Squeezing machine for socket and spigot joint of composite pipe

Abstract

The invention discloses a squeezing machine for a socket and spigot joint of a composite pipe, which is characterized in that a squeezing cylinder is fixed on a rack, a feeding hole is formed in the downstream end of the squeezing cylinder, a squeezing piston is arranged in the squeezing cylinder, a screw extruder is fixed on the rack, the downstream of the squeezing cylinder is communicated with a material distributing joint, and a reversing valve is arranged between the material distributing joint and the squeezing cylinder; a plurality of material distributing pipes are arranged on the material distributing joint; a longitudinal guide rail is arranged on the machine frame, a longitudinal sliding seat is longitudinally and slidably installed on the longitudinal guide rail, the squeezing barrel and the extruder are both fixedly installed on the longitudinal sliding seat, a squeezing mold is installed on the machine frame and comprises an outer mold and a squeezing inner mold, the outer mold comprises an outer mold seat, and a plurality of outer mold single bodies are installed on the outer mold seat. A mold locking device is further fixedly mounted on the outer mold base; the squeezing inner mold is mounted on the rack; according to the extruding machine, materials extruded by the extruding machine are extruded into the extruding mold in an extruding mode, the filling force in the mold is larger, and the density of the formed socket and spigot joint is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of composite pipe socket joints, in particular to an extrusion machine for composite pipe socket joints. Background Art

[0002] At present, the composite pipes on the market mainly include steel mesh reinforced composite pipes, steel skeleton reinforced composite pipes and steel wire winding reinforced composite pipes. The composite pipes use the internal metal reinforcement structure to enhance the mechanical properties of the composite pipes. There are many ways to connect composite pipes during installation. The traditional connection methods include hot melting and threaded installation. Such connection methods are complicated to operate and inconvenient to install. At present, the connection of composite pipes mostly adopts the plug-in method. The two connected pipes are directly plugged in through the socket joint. After completion, they are compressed by the compression equipment to form a sealed pipeline. This plug-in method is fast and efficient, and has higher sealing performance. The current molding method of the socket joint is mainly to extrude the plastic through an extruder, and then directly extrude it through a molding die. This method of extrusion molding directly using an extruder has the following disadvantages: 1. The extrusion force of the material during continuous extrusion by the extruder is insufficient, and the insufficient extrusion force directly leads to insufficient filling force of the plastic filling molding die, resulting in insufficient compactness of the material and uneven density of the socket joint after molding; 2. The current molding mold generally includes an outer mold and an extrusion inner mold. Since a number of annular grooves are provided on the socket joint, molding grooves are also provided on the inner wall of the outer mold, so the outer mold needs to be opened and closed, and the outer mold opening of the current molding mold is driven to open and close by a cylinder, but this driving method has poor synchronization. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an extruder for a composite pipe socket joint, which uses an extruder to squeeze the material extruded by the extruder into an extrusion mold, so that the filling force in the mold is greater and the density of the formed socket joint is more uniform.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an extruder for a composite pipe socket joint, comprising a frame, an extrusion barrel is fixed on the frame, an extrusion inner cavity is arranged on the extrusion barrel, a feed port is arranged at the downstream end of the extrusion barrel, an extrusion piston pushed by an extrusion oil cylinder is arranged in the extrusion barrel, a screw extruder is fixed on the frame, the discharge port of the screw extruder is connected with the feed port of the extrusion barrel, a material distribution joint is connected to the downstream of the extrusion barrel, a reversing valve is also arranged between the material distribution joint and the extrusion barrel, and a plurality of material distribution pipes are arranged on the material distribution joint; a longitudinal guide rail is arranged on the frame, a longitudinal slide seat is longitudinally slidably mounted on the longitudinal guide rail, the extrusion barrel and the extruder are both fixedly mounted on the longitudinal slide seat, and the frame is provided with A longitudinal power device drives the longitudinal slide to slide, and an extrusion mold is also installed on the frame. The extrusion mold includes an outer mold and an extrusion inner mold that cooperate with each other. The outer mold includes an outer mold base fixed on the frame, and a plurality of outer mold monomers are radially slidably installed on the outer mold base. Each outer mold monomer is driven by an opening and closing mold driving mechanism fixed on the outer mold base, and a locking device for locking adjacent outer mold monomers is also fixedly installed on the outer mold base; the extrusion inner mold is installed on the frame through a longitudinal sliding mechanism, and the extrusion inner mold and the outer mold monomer after mold closing cooperate to form a mold cavity for forming a socket joint, the feed pipe is fixed to the extrusion inner mold and connected to the mold cavity, and a cooling device for cooling the formed socket joint is also provided on the outer mold monomer.

