A temperature-controllable anti-PE-cracking pipe head injection sealing device

Abstract

The utility model discloses a pipe head injection moulding sealing device of temperature control anti PE cleavage, including base, the top of base is provided with no. The surface of base between no. The surface of base of no. The surface of vertical frame is equipped with mould assembly, and the surface of vertical frame is equipped with mould assembly, and the surface of base of no. The edge of base of both sides of no. The surface of slide rail is equipped with extrusion component, is used for extruding injection moulding material in mould assembly, the utility model discloses the nesting insertion structure of no. The guiding positioning of cooperation limiting slide bar can be according to the flexible selection single -stage or multistage mould combination of pipe head pipe diameter. When needing to handle different specifications pipe head, need not to replace integral mould, only through the insertion combination of mould cylinder can complete the adaptation, significantly improve the sealing operation compatibility of device to different pipe diameter pipe head, reduce equipment replacement cost and production switching time -consuming.

Description

Technical Field

[0001] This utility model relates to the field of PE pipe processing technology, specifically a temperature-controlled injection molding sealing device for preventing PE cracking. Background Technology

[0002] In modern industry and daily life, polyethylene (PE) hoses are widely used in fluid transportation, packaging, and other fields due to their excellent flexibility, corrosion resistance, and chemical stability. During the use of PE hoses, the sealing performance of the hose head directly affects their safety and service life; therefore, injection molding sealing of the PE hose head is crucial.

[0003] Existing injection molding sealing devices for PE hose ends have significant shortcomings in practical applications. On the one hand, traditional mold structures are fixed and difficult to adapt to the sealing requirements of hose ends with different diameters, resulting in poor device compatibility. On the other hand, the pressure control of the extrusion mechanism is singular, failing to achieve precise segmented pressure application, which can easily cause localized overheating and cracking of the PE material, affecting the mechanical properties and service life of the seal. Therefore, a new technical solution is proposed to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a temperature-controlled, PE-resistant injection molding sealing device for pipe heads, which solves the problem mentioned in the background art of traditional fixed mold structures that are difficult to adapt to the sealing requirements of pipe heads of different diameters, resulting in poor device compatibility.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature-controlled, PE-resistant injection molding sealing device for pipe heads, comprising a base, a first groove and a second groove formed at the top of the base, a vertical frame fixedly connected to the base surface between the first groove and the second groove, a mold assembly provided on the surface of the vertical frame, a clamping assembly provided on the base surface at the first groove, and slide rails provided at the base edges on both sides of the second groove, the surface of the slide rails being provided with extrusion assemblies for extruding the injection molding material within the mold assembly.

[0006] In this technical solution, single-stage or multi-stage mold combinations can be flexibly selected according to the pipe diameter. When different specifications of pipe ends need to be processed, there is no need to replace the entire mold; adaptation can be achieved simply by adjusting the insertion and connection of the mold cylinder. This significantly improves the compatibility of the device with sealing operations for pipe ends of different diameters, and reduces equipment replacement costs and production changeover time.

[0007] Preferably, the clamping assembly includes a clamping block and a baffle. A bidirectional lead screw is rotatably connected to the inner side of the first groove. Two threaded sleeves pass through the surface of the bidirectional lead screw and are threadedly connected to the threaded sleeves. The top ends of the two threaded sleeves are fixedly connected to the clamping block. The baffle is fixedly connected to the top edge of the base on one side of the first groove.

[0008] Preferably, a servo motor is fixedly connected to the outer wall of the base corresponding to the horizontal height of the bidirectional lead screw, and the tail end of the drive shaft of the servo motor is connected to one end of the bidirectional lead screw via a coupling.

[0009] Preferably, the mold assembly includes a first mold cylinder, a second mold cylinder, and a third mold cylinder. The first mold cylinder is horizontally fixed between the inner walls of the vertical frame. The second mold cylinder is inserted into the inner side of the first mold cylinder, and the third mold cylinder is inserted into the inner side of the second mold cylinder.

[0010] Preferably, the outer surfaces of the second and third mold cylinders facing the vertical frame are fixedly connected with limiting slide rods, which penetrate the surface of the vertical frame and slide in connection with it. Meanwhile, the surfaces of the first, second, and third mold cylinders are all provided with injection ports, and the interiors are all provided with electric heating tubes.

[0011] Preferably, the extrusion assembly includes a first slide and a second slide. The bottom ends of the first slide are slidably connected to the surfaces of two slide rails, respectively. An extrusion column is fixedly connected to the surface of the first slide facing the vertical frame, and one end of the extrusion column is inserted into the inner side of the third mold cylinder.

