High-performance PPR pipe composite extrusion die

Abstract

The utility model discloses a high-performance PPR pipe composite extrusion die which comprises a die shell, a discharging port is formed in the front end of the interior of the die shell, a die head is arranged at the front end of the discharging port, an annular cover is fixedly arranged on the outer wall of the front end of the die shell in a sleeved mode, an annular installation block is fixedly arranged on the outer wall of the rear side of the die head in a sleeved mode, and the annular cover and the annular installation block are installed in a matched mode. The device further comprises a fixing mechanism. The fixing mechanism comprises an annular groove, a sliding ring, trapezoidal strips, insertion holes, insertion blocks and rollers, the annular groove is formed in the annular mounting block, the sliding ring is rotatably connected to the interior of the annular groove, the trapezoidal strips which are uniformly distributed are arranged on the outer wall of the sliding ring, and the insertion holes which are vertically symmetrical are formed in the outer wall of the annular cover. When the high-performance PPR pipe composite extrusion die is used, the die head is quickly mounted and dismounted through the simple fixing and connecting mechanism, so that the situation that the downtime of equipment is long is avoided, and the labor cost and the labor intensity are reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-performance PPR pipe processing technology, specifically a high-performance PPR pipe composite extrusion die. Background Technology

[0002] The processing of high-performance PPR pipes is a relatively complex process. First, based on the pipe's specifications and performance requirements, a suitable extruder model and screw structure must be selected. Generally, high-performance PPR pipe extrusion should use a screw with a large length-to-diameter ratio to ensure sufficient plasticization and uniform extrusion of the material. The extruder's temperature, speed, and pressure parameters must be adjusted. The extruder temperature setting should be determined based on the characteristics of the PPR resin, typically with a gradual temperature increase from the hopper end to the die head to ensure gradual plasticization of the material during extrusion. The shape and size of the die directly determine the pipe's outer diameter and surface quality. For high-performance PPR pipes, the die design must consider the material's flow characteristics and the pipe's forming requirements. A streamlined die structure is usually adopted to reduce material flow resistance and residence time within the die, avoiding weld lines and surface defects.

[0003] In some existing high-performance PPR pipe composite extrusion dies, the die is installed and fixed by various bolts and nuts when using the high-performance PPR pipe composite extrusion die;

[0004] Existing high-performance PPR pipe composite extrusion dies have the following problems: when using high-performance PPR pipe composite extrusion dies, fixing them with multiple bolts and nuts is time-consuming, resulting in long equipment downtime, increased labor costs and labor intensity. To address this, we propose a high-performance PPR pipe composite extrusion die. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-performance PPR pipe composite extrusion die. When using the high-performance PPR pipe composite extrusion die, the die head can be quickly installed and disassembled through a simple fixed connection mechanism, avoiding long equipment downtime, reducing labor costs and labor intensity, and effectively solving the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-performance PPR pipe composite extrusion mold, including a mold shell, an outlet is provided at the front end inside the mold shell, a die head is provided at the front end of the outlet, an annular cover is fixedly sleeved on the outer wall of the front end of the mold shell, an annular mounting block is fixedly sleeved on the rear outer wall of the die head, the annular cover and the annular mounting block are fitted together, and a fixing mechanism is also included.

[0007] The fixing mechanism includes an annular groove, a slip ring, trapezoidal strips, insertion holes, insertion blocks, and rollers. The annular mounting block has an annular groove inside, and a slip ring is rotatably connected inside the annular groove. The outer wall of the slip ring has evenly distributed trapezoidal strips. The outer wall of the annular cover has symmetrically arranged insertion holes. Symmetrically arranged sliding grooves are formed at the inner edge of the annular mounting block. Support plates are slidably connected between the front and rear inner walls of the sliding grooves. Insertions are fixedly connected to the outer ends of the support plates, and the insertion blocks are respectively installed in conjunction with vertically adjacent insertion holes. Rollers are rotatably connected to the inner ends of the support plates, and the outer surfaces of the rollers are slidably connected to the inclined surfaces of vertically adjacent trapezoidal strips. When using a high-performance PPR pipe composite extrusion die, the die head can be quickly installed and disassembled through a simple fixing mechanism, avoiding long equipment downtime and reducing labor costs and labor intensity.

[0008] Furthermore, the fixing mechanism also includes a telescopic rod and a spring. The inner wall of the sliding groove and the outer end of the vertically adjacent support plate are respectively fixedly connected with a telescopic rod, and the telescopic rod is respectively fitted with a spring to facilitate rebound.

[0009] Furthermore, the fixing mechanism also includes a locking assembly, which includes a support rod and a lever. The front side of the upper trapezoidal strip is fixedly connected to the support rod, and the front end of the support rod is fixedly connected to the lever. The front side of the annular mounting block is provided with an arc-shaped limiting hole corresponding to the support rod for easy locking.

