Sealing machine for reinforced composite pipe and sealing method for reinforced composite pipe

Abstract

The invention relates to the field of reinforced composite pipe machining, and discloses a sealing machine for a reinforced composite pipe and a sealing method of the reinforced composite pipe, the reinforced composite pipe is provided with a plastic inner layer, a middle reinforcing layer and a plastic outer layer, the sealing machine comprises a grooving device, a sealing device and a sealing device, the grooving device can be used for forming a groove in the middle reinforcing layer close to the end face; the outer mold device comprises an outer mold, the outer diameter of the outer mold is matched with that of the reinforced composite pipe, and the reinforced composite pipe is sleeved with the outer mold at the position of the groove; the heating device is used for heating the end surface with the groove, so that the plastic inner layer and the plastic outer layer at the groove are in a molten state; and the inner mold device comprises an inner mold, the inner mold can be inserted into the reinforced composite pipe at the end where the groove is located and move towards the groove relative to the outer mold, molten plastic generated by melting of the plastic inner layer and the plastic outer layer is extruded, and the middle reinforced layer is sealed in the plastic with the closed end. According to the technical scheme, the sealing effect is good, and polishing is not needed.

Description

Technical Field

[0001] The invention relates to the field of reinforced composite pipe processing, and in particular to a sealing machine for a reinforced composite pipe and a sealing method for a reinforced composite pipe. Background Art

[0002] The structure of the reinforced composite pipe generally includes at least: a plastic inner layer, an intermediate reinforcement layer, and a plastic outer layer. When the end is subjected to anti-corrosion treatment, the intermediate reinforcement layer is generally sealed for anti-corrosion.

[0003] The sealing method of the prior art is: heating and softening the end face of the reinforced composite pipe, and then putting a mold on the end face of the reinforced composite pipe to extrude and seal the reinforcement layer. Since the mold is a single mold, the end face is subjected to force that flows in the opposite direction of the mold during the extrusion process, resulting in insufficient sealing material and poor sealing effect. In addition, the molten plastic overflows to the inner and outer edges of the end face, and an additional process is required to grind the inner and outer edges of the end face, resulting in high production costs. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that the mold in the prior art is a single mold, and the end face is subjected to force during the extrusion process, which will flow in the opposite direction of the mold, resulting in insufficient sealing material and poor sealing effect, and the molten plastic overflows to the inner and outer edges of the end face, and an additional process is required to grind the inner and outer edges of the end face, resulting in high production costs.

[0005] In order to achieve the above object, the present invention provides a sealing machine for a reinforced composite pipe, wherein the reinforced composite pipe has a plastic inner layer, an intermediate reinforcement layer and a plastic outer layer, and the sealing machine comprises:

[0006] A slotting device, the slotting device is configured to be able to open a groove at the middle reinforcement layer near the end surface of the reinforced composite pipe;

[0007] An outer mold device, the outer mold device includes an outer mold, the outer mold matches the outer diameter of the reinforced composite pipe, and is suitable for being sleeved outside the reinforced composite pipe at the position of the groove;

[0008] A heating device capable of heating the end surface with the groove so that the inner layer and the outer layer of plastic at the position of the groove are in a molten state; and

[0009] The inner mold device includes an inner mold, which can be inserted into the reinforced composite tube at one end where the groove is located and move relative to the outer mold toward the groove, and keep in contact with the inner side of the plastic inner layer and the inner periphery of the outer mold respectively during the movement, so as to extrude the molten plastic produced by melting the plastic inner layer and the plastic outer layer into the groove and seal the middle reinforcement layer in the plastic with closed ends.

[0010] In some embodiments, the sealing machine also includes a delivery device, which can deliver the reinforced composite tube through the opening of the outer mold to a grooved heating working position whose end face is located outside the outer mold. When the reinforced composite tube is located at the grooved heating working position, the groove opening device opens a groove on the reinforced composite tube, and the heating device heats the groove to make the groove return to the sealing working position contained in the outer mold. The outer mold and the inner mold are pressed together when the groove is in the sealing working position.

[0011] In some embodiments, the delivery device includes a positioning mechanism and a clamping mechanism. The positioning mechanism can position the reinforced composite pipe to an initial position, and the clamping mechanism can clamp the reinforced composite pipe and deliver the reinforced composite pipe from the initial position to the slotting and heating working position.

[0012] In some embodiments, the positioning mechanism includes:

[0013] A positioning mounting frame, which is fixedly arranged between the inner mold device and the clamping mechanism, with a middle opening for allowing the reinforced composite pipe to pass through and perpendicular to the length direction of the reinforced composite pipe;

[0014] A reinforced composite pipe positioning plate, which is mounted on one side of the positioning mounting frame and can reciprocate on the positioning mounting frame to stop the opening on the positioning mounting frame or release the opening. When the reinforced composite pipe positioning plate stops the opening on the positioning mounting frame and abuts against the end face, the reinforced composite pipe is in an initial position;

[0015] A positioning rail, the positioning rail is installed on the same side of the positioning mounting frame as the reinforced composite pipe positioning plate, and the reinforced composite pipe positioning plate reciprocates on the positioning rail to reciprocate on the positioning mounting frame; and,

[0016] The positioning drive member can drive the reinforced composite pipe positioning plate to move.

[0017] In some embodiments, the clamping mechanism comprises:

[0018] The clamping seat comprises an upper clamping block and a lower clamping seat matching the shape of the reinforced composite pipe. The upper clamping block and the lower clamping seat are arranged in at least two groups along the length direction of the reinforced composite pipe. The upper clamping block can reciprocate in the vertical direction to clamp and fix the reinforced composite pipe.