[0005] As a preferred solution, the mold opening and closing drive mechanism includes a drive ring plate rotatably mounted on the outer mold base, the drive ring plate is located on one side of the outer mold, an arc-shaped drive strip hole is provided on the drive ring plate, the arc-shaped drive strip hole extends in an arc from the center to the outside, each outer mold unit is provided with a transmission pin shaft constrained by the arc-shaped drive strip hole, and the drive ring plate is driven by the mold opening and closing rotation power device.

[0006] As a preferred solution, a plurality of constraint wheels are rotatably mounted on the outer mold base, and a constraint ring groove is arranged on the wheel surface of the constraint wheel. The driving ring plate is circular and the outer contour is constrained in the constraint ring groove of the constraint wheel. The mold opening and closing rotation power device includes an opening and closing mold cylinder hinged on the outer mold base at one end, and the other end of the opening and closing mold cylinder is hinged on the driving ring plate.

[0007] As a preferred solution, the locking device includes a locking clamp block, a locking groove is provided on the locking clamp block, the locking clamp block is fixed on the piston rod of the locking cylinder, the locking cylinder is fixed on the outer mold base and the piston rod slides radially, a locking module is provided on the outer mold monomer, and a locking slope is provided on the side of each locking module, and the locking modules on adjacent outer mold monomers cooperate with each other and are clamped by the locking groove on the locking clamp block.

[0008] As a preferred solution, the outer mold monomer includes an outer mold fixing seat, the outer mold fixing seat is radially slidably installed on the outer mold base, the outer mold body is fixed on the inner side of the outer mold fixing seat, the outer mold body is provided with a quarter arc outer mold surface, the locking module is arranged at both ends of the outer mold body, the cooling device includes a cooling chamber arranged on each outer mold body, the outer mold body is provided with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet are connected to the cooling water circulation supply device through a hose.

[0009] As a preferred solution, an upstream support and a downstream support are fixedly installed on the longitudinal slide, the extrusion barrel is fixed on the downstream support, the extrusion cylinder is fixed on the upstream support and the piston rod extends into the interior of the extrusion barrel, a three-way pipe section is fixed at the downstream end of the extrusion barrel, the reversing valve is connected to the three-way pipe section, the screw extruder is also fixed on the upstream support, and the discharge port of the screw extruder is connected and fixed to the three-way pipe section through a vertical connecting pipe section.

[0010] As a preferred solution, the longitudinal sliding mechanism includes a fixed support frame fixed on the frame, and the fixed support is provided with a first guide rod and a second guide rod, the first guide rod and the second guide rod are respectively located on both sides of the material distribution joint, and the first guide rod and the second guide rod are respectively slidably installed with inner mold connecting frames, and the inner mold connecting frames are respectively fixedly connected to the upstream end face of the extrusion inner mold.

[0011] As a preferred solution, the reversing valve includes a valve plate horizontally slidably mounted on the three-way pipe section, the valve plate is provided with a connecting hole connecting the inner channel of the three-way pipe section, and a driving cylinder for driving the valve plate to move horizontally is fixed to the outside of the three-way pipe section.

