Rotary cutter for air-cooled granulation of PVC (polyvinyl chloride) plastic

Abstract

The utility model provides a rotary cutter for air-cooled granulation of PVC plastic, which relates to the technical field of granulation equipment and comprises a connecting rod, two sides of one end of the connecting rod are provided with fixing block moving grooves, and two sides of inner cavities of the two fixing block moving grooves are provided with limiting grooves II. According to the utility model, one end of the sleeve is not embedded in the extrusion structure, so that the PVC plastic extrusion space of the extrusion structure is not occupied, and the granulation efficiency is improved; by holding the surface of a connecting rod with a hand, the thumb and the index finger are located on the surfaces of two breaking blocks correspondingly, the connecting rod is pulled towards one side of a rotating shaft, a cutter is far away from an extrusion structure, the thumb and the index finger slide the two breaking blocks, and a fixing block moves towards the interior of a fixing block moving groove under the action of a third spring after being not limited by one end of a square extrusion column; and the rotary cutter assembly can be taken down after the interior of the fixed block mounting groove is not limited by the fixed block, so that the rotary cutter assembly can be conveniently mounted and dismounted when the rotary cutter assembly is replaced.

Description

Technical Field

[0001] This utility model relates to the field of granulation equipment technology, and in particular to a rotary cutter for air-cooled granulation of PVC plastic. Background Technology

[0002] Polyvinyl chloride (PVC) is the world's second most widely used resin after polyethylene. Due to its low price, good mechanical properties, good weather resistance, good electrical insulation, and excellent geometric stability, PVC is widely used in the cable industry. A PVC air-cooled granulator is a device that processes molten thermoplastic into granular solid plastic. A rotary cutter is usually installed on the PVC air-cooled granulator to cut the PVC plastic rods extruded from the PVC air-cooled granulator.

[0003] However, in the existing technology, when using a PVC plastic air-cooled granulation machine to granulate PVC plastic, it has been found that the rotary cutter used in the PVC plastic air-cooled granulation machine will wear down and some thermoplastic will adhere to the blade after cutting PVC plastic for a long time. It is necessary to clean and replace it regularly. In some PVC plastic air-cooled granulation machines, the rotary cutter used in the PVC plastic air-cooled granulation machine is not convenient to install and disassemble. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a rotary cutter for air-cooled granulation of PVC plastic, comprising: a connecting rod, wherein fixed block moving grooves are provided on both sides of one end of the connecting rod, limit grooves are provided on both sides of the inner cavity of the two fixed block moving grooves, a square extrusion column groove is provided on one side of the two fixed block moving grooves, a square extrusion column groove is provided at the other end of the two square extrusion column grooves, a bending block groove is provided through one side of the two square extrusion column grooves, a limit column is fixedly connected to one end of the inner cavity of the two square extrusion column grooves, and auxiliary docking blocks are fixedly connected to both sides of one end of the connecting rod. Convenient disassembly and assembly components are provided inside the two fixed block moving grooves, and a rotary cutter assembly is provided on the surface of one end of the connecting rod.

[0006] In a preferred embodiment, a rotating shaft mounting groove is formed on the surface of one end of the connecting rod. A limit groove is formed on both sides of the inner cavity of the rotating shaft mounting groove. A spring is fixedly connected to one end of the inner cavity of the rotating shaft mounting groove. A rotating shaft is movably embedded inside the rotating shaft mounting groove. A limit block is fixedly connected to both sides of one end of the rotating shaft. The surfaces of the two limit blocks are movably embedded inside the two limit grooves. The other end of the spring is fixedly connected to one end of the rotating shaft. An auxiliary support rod is movably sleeved on the surface of the connecting rod. A motor is fixedly connected to the other end of the rotating shaft.

[0007] In a preferred embodiment, the easy-to-assemble and disassemble component includes a fixing block, with limit blocks two fixedly connected to the bottom of both sides of the fixing block, a triangular extrusion groove extending through one side of the fixing block, a square extrusion column movably embedded in the inner cavity of the triangular extrusion groove, and a spring three fixedly connected to the bottom end of the fixing block.

[0008] In a preferred embodiment, a limiting column movable groove is formed on the surface of the other end of the square extrusion column, a lever block is fixedly connected to the side of the fixed block, a second spring is fixedly connected to one end of the square extrusion column, the interior of the two limiting column movable grooves is movably sleeved on the surface of the two limiting columns, the interior of the two second springs is movably sleeved on the surface of the two limiting columns, the other end of the two second springs is fixedly connected to one end of the inner cavity of the two square extrusion column grooves, and the surfaces of the two lever blocks are movably embedded in the interior of the two lever block grooves.

