Pipe joint injection molding equipment

Abstract

The utility model relates to the technical field of pipe processing, in particular to pipe joint injection molding equipment which comprises a pipe conveying device used for moving pipes, a preheating box used for preheating the pipes and an injection molding device used for forming joints through injection molding, and the pipe conveying device, the preheating box and the injection molding device are sequentially arranged in a straight line. A heating mechanism is arranged in the preheating box, a preheating hole for the pipe to pass through is formed in the side face, perpendicular to the moving direction of the pipe, of the preheating box, the part, needing injection molding, of the end of the pipe can completely stretch into the preheating box to be preheated, the end of the pipe is preheated evenly and fully, and the injection molding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe processing, and more specifically, to an injection molding device for pipe joints. Background Art

[0002] In the current industry, composite pipes are connected by metal crimping joints. The material of this metal fastener is carbon steel, which is easy to rust and affect water quality. The production process requires operations such as sealing the pipe ends, processing the fasteners, assembling the fasteners, and crimping the fasteners and pipes, which is relatively complex.

[0003] Patent CN107471531A discloses a composite pipe injection molding and sealing device, which includes an injection molding component, a preheating component, a conveying component and a controller. The preheating component includes: a heating plate, a transmission unit and a motor. The heating plate is connected to the motor through the transmission unit, and the motor is connected to the controller; the injection molding component includes: an injection molding machine and a mold. The mold is used to fix the composite pipe and form a cavity with its end face to be sealed; the conveying component includes: a track, a pushing plate, at least one clamping unit, and a first driving unit. The pushing plate is clamped on the track. The clamping unit is used to fix the composite pipe, which is arranged on the pushing plate. The first driving unit is used to drive the pushing plate to move on the track. The composite pipe is preheated and then subjected to embedded injection molding. Through reasonable process conditions, firm sealing is achieved, and through the controller, automated operation is realized, saving manpower. However, in the above solution, the preheating component can only preheat the end face of the pipe. When this device is used for injection molding joints, the part of the pipe end that needs to be injection molded cannot be fully preheated, which may lead to a reduction in injection molding quality. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an injection molding device for pipe joints, which preheats the pipe before it enters the injection molding device to improve the injection molding effect.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] Provide an injection molding device for pipe joints, including a pipe feeding device for moving the pipe, a preheating box for preheating the pipe, and an injection molding device for injection molding to form joints. The pipe feeding device, the preheating box and the injection molding device are arranged in a straight line in sequence. A heating mechanism is provided in the preheating box, and a preheating hole for the pipe to pass through is provided on the side surface of the preheating box perpendicular to the movement direction of the pipe.

[0007] The pipe joint injection molding equipment of the present utility model, when producing injection molded joints, fixes the pipe on the pipe feeding device. The pipe feeding device transports the end of the pipe to the preheating box, and the end of the pipe is inserted into the preheating hole. The heating mechanism in the preheating box fully preheats the end of the pipe. After preheating is completed, the pipe is continuously transported to the injection molding device to inject a joint at the end of the pipe, reducing material and production costs, simplifying the production process, and improving production efficiency; the part of the pipe end that needs to be injection molded can be completely inserted into the preheating box for preheating, making the preheating of the pipe end uniform and sufficient, and improving the injection molding quality.

[0008] Further, the preheating box includes a plurality of sub-preheating boxes and a first moving component for driving each group of sub-preheating boxes to merge or separate. The sub-preheating box is provided with a sub-preheating hole, and each group of the sub-preheating holes surrounds to form the preheating hole. During preheating, the first moving component drives each group of sub-preheating boxes to move away from each other, moves the end of the pipe between each group of sub-preheating boxes, and then the first moving component drives each group of sub-preheating boxes to merge. The heating mechanism preheats the end of the pipe, and then separates the sub-preheating boxes, and the pipe continues to move, so that the part that does not need to be preheated passes through the preheating pipe without being heated.

