A molding apparatus for producing polyisocyanurate tube shells

Abstract

This utility model discloses a molding device for producing polyisocyanurate tube shells, including a base, two fixed baffles fixedly installed on the top of the base, a mold fixedly connected between the two fixed baffles, an mounting seat fixedly installed on the top of the base, a discharge cylinder fixedly installed on the top of the mounting seat, two sealing discs slidably installed inside the mold, a fixed frame fixedly installed on the top of the mold, an annular rack rotatably installed at the end of the mold, and a synchronous cutting component set on the mold. In this utility model, traditional single-cavity dedicated molds can only mold one product at a time, resulting in low mold utilization and slow production cycle. However, this device, through the annular molding cavity formed by the mold and the discharge rod, can realize the single-mold molding of a complete cylindrical blank in one go. With the discharge rod driven by the discharge cylinder and the linkage pushing structure of the sealing disc, the molded blank can be quickly transported to the cutting station, reducing mold idle time and improving mold utilization.

Description

Technical Field

[0001] This utility model relates to the technical field of molding apparatus for producing polyisocyanurate tube shells, and in particular to a molding apparatus for producing polyisocyanurate tube shells. Background Technology

[0002] Polyisocyanurate (PIR) pipe shells are widely used in insulation projects for industrial pipelines and building HVAC systems due to their excellent thermal insulation, fire resistance, and structural strength. Among them, the half-ring (split-type) PIR pipe shell can be directly installed on existing pipelines, large-diameter pipelines, and complex pipelines without disassembling the pipeline, which greatly improves work efficiency and has become the mainstream demand form in the market.

[0003] However, the current production of this type of tube shell faces significant bottlenecks and is difficult to adapt to large-scale production: First, when using a single-cavity dedicated mold, only one product can be formed at a time, resulting in low mold utilization and slow production cycle; Second, the complete tube shell is produced by an integral cylindrical mold and then manually or mechanically cut into half-rings. The accuracy of manual cutting is greatly affected by skill, and uneven cuts and dimensional deviations are likely to occur, leading to poor splicing and sealing and reduced insulation effect. To address this, we have proposed a molding device for the production of polyisocyanurate tube shells. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies by proposing a molding device for the production of polyisocyanurate tube shells.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a molding device for producing polyisocyanurate tube shells, comprising a base, two fixed baffles fixedly installed on the top of the base, a mold fixedly connected between the two fixed baffles, an mounting seat fixedly installed on the top of the base, a discharge cylinder fixedly installed on the top of the mounting seat, two sealing discs slidably installed inside the mold, a fixed frame fixedly installed on the top of the mold, sealing cylinders slidably installed between the inner walls on both sides of the fixed frame, a ring rack rotatably installed at the end of the mold, a drive motor fixedly installed on the top of the base, and a synchronous cutting assembly provided on the mold.

[0006] Preferably, a discharge rod is slidably installed inside the mold, and two sealing discs are respectively sleeved on the outer wall of the discharge rod near both ends. One end of the discharge rod is fixedly connected to the piston rod on the discharge cylinder, and the outer walls of both sealing discs are tightly fitted to the inner wall of the mold.

[0007] Preferably, the top of the mold has a feed port below the fixed frame, and a pressure rod extending from the top inner wall is slidably installed at the bottom of the fixed frame, with the sealing cylinder sleeved at the bottom of the pressure rod.

[0008] Preferably, a return spring is sleeved between the outer wall of the lower pressure rod and the top inner wall of the fixing frame, and the sealing cylinder is slidably inserted into the feed inlet.

[0009] Preferably, extension frames are fixedly connected to the outer walls of both sides of the mold near the end positions, and an integrated clamping plate is fixedly connected to the end of each of the two extension frames. An annular adjustment ring is provided between the two clamping plates corresponding to the rotation of the outer wall of the mold.

[0010] Preferably, the annular rack is sleeved on the outer wall of the adjusting ring, and two mutually symmetrical and arc-shaped extrusion protrusions are fixed on the inner wall of the adjusting ring. The output shaft of the drive motor is sleeved with a drive gear, and the drive gear meshes with the annular rack.

[0011] Preferably, the synchronous cutting assembly includes mounting blocks, extension strips, limiting strips, and inner grooves. Mounting blocks are fixedly provided at the top and bottom of the mold near the end positions. A pair of extension strips are fixedly connected to the sides of the two mounting blocks. A limiting strip is fixedly connected between the two extension strips. Inner grooves are fixedly connected to both sides of the limiting strip.

