Glue injection tank for vacuum infusion process

Abstract

The utility model discloses a glue injection tank for a vacuum infusion process, which comprises a barrel body, and support legs are arranged at the bottom of the barrel body; an inner container is arranged in the barrel body, and a heating layer is arranged outside the barrel body; a visible window is arranged on the barrel body; an upper cover is arranged at the top of the barrel body, and a pressure gauge, a glue injection pipe two-way joint and an air compressor air pipe joint are arranged on the upper cover. The inner container is a plastic film inner container and is fixed through an inner container fixing clamp. The heating layer is connected with a heating layer control meter, and the heating layer control meter is fixed on the outer side of the barrel body. The heating layer is arranged, so that the problems of heating of resin before vacuum infusion and heat preservation of the resin in the infusion process are solved, the resin is promoted to be kept in a low-viscosity state, and impregnation of fiber fabric and improvement of the infusion speed are facilitated. The cleaning device is simple to clean, and the cleaning efficiency is improved by adopting the replaceable low-cost plastic film liner and the glue injection hose.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum infusion molding process technical field especially relates to a kind of glue injection tank for vacuum infusion process. BACKGROUND

[0002] At present, because the characteristics of light weight, high strength, corrosion resistance and the like of composite material, the application of composite material is more and more common, and is widely used in aerospace, military industry, automobile, wind power, ocean and the like. As an important molding process of composite material, vacuum infusion process is also widely used, and the representative ones include wind power blade and bus body and the like. At present, many composite material insulator cores are also formed by using this process, and have been successfully used in large quantities in ultra-high voltage line in recent years.

[0003] Compared with other composite material processes, vacuum infusion process has obvious advantages, such as high fiber content, high strength of product, less internal defects, suitable for power industry, no volatile substances in closed mold forming, which is beneficial to environmental protection. Vacuum infusion process is made by using vacuum pressure, the fiber fabric is laid first, the flow guide medium such as flow guide net is laid on the surface of the fiber fabric, then the mold is closed or the vacuum bag film is covered, the closed mold space is vacuumized, and finally the resin in the glue injection tank is introduced into the mold cavity under the condition of vacuum in the closed mold to fully impregnate the fiber fabric.

[0004] At present, the focus of vacuum infusion process is mainly on the layout of flow channel, and the attention to the heat preservation of resin during infusion is insufficient. The viscosity of most epoxy resins is large, and needs to be heated to about 50 DEG C to reach a relatively ideal viscosity. The large viscosity of resin seriously affects the infusion speed, and it is not easy to discharge air bubbles, which leads to too many air bubbles in the product and affects the performance of the product. The infusion time of some large products is relatively long, such as the infusion time of large-diameter composite material insulator post core can reach 8-9h, so the heat preservation function of resin tank during infusion is particularly important. At present, the glue injection tank is mainly ordinary plastic tank or other metal tank. The viscosity of resin becomes large due to the long infusion time and the cooling of resin, and finally the surface of the formed product will form relatively dense micro-bubbles. The infusion time of large products formed by vacuum infusion process is relatively long, and some resins that cure quickly will cause the product to be scrapped because the fiber has not been fully impregnated with resin. Moreover, this process is prone to local air entrapment due to unreasonable flow channel layout, which leads to local defects in the product. To solve these two problems, using pressurizable glue injection tank is one of the effective solutions. However, the current glue injection tank has several shortcomings, such as: the tank body does not have heating function; the resin liquid level cannot be observed during infusion, which is easy to cause the resin to be exhausted and enter the air in the closed mold, and then lead to the product to be whitened after forming; the glue injection tank is not convenient to clean, and if the resin in the glue injection tank is solidified, it is very difficult to clean up. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of glue injection tanks for vacuum infusion process, can realize heating function, cleaning is convenient, auxiliary pressurization, liquid level is visible.

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

[0007] A kind of glue injection tank for vacuum infusion process, including barrel, the bottom of the barrel is equipped with support leg;The inside of the barrel is equipped with inner bag, and the outside of the barrel is equipped with heating layer;The barrel is equipped with visible window;

[0008] The top of the barrel is equipped with upper cover, and the upper cover is equipped with pressure gauge, glue injection pipe two-way joint and air compressor air pipe joint.

[0009] The inner bag is fixed by inner bag fixing clamp.

[0010] The heating layer is connected with heating layer control table, and the heating layer control table is arranged outside the barrel.

[0011] The upper cover is fixed on the barrel by upper cover fixing clamp.

[0012] The visible window is made of stainless steel frame type alkali-free alumino-silicate glass long strip transparent sight glass, and the visible range is 500mm.

