Extrusion equipment for producing hot-melt pressure-sensitive adhesive

Abstract

The invention relates to the technical field of hot-melt pressure-sensitive adhesive production, in particular to extrusion equipment for hot-melt pressure-sensitive adhesive production, which comprises a mounting seat, an extrusion cylinder is arranged on the mounting seat, a feeding pipe is arranged at the top of one end of the extrusion cylinder, and a discharging head is arranged at one end, far away from the feeding pipe, of the extrusion cylinder. A material pushing assembly used for extruding the hot-melt pressure-sensitive adhesive from the discharging head is arranged in the extrusion barrel, a heating assembly used for heating the interior of the extrusion barrel is arranged on the extrusion barrel, and a forming die barrel is fixedly communicated with the discharging head; and a pre-cooling mechanism used for performing pre-cooling treatment on the hot-melt pressure-sensitive adhesive is arranged on the forming die cylinder. According to the hot-melt pressure-sensitive adhesive, the fluidity of the hot-melt pressure-sensitive adhesive during extrusion can be reduced, so that the curing forming effect of the hot-melt pressure-sensitive adhesive after extrusion can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hot melt pressure sensitive adhesive production, in particular to an extrusion device for hot melt pressure sensitive adhesive production. Background Art

[0002] Hot melt pressure sensitive adhesive is a new type of hot melt adhesive that does not contain solvents and water, is pollution-free and non-carcinogenic, has a simple production process, and is an important branch of adhesives. When solid hot melt pressure sensitive adhesive is heated to 150-200°C, it becomes a fluid and produces extremely high thermal viscosity. It can be used by spraying and roller coating. When cooled to room temperature, it becomes solid again and can produce good adhesion with fingers or slight pressure. It is usually coated on paper, plastic film, fabric or metal foil to make pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet, which is mainly used for sealing packaging or bundling of various cartons, pasting of trademarks and labels, and temporary fixation of solid parts.

[0003] During the production and preparation of hot melt pressure-sensitive adhesive, it is usually necessary to feed the raw materials into the inside of the tank, heat and stir the raw materials inside the tank so that the raw materials inside the tank are melted and mixed, and then extrude them through extrusion equipment. Thereafter, the extruded hot melt pressure-sensitive adhesive is cooled and solidified. During the solidification process, the hot melt pressure-sensitive adhesive is cut into a specific shape.

[0004] In the process of extruding the hot melt pressure sensitive adhesive, in order to prevent the temperature of the hot melt pressure sensitive adhesive from dropping and sticking to the inner wall of the extrusion equipment, the existing extrusion equipment usually sets a heating structure on the periphery of the extrusion equipment to heat the extrusion equipment and prevent the hot melt pressure sensitive adhesive inside the extrusion equipment from curing and sticking. However, this method will cause the temperature of the hot melt pressure sensitive adhesive to be too high when it is just extruded, which will increase the fluidity of the hot melt pressure sensitive adhesive, and then easily affect the curing and molding effect of the hot melt pressure sensitive adhesive after being extruded. Summary of the invention

[0005] In order to reduce the fluidity of the hot melt pressure-sensitive adhesive when it is extruded, thereby ensuring the curing and molding effect of the hot melt pressure-sensitive adhesive after being extruded, the present application provides an extrusion device for the production of hot melt pressure-sensitive adhesive.

[0006] The present application provides an extrusion device for producing hot melt pressure sensitive adhesive, which adopts the following technical solution: An extrusion device for producing hot melt pressure-sensitive adhesive comprises a mounting seat, an extrusion cylinder is arranged on the mounting seat, a feed pipe is arranged on the top of one end of the extrusion cylinder, a discharge head is arranged at the end of the extrusion cylinder away from the feed pipe, a pushing assembly for extruding the hot melt pressure-sensitive adhesive from the discharge head is arranged in the extrusion cylinder, a heating assembly for heating the inside of the extrusion cylinder is arranged on the extrusion cylinder, a molding die is fixedly connected to the discharge head, and a precooling mechanism for precooling the hot melt pressure-sensitive adhesive is arranged on the molding die.