[0019] A clamping track, the clamping track is parallel to the length direction of the reinforced composite pipe, and the clamping seat can reciprocate on the clamping track to deliver the reinforced composite pipe from the initial position to the slotting and heating working position; and

[0020] The clamping driving member can drive the upper clamping block and the clamping seat to move.

[0021] In some embodiments, the front and rear ends of the inner wall of the outer mold expand outward to form a conical surface.

[0022] In some embodiments, the outer mold device also includes an outer mold frame, the outer mold is installed on the outer mold frame to fix the outer mold, the outer mold frame has a vertical opening that matches the outer wall of the outer mold, and the outer mold fixing sleeve is arranged in the opening.

[0023] In some embodiments, the inner mold includes an entry section and a sealing section. The outer diameter of the entry section matches the inner diameter of the reinforced composite tube. The sealing section is an annular groove extending outward from one end of the entry section away from the end face and toward the end face. When the inner mold is pressed together with the outer mold, the entry section enters the reinforced composite tube, and the annular groove is sleeved outside the groove.

[0024] In some embodiments, an outer wall of the entry section near one end of the end surface contracts inwardly to form a conical surface.

[0025] In some embodiments, the annular groove includes a bottom surface and side walls on both sides of the bottom surface, the bottom surface width is less than or equal to the wall thickness of the reinforced composite tube and abuts against the groove, and the side walls abut against the inner wall and outer wall of the groove.

[0026] In some embodiments, the bottom surface is a plane, and the side wall is a curved surface or a straight surface inclined toward the outside of the annular groove.

[0027] In some embodiments, the connection between the bottom surface and the side wall is an arc surface.

[0028] In some embodiments, the inner wall of the outer mold is coated with a polytetrafluoroethylene anti-sticking layer, and the surface of the entry section and the annular groove are coated with a polytetrafluoroethylene anti-sticking layer.

[0029] In some embodiments, the inner mold device further comprises:

[0030] An inner mold moving seat, on which the inner mold and the outer mold are coaxially mounted relative to each other;

[0031] An inner mold guide rail, the inner mold guide rail is parallel to the length direction of the reinforced composite pipe, and the inner mold moving seat can reciprocate along the length direction of the inner mold guide rail to enable the inner mold to enter the end surface and cooperate with the outer mold to be pressed; and,

[0032] The inner mold driving component can drive the inner mold moving seat to move.

[0033] In some embodiments, the slotting device comprises:

[0034] turning tool;

[0035] A turning tool mounting plate, on which the turning tool is mounted, the turning tool mounting plate is parallel to the end face and can be rotated so that the turning tool rotates around the end face to cut off the middle reinforcement layer adjacent to the end face of the reinforced composite pipe;

[0036] A turning guide rail, wherein the turning guide rail is perpendicular to the length direction of the reinforced composite pipe;

[0037] A turning movable seat, a turning tool mounting plate is mounted on the turning movable seat, and the turning movable seat moves along the length direction of the turning guide rail to align the turning tool with the middle reinforcement layer of the end face; and,

[0038] The turning drive component can drive the turning tool mounting plate to rotate and the turning movable seat to move.

[0039] In some embodiments, the heating device comprises:

[0040] Hot air heater;

[0041] A hot air heater mounting plate, on which the hot air heater is mounted, the hot air heater mounting plate is parallel to the end surface and can rotate so that the hot air heater rotates around the groove and heats the groove;

[0042] A heating rail, wherein the heating rail is perpendicular to the length direction of the reinforced composite pipe;

[0043] A hot air movable seat, a hot air heater mounting plate is mounted on the hot air movable seat, and the hot air movable seat can move along the length direction of the heating guide rail to align the hot air heater with the groove; and,

[0044] The hot air driving member can drive the hot air heater mounting plate to rotate and the hot air moving seat to move.

[0045] A second aspect of the present invention provides a sealing method for a reinforced composite pipe, comprising the following steps:

[0046] S1: insert the reinforced composite pipe into an outer mold matching the outer diameter of the reinforced composite pipe, and open a groove at the middle reinforcement layer near the end face of the reinforced composite pipe; or open a groove at the middle reinforcement layer near the end face of the reinforced composite pipe, and insert the reinforced composite pipe into an outer mold matching the outer diameter of the reinforced composite pipe;

[0047] S2: heating the groove so that the inner layer and the outer layer of plastic at the position of the groove are in a molten state, and the groove is contained in the outer mold;

[0048] S3: inserting an inner mold matching the inner diameter of the reinforced composite pipe into the reinforced composite pipe from the end where the groove is located, and moving relative to the outer mold toward the groove, and keeping in contact with the inner side of the plastic inner layer and the inner periphery of the outer mold respectively during the movement, extruding molten plastic generated by melting the plastic inner layer and the plastic outer layer into the groove and sealing the middle reinforcement layer in the plastic with the closed end;

[0049] S4: The reinforced composite tube is removed from the inner mold and the outer mold.

[0050] Through the above technical solution, the groove opening device opens a groove at the middle reinforcement layer near the end face of the reinforced composite pipe, the heating device heats the groove to make the plastic inner layer and the plastic outer layer in a molten state, the inner mold is extended into the reinforced composite pipe along the direction of the groove and pressed with the outer mold sleeved outside the end face, the inner and outer layers of the molten plastic of the middle reinforcement layer in the groove are located in the outer mold and the inner mold, the outer mold is in contact with the inner side of the plastic inner layer and the inner periphery of the outer mold, the molten plastic is squeezed from the outer mold and the inner mold, enters the groove, and after cooling, the middle reinforcement layer is sealed in the plastic with the closed end. Due to the limitation of the inner mold and the outer mold, there will be no molten plastic overflow, the sealing material is sufficient, the sealing effect is good, and there is no need to polish the sealed port, so the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a side view of the automatic sealing machine disclosed in the embodiment of the present invention;

