Automatic glue spraying equipment and method suitable for evaporator to be attached to inner container

Abstract

The invention discloses automatic glue spraying equipment and method suitable for an evaporator to be attached to an inner container, and belongs to the technical field of refrigerator manufacturing. Comprising a synchronous belt line, a glue spraying module, a positioning device and an electric control unit. The electric control unit controls the synchronous belt line, the glue spraying module and the positioning device to operate according to a set program, and automatic glue spraying of the refrigerator inner container is completed through mutual cooperation of the synchronous belt line, the glue spraying module and the positioning device. The automatic glue spraying method for attaching the evaporator to the inner container replaces a manual glue coating mode, the aluminum face on the back of the evaporator can be directly completed on a refrigerator production line at a time, the procedure of tearing off release paper is not needed, and the production efficiency is improved; and in the aspect of quality, the glue has a certain temperature after being sprayed, the initial adhesion is better, the potential quality hazard of abnormal frosting caused by poor adhesion due to temperature change is avoided, and the quality problem of the existing double-sided adhesive tape is solved to a greater extent.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator manufacturing, and in particular to an automatic glue spraying device and method suitable for attaching an evaporator to an inner container. Background Art

[0002] The evaporator is a key refrigeration component in the refrigerator. The quality of the evaporator's pasting directly determines the overall performance of the refrigerator. The double-sided tape used for the aluminum plate of the plate-tube evaporator used in direct cooling refrigerators is usually used to bond the plate-tube evaporator and the inner tank. This process has been used for more than ten years. There are the following problems in this process:

[0003] (1) Due to the problems of ambient temperature and evaporator structure deformation, the entire evaporator is prone to tilting into the foaming liquid after the double-sided tape is applied, causing abnormal frosting and affecting product performance;

[0004] (2) There is a vulcanization layer (ethylene acrylic acid copolymer) between the surface of the aluminum plate and the evaporator tube, which allows the evaporator tube and the aluminum plate to be fully bonded under certain temperature and pressure conditions and fill the gap between the aluminum plate and the evaporator tube. If the vulcanization is not good, the evaporator tube will fall off on site;

[0005] (3) Due to differences in the material, heating method, and structure of the vulcanization equipment, the vulcanization process temperature varies from manufacturer to manufacturer from 200 to 260°C. The adhesive layer of the backing adhesive is easily damaged during vulcanization, and the quality is uncontrollable.

[0006] Some companies have also developed a process of spraying glue directly onto the aluminum plate on the back of the evaporator. However, since the aluminum plate used in the evaporator is a rolled material, it needs to be cut during production. After cutting, the glue layer is damaged and the cutter is affected by the glue layer and needs to be cleaned frequently, which greatly reduces production efficiency. Summary of the invention

[0007] The purpose of the present invention is to provide an automatic glue spraying device and method suitable for attaching an evaporator to an inner liner, aiming to solve at least one of the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows:

[0008] In one aspect, the present invention provides an automatic glue spraying device suitable for attaching an evaporator to an inner liner, comprising:

[0009] A synchronous belt line, which automatically conveys the inner container of the refrigerator;

[0010] A glue spraying module, the glue spraying module is located above the synchronous belt line, and the glue spraying module automatically sprays glue on the inner liner conveyed to the bottom;

[0011] A positioning device, the positioning device is located on the synchronous belt line, and the positioning device fixes the inner liner conveyed to the bottom of the glue spraying module;

[0012] The electronic control unit, the synchronous belt line, the glue spraying module and the positioning device are all electrically connected to the electronic control unit.

[0013] As a further solution of the present invention: the positioning device includes a transverse positioning module and a longitudinal positioning module, the transverse positioning module fixes the left and right sides of the inner liner directly below the glue spraying module, and the longitudinal positioning module fixes the front and back sides of the inner liner directly below the glue spraying module.

[0014] As a further solution of the present invention: the lateral positioning module includes a left block and a right block, the left block and the right block are used to position the inner liner, and the left block and the right block are both telescopic.

[0015] As a further solution of the present invention: the longitudinal positioning module includes a side baffle and a side push positioning device, the side baffle is arranged above the synchronous belt line, the left side of the side baffle is in contact with the right baffle, the side push positioning device is arranged on one side of the synchronous belt line, and the side baffle and the side push positioning device can both be extended and retracted forward and backward.

[0016] As a further solution of the present invention: the glue spraying module includes a hot melt glue mechanism and a spray gun mechanism, the hot melt glue mechanism is used to transport hot melt glue to the spray gun mechanism, and the spray gun mechanism sprays glue on the inner liner directly below it according to set requirements.

[0017] As a further solution of the present invention: the electric control unit is an electric control cabinet.

[0018] Another aspect of the present invention provides an automatic glue spraying method suitable for attaching an evaporator to an inner container, comprising the following steps:

[0019] S1, the electronic control unit controls the synchronous belt line to transport the inner liner to be sprayed with glue to the bottom of the glue spraying module according to the set program;

[0020] S2, the electronic control unit controls the positioning device to fix the liner directly below the glue spraying module:

[0021] S3, the electronic control unit controls the glue spraying module to spray glue on the inner tank directly below according to the set program;

[0022] S4, after the inner liner glue spraying process is completed, the electronic control unit controls the synchronous belt line to transport the inner liner to the next station;

[0023] S5, attach the aluminum surface of the back of the evaporator to the glue-sprayed inner tank.