[0012] Preferably, the synchronous cutting assembly further includes a rigid cutting plate, a slot, and a limiting groove. A rigid cutting plate is slidably installed between a pair of extension strips on the two mounting blocks. Both sides of the two rigid cutting plates are provided with interconnecting slots. Limiting grooves are provided on the inner walls of both sides of the slots. The inner slots are slidably connected in the limiting grooves. The two rigid cutting plates are symmetrically arranged. The bottom of one rigid cutting plate, the top of the other rigid cutting plate, and one side of both rigid cutting plates are provided with blades.

[0013] The beneficial effects of this utility model are:

[0014] 1. In use, traditional single-cavity dedicated molds can only form one product at a time, resulting in low mold utilization and slow production cycle. However, this equipment, through the annular forming cavity formed by the mold and the ejector rod, can achieve single-mold forming of a complete cylindrical blank. With the ejector rod driven by the ejector cylinder and the linkage pushing structure of the sealing plate, the formed blank can be quickly transported to the cutting station, reducing mold idle time and improving mold utilization. At the same time, the equipment integrates the forming and cutting processes into one, eliminating the need to transfer the blank to a separate cutting device, shortening the production process interval, significantly accelerating the production cycle, and effectively meeting the needs of large-scale mass production.

[0015] In traditional production, manual or mechanical cutting is easily affected by skill and operational stability, resulting in uneven cuts and dimensional deviations, which in turn reduce the sealing and insulation performance of the pipe shell assembly. This device achieves high-precision cutting through a synchronous cutting assembly: the drive motor drives the adjusting ring to rotate stably through the meshing of the active gear and the ring rack, causing the extrusion convex plate to synchronously drive the upper and lower symmetrical rigid cutting plates to slide; at the same time, the inner groove of the limiting strip slides into the limiting groove of the rigid cutting plate, restricting the movement trajectory of the cutting plate and ensuring that the blade cuts precisely along the pipe shell axis. The synchronous cutting method avoids interference from human factors, resulting in a smooth, uniformly sized cut in the half-circular pipe shell, effectively ensuring the sealing performance during pipe shell assembly, and thus guaranteeing its thermal insulation performance. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the end of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the adjusting ring and the extrusion protrusion of this utility model;

[0020] Figure 4 This is a schematic diagram of the synchronous cutting component of this utility model;

[0021] Figure 5 This is a cross-sectional view of the mold of this utility model;

[0022] Figure 6 This utility model is for Figure 4 A magnified view of a portion of point A in the middle.

[0023] The attached figures are labeled as follows:

[0024] 1. Base; 2. Fixed baffle; 3. Mold; 4. Mounting seat; 5. Discharge cylinder; 6. Discharge rod; 7. Sealing disc; 8. Drive motor; 9. Drive gear; 10. Adjusting ring; 11. Ring rack; 12. Extrusion protrusion; 13. Feed inlet; 14. Fixed frame; 15. Lower pressure rod; 16. Top cover; 17. Return spring; 18. Lower pressure cover; 19. Sealing cylinder; 20. Extension frame; 21. Clamping plate; 22. Mounting block; 23. Extension strip; 24. Rigid cutting plate; 25. Groove; 26. Limiting strip; 27. Limiting groove; 28. Inner groove. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-6 As shown, a molding apparatus for producing polyisocyanurate tube shells is disclosed, comprising a base 1, two fixed baffles 2 fixedly mounted on the top of the base 1, a mold 3 fixedly connected between the two fixed baffles 2, an mounting seat 4 fixedly mounted on the top of the base 1, a discharge cylinder 5 fixedly mounted on the top of the mounting seat 4, two sealing discs 7 slidably mounted inside the mold 3, a fixed frame 14 fixedly mounted on the top of the mold 3, sealing cylinders 19 slidably mounted between the inner walls on both sides of the fixed frame 14, an annular rack 11 rotatably mounted on the end of the mold 3, a drive motor 8 fixedly mounted on the top of the base 1, and a synchronous cutting assembly provided on the mold 3.

[0027] A discharge rod 6 is slidably installed inside the mold 3. Two sealing discs 7 are respectively fitted onto the outer wall of the discharge rod 6 near both ends. One end of the discharge rod 6 is fixedly connected to the piston rod on the discharge cylinder 5. The outer walls of both sealing discs 7 are tightly fitted to the inner wall of the mold 3. The discharge rod 6 is directly connected to the piston rod of the discharge cylinder 5. With the sealing discs 7 fitted onto the discharge rod 6 and tightly fitted to the inner wall of the mold 3, starting the cylinder can drive the blank to slide smoothly out of the mold. No manual assistance is required for discharge, achieving seamless connection between molding and discharge, reducing process intervals, and speeding up the production cycle.

