Full-automatic multifunctional welding machine for refrigerator sealing strip

Abstract

This invention discloses a fully automatic multi-functional welding machine for refrigerator sealing strips. Its key feature is the design of a telescopic module, comprising: a module support (1), a fixed welding mold head (2), a moving welding mold head (3), a positioning mold head (4), a positioning hole (5), an adjusting mold head (6), an adjusting hole (7), a telescopic screw (8), a telescopic motor (9), a telescopic slide rod (10), a return spring (11), a mold opening motor (12), and a guide hole (13). By cooperating with the fixed welding mold head (2) and the moving welding mold head (3), the rubber sleeve (26) can be automatically inserted into the mold. By cooperating with the positioning mold head (4) and the adjusting mold head (6), the joint size (28) of the rubber sleeve (26) can be automatically positioned. By connecting the fixed welding mold head (2) and the moving welding mold head (3) of the telescopic module through a heated glue injector (23), the automated welding and bonding of the magnetic strip (27) of the rubber sleeve (26) can be completed. This achieves fully automated production of refrigerator sealing strips.

Description

Technical Field

[0001] This invention relates to the field of refrigerator sealing strip welding technology, and more specifically to a fully automatic multi-functional welding machine for refrigerator sealing strips. Background Technology

[0002] Refrigerator door seals are mainly composed of two materials: rubber sleeves and magnetic strips. The rubber sleeves are hollow strips with elasticity that are easy to stretch or compress. The magnetic strips are solid strips with high hardness but no stretching or compressing properties. The finished refrigerator door seal consists of four magnetic strips inserted into four rubber sleeves, which are then welded together at both ends.

[0003] Because the rubber sleeve is hollow, soft, and elastic, after the rubber sleeve and magnetic strip semi-finished product are cut into the required length strips from the production line, the straightness in the length direction will have irregular deviations when gripped by the robotic arm, making it impossible to achieve automatic mold insertion and automatic positioning of the rubber sleeve and magnetic strip.

[0004] Currently, all manufacturers use a manual mold-insertion method. One hand grasps the rubber sleeve with the magnetic strip and inserts it into the welding mold through the mold inlet. The other hand reaches into the welding port of the welding mold and uses fingers to sense the position of the magnetic strip end inside the rubber sleeve and the position of the rubber sleeve end relative to the welding port to confirm the required joint size for welding. When the fingers sense a deviation in the relative position of the magnetic strip, rubber sleeve, and welding port, the other hand presses, swings, pushes, and pulls the rubber sleeve at the mold inlet to correct the relative position of the magnetic strip, rubber sleeve, and welding port to achieve the welding requirements.

[0005] A single refrigerator door seal requires four welding processes; a single defective weld will render the entire seal unusable. The cost of a batch of refrigerator door seals depends on the skill level and physical condition of the workers. This process, which relies on skilled workers to control production costs, is naturally inefficient. To reduce production costs and improve market competitiveness, achieving fully automated production is a challenge that every company is currently tackling. Summary of the Invention

[0006] To address the problem of low production efficiency caused by relying on skilled workers to determine production costs, this invention, a fully automatic multi-functional welding machine for refrigerator sealing strips, not only automatically welds the rubber sleeves but also automatically bonds the magnetic strips inside. This achieves multi-functional processing, improves production efficiency, and reduces production costs.

[0007] Compared with the prior art, the present invention has the following advantages:

[0008] 1. Existing technology involves cutting the rubber sleeve and magnetic strip before manually welding them into the mold. After being gripped by a robotic arm, the cut rubber sleeve droops and deforms irregularly at both ends, making it impossible to insert into the mold using the robotic arm; manual insertion is the only option. This invention achieves precise docking between the welding mold head and the production line mold head, enabling automatic insertion of the rubber sleeve and magnetic strip into the mold. After insertion, the parts are cut, thus realizing an automated insertion and cutting process.

[0009] 2. In existing technologies, when adjusting the joint size during rubber sleeve welding, workers can only manually insert their fingers into the mold opening to confirm the joint size based on their sense of touch and experience. If the size is too small, it will result in incomplete welding and breakage; if the size is too large, it will produce large weld beads inside the rubber sleeve, causing localized deformation and bulging. This invention can precisely control the displacement of the adjusting mold head via computer, ensuring consistent joint size every time.

