Injection molding device for fluid pipeline production

Abstract

The invention provides an injection molding device for fluid pipeline production, the injection molding device comprises an injection molding unit, a sealing assembly, a feeding unit and a control unit, the injection molding unit comprises a rack, an inner mold and an outer mold, the outer mold is arranged at one end of the rack, the inner mold is slidably arranged on the rack in the extending direction of a to-be-machined pipeline, and the sealing assembly is arranged on the inner mold; the outer mold and the inner mold are coaxially arranged, the inner diameter of the outer mold is equal to the outer diameter of a to-be-machined pipeline, the outer diameter of the inner mold is equal to the inner diameter of the to-be-machined pipeline, and the to-be-machined pipeline is arranged between the outer mold and the inner mold in a sleeving mode; the sealing assembly is used for fastening the outer mold on the peripheral wall of a to-be-processed pipeline, an injection port is formed in the inner mold, the feeding unit performs injection molding on the to-be-processed pipeline through the injection port, and the control unit controls the movement of the inner mold.

Description

Technical Field

[0001] The invention relates to the technical field of pipelines, in particular to an injection molding device for producing fluid pipelines. Background Art

[0002] During the production process of fluid pipelines, a socket is injection molded at the end of the pipeline. By injection molding sockets of different diameters at the ends of different pipelines and connecting the large and small sockets, the pipelines can be connected. For example, a Chinese patent document with authorization announcement number CN104329528B discloses a plastic pipeline connector and a production device thereof. The device uses an upper mold and a lower mold to mold a joint between an inner tube and an outer tube during injection molding. However, multi-mold molding will inevitably produce a mold line. The mold line is when excess plastic flows out of the mold joint or the material flows into the gap between the mold parts and produces flash on the plastic part. Since the pipeline connection is to insert the small socket of the pipeline into the large socket, and the mold line will be produced on the socket that needs to ensure a certain degree of sealing, the mold line produced on the small socket will affect the plug-in effect and sealing between the pipelines.

[0003] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] In view of the deficiencies in the prior art, an injection molding device for producing fluid pipelines is provided, which can avoid the formation of a parting line in the sealing working section of the pipeline socket, reduce the inconvenience caused by the parting line when plugging the pipeline and the impact on the plug-in sealing.

[0005] The above purpose is achieved through the following technical solutions: An injection molding device for producing a fluid pipeline comprises an injection molding unit, wherein the injection molding unit comprises a frame, an outer mold and an inner mold, wherein the outer mold is arranged at one end of the frame, the inner mold is slidably arranged on the frame and is slidably arranged relative to the outer mold along the axial direction of the outer mold, the inner diameter of the outer mold is equal to the outer diameter of the pipeline to be processed, and the outer diameter of the inner mold is equal to the inner diameter of the pipeline to be processed; the pipeline to be processed is sleeved between the outer mold and the inner mold, and the cavity surrounded by the outer mold and the inner mold is a feeding cavity; A sealing assembly, the sealing assembly being used to clamp one end of the feed chamber; A feeding unit, the feeding unit is used to inject materials into the feeding cavity; A control unit, wherein the control unit controls the movement of the inner mold; The inner mold and the outer mold seal the inner edge of the pipe to be processed in the circumferential direction, and the mold closing direction and the mold opening direction are the axial direction of the pipe to be processed.

[0006] Optionally, a plurality of elastic petals are evenly distributed along the circumference of one end of the outer mold away from the inner mold, and the original state of the plurality of elastic petals is outward expansion. The sealing assembly can clamp the plurality of elastic petals to make them gather inward, thereby clamping one end of the feed cavity.

[0007] Optionally, the sealing assembly includes a base, at least two rockers and at least two clamps, the base is slidably arranged on the frame in a vertical direction, the middle part of the rocker is hinged to the frame, one end of the rocker is respectively slidably connected to the two ends of the base, the clamps are respectively hinged to the other end of the rocker connected to the base, the rocker and the clamps correspond one to one; the clamps are semicircular rings, and the clamps are adapted to the outer mold.

[0008] Optionally, a retaining ring is provided on the outer mold, and the retaining ring is provided at one end of the outer mold close to the inner mold. The outer diameter of the retaining ring is the same as the outer diameter of the outer mold, and the inner diameter of the retaining ring is the same as the outer diameter of the inner mold.

