Grinding equipment for recycling polyurethane sponge

Abstract

The invention discloses grinding equipment for polyurethane sponge recovery in the technical field of polyurethane sponge grinding, and the grinding equipment comprises a base, an upper grinding piece and a lower grinding piece are mounted on the base, and a feeding channel is arranged between the upper grinding piece and the lower grinding piece; the lower grinding lip is inserted into the top of the side wall of the lower grinding piece; the wedge-shaped piece is arranged on the inner side wall of the lower grinding lip and can drive the lower grinding lip to radially move towards the lower grinding piece; the driving part is mounted in the base and used for driving the lower grinding lip to rotate; the positioning piece is vertically and elastically arranged in the lower grinding piece, and the top of the positioning piece extends into the upper grinding piece; the triggering piece is transversely and elastically arranged in the upper grinding piece, and the end part can extend out of the upper grinding piece; the fastener is mounted on the side wall of the upper grinding lip and used for fixing the upper grinding lip; after the upper grinding lip is assembled and disassembled, the lower grinding lip is limited and the upper grinding lip is disassembled, the lower grinding lip is quickly disassembled, so that the grinding lip is conveniently cleaned, and the equipment cleaning time is saved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of polyurethane sponge grinding technology, and particularly relates to a polyurethane sponge recycling grinding device. BACKGROUND

[0002] As a widely used material, polyurethane sponge plays an important role in many fields such as automotive interiors, furniture and packaging. With the large-scale use of polyurethane sponge products, the amount of waste generated is also increasing. Recycling and reusing the waste polyurethane sponge not only can effectively reduce the environmental pollution caused by solid waste, but also can save resources, reduce production costs and meet the strategic requirements of sustainable development.

[0003] In the recycling process of waste polyurethane sponge, the grinding step is a core step that determines the feasibility of subsequent processing. Through the mechanical action (shearing, impact and grinding) of the grinding device, the blocky and flaky waste sponge can be broken into fine powder with uniform particle size (usually 0.1-5 mm), and the sponge powder can be widely adapted to various regeneration processes: for example, mixed with new polyether and isocyanate to re-foam and prepare regenerated polyurethane foam; or as a filler to be mixed into an elastomer formula to produce polyurethane seals, shock pads and other products, realizing the cyclic conversion from waste to raw material.

[0004] In the recycling and grinding process of polyurethane sponge, there are three core problems: first, the temperature rise leads to powder agglomeration and adhesion, affecting the dispersibility. The main body of polyurethane sponge is a polyurethane polymer chain, and the glass transition temperature of soft sponge is relatively low (-50~ -30℃). The continuous production of heat caused by the severe friction between the equipment and the sponge and particles during grinding makes the temperature rise to 40-80℃. After 30℃, the polymer chain changes from the elastic stable state to the softened state, and the surface viscosity of the particles increases. If the sponge contains low molecular polyether and plasticizer, high temperature will promote the migration of these components to the surface of the particles, further increasing the viscosity. Finally, the fine powder dispersed with each other forms a tight agglomerate with a particle size of 10-20mm, which does not meet the requirements of the subsequent process for dispersibility, and also increases the difficulty of screening and mixing. Second, local adhesion and accumulation cause equipment blockage, reducing production efficiency. If there are "cooling dead angles" such as corners of the cooling system of the grinding equipment, edges of the discharge port, or insufficient flow of the water-cooled jacket, the cooling effect is insufficient. The high-temperature adhesion of the sponge powder will be attached to these areas first. With the continuous grinding, the attached powder gradually accumulates and thickens, on the one hand, it reduces the effective crushing space of the equipment, leading to insufficient crushing of the sponge, on the other hand, it blocks the discharge port, forcing the equipment to stop for cleaning. In severe cases, the powder continues to be heated (the local temperature may exceed 80℃) and hardens, increasing the difficulty of cleaning and significantly reducing the continuous production efficiency. Third, residual powder cross-contamination destroys the quality stability of new powder. If the grinding equipment is not cleaned in time, when grinding different types of polyurethane sponge (such as soft furniture sponge and hard insulation sponge, and sponge containing flame retardant and ordinary sponge), the residual adhesion powder in the equipment will mix with the new powder. These residual powders differ from the new sponge powder in composition and particle size, which will directly change the overall formula composition of the new powder (such as the content of flame retardant and the proportion of elastic factor), leading to fluctuations in the performance of the regenerated product such as elasticity, heat resistance, and flame retardant grade, destroying the quality stability, and even causing the regenerated product to be unqualified. In view of the above problems, in addition to optimizing the cooling system and controlling the grinding temperature, the quick disassembly design of the grinding equipment is also particularly important. SUMMARY

