Production method of novel adhesive type macromolecular PET (Polyethylene Terephthalate) flat membrane plate

Abstract

The invention relates to the technical field of a production method of a bonding type novel high-molecular PET (Polyethylene Terephthalate) flat membrane plate, in particular to a production method of a bonding type novel high-molecular PET flat membrane plate. The extrusion mechanism comprises a discharging machine, a die head is fixedly arranged at the discharging end of the discharging machine, and a discharging opening is fixedly connected to the side, away from the discharging machine, of the die head. The inner wall of the discharging port is slidably connected with a thickness adjusting mechanism, the thickness adjusting mechanism is used for adjusting and extruding PET plates with different thicknesses, a buffering mechanism is rotationally arranged on the side, close to the die head, of the thickness adjusting mechanism, and when the thickness adjusting mechanism adjusts the extrusion thickness of the discharging port, the buffering mechanism is driven to adjust the shape of a die head runner. According to the device, the limiting plates are driven to slide in the discharging opening by manually pressing down or stretching the mounting rod, the distance between the two limiting plates is adjusted according to the thickness of the PET flat film plate extruded according to the requirement, the PET flat film plates with different thicknesses are extruded, the using effect of the device is improved, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of a production method for a novel adhesive polymer PET flat film plate, and in particular to a production method for a novel adhesive polymer PET flat film plate. Background Art

[0002] The new adhesive polymer PET flat film board is a board material extruded from polyester raw materials through an extruder at high temperature. The adhesive type usually refers to the PET flat film board with good bonding properties, which can be effectively bonded with other materials to form a stable combination. The new polymer refers to the polymer material used in the PET flat film board, which is innovative and unique in structure, composition or performance. Compared with traditional PET materials, it has been modified at the molecular level, and new functional groups, segments or comonomers have been introduced, thereby giving the material new properties, such as better mechanical properties, higher thermal stability, better chemical corrosion resistance, or special functionality.

[0003] The current PET flat film sheet extruder outlet die is usually fixedly installed at the discharge end of the extruder. When PET sheets of different thicknesses need to be extruded, different outlet dies need to be disassembled and replaced to meet the needs. This method requires the stocking of multiple outlet dies of different specifications, which increases costs;

[0004] Furthermore, when the outlet die of the extruder is replaced with an outlet die of different thickness, it is difficult to achieve a good fit between the outlet die and the extruder outlet end, resulting in the flow channel of some outlet dies being in a right-angle shape instead of a smooth curved surface. When the melt flows inside, the right-angle inner wall will cause the melt to encounter greater resistance during the flow process, which may affect the extrusion speed and stability.

[0005] In addition, after the molten material undergoes physical foaming, bubbles will be contained inside. However, when extruding a thinner flat film sheet, if the bubbles are too large, the surface of the flat film sheet will become uneven, affecting the surface flatness of the PET flat film sheet. In view of this, we propose a new adhesive polymer PET flat film sheet production method. Summary of the invention

[0006] The object of the present invention is to provide a method for producing a novel adhesive polymer PET flat film sheet to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a method for producing a novel adhesive polymer PET flat film sheet, comprising the following steps:

[0008] S1: The polyester chips of PET are foamed from particles into sheets by physical foaming, and then extruded by an extrusion mechanism;

[0009] S2: Then, the prepared middle layer film and the upper and lower surface decorative layers are placed on the upper and lower surfaces of the PET sheet coming out of the foaming port through the unwinding device, and the combined finished product is heated again by the mold temperature roller, so that the decorative layer has temperature, and the heated decorative layer and the middle molten film, as well as the PET core material still in the molten state, are pressed together by the pressure of the mold temperature roller;

[0010] S3: The product is formed into a whole and then passes through the shaping roller, followed by edge trimming, protective film application, and slitting into the length and width required by the customer to form the final product. After the pressure is released, it is placed in a designated constant temperature and humidity room for static curing;

[0011] The present invention adopts a food-grade PET physical foaming process, and can customize foaming products of different densities or with functionality (flame retardant, negative oxygen ion) according to customer needs; the surface of the material is treated with a crust to make the surface of the foamed material smooth and have a certain strength; when the PET material is not completely cooled and is still in a molten state, a layer of film is covered on the surface and a decorative layer is hot-pressed: metal sheets (such as aluminum, galvanized sheets, etc.), fireproof boards, acrylic, PET sheets, SPC, multi-layer boards, ABS, melamine paper and natural solid wood and other surfaces that do not contain harmful substances, which eliminates the use of toxic and harmful glue from the raw materials, and achieves the effect of replacing wood in whole or in part, eliminating and reducing the felling of trees. The present invention produces a new type of high-end environmentally friendly board material, which achieves food grade, zero formaldehyde, heat insulation, corrosion resistance, light weight and high strength, waterproof and moisture-proof, mildew and antibacterial, anti-aging, new recyclable and other effects.

