Injection molding sealing machine for composite pipe

Abstract

A rack is provided with an injection molding machine body, the downstream of the injection molding machine body is provided with a material distributing connector, the material distributing connector is provided with a material distributing cavity and a plurality of material distributing pipes, the material distributing cavity is communicated with a discharging port of the injection molding machine body, and a sealing mold is fixed to the rack; the sealing mold comprises an outer sealing mold and an inner sealing mold, the material distributing pipe is communicated with the annular injection molding groove, a cooling structure for cooling the sealed end is arranged on the outer sealing mold, a clamping base is slidably installed on the portion, located on the downstream side of the sealing mold, of the rack, and a clamping device for clamping the composite pipe is arranged on the clamping base; an axial driving device is arranged on the machine base; an end part heating device is arranged between the sealing mold and the clamping device on the rack; according to the injection molding sealing machine, plastic can be injected separately, and sealing is performed after end heating is performed through the end heating device, so that the cohesive force is improved, the injection molding speed is higher, and stress is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of composite pipe sealing, in particular to an injection molding sealing machine for composite pipes. Background Art

[0002] The composite pipes currently on the market mainly include wire mesh reinforced composite pipes, steel skeleton reinforced composite pipes and wire winding reinforced composite pipes. The composite pipes utilize the internal metal reinforcement structure to enhance the mechanical properties of the composite pipes. After these composite pipes are formed and cut, the end faces will expose the metal wires. Therefore, it is necessary to seal the ends of the composite pipes. The current sealing method is mainly to extrude the plastic through an extruder and then seal the ends of the composite pipes through a die. However, the current sealing machines have the following main disadvantages: 1. The adhesion between the sealed ends of the current sealing machines and the original ends of the composite pipes is relatively poor, and stratification is prone to occur; 2. The current sealing machines utilize the material extruded by the extruder to enter the die, and the plastic enters more concentratedly, resulting in a slow injection speed and uneven force during injection. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an injection molding sealing machine for a composite pipe, which can inject plastics separately and seal after heating the ends through an end heating device, thereby improving the bonding force, making the injection molding speed faster and the force more uniform.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an injection molding and sealing machine for a composite pipe, comprising a frame, an injection molding machine body is arranged on the frame, a material distribution joint is arranged downstream of the injection molding machine body, a material distribution joint is arranged on the material distribution cavity and a plurality of material distribution pipes, the material distribution cavity is connected with the discharge port of the injection molding machine body, a sealing mold is fixed on the frame, the sealing mold comprises a sealing outer mold and a sealing inner mold, an annular injection molding groove is formed between the sealing outer mold and the sealing inner mold for facilitating the insertion of the end of the composite pipe, the material distribution pipe is connected with the annular injection molding groove, a cooling structure for cooling the end after sealing is arranged on the sealing outer mold, a clamping base is slidably installed on the downstream side of the sealing mold on the frame, a clamping device for clamping the composite pipe is arranged on the clamping base, an axial driving device for driving the clamping base to approach or move away from the sealing mold is arranged on the machine base; an end heating device for heating the end of the composite pipe is arranged between the sealing mold and the clamping device on the frame.

[0005] As a preferred solution, the end heating device includes a heating mounting plate vertically lifted and installed on the frame, the heating mounting plate is driven by a vertical lifting power device, a heating nozzle is fixedly installed on the heating mounting plate, the heating nozzle is connected to the hot air supply device, a plurality of jet holes are arranged on the heating nozzle, and a guide diffuser disk is also fixed on the heating nozzle.

[0006] As a preferred solution, the guide diffuser includes a diffuser body, the diffuser body is provided with a central mounting hole, the heating nozzle passes through the central mounting hole, the end surface of the diffuser body is provided with a diffusion groove, the heating nozzle is located in the diffusion groove, and the injection holes are arranged around the heating nozzle and face the side wall of the diffusion groove.

[0007] As a preferred solution, a side wall of the diffusion groove and the groove bottom are smoothly transitioned through an arc transition angle.

[0008] As a preferred solution, the diffusion disk body is further provided with a plurality of radial heating holes, which radially penetrate from the outer contour of the diffusion disk body and are connected with the central mounting hole, and the heating nozzle is provided with radial air outlet holes which are in one-to-one correspondence with the radial heating holes.

