A hot melt extruder and process for waterproof and antistatic composite cover tape

Abstract

The invention relates to the technical field of extrusion molding, and specifically to a hot-melt extruder for waterproof and antistatic composite cover tape and a process thereof; the machine frame comprises a frame, an extruder body is fixedly mounted on the upper end of the frame; a mounting frame is fixedly mounted on the upper end of the frame; the invention cooperates with an adjusting plate and a screw rod, so that a driving motor drives the screw rod to rotate, so that the screw rod pushes the adjusting plate to slide along a T-shaped opening, thereby changing the width of the T-shaped opening, and adjusting the thickness of a film extruded from the T-shaped opening, and during the adjustment process, the extruder body and the die head are always connected by an injection molding tube, even if the adjusting plate extrude the molten raw material remaining in the T-shaped opening, the extruded molten raw material only flows out from the T-shaped opening, which not only prevents the molten raw material from penetrating into the die head and reduces the difficulty of cleaning the die head, but also prevents the molten raw material from contacting the components in the die head, so as to ensure the normal and stable use of the components in the die head, thereby increasing the service life of the die head.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion molding, in particular to a hot-melt extruder for waterproof and antistatic composite cover tape and a process thereof. Background Art

[0002] Existing cover tapes are mostly made of waterproof materials such as polyurethane (PU) or polyethylene (PE), and the production process steps are as follows: first, the required film substrate is extruded through an extruder; the extruded film substrate needs to be rolled up to obtain the required film roll, and then two film rolls are selected and placed on the main unwinder and the auxiliary unwinder respectively, so that the main unwinder conveys the film roll to the glue coating machine for uniform glue coating, and the glued film needs to be dried in an oven, and composited with the film substrate conveyed by the auxiliary unwinder at the conveying composite machine. During the composite process, the antistatic coating is sprayed between the two composite film substrates, and finally the composite cover tape is trimmed and rolled up according to the size requirements; the required composite cover tape is obtained;

[0003] Moreover, during the compounding process of the cover tape, the film substrates of the film substrate rolls installed by the main unwinding and the auxiliary unwinding are mostly double-layered. This is because the existing compounding of the cover tape is mostly thermal compounding, which can uniformly heat and press the film substrate of the cover tape to reduce the formation of bubbles and wrinkles, thereby ensuring the flatness and thickness consistency of the composite layer; therefore, the design of a double-layer film substrate is adopted, so that the film substrate can better disperse heat during the compounding process, making the heating and cooling processes more uniform, reducing the risk of material deformation and poor adhesion; the existing double-layer film substrates are mostly extruded by a double-layer co-extrusion extruder, that is, the double-layer co-extrusion extruder extrudes two single-layer film substrates through the two T-shaped ports of the die; and then the two single-layer film substrates extruded from the two T-shaped ports are pressed into a double-layer film substrate; the opening size of the die directly determines the thickness of the double-layer film substrate. When the thickness of the multi-layer film produced needs to be adjusted, the die needs to be replaced due to the fixed size of the mold opening, which makes the operation complicated and reduces production efficiency;

[0004] In this regard, there are also technical solutions for adjusting the die opening in the prior art. For example, a Chinese patent with publication number CN221249785U discloses a co-extrusion die head for multi-layer film processing, including a mounting seat, a die box is arranged at the upper end of the mounting seat, a thickness adjustment mechanism is arranged in the die box, a feeding assembly is arranged on the wall of the die box at the side where the thickness adjustment mechanism feeds, and a cooling mechanism is arranged at the upper end of the thickness adjustment mechanism. This technical solution realizes the multi-layer film output by the co-extrusion die head by arranging the thickness adjustment mechanism. Adjustment of molding thickness; however, during the adjustment process, the feed assembly needs to be withdrawn a certain distance to leave enough moving space for the top plate, which results in a gap between the feed assembly and the top plate. If there is residual molten raw material between the top plate and the bottom plate, the molten raw material will be squeezed out through the gap between the feed assembly and the top plate, causing the molten raw material to rush into the die head, which not only increases the difficulty of cleaning the die head, but also causes the molten raw material to contact the parts in the die head, thereby causing blockage or wear problems to other parts in the die head; affecting the service life of the die head;