[0010] Furthermore, the locking assembly also includes a stop bar and a mounting block. The right side of the front end of the annular mounting block is provided with a mounting block, and the right end of the mounting block is fixedly connected to the stop bar. The outer surface of the stop bar is fitted with the right side of the lever to facilitate locking.

[0011] Furthermore, the annular mounting block has an insertion groove at its edge, and a locking block is fixedly connected to the edge of the front end of the annular cover. The locking block and the insertion groove are fitted together for easy locking.

[0012] Furthermore, a rubber sealing ring is provided between the front edge of the discharge port and the rear edge of the die head, and a rubber sealing ring is provided between the front edge of the die shell and the front wall of the annular mounting block to provide a seal.

[0013] Furthermore, the rear end of the mold shell is provided with an installation ring for easy installation.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-performance PPR pipe composite extrusion die has the following advantages:

[0015] By turning the lever to rotate the slip ring, the roller rolls along the inclined surface of the trapezoidal strip, pushing the insert block to engage with the insertion hole. Then, the lever locks the lever. To disassemble, turn the lever to unlock, turn the lever in the opposite direction, and the spring causes the insert block to exit the insertion hole, allowing the die head to be removed. When using a high-performance PPR pipe composite extrusion die, the die head can be quickly installed and disassembled through a simple fixed connection mechanism, avoiding long equipment downtime and reducing labor costs and labor intensity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the upper side of this utility model;

[0019] Figure 4 This is a schematic diagram of the front side cross-sectional structure of the present invention;

[0020] Figure 5 This is an enlarged structural diagram of point A in this utility model;

[0021] Figure 6 This is an enlarged structural diagram of section B of the present invention.

[0022] In the diagram: 1. Mold shell, 2. Mounting ring, 3. Mold head, 4. Discharge port, 5. Annular cover, 6. Annular mounting block, 7. Fixing mechanism, 71. Annular groove, 72. Slip ring, 73. Trapezoidal strip, 74. Telescopic rod, 75. Spring, 76. Insertion hole, 77. Insertion block, 78. Roller, 79. Locking assembly, 791. Support rod, 792. Toggle block, 793. Stop bar, 794. Mounting block, 8. Insertion groove, 9. Locking block, 10. Rubber sealing ring one, 11. Rubber sealing ring two, 12. Sliding groove. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-6This embodiment provides a technical solution: a high-performance PPR pipe composite extrusion mold, including a mold shell 1, an outlet 4 at the front end inside the mold shell 1, a die head 3 at the front end of the outlet 4, an annular cover 5 fixedly sleeved on the outer wall of the front end of the mold shell 1, an annular mounting block 6 fixedly sleeved on the rear outer wall of the die head 3, the annular cover 5 and the annular mounting block 6 are fitted together, and a fixing mechanism 7 is also included. An insertion groove 8 is provided at the edge of the annular mounting block 6, a locking block 9 is fixedly connected at the edge of the front end of the annular cover 5, the locking block 9 is fitted together with the insertion groove 8, and a rubber sealing ring 10 is provided between the front edge of the outlet 4 and the rear edge of the die head 3. A rubber sealing ring 11 is provided between the front wall of the annular mounting block 6 and the outer surface of the mold shell 1. A mounting ring 2 is provided at the rear end of the mold shell 1. When using a high-performance PPR pipe composite extrusion mold, the mold shell 1 is first installed at the discharge port of the equipment through the mounting ring 2. Then, the annular mounting block 6 on the die head 3 is aligned with the annular cover 5 at the front end of the mold shell 1, so that the locking block 9 on the annular cover 5 is embedded in the insertion groove 8 of the annular mounting block 6, thus completing the initial positioning of the die head 3. At this time, the front end face of the discharge port 4 is in contact with the rear end face of the die head 3, and the rubber sealing ring 10 is squeezed to achieve a seal. The front end face of the mold shell 1 is in contact with the front wall of the annular mounting block 6, which squeezes the rubber sealing ring 11 to achieve a sealing effect.

