An injection molding process for the end of a composite pipe

Abstract

The present application relates to an injection molding process for the end of a composite pipe, which comprises the following steps: S1: Grinding the oxidized layer off the part of the end of the composite pipe to be injection molded; S2: Placing the composite pipe with the oxidized layer removed on a mobile device, and then the mobile device drives the composite pipe with the oxidized layer removed to move to a heating device for heating; S3: Then the mobile device drives the heated composite pipe to move to an injection molding device for injection molding; S4: Finally, cooling the injection-molded composite pipe. The present application has the effect of improving the overall processing efficiency.

Description

Technical Field

[0001] This application relates to the technical field of composite pipe processing, and in particular to an injection molding process for the end of a composite pipe. Background Technique

[0002] Steel skeleton composite pipes are a new type of pipe emerging in China in recent years and are widely used in many fields such as petroleum, chemical industry, construction, shipbuilding, communication, electric power, and underground gas transmission pipelines. They are currently a better product to replace traditional galvanized pipes and are known as green environmental protection pipes. It mainly adopts the electrothermal fusion connection method of (steel skeleton reinforced) plastic electrofusion fittings, but this connection method has many defects. For example, it requires reliable pipe end sealing quality and good sealing performance. Otherwise, the metal reinforcement material at the pipe end contacts the conveying medium, resulting in water seepage in the pipe wall and corrosion of the metal reinforcement material, causing quality accidents of pipeline failure; it requires (steel skeleton reinforced) plastic electrofusion fittings that match the pipe size and performance, with high costs; there are no methods and standards for non-destructive testing of electrothermal fusion connection quality and other defects. By using a special pipe end injection molding equipment and process for the steel skeleton composite pipe with a fixed-length cut and no seal at the end, a steel skeleton composite pipe with a hot melt butt plastic end is produced. It increases the wall thickness at the pipe end to reach or exceed the wall thickness of a PE pipe with a nominal pressure grade of 2.0 MPa specified in GB / T 13663.2-2018, thereby meeting the requirements of the hot melt butt connection method for a steel skeleton composite pipe with a plastic end and a nominal pressure not exceeding 2.0 MPa. The pipe end sealing quality is reliable and the sealing performance is good; the technology is mature and the quality is reliable, meeting the requirements of engineering operation.

[0003] Currently, Chinese Patent with the authorized publication number CN101249708A discloses a production process for a steel skeleton plastic composite pipe with a plastic end, including the following steps: a) feeding the end of the steel skeleton plastic composite pipe into an oven and heating the plastic layer at its end to an appropriate temperature at which it can be fused with the plastic material of the plastic end; b) quickly inserting the heated end of the steel skeleton plastic composite pipe into the injection mold for injection molding. The injection mold includes an injection outer mold sleeved on the steel skeleton plastic composite pipe and an inner centering shaft coaxially and movably arranged in the injection outer mold. The injection outer mold is a split mold, and its inner wall is provided with an annular inner concave mold cavity. The end of the steel skeleton plastic composite pipe is placed in the annular inner concave mold cavity, and a certain space is reserved between its end face and the end face of the annular inner concave mold cavity. The end of the inner centering shaft penetrates into this space and abuts against the pipe orifice of the steel skeleton plastic composite pipe; c) maintaining the injection pressure state for cooling and shaping.

[0004] In the process of implementing the present application, the inventors found that there are at least the following problems in this technology: There is generally an oxide layer on the surface of the composite pipe. Due to the existence of the oxide layer, when the end of the composite pipe is injection-molded, the heating time of the injection part of the composite pipe will become longer, and the plastic injected and the plastic on the composite pipe have poor fusion and low bonding strength, resulting in a longer overall processing time, lower processing efficiency and poor pressure-bearing capacity. Summary of the Invention

[0005] In order to improve the overall processing efficiency, the present application provides an injection molding process for the end of a composite pipe.

[0006] An injection molding process for the end of a composite pipe provided by the present application adopts the following technical solutions:

[0007] An injection molding process for the end of a composite pipe includes the following steps: S1: Grinding the oxide layer off the injection part at the end of the composite pipe; S2: Placing the composite pipe with the oxide layer removed on a moving device, and then the moving device drives the composite pipe with the oxide layer removed to move to a heating device for heating; S3: Then the moving device drives the heated composite pipe to move to an injection molding device for injection molding; S4: Finally, cooling the injection-molded composite pipe.