[0009] Further, there are two groups of the sub-preheating boxes. The first moving component includes a first chassis and a pushing mechanism. The sub-preheating box is slidably connected to the first chassis, and the sliding directions of each group of sub-preheating boxes are on the same straight line. The pushing mechanism is fixedly installed on the first chassis, and its output end is connected to the sub-preheating box. The pushing mechanism can push the two groups of sub-preheating boxes to move in opposite directions on the first chassis. During preheating, move the pipe so that the end of the pipe extends into the preheating hole. The two groups of sub-preheating boxes move towards each other until they merge, preheat the end of the pipe, and then separate the sub-preheating boxes, and the pipe continues to move.

[0010] Further, the upper bottom of each group of sub-preheating boxes is provided with a first slider, and the first chassis is provided with a first guide rail. The first slider is slidably installed on the first guide rail. The first slider and the first guide rail cooperate with each other to ensure that the two groups of sub-preheating boxes move along the first guide rail, improving the movement stability of the sub-preheating box.

[0011] Further, the pipe feeding device includes a second chassis, a second moving component for moving the pipe, and a pipe clamping component for fixing the pipe. The second moving component is fixed on the second chassis, and the pipe clamping component is fixed on the first moving component. When the pipe feeding device works, the pipe is fixed by the pipe clamping component, the first moving component is started, and the first moving component moves the pipe clamping component towards the preheating box, and the pipe moves towards the preheating box together with the moving component.

[0012] Furthermore, the pipe clamping assembly includes a first fixing plate, two sets of clamping members, and a moving device for moving the two sets of clamping members in opposite directions. The moving device is installed on the first fixing plate, and the clamping members are slidably installed on the first fixing plate and connected to the moving device. When fixing the pipe, the two sets of clamping members move towards each other to clamp the pipe.

[0013] Furthermore, the pipe feeding device further includes a pipe supporting assembly for lifting the pipe. The pipe supporting assembly is fixedly installed on the second chassis, and multiple sets of the pipe supporting assembly are provided. The pipe is placed on each set of the pipe supporting assemblies, and the pipe supporting assemblies lift the pipe to the same height as the clamping members to ensure that the pipe clamping assembly can smoothly clamp the pipe.

[0014] Furthermore, the pipe supporting assembly includes a second fixing plate, a lifting mechanism, and a supporting member for supporting the pipe. The supporting member is connected to the second fixing plate through the lifting mechanism, and the second fixing plate is fixed on the moving device. When fixing the pipe, the pipe is placed on the supporting member, and the lifting mechanism adjusts the height of the supporting member and the pipe to move the pipe to a suitable fixing position.

[0015] Furthermore, the supporting member includes a supporting wheel and a supporting wheel fixing seat. The supporting wheel fixing seat is provided with a rotating shaft seat with a horizontal axis direction, the supporting wheel is rotatably installed on the rotating shaft seat, and the diameter of the cross-section of the supporting wheel perpendicular to its axis gradually decreases from both ends to the middle of the axis. When placing the pipe, one end of the pipe is placed in the middle of a supporting wheel, and the pipe is pushed towards the other pipe supporting assembly until the pipe is stably supported by multiple pipe supporting assemblies. The supporting wheel can reduce the resistance received when the pipe moves, making it more labor-saving to place the pipe.

[0016] Furthermore, the inlet of the injection molding device is a circular hole, and the axis of the pipe fixed by the pipe clamping assembly, the axis of the preheating hole, and the axis of the inlet of the injection molding device coincide.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] By providing a preheating box in the present utility model, the part of the pipe end that needs to be injection-molded can be completely extended into the preheating box for preheating, so that the preheating of the pipe end is uniform and sufficient, improving the injection molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the pipe joint injection molding equipment of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the preheating box of the pipe joint injection molding equipment of the present utility model;

[0021] Figure 3Schematic structural diagram of the pipe clamping assembly of the pipe joint injection molding equipment of the present utility model;

[0022] Figure 4 First schematic structural diagram of the pipe supporting assembly of the pipe joint injection molding equipment of the present utility model;

[0023] Figure 5 Second schematic structural diagram of the pipe supporting assembly of the pipe joint injection molding equipment of the present utility model;

