Extrusion die for PVC pipe production

Abstract

The utility model provides an extrusion die for PVC (polyvinyl chloride) pipe production, which relates to the technical field of PVC pipe production dies and comprises a die table, a heating box mounted at the top of the die table, an extrusion pipe mounted in the heating box, a feed hopper mounted at the top of the heating box and communicated with the extrusion pipe, and a die head mounted on one side of the outer end of the extrusion pipe. The auger is arranged in the extrusion pipe, protrudes out of the other end of the extrusion pipe and is rotationally connected with the extrusion pipe through a bearing, and the auxiliary assembly is arranged at the bottom of the die head. The auxiliary assembly of the extrusion die for PVC pipe production can assist a die head to be detached from the outer end of an extrusion pipe, the die head is clamped in a containing groove after being detached, the die head can be stably placed, supporting force is provided for the die head through a supporting plate and a telescopic rod a to support the die head, the die head is prevented from falling off, and scalding caused when the die head is detached is avoided; and the die head can be moved to a low position, so that labor is saved when the die head is taken away.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC pipe production molds, in particular to an extrusion mold for PVC pipe production. Background Art

[0002] PVC pipe, namely polyvinyl chloride pipe, is a widely used plastic pipe. It is made of polyvinyl chloride resin and has good chemical stability, corrosion resistance, wear resistance and relatively good mechanical strength. When producing PVC pipes, a special extrusion mold is required to heat the raw materials and then transport the raw materials to the mold head inside the feed pipe through a auger for forming and extrusion. PVC pipes can be used as materials for wire insulation, connection, waterproofing and protection, and are usually widely used in fields such as electronics, electrical, communication and automotive. During the use of existing PVC pipe production extrusion molds, since PVC pipes of different sizes need to be produced, different mold heads need to be replaced. When the mold head is installed on the feed pipe, the temperature of the production raw materials from heating to extrusion can reach 160°C - 200°C, which causes the feed pipe and the mold head to be affected by the temperature of the production raw materials, and the surface temperature of the feed pipe and the mold head is very high. Moreover, the mold table is not provided with a structure to assist in the disassembly of the mold head, and the mold head is placed at a high position. When the mold head is disassembled and replaced, it is easy to cause burns and lead to the situation where the mold head drops due to being unable to hold it firmly. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is as follows: to provide an extrusion mold for PVC pipe production, through an auxiliary component, the mold head can be assisted to be disassembled from the outer end of the feed pipe. After the mold head is removed, it can be clamped and placed inside the placement groove, and the mold head can be stably placed. The support plate and the telescopic rod a provide a supporting force to hold the mold head, preventing the mold head from dropping, avoiding burns during the disassembly of the mold head, and also being able to move the mold head to a low position, making it more labor-saving when taking away the mold head.

[0004] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0005] An extrusion mold for PVC pipe production, comprising: a mold table, a heating box installed on the top of the mold table, a feed pipe installed inside the heating box, a feed hopper installed on the top of the heating box and connected to the feed pipe in a through manner, a mold head installed on one side of the outer end of the feed pipe, an auger arranged inside the feed pipe, the auger protruding from the other end of the feed pipe and rotatably connected to it through a bearing, an auxiliary component arranged at the bottom of the mold head, and the auxiliary component comprising: a fixed table, a support plate, a placement groove, a lifting cylinder and a telescopic rod a.

[0006] Preferably, a device box is fixedly installed on one side of the heating box, a servo motor is fixedly installed inside the device box, and the motor shaft of the servo motor is fixedly connected to the auger through bolts.

[0007] Preferably, a fixed table is fixedly installed at the bottom of the mold table near the mold head through bolts. A support seat is provided on the top of the fixed table. A support plate is provided on the top of the support seat. A placement groove is opened on the top of the support plate. Lifting cylinders are respectively installed on four sides of the inner bottom end of the support seat. The driving end of the lifting cylinder is connected with a telescopic rod a, and the top end of the telescopic rod a is fixedly connected with the support plate through bolts.

[0008] Preferably, sockets are respectively opened on four sides of the top of the support seat. Plug blocks inserted and fixed with the sockets are respectively installed on four sides of the bottom of the support plate.

