A continuous thermoplastic unidirectional multi-layer composite sheet conveying device and method

Abstract

The present invention belongs to the technical field of composite sheet production, and specifically relates to a continuous thermoplastic unidirectional multi-layer composite sheet conveying device and method. There is a conveyor, and the conveyor includes a base, two pressure shaping group rollers, a filling fabric device, and two pressure compounding group rollers. The two pressure shaping group rollers, the filling fabric device, and the two pressure compounding group rollers are all fixedly installed above the base, and the two pressure shaping group rollers are located in front of the two pressure compounding group rollers; the filling fabric device is located behind the two pressure compounding group rollers; there are two pressure shaping group rollers, and they are arranged oppositely. The bottoms of the two pressure shaping group rollers are both connected by bearings to sliders, and the sliders are slidably connected to slide rails below. The slide rails are fixedly installed on the ground. This device solves the problems of poor forming quality, low strength, and poor fit between materials when extruding and forming composite sheets currently.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite sheet production, and particularly relates to a continuous thermoplastic unidirectional multi-layer composite sheet conveying device and method. Background Art

[0002] Continuous fiber reinforced thermoplastic composite prepreg tapes have seen great development in recent years due to their excellent mechanical properties such as high tensile strength, bending strength and modulus, outstanding high and low temperature impact properties, low density, and recyclability. The corresponding manufacturing technologies have also achieved significant breakthroughs.

[0003] During the re-forming process of existing unidirectional multi-layer composite sheets, when the sheet is extruded and compounded through a set of rollers, it is formed by the extrusion of the set of rollers. However, after the set of rollers is used for a period of time, the distance between the two rollers will become loose, or the pressure on the sheet is insufficient, resulting in poor forming quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a continuous thermoplastic unidirectional multi-layer composite sheet conveying device and method to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A continuous thermoplastic unidirectional multi-layer composite sheet conveying device and method, including a conveyor. The conveyor includes a base, two pressure shaping roller sets, a filling fabric device, and two pressure compounding roller sets. The two pressure shaping roller sets, the filling fabric device, and the two pressure compounding roller sets are all fixedly installed above the base, and the two pressure shaping roller sets are located in front of the two pressure compounding roller sets; the filling fabric device is located behind the two pressure compounding roller sets; there are two pressure shaping roller sets, which are arranged oppositely. The bottom of each of the two pressure shaping roller sets is connected by a bearing to a slider, and the slider is slidably connected to a slide rail, and the slide rail is fixedly installed on the base.

[0006] Preferably, an extrusion mechanism is provided on one side of each of the two pressure shaping roller sets. The extrusion mechanism includes an extrusion cavity, an extrusion rod, an arc-shaped block, and two groups of rollers; an extrusion part is provided inside the extrusion cavity, and the extrusion cavity is fixedly installed above the base. The extrusion rod is connected to the extrusion part, the arc-shaped block is fixedly installed at the inner end of the extrusion rod, and the two groups of rollers are respectively installed by bearings at the front and rear ends of the arc-shaped block.

[0007] Preferably, the production steps of the continuous thermoplastic unidirectional multi-layer composite sheet are as follows: Step S1, the base layer and the surface layer of the sheet meet inside the filling and cloth laying device, and the filling and cloth laying device arranges an intermediate layer between the base layer and the surface layer; Step S2, after the base layer, the surface layer and the intermediate layer meet, they are extruded by the pressure composite group rollers, and then secondarily pressed and formed by the pressure shaping group rollers; Step S3, finally, the formed composite sheet is cut and collected and unloaded to complete the production.

[0008] Preferably, the extrusion part includes an air pressure chamber, an air pressure plate, a connecting rod, a motor and a gear; the air pressure plate is slidably connected to the inner wall of the air pressure chamber, the air pressure plate is connected to the extrusion rod through the connecting rod, several tooth blocks are arranged below the connecting rod and are meshed with the gear, and the air pressure chamber is fixedly installed on the inner wall of the extrusion chamber.

[0009] Preferably, a toothed rod is meshed below the gear, a slide plate is fixedly installed at the outer end of the toothed rod, and an air chamber is fixedly installed on the inner wall of the extrusion chamber.

