Forming pipe die for producing fiber winding pipe

Abstract

The utility model discloses a forming pipe die for fiber winding pipe production, and belongs to the technical field of fiber winding pipe production equipment. The glue injection device mainly comprises a hollow pipe fitting and two glue injection assemblies located at the two ends of the hollow pipe fitting. The hollow pipe fitting comprises a pipe main body and two mounting end covers; the glue injection assembly comprises a glue injection pipe and a flange end cover; a glue flowing channel penetrates through the interior of the glue injection pipe in the axis direction, the flange end cover is fixedly connected with the mounting end cover, and a limiting piece is fixedly arranged on the inner wall of the flange end cover; the hollow space is used for containing a core rod wound with fiber materials, and the two ends of the core rod are limited by two limiting pieces. By means of the simple and ingenious structural design, material waste is effectively reduced, production cost is reduced, turnover is convenient, workshop production efficiency is greatly improved, practicability is very high, and positive significance is achieved in the field of fiber winding pipe production.

Description

Technical Field

[0001] The utility model belongs to the technical field of fiber winding pipe production equipment. Specifically, it particularly relates to a forming pipe mold for fiber winding pipe production, which has a simple and ingenious structure design, changes the conventional production mode of fiber winding pipes, has no resin glue dripping phenomenon, is convenient for turnover, and greatly improves the environmental hygiene and production efficiency of the workshop. Background Art

[0002] The current production processes of fiber winding pipes mainly include core mold treatment, pre-impregnation process, winding process, curing process, demolding process, post-treatment process, etc.

[0003] Among them, core mold treatment refers to cleaning the core mold (usually made of metal material) and applying a release agent so that the fiber pipe can be easily demolded after curing; the surface of the core mold is required to be smooth and defect-free. The pre-impregnation process refers to pre-impregnating the fiber material in resin glue. The pre-impregnation process is to make the fiber material fully impregnated with resin to ensure the integrity of the final product in terms of structure and performance. The winding process refers to using a fiber winding machine to wind the pre-impregnated fiber material around the mandrel; the machine controls the rotation of the core mold and the supply of the fiber, and winds the pre-impregnated fiber evenly around the core mold according to a preset pattern. The curing process refers to curing the resin by heating or other means after winding. The demolding process refers to demolding the fiber winding pipe from the core mold after the resin is completely cured. Finally, the post-treatment process is carried out. The post-treatment process refers to that the demolded fiber pipe needs to be machined to remove the excess edges to achieve precise dimensions and a smooth surface.

[0004] It can be seen from the production processes of traditional fiber winding pipes that:

[0005] 1. In the traditional process, the fiber material must be pre-impregnated first and then wound. This leads to the need for strict control of the ratio of resin glue in the traditional production method. If the ratio is too thin, there will be problems of glue dripping during the subsequent winding process, wasting glue and polluting the workshop; if the ratio is too thick, there will be problems that the fiber material is not thoroughly soaked in glue, seriously affecting the product quality.

[0006] 2. The traditional production method results in uneven thickness of the glue on the surface of the fiber material on the mandrel, the surface of the fiber pipe is rough after forming, and a large amount of machining is required after demolding, which increases the labor intensity and production cost and reduces the production efficiency. Content of the Utility Model

[0007] The purpose of the utility model is to address the deficiencies existing in the prior art, and provides a forming pipe mold for fiber winding pipe production, which has a simple and ingenious structure design, changes the conventional production mode of fiber winding pipes, has no resin glue dripping phenomenon, is convenient for turnover, and greatly improves the environmental hygiene and production efficiency of the workshop.

[0008] The present utility model is achieved through the following technical solutions:

[0009] A forming pipe mold for the production of fiber-wound pipes, comprising a hollow pipe fitting and two glue injection assemblies located at both ends of the hollow pipe fitting;

[0010] The hollow pipe fitting includes a pipe body and two mounting end caps respectively arranged at both ends of the pipe body;

[0011] The glue injection assembly includes a glue injection pipe and a flange end cap fixedly connected to the glue injection pipe; a glue flow channel is axially penetrated through the inside of the glue injection pipe, one end of the glue flow channel is communicated with a glue head guiding conical opening opened at the pipe head position of the glue injection pipe, and the other end is communicated with a glue communication port axially penetrating through the flange end cap; the flange end cap is fixedly connected to the mounting end cap, and a limiting member accommodated in the hollow space of the hollow pipe fitting is fixedly arranged on the inner wall of the flange end cap; the hollow space is used to accommodate a mandrel wound with a fiber material, and both ends of the mandrel are limited by the two limiting members.