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes a waterproof and antistatic composite cover tape hot melt extruder and a process thereof, which solves the above technical problems. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the present invention proposes a waterproof and antistatic composite cover tape hot melt extruder and a process thereof. The present invention cooperates with an adjusting plate and a screw so that a driving motor drives the screw to rotate, so that the screw pushes the adjusting plate to slide along the T-shaped mouth, thereby changing the width of the T-shaped mouth, and realizing the adjustment of the thickness of the film extruded from the T-shaped mouth. During the adjustment process, the extruder body and the die head are always connected by an injection molding tube. Even if the adjusting plate extrude the molten raw material remaining in the T-shaped mouth, the extruded molten raw material only flows out from the T-shaped mouth. This not only avoids the molten raw material from penetrating into the die head and reduces the difficulty of cleaning the die head, but also prevents the molten raw material from contacting the components in the die head, so as to ensure the normal and stable use of the components in the die head, thereby increasing the service life of the die head.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the waterproof and antistatic composite cover tape hot melt extruder described in the present invention comprises a frame, an extruder body is fixedly installed on the upper end of the frame; a mounting frame is fixedly installed on the upper end of the frame; a die head is installed below the mounting frame; the die head and the extruder body are connected by an injection molding tube, and the number of the die heads is two; a T-shaped opening is provided on the side of the two die heads close to each other; an adjustment plate is slidingly and sealingly connected in the T-shaped opening; a screw is threadedly connected to the side wall of the die head; the screw is rotatably connected to the adjustment plate; a transmission wheel is rotatably connected to the end of the screw away from the adjustment plate; the transmission wheels are connected by a transmission strip for belt transmission; a guide rod is provided between the two screws; the guide rod is used to guide the transmission strip; a drive motor is fixedly installed on the mounting frame; the drive motor is used to drive the transmission wheel to rotate; a cooling chamber connected to the outside is provided inside the die head.

[0008] Preferably, a bracket is provided between the mounting frame and the die head; the bracket is fixedly connected to the lower end of the mounting frame; slide plates are provided on both sides of the bracket; the slide plates are slidably connected to the bracket; the slide plates are fixedly connected to the bracket by a hydraulic push rod; the die head is rotatably connected to the lower end of the slide plate; a servo motor is fixedly installed on one side of the bracket; a driving gear is fixedly connected to the output end of the servo motor; teeth are fixedly connected to the hinged end of the die head close to the bracket; the driving gear is meshed with the teeth; a straight plate is provided between the guide rod and the bracket; the straight plate is fixedly connected to the bracket by an electric push rod; the guide rod and the straight plate are rotatably connected by a hinge rod.

[0009] Preferably, a flange is fixedly connected to the surface of the transmission bar; engaging grooves are provided on the surfaces of the transmission wheel and the guide rod; the flange engages with the engaging groove; there are two guide rods; the two guide rods are rotatably connected via a connecting rod; a worm wheel is fixedly connected to one side of the guide rod; a worm meshing with the worm wheel is provided on one side of the worm wheel; the worm is fixedly connected to the output end of the drive motor.

[0010] Preferably, a rectangular rod is arranged between the screw and the transmission wheel; the rectangular rod is fixedly connected to the screw; a rectangular groove is opened at one end of the transmission wheel close to the rectangular rod; the rectangular rod is slidably connected in the rectangular groove; and the transmission wheel is rotationally connected to the die head.

[0011] Preferably, an arc plate is provided below the die head; the arc plate is rotatably connected to the die head; an electro-hydraulic push rod is provided between the arc plate and the die head; one end of the electro-hydraulic push rod is hinged to the arc plate, and the other end is hinged to the outer wall of the die head.

[0012] Preferably, one end of the arc-shaped plate away from the die head is rotatably connected to a roller.

[0013] Preferably, a cavity is provided inside the rotating roller; and the rotating roller and the arc-shaped plate are both made of PTFE material.

[0014] A hot melt extrusion process for a waterproof and antistatic composite cover tape, which is applicable to the hot melt extruder for the above-mentioned waterproof and antistatic composite cover tape, and the steps of the process are as follows:

[0015] S1: First, the servo motor is controlled to drive the die head to rotate through the driving gear and teeth to adjust the inclination angle of the die head. At the same time, the hydraulic push rod and the electro-hydraulic push rod are controlled to operate so that the hydraulic push rod adjusts the distance between the two die heads and the electro-hydraulic push rod adjusts the fit between the guide rod and the transmission bar to ensure that the guide rod, the transmission bar and the transmission wheel are in a stable transmission state.

