Forming die for large-diameter carbon fiber heat preservation cylinder

Abstract

The utility model relates to a forming die of a large-diameter carbon fiber heat preservation cylinder. The forming die comprises a top sealing plate, an inner die cylinder, a bottom supporting plate, a liquid suction pipe and a suction cavity volume reduction structure. The inner mold cylinder is arranged between the top sealing plate and the bottom supporting plate and is made of a sieve plate, and a screen is arranged on the outer surface; the outer diameter of the inner die cylinder is not less than 800mm; the suction cavity volume reduction structure is composed of one or more closed cavities, and the space between the inner mold cylinder outside the closed cavities and the top sealing plate and the space between the inner mold cylinder outside the closed cavities and the bottom supporting plate are suction cavities. By reducing the internal volume of the suction cavity in the forming die, increasing the suction force in the forming die and utilizing the existing vacuum liquid pumping device for producing the carbon fiber heat preservation cylinder with the conventional size, the large-diameter carbon fiber heat preservation cylinder can be produced, the forming success rate is high, the utilization rate of materials is effectively improved, the forming time is shortened, and the production efficiency is improved. And the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum forming technical field especially relates to a forming die of large diameter carbon fiber heat preservation cylinder (diameter 800mm above). BACKGROUND

[0002] The large diameter carbon fiber heat preservation cylinder refers to the carbon fiber heat preservation cylinder whose diameter exceeds certain size (usually 800mm above), which is widely used in military, national defense, solar energy, semiconductor, optical fiber, heat treatment and other fields as the heat preservation material of equipment. Compared with the carbon fiber heat preservation cylinder of conventional size (usually 600mm below), the large diameter carbon fiber heat preservation cylinder has some technical problems in the vacuum forming process.

[0003] At present, the forming device for the carbon fiber heat preservation cylinder of conventional size usually comprises a forming pool, a forming die, a forming trolley, a vacuum tank and a water ring vacuum pump (such as the "vacuum suction forming device for manufacturing composite carbon fiber heat preservation cylinder" disclosed in the Chinese utility model patent with the authorization announcement number CN 206598435 U); the forming die is immersed in the carbon fiber mixed slurry stored in the forming pool; the forming die is composed of an inner die, an outer die and an end plate, a suction pipe arranged coaxially, the inner die and the outer die are both cylindrical dies, the two ends of the inner die and the outer die are respectively attached to the upper end plate and the lower end plate to form a vacuum forming chamber, and the size and shape of the vacuum forming chamber are matched with the composite carbon fiber heat preservation cylinder; the suction pipe is arranged along the center of the inner die, and the suction pipe is provided with suction holes; one end of the suction pipe is connected to the vacuum tank, and the vacuum tank is further connected to the water ring vacuum pump. Under the action of the suction pipe, the carbon fiber mixed slurry is regularly arranged and formed in the vacuum forming chamber.

[0004] When the above-mentioned forming device for the carbon fiber heat preservation cylinder is used to manufacture the large diameter carbon fiber heat preservation cylinder, the internal space of the forming die is too large, and a large amount of solution is stored, the suction force of the existing suction equipment is insufficient, so that the carbon fiber cannot be gathered on the outer sidewall of the forming die, but scattered in the forming pool, thereby causing the forming failure. In this case, if the forming process is to be realized, the forming die needs to be extremely slowly lifted, and the lifting process is not continuous, but needs to be paused for a period of time until the carbon fiber is deposited on the sidewall of the die to reach the set thickness before continuing to lift upward; therefore, the finally formed carbon fiber heat preservation cylinder will form a stepped cylindrical structure with a large diameter at the lower part and a small diameter at the upper part, which not only greatly reduces the utilization rate of the material, but also increases the workload of subsequent processing, resulting in reduced production efficiency and increased cost. SUMMARY