[0010] 3. Existing technology cannot bond the magnetic strips inside the rubber sleeve, resulting in breakage at the beginning and end of the four magnetic strips and easy deformation and elongation of the finished product. The dimensions of each finished product are inconsistent, resulting in a low pass rate. This invention bonds the beginning and end of the four magnetic strips while welding the rubber sleeve, ensuring that the finished product dimensions are completely consistent and there is no deformation or elongation.

[0011] To achieve the above objectives, the present invention provides the following solution: a fully automatic multi-functional welding machine for refrigerator sealing strips, which mainly consists of: a telescopic module ( Figure 1 ), feeding and cutting mechanism ( Figure 2 ), welding mechanism ( Figure 3 ), transport robots ( Figure 4 ), Classification of mold materials ( Figure 6 )composition.

[0012] The telescopic module includes: module support (1), welding fixed mold head (2), welding moving mold head (3), positioning mold head (4), positioning hole (5), adjusting mold head (6), adjusting hole (7), telescopic screw (8), telescopic motor (9), telescopic slide bar (10), return spring (11), mold opening motor (12), and guide hole (13).

[0013] The feeding and cutting mechanism includes: feeding support (14), production line die head (15), cutting blade (16), positioning robotic arm (17), positioning pressure rod (18), and adjusting pressure rod (19).

[0014] The welding mechanism includes: welding base platform (20), telescopic module positioning table (21), positioning table propulsion motor (22), and heating glue injector (23).

[0015] The handling robot includes: a telescopic module transfer arm (24) and a finished product transfer arm (25).

[0016] The mold materials are categorized as follows: rubber sleeve (26), magnetic strip (27), and connector size (28). Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the telescopic module structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the feeding and cutting mechanism of the present invention;

[0019] Figure 3 This is a schematic diagram of the welding mechanism structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the handling robot structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure to be fed into the telescopic module after it has been reduced in size according to the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the rubber sleeve and magnetic strip of the present invention in the contracted state of the telescopic module;

[0023] Figure 7 This is a schematic diagram of the material to be cut after the telescopic module of the present invention has been extended;

[0024] Figure 8 This is a schematic diagram of the structure of the telescopic module of the present invention, showing the material being transferred from the cutting unit to the welding mechanism.

[0025] Figure 9 This is a schematic diagram of the structure of the telescopic module of the present invention, which is transferred to the welding mechanism for heating and glue injection after being cut;

[0026] Figure 10 This is a schematic diagram of the structure of the telescopic module of the present invention after it has been cut, transported to the welding mechanism for heating and glue injection welding;

[0027] Figure 11 This is a schematic diagram of the telescopic module in its shrunken state after it has been cut, transported to the welding mechanism for heating and glue injection welding, and is then in the telescopic module shrinkage state.

[0028] Figure 12 This is a schematic diagram of the telescopic module of the present invention after it has been cut, transported to the welding mechanism for heating and glue injection welding, and then the telescopic module has shrunk and opened.

[0029] Figure 13 A schematic diagram of the finished product transfer arm of the present invention moving above the telescopic module to prepare for material removal and demolding;

[0030] Figure 14 This is a schematic diagram of the finished product transfer arm structure for gripping finished products according to the present invention;

[0031] Figure 15 This is a diagram showing the initial state of each module and robotic arm after the finished product of this invention has been transferred to the finished product area. Implementation

[0032] First, the telescopic module ( Figure 1 Functional description:

[0033] 1. The base of the welded mold head (2) is fixed on the module support (1). It can only open and close and cannot slide at both ends of the telescopic slide rod (10).

[0034] 2. The welding moving mold head (3) can open and close. Its base is designed with a nut and is matched with the telescopic screw (8). Under the drive of the telescopic motor (9), it can reciprocate on the telescopic slide rod (10).

[0035] 3. The base of the positioning mold head (4) is not nut controlled by the telescopic screw (8). Under the action of the reciprocating motion of the welding moving mold head (3) and the rebound force of the reset spring (11), it can slide back and forth on the telescopic slide rod (10) and can perform opening and closing actions. When the positioning pressure rod (18) is inserted into the positioning hole (5), it can press and lock the magnetic strip (27) of the internal rubber sleeve (26).

