Liner tube blank extrusion die
By designing a liner blank extrusion mold including die body, shunt shuttle and die core, the problems of insufficient compaction and inconsistent flow direction during the molding of molten materials in the prior art are solved, and the full compaction and stable extrusion of the materials are achieved, and the product quality is improved.
Patent Information
- Application Number
- CN202422284764.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In existing liner product processing equipment, the molten material is not compacted sufficiently during the molding process, has pressure relief points, poor extrusion stability, and inconsistent material flow direction, resulting in poor product quality.
A liner blank extrusion mold including a die body, a shunt shuttle and a die core is designed. Through a molding cavity with a narrow front and a wide rear and a tapered cavity with a wide front and a narrow back, the structure of the shunt shuttle and a die core is combined to ensure the flow rate balance of the molten material in the mold and the compaction rectification.
The full compaction and stable extrusion of the molten material are achieved, ensuring the consistency of the flow direction of the material, avoiding blind spots and secondary vortex, and improving product quality.
Smart Images
Figure CN222946165U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile control cable product processing auxiliary devices, and in particular relates to a liner blank extrusion die. Background Art
[0002] The interior of automotive control cable products requires inner lining tubes, which are basically made of PA, PP, PE, POM and other materials. In the existing lining tube product processing equipment, the molten material is not compacted sufficiently from entering the mold cavity to extrusion, and there are often pressure relief points and poor extrusion stability in the intermediate process. At the same time, the extrusion process cannot ensure the consistency of the material flow direction, and there are dead corners or secondary eddy currents in the material, which seriously affect the quality of the lining tube products. Therefore, it is necessary to improve the lining tube blank forming mold of the lining tube products in the prior art. Utility Model Content
[0003] The utility model aims at solving the above-mentioned problems and provides a liner blank extrusion die which can compact and rectify the molten material, fully compact it, ensure that there will be no pressure relief points in the intermediate process, maintain the stability of extrusion, and ensure that the material flow direction is consistent during the extrusion process, effectively prevent the occurrence of dead corners or secondary eddy currents in the material, thereby improving the product quality.
[0004] The technical scheme adopted by the utility model is as follows: the liner billet extrusion die includes a die body, characterized in that: a molding cavity which is narrow in front and wide in the back is arranged inside the die body, and a molten material inlet is arranged at the front end of the die body; and a mouth die is arranged at the rear of the die body, a tapered cavity which is wide in front and narrow in the back is arranged inside the mouth die, and a liner billet extrusion port is arranged at the rear end of the tapered cavity, and the mouth die is connected to the rear of the die body through a pressure cover, and the pressure cover is detachably connected to the die body by connecting bolts; a diverter shuttle is arranged in the molding cavity of the die body, a die core is arranged in the tapered cavity of the mouth die, and the front end of the die core is fixedly connected to the rear end of the diverter shuttle. So that the molten material enters the molding cavity from the molten material inlet at the connection between the extrusion die and the extruder barrel, and the raw material is compacted and rectified by the diverter shuttle; then, the raw material enters the mouth die, and is extruded from the liner billet extrusion port at a uniform speed through the gap between the mouth die and the die core.
[0005] The diverter shuttle includes a shuttle body, a diverter expansion cone is provided on one side of the shuttle body facing the molten material inlet, a core connection part for connecting with the mold core is provided on the other side of the shuttle body, and a plurality of groups of diverter arc through holes arranged along the same circumference are provided on the bottom of the diverter expansion cone and the shuttle body of the diverter shuttle. The diverter shuttle is connected to the mold core at the rear through the core connection part, and the expansion angle of the diverter expansion cone located in the molding cavity and the plurality of groups of diverter arc through holes are used to ensure the flow rate balance of the molten material inside the mold body and compact the molten material.
[0006] The number of the diversion arc-shaped through holes is three evenly spaced, so as to fully balance the flow rate of the molten material and facilitate the arrangement of the blowing channel.
[0007] The mold core comprises a core body, an outer wall of the core body is provided with a molding shrinkage cone surface, one end of the core body is provided with a shuttle connection part for connecting with a diverter shuttle, and the other end of the core body is connected with the liner blank extrusion port at the end of the die. The shuttle connection part is used to connect the mold core with the diverter shuttle in front, and the shrinkage angle of the molding shrinkage cone surface located in the conical cavity is used to fully compact the molten material in the process from entering the molding cavity to extruding from the die. At the same time, it is ensured that there is no pressure relief point in the intermediate process, the stability of extrusion is maintained, and the extrusion process ensures that the material flow direction is consistent, effectively preventing the occurrence of dead corners or secondary vortexes in the material.
