A cutting device for rubber sheet of automobile sealing strip production raw material

Abstract

The application discloses a kind of automobile sealing strip production raw material rubber sheet cutting device, including platform, and the upper portion of platform is equipped with cylinder, and multiple sawtooth knives are uniformly distributed on the outer edge surface of cylinder;The cam is arranged below the platform, and the cam is connected with the cylinder by belt drive, so that the cylinder rotates the angle between adjacent two sawtooth knives while the cam rotates a circle;First through groove and second through groove are opened on the platform, and there is a fixed plate above the first through groove and the second through groove;There is a first pressing block in the first through groove, and there is a second pressing block in the second through groove;The first pressing block and the second pressing block are sequentially and independently moved downward to separate from the rubber sheet after the cam rotates a circle, and then reset to continue extruding the rubber sheet;The rotation of the cylinder makes the sawtooth knife insert into the rubber sheet and pull the rubber sheet, so that the rubber sheet is tensioned and curled on the outer edge of the cylinder;There is a shearing knife above the cylinder for shearing the tensioned rubber sheet;There is a discharging basket above the fixed plate, and the application solves the problems of poor cutting effect and more debris of the rubber sheet with soft texture.

Description

Technical Field

[0001] This invention belongs to the field of automotive sealing strip production, and particularly relates to a cutting device for rubber sheets, a raw material for automotive sealing strip production. Background Technology

[0002] In the manufacturing process of automotive sealing strips, rubber sheets are first cut into strips and then refined. Due to the high elasticity of rubber, when cutting relatively soft rubber sheets, if the existing technology of stamping cutting with a blade moving up and down is used, the rubber sheet is prone to deformation when the blade contacts the rubber, causing the cutting position to shift. This affects the uniformity of the rubber end cut by the cutting blade. At the same time, the stamping method generates more rubber debris when the blade is squeezed against the rubber, resulting in poor rubber cutting effect and affecting cutting efficiency. If a sawing method with a blade moving back and forth is used, the rubber sheet may move with the blade under the action of friction, making it impossible to cut the rubber sheet. Even if a sharper blade is used or the rubber sheet is fixed to form a cut, the back and forth deformation at the point of contact between the blade and the rubber cannot be avoided, which affects the uniformity of the rubber end cut by the cutting blade. Not only is the cutting effect poor, but more rubber debris is also generated and adheres to the blade. In addition, when cutting rubber sheets using the above methods, one side of the rubber sheet to be cut is in a free state, which easily leads to edge curling, affecting the cutting. Summary of the Invention

[0003] The purpose of this invention is to provide a cutting device for rubber sheets used in the production of automotive sealing strips, in order to solve the problems of poor cutting effect and excessive debris when cutting soft rubber sheets.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rubber sheet cutting device for automotive sealing strip production includes a platform with a rotating cylinder above it. Multiple serrated blades are evenly distributed around the outer circumference of the cylinder. A rotating cam is located below the platform, connected to the cylinder via a belt drive. As the cam rotates one revolution, the cylinder rotates at the angle between two adjacent serrated blades. The platform has a first and a second vertically arranged slot from left to right. An inverted U-shaped fixing plate is inverted above the first and second slots. A first pressure block that can move up and down is located in the first slot, and a second pressure block that can move up and down is located in the second slot. A rubber sheet is placed between the fixing plate and the pressure blocks from left to right, with the pressure blocks pressing upwards to fix the rubber sheet. As the cam rotates one revolution, the first and second pressure blocks move downwards independently, detaching from the rubber sheet, and then return to their original positions to continue pressing the rubber sheet. The rotation of the cylinder causes the serrated blades to insert into and pull the rubber sheet, causing it to stretch and curl around the outer edge of the cylinder. A reciprocating shearing blade is located above the cylinder to cut the stretched rubber sheet. An upward-opening material dropper is located above the fixing plate.

