Plastic profile extrusion die and die head assembly

Abstract

The utility model discloses a plastic profile extrusion die and a die head assembly, and relates to the field of plastic profile extrusion, the plastic profile extrusion die comprises a die plate, a fastening assembly, a feeding pipe and the die head assembly, a rotating plate is rotated, an inserting rod in a fixing block is used for inserting an inserting hole in the side face, close to a butt joint block, of the die plate, and then under the action of a tightening spring, the butt joint block is tightened; an inserting rod in the moving block is inserted into an inserting hole in the side face of the side, away from the mounting block, of the template, under the action of a tightening spring on the moving block, the template on the side, away from the mounting block, of the template is tightened through the inserting rod, locking and mounting are convenient, an inner hexagonal wrench drives an inner hexagonal block at one end of a worm to rotate, and therefore through cooperation of the worm and a worm wheel, locking is achieved. And the threaded sleeve drives the threaded shaft to rotate, so that the connecting block drives the flow limiting block to move through the connecting pin, the flow limiting block gradually opens a gap between the flow limiting block and the inclined surface of the end, away from the feeding pipe, of the outer flow guide plate through the inclined surface of the outer surface, and the feeding flow is conveniently adjusted.

Description

Technical Field

[0001] This utility model relates to the field of plastic profile extrusion technology, and in particular to a plastic profile extrusion die and die head assembly. Background Technology

[0002] Plastic profile extrusion is a plastic processing technology that involves heating plastic granules to a molten state and then forcing the molten plastic through a die with a specific cross-sectional shape via the screw of an extruder, thereby continuously producing plastic profiles with a fixed cross-sectional shape. This technology is widely used in the production of various plastic products, such as pipes, sheets, rods, and profiles.

[0003] In the extrusion of plastic profiles, granular raw materials are melted by an extruder and then fed to the die assembly at one end of the extruder. The molten raw materials are guided to the die part through the flow guiding process inside the die assembly, and then extruded through the discharge port of a specific shape inside the die to obtain a workpiece of a specified shape. After cooling and cutting, the desired plastic profile is obtained.

[0004] Existing plastic profile molds mainly consist of several templates and locking plates. After the templates and mold head assembly are installed, locking plates need to be installed on both sides of the templates to improve the tightness between the templates. However, the installation process of existing molds is cumbersome, and changing the molds is time-consuming and laborious, making them inconvenient to use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a plastic profile extrusion mold and a die head assembly.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a plastic profile extrusion mold, comprising a plurality of templates, wherein fastening components are provided on the outer surface of the templates;

[0009] The fastening assembly includes two mating blocks disposed on the upper surface of the template, a plurality of sliding blocks disposed between the two mating blocks, a rotating plate hinged to the outer surface of the mating blocks, two fixed blocks fixedly installed on the outer surface of the rotating plate, two moving blocks slidably disposed inside the rotating plate, insert rods inserted into the interior of the moving blocks and the fixed blocks, tension springs fixedly connected to the outer surface of the fixed blocks and the moving blocks away from the rotating plate, and a tightening spring fixedly connected between the moving blocks and the fixed blocks.

[0010] In a preferred embodiment of the plastic profile extrusion mold of this utility model, two L-shaped limiting blocks are fixedly installed at both ends of the sliding block, and a limiting groove that cooperates with the L-shaped limiting blocks is opened on the outer surface of the mating block.

[0011] In a preferred embodiment of the plastic profile extrusion mold of this utility model, an insert block is fixedly installed on the lower surface of the sliding block, and a slot for cooperating with the insert tube is provided on the upper surface of the template.

[0012] In a preferred embodiment of the plastic profile extrusion mold of this utility model, the template has insertion holes on both sides that cooperate with the insertion rod, a connecting piece is fixedly connected to the end of the insertion rod away from the rotating plate, the end of the tension spring away from the rotating plate is fixedly connected to the outer surface of the connecting piece, and a sliding groove that cooperates with the moving block is opened inside the rotating plate.

[0013] As the mold head assembly described in this utility model, it includes a feeding tube, and a mold head component is disposed between the feeding tube and the template.

