Cylinder cloth cutting and unfolding device

Abstract

The utility model discloses a cylinder cloth cutting and unfolding device which comprises a machine frame, a sectioning knife, a cloth opening traction device and a cloth distributing and unfolding assembly are sequentially arranged on the machine frame in the front-back direction, and the sectioning knife is located below cylinder cloth moving from front to back. The cloth distributing and spreading assembly comprises a plurality of cloth spreading rollers arranged front and back at intervals, a horizontally-arranged distributing plate, a cloth guiding roller and a plurality of spreading rollers, the distributing plate is located above the cloth spreading rollers, and a gap equal to the thickness of the barrel cloth is formed between the lower surface of the distributing plate and the tops of the cloth spreading rollers. According to the cloth spreading device, the lower half breadth of the cylindrical cloth is cut, so that the cylindrical cloth cannot fall off from the distribution plate in the cloth spreading and distribution processes, the cloth spreading device is suitable for high-speed cloth spreading operation of the cylindrical cloth, the mode that the cloth spreading roller and the distribution plate correspond to each other up and down is adopted, the friction force between the cloth spreading roller and the cylindrical cloth in the distribution process is reduced, and the distribution efficiency is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of PVC calendered artificial leather production, and particularly relates to a tube cloth cutting and unfolding device. Background Art

[0002] PVC calendered artificial leather is made of PVC rubber and base fabric (also called bottom fabric) compounded. The artificial leather bottom fabric is mainly knitted tube cloth. During production, the middle of the tube cloth purchased on the market must be coated with a 10cm wide sizing strip by the sizing wheel roller, and a 0.8cm wide non-sizing area is left in the middle of the sizing strip (the blank area is easy to cut). The 10cm wide sizing strip (commonly known as small sizing due to its narrow width) is dried with hot air, and the sizing strip becomes hard and straight (conducive to flattening during calendering and compounding). The slitting knife slits the tube cloth from the 0.8cm wide non-sizing area, and separates the cloth through the distribution rack (the sizing strip is spread out to the edges of the two sides of the width, so it is commonly known as small sizing edge). After the spreading roller spreads it, it is rolled into a cloth roll by a winder. This processing technology for the tube cloth is called cloth opening sizing technology, and there is a special production line called cloth opening sizing production line. This traditional production line has low production efficiency and cannot achieve high-speed production. The main reasons are as follows: the sizing wheel sizing from the front side of the tube cloth, and after turning 90 degrees, the sizing strip turns to the top, so that the hot air nozzle, cooling fan and cloth cutting knife are also adapted to be on the top of the tube cloth. After the cloth cutting knife cuts the tube cloth, the tube cloth wraps around the distribution support on the distribution rack from the bottom, and the left small sizing edge of the sizing strip wraps (hooks) the left distribution support from the inside of the left distribution support, and the right small sizing edge wraps (hooks) the right distribution support from the inside of the right distribution support. In this distribution method, because the cutting opening of the tube cloth is on the top, the left small sizing edge and the right small sizing edge are easy to slide off the distribution supports on the left and right sides. Therefore, the conveying speed of the tube cloth cannot be too fast (if the speed is fast, the tension will be unstable during the unfolding of the cloth, and the cloth edge will slide off the distribution support in an instant). Therefore, it is urgent to improve the existing cutting knife position and distribution flattening mechanism. Utility Model Content

[0003] The utility model aims to solve the above technical problems and provides a tube cloth cutting and unfolding device which can prevent the tube cloth from falling off from the distribution support after cutting and can improve the tube cloth conveying speed.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: a tube cloth cutting and unfolding device, comprising a frame, on which a cutting knife, a cloth opening traction device and a distribution and spreading assembly are arranged in sequence along the front-to-back direction, and the cutting knife is located below the tube cloth moving from front to back; the distribution and spreading assembly comprises a plurality of spreading rollers arranged at intervals in front and back, a horizontally arranged distribution plate, a cloth guide roller and a plurality of flattening rollers, the distribution plate is located above the plurality of spreading rollers, and a gap equivalent to the thickness of the tube cloth is provided between the lower surface of the distribution plate and the top of the spreading roller, the distribution plate is an isosceles trapezoidal structure that is narrow in front and wide in the back, the front side of the distribution plate is suspended, and the middle of the bottom rear end of the distribution plate is fixed on the frame, the plurality of flattening rollers are located on the rear side of the distribution plate, the cloth guide roller is arranged at a position lower than the flattening roller and the distribution plate, and the plurality of flattening rollers are arranged at intervals in the front-to-back direction.