[0012] Preferably, the two ends of the second slide are slidably connected to the surfaces of two slide rails, and two fixed blocks are fixedly connected to the top of the second slide. A rotating rod is rotatably connected between the two fixed blocks. A cam is fixedly connected to the surface of the rotating rod. A second servo motor is fixedly connected to the outer wall of one of the fixed blocks. The tail end of the drive shaft of the second servo motor is connected to one end of the rotating rod via a coupling.

[0013] Preferably, a threaded rod is rotatably connected between the left and right inner walls of the second groove. The threaded rod passes through the second slide and is threadedly connected to the second slide. A third servo motor is fixedly connected to the outer wall of the base corresponding to the horizontal height of the threaded rod. The tail end of the drive shaft of the third servo motor is connected to one end of the threaded rod via a coupling.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model utilizes a nested insertion structure of mold cylinders No. 1, No. 2, and No. 3, combined with the guiding positioning of a limiting slide rod, to flexibly select single-stage or multi-stage mold combinations according to the pipe diameter. When processing pipe ends of different specifications, there is no need to replace the entire mold; adaptation can be achieved simply by adjusting the insertion combination of the mold cylinders. This significantly improves the device's compatibility with sealing operations on pipe ends of different diameters, reducing equipment replacement costs and production changeover time.

[0016] 2. This utility model incorporates a cam in the extrusion assembly. As the extrusion column compresses and densifies the injection molding material, the cam rotates slowly, thereby applying additional thrust to the extrusion column. Furthermore, the outer edge of the cam gradually increases, thus gradually increasing the extrusion force during the extrusion process. This segmented pressure control allows the injection molding material to initially fill the mold with low pressure, and then gradually increase to high pressure for compaction as the cam rotates. This avoids the cracking of PE material due to localized stress concentration caused by traditional constant pressure extrusion, and improves the uniformity and density of the seal. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is an overall view of the present invention;

[0019] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the extrusion assembly structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the mold assembly structure of this utility model.

[0022] In the diagram: 1. Base; 101. Groove No. 1; 102. Groove No. 2; 2. Bidirectional lead screw; 201. Threaded sleeve; 202. Servo motor No. 1; 203. Clamping block; 204. Baffle; 3. Vertical frame; 4. Mold cylinder No. 1; 5. Mold cylinder No. 2; 6. Mold cylinder No. 3; 7. Injection port; 8. Limiting slide bar; 9. Slide rail; 10. Slide frame No. 1; 11. Extrusion column; 12. Slide frame No. 2; 121. Fixing block; 122. Rotating rod; 123. Servo motor No. 2; 124. Cam; 13. Threaded rod; 14. Servo motor No. 3; 15. Electric heating element. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description will further elaborate on them in conjunction with specific embodiments.

[0024] A temperature-controlled, PE-resistant injection molding sealing device for pipe ends, see [link / reference]. Figures 1 to 4 The system includes a base 1, with a first groove 101 and a second groove 102 at its top. A vertical frame 3 is fixedly connected to the surface of the base 1 between the first groove 101 and the second groove 102. A mold assembly is provided on the surface of the vertical frame 3. The mold assembly includes a first mold cylinder 4, a second mold cylinder 5, and a third mold cylinder 6. The insertion between the three mold cylinders can be sealed by setting a sealing strip at the outer edge of the second mold cylinder 5 and the third mold cylinder 6 to prevent leakage of injection molding material. The first mold cylinder 4 is horizontally fixed between the inner walls of the vertical frame 3. The second mold cylinder 5 is inserted into the inner side of the first mold cylinder 4, and the third mold cylinder 6 is inserted into the inner side of the second mold cylinder 5. In actual use... If injection molding is required for the largest pipe head, the No. 2 mold cylinder 5 and the No. 3 mold cylinder 6 are connected together with bolts, and then pulled out of the No. 1 mold cylinder 4 until the injection port 7 of the No. 1 mold cylinder 4 is exposed. After the pipe head is inserted, injection material is added through the injection port 7. After the injection is completed, the extrusion column 11, along with the No. 2 mold cylinder 5 and the No. 3 mold cylinder 6, simultaneously forms an extrusion mechanism to extrude the injection material in the No. 1 mold cylinder 4, making the injection more uniform and dense. The same principle applies when injection molding and sealing medium and small pipe heads; only the appropriate mold cylinder needs to be selected. The device can adapt to sealing operations of different pipe diameters, improving the compatibility and practicality of the device. It should be noted that the extrusion column 11 is inserted inside the No. 3 mold cylinder 6, which can block the opening of the No. 3 mold cylinder 6. In turn, the No. 3 mold cylinder 6 and the extrusion column 11 can block the opening of the No. 2 mold cylinder 5, thus forming an injection extrusion surface.