[0012] After adopting the above technical scheme, the effect of the present invention is as follows: the extrusion machine of the composite pipe socket joint includes a frame, an extrusion barrel is fixed on the frame, an extrusion inner cavity is arranged on the extrusion barrel, a feed port is arranged at the downstream end of the extrusion barrel, an extrusion piston pushed by an extrusion oil cylinder is arranged in the extrusion barrel, a screw extruder is fixed on the frame, the discharge port of the screw extruder is connected with the feed port of the extrusion barrel, a material distribution joint is connected downstream of the extrusion barrel, a reversing valve is also arranged between the material distribution joint and the extrusion barrel, and a plurality of material distribution pipes are arranged on the material distribution joint; a longitudinal guide rail is arranged on the frame, and a longitudinal guide rail is arranged on the longitudinal guide rail. A longitudinal slide is slidably mounted, the extrusion barrel and the extruder are both fixedly mounted on the longitudinal slide, a longitudinal power device is arranged on the frame to drive the longitudinal slide to slide, an extrusion mold is also mounted on the frame, the extrusion mold comprises an outer mold and an extrusion inner mold which cooperate with each other, the outer mold comprises an outer mold base fixed on the frame, a plurality of outer mold monomers are radially slidably mounted on the outer mold base, each outer mold monomer is driven by an opening and closing mold driving mechanism fixed on the outer mold base, and a locking device for locking adjacent outer mold monomers is also fixedly mounted on the outer mold base; the extrusion inner mold is mounted on the frame through a longitudinal sliding mechanism, and the extrusion inner mold is The inner mold and the closed outer mold monomer cooperate to form a mold cavity for forming the socket joint. The feed pipe is fixed to the inner mold and communicated with the mold cavity. The outer mold monomer is also provided with a cooling device for cooling the formed socket joint. First, the outer mold monomers are driven to merge and cooperate through the mold opening and closing drive mechanism, and then the adjacent outer mold monomers are locked by the mold locking device. Then the longitudinal power device drives the longitudinal slide seat to slide, driving the extrusion barrel and the extruder to slide longitudinally, and also driving the inner mold to slide longitudinally to cooperate with the outer mold to form a mold cavity. The longitudinal sliding mechanism ensures the stability of the longitudinal sliding of the inner mold, and the reversing valve is used to make the screw extruder continuously extrusion the inner mold. The material is squeezed into the cavity, and then the reversing valve is used to stop the squeezing of the material. The extrusion piston is pushed by the extrusion cylinder to squeeze the material out of the distribution joint, enter the distribution pipe, and enter the mold cavity for molding. Then it is cooled by the cooling device. After the cooling is completed, the adjacent outer mold monomer is unlocked, and the outer mold is opened, and the longitudinal power device drives the longitudinal slide to slide to make the extrusion barrel and the extruder retreat longitudinally, and also drives the extrusion inner mold to retreat longitudinally, remove the socket plug, and then repeat the above operation; the extruder uses the extrusion method to squeeze the material extruded by the extruder into the extrusion mold, the filling force in the mold is greater, and the density of the socket joint after molding is more uniform.

[0013] Furthermore, since the mold opening and closing driving mechanism includes a driving ring plate rotatably mounted on the outer mold base, the driving ring plate is located on one side of the outer mold, and an arc-shaped driving strip hole is arranged on the driving ring plate, and the arc-shaped driving strip hole extends in an arc shape from the center to the outside, each outer mold unit is provided with a transmission pin shaft constrained by the arc-shaped driving strip hole, and the driving ring plate is driven by the mold opening and closing rotating power device; the driving ring plate is driven to rotate by the mold opening and closing rotating power device, so that the arc-shaped driving strip hole can effectively rotate, so that the transmission pin shaft can be squeezed and driven by the arc-shaped driving strip hole, and the outer mold unit slides radially, thereby effectively controlling the opening and closing of the outer mold.

[0014] Since a plurality of constraint wheels are rotatably mounted on the outer mold base, a constraint ring groove is arranged on the wheel surface of the constraint wheel, the driving ring plate is circular and its outer contour is constrained in the constraint ring groove of the constraint wheel, the mold opening and closing rotation power device comprises a mold opening and closing cylinder hinged at one end on the outer mold base, and the other end of the mold opening and closing cylinder is hinged on the driving ring plate; the constraint wheel can effectively assist in supporting the rotation of the driving ring plate, and the constraint ring groove can effectively clamp the driving ring plate, thus ensuring stable rotation, and then the rotation amplitude of the driving ring plate can be controlled by extending and retracting the piston rod of the mold opening and closing cylinder, and both ends of the mold opening and closing cylinder are hinged, which is convenient for the coordination of the driving ring plate during rotation.

[0015] Furthermore, since the locking device includes a locking clamp, a locking groove is provided on the locking clamp, the locking clamp is fixed on the piston rod of the locking cylinder, the locking cylinder is fixed on the outer mold base and the piston rod slides radially, a locking module is provided on the outer mold monomer, and a locking slope is provided on the side of each locking module, and the locking modules on adjacent outer mold monomers cooperate with each other and are clamped by the locking groove on the locking clamp; the locking clamp is driven by the locking cylinder to radially expand and contract, and then the opening and closing mold cylinder drives the outer mold monomers to merge to form the outer mold, so that the locking modules will cooperate with each other, the locking modules are in the locking groove, and the locking slope can effectively guide the locking clamp, thereby ensuring accurate locking, and after locking, the stress during extrusion molding is effectively dispersed, thereby improving the molding effect.

