An impact-resistant plastic extrusion mold

Abstract

This utility model discloses an impact-resistant plastic extrusion mold, belonging to the field of mold technology. The impact-resistant plastic extrusion mold includes a mold body, with a feed inlet on the top surface of the mold body. A feed pipe is connected to the top of the feed inlet, and the feed pipe includes a tube body. A sealing cap is hinged to the top of the tube body. A pressing mechanism is provided on the top surface of the sealing cap. The pressing mechanism includes a cylinder, the output end of which extends into the interior of the tube body and is connected to a pressure plate. The bottom surface of the pressure plate has an arc-shaped curved surface, which is flush with the inner wall of the mold body. This utility model, through the coordinated use of the feed inlet, feed pipe, and pressing mechanism, reduces clogging in the extrusion mold.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to an impact-resistant plastic extrusion mold. Background Technology

[0002] Plastic molds, short for combined plastic molds used in compression molding, extrusion molding, injection molding, blow molding, and low-foaming molding, are used in various tools and products we use in daily production and life, from large machine tool bases and machine housings to small blank head screws. A search revealed a Chinese patent with authorization announcement number CN208020628U, which discloses a plastic extrusion mold for irregularly shaped tubes. The mold includes a base, a support column on one side of the top of the base, and the support column is tightly welded to the base. A top seat is fixedly installed on the top of the support column, and a fixing block is fixedly installed on the top of the top seat. An inner mold is installed on the fixing block, and a second mold is welded to one side of the top of the fixing block. A pin is inserted into the second mold, which has a second cooling groove. A first mold is installed on the other side of the top of the fixing block and is movably mounted on the fixing block. The first mold has a first cooling groove, and a water tank is installed on the top of the base. This invention allows for the adjustment of the thickness of the produced shaped tubes by opening several mounting slots on the fixed block, enabling the insertion of an inner mold into the corresponding mounting slot as needed, thus making it more versatile.

[0003] Currently, due to the lack of cleaning facilities during the raw material feeding process, some raw materials may accumulate at the feed inlet of existing extrusion dies. Once solidified, this can cause blockages, which is detrimental to subsequent normal use. Utility Model Content

[0004] To address the problem of easy cleaning of raw materials at the feed inlet in existing extrusion molds, this invention provides an impact-resistant plastic extrusion mold.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] An impact-resistant plastic extrusion mold includes a mold body, a feed port on the top surface of the mold body, a feed pipe connected to the top of the feed port, the feed pipe including a tube body, a sealing cap hinged to the top of the tube body, a pressing mechanism on the top surface of the sealing cap, the pressing mechanism including a cylinder, the output end of the cylinder extending into the interior of the tube body and connected to a pressure plate, the bottom surface of the pressure plate having an arc-shaped curved surface, the bottom surface of the arc-shaped curved surface being flush with the inner wall of the mold body.

[0007] Furthermore, one end of the mold body is connected to a glue outlet pipe, the glue outlet pipe includes a tapered pipe, one end of the tapered pipe is fitted with a connecting sleeve, and one end of the connecting sleeve is threadedly connected to one end of the mold body.

[0008] The beneficial effects of adopting the above-mentioned further solution are that the dispensing tube guides the plastic flow through the tapered pipe, the tapered structure reduces flow resistance, and makes the plastic extrusion smoother; the connecting sleeve is threadedly connected to the mold body, which facilitates the quick disassembly and replacement of the dispensing tube, adapts to different specifications of extrusion requirements, and at the same time, the threaded connection has strong sealing performance, preventing plastic leakage at the connection and ensuring the stability of the extrusion process.

[0009] Furthermore, the tapered pipe has a dispensing nozzle connected to the end furthest from the connecting sleeve.

[0010] The beneficial effects of adopting the above-mentioned further solution are that the nozzle at the end of the tapered pipe reduces the outlet diameter, which can precisely control the plastic extrusion shape and ensure the dimensional accuracy of the molded product; the nozzle concentrates the plastic flow direction, enhances the extrusion pressure, and makes the plastic tightly formed at the outlet.