[0025] Specifically, such as Figure 4 As shown, limiting slide rods 8 are fixedly connected to the outer surfaces of mold cylinders 5 and 6 facing the vertical frame 3. The limiting slide rods 8 penetrate the surface of the vertical frame 3 and slide in connection with the vertical frame 3. The limiting slide rods 8 can make mold cylinders 5 and 4 more stable during sliding and reduce the influence of gravity. At the same time, injection ports 7 are opened on the surfaces of mold cylinders 4, 5, and 6, and electric heating tubes 15 are installed inside. The injection ports 7 are all located near the rear opening of each mold cylinder. Therefore, after injection, the insertion of the extrusion assembly can block the injection ports 7, thereby preventing leakage of the sealing material. The electric heating tubes 15 can be heated after being powered on. The wire can be connected from the rear opening. It can regulate the temperature of the internal injection material and prevent premature solidification from affecting the extrusion.

[0026] Furthermore, such as Figure 1 As shown, a clamping assembly is provided on the surface of the base 1 at the first groove 101. The clamping assembly includes a clamping block 203 and a baffle 204. A bidirectional lead screw 2 is rotatably connected to the inner side of the first groove 101. Two threaded sleeves 201 pass through the surface of the bidirectional lead screw 2 and are threadedly connected to the threaded sleeves 201. The top ends of the two threaded sleeves 201 are fixedly connected to the clamping block 203. The baffle 204 is fixedly connected to the top edge of the base 1 on one side of the first groove 101. A servo motor 202 is fixedly connected to the outer wall of the base 1 corresponding to the horizontal height of the bidirectional lead screw 2. The tail end of the drive shaft is connected to one end of the bidirectional lead screw 2 via a coupling. Before injection molding, the tube head is inserted into the opening of the mold cylinder of the corresponding size. At this time, the first servo motor 202 is started to drive the bidirectional lead screw 2 to rotate. During the rotation, the two threaded sleeves 201 will clamp the tube head with their respective clamping blocks 203, and one end of the tube head will abut against the surface of the baffle 204 to prevent it from being pushed out during the extrusion process. It should be noted that the part where the tube head contacts the mold cylinder will be equipped with a high-temperature resistant sealing material such as silicone to ensure that the injection molding material will not flow out from the edge gaps during the extrusion process.

[0027] It is worth noting that, such as Figure 2 and Figure 3 As shown, slide rails 9 are provided on the edges of the base 1 on both sides of the second groove 102. The surface of the slide rail 9 is provided with an extrusion assembly, which includes a first slide 10 and a second slide 12. The bottom ends of the first slide 10 are slidably connected to the surfaces of the two slide rails 9 respectively. An extrusion column 11 is fixedly connected to the surface of the first slide 10 facing the vertical frame 3. One end of the extrusion column 11 is inserted into the inner side of the third mold cylinder 6 for extruding the injection material in the mold assembly. The first slide 10 slides laterally, thereby driving the extrusion column 11 to be inserted into the third mold cylinder 6 and move towards the vertical frame 3 for extrusion. The second slide 12, in conjunction with the cam 124, pushes from the rear to ensure that the extrusion column 11 moves laterally at a slow and uniform speed.

[0028] Furthermore, such as Figure 3As shown, the two ends of the second slide 12 are slidably connected to the surfaces of the two slide rails 9 respectively. Two fixed blocks 121 are fixedly connected to the top of the second slide 12. A rotating rod 122 is rotatably connected between the two fixed blocks 121. A cam 124 is fixedly connected to the surface of the rotating rod 122. A second servo motor 123 is fixedly connected to the outer wall of one of the fixed blocks 121. The tail end of the drive shaft of the second servo motor 123 is connected to one end of the rotating rod 122 through a coupling. When the second servo motor 123 is started, it drives the threaded rod 13 to rotate. At this time, the second slide 12 will move laterally along the threaded rod 13. During the movement, it pushes the first slide 10 and the extrusion column 11 to move laterally. During the movement, the cam 124 is always in contact with the surface of the first slide 10 to ensure stable thrust.