[0016] S2: Then control the driving motor to drive the guide rod to rotate, so that the guide rod drives the transmission wheel to rotate through the transmission bar, so that the transmission wheel drives the screw to push the adjustment plate to slide in the T-shaped mouth, so that the distance between the side of the T-shaped mouth away from the screw and the adjustment plate is the set distance; at this time, the adjustment of the die head is completed;

[0017] S3: Pour polyurethane (PU) or polyethylene (PE) as raw materials into the hopper of the extruder, so that the extruder melts the raw materials and squeezes them into the die head, so that the molten raw materials entering the die head will flow out through the T-shaped port. At the same time, the external cooling fan is controlled to deliver cold air flow into the cooling chamber, so as to shape the film flowing out of the T-shaped port;

[0018] S4: The user pulls the film flowing out of the T-shaped openings of the two die heads, passes through the two arc-shaped plates, and is stretched to the laminating roller for lamination and winding; thereby obtaining the film substrate required for the waterproof and antistatic composite cover tape;

[0019] S5: Finally, the film substrate is coated with AC agent, dried in an oven, thermally laminated with an antistatic layer, cut into sheets and rolled up to obtain the desired waterproof and antistatic composite cover tape.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention cooperates with the adjusting plate and the screw so that the driving motor drives the screw to rotate, so that the screw pushes the adjusting plate to slide along the T-shaped opening, thereby changing the width of the T-shaped opening and adjusting the thickness of the film extruded from the T-shaped opening. During the adjustment process, the extruder body and the die head are always connected through the injection molding tube. Even if the adjusting plate extrude the molten raw material remaining in the T-shaped opening, the extruded molten raw material only flows out from the T-shaped opening, which not only prevents the molten raw material from penetrating into the die head and reduces the difficulty of cleaning the die head, but also prevents the molten raw material from contacting the parts in the die head, so as to ensure the normal and stable use of the parts in the die head, thereby increasing the service life of the die head.

[0022] 2. The present invention can prevent the film from shaking due to the effect of wind by setting a cooling chamber. When the molten raw material flows into the T-shaped mouth, the external air cooler delivers cold air into the cooling chamber, so that the cold air entering the cooling chamber can pre-cool the film in the T-shaped mouth through the inner wall of the cooling chamber, so that the molten film flowing out of the T-shaped mouth is quickly shaped, thereby solidifying its shape and thickness; this helps to maintain the geometric stability of the film before passing through the laminating roller, reduce the change in size or thickness caused by deformation or flow in the molten state; and improves the uniformity of the thickness of the film extruded by the extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0024] Figure 1 is a stereogram of the present invention;

[0025] Figure 2 is a stereogram of the die head used in the present invention;

[0026] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 It is a schematic structural diagram of the die head used in the present invention;

[0028] Figure 5 yes Figure 4 The enlarged view of point B in the middle;

[0029] Figure 6 It is a process flow chart of the present invention;

[0030] In the figure: 1, frame; 11, extruder body; 12, mounting frame; 13, die head; 131, T-shaped mouth; 132, adjustment plate; 133, screw; 14, cooling chamber; 15, bracket; 16, slide plate; 161, hydraulic push rod; 17, servo motor; 171, driving gear; 172, teeth; 18, arc plate; 181, roller; 182, cavity; 19, electro-hydraulic push rod; 2, transmission wheel; 21, transmission bar; 211, flange; 22, guide rod; 221, worm gear; 23, driving motor; 24, straight plate; 241, electric push rod; 242, hinged rod; 25, meshing groove; 26, worm; 27, rectangular groove; 271, rectangular rod. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] like Figures 1 to 6As shown, a hot melt extruder for waterproof and antistatic composite cover tapes described in the present invention comprises a frame 1, an extruder body 11 is fixedly mounted on the upper end of the frame 1; a mounting frame 12 is fixedly mounted on the upper end of the frame 1; a die head 13 is mounted below the mounting frame 12; the die head 13 is connected to the extruder body 11 through an injection molding pipe, and two die heads 13 are provided; a T-shaped opening 131 is provided on one side of the two die heads 13 close to each other; an adjusting plate 132 is slidably and sealably connected in the T-shaped opening 131; a side wall of the die head 13 A screw rod 133 is threadedly connected; the screw rod 133 is rotatably connected to the adjustment plate 132; the end of the screw rod 133 away from the adjustment plate 132 is rotatably connected to the transmission wheel 2; the transmission wheels 2 are connected by a transmission bar 21 for belt transmission; a guide rod 22 is arranged between the two screw rods 133; the guide rod 22 is used for guiding the transmission bar 21; a driving motor 23 is fixedly mounted on the mounting frame 12; the driving motor 23 is used for driving the transmission wheel 2 to rotate; a cooling chamber 14 connected to the outside is opened inside the die head 13.

