Manufacturing equipment and process of insulating hollow plate for electronic and electric appliance packaging

Abstract

The invention discloses manufacturing equipment and process of an insulating hollow plate for electronic and electric appliance packaging, and relates to the technical field of hollow plate production, the manufacturing equipment comprises a screw extruder, a hopper is arranged on the top surface of the screw extruder, a hydraulic screen exchanger is arranged at the output end of the screw extruder, and a hollow plate mold is arranged at the output end of the hydraulic screen exchanger, the hollow plate mold comprises a mold body, a dynamic flow divider is arranged on one side of the mold body, the hydraulic screen exchanger conveys molten materials to the mold body through the dynamic flow divider, and the dynamic flow divider dynamically adjusts the flow of the molten materials of the dynamic flow divider based on pressure distribution in the mold body. Through the arrangement of the dynamic flow divider, in the process that the dynamic adjusting pipe conveys the molten material to the wedge-shaped channel, the dynamic adjusting pipe can dynamically adjust the flow of the molten material entering the wedge-shaped channel according to the pressure change of the dynamic pressure channel connected with the corresponding wedge-shaped channel; the hollow plate die can extrude hollow plates with uniform thickness, and the consistency is good.

Description

Technical Field

[0001] The present invention relates to the technical field of hollow board production, and in particular to a manufacturing device and process for an insulating hollow board for electronic and electrical appliance packaging. Background Art

[0002] During the production of insulating hollow boards for electronic and electrical packaging, the die extrusion port used for insulating hollow boards is flat (usually over 2 meters wide and less than 1 centimeter thick). The viscosity of the material used in the insulating hollow boards results in a lower melt flow rate at the edge of the die cavity than in the center. This ultimately leads to uneven thickness of the insulating hollow boards and the internal support ribs, resulting in unstable overall product strength.

[0003] In the prior art, two sets of screw extruders are generally symmetrically arranged at the output end of the mold to provide molten material to the mold. However, the two sets of screw extruders can only reduce the difference in melt flow rate between the edge of the mold cavity and the center area, resulting in the overall thickness of the hollow plate and the thickness of the internal support ribs of the final product still being uneven. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a manufacturing device and process for insulating hollow boards for electronic and electrical packaging, so as to solve the problem in the prior art that the mold extrusion port used for the insulating hollow boards is flat, resulting in a lower melt flow rate at the edge of the mold cavity than in the central area, which ultimately leads to uneven thickness of the overall insulating hollow board and the thickness of the internal support ribs.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The first specific aspect is a manufacturing device for insulating hollow boards for electronic and electrical packaging, including a screw extruder with a hopper on the top surface, a hydraulic screen changer at the output end of the screw extruder, and a hollow board mold at the output end of the hydraulic screen changer, wherein the hollow board mold includes a mold body, and a dynamic diverter is provided on one side of the mold body. The hydraulic screen changer transports the molten material to the mold body through the dynamic diverter, and the dynamic diverter dynamically adjusts the flow rate of the molten material in the dynamic diverter based on the pressure distribution inside the mold body.

[0007] As a further solution of the present invention: the mold body includes an upper mold body and a lower mold body, and a wedge-shaped channel, a dynamic pressure channel and an extrusion channel are sequentially opened inside the upper mold body and the lower mold body, and the wedge-shaped channel is connected to the dynamic diverter.

[0008] As a further solution of the present invention: a pressure regulating block is provided on the inner side of the dynamic pressure channel, a first oil cylinder is provided at one end of the pressure regulating block away from the dynamic pressure channel, a second oil cylinder is provided on one side of the first oil cylinder, and the oil circuit output end of the first oil cylinder is connected to the oil circuit input end of the second oil cylinder.

[0009] As a further solution of the present invention: a movable adjustment rack is provided at the output end of the second oil cylinder, and the end of the adjustment rack away from the second oil cylinder is dynamically connected to a transmission worm.

[0010] As a further solution of the present invention: the dynamic diverter includes a docking port, the end of the docking port away from the hydraulic screen changer is connected to a diversion pipe, the output end of the diversion pipe is connected to a plurality of dynamic adjustment pipes, and the dynamic adjustment pipes correspond one-to-one to the wedge-shaped channels.

[0011] As a further solution of the present invention: the dynamic adjustment tube includes a pipeline body, an adjustment cavity is opened on the inner side of the pipeline body, a regulating valve core is arranged in the adjustment cavity, an outer ring groove is opened on the side surface of the pipeline body near the adjustment cavity, an arc-shaped piece is arranged in the outer ring groove, an adjustment gear is rotatably connected to the inner side of the outer ring groove near the outer side of the arc-shaped piece, a transmission worm gear is nested on the outer side of the outer ring groove, and the arc-shaped piece controls the position of the regulating valve core through deformation.

