Wide-width PSA glue spraying system for refrigerator U shell line

Abstract

The utility model relates to a refrigerator U shell line wide-width PSA glue spraying system which comprises a wide-width glue gun body internally provided with a glue inlet path and an air inlet path, a plurality of glue spraying modules arranged in a horizontal array are integrated in the wide-width glue gun body, the bottom of each glue spraying module is provided with a spray nozzle, and the spray nozzle is provided with an air inlet path and an air outlet path. A module glue path communicated with the glue inlet path and a module gas path communicated with the gas inlet path are arranged in the glue spraying module, an ejector pin is arranged in the center of the glue spraying module, and the ejector pin controls the module glue path to be cut off or unblocked through a pneumatic switch; a spray head glue path communicated with the module glue path and a spray head gas path communicated with the module gas path are arranged in the spray nozzle, the tail end of the spray head gas path is communicated with the spray head glue path, and a plurality of diffusion spray heads are arranged at the tail end of the spray head glue path. The high-speed intermittent pneumatic switch is adopted to control the ejector pin to stretch out and draw back in the glue spraying module, and part of residual glue in the nozzle can be sucked back under the action of the ejector pin when the pneumatic switch is switched off to avoid filament flying.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of glue spraying equipment, and particularly relates to a refrigerator U-shell line width PSA glue spraying system. BACKGROUND

[0002] The U-shell of a refrigerator refers to a basic component of a refrigerator body, namely, an integrated structure of the top and two side faces of the refrigerator, which is similar in shape to the letter "U" and thus named. The structure is mainly made of a steel plate through stamping and bending processes and is an important component of the appearance of the refrigerator. The manufacturing process of the U-shell usually adopts an automatic production line, which automatically feeds, punches, edges, turns over, roll-forms, Z-stacks, forms an edge, punches and turns over a step hole, folds an end, and bends the U-shell through a series of mechanical arms, stamping equipment, conveying devices, and other equipment, so as to finally form an integrated U-shell.

[0003] The U-shell needs to be bonded with a VIP plate on the inner walls of the two sides before being bent. The VIP plate, also known as a vacuum insulation panel, is a kind of vacuum thermal insulation material. The panel is composed of a filling core and a vacuum protective surface layer. The structure mainly consists of three parts: the core, the air layer, and the getter. Glass fibers are usually used as the core, a vacuum barrier film is used as the air separation material, and a getter material is added. After high vacuumization by a vacuum packaging machine, the VIP panel can effectively avoid heat transfer caused by air convection, so the thermal conductivity can be greatly reduced. When the VIP panel is applied in the field of household appliances such as refrigerators, the refrigerator becomes thinner, has a larger space, maintains a constant temperature for a long time, consumes less energy, and is more environmentally friendly.

[0004] In the traditional process, the bonding of the VIP on the U-shell is carried out in the following way: the VIP is rolled by an offline roller glue machine, and then manually pasted on the U-shell line body by a trolley. In recent years, there have also been attempts to use online spraying of two-component polyurethane glue to automatically bond the VIP on the U-shell. For example, patent CN118179844A discloses a glue spraying and pressing device for U-shell processing. Before pressing the U-shell and the VIP plate, the VIP plate can be directly coated with glue by the glue coating part, reducing the process of tearing off the isolation paper and further reducing the cost of workpiece manufacturing. However, it is found in practice that the two-component polyurethane glue spraying cannot provide sufficient bonding force in low temperature winter environment. In addition, due to the complexity of the glue spraying process, it is very difficult to control the spraying process. When using ordinary glue spraying guns to spray two-component polyurethane, a large amount of flying silk is generated on site, which is difficult to clean and even cannot continue production. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of providing a refrigerator U-shell line width PSA glue spraying system, which is integrated into the U-shell line of the user, avoids the generation of flying silk during glue spraying, reduces the cleaning frequency, and improves the overall production efficiency.