[0016] Furthermore, since the outer mold monomer includes an outer mold fixing seat, the outer mold fixing seat is radially slidably installed on the outer mold base, the outer mold body is fixed on the inner side of the outer mold fixing seat, and a quarter-arc outer mold surface is provided on the outer mold body, and the locking modules are arranged at both ends of the outer mold body, and the cooling device includes a cooling chamber arranged on each outer mold body, and a cooling water inlet and a cooling water outlet are provided on the outer mold body, and the cooling water inlet and the cooling water outlet are connected with a cooling water circulation supply device through a hose; the outer mold fixing seat and the outer mold body are fixedly installed with each other, which is convenient for production and installation, and the outer mold body can be replaced separately to improve practicality, and the outer mold body can be effectively formed through the radial sliding of the outer mold fixing seat, which is convenient for subsequent shedding; at the same time, the entry of cooling water during molding can effectively cool the outer mold body, thereby accelerating the molding in the mold cavity and ensuring the molding efficiency.

[0017] Since the upstream support and the downstream support are fixedly installed on the longitudinal slide, the extrusion barrel is fixed on the downstream support, the extrusion oil cylinder is fixed on the upstream support and the piston rod extends into the interior of the extrusion barrel, a three-way pipe section is fixed on the downstream end of the extrusion barrel, the reversing valve is connected to the three-way pipe section, and the screw extruder is also fixed on the upstream support, and the discharge port of the screw extruder is connected and fixed to the three-way pipe section through a vertical connecting pipe section; in this way, the upstream support and the downstream support are both fixedly installed on the longitudinal slide to ensure synchronous sliding, and then the feeding and discharging can be flexibly switched through the reversing valve connected to the three-way pipe section, which is simple and convenient to use.

[0018] Furthermore, since the longitudinal sliding mechanism includes a fixed support frame fixed on the frame, a first guide rod and a second guide rod are provided on the fixed support, the first guide rod and the second guide rod are respectively located on both sides of the material distribution joint, and inner mold connecting frames are respectively slidably installed on the first guide rod and the second guide rod, and the inner mold connecting frames are respectively fixedly connected to the upstream end surface of the extrusion inner mold; since the extrusion inner mold moves synchronously when the longitudinal slide moves, the support of the first guide rod and the second guide rod can ensure the stability of the longitudinal movement of the extrusion inner mold, so that the extrusion inner mold and the outer mold can be accurately matched.

[0019] Furthermore, since the reversing valve includes a valve plate horizontally slidably mounted on the three-way pipe section, a connecting hole for connecting the inner channel of the three-way pipe section is arranged on the valve plate, and a driving cylinder for driving the valve plate to move horizontally is fixed to the outside of the three-way pipe section; the driving cylinder can effectively drive the valve plate to slide, thereby changing the position of the connecting hole, and the connecting hole can ensure that the piston rod of the extrusion cylinder squeezes the material of the extrusion barrel into the material distribution joint through the connecting hole; the switching is flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is a stereogram of an embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view of an embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of one end of the outer mold and the extrusion inner mold of an embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the other end of the outer mold and the extrusion inner mold in an embodiment of the present invention;

[0025] Figure 5 It is a front view of the outer mold of an embodiment of the present invention;

[0026] Figure 6 is a cross-sectional view of an outer mold and an extrusion inner mold according to an embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of a mold monomer outside the embodiment of the present invention;

[0028] Figure 8 2 is a schematic structural diagram of an extrusion inner mold according to an embodiment of the present invention;

[0029] Fig. 9 yes Figure 1 A partial enlarged view of point A;

[0030] In the attached figure: 1, outer mold base; 2, outer mold unit; 3, material distribution joint; 4, clamping cylinder; 5, material distribution pipe; 6, driving ring plate; 7, arc-shaped driving strip hole; 8, driving pin shaft; 9, restraining wheel; 10, restraining ring groove; 11, opening and closing mold cylinder; 12, connecting plate; 13, clamping block; 14, clamping groove; 15, locking module; 16, locking inclined surface; 17, outer mold fixing seat; 18, outer mold body; 19, outer mold surface; 2 0, radial strip hole; 21, through strip hole; 22, guide roller; 23, cooling chamber; 24, cooling water inlet; 25, cooling water outlet; 26, upstream inner mold cylinder; 27, downstream inner mold cylinder; 28, flange; 29, injection hole; 30, upstream inner mold ring plate; 31, downstream connecting ring plate; 32, downstream inner mold ring plate; 33, fixed support frame; 34, first guide rod; 35, second guide rod; 36, inner mold connecting frame;

[0031] 101. Frame; 102. Extrusion barrel; 103. Extrusion inner cavity; 104. Feed inlet; 105. Extrusion piston; 106. Extrusion cylinder; 107. Screw extruder; 108. Discharge outlet; 109. Reversing valve; 110. Longitudinal guide rail; 111. Longitudinal slide seat; 112. Upstream support; 113. Downstream support; 114. Three-way pipe section; 115. Connecting pipe section; 116. Fixed plate; 117. Longitudinal sliding cylinder; 118. Valve plate; 119. Connecting hole; 120. Driving cylinder. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below through specific examples.