[0033] As an embodiment of the present invention, a bracket 15 is arranged between the mounting frame 12 and the die head 13; the bracket 15 is fixedly connected to the lower end of the mounting frame 12; slide plates 16 are arranged on both sides of the bracket 15; the slide plates 16 are slidably connected to the bracket 15; the slide plates 16 and the bracket 15 are fixedly connected by a hydraulic push rod 161; the die head 13 is rotatably connected to the lower end of the slide plate 16; a servo motor 17 is fixedly installed on one side of the bracket 15; the output end of the servo motor 17 is fixedly connected to a driving gear 171; the hinged end of the die head 13 close to the bracket 15 is fixedly connected to teeth 172; the driving gear 171 is meshed with the teeth 172; a straight plate 24 is arranged between the guide rod 22 and the bracket 15; the straight plate 24 is fixedly connected to the bracket 15 by an electric push rod 241; the guide rod 22 and the straight plate 24 are rotatably connected by a hinge rod 242.

[0034] As an embodiment of the present invention, a flange 211 is fixedly connected to the surface of the transmission bar 21; the surfaces of the transmission wheel 2 and the guide rod 22 are provided with engaging grooves 25; the flange 211 engages with the engaging groove 25; there are two guide rods 22; the two guide rods 22 are rotatably connected via a connecting rod; a worm wheel 221 is fixedly connected to one side of the guide rod 22; a worm 26 meshing with the worm wheel 221 is provided on one side of the worm wheel 221; the worm 26 is fixedly connected to the output end of the drive motor 23.

[0035] As an embodiment of the present invention, a rectangular rod 271 is provided between the screw 133 and the transmission wheel 2; the rectangular rod 271 is fixedly connected to the screw 133; a rectangular groove 27 is provided at one end of the transmission wheel 2 close to the rectangular rod 271; the rectangular rod 271 is slidably connected in the rectangular groove 27; the transmission wheel 2 is rotatably connected to the die head 13;

[0036] When working, when adjusting the opening of the existing die 13, it is necessary to first withdraw the feed assembly by a certain distance to leave enough moving space for the top plate, which results in a gap between the feed assembly and the top plate. If there is residual molten raw material between the top plate and the bottom plate, the molten raw material will be squeezed out through the gap between the feed assembly and the top plate, thereby causing the molten raw material to rush into the die 13, which not only increases the difficulty of cleaning the die 13, but also causes the molten raw material to contact the parts in the die 13, thereby causing blockage or wear problems to other parts in the die 13, affecting the service life of the die 13;

[0037] In this regard, the present invention cooperates with the adjusting plate 132 and the screw 133, so that the driving motor 23 drives the screw 133 to rotate, so that the screw 133 pushes the adjusting plate 132 to slide along the T-shaped opening 131, thereby changing the width of the T-shaped opening 131, and adjusting the thickness of the film extruded from the T-shaped opening 131. In addition, during the adjustment process, the extruder body 11 and the die head 13 are always connected through the injection molding tube. Even if the adjusting plate 132 extrude the molten raw material remaining in the T-shaped opening 131, the extruded molten raw material only flows out from the T-shaped opening 131, which not only prevents the molten raw material from penetrating into the die head 13 and reduces the difficulty of cleaning the die head 13, but also prevents the molten raw material from contacting the components in the die head 13, so as to ensure the normal and stable use of the components in the die head 13, thereby increasing the service life of the die head 13.