[0012] As a further solution of the present invention: the arc-shaped sheet includes an elastic sheet body, one end of the elastic sheet body is provided with a fixed end, the other end of the elastic sheet body is provided with a movable end, and the side of the elastic sheet body is provided with an adjustment tooth groove that fits with the adjustment gear near the adjustment gear.

[0013] As a further solution of the present invention: the inner side surface of the transmission worm wheel is provided with a built-in tooth groove, and the built-in tooth groove is engaged with the adjustment gear.

[0014] As a further solution of the present invention: the transmission worm wheel is engaged with the transmission worm.

[0015] A second specific aspect is a process for manufacturing an insulating hollow board for electronic and electrical appliance packaging, comprising the following steps:

[0016] S1: Put the material into the hopper, and the hopper evenly transports the material to the screw extruder;

[0017] S2: The screw extruder heats the material to a molten state and transports it to the hydraulic screen changer;

[0018] S3: The hydraulic screen changer conveys the molten material to the hollow plate mold, wherein the hollow plate mold includes a mold body, and a dynamic diverter is provided on one side of the mold body. The dynamic diverter dynamically adjusts the flow rate of the molten material in the dynamic diverter based on the pressure distribution inside the mold body;

[0019] S4: The hollow plate mold extrude the molten material and transport it to the vacuum shaping table, where the molten material is cooled and shaped to form a hollow plate;

[0020] S5: The hollow sheet is pulled by a first pulling machine and transported to a heat setting box. The heat setting box heat treats the hollow sheet, and the heat-treated hollow sheet is cooled by a fan;

[0021] S6: The cooled hollow sheet is pulled by a second traction machine and transported to a shearing machine, which performs electric fly-cutting and cross-cutting on the hollow sheet to form a hollow plate.

[0022] Beneficial effects of the present invention:

[0023] In the present invention, by setting up a dynamic diverter, in the process of the dynamic regulating tube conveying the molten material to the wedge-shaped channel, the dynamic regulating tube can dynamically adjust the flow rate of the molten material entering the wedge-shaped channel according to the pressure change of the dynamic pressure channel connected to the corresponding wedge-shaped channel, so that the hollow plate mold can extrude hollow plates with uniform thickness and good consistency. In addition, through the set dynamic adjustment, only one set of screw extruders and hydraulic screen changers is required, and there is no need to set up multiple sets of screw extruders and hydraulic screen changers to balance the pressure of the molten material in the hollow plate mold, thereby reducing the equipment procurement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic structural diagram of a manufacturing device for insulating hollow boards for electronic and electrical appliance packaging according to the present invention;

[0026] Figure 2 This is an axonometric view of a hollow plate mold of a manufacturing device for insulating hollow plates for electronic and electrical appliance packaging according to the present invention;

[0027] Figure 3 This is a structural schematic diagram of a hollow plate mold of a manufacturing device for insulating hollow plates for electronic and electrical appliance packaging according to the present invention;

[0028] Figure 4 It is a top view of a hollow plate mold of a manufacturing device for insulating hollow plates for electronic and electrical appliance packaging according to the present invention;

[0029] Figure 5 yes Figure 4 Cross-section at AA;

[0030] Figure 6 This is a schematic structural diagram of the first oil cylinder and the second oil cylinder in a manufacturing device for insulating hollow plates for electronic and electrical appliance packaging according to the present invention;

[0031] Figure 7This is a schematic diagram of the internal structure of a dynamic diverter in a manufacturing device for insulating hollow boards for electronic and electrical appliance packaging according to the present invention;

[0032] Figure 8 This is a schematic structural diagram of a dynamic adjustment tube in a manufacturing device for insulating hollow boards for electronic and electrical appliance packaging according to the present invention;

[0033] Figure 9 This is a schematic structural diagram of a pipe body in a manufacturing device for insulating hollow plates for electronic and electrical appliance packaging according to the present invention;

[0034] Figure 10 This is a schematic structural diagram of a device for manufacturing arc-shaped sheets in an insulating hollow board for electronic and electrical appliance packaging according to the present invention;

[0035] Figure 11 This is a schematic structural diagram of a transmission worm gear in a manufacturing device for insulating hollow boards for electronic and electrical appliance packaging according to the present invention;

[0036] Figure 12 This is a schematic diagram of the cooperation between a transmission worm wheel and a transmission worm in a manufacturing device for insulating hollow boards for electronic and electrical appliance packaging according to the present invention;

[0037] Figure 13 The present invention is a flowchart of a manufacturing process of an insulating hollow board for electronic and electrical appliance packaging.

