Hot Melt Adhesive Film Casting Machine

Abstract

The present invention relates to a hot melt adhesive film casting machine, which relates to the technical field of plastic molding. The machine comprises a casting extruder, a wind diffusion precooling system, a cooling system, a cutting system, a pulling system, a residual material winding system and a main winding system which are arranged in sequence. An extrusion port is arranged at the end of the casting extruder. The wind diffusion precooling system comprises two wind vibration devices which are oppositely installed at the extrusion port, a precooling port is formed between the two wind vibration devices, the wind vibration devices are both connected to a fan, and the wind vibration devices vibrate at the precooling port position under the wind force of the fan, so that the extrusion size is accurate.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, in particular to a hot melt adhesive film casting machine. Background Art

[0002] The casting method adopted by the casting machine is to melt and plasticize the resin and extrude it through a slit die to make the molten material close to the cooling roller, and then obtain the finished product through the steps of peeling, stretching, slitting, and winding.

[0003] In the existing hot melt adhesive film casting machine, cooling takes time during melt forming. When the molten hot melt adhesive film is extruded from the slit-shaped die and reaches between the cooling rollers, the molten hot melt adhesive film shrinks under the action of tension, affecting the size of the hot melt adhesive film. Summary of the invention

[0004] In order to overcome the technical defects of the prior art, the present invention provides a hot melt adhesive film casting machine with precise extrusion size.

[0005] The technical solution adopted by the present invention is:

[0006] A hot melt adhesive film casting machine comprises a casting extruder, a wind diffusion precooling system, a cooling system, a cutting system, a pulling system, a residual material winding system and a main winding system which are arranged in sequence. An extrusion port is arranged at the end of the casting extruder. The wind diffusion precooling system comprises two wind vibration devices which are oppositely installed at the extrusion port, a precooling port is formed between the two wind vibration devices, the wind vibration devices are connected to a fan, and the wind vibration devices vibrate at the precooling port position under the wind force of the fan; the wind vibration device comprises a vibration reference plate and a vibration reference belt, the vibration reference belt is installed on the vibration reference plate, a precooling port is formed between the two vibration reference plates, and the vibration reference belt is installed at the precooling port position; a vibration expansion oblique plate is arranged on the vibration reference belt, each of the vibration expansion oblique plates is obliquely installed on the vibration reference belt, and each of the vibration expansion oblique plates is installed on the adjacent surfaces of the two vibration reference belts; the direction of each of the vibration expansion oblique plates is inclined toward the side of the precooling port.

[0007] Preferably, the cast film extruder comprises an extrusion motor, a screw, an extrusion shell and an extrusion head, wherein the screw is rotatably installed in the extrusion shell, the extrusion motor is transmission-connected to the screw, the extrusion head is installed at the end of the extrusion shell, and the extrusion head has a flat extrusion port.

[0008] Preferably, the cooling system comprises a plurality of cooling rollers, each of which is a hollow structure and is filled with cold water.

[0009] Preferably, the cutting system comprises a cutting cross bar and two cutting knives, each of the cutting knives is slidably mounted on the cutting cross bar, and each of the cutting knives is detachably fixed to the cutting cross bar.

[0010] Preferably, the pulling system comprises two traction rollers arranged opposite to each other, and each of the traction rollers is provided with a rubber surface.

[0011] The beneficial effects of the present invention are:

[0012] The hot melt adhesive film casting machine comprises a casting extruder, a wind diffusion precooling system, a cooling system, a cutting system, a pulling system, a residual material winding system and a main winding system which are arranged in sequence. The casting extruder is used for melting and extruding the hot melt adhesive film, the cooling system is used for quickly reducing the temperature of the molten hot melt adhesive film, the cutting system is used for accurately cutting the size of the hot melt adhesive film after the hot melt adhesive film is formed, the pulling system is used for pulling the hot melt adhesive to move, the residual material winding system is used for winding the cut residual material, the main winding system 7 is used for winding the finished product, the end of the casting extruder is provided with an extrusion port, the wind diffusion precooling system comprises two wind vibration devices oppositely installed at the extrusion port, the two wind vibration devices are used for winding the finished product, and the wind diffusion precooling system comprises two wind vibration devices oppositely installed at the extrusion port. A pre-cooling port is formed between the wind vibration devices, and the wind vibration devices are all connected to the fan. The wind vibration device vibrates at the pre-cooling port position under the wind force of the fan. On the one hand, the wind diffusion system is used to pre-cool the molten hot-melt adhesive film under the action of wind when it is just extruded, and on the other hand, it generates vibration under the action of wind, thereby vibrating the just-extruded molten hot-melt adhesive film, which can intermittently contact the just-extruded molten hot-melt adhesive film to further achieve heat transfer, so that the just-extruded molten hot-melt adhesive film can be quickly cooled down before it contacts the cooling system, thereby reducing the deformation of the just-extruded molten hot-melt adhesive film before it contacts the cooling system, especially shrinkage under tension, thereby increasing dimensional accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention.