[0038] The existing double-layer film processing is to first use an extruder to extrude two single-layer films through two parallel die heads 13, and when the two single-layer films fall to the laminating roller, the laminating roller presses the two single-layer films into a double-layer film; this is because directly extruding a single-layer film with a larger thickness will result in uneven thickness or structural defects; layered extrusion and lamination can reduce these defects and improve the quality of the final product; in the initial state, one end of the cooling chamber 14 of the die head 13 is connected to the air cooler, and the other end is connected to the exhaust duct; the adjustment plate 132 contacts the inner wall of the T-shaped opening 131, and at this time the width of the T-shaped opening 131 is the largest, that is, the opening is the largest; the user controls the drive motor 23 to operate, so that the drive motor 23 can drive the worm 26 to rotate, so that the worm 26 drives the worm wheel 221 meshing with it to rotate synchronously, so that the worm wheel 221 can drive the guide rod 22 to rotate during the rotation, and the guide rod 22 can drive the surface meshing groove 25 to rotate synchronously during the rotation, The meshing groove 25 drives the transmission bar 21 to circle between the two transmission wheels 2 by pushing the flange 211 meshed with it, and the surface of the transmission wheel 2 is also provided with a meshing groove 25, so that the transmission bar 21 drives the transmission wheel 2 to rotate by the flange 211 meshed in the meshing groove 25 on the surface of the transmission wheel 2, so that the transmission wheel 2 can drive the rectangular rod 271 in the rectangular groove 27 to rotate synchronously, so that the rectangular rod 271 drives the screw 133 fixed to it to rotate during the rotation process; through the cooperation between the flange 211 and the meshing groove 25, the guide rod 22 drives the flange 211 through the meshing groove 25 on the surface to drive the transmission bar 21 to circle between the two transmission wheels 2 whose center lines intersect, so that the transmission bar 21 drives the two transmission wheels 2 whose center lines intersect to rotate, thereby improving the transmission stability between the guide rod 22, the transmission bar 21 and the transmission wheel 2; thereby ensuring that the drive motor 23 can drive the screw 133 to rotate normally and stably, so that the actual application effect of the present invention is improved;

[0039] Since the screw 133 is connected with the outer wall of the die head 13 by spiral transmission, the rotating screw 133 moves into the die head 13, so that the screw 133 pushes the adjusting plate 132 connected with it to slide toward the other side of the T-shaped opening 131, so that the distance between the screw 133 and the inner wall of the other side of the T-shaped opening 131 is reduced, so that the width of the T-shaped opening 131 is continuously reduced. After the width of the T-shaped opening 131 is reduced to a desired size, the driving motor 23 is controlled to stop, and then the user selects polyurethane or polyethylene particles as raw materials, and pours the raw materials into the hopper of the extruder, so that the raw materials entering the extruder through the hopper are squeezed by the extruder and move toward the die head 13, so that at the same time, the heating component in the extruder melts the raw materials, so that the extruder injects the molten raw materials into the die head 13 through the injection tube, so that the molten raw materials flow out through the T-shaped opening 131; when the existing film is extruded, most of them are shaped by blowing cold air directly to the film, which makes the film easier to cool during the cooling and shaping process. The film is prone to shaking, which will not only lead to uneven cooling of the film surface, but also cause deformation of the film, thereby affecting the uniformity of the film thickness, making the base material thickness of the pressed cover tape uneven, and finally leading to uneven thickness of the waterproof and antistatic composite cover tape, which makes it easy for the cover tape to have poor sealing when closing the container, thereby affecting the sealing effect of the cover tape; the setting of the cooling chamber 14 can prevent the film from shaking due to the action of wind. When the molten raw material flows into the T-shaped mouth 131, the external air cooler delivers cold air into the cooling chamber 14, so that the cold air entering the cooling chamber 14 can pre-cool the film in the T-shaped mouth 131 through the inner wall of the cooling chamber 14, so that the molten film flowing out of the T-shaped mouth 131 is quickly shaped, thereby solidifying its shape and thickness; this helps to maintain the geometric stability of the film before passing through the lamination roller, and reduce the change in size or thickness caused by deformation or flow in the molten state; improves the uniformity of the thickness of the film extruded by the extruder;