[0038] Explanation of the accompanying symbols: 1. Hopper; 2. Screw extruder; 3. Hydraulic screen changer; 4. Hollow plate mold; 41. Mold body; 411. Upper mold body; 412. Lower mold body; 413. Wedge channel; 4131. Extrusion channel; 414. Dynamic pressure channel; 415. Pressure regulating block; 416. First oil cylinder; 4161. First piston rod; 4162. Balance spring; 417. Second oil cylinder; 4171. Second piston rod; 418. Adjustment rack; 419. Drive worm ; 42. Fixed end; 43. Dynamic diverter; 431. Docking port; 432. Diverter pipe; 433. Dynamic adjustment tube; 4331. Pipe body; 4332. Transmission worm gear; 43321. Built-in tooth groove; 4333. Adjustment chamber; 4334. Adjustment valve core; 4335. Outer ring groove; 4336. Arc-shaped sheet; 43361. Elastic sheet; 43362. Fixed end; 43363. Movable end; 43364. Adjustment tooth groove; 4337. Adjustment gear. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figures 1-10 As shown, the present invention discloses a manufacturing device for insulating hollow boards for electronic and electrical packaging, comprising a screw extruder 2, a hopper 1 being provided on the top surface thereof, the screw extruder 2 comprising a motor, an extrusion barrel, a screw and an electric heating device provided on the outside of the extrusion barrel, as shown in FIG. Figure 1 As shown, the hopper 1 is arranged on the top surface of one end of the screw extruder 2 near the motor, and the output shaft of the motor is connected to the screw through a coupling. When the motor is turned on, the power of the motor is transmitted to the screw through the output shaft, causing the screw to rotate. The rotating screw can push the material entering the screw extruder 2 (the material can be PP plastic particles or recycled waste plastic fragments) along the axial direction of the extrusion barrel, and the electric heating device arranged on the side of the extrusion barrel can electrically heat the material inside the extrusion barrel, so that the material is gradually heated to a molten state. A hydraulic screen changer 3 is provided at the output end of the screw extruder 2. The hydraulic screen changer 3 adopts a four-mesh hydraulic fast screen changer. A hollow plate mold 4 is provided at the output end of the hydraulic screen changer 3, wherein the hollow plate mold 4 includes a mold body 41, and a dynamic diverter 43 is provided on one side of the mold body 41. The hydraulic screen changer 3 transports the molten material to the mold body 41 through the dynamic diverter 43. The dynamic diverter 43 is based on the pressure inside the mold body 41. The flow rate of the molten material of the dynamic diverter 43 is dynamically adjusted according to the distribution. Since the hollow plate mold 4 extrude a flat hollow plate, the width of the hollow plate is usually 2-4 meters and the thickness is less than 1 centimeter. Therefore, during the extrusion process of the hollow plate mold 4, the two sides of the hollow plate mold 4 are far away from the hydraulic screen changer 3, resulting in a decrease in the flow rate of the material extruded by the hollow plate mold 4, thereby making the thickness of the hollow plate and the thickness of the internal support ribs uneven (usually thick in the middle and thin on both sides), reducing the quality of the hollow plate molding. The dynamic diverter 43 set up can dynamically adjust the flow rate of the molten material of the dynamic diverter 43 based on the pressure distribution inside the mold body 41, that is, when the pressure of the material at both sides of the hollow plate mold 4 drops, the flow rate of the molten material of the dynamic diverter 43 at the corresponding position is increased, so that the material is evenly distributed in the entire hollow plate mold 4, ensuring that the thickness of the hollow plate extruded by the hollow plate mold 4 and the rear end of the internal support ribs are uniform, thereby improving the quality of the hollow plate molding.

[0042] like Figure 1-Figure 5As shown, the mold body 41 includes an upper mold body 411 and a lower mold body 412. The mating surfaces of the upper mold body 411 and the lower mold body 412 are sealed and fitted together. The interiors of the upper mold body 411 and the lower mold body 412 are sequentially provided with a wedge-shaped channel 413, a dynamic pressure channel 414 and an extrusion channel 4131. The wedge-shaped channel 413 is connected to the dynamic diverter 43. Specifically, the wedge-shaped channel 413, the dynamic pressure channel 414 and the extrusion channel 4131 are distributed from the side of the upper mold body 411 (or the lower mold body 412) close to the dynamic diverter 43 to the side of the upper mold body 411 (or the lower mold body 412) away from the dynamic diverter 43. The port of the wedge-shaped channel 413 is connected to the output end of the dynamic diverter 43, ensuring that the dynamic diverter 43 can transport the molten material to the interior of the wedge-shaped channel 413. The cross-sectional area of ​​the end of the wedge-shaped channel 413 close to the dynamic pressure channel 414 gradually decreases. In this way, when the material is transported from the wedge-shaped channel 413 to the dynamic pressure channel 414, pressure compensation is performed due to the wedge effect, thereby increasing the pressure of the material entering the dynamic pressure channel 414. After the material is pressure-compensated again in the dynamic pressure channel 414, it is transported to the extrusion channel 4131, and the extrusion channel 4131 extrudes the material to form a hollow sheet.

