An edge cutting device for flame-retardant polyethylene master sheet for automobile interior production

Abstract

This utility model relates to the field of automotive interior manufacturing and discloses a trimming device for flame-retardant polyethylene masterbatch used in automotive interior manufacturing. It includes a frame with support seats mounted at the front and rear of the frame. Two connecting rods on the front and rear support seats are equipped with trimming blades. Each trimming blade includes a transmission housing. Two sliding sleeves are fixed to the outside of the transmission housing and slide along the connecting rod. Tensioning bolts A are threaded onto the outer walls of the sliding sleeves and abut against the outer surface of the connecting rod. Worm gears are installed vertically inside the transmission housing, meshing with a worm. A through hole is opened on the inner side of the transmission housing at a position corresponding to the connecting rod. A rotating hole corresponding to the worm is opened on the outer side of the transmission housing, allowing the worm to rotate within the rotating hole. A connecting sleeve is welded to the outer wall of the worm gears. The worm gears and the connecting sleeve are fitted onto the connecting rod. A semi-circular cutter is fixed to the outer end of the connecting sleeve. This utility model achieves a cutting action through the two semi-circular cutters, forming a "scissor"-like shearing effect, reducing cutting resistance and distributing the cutting force more evenly on the two blades.

Description

Technical Field

[0001] This utility model relates to the field of automotive interior manufacturing, and in particular to a flame-retardant polyethylene masterbatch trimming device for automotive interior manufacturing. Background Technology

[0002] In automotive interior manufacturing, the smoothness and dimensional accuracy of the edges of flame-retardant polyethylene (PVC) master sheets directly affect the quality of subsequent hot pressing and molding processes. Currently, the industry primarily uses single-blade cutting devices for trimming the edges of flame-retardant PVC master sheets. A typical structure includes a fixed blade holder, a single blade mounted on the blade holder, and a support roller for conveying the master sheet. During operation, the single blade cuts the edges of the conveying master sheet by pressing downwards or sliding horizontally to remove excess edge strips.

[0003] When a single blade is used for cutting, the mother sheet is subjected to a unidirectional cutting force, which causes it to deform downwards. Since there is no support underneath the mother sheet, it will dent towards the blade, resulting in tearing, burrs, wavy edges, or irregular shapes in the cut. This cannot meet the high precision requirements of automotive interior trim for the edges of the mother sheet. Utility Model Content

[0004] The purpose of this utility model is to provide a flame-retardant polyethylene mother sheet edge trimming device for automotive interior production. Through a "scissor-type" double-blade cutting structure, it solves the problems of tearing, burrs, and material misalignment that are easily caused by single-blade cutting, and achieves uniform and flat trimming of the mother sheet edge, ensuring the consistency of edge strip width and the quality of the mother sheet product.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A trimming device for flame-retardant polyethylene master sheets used in automotive interior production includes a frame. Support rollers are mounted on the left and right sides of the top surface of the frame, with both ends of the support rollers connected to the frame via bearing seats. Support seats are mounted at the front and rear of the middle of the frame, and two connecting rods are fixed between the front and rear support seats. Trimming blades are mounted on the two connecting rods. The support rollers are used for supporting and conveying the master sheet. The front and rear edges of the master sheet are trimmed by the trimming blades to obtain edge strips. The trimming blades include a transmission housing, a sliding sleeve, a tensioning bolt A, a worm gear, a worm, a through hole, a rotating hole, a connecting sleeve, and a semi-circular cutter. The transmission housing is located outside... Two sliding sleeves are fixed to the side and slide along the connecting rod. A tensioning bolt A is threadedly connected to the outer wall of the sliding sleeve and abuts against the outer surface of the connecting rod. Worm gears are installed at the upper and lower positions inside the transmission housing, and the two worm gears mesh with the worm. A through hole is opened at the corresponding position of the connecting rod on the inner side of the transmission housing, and a rotating hole corresponding to the worm is opened on the outer side of the transmission housing. The worm rotates in the rotating hole. A connecting sleeve is welded to the outer wall of the worm gear and passes through the through hole on the outside of the transmission housing. The worm gear and the connecting sleeve are sleeved on the connecting rod, and a semi-circular cutter is fixed to the outer end of the connecting sleeve.