[0052] Figure 2 is a top view of the automatic sealing machine disclosed in an embodiment of the present invention;

[0053] Figure 3 is an overall diagram of the automatic sealing machine disclosed in the embodiment of the present invention;

[0054] Figure 4 is a schematic diagram of a positioning mechanism disclosed in an embodiment of the present invention;

[0055] Figure 5 is an overall diagram of the inner mold and the outer mold disclosed in the embodiment of the present invention;

[0056] Figure 6 is a cross-sectional view of the inner mold and the outer mold disclosed in the embodiment of the present invention;

[0057] Figure 7 is a cross-sectional view of the inner mold disclosed in the embodiment of the present invention;

[0058] Figure 8 is a cross-sectional view of the inner mold disclosed in the embodiment of the present invention;

[0059] Fig. 9 is a schematic diagram of the sealing process of the reinforced composite pipe disclosed in an embodiment of the present invention;

[0060] Fig.10 It is a diagram showing changes in the end surface of the reinforced composite pipe during the sealing process disclosed in an embodiment of the present invention.

[0061] Description of Reference Numerals

[0062] 1. Frame; 2. Reinforced composite pipe; 21. End face; 211. Groove; 3. Grooving device; 31. Turning tool; 32. Turning tool mounting plate; 33. Turning guide rail; 34. Moving seat; 35. Turning drive; 4. Heating device; 41. Hot air heater; 42. Hot air heater mounting plate; 43. Heating guide rail; 44. Hot air moving seat; 45. Hot air drive; 5. External mold device; 51. External mold; 52 External mold frame; 6. Inner mold device; 61, inner mold; 611, entry section; 612, annular groove; 6121, bottom surface; 6122, side wall; 62, inner mold moving seat; 63, inner mold guide rail; 64, inner mold driving member; 7, positioning mechanism; 71, positioning plate; 72, positioning guide rail; 73, positioning driving member; 8, clamping mechanism; 81, clamping seat; 811, upper clamping block; 812, lower clamping seat; 82, clamping rail; 83, clamping driving member. DETAILED DESCRIPTION

[0063] In the present invention, unless otherwise stated, the directions or positional relationships indicated by the directional words such as "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0064] In order to solve the problem that the mold in the prior art is a single mold, the end face is subjected to force during the extrusion process and flows in the opposite direction of the mold, resulting in insufficient sealing material, poor sealing effect, and molten plastic overflowing to the inner and outer edges of the end face, and an additional process is required to grind the inner and outer edges of the end face, resulting in high production costs, the present invention provides a sealing machine for a reinforced composite pipe, the reinforced composite pipe 2 having a plastic inner layer, an intermediate reinforcement layer and a plastic outer layer, such as Figure 1-3 and Fig. 9As shown, the sealing machine includes: a slotting device 3, which is configured to be able to open a groove 211 at the middle reinforcement layer adjacent to the end face 21 of the reinforced composite pipe 2; an outer mold device 5, which includes an outer mold 51, which matches the outer diameter of the reinforced composite pipe 2, so as to be suitable for being sleeved outside the reinforced composite pipe 2 at the position of the groove 211; a heating device 4, which can heat the end face 21 with the groove 211, so that the plastic inner layer and the plastic outer layer at the position of the groove 211 are in a molten state; and an inner mold device 6, which includes an inner mold 61, which can be inserted into the reinforced composite pipe 2 at the end where the groove 211 is located and move relative to the outer mold 51 toward the groove 211, and keep in contact with the inner side of the plastic inner layer and the inner periphery of the outer mold 51 respectively during the movement, so as to extrude the molten plastic generated by the melting of the plastic inner layer and the plastic outer layer into the groove 211 and seal the middle reinforcement layer in the plastic with the closed end. Through the above technical solution, the groove 211 is formed in the middle reinforcement layer of the reinforced composite tube 2 near the end face 21. The heating device 4 heats the groove 211 to make the inner and outer plastic layers in a molten state. The inner mold 61 is extended into the reinforced composite tube 2 along the direction of the groove 211 and pressed tightly with the outer mold 51 sleeved outside the end face 21. The inner and outer layers of the molten plastic of the middle reinforcement layer in the groove 211 are located in the outer mold 51 and the inner mold 61. The outer mold 51 contacts the inner side of the inner plastic layer and the inner periphery of the outer mold 51. The molten plastic is squeezed from the outer mold 51 and the inner mold 61 in two directions and enters the groove 211. After cooling, the middle reinforcement layer is sealed in the plastic with closed ends. Due to the limitation of the inner mold 61 and the outer mold 51, the molten plastic will not overflow, the sealing material is sufficient, the sealing effect is good, and there is no need to polish the sealed port, so the production cost is low. Fig. 9 The schematic diagram of the sealing process shown in FIG. 5 shows that the outer mold 51 is a static mold and the inner mold 61 is a dynamic mold. The inner mold 61 is inserted into the reinforced composite tube 2 and pressed together with the outer mold 51 for a certain period of time to seal the middle reinforcement layer. Of course, the outer mold 51 can also be set as a static mold, and the outer mold 51 moves synchronously with the reinforced composite tube 2 and is set outside the inner mold 61. Fig.10 As shown, it is a diagram showing the changes of the end face 21 during the sealing process. A groove 211 is opened at the middle reinforcement layer near the end face 21, and the plastics of the inner and outer layers of the groove 211 enter the depression to seal the middle reinforcement layer to complete the sealing.