[0036] 4. The adjusting mold head (6) is located on both sides of the positioning mold head (4). The base is not nut-free and is not controlled by the telescopic screw (8). Under the action of the reciprocating motion of the welding moving mold head (3) and the rebound force of the reset spring (11), it can slide back and forth on the telescopic slide rod (10) and can perform opening and closing actions. When the adjusting pressure rod (19) is inserted into the adjusting hole (7), it can press and lock the internal rubber sleeve (26) and exert no force on the magnetic strip (27).

[0037] The technical solutions and mechanical movements in the embodiments of the present invention will be explained in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Other embodiments obtained by those skilled in the art without creative improvement are all within the scope of protection of the present invention. The implementation of these functions will be described one by one in two ways with reference to the above drawings.

[0038] The first method is to control the positioning mold (4) and the adjusting mold (6) to compress the rubber sleeve (26) and then cut to obtain the joint size (28).

[0039] After the robotic arm's finished product transfer arm (25) transfers the welded sealing strip from the telescopic module to the finished product area, the robotic arm's module transfer arm (24) transfers the telescopic module, which is in a closed, retracted state, onto the feeding support (14), such as Figure 5 As shown, at this time, the welding fixed mold head (2) is precisely connected with the production line mold head (15), and the rubber sleeve (26) coming from the production line mold head (15) can precisely extend into the welding fixed mold head (2) and move forward to the required size before stopping, as shown. Figure 6As shown, the telescopic motor (9) then starts and pushes the welding moving mold head (3) to slide to the other end, while the return spring (11) releases energy and pushes the positioning mold head (4) and the adjusting mold head (6) to slide back to their initial positions, as shown. Figure 7 As shown.

[0040] After the positioning mold (4) and the adjusting mold (6) stop at their initial positions, the positioning robot arm (17) starts to insert the positioning pressure rod (18) and the adjusting pressure rod (19) into the positioning hole (5) and the adjusting hole (7) respectively. Then, the adjusting pressure rods (19) on both sides of the positioning pressure rod (18) move towards the middle at the same time, and drive the adjusting molds (6) on both sides to move towards the middle. At this time, the adjusting mold (6) and the rubber sleeve (26) are in a clamped state, forcing the two ends of the rubber sleeve (26) to compress towards the middle.

[0041] After the rubber sleeve (26) is compressed to the joint size required for welding, two cutting blades (16) that are at a 45-degree angle relative to the length direction of the rubber sleeve (26) and are in close contact with the welding fixed mold head (2) and the welding moving mold head (3) start and rise to cut the rubber sleeve (26) and the magnetic strip (27).

[0042] After cutting, the two cutting blades (16) stop and lower to reset. Then, the robotic arm (17) restarts, pulls out the positioning pressure rod (18) and the adjusting pressure rod (19) to release the pressure, and the compressed rubber sleeve (26) quickly springs back and extends out of the die opening to form the joint size (28). Because the magnetic strip (27) is made of incompressible material with strong hardness and is not pulled by the adjusting die head (6), both ends are still flush with the die head opening, and the size of the rubber sleeve (26) springing back out of the die opening is exactly the joint size (28) required for welding. Figure 8 As shown.

[0043] After the rubber sleeve (26) is inserted into the mold and unloaded, the robotic module transfer arm (24) is activated to transfer the telescopic module to the telescopic module positioning table (21). After the four telescopic modules are transferred into place, the four heating glue injectors (23) rise to heat the end face of the rubber sleeve (26), and at the same time, quick-drying glue is applied to the end face of the magnetic strip (27). Figure 9 As shown.

[0044] After the heating and dispensing of adhesive is completed, the heating dispensing device (23) descends rapidly, and the positioning table propulsion motor (22) immediately starts and moves the four sets of telescopic modules toward the center of the matrix. The four sets of welding fixed mold heads (2) and the four sets of welding moving mold heads (3) are connected end to end to complete the welding of the rubber sleeve (26) and the bonding of the magnetic strip (27). At the same time, the drilling machine is started to drill ventilation holes for the rubber sleeve (26) through the guide hole (13). Figure 10 As shown.

[0045] After the rubber sleeve (26) is welded and the magnetic strip (27) is bonded, the four telescopic motors (9) are started, the four telescopic screws (8) rotate and drive the four sets of welding moving mold heads (3) to move to the other end, and drive the four sets of adjusting mold heads (6) and positioning mold heads (4) to move in the same direction, and the return spring (11) is compressed to store energy, completing the telescopic module shrinking process, such as Figure 11 As shown.