[0006] Preferably, the semi-circular cutter includes a semi-circular ring A, a semi-circular ring B, a blade, and a tensioning bolt B. The semi-circular ring A and the semi-circular ring B are connected to the connecting sleeve by bolts to form a complete ring structure. A semi-circular blade is fixed to the outside of the semi-circular ring A. The tensioning bolt B is threaded to the outer wall of the semi-circular ring B. The inner side of the tensioning bolt B abuts against the outer wall of the connecting sleeve.

[0007] Preferably, the support base includes a rectangular shell, a sliding plate, mounting holes, and a tensioning bolt C. The bottom of the support base is a rectangular shell, which is hollow and is fixed to the frame by bolts. The sliding plate is located above the rectangular shell and is vertically slidably connected inside the rectangular shell. Two mounting holes are passed through the sliding plate, and the connecting rod is installed in the mounting holes. The tensioning bolt C is threaded onto the outside of the rectangular shell, and the inner end of the tensioning bolt C abuts against the outer surface of the sliding plate.

[0008] Preferably, a screw wheel is fixed to the outer end of the worm gear.

[0009] Preferably, the connecting sleeve has an installation groove, and the semicircular ring A and semicircular ring B are fitted into the installation groove.

[0010] Preferably, the outer surface of the skateboard is engraved with anti-slip patterns in the vertical direction, and the tensioning bolt C abuts against the anti-slip patterns.

[0011] Preferably, the outer end of the connecting rod has an annular groove, and the retaining spring is located on the outer side of the slide plate and is fastened in the groove to restrict the axial movement of the connecting rod.

[0012] This utility model has the following beneficial effects: 1. By using two semi-circular cutting blades to achieve a blade-to-blade approach, a "scissor"-like shearing action is formed, which avoids the tearing, burrs, wavy edges, or irregular shapes caused by the deformation of the mother piece due to downward pressure when cutting with a single blade. This reduces cutting resistance and makes the shearing action relatively gentle. At the same time, the cutting force is more evenly distributed on the two blades. Moreover, by rotating the worm gear, the two semi-circular cutting blades are rotated to create a gap. The edge trimming blade can be moved left and right to change the position of the edge of the mother piece and adjust the width of the trimmed edge strip. 2. The semi-circular cutter adopts a separate design of semi-circular ring A and semi-circular ring B. The blade can be quickly replaced by loosening the tension bolt B without disassembling the transmission housing or connecting rod. In addition, the mounting groove on the connecting sleeve can fix the axial position of the blade, ensuring accurate alignment of the upper and lower blades and avoiding cutting errors caused by blade misalignment. 3. The slide plate of the support base can slide vertically along the rectangular shell and be fixed in position by tension bolt C. This design can accurately adjust the height of the trimming blade so that the blade edge of the semi-circular cutter is aligned with the center of the thickness of the mother sheet, ensuring the symmetry of the double-blade cutting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a schematic diagram of the edge trimming tool structure of this utility model; Figure 3 This is a schematic diagram of the semi-circular cutter structure of this utility model; Figure 4 This is a schematic diagram of the blade setting for this utility model; Figure 5 This is a schematic diagram of the support structure of this utility model; Icons: 1. Frame; 2. Support roller; 3. Support base; 31. Rectangular shell; 32. Slide plate; 33. Mounting hole; 34. Tensioning bolt C; 35. Anti-slip texture; 36. Slot; 37. Snap ring; 4. Connecting rod; 5. Trimming blade; 51. Transmission housing; 52. Sliding sleeve; 53. Tensioning bolt A; 54. Worm gear; 55. Worm; 551. Tightening wheel; 56. Through hole; 57. Rotary hole; 58. Connecting sleeve; 581. Mounting groove; 59. Semi-circular cutter; 591. Semi-circular ring A; 592. Semi-circular ring B; 593. Blade; 594. Tensioning bolt B; 6. Mother plate; 7. Edge strip. Detailed Implementation