[0040] When the extruder uses two facing dies 13 to extrude single-layer films respectively and presses them into a double-layer film through a lamination roller, the inclination angle between the T-shaped opening 131 of the die 13 and the ground usually needs to be adjusted according to the extruded thickness of the film. This is because the inclination angle of the die 13 directly affects the flow resistance of the molten material in the die 13. Appropriate adjustment of the inclination angle of the die 13 can reduce or increase the flow resistance of the molten raw material in the die 13, and the increase or decrease in the flow resistance directly leads to a slowdown or increase in the flow speed of the molten raw material in the die 13, thereby reducing the residence time of the molten material with a smaller thickness in the die 13; when it is necessary to adjust the inclination angle of the die 13, the user controls the servo motor 17 to drive the driving gear 171 to rotate, so that the driving gear 171 can drive the die 13 to rotate relative to the slide 16 through the teeth 172 meshing therewith, so that the die 13 drives the T-shaped opening 131 at the lower end to rotate, so that the T-shaped opening 131 of the die 13 The inclination angle between the mouth 131 and the ground changes; when the width of the T-mouth 131 is reduced due to adjustment, the inclination angle of the control die head 13 is increased, so that the flow resistance of the molten raw material in the T-mouth 131 is reduced, so that the flow speed is accelerated, thereby reducing the retention time of the molten raw material in the T-mouth 131, reducing the cooling time of the thinner film in the cooling chamber 14, avoiding the thinner film from solidifying due to excessive cooling, and ensuring that the two films have appropriate temperature and rigidity before reaching the lamination roller to achieve a good lamination effect; similarly, when the width of the T-mouth 131 is increased, the inclination angle of the control die head 13 is reduced, so that the flow resistance of the molten raw material in the T-mouth 131 is increased, so that the residence time of the thicker molten material in the die head 13 is increased; thereby increasing the cooling time of the thicker film, ensuring that the thicker film is solidified in shape and thickness when it is extruded from the T-mouth 131; thereby improving the practicality of the present invention;

[0041] When the die heads 13 rotate in the directions away from each other, the two die heads 13 will drive the transmission wheels 2 to move in the directions away from each other, so that the two transmission wheels 2 will generate a pulling force on the transmission bar 21 between the two transmission wheels 2, causing the transmission bar 21 to be broken. In this regard, the hydraulic push rods 161 are set so that the hydraulic push rods 161 on both sides can pull the two slides 16 to drive the two die heads 13 closer to each other, so that the distance between the transmission wheels 2 is reduced, thereby preventing the transmission wheels 2 from generating a pulling force on the transmission bar 21; and when the transmission wheels 2 rotate downward, the transmission wheels 2 will drive the transmission bar 21 to descend, so that the guide rod 22 cannot push the transmission bar 21 to be tightened, which may easily cause the loose transmission bar 21 to fall off. In this regard, an electric push rod 241 is set so that the electric push rod 241 can push the guide rod 22 to descend, so that the guide rod 22 pushes the transmission bar 21 to be tightened, thereby preventing the transmission bar 21 from falling off, thereby ensuring that the transmission bar 21 can be used normally and stably.

[0042] As an embodiment of the present invention, an arc plate 18 is arranged below the die head 13; the arc plate 18 is rotatably connected to the die head 13; an electro-hydraulic push rod 19 is arranged between the arc plate 18 and the die head 13; one end of the electro-hydraulic push rod 19 is hinged to the arc plate 18, and the other end is hinged to the outer wall of the die head 13.

[0043] As an embodiment of the present invention, one end of the arc plate 18 away from the die head 13 is rotatably connected to a roller 181 .

[0044] As an embodiment of the present invention, a cavity 182 is provided inside the roller 181; the roller 181 and the arc plate 18 are both made of PTFE material;

[0045] During operation, when the two films descend to the laminating roller below, the laminating roller will press the two films together, and when the laminating roller rotates, it will drive the surrounding air to flow; this air flow will form an airflow on the surface of the film, so that the airflow flowing along the surface of the film will push the film to shake; for this, an arc plate 18 is provided so that when the airflow flows to the arc plate 18, the airflow will flow along the arc plate 18 in the direction away from the film, thereby guiding the airflow away from the film and preventing the airflow from pushing the film to shake; and the setting of the rotating roller 181 is to make the arc plate 18 The plate 18 is in rolling contact with the film through the roller 181. On the one hand, the roller 181 can be in rolling contact with the film, which can reduce the friction between the roller 181 and the film, and avoid the arc plate 18 and the film from sliding contact and scratching the film; on the other hand, the roller 181 is in rolling contact with the film, so that the roller 181 limits the two films, so as to reduce the shaking frequency of the film under the roller 181, and at the same time avoid the shaking film under the roller 181 to drive the film above the roller 181 to shake, so as to prevent the film just squeezed out from the T-shaped mouth 131 from shaking. The arc plate 18 can also guide the two single-layer films to ensure that the single-layer films can fall from above the laminating roller, so as to facilitate the laminating roller to laminat e them; and the setting of the electro-hydraulic push rod 19 is to control the electro-hydraulic push rod 19 to push the arc plate 18 to rotate relative to the lower end surface of the die head 13 after adjusting the inclination angle of the die head 13, so as to adjust the position of the arc plate 18, so as to ensure that the arc plate 18 can drive the roller 181 to effectively limit the film between the two arc plates 18; and by setting the roller 181 to P TFE material reduces the friction coefficient of the roller 181, and reduces the friction between the roller 181 and the film, and a cavity 182 is provided inside the roller 181; and the arc plate 18 is made of PTFE material in order to reduce the gravity of the roller 181 and the arc plate 18, thereby reducing the pulling force of the electro-hydraulic push rod 19, thereby reducing the load of the electro-hydraulic push rod 19, that is, a small-sized electro-hydraulic push rod 19 can be used to complete the pulling of the arc plate 18, thereby reducing production costs and reducing energy consumption; so that the actual application effect of the present invention is further improved.

