Hot melt glue coating device and process thereof

Abstract

The application discloses a hot melt adhesive gluing equipment, which comprises a rack, a shell arranged on the rack, a conveying belt, a powder discharging mechanism, a recycling and shaping mechanism, a heating box and an oven, the conveying belt penetrates through the shell, and the shell is provided with an inlet and an outlet in the conveying direction of the conveying belt; the powder discharging mechanism is arranged at the inlet and comprises a hopper, a powder outlet of the hopper is aligned with the conveying belt, the recycling and shaping mechanism comprises an air extractor and a blowing pipe, the air extractor is arranged between the inlet and the outlet and has an upward suction force on the hot melt adhesive particles, and the blowing pipe is arranged at the outlet and has a downward blowing force on the hot melt adhesive particles. Compared with the prior art, the application can avoid irritating odor during gluing.

Description

Technical Field

[0001] This invention relates to the field of heat transfer trademarks, specifically to a hot melt adhesive application device and process. Background Technology

[0002] To improve the efficiency of labeling items such as clothing and bags, heat transfer labels have been developed. This allows clothing and bag manufacturers to purchase labels from manufacturers and then quickly apply them in their own factories using a single heat transfer machine, significantly improving the manufacturing efficiency of finished garments and bags. Heat transfer labels consist of a layer of hot melt adhesive. Current application methods involve mixing the hot melt adhesive with a solvent and then screen printing. However, because the solvent contains cyclohexanone, which emits a pungent odor, working in an environment filled with this odor can harm workers' health.

[0003] In view of this, the applicant conducted in-depth research on the above-mentioned issues, which led to this case. Summary of the Invention

[0004] The main objective of this invention is to provide a hot melt adhesive application device that avoids generating an irritating odor.

[0005] A hot melt adhesive application device includes a frame and a housing mounted on the frame, a conveyor belt, a powder discharging mechanism, a recycling and shaping mechanism, a heating chamber and an oven, and the conveyor belt passing through the housing, with an inlet and an outlet in the direction of the conveyor belt's travel. The powder discharging mechanism is located at the inlet and includes a hopper with its outlet aligned with the conveyor belt. The recycling and shaping mechanism includes a blower and an air blowing pipe. The blower is located between the inlet and the outlet and exerts an upward suction force on the hot melt adhesive particles, while the air blowing pipe is located at the outlet and exerts a downward blowing force on the hot melt adhesive particles.

[0006] Furthermore, the powder discharging mechanism also includes a motor, a drive gear, a driven gear, and two opposing rotating rollers. The motor drives the drive gear to rotate, and the drive gear meshes with the driven gear. The two rollers are respectively connected to the drive gear and the driven gear. Each roller surface has several material distribution plates, which are arranged circumferentially along the roller and extend along the length of the roller. The powder outlet of the hopper is located directly above the two rollers. The several material distribution plates on the two rollers are arranged axially symmetrically with the center line of the powder outlet as the axis of symmetry.

[0007] Furthermore, the powder discharge mechanism also includes a cylinder, a shaft rail, and several powder discharge pipes. The shaft rail is fixed on the outer shell, and the cylinder drives several powder discharge pipes to move repeatedly on the shaft rail. The several powder discharge pipes are located in the hopper and arranged along the direction of the conveyor belt.

[0008] Furthermore, the powder dispensing mechanism also includes a support base and a connecting plate, with several powder dispensing pipes arranged on the support base. The two ends of the connecting plate are connected to the support base and the piston rod of the cylinder, respectively, and the connecting plate is provided with shaft holes for the shaft rail to pass through.

[0009] Furthermore, the exhaust fan is fixed to the outer casing, and the suction force is greater than the weight of the hot melt adhesive particles and less than the weight of the labeling carrier and the adhesive force of the labeling carrier to the hot melt adhesive particles.

[0010] Furthermore, the outlet of the exhaust fan is also connected to a collection box for recycling hot melt adhesive particles.

[0011] Furthermore, the air blowing pipe is fixed on the frame and the air blowing port is positioned directly opposite the conveyor belt.