[0033] like Figures 1 to 9 As shown, an extrusion machine for composite pipe socket joints includes a frame 101, an extrusion barrel 102 is fixed on the frame 101, an extrusion inner cavity 103 is provided on the extrusion barrel 102, a feed port 104 is provided at the downstream end of the extrusion barrel 102, an extrusion piston 105 pushed by an extrusion oil cylinder 106 is provided in the extrusion barrel 102, a screw extruder 107 is fixed on the frame 101, and a discharge port 103 of the screw extruder 107 is provided. 08 is connected with the feed port 104 of the extrusion barrel 102, the downstream of the extrusion barrel 102 is connected with a material distribution joint 3, a reversing valve 109 is also provided between the material distribution joint 3 and the extrusion barrel 102, and a plurality of material distribution pipes 5 are provided on the material distribution joint 3; a longitudinal guide rail 110 is provided on the frame 101, and a longitudinal slide 111 is longitudinally slidably installed on the longitudinal guide rail 110, and the extrusion barrel 102 and the extruder are fixedly installed in the On the longitudinal slide 111, a longitudinal power device for driving the longitudinal slide 111 to slide is arranged on the frame 101, and an extrusion mold is also installed on the frame 101, and the extrusion mold includes an outer mold and an extrusion inner mold that cooperate with each other, and the outer mold includes an outer mold base 1 fixed on the frame 101, and a plurality of outer mold monomers 2 are radially slidably installed on the outer mold base 1, and each outer mold monomer 2 is driven by an opening and closing mold driving mechanism fixed on the outer mold base 1, and a locking device for locking adjacent outer mold monomers 2 is also fixedly installed on the outer mold base 1; the extrusion inner mold is installed on the frame 101 through a longitudinal sliding mechanism, and the extrusion inner mold and the outer mold monomer 2 after mold closing cooperate to form a mold cavity for forming a socket joint, the distribution pipe 5 is fixed to the extrusion inner mold and connected to the mold cavity, and a cooling device for cooling the formed socket joint is also arranged on the outer mold monomer 2.

[0034] like Figures 3 to 5As shown, the mold opening and closing driving mechanism includes a driving ring plate 6 rotatably mounted on the outer mold base 1, the driving ring plate 6 is located on one side of the outer mold, and an arc-shaped driving strip hole 7 is provided on the driving ring plate 6, and the arc-shaped driving strip hole 7 extends in an arc shape from the center to the outside, and each outer mold monomer 2 is provided with a transmission pin shaft 8 constrained by the arc-shaped driving strip hole 7, and the driving ring plate 6 is driven by the mold opening and closing rotary power device; the outer mold base 1 is a closed frame, and the driving ring plate 6 is driven to rotate by the mold opening and closing rotary power device, so that the arc-shaped driving strip hole 7 can effectively rotate, so that the transmission pin shaft 8 can be squeezed and driven by the arc-shaped driving strip hole 7, and the outer mold monomer 2 can slide radially, thereby effectively controlling the opening and closing of the outer mold.

[0035] Furthermore, a plurality of constraint wheels 9 are rotatably mounted on the outer mold base 1, and a constraint ring groove 10 is arranged on the wheel surface of the constraint wheel 9. The driving ring plate 6 is circular and its outer contour is constrained in the constraint ring groove 10 of the constraint wheel 9. The mold opening and closing rotation power device includes a mold opening and closing cylinder 11, one end of which is hinged on the outer mold base 1, and the other end of the mold opening and closing cylinder 11 is hinged on the driving ring plate 6 through a connecting plate 12; there are four constraint wheels 9, which are respectively located around the driving ring plate 6. The constraint wheels 9 can effectively assist in supporting the rotation of the driving ring plate 6, and the constraint ring groove 10 can effectively clamp the driving ring plate 6, so as to ensure stable rotation. Then, the rotation amplitude of the driving ring plate 6 can be controlled by extending and retracting the piston rod of the mold opening and closing cylinder 11. Both ends of the mold opening and closing cylinder 11 are hinged, which is convenient for the coordination of the driving ring plate 6 when rotating.