[0014] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1-5As shown in this embodiment, a flame-retardant polyethylene masterbatch trimming device for automotive interior production includes a frame 1, which is welded from steel and has a rectangular frame structure. The bottom is provided with anti-slip pads to ensure the stability of the device operation and to withstand the mechanical load during the trimming process. Support rollers 2 are installed on the left and right sides of the top surface of the frame 1. The two ends of the support rollers 2 are mounted to the frame 1 via bearing seats. Support seats 3 are installed at the front and rear of the middle of the frame 1. Two cylindrical connecting rods 4 are fixed between the front and rear support seats 3. Trimming blades 5 are installed on the two connecting rods 4. The support rollers 2 are used to support and convey the mother sheet 6. The mother sheet 6 is laid flat on the two support rollers 2 to maintain its flatness during conveying. The mother sheet 6 is moved by an external winding machine. The front and rear edges of the mother sheet 6 are trimmed by the trimming blades 5 to obtain edge strips 7. The trimming blades 5 are key components for achieving "scissor-like" trimming, including a transmission housing 51, a sliding sleeve 52, a tensioning bolt A 53, a worm gear 54, a worm 55, a through hole 56, a rotating hole 57, a connecting sleeve 58, and a semi-circular cutter 59. Two sliding sleeves 52 are integrally formed on the outer side of the transmission housing 51. The sliding sleeves 52 slide along the connecting rod 4. Tensioning bolts A53 are threadedly connected to the outer wall of the sliding sleeves 52. The tensioning bolts A53 abut against the outer surface of the connecting rod 4. Worm gears 54 are installed at the upper and lower positions inside the transmission housing 51. The two worm gears 54 mesh with the worm 55. A through hole 56 is opened on the inner side of the transmission housing 51 at the corresponding position of the connecting rod 4. A rotating hole 57 corresponding to the worm 55 is opened on the outer side of the transmission housing 51. The worm 55 rotates in the rotating hole 57. A connecting sleeve 58 is welded to the outer wall of the worm gear 54. The connecting sleeve 58 passes through the through hole 56 and is located on the outside of the transmission housing 51. The worm gear 54 and the connecting sleeve 58 are sleeved on the connecting rod 4. A semi-circular cutter 59 is fixed to the outer end of the connecting sleeve 58.

[0017] Specifically, by rotating the worm gear 55, the two worm wheels and the connecting sleeve 58 rotate in opposite directions, simultaneously causing the two semi-circular cutters 59 to rotate in opposite directions. When the two semi-circular cutters 59 rotate to the contact position, they are aligned, enabling the trimming of the edges of the mother piece 6. This alignment of the two semi-circular cutters 59 creates a "scissor-like" shearing action, avoiding the tearing, burrs, wavy edges, or irregular shapes caused by the downward deformation of the mother piece during single-blade cutting. This reduces cutting resistance and makes the shearing action relatively gentle. Simultaneously, the cutting force is more evenly distributed across the two blades. Compared to a single blade bearing all the pressure and friction, the wear of the double-blade tip is relatively more even and slower, extending the tool life. The upper and lower surfaces of the mother piece 6 are constrained by the blades, effectively preventing material slippage and displacement during cutting. This ensures a consistent cut width throughout the entire cutting length, resulting in better uniformity of the strip edge 7 width and improved cutting effect. When the two semi-circular cutters 59 rotate to create a gap, the position of the edge of the cutting mother piece 6 can be changed by moving the edge cutting blade 5 left and right, and the width of the cut edge strip 7 can be adjusted. Moreover, the worm gear 54 and worm 55 transmission have self-locking properties, so that the angle of the semi-circular cutter 59 can remain stable.

[0018] The semi-circular cutter 59 includes a semi-circular ring A591, a semi-circular ring B592, a blade 593, and a tensioning bolt B594. The semi-circular ring A591 and the semi-circular ring B592 are bolted together to form a complete ring structure that is sleeved on the connecting sleeve 58. A semi-circular high-speed steel blade 593 is fixed to the outside of the semi-circular ring A591. The tensioning bolt B594 is threadedly connected to the outer wall of the semi-circular ring B592. The inner side of the tensioning bolt B594 abuts against the outer wall of the connecting sleeve 58.

[0019] Specifically, the blade 593 and the connecting sleeve 58 adopt a separate design. They are installed with the connecting sleeve 58 through semi-circular rings A591 and B592. The blade can be removed from the connecting sleeve 58 by loosening the tension bolt B594. There is no need to disassemble the entire trimming blade 5, which reduces maintenance costs and makes disassembly simple and quick.