[0046] A hot melt extrusion process for a waterproof and antistatic composite cover tape, which is applicable to the hot melt extruder for the above-mentioned waterproof and antistatic composite cover tape, and the steps of the process are as follows:

[0047] S1: First, the servo motor 17 is controlled to drive the die head 13 to rotate through the driving gear 171 and the teeth 172 to adjust the inclination angle of the die head 13. At the same time, the hydraulic push rod 161 and the electro-hydraulic push rod 19 are controlled to operate, so that the hydraulic push rod 161 adjusts the distance between the two die heads 13, and the electro-hydraulic push rod 19 adjusts the guide rod 22 to fit the transmission bar 21, so as to ensure that the guide rod 22, the transmission bar 21 and the transmission wheel 2 are in a stable transmission state;

[0048] S2: Then control the driving motor 23 to drive the guide rod 22 to rotate, so that the guide rod 22 drives the transmission wheel 2 to rotate through the transmission bar 21, so that the transmission wheel 2 drives the screw 133 to push the adjustment plate 132 to slide in the T-shaped opening 131, so that the distance between the side of the T-shaped opening 131 away from the screw 133 and the adjustment plate 132 is the set distance; at this time, the adjustment of the die head 13 is completed;

[0049] S3: Pour polyurethane (PU) or polyethylene (PE) as raw material into the hopper of the extruder, so that the extruder melts the raw material and squeezes it into the die head 13, so that the molten raw material entering the die head 13 flows out through the T-shaped port 131, and at the same time, control the external cooling fan to deliver cold air flow into the cooling chamber 14, so as to shape the film flowing out of the T-shaped port 131;

[0050] S4: The user pulls the film flowing out of the T-shaped openings 131 of the two die heads 13, and the film passes through the two arc-shaped plates 18, and is stretched to the laminating roller for lamination and winding; thereby obtaining the film substrate required for the waterproof and antistatic composite cover tape;

[0051] S5: Finally, the film substrate is coated with AC agent, dried in an oven, thermally laminated with an antistatic layer, cut into sheets and rolled up to obtain the desired waterproof and antistatic composite cover tape.

[0052] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining 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 fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hot melt extruder for waterproof and antistatic composite cover tape, comprising a frame (1), an extruder body (11) is fixedly mounted on the upper end of the frame (1); a mounting frame (12) is fixedly mounted on the upper end of the frame (1); a die head (13) is mounted below the mounting frame (12); the die head (13) is connected to the extruder body (11) through an injection molding pipe, characterized in that: The number of the die heads (13) is two; a T-shaped opening (131) is provided on a side of the two die heads (13) close to each other; an adjustment plate (132) is slidably sealed in the T-shaped opening (131); a screw rod (133) is threadedly connected to the side wall of the die head (13); the screw rod (133) is rotatably connected to the adjustment plate (132); the end of the screw rod (133) away from the adjustment plate (132) is rotatably connected to a transmission wheel (2); the transmission wheels (2) are connected to each other by a transmission bar (21); a guide rod (22) is provided between the two screw rods (133); the guide rod (22) is used to guide the transmission bar (21); a driving motor (23) is fixedly mounted on the mounting frame (12); the driving motor (23) is used to drive the transmission wheel (2) to rotate; a cooling chamber (14) connected to the outside is provided inside the die head (13); A bracket (15) is provided between the mounting frame (12) and the die head (13); the bracket (15) is fixedly connected to the lower end of the mounting frame (12); slide plates (16) are provided on both sides of the bracket (15); the slide plates (16) are slidably connected to the bracket (15); the slide plates (16) and the bracket (15) are fixedly connected via a hydraulic push rod (161); the die head (13) is rotatably connected to the lower end of the slide plate (16); a servo motor (17) is fixedly installed on one side of the bracket (15); The output end of the servo motor (17) is fixedly connected with a driving gear (171); the hinged end of the die head (13) close to the bracket (15) is fixedly connected with teeth (172); the driving gear (171) is meshed with the teeth (172); a straight plate (24) is arranged between the guide rod (22) and the bracket (15); the straight plate (24) and the bracket (15) are fixedly connected via an electric push rod (241); the guide rod (22) and the straight plate (24) are rotatably connected via a hinge rod (242); The surface of the transmission bar (21) is fixedly connected with a flange (211); the surfaces of the transmission wheel (2) and the guide rod (22) are both provided with an engagement groove (25); the flange (211) is engaged with the engagement groove (25); there are two guide rods (22); the two guide rods (22) are rotatably connected via a connecting rod; one side of the guide rod (22) is fixedly connected with a worm wheel (221); one side of the worm wheel (221) is provided with a worm (26) engaged with the worm wheel; the worm (26) is fixedly connected to the output end of the drive motor (23); A rectangular rod (271) is arranged between the screw rod (133) and the transmission wheel (2); the rectangular rod (271) is fixedly connected to the screw rod (133); a rectangular groove (27) is provided at one end of the transmission wheel (2) close to the rectangular rod (271); the rectangular rod (271) is slidably connected in the rectangular groove (27); and the transmission wheel (2) is rotationally connected to the die head (13).