[0006] As a further description of the above technical solution:

[0007] The platform has two first support rods fixed symmetrically at the front and back on the upper surface. A rotating shaft is fixed coaxially on the cylinder. The two ends of the rotating shaft are rotatably connected to the first support rods on the corresponding sides via bearings. The platform has two second support rods fixed symmetrically at the front and back on the lower surface. A camshaft is fixed coaxially on the cam. The two ends of the camshaft are rotatably connected to the second support rods on the corresponding sides via bearings.

[0008] As a further description of the above technical solution:

[0009] The front end of the rotating shaft is fixed with a first pulley, and the front end of the camshaft is fixed with a second pulley. The first pulley and the second pulley are connected by a belt.

[0010] As a further description of the above technical solution:

[0011] The rear end of the camshaft is connected to a first motor, which drives the camshaft to rotate, and drives the cylinder to rotate via belt transmission.

[0012] As a further description of the above technical solution:

[0013] An extension rod is fixed on the first support rod located at the rear. A U-shaped blade holder is fixed on one side of the extension rod. The blade holder has left and right through holes. A hinge shaft is fixed at the rear end of the shearing blade. The two ends of the hinge shaft are respectively placed in the through holes to form a hinge. A second motor is connected to the left end of the hinge shaft. The second motor is fixed to the upper end of the extension rod.

[0014] As a further description of the above technical solution:

[0015] The cam is composed of a first cam and a second cam that are fixed together and arranged in a front-to-back manner; the first cam and the second cam are exactly the same in shape and size and rotate on the same axis, with an angle of 180 degrees between the first cam and the second cam.

[0016] As a further description of the above technical solution:

[0017] A first wedge is fixed to the front side of the lower end face of the first pressure block, and a second wedge is fixed to the rear side of the lower end face of the second pressure block. The lower end faces of the first and second wedges are both inclined surfaces tilted to the right and downward. A housing with an opening facing right is fixed to the lower end face of the platform and is located below the first and second through slots. Inside the housing is a first slider that moves left and right and is located below the first wedge. A first extrusion block is fixed to the left side of the upper end face of the first slider, and a first spring is located at the left end of the first slider. A second slider that moves left and right and is located below the second wedge is located behind the first slider. A second extrusion block is fixed to the right side of the upper end face of the second slider, and a second spring is located at the left end of the second slider. The first cam, the first pressure block, the first slider, and the first extrusion block are all located in the same plane. The second cam, the second pressure block, the second slider, and the second extrusion block are all located in the same plane.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] (1) The present invention uses a cylindrical rotation to drive a serrated blade to pull the rubber sheet, making the relatively soft rubber sheet taut and tough. Then, it is cut into strips by shearing. The cutting position of the rubber strip will not move or deform with the blade. The cut surface of the rubber strip is smooth and uniform with good effect and no debris is generated.

[0020] (2) In this invention, the rubber sheet is rolled up on the outer edge of the cylinder, so that the rubber sheet is in a taut and resilient state before shearing. The cylinder rotates at the same angle each time, and the shearing is uniform, which ensures the consistency of the rubber strip.

[0021] (3) In this invention, the rubber sheet placed on the left side of the shearing blade is in a relaxed state because its left edge is cut off and becomes a free end. The rubber sheet placed on the right side of the shearing blade is still in a tense and resilient state after being inserted and fixed by two adjacent serrated blades. Therefore, the position of each cut by the shearing blade is a rubber sheet in a tense and resilient state, which ensures the cutting quality while avoiding the situation where the rubber sheet curls and affects the cutting. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is the front view of the present invention;

[0024] Figure 3 This is a top view of the present invention;

[0025] Figure 4 for Figure 3 Sectional view of AA;

[0026] Figure 5 for Figure 4 Enlarged view of part B in the middle;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of platform 1;

[0028] Figure 7 A three-dimensional structural diagram of cylinder 2 and serrated blade 3;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the cam;

[0030] Figure 9 This is a three-dimensional structural diagram of the shearing blade 10;

[0031] Figure 10 A three-dimensional structural diagram illustrating the positional relationship between each extrusion block and slider;

[0032] Figure 11 A three-dimensional structural diagram illustrating the positional relationships of each pressure block and wedge block;

[0033] Figure 12 This is a three-dimensional structural diagram of the interaction between the cam, the extrusion block, the slider, the pressure block, and the wedge block. The diagram shows the state in which the first cam 25 extrudes the first extrusion block 31 to the left, and the first pressure block 6 and the first wedge block 27 move downward.