[0008] By adopting the above technical solutions, first grind off the oxide layer on the composite pipe, then place the ground composite pipe on a moving device, and the moving device drives the composite pipe to move to a heating device for heating; then the moving device drives the heated composite pipe to move to an injection molding device for injection molding; finally, cooling the injection-molded composite pipe; therefore, the injection molding process for the end of the composite pipe provided can grind off the oxide layer, thereby reducing the heating time, improving the efficiency, and having good fusion between the injected plastic and the plastic on the composite pipe and high bonding strength.

[0009] Optionally, the injection molding device includes an injection molding frame, an inner mandrel, a first half block, a second half block, a first hydraulic cylinder, a second hydraulic cylinder, a support frame, a third hydraulic cylinder and a pressing sleeve block; the inner mandrel is arranged on the injection molding frame; the first half block and the second half block are both slidably arranged on the injection molding frame, and the inner mandrel is located between the first half block and the second half block, the first hydraulic cylinder and the second hydraulic cylinder are both arranged on the injection molding frame, and the piston rod of the first hydraulic cylinder is connected to the first half block, and the piston rod of the second hydraulic cylinder is connected to the second half block; the support frame is arranged on one side of the injection molding frame, the pressing sleeve block is slidably arranged on the support frame, and both the first half block and the second half block abut against the pressing sleeve block; the third hydraulic cylinder is arranged on the injection molding frame and the piston rod is connected to the pressing sleeve block.

[0010] By adopting the above technical solution, after heating is completed, the composite pipe passes through the pressing sleeve and abuts against the injection molding frame, and the inner centering shaft abuts against the inner side wall of the composite pipe; then the first hydraulic cylinder and the second hydraulic cylinder are started. The piston rod of the first hydraulic cylinder drives the first half block to move, and the piston rod of the second hydraulic cylinder drives the second half block to move, so that both the first half block and the second half block abut against the composite pipe; finally, the third hydraulic cylinder is started, and the piston rod of the third hydraulic cylinder drives the pressing sleeve block to move, so that the pressing sleeve block moves towards the injection molding frame, and the pressing sleeve block is sleeved on the first half block and the second half block, and both the first half block and the second half block tightly abut against the pressing sleeve block.

[0011] Optionally, a reinforcement mechanism is provided on the pressing sleeve block. The reinforcement mechanism includes adjusting blocks, reinforcement blocks, a first adjusting component and a second adjusting component. A plurality of the adjusting blocks are provided, and the plurality of adjusting blocks are all slidably arranged on the pressing sleeve block. Adjusting grooves for clamping the adjusting blocks are formed on both the first half block and the second half block; the reinforcement blocks are slidably arranged on the adjusting blocks, and reinforcement grooves for clamping the reinforcement blocks are formed on the side walls of the adjusting grooves; the first adjusting component is arranged on the pressing sleeve block, and the plurality of adjusting blocks are all connected to the first adjusting component; the second adjusting component is arranged on the adjusting block and connected to the reinforcement block.

[0012] By adopting the above technical solution, when the pressing sleeve block abuts against the injection molding frame, the first adjusting component is started first, and the first adjusting component drives the adjusting block to move so that the adjusting block is clamped with the adjusting groove; then the second adjusting component is started, and the second adjusting component drives the reinforcement block to move so that the reinforcement block is clamped with the reinforcement groove; the provided reinforcement mechanism can improve the stability when the first half block and the second half block tightly abut against the composite pipe.

[0013] Optionally, the mobile device includes a placement rack, a moving block, a first air cylinder, a lifting block, a rotating roller, a clamping block, a third adjusting component and a fourth adjusting component. The moving block is slidably arranged on the placement rack. Two first air cylinders are provided, and both of the two first air cylinders are arranged on the moving block. The lifting block is arranged on the piston rod of the first air cylinder. The rotating roller is rotatably arranged on the lifting block; two clamping blocks are provided, and both of the two clamping blocks are slidably arranged on the moving block; the third adjusting component is arranged on the placement rack and connected to the moving block; the fourth adjusting component is arranged on the moving block, and both of the two clamping blocks are connected to the fourth adjusting component.

[0014] By adopting the above technical solution, the composite pipe is placed above the two rotating rollers, and then the first cylinder is started. The piston rod of the first cylinder drives the lifting block to move towards the composite pipe, so that the rotating pipe on the lifting block abuts against the composite pipe. Then, the fourth adjusting component is started, and the fourth adjusting component drives the two clamping blocks to move towards each other, so that the two clamping blocks clamp the composite pipe located on the rotating roller. Finally, the third adjusting component is started, and the third adjusting component drives the moving block to move. The moving block drives the two clamping blocks to move, and the two clamping blocks drive the composite pipe to move.

