A spiral structure extrusion type forming die and forming method thereof

Abstract

The present invention relates to the technical field of extrusion molding dies, and in particular to a spiral structure extrusion molding die and a molding method thereof, comprising a support leg, wherein two support legs are provided, a support plate is fixedly installed between the two support legs, an injection molding mechanism is installed on the top of the support plate, and the injection molding mechanism comprises an extrusion bin, wherein the extrusion bin is fixedly installed on the top of the support plate, a feed bin is fixedly installed on the top of the extrusion bin, the extrusion bin is connected with the feed bin, the top cover is fixedly installed on the side of the support plate, a feed pipe is provided on the top of the top cover, and a discharge port is provided on the bottom of the support plate. The arrangement of the ejection mechanism of the present invention can automatically eject the mold core of the already molded plastic product without manually waiting for the demolding time, thereby reducing the molding cycle of each product and ensuring that the mold can quickly carry out the next injection molding. Automatic ejection can ensure the integrity and dimensional accuracy of the product during the demolding process.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion molding dies, in particular to a spiral structure extrusion molding die and a molding method thereof. Background Art

[0002] As the requirements for dimensional accuracy and shape accuracy of products continue to increase, the processing accuracy of spiral structure extrusion molding dies is also continuously improving. For example, in the aerospace field, for some precision parts with spiral structures, the dimensional accuracy of the mold is required to reach the micron or even sub-micron level. This requires the use of more advanced processing equipment and processes, such as high-precision CNC machining centers, slow-wire cutting, etc., to ensure the molding accuracy of the mold.

[0003] However, existing injection molds require manual cutting of flash on plastic products during injection molding operations. When manually processing flash, workers need to spend a lot of time using knives, grinding tools, etc. to remove flash on products, which is easily affected by factors such as worker fatigue and skill level, resulting in delays in the entire production process and unable to meet large-scale, high-efficiency production needs. Summary of the invention

[0004] In order to make up for the above deficiencies, the present invention provides a spiral structure extrusion molding die that overcomes the above technical problems or at least partially solves the above problems.

[0005] The present invention is achieved in that:

[0006] The present invention provides a spiral structure extrusion molding die, comprising a support leg, wherein two support legs are provided, a support plate is fixedly installed between the two support legs, an injection molding mechanism is installed on the top of the support plate, and the injection molding mechanism comprises:

[0007] An extrusion bin, the extrusion bin is fixedly mounted on the top of the support plate, a feed bin is fixedly mounted on the top of the extrusion bin, and the extrusion bin is communicated with the feed bin;

[0008] A top cover, the top cover is fixedly mounted on the side of the support plate, a feed pipe is provided on the top of the top cover, a discharge port is provided at the bottom of the support plate, and the discharge port is communicated with the extrusion bin;

[0009] The upper mold is fixedly mounted on the bottom of the top cover by bolts, an upper mold core is fixedly mounted on the bottom of the upper mold, an injection port is opened inside the upper mold core, and the injection port is communicated with a feed pipe.

[0010] In one embodiment of the present invention, a base plate is fixedly installed on the side of the supporting leg, a hydraulic telescopic rod is fixedly installed on the top of the base plate, a telescopic rod is fixedly installed on the top of the base plate, a plurality of telescopic rods are provided, a support seat is fixedly installed on the top of the hydraulic telescopic rod, a first limit plate is fixedly installed on the top of the support seat, an ejection mechanism is installed on the top of the first limit plate, a lower mold is placed inside the first limit plate, a lower mold core is provided on the surface of the lower mold, cutting mechanisms are installed on both sides of the support seat, circulating hoses are fixedly installed on both sides of the first limit plate, a circulating pump is fixedly installed on the side of the base plate, and the top of the circulating pump is fixedly connected to the circulating hose.