[0036] like Figure 3 and Figure 7 As shown, the locking device includes a locking clamp 13, a locking groove 14 is provided on the locking clamp 13, the locking clamp 13 is fixed on the piston rod of the locking cylinder 4, the locking cylinder 4 is fixed on the outer mold base 1 and the piston rod slides radially, and a locking module 15 is provided on the outer mold monomer 2, and a locking slope 16 is provided on the side of each locking module 15. The locking modules 15 on adjacent outer mold monomers 2 cooperate with each other and are clamped by the locking groove on the locking clamp; the locking clamp 13 is driven to extend radially by the locking cylinder 4, and then the opening and closing mold cylinder 11 drives the outer mold monomers 2 to merge to form an outer mold, so that the locking modules 15 will cooperate with each other, the locking modules 15 are in the locking groove 14, and the locking slope 16 can effectively guide the locking clamp, thereby ensuring accurate locking, and after locking, the stress during extrusion molding is effectively dispersed, thereby improving the molding effect.

[0037] like Figure 7As shown, the outer mold monomer 2 includes an outer mold fixing seat 17, and the outer mold fixing seat 17 is radially slidably installed on the outer mold base 1. An outer mold body 18 is fixed on the inner side of the outer mold fixing seat 17, and a quarter arc outer mold surface 19 is provided on the outer mold body 18. The locking module 15 is arranged at both ends of the outer mold body 18; the transmission pin 8 is fixedly installed on the outer mold fixing seat 17, and guide rollers 22 are vertically fixed on both sides of the transmission pin 8 on the outer mold fixing seat 17, and a pair of vertical guide rollers 22 are provided on the outer mold base 1. The roller 22 constrains the radial strip hole 20 that enables the radial sliding of the outer mold body 18, and then the outer mold base 1 is provided with a through strip hole 21 through which the transmission pin 8 slides radially, so that when the arc-shaped driving strip hole 7 squeezes the transmission pin 8, the radial sliding of the outer mold body 18 is stable, and the outer mold fixing base 17 and the outer mold body 18 are fixed to each other, which is convenient for production and installation, and the outer mold body 18 can be replaced separately, thereby improving practicality. The outer mold can effectively form the outer mold body 18 through the radial sliding of the outer mold fixing base 17, which is convenient for subsequent shedding.

[0038] like Figure 6 and Figure 7 As shown, the cooling device includes a cooling chamber 23 arranged on each outer mold body 18, and a cooling water inlet 24 and a cooling water outlet 25 are arranged on the outer mold body 18, and the cooling water inlet 24 and the cooling water outlet 25 are connected to the cooling water circulation supply device through a hose; the cooling water is input into the cooling chamber 23 through the cooling water inlet 24 through the cooling water circulation supply device, and then discharged from the cooling water outlet 25, so that the outer mold body 18 is effectively circulated to cool, thereby effectively forming the socket joint and improving the use effect.

[0039] like Figure 6 and Figure 8 As shown, the extrusion inner mold includes an upstream inner mold cylinder 26 and a downstream inner mold cylinder 27. The upstream end of the upstream inner mold cylinder 26 is provided with a flange portion 28, and the flange portion 28 is provided with a plurality of injection holes 29 connected to the material distribution pipe 5. The upstream end face and the downstream end face of the upstream inner mold cylinder 26 are also provided with an upstream inner mold ring plate 30 and a downstream connecting ring plate 31, respectively. The upstream inner ring template is slidably mounted on a longitudinal sliding bracket and is connected to the reversing valve 109; the downstream inner mold cylinder 27 is provided with a flange portion 28, and a plurality of injection holes 29 are provided on the flange portion 28. The diameter is smaller than that of the upstream inner mold cylinder 26, and a downstream inner mold ring plate 32 is provided at the upstream end of the downstream inner mold cylinder 27, and the downstream inner mold ring plate 32 is fixed to the downstream connecting ring plate 31 by bolts; it is divided into the upstream inner mold cylinder 26 and the downstream inner mold cylinder 27, which is convenient for production and assembly, and the upstream inner mold ring plate 30 ensures the accuracy and stability of the extrusion inner mold during axial movement, and the downstream connecting ring plate 31 and the downstream inner mold ring plate 32 facilitate the connection between the upstream inner mold cylinder 26 and the downstream inner mold cylinder 27