[0015] Optionally, a turning component is arranged on the placing rack. The turning component includes a second cylinder and a turning block. The second cylinder is arranged on the placing rack. One end of the turning block is hinged to the placing rack, and the piston rod of the second cylinder is connected to the turning block.

[0016] By adopting the above technical solution, after the injection molding of the composite pipe is completed, the second cylinder is started. The piston rod of the second cylinder drives the turning block to rotate, and the turning block drives the processed composite pipe to move, so that the composite pipe is separated from the rotating roller.

[0017] Optionally, a feeding mechanism is arranged on the placing rack. The feeding mechanism includes a third cylinder, a feeding plate, a first rotating shaft, a blocking plate and a fifth adjusting component. The third cylinder is arranged on the placing rack, and the feeding plate is arranged on the piston rod of the third cylinder. The first rotating shaft is rotatably arranged on the placing rack, the blocking plate is arranged on the first rotating shaft, the blocking plate is arranged between the feeding plate and the rotating roller, and a placing area is formed between the feeding plate and the blocking plate. The fifth adjusting component is arranged on the placing rack and is connected to the first rotating shaft.

[0018] By adopting the above technical solution, a plurality of composite pipes with the oxide layer polished are placed in the placing area. When the composite pipe needs to be transferred out of the placing area, the fifth adjusting component is started first, and the fifth adjusting component drives the blocking plate to move. Then, the third cylinder is started, and the piston rod of the third cylinder drives the feeding plate to move, and the feeding plate transfers the composite pipe out of the placing area.

[0019] Optionally, a transfer mechanism is provided on the placement rack. The transfer mechanism includes a transfer block, a fourth cylinder, a fifth cylinder, a fixed block, a first toggle rod, a second toggle rod, a limiting rod, and a sixth adjustment component. The moving block is slidably arranged on the placement rack, and the third cylinder is arranged on the placement rack with its piston rod connected to the fourth cylinder; the fifth cylinder is arranged on the transfer block, and the fixed block is arranged on the piston rod of the fifth cylinder; the first toggle rod is fixedly arranged at one end of the fixed block, the limiting rod is arranged at the other end of the fixed block, and the second toggle rod is slidably arranged between the first toggle rod and the second toggle rod; the sixth adjustment component is arranged on the fixed block and connected to the second toggle rod.

[0020] By adopting the above technical solution, the initial state is that the second toggle rod abuts against the first toggle rod. When it is necessary to transfer the composite pipe that is about to be processed, that is, the composite pipe that abuts against the blocking block, out of the placement area, first start the fourth cylinder. The piston rod of the fourth cylinder drives the transfer block to move, and the transfer block drives the fifth cylinder to move. The fixed block on the fifth cylinder will move, so that the first toggle rod and the second toggle rod on the fixed block are located above the composite pipe that is about to be processed. Then adjust the position of the blocking plate, and then start the fifth cylinder. The piston rod of the fifth cylinder drives the fixed block to move towards the composite pipe, so that the first toggle block and the second toggle rod move to the side of the composite pipe that is about to be processed away from the blocking plate; then start the sixth adjustment component, and the sixth component drives the second toggle rod to move. The second toggle rod drives the composite pipe that is about to be processed to move towards the limiting rod and makes the composite pipe that is about to be processed abut against the limiting rod. Then adjust the position of the blocking plate again to block the composite pipes in the placement area, and then start the fourth cylinder again, so that the second toggle rod and the limiting rod on the fixed block drive the composite pipe that is about to be processed to move above the rotating roller; the provided transfer mechanism can reduce the manual adjustment of the position of the composite pipe on the placement rack, thereby saving time and improving efficiency.

[0021] Optionally, a rotating mechanism is provided on the fixed block. The rotating mechanism includes a sliding block, a second rotating shaft, and a seventh adjustment component. A sliding hole is formed in the fixed block, the sliding block is slidably arranged in the sliding hole, and the sixth adjustment component is connected to the sliding block; the second rotating shaft is rotatably arranged on the sliding block, and the second toggle rod is connected to the second rotating shaft; the seventh adjustment component is arranged on the sliding block and connected to the second rotating shaft.