[0011] In one embodiment of the present invention, the ejection mechanism includes a side plate, which is fixedly installed on the top of the first limiting plate, and a cross plate is fixedly installed on the side of the side plate, a sliding groove is opened on the surface of the cross plate, and a toothed plate is slidably installed inside the sliding groove, a first threaded cylinder is fixedly installed on the bottom of the top cover, a first threaded rod is rotatably installed on the top of the first limiting plate, and the first threaded rod is threadedly connected to the first threaded cylinder.

[0012] In one embodiment of the present invention, a first gear is rotatably installed on the top of the first limiting plate, a first pulley is rotatably installed on the top of the supporting seat, a second gear is fixedly installed on the top of the first pulley, the first gear is meshed with the second gear, a second pulley is rotatably installed on the top of the supporting seat, and the second pulley is connected to the first pulley by a belt.

[0013] In one embodiment of the present invention, a second threaded barrel is fixedly installed on the top of the second pulley, a second threaded rod is installed on the internal thread of the second threaded barrel, an ejection block is fixedly installed on the top of the second threaded rod, an ejection groove is opened on the surface of the lower mold core, and the ejection groove is slidably connected to the ejection block.

[0014] In one embodiment of the present invention, the cutting mechanism includes a third gear, the third gear is fixedly mounted on the surface of the first threaded rod, the third gear is meshed with a tooth plate, a third threaded rod is fixedly mounted on the side of the tooth plate, a first mounting seat is fixedly mounted on both sides of the support seat, a third pulley is rotatably mounted on the side of the first mounting seat, the third threaded rod penetrates the side of the first mounting seat and is slidably connected to the first mounting seat, and the third threaded rod is threadedly connected to the third pulley.

[0015] In one embodiment of the present invention, a second mounting seat is fixedly installed on both sides of the support seat, a fourth pulley is rotatably installed on the surface of the second mounting seat, the fourth pulley is connected to the third pulley through a belt, a fourth threaded rod is rotatably installed inside the second mounting seat, the fourth threaded rod runs through the entire second mounting seat and is threadedly connected to the fourth pulley, a mounting plate is fixedly installed on the end of the fourth threaded rod, and a second limit plate is fixedly installed on the other end of the fourth threaded rod.

[0016] In one embodiment of the present invention, a limiting rod is slidably installed inside the second mounting seat, and two limiting rods are provided. The two limiting rods are fixedly connected to the second limiting plate, and a fixing plate is fixedly installed on the side of the mounting plate. A cutting knife is slidably installed on the surface of the mounting plate, and a spring is installed between the cutting knife and the fixing plate, and multiple springs are provided.

[0017] In one embodiment of the present invention, a cutting board is fixedly mounted on the side of the mounting plate, a first partition is fixedly mounted on the top of the cutting board, a second partition is fixedly mounted on the top of the cutting knife, electromagnets are fixedly mounted on the bottom of the first partition and the top of the second partition, a sensing button is fixedly mounted on the side of the second mounting seat, and a sensing plate is fixedly mounted on the side of the second limit plate.

[0018] A spiral structure extrusion molding method is applicable to the above-mentioned spiral structure extrusion molding die, and the steps are as follows:

[0019] S1: The staff puts the plastic particles into the feed bin, and the plastic particles enter the extrusion bin through the feed bin to be heated and melted, and move inside the extrusion bin under the action of spiral extrusion;

[0020] S2: Then start the hydraulic telescopic rod to move the entire support seat upward, so that the upper mold core contacts the lower mold core, and the plastic particles enter the injection port through the feed pipe for injection molding;

[0021] S3: When the injection molding is completed, the hydraulic telescopic rod is started to separate the upper mold core from the lower mold core. At the same time, the circulation pump is started to circulate the coolant inside the first limit plate to cool the plastic product.

[0022] S4: When the upper mold is separated from the lower mold, the first threaded barrel moves on the surface of the first threaded rod, so that the first threaded rod rotates, and the ejection block is ejected upward, and the plastic product inside the lower mold core is ejected upward, so as to realize the automatic demoulding operation;

[0023] S5: At the same time, the rotation of the second threaded rod drives the tooth plate to slide inside the sliding groove, so that the cutting knife moves to the top of the burr, and the burr is cut under the action of the electromagnet.