[0005] The technical problem of the present application is to provide a grinding equipment for recycling polyurethane sponge, which can quickly disassemble the lower grinding lip by disassembling and assembling the upper grinding lip, and then facilitate the cleaning of the grinding lip, saving the time for cleaning the equipment.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a grinding equipment for recycling polyurethane sponge, comprising a base, wherein the base is provided with an upper grinding part and a lower grinding part, and a feeding channel is arranged between the upper grinding part and the lower grinding part: an upper grinding lip is inserted into the bottom of the side wall of the upper grinding part, and the adjacent end bottoms are flush; a lower grinding lip is inserted into the top of the side wall of the lower grinding part, and the adjacent end tops are flush. The abrasive material passage is gradually reduced from inside to outside; The upper and lower grinding lips are arranged in pairs and can form a complete ring; The wedge is arranged on the inner wall of the lower grinding lip and can drive the lower grinding lip to move radially towards the lower grinding element; the lower grinding lip can be attached to the side wall of the lower grinding element by pressing the wedge; The driving element is installed in the base and is used to drive the rotation of the lower grinding lip to grind the material between the upper and lower grinding lips; The positioning element is vertically and elastically arranged in the lower grinding element and extends to the upper grinding element at the top; the positioning element can be driven by the wedge to move closer and tighten the lower grinding lip when it is lowered; The trigger element is horizontally and elastically arranged in the upper grinding element and can extend out of the upper grinding element at the end; the trigger element is pressed by the installed upper grinding lip to drive the positioning element to lower; The fastening element is installed on the side wall of the upper grinding lip and is used to fix the upper grinding lip.

[0007] As a further scheme of the present application, the positioning element comprises: The positioning block is vertically and slidably arranged with the lower grinding element and is provided with chamfers at the bottom on both sides; the positioning block can radially position the lower grinding lip through the wedge; The positioning spring is arranged between the positioning block and the lower grinding element; The positioning rod is fixedly arranged on the top of the positioning block and is vertically and slidably arranged with the upper grinding element at the top and extends below the trigger element and can be pressed downward by the trigger element.

[0008] As a further scheme of the present application, the lower grinding lips are provided with a connecting element, the connecting element is slidably connected with a reinforcing rib, the lower grinding lips are connected with the connecting element through the reinforcing rib; the wedge is vertically and slidably arranged with the lower grinding lip, a pressing groove is formed at the top of the inner side of the connecting element, the pressing groove is below the end of the wedge, the lower grinding lip is designed to be hollow inside and is provided with a pressure reducing groove outside, and the lower grinding lip is provided with a protrusion at the bottom of the inner side.

[0009] As a further scheme of the present application, the trigger element comprises: The trigger block is slidably arranged in the upper grinding element and is provided with chamfers at the inner side end; The trigger rod is fixedly arranged at the end of the trigger block and penetrates the upper grinding element at the outer side end; The trigger spring is fixedly arranged between the trigger block and the upper grinding element.

[0010] As a further scheme of the present application, the driving element comprises: The driving ring is rotatably arranged on the top of the base, The driving motor is installed in the base and is provided with a driving gear engaged with the driving ring at the output end. A driving key is fixed on the top of the driving ring, and a driving groove matched with the driving key is formed on the bottom of the lower grinding lip.