[0009] Optionally, the injection molding device for producing fluid pipelines further comprises a support assembly and an air bag, wherein the support assembly comprises an air pump and a support ring frame, wherein the support ring frame is hollow and is slidably arranged on the frame along the axis direction of the outer mold, and an air bag is arranged at one end of the support ring frame close to the outer mold, and the other end is connected to the working end of the air pump; A vent hole is arranged on the peripheral surface of the support ring frame corresponding to the airbag, and the middle part of the support ring frame is connected to the airbag.

[0010] Optionally, the injection molding device for producing fluid pipelines further includes a pipeline conveying unit, which includes a base, a sliding frame and a plurality of rollers, wherein the sliding frame is slidably disposed on the base, and the plurality of rollers are disposed on the sliding frame.

[0011] Optionally, the control unit includes a plurality of hydraulic rods, and the plurality of hydraulic rods are connected to the inner mold.

[0012] Optionally, the injection molding device for producing fluid pipelines further includes a numerical control system for controlling the movement of the plurality of hydraulic rods.

[0013] Optionally, an end of the inner mold close to the outer mold is provided with a reverse mold slope.

[0014] Optionally, the feeding unit includes a barrel, a screw, a nozzle and a hopper.

[0015] The beneficial effects of the present invention are: The present invention provides an outer mold and an inner mold, and the inner mold can move toward or away from the outer mold along the extension direction of the pipeline. The pipeline to be processed is sleeved between the outer mold and the inner mold for injection molding, and a sealed feed cavity can be formed. The molten material is injected into the feed cavity for injection molding. The inner mold and the outer mold seal the inner edge of the pipeline to be processed in a circumferential direction, and the mold closing direction and the mold opening direction are the axial direction of the pipeline to be processed, so as to avoid the generation of a mold line where multiple molds are joined, and to avoid the mold line appearing at the socket where the sealing performance needs to be ensured, thereby reducing the influence of the mold line on the sealing performance of the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an injection molding device for producing a fluid pipeline according to the present invention; Figure 2 for Figure 1 Exploded diagram of the pipeline and injection unit; Figure 3 It is a front view of an injection molding device for producing a fluid pipeline according to the present invention; Figure 4 for Figure 3 Sectional view at AA in the middle; Figure 5 for Figure 4 The enlarged schematic diagram of point a in the middle; Figure 6 It is a front view of an injection molding device for producing fluid pipelines according to the present invention (in a clamping state, with the frame omitted); Figure 7 for Figure 6 Sectional view at the middle BB (state); Figure 8 for Figure 7 The enlarged schematic diagram of point b in the middle; Fig. 9 for Figure 7 The enlarged schematic diagram of point b in the middle (inner mold is out of the state).

[0017] in: 100, injection unit; 110, outer mold; 120, inner mold; 130, frame; 140, feed cavity; 111, elastic flap; 112, retaining ring; 121, injection port; 200, sealing assembly; 210, base; 220, rocker; 230, clamp; 240, hydraulic push rod; 300, feeding unit; 400. control unit; 500, support assembly; 510, air pump; 520, support ring frame; 530, air bag; 600, pipeline conveying unit; 610, base; 620, sliding frame; 630, roller; 1000. Pipelines to be processed. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation to the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] like Figures 1 to 9 As shown, an injection molding device for producing a fluid pipeline of the present invention comprises an injection molding unit 100, a sealing assembly 200, a feeding unit 300 and a control unit 400, and is used for injection molding production of a pipe socket. The injection molding unit 100 comprises a frame 130, an inner mold 120 and an outer mold 110, the extension direction of the frame 130 is a horizontal direction, the axis direction of the pipe 1000 to be processed is also a horizontal direction, and the pipe 1000 to be processed moves along its own axis direction for processing.

[0022] An outer mold 110 is provided at one end of the frame 130, and a movable mold seat is slidably provided on the frame 130 along the axial direction of the outer mold 110. The inner mold 120 is provided on a side of the movable mold seat close to the outer mold 110, and the inner mold 120 is slidably provided on the frame 130 along the axial direction of the outer mold 110; the outer mold 110 and the pipe 1000 to be processed are arranged coaxially, and the outer mold 110 and the inner mold 120 are arranged coaxially, the inner diameter of the outer mold 110 is equal to the outer diameter of the pipe 1000 to be processed, and the outer diameter of the inner mold 120 is equal to the inner diameter of the pipe 1000 to be processed, and the pipe 1000 to be processed is sleeved between the outer mold 110 and the inner mold 120, and the cavity surrounded by the outer mold 110, the pipe 1000 to be processed, the inner mold 120 and the movable mold seat is the feed cavity 140, refer to Figure 5 , the material is injected into the feed cavity 140, and the bell-and-socket of the pipe 1000 to be processed is injection molded, and the shape of the feed cavity 140 is the shape of the newly processed bell-and-socket. The present invention adopts an injection molding method in which the pipe 1000 to be processed is set between the outer mold 110 and the inner mold 120, so as to avoid processing a parting line at the bell-and-socket, and reduce the influence of the parting line on the sealing performance of the bell-and-socket.