[0022] By adopting the above technical solution, the sixth adjustment component drives the sliding block to move, and the second rotating shaft on the sliding block drives the second toggle rod to move; when it is necessary to adjust the position of the second adjusting rod, the seventh adjustment component can be started, and the seventh adjustment component drives the second rotating shaft to rotate, and the second rotating shaft will drive the position of the second toggle rod to change.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The injection molding process at the end of the composite pipe can polish off the oxide layer, thereby reducing the heating time, improving the efficiency, and the plastic injected has good fusion with the plastic on the composite pipe and high bonding strength;

[0025] 2. The transfer mechanism can reduce the manual adjustment of the position of the composite pipe on the placement rack, thereby saving time and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the complete set of equipment in the embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of the mobile device in the embodiment of the present application;

[0028] Figure 3 is a schematic structural diagram of the feeding mechanism in the embodiment of the present application;

[0029] Figure 4 is a schematic structural diagram of the transfer mechanism in the embodiment of the present application;

[0030] Figure 5 is a schematic structural diagram of the fourth adjustment component in the embodiment of the present application;

[0031] Figure 6 is a schematic structural diagram of the injection molding equipment in the embodiment of the present application;

[0032] Figure 7 is a schematic structural diagram of the first adjustment component in the embodiment of the present application;

[0033] Figure 8 is a schematic structural diagram of the second adjustment component in the embodiment of the present application.

[0034] Reference numerals: 1, heating device; 2, injection molding device; 21, injection molding frame; 22, inner mandrel; 23, first half block; 24, second half block; 25, support frame; 26, third hydraulic cylinder; 27, pressing sleeve block; 3, reinforcement mechanism; 31, adjusting block; 32, reinforcement block; 33, first adjustment assembly; 331, threaded drive disk; 332, helical gear block; 333, sixth motor; 334, third gear; 335, fourth gear; 34, second adjustment assembly; 341, seventh motor; 342, fifth gear; 343, rack; 4, moving device; 41, placement rack; 42, moving block; 43, first cylinder; 44, lifting block; 45, rotating roller; 46, clamping block; 47, third adjustment assembly; 471, fifth motor; 472, second screw; 48, fourth adjustment assembly; 481, fourth motor; 482, bidirectional screw; 5, flipping assembly; 51, second cylinder; 52, flipping block; 6, feeding mechanism; 61, third cylinder; 62, feeding plate; 63, first rotating shaft; 64, blocking plate; 65, fifth adjustment assembly; 651, first gear; 652, second gear; 653, first motor; 7, transfer mechanism; 71, transfer block; 72, fourth cylinder; 73, fifth cylinder; 74, fixed block; 741, sliding hole; 75, first toggle lever; 76, second toggle lever; 77, limiting rod; 78, sixth adjustment assembly; 781, third motor; 782, first screw; 8, rotating mechanism; 81, sliding block; 82, seventh adjustment assembly. Detailed implementation mode

[0035] The following will Figure 1-8 further describe the present application in detail.

[0036] The embodiment of the present application discloses a composite pipe end injection molding process.

[0037] Refer to Figure 1 , a composite pipe end injection molding process, including the following steps:

[0038] S1: Grind the oxidized layer off the part of the composite pipe end to be injection molded;

[0039] S2: Place the composite pipe with the oxidized layer removed on the moving device 4, and then the moving device 4 drives the composite pipe with the oxidized layer removed to move to the heating device 1 for heating;

[0040] S3: Then the moving device 4 drives the heated composite pipe to move to the injection molding device 2 for injection molding;

[0041] S4: Finally, cool the injection molded composite pipe.

[0042] Refer to Figure 2 and Figure 3The mobile device 4 includes a placement rack 41, and a loading mechanism 6 is provided on one side of the placement rack 41. The loading mechanism 6 includes a third cylinder 61 fixedly connected to the placement rack 41, and a loading plate 62 is connected to the piston rod of the third cylinder 61; a placement groove is provided on the placement rack 41, and a first rotating shaft 63 is rotatably connected to the placement rack 41, and a blocking plate 64 is fixedly connected to the first rotating shaft 63. The blocking plate 64 can be located in the placement groove, and the blocking plate 64 and the loading plate 62 form a placement area for placing the composite pipe.

[0043] A fifth adjustment assembly 65 is provided on the placement rack 41, and the fifth adjustment assembly 65 includes a first motor 653 fixedly connected to the placement rack 41, and a first gear 651 is keyed to the output shaft of the first motor 653; a second gear 652 meshing with the first gear 651 is keyed to the first rotating shaft 63.

[0044] A plurality of composite tubes with polished oxide layers are placed in the placement area. When the composite tubes need to be transferred out of the placement area, the first motor 653 is started first. The output shaft of the first motor 653 drives the first gear 651 to rotate. The first gear 651 drives the second gear 652 to rotate. The second gear 652 drives the first rotating shaft 63 to rotate. The first rotating shaft 63 drives the blocking plate 64 to move, so that the blocking plate 64 enters the placement groove; then the third cylinder 61 is started. The piston rod of the third cylinder 61 drives the loading plate 62 to move, and the loading plate 62 transfers the composite tube out of the placement area.

