Processing equipment based on polyvinyl chloride non-woven fabric

Abstract

The invention discloses processing equipment based on polyvinyl chloride non-woven fabric, and relates to the field of processing equipment based on polyvinyl chloride non-woven fabric. The processing equipment based on the polyvinyl chloride non-woven fabric comprises a feeding unit, a positioning unit, a folding and shaping unit and a hot melting unit. According to the processing equipment based on the polyvinyl chloride non-woven fabric, the positioning unit and the folding and shaping unit are arranged between the feeding unit and the hot melting unit, so that after the flat fabric penetrates out of the feeding unit, the two sides of the flat fabric are turned upwards through the positioning unit to form a U-shaped structure; the two vertical side edges are turned towards the middle to be overlapped through the turning and shaping unit, the two side edges are subjected to hot-pressing shaping to form a flat tube shape, then the flat tube shape enters the hot melting unit to be subjected to hot-melting bonding of two joints, hot-melting bonding is carried out after pre-shaping, on one hand, the flatness of the joints is guaranteed, and on the other hand, the production efficiency is improved. And on the other hand, winding, storage and transportation are convenient after hot melting bonding.

Description

Technical Field

[0001] The present invention relates to the technical field of processing equipment based on polyvinyl chloride non-woven fabrics, and specifically relates to a processing equipment based on polyvinyl chloride non-woven fabrics. Background Art

[0002] Polyvinyl chloride non-woven fabric, also known as PVC non-woven fabric, is a non-woven fabric mainly made of polyvinyl chloride. It is mixed with plasticizers, stabilizers, fillers, etc. in a certain proportion, and then the premix is formed by mixing evenly through a high-speed mixer. Then the premix is sent into an extruder and heated to 160 - 200 °C to melt the PVC. Then, uniform fibers are extruded through the extruder, and then the fibers are woven to form a non-woven fabric. There are many types of non-woven fabrics, and the most widely used is polyvinyl chloride non-woven fabric. Then the fabric is cut according to the required size to form a whole roll of long strip fabric. Then, the two sides of the fabric are wound around to form a tube and then joined and fixed to form the corresponding filter consumables.

[0003] There are two traditional joining and fixing methods. One is to sew and fix with a thread. The advantage is high strength, but the disadvantage is that there are needle holes and it is easy to leak during use. The other method is hot melt adhesion. After overlapping the two joints through the processing equipment based on polyvinyl chloride non-woven fabrics, hot pressing and melting are carried out to bond the two together to achieve fixation.

[0004] However, in the current industry situation, when hot melt adhesion is carried out through the processing equipment based on polyvinyl chloride non-woven fabrics, the polyvinyl chloride non-woven fabric is wound around into a tube shape through a positioning mold, and then the two joints are bonded. After the joints are completed, the round tube is edge-pressed to facilitate storage and transportation. However, during actual processing, since the polyvinyl chloride non-woven fabric is wound into a tube shape for joining, there are no auxiliary linings on both the inner and outer sides of the polyvinyl chloride non-woven fabric at this time. If the overall pipe diameter is relatively large, the upper half of the tube is likely to collapse downward, resulting in inaccurate joints. So, the non-overlapping part of the two joints during the hot pressing forming process is always a constant number, resulting in different widths of the joints. The dust removal bag formed after joining is skewed, and the skewed joints are also prone to folding, resulting in incomplete hot pressing and leakage problems during subsequent use. Therefore, a processing equipment based on polyvinyl chloride non-woven fabrics is specifically provided to solve the above problems. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a processing device based on polyvinyl chloride non-woven fabric, which solves the problem that when the existing polyvinyl chloride non-woven fabric is used for hot-melt bonding of dust removal bags, if the overall pipe diameter is large, the upper half of the tube is prone to collapse downward, resulting in inaccurate joints, so that the non-coincident part of the two joints during the hot pressing process is always a constant number, resulting in different widths of the joints, the dust removal bag formed after the joints is skewed, and the skewed joints are also prone to folding, resulting in incomplete hot pressing and leakage during subsequent use.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A processing device based on polyvinyl chloride non-woven fabric, comprising a feeding unit, a positioning unit, a folding and shaping unit, and a hot-melt unit;

[0007] Preferably, the feeding unit includes a feeding rack, a material support roller, a lifting roller, and a positioning pressure roller. The material support roller is installed in the feeding rack; the lifting roller is rotatably arranged at the inner top of the feeding rack; the positioning pressure roller is rotatably arranged at the front side of the feeding rack.

