Glue injection device for infiltrating resin glue material for composite material pultrusion process

Abstract

The utility model relates to the field of pultrusion, in particular to a resin sizing material infiltrated glue injection device for a composite material pultrusion process, which comprises an infiltrating piece capable of accommodating a resin sizing material, and the infiltrating piece is of a cylindrical structure; one end of the infiltration part is detachably connected with the mold, the other end of the infiltration part is detachably connected with the yarn passing barrel, and the yarn passing barrel comprises a barrel body with openings in the two opposite sides; a first groove is formed in the bottom surface, close to the mold, of the infiltration part, a second groove is formed in the bottom surface, close to the yarn passing barrel, of the infiltration part, the bottom of the first groove is communicated with the bottom of the second groove, and the cross section area of the second groove is larger than that of the first groove; and a glue inlet pipe communicated with the first groove is arranged on the infiltration piece. An existing resin sizing material infiltration device for the composite material pultrusion process has the problems that the product quality is low, and more resin sizing materials are wasted. Products produced by the device are high in quality, and less resin sizing materials are wasted.

Description

Technical Field

[0001] The utility model relates to the field of pultrusion molding, in particular to a glue injection device for impregnating resin glue material in a composite material pultrusion molding process. Background Art

[0002] Pultruded composite materials (referred to as "composite materials" in this application) have the advantages of high manufacturing efficiency, high strength to stiffness to weight ratio, excellent corrosion resistance, and excellent dimensional stability. Therefore, they have been widely used. For example, products used in the electrical market include: cable trays, ladder racks, brackets, insulating ladders, insulator cores, transformer isolation rods, motor slot wedges, street lamp posts, electrified railway third rail protective covers, optical fiber cable cores, etc.; products used in the chemical and anti-corrosion markets include: glass fiber reinforced resin-based sucker rods, cooling tower brackets, offshore oil production equipment platforms , walking grilles, stair handrails and brackets, structural supports for chemical corrosion environments, water treatment plant covers, etc.; fishing rods, tent poles, umbrella frames, flagpoles, tool handles, lamp posts, railings, handrails, stairs, radio antennas, yacht docks, garden tools and accessories used in the outdoor field; applications in the construction market include: doors and windows, concrete formwork, scaffolding, stair handrails, house partition wall panels, reinforcement materials, decorative materials, etc.; applications in the road traffic market include: isolation barriers on both sides of the highway, road sign piles, road signs, pedestrian overpasses, sound insulation walls, etc.

[0003] Composite materials are formed using the pultrusion process. The main process flow of the pultrusion process is: glass fiber arrangement → impregnation with resin → preforming → die extrusion and curing → pulling → cutting → product. Currently, people usually use open dipping tanks to impregnate resin, but existing dipping tanks have the following three problems:

[0004] (1) The resin material in the dipping tank is updated slowly. As the time of the resin material in the dipping tank increases, the resin material will gradually age and increase in viscosity, affecting the effect of the reinforcing fiber yarn impregnated with the resin material, thereby affecting the product quality;

[0005] (2) When the reinforcing fiber yarn impregnated with resin is pulled and extruded by the mold, the excess resin on the reinforcing fiber yarn will be squeezed back into the dipping tank at the mold mouth. The refluxed resin has been in contact with the high temperature of the mold mouth. After reflux, it will further aggravate the aging of the resin in the dipping tank, affecting the product quality.

[0006] (3) When the resin material in the dipping tank ages to a certain extent, it is necessary to replace all the resin material in the dipping tank, which will cause waste of the resin material and is not environmentally friendly.

[0007] Therefore, the existing device for impregnating resin rubber material in the composite material pultrusion process has the problems of low product quality and high waste of resin rubber material. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a glue injection device for impregnating resin glue for composite material pultrusion molding process, which has high product quality and less waste of resin glue.

[0009] In order to solve the above technical problems, the utility model provides a glue injection device for impregnating resin glue in a composite material pultrusion molding process, including a soaking piece capable of accommodating resin glue, the soaking piece has a cylindrical structure; one end of the soaking piece is detachably connected to a yarn passing drum, and the yarn passing drum includes a cylinder with openings on two opposite sides; a first groove is provided on the bottom surface of the soaking piece away from the yarn passing drum, and a second groove is provided on the bottom surface of the soaking piece close to the yarn passing drum, the bottom of the first groove is connected to the bottom of the second groove, and the cross-sectional area of ​​the second groove is larger than the cross-sectional area of ​​the first groove; a glue inlet pipe connected to the first groove is provided on the soaking piece.