[0024] In the attached drawings: 1. Pipe feeding device; 11. Second moving assembly; 12. Pipe clamping assembly; 121. First fixing plate; 1211. Second guide rail; 1212. Third slider; 122. Clamping member; 1221. Second slider; 123. Moving device; 1231. Second cylinder mounting plate; 1232. Second cylinder; 13. Pipe supporting assembly; 131. Second fixing plate; 1311. Fourth slider; 132. Lifting mechanism; 1321. Second motor; 1322. Lead screw; 1323. Nut; 1324. Third cylinder mounting plate; 1325. Third cylinder; 1326. Movable plate; 1327. Slide bar; 1328. Limit sleeve; 1329. Connecting column; 133. Supporting member; 1331. Supporting wheel; 1332. Supporting wheel fixing seat; 1333. Rotary shaft seat; 134. Connecting plate; 1341. Fourth guide rail; 14. Second chassis; 141. Third guide rail; 2. Preheating box; 21. Sub-preheating box; 211. Preheating hole; 2111. Sub-preheating hole; 212. First slider; 22. Heating mechanism; 23. Plugging and adjusting mechanism; 231. Limit plate; 232. Rotating disk; 233. Rotating mechanism; 234. Fan blade; 235. Temperature measuring mechanism; 24. First moving assembly; 241. First chassis; 2411. First guide rail; 242. Pushing mechanism; 3. Injection molding device; 4. Pipe. Detailed implementation manners

[0025] The present utility model will be further described below in conjunction with the detailed implementation manners. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0026] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Embodiment 1

[0028] As Figures 1 to 5 Shown in the figure is Embodiment 1 of the pipe joint injection molding equipment of the present utility model. A pipe joint injection molding equipment is provided, which includes a pipe feeding device 1 for moving the pipe 4, a preheating box 2 for preheating the pipe 4, and an injection molding device 3 for injection molding the joint. The pipe feeding device 1, the preheating box 2, and the injection molding device 3 are arranged in a straight line in sequence. A heating mechanism 22 is provided in the preheating box 2, and a preheating hole 211 for the pipe 4 to pass through is provided on the side surface of the preheating box 2 perpendicular to the movement direction of the pipe 4.

[0029] For the pipe joint injection molding equipment of the present utility model, when producing an injection molded joint, the pipe 4 is fixed on the pipe feeding device 1. The pipe feeding device 1 transports the end of the pipe 4 to the preheating box 2. The end of the pipe 4 is inserted into the preheating hole 211. The heating mechanism 22 in the preheating box 2 fully preheats the end of the pipe 4. After the preheating is completed, the pipe 4 is continuously transported to the injection molding device 3 to inject the joint at the end of the pipe 4, reducing the material and production costs, simplifying the production process, and improving the production efficiency; the part of the end of the pipe 4 that needs to be injection molded can be completely inserted into the preheating box 2 for preheating, making the end of the pipe 4 uniformly and fully preheated, reducing the stress on the pipe 4 during injection molding due to temperature differences in each part, avoiding cracks, and improving the injection molding quality.

[0030] In this embodiment, the heating mechanism 22 adopts a high-temperature ceramic infrared plate-shaped radiator; the injection molding device 3 is a screw-type injection molding machine, which has high plasticizing efficiency and small injection pressure loss.

[0031] The preheating box 2 includes a plurality of sub-preheating boxes 21 and a first moving component 24 for driving each group of sub-preheating boxes 21 to merge or separate. The sub-preheating box 21 is provided with a sub-preheating hole 2111, and each group of the sub-preheating holes 2111 surrounds to form the preheating hole 211. During preheating, the first moving component 24 drives each group of sub-preheating boxes 21 to move away from each other, moves the end of the pipe 4 between each group of sub-preheating boxes 21, then the first moving component 24 drives each group of sub-preheating boxes 21 to merge, preheats the end of the pipe 4 through the heating mechanism 22, and then separates the sub-preheating boxes 21, and the pipe 4 continues to move, so that the part that does not need to be preheated passes through the preheating pipe without being heated. As Figure 2 shown.

[0032] In addition, by separating and merging the sub-preheating boxes 21, the pipe 4 can be simply transported into the preheating hole 211, reducing the requirement for the position accuracy of the pipe 4.