[0034] Figure 13 This is a three-dimensional structural diagram of the interaction between the cam, the extrusion block, the slider, the pressure block, and the wedge block. The diagram shows the state in which the second cam 26 extrudes the second extrusion block 34 to the left, and the second pressure block 7 and the second wedge block 28 move downward. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-13 This invention provides a technical solution for a cutting device for rubber sheets used in the production of automotive sealing strips:

[0037] A cutting device for rubber sheets used in automotive sealing strip production includes a platform 1, a rotating cylinder 2 on top of the platform 1, and multiple serrated blades 3 evenly distributed around the outer edge of the cylinder 2; a rotating cam below the platform 1, connected to the cylinder 2 via a belt 18, such that the cylinder 2 rotates by the angle between two adjacent serrated blades 3 as the cam rotates one revolution; the platform 1 has a first through groove 4 and a second through groove 8 arranged vertically from left to right, and a fixed plate 5 with an inverted U-shaped cross-section is invertedly fastened above the first through groove 4 and the second through groove 8; a first pressure block 6 that can move up and down is provided in the first through groove 4. The second through groove 8 is provided with a second pressure block 7 that can move up and down. The rubber sheet 9 is placed between the fixed plate 5 and the pressure block from left to right, and the pressure block presses the rubber sheet 9 upward to fix the rubber sheet 9. The cam rotates one revolution to make the first pressure block 6 and the second pressure block 7 move downward independently in sequence to get away from the rubber sheet 9 and then return to their original positions to continue pressing the rubber sheet 9. The cylinder 2 rotates to make the serrated blade 3 insert into the rubber sheet 9 and pull the rubber sheet 9, so that the rubber sheet 9 is taut and curled on the outer edge of the cylinder 2. A reciprocating shearing blade 10 is provided above the cylinder 2 to cut the taut rubber sheet 9. A material drop basket 11 with an upward opening is provided above the fixed plate 5.

[0038] The platform 1 has two first support rods 12 fixed on its upper end face, which are symmetrically arranged. A rotating shaft 13 is fixed on the cylinder 2, and the two ends of the rotating shaft 13 are rotatably connected to the first support rod 12 on the corresponding side via bearings. The platform 1 has two second support rods 14 fixed on its lower end face, which are symmetrically arranged. A camshaft 15 is fixed on the cam, and the two ends of the camshaft 15 are rotatably connected to the second support rod 14 on the corresponding side via bearings.

[0039] A first pulley 16 is fixed to the front end of the rotating shaft 13, and a second pulley 17 is fixed to the front end of the camshaft 15. The first pulley 16 and the second pulley 17 are connected by a belt 18.

[0040] The rear end of the camshaft 15 is connected to a first motor 19, which drives the camshaft 15 to rotate, and drives the cylinder 2 to rotate via the belt 18.

[0041] An extension rod 20 is fixed on the first support rod 12 located at the rear. A U-shaped blade holder 21 is fixed on one side of the extension rod 20. The blade holder 21 has left and right through holes 22. A hinge shaft 23 is fixed at the rear end of the shearing blade 10. The two ends of the hinge shaft 23 are respectively placed in the through holes 22 to form a hinge. A second motor 24 is connected to the left end of the hinge shaft 23. The second motor 24 is fixed to the upper end of the extension rod 20.

[0042] The cam is composed of a first cam 25 and a second cam 26 that are fixed together and arranged in a front-to-back manner; the first cam 25 and the second cam 26 have the same shape and size and rotate on the same axis, and the angle between the first cam 25 and the second cam 26 is 180 degrees.