[0009] In a preferred embodiment, the rotary cutter assembly includes a sleeve, on one end of which four cutters are fixedly connected in a circumferential manner. The other end of the sleeve has a mounting groove, on both sides of the inner cavity of the mounting groove are auxiliary docking grooves, and on the other two sides of the inner cavity of the mounting groove are fixing block mounting grooves. The inside of the mounting groove is movably fitted onto the surface of one end of the connecting rod.

[0010] In a preferred embodiment, the surfaces of the two fixed blocks are movably embedded inside the two fixed block moving grooves, the surfaces of the four limiting blocks are movably embedded inside the four limiting grooves and the two square extrusion column grooves, the surfaces of the two square extrusion columns are movably embedded inside the two square extrusion column grooves, the surfaces of the two fixed blocks are movably embedded inside the two fixed block mounting grooves, and the other ends of the two springs are fixedly connected to one end of the inner cavity of the two fixed block moving grooves.

[0011] In a preferred embodiment, the surfaces of the two auxiliary docking blocks are movably embedded inside the two auxiliary docking slots.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, one end of the rotating shaft is fixedly connected to the motor that drives the rotating cutter head in the PVC plastic air-cooled granulator. The motor is connected to an external power supply device, which is electrically connected to the motor and provides power. The motor is connected to an external controller, which is electrically connected to the motor and controls it in conjunction with the controller. The top end of the auxiliary support rod is fixedly connected to a suitable position in the PVC plastic air-cooled granulator. Under the action of a spring force, the cutter is in close contact with the extrusion structure in the PVC plastic air-cooled granulator.

[0014] 2. In this utility model, the motor is started by an external controller, and the output end of the motor drives the rotating shaft to rotate. Since the limiting block one is limited inside the limiting groove one, the connecting rod rotates with the rotating shaft, and the cutter rotates with the connecting rod to granulate the extruded PVC plastic. One end of the sleeve is not embedded in the extrusion structure, so it does not occupy the space of the extrusion structure for extruding PVC plastic, thus improving the granulation efficiency. In the initial state, the spring three is in a stretched state. By holding the surface of the connecting rod with the thumb and forefinger respectively on the surfaces of the two lever blocks and pulling the connecting rod to one side of the rotating shaft, the rotating cutter assembly moves to one side of the rotating shaft, and the cutter moves away from the extrusion structure. The spring one is deformed by force, and the thumb and forefinger... Slide the two lever blocks, and the square extrusion column moves to one side of the rotating shaft. After the fixed block loses the limit at one end of the square extrusion column, it moves into the fixed block moving groove under the action of spring three. Pull the sleeve with the other hand to move it towards the extrusion structure. After the fixed block installation groove loses the limit of the fixed block, the rotary cutter assembly can be removed. During installation, hold and pull the connecting rod and the two lever blocks, align the auxiliary docking groove with the auxiliary docking block and insert it. Release the hand holding the connecting rod, and it will return to the initial position under the action of spring two, completing the installation of the rotary cutter assembly. This design facilitates the installation and removal of the rotary cutter assembly when replacing it. Attached Figure Description

[0015] Figure 1 This utility model provides an overview schematic diagram of a rotary cutter for air-cooled granulation of PVC plastics.

[0016] Figure 2 A schematic diagram of the rotating shaft of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0017] Figure 3 A schematic diagram of one side of the connecting rod of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0018] Figure 4 A schematic diagram of a rotary cutter assembly for air-cooled granulation of PVC plastic provided by this utility model;

[0019] Figure 5A front sectional view of the connecting rod of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0020] Figure 6 A side sectional view of the connecting rod of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0021] Figure 7 A schematic diagram of point A of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0022] Figure 8 A schematic diagram showing the connection between the shaft mounting groove and the sleeve of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0023] Figure 9 A schematic diagram of the docking of the square extrusion column and the fixed block of a rotary cutter for air-cooled granulation of PVC plastic provided by this utility model;

[0024] Figure 10 This utility model provides a schematic diagram of the fixing block for a rotary cutter used in air-cooled granulation of PVC plastic.

