Thermoplastic polyurethane elastomer extruder

Abstract

This utility model discloses a thermoplastic polyurethane elastomer extruder, relating to the field of extruders. It includes a main body with a replacement mechanism at its front end. The replacement mechanism includes a support frame with a through hole at its upper end. Four fixing heads are fixed within the through hole at the upper end of the support frame. A forward tilting shaft is slidably connected to the upper end of the support frame, and a tilting guide groove is formed on the forward tilting shaft, which is slidably connected to the four fixing heads. A replacement turntable is fixed at the front end of the forward tilting shaft, and a replacement die is mounted on the replacement turntable. A hydraulic push rod is located behind the support frame, and a limit mechanism is provided at the front end of the main body. The advantages are: through translational disassembly, tilting replacement, and limit sealing actions, the extrusion head can be quickly replaced, and these actions are completed in one extension and retraction of the hydraulic push rod. This device has the characteristics of simple structure, low manufacturing cost, and is easy to maintain and promote.

Description

Technical Field

[0001] This utility model relates to the field of extruders, and in particular to a thermoplastic polyurethane elastomer extruder. Background Technology

[0002] Thermoplastic polyurethane (TPU) is a multifunctional thermoplastic polymer with elastomer properties. It is produced by extrusion compounding of NCO-functionalized diisocyanates, OH-functionalized polyethers, polyester polyols, and chain extenders. Due to its excellent physical properties, such as abrasion resistance, tensile strength, impact resistance, and good weather and chemical resistance, thermoplastic polyurethane elastomers are widely used in many fields. They are widely used in footwear materials, sporting goods, automotive parts, wires and cables, films, injection molded products, etc.

[0003] For example, patent document CN222807585U discloses a thermoplastic polyurethane elastomer extruder, including an extruder body for manufacturing thermoplastic polyurethane elastomers. The extruder body has a mold assembly at its front end, comprising a long plate with two circular grooves at its front end. Each groove contains an extrusion head for extruding thermoplastic polyurethane elastomers, and each extrusion head has an extrusion hole at its front end. A rotating rod is fixedly inserted through the center of the front end of the long plate, and support plates are movably fitted onto the outer walls of both ends of the rotating rod. This device drives the rotating rod to rotate the long plate via a geared motor. During the extrusion of the thermoplastic polyurethane elastomer, the positions of the two extrusion heads can be automatically switched, resulting in different extruded shapes of the thermoplastic polyurethane elastomer. Furthermore, when switching between the two extrusion heads, it is convenient for operators to disassemble and clean the extrusion heads, thereby improving the applicability of the extruder body.

[0004] The aforementioned device uses a motor and several electric telescopic rods to flip and move the extruder head for replacement and installation, thus greatly reducing the time required to change the extruder head. However, it requires a large number of electric components to complete these actions, resulting in high manufacturing and maintenance costs, which hinders the widespread use of the device. Utility Model Content

[0005] The purpose of this invention is to provide a thermoplastic polyurethane elastomer extruder in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions: A thermoplastic polyurethane elastomer extruder includes a main body with a replacement mechanism at its front end. The replacement mechanism includes a support frame with a through hole at its upper end. Four circumferentially evenly arranged fixed heads are fixedly connected to the through hole at the upper end of the support frame. A forward tilting shaft is slidably connected to the upper end of the support frame. The forward tilting shaft has a tilting guide groove, which includes four circumferentially evenly arranged straight grooves. Adjacent straight grooves are connected by curved grooves. The tilting guide groove is slidably connected to the four fixed heads. A replacement turntable is fixedly connected to the front end of the forward tilting shaft. The replacement turntable is composed of several connected circumferentially evenly distributed rings. Replacement dies are installed in the rings on the replacement turntable. A hydraulic push rod for driving the forward tilting shaft is provided at the rear of the support frame. A limit mechanism is provided at the front end of the main body.

[0007] Preferably, the main body of the equipment includes an extruder body, a heating component is installed on the extruder body, a transition pipe is fixedly connected to the front end of the extruder body, a filter plate is fixedly connected inside the transition pipe, the extruder body is fixedly connected to the support frame, and the hydraulic push rod is fixedly connected to the extruder body.