[0007] By adopting the above technical solution, the pre-cooling mechanism is used to pre-cool the hot melt pressure-sensitive adhesive entering the forming die, thereby helping to reduce the fluidity of the hot melt pressure-sensitive adhesive when being extruded, and further helping to ensure the curing and molding effect of the hot melt pressure-sensitive adhesive after being extruded. The pusher assembly is used to push and extrude the hot melt pressure-sensitive adhesive in the extrusion cylinder into the forming die, and the heating assembly is used to heat and keep the hot melt pressure-sensitive adhesive in the extrusion cylinder, thereby helping to improve the fluidity of the hot melt pressure-sensitive adhesive in the extrusion cylinder, and further helping to improve the pushing and extrusion effect of the pusher assembly on the hot melt pressure-sensitive adhesive in the extrusion cylinder.

[0008] In a specific implementation scheme, the pre-cooling mechanism includes a liquid cooling component and an air cooling component. The liquid cooling component is used to liquid cool the hot melt pressure-sensitive adhesive inside the molding die cylinder, and the air cooling component is used to air cool the hot melt pressure-sensitive adhesive extruded from the molding die cylinder.

[0009] By adopting the above technical scheme, the use of a liquid cooling component helps to liquid-cool the hot-melt pressure-sensitive adhesive inside the molding die barrel, the use of an air cooling component helps to air-cool the hot-melt pressure-sensitive adhesive extruded from the molding die barrel, and the use of a liquid cooling component in conjunction with an air cooling component helps to pre-cool the hot-melt pressure-sensitive adhesive, thereby helping to reduce the fluidity of the hot-melt pressure-sensitive adhesive when it is extruded, and further helping to ensure the curing molding effect of the hot-melt pressure-sensitive adhesive after extrusion.

[0010] In a specific possible implementation scheme, the liquid cooling assembly includes a liquid cooling cylinder, a liquid inlet pipe, a liquid outlet pipe and a guide plate. The liquid cooling cylinder is sleeved on the periphery of the forming mold cylinder, the guide plate is arranged on the inner wall of the liquid cooling cylinder and is arranged in a spiral shape, and the guide plate is used to divide the interior of the liquid cooling cylinder into a spiral guide channel. The liquid inlet pipe is arranged at the bottom of the liquid cooling cylinder, and the liquid outlet pipe is arranged at the top of the liquid cooling cylinder, and the liquid inlet pipe and the liquid outlet pipe are both connected to the guide channel.

[0011] By adopting the above technical solution, the use of the liquid inlet pipe and the liquid outlet pipe helps to allow the cooling water to pass through the liquid cooling cylinder, thereby helping to reduce the side wall temperature of the molding barrel, and then helping to preliminarily cool the hot melt pressure sensitive adhesive inside the molding barrel, helping to reduce the fluidity of the hot melt pressure sensitive adhesive when being extruded, and ensuring the curing molding effect of the hot melt pressure sensitive adhesive after being extruded. The use of the guide plate helps to extend the flow path of the cooling water inside the liquid cooling cylinder, thereby helping to improve the cooling effect on the side wall of the molding barrel, and then helping to improve the preliminarily cooling effect of the hot melt pressure sensitive adhesive inside the molding barrel.

[0012] In a specific possible implementation scheme, the air cooling assembly includes an air cooling cylinder, an air inlet pipe and an air outlet component. The air cooling cylinder is sleeved on the circumferential periphery of the liquid cooling cylinder, the air inlet pipe is arranged on the top of the air cooling cylinder, and the air outlet component is arranged at the bottom of the air inlet pipe and is arranged in a ring shape.

