CN107639860B - Fiber impregnation system - Google Patents
Fiber impregnation system Download PDFInfo
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- CN107639860B CN107639860B CN201610576178.XA CN201610576178A CN107639860B CN 107639860 B CN107639860 B CN 107639860B CN 201610576178 A CN201610576178 A CN 201610576178A CN 107639860 B CN107639860 B CN 107639860B
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- 239000000835 fiber Substances 0.000 title claims abstract description 207
- 238000005470 impregnation Methods 0.000 title claims abstract description 88
- 239000003292 glue Substances 0.000 claims abstract description 234
- 238000002347 injection Methods 0.000 claims abstract description 214
- 239000007924 injection Substances 0.000 claims abstract description 214
- 239000011347 resin Substances 0.000 claims abstract description 170
- 229920005989 resin Polymers 0.000 claims abstract description 170
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 24
- 238000001802 infusion Methods 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims description 31
- 239000004744 fabric Substances 0.000 claims description 23
- 238000007790 scraping Methods 0.000 claims description 23
- 238000004382 potting Methods 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
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- 238000000465 moulding Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
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- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000001723 curing Methods 0.000 description 62
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Abstract
The present invention relates to a fibre impregnation system comprising: a. the glue injection box is used for impregnating fibers with resin, and is provided with an inlet end, an outlet end, a cavity for the fibers to pass through and a glue injection box wall for surrounding the cavity, wherein the cavity is connected with the inlet end and the outlet end; the glue injection box is provided with a glue injection hole for injecting resin; a resin runner for resin to flow is arranged inside the glue injection box, and the resin runner is communicated with the cavity and the glue injection port; b. a curing device for curing the resin impregnated fibers, comprising an inlet for the resin impregnated fibers and at least one curing chamber; wherein the inlet of the fiber of the curing device is arranged at a distance from the glue injection box. The fiber infusion system also includes a resin collection device and at least one peristaltic pump.
Description
Technical Field
The invention relates to a fiber impregnation system, which is suitable for manufacturing fiber reinforced composite materials, in particular to a pultrusion process of polyurethane-based fiber reinforced composite materials.
Background
The traditional pultrusion process mainly adopts an open impregnation mode, namely, fibers or fabrics or felts pass through an impregnation tank with a compression roller or a compression rod, and the fibers with resin enter a heated die after being extruded by a pre-formed plate step by step and are solidified. A series of problems exist in the traditional open type gum dipping mode, such as high volatilization of Volatile Organic Compounds (VOC), higher resin waste rate, high finished product porosity and short gelation time, and a resin system is not suitable for the process. The time required to shut down and change product specifications is relatively long and costly.
In order to solve the problems, two types of closed glue injection processes are developed. One type is a low pressure injection method, the cavity inside the injection box usually has one or more tapers, the injection box usually has difficulty in infiltrating the section with the felt or the fabric, and the fabric or the felt is difficult to perform. The other type is a high-pressure glue injection mode, and the glue injection box is claimed to solve the problem, but how to stably control the resin pressure and the resin amount in the resin tank is not disclosed, so that the resin is easily overflowed or the fiber infiltration is poor, and particularly when the machine is stopped or shut down. In actual production, however, shutdown operations occur frequently, and many high-pressure injection molding boxes are difficult to be practically used.
Disclosure of Invention
It is therefore an object of the present invention to overcome the above-mentioned deficiencies of the prior art and to provide a fiber impregnation system that solves both the problems of pre-forming a felt or cloth and the problems of resin bleed or poor fiber wet-out. In addition, the glue injection box is separated from the curing device, so that an operator can conveniently observe the glue impregnation condition between the glue injection box and the curing device to clean redundant burrs at any time, and the infiltration reject ratio is reduced.
In general, the present invention includes the following technical solutions, wherein items 2 to 19 and 21 are preferred embodiments.