[0008] Preferably, a connecting ring is fixedly connected to the rear end of the support frame, a first spring is fixedly connected to the rear end of the connecting ring, a push turntable is fixedly connected to the rear end of the first spring, the push turntable is rotatably connected to the rear end of the forward tilting shaft, and an active push plate is fixedly connected to the output end of the hydraulic push rod, the active push plate being able to abut against the push turntable.

[0009] Preferably, the replacement die head includes an extrusion head that is movably connected to the replacement turntable. A screw hole boss is fixedly connected to one side of the extrusion head, and a locking bolt is fixedly connected to one side of the ring on the replacement turntable. The locking bolt can be threadedly connected to the screw hole boss. An internal hexagon is fixedly connected to the outer end of the locking bolt. A sealing ring is fixedly connected to the rear side of the extrusion head. The sealing ring is provided with several circumferentially evenly arranged inclined grooves.

[0010] Preferably, the limiting mechanism includes a sealing groove ring fixedly connected to the front end of the transition tube, a sealing insert ring that can be inserted into the sealing groove ring, a connecting ring fixedly connected to the sealing groove ring, and a plurality of circumferentially evenly arranged inclined positioning pins slidably connected to the connecting ring, the inclined positioning pins that can extend into the sealing insert ring and abut against the inclined bottom groove.

[0011] Preferably, a hydraulic cylinder is provided at the rear of the support frame. One end of the hydraulic cylinder is slidably connected to a sealing piston, and the other end of the hydraulic cylinder is connected to a connecting ring through a pipe. A second spring is fixedly connected between the sealing piston and the hydraulic cylinder. The active push plate extends downward and can abut against the sealing piston.

[0012] The beneficial effects are as follows: through the cooperation of components such as hydraulic push rod, forward flipping shaft, connecting ring, and inclined positioning pin, this device realizes the actions of translational disassembly and assembly, flipping replacement, and limiting sealing. In this way, the extrusion head can be quickly replaced, and the above actions are completed in one extension and retraction of the hydraulic push rod. This device has the characteristics of simple structure, low manufacturing cost, and easy control, and is easy to maintain and promote.

[0013] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of a thermoplastic polyurethane elastomer extruder according to the present invention; Figure 2 This is a right view of the thermoplastic polyurethane elastomer extruder described in this utility model; Figure 3 This is a right-side sectional view of the thermoplastic polyurethane elastomer extruder described in this utility model; Figure 4 This is a front view of the main body of the thermoplastic polyurethane elastomer extruder described in this utility model; Figure 5 This is a three-dimensional structural view of the replacement mechanism of a thermoplastic polyurethane elastomer extruder according to the present invention; Figure 6 This is a three-dimensional view of the forward tilting shaft and the changing turntable of a thermoplastic polyurethane elastomer extruder according to the present invention. Figure 7 This is a three-dimensional structural view of the replacement die head of a thermoplastic polyurethane elastomer extruder according to the present invention; Figure 8 This is a three-dimensional structural view of the limiting mechanism of the thermoplastic polyurethane elastomer extruder described in this utility model; Figure 9 This is a right-side sectional view of the hydraulic cylinder of a thermoplastic polyurethane elastomer extruder according to the present invention. Figure 10 This is a front sectional view of the connecting ring of the thermoplastic polyurethane elastomer extruder described in this utility model; Figure 11 yes Figure 3 Enlarged view of point A in the middle.