[0025] Fixing mechanism 7 includes an annular groove 71, a slip ring 72, trapezoidal bars 73, insertion holes 76, insertion blocks 77, and rollers 78. The annular mounting block 6 has an annular groove 71 inside, and a slip ring 72 is rotatably connected inside the annular groove 71. The outer wall of the slip ring 72 has evenly distributed trapezoidal bars 73. The outer wall of the annular cover 5 has vertically symmetrical insertion holes 76. The inner edge of the annular mounting block 6 has vertically symmetrical sliding grooves 12. Support plates are slidably connected between the front and rear inner walls of the sliding grooves 12. Insertion blocks 77 are fixedly connected to the outer ends of the support plates, and the insertion blocks 77 are respectively installed in conjunction with vertically adjacent insertion holes 76. Rollers 78 are rotatably connected to the inner ends of the support plates, and the outer surfaces of the rollers 78 slide against the inclined surfaces of vertically adjacent trapezoidal bars 73. The connecting and fixing mechanism 7 also includes a telescopic rod 74 and a spring 75. The inner wall of the sliding groove 12 and the outer ends of the vertically adjacent support plates are respectively fixedly connected to the telescopic rod 74. Springs 75 are respectively sleeved on the outside of the telescopic rod 74. The fixing mechanism 7 also includes a locking assembly 79, which includes a support rod 791 and a lever 792. The front side of the upper trapezoidal strip 73 is fixedly connected to the support rod 791, and the front end of the support rod 791 is fixedly connected to the lever 792. The front side of the annular mounting block 6 has an arc-shaped limiting hole corresponding to the support rod 791. The locking assembly 79 also includes a stop bar 793 and a mounting block 794. The right side of the front end of the annular mounting block 6 has a mounting block 794, and the right end of the mounting block 794 is fixedly connected to the stop bar 793. The outer surface of the rod 793 is fitted with the right side of the lever 792. Initially, the slip ring 72 is in a non-fixed position, and the roller 78 is located at the lower position of the trapezoidal strip 73. Under the action of the spring 75, the insert 77 retracts into the sliding groove 12 and is not inserted into the insertion hole 76 of the annular cover 5. At this time, moving the lever 792 drives the support rod 791 and the upper trapezoidal strip 73, causing the slip ring 72 to rotate in the annular groove 71. The roller 78 begins to roll upward along the inclined surface of the trapezoidal strip 73. As the slip ring 72 rotates, the trapezoidal strip 73 pushes the roller 78 to move outward. The roller 78 drives the support plate and the insert 77 to slide outward against the elastic force of the spring 75. When the slip ring 72 rotates to a specific angle, the trapezoidal strip 73 reaches a certain position, and the insert 77 is just inserted into the insertion hole 76 of the annular cover 5. The ring mounting block 6 and the ring cover 5 are now firmly fixed, thus stably installing the die head 3 on the die housing 1. After fixing, the stop lever 793 is rotated to the right side of the lever 792, restricting the lever 792 from rotating to the left, preventing the slip ring 72 from accidentally rotating and causing the insert block 77 to disengage from the insert hole 76, thus playing a locking role and ensuring that the die head 3 will not loosen during production. After the die head 3 is installed and fixed, the die is connected to equipment such as an extruder through the mounting ring 2 at the rear end of the die housing 1. The extrusion equipment is started, and the PPR raw material enters from the rear end of the die housing 1 and is extruded from the die head 3 through the discharge port 4. When it is necessary to replace the die head 3, first rotate the stop lever 793 away from the lever 792 to release the lock, and then turn the lever 792 in the opposite direction to drive the slip ring 72 to rotate in the opposite direction.Roller 78 slides inward under the force of spring 75 and the inclined surface of trapezoidal strip 73, causing insert block 77 to retract from insert hole 76. Once insert block 77 is fully retracted, mold head 3 can be removed from mold housing 1, completing the disassembly operation for mold head replacement or maintenance.