[0012] The extrusion mechanism comprises a discharging machine, a discharging end of the discharging machine is fixedly provided with a die head, and a side of the die head away from the discharging machine is fixedly connected with a discharging port;

[0013] The inner wall of the discharge port is slidably connected with a thickness adjustment mechanism, and the thickness adjustment mechanism is used to adjust and extrude PET sheets of different thicknesses. A buffer mechanism is rotatably provided on a side of the thickness adjustment mechanism close to the die head. When the thickness adjustment mechanism adjusts the extrusion thickness of the discharge port, the buffer mechanism is driven to adjust the shape of the die head flow channel. A mixing mechanism is rotatably provided on a side of the buffer mechanism away from the thickness adjustment mechanism, so that when the thickness adjustment mechanism adjusts the thickness, the buffer mechanism cooperates to adjust the inclination angle of the mixing mechanism.

[0014] As a further improvement of the technical solution, the thickness adjustment mechanism includes a limit plate slidably connected to the inner wall of the discharge port, a mounting rod is slidably connected to the top of the discharge port, and one side of the mounting rod passes through the discharge port and is fixedly connected to one side of the limit plate;

[0015] The limiting plate is disposed at one side of the outlet end of the material discharging port and is bent to form a folded block.

[0016] As a further improvement of the technical solution, the thickness adjustment mechanism is provided in two groups, and is symmetrically arranged on the upper and lower sides inside the discharge port.

[0017] As a further improvement of the present technical solution, the buffer mechanism includes an arc-shaped plate slidably connected to the inner wall of the die head, and grooves are provided on one side of the two limit plates close to the arc-shaped plate. Fixed rods are fixedly connected in the grooves, and the fixed rods are rotatably connected to one side of the adjacent arc-shaped plate.

[0018] As a further improvement of the technical solution, the mixing mechanism includes a baffle plate rotatably connected to a side of the arc plate away from the limiting plate, and a plurality of filter holes are arranged in an array on the baffle plate.

[0019] As a further improvement of the technical solution, the upper and lower sides of the inner wall of the die head are provided with sliding grooves, the inner wall of the sliding groove is slidably connected with a slider, and the side of the slider away from the sliding groove is fixedly connected to one side of the arc plate.

[0020] As a further improvement of the technical solution, the inner wall of the die head is symmetrically provided with two arc-shaped grooves, the inner walls of the arc-shaped grooves are slidably connected with positioning blocks, and the side of the positioning blocks away from the arc-shaped grooves is fixedly connected to the baffle;

[0021] The arc-shaped groove is arranged obliquely.

[0022] As a further improvement of the present technical solution, a fixing plate is fixedly connected to one side of the discharge port close to the mounting rod, and limiting columns are slidably connected to the two fixing plates. Through holes are evenly opened on the mounting rod, and the size of the through holes is adapted to the size of the limiting columns.

[0023] As a further improvement of the technical solution, the two fixed plates are fixedly connected to a return spring on one side away from the mounting rod, and the return spring is fixedly connected to a side of the limit column close to the die head on one side away from the fixed plate.

[0024] As a further improvement of the technical solution, a partition is fixedly connected to the discharging end of the discharging machine, and the partition is fixedly connected to the die head by a plurality of bolts.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the production method of the novel adhesive polymer PET flat film plate, the installation rod is manually pressed down or stretched to drive the limit plate to slide inside the discharge port. The thickness of the PET flat film plate is extruded according to the need to adjust the distance between the two limit plates, so as to realize the extrusion of PET flat film plates of different thicknesses, thereby improving the use effect of the device and saving costs.