[0009] Preferably, a fixing plate is installed on one side of the top end of the fixed table. A pushing cylinder is fixedly installed on the outer end of the fixing plate. The driving end of the pushing cylinder is connected with a telescopic rod b. Slide rails are installed on both sides of the top of the fixed table. Slide blocks slidably connected with the slide rails are installed on both sides of the bottom of the support seat. A through hole is opened on the outer side of the fixing plate, and the telescopic rod b passes through the through hole and is fixedly connected with the support seat through bolts.

[0010] Preferably, three mounting rods are fixedly installed at the bottom of the mold table. Fixed rings are welded to the bottom ends of the three mounting rods, and the fixed rings are sleeved and fixed with the pushing cylinder.

[0011] The beneficial effects of the present utility model are:

[0012] (1) Through the heating box and the material extrusion pipe of the present utility model, the production raw materials can be heated and softened, and the heated and softened production raw materials are transported to the mold head, and the production raw materials are formed and extruded according to the shape of the mold cavity inside the mold head.

[0013] (2) Through the auxiliary assembly of the present utility model, the mold head can be assisted to be disassembled from the outer end of the material extrusion pipe. After the mold head is removed, it is clamped and placed inside the placement groove, and the mold head can be stably placed. The support plate and the telescopic rod a provide a supporting force to hold the mold head, preventing the mold head from falling, avoiding scalding when the mold head is disassembled, and also being able to move the mold head to a low position, making it more labor-saving when taking away the mold head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 is a schematic diagram of the overall cross-section of the present utility model.

[0016] Figure 3 is a schematic diagram of the structure of the fixed table of the present utility model.

[0017] Figure 4This is the front view sectional schematic diagram of the support base of the present utility model.

[0018] Figure 5 This is the schematic diagram of the lifting of the support plate of the present utility model.

[0019] Figure 6 This is the structural schematic diagram of the support base of the present utility model.

[0020] Figure 7 This is the structural schematic diagram of the support plate of the present utility model.

[0021] Figures 1-7 In the figure: 1. Mold table; 2. Heating box; 201. Extrusion pipe; 202. Feeding hopper; 203. Mold head; 204. Screw conveyor; 205. Equipment box; 206. Servo motor; 3. Fixed table; 301. Support base; 302. Support plate; 303. Placing groove; 3031. Lifting cylinder; 304. Telescopic rod a; 305. Socket; 306. Plug; 307. Fixed plate; 308. Pushing cylinder; 309. Telescopic rod b; 310. Slide rail; 311. Slide block; 4. Mounting rod; 401. Fixed ring. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0023] Next, the present application will be described in detail in conjunction with the accompanying drawings and specific implementation manners.

[0024] Embodiment

[0025] As Figures 1-7 shown, a PVC pipe production extrusion mold includes: a mold table 1, a heating box 2 installed on the top of the mold table 1, an extrusion pipe 201 installed inside the heating box 2, a feeding hopper 202 installed on the top of the heating box 2 and connected to the extrusion pipe 201 in a through manner, a mold head 203 installed on one side of the outer end of the extrusion pipe 201, a screw conveyor 204 arranged inside the extrusion pipe 201, the screw conveyor 204 protruding from the other end of the extrusion pipe 201 and rotatably connected to it through a bearing, and an auxiliary component arranged at the bottom of the mold head 203. The auxiliary component includes: a fixed table 3, a support plate 302, a placing groove 303, a lifting cylinder 3011, and a telescopic rod a 304.

[0026] Among them, an equipment box 205 is fixedly installed on one side of the heating box 2, a servo motor 206 is fixedly installed inside the equipment box 205, and the motor shaft of the servo motor 206 is fixedly connected to the screw conveyor 204 through bolts.

[0027] When producing PVC pipes, the hopper cover at the top of the feed hopper 202 is flipped open, and the production raw materials are poured into the interior of the feed hopper 202. Since the feed hopper 202 is in communication with the extrusion pipe 201, the production raw materials can enter the interior of the extrusion pipe 201 and come into contact with the auger 204. The extrusion pipe 201 is located inside the heating box 2, and heating wires are wound around the outside of the extrusion pipe 201. The heating wires are protected by the heating box 2. The heating wires generate heat during operation, causing the production raw materials inside the extrusion pipe 201 to be heated and softened. Start the servo motor 206 to operate. The motor shaft of the servo motor 206 drives the auger 204 to rotate inside the extrusion pipe 201, and conveys the heated and softened production raw materials to the die head 203. The production raw materials are formed and extruded according to the shape of the die cavity inside the die head 203.