[0028] The top of the mold 3 is provided with a feed port 13 below the fixed frame 14. A pressure rod 15 extending from the inner wall of the top is slidably installed at the bottom of the fixed frame 14. The sealing cylinder 19 is sleeved on the bottom of the pressure rod 15. The equipment adopts an integrated design, and the entire process from raw material injection, molding to cutting is smoothly connected. When the raw material is injected, the sealing structure composed of the top cover 16, the pressure rod 15 and the return spring 17 realizes the rapid opening and sealing of the feed port 13, which is convenient to operate. After molding, the blank is automatically pushed by the discharge cylinder 5. The cutting process is driven by the drive motor 8 to complete the synchronous cutting. There is no need for manual handling, positioning and cutting of the blank, which greatly reduces the dependence on manual skills, reduces the labor intensity of operators, and reduces production losses caused by human operation errors.

[0029] A reset spring 17 is sleeved between the outer wall of the lower pressure rod 15 and the top inner wall of the lower pressure cover 18 and the fixed frame 14, and the sealing cylinder 19 is slidably inserted into the feed port 13.

[0030] Extension frames 20 are fixedly connected to the outer walls of both sides of the mold 3 near the end. An integrated clamping plate 21 is fixedly connected to the end of each extension frame 20. An annular adjustment ring 10 is located between the two clamping plates 21 corresponding to the rotation of the outer wall of the mold 3.

[0031] The annular rack 11 is sleeved on the outer wall of the adjusting ring 10. The inner wall of the adjusting ring 10 is fixed with two mutually symmetrical and arc-shaped extrusion protrusions 12. The output shaft of the drive motor 8 is sleeved with a drive gear 9, which meshes with the annular rack 11.

[0032] The synchronous cutting assembly includes mounting blocks 22, extension strips 23, limiting strips 26, and inner grooves 28. Mounting blocks 22 are fixedly installed on the top and bottom near the end of the mold 3. A pair of extension strips 23 are fixedly connected to the sides of the two mounting blocks 22. A limiting strip 26 is fixedly connected between the two extension strips 23. Inner grooves 28 are fixedly connected to both sides of the limiting strip 26. The inner groove 28 of the limiting strip 26 slides in conjunction with the limiting groove 27 of the cutting plate slot 25 to restrict the movement trajectory of the cutting plate, avoid deviation and shaking during the cutting process, and keep the cut flat.

[0033] The synchronous cutting assembly also includes a rigid cutting plate 24, a slot 25, and a limiting groove 27. Rigid cutting plates 24 are slidably installed between a pair of extension strips 23 on the two mounting blocks 22. The two rigid cutting plates 24 have interconnected slots 25 on both sides. The inner walls of both sides of the slots 25 have limiting grooves 27. The inner groove 28 is slidably connected in the limiting groove 27. The two rigid cutting plates 24 are symmetrically arranged. The bottom of one rigid cutting plate 24, the top of the other rigid cutting plate 24, and one side of both rigid cutting plates 24 are provided with blades. The symmetrical rigid cutting plates 24 slide synchronously under the drive of the extrusion protrusion 12. The blades can make symmetrical cuts along the axis of the tube shell. The size of the cut half-circle is highly consistent, which significantly improves the sealing performance and heat insulation effect of the tube shell splicing.