[0014] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0015] Figure 3 This is a schematic diagram of the structure of the wind vibration device.

[0016] Figure 4 This is a cross-sectional schematic diagram of the wind diffusion precooling system.

[0017] Figure 5 Schematic diagram of the wind diffusion precooling system structure.

[0018] Figure 6 for Figure 5 Schematic diagram at point B in the middle.

[0019] Figure 7 This is a front view schematic diagram of the wind diffusion precooling system.

[0020] Figure 8This is a schematic diagram of the deformation of the vibration expansion inclined plate after vibration.

[0021] Description of reference numerals:

[0022] 1. Casting extruder; 11. Extrusion motor; 12. Extrusion housing; 13. Extrusion head;

[0023] 2. Wind diffusion precooling system; 21. Wind vibration device; 211. Precooling port; 212. Vibration reference plate; 213. Vibration reference belt; 2131. Vibration expansion inclined plate;

[0024] 3. Cooling system;

[0025] 4. Cutting system; 41. Cutting crossbar; 42. Cutting knife;

[0026] 5. Pulling system;

[0027] 6. Residual material rewinding system;

[0028] 7. Main winding system. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings:

[0030] like Figure 1 — Figure 8 As shown, this embodiment provides a hot melt adhesive film casting machine, including a casting extruder 1, a wind diffusion precooling system 2, a cooling system 3, a cutting system 4, a pulling system 5, a residual material winding system 6 and a main winding system 7 which are arranged in sequence. The casting extruder 1 is used to melt and extrude the hot melt adhesive film, the cooling system 3 is used to quickly reduce the temperature of the molten hot melt adhesive film, the cutting system 4 is used to accurately cut the size of the hot melt adhesive film after the hot melt adhesive film is formed, the pulling system 5 is used to pull the hot melt adhesive to move, the residual material winding system 6 is used to wind up the cut residual material, and the main winding system 7 is used to wind up the finished product. The end of the casting extruder 1 is provided with an extrusion port, and the wind diffusion precooling system 2 includes two wind vibration devices oppositely installed at the extrusion port. Device 21, a pre-cooling port 211 is formed between the two wind vibration devices 21, and the wind vibration devices 21 are all connected to the fan. The wind vibration devices 21 vibrate at the pre-cooling port 211 under the wind of the fan. On the one hand, the wind diffusion system is used to pre-cool the molten hot-melt adhesive film under the action of wind when it is just extruded, and on the other hand, it generates vibration under the action of wind, thereby vibrating the just-extruded molten hot-melt adhesive film, and can intermittently contact the just-extruded molten hot-melt adhesive film to further achieve heat transfer, so that the just-extruded molten hot-melt adhesive film can be quickly cooled before contacting the cooling system 3, and the deformation of the just-extruded molten hot-melt adhesive film before contacting the cooling system 3 is reduced, especially the shrinkage under tension, thereby increasing dimensional accuracy.

[0031] Specifically, the cast film extruder 1 includes an extrusion motor 11, a screw, an extrusion shell 12 and an extrusion head 13. The extrusion motor 11 is used to drive the screw to rotate, so that the screw rotates in the extrusion shell 12 and then extrude the molten hot melt adhesive film from the extrusion head 13. The screw is rotatably installed in the extrusion shell 12, the extrusion motor 11 is connected to the screw, and the extrusion head 13 is installed at the end of the extrusion shell 12. The extrusion head 13 has a flat extrusion port to facilitate the extrusion head 13 to extrude the hot melt adhesive film.

[0032] Specifically, the cooling system 3 includes a number of cooling rollers, each of which is a hollow structure and is filled with cold water. The cold water is circulated and prepared by a chiller. The cold water prepared by the chiller is passed into the cooling rollers through a rotary joint. This is a prior art and will not be described in detail here. It is convenient for quickly cooling the hot melt adhesive film and minimizing the shrinkage problem of the molten hot melt adhesive film due to tension.

[0033] Specifically, the cutting system 4 includes a cutting cross bar 41 and two cutting knives 42. Each cutting knife 42 can be slidably installed on the cutting cross bar 41 to adjust the cutting position. Each cutting knife 42 is detachably fixed to the cutting cross bar 41 by screws to adjust the distance between each cutting knife 42 and accurately adjust the size of the hot melt adhesive film.

