Polishing mechanism for rubber strip PE welding machine

Abstract

The invention discloses a polishing mechanism for a rubber strip PE (polyethylene) welding machine, relates to the field of rubber sealing strip welding and butting equipment, and aims to solve the problems of angular deviation, redundant or defective section, 3M glue retraction and other bad states caused by the fact that a rubber strip is not pretreated before PE butting in the prior art. The device comprises a grinding assembly, a positioning fine adjustment assembly and a lifting driving assembly, the grinding assembly drives coaxial double grinding saw blades to synchronously rotate through a single motor, synchronous and efficient grinding of rubber strips on the two sides is achieved, and the grinding effects of the rubber strips on the two sides are consistent; the positioning fine-tuning assembly adopts a screw rod to link with double moving plates, a parallel push disc is driven to expand or contract through an inclined guide groove, the inner ends of rubber strips with different sizes are accurately propped against, and the positioning precision is improved by matching with visual adjustment of a measuring range plate; the lifting driving assembly is matched with the sliding rail through chain transmission to achieve stable lifting. A protective cover with a bottom dust suction function is arranged on the outer side of the polishing saw blade, cleaning is assisted by inclined knife edge airflow, and chippings are effectively collected. The device has the advantages of efficient grinding, self-adaptive adjustment, stable lifting and environment-friendly dust removal, and the PE welding quality and production efficiency of the rubber strips are remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of rubber sealing strip welding and butt-jointing equipment, in particular to a grinding mechanism for a rubber strip PE welding machine. Background Art

[0002] The PE welding process of rubber strips currently on the market mainly involves heating the ends to be welded and the PE film through IR lamps to make the temperature of the rubber strip and the PE film reach a certain temperature that can be welded, and then using the mechanical structure of the equipment to press the two ends of the rubber strip and the PE film together to make them stick together as a whole. This welding machine has a relatively simple structure and the equipment is easy to make, but it also has many disadvantages. First, the angle of the rubber strip product docking mold is fixed, so the cutting angle of the rubber strip is required to be high. The angle of the rubber strip is pre-processed before the PE film is pasted. If the cutting angle is too large or too small, the result is that the angle of the pasted product does not match the required angle of the docked product, which is easy to cause the product to be not firmly pasted, and the product is easy to crack after pasting, resulting in poor quality; second, when the rubber strip is pre-cut, due to factors such as tooling fixtures and cutting tools, it is possible that some parts of the cut surface will not be cut off or missing when the cutting angle is correct, resulting in poor quality of the product after docking; third, most of the products for PE docking are pasted with 3M tape on the rubber strip. Because the 3M tape is elastic, it will automatically retract to the side with the tape after cutting, which makes the 3M tape shorter than the body of the rubber strip. The docked product cannot be pasted together at the place of the 3M tape, resulting in a gap. In this way, when it is installed in a car or other places that need to be sealed, the place where the 3M glue is not docked will leak water or air, which will eventually affect the quality of the product.

[0003] In order to effectively solve the above-mentioned problems, the present invention proposes a grinding mechanism for a rubber strip PE welding machine for grinding the butted portion of the rubber strip before the rubber strip is butted with PE. Summary of the invention

[0004] (1) Technical issues to be solved

[0005] The present invention aims at the above-mentioned problems in the prior art and to make up for the deficiencies of the prior art. The present invention provides a grinding mechanism for a rubber strip PE welding machine which can be reasonably manufactured and used.