[0009] As a preferred solution, a connecting plate is fixed on the heating nozzle, a through mounting hole is provided on the heating mounting plate, the end of the heating nozzle passes through the through mounting hole, and the connecting plate is fixedly connected to the heating mounting plate by fixing bolts.

[0010] As a preferred solution, an arc-shaped strip hole is provided on the connecting plate, and the fixing bolt is constrained in the arc-shaped strip hole.

[0011] As a preferred solution, the clamping device includes a first clamping seat and a second clamping seat axially slidably mounted on the frame, a connecting rod is connected between the first clamping seat and the second clamping seat, a first upper clamp and a first lower clamp are vertically slidably mounted on the first clamping seat, a first upper clamping power device and a first lower clamping power device for driving the first upper clamp and the first lower clamp to rise and fall are fixedly mounted on the first clamping seat, a second upper clamp and a second lower clamp are vertically slidably mounted on the second clamping seat, and a second upper clamping power device and a lower clamping power device for driving the second upper clamp and the first lower clamp to rise and fall are fixedly mounted on the second clamping seat.

[0012] As a preferred solution, the axial drive device includes two axial drive cylinders fixed on the frame, the axial drive cylinders are respectively located on both sides of the sealing mold, and the piston rods of the axial drive cylinders are fixedly connected to the first clamping seat.

[0013] As a preferred solution, the sealing mold includes a mouth mold mounting plate, the sealing outer mold and the sealing inner mold are respectively fixed on the mouth mold mounting plate by bolts, the sealing outer mold and the sealing inner mold are concentrically arranged, the sealing outer mold and the sealing inner mold form the annular injection molding groove, the mouth mold mounting plate is provided with a glue injection hole connecting the feed pipe and the annular injection molding groove, the cooling structure includes an annular cooling chamber on the sealing outer mold, and the sealing outer mold is provided with a cooling medium inlet and a cooling medium outlet connected to the annular cooling chamber.

[0014] After adopting the above technical scheme, the effect of the present invention is as follows: since the injection molding and sealing machine of the composite tube includes a frame, the frame is provided with an injection molding machine body, a material distribution joint is provided downstream of the injection molding machine body, the material distribution joint is provided with a material distribution cavity and a plurality of material distribution pipes, the material distribution cavity is connected with the discharge port of the injection molding machine body, a sealing mold is fixed on the frame, the sealing mold includes a sealing outer mold and a sealing inner mold, an annular injection molding groove is formed between the sealing outer mold and the sealing inner mold for facilitating the insertion of the end of the composite tube, the material distribution pipe is connected with the annular injection molding groove, the sealing outer mold is provided with a cooling structure for cooling the end after sealing, a clamping base is slidably installed on the downstream side of the sealing mold on the frame, a clamping device for clamping the composite tube is provided on the clamping base, and a driving clamping device is provided on the machine base. The base is close to or away from the axial driving device of the sealing mold; an end heating device for heating the end of the composite pipe is arranged on the frame between the sealing mold and the clamping device; first, the composite pipe is clamped by the clamping device, and the axial driving device drives the clamping base to approach the sealing mold, and the end of the composite pipe is first heated by the end heating device to facilitate the subsequent firm sealing, and then the composite pipe is further moved axially to insert the pipe end into the annular injection molding groove, and the material is extruded into the distribution joint through the injection molding machine body, and then enters the annular injection molding groove through the distribution pipe to complete the sealing with the pipe end of the composite pipe, and then the sealed end is cooled by the cooling structure; the injection molding and sealing machine can inject the plastic separately, and heat the end by the end heating device before sealing, thereby improving the bonding force, and the injection molding speed is faster and the force is more uniform.

[0015] Furthermore, since the end heating device includes a heating mounting plate vertically lifted and installed on the frame, the heating mounting plate is driven by a vertical lifting power device, a heating nozzle is fixedly installed on the heating mounting plate, the heating nozzle is connected to a hot air supply device, a plurality of jet holes are arranged on the heating nozzle, and a guide diffusion disk is also fixed on the heating nozzle; by driving the mounting plate to lift and lower by the vertical lifting power device, the heating nozzle can be driven to adjust its height, so that the jet holes can correspond to the pipe openings of the composite pipes at different heights, and the guide diffusion disk can also effectively diffuse the blown hot air to ensure uniform heating of the pipe openings of the composite pipes.

