A glue spraying device for paper diaper production

Abstract

The utility model discloses a kind of for paper diaper production glue spraying device, comprising: support and conveyer belt;For the glue spraying mechanism of paper diaper is sprayed, set in the support, the glue spraying mechanism includes support plate, support plate bottom is provided with the glue spraying pipe of multiple groups of spray head, pump body extracts glue in glue bucket to glue spraying pipe and is conveyed and is sprayed to the paper diaper core body on the conveyer belt below by spray head;For keeping the heating mechanism of glue fluidity, set in the glue bucket outside, the heating mechanism includes jacket, insulating rod and electric heating wire, jacket cladding glue bucket outer wall, insulating rod is set in jacket equidistantly around multiple groups, electric heating wire is wound and set on insulating rod, electric heating wire work can heat glue bucket and heat preservation avoid glue solidification. Avoid the solidification of glue in the process of standing due to temperature reduction, to ensure the fluidity of glue.

Description

Technical Field

[0001] This utility model relates to the technical field of diaper processing, specifically to a glue spraying device for diaper production. Background Technology

[0002] Disposable diapers are disposable hygiene products specifically designed for infants and incontinent individuals. They offer excellent absorbency and leak-proof properties, providing a convenient alternative to traditional cloth diapers for urine and feces collection. In diaper manufacturing, the purpose of adhesive spraying is to evenly apply hot melt adhesive or water-based adhesive to specific locations on each layer of material (such as the connection between the surface layer and the core, and the edges of the bottom layer) to firmly bond the different materials together. This ensures the stability of the diaper's layer structure during use, preventing delamination and improving the product's overall integrity and user comfort.

[0003] A search revealed that Chinese patent application number CN201810919120.X discloses a diaper adhesive spraying device for easy fixation, comprising a base, a support column welded to the right side of the upper surface of the base, limiting blocks connected to both ends of the spring, a connecting block provided on the outer side of the upper end of the support column, a motor mounted on the upper surface of the connecting plate, a drive wheel mounted on the output end of the motor, a driven shaft provided at the lower end of the drive wheel, a control rod welded to the lower surface of the driven shaft, a control tube mounted at the lower end of the control rod, a fixing rod provided at the lower end of the control tube, follower rods symmetrically provided at the lower end of the fixing rod, a support rod provided on the left side of the upper surface of the base, and an adhesive spray nozzle engaged at the upper end of the support rod.

[0004] The above-mentioned technical solutions and traditional diaper processing glue spraying equipment still have defects, such as the lack of measures to prevent glue from solidifying. The temperature of the glue may drop during the standing and transportation process, reducing its fluidity and causing it to solidify. Glue solidification will lead to uneven glue spraying, smaller nozzle orifice diameter or even blockage, resulting in quality defects such as insufficient adhesive strength of diaper materials (such as core detachment) or excessive glue (resulting in glue overflow and adhesion). Utility Model Content

[0005] The purpose of this invention is to provide a glue spraying device for diaper production, which prevents the glue from solidifying due to temperature drop during the standing process, thereby ensuring the fluidity of the glue and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A glue spraying device for diaper production, comprising:

[0008] A support frame and a conveyor belt, the conveyor belt being mounted on the support frame for conveying diaper cores;

[0009] A glue spraying mechanism for applying glue to diapers is mounted on the support. The glue spraying mechanism includes a support plate, a U-shaped plate on the top of the support plate, a glue bucket for storing glue fixed on the U-shaped plate, a pump body fixed inside the U-shaped plate by a fixing frame, and a glue spraying pipe with multiple nozzles at the bottom of the support plate. The pump body draws glue from the glue bucket and delivers it to the glue spraying pipe, and the nozzles spray glue onto the diaper core on the conveyor belt below.