[0012] Preferably, the limiting member includes four arc-shaped limiting blocks regularly distributed at intervals in the circumferential direction, the outer contour track formed by the four arc-shaped limiting blocks is circular, and the outer side walls of the four arc-shaped limiting blocks are in clearance fit with the inner wall of the hollow pipe fitting.

[0013] Preferably, a glue pipe installation groove communicated with the glue communication port and concentric with the glue communication port is opened on the flange end cap; the end of the glue injection pipe is in interference fit with the glue pipe installation groove.

[0014] Preferably, a conical seal is fixedly installed on the inner wall of the glue head guiding conical opening.

[0015] Preferably, a sealing structure is provided between the flange end cap and the mounting end cap.

[0016] Preferably, the sealing structure includes an annular groove opened on the mounting end cap, and a sealing ring is embedded in the annular groove.

[0017] Preferably, the mounting end cap and the flange end cap are fixedly integrated by bolt fasteners.

[0018] Preferably, the pipe body and the mounting end cap are of an integral structure.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] 1. Through a simple and ingenious structural design, the present utility model changes the traditional production mode of fiber-wound pipes. There is no phenomenon of resin glue dripping, effectively reducing material waste, lowering production costs, and effectively improving the cleanliness of the workshop, meeting the concepts of green production and sustainable development;

[0021] 2. The turnover of the utility model is convenient. By curing the glue at both ends first, it is ensured that the semi-finished product does not leak glue, so that the semi-finished products can be centrally processed, effectively simplifying the process and reducing the production cost;

[0022] 3. The surface of the fiber-wound pipe formed by the utility model is smooth, and the labor intensity of the subsequent processing operations after demolding is very low, further simplifying the production process and reducing the production cost;

[0023] 4. The utility model greatly improves the production efficiency of the workshop, has very strong practicability, and has positive significance in the field of fiber-wound pipe production. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the utility model in the three-dimensional direction.

[0025] Figure 2 It is a schematic structural diagram when the hollow pipe fitting and the glue injection assembly of the utility model are separated in the front direction.

[0026] Figure 3 It is a schematic sectional structural diagram of the utility model.

[0027] Figure 4 It is the utility model Figure 3 The enlarged view at A in it.

[0028] Figure 5 It is a schematic structural diagram of the glue injection assembly of the utility model.

[0029] In the figure: 1. Hollow pipe fitting; 11. Installation end cover; 111. Sealing ring; 12. Pipe body; 13. Hollow space; 14. Mandrel; 2. Glue injection assembly; 21. Glue injection pipe; 211. Glue head guiding taper; 212. Glue flow channel; 22. Flange end cover; 221. Glue connection port; 222. Limiting member; 2221. Arc-shaped limiting block; 223. Glue pipe installation groove; 224. Conical seal. Detailed Embodiment

[0030] In order to enable readers to better understand the design concept of the utility model, the technical solutions described in the utility model will be further described and illustrated below in conjunction with embodiments. It should be noted that the orientation terms that may be involved in the following paragraphs, including but not limited to "upper, lower, left, right, front, rear", etc., are based on the visual orientation shown in the corresponding specification drawings, and they should not and should not be regarded as limiting the protection scope or technical solution of the utility model. Their purpose is only to facilitate those skilled in the art to better understand the technical solutions described in the utility model.