[0020] The support base 3 includes a rectangular shell 31, a sliding plate 32, mounting holes 33, and a tensioning bolt C34. The bottom of the support base 3 is a rectangular shell 31, which is fixed to the front and rear sides of the middle of the frame 1 by bolts. It has a hollow cuboid structure and is used to accommodate the sliding plate 32. The sliding plate 32 is inserted into the hollow cavity of the rectangular shell 31 and can slide vertically. Two mounting holes 33 are passed through the sliding plate 32. The connecting rod 4 is installed in the mounting holes 33. The rectangular shell 31 is externally threaded with a tensioning bolt C34, and the inner end of the tensioning bolt C34 abuts against the outer surface of the sliding plate 32.

[0021] Specifically, by sliding the slide plate 32 up and down, the height of the connecting rod 4 is changed, so that the blade 593 of the semi-circular cutter 59 is aligned with the thickness center of the mother piece 6, ensuring the symmetry of the double-blade cutting.

[0022] The outer end of the worm gear 55 is fixed with a screw wheel 551, which facilitates manual rotation of the worm gear 55.

[0023] The connecting sleeve 58 has an installation groove 581, and the semi-circular ring A591 and semi-circular ring B592 are fitted into the installation groove 581.

[0024] Specifically, by setting the mounting slot 581, the blade 593 can be fixed in the axial position of the connecting sleeve 58, ensuring that the upper and lower blades 593 are precisely aligned.

[0025] The outer surface of the slide plate 32 is vertically engraved with anti-slip textures 35, and the tensioning bolt C34 abuts against the anti-slip textures 35. The anti-slip textures 35 increase friction to prevent the slide plate 32 from loosening, ensuring that the position of the slide plate 32 remains unchanged after adjustment, and guaranteeing the accuracy of blade alignment.

[0026] The connecting rod 4 has an annular groove 36 at its outer end. The retaining spring 37 is located on the outer side of the slide plate 32 and is fastened in the groove 36. Through the cooperation between the retaining spring 37 and the groove 36, the connecting rod 4 is restricted from sliding along the axial direction, ensuring the stability of the position of the trimming knife 5.

[0027] The working principle of this utility model is as follows: Height adjustment: The slide plate 32 of the support base 3 can slide vertically along the rectangular shell 31 and is fixed in position by the tension bolt C34. Loosen the tension bolt C34 and slide the slide plate 32 up and down so that the semi-circular cutting blade 59 of the trimming blade 5 is aligned with the thickness center of the mother sheet 6.

[0028] Edge trimming position adjustment: The transmission housing 51 of the edge trimming blade 5 is sleeved on the connecting rod 4 through the sliding sleeve 52 and slides left and right along the connecting rod 4. Loosen the tension bolt A53, slide the transmission housing 51 to the desired position, and then tighten the tension bolt A53 to fix the left and right position of the edge trimming blade 5 so that the edge trimming blade 5 is located at the designated edge of the mother piece 6.