[0011] As a further scheme of the present application, the fastener comprises: A fixing member is fixed on the side wall of the upper grinding lip; A tensioning member is internally provided with a V-shaped tensioning groove; A tensioning bolt penetrates through the tensioning member and is threadedly connected with the upper grinding member at the inner end.

[0012] As a further scheme of the present application, an adjusting rod is fixed on the top of the lower grinding member, a adjusting screw is rotatably arranged on the top of the adjusting rod, the adjusting screw is threadedly connected with the upper grinding member, and the positioning rod is an extension rod.

[0013] As a further scheme of the present application, a material blocking member is slidably arranged on the top of the side wall of the lower grinding member, a material blocking spring is fixed between the material blocking member and the lower grinding member, a pressing ring is fixed on the side wall of the positioning rod, and the pressing ring is located above the material blocking member.

[0014] Compared with the prior art, the present application has the following beneficial effects: In the present application, when the upper grinding lip is pulled out, the trigger member is displaced, so that the positioning member can be lifted. At this time, the lower grinding lip is pulled out, and the wedge-shaped member can pass over the positioning member. The wedge-shaped member loses the positioning of the positioning member, so that the lower grinding lip is directly pulled out. The upper grinding lip and the lower grinding lip can be completely cleaned after disassembly, so as to avoid the influence of accumulated powder on the quality of the next powder. Through the disassembly of the upper grinding lip, the limitation of the lower grinding lip is cancelled. After the upper grinding lip is disassembled, the lower grinding lip is quickly disassembled, so as to facilitate the cleaning of the grinding lip and save the cleaning time of the equipment.