[0012] The present invention also provides a hot melt adhesive application process, which includes the following steps:

[0013] ① Place the label carrier to be glued on the conveyor belt;

[0014] ② Spray hot melt adhesive granules onto the label carrier to be glued;

[0015] ③ Start the exhaust fan to remove the hot melt adhesive particles scattered outside the label carrier;

[0016] ④ Activate the air blowing pipe and blow air onto the label carrier to make the hot melt adhesive particles on the surface of the label carrier adhere tightly to the label carrier;

[0017] ⑤ Heat the hot melt adhesive particles to melt them;

[0018] ⑥ Dry the labeling carrier.

[0019] With the above structure, the present invention relates to a hot melt adhesive application equipment and process, which sprinkles hot melt adhesive particles on the surface of the label carrier, and then heats, melts and dries the hot melt adhesive particles, thus completing the adhesive application step of the label carrier, replacing the screen printing method. Compared with the prior art, it effectively avoids the emission of irritating odors, greatly improves the working environment of workers, and is beneficial to workers' health. Attached Figure Description

[0020] Figure 1 This is a perspective view of the external structure of the present invention.

[0021] Figure 2 This is another perspective view of the external structure of the present invention.

[0022] Figure 3 This is a side sectional view of the structure of the present invention.

[0023] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle.

[0024] Figure 5 This is a top view of the roller drive structure of the present invention.

[0025] In the picture:

[0026] Frame-1; Casing-2; Inlet-21; Outlet-22; Conveyor Belt-3; Powder Discharge Mechanism-4;

[0027] Motor-41; Drive gear-42; Driven gear-43; Circular roller-44; Material divider-441;

[0028] Feed hopper - 45; Powder outlet - 451; Cylinder - 46; Shaft rail - 47; Powder outlet pipe - 481;

[0029] Support base - 482; Connecting plate - 483; Conveying hose - 484; Recycling and shaping mechanism - 5;

[0030] Exhaust fan-51; Air blowing pipe-52; Material receiving box-53. Detailed Implementation

[0031] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0032] like Figure 1-5 As shown, a hot melt adhesive application device includes a frame 1 and a housing 2 mounted on the frame 1, a conveyor belt 3, a powder discharging mechanism 4, a recycling and shaping mechanism 5, a heating chamber (not shown) and an oven (not shown). The conveyor belt 3 passes through the housing 2, and the housing 2 has an inlet 21 and an outlet 22 in the direction of travel of the conveyor belt 3. The conveyor belt 3 can also transport the already glued marking carrier to the heating chamber and the drying chamber to melt and re-solidify the hot melt adhesive particles, thereby completing the adhesive application. The powder discharging mechanism 4 is located at the inlet 21 and includes a hopper 45. The powder outlet 451 of the hopper 45 is aligned with the conveyor belt 3. The recycling and shaping mechanism 5 includes a blower 51 and an air blowing pipe 52. The blower 51 is located between the inlet 21 and the outlet 22 and exerts an upward suction force on the hot melt adhesive particles. The air blowing pipe 52 is located at the outlet 22 and exerts a downward blowing force on the hot melt adhesive particles.

[0033] The powder discharging mechanism 4 includes a motor 41, a driving gear 42, a driven gear 43, and two opposing rotating rollers 44. The motor 41 drives the driving gear 42 to rotate, and the driving gear 42 meshes with the driven gear 43. The two rollers 44 are respectively connected to the driving gear 42 and the driven gear 43, and each roller 44 is also provided with a plurality of material distribution plates 441 on its surface. The plurality of material distribution plates are arranged at equal intervals along the circumference of the roller 44 and extend along the length of the roller 44. The hopper 45 is located above the two rollers 44, and a powder outlet 451 is opened in the center of the hopper 45 along the length of the roller 44. The plurality of material distribution plates 441 on the two rollers 44 are arranged axially symmetrically with the center line of the powder outlet 451 as the axis of symmetry, that is, the material distribution plates 441 on the two rollers are arranged one-to-one.