[0043] like Figure 5 and Figure 6 As shown, a pressure regulating block 415 is provided on the inner side of the dynamic pressure channel 414, and a first oil cylinder 416 is provided on the end of the pressure regulating block 415 away from the dynamic pressure channel 414, and a second oil cylinder 417 is provided on one side of the first oil cylinder 416, and the oil circuit output end of the first oil cylinder 416 is connected to the oil circuit input end of the second oil cylinder 417, the interior of the first oil cylinder 416 is filled with hydraulic oil and a balance spring 4162 is provided, and the end of the first oil cylinder 416 close to the pressure regulating block 415 is connected to the first piston rod 4161, and the elastic force of the balance spring 4162 acts on the first piston rod 4161. When the material pressure inside the dynamic pressure channel 414 is less than the preset pressure threshold, that is, the material The pressure on the pressure regulating block 415 is reduced, so that the elastic force of the balance spring 4162 will be transmitted to the pressure regulating block 415 through the first piston rod 4161, so that the pressure regulating block 415 can squeeze the material inside the dynamic pressure channel 414, thereby increasing the pressure of the material and making the pressure of the material reach the pressure threshold again. When the balance spring 4162 drives the first piston rod 4161 to move, the hydraulic oil in the first oil cylinder 416 will increase, and the first oil cylinder 416 will suck the hydraulic oil inside the second oil cylinder 417. When the hydraulic oil inside the second oil cylinder 417 decreases, the second piston rod 4171 inserted into the inside of the second oil cylinder 417 will move toward one end of the second oil cylinder 417.

[0044] The output end of the second oil cylinder 417 is provided with a movable adjustment rack 418, and the end of the adjustment rack 418 away from the second oil cylinder 417 is power-connected to a transmission worm 419. It should be noted that the second piston rod 4171 on the second oil cylinder 417 is fixedly connected to the inner end of the adjustment rack 418. When the second piston rod 4171 moves toward one end of the second oil cylinder 417, the second piston rod 4171 will drive the adjustment rack 418 to move synchronously, causing the adjustment rack 418 to be displaced toward the side of the mold body 41.

[0045] like Figure 1 、 Figure 7-12 As shown, the dynamic diverter 43 includes a docking port 431, and the end of the docking port 431 away from the hydraulic screen changer 3 is connected to a diversion pipe 432, and the output end of the diversion pipe 432 is connected to a plurality of dynamic adjustment pipes 433, and the dynamic adjustment pipes 433 correspond to the wedge-shaped channels 413 one by one. The docking port 431 is sealed and connected to the output end of the hydraulic screen changer 3. The hydraulic screen changer 3 can transport the molten material to the docking port 431, and the docking port 431 then transports the molten material to each dynamic adjustment pipe through the diversion pipe 432. 433, each dynamic regulating tube 433 finally transports the molten material to the corresponding wedge-shaped channel 413, thereby realizing the transportation of the molten material between the hydraulic screen changer 3 and the hollow plate mold 4. In the process of the dynamic regulating tube 433 transporting the molten material to the wedge-shaped channel 413, the dynamic regulating tube 433 can dynamically adjust the flow rate of the molten material entering the wedge-shaped channel 413 according to the pressure change of the dynamic pressure channel 414 connected to the corresponding wedge-shaped channel 413, so that the hollow plate mold 4 can extrude hollow plates with uniform thickness.