[0016] Furthermore, since the guide diffuser includes a diffuser body, the diffuser body is provided with a central mounting hole, the heating nozzle passes through the central mounting hole, the end surface of the diffuser body is provided with a diffusion groove, the heating nozzle is located in the diffusion groove, and the jet holes are arranged around the heating nozzle and toward the side wall of the diffusion groove; the hot air blown out by the heating nozzle can be effectively diffused through the diffusion groove, thereby increasing the heating area of ​​the pipe end of the composite pipe blown by the hot air.

[0017] In addition, since the side wall of the diffusion groove and the groove bottom are smoothly transitioned through the arc transition angle, the hot air is easily guided and the use effect is improved.

[0018] Furthermore, since the diffusion disk body is also provided with a plurality of radial heating holes, the radial heating holes radially penetrate from the outer contour of the diffusion disk body and are connected with the central mounting hole, the heating nozzle is provided with radial air outlet holes which are connected with the radial heating holes in a one-to-one correspondence; the blowing direction on the heating nozzle is increased, thereby improving the coverage range of the hot air.

[0019] Since a connecting plate is fixed on the heating nozzle, a through mounting hole is provided on the heating mounting plate, and the end of the heating nozzle passes through the through mounting hole, the connecting plate and the heating mounting plate are fixedly connected by fixing bolts; the fixing of the connecting plate and the heating mounting plate ensures that the heating nozzle is firmly installed and can be raised and lowered synchronously with the heating mounting plate.

[0020] Furthermore, since the connecting plate is provided with an arc-shaped strip hole, the fixing bolt is constrained in the arc-shaped strip hole; the arc-shaped strip hole can be conveniently installed, and the angle of the heating nozzle can be adjusted along the arc to ensure that the pipeline connecting the hot air supply device and the heating nozzle is stable and accurate when raised and lowered.

[0021] The cam is an axially movable frame, and the cam is actuated by a plurality of movable frames, and the movable frame is an axially movable frame. The movable frame is an axially movable frame, and the movable frame is actuated by a plurality of movable frames.

[0022] Furthermore, since the axial drive device includes two axial drive cylinders fixed on the frame, the axial drive cylinders are respectively located on both sides of the sealing mold, and the piston rods of the axial drive cylinders are fixedly connected to the first clamping seat, the axial movement of the first clamping seat can be controlled by the extension and retraction of the piston rods of the axial drive cylinders, thereby driving the second clamping seat to move synchronously, and the driving of the two axial drive cylinders is stable and reliable.

[0023] Furthermore, since the sealing mold includes a die mounting plate, the sealing outer mold and the sealing inner mold are respectively fixedly mounted on the die mounting plate by bolts, the sealing outer mold and the sealing inner mold are concentrically arranged, the sealing outer mold and the sealing inner mold form the annular injection molding groove, the die mounting plate is provided with a glue injection hole connecting the feed pipe and the annular injection molding groove, the cooling structure includes an annular cooling chamber on the sealing outer mold, and the sealing outer mold is provided with a cooling medium inlet and a cooling medium outlet connected to the annular cooling chamber; the sealing outer mold and the sealing inner mold can be conveniently mounted on the die mounting plate, which is convenient for subsequent replacement and cleaning, and is convenient for production and manufacturing, and improves efficiency, and the annular cooling chamber can effectively cool the sealing outer mold, thereby improving the cooling efficiency at the sealing point and improving the sealing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 is a stereogram of an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of an embodiment of the present invention;

[0027] Figure 3 is a partial cross-sectional view of an embodiment of the present invention;

[0028] Figure 4 It is a structural schematic diagram of a sealing mold according to an embodiment of the present invention;

[0029] Figure 5 is a cross-sectional view of a sealing mold according to an embodiment of the present invention;

[0030] Figure 6 This is a partial enlarged view of the heating installation plate of the embodiment of the present invention;