[0024] The invention provides a spiral structure extrusion type forming die, the beneficial effects of which include:

[0025] 1. Through the setting of the ejection mechanism, the mold core of the molded plastic product can be automatically ejected without manual waiting for demoulding time, thereby reducing the molding cycle of each product and ensuring that the mold can quickly carry out the next injection molding. Automatic ejection can ensure the integrity and dimensional accuracy of the product during the demoulding process and reduce the scrap rate.

[0026] 2. Through the setting of the cutting mechanism, the ejected plastic products can be automatically cut off from the flash. The automatic flash cutting system can work closely with the injection molding process and cut the flash immediately after the product is demoulded. There is no need for manual handling and secondary operations, which can make the production process more compact and reduce the turnover time of products in the workshop.

[0027] 3. Through the setting of the injection molding mechanism, driven by the circulating hose and the circulating pump, the coolant can be circulated and cooled inside the first limit plate, so that the injection molded parts can be formed quickly. The rapid cooling enables the mold to prepare for the next injection molding more quickly. When the cooling time of the mold is reduced, the rhythm of the entire injection molding process is accelerated, and the mold can be put into use more frequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the bottom structure of a support plate provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the top structure of the lower mold provided in an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the internal structure of a first limiting plate provided in an embodiment of the present invention;

[0033] Figure 5A schematic diagram of the overall structure of the lower mold provided in an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the ejection mechanism structure provided in an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of the structure of the upper mold from a bottom view provided in an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the structure of a cutting mechanism provided in an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the top structure of the base plate provided in an embodiment of the present invention;

[0038] Fig.10 The embodiments of the present invention provide Figure 4 Schematic diagram of the enlarged structure of part A in the middle.