[0014] The die head component includes a mounting block fixedly connected to one end of a feeding pipe. A buffer block is fixedly mounted on the end of the mounting block away from the feeding pipe. An external threaded pipe is fixedly connected to the side of the buffer block away from the feeding pipe. The external threaded pipe is threadedly connected to an adjacent die plate. Two external guide plates and two internal guide plates are provided inside the mounting block. A threaded sleeve is movably connected to the inside of the mounting block via a bearing. A threaded rod is threadedly connected inside the threaded sleeve. A connecting block is fixedly connected to the end of the threaded rod away from the feeding pipe. Two flow-limiting blocks are provided on the outer surface of the connecting block.

[0015] In a preferred embodiment of the mold head assembly of this utility model, a worm gear is fixedly connected to the outer surface of the threaded sleeve, a worm is provided inside the mounting block, the worm is meshed with the worm gear, and one end of the worm passes through the outer surface of the mounting block and is fixedly connected to an internal hexagon block.

[0016] In a preferred embodiment of the mold head assembly of this utility model, the flow limiting block is disposed between the outer guide plate and the inner guide plate, and the outer surface of the flow limiting block and the end of the outer guide plate away from the feeding pipe are both provided with inclined surfaces. A connecting pin is fixedly connected between the flow limiting block and the connecting block, and a limiting groove that cooperates with the connecting pin is opened inside the inner guide plate.

[0017] In a preferred embodiment of the mold head assembly described in this utility model, the flow limiting block always maintains a closed seal on the internal limiting groove of the inner guide plate.

[0018] As a preferred embodiment of the mold head assembly of this utility model, the mounting block is provided with a feed inlet for feeding on the side near the feeding pipe. The width of the feed inlet, the width of the outer guide plate, and the width of the inner guide plate are all the same. The mounting block has a guide groove inside that cooperates with the outer guide plate and the inner guide plate. The buffer block has a cavity inside.

[0019] (III) Beneficial Effects

[0020] This utility model provides a plastic profile extrusion die and die head assembly. It has the following beneficial effects:

[0021] 1. Rotate the rotating plate, and insert the rod inside the fixed block into the insertion hole on the side of the template near the docking block. Then, under the action of the tightening spring, insert the rod inside the moving block into the insertion hole on the side of the template away from the mounting block. Under the action of the tightening spring on the moving block, the template away from the mounting block is tightened by the rod, achieving locking and making installation convenient.

[0022] 2. By using an Allen wrench to rotate the Allen block at one end of the worm, the worm and worm wheel work together to rotate the threaded sleeve. The threaded sleeve then rotates the threaded shaft, causing the connecting block to move the flow-limiting block via the connecting pin. This allows the flow-limiting block to gradually open the gap between the outer surface of the flow-limiting block and the outer guide plate at the end away from the feed pipe, facilitating the adjustment of the feed flow rate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] Figure 2 This is an exploded structural diagram of the template of this utility model.

[0026] Figure 3 This is an exploded structural diagram of the fastening component of this utility model.

[0027] Figure 4 This is a schematic diagram of the structure of the sliding block of this utility model.

[0028] Figure 5 This is a schematic diagram of the internal structure of the mounting block of this utility model.

[0029] Figure 6This is an exploded structural diagram of the external guide plate of this utility model.

[0030] In the diagram, 1. Feeding pipe; 2. Template; 3. Fastening assembly; 301. Connecting block; 302. Sliding block; 303. Rotating plate; 304. Insert rod; 305. Tension spring; 306. Moving block; 307. Connecting piece; 308. Fixing block; 309. Tightening spring; 310. Inserting block; 311. L-shaped limiting block; 4. Die head assembly; 401. Mounting block; 402. Buffer block; 403. External threaded pipe; 404. External guide plate; 405. Internal guide plate; 406. Threaded rod; 407. Threaded sleeve; 408. Flow limiting block; 409. Connecting block; 410. Connecting pin; 411. Worm gear; 412. Worm wheel. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0032] Example 1

[0033] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention. This embodiment provides a plastic profile extrusion mold and a die head assembly, including a plurality of templates 2, and fastening components 3 are provided on the outer surface of the templates 2;

[0034] The fastening assembly 3 includes two mating blocks 301 disposed on the upper surface of the template 2, a plurality of sliding blocks 302 disposed between the two mating blocks 301, a rotating plate 303 hinged to the outer surface of the mating blocks 301, two fixing blocks 308 fixedly installed on the outer surface of the rotating plate 303, two moving blocks 306 slidably disposed inside the rotating plate 303, insert rods 304 inserted inside the moving blocks 306 and the fixing blocks 308, tension springs 305 fixedly connected to the side of the outer surface of the fixing blocks 308 and the moving blocks 306 away from the rotating plate 303, and a tightening spring 309 fixedly connected between the moving blocks 306 and the fixing blocks 308.