[0006] (2) Technical solution

[0007] In view of the existing problems of the above-mentioned welding machines and the shortcomings of the manufactured products, our company has designed and developed a method to grind the butt joint part of the rubber strip before PE butt jointing. The rubber strips with pre-cut angle deviation, excess or defective cross-section, 3M glue shrinkage and other bad conditions are polished and smoothed with the cross-section and 3M tape as a whole by a grinding saw blade, so that the two butt joint surfaces are completely aligned and level and match the butt joint mold. The products pasted in this way are not only beautiful and firm, but also free of water leakage and air leakage, which completely solves and improves the above-mentioned problems. Therefore, in order to solve the above-mentioned technical problems, the present invention provides such a grinding mechanism for a rubber strip PE welding machine, including a grinding component, the top of which is fixedly connected with a positioning fine-tuning component, and the grinding component is driven to rise and fall by a lifting drive component;

[0008] The grinding assembly comprises a first grinding saw blade and a second grinding saw blade which are synchronously driven by a grinding motor, and the first grinding saw blade and the second grinding saw blade synchronously grind the rubber strips on both sides of the positioning fine-tuning assembly after rising;

[0009] The positioning fine-tuning component includes a first push plate and a second push plate, which are parallel to each other and move synchronously to retract inward or expand outward; after adjustment, the first push plate and the second push plate are respectively parallel to the inner ends of the rubber strips on both sides.

[0010] Preferably, the grinding assembly comprises a moving frame, a grinding motor is installed at the bottom of the moving frame, and a pulley is installed at the output end of the grinding motor;

[0011] The first grinding saw blade and the second grinding saw blade are coaxially installed on the movable frame. A pulley is also installed on the coaxial connection between the first grinding saw blade and the second grinding saw blade. The pulley is connected to the pulley at the output end of the grinding motor through a belt.

[0012] Preferably, a pressure plate is reinforced on the outer sides of the first grinding saw blade and the second grinding saw blade;

[0013] A movable side plate is provided on a side of the movable frame facing the lifting drive assembly, and a first sliding block matching the lifting drive assembly is provided on the movable side plate.

[0014] Preferably, protective covers are respectively provided on both outward sides of the movable frame, the top of the protective cover is open and the bottom is sealed, and the bottom of the protective cover is connected outwardly with a dust extraction pipe;

[0015] The protective covers on both sides are respectively arranged on the outer side of the pressure plate of the first grinding saw blade and the outer side of the pressure plate of the second grinding saw blade.

[0016] Preferably, the positioning fine-tuning assembly comprises a mounting plate, and the mounting plate is reinforced on the top of the moving frame of the grinding assembly;

[0017] A placement seat is installed above the mounting plate, and the placement seat includes a screw placement groove, in which a screw is installed, and the front end of the screw is limited by a pressure block at the front end of the placement seat; after assembly, by rotating the screw, the first push plate and the second push plate are synchronously retracted inward or expanded outward.

[0018] Preferably, the placement seat is provided with a first movable plate respectively matched with the first push plate and a second movable plate matched with the second push plate, and the first movable plate and the second movable plate are stacked up and down and moved in the movable plate placement groove of the placement seat;

[0019] A first guide groove is provided in the middle of the first movable plate and is inclined toward one side of the second push plate, and a lower step is provided on the side of the first movable plate facing the first push plate;

[0020] A second guide groove is provided in the middle of the second movable plate and is inclined toward one side of the first push plate, and an upper step is provided on the side of the second movable plate facing the second push plate;

[0021] The first movable plate is pressed onto the second movable plate, and the thickness of the first movable plate is consistent with that of the second movable plate;

[0022] The screw rod is provided with a second slider which moves along the screw rod, the second slider is adaptively installed in the screw rod placement groove, the second slider is vertically provided with a moving column facing upward, the moving column is arranged upward and passes through the second guide groove and the first guide groove at the same time;

[0023] When not in use, the side of the first movable plate away from the lower step is close to the upper step, and the side of the second movable plate away from the upper step is close to the lower step.

[0024] Preferably, a first plug block is installed on a surface of the first movable plate facing the first push plate, and a second plug block is installed on a surface of the second movable plate facing the second push plate.

[0025] Preferably, a sliding head is sleeved on the top of the moving column, and the sliding head moves on the range plate on the top of the mounting seat, and a moving groove matching the moving direction of the moving column is provided in the middle of the range plate, and a range is provided on the outer side of the moving groove;

[0026] A baffle is sleeved on the middle of the sliding head. The length of the baffle is greater than the length of the marked measuring range. The baffle covers the measuring range plate and moves.