[0025] Legend:

[0026] 1. Connecting rod; 101. Rotary shaft mounting groove; 102. Limiting groove one; 103. Spring one; 104. Rotary shaft; 105. Limiting block one; 106. Auxiliary support rod; 107. Fixed block moving groove; 108. Limiting groove two; 109. Square extrusion column groove one; 110. Square extrusion column groove two; 111. Bending block groove; 112. Limiting column; 113. Auxiliary docking block; 2. Convenient disassembly and assembly assembly; 201. Fixed block; 202. Limiting block two; 203. Triangular extrusion groove; 204. Square extrusion column; 205. Limiting column moving groove; 206. Bending block; 207. Spring two; 208. Spring three; 3. Rotary cutter assembly; 301. Sleeve; 302. Cutter; 303. Mounting groove; 304. Auxiliary docking groove; 305. Fixed block mounting groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-10This utility model provides a technical solution: a rotary cutter for air-cooled granulation of PVC plastic, comprising: a connecting rod 1, with fixed block moving grooves 107 on both sides of one end of the connecting rod 1, limit grooves 108 on both sides of the inner cavity of the two fixed block moving grooves 107, a square extrusion column groove 109 on one side of the two fixed block moving grooves 107, a square extrusion column groove 110 on the other end of the two square extrusion column grooves 109, a bending block groove 111 penetrating on one side of the two square extrusion column grooves 110, a limit column 112 fixedly connected to one end of the inner cavity of the two square extrusion column grooves 110, auxiliary docking blocks 113 fixedly connected to the other two sides of one end of the connecting rod 1, a convenient disassembly and assembly component 2 provided inside the two fixed block moving grooves 107, and a rotary cutter assembly 3 provided on the surface of one end of the connecting rod 1.

[0029] Specifically: One end of the sleeve 301 is not embedded inside the extrusion structure, thus not occupying the space for extruding PVC plastic, which improves granulation efficiency; by holding the connecting rod 1 with the thumb and forefinger respectively on the surface of the two lever blocks 206 and pulling the connecting rod 1 towards the side of the rotating shaft 104, the cutter 302 moves away from the extrusion structure, and the thumb and forefinger slide the two lever blocks 206. After the fixed block 201 loses the limit of one end of the square extrusion column 204, it moves into the inside of the fixed block moving groove 107 under the action of the spring 208. After the inside of the fixed block mounting groove 305 loses the limit of the fixed block 201, the rotary cutter assembly 3 can be removed. This design facilitates the installation and removal of the rotary cutter assembly 3 when replacing it.

[0030] In one embodiment, a rotating shaft mounting groove 101 is formed on the surface of one end of the connecting rod 1. Limiting grooves 102 are formed on both sides of the inner cavity of the rotating shaft mounting groove 101. A spring 103 is fixedly connected to one end of the inner cavity of the rotating shaft mounting groove 101. A rotating shaft 104 is movably embedded inside the rotating shaft mounting groove 101. Limiting blocks 105 are fixedly connected to both sides of one end of the rotating shaft 104. The surfaces of the two limiting blocks 105 are movably embedded inside the two limiting grooves 102. The other end of the spring 103 is fixedly connected to one end of the rotating shaft 104. An auxiliary support rod 106 is movably sleeved on the surface of the connecting rod 1. A motor (not shown in the figure) is fixedly connected to the other end of the rotating shaft 104.

[0031] Specifically: The motor is fixed in a suitable position on the PVC plastic air-cooled granulator to prevent shaking when the motor starts, which would affect the normal use of the PVC plastic air-cooled granulator; the auxiliary support rod 106 provides auxiliary support for the connecting rod 1 to prevent the connecting rod 1 from shifting during rotation; lubricating oil can be applied to the contact surfaces of the connecting rod 1 and the auxiliary support rod 106 to reduce wear.

[0032] In one embodiment, the easy-to-assemble and disassemble component 2 includes a fixing block 201, with limit blocks 202 fixedly connected to the bottom of both sides of the fixing block 201. A triangular extrusion groove 203 is provided through one side of the fixing block 201, and a square extrusion column 204 is movably embedded in the inner cavity of the triangular extrusion groove 203. A spring 3 208 is fixedly connected to the bottom end of the fixing block 201.

[0033] Specifically: Spring 3 208 has a smaller elastic force than Spring 2 207, which helps to pull the fixing block 201 into the fixing block moving groove 107, making it easier to remove the sleeve 301.

[0034] In one embodiment, a limiting column movable groove 205 is formed on the surface of the other end of the square extrusion column 204, a lever block 206 is fixedly connected to the side of the fixing block 201, a spring 207 is fixedly connected to one end of the square extrusion column 204, the interior of the two limiting column movable grooves 205 is movably sleeved on the surface of the two limiting columns 112, the interior of the two springs 207 is movably sleeved on the surface of the two limiting columns 112, the other end of the two springs 207 is fixedly connected to one end of the inner cavity of the two square extrusion column grooves 110, and the surfaces of the two lever blocks 206 are movably embedded in the interior of the two lever block grooves 111.