[0031] Figure 7 is a schematic structural diagram of one side of a heating installation plate according to an embodiment of the present invention;

[0032] Figure 8 is a cross-sectional view of a heating installation plate according to an embodiment of the present invention;

[0033] Fig. 9 is a schematic structural diagram of the other side of the heating installation plate according to an embodiment of the present invention;

[0034] In the attached drawings: 1, frame; 2, heating mounting plate; 3, heating nozzle; 4, air jet hole; 5, vertical guide rod; 6, lifting cylinder; 7, diffusion plate; 8, center mounting hole; 9, diffusion groove; 10, radial heating air hole; 11, radial air outlet hole; 12, connecting plate; 13, through mounting hole; 14, arc strip hole; 15, bolt connection hole; 16, blower; 17, heating device; 18, air outlet;

[0035] 101. Injection molding machine body; 102. Feeding joint; 103. Feeding cavity; 104. Feeding pipe; 105. Discharging port; 106. Sealing outer mold; 107. Sealing inner mold; 108. Annular injection molding groove; 109. Clamping base; 110. First clamping seat; 111. Second clamping seat; 112. Connecting rod; 113. First upper clamp; 114. First lower clamp; 115. Second upper clamp; 116. Second lower clamp; 117. First upper clamping cylinder; 118. First lower clamping cylinder; 119. Second upper clamping cylinder; 120. Second lower clamping cylinder; 121. Axial drive cylinder; 122. Mouth mold mounting plate; 123. Glue injection hole; 124. Annular cooling chamber; 125. Cooling medium inlet; 126. Cooling medium outlet; 127. Injection molding bracket. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below through specific examples.

[0037] like Figures 1 to 9 As shown, an injection molding sealing machine for a composite pipe comprises a frame 1, an injection molding machine body 101 is arranged on the frame 1, a material distribution joint 102 is arranged downstream of the injection molding machine body 101, a material distribution cavity 103 and a plurality of material distribution pipes 104 are arranged on the material distribution joint 102, the material distribution cavity 103 is communicated with a discharge port 105 of the injection molding machine body 101, a sealing mold is fixed on the frame 1, the sealing mold comprises a sealing outer mold 106 and a sealing inner mold 107, and an annular injection mold is formed between the sealing outer mold 106 and the sealing inner mold 107 for convenient insertion of the end of the composite pipe The injection molding groove 108 is connected to the material distribution pipe 104, and the sealing outer mold 106 is provided with a cooling structure for cooling the end after sealing. A clamping base 109 is slidably installed on the downstream side of the sealing mold on the frame 1, and a clamping device for clamping the composite pipe is provided on the clamping base 109. An axial driving device for driving the clamping base 109 to approach or move away from the sealing mold is provided on the machine base; an end heating device 17 for heating the end of the composite pipe is provided on the frame 1 between the sealing mold and the clamping device.

[0038] The injection molding machine body 101 is fixedly mounted on the frame 1 via an injection molding bracket 127 . The injection molding machine body 101 is an existing structure on the market, and thus will not be described in detail herein.

[0039] like Figure 1 , Figure 3 and Figure 6 As shown, the end heating device 17 includes a heating mounting plate 2 vertically lifted and installed on the frame 1, the heating mounting plate 2 is driven by a vertical lifting power device, a heating nozzle 3 is fixedly installed on the heating mounting plate 2, the heating nozzle 3 is connected to the hot air supply device, a plurality of air jet holes 4 are arranged on the heating nozzle 3, and a guide diffusion disk is also fixed on the heating nozzle 3; since the pipe end of the composite pipe cannot be directly sealed, it is necessary to heat the pipe end to ensure firm bonding, so the vertical lifting power device drives the mounting plate to lift and lower, which can drive the heating nozzle 3 to adjust the height, so that the air jet holes 4 can correspond to the pipe openings of the composite pipes at different heights, and the guide diffusion disk can also effectively diffuse the blown hot air to ensure uniform heating of the pipe openings of the composite pipes.