[0027] Preferably, a lower pressure plate inclined downward is provided at the bottom of the mounting seat, a cutting edge is threadedly mounted on the lower pressure plate, and the airflow direction of the cutting edge is toward the direction of the first grinding saw blade and the second grinding saw blade respectively.

[0028] Preferably, the lifting drive assembly includes a fixing frame installed on one side of the grinding assembly. A chain is provided inside the frame of the fixing frame. The two ends of the chain are respectively sleeved on a driving sprocket and a driven sprocket. The driving sprocket is connected to the output end of a lifting motor, and the driven sprocket is installed at the top of the fixing frame through a rotating shaft.

[0029] At the bottom end of one side of the chain, an L-shaped link with ears is installed. The link with ears is connected to a chain fixing plate through a bolt. The back of the chain fixing plate is locked with an L-shaped clamping plate through a bolt. The lower end of the clamping plate is fixedly connected to the moving side plate of the grinding assembly.

[0030] A slide rail is provided on one side of the fixing frame facing the moving side plate, and a first slider matching it is provided on the moving side plate.

[0031] An accordion cover is further provided between the clamping plate and the grinding assembly. The accordion cover is arranged in a "冂" shape facing the fixing frame. During lifting, the two ends of the accordion cover overlap on the front and back sides of the fixing frame.

[0032] Preferably, the first guide groove and the second guide groove are stacked in space to form a "人" - shaped different - plane structure.

[0033] Preferably, the driving sprocket and the driven sprocket are respectively installed on the fixing frame through rotating shafts. The driven sprocket is installed at the top of the fixing frame through a rotating shaft in a suspended manner, and the driving sprocket is installed at the bottom of the fixing frame through a rotating shaft in a suspended manner and is connected to the output end of the lifting motor.

[0034] Preferably, the range is marked numerically. According to actual processing, the distance that the sliding head moves towards the range can be made equal to the distance that the first push plate and the second push plate expand outward, which is convenient for better and more intuitive control.

[0035] Preferably, the screw rod and the second slider are in threaded fit. The moving column is inserted and fixed at the top of the second slider. The width of the screw rod placement groove matches the second slider and limits the second slider in the horizontal direction. During movement, the top of the second slider presses against the bottom of the second moving plate and is limited in the vertical direction by the screw rod placement groove and the second moving plate.

[0036] (3) Beneficial effects

[0037] In the present invention, by replacing the original PE docking machine in the prior art with a PE docking machine with a grinding structure, the requirements for the pre - cutting angle and cross - section quality of the rubber are reduced, and the defective products caused by the angle and cross - section quality problems due to pre - cutting are reduced. Thus, the processing speed of pre - cutting is improved. At the same time, the stability and yield rate of the pasted products will be greatly improved, the overall performance and quality of the products are greatly enhanced, and the quality of the final finished products of the products is optimized.

[0038] Specifically, the present invention has the following effects:

[0039] 1. The dual saw blades driven by a single motor can be operated synchronously, so that the rubber strips on both sides of the positioning fine-tuning component can be polished synchronously at the same time, which significantly improves the processing efficiency and achieves the effect of pre-polishing, so that the rubber strips on both sides can be effectively aligned in the future, improve the end surface quality of the rubber strips on both sides, and reduce the defective products caused by pre-cutting angles and section quality problems;

[0040] 2. The positioning fine-tuning component is set to a double push plate design, so that the inclined guide grooves of the first moving plate and the second moving plate are driven by the screw to realize the parallel movement of the first push plate and the second push plate and can achieve synchronous expansion or retraction, ensuring that the inner ends of the rubber strips on both sides are evenly pressed, adapting to workpieces of different sizes, and realizing effective positioning and detail fine-tuning;

[0041] 3. The range plate and the sliding head baffle can be used together to achieve visual adjustment of the range, improve fine-tuning accuracy, and reduce manual trial and error;

[0042] 4. The chain drive combined with the accordion cover protection can achieve a smooth lifting process and avoid debris intrusion, thus extending the life of the equipment. In addition, the integrated cooperation of the protective cover and the dust extraction pipe facilitates the dust extraction pipe to collect debris in real time, thus improving the working environment.