[0031] In the description of this specification, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] As Figures 1 to 4 shown, this embodiment provides a forming tube mold for fiber winding pipe production, which includes a hollow pipe fitting 1 and two glue injection assemblies 2 located at both ends of the hollow pipe fitting 1; the glue injection assemblies 2 are fixedly connected to the hollow pipe fitting 1 in a detachable connection manner, such as by using a bolt fastener connection method. The hollow pipe fitting 1 includes a pipe body 12 and two mounting end caps 11 respectively arranged at both ends of the pipe body 12; the mounting end caps 11 and the pipe body 12 are of an integral structure. The glue injection assembly 2 includes a glue injection pipe 21 and a flange end cap 22 fixedly connected to the glue injection pipe 21; a glue flow channel 212 is axially provided through the inside of the glue injection pipe 21, one end of the glue flow channel 212 is connected to a glue head guiding cone 211 opened at the pipe head position of the glue injection pipe 21, and the other end is connected to a glue communication port 221 axially penetrating the flange end cap 22. The glue communication port 221 is in communication with the hollow space 13. The resin glue is injected from the glue head guiding cone 211, and enters the hollow space 13 through the glue flow channel 212 and the glue communication port 221. The flange end cap 22 is fixedly connected to the mounting end cap 11, and a limiting member 222 is fixedly arranged on the inner wall of the flange end cap 22 and accommodated in the hollow space 13 of the hollow pipe fitting 1; the hollow space 13 is used to accommodate a mandrel 14 wound with fiber materials, and both ends of the mandrel 14 are limited by the two limiting members 222.

[0034] The operation process of this embodiment is as follows: Prepare in advance a mandrel 14 wrapped with fiber material (of course, the mandrel 14 is coated with a release agent before winding the fiber material to facilitate subsequent demolding). The fiber material is wound by a fiber winding machine, and the fiber material on the mandrel 14 is flat and orderly. The mandrel 14 wrapped with fiber material is in clearance fit with the hollow space 13. First, install one of the glue injection assemblies 2 at one end of the hollow pipe fitting 1, then insert the mandrel 14 wrapped with fiber material from the other end of the hollow pipe fitting 1. The mandrel 14 is in clearance fit with the hollow space 13, and then install the other glue injection assembly 2. At this time, the mandrel 14 is inside the hollow space 13, circumferentially limited by the inner wall fibers of the pipe body 12, and both ends are limited by two limit members 222. After installation, inject resin glue from the glue communication port 221 of the glue injection assembly 2 (it can be injected only from the glue communication port 221 of one glue injection assembly 2, or injected simultaneously from the two glue injection assemblies 2). The glue flows into the glue circulation channel 212 through the glue communication port 221, enters the hollow space 13 through the glue communication port 221, and the injected glue quickly fills the remaining space inside the hollow space 13. The fiber material on the mandrel 14 is fully soaked with the glue. Subsequently, heat is applied to the surface of the glue injection tubes 21 of the two glue injection assemblies 2, and the resin glue in the glue circulation channels 212 of the glue injection tubes 21 will solidify. In this way, the glue in the hollow space 13 will not flow back, and the fiber material on the mandrel 14 in the hollow space 13 can have enough time to penetrate the glue. After the penetration time is up, the semi-finished products in the pipe mold can be centrally cured. After curing, demold and use machining to cut off the excess edges at both ends of the just-demolded semi-finished products, so as to obtain the finished product of the fiber-wound pipe.

[0035] Through a simple and ingenious structural design, this embodiment has changed the traditional production mode of fiber-wound pipes. There is no phenomenon of resin glue dripping, effectively reducing material waste and production costs, and effectively improving the cleanliness of the workshop, which conforms to the concept of green production and sustainable development;

[0036] This embodiment is convenient for turnover. By curing the glue at both ends first to ensure that the semi-finished products do not leak glue, the semi-finished products can be centrally processed, effectively simplifying the process and reducing production costs;

[0037] The fiber-wound pipe formed in this embodiment has a smooth surface, and the labor intensity of the subsequent processing operations after demolding is very low, further simplifying the production process and reducing production costs;

[0038] This embodiment greatly improves the production efficiency of the workshop, has very strong practicability, and has positive significance in the field of fiber-wound pipe production.

[0039] Embodiment 2

[0040] Based on Embodiment 1, this embodiment continues to describe in detail the technical features involved and the functions and roles played by these technical features in the present utility model, so as to help those skilled in the art fully understand the technical solution of the present utility model and reproduce it.