[0046] like Figure 7-12As shown, the dynamic regulating tube 433 includes a pipeline body 4331, an regulating cavity 4333 is opened on the inner side of the pipeline body 4331, and a regulating valve core 4334 is provided in the regulating cavity 4333. The regulating valve core 4334 matches the regulating cavity 4333, and the regulating valve core 4334 can move radially along the pipeline body 4331 in the regulating cavity 4333. When the regulating valve core 4334 moves from outside to inside on the inner side of the regulating cavity 4333, the cross-sectional area of ​​the pipeline body 4331 for conveying molten material can be reduced, thereby reducing the flow rate of the molten material passing through the pipeline body 4331. When the regulating valve core 4334 moves from inside to outside on the inner side of the regulating cavity 4333, The cross-sectional area of ​​the pipe body 4331 for conveying the molten material is increased, thereby increasing the flow rate of the molten material passing through the pipe body 4331. An outer ring groove 4335 is provided on the side surface of the pipe body 4331 near the regulating chamber 4333. One end of the regulating chamber 4333 is communicated with the outer ring groove 4335, so that the outer end of the regulating valve core 4334 (relative to the internal space of the pipe body 4331) is exposed in the outer ring groove 4335. An arc-shaped piece 4336 is provided in the outer ring groove 4335. The inner side of the outer ring groove 4335 is rotatably connected to the outer side surface of the arc-shaped piece 4336. A transmission worm gear 4332 is nested on the outer side of the outer ring groove 4335. Figure 9 and Figure 10 As shown, the arc piece 4336 is covered on the end of the regulating valve core 4334 through the outer ring groove 4335, that is, the inner side of the arc piece 4336 is in contact with the end of the regulating valve core 4334, so the arc piece 4336 can control the position of the regulating valve core 4334 by deformation. Specifically, when the arc piece 4336 is deformed inwardly, the arc piece 4336 can squeeze the regulating valve core 4334, so that the regulating valve core 4334 moves from outside to inside inside the regulating chamber 4333, reducing The cross-sectional area of ​​the small pipe body 4331 for conveying molten material reduces the flow rate of the molten material through the pipe body 4331. When the arc-shaped piece 4336 deforms outward, the regulating valve core 4334 is subjected to the pressure of the molten material inside the pipe body 4331, causing the regulating valve core 4334 to move from the inside to the outside inside the regulating cavity 4333, thereby increasing the cross-sectional area of ​​the pipe body 4331 for conveying molten material and increasing the flow rate of the molten material through the pipe body 4331.

[0047] It should be noted that the regulating gear 4337 is installed on the inner side of the outer ring groove 4335 through the rotating shaft, and the position of the regulating gear 4337 is opposite to the position of the regulating valve core 4334.

[0048] like Figure 9 and Figure 10As shown, the arc-shaped piece 4336 includes an elastic piece 43361, one end of the elastic piece 43361 is provided with a fixed end 43362, the other end of the elastic piece 43361 is provided with a movable end 43363, and the side of the elastic piece 43361 near the adjustment gear 4337 is provided with an adjustment tooth groove 43364 that fits with the adjustment gear 4337. The elastic piece 43361 is made of metal material, and one end of the elastic piece 43361 is fixedly connected to the side surface of the pipe body 4331 through the fixed end 43362. The fixed end 4336 2 can be connected to the side surface of the pipe body 4331 by welding or rivets. The other end of the elastic sheet 43361, the movable end 43363, passes through the gap between the adjusting gear 4337 and the pipe body 4331 and has redundant length. The elastic sheet 43361 is covered on the outer end of the regulating valve core 4334 and is bent into an arc. Since the side of the elastic sheet 43361 is close to the adjusting gear 4337 and is equipped with an adjusting tooth groove 43364 that fits with the adjusting gear 4337, when the adjusting gear 4337 rotates, the adjusting gear 4337 is adjusted. The engagement of the movable end portion 43363 of the elastic sheet 43361 with the adjusting tooth groove 43364 can drive the movable end portion 43363 to move in the gap between the adjusting gear 4337 and the pipe body 4331. By controlling the rotation direction of the adjusting gear 4337, the movable end portion 43363 can be moved closer to (or away from) the adjusting gear 4337. When the movable end portion 43363 moves closer to the adjusting gear 4337, since one end of the elastic sheet 43361 is fixed by the fixed end portion 43362, the elastic sheet 43361 is fixed. The entire body 43361 will expand, that is, the elastic sheet body 43361 will be deformed outward. When the movable end 43363 moves to a position away from the adjusting gear 4337, the entire elastic sheet body 43361 will contract, that is, the elastic sheet body 43361 will be deformed inward. Therefore, the deformation direction of the elastic sheet body 43361 can be achieved by controlling the rotation direction of the adjusting gear 4337, and the deformation amount of the elastic sheet body 43361 can be controlled by controlling the number of rotations of the adjusting gear 4337, thereby indirectly controlling the flow rate of the molten material in the pipe body 4331.