1. A fiber impregnation system comprising:
a. the glue injection box is used for impregnating fibers with resin, and is provided with an inlet end, an outlet end, a cavity for the fibers to pass through and a glue injection box wall for surrounding the cavity, wherein the cavity is connected with the inlet end and the outlet end; the glue injection box is provided with a glue injection hole for injecting resin; a resin runner for resin to flow is arranged inside the glue injection box, and the resin runner is communicated with the cavity and the glue injection port;
b. a curing device for curing the resin impregnated fibers, comprising an inlet for the resin impregnated fibers and at least one curing chamber;
wherein the inlet of the fiber of the curing device is arranged at a distance from the glue injection box.
2. A fibre impregnation system as claimed in claim 1, wherein said separation distance is from 10 to 500mm, preferably from 50 to 250 mm.
3. The fiber impregnation system of the foregoing 2, further comprising a resin collection device disposed between the inlet of the fibers of the curing device and the potting compound cartridge such that resin that runs down or drips on the fibers passing through the potting compound cartridge is collected in the resin collection device.
4. A fibre infusion system as claimed in claim 3 further comprising at least one peristaltic pump for pumping resin collected by the resin collection means back to the glue cartridge.
5. The fiber impregnation system of claim 1, wherein the ratio of the cross-sectional areas of the cavities at the bottom end face of the tapered section and the top end face of the tapered section may be in the range of 15: 1 to 1:1, but excluding 1:1, preferably between 10: 1 to 1:1, more preferably 6: 1.
6. the fiber impregnation system of any of the preceding claims 1-5, further comprising a fiber distribution fixture mounted in front of the inlet end of the glue injection cartridge, said fiber distribution fixture comprising yarn holes for fiber passage and/or slits for fiber fabric passage, such that the fibers or fiber fabrics are pre-formed or distributed at the design location according to the design requirements.
7. The fiber impregnation system of claim 6, wherein the contour of the peripheral holes of the yarn holes arranged on the fiber distribution fixture is tangential to the largest outer edge boundary of the cavity at the inlet end of the glue injection cartridge.
8. The fiber impregnation system of claim 6, comprising at least one mandrel entering the potting box through an inlet end of the potting box, exiting the potting box through the molding cavity from an outlet end of the potting box, and continuing into the curing device for forming the molding cavity for the fiber.
9. The fiber impregnation system of claim 8, wherein the fiber distribution fixture further comprises a mandrel hole for the mandrel to pass through, and the yarn holes are arranged around the aperture between the mandrel hole and the inlet cavity of the glue injection cartridge on the fiber distribution fixture, and the minimum outer diameter of the mandrel hole is 0 to 3mm larger than the maximum outer diameter of the mandrel at this location, excluding 0mm, preferably 0.5mm larger.
10. In the fiber impregnation system of claim 9, when there are a plurality of mandrels, at least the next 1 row of openings can be arranged between the mandrels.
11. The fiber impregnation system of claim 1, wherein the cavity of the glue injection box further comprises a first resin collection section connected to an outlet end of the glue injection box, and a backflow hole connected to the peristaltic pump material pipe is formed in a lowest end of the first resin collection section and used for backflow of the collected resin to the glue injection box.
12. The fiber impregnation system of claim 11, wherein the cavity of the glue injection cassette further comprises a parallel section between the conical section and the first resin collection section having a cavity cross-section equal to the conical tip end surface of the conical section, the length of the parallel section being 20-200mm, preferably 20-100 mm.
13. The fiber impregnation system of claim 4, wherein said fiber impregnation system further comprises a doctor device mounted at the inlet of the curing device, having a cavity allowing the fibers or fiber fabric to pass through.
14. The fiber impregnation system of claim 13, wherein said doctor blade means comprises an inlet section for entry of the fibers, an outlet section for exit of the fibers and a second resin collection section, said second resin collection section being disposed outside the inlet section opposite the trough from the outlet section.
15. The fiber impregnation system of claim 14, wherein the outlet section of the glue scraping device is closely connected to the inlet of the fiber of the curing device, and a sealing ring is provided between the glue scraping device and the inlet of the fiber of the curing device to prevent the resin from leaking, and the second resin collecting section of the glue scraping device is connected to the resin collecting tank so that the resin can be collected in the resin collecting tank.