[0013] By adopting the above technical scheme, the air inlet pipe is used to help send cooling air into the air-cooled cylinder, and the air outlet component is used to help blow cooling air toward the hot-melt pressure-sensitive adhesive being extruded into the molding die, thereby facilitating secondary cooling of the hot-melt pressure-sensitive adhesive, further reducing the fluidity of the hot-melt pressure-sensitive adhesive when being extruded, and further ensuring the curing molding effect of the hot-melt pressure-sensitive adhesive after being extruded.

[0014] In a specific feasible implementation scheme, a swirl plate is provided in the air-cooling cylinder at one end close to the air inlet pipe, and a flow equalizing plate is provided in the air-cooling cylinder below the swirl plate. The flow equalizing plate is provided with a plurality of groups of flow equalizing holes, and each group of the flow equalizing holes is arranged in a circular array with the axis of the air-cooling cylinder as the center line, and an air diffuser is provided at one end of the flow equalizing holes close to the air outlet component.

[0015] By adopting the above technical solution, the use of swirl plates helps to make the cooling air rotate and flow inside the air-cooled cylinder, and the flow equalizing holes and air expansion ports set on the flow equalizing plate help to improve the uniformity of the cooling air flowing in the air-cooled cylinder, thereby helping to improve the consistency of the cooling air volume blown out from different positions of the air outlet component.

[0016] In a specific feasible implementation scheme, the air outlet component includes a first ring plate and a second ring plate, and the first ring plate and the second ring plate are arranged on the bottom inner wall of the air-cooled cylinder in sequence from top to bottom, and an air outlet channel is formed between the first ring plate and the second ring plate. The first ring plate is provided with ventilation holes, and the ventilation holes are used to connect the internal cavity of the air-cooled cylinder and the air outlet channel.

[0017] By adopting the above technical solution, the air outlet channel is used to help adjust the angle at which the cooling air is blown toward the hot melt pressure-sensitive adhesive, thereby helping to improve the cooling effect of the cooling air on the hot melt pressure-sensitive adhesive.

[0018] In a specific feasible implementation scheme, a replacement cylinder is detachably provided on the inner wall of the molding mold barrel, an anti-idiot block is provided on the circumferential side wall of the replacement cylinder, an anti-idiot groove for inserting the anti-idiot block is provided on the inner wall of the molding mold barrel, a screw is provided on the top of the replacement cylinder, the screw passes through the top wall of the molding mold barrel, and a locking nut is provided on the screw.

[0019] By adopting the above technical scheme, the replacement cylinder can be used to prevent the hot-melt pressure-sensitive adhesive from adhering to the inner wall of the molding mold barrel, the screw and locking nut can be used to lock the replacement cylinder and the molding mold barrel together, and the anti-foolproof block can be used to improve the accuracy of the position of the replacement cylinder installed in the molding mold barrel.

[0020] In a specific possible implementation manner, an anti-stick coating for preventing the hot-melt pressure-sensitive adhesive from adhering is provided on the inner wall of the replacement cylinder.

[0021] By adopting the above technical solution, the anti-stick coating helps to prevent the hot melt pressure-sensitive adhesive from adhering to the inner wall of the replacement cylinder, thereby helping to ensure the use effect of the replacement cylinder and extend the service life of the replacement cylinder.

[0022] In a specific possible implementation scheme, the pushing assembly includes a pushing motor, a rotating shaft and a spiral blade. The rotating shaft is coaxially rotatably arranged in the extrusion cylinder, the pushing motor is arranged on the outer wall of the extrusion cylinder and the output end of the pushing motor is connected to the rotating shaft, the spiral blade is arranged on the rotating shaft, and the spiral blade is in sliding contact with the inner wall of the extrusion cylinder.

[0023] By adopting the above technical solution, the push motor helps to drive the rotating shaft to rotate, thereby helping to drive the spiral blades to rotate. While rotating, the spiral blades help to drive the hot-melt pressure-sensitive adhesive in the extrusion barrel to move toward the discharge head, thereby helping to push the hot-melt pressure-sensitive adhesive in the extrusion barrel into the interior of the molding die barrel.