[0015] The annotations in the attached figures are explained as follows: 101. Extruder body; 102. Transition pipe; 103. Heating assembly; 104. Filter plate; 201. Support frame; 202. Fixed head; 203. Replacement turntable; 204. Locking bolt; 205. Connecting ring; 206. First spring; 207. Push turntable; 208. Active push plate; 209. Hydraulic push rod; 210. Forward tilting shaft; 211. Tilting guide groove; 301. Extrusion head; 302. Sealing ring; 303. Sloping bottom groove; 304. Screw hole boss; 401. Connecting ring; 402. Sealing groove ring; 403. Sloping locating pin; 404. Pipe; 405. Hydraulic cylinder; 406. Sealing piston; 407. Second spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-11As shown, a thermoplastic polyurethane elastomer extruder includes a main body with a replacement mechanism at its front end. The replacement mechanism includes a support frame 201 with a through hole at its upper end. Four evenly spaced fixed heads 202 are fixedly connected to the through hole at the upper end of the support frame 201. A forward tilting shaft 210 is slidably connected to the upper end of the support frame 201. The forward tilting shaft 210 has a tilting guide groove 211, which includes four evenly spaced straight grooves. Adjacent straight grooves are connected by curved grooves. A baffle is hinged at the connection point between the straight grooves and the curved grooves by a torsion spring, ensuring movement according to a predetermined pattern. The tilting guide groove 211 is slidably connected to the four fixed heads 202. A replacement turntable 203 is fixedly connected to the front end of the forward tilting shaft 210. The replacement turntable 203 is composed of several connected, evenly distributed circular rings. A replacement die head is installed within each ring on the replacement turntable 203. A mechanism for driving the forward tilting shaft is located behind the support frame 201. The hydraulic push rod 209 moves the rotating shaft 210. A limit mechanism is set at the front end of the main body of the equipment. In use, the hydraulic push rod 209 pushes the forward rotating shaft 210 forward. Under the interaction of the rotating guide groove 211 and the fixed head 202, the forward rotating shaft 210 presents a state of not rotating forward, rotating forward, and not rotating forward during the forward process. During the backward process, it always remains not rotating backward. The changing turntable 203, which moves synchronously with the forward rotating shaft 210, can remove the changing mold head from the limit mechanism. Then, the changing turntable 203 rotates 90 degrees during the forward process to move the new changing mold head in front of the limit mechanism. Next, the changing turntable 203 moves backward so that the new changing turntable 203 is installed and cooperated with the limit mechanism. This is achieved by setting up the forward rotating shaft 210 and the hydraulic push rod 209. The changing mold head can be rotated and moved and installed by using only one driving component, the hydraulic push rod 209. The structure is simple, the manufacturing cost is low, and it is easy to maintain, use and promote the device.

[0019] The main body of the equipment includes an extruder body 101, which is existing technology and will not be described in detail here. A heating component 103 is installed on the extruder body 101. The heating component 103 can be electric heating, oil heating, etc. The heating component 103 heats the polyurethane inside the extruder body 101. A transition pipe 102 is fixedly connected to the front end of the extruder body 101. A filter plate 104 is fixedly connected inside the transition pipe 102. The filter plate 104 removes impurities from the melt. The extruder body 101 is fixedly connected to the support frame 201. The hydraulic push rod 209 is fixedly connected to the extruder body 101. The polyurethane elastomer is plasticized under the action of the extruder body 101 and extruded into strips of various specific shapes by changing the die head.

[0020] A connecting ring 205 is fixedly connected to the rear end of the support frame 201. A first spring 206 is fixedly connected to the rear end of the connecting ring 205. A push turntable 207 is fixedly connected to the rear end of the first spring 206. The push turntable 207 is rotatably connected to the rear end of the forward tilting shaft 210. An active push plate 208 is fixedly connected to the output end of the hydraulic push rod 209. The active push plate 208 can abut against the push turntable 207. The hydraulic push rod 209 pushes the active push plate 208 to move. The active push plate 208 moves forward and abuts against the push turntable 207, pushing the push turntable 207 to move. Thus, the push turntable 207 pushes the forward tilting shaft 210 forward. During this process, the forward tilting shaft 210 and the push turntable 207 rotate relative to each other, and the first spring 206 is compressed. During the retraction of the hydraulic push rod 209, the first spring 206 drives the push turntable 207 to reset, and the push turntable 207 drives the forward tilting shaft 210 to retract.

[0021] The replacement die head includes an extrusion head 301 movably connected to the replacement turntable 203. A screw hole boss 304 is fixedly connected to one side of the extrusion head 301, and a locking bolt 204 is fixedly connected to one side of the ring on the replacement turntable 203. The locking bolt 204 can be threadedly connected to the screw hole boss 304. An internal hexagon is fixedly connected to the outer end of the locking bolt 204. A sealing ring 302 is fixedly connected to the rear side of the extrusion head 301. The sealing ring 302 is provided with several circumferentially evenly arranged inclined bottom grooves 303. In use, the operator aligns the extrusion head 301 with the ring on the replacement turntable 203, and the screw hole boss 304 aligns with the locking bolt 204. After the extrusion head 301 is installed into the replacement turntable 203, the operator fixes the extrusion head 301 to the replacement turntable 203 using the locking bolt 204.

