic sealing can be realized by program control.
[0025] As a specific embodiment, the full-automatic heat sealing device comprises:
[0026] The stepper motor controller, the stepper motor, the sealing head connecting rod, the sealing head, the heating rod, the fixed tray, the thermocouple, the fixed spring, and the leak detection device.
[0027] The fixed spring can separate the small box and the sealing head when the small box is sealed and when the heat sealing head is lifted.
[0028] Another aspect of the present application provides a method for full-automatic heat sealing of a plastic box body, which adopts the full-automatic heat sealing device described above.
[0029] The method comprises:
[0030] (1) placing the plastic box body to be sealed on the fixed tray;
[0031] (2) controlling the sealing unit to move downward by the control unit, adjusting the downward moving speed V of the sealing unit after the lower surface of the sealing head contacts the plastic box body to be sealed, heat pressing, and completing the sealing.
[0032] Optionally, in the method, the downward moving speed V of the sealing unit is 1-5 mm / s.
[0033] Optionally, the temperature of the heat pressing is 300-350℃.
[0034] The time of the heat pressing is 300-500 ms.
[0035] The beneficial effects that can be produced by the present application include:
[0036] 1) The full-automatic heat sealing device and method provided by the present application can realize high-quality batch sealing, and the sealing effect has high repeatability after the parameters are adjusted, and the appearance is neat and consistent.
[0037] 2) The sealing head provided by the present application is detachable, and when different box bodies need to be sealed, only the sealing head needs to be designed and replaced.
[0038] 3) The full-automatic heat sealing device provided by the present application has an automatic leak detection device after sealing, which can replace the gas in the box body while detecting the leak.
[0039] 4) This application relates to a fully automatic heat sealing system for colorimetric array sensors, including a sealing head, a heating rod, a thermocouple, a servo motor and controller, a photoelectric contact switch, a heat sealing tray, a sealing head connecting rod, and an industrial control board. The automatic heat sealing system precisely controls the heater temperature and the movement speed and position of the servo motor, as well as their coordinated relationship, through an industrial control computer program. Utilizing the special structural design of the heating surface of the heating head, a one-time sealing of the plastic assembly is achieved. This equipment achieves repeatability, high efficiency, and high precision sealing requirements, with a sealing success rate greater than 95%. Attached Figure Description
[0040] Figure 1 This is a schematic diagram of the sealing head in this application.
[0041] Figure 2 This is a circuit diagram of the stepper motor drive circuit in this application.
[0042] Figure 3 This is a circuit diagram of the position sensor receiving circuit in this application.
[0043] Figure 4 This is a physical image of the actual sealed small box in the embodiments of this application.
[0044] Figure 5 This is a schematic diagram of the leak detection device in an embodiment of this application.
[0045] Figure 6 This is a schematic diagram of the fully automatic heat sealing equipment in the embodiments of this application.
[0046] List of components and reference numerals:
[0047] 1. Stepper motor controller; 2. Stepper motor; 3. Sealing head connecting rod; 4. Sealing head; 5. Heating rod; 6. Fixed tray; 7. Thermocouple; 8. Fixed spring; 9. Leak detection device. Detailed Implementation
[0048] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.
[0049] Unless otherwise specified, all raw materials used in the embodiments of this application were purchased through commercial channels.
[0050] Example 1
[0051] like Figure 6 The fully automatic heat sealing equipment shown includes a stepper motor controller 1, a stepper motor 2, a sealing head connecting rod 3, a sealing head 4, a heating rod 5, a fixed tray 6, a thermocouple 7, a fixed spring 8, and a leak detection device 9.
[0052] Sealing head such as Figure 1As shown, the sealing head 4 is designed as a hollow square structure, and a through hole is formed around the sealing head 4 for the heating rod 5. The heating rod 5 is fixed by a screw at the top m2, and the heating surface is processed as a slope with a slope angle of 20 degrees with the vertical direction (from top to bottom, the vertical surface and the heating surface are divided; the length of the side at the connection between the vertical surface and the heating surface on the same side inner surface in the sealing head 4 is a1, and the length of the side at the connection between the lower bottom surface of the sealing head and the heating surface is a2, a1 < a2). The slope is additionally processed at the four corners to achieve better corner heat sealing. The sealing head is heated by the four heating rods 5 to achieve uniform heating, and the temperature can be as high as 400 DEG C. The temperature of the sealing head is measured by the micro thermocouple 7, and the temperature of the sealing head 4 is controlled by changing the voltage at both ends of the heating rod 5.
[0053] A control unit is used for controlling the movement of the sealing unit, and comprises a stepping motor 2 and a stepping motor controller 1.
[0054] The servo motor, the stepping motor and the contact switch are connected through an optical coupler and an industrial computer single-chip microcomputer, so that the anti-interference ability of the overall system is improved, and the driving speed is improved by selecting a fast optical coupler for the pulse driving part of the servo motor and the stepping motor. Figure 2 、 Figure 3 As shown in the figure, the servo motor driving and the position switch receiving circuit of the present application are shown.