[0015] In the present application, the lower grinding lip is inserted into the lower grinding member. After the wedge-shaped member passes over the positioning member, the positioning member preliminarily positions the lower grinding lip through the wedge-shaped member. At this time, there is a gap between the lower grinding lip and the lower grinding member. Then, the upper grinding lip is inserted into the upper grinding member. The positioning member is lowered by the upper grinding lip through the extrusion of the trigger member. The positioning member tightly adheres the lower grinding lip to the lower grinding member through the wedge-shaped member. The assembly between the upper grinding lip and the lower grinding lip is completed, so as to realize quick installation and save installation time and difficulty. Through the assembly of the upper grinding lip, the lower grinding lip is limited, so as to strengthen the connection strength of the lower grinding lip and the lower grinding member. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0017] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the overall cross-sectional structure of the present application; Figure 3 is a schematic diagram of the overall structure of the present application Figure 2 is a schematic diagram of the enlarged structure at A in the present application; Figure 4 is a schematic diagram of the overall disassembly principle of the present application; Figure 5 is a schematic diagram of the overall structure of the present application Figure 2 is a schematic diagram of the enlarged structure at B in the present application; Figure 6 is a schematic diagram of the cross-sectional structure of the upper grinding element of the present application; Figure 7 is a schematic diagram of the overall structure of the present application Figure 6 is a schematic diagram of the enlarged structure at C in the present application; Figure 8 is a schematic diagram of the upper grinding lip structure of the present application; Figure 9 is a schematic diagram of the overall structure of the present application Figure 8 is a schematic diagram of the enlarged structure at D in the present application; Figure 10 is a schematic diagram of the cross-sectional structure of the lower grinding element of the present application; Figure 11 is a schematic diagram of the overall structure of the present application Figure 10 is a schematic diagram of the enlarged structure at E in the present application; Figure 12 is a schematic diagram of the lower grinding lip and its connection structure of the present application; Figure 13 is a schematic diagram of the internal structure of the lower grinding lip of the present application; In the drawings, the components represented by each reference numeral are listed as follows: 1, base; 11, feed inlet; 2, upper grinding element; 21, upper grinding lip; 22, adjustment screw; 3, lower grinding element; 31, lower grinding lip; 32, pressure reduction groove; 33, protrusion; 34, adjustment rod; 35, wedge-shaped element; 4, driving element; 41, driving ring; 42, driving motor; 43, driving key; 44, driving groove; 45, driving gear; 5, positioning element; 51, positioning block; 52, positioning spring; 53, positioning rod; 6, triggering element; 61, triggering block; 62, triggering rod; 63, triggering spring; 7, fastening element; 71, fixing element; 72, tensioning element; 73, tensioning groove; 74, tensioning bolt; 81, linking element; 82, reinforcing rib; 83, pressing groove; 9, material blocking element; 91, material blocking spring; 92, pressing ring. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] Please refer to Figures 1-13 The present application provides a technical solution: a kind of polyurethane sponge recycling with grinding equipment, including base 1, upper grinding piece 2 and lower grinding piece 3 are installed on the base 1, material inlet channel 11 is arranged between the upper grinding piece 2 and lower grinding piece 3: Upper grinding lip 21 is inserted into the bottom of the side wall of upper grinding piece 2, and the adjacent end bottom is flush; Lower grinding lip 31 is inserted into the top of the side wall of lower grinding piece 3, and the adjacent end top is flush; Grinding material channel is arranged between the upper grinding lip 21 and lower grinding lip 31, and the grinding material channel gradually decreases from inside to outside; The upper grinding lip 21 and lower grinding lip 31 are arranged in pairs and can form a complete ring; Wedge 35 is arranged in the inner side wall of lower grinding lip 31, which can drive lower grinding lip 31 to move radially towards lower grinding piece 3; by pressing down wedge 35, lower grinding lip 31 can be attached to the side wall of lower grinding piece 3; Drive member 4 is installed in base 1 for driving lower grinding lip 31 to rotate, and grinding material between upper grinding lip 21 and lower grinding lip 31; Positioning member 5 is vertically and elastically arranged in lower grinding piece 3, and the top extends into upper grinding piece 2; the positioning member 5 can drive lower grinding lip 31 to close and tighten by wedge 35 when it is lowered; Trigger 6 is horizontally and elastically arranged in upper grinding piece 2, and the end can extend out of upper grinding piece 2; by installing upper grinding lip 21 to press trigger 6, drive positioning member 5 to lower; Fastener 7 is installed on the side wall of upper grinding lip 21 for fixing upper grinding lip 21; Specifically, when the equipment needs to be cleaned; During disassembly, fastener 7 is removed, and upper grinding lip 21 is pulled out from both sides. Since upper grinding lip 21 is pulled out, trigger 6 moves radially outward to upper grinding piece 2 by elastic force, positioning member 5 rises, wedge 35 moves slightly radially outward to lower grinding piece 3, and lower grinding lip 31 loosens between lower grinding piece 3 with the movement of wedge 35. At this time, lower grinding lip 31 is pulled out, lower grinding lip 31 drives wedge 35 to move, wedge 35 passes positioning member 5, and the disassembly of upper grinding lip 21 and lower grinding lip 31 is completed. Then, upper grinding lip 21 and lower grinding lip 31 are cleaned; During the installation process, the lower grinding lip 31 is inserted into the lower grinding piece 3, the lower grinding lip 31 drives the wedge-shaped piece 35 to extrude the positioning piece 5, the positioning piece 5 is displaced through the elastic connection between the positioning piece 5 and the lower grinding piece 3, after the wedge-shaped piece 35 passes the positioning piece 5, the positioning piece 5 positions the wedge-shaped piece 35, thereby realizing the positioning of the lower grinding piece 3, and the preliminary installation of the lower grinding piece 3 is completed; the upper grinding lip 21 is inserted into the upper grinding piece 2, the upper grinding lip 21 extrudes the trigger piece 6, the trigger piece 6 moves with the upper grinding lip 21 (the distance of the movement of the trigger piece 6 is the distance of the movement of the upper grinding lip 2 when the upper grinding lip 2 contacts the trigger piece 6), the trigger piece 6 extrudes the positioning piece 5, the positioning piece 5 drives the wedge-shaped piece 35 to move downward, so that the lower grinding lip 31 is close to the lower grinding piece 3, and as the insertion depth of the upper grinding lip 21 increases, the gap between the lower grinding lip 31 and the lower grinding piece 3 gradually decreases, and the installation of the upper grinding lip 21 is completed. As described above, when cleaning is needed, the fastener 7 is removed, the upper grinding lip 21 can be directly pulled out, the trigger piece 6 is displaced, so that the positioning piece 5 can be lifted, at this time, the lower grinding lip 31 is pulled outwards, the lower grinding lip 31 drives the wedge-shaped piece 35 to pass the positioning piece 5, the positioning piece 5 releases the positioning of the lower grinding lip 31 by the wedge-shaped piece 35, thereby the lower grinding lip 31 is pulled out, the quick disassembly can be realized, the disassembly time and difficulty are saved, and the upper grinding lip 21 and the lower grinding lip 31 after disassembly can be cleaned more thoroughly, so that the accumulated powder does not affect the quality of the powder in the next time. When the cleaning is completed, the lower grinding lip 31 is inserted into the lower grinding piece 3, after the wedge-shaped piece 35 passes the positioning piece 5, the positioning piece 5 preliminarily positions the lower grinding lip 31 by the wedge-shaped piece 35, at this time, there is a gap between the lower grinding lip 31 and the lower grinding piece 3, the upper grinding lip 21 is inserted into the upper grinding piece 2, the positioning piece 5 is moved downward by the upper grinding lip 21 through extruding the trigger piece 6, the positioning piece 5 tightly adheres the lower grinding lip 31 to the lower grinding piece 3 through the wedge-shaped piece 35, the assembly between the upper grinding lip 21 and the lower grinding lip 31 is completed, the quick installation can be realized, and the installation time and difficulty are saved.