[0026] The working principle of the high-performance PPR pipe composite extrusion die provided by this utility model is as follows: When using the high-performance PPR pipe composite extrusion die, first install the die shell 1 at the discharge port of the equipment through the mounting ring 2. Then, align the annular mounting block 6 on the die head 3 with the annular cover 5 at the front end of the die shell 1, so that the locking block 9 on the annular cover 5 is embedded into the insertion groove 8 of the annular mounting block 6, completing the initial positioning of the die head 3. At this time, the front end face of the discharge port 4 is in contact with the rear end face of the die head 3, and the rubber sealing ring 10 is squeezed to achieve a seal. The front end face of the die shell 1 is in contact with the front wall of the annular mounting block 6. The slip ring 72 is in a non-fixed position, and the roller 78 is located at the lower position of the trapezoidal strip 73. Under the action of the spring 75, the insert block 77 retracts into the sliding groove 12 and is not inserted into the insertion hole 76 of the annular cover 5. At this time, the push block 792 drives the support rod 791 and the upper trapezoidal strip 73, causing the slip ring 72 to rotate in the annular groove 71. The roller 78 begins to roll upward along the inclined surface of the trapezoidal strip 73. As the slip ring 72 rotates, the trapezoidal strip 73 pushes the roller 78 to move outward. The roller 78 drives the support plate and the insert block 77 to overcome the spring 75. 5. The elastic force slides outward. When the slip ring 72 rotates to a specific angle, the trapezoidal strip 73 reaches a certain position, and the insert 77 is precisely inserted into the insertion hole 76 of the annular cover 5, thus firmly fixing the annular mounting block 6 to the annular cover 5. This stabilizes the mold head 3 on the mold housing 1. After fixing, the stop lever 793 is rotated to the right of the lever 792, restricting the lever 792 from rotating to the left. This prevents the slip ring 72 from rotating accidentally and causing the insert 77 to disengage from the insertion hole 76, thus locking the mold head 3 and ensuring it does not loosen during production. After the mold head 3 is installed and fixed, the installation is completed through the rear end of the mold housing 1. Ring 2 connects the mold to equipment such as an extruder. When the extrusion equipment is started, the PPR raw material enters from the rear end of the mold housing 1 and is extruded from the die head 3 through the discharge port 4. When the die head 3 needs to be replaced, first rotate the stop bar 793 away from the lever 792 to release the lock, and then turn the lever 792 in the opposite direction to drive the slip ring 72 to rotate in the opposite direction. The roller 78 slides inward under the elastic force of the spring 75 and the inclined surface of the trapezoidal strip 73. The insert 77 exits from the insertion hole 76. After the insert 77 is completely exited, the die head 3 can be removed from the mold housing 1 to complete the disassembly operation for die head replacement or maintenance.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-performance PPR pipe composite extrusion die, comprising a die shell (1), wherein a discharge port (4) is provided at the front end of the interior of the die shell (1), a die head (3) is provided at the front end of the discharge port (4), an annular cover (5) is fixedly sleeved on the outer wall of the front end of the die shell (1), and an annular mounting block (6) is fixedly sleeved on the rear outer wall of the die head (3), wherein the annular cover (5) and the annular mounting block (6) are fitted together, characterized in that: It also includes fixed mechanisms (7); Fixing mechanism (7): It includes an annular groove (71), a slip ring (72), a trapezoidal strip (73), a socket (76), a plug (77), and a roller (78). The annular mounting block (6) has an annular groove (71) inside. The annular groove (71) is rotatably connected to the slip ring (72) inside. The outer wall of the slip ring (72) is provided with evenly distributed trapezoidal strips (73). The outer wall of the annular cover (5) is provided with symmetrically arranged sockets (76). The inner edge of the annular mounting block (6) is provided with symmetrically arranged sliding grooves (12). The front and rear inner walls of the sliding grooves (12) are slidably connected to the support plates respectively. The outer ends of the support plates are fixedly connected to the plugs (77). The plugs (77) are respectively installed in conjunction with the vertically adjacent sockets (76). The inner ends of the support plates are rotatably connected to the rollers (78). The outer surfaces of the rollers (78) are slidably connected to the inclined surfaces of the vertically adjacent trapezoidal strips (73).

2. The high-performance PPR pipe composite extrusion die according to claim 1, characterized in that: The fixing mechanism (7) also includes a telescopic rod (74) and a spring (75). The inner wall of the sliding groove (12) and the outer end of the vertically adjacent support plate are respectively fixedly connected with the telescopic rod (74), and the outside of the telescopic rod (74) is respectively fitted with a spring (75).

3. The high-performance PPR pipe composite extrusion die according to claim 2, characterized in that: The fixing mechanism (7) further includes a locking assembly (79), which includes a support rod (791) and a lever (792). The front side of the upper trapezoidal strip (73) is fixedly connected to the support rod (791), and the front end of the support rod (791) is fixedly connected to the lever (792). The front side of the annular mounting block (6) is provided with an arc-shaped limiting hole corresponding to the support rod (791).

4. The high-performance PPR pipe composite extrusion die according to claim 3, characterized in that: The locking assembly (79) also includes a stop bar (793) and a mounting block (794). The right side of the front end of the annular mounting block (6) is provided with the mounting block (794). The right end of the mounting block (794) is fixedly connected to the stop bar (793). The outer surface of the stop bar (793) is fitted with the right side of the lever (792).

5. The high-performance PPR pipe composite extrusion die according to claim 1, characterized in that: The annular mounting block (6) has a plug-in groove (8) at its edge, and a locking block (9) is fixedly connected to the edge of the front end of the annular cover (5). The locking block (9) is installed in conjunction with the plug-in groove (8).

6. The high-performance PPR pipe composite extrusion die according to claim 1, characterized in that: A rubber sealing ring 1 (10) is provided between the front edge of the discharge port (4) and the rear edge of the mold head (3), and a rubber sealing ring 2 (11) is provided between the front edge of the mold shell (1) and the front wall of the annular mounting block (6).

7. The high-performance PPR pipe composite extrusion die according to claim 1, characterized in that: The mold shell (1) is provided with a mounting ring (2) at its rear end.

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