[0006] The utility model discloses a technical scheme that solves its technical problem is provided with a kind of refrigerator U shell line width PSA glue system of spraying, including wide width glue gun body, the wide width glue gun body is equipped with glue road and air inlet gas path in, the wide width glue gun body is integrated with several horizontal array arrangement glue spraying module, the bottom of the glue spraying module is equipped with nozzle, the glue spraying module is equipped with the module glue road that is communicated with the glue road and the module gas path that is communicated with the air inlet gas path, the center of the glue spraying module is equipped with thimble, the thimble is controlled by pneumatic switch to cut off or open the module glue road, the nozzle is equipped with the nozzle glue road that is communicated with the module glue road and the nozzle gas path that is communicated with the module gas path, the end of the nozzle gas path is communicated with the nozzle glue road, the end of the nozzle glue road is equipped with several diffusion nozzles.

[0007] Preferably, the bottom of the wide width glue gun body is provided with a moving cylinder, the movable end of the moving cylinder is connected with a glue receiving groove, and the moving cylinder can move the glue receiving groove to the bottom of the nozzle to shield the nozzle.

[0008] Preferably, the upper part of the thimble is provided with a limiting disc, the limiting disc is matched with a limiting groove arranged in the glue spraying module, the upper surface of the limiting disc is communicated with the gas opening gas path of the pneumatic switch, the lower surface of the limiting disc is communicated with the gas closing gas path of the pneumatic switch, and the gas opening gas path and the gas closing gas path are respectively controlled by the electromagnetic valve arranged on the wide width glue gun body.

[0009] Preferably, the lower part of the limiting disc is provided with two auxiliary closing springs, one end of the auxiliary closing spring abuts against the lower surface of the limiting disc, and the other end abuts against the glue spraying module.

[0010] Preferably, the module gas path is externally provided with a heating device and a temperature sensor.

[0011] Preferably, the side surface of the wide width glue gun body is provided with a detachable protective grille.

[0012] Preferably, the nozzle is made of a plurality of reinforced stainless steel sheets of different groove types stacked and fixed.

[0013] The utility model has the beneficial effects that: the utility model uses high-speed intermittent pneumatic switch to control the thimble to stretch and retract in the glue spraying module, and when the switch is turned off, the thimble can suck back part of the residual glue in the nozzle to avoid flying silk. In addition, the utility model sets the wide width glue spraying head as a plurality of glue spraying modules arranged side by side, controls the number of glue spraying modules to be opened according to needs to control the width, and the glue spraying head does not need to be replaced to adapt to the processing line of U shell of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of refrigerator U shell line width PSA glue system stereo Figure One .

[0015] Figure 2 A three-dimensional PSA adhesive spraying system for a refrigerator U-shell line. Figure Two .

[0016] Figure 3 for Figure 1 Enlarged cross-sectional view of the spray adhesive module.

[0017] Figure 4 for Figure 1 Magnified exploded view of the nozzle.

[0018] The components are as follows: 1-Wide glue gun body; 101-Glue inlet path; 102-Air inlet path; 103-Glue gun socket; 2-Glue spraying module; 201-Module glue path; 202-Module air path; 203-Ejector pin; 204-Air-on path; 205-Air-off path; 206-Limiting plate; 207-Limiting groove; 208-Auxiliary closing spring; 3-Nozzle; 301-Nozzle glue path; 302-Nozzle air path; 4-Solenoid valve; 401-Air storage channel; 5-Moving cylinder; 501-Glue receiving groove; 601-Front protective grille; 602-Left protective grille; 603-Right protective grille.

[0019] The same markings in each diagram represent the same component. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] like Figure 1 , 2 As shown, this utility model provides a wide-width PSA adhesive spraying system for refrigerator U-shell lines, including a wide-width glue gun body 1. The wide-width glue gun body 1 is provided with an adhesive inlet path 101 and an air inlet path 102. The wide-width glue gun body 1 integrates several horizontally arrayed glue spraying modules 2. The bottom of the glue spraying module 2 is provided with a nozzle 3. The glue spraying module 2 is provided with a module glue path 201 communicating with the adhesive inlet path and a module air path 202 communicating with the air inlet path 102. The center of the glue spraying module 2 is provided with a ejector pin 203. The ejector pin 203 is controlled by a pneumatic switch to cut off or open the module glue path 201. The nozzle 3 is provided with a nozzle glue path 301 communicating with the module glue path 201 and a nozzle air path 302 communicating with the module air path 202. The end of the nozzle air path 302 is connected to the nozzle glue path 301. The end of the nozzle glue path 301 is provided with several diffusion nozzles.