[0043] A first wedge 27 is fixed to the front side of the lower end face of the first pressure block 6, and a second wedge 28 is fixed to the rear side of the lower end face of the second pressure block 7. The lower end faces of the first wedge 27 and the second wedge 28 are both inclined surfaces tilted to the right and downward. A housing 29 with an opening facing right is fixed to the lower end face of the platform 1 and is located below the first through groove 4 and the second through groove 8. Inside the housing 29 is a first slider 30 that moves left and right and is located below the first wedge 27. A first extrusion block 31 is fixed to the left side of the upper end face of the first slider 30, and a first spring 32 is located at the left end of the first slider 30. A second slider 33 that moves left and right and is located below the second wedge 28 is located at the rear side of the first slider 30. A second extrusion block 34 is fixed to the right side of the upper end face of the second slider 33, and a second spring is located at the left end of the second slider 33. The first cam 25, the first pressure block 6, the first slider 30, and the first extrusion block 31 are all located in the same plane. The second cam 26, the second pressure block 7, the second slider 33, and the second extrusion block 34 are all located in the same plane.

[0044] Working principle:

[0045] The first motor 19 and the second motor 24 used in this invention are both stepper motors. Before use, they need to be adjusted so that the first motor 19 rotates once and then pauses for a period of time. During the time interval when the first motor 19 stops rotating, the second motor 24 rotates forward and backward once and pauses for a period of time. During the time interval when the second motor 24 stops rotating, the first motor 19 rotates once, and so on.

[0046] During operation, a rubber sheet 9 is conveyed onto platform 1 via a conveyor on the left side of platform 1. The rubber sheet 9 is placed to the left of the first pressure block 6. The first motor 19 drives the first cam 25 to rotate via the camshaft 15. The first cam 25 pushes the first slider 30 to move to the left and compresses the first spring 32. The first extrusion block 31 moves to the left with the first slider 30 and disengages from the first wedge block 27. The first wedge block 27 loses its support. Under the action of gravity, the first wedge block 27 and the first pressure block 6 move downward. The rubber sheet 9 is placed below the fixed plate 5 from left to right. At this time, the rubber sheet 9 between the first pressure block 6 and the second pressure block 7 is in a compressed state due to the pushing action of the conveyor. The camshaft 15 drives the first cam 25 to continue rotating and no longer pushes the first slider 30. The first spring 32 resets and pushes the first slider 30 to move to the right. The first extrusion block 31 moves to the right with the first slider 30 and squeezes the inclined surface of the first wedge block 27, causing the first wedge block 27 and the first pressure block 6 to move upward. The first pressure block 6 squeezes the rubber sheet 9 upward and fixes the rubber sheet 9 above the first pressure block 6.

[0047] The camshaft 15 continues to rotate and drives the second cam 26 to push the second slider 33 to the left and compress the second spring. The second extrusion block 34 moves to the left with the second slider 33 and disengages from the second wedge block 28. The second wedge block 28 loses its support. Under the action of gravity, the second wedge block 28 and the second pressure block 7 move downward. The rubber sheet 9 returns from the compressed state to the relaxed state under its own elastic force and extends to the right. The right end of the rubber sheet 9 is placed between the fixed plate 5 and the second pressure block 7 from left to right. The camshaft 15 drives the second cam 26 to continue to rotate and no longer pushes the second slider 33. The second spring returns to its original position and pushes the second slider 33 to the right. The second extrusion block 34 moves to the right with the second slider 33 and squeezes the inclined surface of the two wedge blocks 28, causing the two wedge blocks 28 and the second pressure block 7 to move upward. The second pressure block 7 squeezes the rubber sheet 9 upward and fixes the rubber sheet 9 above the second pressure block 7.

[0048] When the camshaft 15 drives the first cam 25 to rotate, it pushes the first slider 30 to move to the left again. The first pressure block 6 moves downward, and the rubber sheet 9 is compressed to the right again under the pushing action of the conveyor. The above process is repeated. The first pressure block 6 squeezes the rubber sheet 9 upward and fixes the rubber sheet 9 above the first pressure block 6. The second pressure block 7 moves downward, and the rubber sheet 9 returns to the relaxed state from the compressed state under its own elastic force and extends to the right. The rubber sheet 9 moves to the right step by step until the length of the rubber sheet 9 extending to the right is long enough so that the serrated blade 3 can be inserted into the rubber sheet 9 when the cylinder 2 rotates.