[0024] In a specific possible implementation scheme, the heating assembly includes a heating cylinder and a heating wire, the heating cylinder is sleeved on the circumferential periphery of the extrusion cylinder, the heating cylinder is filled with a heating medium, the heating wire is arranged on the circumferential inner wall of the heating cylinder, and the heating wire is arranged in a spiral shape.

[0025] By adopting the above technical scheme, the heating wire is used to help heat the heating medium in the heating cylinder, which helps to heat the extrusion cylinder through the heating medium, and then helps to heat and keep the hot melt pressure-sensitive adhesive in the extrusion cylinder, thereby improving the fluidity of the hot melt pressure-sensitive adhesive in the extrusion cylinder and improving the pushing and extrusion effect of the pushing component on the hot melt pressure-sensitive adhesive in the extrusion cylinder.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application provides a pre-cooling mechanism, which helps to pre-cool the hot-melt pressure-sensitive adhesive entering the molding die, thereby helping to reduce the fluidity of the hot-melt pressure-sensitive adhesive when it is extruded, and further helping to ensure the curing molding effect of the hot-melt pressure-sensitive adhesive after being extruded. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram showing the specific structure of the pusher component and the heating component.

[0029] Figure 3 It is a schematic diagram showing the specific structure of the liquid cooling component.

[0030] Figure 4 It is a schematic diagram showing the specific structure of the air-cooling component.

[0031] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0032] Figure 6 It is a schematic diagram reflecting the specific internal structure of the molding die.

[0033] Explanation of reference numerals: 1. mounting base; 2. extrusion cylinder; 3. feed pipe; 4. discharge head; 5. push assembly; 51. push motor; 52. rotating shaft; 53. spiral blade; 6. heating assembly; 61. heating cylinder; 62. heating wire; 7. forming mold cylinder; 8. liquid cooling assembly; 81. liquid cooling cylinder; 82. liquid inlet pipe; 83. liquid outlet pipe; 84. guide vane; 9. air cooling assembly; 91. air cooling cylinder; 92. air inlet Tube; 93, air outlet component; 931, first ring plate; 932, second ring plate; 10, guide channel; 11, swirl plate; 12, flow equalizing plate; 13, flow equalizing hole; 14, air expansion port; 15, air outlet channel; 16, ventilation hole; 17, adjustment component; 171, adjustment motor; 172, adjustment screw; 173, connecting block; 18, vertical slot; 19, replacement of cylinder; 20, anti-fool block; 21, screw; 22, locking nut. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings.

[0035] The present application discloses an extrusion device for producing hot melt pressure sensitive adhesive. Figure 1 and Figure 2, including a mounting base 1, on which an extrusion cylinder 2 is horizontally placed, a feed pipe 3 is fixedly connected to the top of one end of the extrusion cylinder 2, a discharge head 4 is integrally formed at the other end of the extrusion cylinder 2, a forming mold barrel 7 is fixedly connected to the discharge head 4, and the opening of the forming mold barrel 7 faces downward, and a pushing assembly 5 is arranged in the extrusion cylinder 2.

[0036] Reference Figure 2 The pushing assembly 5 includes a pushing motor 51, a rotating shaft 52 and a spiral blade 53. The rotating shaft 52 is rotatably installed in the extrusion cylinder 2 and is coaxially arranged with the extrusion cylinder 2. The pushing motor 51 is fixedly installed on the outer wall of the extrusion cylinder 2, and the output end of the pushing motor 51 is fixedly connected to one side end of the rotating shaft 52. The spiral blade 53 is fixedly installed on the rotating shaft 52, and the spiral blade 53 slides against the inner wall of the extrusion cylinder 2.