[0040] like Figure 1 and 2 As shown, the upstream support 112 and the downstream support 113 are fixedly installed on the longitudinal slide 111, the extrusion barrel 102 is fixed on the downstream support 113, the extrusion oil cylinder 106 is fixed on the upstream support 112 and the piston rod extends into the interior of the extrusion barrel 102, the downstream end of the extrusion barrel 102 is fixed with a three-way pipe section 114, the reversing valve 109 is connected to the three-way pipe section 114, the screw extruder 107 is also fixed on the upstream support 112, and the discharge port 108 of the screw extruder 107 is connected and fixed to the three-way pipe section 114 through a vertical connecting pipe section 115; the longitudinal slide 111 is fixedly installed with The fixed plate 116, the upstream support 112 and the downstream support 113 are all fixed on the fixed plate 116, so that the upstream support 112 and the downstream support 113 can slide longitudinally synchronously. The longitudinal power device includes a longitudinal sliding cylinder 117, one end of the longitudinal sliding cylinder 117 is hinged to the end of the frame 101, and the other end of the longitudinal sliding cylinder 117 is hinged to the longitudinal slide 111. When the piston rod of the longitudinal sliding cylinder 117 is extended or retracted, the longitudinal sliding cylinder 117 can drive the longitudinal slide 111 to slide, thereby making the upstream support 112 and the downstream support 113 slide. The reversing valve 109 connected to the three-way pipe section 114 can flexibly switch between feeding and discharging, which is simple and convenient to use.

[0041] like Figure 4 and Figure 6 As shown, the longitudinal sliding mechanism includes a fixed support frame 33 fixed on the frame 101, and a first guide rod 34 and a second guide rod 35 are arranged on the fixed support, and the first guide rod 34 and the second guide rod 35 are respectively located on both sides of the material distribution joint 3, and inner mold connecting frames 36 are respectively slidably installed on the first guide rod 34 and the second guide rod 35, and the inner mold connecting frames 36 are respectively fixedly connected to the upstream inner ring template of the extrusion inner mold; since the extrusion inner mold moves synchronously when the longitudinal slide 111 moves, the support of the first guide rod 34 and the second guide rod 35 can ensure the stability of the longitudinal movement of the extrusion inner mold, so that the extrusion inner mold and the outer mold can be accurately matched.

[0042] In this embodiment, the reversing valve 109 includes a valve plate 118 horizontally slidably mounted on the three-way pipe section 114, and the valve plate 118 is provided with a connecting hole 119 connecting the inner channel of the three-way pipe section 114, and a driving cylinder 120 for driving the valve plate 118 to move horizontally is fixed to the outside of the three-way pipe section 114; the driving cylinder 120 can effectively drive the valve plate 118 to slide, thereby changing the position of the connecting hole 119, and the connecting hole 119 can ensure that the piston rod of the extrusion cylinder 106 squeezes the material of the extrusion barrel 102 into the material distribution joint 3 through the connecting hole 119; the switching is flexible and convenient.

[0043] The working principle of this embodiment is as follows: first, the piston rod of the mold opening and closing cylinder 11 is retracted to merge the outer mold monomer 2 to form an outer mold, the mold locking cylinder 4 drives the clamping block to extend, and the mold locking groove 14 clamps the locking module 15, then the piston rod of the longitudinal sliding cylinder 117 is retracted, driving the extrusion inner mold to slide longitudinally and cooperate with the outer mold to form a mold cavity, and then the driving cylinder 120 drives the valve plate 118 to slide horizontally to block the channel between the extrusion barrel 102 and the material distribution joint 3, and the screw extruder 107 extrude the material from the discharge port 108 into the extrusion barrel 102, and then drives the valve plate 118 to slide horizontally to make the extrusion barrel 102 2 is connected with the material distribution joint 3, the extrusion oil cylinder 106 pushes the piston to squeeze the material in the extrusion barrel 102 into the material distribution joint 3, and then into the material distribution pipe 5, and finally squeezed into the mold cavity from the injection hole 29 of the extrusion inner mold to complete the injection molding, and finally the cooling water is input into the cooling chamber 23 through the cooling water circulation supply device to the cooling water inlet 24, and then discharged from the cooling water outlet 25 to cool the socket joint, the clamping cylinder 4 drives the clamping block to retract, the piston rod of the opening and closing cylinder 11 extends, the outer mold is opened, and the extrusion inner mold is withdrawn at the same time, the socket joint is removed, and then the above operation is repeated.