[0043] 5. By setting the pulley in the mobile frame, the pulley group is compactly arranged to reduce space occupancy, and the blade is directional blown, it is possible to clean the adhesion on the surface of the saw blade in a directional manner, reduce the frequency of shutdown maintenance, and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 for Figure 1 Schematic diagram of the back structure;

[0046] Figure 3 for Figure 1 Schematic diagram of the internal structure;

[0047] Figure 4 for Figure 2 Schematic diagram of the internal structure;

[0048] Figure 5 for Figure 3 A structural diagram from another perspective;

[0049] Figure 6 for Figure 5 Side view of

[0050] Figure 7for Figure 1 A top view of

[0051] Figure 8 A schematic diagram of the structural decomposition of the positioning and fine-tuning components;

[0052] Fig. 9 A top view of the structure split for positioning and fine-tuning components;

[0053] Fig.10 This is a schematic diagram of the overall structure after the positioning fine-tuning component is equipped with a baffle.

[0054] Reference numerals:

[0055] A grinding assembly (1), a grinding motor (11), a pulley (12), a belt (13), a first grinding saw blade (14), a second grinding saw blade (15), a movable frame (16), a movable side plate (161), a first slider (162), and a pressure plate (17);

[0056] Positioning fine adjustment component (2), first push plate (21), second push plate (22), screw rod (23), second slider (231), knife edge (24), mounting plate (25), first movable plate (26), first guide groove (261), lower step (262), first plug block (263), second movable plate (27), second guide groove (271), upper step (272), second plug block (273), range plate (28), movable groove (281), range (282), placement seat (29), pressing block (291), screw rod placement groove (292), movable plate placement groove (293);

[0057] A lifting drive assembly (3), a lifting motor (31), a chain (32), a chain fixing plate (33), a clamping plate (34), an accordion cover (35), a slide rail (36), and a fixing frame (37);

[0058] Protective cover (4), dust extraction pipe (41). DETAILED DESCRIPTION

[0059] The present invention is further described in conjunction with the accompanying drawings and embodiments.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present invention.

[0061] Example 1

[0062] like Figure 1-10 As shown, the present invention provides a first embodiment of a grinding mechanism for a rubber strip PE welding machine, comprising a grinding component 1, a positioning fine-tuning component 2 is fixedly connected to the top of the grinding component 1, and the grinding component 1 is driven to rise and fall by a lifting drive component 3;

[0063] The grinding assembly 1 comprises a first grinding saw blade 14 and a second grinding saw blade 15 which are synchronously driven by a grinding motor 11. After the first grinding saw blade 14 and the second grinding saw blade 15 are raised, they synchronously grind the rubber strips on both sides of the positioning fine-tuning assembly 2.

[0064] The grinding assembly 1 includes a moving frame 16, a grinding motor 11 is installed at the bottom of the moving frame 16, a pulley 12 is installed at the output end of the grinding motor 11, the first grinding saw blade 14 and the second grinding saw blade 15 are coaxially installed on the moving frame 16, and a pulley is also installed on the coaxial connection between the first grinding saw blade 14 and the second grinding saw blade 15, and the pulley is connected to the pulley 12 at the output end of the grinding motor 11 through a belt 13. For greater safety, a pressure plate 17 is reinforced on the outer side of the first grinding saw blade 14 and the second grinding saw blade 15, and a movable side plate 161 is provided on the side of the moving frame 16 facing the lifting drive assembly 3. A first sliding block 162 matching the lifting drive assembly 3 is provided on the movable side plate 161. In the process of grinding, because additional debris is generated, in order to facilitate and effectively collect them in a centralized manner, protective covers 4 are respectively provided on the two outward sides of the movable frame 16. The top of the protective cover 4 is open and the bottom is sealed. A dust extraction pipe 41 is connected outwardly to the bottom of the protective cover 4. The dust extraction pipe 41 is connected outwardly to the dust extraction mechanism in the prior art, so as to facilitate dust extraction and reduce the accumulation and splashing of debris. In order to effectively reduce the splashing of debris, the protective covers 4 on both sides are respectively arranged on the outer side of the pressure plate of the first grinding saw blade 14 and the outer side of the pressure plate of the second grinding saw blade 15;