2. A hot melt extruder for waterproof and antistatic composite cover tape according to claim 1, characterized in that: An arc plate (18) is arranged below the die head (13); the arc plate (18) is rotatably connected to the die head (13); an electro-hydraulic push rod (19) is arranged between the arc plate (18) and the die head (13); one end of the electro-hydraulic push rod (19) is hinged to the arc plate (18), and the other end is hinged to the outer wall of the die head (13).

3. A hot melt extruder for waterproof and antistatic composite cover tape according to claim 2, characterized in that: One end of the arc-shaped plate (18) away from the die head (13) is rotatably connected to a roller (181).

4. A hot melt extruder for waterproof and antistatic composite cover tape according to claim 3, characterized in that: A cavity (182) is provided inside the rotating roller (181); the rotating roller (181) and the arc-shaped plate (18) are both made of PTFE material.

5. A hot melt extrusion process for a waterproof and antistatic composite cover tape, which is applicable to a hot melt extruder for a waterproof and antistatic composite cover tape as claimed in claim 4, characterized in that: The steps of the process are as follows: S1: First, the servo motor (17) is controlled to drive the die head (13) to rotate through the driving gear (171) and the teeth (172), so as to adjust the inclination angle of the die head (13), and at the same time, the hydraulic push rod (161) and the electro-hydraulic push rod (19) are controlled to operate, so that the hydraulic push rod (161) adjusts the distance between the two die heads (13), and the electro-hydraulic push rod (19) adjusts the guide rod (22) and the transmission bar (21) to fit, so as to ensure that the guide rod (22), the transmission bar (21) and the transmission wheel (2) are in a stable transmission state; S2: Then, the driving motor (23) is controlled to drive the guide rod (22) to rotate, so that the guide rod (22) drives the transmission wheel (2) to rotate through the transmission bar (21), so that the transmission wheel (2) drives the screw rod (133) to push the adjustment plate (132) to slide in the T-shaped opening (131), so that the distance between the side of the T-shaped opening (131) away from the screw rod (133) and the adjustment plate (132) is the set distance; at this time, the adjustment of the die head (13) is completed; S3: Pour polyurethane or polyethylene as a raw material into the hopper of the extruder, so that the extruder melts the raw material and squeezes it into the die head (13), so that the molten raw material entering the die head (13) flows out through the T-shaped port (131), and at the same time, control the external cooling fan to deliver a cold air flow into the cooling chamber (14), so as to shape the film flowing out of the T-shaped port (131); S4: The user pulls the film flowing out of the T-shaped openings (131) of the two die heads (13), passes through between the two arc-shaped plates (18), and is stretched to the laminating roller for lamination and winding; thereby obtaining the film substrate required for the waterproof and antistatic composite cover tape; S5: Finally, the film substrate is coated with AC agent, dried in an oven, thermally laminated with an antistatic layer, cut into sheets and rolled up to obtain the desired waterproof and antistatic composite cover tape.

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