[0022] The limiting mechanism includes a sealing groove ring 402 fixedly connected to the front end of the transition tube 102, a sealing insert ring 302 that can be inserted into the sealing groove ring 402, a connecting ring 401 fixedly connected to the sealing groove ring 402, and several circumferentially evenly arranged inclined positioning pins 403 slidably connected to the connecting ring 401. The inclined positioning pins 403 can extend into the sealing insert ring 302 and abut against the inclined bottom groove 303. In use, the replacement turntable 203 drives the extrusion head 301 to move, and the extrusion head 301 drives the sealing insert ring 302 to insert into the sealing groove ring 402, initially achieving the sealing condition. Subsequently, the hydraulic oil in the connecting ring 401 drives the inclined positioning pins 403 to move, and the inclined surface on the inclined positioning pin 403 abuts against the inclined bottom groove 303. Under the action of the inclined surface, the sealing insert ring 302 moves inward, increasing the sealing pressure, thereby achieving a better sealing condition.

[0023] A hydraulic cylinder 405 is installed behind the support frame 201. One end of the hydraulic cylinder 405 is slidably connected to a sealing piston 406, and the other end of the hydraulic cylinder 405 is connected to a connecting ring 401 through a pipe 404. A second spring 407 is fixedly connected between the sealing piston 406 and the hydraulic cylinder 405. The active push plate 208 extends downward and can abut against the sealing piston 406. During the retraction of the hydraulic push rod 209, the active push plate 208 moves backward. Then, the active push plate 208 abuts against the sealing piston 406 and drives the driver to move backward. During this process, the space inside the hydraulic cylinder 405 becomes smaller, so the inclined positioning pin 403 can be extended by hydraulic pressure. At the same time, the second spring 407 is compressed. During the process of the hydraulic push rod 209 driving the active push plate 208 forward, the sealing piston 406 is reset under the action of the second spring 407. Thus, the inclined positioning pin 403 is also reset, thereby removing the limit on the extrusion head 301, so the extrusion head 301 can be removed.

[0024] Working principle: During use, the operator installs the extrusion head 301 on the replacement turntable 203 and tightens it with the locking bolt 204. When it is necessary to replace the extrusion head 301, the hydraulic push rod 209 drives the active push plate 208 forward. During this process, the sealing piston 406 moves forward with the active push plate 208 under the action of the second spring 407, thus resetting the inclined locating pin 403. This removes the limit on the extrusion head 301, allowing it to be removed. When the sealing piston 406 reaches its maximum stroke, the active push plate 208... The push plate 208 disengages from the sealing piston 406 and begins to contact the push turntable 207. The push plate 208 pushes the push turntable 207 to move, which in turn pushes the forward tilting shaft 210 forward. Under the interaction of the tilting guide groove 211 and the fixed head 202, the forward tilting shaft 210 exhibits a state of moving forward without rotating, tilting forward, and moving forward without rotating during its forward movement. During its backward movement, it consistently remains stationary while reversing. The changing turntable 203, which synchronizes the movement of the forward tilting shaft 210, can thus... The replacement mold head is removed from the limiting mechanism. Then, the replacement turntable 203 rotates 90 degrees during its forward movement, transferring the new replacement mold head to the front of the limiting mechanism. Next, the hydraulic push rod 209 retracts, driving the active push plate 208 to move backward. The first spring 206 drives the push turntable 207 to move backward with the active push plate 208. The push turntable 207 drives the forward rotating shaft 210 to retract. When the push turntable 207 retracts to its maximum position, the sealing ring 302 and the sealing groove ring 402 form a preliminary sealing fit. Simultaneously, the active push plate 208... When the piston 406 is pressed against the sealing piston and the driver moves backward, the space inside the hydraulic cylinder 405 becomes smaller. Thus, the inclined positioning pin 403 can be extended by hydraulic pressure. The inclined surface on the inclined positioning pin 403 abuts against the inclined bottom groove 303. Under the action of the inclined surface, the sealing ring 302 moves inward, increasing the sealing pressure and thus achieving better sealing conditions. In this way, the extrusion head 301 is replaced by the action of translational disassembly, flipping and replacement, and limiting the seal. Moreover, the above actions are completed only by the extension and retraction of the hydraulic push rod 209.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A thermoplastic polyurethane elastomer extruder, comprising a main body, characterized in that: The front end of the main body of the equipment is provided with a replacement mechanism, which includes a support frame (201). The upper end of the support frame (201) is provided with a through hole. Four circumferentially evenly arranged fixing heads (202) are fixedly connected in the through hole at the upper end of the support frame (201). A forward tilting shaft (210) is slidably connected to the upper end of the support frame (201). A tilting guide groove (211) is provided on the forward tilting shaft (210). The tilting guide groove (211) includes four circumferentially evenly arranged straight grooves. There is a passage between two adjacent straight grooves. The curved groove is connected to the flip guide groove (211) and the four fixed heads (202). The front end of the forward flip shaft (210) is fixedly connected to the changing turntable (203). The changing turntable (203) is composed of several connected circumferentially evenly distributed rings. The changing mold head is installed in the ring on the changing turntable (203). A hydraulic push rod (209) for driving the forward flip shaft (210) to move is provided behind the support frame (201). The front end of the main body of the equipment is provided with a limit mechanism.