[0029] Adjusting the tool setting state: Rotating the turning wheel 551 drives the worm 55 to rotate. The tooth surfaces of the two worm wheels 54 contact the upper and lower tooth surfaces of the worm 55 respectively. Therefore, when the worm 55 rotates, the two worm wheels 54 will rotate in opposite directions. Thus, when the worm wheels 54 rotate, the connecting sleeve 58 will rotate synchronously. A semi-circular cutter 59 is fixed to the outer end of the connecting sleeve 58. Therefore, the two semi-circular cutters 59 will rotate in opposite directions with the connecting sleeve 58. When the cutting edges of the blades 593 of the two semi-circular cutters 59 rotate to the contact position, a "scissor closing" action is formed, generating a shearing force on the edge of the mother plate 6. Through the movement of the mother plate 6, the upper and lower blades 593 cut the edge strip 7 from the mother plate 6.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flame-retardant polyethylene mother sheet trimming device for automotive interior production, comprising a rack (1), support rollers (2) are respectively installed on the top surface of the left and right of the rack (1), the two ends of the support rollers (2) are installed with the rack (1) through bearing seats, characterized in that, The frame (1) has support seats (3) installed at the front and back in the middle. Two connecting rods (4) are fixed between the front and back support seats (3). Edge trimming blades (5) are installed on the two connecting rods (4). The support roller (2) is used to support and convey the mother sheet (6). The front and back edges of the mother sheet (6) are trimmed by the edge trimming blades (5) to obtain edge strips (7). The trimming blade (5) includes a transmission housing (51), a sliding sleeve (52), a tensioning bolt A (53), a worm gear (54), a worm (55), a through hole (56), a rotating hole (57), a connecting sleeve (58), and a semi-circular cutter (59). Two sliding sleeves (52) are fixed on the outside of the transmission housing (51). The sliding sleeves (52) slide along the connecting rod (4). The outer wall of the sliding sleeves (52) is threaded with a tensioning bolt A (53). The tensioning bolt A (53) abuts against the outer surface of the connecting rod (4). Worm gears (54) are installed at the upper and lower positions inside the transmission housing (51). The worm wheel (54) meshes with the worm (55). A through hole (56) is opened on the corresponding position of the connecting rod (4) on the inner side of the transmission housing (51). A rotating hole (57) corresponding to the worm (55) is opened on the outer side of the transmission housing (51). The worm (55) rotates in the rotating hole (57). A connecting sleeve (58) is welded to the outer wall of the worm wheel (54). The connecting sleeve (58) passes through the through hole (56) and is located on the outside of the transmission housing (51). The worm wheel (54) and the connecting sleeve (58) are sleeved on the connecting rod (4). A semi-circular cutter (59) is fixed at the outer end of the connecting sleeve (58).

2. The edge-cutting device for flame-retardant polyethylene masterbatch used in automotive interior production according to claim 1, characterized in that, The semicircular cutter (59) includes a semicircular ring A (591), a semicircular ring B (592), a blade (593), and a tensioning bolt B (594). The semicircular ring A (591) and the semicircular ring B (592) are bolted together to form a complete ring structure that is fitted onto the connecting sleeve (58). A semicircular blade (593) is fixed to the outside of the semicircular ring A (591). The tensioning bolt B (594) is threadedly connected to the outer wall of the semicircular ring B (592). The inner side of the tensioning bolt B (594) abuts against the outer wall of the connecting sleeve (58).

3. The edge-cutting device for flame-retardant polyethylene masterbatch used in automotive interior production according to claim 1, characterized in that, The support base (3) includes a rectangular shell (31), a sliding plate (32), mounting holes (33), and a tensioning bolt C (34). The bottom of the support base (3) is a rectangular shell (31), which is hollow and is fixed to the frame (1) by bolts. The sliding plate (32) is located above the rectangular shell (31) and is vertically slidably connected inside the rectangular shell (31). Two mounting holes (33) are penetrating the sliding plate (32). The connecting rod (4) is installed in the mounting holes (33). The rectangular shell (31) is threaded with a tensioning bolt C (34), and the inner end of the tensioning bolt C (34) abuts against the outer surface of the sliding plate (32).

4. The edge-cutting device for flame-retardant polyethylene masterbatch used in automotive interior production according to claim 1, characterized in that, A screw wheel (551) is fixed to the outer end of the worm (55).

5. The edge-cutting device for flame-retardant polyethylene masterbatch used in automotive interior production according to claim 2, characterized in that, The connecting sleeve (58) has an installation groove (581), and the semi-circular ring A (591) and semi-circular ring B (592) are fitted into the installation groove (581).

6. The edge-cutting device for flame-retardant polyethylene masterbatch used in automotive interior production according to claim 3, characterized in that, The outer surface of the slide plate (32) is engraved with anti-slip texture (35) in the vertical direction, and the tensioning bolt C (34) abuts against the anti-slip texture (35).

7. The edge-cutting device for flame-retardant polyethylene masterbatch used in automotive interior production according to claim 3, characterized in that, The connecting rod (4) has an annular groove (36) at its outer end, and the sliding plate (32) has a retaining spring (37) on its outer side. The retaining spring (37) is fastened in the groove (36) to restrict the axial movement of the connecting rod (4).

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