[0033] There are two groups of the sub-preheating boxes 21. The first moving component 24 includes a first chassis 241 and a pushing mechanism 242. The sub-preheating box 21 is slidably connected to the first chassis 241, and the sliding directions of each group of sub-preheating boxes 21 are on the same straight line. The pushing mechanism 242 is fixedly installed on the first chassis 241, and its output end is connected to the sub-preheating box 21. The pushing mechanism 242 can push the two groups of sub-preheating boxes 21 to move in opposite directions on the first chassis 241. During preheating, the sub-preheating boxes 21 move away from each other. After the pipe 4 extends into the preheating hole 211, the two groups of sub-preheating boxes 21 move towards each other until the sub-preheating boxes 21 merge to preheat the end of the pipe 4. In this embodiment, there are two sub-preheating boxes 21.

[0034] Any pushing mechanism 242 that can realize pushing the two groups of sub-preheating boxes 21 to move in opposite directions can be applicable to the present utility model, such as an electric push rod, a cylinder, an oil cylinder, etc. The pushing mechanism 242 listed in this embodiment is not used as a limitation to the present utility model. In this embodiment, the pushing mechanism 242 is two first cylinders that are centrosymmetric. The two first cylinders are installed at the bottom of the first chassis 241 and are respectively connected to the two sub-preheating boxes 21.

[0035] A first slider 212 is provided at the bottom of each group of sub-preheating boxes 21, and a first guide rail 2411 is provided on the first chassis 241. The first slider 212 is slidably installed on the first guide rail 2411. The first slider 212 and the first guide rail 2411 cooperate with each other to ensure that the two groups of sub-preheating boxes 21 move along the first guide rail 2411, improving the stability of the movement of the sub-preheating boxes 21.

[0036] In this embodiment, a plugging and adjusting mechanism 23 is provided on two sub-preheating holes 2111 of one group of sub-preheating boxes 21. The plugging and adjusting mechanism 23 includes a limit plate 231, a rotating disk 232, a rotating mechanism 233, and a plurality of fan blades 234. The limit plate 231 is provided on the sub-preheating box 21. The plurality of fan blades 234 are circumferentially and evenly arranged on the limit plate 231. One side of each of the plurality of fan blades 234 is slidably connected to the limit plate 231, and the other side of each of the plurality of fan blades 234 is slidably connected to the rotating disk 232. The rotating mechanism 233 is provided on the sub-preheating box 21, and the rotating disk 232 is connected to the output end of the rotating mechanism 233. When the rotating disk 232 rotates, all the plurality of fan blades 234 move towards the inner or outer side of the rotating disk 232. As Figure 2 shown.

[0037] Before preheating the pipe 4, start the rotating mechanism 233 to drive the plurality of fan blades 234 to move towards the outer side of the rotating disk 232, leaving enough space for the pipe 4 to enter. Move the pipe 4 until the end of the pipe 4 passes through the rotating disk 232 and the preheating hole 211. Then start the rotating mechanism 233 to drive the rotating disk 232 to rotate in the reverse direction, so that the fan blades 234 move towards the inner side of the rotating disk 232 under the action of the limit plate 231 and the rotating disk 232, and the fan blades 234 are in contact with the outer circumference of the pipe 4. Then start the heating mechanism 22 to heat the pipe 4. The fan blades 234 in contact with the outer circumference of the pipe 4 can reduce the gap between the pipe 4 and the preheating hole 211, reduce the heat loss from the preheating hole 211, thereby improving the preheating effect on pipes 4 with different outer diameters and improving the heating efficiency. After the preheating is completed, the rotating disk 232 rotates to move the fan blades 234 towards the outer side of the rotating disk 232. The sub-preheating box 21 equipped with the plugging and adjusting mechanism 23 does not move, and the other sub-preheating box 21 moves towards the edge of the first chassis 241 to separate the two sub-preheating boxes 21. Then continue to move the pipe 4, and the part of the pipe 4 that does not need to be preheated is less heated.