[0027] 2. In the production method of the novel adhesive polymer PET flat film plate, when the limit plate moves, the arc plate is pulled to move, so as to adjust the distance between the two limit plates. At the same time, the arc plate can move with the limit plate, and the connection between the die head and the limit plate is always in a curved surface, avoiding that after adjusting the thickness adjustment mechanism, the connection between the die head and the thickness adjustment mechanism is at a right angle, so that the device allows the melt to flow more smoothly inside the die head.

[0028] 3. In the production method of the novel adhesive polymer PET flat film sheet, when the arc plate moves, the baffle is pulled to move. When a thicker PET flat film sheet is extruded, the contact area between the melt and the baffle is smaller, and the bubbles have a larger growth space, so the bubbles may be larger. In addition, the melt impacts the baffle when flowing, and the flow direction of the melt changes along the inclined surface of the baffle, thereby promoting a more complete mixing of the bubbles and the melt. When a thinner PET flat film sheet is extruded, the baffle is in a vertical state, and the bubbles and the melt are filtered, so that the bubbles are smaller than those of the thicker PET flat film sheet, thereby avoiding the uneven surface of the PET flat film sheet caused by large holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0030] Figure 2 It is a three-dimensional structural diagram of the die head of the present invention;

[0031] Figure 3 It is a cross-sectional structural diagram of the die head of the present invention;

[0032] Figure 4 It is the assembly structure diagram of the thickness adjustment mechanism, the buffer mechanism and the hybrid mechanism of the present invention;

[0033] Figure 5 It is a side sectional structural diagram of the die head of the present invention;

[0034] Figure 6 This is an enlarged structural diagram of location A of the present invention;

[0035] Figure 7 It is an enlarged structural diagram of B of the present invention;

[0036] Figure 8 It is a planar structural diagram of the mixing mechanism of the present invention in an inclined state;

[0037] Fig. 9 It is a plan view of the vertical state of the mixing mechanism of the present invention.

[0038] The meaning of each number in the figure is:

[0039] 100. Discharging machine;

[0040] 200, die head; 210, discharge port; 220, thickness adjustment mechanism; 230, limit plate; 240, mounting rod; 250, folding block;

[0041] 300, buffer mechanism; 310, fixing rod; 320, arc plate; 330, slide groove; 331, slider;

[0042] 400, mixing mechanism; 410, baffle; 420, arc groove; 421, positioning block;

[0043] 500, fixed plate; 510, limit column; 511, return spring;

[0044] 600. Partition. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-Figure 9 As shown, this embodiment provides a method for producing a new type of adhesive polymer PET flat film board. The existing composite boards on the market are mainly multilayer boards, particle boards, density boards, etc. These boards are prepared by preparing fibers, applying synthetic glue, and pressing under heating and pressurization conditions. However, this type of board has the following disadvantages: the board is heavy, contains formaldehyde, benzene and other TVOC harmful gases, the highest environmental protection level is E0 or ENF, it is flammable when exposed to fire, absorbs water, and is easy to deform. In addition, trees need to be cut down during the production process, and trees are non-renewable resources, and the boards are not recyclable. In order to solve the above problems, the present invention proposes a method for producing a new type of adhesive polymer PET flat film board.

[0047] The following steps are involved:

[0048] S1: The polyester chips of PET are foamed from particles into sheets by physical foaming, and then extruded by an extrusion mechanism;

[0049] S2: Then, the prepared middle layer film and the upper and lower surface decorative layers are placed on the upper and lower surfaces of the PET sheet coming out of the foaming port through the unwinding device, and the combined finished product is heated again by the mold temperature roller, so that the decorative layer has temperature, and the heated decorative layer and the middle molten film, as well as the PET core material still in the molten state, are pressed together by the pressure of the mold temperature roller;

[0050] S3: The product is formed into a whole and then passes through the shaping roller, followed by edge trimming, protective film application, and slitting into the length and width required by the customer to form the final product. After the pressure is released, it is placed in a designated constant temperature and humidity room for static curing;

[0051] The present invention adopts a food-grade PET physical foaming process, and can customize foaming products of different densities or with functionality (flame retardant, negative oxygen ion) according to customer needs; the surface of the material is treated with a crust to make the surface of the foamed material smooth and have a certain strength; when the PET material is not completely cooled and is still in a molten state, a layer of film is covered on the surface and a decorative layer is hot-pressed: metal sheets (such as aluminum, galvanized sheets, etc.), fireproof boards, acrylic, PET sheets, SPC, multi-layer boards, ABS, melamine paper and natural solid wood and other surfaces that do not contain harmful substances, which eliminates the use of toxic and harmful glue from the raw materials, and achieves the effect of replacing wood in whole or in part, eliminating and reducing the felling of trees. The present invention produces a new type of high-end environmentally friendly board material, which achieves food grade, zero formaldehyde, heat insulation, corrosion resistance, light weight and high strength, waterproof and moisture-proof, mildew and antibacterial, anti-aging, new recyclable and other effects.