2. The thermoplastic polyurethane elastomer extruder according to claim 1, characterized in that: The main body of the equipment includes an extruder body (101), a heating component (103) is installed on the extruder body (101), a transition pipe (102) is fixedly connected to the front end of the extruder body (101), a filter plate (104) is fixedly connected inside the transition pipe (102), the extruder body (101) is fixedly connected to the support frame (201), and the hydraulic push rod (209) is fixedly connected to the extruder body (101).

3. The thermoplastic polyurethane elastomer extruder according to claim 2, characterized in that: The support frame (201) is fixedly connected to a connecting ring (205) at its rear end. The connecting ring (205) is fixedly connected to a first spring (206) at its rear end. The first spring (206) is fixedly connected to a push turntable (207) at its rear end. The push turntable (207) is rotatably connected to the rear end of the forward tilting shaft (210). The output end of the hydraulic push rod (209) is fixedly connected to an active push plate (208). The active push plate (208) can abut against the push turntable (207).

4. The thermoplastic polyurethane elastomer extruder according to claim 3, characterized in that: The replacement die head includes an extrusion head (301) movably connected to the replacement turntable (203). A screw hole boss (304) is fixedly connected to one side of the extrusion head (301). A locking bolt (204) is fixedly connected to one side of the ring on the replacement turntable (203). The locking bolt (204) can be threadedly connected to the screw hole boss (304). An internal hexagon is fixedly connected to the outer end of the locking bolt (204). A sealing ring (302) is fixedly connected to the rear side of the extrusion head (301). A plurality of circumferentially evenly arranged inclined bottom grooves (303) are provided on the sealing ring (302).

5. The thermoplastic polyurethane elastomer extruder according to claim 4, characterized in that: The limiting mechanism includes a sealing groove ring (402) fixedly connected to the front end of the transition tube (102), and a sealing insert ring (302) that can be inserted into the sealing groove ring (402). A connecting ring (401) is fixedly connected to the sealing groove ring (402), and a plurality of circumferentially evenly arranged inclined positioning pins (403) are slidably connected to the connecting ring (401). The inclined positioning pins (403) can extend into the sealing insert ring (302) and abut against the inclined bottom groove (303).

6. The thermoplastic polyurethane elastomer extruder according to claim 5, characterized in that: A hydraulic cylinder (405) is provided behind the support frame (201). One end of the hydraulic cylinder (405) is slidably connected to a sealing piston (406). The other end of the hydraulic cylinder (405) is connected to the connecting ring (401) through a pipe (404). A second spring (407) is fixedly connected between the sealing piston (406) and the hydraulic cylinder (405). The active push plate (208) extends downward and can abut against the sealing piston (406).

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