[0040] The frame 1 is provided with two vertically arranged vertical guide rods 5, and the two ends of the heating mounting plate 2 are vertically slidably installed on the vertical guide rods 5. The vertical lifting power device includes two lifting cylinders 6, and the lifting cylinders 6 are fixed on the frame 11 and located on both sides of the heating mounting plate 2. The piston rods of the lifting cylinders 6 are fixedly connected to the two ends of the heating mounting plate 2; the vertical guide rods 5 ensure the stable lifting of the heating mounting plate 2 during lifting, and the lifting cylinders 6 are located on both sides during the lifting process to ensure the stable and reliable lifting of the heating mounting plate 2, thereby improving the stability of the jet hole 4, and the piston rods of the lifting cylinders 6 are provided with bolt connection holes 15 connected to the two ends of the heating mounting plate 2.

[0041] like Figure 8 and Fig. 9 As shown, the guide diffuser includes a diffuser body 7, the diffuser body 7 is provided with a central mounting hole 8, the heating nozzle 3 passes through the central mounting hole 8, the end face of the diffuser body 7 is provided with a diffusion groove 9, the heating nozzle 3 is located in the diffusion groove 9, and the jet holes 4 are arranged around the heating nozzle 3 and face the side wall of the diffusion groove 9; the hot air blown out by the heating nozzle 3 can be effectively diffused through the diffusion groove 9, thereby increasing the heating area of ​​the pipe end of the composite pipe blown by the hot air.

[0042] Furthermore, the side wall and the bottom of the diffusion groove 9 are smoothly transitioned through a circular arc transition angle, which facilitates the guidance of hot air and improves the use effect.

[0043] In this embodiment, a plurality of radial heating holes 10 are further provided on the diffusion disk body 7. The radial heating holes 10 radially penetrate from the outer contour of the diffusion disk body 7 and are connected with the central mounting hole 8. The heating nozzle 3 is provided with radial air outlet holes 11 which are connected with the radial heating holes 10 in a one-to-one correspondence. The blowing direction on the heating nozzle 3 is increased, thereby improving the coverage range of the hot air.

[0044] like Figure 8 As shown, a connecting plate 12 is fixed on the heating nozzle 3, a through mounting hole 13 is provided on the heating mounting plate 2, the end of the heating nozzle 3 passes through the through mounting hole 13, and the connecting plate 12 is fixedly connected to the heating mounting plate 2 by fixing bolts.

[0045] like Figure 7 As shown, the connecting plate 12 is provided with an arc-shaped strip hole 14, and the fixing bolt is constrained in the arc-shaped strip hole 14; the arc-shaped strip hole 14 can be easily installed, and the angle of the heating nozzle 3 can be adjusted along the arc to ensure that the pipeline connecting the hot air supply device and the heating nozzle 3 is stable and accurate when it is raised and lowered.

[0046] like Figure 1 and Figure 3As shown, the clamping device includes a first clamping seat 110 and a second clamping seat 111 axially slidably mounted on the frame 1, a connecting rod 112 is connected between the first clamping seat 110 and the second clamping seat 111, a first upper clamp 113 and a first lower clamp 114 are vertically slidably mounted on the first clamping seat 110, a first upper clamping power device and a first lower clamping power device that drive the first upper clamp 113 and the first lower clamp 114 to rise and fall are fixedly mounted on the first clamping seat 110, a second upper clamp 115 and a second lower clamp 116 are vertically slidably mounted on the second clamping seat 111, and a second upper clamping power device and a second lower clamping power device that drive the second upper clamp 115 and the second lower clamp 116 to rise and fall are fixedly mounted on the second clamping seat 111; the first clamping seat 112 can ensure that the first clamp 113 and the first lower clamp 114 are vertically slidably mounted. The holding seat 110 and the second clamping seat 111 move synchronously, and the composite pipe is clamped stably and accurately. The first upper clamping power device and the first lower clamping power device respectively drive the first upper clamp 113 and the first lower clamp 114 to rise and fall, ensuring stable and firm clamping. The second upper clamp 115 and the second lower clamp 116 are also the same, which facilitates stable clamping. The first upper clamping power device is the first upper clamping cylinder 117, the first lower clamping power device is the first lower clamping cylinder 118, the second upper clamping power device is the second upper clamping cylinder 119, and the second lower clamping power device is the second lower clamping cylinder 120. The first upper clamping cylinder 117 and the first lower clamping cylinder 118 are respectively fixedly installed on the upper and lower parts of the first clamping seat 110, and the second upper clamping cylinder 119 and the second lower clamping cylinder 120 are respectively fixedly installed on the upper and lower parts of the second clamping seat 111.