[0011] Furthermore, a propulsion mechanism is provided at one end of the mold body. The propulsion mechanism includes a tube cover, a motor is installed on one side of the tube cover, the output end of the motor extends into the interior of the mold body and is connected to a lead screw, a slider is threaded to one end of the lead screw, and a cone block is connected to one end of the slider.

[0012] The beneficial effects of adopting the above-mentioned further solution are that the motor drives the lead screw to rotate, causing the slider and cone to move along the inner wall of the mold body. The cone pushes the plastic towards the dispensing tube, assisting in material filling and extrusion. This is especially suitable for the extrusion of high-viscosity, impact-resistant plastics, reducing material retention. The tube cap provides mounting support for the motor and lead screw, ensuring stable operation of the transmission structure.

[0013] Furthermore, the inner wall of the mold body is provided with grooves on both sides that engage with the slider.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the groove engages with the slider, providing guidance for the slider, preventing it from rotating or deviating during the advancement process, and ensuring that the cone block smoothly pushes the plastic along a straight line.

[0015] Furthermore, bolts are inserted into the outer wall of the tube cap, and a screw hole is provided at one end of the mold body to engage with the bolts.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the tube cover is connected to the screw hole of the mold body by bolts, so as to realize the firm fixation of the propulsion mechanism and the mold, prevent the tube cover from loosening due to vibration generated during motor operation, and ensure the accuracy of screw transmission.

[0017] Furthermore, the outer wall of the cone block is parallel to the outer wall of the cone-shaped pipe.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the outer wall of the cone block is parallel to the outer wall of the conical pipe, so that the force direction of the cone block pushing the plastic is consistent with the guiding direction of the pipe, reducing the flow resistance of the plastic, avoiding excessive local pressure that could damage the mold, and ensuring that the plastic flows evenly in the conical pipe.

[0019] Furthermore, a locking buckle is installed between the tube body and the sealing cap.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the locking mechanism enhances the tightness of the closure between the tube body and the sealing cap, preventing the plastic raw material in the feed tube from leaking out from the gap during high-pressure extrusion.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This type of impact-resistant plastic extrusion mold, through the coordinated use of the inlet, feed tube, and pressing mechanism, reduces clogging. The mold body is connected to the feed tube via the inlet, and the sealing cap at the top of the tube, along with a locking buckle, seals the inlet, preventing plastic material from overflowing or impurities from entering. The cylinder of the pressing mechanism drives the pressure plate to press down, and the curved surface fits against the inner wall of the mold, applying uniform pressure to the material, promoting full filling of the mold cavity, and reducing material residue in the tube. Furthermore, the curved surface design ensures that the pressure plate remains flush with the inner wall of the mold, thereby guaranteeing smooth material movement within the mold body. Attached Figure Description

[0023] Figure 1 A three-dimensional schematic diagram of an impact-resistant plastic extrusion mold provided by this utility model;

[0024] Figure 2 A schematic diagram of the dispensing tube of an impact-resistant plastic extrusion mold provided by this utility model;

[0025] Figure 3 A schematic diagram of the pressing mechanism of an impact-resistant plastic extrusion mold provided by this utility model;

[0026] Figure 4 A schematic diagram of the propulsion mechanism of an impact-resistant plastic extrusion mold provided by this utility model.