[0010] A heating mechanism for maintaining the fluidity of the adhesive is disposed outside the adhesive bucket. The heating mechanism includes a jacket, an insulating rod, and an electric heating wire. The jacket covers the outer wall of the adhesive bucket. Multiple sets of insulating rods are arranged equidistantly around the jacket. The electric heating wire is wound around the insulating rod. When the electric heating wire is working, it can heat and keep the adhesive bucket warm to prevent the adhesive from solidifying.

[0011] Preferably, the pump body has an inlet pipe at the inlet end, which is connected to the bottom of the glue tank, and an outlet pipe at the outlet end, which is connected to the glue spraying pipe. The inlet pipe, outlet pipe, and glue spraying pipe all include an inner layer and an outer layer. The cavity between the inner and outer layers is filled with a polyurethane foam insulation layer to prevent the glue from cooling and condensing during the delivery process.

[0012] Preferably, it also includes a stirring mechanism for preventing the glue from solidifying by standing, which is disposed on the top of the glue bucket. The stirring mechanism includes a top cover and a shaft. The top cover is installed on the top of the glue bucket, and the shaft is rotatably installed inside the top of the top cover.

[0013] Preferably, a motor is installed on the top of the top cover, the motor drives the shaft to rotate, and stirring rods are distributed around the outer wall of the shaft from top to bottom.

[0014] Preferably, the diameter of the stirring rod on the shaft gradually decreases from top to bottom, which reduces weight while increasing rigidity and improving torque transmission efficiency.

[0015] Preferably, the stirring rod is a hollow 316 stainless steel structure, and the outer wall of the stirring rod is coated with polytetrafluoroethylene, which can reduce surface energy and make the adhesive easy to remove and clean.

[0016] Preferably, a control panel is mounted on the support plate. The control panel has a built-in PLC controller, and a temperature sensor is installed inside the glue bucket. The PLC controller and the temperature sensor work together to monitor and control the heating mechanism.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. By setting a jacket on the outside of the glue bucket and circling an insulating rod with an electric heating wire inside the jacket, the glue bucket can be heated and kept warm, preventing the glue from solidifying due to temperature drop during standing, thus ensuring the fluidity of the glue.

[0019] 2. The inlet pipe, outlet pipe, and spray pipe all adopt a double-layer structure, and the cavity between the inner and outer layers is filled with a polyurethane foam insulation layer, which effectively prevents the glue from cooling and condensing during transportation, and further ensures the fluidity of the glue. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the glue bucket of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the adhesive spray tube of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the top cover of this utility model.

[0024] In the diagram: 1. Bracket; 2. Conveyor belt; 3. Support plate; 4. U-shaped plate; 5. Glue bucket; 6. Pump body; 7. Glue spraying hose; 8. Nozzle; 9. Jacket; 10. Insulating rod; 11. Electric heating wire; 12. Outer layer; 13. Insulation layer; 14. Top cover; 15. Shaft; 16. Motor; 17. Stirring rod; 18. Coating. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution:

[0027] A glue spraying device for diaper production, comprising:

[0028] A support frame 1 and a conveyor belt 2, the conveyor belt 2 being mounted on the support frame 1 for conveying the diaper core;

[0029] A glue spraying mechanism for applying glue to diapers is mounted on a support 1. The glue spraying mechanism includes a support plate 3, a U-shaped plate 4 on the top of the support plate 3, a glue bucket 5 for storing glue fixed on the U-shaped plate 4, a pump body 6 fixed inside the U-shaped plate 4 by a fixing frame, and a glue spraying pipe 7 with multiple nozzles 8 at the bottom of the support plate 3. The pump body 6 draws glue from the glue bucket 5 and delivers it to the glue spraying pipe 7, and then sprays glue onto the diaper core on the conveyor belt 2 below through the nozzles 8.

[0030] When the pump body 6 is working, the inlet pipe at its inlet end draws glue from the bottom of the glue tank 5. After being pressurized by the pump body 6, the glue is delivered to the spray pipe 7 at the bottom of the support plate 3 through the outlet pipe. Then, the glue is evenly sprayed onto the diaper core on the conveyor belt 2 by multiple sets of nozzles 8 on the spray pipe 7. This realizes the functions of glue extraction, transportation and spraying, ensuring that the glue can be accurately and evenly sprayed onto the diaper core, meeting the bonding requirements in diaper production.