[0055] A fixed tray 6 is used for loading and fixing the plastic box body to be sealed during the heat sealing process. Figure 4 As shown in the figure, the actual sealing small box body of the device in the embodiment is shown.
[0056] The sealing head 4 is connected to the stepping motor 2 through the zirconia sealing head connecting rod 3, so as to realize the up-down movement and accurate control of the sealing head 4. When the sealing head 4 moves downward, the speed is changed through the program control method, and the speed is reduced when the sealing head 4 approaches the plastic box body. The efficiency is improved, and better sealing effect is achieved. The slope design of the heating surface of the sealing head 4 realizes high success rate of heat sealing effect. The material of the sealing head is purple copper with high thermal conductivity, and the surface is treated by nickel plating, so that the stability of the sealing head is realized during high temperature heating.
[0057] A fixed spring 8 is arranged at the center of the lower surface of the sealing head 4. The fixed tray 6 is used for loading and fixing the sealed box; the fixed spring 8 plays a role in fixing the heated small box, so as to avoid that the small box body is stuck and lifted up.
[0058] The full-automatic heat sealing equipment further comprises a leak detection device 9, which is used for checking the sealing property of the sealed plastic box body. Figure 5The leak detection device 9 is shown. When the small box body is sealed, the leak detection device moves the two nozzles into the small box by the stepping motor, one end blows air by the air pump, and the other end measures the flow rate to determine the sealing condition of the small box body, and simultaneously replaces the gas in the small box body.
[0059] Example 2
[0060] The equipment obtained in Example 1 is used for sealing:
[0061] (1) Place the plastic box body to be sealed on the fixed tray;
[0062] (2) Control the sealing unit to move down by the control unit, adjust the downward speed of the sealing unit after the lower surface of the sealing head contacts the plastic box body to be sealed, heat and press to complete the sealing.
[0063] The downward speed V of the sealing unit is set to 3 mm / s. The temperature of the heat pressing is 300℃, and the time of the heat pressing is 200 ms.
[0064] Seal 15 small boxes according to the above method, and require no leakage under 100 mL / min air inlet. In order to increase the margin, test under 500 mL / min, and all are not air leakage.
[0065] The above is only a few embodiments of the present application, and does not limit the present application in any form. Although the preferred embodiments are disclosed above, the present application is not limited thereto. Any person skilled in the art can make some changes or modifications to the above disclosed technical contents without departing from the scope of the present application, and such changes or modifications are equivalent to equivalent embodiments, and all belong to the scope of the technical solution.
Claims
1. A fully automatic heat sealing device, characterized in that, include: A sealing unit includes a sealing head connecting rod and a sealing head fastened to the sealing head connecting rod; wherein: the sealing head is a square cover, and a square through hole I is provided along the central axis of the sealing head. From top to bottom, the inner surface of the square through hole I is divided into a vertical surface and a sloped surface; the vertical surface and the sloped surface located on the same side of the inner surface of the sealing head have a side length of a1 at the connection between the vertical surface and the sloped surface, and a side length of a2 at the connection between the bottom surface of the sealing head and the sloped surface, where a1 < a2. A control unit is used to control the movement of the sealing unit; A heating unit is used to heat the sealing unit; and, A fixed tray is used to hold and secure the plastic box to be sealed during the heat sealing process.
2. The fully automatic heat sealing equipment according to claim 1, characterized in that, The angle between the slope and the vertical direction is 30° to 45°.
3. The fully automatic heat sealing equipment according to claim 1, characterized in that, The sealing head is made of copper and its surface is nickel-plated.
4. The fully automatic heat sealing equipment according to claim 1, characterized in that, The sealing head cover has through holes II at its four corners; The heating unit includes four heating rods and four thermocouples; The heating rod and the thermocouple are installed at the through hole II.
5. The fully automatic heat sealing equipment according to claim 1, characterized in that, The control unit includes a stepper motor, a stepper motor controller, and an industrial computer; The stepper motor and stepper motor controller are connected to the industrial computer via an optocoupler.
6. The fully automatic heat sealing equipment according to claim 1, characterized in that, A fixing spring is provided at the center of the lower surface of the sealing head.
7. The fully automatic heat sealing equipment according to claim 1, characterized in that, The fully automatic heat sealing equipment also includes a leak detection unit, which is used to check the sealing performance of the sealed plastic box.
8. A method for fully automatic heat-sealing of a plastic box, characterized in that, The fully automatic heat sealing equipment described in any one of claims 1 to 7 is used; The method includes: (1) Place the plastic box to be sealed on the fixed tray; (2) The sealing unit is controlled to move downward by the control unit. After the lower surface of the sealing head contacts the plastic box to be sealed, the downward speed V of the sealing unit is adjusted and hot-pressed to complete the sealing.
9. The method according to claim 8, characterized in that, In the method, the downward movement speed V of the sealing unit is 1 to 5 mm / s.
10. The method according to claim 8, characterized in that, The hot pressing temperature is 300–350°C; The hot pressing time is 300-500 ms.