[0052] The extrusion mechanism includes a discharger 100, which includes a workbench, a feed hopper, and a twin-screw extruder. Raw materials are input into the twin-screw extruder through the feed hopper, and the raw materials are extruded through the twin-screw extruder. A die head 200 is fixedly provided at the discharge end of the discharger 100, and a discharge port 210 is fixedly connected to a side of the die head 200 away from the discharger 100. The melt extruded by the discharger 100 flows into the die head 200 and the inside of the discharger 100.

[0053] The inner wall of the discharge port 210 is slidably connected with a thickness adjustment mechanism 220, which is used to adjust and extrude PET sheets of different thicknesses, thereby improving the use effect of the device. The thickness adjustment mechanism 220 is rotatably provided with a buffer mechanism 300 on the side close to the die head 200. When the thickness adjustment mechanism 220 adjusts the extrusion thickness of the discharge port 210, the buffer mechanism 300 is driven to adjust the flow channel shape of the die head 200, so that the die head 200 and the thickness adjustment mechanism 220 are connected in a curved surface, thereby allowing the melt to flow more smoothly. The buffer mechanism 300 is rotatably provided with a mixing mechanism 400 on the side away from the thickness adjustment mechanism 220, so that when the thickness adjustment mechanism 220 adjusts the thickness, the buffer mechanism 300 is used to adjust the inclination angle of the mixing mechanism 400, so that the mixing mechanism 400 can be adjusted in cooperation with the buffer mechanism 300 according to the extrusion of melts of different thicknesses. The inclination angle of 400 makes the mixing mechanism 400 in a vertical state when a thinner PET flat film plate is extruded, and the contact area between the melt and the mixing mechanism 400 is larger, thereby filtering the bubbles and the melt, making the bubbles smaller than those of the thicker PET flat film plate, avoiding the uneven surface caused by large holes; when a thicker PET flat film plate is extruded, the contact area between the melt and the mixing mechanism 400 is smaller, the bubbles have a larger growth space, and the formed bubbles may be larger, and when the melt impacts the mixing mechanism 400, the flow direction of the melt will change along the inclined surface of the mixing mechanism 400, generating tangential and rotational flow, which can drive the bubbles to move together, making the distribution of the bubbles in the melt more dispersed, thereby enhancing the stirring effect of the bubbles and promoting a more complete mixing of the bubbles and the melt.

[0054] The present invention takes into account that the outlet die of the existing PET flat film extruder is usually fixedly installed at the discharge end of the extruder. When it is necessary to extrude and produce PET sheets of different thicknesses, it is necessary to disassemble and replace different outlet dies to meet the needs. This method requires the storage of a variety of outlet dies of different specifications, which increases the cost. Therefore, by setting a thickness adjustment mechanism 220, the thickness of the material discharged from the discharge port 210 is adjusted to achieve extrusion of PET flat film sheets of different thicknesses, thereby improving the use effect of the device and saving costs;

[0055] Considering that when the outlet die of the extruder is replaced with an outlet die of different thickness, it is difficult for the outlet die to achieve a good fit with the outlet die of the extruder, resulting in the flow channel of some outlet dies being in a right-angle shape, not a smooth curved surface shape. When the molten material flows inside, the right-angle inner wall will cause the molten material to encounter greater resistance during the flow process, which may affect the speed and stability of extrusion. Therefore, a buffer mechanism 300 is provided. When the position of the thickness adjustment mechanism 220 is adjusted, the buffer mechanism 300 can move with the thickness adjustment mechanism 220, so that the connection between the die head 200 and the thickness adjustment mechanism 220 is in a curved surface shape, avoiding that after the thickness adjustment mechanism 220 is adjusted, the connection between the die head 200 and the thickness adjustment mechanism 220 is in a right-angle shape, so that the molten material flows more smoothly;