16. The fiber impregnation system according to claim 14, wherein a resin circulation hole is further provided between the inlet section and the outlet section of the frictioning device, and the resin circulation hole is connected to a pump material pipeline on the peristaltic pump and used for introducing the resin in the cavity of the frictioning device into the glue injection box, and meanwhile, a certain degree of negative pressure is generated, so that air bubbles in the resin-impregnated fiber passing through the cavity of the frictioning device are discharged.
17. The fiber impregnation system of claim 13, wherein the size of the inlet section of the doctor blade is 0-2mm, preferably 0-0.5mm, larger than the single edge of the peripheral profile of the fiber-formed profile, and the size of the outlet section is 0.5-8mm, preferably 2-5mm, larger than the single edge of the peripheral profile of the fiber-formed profile.
18. The fiber impregnation system of the foregoing 1, wherein the glue injection box further comprises an observation window, which is located at an inlet end of the tapered section of the glue injection box near the glue injection box, is disposed at the top of the wall of the glue injection box, and is communicated with the cavity of the glue injection box through the wall thickness of the wall of the glue injection box.
19. A fibre impregnation system as claimed in any of the preceding claims 1 to 5, wherein said fibre impregnation system further comprises a positioning means through which the inlets of the fibres of the potting cartridge and curing means are coaxially aligned.
20. A method of fiber impregnation using the fiber impregnation system of any one of claims 1-19, comprising the steps of:
the fiber enters the glue injection box;
injecting resin into the resin runner through the glue injection hole to fill the resin runner into a cavity of the glue injection box and to impregnate the fiber passing through the glue injection box;
feeding fiber fabric or other sheet materials at the axial interval between the outlet end of the glue injection box and the inlet of the fiber of the curing device;
the fibers are cured in a curing device.
21. Fiber impregnation as in the previous 20, further comprising a resin recovery step.
It is to be understood that the curing device may be a single die having an inlet and an outlet or a curing device having only an inlet or refer to a curing molding system suitable for pultrusion of cured fibers. When the curing device is a die having an inlet and an outlet, the cured resin-impregnated fiber is led out from the outlet of the die, and when the curing device has only an inlet, it can be applied to a fiber curing method such as winding. Taking a mold with an inlet and an opening as an example, in the fiber impregnation system of the invention, the bottom of the glue injection box is provided with a bracket connected with a support rail connected with the bottom of the mold. The method comprises the steps of guiding fibers into a glue injection box, injecting resin into a resin runner through a glue injection hole to fill the resin runner into a cavity of the glue injection box, then impregnating the fibers passing through the glue injection box, feeding fiber fabrics or other sheet materials at an axial interval between an outlet end of the glue injection box and an inlet of the fibers of a curing device, and then curing the fibers in the curing device. The glue injection box can slide back and forth on the support rail and keep being separated from the mould, so that the felt or the fabric can be conveniently fed from the inlet of the mould or the inlet of the outlet plate at the front end of the mould, and the phenomenon that the felt or the fabric is folded in the tapered glue injection box to influence the felt adding quality is avoided. In addition, because the glue injection box can slide back and forth on the support rail and keep separating from the mould, an operator can observe and monitor the dipping condition finished by the glue injection box between the outlet of the glue injection box and the mould, so that the operator can find the dipping problems including insufficient dipping, redundant burrs and the like in time, and solve the problems before entering the mould for curing, thereby improving the efficiency and reducing the wetting defective rate. The outlet end of the glue injection box is provided with a resin collecting plate and a resin backflow hole, and the resin is collected into a buffer bottle or other containers or is directly conveyed into the glue injection box by a peristaltic pump, so that the resin waste is avoided.