[0013] The air compressor air pipe joint is provided with one, and the glue injection pipe two-way joint is provided with at least one.

[0014] One end of the glue injection pipe two-way joint is connected with the glue injection pipe in the tank, and the other end is connected with the glue injection pipe outside the tank.

[0015] The heating layer includes inner layer, middle layer and outer layer, the inner layer is provided with silica gel nickel-chromium alloy heating wire, the middle layer is alumina-silicate flame-retardant insulation cotton, and the outer layer is silica gel glass fiber flame-retardant cloth, and the silica gel nickel-chromium alloy heating wire is connected with temperature controller.

[0016] The glue injection pipe outside the tank is made of polytetrafluoroethylene hose with inner diameter of 14mm and outer diameter of 16mm.

[0017] The utility model has the advantages of:

[0018] The utility model is provided with heating layer, solves the heating of resin before vacuum infusion and the heat preservation problem of resin during infusion process, promotes resin to keep low viscosity state, and is beneficial to the impregnation of fiber fabric and the improvement of infusion speed.

[0019] The utility model is clean and simple, uses replaceable low-cost plastic film inner bag and glue injection hose to improve cleaning efficiency.

[0020] This invention enables visualization of the liquid level through a viewing window, preventing air from entering the mold cavity of the fiber fabric due to resin depletion.

[0021] This utility model is equipped with a pressure gauge and an air compressor pipe connector, which can improve the vacuum filling efficiency by pressurizing and reduce defects caused by poor impregnation inside the product. Attached Figure Description

[0022] Fig. 1 This is a front view of the glue injection tank;

[0023] Fig. 2 This is a top view of the glue injection tank;

[0024] Among them, 1-plastic film inner liner, 2-inner liner fixing clip, 3-two-way connector of glue injection tube, 4-glue injection tube, 5-air compressor air pipe connector, 6-heating layer control table, 7-heating layer, 8-top cover fixing clip, 9-pressure gauge, 10-viewing window, 11-support leg, 12-top cover, 13-bucket body. Detailed implementation method:

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] A dispensing tank for vacuum infusion process, such as Figs. 1-2 As shown, the device includes a barrel body 13, with support legs 11 at the bottom; an inner liner is provided inside the barrel body 13, and a heating layer 7 is provided on the outside of the barrel body 13; a viewing window 10 is provided on the barrel body 13.

[0027] The top of the barrel 13 is provided with a cover 12, and the cover 12 is provided with a pressure gauge 7, a two-way connector for the glue injection tube 3 and an air compressor pipe connector 5.

[0028] The inner liner is made of a flexible transparent polyester plastic film liner 1, and the top is fixed by the inner liner fixing clip 2. The plastic film inner liner 1 is low cost, can be frequently replaced, and is easy to clean.

[0029] The air compressor hose connector 5 is a C-type self-locking connector for easy connection to an air compressor. Air compressor hose connector 5 can be connected to an air compressor for pressurizing the tank. A pressure gauge 9 is located next to air compressor hose connector 5 to monitor the tank pressure and prevent overpressure. Around air compressor hose connector 5 are two-way glue injection hose connectors 3; one end of the two-way glue injection hose connector 3 connects to the glue injection hose inside the tank, and the other end connects to the glue injection hose outside the tank.

[0030] The viewing window 10 is welded to the barrel body 13. The viewing window 10 is a long transparent stainless steel frame-type alkali-free aluminosilicate glass with excellent pressure resistance and a viewing range of 500mm.

[0031] The top cover is fixed to the barrel body using a top cover fixing clip 8.

[0032] The heating layer 7 is connected with the heating layer control table 6, and the heating layer control table is fixed outside the barrel body. The heating layer includes an inner layer, a middle layer and an outer layer, the inner layer is provided with a silica gel nickel-chromium alloy heating wire, the middle layer is silica alumina flame-retardant insulation cotton, and the outer layer is silica glass fiber flame-retardant cloth. The silica gel nickel-chromium alloy heating wire is connected with a temperature controller, and the temperature can be controlled within 100℃. The heating layer avoids the visible window.

[0033] The pressure gauge 7 selects a pressure gauge with a range of 1Mpa.

[0034] One end of the glue injection pipe two-way joint is connected with the glue injection pipe in the tank, and the other end is connected with the glue injection pipe outside the tank. The glue injection pipe adopts a polytetrafluoroethylene hose with a high temperature and high pressure resistance, with an inner diameter of 14mm and an outer diameter of 16mm.

[0035] The glue injection pipe joint adopts a two-way pagoda joint to facilitate the connection of the glue injection pipe.