[0008] Preferably, the positioning unit includes a positioning support frame, an opening-gradual change frame, a feeding guide plate, a U-shaped positioning frame, a positioning mechanism, and a positioning clamp. A positioning mechanism is arranged inside the U-shaped positioning frame. The positioning mechanism extrudes and fits the polyvinyl chloride non-woven fabric to the inner wall of the U-shaped positioning frame, causing the two sides of the polyvinyl chloride non-woven fabric to fold upward.

[0009] The positioning support frame is fixedly arranged in front of the positioning pressure roller; the U-shaped positioning frame is fixedly arranged on the top of the positioning support frame; the opening-gradual change frame is fixedly arranged at one end of the U-shaped positioning frame for guiding the polyvinyl chloride non-woven fabric to transfer from the positioning pressure roller to the U-shaped positioning frame; the feeding guide plate is integrally formed on the inner side of one end of the opening-gradual change frame close to the U-shaped positioning frame, and a feeding gap is formed between the feeding guide plate and the opening-gradual change frame; the positioning clamps are installed on both sides of the U-shaped positioning frame for keeping the two joint edges of the polyvinyl chloride non-woven fabric in contact with the side walls of the U-shaped positioning frame.

[0010] Preferably, the positioning mechanism includes an N-shaped frame, a guide rail, a lifting cylinder, a suspension arm, a flattening roller, a positioning support rod, and a positioning pressure wheel. The N-shaped frame is horizontally arranged across the top of the end of the U-shaped positioning frame; the guide rails are fixedly arranged on both sides of the outer wall of the U-shaped positioning frame; the lifting cylinders are fixedly arranged on both sides of the outer wall of the U-shaped positioning frame; and the lifting cylinders push the N-shaped frame to slide up and down along the guide rails; the suspension arm is fixedly arranged at the bottom of the N-shaped frame; the flattening roller is rotatably arranged at the bottom of the suspension arm; the positioning support rods are movably hinged to both sides of the suspension arm; the positioning pressure wheels are rotatably arranged at the bottom ends of the positioning support rods, and the positioning pressure wheels roll the polyvinyl chloride non-woven fabric into the two bottom corners of the N-shaped frame.

[0011] More specifically, one end of the opening and gradient frame close to the positioning pressure roller is in an open shape, and one end of the opening and gradient frame close to the U-shaped positioning frame is in a constricted shape; the outer side of the positioning clip is fixedly installed on the outer wall of the U-shaped positioning frame, the inner side of the positioning clip is in a "6" shape, and a material feeding gap is formed between the positioning clip and the U-shaped positioning frame.

[0012] Preferably, the folding and shaping unit includes a folding support frame, a shaping carrier plate, a folding cover plate, electric heating rollers and a shaping auxiliary member. The folding cover plates are rotatably arranged on both sides of the shaping carrier plate. Electric heating rollers are arranged in the middle of both sides of the shaping carrier plate. After the polyvinyl chloride non-woven fabric is folded and positioned by the folding cover plates, hot pressing and forming are carried out through the electric heating rollers. The shaping carrier plate is fixedly arranged on the top of the folding support frame. The shaping auxiliary member is arranged at one end of the folding support frame and extends into the shaping carrier plate for folding and positioning the polyvinyl chloride non-woven fabric.

[0013] Preferably, the shaping auxiliary member includes two groups of support blocks, sliding columns, a rotating shaft, a positioning block, a positioning pressure plate and two groups of positioning grooves.

[0014] The two groups of support blocks are respectively fixedly arranged on the tops of both sides of the folding support frame; the sliding columns are movably inserted into the support blocks; the rotating shaft is rotatably arranged between the two groups of sliding columns; the positioning block is fixedly arranged in the middle of the rotating shaft; the positioning pressure plate is fixedly arranged at the bottom end of the positioning block and the positioning pressure plate is movably inserted into the shaping carrier plate. The two groups of positioning grooves are respectively penetrated and opened on both sides of the outer wall of the positioning block, and the opposite sides of the two groups of positioning grooves are vertically overlapped for positioning the two joint edges of the polyvinyl chloride non-woven fabric.