[0034] Specifically, the pulling system 5 includes two traction rollers arranged opposite to each other, each of which is provided with a rubber surface to ensure traction. At this time, the molten adhesive film has cooled down, and the friction coefficient between the rubber surface and the cooled hot melt adhesive film is large, which is convenient for traction.

[0035] Specifically, the wind vibration device 21 includes a vibration reference plate 212 and a vibration reference belt 213. The vibration reference belt 213 is installed on the vibration reference plate 212. The two vibration reference plates 212 form a pre-cooling port 211. The vibration reference belt 213 is installed at the position of the pre-cooling port 211. The vibration reference belt 213 vibrates under the wind force blown out of the pre-cooling port 211, intermittently hitting the molten hot-melt adhesive film, so that the heat on the hot-melt adhesive film is intermittently transferred to the vibration reference belt 213, which is convenient for quickly cooling the hot-melt adhesive film.

[0036] Specifically, the vibration reference belt 213 is provided with a vibration expansion bevel 2131, each vibration expansion bevel 2131 is installed obliquely on the vibration reference belt 213, and each vibration expansion bevel 2131 is installed on the adjacent surfaces of the two vibration reference belts 213, and each vibration expansion bevel 2131 is directed toward the side of the pre-cooling port 211. The vibration expansion bevel 2131 vibrates and beats the molten hot-melt adhesive film, which will pull the molten hot-melt adhesive film in the expansion direction, overcoming the rapid shrinkage of the molten hot-melt adhesive film under the action of tension. Please note that after the vibration expansion bevel 2131 vibrates and beats the molten hot-melt adhesive film, beating marks will indeed be formed on the molten hot-melt adhesive film, but please note that since this product is a hot-melt adhesive film and is used for compounding with other film profiles, such marks do not affect the use, and more importantly, since the molten hot-melt adhesive film will not be truly cooled thoroughly until it passes through the subsequent cooling roller, the marks of the molten hot-melt adhesive film on the cooling roller will be basically flattened on the cooling roller, thereby smoothing out the surface dents.

[0037] like Figure 8 As shown, the deformed vibration expansion bevel 2131 will generate lateral traction on the molten hot melt adhesive film. Since the present application prevents the initially molten hot melt adhesive film from shrinking under the action of tension, the forming width of the present application is accurate, the width of the hot melt adhesive film cut by the subsequent cutting knife 42 is reduced, and waste is reduced.

[0038] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Hot melt adhesive film casting machine, characterized in that: The invention comprises a cast extruder, a wind diffusion precooling system, a cooling system, a cutting system, a pulling system, a residual material winding system and a main winding system which are arranged in sequence. The end of the cast extruder is provided with an extrusion port. The wind diffusion precooling system comprises two wind vibration devices which are oppositely installed at the extrusion port. A precooling port is formed between the two wind vibration devices. The wind vibration devices are both connected to a fan. The wind vibration devices vibrate at the precooling port under the wind force of the fan. The wind vibration device comprises a vibration reference plate and a vibration reference belt, wherein the vibration reference belt is mounted on the vibration reference plate, a pre-cooling port is formed between the two vibration reference plates, and the vibration reference belt is mounted at the pre-cooling port position; The vibration reference belt is provided with a vibration expansion oblique plate, each of which is obliquely installed on the vibration reference belt, and each of which is installed on adjacent surfaces of two vibration reference belts; The direction of each of the vibration expansion inclined plates is inclined toward the side of the pre-cooling port.

2. The hot melt adhesive film casting machine according to claim 1, characterized in that: The cast extruder comprises an extrusion motor, a screw, an extrusion shell and an extrusion head. The screw is rotatably installed in the extrusion shell. The extrusion motor is transmission-connected to the screw. The extrusion head is installed at the end of the extrusion shell and has a flat extrusion port.

3. The hot melt adhesive film casting machine according to claim 1, characterized in that: The cooling system comprises a plurality of cooling rollers, each of which is a hollow structure and is filled with cold water.

4. The hot melt adhesive film casting machine according to claim 1, characterized in that: The cutting system comprises a cutting cross bar and two cutting knives. Each of the cutting knives is slidably mounted on the cutting cross bar, and each of the cutting knives is detachably fixed to the cutting cross bar.

5. The hot melt adhesive film casting machine according to claim 1, characterized in that: The pulling system comprises two traction rollers arranged opposite to each other, and each of the traction rollers is provided with a rubber surface.

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