[0047] like Figure 2 As shown, the axial driving device includes two axial driving cylinders 121 fixed on the frame 1, and the axial driving cylinders 121 are respectively located on both sides of the sealing mold, and the piston rods of the axial driving cylinders 121 are fixedly connected to the first clamping seat 110; in this way, the axial movement of the first clamping seat 110 can be controlled by the extension and retraction of the piston rod of the axial driving cylinder 121, thereby driving the second clamping seat 111 to move synchronously, and the driving of the two axial driving cylinders 121 is stable and reliable.

[0048] like Figure 4 and Figure 5As shown, the sealing mold includes a die mounting plate 122, the sealing outer mold 106 and the sealing inner mold 107 are respectively fixedly mounted on the die mounting plate 122 by bolts, the sealing outer mold 106 and the sealing inner mold 107 are concentrically arranged, the sealing outer mold 106 and the sealing inner mold 107 form the annular injection groove 108, and the die mounting plate 122 is provided with a glue injection hole 123 that connects the feed pipe 104 and the annular injection groove 108. The cooling structure includes a sealing An annular cooling chamber 124 is also provided on the outer sealing mold 106, and a cooling medium inlet 125 and a cooling medium outlet 126 which are connected to the annular cooling chamber 124 are provided on the sealing outer mold 106; the sealing outer mold 106 and the sealing inner mold 107 can be conveniently installed on the mold mounting plate 122, which is convenient for subsequent replacement and cleaning, and is convenient for production and manufacturing, and improves efficiency. The annular cooling chamber 124 can effectively cool the sealing outer mold 106, thereby improving the cooling efficiency at the sealing point and improving the sealing efficiency.

[0049] In this embodiment, the hot air supply device includes a blower 16 fixed on the frame 1, and the air outlet 18 of the blower 16 is connected to the heating device 17, and the air outlet 18 of the heating device 17 is connected to the heating nozzle 3 through a hose; the angle of the hose is adjusted within the range of the arc-shaped strip hole 14 to ensure that the hose delivers hot air accurately during lifting and lowering, thereby ensuring the heating effect, simple structure, and easy use; the heating device 17 is an existing structure on the market, so it is not described in detail in this article.

[0050] The working principle of this embodiment is as follows: first, the composite tube is clamped by the first upper clamp 113 and the first lower clamp 114, the second upper clamp 115 and the second lower clamp 116, and the axial drive cylinder 121 drives the first clamping seat 110 and the second clamping seat 111 to approach the sealing mold. At this time, the lifting cylinder 6 drives the heating mounting plate 2 to rise, and the tube end of the composite tube approaches the diffusion disk 7. Then the heating device 17 is started, and the blower 16 starts to blow air, which enters the heating nozzle 3 through the outlet 18, and passes through the radial heating air hole 10 and the radial air outlet hole 11. Hot air is blown and then guided and diffused by the diffusion disk 7 to complete the preheating of the composite pipe end. The heating mounting plate 2 descends, and the composite pipe continues to move axially so that the pipe end is inserted into the annular injection molding groove 108. The material is extruded through the injection molding machine body 101 and enters the distribution joint 102. Then, it enters the annular injection molding groove 108 through the distribution pipe 104 and completes the sealing with the composite pipe end. Then, the cooling liquid enters the annular cooling chamber 124 through the cooling medium inlet 125 and the cooling medium outlet 126 and circulates to cool the sealed end.