[0041] As Figure 5 shown, the limiting member 222 of this embodiment specifically includes four arc-shaped limiting blocks 2221 that are regularly spaced along the circumferential direction. The outer contour track formed by the four arc-shaped limiting blocks 2221 is circular, and the outer side walls of the four arc-shaped limiting blocks 2221 are in clearance fit with the inner wall of the hollow pipe fitting 1. The structural design of the four arc-shaped limiting blocks 2221 in this embodiment has three functions: First, it plays a limiting role for the mandrel 14 in the hollow space 13; Second, the arc-shaped limiting blocks 2221 are regularly spaced along the circumferential direction. Glue enters from the middle position, hits the end face of the mandrel 14 and then spreads to the surrounding, and flows evenly into the remaining space of the hollow space 13 from the spaced space between the two arc-shaped limiting blocks 2221. The glue is evenly distributed, filled fully and quickly; Third, the spaced space between the two arc-shaped limiting blocks 2221 will eventually be filled with glue. After curing, this part is redundant, and the space occupied by the arc-shaped limiting blocks 2221 themselves in the hollow space 13 will not be filled with glue. This makes it clear at a glance the redundant parts at both ends of the fiber-wound pipe after demolding, which is convenient for machining in the subsequent processing steps.

[0042] In this embodiment, a rubber tube installation groove 223 is opened on the flange end cover 22, which is connected to the glue communication port 221 and concentric with the glue communication port 221; the end of the glue injection tube 21 is in interference fit with the rubber tube installation groove 223. The structural design is simple and easy to implement.

[0043] In this embodiment, a conical seal 224 is fixedly installed on the inner wall of the glue head guide cone 211. A sealing structure is also provided between the flange end cover 22 and the installation end cover 11. The sealing structure includes an annular groove opened on the installation end cover 11, and an O-ring 111 is embedded in the annular groove.

[0044] In this embodiment, the installation end cover 11 and the flange end cover 22 are fixed together by bolt fasteners.

[0045] In summary, the above are only the preferred embodiments of the present utility model, and are not used to limit the scope of implementation of the present utility model. All equivalent changes and modifications made according to the shape, structure, features and spirit of the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A forming tube mold for producing a filament winding tube, characterized in that: It comprises a hollow pipe (1) and two glue injection components (2) located at two ends of the hollow pipe (1); The hollow pipe member (1) comprises a pipe body (12) and two mounting end covers (11) respectively arranged at two ends of the pipe body (12); The glue injection assembly (2) comprises a glue injection tube (21) and a flange end cover (22) fixedly connected to the glue injection tube (21); a glue circulation channel (212) is provided inside the glue injection tube (21) along the axial direction, one end of the glue circulation channel (212) is connected to a glue head guide cone (211) provided at the tube head position of the glue injection tube (21), and the other end is connected to a glue communication port (221) axially penetrating the flange end cover (22); the flange end cover (22) is fixedly connected to the mounting end cover (11), and a limiting member (222) is fixedly provided on the inner wall of the flange end cover (22) and is accommodated in the hollow space (13) of the hollow pipe member (1); the hollow space (13) is used to accommodate a core rod (14) wound with fiber material, and the two ends of the core rod (14) are limited by the two limiting members (222).

2. The forming tube mold for producing a filament wound tube according to claim 1, characterized in that: The limiting member (222) comprises four arc-shaped limiting blocks (2221) regularly distributed along the circumferential direction, the outer contour trajectory formed by the four arc-shaped limiting blocks (2221) is circular, and the outer side walls of the four arc-shaped limiting blocks (2221) are gap-matched with the inner wall of the hollow pipe (1).

3. The forming tube mold for producing a filament wound tube according to claim 1, characterized in that: The flange end cover (22) is provided with a hose installation groove (223) which is connected to the glue connection port (221) and is arranged cocentrically with the glue connection port (221); the end of the glue injection hose (21) is interference-fitted with the hose installation groove (223).

4. The forming tube mold for producing a filament wound tube according to claim 1, characterized in that: A conical sealing member (224) is fixedly mounted on the inner wall of the rubber head guide cone opening (211).

5. The forming tube mold for producing a filament wound tube according to claim 1, characterized in that: A sealing structure is provided between the flange end cover (22) and the mounting end cover (11).

6. The forming tube mold for producing a filament-wound tube according to claim 5, characterized in that: The sealing structure comprises an annular groove formed on the mounting end cover (11), wherein a sealing ring (111) is embedded in the annular groove.

7. The forming tube mold for producing a filament wound tube according to claim 1, characterized in that: The mounting end cover (11) and the flange end cover (22) are fixed together using bolt fasteners.

8. The forming tube mold for producing a filament wound tube according to claim 1, characterized in that: The pipe body (12) and the mounting end cover (11) are an integrated structure.

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