[0015] Preferably, the hot melting unit includes a hot melting support frame, a roller pressing and clamping member, a portal support frame, a hot melting bonding member, two groups of feeding pinch rollers and a cooling fan. A hot melting bonding member is arranged between two groups of symmetrically arranged roller pressing and clamping members. The two sides of the folded and formed polyvinyl chloride non-woven fabric are clamped by the two groups of roller pressing and clamping members and pushed towards the middle, so that the two joint edges of the polyvinyl chloride non-woven fabric are overlapped and the joints are hot melt bonded by the hot melting bonding member to form a seamless dust removal filter bag.

[0016] Preferably, the two groups of roller pressing and clamping members are arranged on both sides of the hot melting support frame; the portal support frame is fixedly arranged on the top of the hot melting support frame, and the hot melting bonding member is suspended and fixed at the bottom of the portal support frame; the two groups of feeding pinch rollers are rotatably arranged at the end of the hot melting support frame, and the two feeding pinch rollers are arranged in a vertically staggered manner; the cooling fan is fixedly arranged on the hot melting support frame and is located between the two groups of feeding pinch rollers.

[0017] Preferably, the roll pressing and clamping member includes a roll pressing and clamping seat, a clamping roller, a support shaft, a positioning spring, and a positioning insertion arm. The clamping roller is rotatably arranged inside one side of the roll pressing and clamping seat; the support shaft is fixedly arranged on the other side of the roll pressing and clamping seat, and the end of the support shaft is installed on the hot melting bracket; the positioning spring is movably sleeved outside the support shaft, and the two ends of the positioning spring are respectively abutted against the hot melting bracket and the roll pressing and clamping seat; the positioning insertion arm is fixedly arranged between two groups of support shafts, and the positioning insertion arm is movably inserted into the roll pressing and clamping seat.

[0018] Preferably, the hot melting and bonding member includes a bonding carrier plate, two groups of fitting grooves, a pressing groove, a pressing and heating roller, an electric heating bottom plate, a heat insulation plate, and a guiding inclined notch. The bonding carrier plate is fixedly arranged at the bottom of the portal bracket; the two groups of fitting grooves are opened on both sides of the front end of the bonding carrier plate, and the opposite ends of the two groups of fitting grooves are vertically displaced and overlapped, and guiding inclined notches are opened at the opposite ends of the two groups of fitting grooves; the pressing groove is opened at the end of the bonding carrier plate; the pressing and heating roller is rotatably arranged on the top of the pressing groove; the electric heating bottom plate is fixedly arranged at the inner bottom of the pressing groove; the heat insulation plate is fixedly arranged below the pressing groove.

[0019] The present invention discloses a processing device based on polyvinyl chloride non-woven fabric, and the beneficial effects thereof are as follows:

[0020] 1. For the processing device based on polyvinyl chloride non-woven fabric, by arranging a positioning unit and a folding and shaping unit between the feeding unit and the hot melting unit, after the flat fabric passes through the feeding unit, the two sides of the fabric are turned upwards by the positioning unit to form a U-shaped structure, and then the two vertical side edges are turned towards the middle and overlapped by the folding and shaping unit, and the two side edges are hot-pressed and shaped to form a flat tubular shape, and then enter the hot melting unit for hot melting and bonding of two seams. By pre-shaping and then performing hot melting and bonding, on the one hand, the flatness of the seams is ensured, and on the other hand, it is convenient for winding, storage and transportation after hot melting and bonding.

[0021] 2. For the processing device based on polyvinyl chloride non-woven fabric, when the fabric enters the hot melting bracket, the two flattened side edges of the fabric enter the roll pressing and clamping seat. The side edges are continuously clamped and positioned by the clamping roller, and at the same time, the two sides of the fabric are pushed towards the middle by the positioning spring, so that the two sides of the fabric are squeezed towards the middle. At this time, the two seams of the fabric enter the fitting grooves through the guiding inclined notches. Under the action of the positioning spring, the two seam edges of the fabric can be kept close to the inner wall of the fitting grooves, so as to further ensure that the seams are completely flush. At the same time, the bottom surface of the fabric bulges downwards and passes through the bottom of the bonding carrier plate, avoiding the bottom of the fabric from being burned.