[0049] As the cylinder 2 continues to rotate, the serrated blade 3 stretches the rubber sheet 9 to the right. As the rubber sheet 9 gradually moves to the right and becomes longer, the cylinder 2 continues to rotate, causing the stretched rubber sheet 9 to curl around the outer edge of the cylinder 2. Multiple serrated blades 3 are inserted into the rubber sheet 9, and the stretched rubber sheet 9 is fixed to the outer edge of the cylinder 2.

[0050] It is worth noting that the process of the rubber sheet 9 moving to the right can be divided into two situations. One is that when the material is being fed, the power for the rubber sheet 9 to move to the right gradually comes from the thrust of the conveyor belt conveying to the right. The other is that after the material is being fed, the power for the rubber sheet 9 to move to the right gradually comes from the rightward pulling of the serrated blade 3 because the rubber sheet 9 is stretched.

[0051] After the rubber sheet 9 is stretched and curled around the outer edge of the cylinder 2, as the cylinder 2 continues to rotate, the rubber sheet 9 is positioned at the shearing blade 10. Since the first motor 19 drives the rotating shaft 13 via the camshaft 15, the first pulley 16, and the second pulley 17, thereby driving the cylinder 2 to rotate, a reasonable transmission ratio can be used to achieve the desired angle between two adjacent saw blades 3 as the cylinder 2 rotates one revolution of the camshaft 15. Furthermore, since the first motor 19 rotates one revolution and then pauses for a period of time, during which the second motor 24 reverses direction once and pauses for a period of time, during which the first motor 19 rotates one revolution, and so on, the cylinder 2 rotates the angle between two adjacent saw blades 3 each time, pauses for a period of time, and then rotates the angle between two adjacent saw blades 3 again, and so on. The angle of the cylinder 2 is adjusted at the initial position, placing one of the saw blades 3 at the position of the shearing blade 10. At a position slightly to the left of the bottom, with the blades of both blades in the same vertical plane, during the time interval when the first motor 19 stops rotating, the second motor 24 drives the shearing blade 10 to rotate downwards. The shearing blade 10 and the serrated blade 3 form a shearing action, cutting the taut and resilient rubber sheet 9 into strips from back to front. The second motor 24 then drives the shearing blade 10 to rotate upwards and reset. It is worth noting that the rubber sheet 9 placed to the left of the shearing blade 10 is in a relaxed state because its left edge is cut off and is free. The rubber sheet 9 placed to the right of the shearing blade 10 is still in a taut and resilient state after being fixed by the insertion of two adjacent serrated blades 3. Therefore, the position cut by the shearing blade 10 each time is the rubber sheet 9 in a taut and resilient state. This cycle continues, and each time the shearing blade 10 rotates downwards, it cuts the next rubber strip and places it between two adjacent serrated blades 3. As the cylinder 2 rotates, the cut rubber strip is pulled to the left and falls into the material drop basket 11 above the fixed plate 5.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention, and all such substitutions or changes should be covered within the scope of protection of the present invention.