[0005] There are three spreading rollers and three flattening rollers, and rubber sleeves are arranged on the outer circles of the three spreading rollers. Two spiral grooves with opposite rotation directions are symmetrically distributed on the outer circle surface of the rubber sleeves. The spiral angles of the two spiral grooves on the outer circle of the same rubber sleeve are equal, and the spiral angles of the spiral grooves of the three rubber sleeves gradually decrease from front to back.

[0006] The distribution plate includes an upper flat plate and a lower flat plate which correspond to each other and are isosceles trapezoidal. The bottom surface of the upper flat plate and the top surface of the lower flat plate are connected by a plurality of supporting steel sections. The surrounding edges of the upper flat plate and the lower flat plate are connected by a bent distribution circular tube which is connected end to end. The distance between the top surface of the upper flat plate and the bottom surface of the lower flat plate is equal to the outer diameter of the distribution circular tube.

[0007] By adopting the above technical scheme, the specific working process of the utility model is as follows: when the tube cloth is transported from front to back on the cloth guide support to the cutting knife, the cutting knife cuts the non-sizing area of ​​about 0.8 cm in the middle of the pulp strip on the bottom surface of the tube cloth, and the cloth opening traction device transports the cut tube cloth backward to the distribution and spreading assembly, and the spreading roller spreads the left and right sides of the cut bottom surface of the tube cloth outward, so that the tube cloth is easier to put on the distribution plate which is narrow in front and wide in the back, reducing the friction between the distribution circular tubes on the left and right sides of the distribution plate and the inner wall of the tube cloth, and the tube cloth is spread out to the distribution and distribution plates on the left and right sides by the spreading roller until only the small pulp edge is wrapped on the left and right sides of the rear end of the distribution plate, and then passes through the cloth guide roller, and then passes through multiple flattening rollers to flatten the cloth and then is rolled into a cloth roll by the winder, completing the cloth opening and sizing operation of the tube cloth.

[0008] The rubber sleeve on the outer circle of the spreading roller is provided with spiral grooves with opposite rotation directions. When the spreading roller rotates, the spiral groove on the left pushes the left side of the tube cloth to the left, and the spiral groove on the right pushes the right side of the tube cloth to the right. The spiral angles of the spiral grooves of the three rubber sleeves gradually decrease from front to back, because as the left and right sides of the lower side of the tube cloth are spread, the contact surface with the rubber sleeve gradually becomes smaller, and the friction force gradually decreases. Therefore, the left or right thrust of the rubber sleeve on the edge of the tube cloth also gradually decreases, so that the force on the front, middle and rear tube cloths during the distribution process remains basically consistent.

[0009] The supporting steel set between the upper plate and the lower plate of the distribution plate plays the role of connecting the upper plate and the lower plate, ensuring that the distribution plate of the front cantilever structure has good strength and stability. The setting of the bent distribution round tube makes the tube cloth smooth and without angular obstruction during the unfolding process, ensuring smooth spreading and protecting the cloth from damage.

[0010] There is a gap between the bottom of the lower plate and the top of the spreading roller that is equivalent to the thickness of the cloth tube, so that there is a certain friction between the spreading roller and the bottom of the cloth tube. After the cut cloth tube is spread out through the distribution plate, it is flattened to a horizontal state through multiple flattening rollers, which is convenient for winding.