[0035] Specifically, two L-shaped limiting blocks 311 are fixedly installed at both ends of the sliding block 302. The outer surface of the mating block 301 is provided with a limiting groove that cooperates with the L-shaped limiting block 311. By setting the L-shaped limiting block 311 and the limiting groove, the two mating blocks 301 are connected by the sliding block 302, thus preventing the two mating blocks 301 from falling apart.

[0036] Specifically, the lower surface of the sliding block 302 is fixedly equipped with an insert block 310, and the upper surface of the template 2 is provided with a slot that cooperates with the insert tube. Through the cooperation of the insert block 310 and the slot, when the template 2 needs to be disassembled later, the sliding block 302 can be slid, and the template 2 can be separated in sequence through the cooperation of the insert block 310 and the slot. This avoids the template 2 being difficult to disassemble due to the fastening time process, and does not require the use of other tools to separate the template 2 from the template 2.

[0037] Specifically, both sides of the template 2 are provided with insertion holes that cooperate with the insertion rod 304. The end of the insertion rod 304 away from the rotating plate 303 is fixedly connected to the connecting piece 307. The end of the tension spring 305 away from the rotating plate 303 is fixedly connected to the outer surface of the connecting piece 307. The rotating plate 303 has a sliding groove inside that cooperates with the moving block 306. Through the cooperation of the insertion rod 304 and the insertion hole, the insertion is realized, which facilitates the fastening of the template 2. Through the setting of the tension spring 305 and the connecting piece 307, the insertion rod 304 is prevented from separating from the insertion hole. Through the setting of the sliding groove, the moving block 306 is moved easily.

[0038] Next, place the mating block 301 on the upper surface of the assembled template 2, and move the sliding block 302 so that the sliding block 302 drives the insert block 310 to engage with the slot on the upper surface of the template 2, thereby inserting the insert block 310 into the slot. Then rotate the rotating plate 303. When rotating the rotating plate 303, the insert rod 304 is pulled out through the connecting piece 307, and the position of the mating block 301 relative to the sliding block 302 is adjusted so that the insert rod 304 inside the fixing block 308 on the outer surface of the rotating plate 303 can be aligned with the insertion hole on the side of the template 2 near the mating block 301. After alignment, release the connecting piece 307 corresponding to the insert rod 304 inserted inside the fixing block 308, and then pull... Under the reset action of the extension spring 305, the insertion rod 304 is driven to insert into the insertion hole on the side of the template 2 near the docking block 301. Then, the sliding block 306 is slid so that the insertion rod 304 inside the sliding block 306 is aligned with the insertion hole on the side of the template 2 away from the mounting block 401. After the insertion rod 304 is aligned with the insertion hole, under the action of the extension spring 305, the insertion rod 304 inserted inside the sliding block 306 can be inserted into the insertion hole on the side of the template 2 away from the mounting block 401. At this time, under the action of the tightening spring 309 on the sliding block 306, the template 2 away from the mounting block 401 is tightened by the insertion rod 304, thereby achieving locking and convenient installation.

[0039] Example 2

[0040] Reference Figure 1 , Figure 5 and Figure 6 This is the second embodiment of the present utility model. This embodiment is based on the previous embodiment and includes a feeding pipe 1. A die head component 4 is provided between the feeding pipe 1 and the template 2.

[0041] The die head component 4 includes a mounting block 401 fixedly connected to one end of the feeding pipe 1. A buffer block 402 is fixedly installed at the end of the mounting block 401 away from the feeding pipe 1. An external threaded pipe 403 is fixedly connected to the side of the buffer block 402 away from the feeding pipe 1. The external threaded pipe 403 is threadedly connected to the adjacent die 2. Two external guide plates 404 are provided inside the mounting block 401. Two internal guide plates 405 are provided inside the mounting block 401. A threaded sleeve 407 is movably connected to the inside of the mounting block 401 through a bearing. A threaded rod 406 is threadedly connected inside the threaded sleeve 407. A connecting block 409 is fixedly connected to the end of the threaded rod 406 away from the feeding pipe 1. Two flow-limiting blocks 408 are provided on the outer surface of the connecting block 409.