[0039] In the figure: 1. support leg; 101. support plate; 2. injection molding mechanism; 201. extrusion chamber; 202. feed chamber; 203. top cover; 204. feed pipe; 205. discharge port; 206. upper mold; 207. upper mold core; 208. injection molding port; 209. bottom plate; 210. hydraulic telescopic rod; 211. telescopic rod; 212. support seat; 213. first limit plate; 214. lower mold; 215. lower mold core; 216. circulation hose; 217. circulation pump; 3. ejection mechanism; 301. side plate; 302. cross plate; 303. sliding groove; 304. tooth plate; 305. first threaded barrel; 306. first threaded rod; 307. first gear; 308. first gear Pulley; 309, second gear; 310, second pulley; 311, second threaded cylinder; 312, second threaded rod; 313, ejector block; 314, ejector slot; 4, cutting mechanism; 401, third gear; 402, third threaded rod; 403, first mounting seat; 404, third pulley; 405, second mounting seat; 406, fourth pulley; 407, fourth threaded rod; 408, mounting plate; 409, second limit plate; 410, limit rod; 411, fixing plate; 412, cutting knife; 413, spring; 414, anvil; 4151, first partition; 4152, second partition; 416, electromagnet; 417, induction button; 418, induction plate. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Reference Figure 1-Figure 10The technical solution provides a spiral structure extrusion molding mold, which specifically includes a support leg 1, and the support leg 1 is provided with two. A support plate 101 is fixedly installed between the two support legs 1, and an injection molding mechanism 2 is installed on the top of the support plate 101. The injection molding mechanism 2 includes an extrusion bin 201, a top cover 203 and an upper mold 206. The extrusion bin 201 is fixedly installed on the top of the support plate 101, and a feed bin 202 is fixedly installed on the top of the extrusion bin 201. The staff puts plastic particles into the inside of the feed bin 202, and the plastic particles enter the inside of the extrusion bin 201 through the feed bin 202 to be heated and melted, and at the same time move inside the extrusion bin 201 under the action of spiral extrusion, and the extrusion bin 201 is connected to the feed bin 202. The top cover 203 is fixedly installed on the side of the support plate 101, a feed pipe 204 is provided on the top of the top cover 203, a discharge port 205 is provided at the bottom of the support plate 101, the discharge port 205 is communicated with the extrusion chamber 201, an upper mold 206 is fixedly installed on the bottom of the top cover 203 by bolts, the heated and melted plastic particles enter the feed pipe 204 at the top of the top cover 203 through the discharge port 205 for injection molding, the bolted upper mold 206 can be replaced according to different usage requirements, an upper mold core 207 is fixedly installed on the bottom of the upper mold 206, the shape of the upper mold core 207 can be replaced according to the shape of the plastic product to be produced, and an injection port 208 is provided inside the upper mold core 207. The injection port 208 is connected with the feed pipe 204, and the plastic can enter the injection port 208 through the feed pipe 204 to perform injection molding. A bottom plate 209 is fixedly installed on the side of the support leg 1, and a hydraulic telescopic rod 210 is fixedly installed on the top of the bottom plate 209. A telescopic rod 211 is fixedly installed on the top of the bottom plate 209. There are multiple telescopic rods 211. A support seat 212 is fixedly installed on the top of the hydraulic telescopic rod 210, and a first limiting plate 213 is fixedly installed on the top of the support seat 212. The top of the first limiting plate 213 is installed with an ejection mechanism 3. A lower mold 214 is placed inside the first limiting plate 213, and a lower mold core 215 is opened on the surface of the lower mold 214. Cutting Mechanism 4, both sides of the first limit plate 213 are fixedly installed with a circulation hose 216, the side of the bottom plate 209 is fixedly installed with a circulation pump 217, the top of the circulation pump 217 is fixedly connected to the circulation hose 216, the shape of the lower mold core 215 matches the upper mold core 207, when injection molding is required, the staff puts the plastic particles into the inside of the feed bin 202, and then injects them between the upper mold core 207 and the lower mold core 215 through the heating extrusion of the extrusion bin 201 to form the shape of the plastic product. When the entire injection molding process is completed, the hydraulic telescopic rod 210 is started to move the entire support seat 212 downward to separate the upper mold core 207 from the lower mold core 215. At the same time, during the injection molding, the circulation pump 217 is started.The circulation pump 217 can circulate the coolant in the circulation hose 216 inside the first limit plate 213 to cool the lower mold 214 and speed up the molding time of the plastic product.

[0042] Reference Figure 1-Figure 10 The present embodiment further proposes that the ejection mechanism 3 includes a side plate 301, which is fixedly mounted on the top of the first limiting plate 213. Two side plates 301 are provided, and the two side plates 301 are respectively arranged on both sides of the first limiting plate 213. The sides of the two side plates 301 are fixedly mounted with a transverse plate 302, and the surface of the transverse plate 302 is provided with a sliding groove 303, and a tooth plate 304 is slidably mounted inside the sliding groove 303. A first threaded cylinder 305 is fixedly mounted on the bottom of the top cover 203, and a first threaded rod 306 is rotatably mounted on the top of the first limiting plate 213. The first threaded rod 306 is threadedly connected to the first threaded cylinder 305. When the upper mold 206 is connected to the lower mold 213, the upper mold 206 is connected to the lower mold 213. When the first threaded rod 306 is separated from the first threaded rod 306, the first threaded rod 306 is rotated on the top of the first limiting plate 213. The first gear 307 is rotatably installed on the top of the first limiting plate 213. The first gear 307 is fixedly connected to the first threaded rod 306. The first pulley 308 is rotatably installed on the top of the support seat 212. The second gear 309 is fixedly installed on the top of the first pulley 308. The first gear 307 is meshed with the second gear 309. When the first threaded rod 306 rotates, the first gear 307 can be driven to rotate, and the rotation of the first gear 307 can drive the second gear 309 to rotate. The gear 309 rotates, and the rotation of the second gear 309 can drive the first pulley 308 to rotate. The second pulley 310 is rotatably installed on the top of the support seat 212. The second pulley 310 is connected to the first pulley 308 through a belt. The second threaded cylinder 311 is fixedly installed on the top of the second pulley 310. The second threaded rod 312 is installed on the internal thread of the second threaded cylinder 311. The top of the second threaded rod 312 is fixedly installed with an ejection block 313. The surface of the lower mold core 215 is provided with an ejection groove 314, and the ejection groove 314 is slidably connected with the ejection block 313. When the first pulley 308 rotates, the rotating first pulley 30 8 can drive the second pulley 310 to rotate, and the rotating second pulley 310 can drive the second threaded cylinder 311 to rotate. Driven by the second threaded cylinder 311, the second threaded rod 312 moves upward, and under the action of the ejection block 313 and the ejection groove 314 with a rectangular cross-section, the second threaded rod 312 can be limited, so that the ejection block 313 can slide upward inside the ejection groove 314, and the plastic product inside the lower mold core 215 can be ejected upward, realizing the automatic demoulding operation, and the ejection block 313 and the ejection groove 314 are tightly fitted, and the plastic will not flow into the gap during injection molding.