[0023] The sealing assembly 200 has a loose state and a clamped state. In the loose state, the pipe 1000 to be processed can slide relatively between the outer mold 110 and the inner mold 120. In the clamped state, the outer mold 110 can be clamped to the outer peripheral wall of the pipe 1000 to be processed, fix the outer mold 110 and the pipe 1000 to be processed and seal the gap between the outer mold 110 and the pipe 1000 to be processed to prevent the injected material from leaking out; the inner mold 120 is provided with a nozzle 121 connected to the feed cavity 140, and the material of the feed unit 300 is injected into the feed cavity 140 through the nozzle 121 for injection molding; the control unit 400 includes a plurality of hydraulic rods and a numerical control system, and the hydraulic rods are connected to the movable mold base to control the movement and stop of the inner mold 120.

[0024] It should be supplemented that an end of the inner mold 120 close to the outer mold 110 is provided with a reverse mold slope to facilitate demoulding of the workpiece after injection molding.

[0025] It should also be added that the feeding unit 300 includes a barrel, a screw, a nozzle and a hopper. When the screw rotates in the barrel, the material falling into the hopper is drawn into the barrel, and is gradually pushed forward and ejected through the nozzle.

[0026] When processing the socket of the fluid pipeline, the initial state of the sealing assembly 200 is the loose state, the movable mold seat is in contact with the outer mold 110, and the hydraulic rod presses the movable mold seat on the outer mold 110, the inner mold 120 is located in the middle of the outer mold 110, and the pipeline 1000 to be processed is moved to move close to the outer mold 110 along its own axis until it is sleeved between the outer mold 110 and the inner mold 120, and the pipeline 1000 to be processed is stopped after it is located at the expected injection position. At this time, the feed cavity 140 is formed, so that the sealing The sealing component 200 changes from a loose state to a clamped state, and the feed unit 300 is controlled to inject the molten material into the feed cavity 140 through the injection port 121. After the feed cavity 140 is filled with the molten material, it is pressure-maintained and cooled. The newly processed pipe socket is processed and can be demolded. The inner mold 120 is moved away from the outer mold 110 to separate the inner mold 120 from the processed pipe, and the sealing component 200 is changed from a clamped state to a loose state. The processed pipe can be taken out, and the pipe socket injection molding is completed.

[0027] In a further embodiment, a plurality of elastic petals 111 are evenly distributed along the circumferential direction at one end of the outer mold 110 away from the inner mold 120. The elastic petals 111 are elastic, and the original state of the plurality of elastic petals 111 is outward expansion, so as to make it easier for the port of the pipe 1000 to be processed to enter the outer mold 110, thereby reducing the influence of the error of the pipe alignment with the outer mold 110; the sealing assembly 200 can clamp the plurality of elastic petals 111 to make them gather inward, thereby clamping one end of the feed cavity 140.

[0028] In a further embodiment, the sealing assembly 200 includes a base 210, at least two rocking arms 220, at least two clamps 230 and a hydraulic push rod 240. The base 210 is arranged on the frame 130. The hydraulic push rod 240 can push the base 210 to slide in the vertical direction. The middle part of the rocking arm 220 is hinged to the frame 130. One end of the rocking arm 220 is slidably connected to the two ends of the base 210 respectively. The clamps 230 are hinged to the other end of the rocking arm 220 connected to the base 210 respectively. The rocking arm 220 corresponds to the clamps 230 one by one. The clamps 230 are half a circle. The diameter of the circle of the clamps 230 is equal to the diameter of the outer mold 110. The openings of the two clamps 230 are arranged opposite to each other and are sleeved on the outside of the outer mold 110. The clamps 230 are adapted to the outer mold 110.