[0022] 3. For the processing equipment based on polyvinyl chloride non-woven fabric, the fabric is threaded through the front-end opening and gradually changing frame, and positioned through the feeding guide plate at the end of the opening and gradually changing frame, so that both sides of the flat fabric gradually bend towards the middle to form a U shape and enter the U-shaped positioning frame. At this time, both sides of the fabric pass through the positioning clips, the bottom of the fabric is flattened and roll-pressed by the flattening roller, and both sides of the bottom of the fabric are roll-pressed by the positioning pressure wheels, so that the heights of both sides of the fabric are flush, and at the same time, side shift and material jamming are avoided during the folding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the feeding unit structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the positioning unit structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the positioning mechanism structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the folding and shaping unit structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the outer surface structure of the shaping carrier plate of the present invention;

[0030] Figure 7 It is a schematic diagram of the shaping auxiliary part of the present invention;

[0031] Figure 8 It is a schematic diagram of the hot-melt unit structure of the present invention;

[0032] Figure 9 It is a schematic diagram of the roll-pressing and clamping part of the present invention;

[0033] Figure 10 It is a schematic diagram of the hot-melt bonding part of the present invention;

[0034] Figure 11 It is a cross-sectional view of the internal structure of the bonding carrier plate of the present invention;

[0035] Figure 12 It is a schematic diagram of the end face structure of the fitting groove of the present invention.

[0036] In the figure: 1. Loading unit; 11. Loading rack; 12. Material support roller; 13. Lifting roller; 14. Positioning pressure roller; 2. Positioning unit; 21. Positioning support frame; 22. Opening gradient frame; 23. Feeding guide plate; 24. U-shaped positioning frame; 25. Positioning mechanism; 251. N-shaped frame; 252. Guide rail; 253. Lifting cylinder; 254. Suspension arm; 255. Flattening roller; 256. Positioning support rod; 257. Positioning pressure wheel; 26. Positioning clamp; 3. Folding and shaping unit; 31. Folding support frame; 32. Shaping carrier plate; 33. Folding cover plate; 34. Electric heating roller; 35. Shaping auxiliary part; 351. Support block; 352. Sliding column; 353. Rotating shaft; 354. Positioning block; 355. Positioning pressure plate; 356. Positioning groove; 4. Hot melting unit; 41. Hot melting support; 42. Roller pressing clamping part; 421. Roller pressing clamping seat; 422. Clamping pressure roller; 423. Support shaft; 424. Positioning spring; 425. Positioning insertion arm; 43. Portal frame; 44. Hot melting bonding part; 441. Bonding carrier plate; 442. Fitting groove; 443. Pressing groove; 444. Pressing electric heating roller; 445. Electric heating bottom plate; 446. Heat insulation plate; 447. Guide inclined notch; 45. Unloading clamping roller; 46. Cooling fan. Detailed implementation mode

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] By providing a processing device based on polyvinyl chloride non-woven fabric in the embodiments of the present application, the problems in the prior art are solved. When making a dust removal bag by hot melting and bonding polyvinyl chloride non-woven fabric, if the overall pipe diameter is relatively large, the upper part of the tube is likely to collapse downward, resulting in inaccurate joints. As a result, the non-coincident part of the two joints during the hot pressing forming process is always a constant quantity, leading to different widths of the joints. The dust removal bag formed after the joints has a skew, and the skewed joints are also prone to folding, resulting in incomplete hot pressing and leakage during subsequent use.

[0039] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation modes.

[0040] The embodiments of the present invention disclose a processing device based on polyvinyl chloride non-woven fabric.

[0041] According to the attached Figures 1-12As shown in the figure, it includes a feeding unit 1, a positioning unit 2, a folding and shaping unit 3, and a hot melt unit 4;

[0042] The feeding unit 1 includes a feeding rack 11, a material support roller 12, a lifting roller 13, and a positioning pressure roller 14. The material support roller 12 is installed in the feeding rack 11; the lifting roller 13 is rotatably arranged at the inner top of the feeding rack 11; the positioning pressure roller 14 is rotatably arranged at the front side of the feeding rack 11.

[0043] The positioning unit 2 includes a positioning support frame 21, an opening gradient frame 22, a feeding guide plate 23, a U-shaped positioning frame 24, a positioning mechanism 25, and a positioning clamp 26. A positioning mechanism 25 is arranged inside the U-shaped positioning frame 24. The positioning mechanism 25 extrudes and fits the polyvinyl chloride non-woven fabric against the inner wall of the U-shaped positioning frame 24, causing the two sides of the polyvinyl chloride non-woven fabric to fold upwards.