[0020] As a further scheme of the present application, the positioning piece 5 comprises: The positioning block 51 is vertically slidably arranged with the lower grinding piece 3, and the bottom of the positioning block 51 is provided with chamfers on both sides, the positioning block 51 can position the lower grinding lip 31 in the radial direction through the wedge-shaped piece 35; The positioning spring 52 is arranged between the positioning block 51 and the lower grinding piece 3; The positioning rod 53 is fixedly arranged on the top of the positioning block 51, and the top of the positioning rod 53 is vertically slidably arranged with the upper grinding piece 2 and extends below the trigger piece 6, and the positioning rod 53 can be extruded downward by the trigger piece 6; Specifically, referring to Figure 2 , Figure 3 and Figure 11When the lower grinding lip 31 is installed, the wedge-shaped part 35 first contacts the positioning block 51, the positioning block 51 rises and stretches the positioning spring 52, when the wedge-shaped part 35 passes the positioning block 51, the positioning spring 52 contracts and drives the positioning block 51 to descend, the positioning block 51 is between the wedge-shaped part 35 and the lower grinding lip 31 and is in contact with the wedge-shaped part 35, the positioning block 51 limits the radial outward movement of the wedge-shaped part 35 to the lower grinding part 3, realizes the limiting of the lower grinding lip 31, and the lower grinding lip 31 completes the preliminary installation, when the upper grinding lip 21 is installed, the trigger 6 extrudes the positioning rod 53 downward, the positioning rod 53 drives the positioning block 51 to descend and compresses the positioning spring 52, the positioning block 51 drives the wedge-shaped part 35 to move along the axis of the lower grinding part 3 through the chamfer, so that the lower grinding lip 31 is tightly attached to the side wall of the lower grinding part 3, avoiding the waste of resources caused by the falling of powder from the gap between the lower grinding lip 31 and the lower grinding part 3; realizing the quick installation of the upper grinding lip 21 and the lower grinding lip 31, and further reinforcing the lower grinding lip 31 through the installation of the upper grinding lip 21, improving the stability of the lower grinding lip 31, avoiding the shaking of the lower grinding lip 31, and causing the uneven particle size of the powder.