[0065] In some embodiments, Figure 1-3 and Fig. 9As shown, the sealing machine also includes a delivery device, which can deliver the reinforced composite tube 2 through the opening of the outer mold 51 to the slotting and heating working position. When the reinforced composite tube 2 is in the slotting and heating working position, the end of the reinforced composite tube 2 protrudes outside the outer mold 51. After the reinforced composite tube 2 reaches the slotting and heating working position, the slotting device 3 opens a groove 211 on the end face 21, and the heating device 4 heats the groove 211, so that the plastic inner layer and the plastic outer layer of the groove 211 are in a molten state, and the reinforced composite tube 2 shrinks due to heat during the heating process, and the groove 211 retreats to be contained inside the outer mold 51. At this time, the reinforced composite tube 2 is in the sealing working position. When the outer mold 51 and the inner mold 61 are in the sealing working position, the groove 211 is pressed together to seal the middle reinforcement layer. When the reinforced composite tube 2 is in the slotting and heating working position, the end of the reinforced composite tube 2 is set to protrude from the outer mold 51, which is convenient for slotting and heating the end of the reinforced composite tube 2. The waste materials generated by the slotting are discharged outside the outer mold 51, and the heat generated during heating can also be dissipated around and will not be collected in the tube, and the heat of the reinforced composite tube 2 will not be transferred away by the outer mold 51. Of course, when the reinforced composite tube 2 reaches the slotting and heating working position, the end face 21 is included in the outer mold 51, and then the groove 211 is opened on the end face 21 included in the outer mold 51 and the groove 211 is heated. It is also possible to slot the reinforced composite tube 2 first, and then extend the reinforced composite tube 2 into the outer mold 51 for heating and sealing operations.

[0066] In some embodiments, Figure 1-4 As shown, in order to facilitate the batch sealing operation of the reinforced composite tube 2, so that the reinforced composite tube 2 is in the same position each time, the delivery device is configured to include a positioning mechanism 7 and a clamping mechanism 8. The positioning mechanism 7 is first used to position the reinforced composite tube 2 to the initial position, and then the clamping mechanism 8 is used to clamp the reinforced composite tube 2, and the reinforced composite tube 2 is delivered from the initial position to the slotting and heating working position.

[0067] In some embodiments, Figure 4 As shown, the positioning mechanism 7 includes: a positioning mounting frame, which is fixedly arranged at any position between the inner mold device 6 and the clamping mechanism 8, and the middle opening allows the reinforced composite pipe 2 to pass through and is perpendicular to the length direction of the reinforced composite pipe 2. Figure 4The middle is the same mounting frame as the outer mold frame 52, which saves space. Of course, the positioning mounting frame can also be set separately, as long as the position of the reinforced composite pipe 2 is unique; the positioning plate 71, the positioning plate 71 is installed on one side of the positioning mounting frame, and can move back and forth on the positioning mounting frame to stop the opening on the positioning mounting frame or release the opening. When the positioning plate 71 stops the opening on the positioning mounting frame and abuts against the end face 21, the reinforced composite pipe 2 is in the initial position; the positioning guide rail 72, the positioning guide rail 72 is installed on the same side of the positioning mounting frame as the positioning plate 71, and the positioning plate 71 moves back and forth on the positioning guide rail 72 to move back and forth on the positioning mounting frame; and the positioning drive member 73, the positioning drive member 73 can drive the positioning plate 71 to move, such as Figure 4 As shown, the positioning drive member 73 is a cylinder disposed on the top of the outer mold frame 52, which drives the positioning plate 71 to reciprocate on the positioning guide rail 72, so that the positioning plate 71 stops at the opening on the positioning mounting frame or releases the opening.

[0068] In some embodiments, Figure 1-3 As shown, the clamping mechanism 8 includes: a clamping seat 81, the clamping seat 81 includes an upper clamping block 811 and a lower clamping seat 812 that match the shape of the reinforced composite pipe 2, and at least two groups of the upper clamping block 811 and the lower clamping seat 812 are arranged along the length direction of the reinforced composite pipe 2 to ensure that the reinforced composite pipe 2 remains stable and does not change direction during the movement. The upper clamping block 811 can reciprocate in the vertical direction to clamp and fix the reinforced composite pipe 2, and by installing arc plates of different specifications in the upper clamping block 811 and the lower clamping seat 812, it is suitable for reinforced composite pipes of different specifications. The reinforced composite pipe 2 does not change the working axis of the reinforced composite pipe 2; the clamping track 82 is parallel to the length direction of the reinforced composite pipe 2, and the clamping seat 81 can reciprocate on the clamping track 82 to deliver the reinforced composite pipe 2 from the initial position to the slotting and heating working position; and the clamping drive 83, the clamping drive 83 can drive the upper clamping block 811 and the clamping seat 81 to move, and the clamping drive 83 includes a cylinder that drives the upper clamping block 811 to move up and down and a cylinder that drives the clamping seat 81 to reciprocate along the clamping track 82. Figure 3 As shown, vertical guide columns are fixed on both sides of the lower clamping seat 812, and the guide columns pass through both sides of the upper clamping block 811 to be connected to the top plate above the upper clamping block 811. The cylinder is arranged on the top plate, and the output end of the cylinder passes through the top plate to be connected to the upper clamping block 811. The cylinder drives the upper clamping block 811 to slide back and forth on the guide columns on both sides thereof, thereby clamping or releasing the reinforced composite pipe 2.

[0069] When the delivery device is actually used, the reinforced composite pipe 2 is first inserted into the clamping seat 81 and placed on the lower clamping seat 812. The upper clamping block 811 is in a state of releasing the reinforced composite pipe 2, and the positioning plate 71 is stopped at the opening on the positioning mounting frame. The end face 21 of the reinforced composite pipe 2 is pressed against the positioning plate 71, so that the reinforced composite pipe 2 is in the initial position and the positioning is completed. The positioning plate 71 is released from the opening on the positioning mounting frame, the upper clamping block 811 is driven to make the clamping seat 81 clamp the reinforced composite pipe 2, and then the clamping seat 81 is driven to move along the clamping track 82 to deliver the reinforced composite pipe 2 to the slotting and heating working position.