[0044] The positioning support frame 21 is fixedly arranged at the front side of the positioning pressure roller 14; the U-shaped positioning frame 24 is fixedly arranged at the top of the positioning support frame 21; the opening gradient frame 22 is fixedly arranged at one end of the U-shaped positioning frame 24 for guiding the polyvinyl chloride non-woven fabric to be transferred from the positioning pressure roller 14 into the U-shaped positioning frame 24; the feeding guide plate 23 is integrally formed on the inner side of one end of the opening gradient frame 22 close to the U-shaped positioning frame 24, and a feeding gap is formed between the feeding guide plate 23 and the opening gradient frame 22; the positioning clamps 26 are installed on both sides of the U-shaped positioning frame 24 for keeping the two joint edges of the polyvinyl chloride non-woven fabric in contact with the side walls of the U-shaped positioning frame 24.

[0045] The positioning mechanism 25 includes an N-shaped frame 251, a guide rail 252, a lifting cylinder 253, a suspension arm 254, a flattening roller 255, a positioning support rod 256, and a positioning pressure wheel 257. The N-shaped frame 251 is horizontally arranged across the top of the end of the U-shaped positioning frame 24; the guide rail 252 is fixedly arranged on both sides of the outer wall of the U-shaped positioning frame 24; the lifting cylinder 253 is fixedly arranged on both sides of the outer wall of the U-shaped positioning frame 24; and the lifting cylinder 253 pushes the N-shaped frame 251 to slide up and down along the guide rail 252; the suspension arm 254 is fixedly arranged at the bottom of the N-shaped frame 251; the flattening roller 255 is rotatably arranged at the bottom of the suspension arm 254; the positioning support rods 256 are movably hinged on both sides of the suspension arm 254; the positioning pressure wheels 257 are rotatably arranged at the bottom ends of the positioning support rods 256, and the positioning pressure wheels 257 roll the polyvinyl chloride non-woven fabric into the corners on both sides of the bottom of the N-shaped frame 251.

[0046] More specifically, one end of the opening gradient frame 22 close to the positioning pressure roller 14 is in an open shape, and one end of the opening gradient frame 22 close to the U-shaped positioning frame 24 is in a constricted shape; the outer side of the positioning clamp 26 is fixedly installed with the outer wall of the U-shaped positioning frame 24, the inner side of the positioning clamp 26 is in a "6" shape, and a material passing gap is formed between the positioning clamp 26 and the U-shaped positioning frame 24. Through the two groups of material passing gaps, the heights of both sides of the fabric are made level, and at the same time, natural drooping towards the middle is avoided.

[0047] The folding and shaping unit 3 includes a folding support frame 31, a shaping carrier plate 32, a folding cover plate 33, electric heating rollers 34 and a shaping auxiliary part 35. The folding cover plate 33 is rotatably arranged on both sides of the shaping carrier plate 32. Electric heating rollers 34 are arranged in the middle of both sides of the shaping carrier plate 32. After the polyvinyl chloride non-woven fabric is folded and positioned by the folding cover plate 33, it is hot-pressed and formed by the electric heating rollers 34. The shaping carrier plate 32 is fixedly arranged on the top of the folding support frame 31. The shaping auxiliary part 35 is arranged at one end of the folding support frame 31 and extends into the shaping carrier plate 32 for folding and positioning the polyvinyl chloride non-woven fabric.

[0048] The shaping auxiliary part 35 includes two groups of support blocks 351, sliding columns 352, a rotating shaft 353, positioning blocks 354, positioning pressing plates 355 and two groups of positioning grooves 356.

[0049] The two groups of support blocks 351 are respectively fixedly arranged on the tops of both sides of the folding support frame 31; the sliding columns 352 are movably inserted into the support blocks 351; the rotating shaft 353 is rotatably arranged between the two groups of sliding columns 352; the positioning blocks 354 are fixedly arranged in the middle of the rotating shaft 353; the positioning pressing plates 355 are fixedly arranged at the bottom ends of the positioning blocks 354, and the positioning pressing plates 355 are movably inserted into the shaping carrier plate 32. The two groups of positioning grooves 356 are respectively penetrated and opened on both outer sides of the positioning blocks 354, and the opposite sides of the two groups of positioning grooves 356 are vertically overlapped for positioning the two joint edges of the polyvinyl chloride non-woven fabric.

[0050] The hot melting unit 4 includes a hot melting support frame 41, roller pressing clamping parts 42, a portal support frame 43, a hot melting bonding part 44, two groups of feeding pinch rollers 45 and a cooling fan 46. A hot melting bonding part 44 is arranged between the two groups of symmetrically arranged roller pressing clamping parts 42. The two sides of the folded and formed polyvinyl chloride non-woven fabric are clamped by the two groups of roller pressing clamping parts 42 and pushed towards the middle, so that the two joint edges of the polyvinyl chloride non-woven fabric are overlapped and the joints are hot-melted and bonded by the hot melting bonding part 44 to form a seamless dust removal filter bag.