[0021] As a further scheme of the application, the lower grinding lip 31 is provided with a connecting piece 81, a reinforcing rib 82 is slidably connected in the connecting piece 81, and the lower grinding lip 31 is connected with the connecting piece 81 through the reinforcing rib 82; the wedge-shaped part 35 is vertically slidably arranged with the lower grinding lip 31, a pressing groove 83 is formed in the inner top of the connecting piece 81, the pressing groove 83 is below the end of the wedge-shaped part 35, the lower grinding lip 31 is designed to be hollow inside and is provided with a pressure reduction groove 32 outside, and a protrusion 33 is arranged at the inner bottom of the lower grinding lip 31. Specifically, referring to Figure 2 、 Figure 3 、 Figure 12 and Figure 13 , the connecting piece 81 is installed at one end of the lower grinding lip 31, the reinforcing rib 82 is rotated into the other lower grinding lip 31, the further connection between the lower grinding lips 31 is realized, the connection strength between the lower grinding lips 31 can be strengthened, and the hollow lower grinding lip 31 can be prevented from being deformed and damaged at the connection position, so that the particle size of the powder at the connection position of the lower grinding lip 31 is inconsistent with that at other positions, and the uniformity of the polyurethane foaming is affected. When the wedge 35 is pressed by the descending positioning block 51, the wedge 35 moves downward along the axis of the lower grinding piece 3, so that the lower grinding lip 31 is tightly attached to the lower grinding piece 3; at the same time, the wedge 35 descends, the wedge 35 presses the reinforcing rib 82 through the downward pressing groove 83, the inner side end of the reinforcing rib 82 descends, and the outer side end of the reinforcing rib 82 rises due to the limitation of the protrusion 33; the outer side end of the reinforcing rib 82 drives the outer side of the lower grinding lip 31 to rise, the gap between the lower grinding lip 31 and the upper grinding lip 21 (i.e. the powder discharge port) is reduced, thereby achieving small-range control of the powder particle size, increasing the application range of the equipment, and reducing the difficulty of the outer side end of the lower grinding lip 31 rising, while avoiding the outer side end of the lower grinding lip 31 from excessively rising, and weakening the connection between the lower grinding lip 31 and the driving piece 4.

[0022] As a further scheme of the present application, the trigger piece 6 comprises: a trigger block 61 slidingly arranged in the upper grinding piece 2, and a chamfer is formed at the inner side end of the trigger block 61; a trigger rod 62 fixedly arranged at the end of the trigger block 61, and the outer side end of the trigger rod 62 penetrates the upper grinding piece 2; a trigger spring 63 fixedly arranged between the trigger block 61 and the upper grinding piece 2; Specifically, referring to Figure 2 、 Figure 3 、 Figure 6 and Figure 7 , when the upper grinding lip 21 is installed, the upper grinding lip 21 first presses the trigger rod 62 extending out of the upper grinding piece 2, the trigger rod 62 drives the trigger block 61 to move into the upper grinding piece 2, and after the trigger block 61 contacts the positioning rod 53, the positioning rod 53 descends under the action of the chamfer of the trigger block 61, thereby strengthening the tightness of the lower grinding lip 31, and also being capable of controlling the gap between the lower grinding lip 31 and the upper grinding lip 21 according to the installation tightness of the upper grinding lip 21; when the upper grinding lip 21 is not installed, the positioning rod 53 can rise and will not affect the installation of the lower grinding lip 31, so that the fastening of the lower grinding lip 31 and the adjustment of the powder particle size are realized by a simple structure.

[0023] As a further scheme of the present application, the driving piece 4 comprises: a driving ring 41 rotationally arranged at the top of the base 1, a driving motor 42 installed in the base 1, and a driving gear 45 engaged with the driving ring 41 is installed at the output end of the driving motor 42; a driving key 43 fixedly arranged at the top of the driving ring 41, and a driving groove 44 matched with the driving key 43 is formed at the bottom of the lower grinding lip 31; Specifically, referring to Figure 2The driving motor 42 drives the gear 45 through the output shaft, the gear 45 drives the driving ring 41 through the engagement, the driving ring 41 drives the driving key 43, the driving key 43 drives the lower grinding lip 31 through the driving groove 44, the displacement between the lower grinding lip 31 and the upper grinding lip 21 is generated, and the grinding work on the polyol particles is realized; The number of the driving grooves 44 and the driving keys 43 is four and arranged in a circumferential array, two of the driving grooves 44 are located at the middle bottom of the two lower grinding lips 31, and the other two of the driving grooves 44 are located at the connection of the two lower grinding lips 31 (i.e. the driving grooves 44 are spliced from the grooves below the lower grinding lips 31), which can avoid the interference caused by the installation of the driving keys 43 to the lower grinding lips 31.