[0005] The utility model provides a kind of forming mould of large-diameter carbon fiber heat preservation cylinder, by reducing the internal volume of suction cavity in forming mould, increase the suction force inside forming mould, using the vacuum liquid extraction device of conventional size carbon fiber heat preservation cylinder of existing production, large-diameter carbon fiber heat preservation cylinder can be produced, and the success rate of forming is high, effectively improve the utilization of material, shorten the forming time, reduce production cost.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A kind of forming mould of large-diameter carbon fiber heat preservation cylinder, including coaxially arranged top sealing plate, inner mould cylinder, bottom supporting plate and liquid extraction pipe;The inner mould cylinder is located between top sealing plate and bottom supporting plate, the top of inner mould cylinder is sealingly connected with top sealing plate, and the bottom of inner mould cylinder is sealingly connected with bottom supporting plate;The inner mould cylinder is made of sieve plate, and the outer surface is provided with sieve screen;The outer diameter of the inner mould cylinder is greater than or equal to 800 mm, and the forming mould further includes suction cavity volume reduction structure;The suction cavity volume reduction structure is composed of one to multiple closed cavities, the closed cavities are arranged in the inner mould cylinder, and the top of the closed cavities is sealingly connected with the top sealing plate, and the bottom of the closed cavities is sealingly connected with the bottom supporting plate;The space between the inner mould cylinder outside the closed cavities and the top sealing plate and the bottom supporting plate is the suction cavity;One end of the liquid extraction pipe vertically extends into the suction cavity, and the extending end is provided with a suction hole, and the other end of the liquid extraction pipe is connected with a vacuum suction liquid extraction device.

[0008] The bottom of the top sealing plate is provided with a limiting plate, and the top is provided with a lifting ring fixing plate, and a lifting ring is arranged on the lifting ring fixing plate;The lifting ring fixing plate, the top sealing plate and the limiting plate are coaxially arranged, and are detachably fixedly connected through bolts, and the bolt holes are drilled.

[0009] The inner mould cylinder is a conical structure with a small diameter at the upper end and a large diameter at the lower end;The sieve holes on the sieve plate have a diameter of 5-10 mm, and the opening rate is 40-60%, and the material of the sieve plate is stainless steel.

[0010] The closed cavities are formed by stainless steel pipes, and the pipes are evenly arranged along the circumference of the inner mould cylinder outside the liquid extraction pipe.

[0011] The liquid extraction pipe is made of stainless steel pipe, and the suction holes on the liquid extraction pipe are circular holes with a diameter of 10-20 mm, and multiple suction holes are evenly arranged along the axial and circumferential directions of the liquid extraction pipe.

[0012] The liquid extraction pipe is connected with the bottom supporting plate through a liquid extraction pipe fixing plate, and the liquid extraction pipe fixing plate is coaxially arranged with the bottom supporting plate, and the liquid extraction pipe fixing plate has a hole in the middle for the liquid extraction pipe to pass through, and the liquid extraction pipe fixing plate and the bottom supporting plate are detachably fixedly connected through bolts.

[0013] The vacuum liquid pumping device is composed of a liquid storage tank and a water ring vacuum pump, one end of a pumping pipe is connected with a hose through a quick connector, and the other end of the hose is connected with the liquid storage tank and the water ring vacuum pump in sequence.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1) By reducing the internal volume of the forming mold, the internal suction force of the forming mold is improved, and the existing vacuum liquid pumping device for producing conventional size carbon fiber heat preservation cylinders can be used to produce large-diameter carbon fiber heat preservation cylinders, and the success rate of forming is high.

[0016] 2) The forming mold of the utility model effectively improves the forming efficiency of the large-diameter carbon fiber heat preservation cylinder product, shortens the forming time, significantly improves the production efficiency, and reduces the production cost.

[0017] 3) The forming mold of the utility model can effectively improve the utilization rate of materials and reduce the generation of waste, thereby greatly reducing the production cost.

[0018] 4) The forming mold of the utility model has simple structure and easy manufacturing, which is beneficial to realize the quantitative production of large-diameter carbon fiber heat preservation cylinder products. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the appearance of the forming mold of the large-diameter carbon fiber heat preservation cylinder of the utility model.

[0020] Figure 2 is a front view of the forming mold of the large-diameter carbon fiber heat preservation cylinder of the utility model.

[0021] Figure 3 is Figure 2 A-A sectional view in the

[0022] Figure 4 is a schematic diagram of the three-dimensional structure of the pumping pipe of the utility model.