[0008] The mold body is provided with a forming blow hole, which is connected to the split shuttle and the tube cavity forming blow channel provided inside the mold core; and the outlet of the tube cavity forming blow channel is located in the middle of the liner blank extrusion port, so that the molten material is fully rectified and compacted inside the extrusion mold and extruded from the liner blank extrusion port at the end of the die, and during the extrusion process, air is continuously blown into the tube cavity forming blow channel from the forming blow hole, thereby ensuring that the liner enters the subsequent shaping mold in the shape of a round tube under the action of the traction machine.
[0009] The shuttle body of the diverter shuttle is provided with an internal shuttle blowing channel, one end of which is connected to the forming blowing hole on the mold body, and the other end of which is connected to the blowing channel on the mold core, so that the internal shuttle blowing channel and the blowing channel on the mold core form a tube cavity forming blowing channel.
[0010] The core body of the mold core is provided with an inner core blowing channel, one end of which is connected to the blowing channel on the diverter shuttle, and the other end of which is connected to the extrusion port of the liner blank, so that the inner core blowing channel and the blowing channel on the diverter shuttle form a tube cavity forming blowing channel.
[0011] The liner blank extrusion die is arranged at the outlet of an extruder for melting and uniformly extruding raw materials, the inlet of the extruder is provided with a drying barrel, and a segmented water tank is arranged at the rear of the extruder, the segmented water tank includes a water tank forming area arranged near the side of the extruder outlet, the rear end of the water tank forming area is sequentially extended with a water tank cooling area and a water tank high temperature area, and partition plates are respectively arranged between each area of the segmented water tank, and the partition plates are provided with through holes corresponding to the shape of the liner product. The liner product can be quickly shaped in the water tank forming area to ensure the product size requirements and surface requirements; and because the water tank cooling area adopts a water immersion cooling method, the liner product can dissipate heat evenly and quickly to prevent the liner from bending and insufficient cooling; and the water tank high temperature area is heated by a heating pipe to effectively eliminate the internal stress of the liner material.
[0012] The beneficial effects of the utility model are as follows: since the utility model adopts a mold main body, a molding cavity which is narrow at the front and wide at the rear is arranged inside the mold main body, a molten material inlet is arranged at the front end of the mold main body, a mouth die is arranged at the rear of the mold main body, a tapered cavity which is wide at the front and narrow at the rear is arranged inside the mouth die, a liner blank extrusion port is arranged at the rear end of the tapered cavity, and the mouth die is connected to the rear part of the mold main body through a pressure cover; a diverter shuttle is arranged in the molding cavity of the mold main body, a mold core is arranged in the tapered cavity of the mouth die, and the front end of the mold core is fixedly connected to the rear end of the diverter shuttle, so the design is reasonable and the structure is compact, the molten material can be compacted and rectified, and the compaction is sufficient to ensure that there is no pressure relief point in the intermediate process, the stability of extrusion is maintained, and the extrusion process can ensure that the material flow direction is consistent, effectively preventing the occurrence of dead corners or secondary vortexes in the material, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model.
[0014] Figure 2 yes Figure 1 A structural schematic diagram of the diversion shuttle in FIG.
[0015] Figure 3 yes Figure 2 Section view along line AA.
[0016] Figure 4 yes Figure 1 A structural schematic diagram of the mold core.
[0017] Explanation of the serial numbers in the figure: 1 mold body, 2 molding cavity, 3 diverter shuttle, 4 die, 5 conical cavity, 6 mold core, 7 pressure cover, 8 connecting bolts, 9 molten material inlet, 10 liner blank extrusion port, 11 molding blow hole, 12 tube inner cavity molding blow channel, 13 shuttle body, 14 diverter expansion cone, 15 diverter arc through hole, 16 core connection part, 17 shuttle inner blowing channel, 18 core body, 19 molding contraction cone, 20 shuttle connection part, 21 core inner blowing channel. DETAILED DESCRIPTION
[0018] according to Figures 1 to 4 The specific structure of the utility model is described in detail. The liner billet extrusion die comprises a die body 1, wherein a molding cavity 2 which is narrow at the front and wide at the rear is arranged inside the die body 1, and a molten material inlet 9 is arranged at the front end of the die body 1. In addition, a mouth die 4 is arranged at the rear of the die body 1, wherein a tapered cavity 5 which is wide at the front and narrow at the rear is arranged inside the mouth die 4, and a liner billet extrusion port 10 is arranged at the rear end of the tapered cavity 5, and the mouth die 4 is connected to the rear of the die body 1 through a pressure cover 7, and the pressure cover 7 is detachably connected to the die body 1 by means of connecting bolts 8. A diverter shuttle 3 is arranged in the molding cavity 2 of the die body 1, and a mold core 6 is arranged in the tapered cavity 5 of the mouth die 4, and the front end of the mold core 6 is fixedly connected to the rear end of the diverter shuttle 3. At the same time, the mold body 1 is also provided with a molding blow hole 11, which is connected to the tube cavity molding blow channel 12 provided inside the diverter shuttle 3 and the mold core 6, and the outlet of the tube cavity molding blow channel 12 is located in the middle of the liner blank extrusion port 10. Thus, the molten material enters the molding cavity 2 from the molten material inlet 9 at the connection between the extrusion die and the extruder barrel, and is compacted and rectified by the diverter shuttle 3; then, the molten material enters the die 4, and is extruded from the liner blank extrusion port 10 at a uniform speed through the gap between the die 4 and the mold core 6. Subsequently, the tractor pulls the extruded liner blank into the subsequent shaping die.