[0024] As a further scheme of the present application, the fastener 7 comprises: The fixing member 71 is fixed to the side wall of the upper grinding lip 21; The tensioning member 72 is internally provided with a V-shaped tensioning groove 73; The tensioning bolt 74 penetrates the tensioning member 72 and is threadedly connected to the upper grinding member 2 at the inner side; Specifically, referring to Figure 2 , Figure 8 and Figure 9 , after the upper grinding lip 21 is inserted into the upper grinding member 2, the tensioning groove 73 of the tensioning member 72 is directed towards the fixing member 71, then the tensioning bolt 74 is penetrated through the tensioning member 72 and is threadedly connected to the upper grinding member 2, and as the tensioning bolt 74 is tightened, the two fixing members 71 are approached by the tensioning groove 73, and as the fixing member 71 is fixed to the side wall of the upper grinding lip 21, the two upper grinding lips 21 are also approached, thereby completing the installation of the upper grinding lip 21.

[0025] As a further scheme of the present application, the lower grinding member 3 is fixedly provided with an adjusting rod 34 at the top, the adjusting rod 34 is rotatably provided with an adjusting screw 22 at the top, the adjusting screw 22 is threadedly connected to the upper grinding member 2, and the positioning rod 53 is a telescopic rod; Specifically, referring to Figure 5 , the height of the feeding channel 11 between the upper grinding member 2 and the lower grinding member 3 can be adjusted by rotating the adjusting screw 22, so that the solid particles of different sizes can be put in, and at the same time, the upper grinding lip 21 is lifted, the gap between the upper grinding lip 21 and the lower grinding lip 31 is increased, the particle size of the grinding can be widely adjusted, and the application range of the equipment is further increased.

[0026] As a further scheme of the present application, the lower grinding member 3 is fixedly provided with a blocking member 9 at the top of the side wall, the blocking spring 91 is fixedly arranged between the blocking member 9 and the lower grinding member 3, the pressing ring 92 is fixedly arranged on the side wall of the positioning rod 53, and the pressing ring 92 is located above the blocking member 9; Specifically, referring to Figure 2 , Figure 3 ,Figure 10 and Figure 11 After the upper grinding lip 21 is disassembled, the positioning rod 53 rises, the pressing ring 92 rises, the blocking material 9 loses pressure, the compressed blocking spring 91 is stretched to lift the blocking material 9, the top of the blocking material 9 is higher than the lower grinding part 3, and the blocking material 9 plays a role in blocking the falling of the material, avoids the falling of the granular material, increases the cleaning and re-feeding time, and enables the equipment to be disassembled and cleaned under the condition that the internal material is not completely ground, so that the equipment has a certain ability to respond to emergencies.

Claims

1. A grinding device for recycling polyurethane sponge, comprising a base (1), wherein an upper grinding element (2) and a lower grinding element (3) are mounted on the base (1), and a feeding channel (11) is provided between the upper grinding element (2) and the lower grinding element (3), characterized in that: The upper grinding lip (21) is inserted into the bottom of the side wall of the upper grinding piece (2), and the bottom of the adjacent ends are flush; The lower grinding lip (31) is inserted into the top of the side wall of the lower grinding piece (3), and the tops of the adjacent ends are flush; An abrasive channel is provided between the upper grinding lip (21) and the lower grinding lip (31), and the abrasive channel gradually decreases in size from the inside to the outside; The upper grinding lip (21) and the lower grinding lip (31) are both arranged in pairs and can form a complete ring; The wedge (35) is disposed on the inner sidewall of the lower grinding lip (31) and can drive the lower grinding lip (31) to move radially to the lower grinding workpiece (3); by pressing down the wedge (35), the lower grinding lip (31) can be attached to the sidewall of the lower grinding workpiece (3); The drive unit (4) is installed in the base (1) and is used to drive the lower grinding lip (31) to rotate and grind the material between the upper grinding lip (21) and the lower grinding lip (31). The positioning element (5) is vertically elastically set inside the lower grinding element (3), and its top extends into the upper grinding element (2); the positioning element (5) descends and can drive the lower grinding lip (31) to close and tighten through the wedge-shaped element (35); The trigger (6) is laterally elastically set inside the upper grinding part (2), and its end can extend out of the upper grinding part (2). By installing the upper grinding lip (21) to squeeze the trigger (6), the positioning part (5) is driven to descend. Fastener (7) is installed on the side wall of the upper grinding lip (21) for fixing the upper grinding lip (21).