[0023] In the figure: 11. lifting eye 12. bolt 13. nut 14. lifting eye fixing plate 15. limiting plate 21. top sealing plate 22. inner mold cylinder 23. closed cavity 24. bottom supporting plate 31. pumping pipe fixing plate 32. pumping pipe DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model will be further described below in combination with the drawings:

[0025] For example, Figures 1-3As shown, the large-diameter carbon fiber heat preservation cylinder forming die comprises a top sealing plate 21, an inner mold cylinder 22, a bottom supporting plate 24 and a liquid suction pipe 32 arranged coaxially; the inner mold cylinder 22 is arranged between the top sealing plate 21 and the bottom supporting plate 24, the top of the inner mold cylinder 22 is sealingly connected with the top sealing plate 21, and the bottom of the inner mold cylinder 22 is sealingly connected with the bottom supporting plate 24; the inner mold cylinder 22 is made of a sieve plate, and the outer surface is provided with a sieve screen; the outer diameter of the inner mold cylinder 22 is greater than or equal to 800 mm, and the forming die further comprises a suction cavity volume reduction structure; the suction cavity volume reduction structure is composed of one or more closed cavities 23, the closed cavities 23 are arranged in the inner mold cylinder 22, the top of the closed cavities 23 is sealingly connected with the top sealing plate 21, and the bottom of the closed cavities 23 is sealingly connected with the bottom supporting plate 24; the space between the inner mold cylinder 22 outside the closed cavities 23 and the top sealing plate 21 and the bottom supporting plate 24 is a suction cavity; one end of the liquid suction pipe 32 vertically extends into the suction cavity, and the extending end is provided with a suction hole, and the other end of the liquid suction pipe 32 is connected with a vacuum suction liquid device.

[0026] The bottom of the top sealing plate 21 is provided with a limiting plate 15, the top is provided with a lifting ring fixing plate 14, and the lifting ring fixing plate 14 is provided with a lifting ring 11; the lifting ring fixing plate 14, the top sealing plate 21 and the limiting plate 15 are coaxially arranged, and are detachably fixedly connected through bolts 12, and the bolt holes are drilled.

[0027] The inner mold cylinder 22 is a conical cylinder structure with a small upper end diameter and a large lower end diameter; the sieve hole diameter of the sieve plate is 5-10 mm, the opening rate is 40%-60%, and the material of the sieve plate is stainless steel.

[0028] The closed cavities 23 are formed by stainless steel round pipes, and the plurality of stainless steel round pipes are uniformly arranged along the circumferential direction of the inner mold cylinder 22 outside the liquid suction pipe 32.

[0029] As shown in the drawings, Figure 4 The liquid suction pipe 32 is made of a stainless steel pipe, the suction holes on the liquid suction pipe 32 are circular holes with a diameter of 10-20 mm, and a plurality of suction holes are uniformly arranged along the axial direction and the circumferential direction of the liquid suction pipe 32.

[0030] The liquid suction pipe 32 is connected with the bottom supporting plate 24 through a liquid suction pipe fixing plate 31, the liquid suction pipe fixing plate 31 is coaxially arranged with the bottom supporting plate 24, a hole is formed in the middle of the liquid suction pipe fixing plate 31 for the liquid suction pipe 32 to pass through, and the liquid suction pipe fixing plate 31 and the bottom supporting plate 24 are detachably fixedly connected through the bolts 12.

[0031] The vacuum liquid suction device is composed of a liquid storage tank and a water ring vacuum pump, one end of the liquid suction pipe 32 is connected with a soft pipe through a quick connector, and the other end of the soft pipe is sequentially connected with the liquid storage tank and the water ring vacuum pump.

[0032] The outer side of the inner mold barrel 22 is an open molding space. The outer diameter of the inner mold barrel 22 is the same as the inner diameter of the carbon fiber insulation cylinder after molding. The height and diameter of the carbon fiber insulation cylinder are adjustable. The upper diameter of the inner mold barrel 22 is slightly smaller than the lower diameter, forming a tapered cylinder structure, which facilitates demolding of the molded carbon fiber insulation cylinder.