[0046] After the four sets of telescopic modules are reduced in size, the mold opening motor (12) starts, and all the welding fixed mold heads (2), welding moving mold heads (3), positioning mold heads (4), and adjusting mold heads (6) open simultaneously. Figure 12 As shown.

[0047] After all mold heads are opened, the robotic arm (25) moves to above the welding mechanism and grabs the finished product sealing strip for demolding. Figure 13 As shown.

[0048] After the sealing strip is demolded, it is transferred to the finished product area by the finished product transfer arm (25). At the same time, the mold opening motor (12) starts again to close all the welding fixed mold head (2), welding moving mold head (3), positioning mold head (4), and adjusting mold head (6) simultaneously. The push motor (22) starts again to reset the telescopic module positioning table (21), completing the entire automated operation. Figure 15 As shown.

[0049] The second method is to obtain the joint size (28) by controlling the cutting blade (16) to cut first and then controlling the positioning mold head (4) and the adjusting mold head (6) to stretch the rubber sleeve (26).

[0050] After the robotic arm's finished product transfer arm (25) transfers the welded sealing strip from the telescopic module to the finished product area, the robotic arm's module transfer arm (24) transfers the telescopic module, which is in a closed, retracted state, onto the feeding support (14), such as Figure 5 As shown, at this time, the welding fixed mold head (2) is precisely connected with the production line mold head (15), and the rubber sleeve (26) coming from the production line mold head (15) can precisely extend into the welding fixed mold head (2) and move forward to the required size before stopping, as shown. Figure 6 As shown, the telescopic motor (9) then starts and pushes the welding moving mold head (3) to slide to the other end, while the return spring (11) releases energy and pushes the positioning mold head (4) and the adjusting mold head (6) to slide back to their initial positions, as shown. Figure 7 As shown.

[0051] After the positioning mold head (4) and the adjusting mold head (6) stop at the initial position, the two cutting blades (16) that are at a 45-degree angle relative to the length direction of the rubber sleeve (26) and are closely attached to the mold opening of the fixed mold head (2) and the mold opening of the moving mold head (3) start and rise to cut the rubber sleeve (26) and the magnetic strip (27). After cutting, the end face of the rubber sleeve (26) and the end face of the magnetic strip (27) are flush with the mold opening.

[0052] After cutting, the two cutting blades (16) stop and descend to reset. Then, the robotic module transfer arm (24) starts to transfer the telescopic module to the telescopic module positioning table (21). After the four telescopic modules are transferred to their positions, the corresponding four robotic positioning arms (17) start to insert the positioning rod (18) and the adjusting rod (19) into the positioning hole (5) and the adjusting hole (7) respectively. Then, the adjusting rods (19) on both sides of the positioning rod (18) move to both ends at the same time, and drive the adjusting mold heads (6) on both sides to move to both ends. At this time, the adjusting mold head (6) and the rubber sleeve (26) are in a clamped state, forcing the rubber sleeve (26) to stretch to both ends and extend out of the mold opening to form the joint size (28). Figure 8 As shown.

[0053] After the rubber sleeve (26) extends out of the mold opening to form the joint size (28), four sets of heated glue injectors (23) rise to heat the end face of the rubber sleeve (26), and at the same time, quick-drying glue is applied to the end face of the magnetic strip (27), such as Figure 9 As shown.

[0054] After the heating and dispensing process is completed, the heating dispensing device (23) descends rapidly, and the positioning table propulsion motor (22) immediately starts and moves the four telescopic modules toward the center of the matrix. The four sets of welded fixed mold heads (2) and the four sets of welded moving mold heads (3) are connected end to end to complete the welding of the rubber sleeve (26) and the bonding of the magnetic strip (27). Figure 10 As shown.

[0055] After welding is completed, the four sets of telescopic modules are restarted with the corresponding four sets of robotic arms (17). The positioning rod (18) and the adjusting rod (19) are pulled out from the positioning hole (5) and the adjusting hole (7) respectively. At the same time, the drill is started to drill a ventilation hole in the rubber sleeve (26) through the guide hole (13).