[0045] refer to Figure 2 and Figure 4 To better transfer the composite tubes out of the storage area, a transfer mechanism 7 is provided on the storage rack 41. The transfer mechanism 7 includes a transfer block 71 slidably connected to the storage rack 41. A fourth cylinder 72 is fixedly connected to the storage rack 41, and the piston rod of the fourth cylinder 72 is connected to the storage rack 41. A fifth cylinder 73 is fixedly connected to the transfer block 42, and the piston rod of the fifth cylinder 73 is connected to a fixed block 74, which has a sliding hole 741. A first toggle rod 75 is fixedly connected to the side of the fixed block 74 near the loading plate 62, and a limiting rod 77 is fixedly connected to the end of the fixed block 74 away from the loading plate 62.

[0046] The fixed block 74 is provided with a rotation mechanism 8, which includes a sliding block 81 slidably connected within the sliding hole 741. The sliding block 81 is rotatably connected to a second rotating shaft, and a second toggle rod 76 is fixedly connected to the second rotating shaft. The second toggle rod 76 is located between the first toggle rod 75 and the limiting rod 77. The sliding block 81 is provided with a seventh adjustment assembly 82, which includes a second motor fixedly connected to the sliding block 81, and the output shaft of the second motor is connected to the second rotating shaft.

[0047] A sixth adjustment assembly 78 is provided on the fixed block 74, and the sixth adjustment assembly 78 includes a first screw 782 rotatably connected to the sliding hole 741, and the first screw 782 passes through the sliding block 81 and is threadedly connected to the sliding block 81; the fixed block 74 is fixedly connected to the third motor 781, and the output shaft of the third motor 781 is connected to one end of the first screw 782.

[0048] When it is necessary to move the composite pipe to be processed, i.e., the composite pipe that is against the blocking block, out of the placement area, the fourth cylinder 72 is first activated. The piston rod of the fourth cylinder 72 drives the transfer block 71 to move, which in turn drives the fifth cylinder 73 to move. The fixed block 74 on the fifth cylinder 73 moves, causing the first toggle rod 75 on the fixed block 74 to be positioned above the composite pipe to be processed. The first motor 653 is then activated, causing the blocking plate 64 to enter the placement slot. The fifth cylinder 73 is then activated, and the piston rod of the fifth cylinder 73 drives the fixed block 74 to move toward the composite pipe, causing the first toggle block to move to the side of the composite pipe to be processed that is away from the blocking plate 64. The second motor is then started, and its output shaft drives the second rotating shaft to rotate, which in turn drives the second toggle lever 76 to rotate. The end of the second toggle lever 76, which is away from the second rotating shaft, moves from abutting the composite pipe to be processed to the side closer to the first toggle lever 75. The third motor 781 is then started, and its output shaft drives the first screw rod 782 to rotate. The first screw rod 782 drives the sliding block 81 to move, which in turn drives the second toggle lever 76 to rotate. The second toggle lever 76 then drives the composite pipe to be processed toward the limiting rod 77, causing it to contact the limiting rod 77. The first motor 653 is then started, causing the blocking plate 64 to move out of the placement slot. The fourth cylinder 72 is then started, causing the second toggle lever 76 and the limiting rod 77 on the fixed block 74 to drive the composite pipe to be processed to the appropriate position on the placement rack 41.

[0049] refer to Figure 2 and Figure 5 A moving block 42 is slidably connected in the placement rack 41, and two first cylinders 43 are fixedly connected to the moving block 42. A lifting block 44 is connected to the piston rod of each first cylinder 43, and a rotating roller 45 is rotatably connected to the lifting block 44; a sliding groove is provided in the moving block 42 between the two first cylinders 43, and two clamping blocks 46 are slidably connected in the sliding groove.

[0050] A fourth adjustment assembly 48 is provided on the moving block 42, and the fourth adjustment assembly 48 includes a bidirectional screw 482 rotatably connected in the slide groove, the bidirectional screw 482 passes through two clamping blocks 46, and the two clamping blocks 46 are respectively threadedly connected to the two ends of the bidirectional screw 482; a fourth motor 481 is fixedly connected to the moving block 42, and the output shaft of the fourth motor 481 is connected to one end of the bidirectional screw 482.

[0051] A third adjustment component 47 is provided on the placement rack 41, and the third adjustment component 47 includes a second screw 472 rotatably connected to the placement rack 41, and the second screw 472 passes through the moving block 42 and is threadedly connected to the moving block 42; a fifth motor 471 is fixedly connected to the placement rack 41, and the output shaft of the fifth motor 471 is connected to one end of the second screw 472.