[0043] reference Figure 1-Figure 10The present embodiment further proposes that the cutting mechanism 4 includes a third gear 401, which is fixedly mounted on the surface of the first threaded rod 306, and the third gear 401 is meshed with the tooth plate 304. When the first threaded rod 306 rotates, the third gear 401 can be driven to rotate, and the rotating third gear 401 can drive the tooth plate 304 to slide inside the sliding groove 303. The side of the tooth plate 304 is fixedly mounted with a third threaded rod 402, and the sliding of the tooth plate 304 can drive the third threaded rod 402 to move. The first mounting seat 403 is fixedly mounted on both sides of the support seat 212, and the side of the first mounting seat 403 is rotatably mounted with a third pulley 404. The third threaded rod 402 penetrates the side of the first mounting seat 403. The third threaded rod 402 is threadedly connected to the third pulley 404, and the movement of the third threaded rod 402 can drive the third pulley 404 to rotate. Second mounting seats 405 are fixedly installed on both sides of the support seat 212, and a fourth pulley 406 is rotatably installed on the surface of the second mounting seat 405. The fourth pulley 406 is connected to the third pulley 404 through a belt. The rotation of the third pulley 404 can drive the fourth pulley 406 to rotate, and a fourth threaded rod 407 is rotatably installed inside the second mounting seat 405. The fourth threaded rod 407 runs through the entire second mounting seat 405 and is threadedly connected to the fourth pulley 406. The rotation of the fourth pulley 406 can drive the fourth threaded rod 40 7 moves inside the second mounting seat 405, a mounting plate 408 is fixedly installed at the end of the fourth threaded rod 407, a second limit plate 409 is fixedly installed at the other end of the fourth threaded rod 407, a limit rod 410 is slidably installed inside the second mounting seat 405, two limit rods 410 are provided, and the two limit rods 410 are fixedly connected to the second limit plate 409, a fixing plate 411 is fixedly installed on the side of the mounting plate 408, a cutting knife 412 is slidably installed on the surface of the mounting plate 408, a spring 413 is installed between the cutting knife 412 and the fixing plate 411, and a plurality of springs 413 are provided, an anvil plate 414 is fixedly installed on the side of the mounting plate 408, a first partition plate 4151 is fixedly installed on the top of the anvil plate 414, and a cutting knife 412 is fixedly installed on the surface of the mounting plate 408. A second partition plate 4152 is fixedly installed on the top, an electromagnet 416 is fixedly installed on the bottom of the first partition plate 4151 and the top of the second partition plate 4152, a sensing button 417 is fixedly installed on the side of the second mounting seat 405, and a sensing plate 418 is fixedly installed on the side of the second limiting plate 409. When the upper mold 206 is separated from the lower mold 214, the second threaded rod 312 rotates, and the rotation of the second threaded rod 312 can drive the tooth plate 304 to slide inside the sliding groove 303, and the sliding of the tooth plate 304 can drive the third threaded rod 402 to move, and the movement of the third threaded rod 402 can drive the third pulley 404 to rotate, and the rotation of the third pulley 404 can drive the fourth pulley 406 to rotate.The rotating fourth pulley 406 can drive the fourth threaded rod 407 to move inside the second mounting seat 405, thereby driving the mounting plate 408 to move. The movement of the mounting plate 408 can move the cutting knife 412 forward, so that the burrs of the plastic product are at the bottom of the cutting knife 412. When the sensing plate 418 on the side of the second limiting plate 409 contacts the sensing button 417, the electromagnet 416 can be started. Under the action of the electromagnet 416, the cutting knife 412 can move downward to cut the burrs of the plastic product. After the burrs of the plastic product are cut, the staff can directly take the plastic product out of the lower mold 214, and then start the hydraulic telescopic rod 210 to move the hydraulic telescopic rod 210 upward, so that the upper mold 206 and the lower mold 214 are re-inserted together to complete the next injection molding operation.