[0029] The hydraulic push rod 240 can make the base 210 move in the vertical direction, and the base 210 drives the rocker 220 to slide and rotate, so that the two clamps 230 clamp the outer mold 110 or release the outer mold 110. When the pipe 1000 to be processed is not in the expected injection position between the outer mold 110 and the inner mold 120, the clamps 230 release the outer mold 110. Figure 3, so that the pipe 1000 to be processed can enter. When the pipe 1000 to be processed is in the expected injection position, the hydraulic push rod 240 lifts the base 210, so that the rocker 220 rotates clockwise, and the two clamps 230 move closer to each other to clamp the outer mold 110, so that the feed cavity 140 is sealed in the circumferential direction. Figure 6 .

[0030] In a further embodiment, reference Figure 5 The outer mold 110 is provided with a retaining ring 112, which is arranged at one end of the outer mold 110 close to the inner mold 120. The outer diameter of the retaining ring 112 is the same as the outer diameter of the outer mold 110, and the inner diameter is the same as the outer diameter of the inner mold 120. The outer mold 110, the inner mold 120 and the pipe 1000 to be processed are surrounded to form a feed cavity 140. When the pipe socket injection molding is performed, the pipe 1000 to be processed is sleeved between the outer mold 110 and the inner mold 120, and the feeding unit 300 is fed from the injection port 121. During injection molding, the material fills the feed cavity 140 and adheres to the pipe 1000 to be processed. After cooling and injection molding, the inner mold 120 is moved away from the outer mold 110 for demoulding. At this time, the retaining ring 112 resists the port of the processed socket, giving the socket a supporting force along the direction from the inner mold 120 to the outer mold 110, so that the joint between the newly processed socket and the original pipe will not be damaged by the friction force of the inner mold 120 being disengaged, thereby ensuring the connection quality between the newly processed socket and the original pipe.

[0031] In a further embodiment, the injection molding device for producing a fluid pipeline of the present invention further includes a support assembly 500, which includes an air pump 510 and a support ring frame 520. The support ring frame 520 is hollow and is slidably arranged on the frame 130 along the extension direction of the pipeline 1000 to be processed. An annular airbag 530 is arranged at one end of the support ring frame 520 close to the outer mold 110. A vent hole is arranged on the circumferential surface of this end corresponding to the airbag 530, and the airbag 530 can expand. The other end of the support ring frame 520 is connected to the working end of the air pump 510. When the air pump 510 is working, air is inflated into the support ring frame 520 or air is drawn from the support ring frame 520. Air is sucked into the frame 520, and when inflated, the gas enters the airbag 530 through the air vent, so that the airbag 530 expands, contacts with and supports the inner wall of the pipe 1000 to be processed, and reduces the deformation of the pipe. When air is sucked, the airbag 530 shrinks to the initial state; and when demolding, the airbag 530, the pipe and the inner mold 120 form a sealed space. When the inner mold 120 moves away from the outer mold 110, the volume of this sealed space increases due to the detachment of the inner mold 120, so that the air pressure in the sealed space is reduced, so that the wall of the pipe to be demolded is attracted inward and deformed, so that a gap is generated between the outer wall of the pipe and the outer mold 110, which makes demolding easier.

[0032] In a further embodiment, the injection molding device for producing fluid pipelines of the present invention also includes a pipeline conveying unit 600, which includes a base 610, a sliding frame 620 and a plurality of rollers 630. The sliding frame 620 is slidably set on the base 610, and the plurality of rollers 630 are set on the sliding frame 620 for supporting and moving the pipeline 1000 to be processed.

[0033] In combination with the above embodiments, the use principle and working process of the present invention are as follows: When processing the socket of the fluid pipeline, the initial state of the clamp 230 is the loose state, the movable mold seat is pressed on the outer mold 110, the inner mold 120 is located in the middle of the outer mold 110, the elastic petal 111 is in the original state, and the airbag 530 is contracted; The pipe 1000 to be processed is moved so that it moves along its own axis direction close to the outer mold 110 until it is sleeved between the outer mold 110 and the inner mold 120, and the pipe 1000 to be processed is stopped after it is located at the expected injection molding position. At this time, the feed cavity 140 is formed. Figure 5 , control the hydraulic push rod 240 to lift, the hydraulic push rod 240 lifts the base 210, the rocker 220 rotates clockwise, the two clamps 230 move close to each other to clamp the outer mold 110, control the support ring frame 520 to make one end of the airbag 530 extend into the middle of the pipe 1000 to be processed through the inner mold 120, turn on the air pump 510 to inflate the middle of the support ring frame 520, so that the airbag 530 is inflated and expands and reaches the inner wall of the pipe 1000 to be processed, control the feeding unit 300 to approach the inner mold 120, and pass the molten material through The injection port 121 injects molten material into the feed cavity 140 so that the feed cavity 140 is filled with molten material. The material adheres to the pipe 1000 to be processed. After cooling under pressure for a period of time, the inner mold 120 moves away from the outer mold 110 to separate the inner mold 120 from the processed pipe. The retaining ring 112 resists the port of the processed socket, and the inner mold 120 is separated from the processed pipe. The air pump 510 inhales air, and the airbag 530 contracts. The hydraulic push rod 240 is controlled to descend to the initial position, and the clamp 230 is released to remove the processed pipe.