[0024] Beneficial effects of the present invention:

[0025] The present invention is provided with a synchronous belt line, a glue spraying module, a positioning device and an electronic control unit. The electronic control unit controls the synchronous belt line to automatically transport the refrigerator liner to be sprayed with glue according to a set program; the synchronous belt line first transports the refrigerator liner to be sprayed with glue to the bottom of the glue spraying module, the positioning device fixes the liner to be sprayed with glue transported to the bottom of the glue spraying module, and after the liner is fixed, the glue spraying module automatically sprays glue on the liner transported to the bottom; the automatic glue spraying method of applying the evaporator to the liner replaces the manual glue coating method, improves production efficiency, and the automatic glue spraying process sprays glue evenly and accurately, effectively saving costs. In addition, this process can make the aluminum surface on the back of the evaporator directly completed on the refrigerator production line at one time, without the process of tearing off the release paper, thereby improving production efficiency; in terms of quality, the glue has a certain temperature after spraying, and the initial adhesion is better, and there is no need for the quality risk of abnormal frosting caused by temperature changes, which solves the quality problems of the current double-sided tape to a greater extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic top view of the structure of an automatic glue spraying device suitable for attaching an evaporator to an inner tank of the present invention;

[0028] Figure 2 It is a schematic diagram of an automatic glue spraying method suitable for attaching an evaporator to an inner tank according to the present invention.

[0029] In the figure: 1. synchronous belt line; 2. inner liner; 3. left block; 4. right block; 5. side baffle; 6. side push positioning device; 7. hot melt adhesive mechanism; 8. spray gun mechanism. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that terms such as "up", "down", "left", "right", "front" and "back" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, they should not be understood as limitations on the present invention.

[0032] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figure 1 As shown, on the one hand, an embodiment of the present invention provides an automatic glue spraying device suitable for attaching an evaporator to an inner tank, comprising a synchronous belt line 1, a glue spraying module, a positioning device and an electronic control unit. The electronic control unit controls the synchronous belt line 1, the glue spraying module and the positioning device to run according to a set program, and the automatic glue spraying of the refrigerator inner tank 2 is completed through the mutual cooperation of the synchronous belt line 1, the glue spraying module and the positioning device.

[0034] Specifically, the electronic control unit controls the synchronous belt line 1 to automatically convey the refrigerator liner 2 to be sprayed with glue according to the set program; the glue spraying module is located above the synchronous belt line 1, and the synchronous belt line 1 first conveys the refrigerator liner 2 to be sprayed with glue to the bottom of the glue spraying module. The positioning device is located on the synchronous belt line 1, and the positioning device fixes the liner 2 to be sprayed with glue conveyed to the bottom of the glue spraying module. After the liner 2 is fixed, the glue spraying module automatically sprays glue on the liner 2 conveyed to the bottom.

[0035] See also Figure 1 As shown, in this embodiment, the positioning device includes a lateral positioning module and a longitudinal positioning module. The lateral positioning module fixes the left and right sides of the inner liner 2 located directly below the glue spraying module. The lateral positioning module includes a left block 3 and a right block 4. The inner liner 2 is positioned between the left block 3 and the right block 4. The left block 3 and the right block 4 are both made of elastic materials. When receiving the conditions of photoelectric sensing, they can be stretched up and down. In some embodiments, the materials of the left block 3 and the right block 4 are silicone, or nylon. The longitudinal positioning module fixes the front and back sides of the inner liner 2 located directly below the glue spraying module. The longitudinal positioning module includes a side baffle 5 and a side push positioning device 6. The side baffle 5 is arranged above the synchronous belt line 1. The left side of the side baffle 5 is in contact with the right block 4. The side push positioning device 6 is arranged on one side of the synchronous belt line 1. The side baffle 5 is made of elastic material. When receiving the conditions of photoelectric sensing, it can be stretched forward and backward. In some embodiments, the material of the side baffle 5 is silicone, or nylon. The side push positioning device 6 is made of elastic material, and can be extended and retracted forward and backward when receiving the photoelectric sensing condition. In some embodiments, the material of the side push positioning device 6 is silicone, or nylon, etc. The side baffle 5 and the side push positioning device 6 work together to fix the refrigerator liner 2 directly below the glue spraying module.

[0036] See also Figure 1 As shown, in this embodiment, the glue spraying module includes a hot melt glue mechanism 7 and a spray gun mechanism 8. The hot melt glue mechanism 7 is a device with a heating facility, which can heat the solid particles inside and keep the solid particles inside warm. The hot melt glue mechanism 7 is used to deliver hot melt glue to the spray gun mechanism 8. The spray gun module is a module with small holes. When the liner 2 is positioned by the side push positioning device 6 and the side baffle 5, the electric control cabinet controls the spray gun module to start spraying colloid after receiving the signal, and the spray gun mechanism 8 sprays the liner 2 directly below it according to the set requirements.