[0011] In summary, the utility model cuts the lower half of the cloth tube so that it will not fall off the distribution plate during the spreading and distribution process, which is suitable for high-speed cloth opening operations of the cloth tube. The spreading roller and the distribution plate cooperate with each other up and down, which reduces the friction with the cloth tube during the distribution process and improves the distribution efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 yes Figure 1 Side view of the middle spreading roller;

[0014] Figure 3 yes Figure 1 A top view of the central distribution plate;

[0015] Figure 4 yes Figure 3 EE section view. DETAILED DESCRIPTION

[0016] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0017] like Figure 1-Figure 4As shown, the tube cloth cutting and unfolding device of the utility model comprises a frame 1, on which a slitting knife 2, a cloth opening traction device 3 and a distribution and spreading assembly are arranged in sequence along the front-to-back direction, the slitting knife 2 is located below the tube cloth moving from front to back; the distribution and spreading assembly comprises a plurality of spreading rollers 66 arranged at intervals in front and back, a horizontally arranged distribution plate 67, a cloth guide roller 65 and a plurality of flattening rollers 68, the distribution plate 67 is located above the plurality of spreading rollers 66, a gap equivalent to the thickness of the tube cloth is provided between the lower surface of the distribution plate 67 and the top of the spreading roller 66, the distribution plate 67 is an isosceles trapezoidal structure with a narrow front and wide rear, the front side of the distribution plate 67 is suspended, the middle of the bottom of the rear end of the distribution plate 67 is fixed on the frame 1, the plurality of flattening rollers 68 are located at the rear side of the distribution plate 67, the cloth guide roller 65 is arranged at a position lower than the flattening roller 68 and the distribution plate 67, and the plurality of flattening rollers 68 are arranged at intervals along the front-to-back direction. The slitting knife 2 and the cloth opening traction device 3 are existing equipment, and the specific structure is not repeated.

[0018] There are three spreading rollers 66 and three flattening rollers 68, and rubber sleeves 69 are provided on the outer circles of the three spreading rollers 66. Two spiral grooves 70 with opposite rotation directions are symmetrically distributed on the outer circle surface of the rubber sleeves 69. The spiral angles of the two spiral grooves 70 on the outer circle of the same rubber sleeve 69 are equal, and the spiral angles of the spiral grooves 70 of the three rubber sleeves 69 gradually decrease from front to back.

[0019] The distribution plate 67 includes an upper flat plate 71 and a lower flat plate 72 which correspond to each other and are isosceles trapezoidal. The bottom surface of the upper flat plate 71 and the top surface of the lower flat plate 72 are connected by a plurality of supporting steel sections 73 (channel steels). The surrounding edges between the upper flat plate 71 and the lower flat plate 72 are connected by a bent distribution circular tube 74 which is connected end to end. The distance between the top surface of the upper flat plate 71 and the bottom surface of the lower flat plate 72 is equal to the outer diameter of the distribution circular tube 74.

[0020] The specific working process of the utility model is as follows: when the tube cloth 75 is transported from front to back on the cloth guide support to the cutting knife 2, the cutting knife 2 cuts the non-sizing area of ​​about 0.8 cm in the middle of the pulp strip on the bottom surface of the tube cloth 75, and the cloth opening traction device 3 transports the cut tube cloth 75 backward to the distribution and spreading assembly, and the spreading roller 66 spreads the left and right sides of the bottom surface of the tube cloth 75 outward after cutting, so that the tube cloth 75 is easier to put on the distribution plate 67 which is narrow in front and wide in the back, and reduces the friction between the distribution circular tubes 74 on the left and right sides of the distribution plate 67 and the inner wall of the tube cloth 75, and the tube cloth 75 is spread to the distribution and distribution plates 67 on the left and right sides by the spreading roller 66 until only the small pulp edge is wrapped on the left and right sides of the rear end of the distribution plate 67, and then passes through the cloth guide roller 65, and then passes through a plurality of flattening rollers 68 to flatten the cloth and then is rolled into a cloth roll by the winder, completing the cloth opening and sizing operation of the tube cloth 75.