[0010] Preferably, the slide plate is slidably connected to the inner wall of the air chamber, the inside of the connecting rod is hollow and penetrates through both ends, a through hole is arranged in the middle of the air pressure plate and is aligned with the through hole of the connecting rod, a sliding rod is slidably connected to the inner wall of the connecting rod, the sliding rod is fixedly connected to the extrusion rod, and the outer end of the sliding rod is spring-connected to the outer side inner wall of the air pressure chamber.

[0011] Preferably, an air inlet pipe and an air outlet pipe are connected between the outer side of the air chamber and the outer side of the air pressure chamber, a pressure valve is arranged in the air inlet pipe, and a control valve is arranged in the air outlet pipe.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention greatly extrudes the materials composed of the base layer, the surface layer and the intermediate layer to improve the forming quality of the composite sheet, and the extrusion force can be adjusted by adjusting the torque of the motor. Different thicknesses of composite sheets require different extrusion forces, and the adjustment is convenient and efficient. It can cope with composite sheets of different models and thicknesses, has a wider application range, and does not need to use multiple devices, so the cost can be relatively saved; at the same time, the motor rotates in a forward and reverse alternating manner, which not only ensures the extrusion of the composite sheet to improve the forming quality, but also avoids the situation that the composite sheet cannot be transmitted out through the two pressure shaping group rollers due to long-term strong extrusion, ensuring the smooth transmission during the production process;

[0013] At the same time, the extrusion rod drives the two groups of rollers to impact the pressure shaping group rollers through the arc-shaped blocks, thereby further strengthening the forming quality of the composite sheet; the motor moves forward and reverse alternately, so that each time the two pressure shaping group rollers extrude the composite sheet, a strong impact can be carried out, so that the fit degree of the base layer, the surface layer and the intermediate layer is higher, the forming strength is increased, and the forming quality is further improved. Brief Description of the Drawings

[0014] The drawings are used to provide a further understanding of the present invention and form a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0015] Figure 1 is the structure of the conveying device in the present invention;

[0016] Figure 2 is a schematic diagram of the extrusion mechanism of the present invention;

[0017] Figure 3 is a schematic diagram of the internal structure of the extrusion cavity of the present invention;

[0018] Figure 4 is a schematic plan view of the extrusion cavity of the present invention;

[0019] Figure 5 is a schematic diagram of the internal structure of the connecting rod of the present invention;

[0020] The reference numerals are as follows: base 100; filling fabric device 500; pressure composite group rollers 600; pressure shaping group rollers 700; slider 1; slide rail 2; extrusion cavity 3; extrusion rod 31; arc block 32; roller 33; air pressure cavity 34; air pressure plate 341; connecting rod 342; motor 343; gear 344; rack 345; slide plate 346; slide rod 347; air cavity 35. Detailed Description of the Preferred Embodiments

[0021] The following provides a non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0022] Please refer to Figures 1-5 , the present invention provides a technical solution: including a conveyor, the conveyor includes a base 100, two pressure shaping group rollers 700, a filling fabric device 500 and two pressure composite group rollers 600. The two pressure shaping group rollers 700, the filling fabric device 500 and the two pressure composite group rollers 600 are all fixedly installed above the base 100, and the two pressure shaping group rollers 700 are located in front of the two pressure composite group rollers 600;

[0023] The filling fabric device 500 is located behind the two pressure composite group rollers 600;

[0024] There are two pressure shaping group rollers 700, which are arranged oppositely. Sliders 1 are connected to the bottoms of the two pressure shaping group rollers 700 by bearings. Below the sliders 1, there are sliding connections with slide rails 2, and the slide rails 2 are fixedly installed on the base 100.

[0025] On one side of each of the two pressure shaping group rollers 700, there is an extrusion mechanism. The extrusion mechanism includes an extrusion chamber 3, an extrusion rod 31, an arc-shaped block 32, and two groups of rollers 33;

[0026] An extrusion part is arranged inside the extrusion chamber 3, and the extrusion chamber 3 is fixedly installed above the base 100. The extrusion rod 31 is connected to the extrusion part. The arc-shaped block 32 is fixedly installed at the inner end of the extrusion rod 31. The two groups of rollers 33 are respectively connected to the front and rear ends of the arc-shaped block 32 by bearings.