[0038] Embodiment Two

[0039] This embodiment is similar to Embodiment One, except that the pipe feeding device 1 includes a second chassis 14, a second moving component 11 for moving the pipe 4, and a pipe holding component 12 for fixing the pipe 4. The second moving component 11 is fixed on the second chassis 14, and the pipe holding component 12 is connected to the second moving component 11. When the pipe feeding device 1 works, the pipe 4 is fixed by the pipe holding component 12, and the first moving component 24 is started. The first moving component 24 moves the pipe holding component 12 towards the preheating box 2, and the pipe 4 moves towards the preheating box 2 together with the moving component. As Figure 1 shown.

[0040] The pipe clamping assembly 12 includes a first fixing plate 121, two groups of clamping members 122, and a moving device 123 for moving the two groups of clamping members 122 in opposite directions. The moving device 123 is installed on the first fixing plate 121. The clamping members 122 are slidably installed on the first fixing plate 121 and are connected to the moving device 123. When fixing the pipe 4, the two groups of clamping members 122 move towards each other to clamp the pipe 4. As Figure 3 shown.

[0041] A second slider 1221 is provided on the clamping member 122, and a second guide rail 1211 is provided on the first fixing plate 121. The second slider 1221 is slidably installed on the second guide rail 1211.

[0042] There are two groups of the moving devices 123. The moving device 123 includes a second air cylinder 1232 and a second air cylinder mounting plate 1231. The second air cylinder mounting plate 1231 is vertically fixed on the first fixing plate 121. The second air cylinder 1232 is fixedly installed on the second air cylinder mounting plate 1231. The output end of the second air cylinder 1232 passes through the second air cylinder mounting plate 1231 and is fixedly connected to the clamping member 122. When the output end of the second air cylinder 1232 extends, the two groups of clamping members 122 move in a direction away from the second air cylinder mounting plate 1231, thereby realizing the relative movement of the two groups of clamping members 122.

[0043] Any moving assembly that can drive the pipe clamping assembly 12 and the pipe 4 to move to the preheating box 2 is applicable to the present invention. For example, a lead screw nut structure. The moving assembly listed in this embodiment does not limit the present invention. In this embodiment, the moving assembly is a chain drive structure, including a main sprocket, a driven sprocket, and a drive chain. The first fixing plate 121 is fixedly connected to the drive chain.

[0044] A third guide rail 141 is provided on the second chassis 14, and a third slider 1212 is provided on the first fixing plate 121. The third slider 1212 is slidably installed on the third guide rail 141. The cooperation between the third slider 1212 and the third guide rail 141 makes the second moving assembly 11 more stable when driving the pipe clamping assembly 12 to move on the second chassis 14 and prevents deviation.

[0045] The pipe feeding device 1 further includes a pipe supporting assembly 13 for supporting the pipe 4. The pipe supporting assembly 13 is fixedly installed on the second chassis 14, and there are multiple groups of the pipe supporting assembly 13. The pipe 4 is placed on each group of the pipe supporting assemblies 13, and the pipe supporting assembly 13 supports the pipe 4 to the same height as the clamping member 122 to ensure that the pipe clamping assembly 12 can smoothly clamp the pipe 4.

[0046] The inlet of the injection molding device 3 is a circular hole, and the axis of the pipe 4 fixed by the pipe holding assembly 12, the axis of the preheating hole 211, and the axis of the inlet of the injection molding device 3 coincide.

[0047] Embodiment III

[0048] This embodiment is the third embodiment of the present utility model. This embodiment is similar to Embodiment II, but the difference is that the pipe feeding device 1 further includes a pipe supporting assembly 13 for lifting the pipe 4. The pipe supporting assembly 13 is connected between the moving assembly and the pipe holding assembly 12, and multiple groups of the pipe supporting assemblies 13 are provided. The pipe 4 is placed on each group of pipe supporting assemblies 13, and the pipe supporting assembly 13 lifts the pipe 4 to the same height as the clamping member 122 to ensure that the pipe holding assembly 12 can smoothly clamp the pipe 4. As Figure 1 shown

[0049] The pipe supporting assembly 13 includes a second fixing plate 131, a lifting mechanism 132, and a supporting member 133 for supporting the pipe 4. The supporting member 133 is connected to the second fixing plate 131 through the lifting mechanism 132, and the second fixing plate 131 is fixed on the moving device 123. When fixing the pipe 4, the pipe 4 is placed on the supporting member 133, and the lifting mechanism 132 adjusts the height of the supporting member 133 and the pipe 4 to move the pipe 4 to a suitable fixing position. As Figure 4 and Figure 5 shown.