[0021] The rubber sleeve 69 on the outer circumference of the spreading roller 66 is provided with spiral grooves 70 with opposite rotation directions. When the spreading roller 66 rotates, the spiral groove 70 on the left pushes the left side of the tube cloth 75 to the left and the spiral groove 70 on the right pushes the right side of the tube cloth 75 to the right. The spiral angles of the spiral grooves 70 of the three rubber sleeves 69 gradually decrease from front to back, because as the left and right sides of the lower side of the tube cloth 75 are spread, the contact surface with the rubber sleeve 69 gradually becomes smaller, and the friction force gradually decreases. Therefore, the leftward or rightward thrust of the rubber sleeve 69 on the edge of the tube cloth 75 also gradually decreases, so that the forces on the front, middle and rear tube cloth 75 are basically consistent during the distribution process.

[0022] The support steel 73 disposed between the upper plate 71 and the lower plate 72 of the distribution plate 67 serves to connect the upper plate 71 and the lower plate 72, ensuring that the distribution plate 67 of the front cantilever structure has good strength and stability. The arrangement of the bent distribution circular tube 74 allows the tube cloth 75 to be smooth and free of angular obstructions during the unfolding process, ensuring smooth unfolding and preventing the cloth from being damaged.

[0023] There is a gap between the bottom surface of the lower plate 72 and the top of the spreading roller 66 that is equivalent to the thickness of the tube cloth 75, so that there is a certain friction between the spreading roller 66 and the bottom surface of the tube cloth 75. After the cut tube cloth 75 is spread out by the distribution plate 67, it is flattened to a horizontal state by a plurality of flattening rollers 68, which is convenient for winding.

[0024] The above embodiments illustrate the basic principles and features of the utility model, but the above only illustrates the preferred embodiments of the utility model and is not limited by the embodiments. Under the inspiration of this patent, ordinary technicians in this field can also make many forms of deformation and improvement without departing from the purpose of the utility model and the scope of protection of the claims, which are all within the scope of protection of the utility model. Therefore, the patent and protection scope of the utility model shall be subject to the attached claims.

Claims

1. The tube cloth cutting and unfolding device is characterized by: It comprises a frame, on which a cutting knife, a cloth opening traction device and a distribution and spreading assembly are arranged in sequence along the front-to-back direction, the cutting knife is located below the tube cloth moving from front to back; the distribution and spreading assembly comprises a plurality of spreading rollers arranged at intervals in front and back, a horizontally arranged distribution plate, a cloth guide roller and a plurality of flattening rollers, the distribution plate is located above the plurality of spreading rollers, a gap equivalent to the thickness of the tube cloth is provided between the lower surface of the distribution plate and the top of the spreading roller, the distribution plate is an isosceles trapezoidal structure which is narrow in front and wide in back, the front side of the distribution plate is suspended, the middle of the bottom rear end of the distribution plate is fixed on the frame, a plurality of flattening rollers are located on the rear side of the distribution plate, the cloth guide roller is arranged at a position lower than the flattening roller and the distribution plate, and the plurality of flattening rollers are arranged at intervals in the front-to-back direction.

2. The tube cloth cutting and unfolding device according to claim 1, characterized in that: There are three spreading rollers and three flattening rollers, and rubber sleeves are arranged on the outer circles of the three spreading rollers. Two spiral grooves with opposite rotation directions are symmetrically distributed on the outer circle surface of the rubber sleeves. The spiral angles of the two spiral grooves on the outer circle of the same rubber sleeve are equal, and the spiral angles of the spiral grooves of the three rubber sleeves gradually decrease from front to back.

3. The tube cloth cutting and unfolding device according to claim 1 or 2, characterized in that: The distribution plate includes an upper flat plate and a lower flat plate which correspond to each other and are isosceles trapezoidal. The bottom surface of the upper flat plate and the top surface of the lower flat plate are connected by a plurality of supporting steel sections. The surrounding edges of the upper flat plate and the lower flat plate are connected by a bent distribution circular tube which is connected end to end. The distance between the top surface of the upper flat plate and the bottom surface of the lower flat plate is equal to the outer diameter of the distribution circular tube.

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