[0037] See also Figure 2 As shown, on the other hand, an embodiment of the present invention provides an automatic glue spraying method suitable for attaching an evaporator to an inner liner 2, which specifically includes the following steps:

[0038] The electronic control unit controls the synchronous belt line 1 to automatically convey the inner liner 2 to be sprayed with glue to the bottom of the glue spraying module according to the set program.

[0039] After the inner liner 2 is transported to the bottom of the glue spraying module, the electronic control unit controls the positioning device to fix the inner liner 2 under the glue spraying module. Specifically, the inner liner 2 is first positioned from the left and right sides under the spray gun mechanism 8 of the glue spraying module by the left block 3 and the right block 4, and then the inner liner 2 is positioned and adjusted by the side baffle 5 and the side push positioning device 6 to ensure that the inner liner 2 is pushed to the appropriate position to facilitate the spray gun mechanism 8 to spray glue.

[0040] After the inner liner 2 is fixedly positioned directly below the spray gun mechanism 8, the electronic control unit controls the glue spraying module to spray glue on the inner liner 2 directly below according to the set program.

[0041] After the glue spraying process of the inner tank 2 is completed, the electronic control unit controls the synchronous belt line 1 to transport the inner tank 2 to the next station, and the aluminum surface on the back of the evaporator is attached to the glue-sprayed inner tank 2.

[0042] In summary, the automatic glue spraying method for attaching the evaporator to the inner tank 2 replaces the manual glue coating method, improves production efficiency, and the automatic glue spraying process sprays glue evenly and accurately, effectively saving costs. In addition, this process can make the aluminum surface on the back of the evaporator directly completed in one go on the refrigerator production line, without the need for the process of tearing off the release paper, thereby improving production efficiency. In terms of quality, the glue has a certain temperature after spraying, and the initial adhesion is better. There is no need for the quality risk of abnormal frosting caused by temperature changes, which can solve the quality problems of the current double-sided tape to a greater extent.

[0043] The above is a detailed description of the preferred embodiments of the present invention, which cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An automatic glue spraying device suitable for attaching an evaporator to an inner liner, characterized in that: include: A synchronous belt line (1), wherein the synchronous belt line (1) automatically transports an inner container (2) of a refrigerator; A glue spraying module, the glue spraying module is located above the synchronous belt line (1), and the glue spraying module automatically sprays glue on the inner liner (2) transported directly below; A positioning device, the positioning device is located on the synchronous belt line (1), and the positioning device fixes the inner liner (2) transported to the bottom of the glue spraying module; The electronic control unit, the synchronous belt line (1), the glue spraying module, and the positioning device are all electrically connected to the electronic control unit.

2. The automatic glue spraying device for attaching the evaporator to the inner tank according to claim 1, characterized in that: The positioning device comprises a transverse positioning module and a longitudinal positioning module, wherein the transverse positioning module fixes the left and right sides of the inner liner (2) directly below the glue spraying module, and the longitudinal positioning module fixes the front and back sides of the inner liner (2) directly below the glue spraying module.

3. The automatic glue spraying device for attaching the evaporator to the inner tank according to claim 2, characterized in that: The lateral positioning module comprises a left block (3) and a right block (4), and the left block (3) and the right block (4) are used to position the inner liner (2), and the left block (3) and the right block (4) are both telescopically movable up and down.

4. The automatic glue spraying device for attaching the evaporator to the inner tank according to claim 3, characterized in that: The longitudinal positioning module comprises a side baffle (5) and a side push positioning device (6); the side baffle (5) is arranged above the synchronous belt line (1); the left side of the side baffle (5) is in contact with the right baffle (4); the side push positioning device (6) is arranged on one side of the synchronous belt line (1); and the side baffle (5) and the side push positioning device (6) are both retractable forward and backward.

5. The automatic glue spraying device for attaching the evaporator to the inner tank according to claim 1, characterized in that: The glue spraying module comprises a hot melt glue mechanism (7) and a spray gun mechanism (8), wherein the hot melt glue mechanism (7) is used to transport hot melt glue to the spray gun mechanism (8), and the spray gun mechanism (8) sprays glue on the inner liner (2) directly below it according to set requirements.

6. The automatic glue spraying device for attaching the evaporator to the inner tank according to claim 1, characterized in that: The electric control unit is an electric control cabinet.

7. An automatic glue spraying method for attaching an evaporator to an inner liner, performed using an automatic glue spraying device for attaching an evaporator to an inner liner (2) as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1, the electronic control unit controls the synchronous belt line (1) to transport the inner liner (2) to be sprayed with glue to the bottom of the glue spraying module according to the set program; S2, the electronic control unit controls the positioning device to fix the inner container (2) directly below the glue spraying module: S3, the electronic control unit controls the glue spraying module to spray glue on the inner container (2) directly below according to the set program; S4, after the glue spraying process of the inner liner (2) is completed, the electronic control unit controls the synchronous belt line (1) to transport the inner liner (2) to the next station; S5, attaching the aluminum surface at the back of the evaporator to the glue-sprayed inner tank (2).

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