[0070] In some embodiments, Figure 5-6 As shown, the front and rear ends of the inner wall of the outer mold 51 expand outward to form a conical surface, which facilitates the insertion of the reinforced composite pipe 2 and the inner mold 61.

[0071] In some embodiments, Figure 4 As shown, the outer mold device 5 also includes an outer mold frame 52, and the outer mold 51 is installed on the outer mold frame 52 to fix the outer mold 51. The outer mold frame 52 has a vertical opening that matches the outer wall of the outer mold 51, and the outer mold 51 is fixedly sleeved in the opening. Figure 4 The middle and outer mold frames 52 and the positioning mounting frame are the same mounting frame, which simplifies the components.

[0072] In some embodiments, Figure 5-9 As shown, the inner mold 61 includes an entry section 611 and a sealing section. The outer diameter of the entry section 611 matches the inner diameter of the reinforced composite pipe 2. The sealing section is an annular groove 612 extending outward from one end of the entry section 611 away from the end face 21 and toward the end face 21. When the inner mold 61 is pressed together with the outer mold 51, the entry section 611 enters the reinforced composite pipe 2 and fits the inner wall of the reinforced composite pipe 2. The annular groove 612 is sleeved outside the groove 211 and abuts against the inner wall of the outer mold 51.

[0073] In some embodiments, Figure 6-8 As shown, the outer wall of the entry section 611 close to the end surface 21 shrinks inward to form a conical surface, which facilitates the inner mold 61 to enter the reinforced composite pipe 2.

[0074] In some embodiments, Figure 6-9 As shown, the annular groove 612 includes a bottom surface 6121 and side walls 6122 on both sides of the bottom surface 6121. The width of the bottom surface 6121 is less than or equal to the wall thickness of the reinforced composite tube 2. When pressed together with the outer mold 61, the bottom surface 6121 abuts against the groove 211, the side walls 6122 abut against the inner and outer walls of the groove 211, and the outer wall of the annular groove 612 abuts against the inner wall of the outer mold 61, limiting the moving direction of the inner and outer layers of the molten plastic of the groove 211, allowing the inner and outer layers of the molten plastic to enter the depression of the groove 211, and sealing the middle reinforcement layer in the plastic with closed ends to prevent the molten plastic from flowing out.

[0075] In some embodiments, the bottom surface 6121 and the side wall 6122 are different shapes, such as Fig. 9 As shown, after the sealing is completed, the shape of the end of the reinforced composite tube 2 corresponds to the shape of the bottom surface 6121 and the side wall 6122. Figure 6 As shown, the bottom surface 6121 is a plane, and the side wall 6122 is a curved surface inclined toward the outside of the annular groove 612. Figure 7 As shown, the bottom surface 6121 is a plane, the side wall 6122 is an inclined surface inclined toward the outside of the annular groove 612, and the connection between the bottom surface 6121 and the side wall 6122 is an arc surface. Figure 8 As shown, the bottom surface 6121 is a plane, and the side wall 6122 is an inclined surface inclined toward the outside of the annular groove 612. The side wall 6122 is inclined toward the outside of the annular groove 612, restricting the inner and outer layers of molten plastic from squeezing toward the middle, and maintaining a sharp corner or a blunt inverted angle on the outside of the annular groove 612 to prevent the molten plastic from turning outward, and forming a rounded seal. After the sealing is completed, there is no need to trim the end of the reinforced composite tube 2.

[0076] In some embodiments, the inner wall of the outer mold 51 is coated with a polytetrafluoroethylene anti-stick layer, and the surface of the entry section 611 and the annular groove 612 are coated with a polytetrafluoroethylene anti-stick layer to prevent the molten plastic from sticking to the outer mold 51 and the inner mold 61 during the sealing process.

[0077] In some embodiments, Figure 1-3 As shown, the inner mold device 6 also includes: an inner mold moving seat 62, on which the inner mold 61 is coaxially mounted relative to the outer mold 51; an inner mold guide rail 63, which is parallel to the length direction of the reinforced composite pipe 2, and the inner mold moving seat 62 can reciprocate along the length direction of the inner mold guide rail 63 so that the inner mold 61 enters the end face 21 and is pressed tightly with the outer mold 51; and an inner mold driving member 64, which can drive the inner mold moving seat 62 to move, and can be set as a cylinder in the prior art. When in use, the inner mold moving seat 62 is driven to move on the inner mold guide rail 63, so that the inner mold 61 enters the reinforced composite pipe 2, and is pressed tightly with the outer mold 61 for a certain period of time. After the sealing is completed, the inner mold moving seat 62 is driven to make the inner mold 61 withdraw from the reinforced composite pipe 2 and wait for the next operation.