[0065] The positioning fine-tuning component 2 includes a first push plate 21 and a second push plate 22, which are parallel to each other and synchronously retract inward or expand outward; after adjustment, the first push plate 21 and the second push plate 22 are respectively parallel to the inner ends of the rubber strips on both sides, and the positioning fine-tuning component 2 also includes a mounting plate 25, which is reinforced on the top of the mobile frame 16 of the grinding component 1, and a placement seat 29 is installed above the mounting plate 25, and the placement seat 29 includes a screw placement groove 292, and a screw 23 is assembled in the screw placement groove 292, and the front end of the screw 23 is passed through the pressure block 2 at the front end of the placement seat 29. 91 limit; after assembly, by rotating the screw 23, the first push plate 21 and the second push plate 22 are synchronously retracted inward or expanded outward; specifically: the placement seat 29 is provided with a first movable plate 26 that cooperates with the first push plate 21 and a second movable plate 27 that cooperates with the second push plate 22, respectively, the first movable plate 26 and the second movable plate 27 are stacked up and down in the movable plate placement groove 293 of the placement seat 29 and move, the middle part of the first movable plate 26 is provided with a first guide groove 261 that is inclined toward the side of the second push plate 22, the first movable plate 26 is provided with a lower step 262 on the side facing the first push plate 21, and the second movable plate A second guide groove 271 is provided in the middle of the first push plate 27 and is inclined toward one side of the first push plate 21. An upper step 272 is provided on the side of the second movable plate 27 facing the second push plate 22. The first movable plate 26 is pressed on the second movable plate 27. The thickness of the first movable plate 26 and the second movable plate 27 are consistent. A second slider 231 is provided on the screw rod 23 and moves along the screw rod 23. The second slider 231 is adaptively installed in the screw rod placement groove 292. A moving column is vertically provided upward on the second slider 231. The moving column is arranged upward and passes through the second guide groove 271 and the first guide groove 261 at the same time. When not in use, the first movable plate The side of the second movable plate 26 away from the lower step 262 is close to the upper step 272, and the side of the second movable plate 27 away from the upper step 272 is close to the lower step 262. It should be noted that the first push plate 21 and the first movable plate 26 are plug-connected, and the second push plate 22 and the second movable plate 27 are also plug-connected. Therefore, the first movable plate 26 is installed with a first plug block 263 on the side facing the first push plate 21, and the second movable plate 27 is installed with a second plug block 273 on the side facing the second push plate 22. Of course, the method listed in this scheme can be equivalently replaced by other methods such as card connection and threaded connection in the prior art;In order to more intuitively obtain the distance between the first push plate 21 and the second push plate 22 during the movement, during processing, the distance between the two push plates facing outward is made into the movement distance of the second slider 231 according to a ratio of 1:1, making it more visual. A sliding head is sleeved on the top of the moving column, and the sliding head moves on the range plate 28 on the top of the mounting seat 29. For this purpose, a moving groove 281 matching the moving direction of the moving column is provided in the middle of the range plate 28, and a range 282 is provided outside the moving groove 281. In order to reduce dust falling into the moving groove when not in use, see; Fig.10 , a retaining piece is sleeved in the middle of the sliding head, and the length of the retaining piece is greater than the length of the marked range 282. The retaining piece covers and moves on the range plate 28. In order to guide the debris to be concentrated and blown into the interior of the protective cover 4, a downwardly inclined lower pressing plate is provided at the bottom of the mounting seat 29. A cutting edge 24 is threadedly installed on the lower pressing plate, and the air flow directions of the cutting edge 24 are respectively towards the directions of the first grinding saw blade 14 and the second grinding saw blade 15. When the grinding is completed, when the cutting edge moves downward, the cutting edge 24 opens, blowing the debris on the ground rubber strip into the protective cover 4, and then discharging the debris outward through the dust extraction pipe 41. It should be noted that in addition to ensuring that the first grinding saw blade 14 and the second grinding saw blade 15 will not fly out under special circumstances, the bottom of the protective cover 4 can also play the role of dust collection;