Drawings
The invention may be better understood by reference to the following drawings in conjunction with the following non-limiting exemplary embodiments, in which like reference numerals indicate like parts or features. It should be understood that the figures are non-limiting, are not necessarily drawn to scale, and that some features may not be shown or labeled based on the limitations of the figures. In the drawings:
FIG. 1 is a schematic perspective view of a fiber impregnation system according to the present invention;
FIG. 2 is a front view of the glue injection cartridge with the mandrel;
FIG. 3 is a perspective view of the glue injection cartridge with a mandrel;
FIG. 4 is a cross-sectional view of a glue cartridge according to the present invention;
FIG. 5 is a perspective view of a fiber distribution fixture of the fiber impregnation system according to the present invention;
FIG. 6 is a perspective view of a doctor blade of a fiber impregnation system according to the present invention;
FIG. 7 is a front and cross-sectional view of the squeegee assembly of FIG. 6;
FIG. 8 is a perspective view of FIG. 6 with a resin collection tank;
FIG. 9 is a schematic perspective view of a resin collection tank;
FIG. 10 is a front view and a cross-sectional view of the resin collection tank of FIG. 9; and
figure 11 is a schematic view of a peristaltic pump/collection device connection.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. It is to be understood that the following embodiments are illustrative only and are not limiting of the invention. The scope of the invention is defined by the claims. It should also be understood that not all of the features of the embodiments described below need be included in the practice of the present invention, and that various combinations of these features are possible.
In the present invention, "truncated cone shape" refers to a portion of a cone shape that is left by cutting off the tip of the cone shape in a direction parallel to the bottom end of the cone shape (i.e., the other end opposite to the tip); the end with the larger cross-sectional area is defined as the bottom end face of the tapered section, and the end with the smaller cross-sectional area is defined as the top end face of the tapered section.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships indicated in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the illustrated devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention.
A fiber impregnation system comprising:
a. the glue injection box is used for impregnating fibers with resin, and is provided with an inlet end, an outlet end, a cavity for the fibers to pass through and a glue injection box wall for surrounding the cavity, wherein the cavity is connected with the inlet end and the outlet end; the glue injection box is provided with a glue injection hole for injecting resin; a resin runner for resin to flow is arranged inside the glue injection box, and the resin runner is communicated with the cavity and the glue injection port;
b. a curing device for curing the resin impregnated fibers, comprising an inlet for the resin impregnated fibers and at least one curing chamber;
wherein the inlet of the fiber of the curing device is arranged at a distance from the glue injection box. Wherein the separation distance is 10 to 500mm, preferably 50 to 250 mm.
According to a preferred embodiment of the invention, the fibre impregnation system further comprises a resin collection device arranged between the inlet of the fibres of the curing device and the infusion box, such that resin flowing down or dripping down on the fibres passing through the infusion box is collected in the resin collection device. The resin collection means may be a buffer bottle or any other container for collecting resin. It should be understood that the number of buffer bottles or other containers may be one or more.
According to a preferred embodiment of the invention, the fibre impregnation system further comprises at least one peristaltic pump for pumping the resin collected by the resin collection device back to the glue cartridge, so as to reduce resin waste and increase resin utilization. It will be appreciated that the above-described resin collection means, such as a buffer bottle, is not necessary and the recovered resin may be directly transferred back into the gel magazine by a peristaltic pump without being stored in the buffer bottle.
Alternatively, the ratio of the cross-sectional areas of the cavities at the bottom end face of the tapered section and the top end face of the tapered section may be in the range of 15: 1 to 1:1, but excluding 1:1, preferably between 10: 1 to 1:1, more preferably 6: 1.
according to an embodiment of the invention, the fiber impregnation system further comprises a fiber distribution fixture which is arranged in front of the inlet end of the glue injection box, the fiber distribution fixture comprises yarn holes for fiber to pass through and/or strip seams for fiber fabric to pass through, so that the fiber or the fiber fabric is preformed or distributed at the designed position according to the design requirement.
According to an embodiment of the present invention, the fiber impregnation system may further comprise at least one mandrel, which may enter the injection box through an inlet end of the injection box, exit the injection box through the molding cavity from an outlet end of the injection box, and may continue into the curing device for forming the molding cavity of the fiber. It should be understood that a mandrel is not required, but is merely a preferred embodiment for forming the desired fabric.