[0049] like Figures 8-11 As shown, the inner side surface of the transmission worm gear 4332 is provided with a built-in tooth groove 43321, which is engaged with the adjusting gear 4337. The transmission worm gear 4332 is nested on the outer side of the outer ring groove 4335 and can rotate freely on the outer side of the outer ring groove 4335. Since the built-in tooth groove 43321 is engaged with the adjusting gear 4337, when the transmission worm gear 4332 rotates, the adjusting gear 4337 can be driven to rotate through the engagement of the built-in tooth groove 43321 with the adjusting gear 4337.

[0050] like Figure 5-Figure 12 As shown, the transmission worm wheel 4332 is engaged with the transmission worm 419. Specifically, a gear is fixedly connected to one end of the transmission worm 419, and the adjusting rack 418 is engaged with the gear at one end of the transmission worm 419, and the side of the transmission worm 419 is engaged with the outer side of the transmission worm wheel 4332. When the adjusting rack 418 moves, the adjusting rack 418 can drive the gear at one end of the transmission worm 419 to rotate, that is, drive the transmission worm 419 to rotate, and the rotating transmission worm 419 can drive the transmission worm wheel 4332 to rotate, and the rotating transmission worm wheel 4332 can drive the elastic sheet 43361 to deform through the adjusting gear 4337. Thereby, the control and regulation valve core 4334 is realized. It should be noted that the extrusion channel 4131 composed of the upper mold body 411 and the lower mold body 412 is an integrally connected channel, which can extrude a hollow sheet of a certain width (the width is determined by the overall length of the extrusion channel 4131), while the wedge-shaped channels 413 and the dynamic pressure channel 414 on the inner side of the upper mold body 411 and the lower mold body 412 are not connected to each other. Each wedge-shaped channel 413 corresponds to a dynamic regulation tube 433. The dynamic pressure channel 414 connected to each wedge channel 413 can control the corresponding dynamic regulation tube 433 through pressure changes, so as to achieve the desired effect. Figure 4 Taking the nineteen pairs of wedge-shaped channels 413 (the specific number of wedge-shaped channels 413 is adaptively set according to the specific hollow plate mold 4) as an example, those skilled in the art pre-set the cross-sectional area of ​​the molten material conveying corresponding to the dynamic regulating tube 433 of each wedge-shaped channel 413 (this is because the positions of the dynamic regulating tubes 433 are different, and the distances for conveying the molten material to the wedge-shaped channel 413 are also different. The longer the distance, the greater the resistance to the molten material, which will eventually reduce the flow rate of the molten material entering the wedge-shaped channel 413. Therefore, the cross-sectional area of ​​the molten material conveying should be set differently according to the length of the conveying distance of each dynamic regulating tube 433. The larger the cross-sectional area, the greater the flow rate of the molten material conveyed). The difference value of the cross-sectional area distribution is adaptively adjusted by those skilled in the art according to the material of the dynamic regulating tube 433, the viscosity of the molten material, and the pressure of the dynamic pressure channel 414 to ensure that the pressure of the molten material when conveyed to the dynamic pressure channel 414 through each dynamic regulating tube 433 and the wedge-shaped channel 413 is theoretically consistent;

[0051] It should also be noted that due to the transmission method between the transmission worm gear 4332 and the transmission worm 419, the transmission worm 419 can control the rotation of the transmission worm gear 4332, while the transmission worm gear 4332 cannot reversely control the rotation of the transmission worm 419. Therefore, it can be ensured that the adjustment between the dynamic pressure channel 414 and the dynamic adjustment tube 433 is one-way, and the dynamic adjustment tube 433 will not affect the material pressure inside the dynamic pressure channel 414.

[0052] By dynamically adjusting the flow of the molten material inside the dynamic regulating tube 433, the pressure in all dynamic pressure channels 414 can be made substantially consistent, ensuring that the thickness of the hollow sheet material output by the extrusion channel 4131 is uniform and consistent. In addition, through the set dynamic regulating tube 433, only one set of screw extruder 2 and hydraulic screen changer 3 is required, and there is no need to set up multiple sets of screw extruders 2 and hydraulic screen changers 3 to balance the pressure of the molten material in the hollow plate mold 4, thereby reducing the equipment procurement cost.

[0053] Example 2

[0054] like Figures 1-13 As shown, the present invention discloses a manufacturing process of an insulating hollow board for electronic and electrical appliance packaging, comprising the following steps:

[0055] The first step is mechanical feeding: the material is put into the hopper 1, and the hopper 1 evenly conveys the material to the screw extruder 2. Specifically, the material is conveyed to the hopper 1 by a screw feeder. The hopper 1 is made of stainless steel. The material entering the hopper 1 will automatically enter the screw extruder 2 under the action of gravity. It should be noted that the screw extruder 2 is composed of a motor, an extrusion barrel, a screw and an electric heater, wherein the power of the electric heater is 49-69kW, and a melt pressure sensor is provided inside the extrusion barrel to collect the pressure of the molten material in the extrusion barrel. After the material enters the extrusion barrel, the motor is turned on, and the output shaft of the motor can drive the screw to rotate. The rotating screw pushes the material in the extrusion barrel. During the advancement of the material, the electric heater provided on the outside of the extrusion barrel can heat and melt the material to form a molten state.