[0066] The lifting drive assembly 3 includes a fixed frame 37 installed on one side of the grinding assembly 1. A chain 32 is provided inside the frame of the fixed frame 37. The two ends of the chain 32 are respectively sleeved on the driving sprocket and the driven sprocket. The driving sprocket is fixed in position through a rotating shaft at the bottom, and the driving sprocket is connected to the output end of the lifting motor 31. The driven sprocket is installed at the top of the fixed frame 37 through a rotating shaft. In order to achieve the effect of driving the moving frame 16, an L-shaped link with an ear is installed at the bottom end of one side of the chain 32. The link with an ear is connected to the chain fixing plate 33 through a bolt. The rear of the chain fixing plate 33 is locked with an L-shaped clamping plate 34 through a bolt. The lower end of the clamping plate 34 is fixedly connected to the moving side plate 161 of the grinding assembly 1. A slide rail 36 is provided on one side of the fixed frame 37 facing the moving side plate 161, and a first slider 162 matching it is provided on the moving side plate 161 to facilitate matching sliding. An accordion cover 35 is also provided between the clamping plate 34 and the grinding assembly 1. The accordion cover 35 is arranged in a "冂" shape facing the fixed frame 37; during lifting, the two ends of the accordion cover 35 overlap on the front and rear sides of the fixed frame 37. By setting the accordion cover 35, the protection effect is improved, and debris intrusion can be avoided during the lifting process, extending the service life of the equipment.

[0067] Working principle:

[0068] During use of the present invention, the positioning fine-tuning component is operated by pre-grinding the required length of the rubber strip. Before the operation begins, the two rubber strips are placed on both sides of the first push plate and the second push plate respectively. After adjusting the length according to the required grinding, the first push plate and the second push plate are respectively abutted against the inner sides of the two rubber strips. The adjusted sizes of each batch of rubber strips are different, and a batch only needs to be adjusted once. The specific operation is to convert the distance that the slider moves when the screw is rotated into the outward or inward distance of the first push plate and the second push plate. Specifically: the screw is rotated, and the second slider on the screw that matches the thread thereof moves. The movement of the second slider drives the moving column to move along the first guide groove , and the second guide groove at the same time, so that the first moving plate and the second moving plate are pushed in the opposite direction and displaced outward. It should be noted that at this time, the sliding head connected to the moving column moves along the range line on the range plate, so that the operator can well observe the distance that the first push plate and the second push plate move outward, thereby driving the first push plate and the second push plate to expand or contract in parallel, and intuitively judge the adjustment amplitude through the range scale. After the adjustment is completed, the rubber strips on both sides are fixed to the outer sides of the two push plates respectively through the fixing device. It should be noted that the structure of fixing the rubber strip is not an improvement point of this solution, so it is not drawn in the figure, and the existing structure that can fix the rubber strip can be used;

[0069] Turn on the grinding motor to achieve double-sided synchronous processing. The grinding motor drives the pulley, which is connected to another pulley (on the same axis) through a belt, and then drives the first grinding saw blade and the second grinding saw blade to rotate. In this process, the grinding motor drives the double saw blades to rotate at high speed through the belt, and the pressure plate reinforces the stability of the saw blades.