[0010] As a further improvement of the present invention, the cross section of the wetting member, the cross section of the barrel, the cross section of the first groove and the cross section of the second groove are all circular structures.

[0011] Preferably, a first bushing for detachably connecting to the mold is detachably mounted on one end of the impregnating member away from the yarn bobbin.

[0012] Preferably, the other end of the impregnating member is detachably connected to the yarn passing drum via a second bushing.

[0013] Preferably, the second groove is threadably connected to the second bushing, and a circular plate is fixedly sleeved on the outer side of one end of the cylinder close to the wetted part, and the circular plate is bolted to the second bushing.

[0014] Preferably, a gasket is provided between the second bushing and the annular plate.

[0015] As a further improvement of the present invention, a regulating ball valve for adjusting the feed amount of the rubber inlet pipe is provided on the rubber inlet pipe.

[0016] As a further improvement of the present invention, a threading plate is slidably installed in the second groove for the reinforcing fiber yarn to pass through and can evenly distribute the reinforcing fiber yarn. The shape and size of the threading plate match the second groove.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a glue injection device for impregnating resin rubber in a composite material pultrusion molding process, which produces products of higher quality and with less waste of resin rubber.

[0018] The device has a cylindrical impregnation member capable of accommodating resin adhesive. The impregnation member has a first groove, a second groove, and a resin feed pipe connected to the first groove. When impregnating the reinforcing fiber yarn, a continuous production mode is adopted in which the reinforcing fiber yarn is impregnated while the resin is fed. Therefore, excessive resin adhesive is not accumulated in the impregnation member. The mode of impregnating the reinforcing fiber yarn while feeding new resin adhesive also allows the resin adhesive in the impregnation member to be updated extremely quickly, reducing the aging of the resin adhesive, ensuring the stability of the resin adhesive, and thus improving product quality. At the same time, because the resin feed pipe is constantly feeding new resin adhesive, the reflowing resin adhesive squeezed out of the mold entrance cannot flow back into the new resin adhesive and is usually quickly impregnated on the reinforcing fiber yarn and carried out, reducing the waste of resin adhesive. Therefore, the product quality of the device is high and the waste of resin adhesive is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a main perspective view of the utility model;

[0021] Figure 3 It is an exploded view of the utility model;

[0022] Figure 4 This is an exploded view of the present invention from another angle;

[0023] Figure 5 This is a perspective assembly diagram of the wetted part, yarn threading plate, rubber inlet hose and regulating ball valve in the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the wetted part in the present invention;

[0025] Figure 7 This is a schematic diagram of the overall structure of the yarn threading plate in the present invention;

[0026] Figure 8 This is a perspective diagram of the overall structure of the yarn threading plate in the present invention from another angle;

[0027] Figure 9 This is a schematic diagram of the internal structure of the first bushing in the present utility model;

[0028] Figure 10 This is a schematic diagram of the internal structure of the second bushing in the present invention;

[0029] Figure 11 This is a schematic diagram of the internal structure of the yarn drum in the utility model;

[0030] Figure 12 Schematic diagram of the overall structure of the mold in the present invention;

[0031] Figure 13 This is a perspective diagram of the overall structure of the mold of the present invention from another angle;

[0032] The names of the components corresponding to the marks in the above drawings are: 1, wetted part; 101, first groove; 1011, second internal thread; 102, second groove; 1021, third internal thread;

[0033] 2. Yarn passing bobbin; 201. Cylinder body; 202. Circular ring plate;

[0034] 3. Rubber inlet hose; 4. Yarn threading plate;

[0035] 5. First bushing; 501. First external thread; 502. First internal thread;

[0036] 6. Second bushing; 601. Third external thread;

[0037] 7. Gasket; 8. Adjusting ball valve; 9. Second external thread. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] The directional words such as "up", "down", "left", "right", "front", "back", "top", "bottom" etc. mentioned in this utility model are all Figure 2 The directions defined by the cross-shaped orientation mark are used as a reference. All orientation words in this utility model are described based on this definition and do not change the directions they represent when the angle of the figure changes.

[0040] Definitions of relevant terms involved in this utility model:

[0041] (1) Pultruded composites: A high-performance fiber-reinforced polymer (FRP) composite manufactured using a continuous process called pultrusion. Continuous fibers (such as glass or carbon) are pulled through a bath of thermosetting resin (such as epoxy, polyester, or vinyl ester) and then formed into the desired shape using a mold. These shapes primarily include rods, flat sheets, hollow tubes, and profiles. The resin then cures to form a strong, lightweight, and durable composite product.