[0044] Reference Figure 1-Figure 10 This embodiment also proposes a spiral structure extrusion molding method, which is applicable to the above-mentioned spiral structure extrusion molding die, and the steps are as follows:

[0045] S1: The staff puts the plastic particles into the feed bin 202, and the plastic particles enter the extrusion bin 201 through the feed bin 202 to be heated and melted, and move inside the extrusion bin 201 under the action of spiral extrusion;

[0046] S2: Then the hydraulic telescopic rod 210 is started to move the entire support seat 212 upward, so that the upper mold core 207 is in contact with the lower mold core 215, and the plastic particles enter the injection port 208 through the feed pipe 204 for injection molding;

[0047] S3: After the injection molding is completed, the hydraulic telescopic rod 210 is started to separate the upper mold core 207 from the lower mold core 215. At the same time, the circulation pump 217 is started to circulate the coolant inside the first limiting plate 213 to cool the plastic product.

[0048] S4: When the upper mold 206 is separated from the lower mold 214, the first threaded cylinder 305 moves on the surface of the first threaded rod 306, so that the first threaded rod 306 rotates, and the ejection block 313 is ejected upward, and the plastic product inside the lower mold core 215 is ejected upward, so as to realize the automatic demoulding operation;

[0049] S5: At the same time, the rotation of the second threaded rod 312 drives the tooth plate 304 to slide inside the sliding groove 303, so that the cutting knife 412 moves to the top of the burr, and under the action of the electromagnet 416, the burr is cut.

[0050] Specifically, the working process or working principle of the spiral structure extrusion molding mold is as follows: first, the staff puts the plastic particles into the feed bin 202, and the plastic particles enter the extrusion bin 201 through the feed bin 202 to be heated and melted, and at the same time move inside the extrusion bin 201 under the action of spiral extrusion. When the entire injection molding process is completed, the hydraulic telescopic rod 210 is started to move the entire support seat 212 downward to separate the upper mold core 207 from the lower mold core 215. At the same time, during the injection molding, the circulation pump 217 is started. The circulation pump 217 can circulate the coolant inside the circulation hose 216 inside the first limit plate 213, so as to cool the lower mold 214 and speed up the molding time of the plastic product.

[0051] When the upper mold 206 is separated from the lower mold 214, the first threaded cylinder 305 moves on the surface of the first threaded rod 306, so that the first threaded rod 306 rotates on the top of the first limit plate 213. When the first threaded rod 306 rotates, the first gear 307 can be driven to rotate, and the rotation of the first gear 307 can drive the second gear 309 to rotate. The rotation of the second gear 309 can drive the first pulley 308 to rotate. When the first pulley 308 rotates, the rotating first pulley 308 The second pulley 310 can be driven to rotate, and the rotating second pulley 310 can drive the second threaded cylinder 311 to rotate. Driven by the second threaded cylinder 311, the second threaded rod 312 moves upward, and under the action of the ejection block 313 and the ejection groove 314 with a rectangular cross-section, the second threaded rod 312 can be limited, so that the ejection block 313 can slide upward inside the ejection groove 314, and the plastic product inside the lower mold core 215 can be ejected upward, thereby realizing the automatic demoulding operation.