[0052] When the second toggle rod 76 and the limiting rod 77 on the fixed block 74 drive the composite pipe to be processed to above the two rotating rollers 45, the first cylinder 43 is first activated. The piston rod of the first cylinder 43 drives the lifting block 44 toward the composite pipe, causing the rotating pipe on the lifting block 44 to contact the composite pipe. Then, the fifth cylinder 73 and the third motor 781 are activated, so that the second toggle rod 76 and the limiting rod 77 no longer limit the composite pipe. Next, the fourth motor 481 is activated. The output shaft of the fourth motor 481 drives the bidirectional screw 482 to rotate. The bidirectional screw 482 drives the two clamping blocks 46 to move toward each other, so that the two clamping blocks 46 clamp the composite pipe on the rotating rollers 45. Finally, the fifth motor 471 is activated. The output shaft of the fifth motor 471 drives the second screw 472 to rotate. The second screw 472 drives the moving block 42 to move. The moving block 42 drives the two clamping blocks 46 to move. The two clamping blocks 46 drive the composite pipe to move.

[0053] refer to Figure 1 and Figure 2 A flip assembly 5 is provided on the placement rack 41, and the flip assembly 5 includes a flip block 52 hinged on the placement rack 41; a second cylinder 51 is fixedly connected to the placement rack 41, and a piston rod of the second cylinder 51 is hinged to the flip block 52.

[0054] When the composite tube is injection-molded, the second cylinder 51 is started, and the piston rod of the second cylinder 51 drives the turning block 52 to rotate, and the turning block 52 drives the processed composite tube to move, so that the composite tube is separated from the rotating roller 45.

[0055] refer to Figure 1 and Figure 6 , the heating device 1 is an electric heating ring.

[0056] refer to Figure 1 and Figure 6 The injection molding equipment 2 includes an injection molding frame 21, to which an internal fixed core shaft 22 is fixedly connected; a first half block 23 and a second half block 24 are slidably connected to the injection molding frame 21, and the internal fixed core shaft 22 is located between the first half block 23 and the second half block 24; a first hydraulic cylinder and a second hydraulic cylinder are connected to the injection molding frame 21, and the piston rod of the first hydraulic cylinder is connected to the first half block 23, and the piston rod of the second hydraulic cylinder is connected to the second half block 24.

[0057] One side of the injection molding frame 21 close to the placement frame 41 is integrally provided with a support frame 25, and the electric heating coil is located at one end of the support frame 25 away from the injection molding frame 21; a pressing sleeve block 27 is slidably connected to the support frame 25; a third hydraulic cylinder 26 is connected to the injection molding frame 21, and the piston rod of the third hydraulic cylinder 26 is connected to the pressing sleeve block 27.

[0058] The composite pipe clamped by the two clamping blocks 46 first moves into the electric heating coil, and the electric heating coil heats the composite pipe; after heating is completed, the composite pipe passes through the pressing sleeve and abuts against the injection molding frame 21, and the inner centering shaft 22 abuts against the inner side wall of the composite pipe; then the first hydraulic cylinder and the second hydraulic cylinder are started, the piston rod of the first hydraulic cylinder drives the first half block 23 to move, the piston rod of the second hydraulic cylinder drives the second half block 24 to move, so that both the first half block 23 and the second half block 24 abut against the composite pipe; finally, the third hydraulic cylinder 26 is started, the piston rod of the third hydraulic cylinder 26 drives the pressing sleeve block 27 to move, so that the pressing sleeve block 27 moves in the direction close to the injection molding frame 21, the pressing sleeve block 27 is sleeved on the first half block 23 and the second half block 24, and both the first half block 23 and the second half block 24 tightly abut against the pressing sleeve block 27.

[0059] Reference Figure 6 、 Figure 7 and Figure 8 , a reinforcement mechanism 3 is arranged on the pressing sleeve block 27. The reinforcement mechanism 3 includes a plurality of adjusting blocks 31 slidably connected to the pressing sleeve block 27. Adjusting grooves for clamping the adjusting blocks 31 are formed on both the first half block 23 and the second half block 24, and reinforcement grooves are formed on the side walls of the adjusting grooves. A first adjusting component 33 is arranged on the pressing sleeve block 27. The first adjusting component 33 includes a threaded driving disc 331 rotatably connected to the pressing sleeve block 27. An inclined tooth block 332 is fixedly connected to the adjusting block 31, and the inclined teeth on the inclined tooth block 332 are meshed with the threads on the threaded driving disc 331; a sixth motor 333 is fixedly connected to the pressing sleeve block 27, and a third gear 334 is key-connected to the output shaft of the sixth motor 333; a fourth gear 335 meshing with the third gear 334 is key-connected to the threaded driving disc 331.