[0027] The production steps of continuous thermoplastic unidirectional multi-layer composite sheets are as follows:

[0028] Step S1: The base layer and the surface layer of the sheet meet inside the filling and fabricating device 500, and the filling and fabricating device 500 arranges an intermediate layer between the base layer and the surface layer;

[0029] Step S2: After the base layer, the surface layer, and the intermediate layer meet, they are extruded through the pressure compounding group rollers 600, and then secondarily pressed and formed through the pressure shaping group rollers 700;

[0030] Step S3: Finally, the pressed and formed composite sheet is cut, collected, and discharged to complete the production.

[0031] The extrusion part includes a pneumatic chamber 34, a pneumatic plate 341, a connecting rod 342, a motor 343, and a gear 344;

[0032] The pneumatic plate 341 is slidably connected to the inner wall of the pneumatic chamber 34. The pneumatic plate 341 is connected to the extrusion rod 31 through the connecting rod 342. Below the connecting rod 342, there are several tooth blocks, which are meshed with the gear 344. The pneumatic chamber 34 is fixedly installed on the inner wall of the extrusion chamber 3;

[0033] When the base layer, surface layer, and intermediate layer are pressed and formed by the pressure composite group roll 600 and the pressure shaping group roll 700, the motor 343 operates to drive the gear 344 to rotate. The gear 344 drives the connecting rod 342 to move by meshing with the tooth block. The connecting rod 342 drives the air pressure plate 341 to slide along the inner wall of the air pressure chamber 34. The connecting rod 342 drives the two sets of rollers 33 to move through the extrusion rod 31 until the two sets of rollers 33 contact the surface of the pressure shaping group roll 700 and squeeze each other. The pressure shaping group roll 700 is forced to slide inward along the slide rail 2 through the slider 1. The two pressure shaping group rolls 700 approach each other and strongly squeeze the material composed of the base layer, surface layer, and intermediate layer, improving the forming quality of the composite sheet. Moreover, the extrusion force can be adjusted by adjusting the torque of the motor 343. Different thicknesses of composite sheets require different extrusion forces. The adjustment is convenient and efficient, can cope with composite sheets of different models and thicknesses, has a wider application range, does not require multiple devices, and can relatively save costs;

[0034] At the same time, the motor 343 rotates in a forward and reverse alternating manner, which not only ensures the extrusion of the composite sheet to improve the forming quality but also avoids the situation that the composite sheet cannot be transmitted out through the two pressure shaping group rolls 700 due to long-term strong extrusion, ensuring the smooth transmission during the production process.

[0035] A tooth bar 345 is meshed below the gear 344. The outer end of the tooth bar 345 is fixedly installed with a slide plate 346. The inner wall of the extrusion chamber 3 is fixedly installed with an air chamber 35.

[0036] The slide plate 346 is slidably connected to the inner wall of the air chamber 35. The inside of the connecting rod 342 is hollow and penetrates at both ends. A through hole is provided in the middle of the air pressure plate 341 and is aligned with the through hole of the connecting rod 342. A slide rod 347 is slidably connected to the inner wall of the connecting rod 342. The slide rod 347 is fixedly connected to the extrusion rod 31. The outer end of the slide rod 347 is spring-connected to the outer side inner wall of the air pressure chamber 34.

[0037] A gas inlet pipe and a gas outlet pipe are connected between the outer side of the air chamber 35 and the outer side of the air pressure chamber 34. A pressure valve is provided in the gas inlet pipe, and a control valve is provided in the gas outlet pipe.

[0038] Through the above steps, the gear 344 rotates and drives the rack 345 to move through meshing. The rack 345 drives the slide plate 346 to slide along the inner wall of the air chamber 35. The gas outside the slide plate 346 is squeezed. When both the rack 345 and the connecting rod 342 move to the limit distance, the extrusion force of the two pressure shaping group rollers 700 on the composite sheet is maximized. At this time, the pressure valve reaches the pressure bearing limit and thus opens. The gas outside the slide plate 346 quickly enters the air pressure chamber 34 through the pipeline. The gas enters the inside of the connecting rod 342 through the through holes of the air pressure plate 341. The air pressure impacts the slide rod 347. At the same time, the spring is deformed by force. After that, the control valve opens and releases the air pressure into the air chamber 35, so that the extrusion rod 31 drives the two groups of rollers 33 to impact the pressure shaping group rollers 700 through the arc-shaped block 32, thereby further enhancing the forming quality of the composite sheet;