[0028] After the interior of the feed hopper 202 is filled with production raw materials, the hopper cover can be flipped to cover the feed hopper 202 to prevent the loss and dissipation of the heated heat.

[0029] Among them, a fixed platform 3 is fixedly installed by bolts at a position near the die head 203 at the bottom of the die table 1. A support seat 301 is provided on the top of the fixed platform 3. A support plate 302 is provided on the top of the support seat 301. A placement groove 303 is formed on the top of the support plate 302. Lifting cylinders 3011 are respectively installed on the four sides at the bottom end inside the support seat 301. The driving end of the lifting cylinder 3011 is connected with a telescopic rod a304, and the top end of the telescopic rod a304 is fixedly connected with the support plate 302 by bolts.

[0030] When producing PVC pipes of different sizes, turn off the operation of the servo motor 206 to stop the auger 204 from rotating inside the extrusion pipe 201 to prevent the production raw materials inside the extrusion pipe 201 from being discharged and wasted from the die head 203. At this time, move the support seat 301 to the bottom of the die head 203 so that the support plate 302 and the placement groove 303 are aligned and flush with the die head 203. Start the lifting cylinder 3011 to push the telescopic rod a304 upward. The telescopic rod a304 pushes the support plate 302 to move to the die head 203, and place the bottom end of the die head 203 into the interior of the placement groove 303. Support and hold the die head 203 by providing a supporting force through the support plate 302 and the telescopic rod a304. At this time, remove the bolts at the outer end of the die head 203 to release the fixation between the die head 203 and the extrusion pipe 201, which is convenient to remove the die head 203 and place it stably in the placement groove 303. The die head 203 can be stably placed to prevent the die head 203 from falling, and it can also avoid scalding during the disassembly of the die head 203.

[0031] After removing its die head 203 from the outer end of the extrusion pipe 201 and placing it on the support plate 302, start the lifting cylinder 3011 to drive the telescopic rod a304 to move downward, that is, the telescopic rod a304 drives the support plate 302 and the die head 203 to move downward, so that the die head 203 is in a low position, which is more labor-saving when removing the die head 203. And after the die head 203 is removed from the outer end of the extrusion pipe 201, the replaced die head 203 can be installed at the outer end of the extrusion pipe 201.

[0032] Among them, sockets 305 are respectively opened on the four sides of the top of the support base 301, and insertion blocks 306 inserted and fixed with the sockets 305 are respectively installed on the four sides of the bottom of the support plate 302.

[0033] When the telescopic rod a304 pushes the support plate 302 to move upward, the insertion blocks 306 on the four sides of the bottom of the support plate 302 will move out of the inside of the sockets 305, and when the telescopic rod a304 drives the support plate 302 to move downward back to the original position, the insertion blocks 306 will be reinserted into the inside of the sockets 305, so that the insertion blocks 306 are inserted and fixed with the sockets 305, increasing the stability of the placement between the support plate 302 and the support base 301.

[0034] Among them, a fixing plate 307 is installed on one side of the top of the fixed table 3, a pushing cylinder 308 is fixedly installed on the outer end of the fixing plate 307, the driving end of the pushing cylinder 308 is connected with a telescopic rod b309, slide rails 310 are installed on both sides of the top of the fixed table 3, and sliders 311 slidably connected with the slide rails 310 are installed on both sides of the bottom of the support base 301. A through hole is opened on the outside of the fixing plate 307, and the telescopic rod b309 passes through the through hole and is fixedly connected with the support base 301 by bolts.

[0035] When the support base 301 is in use, since the telescopic rod b309 passes through the through hole and is fixedly connected with the support base 301 by bolts, the setting of the through hole enables the telescopic rod b309 to flexibly pass through the fixing plate 307. Start the pushing cylinder 308 to work, and the pushing cylinder 308 drives the telescopic rod b309 to move to the right, that is, the telescopic rod b309 pushes the support base 301 to be stressed, so that the sliders 311 on both sides of the bottom of the support base 301 slide in the slide rails 310, and then push the support base 301 to move to the bottom of the die head 203, so that the support plate 302 and the placement groove 303 are aligned and flush with the die head 203.