[0060] A reinforcement block 32 clamped with the reinforcement groove is slidably connected to the side wall of the adjusting block 31. A second adjusting component 34 is arranged on the adjusting block 31. The second adjusting component 34 includes a seventh motor 341 fixedly connected to the adjusting block 31, and a fifth gear 342 is key-connected to the output shaft of the seventh motor 341; a rack 343 meshing with the fifth gear 342 is fixedly connected to the reinforcement block 32.

[0061] When the pressing sleeve block 27 abuts against the injection molding frame 21, first start the sixth motor 333. The output shaft of the sixth motor 333 drives the third gear 334 to rotate. The third gear 334 drives the fourth gear 335 to rotate. The fourth gear 335 drives the threaded drive disk 331 to rotate. The threaded drive disk 331 drives the helical block 332 to move. The helical block 332 drives the adjusting block 31 to move, so that the adjusting block 31 is clamped with the adjusting groove. Then start the seventh motor 341. The output shaft of the seventh motor 341 drives the fifth gear 342 to rotate. The fifth gear 342 drives the rack 343 to move. The rack 343 drives the reinforcing block 32 to move, so that the reinforcing block 32 is clamped with the reinforcing groove.

[0062] The implementation principle of a composite pipe end injection molding process in an embodiment of the present application is as follows: First, grind off the oxide layer on the part to be injection molded at the end of the composite pipe.

[0063] Then place the composite pipe with the oxide layer removed in the placement cavity area between the loading plate 62 and the blocking plate 64. Then use the second shifting rod 76 and the limiting rod 77 to transfer the composite pipe above the rotating roller 45. Start the first cylinder 43 to make the rotating roller 45 abut against the composite pipe. Then start the fifth cylinder 73 and the third motor 781 to make the second shifting rod 76 and the limiting rod 77 no longer limit the composite pipe. Then start the fourth motor 481 to make the two clamping blocks 46 clamp the composite pipe located on the rotating roller 45. Finally, start the fifth motor 471, and the two clamping blocks 46 on the moving block 42 drive the composite pipe to move.

[0064] The composite pipe with the oxide layer removed moves to the electric heating coil, and the surface of the part to be injection molded is heated. When the surface temperature reaches the process requirements, cut off the power supply of the electric heating coil and stop heating.

[0065] The heated composite pipe passes through the electric heating coil, so that the composite pipe passes through the pressing sleeve and abuts against the injection molding frame 21, and the inner mandrel 22 abuts against the inner side wall of the composite pipe. Then make the first half block 23 and the second half block 24 abut against the side wall of the composite pipe. Then make the pressing sleeve block 27 abut against the injection molding frame 21. At this time, both the first half block 23 and the second half block 24 abut against the pressing sleeve block 27. Then start the sixth motor 333 to make the adjusting block 31 enter the adjusting groove. Finally, start the seventh motor 341 to make the reinforcing block 32 clamped with the reinforcing groove.

[0066] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A composite pipe end injection molding process, characterized in that, It includes the following steps: S1: Grind off the oxide layer on the part to be injection-molded at the end of the composite pipe; S2: Place the composite pipe with the oxide layer removed on the moving device (4), and then the moving device (4) drives the composite pipe with the oxide layer removed to move to the heating device (1) for heating; S3: Then the moving device (4) drives the heated composite pipe to move to the injection molding device (2) for injection molding; S4: Finally, cool the injection-molded composite pipe; The moving device (4) includes a placement rack (41), a moving block (42), a first cylinder (43), a lifting block (44), a rotating roller (45), a clamping block (46), a third adjustment component (47) and a fourth adjustment component (48), The moving block (42) is slidably arranged on the placement rack (41), there are two first cylinders (43), and both of the two first cylinders (43) are arranged on the moving block (42), the lifting block (44) is arranged on the piston rod of the first cylinder (43), and the rotating roller (45) is rotatably arranged on the lifting block (44); There are two clamping blocks (46), and both of the two clamping blocks (46) are slidably arranged on the moving block (42); The third adjustment component (47) is arranged on the placement rack (41) and is connected to the moving block (42); The fourth adjustment component (48) is arranged on the moving block (42), and both of the two clamping blocks (46) are connected to the fourth adjustment component (48); A flipping component (5) is arranged on the placement rack (41), and the flipping component (5) includes a second cylinder (51) and a flipping block (52), and the second cylinder (51) is arranged on the placement rack (41); One end of the flipping block (52) is hinged to the placement rack (41), and the piston rod of the second cylinder (51) is connected to the flipping block (52); A feeding mechanism (6) is arranged on the placement rack (41), and the feeding mechanism (6) includes a third cylinder (61), a feeding plate (62), a first rotating shaft (63), a blocking plate (64) and a fifth adjustment component (65), The third cylinder (61) is arranged on the placement rack (41), and the feeding plate (62) is arranged on the piston rod of the third cylinder (61); The first rotating shaft (63) is rotatably arranged on the placement rack (41), the blocking plate (64) is arranged on the first rotating shaft (63), the blocking plate (64) is arranged between the feeding plate (62) and the rotating roller (45), and a placement area is formed between the feeding plate (62) and the blocking plate (64); The fifth adjustment component (65) is arranged on the placement rack (41) and is connected to the first rotating shaft (63).