[0029] It is worth noting that, such as Figure 3 As shown, a threaded rod 13 is rotatably connected between the left and right inner walls of the second groove 102. The threaded rod 13 passes through the second slide 12 and is threadedly connected to the second slide 12. A third servo motor 14 is fixedly connected to the outer wall of the base 1 corresponding to the horizontal height of the threaded rod 13. The tail end of the drive shaft of the third servo motor 14 is connected to one end of the threaded rod 13 through a coupling. While the cam 124 pushes the first slide 10, the third servo motor 14 rotates at a very low speed, thereby driving the rotating rod 122 and the cam 124 to rotate slowly. During the rotation, the outer surface of the cam 124 will apply a further thrust to the first slide 10, and the outer edge of the cam 124 gradually increases. Therefore, the thrust will also present multiple stages, realizing pressure adjustment at different positions, making the extrusion of the injection molding material more uniform and dense.

[0030] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

Claims

1. A temperature-controlled, PE-resistant injection molding sealing device for pipe heads, comprising a base (1), characterized in that: The top of the base (1) has a first groove (101) and a second groove (102). A vertical frame (3) is fixedly connected to the surface of the base (1) between the first groove (101) and the second groove (102). A mold assembly is provided on the surface of the vertical frame (3). A clamping assembly is provided on the surface of the base (1) at the first groove (101). Slide rails (9) are provided on the edges of the base (1) on both sides of the second groove (102). An extrusion assembly is provided on the surface of the slide rails (9) for extruding the injection material in the mold assembly.

2. The temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 1, characterized in that: The clamping assembly includes a clamping block (203) and a baffle (204). A bidirectional lead screw (2) is rotatably connected to the inner side of the first groove (101). Two threaded sleeves (201) pass through the surface of the bidirectional lead screw (2) and are threadedly connected to the threaded sleeves (201). The top ends of the two threaded sleeves (201) are fixedly connected to the clamping block (203). The baffle (204) is fixedly connected to the top edge of the base (1) on one side of the first groove (101).

3. The temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 2, characterized in that: A servo motor (202) is fixedly connected to the outer wall of the base (1) corresponding to the horizontal height of the bidirectional lead screw (2). The tail end of the drive shaft of the servo motor (202) is connected to one end of the bidirectional lead screw (2) via a coupling.

4. The temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 1, characterized in that: The mold assembly includes a first mold cylinder (4), a second mold cylinder (5), and a third mold cylinder (6). The first mold cylinder (4) is horizontally fixed between the inner walls of the vertical frame (3). The second mold cylinder (5) is inserted into the inner side of the first mold cylinder (4), and the third mold cylinder (6) is inserted into the inner side of the second mold cylinder (5).

5. A temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 4, characterized in that: The second mold cylinder (5) and the third mold cylinder (6) are fixedly connected to the outer surface of the vertical frame (3) with a limiting slide rod (8). The limiting slide rod (8) passes through the surface of the vertical frame (3) and is slidably connected to the vertical frame (3). Meanwhile, the first mold cylinder (4), the second mold cylinder (5) and the third mold cylinder (6) are all provided with injection ports (7) and electric heating tubes (15) inside.

6. The temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 1, characterized in that: The extrusion assembly includes a first slide (10) and a second slide (12). The bottom ends of the first slide (10) are slidably connected to the surfaces of two slide rails (9). An extrusion column (11) is fixedly connected to the surface of the first slide (10) facing the vertical frame (3). One end of the extrusion column (11) is inserted into the inner side of the third mold cylinder (6).

7. A temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 6, characterized in that: The two ends of the second slide (12) are slidably connected to the surfaces of two slide rails (9). The top of the second slide (12) is fixedly connected to two fixed blocks (121). A rotating rod (122) is rotatably connected between the two fixed blocks (121). A cam (124) is fixedly connected to the surface of the rotating rod (122). A second servo motor (123) is fixedly connected to the outer wall of one of the fixed blocks (121). The tail end of the drive shaft of the second servo motor (123) is connected to one end of the rotating rod (122) through a coupling.

8. A temperature-controlled, PE-resistant injection molding sealing device for pipe heads according to claim 6, characterized in that: A threaded rod (13) is rotatably connected between the left and right inner walls of the second groove (102). The threaded rod (13) passes through the second slide (12) and is threadedly connected to the second slide (12). A third servo motor (14) is fixedly connected to the outer wall of the base (1) corresponding to the horizontal height of the threaded rod (13). The tail end of the drive shaft of the third servo motor (14) is connected to one end of the threaded rod (13) through a coupling.

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