[0036] The plastic film inner container 1 is laid inside the barrel body 13, and the plastic film inner container 1 is fixed by using the plastic film inner container fixing clamp 2 to prevent the plastic film inner container 1 from sliding off the inner wall of the barrel body 13. The mixed preheated resin is added into the cavity of the plastic film inner container 1, and the amount of resin is calculated before adding to avoid insufficient resin. It is noted that the liquid level should be lower than the inner container fixing clamp 2, at least 50mm lower. The heating layer control table 6 is adjusted to 50℃. According to the depth of the barrel body 13, the appropriate length of the glue injection pipe 4 is cut, and the length of the glue injection pipe 4 is about 5mm shorter than the depth of the barrel body. When cutting the glue injection pipe 4, one end is cut into a straight port and the other end is cut into an inclined port. The straight port is inserted into the lower interface of the glue injection pipe two-way joint 3. The upper cover 12 with the inserted glue injection pipe 4 is placed on the upper opening of the barrel body 13, and the upper cover 12 is fixed with the barrel body 13 by using the upper cover fixing clamp 8. The female joint of the air compressor pipe is inserted into the air compressor pipe joint 5. The glue injection pipe 4 of the composite material support core fiber preform wrapped with a vacuum bag film is folded and bound with adhesive tape. The vacuum pump is used to extract vacuum, and the fiber preform is preheated for 2h during vacuum extraction. Then, the glue injection pipe 4 of the preform is inserted into the upper interface of the glue injection pipe two-way joint 3, and the seal is wrapped with black sealant. The adhesive tape binding the glue injection pipe 4 of the preform is cut. After the resin completely enters the preform mold cavity, the air compressor is adjusted to pressurize. During the pressurization process, the injection tank pressure gauge 9 is observed. If the pressure is greater than 0.8Mpa, the air compressor is turned off in time. During the pouring process, the visible window 10 is observed. If the liquid level is about to reach the bottom, the glue injection pipe is folded in time to avoid the preform mold cavity entering air due to the depletion of resin. After the pouring is completed, the female joint of the air compressor pipe is pulled out, and the product is cured. After the product is completely cured, the upper cover 12 is removed, and all the glue injection pipes 4 are pulled out. If the resin in the glue injection pipe two-way joint 3 is cured, it can be cleaned by using a hand drill. The remaining resin in the barrel can be cleaned by directly taking out the plastic film inner container 1.

[0037] The utility model discloses above although the specific embodiment of the utility model has been described in conjunction with the drawing, is not the limit to the protection scope of the utility model, and the person skilled in the art should understand that on the basis of the technical scheme of the utility model, various modifications or deformation that the person skilled in the art can make without paying creative labour are still within the protection scope of the utility model.

Claims

1. A resin injection tank for a vacuum infusion process, characterized by, It comprises a barrel, the bottom of which is provided with supporting legs; the inside of the barrel is provided with an inner container, and the outside of the barrel is provided with a heating layer; a visual window is arranged on the barrel; The top of the barrel is provided with an upper cover, which is provided with a pressure gauge, a two-way joint of glue injection pipe and a joint of air pipe of air compressor.

2. The injection canister for a vacuum infusion process according to claim 1, wherein The inner container adopts a plastic film inner container, which is fixed by an inner container fixing clamp.

3. The injection canister for vacuum infusion process according to claim 1, wherein, The heating layer is connected with a heating layer control table, which is fixed on the outside of the barrel.

4. The injection canister for vacuum infusion process according to claim 1, wherein, The upper cover is fixed on the barrel by an upper cover fixing clamp.

5. The injection canister for vacuum infusion process according to claim 1, wherein, The visual window adopts a stainless steel frame type alkali-free alumino-silicate glass long strip transparent sight glass, and the visual range is 500 mm.

6. The injection canister for a vacuum infusion process according to claim 1, wherein The joint of air pipe of air compressor is provided with one, and the two-way joint of glue injection pipe is provided with at least one.

7. The injection canister for vacuum infusion process according to claim 1, wherein, One end of the two-way joint of glue injection pipe is connected with an inner injection pipe, and the other end is connected with an outer injection pipe.

8. The injection canister for vacuum infusion processes as claimed in claim 1, characterized in that The heating layer comprises an inner layer, a middle layer and an outer layer, the inner layer is provided with a silica gel nickel-chromium alloy heating wire, the middle layer is alumino-silicate fire-retardant thermal insulation cotton, and the outer layer is silica gel glass fiber fire-retardant cloth, and the silica gel nickel-chromium alloy heating wire is connected with a temperature controller.

9. The injection canister for a vacuum infusion process of claim 7, wherein, The outer injection pipe adopts a polytetrafluoroethylene hose with an inner diameter of 14 mm and an outer diameter of 16 mm.

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