[0027] In the diagram: 1. Mold body; 2. Dispensing tube; 201. Conical pipe; 202. Connecting sleeve; 203. Dispensing nozzle; 3. Feed pipe; 301. Pipe body; 302. Sealing cap; 303. Lock; 4. Pressing mechanism; 401. Cylinder; 402. Pressure plate; 403. Curved surface; 5. Propulsion mechanism; 501. Pipe cap; 502. Motor; 503. Lead screw; 504. Slider; 505. Conical block; 506. Bolt; 6. Feed port; 7. Slide groove; 8. Screw hole. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1-4 This utility model provides a technical solution: an impact-resistant plastic extrusion mold, including a mold body 1. A feed inlet 6 is provided on the top surface of the mold body 1. A feed pipe 3 is connected to the top of the feed inlet 6. The feed pipe 3 includes a pipe body 301. A sealing cap 302 is hinged to the top of the pipe body 301. A pressing mechanism 4 is provided on the top surface of the sealing cap 302. The pressing mechanism 4 includes a cylinder 401. The output end of the cylinder 401 extends into the interior of the pipe body 301 and is connected to a pressure plate 402. The bottom surface of the pressure plate 402 is provided with an arc-shaped curved surface 403. The bottom surface of the arc-shaped curved surface 403 is flush with the mold body 1. The inner walls are flush. The mold body 1 is connected to the feed pipe 3 through the feed port 6. The sealing cap 302 at the top of the pipe body 301, together with the locking buckle 303, seals the feed port to prevent plastic material from overflowing or impurities from entering. The cylinder 401 of the pressing mechanism 4 drives the pressure plate 402 to press down. The arc-shaped curved surface 403 fits against the inner wall of the mold, which can apply uniform pressure to the material, promote the material to fully fill the mold cavity, and reduce the material residue in the pipe body 301. Furthermore, the design of the arc-shaped curved surface 403 ensures that the pressure plate 402 is flush with the inner wall of the mold, thereby ensuring the smooth movement of the material inside the mold body 1.

[0030] 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.

[0031] As an embodiment of this utility model, further, one end of the mold body 1 is connected to a dispensing pipe 2, the dispensing pipe 2 includes a tapered pipe 201, one end of the tapered pipe 201 is fitted with a connecting sleeve 202, one end of the connecting sleeve 202 is threadedly connected to one end of the mold body 1, the dispensing pipe 2 guides the plastic flow through the tapered pipe 201, the tapered structure reduces flow resistance, making the plastic extrusion smoother; the connecting sleeve 202 is threadedly connected to the mold body, which facilitates the quick disassembly and replacement of the dispensing pipe, adapts to different specifications of extrusion requirements, and at the same time the threaded connection has strong sealing performance, preventing plastic leakage at the connection point and ensuring the stability of the extrusion process.

[0032] As an embodiment of this utility model, the tapered pipe 201 is further connected to a dispensing nozzle 203 at the end away from the connecting sleeve 202. The dispensing nozzle 203 at the end of the tapered pipe 201 has a narrow dispensing diameter, which can accurately control the plastic extrusion shape and ensure the dimensional accuracy of the molded product. The dispensing nozzle concentrates the plastic flow direction, enhances the extrusion pressure, and makes the plastic tightly formed at the outlet.

[0033] In one embodiment of this utility model, a further step is to provide a pushing mechanism 5 at one end of the mold body 1. The pushing mechanism 5 includes a tube cover 501, a motor 502 mounted on one side of the tube cover 501, the output end of the motor 502 extending into the interior of the mold body 1 and connected to a lead screw 503. One end of the lead screw 503 is threadedly connected to a slider 504, and one end of the slider 504 is connected to a cone block 505. The motor 502 drives the lead screw 503 to rotate, causing the slider 504 and the cone block 505 to move along the inner wall of the mold body 1. The cone block pushes the plastic towards the dispensing pipe 2, assisting in material filling and extrusion, especially suitable for the extrusion of high-viscosity, impact-resistant plastics, reducing material retention. The tube cover 501 provides mounting support for the motor and lead screw, ensuring stable operation of the transmission structure.

[0034] As an embodiment of this utility model, further, the inner walls of the mold body 1 are respectively provided with grooves 7 that engage with the slider 504. The grooves 7 engage with the slider 504 to provide guidance for the slider, prevent it from rotating or deviating during the advancement process, and ensure that the cone block 505 pushes the plastic smoothly along a straight line.

[0035] As an embodiment of this utility model, the outer wall of the tube cover 501 is further provided with bolts 506, and one end of the mold body 1 is provided with a screw hole 8 that engages with the bolts 506. The tube cover 501 is connected to the screw hole 8 of the mold body 1 through the bolts 506, so as to realize the firm fixation of the pushing mechanism and the mold, prevent the vibration generated by the motor 502 during operation from causing the tube cover to loosen, and ensure the transmission accuracy of the lead screw 503.

[0036] As an embodiment of this utility model, the outer wall of the cone block 505 is parallel to the outer wall of the cone pipe 201. The parallelism between the outer wall of the cone block 505 and the outer wall of the cone pipe 201 makes the force direction of the cone block pushing the plastic consistent with the guiding direction of the pipe, thereby reducing the flow resistance of the plastic, avoiding excessive local pressure that could damage the mold, and ensuring that the plastic flows evenly in the cone pipe.