[0052] When the upper mold 206 is separated from the lower mold 214, the second threaded rod 312 rotates, and the rotation of the second threaded rod 312 can drive the tooth plate 304 to slide inside the sliding groove 303. The sliding of the tooth plate 304 can drive the third threaded rod 402 to move, and the movement of the third threaded rod 402 can drive the third pulley 404 to rotate, and the rotation of the third pulley 404 can drive the fourth pulley 406 to rotate, and the rotating fourth pulley 406 can drive the fourth threaded rod 407 to move inside the second mounting seat 405, thereby driving the mounting plate 408 to move, and the movement of the mounting plate 408 can make the cutting knife 412 move forward, so that the burr of the plastic product is at the bottom of the cutting knife 412, and when the sensing plate 418 on the side of the second limiting plate 409 contacts the sensing button 417, the electromagnet 416 can be started, and under the action of the electromagnet 416, the cutting knife 412 can move downward, so as to cut the burr of the plastic product.

Claims

1. A spiral structure extrusion molding die, comprising a support leg (1), wherein two support legs (1) are provided, and a support plate (101) is fixedly installed between the two support legs (1), characterized in that: An injection molding mechanism (2) is installed on the top of the support plate (101), and the injection molding mechanism (2) comprises: An extrusion bin (201), the extrusion bin (201) being fixedly mounted on the top of the support plate (101), a feed bin (202) being fixedly mounted on the top of the extrusion bin (201), the extrusion bin (201) being in communication with the feed bin (202); A top cover (203), the top cover (203) being fixedly mounted on a side of the support plate (101), a feed pipe (204) being provided at the top of the top cover (203), and a discharge port (205) being provided at the bottom of the support plate (101), the discharge port (205) being in communication with the extrusion bin (201); An upper mold (206), the upper mold (206) being fixedly mounted on the bottom of the top cover (203) by means of bolts, an upper mold core (207) being fixedly mounted on the bottom of the upper mold (206), an injection port (208) being provided inside the upper mold core (207), and the injection port (208) being connected to the feed pipe (204); A bottom plate (209) is fixedly mounted on the side of the support leg (1); a hydraulic telescopic rod (210) is fixedly mounted on the top of the bottom plate (209); a telescopic rod (211) is fixedly mounted on the top of the bottom plate (209); a plurality of telescopic rods (211) are provided; a support seat (212) is fixedly mounted on the top of the hydraulic telescopic rod (210); a first limit plate (213) is fixedly mounted on the top of the support seat (212); and the top of the first limit plate (213) is installed An ejection mechanism (3) is provided, a lower mold (214) is placed inside the first limiting plate (213), a lower mold core (215) is provided on the surface of the lower mold (214), cutting mechanisms (4) are installed on both sides of the support seat (212), circulation hoses (216) are fixedly installed on both sides of the first limiting plate (213), a circulation pump (217) is fixedly installed on the side of the bottom plate (209), and the top of the circulation pump (217) is fixedly connected to the circulation hose (216); The ejection mechanism (3) comprises a side plate (301), wherein the side plate (301) is fixedly mounted on the top of the first limiting plate (213), a transverse plate (302) is fixedly mounted on the side of the side plate (301), a sliding groove (303) is provided on the surface of the transverse plate (302), a tooth plate (304) is slidably mounted inside the sliding groove (303), a first threaded barrel (305) is fixedly mounted on the bottom of the top cover (203), a first threaded rod (306) is rotatably mounted on the top of the first limiting plate (213), and the first threaded rod (306) is threadedly connected to the first threaded barrel (305); A first gear (307) is rotatably mounted on the top of the first limiting plate (213), a first belt pulley (308) is rotatably mounted on the top of the support seat (212), a second gear (309) is fixedly mounted on the top of the first belt pulley (308), the first gear (307) is meshed with the second gear (309), a second belt pulley (310) is rotatably mounted on the top of the support seat (212), and the second belt pulley (310) is connected to the first belt pulley (308) via a belt; A second threaded barrel (311) is fixedly mounted on the top of the second pulley (310); a second threaded rod (312) is installed on the inner thread of the second threaded barrel (311); an ejection block (313) is fixedly mounted on the top of the second threaded rod (312); an ejection groove (314) is formed on the surface of the lower mold core (215); and the ejection groove (314) is slidably connected to the ejection block (313); The cutting mechanism (4) comprises a third gear (401), the third gear (401) is fixedly mounted on the surface of the first threaded rod (306), the third gear (401) is meshed with the tooth plate (304), a third threaded rod (402) is fixedly mounted on the side of the tooth plate (304), a first mounting seat (403) is fixedly mounted on both sides of the support seat (212), a third pulley (404) is rotatably mounted on the side of the first mounting seat (403), the third threaded rod (402) penetrates the side of the first mounting seat (403) and is slidably connected to the first mounting seat (403), and the third threaded rod (402) is threadedly connected to the third pulley (404); A second mounting seat (405) is fixedly mounted on both sides of the support seat (212); a fourth pulley (406) is rotatably mounted on the surface of the second mounting seat (405); the fourth pulley (406) is connected to the third pulley (404) via a belt; a fourth threaded rod (407) is rotatably mounted inside the second mounting seat (405); the fourth threaded rod (407) runs through the entire second mounting seat (405) and is threadedly connected to the fourth pulley (406); a mounting plate (408) is fixedly mounted on the end of the fourth threaded rod (407); and a second limit plate (409) is fixedly mounted on the other end of the fourth threaded rod (407); A limiting rod (410) is slidably mounted inside the second mounting seat (405), two limiting rods (410) are provided, and the two limiting rods (410) are fixedly connected to the second limiting plate (409); a fixing plate (411) is fixedly mounted on the side of the mounting plate (408); a cutting knife (412) is slidably mounted on the surface of the mounting plate (408); a spring (413) is installed between the cutting knife (412) and the fixing plate (411), and a plurality of springs (413) are provided; A cutting board (414) is fixedly mounted on the side of the mounting plate (408), a first partition (4151) is fixedly mounted on the top of the cutting board (414), a second partition (4152) is fixedly mounted on the top of the cutting knife (412), an electromagnet (416) is fixedly mounted on the bottom of the first partition (4151) and the top of the second partition (4152), a sensing button (417) is fixedly mounted on the side of the second mounting seat (405), and a sensing plate (418) is fixedly mounted on the side of the second limiting plate (409).