[0031] A heating mechanism for maintaining the fluidity of the adhesive is located outside the adhesive bucket 5. The heating mechanism includes a jacket 9, an insulating rod 10, and an electric heating wire 11. The jacket 9 covers the outer wall of the adhesive bucket 5. Multiple sets of insulating rods 10 are arranged equidistantly inside the jacket 9. The electric heating wire 11 is wound around the insulating rod 10. When the electric heating wire 11 is working, it can heat and keep the adhesive bucket 5 warm to prevent the adhesive from solidifying.

[0032] When the electric heating wire 11 is powered on, it generates heat, which passes through the glue container 5 to heat and keep the glue inside the container warm. This prevents the glue from solidifying due to temperature drop during standing, maintains the fluidity of the glue, and ensures that the glue can be smoothly drawn and sprayed during the spraying process. This avoids problems such as uneven glue application, reduced nozzle diameter, or even blockage caused by glue solidification.

[0033] In this embodiment, the specific settings can be as follows:

[0034] Pump body 6 (using a gear pump, flow rate 5-15L / min) draws glue from the bottom of glue tank 5 through the inlet pipe, pressurizes and delivers it through the outlet pipe to spray pipe 7 (inner diameter 8mm), and finally sprays it out in atomized or striped form from nozzle 8 (orifice diameter 0.3-0.8mm). U-shaped plate 4 (using a 5mm thick steel plate) is fixed to support plate 3 with bolts to form a "door" shaped structure. Glue tank 5 (capacity 50L) is nested on top of U-shaped plate 4, and pump body 6 is suspended inside U-shaped plate 4 by a fixing frame (welded angle steel). This realizes the entire process of glue transportation from storage to spraying. Spray pipe 7 has 6-8 nozzles 8 arranged horizontally, covering 90% of the width of conveyor belt 2. The spraying width adjustment range is 200-500mm to meet the needs of different sizes of diapers.

[0035] The jacket 9 (made of 304 stainless steel, 1.5mm thick) forms a sealed cavity with a 5mm gap between it and the outer wall of the glue bucket 5. Six insulating rods 10 (ceramic material, 10mm in diameter) are welded equidistantly to the inner wall of the jacket 9. Nickel-chromium alloy electric heating wires 11 (3kW power, 1.2mm in diameter) are spirally wound on the insulating rods 10 (15mm spacing). When the heating wire is energized, it heats the bucket wall through radiation and convection, keeping the glue in a molten state (e.g., hot melt glue is kept at 170-190℃). Ventilation holes are provided at the top and bottom of the jacket 9 to form a heat circulation.

[0036] For a preferred implementation, please refer to Figure 1-3 The pump body 6 has an inlet pipe at its inlet end, which is connected to the bottom of the glue tank 5. The pump body 6 has an outlet pipe at its outlet end, which is connected to the glue spraying pipe 7. The inlet pipe, outlet pipe and glue spraying pipe 7 all include an inner layer and an outer layer 12. The cavity between the inner layer and the outer layer 12 is filled with a polyurethane foam insulation layer 13 to prevent the glue from cooling and condensing during the delivery process.

[0037] The inlet pipe, outlet pipe, and spray nozzle 7 all adopt a double-layer structure, with a polyurethane foam insulation layer 13 filling the cavity between the inner and outer layers 12. Polyurethane foam has excellent thermal insulation properties, effectively preventing heat transfer and reducing heat loss of the adhesive during transport; it also prevents the adhesive from cooling and solidifying due to temperature drops during transport, ensuring good fluidity and guaranteeing the uniformity and stability of the spray.