[0078] In some embodiments, Figure 1-3As shown, the slotting device 3 uses a turning method to slot, and the slotting device 3 includes: a turning tool 31, the blade of the turning tool 31 is aligned with the middle reinforcement layer of the end face 21; a turning tool mounting plate 32, the turning tool 31 is mounted on the turning tool mounting plate 32, the turning tool mounting plate 32 is parallel to the end face 21, and can be rotated so that the turning tool 31 rotates around the end face 21, so that the turning tool 31 cuts off the middle reinforcement layer adjacent to the end face 21 of the reinforced composite pipe 2; a turning guide rail 33, the turning guide rail 33 is perpendicular to the reinforced composite pipe 2 The turning movable seat 34 is mounted on the turning movable seat 34, and the turning movable seat 34 moves along the length direction of the turning guide rail 33 to align the turning tool 31 with the middle reinforcement layer of the end face 21; and the turning drive 35, the turning drive 35 can drive the turning tool mounting plate 32 to rotate and the turning movable seat 34 to move, and the turning drive 35 is a motor that drives the turning tool mounting plate 32 to rotate in the prior art, and a cylinder that drives the turning movable seat 34 to move. When in use, the turning movable seat 34 is driven to move on the turning guide rail 33 to align the turning tool 31 with the middle reinforcement layer of the end face 21, and then the turning tool mounting plate 32 is driven to rotate, and the middle reinforcement layer of the end face 21 is cut to form a groove 211, and the groove is completed, and the groove is returned to the original position to wait for the next operation. Other methods can also be used for grooving, such as using a heatable groove that matches the shape of the middle reinforcement layer, and the groove is attached to the middle reinforcement layer and heated, so that the middle reinforcement layer is melted by heat to form a groove.

[0079] In some embodiments, Figure 1-3As shown, the heating device 4 adopts hot air heating, and the heating device 4 includes: a hot air heater 41, the air outlet of the hot air heater 41 is aligned with the groove 211; a hot air heater mounting plate 42, the hot air heater 41 is mounted on the hot air heater mounting plate 42, the hot air heater mounting plate 42 is parallel to the end face 21, and can rotate, so that the hot air heater 41 rotates around the groove 211 and heats the groove 211; a heating guide rail 43, the heating guide rail 43 is perpendicular to the length direction of the reinforced composite pipe 2; a hot air moving seat 44, the hot air heater mounting plate 42 is mounted on the hot air moving seat 44, the hot air moving seat 44 can move along the length direction of the heating guide rail 43, and the hot air heater 41 is aligned with the groove 211; and a hot air driving member 45, the hot air driving member 45 can drive the hot air heater mounting plate 42 to rotate and the hot air moving seat 44 to move, and the hot air driving member 45 is respectively a motor for driving the hot air heater mounting plate 42 to rotate and a cylinder for driving the hot air moving seat 44 to move. When in use, the hot air moving seat 44 is driven to move on the heating rail 43, the hot air heater 41 is aligned with the groove 211, the hot air heater 41 is turned on, and the hot air heater mounting plate 42 is driven to rotate so that the hot air heater 41 surrounds the groove 211 to heat the groove 211. After the inner and outer plastic layers of the groove 211 are in a molten state, the heating is completed and the heat is returned to the original position to wait for the next heating. Other heating methods can also be used, such as a heating plate, which is attached to the inner and outer plastic layers of the groove 211 and heated until the inner and outer plastic layers are in a molten state.

[0080] Sealing machines also include Figure 1-3 The frame 1 shown in the figure includes a horizontal operating table and a supporting frame below. An inner mold device 6, a slotting device 3 and a heating device 4, an outer mold device 5, a positioning mechanism 7, and a clamping mechanism 8 are arranged in sequence from left to right along the length direction of the operating table. The inner mold 61 is located on the side of the inner mold device 6 close to the outer mold device 5, and the slotting device 3 and the heating device 4 are respectively arranged on the upper and lower sides of the operating table. The positioning mechanism 7 can be set at any position between the inner mold device 6 and the clamping mechanism 8 along the length direction of the reinforced composite pipe 2. Specifically, the positioning mounting frame is set at any position between the inner mold device 6 and the clamping mechanism 8, and the other components of the positioning mechanism 7 are correspondingly installed on the positioning mounting frame. As shown Figure 1-4 In one embodiment of the positioning mounting frame, the outer mold frame 52 is used as the positioning mounting frame, and other components are installed on the side of the positioning mounting frame away from the inner mold device 6, which simplifies the components without affecting the use of the outer mold device 5 and reduces the space occupied by the entire sealing machine. Other components can also be installed on the side of the positioning mounting frame close to the inner mold device 6, or the positioning mounting frame can be separately set at any position between the inner mold device 6 and the clamping mechanism 8 along the length direction of the reinforced composite pipe 2.

[0081] When the sealing machine is in use, the PLC program is used to control each driving part, and the reinforced composite pipe 2 is inserted into the clamping seat 81. At this time, the clamping seat 81 is in an unclamped state, and the reinforced composite pipe 2 is moved until the end surface 21 of the reinforced composite pipe 2 abuts against the positioning plate 71, reaches the initial position, and completes the positioning. The positioning plate 71 is released from the opening on the positioning mounting frame, and the upper clamping block 811 is driven to make the clamping seat 81 clamp the reinforced composite pipe 2 and move along the clamping track 82, and deliver the reinforced composite pipe 2 to the slotting and heating working position. The turning movable seat 34 and the turning tool mounting plate 32 are driven to make the turning tool 31 open a groove 211 in the middle reinforcement layer of the end face 21; the hot air movable seat 44 and the hot air heater 41 are driven to make the hot air heater 41 surround the groove 211 and heat until the inner and outer plastic layers of the groove 211 are in a molten state, and the groove 211 shrinks during the heating process to be contained in the outer mold 51 and is in the sealing working position; the inner mold movable seat 62 is driven to move and insert the inner mold 61 into the reinforced composite tube 2 and press it together with the outer mold 61, and maintain it for a certain time. After the end is cooled, the sealing work is completed, and the reinforced composite tube 2 that has been sealed is returned and taken out from the inner mold 61 and the outer mold 51 for the next operation.