[0033] The top cover plate 21, inner mold barrel 22, closed cavity 23, and bottom support plate 24 together constitute the mold body, which can be customized to various sizes depending on the finished carbon fiber insulation tube dimensions. To increase the versatility of the lifting ring 11 and the lifting ring fixing plate 14, a stop plate 15 is installed between the top cover plate 21 and the lifting ring fixing plate 14. Holes in the top cover plate 21, the lifting ring fixing plate 14, and the stop plate 15 are drilled. These holes are connected by bolts 12 and tightened by nuts 13, allowing the lifting ring 11 and the lifting ring fixing plate 14 to adapt to mold bodies of various sizes.

[0034] When the molding die of a large-diameter carbon fiber insulation tube described in the present invention is used, the molding die is hung on the hook of a crane through a hanging ring 11. The molding die is moved by the crane and immersed in a molding pool filled with carbon fiber mixed slurry. The liquid extraction pipe 32 is connected to the liquid storage tank and the water ring vacuum pump through a hose. Under the suction action of the liquid extraction pipe 32, the carbon fiber mixed slurry is adsorbed on the outer wall of the inner mold tube 22 and arranged and stacked in layers until the outer diameter reaches the set size. The molding is completed. The molded carbon fiber insulation tube blank is put on the molding die for curing. The cured carbon fiber insulation tube is removed from the molding die to obtain a finished carbon fiber insulation tube.

[0035] The following examples are implemented under the premise of the technical solution of the present utility model, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0036] [Example]

[0037] like Figures 1-4 As shown, this embodiment manufactures a large-diameter carbon fiber insulation tube with a diameter of 850 mm, and utilizes the existing vacuum liquid extraction device for producing conventional-sized (diameter less than 600 mm) carbon fiber insulation tubes. By adding several closed cavities 23 in the suction cavity of the forming mold, the internal volume of the forming mold is reduced, and the adsorption force on the carbon fiber during molding is improved, the one-time molding success rate reaches more than 90%.

[0038] The molding die of this embodiment includes: a lifting ring 11, a lifting ring fixing plate 14, a limiting plate 15, a top sealing plate 21, an inner mold cylinder 22, a closed cavity 23, a bottom supporting plate 24, a liquid extraction tube fixing plate 31 and a liquid extraction tube 32, etc.

[0039] The hanging ring 11 is in U-shaped structure, and both ends are welded on the hanging ring fixing plate 14.

[0040] The main structure of the forming die is composed of a top sealing plate 21, an inner mold cylinder 22, a closed cavity 23 and a bottom supporting plate 24. The top sealing plate 21 and the bottom supporting plate 24 are coaxially arranged. The top sealing plate 21 and the bottom supporting plate 24 are both circular stainless steel plates. The closed cavity 23 is a cylindrical structure with both ends open, and the two ends of the closed cavity 23 are fixedly connected with the corresponding top sealing plate 21 and bottom supporting plate 24.

[0041] The inner mold cylinder 22 is a conical cylinder structure with the upper end diameter slightly smaller than the lower end diameter and both ends open, and the top sealing plate 21, the bottom supporting plate 24 and the inner mold cylinder 22 jointly form a suction cavity, and the periphery of the suction cavity is an open forming space. In this embodiment, the nominal outer diameter of the suction cavity is 850mm, which matches the inner diameter of the large-diameter carbon fiber heat preservation cylinder to be manufactured.

[0042] In this embodiment, the suction cavity volume reduction structure is composed of six closed cavities 23, and the closed cavities 23 are made of steel pipes of 304 stainless steel material, and the outer diameter of the closed cavities 23 is 133mm. The upper end and the lower end of the closed cavity 23 are fixedly connected with the corresponding top sealing plate 21 and bottom supporting plate 24. The six closed cavities 23 are uniformly distributed in the circumferential direction around the liquid suction pipe 32 with the axis of the inner mold cylinder 22 as the central axis.

[0043] In this embodiment, the inner mold cylinder 22 is made of a 304 stainless steel sieve plate with a hole diameter of 5mm and an opening rate of 40%. A layer of 304 stainless steel screen is fixed to the outer surface of the inner mold cylinder 22, and the hole diameter of the screen is 200μm.