[0034] Working principle: In use, isocyanate, polyether polyol and other raw materials are first premixed evenly according to the formula. Then, the top cover 16 is pulled upward on the fixed frame 14, causing the lower pressure rod 15 to drive the sealing cylinder 19 out of the feed port 13. The return spring 17 is compressed and deformed and shortened, and the raw material is poured into the space between the discharge rod 6 and the inner wall of the mold 3 through the feed port 13. After the injection is completed, the top cover 16 is released, and the return force of the return spring 17 pushes the lower pressure cover 18 downward. When the bottom of the top cover 16 is re-attached to the top of the fixed frame 14, the sealing cylinder 19 is reinserted into the feed port 13 to seal, thus sealing the mold 3. The mold 3 is used to form a quantitative amount of premixed raw material. The annular cavity between the mold 3 and the discharge rod 6 is the forming space. After the quantitative amount of premixed raw material is formed, the discharge cylinder 5 is started. The discharge cylinder 5 is activated, and its piston rod pushes the discharge rod 6 towards the discharge end of the mold 3. The sealing disc 7 on the discharge rod 6 slides synchronously, applying a thrust to the tube blank, allowing it to slide smoothly out of the mold 3. When the blank approaches the adjusting ring 10, the drive motor 8 is activated, and the output shaft drives the drive gear 9 to rotate. Through meshing with the ring rack 11, the adjusting ring 10 is driven to rotate between the two clamping plates 21. The extrusion protrusion 12 inside the adjusting ring 10 rotates with it, extruding the rigid cutting plate 24. The top rigid cutting plate 24 slides down along the extension strip 23, and the bottom rigid cutting plate 24 slides up. The inner groove 28 of the limiting strip 26 cooperates with the limiting groove 27 of the slot 25 to ensure the straightness of the sliding. As the blank continues to pass through the two rigid cutting plates 24, its side blades cut the blank evenly into two half-circular tube blank products along the axis, completing the production cycle.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A forming device for polyisocyanurate pipe shell production, comprising a base (1), characterized in that: Two fixed baffles (2) are fixedly installed on the top of the base (1), and a mold (3) is fixedly connected between the two fixed baffles (2). An installation seat (4) is fixedly installed on the top of the base (1), and a discharge cylinder (5) is fixedly installed on the top of the installation seat (4). Two sealing discs (7) are slidably installed inside the mold (3). A fixing frame (14) is fixedly installed on the top of the mold (3). A sealing cylinder (19) is slidably installed between the inner walls on both sides of the fixing frame (14). A ring rack (11) is rotatably installed at the end of the mold (3). A drive motor (8) is fixedly installed on the top of the base (1). A synchronous cutting assembly is provided on the mold (3).

2. A polyisocyanurate pipe shell production forming device according to claim 1, characterized in that: The mold (3) is slidably installed with a discharge rod (6), and two sealing discs (7) are respectively fitted on the outer wall of the discharge rod (6) near both ends. One end of the discharge rod (6) is fixedly connected to the piston rod on the discharge cylinder (5), and the outer walls of the two sealing discs (7) are tightly fitted to the inner wall of the mold (3).

3. The molding apparatus for producing polyisocyanurate tube shells according to claim 2, characterized in that: The mold (3) has a feed port (13) at the top corresponding to the bottom of the fixing frame (14). The bottom of the fixing frame (14) is slidably installed with a pressure rod (15) extending out of the top inner wall. The sealing cylinder (19) is sleeved on the bottom of the pressure rod (15).

4. The molding apparatus for producing polyisocyanurate tube shells according to claim 3, characterized in that: A reset spring (17) is sleeved between the outer wall of the lower pressure rod (15) and the top inner wall of the fixing frame (14), and the sealing cylinder (19) is slidably inserted into the feed inlet (13).

5. The molding apparatus for producing polyisocyanurate tube shells according to claim 3, characterized in that: The two outer walls of the mold (3) are fixedly connected to extension frames (20) near the ends. The ends of the two extension frames (20) are fixedly connected to an integrated clamping plate (21). Between the two clamping plates (21), there is an adjusting ring (10) in the shape of a ring that rotates in relation to the outer wall of the mold (3).

6. The molding apparatus for producing polyisocyanurate tube shells according to claim 5, characterized in that: The annular rack (11) is sleeved on the outer wall of the adjusting ring (10). The inner wall of the adjusting ring (10) is fixed with two mutually symmetrical and arc-shaped extrusion protrusions (12). The output shaft of the drive motor (8) is sleeved with a drive gear (9). The drive gear (9) meshes with the annular rack (11).

7. The molding apparatus for producing polyisocyanurate tube shells according to claim 5, characterized in that: The synchronous cutting assembly includes a mounting block (22), an extension strip (23), a limiting strip (26), and an inner groove (28). The top and bottom of the mold (3) are both fixed with mounting blocks (22) near the end. A pair of extension strips (23) are fixedly connected to the sides of the two mounting blocks (22). A limiting strip (26) is fixedly connected between the two extension strips (23). An inner groove (28) is fixedly connected to both sides of the limiting strip (26).

8. The molding apparatus for producing polyisocyanurate tube shells according to claim 7, characterized in that: The synchronous cutting assembly also includes a rigid cutting plate (24), a slot (25), and a limiting groove (27). The rigid cutting plate (24) is slidably installed between a pair of extension strips (23) on the two mounting blocks (22). The two rigid cutting plates (24) have interconnected slots (25) on both sides. The inner walls of both sides of the slots (25) have limiting grooves (27). The inner groove (28) is slidably connected in the limiting groove (27). The two rigid cutting plates (24) are symmetrically arranged. The bottom of one rigid cutting plate (24), the top of the other rigid cutting plate (24), and one side of the two rigid cutting plates (24) are all provided with blades.

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