[0082] The present invention also includes a sealing method for a reinforced composite pipe, comprising the following steps:

[0083] S1: insert the reinforced composite tube 2 into the outer mold 51 matching the outer diameter of the reinforced composite tube 2, and open a groove 211 at the middle reinforcement layer near the end face 21 of the reinforced composite tube 2; or open a groove 211 at the middle reinforcement layer near the end face 21 of the reinforced composite tube 2, and insert the reinforced composite tube 2 into the outer mold 51 matching the outer diameter of the reinforced composite tube 2;

[0084] S2: heating the groove 211 so that the inner layer and the outer layer of plastic at the position of the groove 211 are in a molten state, and the groove 211 is contained in the outer mold 51;

[0085] S3: inserting the inner mold 61 matching the inner diameter of the reinforced composite tube 2 into the reinforced composite tube 2 from the end where the groove 211 is located, and moving relative to the outer mold 51 toward the groove 211, and keeping in contact with the inner side of the plastic inner layer and the inner periphery of the outer mold 51 respectively during the movement, extruding the molten plastic generated by melting the plastic inner layer and the plastic outer layer into the groove 211, and sealing the middle reinforcement layer in the plastic with the closed ends;

[0086] S4: withdraw the reinforced composite tube 2 from the inner mold 61 and the outer mold 51.

[0087] The sealing method can be performed by using the sealing machine provided by the present invention to realize the sealing operation of the reinforced composite pipe, thereby achieving a good sealing effect at a lower production cost and improving the service life of the reinforced composite pipe.

[0088] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A sealing machine for a reinforced composite pipe, wherein the reinforced composite pipe (2) comprises a plastic inner layer, an intermediate reinforcement layer and a plastic outer layer, characterized in that: The sealing machine comprises: A grooving device (3), the grooving device (3) being configured to be able to open a groove (211) at the middle reinforcement layer adjacent to the end surface (21) of the reinforced composite pipe (2); An outer mold device (5), the outer mold device (5) comprising an outer mold (51), the outer mold (51) matching the outer diameter of the reinforced composite pipe (2) so as to be suitable for being sleeved outside the reinforced composite pipe (2) at the position of the groove (211); a heating device (4), wherein the heating device (4) is capable of heating the end surface (21) with the groove (211) so that the inner plastic layer and the outer plastic layer at the position of the groove (211) are in a molten state; and An inner mold device (6), the inner mold device (6) comprising an inner mold (61), the inner mold (61) being capable of being inserted into the reinforced composite pipe (2) at one end where the groove (211) is located and moving toward the groove (211) relative to the outer mold (51), and maintaining contact with the inner side of the plastic inner layer and the inner periphery of the outer mold (51) respectively during the movement, so as to extrude molten plastic produced by melting the plastic inner layer and the plastic outer layer into the groove (211) and seal the intermediate reinforcement layer in the plastic with the ends closed.

2. The sealing machine for reinforced composite pipe according to claim 1, characterized in that: The sealing machine further comprises a delivery device, wherein the delivery device is capable of delivering the reinforced composite tube (2) through the opening of the outer mold (51) to a slotting and heating working position where the end surface (21) is located outside the outer mold (51); when the reinforced composite tube (2) is located at the slotting and heating working position, the slotting device (3) opens the slot (211) on the reinforced composite tube (2), and the heating device (4) heats the slot (211) so that the slot (211) is retracted to a sealing working position contained inside the outer mold (51); and the outer mold (51) and the inner mold (61) are pressed together when the slot (211) is at the sealing working position.

3. The sealing machine for reinforced composite pipe according to claim 2, characterized in that: The delivery device comprises a positioning mechanism (7) and a clamping mechanism (8), wherein the positioning mechanism (7) is capable of positioning the reinforced composite pipe (2) to an initial position, and the clamping mechanism (8) is capable of clamping the reinforced composite pipe (2) and delivering the reinforced composite pipe (2) from the initial position to a slotting and heating working position.

4. The sealing machine for reinforced composite pipe according to claim 3, characterized in that: The positioning mechanism (7) comprises: A positioning mounting frame, the positioning mounting frame is fixedly arranged between the inner mold device (6) and the clamping mechanism (8), the middle opening allows the reinforced composite pipe (2) to pass through, and is perpendicular to the length direction of the reinforced composite pipe (2); a positioning plate (71), the positioning plate (71) being mounted on one side of the positioning mounting frame and being capable of reciprocating on the positioning mounting frame to stop the opening on the positioning mounting frame or release the opening; when the positioning plate (71) stops the opening on the positioning mounting frame and abuts against the end surface (21), the reinforced composite pipe (2) is in an initial position; a positioning guide rail (72), the positioning guide rail (72) being mounted on the same side of the positioning mounting frame as the positioning plate (71), the positioning plate (71) reciprocating on the positioning guide rail (72) to reciprocate on the positioning mounting frame; and A positioning drive member (73), wherein the positioning drive member (73) is capable of driving the positioning plate (71) to move.

5. The sealing machine for reinforced composite pipe according to claim 3, characterized in that: The clamping mechanism (8) comprises: A clamping seat (81), the clamping seat (81) comprising an upper clamping block (811) and a lower clamping seat (812) matching the shape of the reinforced composite pipe (2), the upper clamping block (811) and the lower clamping seat (812) being arranged in at least two groups along the length direction of the reinforced composite pipe (2), the upper clamping block (811) being able to reciprocate in the vertical direction to clamp and fix the reinforced composite pipe (2); a clamping track (82), wherein the clamping track (82) is parallel to the length direction of the reinforced composite pipe (2), and the clamping seat (81) can reciprocate on the clamping track (82) to deliver the reinforced composite pipe (2) from the initial position to the slotting and heating working position; and A clamping driving member (83), wherein the clamping driving member (83) is capable of driving the upper clamping block (811) and the clamping seat (81) to move.