[0050] The lifting mechanism 132 includes a first lifting assembly, a second lifting assembly, and a connecting plate 134. The connecting plate 134 is provided with a fourth guide rail 1341, and the second fixing plate 131 is provided with a fourth slider 1311. The fourth slider 1311 is slidably installed in the fourth guide rail 1341. The first lifting assembly is connected between the second fixing plate 131 and the connecting plate 134, and the second lifting assembly is connected between the connecting plate 134 and the supporting member 133. The pipe 4 is placed on the supporting member 133, the first lifting assembly lifts the pipe 4 to a height close to the pipe holding assembly 12, the second lifting assembly is started to adjust the height of the supporting member 133 and the pipe 4 to make the pipe 4 reach a suitable fixing position. After the pipe holding assembly 12 fixes the pipe 4, the second lifting assembly falls back to separate the supporting member 133 from the pipe 4.

[0051] The first lifting assembly includes a second motor 1321, a lead screw 1322, and a nut 1323. The second motor 1321 is installed on the second fixing plate 131. The connecting plate 134 is provided with vertically arranged bearing fixing seats and bearing support seats. The lead screw 1322 is rotatably connected between the bearing fixing seat and the bearing support seat. The output end of the second motor 1321 is fixedly connected to the end of the lead screw 1322. The nut 1323 is fixed on the second fixing plate 131, and the internal thread of the nut 1323 is engaged with the external thread of the lead screw 1322. When controlling the lifting of the pipe 4, the three groups of second motors 1321 are controlled to start, synchronously driving the lead screw 1322 to rotate. Since the position of the lead screw 1322 is restricted between the bearing fixing seat and the bearing support seat, and the nut 1323 is fixed on the second fixing plate 131, the lead screw 1322 moves axially under the action of the thread, driving the connecting plate 134 to move up and down, and moving the pipe 4 to a suitable position. The second motor 1321 is a servo motor. As Figure 4 shown.

[0052] The second lifting assembly includes a third cylinder mounting plate 1324, a third cylinder 1325, two groups of slide rods 1327, two groups of limit sleeves 1328, and a movable plate 1326. The third cylinder mounting plate 1324 is fixed on the connecting plate 134. The third cylinder 1325 is fixedly installed on the third cylinder mounting plate 1324. The support member 133 is installed on the top of the movable plate 1326. A connecting column 1329 is fixed to the bottom of the movable plate 1326, and the movable plate 1326 is fixedly connected to the output end of the third cylinder 1325 through the connecting column 1329. The slide rods 1327 are fixedly connected to the bottom of the movable plate 1326. The limit sleeves 1328 are fixed on the third cylinder mounting plate 1324. The two groups of limit sleeves 1328 are symmetrically distributed on both sides of the third cylinder 1325. The slide rods 1327 extend into the limit sleeves 1328, and the limit sleeves 1328 can limit the horizontal position of the slide rods 1327, thereby limiting the horizontal position of the movable plate 1326 and making the lifting of the movable plate 1326 and the support member 133 more stable. As Figure 5 shown.

[0053] By providing two lifting assemblies, the requirement for the maximum stroke of each lifting assembly can be reduced.

[0054] The support member 133 includes a supporting roller 1331 and a supporting roller fixing seat 1332. A rotating shaft seat 1333 with a horizontal axis direction is provided on the supporting roller fixing seat 1332. The supporting roller 1331 is rotatably installed on the rotating shaft seat 1333. The diameter of the cross-section of the supporting roller 1331 perpendicular to its axis gradually decreases from both ends to the middle of the axis. When placing the pipe 4, one end of the pipe 4 is placed in the middle of a supporting roller 1331, and the pipe 4 is pushed towards the other pipe supporting component 13 until the pipe 4 is stably supported by a plurality of pipe supporting components 13. The supporting roller 1331 can reduce the resistance received when the pipe 4 moves, making it more labor-saving to place the pipe 4.