[0022] The glue inlet channel 101 is connected with a PSA hot melt glue machine, and the PSA hot melt glue machine provides flow state PSA glue for the whole system. The air inlet channel 102 is connected with a compressed gas tank, and the compressed gas tank provides atomized gas for the whole system. The electromagnetic valve 4 is connected with the gas storage channel 401, and the gas storage channel 401 is connected with the compressed gas tank and provides working gas for the pneumatic switch. The electromagnetic valves in the system are electrically connected with the control system through the glue gun socket 103.

[0023] In a specific embodiment, the width of the glue spraying module 2 and the nozzle 3 is 25 mm, the product specification can be switched according to the width of 25 mm, 28 sets of glue spraying modules 2 are configured for one equipment, the maximum glue spraying width can be customized within 700 mm, one electromagnetic valve 4 is configured for every two glue spraying modules 2, and an independent atomized gas channel is arranged for the nozzle 3 according to the need, the atomized gas channel is also provided with a start-stop electromagnetic valve 4, so as to be closed in time when the production is stopped, all electromagnetic valves 4 are synchronously linked with the production system, and the residual glue in the nozzle 3 is avoided from being blown away.

[0024] In a specific embodiment, the bottom of the wide-width glue gun body 1 is provided with a moving air cylinder 5, the moving end of the moving air cylinder 5 is connected with a glue receiving groove 501, and the moving air cylinder 5 includes an extended state and a retracted state. In normal production, the moving air cylinder 5 is in the retracted state and located behind the nozzle 3, so as to avoid shielding the nozzle 3 and affecting the production; when the production is stopped, the moving air cylinder 5 is in the extended state, the glue receiving groove 501 is extended and can shield the nozzle 3, and the glue discharge is facilitated.

[0025] In a specific embodiment as shown in the drawings, Figure 3 In a specific embodiment as shown in the drawings, the ejector pin 203 can move up and down along the height direction of the glue spraying module 2, the upper portion of the ejector pin 203 is provided with a limiting disc 206, the limiting disc 206 is matched with a limiting groove 207 arranged in the glue spraying module 2, the upper surface of the limiting disc 206 is communicated with the gas opening channel 204 of the pneumatic switch, the lower surface of the limiting disc 206 is communicated with the gas closing channel 205 of the pneumatic switch, and the gas opening channel 204 and the gas closing channel 205 are respectively controlled to be opened and closed through the electromagnetic valve 4 arranged on the wide-width glue gun body 1.

[0026] The lower part of the limiting disc 206 is provided with two auxiliary closing springs 208, one end of the auxiliary closing spring 208 abuts against the lower surface of the limiting disc 206, and the other end abuts against the glue spraying module 2. When the electromagnetic valve 4 controls the gas opening gas path 204 to be disconnected, the gas closing gas path 205 is unobstructed, the ejector pin 203 is upwardly movable to disconnect the module glue path 201, and the auxiliary closing spring 208 can further improve the reaction speed when the gas in the gas closing gas path 205 does not completely act on the limiting disc 206, so that the module glue path 201 is quickly and cleanly closed without tailing and wire drawing.

[0027] In a specific embodiment, the module gas path 202 is externally provided with a heating device and a temperature sensor, so that the temperature of the atomizing gas entering the nozzle gas path 302 can quickly blow away the PSA glue flow.

[0028] In a specific embodiment, the side surface of the wide-width glue gun body 1 is provided with a detachable protective grille. In a specific embodiment, the protective grille includes a left protective grille 602 and a right protective grille 603 respectively arranged at the two ends of the wide-width glue gun body 1 in the length direction, and a front protective grille 601 arranged on the side of the wide-width glue gun body 1 provided with the nozzle 3. The protective grille is used to prevent the operator from being scalded by high temperature, and on the other hand, to avoid the accidental flying of the flying silk from affecting the U-shell processing line.