[0051] The two groups of roller pressing clamping parts 42 are arranged on both sides of the hot melting support frame 41; the portal support frame 43 is fixedly arranged on the top of the hot melting support frame 41, and the hot melting bonding part 44 is suspended and fixed at the bottom of the portal support frame 43; the two groups of feeding pinch rollers 45 are rotatably arranged at the end of the hot melting support frame 41, and the two feeding pinch rollers 45 are arranged in a vertically staggered manner; the cooling fan 46 is fixedly arranged on the hot melting support frame 41 and is located between the two groups of feeding pinch rollers 45.

[0052] The roll clamping member 42 includes a roll clamping seat 421, a clamping roll 422, a support shaft 423, a positioning spring 424 and a positioning insertion arm 425. The clamping roll 422 is rotatably arranged inside one side of the roll clamping seat 421; the support shaft 423 is fixedly arranged on the other side of the roll clamping seat 421, and the end of the support shaft 423 is installed on the hot melt bracket 41; the positioning spring 424 is movably sleeved outside the support shaft 423, and the two ends of the positioning spring 424 are respectively abutted against the hot melt bracket 41 and the roll clamping seat 421; the positioning insertion arm 425 is fixedly arranged between the two groups of support shafts 423, and the positioning insertion arm 425 is movably inserted into the roll clamping seat 421.

[0053] The hot melt bonding member 44 includes a bonding carrier plate 441, two groups of fitting grooves 442, a pressing groove 443, a pressing electric roller 444, an electric heating bottom plate 445, a heat insulation plate 446 and a guiding inclined notch 447. The bonding carrier plate 441 is fixedly arranged at the bottom of the portal bracket 43; the two groups of fitting grooves 442 are opened on both sides of the front end of the bonding carrier plate 441, and the opposite ends of the two groups of fitting grooves 442 are vertically offset and overlapped, and guiding inclined notches 447 are opened at the opposite ends of the two groups of fitting grooves 442; the pressing groove 443 is opened at the end of the bonding carrier plate 441; the pressing electric roller 444 is rotatably arranged on the top of the pressing groove 443; the electric heating bottom plate 445 is fixedly arranged at the inner bottom of the pressing groove 443; the heat insulation plate 446 is fixedly arranged below the pressing groove 443.

[0054] Working principle: In the raw material processing stage, polyvinyl chloride is mixed with plasticizers, stabilizers, fillers, etc. in a certain proportion, and then uniformly mixed by a high-speed mixer to form a premix. Then the premix is sent into an extruder and heated to 160 - 200 °C to melt the PVC. Then uniform fibers are extruded through the extruder, and then the fibers are woven to form polyvinyl chloride non-woven fabric. The polyvinyl chloride non-woven fabric is wound by a roll to form a whole roll of non-woven fabric blank, waiting for subsequent processing;

[0055] Then, the whole roll of polyvinyl chloride non-woven fabric is placed on the outer surface of the material support roller 12. Then the front end of the fabric passes through the top of the lifting roller 13 and then through between the two groups of positioning rollers 14. At this time, the fabric is inserted into the opening gradient frame 22 from the front end, and positioned through the feeding guide plate 23 at the end of the opening gradient frame 22, so that both sides of the flat fabric gradually bend towards the middle to form a U shape and enter the U-shaped positioning frame 24. At this time, both sides of the fabric pass through the positioning clip 26, the bottom of the fabric is flattened and roll-pressed by the flattening roller 255, and both sides of the bottom of the fabric are roll-pressed by the positioning pressure wheels 257, so that the heights of both sides of the fabric are flush;

[0056] Then the fabric passes backward through the positioning grooves 356 on both sides of the positioning block 354. At this time, the bottom of the fabric is squeezed by the positioning pressing plate 355, so that both sides of the fabric are turned and folded towards the middle and covered above the bottom surface of the fabric. Then the tops of both sides of the fabric are pressed and combined by two groups of folding cover plates 33, and the pressed fabric passes through the electric heating rollers 34. The two sides of the fabric are hot-pressed and shaped by the electric heating rollers 34, and finally the fabric is folded into a flat ring tube shape, and the two seams coincide. The hot-pressing and shaping ensures that the seams are flush;