[0056] In addition, after the melt is physically foamed, bubbles will be contained inside. However, when extruding a thinner flat film plate, if the bubbles are too large, the surface of the flat film plate will become uneven, affecting the surface flatness of the PET flat film plate. Therefore, a mixing mechanism 400 is set. When the thickness adjustment mechanism 220 is adjusted to make the outlet thickness of the discharge port 210 smaller, that is, the extruded melt is thinner, the thickness adjustment mechanism 220 moves, and pulls the buffer mechanism 300 to move toward the discharge port 210, thereby pulling the mixing mechanism 400 to move. When the outlet thickness of the discharge port 210 is smaller, the mixing mechanism 400 slowly becomes vertical during the movement, and the melt inside the die head 200 impacts the mixing mechanism 400, thereby filtering the melt and the bubbles inside it, making the bubbles smaller than those of the thicker PET flat film plate, thereby improving the surface flatness of the thinner PET flat film plate, avoiding the uneven surface caused by large holes, and improving the surface flatness of the thinner PET flat film plate.

[0057] In order to adjust the thickness of the thickness adjustment mechanism 220, it is suitable for extruding PET flat film sheets of different thicknesses, such as Figure 4 As shown, the thickness adjustment mechanism 220 includes a limit plate 230 slidably connected to the inner wall of the discharge port 210, a mounting rod 240 is slidably connected to the top of the discharge port 210, and one side of the mounting rod 240 passes through the discharge port 210 and is fixedly connected to one side of the limit plate 230;

[0058] The limiting plate 230 is bent at one side of the outlet end of the discharge port 210 to form a folding block 250 .

[0059] When in use, the two mounting rods 240 are manually moved to the inside or outside of the discharge port 210 to drive the two limit plates 230 to move, and the spacing between the two limit plates 230 is adjusted to achieve extrusion of PET flat film plates of different thicknesses, thereby improving the use effect of the device;

[0060] When not in use, the mounting rod 240 is manually pulled to move toward the inside of the discharge port 210, driving the two limit plates 230 to fit together, and the movement of the limit plates 230 drives the folding block 250 to move. When the two limit plates 230 fit together, the two folding blocks 250 can cover the discharge end of the discharge port 210 to prevent dust and other impurities in the air from entering the discharge port 210 and the die head 200 when the device is not in use. This not only prevents impurities from mixing into the next discharge, thereby ensuring that the purity and quality of the product are not contaminated, but also reduces the wear and erosion of internal components of the discharge port 210 by dust and the like, thereby extending the service life of the device.

[0061] In order to balance the pressure of the material discharged from the discharge port 210, as Figure 4 As shown, two groups of thickness adjustment mechanisms 220 are provided, and are symmetrically arranged on the upper and lower sides of the discharge port 210. The symmetrical distribution helps to balance the pressure on the upper and lower sides of the discharge port 210 when discharging material, so that the molten material flows out evenly, ensuring the flatness and consistency of the discharge material.

[0062] When the melt flows inside the die head 200 and the outlet 210, in order to ensure that the melt flows more smoothly, as shown in FIG. Figure 4-Figure 5 and Figure 8-Figure 9 As shown, the buffer mechanism 300 includes an arc plate 320 slidably connected to the inner wall of the die head 200, and grooves are provided on one side of the two limit plates 230 close to the arc plate 320, and a fixing rod 310 is fixedly connected in the groove, and the fixing rod 310 is rotatably connected to one side of the adjacent arc plate 320, and the size of the arc plate 320 located inside the groove is adapted to the size of the groove to prevent the molten material from flowing from the groove to the closed gap between the limit plate 230 and the discharge port 210, as shown by arrow c, when the limit plate 230 moves, the arc plate 320 is pulled to move, so as to adjust the position of the limit plate 230, and the arc plate 320 can move with the limit plate 230 to adjust the shape of the connection between the die head 200 and the limit plate 230, so that the molten material flows more smoothly, and avoids the right-angle connection between the die head 200 and the limit plate 230, which brings resistance and pressure to the flow of the molten material.