[0034] When the powder dispensing mechanism 4 is activated, the hot melt adhesive particles accumulated in the hopper 45 fall vertically from the powder outlet 451. The motor 41 drives the drive gear 42 to rotate, which in turn drives the driven gear 43 to rotate. The two rollers 44 rotate synchronously with their respective gears. When the distribution plates 441 on the two rollers 44 rotate to the horizontal position simultaneously, that is, when the two distribution plates 441 abut against each other, the two distribution plates 441 block the bottom of the powder outlet 451, and the hot melt adhesive particles accumulate on the distribution plates 441. At this time, the powder dispensing mechanism 4 stops dispensing powder. Then, the two rollers 44 continue to rotate, causing the two distribution plates 441 to separate relative to each other, and the accumulated hot melt adhesive particles fall off the distribution plates 441. At this time, the powder dispensing mechanism 4 starts dispensing powder. Afterward, as the rollers 44 rotate, the two distribution plates 441 at the next station continue to switch between abutting and separating states, thus starting the previous round of powder dispensing. With the aforementioned structure, the powder dispensing mechanism 4 achieves automated powder dispensing, and the interval time and amount of powder dispensed each time can be precisely controlled by adjusting the rotation speed of the roller 44 as needed, greatly improving the accuracy of powder dispensing.

[0035] The powder dispensing mechanism 4 also includes a cylinder 46, a shaft rail 47, and several powder dispensing pipes 481. The shaft rail 47 is fixed to the outer casing 2 and extends along the length of the circular roller 44. The powder dispensing mechanism 4 also has a support base 482 and a connecting plate 483. The connecting plate 483 has a shaft hole for the shaft rail 47 to pass through. The piston rod of the cylinder 46 is connected to the connecting plate 483. The support base 482 is connected below the connecting plate 483 and has several powder dispensing pipes 481 arranged at equal intervals along the travel direction of the conveyor belt 3. The cylinder 46 drives the connecting plate 483 to move along the shaft rail 47, which in turn drives the powder dispensing pipes 481 to reciprocate along the length of the circular roller 44. The support base 482 is connected to the receiving box 53 through a conveying hose 484. The receiving box 53 conveys the hot melt adhesive particles to the support base 482 through a feeding fan, and then sprays them out through the powder dispensing pipes 481. With the aforementioned structure, the powder outlet pipe 481 can evenly distribute powder into the hopper 45 along the length of the roller 44, ensuring the uniformity and accuracy of the powder distribution, and preventing it from concentrating in the middle of the hopper.

[0036] The recycling and shaping mechanism 5 includes an exhaust fan 51 and an air blowing pipe 52. The exhaust fan 51 is fixed on the outer casing 2 and located between the inlet 21 and the outlet 22. The exhaust fan 51 exerts an upward suction force on the hot melt adhesive particles to absorb the hot melt adhesive particles that have fallen onto the conveyor belt 3 and have not adhered to the marking carrier.

[0037] The outlet of the exhaust fan 51 is also connected to a receiving box 53. The exhaust fan 51 absorbs and transports the unbonded hot melt adhesive particles to the receiving box 53 for collection and reuse, which greatly saves raw materials and improves the utilization rate of materials.

[0038] Preferably, the suction force of the exhaust fan 51 is greater than the weight of the hot melt adhesive particles but less than the weight of the labeling carrier and the adhesive force between the labeling carrier and the hot melt adhesive particles. This ensures that only the hot melt adhesive particles from the conveyor belt are sucked up, and not the hot melt adhesive particles on the labeling carrier, nor the labeling carrier itself is sucked up.

[0039] The air blowing pipe 52 is fixed on the frame 1, and several air blowing holes are arranged on the air blowing pipe 52 in a direction perpendicular to the traveling direction of the conveyor belt 3. The air blowing holes blow air directly onto the conveyor belt 3, that is, apply a downward blowing force to the hot melt adhesive particles bonded to the label carrier, so that the hot melt adhesive particles are more firmly bonded to the label carrier, and the adhesive quality of the label carrier is improved.