[0035] Specifically: a portion of the surface of one end of the square extrusion column 204 is always embedded inside the triangular extrusion groove 203, so that when the square extrusion column 204 limits the fixed block 201 next time, it can move into the triangular extrusion groove 203.

[0036] In one embodiment, the rotary cutter assembly 3 includes a sleeve 301. Four cutters 302 are fixedly connected to the surface of one end of the sleeve 301 in a circumferential manner. An installation groove 303 is formed on the surface of the other end of the sleeve 301. An auxiliary docking groove 304 is formed on both sides of the inner cavity of the installation groove 303. A fixing block installation groove 305 is formed on the other two sides of the inner cavity of the installation groove 303. The interior of the installation groove 303 is movably fitted onto the surface of one end of the connecting rod 1.

[0037] Specifically: the auxiliary docking block 113 and the auxiliary docking groove 304 work together to assist in the installation, making it easier to align the rotating cutter assembly 3 and make the positions of the fixing block 201 and the fixing block mounting groove 305 correspond.

[0038] In one embodiment, the surfaces of two fixing blocks 201 are movably embedded inside the two fixing block moving grooves 107, the surfaces of four limiting blocks 202 are movably embedded inside the four limiting grooves 108, the surfaces of two square extrusion columns 204 are movably embedded inside the two square extrusion column grooves 109 and 110, the surfaces of two fixing blocks 201 are movably embedded inside the two fixing block mounting grooves 305, and the other ends of two springs 208 are fixedly connected to one end of the inner cavity of the two fixing block moving grooves 107.

[0039] Specifically: the actuating block 206 is movably embedded inside the actuating block groove 111, limiting the movement of the actuating block 206 so that the actuating block 206 will not rotate. At the same time, the square extrusion column 204 is fitted with square extrusion column groove 109 and square extrusion column groove 210, which limit the square extrusion column 204 so that it cannot rotate, thus avoiding affecting the normal use of the square extrusion column 204.

[0040] In one embodiment, the surfaces of the two auxiliary docking blocks 113 are movably embedded inside the two auxiliary docking slots 304.

[0041] Specifically: the auxiliary docking block 113 and the auxiliary docking groove 304 work together to assist in the installation, making it easier to align the rotating cutter assembly 3 and make the positions of the fixing block 201 and the fixing block mounting groove 305 correspond.

[0042] Working principle: One end of the rotating shaft 104 is fixedly connected to the motor driving the rotating cutter head in the PVC air-cooled granulator. The motor is connected to an external power supply device, which is electrically connected to the motor and provides power. The motor is also connected to an external controller, which is electrically connected to the motor and controls it. The top of the auxiliary support rod 106 is fixedly connected to a suitable position in the PVC air-cooled granulator. The cutter 302 is in close contact with the extrusion structure in the PVC air-cooled granulator under the elastic force of the spring 103. The motor is started by the external controller, and the output end of the motor drives the rotating shaft 104 to rotate. Since the limiting block 105 is limited inside the limiting groove 102, the connecting rod 1 rotates with the rotating shaft 104, and the cutter 302 rotates with the connecting rod 1 to cut the extruded PVC plastic into pellets. One end of the sleeve 301 is not embedded in the extrusion structure, so it does not occupy the space of the extrusion structure for PVC plastic, thus improving the pelletizing efficiency. In the initial state, the spring 208 is in a stretched state. By holding the surface of the connecting rod 1, the thumb and forefinger are respectively positioned on two... The surface of the pry block 206 is moved and the connecting rod 1 is pulled towards the side of the rotating shaft 104. The rotating cutter assembly 3 moves towards the side of the rotating shaft 104, and the cutter 302 moves away from the extrusion structure. The spring 103 deforms under force. The thumb and forefinger slide the two pry blocks 206. The square extrusion column 204 moves towards the side of the rotating shaft 104 along with the pry blocks 206. After the fixed block 201 loses the limit at one end of the square extrusion column 204, it moves into the fixed block moving groove 107 under the action of the spring 308. The other hand pulls the sleeve 3. 01 Move towards the extrusion structure. After the fixed block 201 is no longer limiting the inside of the fixed block mounting slot 305, the rotary cutter assembly 3 can be removed. During installation, hold and pull the connecting rod 1 and the two lever blocks 206, align the auxiliary docking slot 304 with the auxiliary docking block 113 and insert it. Release your hand holding the connecting rod 1. Under the action of the spring 207, it will return to the initial position, completing the installation of the rotary cutter assembly 3. This design facilitates the installation and removal of the rotary cutter assembly 3 when replacing it.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A rotary cutter for air-cooled granulation of PVC plastic, characterized in that, include: The connecting rod (1) has a fixed block moving groove (107) on both sides of one end. The two fixed block moving grooves (107) have a limit groove (108) on both sides of the inner cavity of the two fixed block moving grooves (107). The two fixed block moving grooves (107) have a square extrusion column groove (109) on one side. The two square extrusion column grooves (109) have a square extrusion column groove (110) on the other end. The two square extrusion column grooves (110) have a through-hole opening of a bending block groove (111) on one side. The two square extrusion column grooves (110) have a limit column (112) fixedly connected to one end of the inner cavity of the two square extrusion column grooves (110). The connecting rod (1) has an auxiliary docking block (113) fixedly connected to the other two sides. The two fixed block moving grooves (107) are equipped with a convenient disassembly and assembly component (2). The connecting rod (1) has a rotating cutter assembly (3) on the surface of one end.