6. The sealing machine for reinforced composite pipe according to claim 1, characterized in that: The front and rear ends of the inner wall of the outer mold (51) expand outwards to form a conical surface; and / or, The outer mold device (5) further comprises an outer mold frame (52), the outer mold (51) is mounted on the outer mold frame (52) to fix the outer mold (51), the outer mold frame (52) has a vertical opening that matches the outer wall of the outer mold (51), and the outer mold (51) is fixedly sleeved in the opening.

7. The sealing machine for reinforced composite pipe according to claim 1, characterized in that: The inner die (61) comprises an entry section (611) and a sealing section. The outer diameter of the entry section (611) matches the inner diameter of the reinforced composite tube (2). The sealing section is an annular groove (612) extending outward from one end of the entry section (611) away from the end surface (21) and facing the end surface (21). When the inner die (61) is pressed together with the outer die (51), the entry section (611) enters the reinforced composite tube (2), and the annular groove (612) is sleeved outside the groove (211).

8. The sealing machine for reinforced composite pipe according to claim 7, characterized in that: The outer wall of one end of the entry section (611) close to the end surface (21) contracts inwardly to form a conical surface.

9. The sealing machine for reinforced composite pipe according to claim 7, characterized in that: The annular groove (612) comprises a bottom surface (6121) and side walls (6122) on both sides of the bottom surface (6121); the bottom surface (6121) has a width less than or equal to the wall thickness of the reinforced composite pipe (2) and abuts against the groove (211); and the side walls (6122) abut against the inner wall and the outer wall of the groove (211).

10. The sealing machine for reinforced composite pipe according to claim 9, characterized in that: The bottom surface (6121) is a plane, and the side wall (6122) is a curved surface or a straight surface inclined toward the outside of the annular groove (612); and / or, The connection between the bottom surface (6121) and the side wall (6122) is an arc surface.

11. The sealing machine for reinforced composite pipe according to claim 7, characterized in that: The inner wall of the outer mold (51) is coated with a polytetrafluoroethylene anti-sticking layer, and the surfaces of the entry section (611) and the annular groove (612) are coated with a polytetrafluoroethylene anti-sticking layer.

12. The sealing machine for reinforced composite pipe according to claim 1, characterized in that: The inner mold device (6) also includes: An inner mold moving seat (62), on which the inner mold (61) and the outer mold (51) are coaxially mounted relative to each other; an inner mold guide rail (63), the inner mold guide rail (63) being parallel to the length direction of the reinforced composite pipe (2), the inner mold movable seat (62) being capable of reciprocating along the length direction of the inner mold guide rail (63) so that the inner mold (61) enters the end surface (21) and is pressed tightly with the outer mold (51); and An inner mold driving component (64), wherein the inner mold driving component (64) can drive the inner mold moving seat (62) to move.

13. The sealing machine for reinforced composite pipe according to claim 1, characterized in that: The slotting device (3) comprises: Turning tool (31); a turning tool mounting plate (32), the turning tool (31) being mounted on the turning tool mounting plate (32), the turning tool mounting plate (32) being parallel to the end surface (21) and being rotatable so that the turning tool (31) rotates around the end surface (21) to cut away the intermediate reinforcement layer adjacent to the end surface (21) of the reinforced composite pipe (2); A turning guide rail (33), wherein the turning guide rail (33) is perpendicular to the length direction of the reinforced composite pipe (2); a turning movable seat (34), the turning tool mounting plate (32) being mounted on the turning movable seat (34), the turning movable seat (34) moving along the length direction of the turning guide rail (33) to align the turning tool (31) with the middle reinforcement layer of the end surface (21); and, A turning drive member (35), wherein the turning drive member (35) can drive the turning tool mounting plate (32) to rotate and the turning movable seat (34) to move.

14. The sealing machine for reinforced composite pipe according to claim 1, characterized in that: The heating device (4) comprises: Hot air heater (41); a hot air heater mounting plate (42), the hot air heater (41) being mounted on the hot air heater mounting plate (42), the hot air heater mounting plate (42) being parallel to the end surface (21) and being rotatable so that the hot air heater (41) rotates around the groove (211) and heats the groove (211); A heating rail (43), wherein the heating rail (43) is perpendicular to the length direction of the reinforced composite pipe (2); a hot air movable seat (44), the hot air heater mounting plate (42) being mounted on the hot air movable seat (44), the hot air movable seat (44) being movable along the length direction of the heating guide rail (43) to align the hot air heater (41) with the groove (211); and, A hot air driving member (45), wherein the hot air driving member (45) can drive the hot air heater mounting plate (42) to rotate and the hot air moving seat (44) to move.

15. A sealing method for a reinforced composite pipe, characterized in that: The following steps are involved: S1: inserting the reinforced composite tube (2) into an outer mold (51) matching the outer diameter of the reinforced composite tube (2), and providing a groove (211) at the middle reinforcement layer near the end surface (21) of the reinforced composite tube (2); or providing a groove (211) at the middle reinforcement layer near the end surface (21) of the reinforced composite tube (2), and inserting the reinforced composite tube (2) into an outer mold (51) matching the outer diameter of the reinforced composite tube (2); S2: heating the groove (211) so that the inner layer and the outer layer of plastic at the position of the groove (211) are in a molten state, and the groove (211) is contained in the outer mold (51); S3: inserting an inner mold (61) matching the inner diameter of the reinforced composite tube (2) into the reinforced composite tube (2) from the end where the groove (211) is located, and moving toward the groove (211) relative to the outer mold (51), and maintaining contact with the inner side of the plastic inner layer and the inner periphery of the outer mold (51) respectively during the movement, extruding molten plastic generated by melting the plastic inner layer and the plastic outer layer into the groove (211) and sealing the intermediate reinforcement layer in the plastic with the closed ends; S4: withdrawing the reinforced composite tube (2) from the inner mold (61) and the outer mold (51).

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