[0037] Reference Figure 1 and Figure 2 During the production and preparation process of the hot melt pressure-sensitive adhesive, the hot melt pressure-sensitive adhesive enters the extrusion cylinder 2 through the feed pipe 3, and the push motor 51 runs, driving the rotating shaft 52 and the spiral blade 53 to rotate synchronously, so that the spiral blade 53 pushes the hot melt pressure-sensitive adhesive in the extrusion cylinder 2 toward the discharge head 4 during the rotation, so that the hot melt pressure-sensitive adhesive in the extrusion cylinder 2 is extruded into the molding die 7 through the discharge head 4.

[0038] Reference Figure 1 and Figure 2 A heating assembly 6 is provided on the circumference of the extrusion cylinder 2. The heating assembly 6 includes a heating cylinder 61 and a heating wire 62. The heating cylinder 61 is fixedly sleeved on the circumferential outer wall of the extrusion cylinder 2. The heating cylinder 61 is filled with a heating medium. The heating wire 62 is fixedly installed on the circumferential inner wall of the heating cylinder 61, and the heating wire 62 is arranged in a spiral shape.

[0039] Reference Figure 1 and Figure 2 After the hot melt pressure-sensitive adhesive enters the extrusion cylinder 2, the heating wire 62 heats the heating medium in the heating cylinder 61, thereby heating the extrusion cylinder 2 through the heating medium, and then heating and insulating the hot melt pressure-sensitive adhesive in the extrusion cylinder 2, which helps to improve the fluidity of the hot melt pressure-sensitive adhesive in the extrusion cylinder 2, thereby helping to improve the pushing and extrusion effect of the hot melt pressure-sensitive adhesive in the extrusion cylinder 2.

[0040] Reference Figure 1 and Figure 3A precooling mechanism is provided on the molding die cylinder 7, and the precooling mechanism includes a liquid cooling assembly 8, and the liquid cooling assembly 8 includes a liquid cooling cylinder 81, a liquid inlet pipe 82, a liquid outlet pipe 83 and a guide plate 84. The liquid cooling cylinder 81 is fixedly sleeved on the circumferential periphery of the molding die cylinder 7, and the guide plate 84 is fixedly installed on the circumferential inner wall of the liquid cooling cylinder 81 and is arranged in a spiral shape. The guide plate 84 divides the interior of the liquid cooling cylinder 81 into a spiral guide channel 10, the liquid inlet pipe 82 is fixedly connected to the bottom of the liquid cooling cylinder 81, and the liquid outlet pipe 83 is fixedly connected to the top of the liquid cooling cylinder 81, and the liquid inlet pipe 82 and the liquid outlet pipe 83 are both connected to the guide channel 10.

[0041] Reference Figure 3 When the hot melt pressure-sensitive adhesive enters the molding die cylinder 7, cooling water enters the liquid cooling cylinder 81 through the liquid inlet pipe 82, and flows along the guide channel 10 under the guidance of the guide plate 84, and then is discharged through the liquid outlet pipe 83, which helps to reduce the side wall temperature of the molding die cylinder 7, thereby helping to preliminarily cool the hot melt pressure-sensitive adhesive inside the molding die cylinder 7, and further helps to reduce the fluidity of the hot melt pressure-sensitive adhesive when being extruded, thereby ensuring the curing molding effect of the hot melt pressure-sensitive adhesive after being extruded from the molding die cylinder 7.

[0042] Reference Figure 4 and Figure 5 The precooling mechanism also includes an air cooling component 9, which includes an air cooling cylinder 91, an air inlet pipe 92 and an air outlet component 93. The air cooling cylinder 91 is fixedly sleeved on the circumferential outer wall of the liquid cooling cylinder 81, and the air inlet pipe 92 is fixedly connected to the top of the air cooling cylinder 91. The air outlet component 93 is annular as a whole and is arranged at the bottom of the air inlet pipe 92. In this embodiment, the air outlet component 93 includes a first ring plate 931 and a second ring plate 932, which are arranged on the bottom inner wall of the air cooling cylinder 91 in sequence from top to bottom. An air outlet channel 15 is formed between the first ring plate 931 and the second ring plate 932, and a ventilation hole 16 is opened through the first ring plate 931.