[0036] After the support base 301 and the support plate 302 are used up, start the pushing cylinder 308 to drive the telescopic rod b309 to move to the left, that is, the telescopic rod b309 pulls the support base 301 to be stressed, so that the sliders 311 on both sides of the bottom of the support base 301 slide in the slide rails 310, and then pull the support base 301 to move away from the bottom of the die head 203, so that the support base 301 returns to the original position. The support base 301 and the support plate 302 can be stored at the bottom of the die table 1 to avoid affecting the production of PVC pipes by the die head 203.

[0037] One side of the outer end of the mold table 1 is provided with a control panel, and a power cord is installed at the bottom end of the control panel. The heating box 2, the servo motor 206, the lifting cylinder 3031, and the pushing cylinder 308 are connected to the control panel through wires. The length of the power cord is 4 meters, and a plug is installed at the other end of the power cord. The plug can be inserted into a socket in the room to connect to the power supply, so that the control panel, the heating box 2, the servo motor 206, the lifting cylinder 3031, and the pushing cylinder 308 can be normally powered on and used. The heating box 2, the servo motor 206, the lifting cylinder 3031, and the pushing cylinder 308 can be started and stopped through the control panel. The control panel is provided with an up button, a down button, a left shift button, and a right shift button, which respectively control the lifting and left and right movement of the lifting cylinder 3031 and the pushing cylinder 308. And for the control program involved in the present utility model, those skilled in the art can all achieve it according to the same or similar principles in the prior art. This part is not the innovation of the present utility model.

[0038] The heating wire wound on the material extrusion pipe 201 inside the heating box 2 is connected with a resistor and a temperature controller through wires. The temperature controller is connected to the control panel, so that the heating wire, the resistor, and the temperature controller can be powered on and used. The heating temperature can be set on the control panel, and the temperature value can be seen on the display screen of the control panel, which is convenient for workers to operate and use.

[0039] The model of the temperature controller is the KSD301 snap-action temperature controller 303. The working principle is as follows: A temperature sensor is installed inside the temperature controller, usually a thermistor (such as an NTC thermistor) or a thermocouple, which can sense the current ambient temperature. The temperature sensor converts the detected temperature value into an electrical signal and sends it to the control unit. A temperature set value is preset in the control unit, and it will compare the real-time temperature with the set temperature. According to the comparison result, the control unit will send a signal to the actuating element, such as a relay, a transistor, etc. These actuating elements are responsible for starting or stopping the heating wire. The temperature controller is a mature and conventional technology in the technical field. And this solution does not make improvements to the circuits or programs of the temperature controller, the resistor, the heating wire, and the control panel. The circuit and signal connection methods among the temperature controller, the resistor, the heating wire, and the control panel also belong to the common conventional technology. Therefore, the circuit and signal connection relationship will not be described in detail.

[0040] Three mounting rods 4 are fixedly installed at the bottom of the mold table 1. Fixed rings 401 are welded to the bottom ends of the three mounting rods 4, and the fixed rings 401 are sleeved and fixed with the pushing cylinder 308. When the pushing cylinder 308 is used, the pushing cylinder 308 is sequentially passed through the fixed ring 401 and sleeved and fixed with it. When one end of the pushing cylinder 308 is fixedly installed with the fixing plate 307, the pushing cylinder 308 can be suspended and fixed through the mounting rod 4 and the fixed ring 401, increasing the stability of the pushing cylinder 308 during placement and use.

[0041] Working principle:

[0042] When producing PVC pipes, turn over and open the hopper cover at the top of the feed hopper 202, pour the production raw materials into the interior of the feed hopper 202. Since the feed hopper 202 is in through connection with the extrusion pipe 201, the production raw materials can enter the interior of the extrusion pipe 201 and come into contact with the auger 204. The extrusion pipe 201 is located inside the heating box 2, and heating wires are wound around the outside of the extrusion pipe 201. The heating wires are protected by the heating box 2. When the heating wires work to generate heat, the production raw materials inside the extrusion pipe 201 are heated and softened. Start the servo motor 206 to work. The motor shaft of the servo motor 206 drives the auger 204 to rotate inside the extrusion pipe 201, and conveys the heated and softened production raw materials to the die head 203. The production raw materials are formed and extruded according to the shape of the die cavity inside the die head 203.