[0051] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An injection molding sealing machine for a composite pipe, comprising a frame, on which an injection molding machine body is arranged, characterized in that: A material distribution joint is provided downstream of the injection molding machine body, and a material distribution joint is provided with a material distribution cavity and a plurality of material distribution pipes, and the material distribution cavity is communicated with the discharge port of the injection molding machine body; a sealing mold is fixed on the frame, and the sealing mold includes a sealing outer mold and a sealing inner mold, and an annular injection molding groove is formed between the sealing outer mold and the sealing inner mold for facilitating the insertion of the end of the composite tube, and the material distribution pipe is communicated with the annular injection molding groove, and a cooling structure for cooling the end after sealing is provided on the sealing outer mold; a clamping base is slidably installed on the frame at the downstream side of the sealing mold, and a clamping device for clamping the composite tube is provided on the clamping base, and an axial driving device for driving the clamping base to approach or move away from the sealing mold is provided on the machine base; an end heating device for heating the end of the composite tube is provided on the frame between the sealing mold and the clamping device.

2. The injection molding sealing machine for a composite pipe according to claim 1, characterized in that: The end heating device includes a heating mounting plate vertically lifted and installed on the frame, the heating mounting plate is driven by a vertical lifting power device, a heating nozzle is fixedly installed on the heating mounting plate, the heating nozzle is connected to the hot air supply device, a plurality of jet holes are arranged on the heating nozzle, and a guide diffusion disk is also fixed on the heating nozzle.

3. The injection molding sealing machine for a composite pipe according to claim 2, characterized in that: The guide diffuser includes a diffuser body, the diffuser body is provided with a central mounting hole, the heating nozzle passes through the central mounting hole, the end surface of the diffuser body is provided with a diffusion groove, the heating nozzle is located in the diffusion groove, and the injection holes are arranged around the heating nozzle and face the side wall of the diffusion groove.

4. The injection molding sealing machine for a composite pipe according to claim 3, characterized in that: The side wall and the bottom of the diffusion groove are smoothly transitioned through a circular arc transition angle.

5. The injection molding sealing machine for composite pipes according to claim 4, characterized in that: The diffusion disk body is also provided with a plurality of radial heating air holes, which radially penetrate from the outer contour of the diffusion disk body and are connected with the central mounting hole, and the heating nozzle is provided with radial air outlet holes which are in one-to-one correspondence with the radial heating air holes.

6. The injection molding sealing machine for composite pipes according to claim 5, characterized in that: A connecting plate is fixed on the heating nozzle, a through mounting hole is arranged on the heating mounting plate, an end of the heating nozzle passes through the through mounting hole, and the connecting plate is fixedly connected to the heating mounting plate by fixing bolts.

7. The injection molding sealing machine for composite pipes according to claim 6, characterized in that: The connecting plate is provided with an arc-shaped strip hole, and the fixing bolt is constrained in the arc-shaped strip hole.

8. The composite pipe injection molding sealing machine according to claim 1, characterized in that: The clamping device includes a first clamping seat and a second clamping seat axially slidably mounted on the frame, a connecting rod is connected between the first clamping seat and the second clamping seat, a first upper clamp and a first lower clamp are vertically slidably mounted on the first clamping seat, a first upper clamping power device and a first lower clamping power device for driving the first upper clamp and the first lower clamp to rise and fall are fixedly mounted on the first clamping seat, a second upper clamp and a second lower clamp are vertically slidably mounted on the second clamping seat, and a second upper clamping power device and a lower clamping power device for driving the second upper clamp and the first lower clamp to rise and fall are fixedly mounted on the second clamping seat.

9. The composite pipe injection molding sealing machine according to claim 8, characterized in that: The axial drive device comprises two axial drive cylinders fixed on a frame, the axial drive cylinders are respectively located on both sides of the sealing mold, and the piston rods of the axial drive cylinders are fixedly connected to the first clamping seat.

10. The composite pipe injection molding sealing machine according to claim 1, characterized in that: The sealing mold includes a die mounting plate, the sealing outer mold and the sealing inner mold are respectively fixedly mounted on the die mounting plate by bolts, the sealing outer mold and the sealing inner mold are concentrically arranged, the sealing outer mold and the sealing inner mold form the annular injection molding groove, the die mounting plate is provided with a glue injection hole connecting the feed pipe and the annular injection molding groove, the cooling structure includes an annular cooling chamber on the sealing outer mold, and the sealing outer mold is provided with a cooling medium inlet and a cooling medium outlet connected to the annular cooling chamber.

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