2. The grinding equipment for recycling polyurethane sponge according to claim 1, characterized in that: The positioning element (5) includes: The positioning block (51) is vertically slidably disposed with the lower grinding part (3), and both sides of the bottom are provided with chamfers. The positioning block (51) can radially position the lower grinding lip (31) through the wedge (35). A positioning spring (52) is disposed between the positioning block (51) and the lower grinding part (3); The positioning rod (53) is fixed on the top of the positioning block (51), and its top is vertically slidably set on the upper grinding part (2) and extends to the bottom of the trigger (6), so that it can be pressed downward by the trigger (6).

3. The grinding equipment for recycling polyurethane sponge according to claim 1, characterized in that: A connecting member (81) is provided between the lower grinding lips (31), and a reinforcing rib (82) is slidably connected inside the connecting member (81). The lower grinding lips (31) are connected to the connecting member (81) through the reinforcing rib (82). The wedge-shaped member (35) is vertically slidably arranged with the lower grinding lips (31). A pressure groove (83) is opened on the top inner side of the connecting member (81). The pressure groove (83) is located below the end of the wedge-shaped member (35). The lower grinding lips (31) are hollow inside and a pressure relief groove (32) is opened on the outer side. A protrusion (33) is provided on the bottom inner side of the lower grinding lips (31).

4. A grinding equipment for recycling polyurethane sponge according to claim 1 or 2, characterized in that: The trigger (6) includes: The trigger block (61) is slidably disposed inside the upper grinding part (2), and has a chamfer on its inner end; The trigger rod (62) is fixed to the end of the trigger block (61), and its outer end passes through the upper grinding part (2). The trigger spring (63) is fixed between the trigger block (61) and the upper grinding piece (2).

5. The grinding equipment for recycling polyurethane sponge according to claim 4, characterized in that: The driving component (4) includes: The drive ring (41) is rotatably mounted on the top of the base (1). The drive motor (42) is installed in the base (1), and the output end is equipped with a drive gear (45) that meshes with the drive ring (41). A drive key (43) is fixed on the top of the drive ring (41), and a drive groove (44) that cooperates with the drive key (43) is opened at the bottom of the lower grinding lip (31).

6. The grinding equipment for recycling polyurethane sponge according to claim 5, characterized in that: The fastener (7) includes: The fastener (71) is fixed to the side wall of the upper grinding lip (21); The tensioning element (72) has a V-shaped tensioning groove (73) on its inner side; The tensioning bolt (74) passes through the tensioning member (72) and its inner end is threaded to the upper grinding member (2).

7. A grinding equipment for recycling polyurethane sponge according to claim 2, characterized in that: The lower grinding part (3) is fixedly provided with an adjusting rod (34) at the top. An adjusting screw (22) is rotatably provided on the top of the adjusting rod (34). The adjusting screw (22) is threadedly connected to the upper grinding part (2). The positioning rod (53) is a telescopic rod.

8. A grinding equipment for recycling polyurethane sponge according to claim 2, characterized in that: A material blocking element (9) is slidably provided on the top of the side wall of the lower grinding part (3). A material blocking spring (91) is fixed between the material blocking element (9) and the lower grinding part (3). A pressure ring (92) is fixed on the side wall of the positioning rod (53). The pressure ring (92) is located above the material blocking element (9).

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