[0056] The second step is heating and extrusion: the screw extruder 2 heats the material to a molten state and conveys it to the hydraulic screen changer 3. The hydraulic screen changer 3 adopts a four-screen hydraulic fast screen changer to pass the molten material through the filter screen. The filter screen can filter out impurities in the molten material to ensure the purity of the molten material entering the hollow plate mold 4;

[0057] The third step is die extrusion: the hydraulic screen changer 3 conveys the molten material to the hollow plate die 4, wherein the hollow plate die 4 includes a die body 41, and a dynamic diverter 43 is provided on one side of the die body 41. The dynamic diverter 43 dynamically adjusts the flow rate of the molten material in the dynamic diverter 43 based on the pressure distribution inside the die body 41. The way in which the dynamic diverter 43 adjusts the flow rate of the molten material is exactly the same as that in Example 1, which will not be described in detail here. The dynamic diverter 43 is provided to make the pressure in all dynamic pressure channels 414 substantially consistent, thereby ensuring that the thickness of the hollow plate material output by the extrusion channel 4131 is uniform and consistent;

[0058] The fourth step is vacuum shaping: the hollow plate mold 4 extrude the molten material and convey it to the vacuum shaping table, where the molten material is cooled and shaped to form a hollow plate. The vacuum shaping table adopts the vacuum shaping table in the prior art and meets the production speed (1-6m / min) and specifications (maximum width 2200mm, thickness 2-6mm) of the hollow plate.

[0059] The fifth step is heat treatment and cold setting: the hollow sheet is pulled by the first traction machine and transported to the heat setting box. The heat setting box heat treats the hollow sheet and cools the heat-treated hollow sheet with a fan. The size of the main roller of the first traction machine is 230×2300mm. There are six groups of traction rollers, each group includes a main roller and a secondary roller. The rotation speed of the main roller and the secondary roller is consistent with the production speed of the hollow sheet (1-6m / min). The traction power of the main roller and the secondary roller adopts a three-phase asynchronous with a power of 7.5kW. The motor, a three-phase asynchronous motor, is regulated by an Inovance inverter to achieve variable frequency speed regulation. The first traction machine transports the pulled hollow sheet to the heat setting box at the set speed. The heat setting box has a heating power of 40kW and can be divided into eight temperature control zones according to the volume of the heat setting box and the specifications of the hollow sheet. The eight temperature control zones heat the hollow sheet entering the heat setting box. The heat setting box can heat and remove stress from the hollow sheet entering it. After the stress is removed, the hollow sheet is discharged from the heat setting box.

[0060] The sixth step is cutting and stacking: the cooled hollow sheet is pulled by the second traction machine and transported to the shearing machine. The shearing machine performs electric flying cutting and cross-cutting on the hollow sheet to form a hollow plate. It should be noted that a cooling air blower is provided between the heat setting box and the second traction machine. The number and position of the cooling air blower are adaptively adjusted by technical personnel in this field according to the specifications of the hollow plate to ensure that the hollow plate can be cooled to a preset temperature. The second traction machine works exactly the same as the first traction machine and will not be repeated here. The second traction machine can transport the cooled hollow sheet to the shearing machine. The shearing machine performs electric flying cutting and cross-cutting on the transported hollow sheet to form hollow plates of the same specifications (length, width and height are 2.400m×2.0m×0.002-0.006m respectively). The hollow plates can be stacked and collected.

[0061] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A manufacturing device for insulating hollow boards for electronic and electrical packaging, characterized in that: include: A screw extruder (2) having a hopper (1) provided on its top surface; A hydraulic screen changer (3) is provided at the output end of the screw extruder (2); A hollow plate mold (4) is provided at the output end of a hydraulic screen changer (3), wherein the hollow plate mold (4) includes a mold body (41), a dynamic diverter (43) is provided on one side of the mold body (41), the hydraulic screen changer (3) transports molten material to the mold body (41) through the dynamic diverter (43), and the dynamic diverter (43) dynamically adjusts the flow rate of the molten material in the dynamic diverter (43) based on the pressure distribution inside the mold body (41).