[0055] In the specific content of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not exist in contradiction, they should be considered as the scope recorded in this specification.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A pipe joint injection molding device, characterized in that: The invention comprises a pipe conveying device (1) for moving a pipe (4), a preheating box (2) for preheating the pipe (4) and an injection molding device (3) for forming a joint by injection molding. The pipe conveying device (1), the preheating box (2) and the injection molding device (3) are sequentially arranged in a straight line. A heating mechanism (22) is provided in the preheating box (2). A preheating hole (211) for allowing the pipe (4) to pass through is provided on the side surface of the preheating box (2) perpendicular to the moving direction of the pipe (4).

2. The pipe joint injection molding equipment according to claim 1, characterized in that: The preheating box (2) comprises a plurality of sub-preheating boxes (21) and a first moving assembly (24) for driving each group of sub-preheating boxes (21) to merge or separate. The sub-preheating boxes (21) are provided with sub-preheating holes (2111), and each group of sub-preheating holes (2111) surrounds the preheating hole (211).

3. The pipe joint injection molding equipment according to claim 2, characterized in that: The sub-preheating boxes (21) have two groups, the first moving assembly (24) comprises a first base frame (241) and a pushing mechanism (242), the sub-preheating boxes (21) are slidably connected to the first base frame (241), and the sliding directions of each group of sub-preheating boxes (21) are on the same straight line, the pushing mechanism (242) is fixedly mounted on the first base frame (241), and its output end is connected to the sub-preheating boxes (21).

4. The pipe joint injection molding equipment according to claim 3, characterized in that: A first sliding block (212) is provided at the bottom of each group of sub-preheating boxes (21), a first guide rail (2411) is provided on the first base frame (241), and the first sliding block (212) is slidably mounted on the first guide rail (2411).

5. The pipe joint injection molding equipment according to claim 2, characterized in that: The pipe delivery device (1) comprises a second base frame (14), a second moving assembly (11) for moving a pipe (4), and a pipe holding assembly (12) for fixing the pipe (4), wherein the second moving assembly (11) is fixed on the second base frame (14), and the pipe holding assembly (12) is fixed on the first moving assembly (24).

6. The pipe joint injection molding equipment according to claim 5, characterized in that: The pipe holding assembly (12) comprises a first fixed plate (121), two groups of clamping members (122) and a moving device (123) for moving the two groups of clamping members (122) in opposite directions; the moving device (123) is mounted on the first fixed plate (121); the clamping members (122) are slidably mounted on the first fixed plate (121) and are connected to the moving device (123).

7. The pipe joint injection molding equipment according to claim 6, characterized in that: The pipe delivery device (1) further comprises a supporting assembly (13) for supporting the pipe (4); the supporting assembly (13) is fixedly mounted on the second base frame (14); and a plurality of supporting assemblies (13) are provided.

8. The pipe joint injection molding equipment according to claim 7, characterized in that: The hosting assembly (13) comprises a second fixed plate (131), a lifting mechanism (132) and a support member (133) for supporting the pipe (4); the support member (133) is connected to the second fixed plate (131) via the lifting mechanism (132); and the second fixed plate (131) is fixed on the moving device (123).

9. The pipe joint injection molding equipment according to claim 8, characterized in that: The support member (133) comprises a supporting wheel (1331) and a supporting wheel fixing seat (1332); the supporting wheel fixing seat (1332) is provided with a rotating shaft seat (1333) with an axis horizontal therein; the supporting wheel (1331) is rotatably mounted on the rotating shaft seat (1333); and the diameter of a cross section of the supporting wheel (1331) perpendicular to its axis gradually decreases from both ends to the middle of the axis.

10. The pipe joint injection molding equipment according to claim 5, characterized in that: The inlet of the injection molding device (3) is a circular hole, and the axis of the pipe (4) fixed by the pipe holding assembly (12), the axis of the preheating hole (211) and the inlet axis of the injection molding device (3) coincide with each other.

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