[0070] Turn on the lifting motor, and drive the chain through the lifting motor to drive the chain fixing plate, the clamping plate and the movable side plate (i.e., the movable frame) to move up along the slide rail, so that the first grinding saw blade and the second grinding saw blade rise to a preset height, contact the rubber strip and perform grinding;

[0071] During the grinding process, the protective cover moves with the mobile frame, so the protective cover can effectively collect dust and debris, and when the mobile frame descends, the airflow direction of the blade is downward along the grinding direction, and directional blowing assists in cleaning the debris on the surface of the saw blade, effectively blowing the debris into the dust cover, and finally extracting the debris from the bottom through the dust extraction pipe, which facilitates the centralized treatment of debris and dust and reduces the pollution of the factory environment.

[0072] The above embodiments only express the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but the present invention is not limited to these embodiments. It should be noted that it is obvious to those skilled in the art. Without departing from the purpose of the present invention, any improvement made shall fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A grinding mechanism for a rubber strip PE welding machine, characterized by: It comprises a grinding component (1), the top of which is fixedly connected with a positioning fine-tuning component (2), and the grinding component (1) is driven to rise and fall by a lifting drive component (3); The grinding assembly (1) comprises a first grinding saw blade (14) and a second grinding saw blade (15) which are synchronously driven by a grinding motor (11); the first grinding saw blade (14) and the second grinding saw blade (15) are raised and then synchronously grind the rubber strips on both sides of the positioning fine-tuning assembly (2); The positioning fine-tuning component (2) comprises a first push plate (21) and a second push plate (22), wherein the first push plate (21) and the second push plate (22) are parallel to each other and synchronously retract inward or expand outward; after adjustment, the first push plate (21) and the second push plate (22) are respectively parallel to and abut against the inner ends of the rubber strips on both sides.

2. A grinding mechanism for a rubber strip PE welding machine according to claim 1, characterized in that: The grinding assembly (1) comprises a moving frame (16), a grinding motor (11) is installed at the bottom of the moving frame (16), and a pulley (12) is installed at the output end of the grinding motor (11); The first grinding saw blade (14) and the second grinding saw blade (15) are coaxially mounted on a movable frame (16); a pulley is also mounted on the coaxial axis connecting the first grinding saw blade (14) and the second grinding saw blade (15); the pulley is connected to a pulley (12) at the output end of the grinding motor (11) via a belt (13).

3. A grinding mechanism for a rubber strip PE welding machine according to claim 2, characterized in that: The outer sides of the first grinding saw blade (14) and the second grinding saw blade (15) are reinforced with a pressure plate (17); A movable side plate (161) is provided on the side of the movable frame (16) facing the lifting drive assembly (3), and a first sliding block (162) matching the lifting drive assembly (3) is provided on the movable side plate (161).

4. A grinding mechanism for a rubber strip PE welding machine according to claim 3, characterized in that: The two outwardly facing sides of the movable frame (16) are respectively provided with protective covers (4), the top of the protective cover (4) is open and the bottom is sealed, and the bottom of the protective cover (4) is connected outwardly with a dust extraction pipe (41); The protective covers (4) on both sides are respectively arranged on the outer side of the pressure plate of the first grinding saw blade (14) and the outer side of the pressure plate of the second grinding saw blade (15).

5. A grinding mechanism for a rubber strip PE welding machine according to any one of claims 1 to 4, characterized in that: The positioning fine-tuning assembly (2) comprises a mounting plate (25), and the mounting plate (25) is reinforced on the top of the moving frame (16) of the grinding assembly (1); A seating seat (29) is installed above the mounting plate (25), and the seating seat (29) includes a screw placement groove (292), a screw (23) is installed in the screw placement groove (292), and the front end of the screw (23) is limited by a pressing block (291) at the front end of the seating seat (29); after assembly, by rotating the screw (23), the first push plate (21) and the second push plate (22) are synchronously retracted inward or expanded outward.