[0042] (2) Pultrusion: A method for the continuous production of composite materials. This method involves impregnating untwisted glass fiber roving on a creel with a resin compound, passing it through a mold that maintains a certain cross-sectional shape, and allowing it to solidify and form within the mold before being continuously ejected from the mold, thereby forming an automated production process for pultruded products.

[0043] (3) Cylinder: A shape with two parallel and identical faces, which can be divided into cylinders and prisms.

[0044] like Figure 1 As shown, the present invention provides a glue injection device for impregnating a composite material with a resin adhesive in a pultrusion molding process, comprising an impregnation member 1 capable of accommodating the resin adhesive.

[0045] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, a first bushing 5 for removably connecting to the mold is detachably mounted on the end of the impregnation element 1 away from the yarn bobbin 2. The detachable connection is a threaded connection. The first bushing 5 comprises an integrally formed first hexagonal head and an internally and externally threaded tube. The external wall of the internally and externally threaded tube has a first external thread 501, and the internal wall has a first internal thread 502. A second internal thread 1011 is provided in the first groove 101, which mates with the first external thread 501. The mold inlet is provided with a second external thread 9, which mates with the first internal thread 502.

[0046] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, one end of the immersion element 1 is detachably connected to the yarn passing drum 2 via the second bushing 6. The second groove 102 is threadedly connected to the second bushing 6. The second bushing 6 comprises an integrally formed second hexagonal head and an externally threaded tube. The externally threaded tube has a third external thread 601 on its outer wall, and the second groove 102 is provided with a third internal thread 1021 that mates with the third external thread 601. A circular plate 202 is fixedly sleeved on the outer end of the barrel 201 near the immersion element 1. Multiple screw holes are defined in both the circular plate 202 and the second hexagonal head of the second bushing 6. The circular plate 202 and the second hexagonal head of the second bushing 6 are connected by multiple bolts that mate with the screw holes. A gasket 7 is positioned between the second bushing 6 and the circular plate 202.

[0047] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11As shown, a first groove 101 is provided on the bottom surface of the impregnating member 1 close to the mold (away from the yarn tube 2), and a second groove 102 is provided on the bottom surface of the impregnating member 1 close to the yarn tube 2. The bottom of the first groove 101 is connected to the bottom of the second groove 102, and the cross-sectional area of ​​the second groove 102 is larger than the cross-sectional area of ​​the first groove 101. A threading plate 4 is slidably installed in the second groove 102 for the reinforcing fiber yarn to pass through and to evenly distribute the reinforcing fiber yarn. The shape and size of the threading plate 4 match the second groove 102, and the threading plate 4 is perpendicular to the central axis of the impregnating member 1. The cross section of the impregnating member 1, the cross section of the cylinder 201, the cross section of the first groove 101, the cross section of the second groove 102, and the threading plate 4 are all circular structures, and the threading plate 4 is provided with a plurality of parallel horizontal strip holes from top to bottom. The yarn feed drum 2 comprises a cylindrical body 201 with openings on opposite sides. The central axis of the yarn feed drum 2 coincides with the central axis of the impregnating element 1. The end of the yarn feed drum 2 closest to the impregnating element 1 extends into the second groove 102. The impregnating element 1 is provided with a rubber feed pipe 3 connected to the first groove 101. The end of the rubber feed pipe 3, which is remote from the impregnating element 1, is connected to the rubber supply device. The rubber feed pipe 3 is equipped with a regulating ball valve 8 for adjusting the feed rate of the rubber feed pipe 3.

[0048] The working principle of this utility model is as follows: the first external thread 501 and the second internal thread 1011 cooperate to thread the first bushing 5 into the first groove 101. The first internal thread 502 and the second external thread 9 cooperate to thread the first bushing 5 into the mold inlet. Raw tape is wrapped around all threaded connections to protect the threads, reducing the possibility of resin entering the threads through the gaps between the threads, minimizing thread damage and any difficulties in disassembling the device.

[0049] Place the threading plate 4 into the second groove 102. Thread the second bushing 6 into the second groove 102 by engaging the third external thread 601 with the third internal thread 1021. Slide the gasket 7 onto the left end of the barrel 201. Fit the annular plate 202, gasket 7, and second hexagonal head. Align the screw holes of the annular plate 202 with those of the second hexagonal head. Install the bolts, securing the annular plate 202 to the second hexagonal head. (See figure for four countersunk bolts.)