2. The end injection molding process of a composite pipe according to claim 1, characterized in that, The injection molding device (2) includes an injection molding rack (21), an inner fixed core shaft (22), a first half block (23), a second half block (24), a first hydraulic cylinder, a second hydraulic cylinder, a support frame (25), a third hydraulic cylinder (26) and a pressing sleeve block (27); The inner fixed mandrel (22) is arranged on the injection molding frame (21); The first half block (23) and the second half block (24) are both slidably arranged on the injection molding frame (21), and the inner fixed mandrel (22) is located between the first half block (23) and the second half block (24), The first hydraulic cylinder and the second hydraulic cylinder are both arranged on the injection molding frame (21), and the piston rod of the first hydraulic cylinder is connected to the first half block (23), and the piston rod of the second hydraulic cylinder is connected to the second half block (24); The support frame (25) is arranged on one side of the injection molding frame (21), the pressing sleeve block (27) is slidably arranged on the support frame (25), and both the first half block (23) and the second half block (24) abut against the pressing sleeve block (27); The third hydraulic cylinder (26) is arranged on the injection molding frame (21) and the piston rod is connected to the pressing sleeve block (27).

3. A composite pipe end injection molding process according to claim 2, characterized in that, A reinforcement mechanism (3) is arranged on the pressing sleeve block (27), and the reinforcement mechanism (3) includes an adjustment block (31), a reinforcement block (32), a first adjustment component (33) and a second adjustment component (34), A plurality of the adjustment blocks (31) are arranged, and the plurality of adjustment blocks (31) are all slidably arranged on the pressing sleeve block (27), and adjustment grooves for clamping the adjustment blocks (31) are formed on both the first half block (23) and the second half block (24); The reinforcement block (32) is slidably arranged on the adjustment block (31), and a reinforcement groove for clamping the reinforcement block (32) is formed on the side wall of the adjustment groove; The first adjustment component (33) is arranged on the pressing sleeve block (27), and the plurality of adjustment blocks (31) are all connected to the first adjustment component (33); The second adjustment component (34) is arranged on the adjustment block (31) and is connected to the reinforcement block (32).

4. A composite tube end injection molding process according to claim 1, characterized in that, A transfer mechanism (7) is arranged on the placement rack (41), and the transfer mechanism (7) includes a transfer block (71), a fourth cylinder (72), a fifth cylinder (73), a fixed block (74), a first toggle rod (75), a second toggle rod (76), a limiting rod (77) and a sixth adjustment component (78), The moving block (42) is slidably arranged on the placement rack (41), The third cylinder (61) is arranged on the placement rack (41) and the piston rod is connected to the fourth cylinder (72); The fifth cylinder (73) is arranged on the transfer block (71), and the fixed block (74) is arranged on the piston rod of the fifth cylinder (73); The first toggle rod (75) is fixedly arranged at one end of the fixed block (74), and the limiting rod (77) is arranged at the other end of the fixed block (74), The second toggle rod (76) is slidably arranged between the first toggle rod (75) and the limiting rod (77); The sixth adjustment component (78) is arranged on the fixed block (74) and is connected to the second toggle rod (76).

5. A composite pipe end injection molding process according to claim 4, characterized in that, The fixed block (74) is provided with a rotating mechanism (8), and the rotating mechanism (8) includes a sliding block (81), a second rotating shaft and a seventh adjusting component (82). The fixed block (74) is provided with a sliding hole (741), the sliding block (81) is slidingly arranged in the sliding hole (741), and the sixth adjustment component (78) is connected to the sliding block (81); The second rotating shaft is rotatably arranged on the sliding block (81), and the second toggle rod (76) is connected to the second rotating shaft; The seventh adjustment component (82) is arranged on the sliding block (81) and is connected to the second rotating shaft.

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