[0019] The diverter shuttle 3 is composed of a shuttle body 13, on which a diverter expansion cone 14 is arranged on the side of the shuttle body 13 of the diverter shuttle 3 facing the molten material inlet 9, and a core connecting portion 16 for connecting to the mold core 6 is arranged on the other side of the shuttle body 13, and three groups of diverter arc through holes 15 evenly distributed along the same circumference are arranged on the bottom of the diverter expansion cone 14 and the shuttle body 13 of the diverter shuttle 3; the number of the diverter arc through holes 15 can be set to three with equal spacing and uniform distribution to fully balance the flow rate of the molten material and facilitate the arrangement of the blowing channel.
[0020] An in-shuttle blowing channel 17 is also provided inside the shuttle body 13 of the diverter shuttle 3, one end of the in-shuttle blowing channel 17 is connected to the molding blowing hole 11 on the mold body 1, and the other end of the in-shuttle blowing channel 17 is connected to the core blowing channel 21 on the mold core 6; then the diverter shuttle 3 is connected to the rear mold core 6 through the core connecting portion 16, and the expansion angle of the diverter expansion cone 14 located in the molding cavity 2 and a plurality of groups of diverter arc through holes 15 are utilized to ensure the flow velocity balance of the molten material inside the mold body and to compact the molten material; at the same time, the in-shuttle blowing channel 17 and the core blowing channel 21 on the mold core 6 are utilized to form the tube cavity molding blowing channel 12.
[0021] The mold core 6 is composed of a core body 18, and a molding shrinkage cone 19 is also arranged on the outer wall of the core body 18 of the mold core 6. A shuttle connection part 20 for connecting with the diverter shuttle 3 is arranged at one end of the core body 18, and the other end of the core body 18 is connected to the liner blank extrusion port 10 at the end of the die 4; and an inner core blowing channel 21 is also arranged inside the core body 18 of the mold core 6, and one end of the inner core blowing channel 21 is connected with the inner shuttle blowing channel 17 on the diverter shuttle 3, and the other end of the inner core blowing channel 21 is connected with the liner blank extrusion port 10; the shuttle connection part 20 is used to connect the mold core 6 with the front diverter shuttle 3, and the shrinkage angle of the molding shrinkage cone 19 located in the conical cavity 5 is used to make the molten material fully compacted in the process from entering the molding cavity 2 to being extruded from the die 4; at the same time, it is ensured that there will be no pressure relief points in the intermediate process, the stability of extrusion is maintained, and the material flow direction is consistent during the extrusion process, effectively preventing the occurrence of dead corners or secondary vortexes in the material.
[0022] The liner blank extrusion die for extruding the molten material into the liner blank is arranged at the outlet of the extruder for melting and uniformly extruding the raw material (plastic particles), and the inlet of the extruder is provided with a drying barrel for drying and dehumidifying the plastic particles. A segmented water trough is arranged behind the extruder, and a shaping mold is also arranged at the front end of the water trough forming area in front of the segmented water trough. The shaping mold is arranged in alignment with the extrusion mold, and the shaping mold is slightly lower than the extrusion mold. The segmented water trough includes a water trough forming area arranged on the side close to the extruder outlet, and the shaping mold can be arranged at the front end of the water trough forming area; the rear end of the water trough forming area is sequentially extended with a water trough cooling area and a water trough high temperature area; and, partition plates are respectively arranged between each area of the segmented water trough, and through holes corresponding to the shape of the liner product are arranged on the partition plates. Furthermore, the liner product can be quickly shaped in the water tank forming area to ensure that the product size and surface requirements are met. In addition, since the water tank cooling area adopts water immersion cooling, the liner product can dissipate heat evenly and quickly to prevent the liner from bending and insufficient cooling. Later, the high temperature area of the water tank is heated by a heating pipe to effectively eliminate the internal stress of the liner material and improve product quality.