[0063] After physical foaming, the melt will contain bubbles inside. When extruding a thinner PET flat film sheet, if the bubbles in the melt are too large, it will affect the flatness of the PET flat film sheet surface. Figure 4 and Figure 8 and Fig. 9 As shown, the mixing mechanism 400 includes a baffle 410 rotatably connected to a side of the arc plate 320 away from the limiting plate 230, and a plurality of circular holes are arranged in an array on the baffle 410;

[0064] When the arc plate 320 moves, the baffle plate 410 is pulled to move, and the melt extruded from the discharge machine 100 flows inside the die head 200 and the discharge port 210 as shown by arrow a, impacts the baffle plate 410, and flows toward the outlet end of the discharge port 210 through the circular hole of the baffle plate 410;

[0065] When the distance between the two limiting plates 230 is large, the extruded PET flat film plate is thicker, and the limiting plate 230 moves to pull the arc plate 320 to move, thereby pulling the baffle plate 410 to move. The baffle plate 410 is in an inclined state, and the contact surface between the melt and the baffle plate 410 is small, and the bubbles have a larger growth space, and the bubbles may be larger. When the melt impacts the filter plate, the flow direction of the melt will change along the inclined surface of the filter plate, generating tangential and rotational flows. This flow mode can drive the bubbles to move together, making the distribution of the bubbles in the melt more dispersed, thereby enhancing the stirring effect of the bubbles and promoting more complete mixing of the bubbles and the melt.

[0066] When the distance between the two limiting plates 230 is small and the extruded PET flat film sheet is thinner, as shown by arrow b, the limiting plate 230 moves to pull the arc plate 320 to move, thereby pulling the baffle plate 410 to move, so that the baffle plate 410 is in a vertical state, so that the contact area between the melt and the baffle plate 410 is larger, thereby filtering the bubbles and the melt, making the bubbles smaller than those of the thicker PET flat film sheet, improving the surface flatness of the thinner PET flat film sheet, and avoiding the uneven surface caused by large holes.

[0067] Considering the guiding property of the curved plate 320 when it moves, Figure 5 and Figure 6 As shown, both upper and lower sides of the inner wall of the die head 200 are provided with a slide groove 330, and a slider 331 is slidably connected to the inner wall of the slide groove 330, and the side of the slider 331 away from the slide groove 330 is fixedly connected to one side of the arc plate 320. When the limit plate 230 moves, the arc plate 320 is pulled to move, thereby driving the slider 331 to slide inside the slide groove 330. The slide groove 330 and the slider 331 are provided to provide stability and guidance for the movement of the arc plate 320.

[0068] When the arc plate 320 moves, the baffle plate 410 is pulled to move, and the inclination angle of the baffle plate 410 is adjusted, such as Figure 5 and Figure 7-Figure 9 As shown, the inner wall of the die head 200 is symmetrically provided with two arc-shaped grooves 420, and the inner walls of the arc-shaped grooves 420 are both slidably connected with positioning blocks 421, and the side of the positioning blocks 421 away from the arc-shaped grooves 420 is fixedly connected to the baffle 410;

[0069] The arc groove 420 is arranged obliquely;

[0070] Due to the inclined setting of the arc groove 420, as shown by arrow c, when the arc plate 320 moves close to the discharge port 210, the limiting effect of the arc groove 420 enables the arc plate 320 to pull the baffle 410 to move toward the discharge port 210, as shown by arrow b, and the baffle 410 slowly becomes vertical during the movement.

[0071] Considering that it is necessary to limit and fix the mounting rod 240 after adjusting the mounting rod 240, such as Figure 5 As shown, a fixing plate 500 is fixedly connected to one side of the discharge port 210 close to the mounting rod 240, and a limiting column 510 is slidably connected to the two fixing plates 500. Through holes are evenly opened on the mounting rod 240, and the size of the through holes is adapted to the size of the limiting column 510. After the mounting rod 240 is moved, the limiting column 510 is inserted into the adjacent through hole on the mounting rod 240 to fix the mounting rod 240.