6. A grinding mechanism for a rubber strip PE welding machine according to claim 5, characterized in that: The placement seat (29) is provided with a first movable plate (26) respectively matched with the first push plate (21) and a second movable plate (27) matched with the second push plate (22); the first movable plate (26) and the second movable plate (27) are stacked up and down and move in the movable plate placement groove (293) of the placement seat (29); A first guide groove (261) is provided in the middle of the first movable plate (26) and is arranged obliquely toward one side of the second push plate (22); a lower step (262) is provided on the side of the first movable plate (26) facing the first push plate (21); A second guide groove (271) is provided in the middle of the second movable plate (27) and is arranged obliquely toward one side of the first push plate (21); and an upper step (272) is provided on the side of the second movable plate (27) facing the second push plate (22); The first movable plate (26) is pressed onto the second movable plate (27), and the first movable plate (26) and the second movable plate (27) have the same thickness; The screw rod (23) is provided with a second slider (231) that moves along the screw rod (23), the second slider (231) is adaptively installed in the screw rod placement groove (292), the second slider (231) is vertically provided with a moving column facing upward, the moving column is arranged upward and passes through the second guide groove (271) and the first guide groove (261) at the same time; When not in use, the side of the first movable plate (26) away from the lower step (262) abuts against the upper step (272), and the side of the second movable plate (27) away from the upper step (272) abuts against the lower step (262).

7. A grinding mechanism for a rubber strip PE welding machine according to claim 6, characterized in that: A first plug block (263) is installed on a surface of the first movable plate (26) facing the first push plate (21), and a second plug block (273) is installed on a surface of the second movable plate (27) facing the second push plate (22).

8. A grinding mechanism for a rubber strip PE welding machine according to claim 7, characterized in that: A sliding head is sleeved on the top of the moving column, and the sliding head moves on a range plate (28) on the top of the mounting seat (29). A moving groove (281) matching the moving direction of the moving column is provided in the middle of the range plate (28), and a range (282) is provided on the outer side of the moving groove (281); A baffle is sleeved in the middle of the sliding head, the length of the baffle is greater than the length of the marked measuring range (282), and the baffle covers the measuring range plate (28) and moves.

9. A grinding mechanism for a rubber strip PE welding machine according to claim 8, characterized in that: A lower pressure plate inclined downward is provided at the bottom of the placement seat (29), and a cutting edge (24) is threadedly mounted on the lower pressure plate. The airflow direction of the cutting edge (24) is respectively toward the direction of the first grinding saw blade (14) and the second grinding saw blade (15).

10. A grinding mechanism for a rubber strip PE welding machine according to claim 9, characterized in that: The lifting drive assembly (3) comprises a fixed frame (37) installed on one side of the grinding assembly (1), a chain (32) is arranged inside the frame of the fixed frame (37), two ends of the chain (32) are respectively sleeved on a driving sprocket and a driven sprocket, the driving sprocket is connected to the output end of the lifting motor (31), and the driven sprocket is installed on the top of the fixed frame (37) through a rotating shaft; An L-shaped outer chain link with an ear is installed at the bottom end of the chain (32) on one side, and the outer chain link with an ear is connected to the chain fixing plate (33) by bolts. The rear of the chain fixing plate (33) is locked with an L-shaped clamping plate (34) by bolts, and the lower end of the clamping plate (34) is fixedly connected to the movable side plate (161) of the grinding assembly (1); One side of the fixing frame (37) facing the moving side plate (161) is provided with a slide rail (36), and a first slider (162) matching therewith is arranged on the moving side plate (161); An accordion cover (35) is further arranged between the clamping plate (34) and the grinding assembly (1). The accordion cover (35) is arranged in a "冂" shape facing the fixing frame (37). When lifting, both ends of the accordion cover (35) are lapped on the front and rear sides of the fixing frame (37).

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