[0044] 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 extrusion machine for composite pipe socket joints, comprising a frame, characterized in that: An extrusion barrel is fixed on the frame, an extrusion inner cavity is arranged on the extrusion barrel, a feed port is arranged at the downstream end of the extrusion barrel, an extrusion piston pushed by an extrusion oil cylinder is arranged in the extrusion barrel, a screw extruder is fixed on the frame, the discharge port of the screw extruder is connected with the feed port of the extrusion barrel, a material distribution joint is connected to the downstream of the extrusion barrel, a reversing valve is also arranged between the material distribution joint and the extrusion barrel, and a plurality of material distribution pipes are arranged on the material distribution joint; a longitudinal guide rail is arranged on the frame, a longitudinal slide seat is longitudinally slidably installed on the longitudinal guide rail, the extrusion barrel and the extruder are both fixedly installed on the longitudinal slide seat, a longitudinal power device for driving the longitudinal slide seat to slide is arranged on the frame, and the An extrusion mold is also installed on the frame, and the extrusion mold includes an outer mold and an extrusion inner mold that cooperate with each other. The outer mold includes an outer mold base fixed on the frame, and a plurality of outer mold monomers are radially slidably installed on the outer mold base. Each outer mold monomer is driven by an opening and closing mold driving mechanism fixed on the outer mold base, and a locking device for locking adjacent outer mold monomers is also fixedly installed on the outer mold base; the extrusion inner mold is installed on the frame through a longitudinal sliding mechanism, and the extrusion inner mold and the outer mold monomer after mold closing cooperate to form a mold cavity for forming a socket joint, the feed pipe is fixed to the extrusion inner mold and connected to the mold cavity, and a cooling device for cooling the formed socket joint is also provided on the outer mold monomer.

2. The extrusion machine for composite pipe socket joint according to claim 1, characterized in that: The mold opening and closing driving mechanism includes a driving ring plate rotatably mounted on the outer mold base, the driving ring plate is located on one side of the outer mold, an arc-shaped driving strip hole is provided on the driving ring plate, the arc-shaped driving strip hole extends in an arc from the center to the outside, and each outer mold monomer is provided with a transmission pin shaft constrained by the arc-shaped driving strip hole, and the driving ring plate is driven by the mold opening and closing rotating power device.

3. The extrusion machine for composite pipe socket joint according to claim 2, characterized in that: A plurality of constraining wheels are rotatably mounted on the outer mold base, and a constraining ring groove is arranged on the wheel surface of the constraining wheel. The driving ring plate is circular and its outer contour is constrained in the constraining ring groove of the constraining wheel. The mold opening and closing rotating power device includes a mold opening and closing cylinder hinged on the outer mold base at one end, and the other end of the mold opening and closing cylinder is hinged on the driving ring plate.

4. The extrusion machine for composite pipe socket joint according to claim 3, characterized in that: The clamping device includes a clamping block, a clamping groove is provided on the clamping block, the clamping block is fixed on the piston rod of the clamping cylinder, the clamping cylinder is fixed on the outer mold base and the piston rod slides radially, a locking module is provided on the outer mold monomer, a locking inclined surface is provided on the side of each locking module, and the locking modules on adjacent outer mold monomers cooperate with each other and are clamped by the locking groove on the locking clamping block.

5. The extrusion machine for composite pipe socket joint according to claim 4, characterized in that: The outer mold monomer includes an outer mold fixing seat, which is radially slidably installed on the outer mold base, an outer mold body is fixed on the inner side of the outer mold fixing seat, a quarter arc outer mold surface is provided on the outer mold body, the locking module is arranged at both ends of the outer mold body, the cooling device includes a cooling chamber arranged on each outer mold body, a cooling water inlet and a cooling water outlet are provided on the outer mold body, and the cooling water inlet and the cooling water outlet are connected to the cooling water circulation supply device through a hose.

6. The extrusion machine for composite pipe socket joint according to claim 5, characterized in that: An upstream support and a downstream support are fixedly mounted on the longitudinal slide, the extrusion barrel is fixed on the downstream support, the extrusion cylinder is fixed on the upstream support and the piston rod extends into the interior of the extrusion barrel, a three-way pipe section is fixed on the downstream end of the extrusion barrel, the reversing valve is connected to the three-way pipe section, the screw extruder is also fixed on the upstream support, and the discharge port of the screw extruder is connected and fixed to the three-way pipe section through a vertical connecting pipe section.

7. The extrusion machine for composite pipe socket joint according to claim 6, characterized in that: The longitudinal sliding mechanism includes a fixed support frame fixed on the frame, and a first guide rod and a second guide rod are arranged on the fixed support frame. The first guide rod and the second guide rod are respectively located on both sides of the material distribution joint, and inner mold connecting frames are respectively slidably installed on the first guide rod and the second guide rod, and the inner mold connecting frames are respectively fixedly connected to the upstream end surface of the extrusion inner mold.

8. The extrusion machine for composite pipe socket joint according to claim 7, characterized in that: The reversing valve includes a valve plate horizontally slidably mounted on the three-way pipe section, the valve plate is provided with a connecting hole connecting the inner channel of the three-way pipe section, and a driving cylinder for driving the valve plate to move horizontally is fixed to the outside of the three-way pipe section.

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