[0043] Reference Figure 4 and Figure 5 A swirl plate 11 is fixed on the inner wall of the air-cooled cylinder 91, and a flow equalizing plate 12 is fixedly installed inside the air-cooled cylinder 91. The flow equalizing plate 12 is located below the swirl plate 11, and a plurality of groups of flow equalizing holes 13 are opened through the flow equalizing plate 12. Each group of flow equalizing holes 13 is arranged in a circular array with the axis of the air-cooled cylinder 91 as the center line, and an air expansion port 14 is integrally formed at the bottom end of each flow equalizing hole 13.

[0044] Reference Figure 4 and Figure 5When the hot melt pressure-sensitive adhesive is extruded out of the molding die 7, the cooling air enters the air-cooled cylinder 91 through the air inlet pipe 92, rotates and disperses under the guidance of the swirl blade 11, and continues to flow downward after passing through the flow-averaging hole 13 and the air expansion port 14, and then passes through the ventilation hole 16 and enters the air outlet channel 15, and is blown to the surface of the hot melt pressure-sensitive adhesive through the air outlet channel 15, which helps to perform secondary cooling of the hot melt pressure-sensitive adhesive, further reduces the fluidity of the hot melt pressure-sensitive adhesive when being extruded, and further ensures the curing molding effect of the hot melt pressure-sensitive adhesive after being extruded.

[0045] Reference Figure 4 and Figure 5 A plurality of adjustment components 17 are arranged inside the air-cooled cylinder 91, and each adjustment component 17 includes an adjustment motor 171, an adjustment screw 172 and a connecting block 173. A plurality of vertical grooves 18 are provided on the inner wall of the air-cooled cylinder 91, and the adjustment screw 172 is vertically rotatably installed inside the vertical groove 18. The adjustment motor 171 is fixedly installed on the air-cooled cylinder 91, and the top end of the adjustment screw 172 is fixedly connected to the output end of the adjustment motor 171, and the connecting block 173 is clamped and placed in the vertical groove 18, and the adjustment screw 172 threadably penetrates the connecting block 173, and the connecting block 173 is fixedly connected to the first ring plate 931.

[0046] Reference Figure 4 and Figure 5 , multiple adjustment motors 171 operate synchronously, driving multiple adjustment screws 172 to rotate synchronously, thereby driving multiple connection blocks 173 to move synchronously in the vertical direction, and then driving the first ring plate 931 to move synchronously, which helps to adjust the air volume of the air outlet channel 15, thereby helping to adjust the air cooling effect of the hot melt pressure-sensitive adhesive, and then helping to adjust the fluidity of the hot melt pressure-sensitive adhesive when it is extruded, further ensuring the curing and molding effect of the hot melt pressure-sensitive adhesive after being extruded.

[0047] Reference Figure 6 A replacement barrel 19 is detachably mounted on the inner wall of the forming barrel 7, a screw 21 is fixedly mounted on the top of the replacement barrel 19, the screw 21 penetrates the top wall of the forming barrel 7, and a locking nut 22 is threadedly connected to the screw 21. An anti-fool block 20 is fixedly connected to the outer wall of the replacement barrel 19, and an anti-fool groove is provided on the inner wall of the forming barrel 7. A layer of anti-stick coating is coated on the inner wall of the replacement barrel 19.

[0048] Reference Figure 6When installing the replacement barrel 19, the operator aligns the foolproof block 20 with the foolproof groove, inserts the replacement barrel 19 into the molding die barrel 7, and allows the screw 21 to penetrate and extend out of the top wall of the molding die barrel 7, and tightens the locking nut 22, so that the replacement barrel 19 and the molding die barrel 7 are locked and connected together. The anti-stick coating helps to prevent the hot melt pressure-sensitive adhesive from adhering to the inner wall of the replacement barrel 19, thereby helping to ensure the use effect of the replacement barrel 19 and extend the service life of the replacement barrel 19.