[0023] When the liner blank extrusion die is used, first, the raw materials (plastic particles) after drying and dehumidification enter the extruder, and are melted and extruded at a uniform speed by the extruder, and then the molten material enters the molding cavity 2 from the molten material inlet 9 at the connection between the extrusion die and the extruder barrel, and the expansion angle of the diversion expansion cone 14 located in the molding cavity 2 and the plurality of groups of diversion arc through holes 15 are used to ensure the balance of the flow rate of the molten material inside the die body and compact the molten material. Subsequently, the molten material enters the die 4, and the contraction angle of the molding contraction cone 19 located in the conical cavity 5 is used to fully compact the molten material in the process from entering the molding cavity 2 to extruding the die 4. After that, the liner blank is extruded from the liner blank extrusion port 10 at a uniform speed; at the same time, during the extrusion process, air is continuously blown into the molding blowing channel 12 of the tube cavity from the molding blowing hole 11, thereby ensuring that the liner enters the subsequent shaping die in the shape of a round tube under the action of the traction machine. It can be understood that, according to specific usage requirements, after the liner blank extrusion mold is replaced with a correspondingly shaped die, it is also suitable for the extrusion of other molded rubber strip products (for example, car window sealing strips, etc.).
Claims
1. A liner blank extrusion die, comprising a die body (1), characterized in that: The mold body (1) is provided with a molding cavity (2) which is narrow at the front and wide at the rear, and a molten material inlet (9) is provided at the front end of the mold body (1); and a mouth die (4) is provided at the rear of the mold body (1), and a conical cavity (5) which is wide at the front and narrow at the rear is provided inside the mouth die (4), and a liner blank extrusion port (10) is provided at the rear end of the conical cavity (5), and the mouth die (4) is connected to the rear of the mold body (1) via a pressure cover (7), and the pressure cover (7) is detachably connected to the mold body (1) by means of connecting bolts (8); a diverter shuttle (3) is provided in the molding cavity (2) of the mold body (1), and a mold core (6) is provided in the conical cavity (5) of the mouth die (4), and the front end of the mold core (6) is fixedly connected to the rear end of the diverter shuttle (3).
2. The liner blank extrusion die according to claim 1, characterized in that: The flow-dividing shuttle (3) comprises a shuttle body (13), a flow-dividing expansion cone (14) is provided on one side of the shuttle body (13) facing the molten material inlet (9), a core connecting portion (16) for connecting to a mold core (6) is provided on the other side of the shuttle body (13), and a plurality of groups of flow-dividing arc through holes (15) arranged along the same circumference are provided on the bottom of the flow-dividing expansion cone (14) and the shuttle body (13) of the flow-dividing shuttle (3).
3. The liner blank extrusion die according to claim 2, characterized in that: The number of the diversion arc-shaped through holes (15) is three and is evenly spaced.
4. The liner blank extrusion die according to claim 1, characterized in that: The mold core (6) comprises a core body (18), an outer wall of which is provided with a molding shrinkage cone (19), one end of the core body (18) is provided with a shuttle connection portion (20) for connecting to a diversion shuttle (3), and the other end of the core body (18) is connected to a liner blank extrusion port (10) at the end of the die (4).
5. The liner blank extrusion die according to claim 1, characterized in that: The mold body (1) is provided with a molding blow hole (11), which is connected to the diverter shuttle (3) and a tube inner cavity molding blow channel (12) provided inside the mold core (6); and the outlet of the tube inner cavity molding blow channel (12) is located in the middle of the liner blank extrusion port (10).
6. The liner blank extrusion die according to claim 5, characterized in that: An internal shuttle blowing channel (17) is provided inside the shuttle body (13) of the diverter shuttle (3); one end of the internal shuttle blowing channel (17) is connected to the molding blowing hole (11) on the mold body (1), and the other end of the internal shuttle blowing channel (17) is connected to the blowing channel on the mold core (6).
7. The liner blank extrusion die according to claim 5, characterized in that: An inner core blowing channel (21) is provided inside the core body (18) of the mold core (6); one end of the inner core blowing channel (21) is connected to the blowing channel on the diverter shuttle (3), and the other end of the inner core blowing channel (21) is connected to the liner blank extrusion port (10).
8. The liner blank extrusion die according to claim 1, characterized in that: The extrusion die is arranged at the outlet of an extruder for molten raw materials and extruding them at a uniform speed. A drying cylinder is arranged at the inlet of the extruder. A segmented water trough is also arranged at the rear of the extruder. The segmented water trough includes a water trough forming area arranged on the side close to the extruder outlet. A water trough cooling area and a water trough high-temperature area are sequentially extended from the rear end of the water trough forming area. Partition plates are respectively arranged between the various areas of the segmented water trough, and through holes corresponding to the shape of the liner product are arranged on the partition plates.