[0034] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An injection molding device for producing fluid pipelines, characterized in that: include: An injection molding unit, the injection molding unit comprising a frame, an outer mold and an inner mold, the outer mold being arranged at one end of the frame, the inner mold being slidably arranged on the frame and being slidably arranged relative to the outer mold along the axial direction of the outer mold, the inner diameter of the outer mold being equal to the outer diameter of the pipe to be processed, and the outer diameter of the inner mold being equal to the inner diameter of the pipe to be processed; the pipe to be processed is sleeved between the outer mold and the inner mold, and the cavity surrounded by the outer mold and the inner mold is a feed cavity; A sealing assembly, the sealing assembly being used to clamp one end of the feed chamber; A feeding unit, the feeding unit is used to inject materials into the feeding cavity; A control unit, wherein the control unit controls the movement of the inner mold; The inner mold and the outer mold seal the inner edge of the pipe to be processed in the circumferential direction, and the mold closing direction and the mold opening direction are the axial direction of the pipe to be processed.

2. The injection molding device for producing fluid pipelines according to claim 1, characterized in that: The end of the outer mold away from the inner mold is evenly distributed along the circumference with multiple elastic petals, and the original state of the multiple elastic petals is outward expansion. The sealing assembly can clamp the multiple elastic petals to make them gather inward, clamping one end of the feed cavity.

3. The injection molding device for producing fluid pipelines according to claim 2, characterized in that: The sealing assembly includes a base, at least two rockers and at least two clamps. The base is slidably arranged on the frame along the vertical direction. The middle part of the rocker is hinged to the frame. One end of the rocker is slidably connected to the two ends of the base respectively. The clamps are hinged to the other end of the rocker connected to the base respectively. The rocker corresponds to the clamps one by one. The clamps are semicircular rings and are adapted to the outer mold.

4. The injection molding device for producing a fluid pipeline according to claim 1, characterized in that: The outer mold is provided with a retaining ring, which is arranged at one end of the outer mold close to the inner mold. The outer diameter of the retaining ring is the same as the outer diameter of the outer mold, and the inner diameter is the same as the outer diameter of the inner mold.

5. The injection molding device for producing fluid pipelines according to claim 4, characterized in that: The injection molding device for producing fluid pipelines also includes a support assembly and an air bag, the support assembly includes an air pump and a support ring frame, the support ring frame is hollow and is slidably arranged on the frame along the axis direction of the outer mold, and the air bag is arranged at one end of the support ring frame close to the outer mold, and the other end is connected to the working end of the air pump; A vent hole is arranged on the peripheral surface of the support ring frame corresponding to the airbag, and the middle part of the support ring frame is connected to the airbag.

6. The injection molding device for producing a fluid pipeline according to claim 1, characterized in that: The injection molding device for producing fluid pipelines also includes a pipeline conveying unit, which includes a base, a sliding frame and a plurality of rollers. The sliding frame is slidably arranged on the base, and the plurality of rollers are arranged on the sliding frame.

7. The injection molding device for producing a fluid pipeline according to claim 1, characterized in that: The control unit includes a plurality of hydraulic rods, and the plurality of hydraulic rods are connected to the inner mold.

8. The injection molding device for producing a fluid pipeline according to claim 7, characterized in that: The injection molding device for producing fluid pipelines also includes a numerical control system for controlling the movement of the plurality of hydraulic rods.

9. The injection molding device for producing a fluid pipeline according to claim 1, characterized in that: An end of the inner mold close to the outer mold is provided with a reverse mold slope.

10. The injection molding device for producing a fluid pipeline according to claim 1, characterized in that: The feeding unit comprises a barrel, a screw, a nozzle and a hopper.

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