[0044] In this embodiment, the liquid suction pipe 32 is made of a 304 stainless steel pipe, and a plurality of suction holes are arranged in the axial and circumferential directions of the part of the liquid suction pipe 32 extending into the suction cavity, and the hole diameter of the suction hole is 15mm. The suction holes at different positions in the axial direction are arranged alternately. The liquid suction pipe 32 is arranged along the axial length of the suction cavity; the outer end of the liquid suction pipe 32 is connected with a liquid storage tank through a quick connector and a hose, and the liquid storage tank is additionally connected with a water ring vacuum pump.

[0045] In this embodiment, the top of the forming die is provided with a hanging ring 11, and the hanging ring 11 is connected with the top sealing plate 21 through a hanging ring fixing plate 14 and a limiting plate 15. When in use, the hanging ring 11 is hung on the hook of the crane, and the forming die is placed vertically downward into the forming pool, and the height and position of the forming die in the forming pool are adjusted by the lifting and moving operations of the crane.

[0046] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and concept of the present application, can make equivalent substitutions or changes within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application.

Claims

1. A forming mold for a large-diameter carbon fiber insulation cylinder, comprising a coaxially arranged top sealing plate, an inner mold cylinder, a bottom supporting plate, and a liquid extraction tube; the inner mold cylinder is arranged between the top sealing plate and the bottom supporting plate, the top of the inner mold cylinder is sealed to the top sealing plate, and the bottom of the inner mold cylinder is sealed to the bottom supporting plate; the inner mold cylinder is made of a sieve plate, and a sieve is provided on the outer surface; characterized in that The outer diameter of the inner mold cylinder is ≥800mm, and the molding mold also includes a suction chamber volume reduction structure; the suction chamber volume reduction structure is composed of one to multiple closed chambers, and the closed chamber is arranged in the inner mold cylinder, and the top of the closed chamber is sealed to the top sealing plate, and the bottom of the closed chamber is sealed to the bottom support plate; the space between the inner mold cylinder outside the closed chamber and the top sealing plate and the bottom support plate is the suction chamber; one end of the liquid extraction tube extends vertically upward into the suction chamber, and a suction hole is provided at the extending end, and the other end of the liquid extraction tube is connected to the vacuum liquid extraction device.

2. The forming die of a large-diameter carbon fiber thermal insulation cylinder according to claim 1, characterized in that: The bottom of the top sealing plate is provided with a limit plate, the top is provided with a lifting ring fixing plate, and the lifting ring fixing plate is provided with a lifting ring; the lifting ring fixing plate, the top sealing plate and the limit plate are coaxially arranged, and the three are detachably fixed and connected by bolts, and the bolt holes are drilled.

3. The forming die of a large-diameter carbon fiber thermal insulation cylinder according to claim 1, characterized in that: The inner mold cylinder is a conical cylinder structure with a small diameter at the upper end and a large diameter at the lower end; the diameter of the sieve holes on the sieve plate is 5-10 mm, the opening rate is 40%-60%, and the material of the sieve plate is stainless steel.

4. The forming die for a large-diameter carbon fiber thermal insulation cylinder according to claim 1, characterized in that: The closed cavity is formed by a stainless steel round tube, and a plurality of stainless steel round tubes are evenly arranged on the outside of the liquid extraction tube along the circumference of the inner mold cylinder.

5. The forming die of a large-diameter carbon fiber thermal insulation cylinder according to claim 1, characterized in that: The liquid extraction tube is made of a stainless steel tube. The suction holes on the liquid extraction tube are circular holes with a diameter of 10 to 20 mm. The plurality of suction holes are evenly arranged along the axial direction and the circumferential direction of the liquid extraction tube.

6. The forming die for a large-diameter carbon fiber thermal insulation cylinder according to claim 1, characterized in that: The liquid extraction tube is connected to the bottom support plate through a liquid extraction tube fixing plate. The liquid extraction tube fixing plate and the bottom support plate are coaxially arranged. A hole is opened in the middle of the liquid extraction tube fixing plate for the liquid extraction tube to pass through. The liquid extraction tube fixing plate and the bottom support plate are detachably fixed by bolts.

7. The forming die for a large-diameter carbon fiber thermal insulation cylinder according to claim 1, characterized in that: The vacuum liquid extraction device consists of a liquid storage tank and a water ring vacuum pump. The liquid extraction pipe is connected to one end of a hose through a quick connector, and the other end of the hose is connected to the liquid storage tank and the water ring vacuum pump in sequence.

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