2. The rotary cutter for PVC plastic air-cooled granulation according to claim 1, characterized in that: The surface of one end of the connecting rod (1) is provided with a rotating shaft mounting groove (101). Both sides of the inner cavity of the rotating shaft mounting groove (101) are provided with a limiting groove (102). One end of the inner cavity of the rotating shaft mounting groove (101) is fixedly connected with a spring (103). The rotating shaft (104) is movably embedded in the interior of the rotating shaft mounting groove (101). Both sides of one end of the rotating shaft (104) are fixedly connected with a limiting block (105). The surfaces of the two limiting blocks (105) are movably embedded in the interior of the two limiting grooves (102). The other end of the spring (103) is fixedly connected to one end of the rotating shaft (104). An auxiliary support rod (106) is movably sleeved on the surface of the connecting rod (1). The other end of the rotating shaft (104) is fixedly connected with a motor.

3. The rotary cutter for PVC plastic air-cooled granulation according to claim 1, characterized in that: The convenient assembly and disassembly component (2) includes a fixing block (201), and two limit blocks (202) are fixedly connected to the bottom of both sides of the fixing block (201). A triangular extrusion groove (203) is provided through one side of the fixing block (201). A square extrusion column (204) is movably embedded in the inner cavity of the triangular extrusion groove (203). A spring (208) is fixedly connected to the bottom end of the fixing block (201).

4. The rotary cutter for PVC plastic air-cooled granulation according to claim 3, characterized in that: The other end of the square extrusion column (204) has a limit column movable groove (205) formed on its surface. The side of the fixed block (201) is fixedly connected to a lever block (206). One end of the square extrusion column (204) is fixedly connected to a spring (207). The two limit column movable grooves (205) are movably sleeved on the surface of the two limit columns (112). The two springs (207) are movably sleeved on the surface of the two limit columns (112). The other end of the two springs (207) is fixedly connected to one end of the inner cavity of the two square extrusion column grooves (110). The surfaces of the two lever blocks (206) are movably embedded in the inside of the two lever block grooves (111).

5. The rotary cutter for air-cooled granulation of PVC plastic according to claim 1, characterized in that: The rotary cutter assembly (3) includes a sleeve (301). Four cutters (302) are fixedly connected to the surface of one end of the sleeve (301) in a circular shape. An installation groove (303) is opened on the surface of the other end of the sleeve (301). An auxiliary docking groove (304) is opened on both sides of the inner cavity of the installation groove (303). A fixing block installation groove (305) is opened on the other two sides of the inner cavity of the installation groove (303). The interior of the installation groove (303) is movably sleeved on the surface of one end of the connecting rod (1).

6. The rotary cutter for PVC plastic air-cooled granulation according to claim 3, characterized in that: The surfaces of the two fixed blocks (201) are movably embedded in the interior of the two fixed block moving grooves (107), the surfaces of the four limiting blocks (202) are movably embedded in the interior of the four limiting grooves (108), the surfaces of the two square extrusion columns (204) are movably embedded in the interior of the two square extrusion column grooves (109) and the two square extrusion column grooves (110), the surfaces of the two fixed blocks (201) are movably embedded in the interior of the two fixed block mounting grooves (305), and the other ends of the two springs (208) are fixedly connected to one end of the inner cavity of the two fixed block moving grooves (107).

7. The rotary cutter for PVC plastic air-cooled granulation according to claim 1, characterized in that: The surfaces of the two auxiliary docking blocks (113) are movably embedded inside the two auxiliary docking slots (304).

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