[0056] After the rubber sleeve (26) is welded and the magnetic strip (27) is bonded, the four telescopic motors (9) are started, the four telescopic screws (8) rotate and drive the four sets of welding moving mold heads (3) to move to the other end, and drive the four sets of adjusting mold heads (6) and positioning mold heads (4) to move in the same direction, and the return spring (11) is compressed to store energy, thus completing the telescopic module shrinking process, such as Figure 11 As shown.

[0057] After the four sets of telescopic modules are reduced in size, the mold opening motor (12) starts, and all the welding fixed mold heads (2), welding moving mold heads (3), positioning mold heads (4), and adjusting mold heads (6) open simultaneously. Figure 12 As shown.

[0058] After all mold heads are opened, the robotic arm (25) moves to above the welding mechanism and grabs the finished product sealing strip for demolding. Figure 13 As shown.

[0059] After the sealing strip is demolded, it is transferred to the finished product area by the finished product transfer arm (25). At the same time, the mold opening motor (12) starts again to close all the welding fixed mold head (2), welding moving mold head (3), positioning mold head (4), and adjusting mold head (6) simultaneously. The push motor (22) starts again to reset the telescopic module positioning table (21), completing the entire automated operation. Figure 15 As shown.

[0060] The above two schemes are two descriptions of the implementation of this invention. These descriptions are not restrictive. To facilitate a simple explanation of the principle through drawings, all opening, closing, advancing, and retreating movements shown in the accompanying drawings are designed to be driven by servo motors. In practical applications, cylinders, linear motors, hydraulic cylinders, etc., can be used to achieve various movements. Those skilled in the art, inspired by this, who design similar embodiments without departing from the spirit of this invention, are all within the protection scope of this invention.

Claims

1. A full-automatic multifunctional welding machine for refrigerator sealing strips, characterized in that A telescopic module was designed, which has the characteristic of being able to be picked up by a robotic arm or transported to another scene for the next process; the telescopic module is characterized by comprising: module support (1), welding fixed mold head (2), welding moving mold head (3), positioning mold head (4), positioning hole (5), adjusting mold head (6), adjusting hole (7), telescopic screw (8), telescopic motor (9), telescopic slide rod (10), return spring (11), mold opening motor (12), and guide hole (13); the welding fixed mold head (2) of the telescopic module cooperates with the welding moving mold head (3) and the assembly line mold head (15) to realize the fully automated mold insertion of the rubber sleeve (26); the fixed mold head (2) of the telescopic module cooperates with the welding moving mold head (3) and the assembly line mold head (15) to realize the fully automated mold insertion of the rubber sleeve (26); the telescopic module's fixed mold head (2) is equipped with a mechanical arm or transported to another scene for the next process. The positioning mold head (4) and the adjusting mold head (6) work together to automatically position the joint size (28) by stretching or compressing the rubber sleeve (26); the telescopic module welding fixed mold head (2) and the welding moving mold head (3) are connected end to end by heating and injecting glue through the heating glue injector (23), which can complete the automatic welding and bonding of the rubber sleeve (26) and the magnetic strip (27); the base of the welding fixed mold head (2) is fixed on the module support (1), and it can only open and close and cannot slide at both ends of the telescopic slide rod (10); the welding moving mold head (3) can open and close, and its base is designed with a nut and matched with the telescopic screw (8). Under the drive of the telescopic motor (9), it can reciprocate on the telescopic slide rod (10); The base of the positioning mold (4) is not nut-free and is not controlled by the telescopic screw (8). Under the action of the reciprocating motion of the welding moving mold (3) and the rebound force of the return spring (11), it can slide back and forth on the telescopic slide rod (10) and can perform opening and closing actions. The positioning pressure rod (18) is inserted into the positioning hole (5). The positioning hole (5) is set on the positioning mold (4) and can press and lock the magnetic strip (27) of the internal rubber sleeve (26). The adjusting mold (6) is located on both sides of the positioning mold (4). The base is not nut-free and is not controlled by the telescopic screw (8). Under the action of the reciprocating motion of the welding moving mold (3) and the rebound force of the return spring (11), it can slide back and forth on the telescopic slide rod (10) and can perform opening and closing actions. The adjusting pressure rod (19) is inserted into the adjusting hole (7). The adjusting hole (7) is set on the adjusting mold (6) and can press and lock the internal rubber sleeve (26) and has no effect on the magnetic strip (27).

Images