[0072] In order to ensure the stability of the mounting rod 240 after limiting the position, Figure 5 As shown, the two fixed plates 500 are fixedly connected to the side away from the mounting rod 240 with a return spring 511, and the side of the return spring 511 away from the fixed plate 500 is fixedly connected to the side of the limiting column 510 close to the die head 200. The limiting column 510 is manually pulled to pull the limiting column 510 out of the through hole of the mounting rod 240. At this time, the return spring 511 is stretched and deformed, and then the position of the mounting rod 240 is adjusted. After the adjustment is completed, the limit column 510 is manually released, and under the force of the return spring 511 to restore the deformation, the limit column 510 is driven to be clamped into the adjacent through hole of the mounting rod 240, thereby fixing the mounting rod 240.

[0073] Considering the need to disassemble the die head 200 for cleaning or overhaul, Figure 2 As shown, the discharging end of the discharging machine 100 is fixedly connected with a partition 600, and the partition 600 and the die head 200 are fixedly connected by a plurality of bolts. By removing the bolts, the die head 200 and the discharging machine 100 can be disassembled, so as to facilitate daily maintenance of the device.

[0074] Working principle: when it is necessary to produce PET flat film plates of different thicknesses, the limiting column 510 is manually pulled to pull the limiting column 510 out of the through hole of the mounting rod 240. At this time, the reset spring 511 is stretched and deformed, and then the mounting rod 240 is pressed down or stretched, and the moving mounting rod 240 drives the limiting plate 230 to slide inside the discharge port 210, and the thickness of the PET flat film plate is squeezed out as needed to adjust the distance between the two limiting plates 230. After the adjustment is completed, the limiting column 510 is manually released, and the reset spring 511 restores the deformation force, driving the limiting column 510 to snap into the adjacent through hole of the mounting rod 240, thereby fixing the mounting rod 240.

[0075] When the limiting plate 230 moves, the arc plate 320 is pulled to move, so that when the limiting plate 230 moves, the arc plate 320 can move with the limiting plate 230 to adjust the shape of the junction between the die head 200 and the limiting plate 230, so that the molten material flows more smoothly, and the resistance and pressure loss caused by the right-angle turning of the inner wall at the junction of the die head 200 and the limiting plate 230 are reduced;

[0076] When the arc plate 320 moves, the baffle plate 410 is pulled to move. Due to the inclined setting of the arc groove 420, as shown by arrow c, when the arc plate 320 moves close to the discharge port 210, the arc plate 320 cooperates with the limiting effect of the arc groove 420, so that when the arc plate 320 pulls the baffle plate 410 to move toward the discharge port 210, as shown by arrow b, the baffle plate 410 slowly becomes vertical during the movement, and the melt extruded from the discharge machine 100 flows inside the die head 200 and the discharge port 210, as shown by arrow a, and impacts the baffle plate 410.

[0077] When the distance between the two limiting plates 230 is large and the extruded PET flat film plate is thicker, the baffle plate 410 is in an inclined state, the contact surface between the melt and the baffle plate 410 is small, the bubbles have a larger growth space, and the bubbles may be larger. When the melt hits the filter plate, the flow direction of the melt will change along the inclined surface of the filter plate, generating tangential and rotational flow. This flow mode can drive the bubbles to move together, making the distribution of the bubbles in the melt more dispersed, thereby enhancing the stirring effect of the bubbles and promoting more complete mixing of the bubbles and the melt.

[0078] When the distance between the two limiting plates 230 is small and the extruded PET flat film sheet is thinner, the baffle 410 is in a vertical state, so that the contact area between the melt and the baffle 410 is larger, thereby filtering the bubbles and the melt, making the bubbles smaller than those of the thicker PET flat film sheet, improving the surface flatness of the thinner PET flat film sheet, and avoiding the uneven surface caused by large holes.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit 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 method for producing a novel adhesive polymer PET flat film sheet, characterized in that: The following steps are involved: S1: The polyester chips of PET are foamed from particles into sheets by physical foaming, and then extruded by an extrusion mechanism; S2: Then, the prepared middle layer film and the upper and lower surface decorative layers are placed on the upper and lower surfaces of the PET sheet coming out of the foaming port through the unwinding device, and the combined finished product is heated again by the mold temperature roller, so that the decorative layer has temperature, and the heated decorative layer and the middle molten film, as well as the PET core material still in the molten state, are pressed together by the pressure of the mold temperature roller; S3: The product is formed into a whole and then passes through the shaping roller, followed by edge trimming, protective film application, and slitting into the length and width required by the customer to form the final product. After the pressure is released, it is placed in a designated constant temperature and humidity room for static curing; The extrusion mechanism comprises a discharge machine (100), a discharge end of the discharge machine (100) is fixedly provided with a die head (200), and a side of the die head (200) away from the discharge machine (100) is fixedly connected with a discharge port (210); The inner wall of the material outlet (210) is slidably connected with a thickness adjustment mechanism (220), and the thickness adjustment mechanism (220) is used to adjust and extrude PET sheets of different thicknesses. A buffer mechanism (300) is rotatably provided on a side of the thickness adjustment mechanism (220) close to the die head (200). When the thickness adjustment mechanism (220) adjusts the extrusion thickness of the material outlet (210), the buffer mechanism (300) is driven to adjust the flow channel shape of the die head (200). A mixing mechanism (400) is rotatably provided on a side of the buffer mechanism (300) away from the thickness adjustment mechanism (220), so that when the thickness adjustment mechanism (220) adjusts the thickness, the buffer mechanism (300) cooperates with the buffer mechanism (300) to adjust the inclination angle of the mixing mechanism (400).