Claims

1. A cutting device for rubber sheets used as raw materials in the production of automotive sealing strips, characterized in that, The utility model provides a rubber sheet cutting device, including platform (1), the platform (1) top is equipped with a rotating cylinder (2), and the cylinder (2) outer edge surface is evenly distributed with multiple sawtooth knives (3) in circumference, and the platform (1) lower is equipped with a rotating cam, and the cam is driven connection with the cylinder (2) through the belt (18), makes the cam rotate a circle, and the cylinder (2) rotates the angle between adjacent two sawtooth knives (3) simultaneously, and the platform (1) is opened from left to right and is arranged the vertical first through slot (4) and the second through slot (8) on the top of first through slot (4) and second through slot (8) and is inverted with a fixed plate (5) of cross section inverted U shape, still be equipped with the pressing block, and the pressing block includes the first pressing block (6) and the second pressing block (7), and the first pressing block (6) is equipped with in the first through slot (4) and can move up and down, and the second pressing block (7) is equipped with in the second through slot (8) and can move up and down, and the rubber sheet (9) is from left to right and is placed between the fixed plate (5) and the pressing block, and the pressing block extrudes the rubber sheet (9) and fixes the rubber sheet (9) upwards, and the cam rotates a circle and makes the first pressing block (6) and the second pressing block (7) in turn independently move downwards and separate from the rubber sheet (9) after again reset continues extruding the rubber sheet (9), and the cylinder (2) rotates and makes the sawtooth knife (3) insert the rubber sheet (9) and pull the rubber sheet (9), and make the rubber sheet (9) tension and curl in the outer edge of cylinder (2), and the cylinder (2) top is equipped with reciprocating rotating cutting knife (10) for cutting the rubber sheet (9) of tension, and the fixed plate (5) top is equipped with the blanking basket (11) of opening upwards.

2. The cutting device for the raw rubber sheet of the automobile weather strip according to claim 1, wherein The utility model discloses a rubber sheet cutting device, including platform (1), the platform (1) top is equipped with a rotating cylinder (2), and the cylinder (2) outer edge surface is evenly distributed with multiple sawtooth knives (3) in circumference, and the platform (1) lower is equipped with a rotating cam, and the cam is driven connection with the cylinder (2) through the belt (18), makes the cam rotate a circle, and the cylinder (2) rotates the angle between adjacent two sawtooth knives (3) simultaneously, and the platform (1) is opened from left to right and is arranged the vertical first through slot (4) and the second through slot (8) on the top of first through slot (4) and second through slot (8) and is inverted with a fixed plate (5) of cross section inverted U shape, still be equipped with the pressing block, and the pressing block includes the first pressing block (6) and the second pressing block (7), and the first pressing block (6) is equipped with in the first through slot (4) and can move up and down, and the second pressing block (7) is equipped with in the second through slot (8) and can move up and down, and the rubber sheet (9) is from left to right and is placed between the fixed plate (5) and the pressing block, and the pressing block extrudes the rubber sheet (9) and fixes the rubber sheet (9) upwards, and the cam rotates a circle and makes the first pressing block (6) and the second pressing block (7) in turn independently move downwards and separate from the rubber sheet (9) after again reset continues extruding the rubber sheet (9), and the cylinder (2) rotates and makes the sawtooth knife (3) insert the rubber sheet (9) and pull the rubber sheet (9), and make the rubber sheet (9) tension and curl in the outer edge of cylinder (2), and the cylinder (2) top is equipped with reciprocating rotating cutting knife (10) for cutting the rubber sheet (9) of tension, and the fixed plate (5) top is equipped with the blanking basket (11) of opening upwards.

3. The cutting device for the raw rubber sheet of the automobile weather strip according to claim 2, wherein The utility model discloses a rubber sheet cutting device, including platform (1), the platform (1) top is equipped with a rotating cylinder (2), and the cylinder (2) outer edge surface is evenly distributed with multiple sawtooth knives (3) in circumference, and the platform (1) lower is equipped with a rotating cam, and the cam is driven connection with the cylinder (2) through the belt (18), makes the cam rotate a circle, and the cylinder (2) rotates the angle between adjacent two sawtooth knives (3) simultaneously, and the platform (1) is opened from left to right and is arranged the vertical first through slot (4) and the second through slot (8) on the top of first through slot (4) and second through slot (8) and is inverted with a fixed plate (5) of cross section inverted U shape, still be equipped with the pressing block, and the pressing block includes the first pressing block (6) and the second pressing block (7), and the first pressing block (6) is equipped with in the first through slot (4) and can move up and down, and the second pressing block (7) is equipped with in the second through slot (8) and can move up and down, and the rubber sheet (9) is from left to right and is placed between the fixed plate (5) and the pressing block, and the pressing block extrudes the rubber sheet (9) and fixes the rubber sheet (9) upwards, and the cam rotates a circle and makes the first pressing block (6) and the second pressing block (7) in turn independently move downwards and separate from the rubber sheet (9) after again reset continues extruding the rubber sheet (9), and the cylinder (2) rotates and makes the sawtooth knife (3) insert the rubber sheet (9) and pull the rubber sheet (9), and make the rubber sheet (9) tension and curl in the outer edge of cylinder (2), and the cylinder (2) top is equipped with reciprocating rotating cutting knife (10) for cutting the rubber sheet (9) of tension, and the fixed plate (5) top is equipped with the blanking basket (11) of opening upwards.