[0050] The left end of the reinforcing fiber yarn is passed through the right end opening of the barrel 201 of the yarn passing barrel 2. After passing through the left end opening of the barrel 201, the left end of the reinforcing fiber yarn enters the second groove 102. The reinforcing fiber yarn is evenly distributed into multiple layers by the yarn feeding plate 4 (three layers in the figure). Gaps are left between each layer of reinforcing fiber yarn to facilitate dipping in glue. The evenly distributed left end of the reinforcing fiber yarn continues to move leftward and enter the first groove 101. It then passes through the first core 5 from the mold entrance into the mold. After passing through the mold, it passes through the mold exit and connects to the traction member that can provide leftward traction for the reinforcing fiber yarn. The yarn feeding is completed.

[0051] When the regulating ball valve 8 is opened, the resin sizing material enters the first groove 101 through the rubber inlet pipe 3 and infiltrates the reinforcing fiber yarn. Simultaneously, the resin sizing material in the first groove 101 gradually flows into the second groove 102. The resin sizing material feed rate can be adjusted by adjusting the opening of the regulating ball valve 8. A small amount of the resin sizing material will enter the barrel 201 due to its own fluidity, but this portion of the resin sizing material will continue to infiltrate the reinforcing fiber yarn that is constantly moving leftward within the barrel 201 and be consumed. This portion of the resin sizing material will generally only appear at the left end of the barrel 201 and will not flow out of the right end. Under the influence of the leftward traction provided by the traction member, the infiltrated reinforcing fiber yarn moves toward the mold entrance, where the excess resin sizing material on the infiltrated reinforcing fiber yarn is squeezed out and then enters the mold cavity. The excess resin sizing material flows back into the first groove 101. Because the capacity of the first groove 101 is much smaller than that of the infiltration tank, this excess resin sizing material will infiltrate the reinforcing fiber yarn again before aging.

[0052] After all the reinforcing fiber yarns are soaked, the device is disassembled and the resin adhesive adhered to the patented tooling is cleaned with a special resin adhesive cleaning agent for the next use.

[0053] It should be noted that the present invention is not limited to the specific structures shown in the drawings in the above embodiments, and various changes can be made thereto within the scope of knowledge possessed by ordinary technicians in this field.

Claims

1. A glue injection device for impregnating a resin sizing material in a composite material pultrusion molding process, characterized in that: It comprises a soaking piece (1) capable of accommodating a resin adhesive, wherein the soaking piece (1) is a columnar structure; One end of the impregnation member (1) is detachably connected to the yarn passing drum (2), and the yarn passing drum (2) comprises a barrel (201) with openings on two opposite sides; A first groove (101) is provided on the bottom surface of the impregnation member (1) away from the yarn passing drum (2), and a second groove (102) is provided on the bottom surface of the impregnation member (1) close to the yarn passing drum (2); the bottom of the first groove (101) is connected to the bottom of the second groove (102), and the cross-sectional area of ​​the second groove (102) is larger than the cross-sectional area of ​​the first groove (101); The immersion member (1) is provided with a rubber inlet pipe (3) connected to the first groove (101).

2. The glue injection device for impregnating a composite material with a resin sizing material for pultrusion molding according to claim 1, characterized in that: The cross section of the immersion member (1), the cross section of the barrel (201), the cross section of the first groove (101), and the cross section of the second groove (102) are all circular structures.

3. The glue injection device for impregnating a composite material with a resin sizing material for pultrusion molding according to claim 2, characterized in that: A first filler (5) for detachably connecting to a mold is detachably mounted on one end of the impregnating member (1) away from the yarn passing drum (2).

4. The glue injection device for impregnating a composite material with a resin sizing material for pultrusion molding according to claim 2, characterized in that: The other end of the impregnating member (1) is detachably connected to the yarn passing drum (2) via a second filling core (6).

5. The glue injection device for impregnating a composite material with a resin sizing material for pultrusion molding according to claim 4, characterized in that: The second groove (102) is threadedly connected to the second bushing (6); an annular plate (202) is fixedly sleeved on the outer side of one end of the cylinder (201) close to the wetted part (1); and the annular plate (202) is bolted to the second bushing (6).

6. The glue injection device for impregnating a resin sizing material for a composite material pultrusion molding process according to claim 5, characterized in that: A gasket (7) is provided between the second bushing (6) and the annular plate (202).

7. A glue injection device for impregnating a resin sizing material for a composite material pultrusion molding process according to any one of claims 1 to 6, characterized in that: The rubber inlet pipe (3) is provided with a regulating ball valve (8) for regulating the feeding amount of the rubber inlet pipe (3).

8. A glue injection device for impregnating a resin sizing material for a composite material pultrusion molding process according to any one of claims 1 to 6, characterized in that: A threading plate (4) for the reinforcing fiber yarn to pass through and capable of evenly distributing the reinforcing fiber yarn is slidably installed in the second groove (102), and the shape and size of the threading plate (4) are matched with the second groove (102).

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