[0040] With the above structure, the present invention also provides a hot melt adhesive application process, comprising the following steps:

[0041] ① Place the label carrier to be glued on conveyor belt 3;

[0042] ② Spray hot melt adhesive granules onto the label carrier to be glued;

[0043] ③ Start the exhaust fan 51 to extract the hot melt adhesive particles scattered outside the label carrier;

[0044] ④ Start the air blowing pipe 53 and blow air into the label carrier to make the hot melt adhesive particles on the surface of the label carrier adhere tightly to the label carrier;

[0045] ⑤ Heat the hot melt adhesive particles to melt them;

[0046] ⑥ Dry the labeling carrier.

[0047] With the above structure, compared with the prior art, the present invention sprinkles hot melt adhesive particles on the surface of the label carrier, and then heats and melts the hot melt adhesive particles and dries them. In this way, the adhesive application step of the label carrier can be completed, replacing the screen printing method. Compared with the prior art, it effectively avoids the emission of irritating odors, greatly improves the working environment of workers, and is beneficial to workers' health.

[0048] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A hot melt adhesive application process, characterized in that, Includes the following steps: ① Place the label carrier to be glued on the conveyor belt; ② Spray hot melt adhesive granules onto the label carrier to be glued; ③ Start the exhaust fan to remove the hot melt adhesive particles scattered outside the label carrier; ④ Activate the air blowing pipe and blow air onto the label carrier to make the hot melt adhesive particles on the surface of the label carrier adhere tightly to the label carrier; ⑤ Heat the hot melt adhesive particles to melt them; ⑥ Drying the labeling carrier; The equipment includes a frame and a housing mounted on the frame, a conveyor belt, a powder discharging mechanism, a recycling and shaping mechanism, a heating chamber, and an oven. The conveyor belt passes through the housing, and the housing has an inlet and an outlet in the direction of the conveyor belt's travel. The powder discharging mechanism is located at the inlet and includes a hopper with its outlet aligned with the conveyor belt. The recycling and shaping mechanism includes a blower and an air blowing pipe. The blower is located between the inlet and the outlet and exerts an upward suction force on the hot melt adhesive particles, while the air blowing pipe is located at the outlet and exerts a downward blowing force on the hot melt adhesive particles.

2. The hot melt adhesive application process as described in claim 1, characterized in that, The powder discharging mechanism also includes a motor, a drive gear, a driven gear, and two opposing rotating rollers. The motor drives the drive gear to rotate, and the drive gear meshes with the driven gear. The two rollers are respectively connected to the drive gear and the driven gear. Each roller has several material distribution plates on its surface. The material distribution plates are arranged circumferentially along the roller and extend along the length of the roller. The powder outlet of the hopper is located directly above the two rollers. The material distribution plates on the two rollers are arranged axially symmetrically with the center line of the powder outlet as the axis of symmetry.

3. The hot melt adhesive application process as described in claim 2, characterized in that, The powder discharge mechanism also includes a cylinder, a shaft rail, and several powder discharge pipes. The shaft rail is fixed on the outer shell, and the cylinder drives several powder discharge pipes to move repeatedly on the shaft rail. The several powder discharge pipes are located in the hopper and arranged along the direction of the conveyor belt.

4. The hot melt adhesive application process as described in claim 3, characterized in that, The powder dispensing mechanism also includes a support base and a connecting plate. Several powder dispensing pipes are arranged on the support base. The two ends of the connecting plate are connected to the support base and the piston rod of the cylinder, respectively. The connecting plate is provided with shaft holes for the shaft rail to pass through.

5. The hot melt adhesive application process as described in claim 4, characterized in that, The exhaust fan is fixed to the outer casing, and the suction force is greater than the weight of the hot melt adhesive particles and less than the weight of the label carrier and the adhesive force of the label carrier to the hot melt adhesive particles.

6. The hot melt adhesive application process as described in claim 5, characterized in that, The outlet of the exhaust fan is also connected to a collection box for recycling hot melt adhesive particles.

7. The hot melt adhesive application process as described in claim 6, characterized in that, The air blowing pipe is fixed on the frame and the air blowing port is positioned directly opposite the conveyor belt.

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