4. The cutting device for the raw rubber sheet of the automobile weather strip according to claim 2, wherein The utility model discloses a rubber sheet cutting device, including platform (1), the platform (1) top is equipped with a rotating cylinder (2), and the cylinder (2) outer edge surface is evenly distributed with multiple sawtooth knives (3) in circumference, and the platform (1) lower is equipped with a rotating cam, and the cam is driven connection with the cylinder (2) through the belt (18), makes the cam rotate a circle, and the cylinder (2) rotates the angle between adjacent two sawtooth knives (3) simultaneously, and the platform (1) is opened from left to right and is arranged the vertical first through slot (4) and the second through slot (8) on the top of first through slot (4) and second through slot (8) and is inverted with a fixed plate (5) of cross section inverted U shape, still be equipped with the pressing block, and the pressing block includes the first pressing block (6) and the second pressing block (7), and the first pressing block (6) is equipped with in the first through slot (4) and can move up and down, and the second pressing block (7) is equipped with in the second through slot (8) and can move up and down, and the rubber sheet (9) is from left to right and is placed between the fixed plate (5) and the pressing block, and the pressing block extrudes the rubber sheet (9) and fixes the rubber sheet (9) upwards, and the cam rotates a circle and makes the first pressing block (6) and the second pressing block (7) in turn independently move downwards and separate from the rubber sheet (9) after again reset continues extruding the rubber sheet (9), and the cylinder (2) rotates and makes the sawtooth knife (3) insert the rubber sheet (9) and pull the rubber sheet (9), and make the rubber sheet (9) tension and curl in the outer edge of cylinder (2), and the cylinder (2) top is equipped with reciprocating rotating cutting knife (10) for cutting the rubber sheet (9) of tension, and the fixed plate (5) top is equipped with the blanking basket (11) of opening upwards.

5. The cutting device for the raw rubber sheet of the automobile weather strip according to claim 2, wherein ​ 6. The cutting device for the raw rubber sheet of the automobile weather strip according to claim 1, wherein The cam is composed of the first cam (25) and the second cam (26) arranged in front and back and fixed together; the first cam (25) and the second cam (26) are coaxial and have the same shape and size, and the angle between the first cam (25) and the second cam (26) is 180 degrees.

7. The cutting device for the raw rubber sheet of the automobile weather strip according to claim 1, wherein The first wedge (27) is fixed on the front side of the lower end surface of the first pressing block (6), the second wedge (28) is fixed on the rear side of the lower end surface of the second pressing block (7), the lower end surfaces of the first wedge (27) and the second wedge (28) are both inclined downward to the right; the housing (29) with the opening facing right is fixed on the lower end surface of the platform (1) and is located below the first through groove (4) and the second through groove (8); the first sliding block (30) is located below the first wedge (27) and moves left and right in the housing (29); the first extrusion block (31) is fixed on the left side of the upper end surface of the first sliding block (30); the first spring (32) is located on the left end of the first sliding block (30); the second sliding block (33) moves left and right and is located below the second wedge (28) on the rear side of the first sliding block (30); the second extrusion block (34) is fixed on the right side of the upper end surface of the second sliding block (33); the second spring is located on the left end of the second sliding block (33); the first cam (25), the first pressing block (6), the first sliding block (30) and the first extrusion block (31) are located in the same plane; the second cam (26), the second pressing block (7), the second sliding block (33) and the second extrusion block (34) are located in the same plane.

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