[0042] Specifically, a worm gear 412 is fixedly connected to the outer surface of the threaded sleeve 407, and a worm 411 is provided inside the mounting block 401. The worm 411 is meshed with the worm gear 412, and one end of the worm 411 passes through the outer surface of the mounting block 401 and is fixedly connected to an internal hexagon block. Through the reverse transmission self-locking effect of the worm gear 412 and the worm 411, the rotation of the threaded sleeve 407 is prevented from causing changes in the adjusted flow rate.

[0043] Specifically, the flow limiting block 408 is disposed between the outer guide plate 404 and the inner guide plate 405. The outer surface of the flow limiting block 408 and the end of the outer guide plate 404 away from the feed pipe 1 are both provided with inclined surfaces. A connecting pin 410 is fixedly connected between the flow limiting block 408 and the connecting block 409. The inner guide plate 405 has a limiting groove that cooperates with the connecting pin 410. Through the cooperation of the inclined surface of the outer surface of the flow limiting block 408 and the inclined surface of the outer guide plate 404 away from the feed pipe 1, the flow limiting block 408 can gradually open the gap between the flow limiting block 408 and the feed pipe 1 as the connecting pin 410 moves with the connecting block 409, thereby achieving the effect of regulating the flow rate.

[0044] Specifically, the flow limiting block 408 always keeps the internal limiting groove of the inner guide plate 405 closed, preventing molten raw materials from flowing into the interior of the inner guide plate 405 from the limiting groove, thus affecting the normal operation of the threaded shaft and threaded sleeve 407.

[0045] Specifically, the mounting block 401 has a feed inlet on the side near the feed pipe 1. The width of the feed inlet, the width of the outer guide plate 404, and the width of the inner guide plate 405 are all the same. The mounting block 401 has a guide groove inside that cooperates with the outer guide plate 404 and the inner guide plate 405. The buffer block 402 has a cavity inside. Through the setting of the feed inlet and the setting of the guide groove inside the mounting block 401, the molten raw material can normally enter between the outer guide plate 404 and the inner guide plate 405, and will not flow into the cavity inside the mounting block 401 used to place the threaded shaft and the threaded sleeve 407. Through the setting of the cavity inside the buffer block 402, the raw material needs to fill the cavity inside the buffer block 402 before feeding, regardless of the flow rate, so as to avoid the phenomenon of material interruption during extrusion feeding when adjusting the flow rate and maintain stable feeding.

[0046] Furthermore, by using an Allen wrench to rotate the Allen block at one end of the worm 411, the worm 411 and the worm wheel 412 work together to rotate the threaded sleeve 407. The threaded sleeve 407 rotates the threaded shaft, which in turn causes the connecting block 409 to move the flow-limiting block 408 via the connecting pin 410. This allows the flow-limiting block 408 to gradually open the gap between itself and the inclined surface of the outer guide plate 404 away from the feed pipe 1 through the inclined surface of its outer surface, thereby achieving the effect of regulating the flow rate.

[0047] Working principle: During the extrusion of the plastic profile, template 2 is installed according to the required profile. The template 2 closest to the buffer block 402 is installed on the buffer block 402 through the external threaded tube 403. Then, the remaining templates 2 are installed on the already fixed templates 2 in sequence. After installation, the mating block 301 is placed on the upper surface of the assembled template 2. The sliding block 302 is moved so that the sliding block 302 drives the insert block 310 to cooperate with the slot on the upper surface of the template 2, thereby inserting the insert block 310 into the slot. Then, the rotating plate 303 is rotated. When rotating the rotating plate 303, the insert rod 304 is pulled out through the connecting piece 307, and the position of the mating block 301 relative to the sliding block 302 is adjusted so that the insert rod 304 inside the fixing block 308 on the outer surface of the rotating plate 303 can be aligned with the insertion hole on the side of the template 2 near the buffer block 402. After alignment, the connecting piece 307 corresponding to the insert rod 304 inserted inside the fixing block 308 is released. Under the reset action of the tension spring 305, the insert rod 304 is driven to insert into the insertion hole on the side of the template 2 near the buffer block 402. Then, the sliding block 306 is slid, so that the sliding block 306... The internal insertion rod 304 is aligned with the insertion hole on the side of the template 2 away from the mounting block 401. After the insertion rod 304 is aligned with the insertion hole, under the action of the tension spring 305, the insertion rod 304, which is inserted inside the moving block 306, can be inserted into the insertion hole on the side of the template 2 away from the mounting block 401. At this time, under the action of the tightening spring 309 on the moving block 306, the template 2 away from the mounting block 401 is tightened by the insertion rod 304, thereby achieving locking and convenient installation. Then, the feeding flow rate is adjusted according to the needs of the extruded profile by using an Allen wrench. The internal hexagonal block at one end of the worm gear 411 rotates, thereby driving the threaded sleeve 407 to rotate through the cooperation of the worm gear 411 and the worm wheel 412. The threaded sleeve 407 drives the threaded shaft to rotate, thereby causing the connecting block 409 to drive the flow limiting block 408 to move through the connecting pin 410. This allows the flow limiting block 408 to gradually open the gap between the outer surface of the inclined surface and the outer guide plate 404 away from the feed pipe 1, thereby achieving the effect of regulating the flow rate. This allows the raw material to be sent into the mold 2 through the buffer block 402 and the external threaded pipe 403, ultimately realizing the extrusion of the plastic profile.