[0043] When producing PVC pipes of different sizes, turn off the servo motor 206 to stop the auger 204 from rotating inside the extrusion pipe 201, preventing the production raw materials inside the extrusion pipe 201 from being discharged and wasted from the die head 203. At this time, move the support base 301 to the bottom of the die head 203, so that the support plate 302 and the placement groove 303 are aligned and flush with the die head 203. Start the lifting cylinder 3011 to push the telescopic rod a304 upward. The telescopic rod a304 pushes the support plate 302 upward to move to the die head 203, and place the bottom end of the die head 203 into the placement groove 303. Provide a supporting force to hold the die head 203 through the support plate 302 and the telescopic rod a304. At this time, remove the bolts at the outer end of the die head 203 to release the fixation between the die head 203 and the extrusion pipe 201, facilitating the removal of the die head 203 and placing it stably in the placement groove 303. The die head 203 can be stably placed, preventing the die head 203 from falling, and also avoiding scalding during the disassembly of the die head 203.

[0044] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] The above has introduced in detail a PVC pipe production and extrusion die provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The descriptions of the above embodiments are only used to help understand the technical solution and its core idea of the present application. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A PVC pipe production extrusion die, characterized in that, Including: Mold table (1); A heating box (2) installed on the top of the mold table (1), and an extrusion pipe (201) is installed inside the heating box (2); A feed hopper (202) installed on the top of the heating box (2) and connected to the extrusion pipe (201) in a penetrating manner; A mold head (203) installed on one side of the outer end of the extrusion pipe (201); An auger (204) arranged inside the extrusion pipe (201), and the auger (204) protrudes from the other end of the extrusion pipe (201) and is rotatably connected to it through a bearing; An auxiliary component arranged at the bottom of the mold head (203), and the auxiliary component includes: a fixed table (3), a support plate (302), a placement groove (303), a lifting cylinder (3011) and a telescopic rod a (304).

2. The PVC pipe production extrusion die according to claim 1, characterized in that, A fixed table (3) is fixedly installed at the bottom of the mold table (1) near the mold head (203) through bolts. A support seat (301) is arranged on the top of the fixed table (3). A support plate (302) is arranged on the top of the support seat (301). A placement groove (303) is formed on the top of the support plate (302). Lifting cylinders (3011) are respectively installed on the four sides of the inner bottom end of the support seat (301). The driving end of the lifting cylinder (3011) is connected to a telescopic rod a (304), and the top end of the telescopic rod a (304) is fixedly connected to the support plate (302) through bolts.

3. The PVC pipe production extrusion die according to claim 1, characterized in that, A device box (205) is fixedly installed on one side of the heating box (2). A servo motor (206) is fixedly installed inside the device box (205). The motor shaft of the servo motor (206) is fixedly connected to the auger (204) through bolts.

4. The PVC pipe production extrusion die according to claim 2, wherein, Sockets (305) are respectively formed on the four sides of the top of the support seat (301). Plug blocks (306) inserted and fixed with the sockets (305) are respectively installed on the four sides of the bottom of the support plate (302).

5. The PVC pipe production extrusion die according to claim 2, characterized in that, A fixing plate (307) is installed on one side of the top end of the fixed table (3). A pushing cylinder (308) is fixedly installed on the outer end of the fixing plate (307). The driving end of the pushing cylinder (308) is connected to a telescopic rod b (309). Slide rails (310) are installed on both sides of the top of the fixed table (3). Sliders (311) slidably connected to the slide rails (310) are installed on both sides of the bottom of the support seat (301).

6. The PVC pipe production extrusion die according to claim 5, characterized in that, A through hole is formed on the outer side of the fixing plate (307), and the telescopic rod b (309) penetrates through the through hole and is fixedly connected to the support seat (301) through bolts.

7. The PVC pipe production extrusion die according to claim 5, characterized in that, Three mounting rods (4) are fixedly installed at the bottom of the mold table (1). Fixed rings (401) are welded to the bottom ends of the three mounting rods (4), and the fixed rings (401) are sleeved and fixed with the pushing cylinder (308).

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