[0039] The motor 343 reciprocates in a forward and reverse alternating manner, so that each time the two pressure shaping group rollers 700 extrude the composite sheet, a strong impact can be carried out, so that the fit degree of the base layer, the surface layer and the intermediate layer is higher, the forming strength is increased, and the forming quality is further improved.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A continuous thermoplastic unidirectional multi-layer composite sheet conveying device, comprising a conveyor, characterized in that: The conveyor comprises a base (100), two pressure-setting roller groups (700), a filling and distributing device (500) and two pressure-compound roller groups (600); the two pressure-setting roller groups (700), the filling and distributing device (500) and the two pressure-compound roller groups (600) are all fixedly mounted above the base (100), and the two pressure-setting roller groups (700) are located in front of the two pressure-compound roller groups (600); The filling material distribution device (500) is located at the rear side of the two pressure compound rollers (600); Two pressure shaping rollers (700) are provided and arranged opposite to each other. The bottoms of the two pressure shaping rollers (700) are both connected to a slider (1) by a bearing. A slide rail (2) is slidably connected below the slider (1). The slide rail (2) is fixedly mounted on a base (100). One side of the two pressure shaping rollers (700) is provided with an extrusion mechanism. The extrusion mechanism comprises an extrusion chamber (3), an extrusion rod (31), an arc block (32), and two groups of rollers (33). An extrusion portion is provided inside the extrusion chamber (3), and the extrusion chamber (3) is fixedly mounted above the base (100); the extrusion rod (31) is connected to the extrusion portion; the arc block (32) is fixedly mounted on the inner end of the extrusion rod (31); the two groups of rollers (33) are respectively mounted on the front and rear ends of the arc block (32) by bearings; and the extrusion portion comprises an air pressure chamber (34), an air pressure plate (341), a connecting rod (342), a motor (343) and a gear (344); The air pressure plate (341) is slidably connected to the inner wall of the air pressure chamber (34). The air pressure plate (341) is connected to the extrusion rod (31) via a connecting rod (342). A plurality of tooth blocks are provided below the connecting rod (342) and mesh with the gear (344). The air pressure chamber (34) is fixedly mounted on the inner wall of the extrusion chamber (3). A gear rod (345) meshes below the gear (344). A slide plate (346) is fixedly mounted on the outer end of the gear rod (345). The air chamber (35) is fixedly mounted on the inner wall of the extrusion chamber (3).

2. The continuous thermoplastic unidirectional multi-layer composite sheet conveying device according to claim 1, characterized in that: The slide plate (346) is slidably connected to the inner wall of the air cavity (35); the interior of the connecting rod (342) is hollow and penetrated at both ends; a through hole is provided in the middle of the air pressure plate (341) and is aligned with the through hole of the connecting rod (342); a slide rod (347) is slidably connected to the inner wall of the connecting rod (342); the slide rod (347) is fixedly connected to the extrusion rod (31); and the outer end of the slide rod (347) is spring-connected to the outer inner wall of the air pressure cavity (34).

3. The continuous thermoplastic unidirectional multi-layer composite sheet conveying device according to claim 2, characterized in that: An air inlet pipe and an air outlet pipe are connected between the outside of the air cavity (35) and the outside of the air pressure cavity (34), and a pressure valve is arranged in the air inlet pipe, and a control valve is arranged in the air outlet pipe.

4. A method for producing a continuous thermoplastic unidirectional multi-layer composite sheet, according to the continuous thermoplastic unidirectional multi-layer composite sheet conveying device as claimed in claim 1, characterized in that: The production steps of the continuous thermoplastic unidirectional multi-layer composite sheet are as follows: Step S1, the base layer and the surface layer of the sheet material are combined inside the filling material distribution device (500), and the filling material distribution device (500) arranges an intermediate layer between the base layer and the surface layer; Step S2, after the base layer, the surface layer and the middle layer are combined, they are extruded by a pressure composite roller group (600), and then pressed and formed for a second time by a pressure shaping roller group (700); Step S3, cutting the composite sheet after the final pressing and forming, and collecting the blanks to complete the production.

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