[0038] For a preferred implementation, please refer to Figure 1 , 2 4. It also includes a stirring mechanism to prevent the glue from solidifying, located on top of the glue container 5. The stirring mechanism includes a top cover 14 and a shaft 15. The top cover 14 is installed on top of the glue container 5, and the shaft 15 is rotatably installed inside the top of the top cover 14. A motor 16 is installed on the top of the top cover 14, driving the shaft 15 to rotate. Stirring rods 17 are distributed around the outer wall of the shaft 15 from top to bottom. The diameter of the stirring rods 17 on the shaft 15 gradually decreases from top to bottom, reducing weight while increasing rigidity and improving torque transmission efficiency. The stirring rods 17 are hollow 316 stainless steel structures, and the outer wall of the stirring rods 17 is coated with polytetrafluoroethylene 18, which reduces surface energy, making the glue easier to remove and clean.

[0039] In use, the motor 16 at the top of the top cover 14 drives the shaft 15 to rotate, and the stirring rods 17 distributed around the outer wall of the shaft 15 from top to bottom rotate accordingly, stirring the glue in the glue container 5. The diameter of the stirring rods 17 gradually decreases from top to bottom, reducing weight while increasing rigidity and improving torque transmission efficiency. The stirring rods 17 are hollow 316 stainless steel structures with a polytetrafluoroethylene coating 18 on the outer wall, which reduces surface energy and makes the glue easy to detach. This further prevents the glue from settling and solidifying during standing, maintaining the uniformity and fluidity of the glue, while also facilitating the cleaning of the stirring rods 17 and reducing glue residue.

[0040] In this embodiment, the specific settings can be as follows:

[0041] The upper stirring rod 17 has a diameter of 30mm, the middle layer is 25mm, and the lower layer is 20mm, forming a gradient structure that generates a composite axial and radial flow field during stirring. The stirring rod 17 has a hollow design (wall thickness of 2mm) and is coated with a PTFE coating 18 (thickness of 50μm) on the outer wall. The surface tension is ≤18mN / m, the contact angle of the adhesive is ≥110°, and it is easy to peel off.

[0042] For a preferred implementation, please refer to Figure 1-2 A control panel is installed on the support plate 3. The control panel has a built-in PLC controller. A temperature sensor is installed inside the glue bucket 5. The PLC controller and the temperature sensor work together to monitor and control the heating mechanism.

[0043] During use, the temperature sensor monitors the temperature inside the glue bucket 5 in real time and transmits the temperature signal to the PLC controller. The PLC controller controls the electric heating wire 11 of the heating mechanism to work according to the preset temperature value, so as to achieve precise control of the temperature inside the glue bucket 5.

[0044] In this embodiment, it can be specifically set as follows:

[0045] A temperature sensor (PT100, accuracy ±0.5℃) is inserted into the middle of glue bucket 5 to collect temperature signals in real time and transmit them to the PLC (Siemens S7-1200). The PLC adjusts the heating wire power through a PID algorithm: when the temperature is less than the set value -5℃, the heating wire operates at full power (100%); when the temperature is within ±2℃ of the set value, the heating wire power is adjusted to 30-50% and maintained. The control panel (7-inch touch screen) displays the real-time temperature, the set target temperature (adjustable from 160-220℃), and fault alarms.

[0046] In the production process of diapers, raw materials, such as the absorbent core and bottom film, are first unrolled and then continuously moved forward by conveyor belt 2. During this movement, adhesive is sprayed onto the corresponding parts of the raw materials, such as the top of the core, to achieve bonding between the layers. After adhesive spraying, a series of processing steps, such as cutting, folding, and pressing, are performed to finally form a single diaper. In this embodiment, the system's collaborative workflow is as follows:

[0047] 1. Preheating stage:

[0048] After powering on, the PLC starts the heating wire, and at the same time the stirring motor 16 runs at low speed (100r / min). Within 30 minutes, the glue is heated to the set temperature. After the sensor reports that the temperature has reached the target, it enters standby mode.