[0029] In a specific embodiment as shown in the drawings, Figure 4 In a specific embodiment as shown in the drawings,

[0030] The utility model further provides a refrigerator U shell processing line similar to prior art CN118179844A, including the conveying belt for conveying U shell processing board, the conveying belt is sequentially equipped with glue spraying part and pressing part along the conveying direction, wherein the glue spraying part adopts the refrigerator U shell line wide-width PSA glue spraying system as shown in the drawings, Figure 1 、 2 The surface of the U shell processing board conveyed to the glue coating position by the conveying belt is subjected to glue spraying treatment by the nozzle. The wide-width glue gun body 1 can be fixed above the conveying belt of the refrigerator U shell processing line by a round rod.

[0031] The working process is as follows: during work, the U-shell is quickly conveyed to the first belt line of the system, and after deceleration and positioning, it slowly approaches the refrigerator U-shell line wide PSA glue spraying system. The sensor detects the U-shell plate, and the refrigerator U-shell line wide PSA glue spraying system starts to spray glue at the predetermined position. At this time, the speeds of the first and second belt lines of the system are kept synchronous. At the same time, the VIP loading mechanical arm grabs the VIP plate and moves to the waiting position for pasting. After the U-shell product completely enters the second belt line and completes positioning after the glue spraying is completed, the mechanical arm descends, and the VIP plate completes pasting. Then the product is quickly conveyed backward, and the roller pressing cylinder descends to complete the roller pressing, and the whole process flow is completed.

Claims

1. A refrigerator U-shell line width width spraying PSA glue system, characterized in that, The wide-width glue gun body is internally provided with a glue inlet channel and an air inlet channel, a plurality of horizontally arrayed glue spraying modules are integrated in the wide-width glue gun body, and the bottom of each glue spraying module is provided with a nozzle, The glue spraying module is internally provided with a module glue channel communicated with the glue inlet channel and a module air channel communicated with the air inlet channel, the center of the glue spraying module is provided with a thimble, and the thimble controls the cutting or unblocking of the module glue channel through a pneumatic switch, The nozzle is internally provided with a nozzle glue channel communicated with the module glue channel and a nozzle air channel communicated with the module air channel, the end of the nozzle air channel is communicated with the nozzle glue channel, and the end of the nozzle glue channel is provided with a plurality of diffusion nozzles.

2. The refrigerator U-shell line width wide spraying PSA glue system according to claim 1, characterized in that, The bottom of the wide-width glue gun body is provided with a moving air cylinder, the movable end of the moving air cylinder is connected with a glue receiving groove, and the moving air cylinder can move the glue receiving groove to the bottom of the nozzle to shield the nozzle.

3. The refrigerator U-shell line width wide spraying PSA glue system according to claim 1, characterized in that, The upper part of the thimble is provided with a limiting disc matched with a limiting groove arranged in the glue spraying module, the upper surface of the limiting disc is communicated with an air opening channel of the pneumatic switch, the lower surface of the limiting disc is communicated with an air closing channel of the pneumatic switch, and the air opening channel and the air closing channel are respectively controlled by an electromagnetic valve arranged on the wide-width glue gun body.

4. The refrigerator U-shell line width wide spraying PSA glue system according to claim 3, characterized in that, The lower part of the limiting disc is provided with two auxiliary closing springs, one end of each auxiliary closing spring abuts against the lower surface of the limiting disc, and the other end abuts against the glue spraying module.

5. The refrigerator U-shell line width wide spraying PSA glue system according to claim 1, characterized in that, The module air channel is externally provided with a heating device and a temperature sensor.

6. The refrigerator U-shell line width wide spraying PSA glue system according to claim 1, characterized in that, The side surface of the wide-width glue gun body is provided with a detachable protective grille.

7. The refrigerator U-shell line width wide spraying PSA glue system according to claim 1, characterized in that, The nozzle is made of a plurality of different groove-shaped reinforced stainless steel sheets stacked and fixed.

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