[0037] As an embodiment of this utility model, a latch 303 is further installed between the tube body 301 and the sealing cap 302. The latch 303 enhances the tightness of the closure between the tube body 301 and the sealing cap 302, preventing the plastic raw material in the feed tube from overflowing from the gap during high-pressure extrusion.

[0038] Specifically, the working principle of this impact-resistant plastic extrusion mold is as follows: During use, the plastic raw material is fed into the feed pipe 3 through the tube body 301. The sealing cap 302 at the top of the tube body is sealed by the latch 303 to prevent material overflow or impurities from entering. The cylinder 401 of the pressing mechanism 4 drives the pressure plate 402 to move downwards. Its bottom arc-shaped surface 403 fits against the inner wall of the mold body 1, applying uniform pressure to the raw material and pushing it into the mold cavity through the feed port 6, reducing residue. The motor 502 of the pushing mechanism 5 drives the lead screw 503 to rotate. The slider 504 moves smoothly along the slide groove 7, driving the cone block 505 to push the raw material towards the dispensing pipe 2. The outer wall of the cone block is parallel to the conical pipe 201, reducing flow resistance. The raw material is guided through the conical pipe 201 threadedly connected by the connecting sleeve 202 and precisely extruded at the dispensing nozzle 203. The tube cap 501 is fixed to the mold body by bolts 506 to ensure the stable operation of the propulsion mechanism. The whole process achieves efficient and stable molding of impact-resistant plastic through the synergy of sealed feeding, uniform pressure, precise pushing and guided extrusion.

Claims

1. An impact-resistant plastic extrusion mold, characterized in that, The mold body (1) includes a feed port (6) on its top surface. The feed port (6) is connected to a feed pipe (3) at its top. The feed pipe (3) includes a pipe body (301). A sealing cap (302) is hinged to the top of the pipe body (301). A pressing mechanism (4) is provided on the top surface of the sealing cap (302). The pressing mechanism (4) includes a cylinder (401). The output end of the cylinder (401) extends into the interior of the pipe body (301) and is connected to a pressure plate (402). The bottom surface of the pressure plate (402) is provided with an arc-shaped curved surface (403). The bottom surface of the arc-shaped curved surface (403) is flush with the inner wall of the mold body (1).

2. The impact-resistant plastic extrusion mold according to claim 1, characterized in that, One end of the mold body (1) is connected to a glue outlet pipe (2), the glue outlet pipe (2) includes a tapered pipe (201), one end of the tapered pipe (201) is fitted with a connecting sleeve (202), and one end of the connecting sleeve (202) is threadedly connected to one end of the mold body (1).

3. The impact-resistant plastic extrusion mold according to claim 2, characterized in that, The tapered pipe (201) has a dispensing nozzle (203) connected to the end away from the connecting sleeve (202).

4. The impact-resistant plastic extrusion mold according to claim 2, characterized in that, One end of the mold body (1) is provided with a propulsion mechanism (5). The propulsion mechanism (5) includes a tube cover (501). A motor (502) is installed on one side of the tube cover (501). The output end of the motor (502) extends into the interior of the mold body (1) and is connected to a lead screw (503). One end of the lead screw (503) is threadedly connected to a slider (504). One end of the slider (504) is connected to a cone block (505).

5. The impact-resistant plastic extrusion mold according to claim 4, characterized in that, The inner walls of the mold body (1) are respectively provided with grooves (7) that engage with the slider (504).

6. The impact-resistant plastic extrusion mold according to claim 5, characterized in that, Bolts (506) are inserted through the outer wall of the tube cap (501), and a screw hole (8) is opened at one end of the mold body (1) to engage with the bolts (506).

7. The impact-resistant plastic extrusion mold according to claim 6, characterized in that, The outer wall of the cone block (505) is parallel to the outer wall of the tapered pipe (201).

8. The impact-resistant plastic extrusion mold according to claim 1, characterized in that, A latch (303) is installed between the tube body (301) and the sealing cap (302).

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