[0048] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A plastic profile extrusion die, comprising a plurality of templates, characterized in that: The outer surface of the template is provided with fastening components; The fastening assembly includes two mating blocks disposed on the upper surface of the template, a plurality of sliding blocks disposed between the two mating blocks, a rotating plate hinged to the outer surface of the mating blocks, two fixed blocks fixedly installed on the outer surface of the rotating plate, two moving blocks slidably disposed inside the rotating plate, insert rods inserted into the interior of the moving blocks and the fixed blocks, tension springs fixedly connected to the outer surface of the fixed blocks and the moving blocks away from the rotating plate, and a tightening spring fixedly connected between the moving blocks and the fixed blocks.

2. The plastic profile extrusion die according to claim 1, characterized in that: Two L-shaped limiting blocks are fixedly installed at both ends of the sliding block, and a limiting groove that cooperates with the L-shaped limiting blocks is opened on the outer surface of the docking block.

3. The plastic profile extrusion die according to claim 2, characterized in that: The lower surface of the sliding block is fixedly equipped with an insert block, and the upper surface of the template is provided with a slot that mates with the insert tube.

4. The plastic profile extrusion die according to claim 3, characterized in that: Both sides of the template are provided with insertion holes that cooperate with the insertion rod. The end of the insertion rod away from the rotating plate is fixedly connected to a connecting piece. The end of the tension spring away from the rotating plate is fixedly connected to the outer surface of the connecting piece. The interior of the rotating plate is provided with a sliding groove that cooperates with the moving block.

5. A die assembly, comprising a feed tube and a plastic profile extrusion die as described in any one of claims 1 to 4, characterized in that: A die head component is provided between the feeding pipe and the template; The die head component includes a mounting block fixedly connected to one end of the feeding pipe. A buffer block is fixedly mounted on the end of the mounting block away from the feeding pipe. An external threaded pipe is fixedly connected to the side of the buffer block away from the feeding pipe. The external threaded pipe is threadedly connected to the adjacent die head. Two external guide plates and two internal guide plates are provided inside the mounting block. A threaded sleeve is movably connected to the inside of the mounting block through a bearing. A threaded rod is threadedly connected inside the threaded sleeve. A connecting block is fixedly connected to the end of the threaded rod away from the feeding pipe. Two flow-limiting blocks are provided on the outer surface of the connecting block.

6. The die head assembly according to claim 5, characterized in that: A worm gear is fixedly connected to the outer surface of the threaded sleeve, and a worm is provided inside the mounting block. The worm meshes with the worm gear, and one end of the worm passes through the outer surface of the mounting block and is fixedly connected to an internal hexagon block.

7. The die head assembly according to claim 6, characterized in that: The flow limiting block is disposed between the outer guide plate and the inner guide plate. The outer surface of the flow limiting block and the end of the outer guide plate away from the feed pipe are both provided with inclined surfaces. A connecting pin is fixedly connected between the flow limiting block and the connecting block. A limiting groove that cooperates with the connecting pin is opened inside the inner guide plate.

8. The die head assembly according to claim 7, characterized in that: The flow-limiting block always keeps the internal limiting groove of the inner guide plate closed.

9. The die head assembly according to claim 8, characterized in that: The mounting block has a feed inlet on the side near the feeding pipe. The width of the feed inlet, the width of the outer guide plate, and the width of the inner guide plate are all the same. The mounting block has a guide groove inside that cooperates with the outer guide plate and the inner guide plate. The buffer block has a cavity inside.

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