[0049] The implementation principle of the embodiment of the present application is: during the production and preparation process of the hot melt pressure-sensitive adhesive, the hot melt pressure-sensitive adhesive enters the extrusion barrel 2 through the feed pipe 3, and the pushing motor 51 runs, driving the rotating shaft 52 and the spiral blade 53 to rotate synchronously, so that the spiral blade 53 pushes the hot melt pressure-sensitive adhesive in the extrusion barrel 2 toward the discharge head 4 during the rotation, so that the hot melt pressure-sensitive adhesive in the extrusion barrel 2 is extruded into the molding die 7 through the discharge head 4.

[0050] After the hot melt pressure-sensitive adhesive enters the extrusion cylinder 2, the heating wire 62 heats the heating medium in the heating cylinder 61, thereby heating the extrusion cylinder 2 through the heating medium, and then heating and insulating the hot melt pressure-sensitive adhesive in the extrusion cylinder 2, which helps to improve the fluidity of the hot melt pressure-sensitive adhesive in the extrusion cylinder 2, thereby helping to improve the push extrusion effect of the hot melt pressure-sensitive adhesive in the extrusion cylinder 2.

[0051] After the hot melt pressure-sensitive adhesive enters the molding die barrel 7, cooling water enters the liquid cooling cylinder 81 through the liquid inlet pipe 82, and flows along the guide channel 10 under the guidance of the guide plate 84, and then is discharged through the liquid outlet pipe 83, which helps to reduce the side wall temperature of the molding die barrel 7, thereby helping to preliminarily cool the hot melt pressure-sensitive adhesive inside the molding die barrel 7, and further helps to reduce the fluidity of the hot melt pressure-sensitive adhesive when it is extruded, thereby ensuring the curing molding effect of the hot melt pressure-sensitive adhesive after being extruded out of the molding die barrel 7.

[0052] When the hot melt pressure-sensitive adhesive is extruded out of the molding die 7, cooling air enters the air-cooled cylinder 91 through the air inlet pipe 92, rotates and disperses under the guidance of the swirl blades 11, and continues to flow downward after passing through the flow-equalizing holes 13 and the air expansion ports 14, and then enters the air outlet channel 15 after passing through the ventilation holes 16, and is blown toward the surface of the hot melt pressure-sensitive adhesive through the air outlet channel 15, which helps to perform secondary cooling of the hot melt pressure-sensitive adhesive, further reduces the fluidity of the hot melt pressure-sensitive adhesive when being extruded, and further ensures the curing molding effect of the hot melt pressure-sensitive adhesive after being extruded.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An extrusion device for producing hot melt pressure sensitive adhesive, characterized in that: The invention comprises a mounting seat (1), wherein an extrusion cylinder (2) is arranged on the mounting seat (1), a feed pipe (3) is arranged at the top of one end of the extrusion cylinder (2), a discharge head (4) is arranged at the end of the extrusion cylinder (2) away from the feed pipe (3), a pushing assembly (5) is arranged inside the extrusion cylinder (2) for extruding the hot melt pressure-sensitive adhesive from the discharge head (4), a heating assembly (6) is arranged on the extrusion cylinder (2) for heating the inside of the extrusion cylinder (2), a molding die (7) is fixedly connected to the discharge head (4), and a precooling mechanism for precooling the hot melt pressure-sensitive adhesive is arranged on the molding die (7).

2. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 1, characterized in that: The pre-cooling mechanism comprises a liquid cooling component (8) and an air cooling component (9), wherein the liquid cooling component (8) is used to perform liquid cooling treatment on the hot melt pressure sensitive adhesive inside the molding die cylinder (7), and the air cooling component (9) is used to perform air cooling treatment on the hot melt pressure sensitive adhesive extruded from the molding die cylinder (7).

3. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 2, characterized in that: The liquid cooling assembly (8) comprises a liquid cooling cylinder (81), a liquid inlet pipe (82), a liquid outlet pipe (83) and a guide plate (84); the liquid cooling cylinder (81) is sleeved on the outer periphery of the forming mold cylinder (7); the guide plate (84) is arranged on the inner wall of the liquid cooling cylinder (81) and is arranged in a spiral shape; the guide plate (84) is used to divide the interior of the liquid cooling cylinder (81) into a spiral guide channel (10); the liquid inlet pipe (82) is arranged at the bottom of the liquid cooling cylinder (81); the liquid outlet pipe (83) is arranged at the top of the liquid cooling cylinder (81); and the liquid inlet pipe (82) and the liquid outlet pipe (83) are both connected to the guide channel (10).

4. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 3, characterized in that: The air cooling component (9) comprises an air cooling cylinder (91), an air inlet pipe (92) and an air outlet component (93); the air cooling cylinder (91) is sleeved on the circumferential periphery of the liquid cooling cylinder (81); the air inlet pipe (92) is arranged at the top of the air cooling cylinder (91); and the air outlet component (93) is arranged at the bottom of the air inlet pipe (92) and is arranged in a ring shape.

5. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 4, characterized in that: A swirl plate (11) is arranged at one end of the air cooling cylinder (91) close to the air inlet pipe (92), and a flow equalizing plate (12) is arranged below the swirl plate (11) in the air cooling cylinder (91). The flow equalizing plate (12) is provided with a plurality of groups of flow equalizing holes (13), and each group of the flow equalizing holes (13) is arranged in a circular array with the axis of the air cooling cylinder (91) as the center line. An air diffuser (14) is arranged at one end of the flow equalizing holes (13) close to the air outlet component (93).

6. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 5, characterized in that: The air outlet component (93) comprises a first ring plate (931) and a second ring plate (932); the first ring plate (931) and the second ring plate (932) are arranged on the bottom inner wall of the air-cooling cylinder (91) in sequence from top to bottom, and an air outlet channel (15) is formed between the first ring plate (931) and the second ring plate (932); a ventilation hole (16) is provided on the first ring plate (931); the ventilation hole (16) is used to connect the internal cavity of the air-cooling cylinder (91) and the air outlet channel (15).

7. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 1, characterized in that: A replacement cylinder (19) is detachably provided on the inner wall of the molding die cylinder (7), an anti-idiot block (20) is provided on the circumferential side wall of the replacement cylinder (19), an anti-idiot groove for inserting the anti-idiot block (20) is provided on the inner wall of the molding die cylinder (7), a screw rod (21) is provided on the top of the replacement cylinder (19), the screw rod (21) passes through the top wall of the molding die cylinder (7), and a locking nut (22) is provided on the screw rod (21).

8. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 7, characterized in that: The inner wall of the replacement cylinder (19) is provided with an anti-stick coating for preventing the hot-melt pressure-sensitive adhesive from adhering.

9. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 1, characterized in that: The pushing assembly (5) comprises a pushing motor (51), a rotating shaft (52) and a spiral blade (53); the rotating shaft (52) is coaxially rotatably arranged in the extrusion cylinder (2); the pushing motor (51) is arranged on the outer wall of the extrusion cylinder (2) and the output end of the pushing motor (51) is connected to the rotating shaft (52); the spiral blade (53) is arranged on the rotating shaft (52) and the spiral blade (53) is in sliding contact with the inner wall of the extrusion cylinder (2).

10. The extrusion equipment for producing hot melt pressure sensitive adhesive according to claim 1, characterized in that: The heating assembly (6) comprises a heating cylinder (61) and a heating wire (62); the heating cylinder (61) is sleeved on the circumferential periphery of the extrusion cylinder (2); the heating cylinder (61) is filled with a heating medium; the heating wire (62) is arranged on the circumferential inner wall of the heating cylinder (61), and the heating wire (62) is arranged in a spiral shape.

Images