[0057] Then the fabric continues to move backward into the hot-melt bracket 41. At this time, the two flattened side edges of the fabric enter the roller pressing and clamping seat 421, and the side edges are continuously clamped and positioned by the clamping pressure roller 422. At the same time, the two sides of the fabric are pushed towards the middle by the positioning spring 424, so that the two sides of the fabric are squeezed towards the middle. At this time, the two seams of the fabric enter the fitting groove 442 through the guiding inclined cut 447. Under the action of the positioning spring 424, the two seam edges of the fabric can be kept close to the inner wall of the fitting groove 442, so as to ensure that the seams are completely flush. At the same time, the bottom surface of the fabric bulges downward and passes through the bottom of the bonding carrier plate 441. At this time, the fabric moves forward and is cooperatively roll-pressed by the pressing electric heating roller 444 and the electric heating bottom plate 445. Finally, the two seams of the fabric are hot-pressed and bonded while ensuring flatness, so as to form a tubular structure. Then the tubular fabric moves backward to the rear end and passes outwards between the two groups of blanking pinch rollers 45 above, and then downward, passing outwards from the two groups of blanking pinch rollers 45 below from the inside to the outside. At this time, the cooling fan 46 blows air to cool the seam, so as to realize the complete hot-melt bonding and forming of the polyvinyl chloride non-woven fabric to make the dust bag.

[0058] 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. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing equipment based on polyvinyl chloride non-woven fabric, characterized in that, include; Feeding unit (1); A positioning unit (2), comprising a U-shaped positioning frame (24), wherein a positioning mechanism (25) is arranged inside the U-shaped positioning frame (24), and wherein the positioning mechanism (25) presses the polyvinyl chloride non-woven fabric to fit the inner wall of the U-shaped positioning frame (24) so ​​that both sides of the polyvinyl chloride non-woven fabric are folded upwards; A folding and shaping unit (3) comprises a shaping carrier plate (32) and folding cover plates (33) rotatably arranged on both sides of the shaping carrier plate (32), wherein electric heating rollers (34) are arranged in the middle of both sides of the shaping carrier plate (32), and the polyvinyl chloride non-woven fabric is folded and positioned by the folding cover plates (33) and then hot-pressed and shaped by the electric heating rollers (34); The hot melt unit (4) comprises two groups of symmetrically arranged rolling clamps (42) and a hot melt adhesive (44) arranged between the two groups of rolling clamps (42). The two groups of rolling clamps (42) clamp the two sides of the folded polyvinyl chloride non-woven fabric and push them toward the middle, so that the two seam edges of the polyvinyl chloride non-woven fabric overlap and the seams are hot-melt-bonded by the hot melt adhesive (44) to form a seamless dust removal filter bag.

2. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 1, characterized in that: The loading unit (1) comprises: Loading rack (11); A material support roller (12), which is installed in the loading rack (11); A lifting roller (13) is rotatably arranged at the top of the loading frame (11); A positioning pressure roller (14) is rotatably arranged on the front side of the loading rack (11).

3. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 1, characterized in that: The positioning unit (2) also includes: A positioning support frame (21) fixedly arranged on the front side of the positioning pressure roller (14); The U-shaped positioning frame (24) is fixedly arranged on the top of the positioning support frame (21); An opening gradient frame (22) is fixedly arranged at one end of the U-shaped positioning frame (24) and is used to guide the polyvinyl chloride non-woven fabric to transfer from the positioning pressure roller (14) to the U-shaped positioning frame (24); A feed guide plate (23) is integrally formed on the inner side of one end of the opening gradient frame (22) close to the U-shaped positioning frame (24), and a feed gap is formed between the feed guide plate (23) and the opening gradient frame (22); The positioning clips (26) are installed on both sides of the U-shaped positioning frame (24) and are used to keep the two seam edges of the polyvinyl chloride non-woven fabric in contact with the side walls of the U-shaped positioning frame (24).

4. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 3 is characterized in that: The positioning mechanism (25) comprises: An N-shaped frame (251) is disposed across the top of the end of the U-shaped positioning frame (24); Guide rails (252) are fixedly arranged on both sides of the outer wall of the U-shaped positioning frame (24); A lifting cylinder (253) is fixedly arranged on both sides of the outer wall of the U-shaped positioning frame (24); and the lifting cylinder (253) pushes the N-shaped frame (251) to slide up and down along the guide rail (252); A suspension arm (254) is fixedly disposed at the bottom of the N-shaped frame (251); A push roller (255) is rotatably disposed at the bottom of the suspension arm (254); A positioning support rod (256) movably hinged to both sides of the suspension arm (254); The positioning pressing wheel (257) is rotatably arranged at the bottom end of the positioning support rod (256), and the positioning pressing wheel (257) rolls the polyvinyl chloride non-woven fabric into the folded corners on both sides of the bottom of the N-shaped frame (251).

5. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 3, characterized in that: The end of the opening gradient frame (22) close to the positioning roller (14) is in an open shape, and the end of the opening gradient frame (22) close to the U-shaped positioning frame (24) is in a contracted shape; The outer side of the positioning clamp (26) is fixedly mounted to the outer wall of the U-shaped positioning frame (24), and the inner side of the positioning clamp (26) is in a "6" shape, and a material feeding gap is formed between the positioning clamp (26) and the U-shaped positioning frame (24).

6. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 1, characterized in that: The folding and shaping unit (3) further comprises: A folding support frame (31), wherein the shaping carrier plate (32) is fixedly arranged on the top of the folding support frame (31); The shaping auxiliary part (35) is arranged at one end of the folding support frame (31), and the shaping auxiliary part (35) extends into the shaping carrier plate (32) for folding and positioning the polyvinyl chloride non-woven fabric.

7. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 6, characterized in that: The shaping auxiliary component (35) comprises: Two groups of support blocks (351) are respectively fixedly arranged on the tops of both sides of the folding support frame (31); A sliding column (352) is movably inserted into the supporting block (351); A rotating shaft (353) is rotatably disposed between the two sets of sliding posts (352); A positioning block (354) fixedly disposed in the middle of the rotating shaft (353); A positioning pressing plate (355) is fixedly arranged at the bottom end of the positioning block (354), and the positioning pressing plate (355) is movably inserted into the shaping carrier plate (32); Two groups of positioning grooves (356) are respectively formed through the two sides of the outer wall of the positioning block (354), and the two groups of positioning grooves (356) are overlapped on opposite sides, so as to be used for overlapping and positioning the two seam edges of the polyvinyl chloride non-woven fabric.

8. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 1, characterized in that: The hot melt unit (4) also includes: A hot melt bracket (41), wherein the two groups of roller clamping members (42) are arranged on both sides of the hot melt bracket (41); A door-shaped bracket (43) is fixedly arranged on the top of the hot-melt bracket (41), and the hot-melt adhesive (44) is suspended and fixed on the bottom of the door-shaped bracket (43); Two sets of material unloading rollers (45) are rotatably arranged at the end of the hot melt bracket (41), and the two types of material unloading rollers (45) are arranged in an up-and-down staggered manner; The cooling fan (46) is fixedly arranged on the hot melt support (41) and is located between two sets of unloading rollers (45).

9. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 8, characterized in that: The roller clamp (42) comprises: Roller clamping seat (421); A clamping roller (422) is rotatably disposed inside one side of the roller clamping seat (421); A support shaft (423) is fixedly disposed on the other side of the roller clamping seat (421), and the end of the support shaft (423) is mounted on the hot melt bracket (41); A positioning spring (424) is movably sleeved on the outside of the support shaft (423), and two ends of the positioning spring (424) are respectively against the hot melt bracket (41) and the roller clamping seat (421); The positioning insert arm (425) is fixedly disposed between the two groups of support shafts (423), and the positioning insert arm (425) is movably inserted into the roller clamping seat (421).

10. The processing equipment based on polyvinyl chloride nonwoven fabric according to claim 8, characterized in that: The hot melt adhesive (44) comprises: An adhesive carrier plate (441) is fixedly disposed on the bottom of the door-shaped bracket (43); Two groups of fitting grooves (442) are provided on both sides of the front end of the bonding carrier plate (441), and opposite ends of the two groups of fitting grooves (442) are vertically offset and overlapped, and opposite ends of the two groups of fitting grooves (442) are provided with guiding oblique cuts (447); A pressing groove (443) is provided at the end of the bonding carrier plate (441); A pressing electric heating roller (444) is rotatably disposed on the top of the pressing groove (443); An electric heating bottom plate (445) is fixedly disposed at the bottom of the pressing groove (443); The heat insulation plate (446) is fixedly disposed below the pressing groove (443).

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