2. The method for producing the adhesive novel polymer PET flat film sheet according to claim 1, characterized in that: The thickness adjustment mechanism (220) comprises a limiting plate (230) slidably connected to the inner wall of the discharge port (210), a mounting rod (240) is slidably connected to the top of the discharge port (210), and one side of the mounting rod (240) passes through the discharge port (210) and is fixedly connected to one side of the limiting plate (230); The limiting plate (230) is disposed in a curved manner on one side of the outlet end of the material outlet (210) to form a folding block (250).

3. The method for producing the adhesive novel polymer PET flat film sheet according to claim 2, characterized in that: The thickness adjustment mechanisms (220) are provided in two groups in total and are symmetrically arranged on the upper and lower sides inside the discharge port (210).

4. The method for producing the adhesive novel polymer PET flat film sheet according to claim 2, characterized in that: The buffer mechanism (300) comprises an arc-shaped plate (320) slidably connected to the inner wall of the die head (200), and a groove is provided on one side of the two limit plates (230) close to the arc-shaped plate (320), and a fixing rod (310) is fixedly connected in each of the grooves, and the fixing rod (310) is rotatably connected to one side of the adjacent arc-shaped plate (320).

5. The method for producing the adhesive novel polymer PET flat film sheet according to claim 4, characterized in that: The mixing mechanism (400) comprises a baffle (410) rotatably connected to a side of the arc-shaped plate (320) away from the limiting plate (230), and a plurality of filter holes are arranged in an array on the baffle (410).

6. The method for producing the adhesive novel polymer PET flat film sheet according to claim 4, characterized in that: The die head (200) has a sliding groove (330) on both upper and lower sides of its inner wall, the inner wall of the sliding groove (330) is slidably connected to a slider (331), and the side of the slider (331) away from the sliding groove (330) is fixedly connected to one side of the arc plate (320).

7. The method for producing the adhesive novel polymer PET flat film sheet according to claim 5, characterized in that: The inner wall of the die head (200) is symmetrically provided with two arc-shaped grooves (420), the inner walls of the arc-shaped grooves (420) are both slidably connected with positioning blocks (421), and the side of the positioning blocks (421) away from the arc-shaped grooves (420) is fixedly connected to the baffle (410); The arc-shaped groove (420) is arranged obliquely.

8. The method for producing the adhesive novel polymer PET flat film sheet according to claim 2, characterized in that: A fixing plate (500) is fixedly connected to one side of the discharge port (210) close to the mounting rod (240), and a limiting column (510) is slidably connected to the two fixing plates (500). Through holes are evenly opened on the mounting rod (240), and the size of the through holes is compatible with the size of the limiting column (510).

9. The method for producing the novel adhesive polymer PET flat film sheet according to claim 8, characterized in that: The two fixing plates (500) are fixedly connected to a return spring (511) on one side away from the mounting rod (240), and the return spring (511) is fixedly connected to a side of the limiting column (510) close to the die head (200) on the other side away from the fixing plate (500).

10. The method for producing the novel adhesive polymer PET flat film sheet according to claim 1, characterized in that: A partition plate (600) is fixedly connected to the discharging end of the discharging machine (100), and the partition plate (600) is fixedly connected to the die head (200) via a plurality of bolts.

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