[0049] 2. Glue spraying stage:

[0050] When the conveyor belt 2 starts, the pump body 6 draws glue through the insulated pipe to the nozzle 8. The PLC adjusts the glue spraying frequency according to the speed of the conveyor belt 2 (e.g., 4Hz when the glue spraying frequency is 200 pieces / minute). The stirring motor 16 maintains a speed of 200r / min.

[0051] 3. Shutdown phase:

[0052] After the conveyor belt 2 stops, the pump body 6 shuts off after a 30-second delay, the heating wire switches to the heat preservation mode (power 20%), and the stirring motor 16 continues to run for 10 minutes to prevent the glue from settling and solidifying.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A glue spraying device for diaper production, characterized in that, include: A support (1) and a conveyor belt (2), the conveyor belt (2) being mounted on the support (1) for conveying diaper cores; A glue spraying mechanism for spraying glue onto diapers is provided on the bracket (1). The glue spraying mechanism includes a support plate (3), a U-shaped plate (4) is provided on the top of the support plate (3), a glue bucket (5) for storing glue is fixed on the U-shaped plate (4), a pump body (6) is fixed inside the U-shaped plate (4) by a fixing frame, and a glue spraying pipe (7) with multiple sets of nozzles (8) is provided at the bottom of the support plate (3). The pump body (6) draws glue from the glue bucket (5) and delivers it to the glue spraying pipe (7) and sprays glue onto the diaper core on the conveyor belt (2) below through the nozzles (8). A heating mechanism for maintaining the fluidity of the glue is located outside the glue bucket (5). The heating mechanism includes a jacket (9), an insulating rod (10), and an electric heating wire (11). The jacket (9) covers the outer wall of the glue bucket (5). Multiple sets of insulating rods (10) are arranged equidistantly around the jacket (9). The electric heating wire (11) is wound around the insulating rod (10). The electric heating wire (11) can heat and keep the glue bucket (5) warm to prevent the glue from solidifying.

2. The adhesive spraying device for diaper production according to claim 1, characterized in that: The pump body (6) is provided with an inlet pipe at the inlet end, which is connected to the bottom of the glue tank (5). The pump body (6) is provided with an outlet pipe at the outlet end, which is connected to the glue spraying pipe (7). The inlet pipe, outlet pipe and glue spraying pipe (7) all include an inner layer and an outer layer (12). The cavity between the inner layer and the outer layer (12) is filled with a polyurethane foam insulation layer (13) to prevent the glue from cooling and condensing during the delivery process.

3. The adhesive spraying device for diaper production according to claim 1, characterized in that: It also includes a stirring mechanism for preventing the glue from solidifying by standing, which is located on the top of the glue bucket (5). The stirring mechanism includes a top cover (14) and a shaft (15). The top cover (14) is installed on the top of the glue bucket (5), and the shaft (15) is rotatably installed inside the top of the top cover (14).

4. The adhesive spraying device for diaper production according to claim 3, characterized in that: A motor (16) is installed on the top of the top cover (14). The motor (16) drives the shaft (15) to rotate. Stirring rods (17) are distributed around the outer wall of the shaft (15) from top to bottom.

5. A glue spraying device for diaper production according to claim 4, characterized in that: The diameter of the stirring rod (17) on the shaft (15) gradually decreases from top to bottom, which reduces weight while increasing rigidity and improving torque transmission efficiency.

6. The adhesive spraying device for diaper production according to claim 4, characterized in that: The stirring rod (17) is a hollow 316 stainless steel structure. The outer wall of the stirring rod (17) is coated with polytetrafluoroethylene (18), which can reduce the surface energy and make the adhesive easy to remove and clean.

7. The adhesive spraying device for diaper production according to claim 1, characterized in that: The control panel is installed on the support plate (3). The control panel has a built-in PLC controller. A temperature sensor is installed in the glue bucket (5). The PLC controller and the temperature sensor work together to monitor and control the heating mechanism.

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