2. The manufacturing equipment of the insulating hollow board for electronic and electrical appliance packaging according to claim 1, characterized in that: The mold body (41) comprises an upper mold body (411) and a lower mold body (412), wherein a wedge-shaped channel (413), a dynamic pressure channel (414) and an extrusion channel (4131) are sequentially provided inside the upper mold body (411) and the lower mold body (412), and the wedge-shaped channel (413) is connected to the dynamic diverter (43).

3. The manufacturing equipment of the insulating hollow board for electronic and electrical appliance packaging according to claim 2, characterized in that: A pressure regulating block (415) is provided inside the dynamic pressure channel (414), a first oil cylinder (416) is provided at one end of the pressure regulating block (415) away from the dynamic pressure channel (414), a second oil cylinder (417) is provided on one side of the first oil cylinder (416), and an oil circuit output end of the first oil cylinder (416) is connected to an oil circuit input end of the second oil cylinder (417).

4. The manufacturing equipment of the insulating hollow board for electronic and electrical appliance packaging according to claim 3, characterized in that: The output end of the second oil cylinder (417) is provided with a movable adjustment rack (418), and the end of the adjustment rack (418) away from the second oil cylinder (417) is dynamically connected to a transmission worm (419).

5. The manufacturing equipment of the insulating hollow board for electronic and electrical appliance packaging according to claim 2, characterized in that: The dynamic diverter (43) includes a docking port (431), one end of the docking port (431) away from the hydraulic screen changer (3) is connected to a diversion pipe (432), and the output end of the diversion pipe (432) is connected to a plurality of dynamic adjustment pipes (433), and the dynamic adjustment pipes (433) correspond one to one with the wedge-shaped channels (413).

6. The manufacturing equipment for insulating hollow boards for electronic and electrical appliance packaging according to claim 5, characterized in that: The dynamic regulating tube (433) comprises a pipe body (4331), an regulating cavity (4333) is provided on the inner side of the pipe body (4331), a regulating valve core (4334) is provided in the regulating cavity (4333), an outer ring groove (4335) is provided on the side surface of the pipe body (4331) near the regulating cavity (4333), an arc-shaped piece (4336) is provided in the outer ring groove (4335), an regulating gear (4337) is rotatably connected to the inner side of the outer ring groove (4335) near the outer side of the arc-shaped piece (4336), a transmission worm gear (4332) is nested on the outer side of the outer ring groove (4335), and the arc-shaped piece (4336) controls the position of the regulating valve core (4334) by deformation.

7. The manufacturing equipment of the insulating hollow board for electronic and electrical appliance packaging according to claim 6, characterized in that: The arc-shaped piece (4336) includes an elastic piece (43361), one end of the elastic piece (43361) is provided with a fixed end (43362), the other end of the elastic piece (43361) is provided with a movable end (43363), and an adjustment tooth groove (43364) that matches the adjustment gear (4337) is provided on the side of the elastic piece (43361) near the adjustment gear (4337).

8. The manufacturing equipment for insulating hollow boards for electronic and electrical appliance packaging according to claim 6, characterized in that: The inner side surface of the transmission worm wheel (4332) is provided with a built-in tooth groove (43321), and the built-in tooth groove (43321) is engaged with the adjustment gear (4337).

9. The manufacturing equipment for insulating hollow boards for electronic and electrical appliance packaging according to claim 6, characterized in that: The transmission worm wheel (4332) is meshed with the transmission worm (419).

10. A process for manufacturing an insulating hollow board for electronic and electrical appliance packaging, characterized in that: The following steps are involved: S1: Put the material into the hopper (1), and the hopper (1) evenly transports the material to the screw extruder (2); S2: The screw extruder (2) heats the material to a molten state and conveys it to the hydraulic screen changer (3); S3: The hydraulic screen changer (3) transports the molten material to the hollow plate mold (4), wherein the hollow plate mold (4) includes a mold body (41), and a dynamic diverter (43) is provided on one side of the mold body (41). The dynamic diverter (43) dynamically adjusts the flow rate of the molten material in the dynamic diverter (43) based on the pressure distribution inside the mold body (41); S4: The hollow plate mold (4) extrude the molten material and transport it to the vacuum shaping table, where the molten material is cooled and shaped to form a hollow plate; S5: The hollow sheet is pulled by a first pulling machine and transported to a heat setting box. The heat setting box heat treats the hollow sheet, and the heat-treated hollow sheet is cooled by a fan; S6: The cooled hollow sheet is pulled by a second traction machine and transported to a shearing machine, which performs electric fly-cutting and cross-cutting on the hollow sheet to form a hollow plate.

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