2. A spiral structure extrusion molding method, using the spiral structure extrusion molding die according to claim 1, characterized in that: Here are the steps: S1: A worker puts plastic particles into the interior of the feed bin (202), and the plastic particles enter the interior of the extrusion bin (201) through the feed bin (202) to be heated and melted, and at the same time move inside the extrusion bin (201) under the action of spiral extrusion; S2: Then the hydraulic telescopic rod (210) is started to move the entire support seat (212) upward, so that the upper mold core (207) and the lower mold core (215) are in contact, and the plastic particles enter the injection port (208) through the feed pipe (204) for injection molding; S3: After the injection molding is completed, the hydraulic telescopic rod (210) is started to separate the upper mold core (207) from the lower mold core (215), and at the same time, the circulation pump (217) is started to circulate the coolant inside the first limit plate (213) to cool the plastic product; S4: When the upper mold (206) is separated from the lower mold (214), the first threaded cylinder (305) moves on the surface of the first threaded rod (306), causing the first threaded rod (306) to rotate, so that the ejection block (313) is ejected upward, and the plastic product inside the lower mold core (215) is ejected upward, thereby realizing an automatic demoulding operation; S5: At the same time, the rotation of the second threaded rod (312) drives the toothed plate (304) to slide inside the sliding groove (303), so that the cutting knife (412) moves to the top of the burr, and under the action of the electromagnet (416), the burr is cut.

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