Preferably, the fiber distribution fixing device further comprises a mandrel hole for the mandrel to pass through, and the yarn holes are arranged on the fiber distribution fixing device around the hole between the mandrel hole and the cavity at the inlet end of the glue injection box. The fiber distribution fixture has a guiding effect on the fibers and/or the mandrel.
According to one embodiment of the invention, the contour of the peripheral hole of the yarn holes arranged on the fiber distribution fixing device is tangent to the maximum outer edge boundary of the cavity at the inlet end of the glue injection box, and the minimum outer diameter of the mandrel hole is 0 to 3mm larger than the maximum outer diameter of the mandrel at the position, excluding 0mm, and preferably 0.5 mm. When there are several mandrels, at least the next 1 row of yarn holes can be arranged between the mandrels.
Preferably, the cavity of the glue injection box further comprises a first resin collection section connected with the outlet end of the glue injection box, and the bottommost end of the first resin collection section is provided with a backflow hole connected with a pipeline of the peristaltic pump and used for enabling collected resin to flow back into the glue injection box.
Optionally, the cavity of the glue injection box further comprises a parallel section, the parallel section is located between the conical section and the first resin collection section and has a cavity cross section equal to the conical bottom end surface of the conical section, and the length of the parallel section is 20-200mm, preferably 20-100 mm.
According to one embodiment of the invention, the fibre impregnation system further comprises a glue scraping device, mounted at the inlet of the curing device, having a cavity allowing the fibres or fibre fabric to pass through. The frictioning device includes the export section and the second resin collection section that the entry section, the fibre that get into wore out, the second resin collection section sets up in the outside relative with the export section of entry section.
In addition, the glue scraping device is closely connected with the inlet of the fiber of the curing device, and a sealing ring is arranged between the glue scraping device and the inlet of the fiber of the composite material curing device to prevent the resin from leaking.
Preferably, the fibre impregnation system further comprises a resin collection tank connected to the other end of the frictioning device opposite the curing device, i.e. a second resin collection section, so that resin can be collected in the resin collection tank and the collected resin is conveyed through a conduit to a peristaltic pump for recycling. It should be understood that the resin collection tank shown herein is one of the resin collection vessels, and other forms may be used.
Preferably, a resin circulation hole is further formed between the inlet section and the outlet section of the glue scraping device, the resin circulation hole is connected with a pump material pipeline on the peristaltic pump and used for guiding resin in a cavity of the glue scraping device into the glue injection box, and meanwhile, a certain degree of negative pressure is generated, so that air bubbles in the resin-impregnated fibers passing through a cavity of the glue scraping device are discharged.
Wherein the size of the inlet section of the frictioning device is 0-2mm, preferably 0-0.5mm larger than the single edge of the peripheral profile of the fiber-formed profile, and the size of the outlet section of the frictioning device is 0.5-8mm, preferably 2-5mm larger than the single edge of the peripheral profile of the fiber-formed profile.
According to one embodiment of the invention, the glue injection box further comprises an observation window, the observation window is positioned at the inlet end of the conical section of the glue injection box, which is close to the glue injection box, is arranged at the top of the wall of the glue injection box, and penetrates through the wall thickness of the wall of the glue injection box to be communicated with the cavity of the glue injection box. The observation window can be in any shape such as rectangle, circle or ellipse, and the operator can observe the liquid level height of the resin in the cavity of the glue injection box through the observation window.
According to an embodiment of the invention, the fiber impregnation system further comprises a positioning device, and the inlets of the fibers of the glue injection box and the curing device are coaxially aligned through the positioning hole.
According to the fiber impregnation method of the present invention, preferably, the fiber impregnation method further comprises a resin recovery step. The resin recovery step utilizes a peristaltic pump to convey the resin collected at the glue injection box and the glue scraping device back to the glue injection box through a conduit so as to realize the recycling of the resin.
According to an embodiment of the invention, the glue cartridge further comprises an upper reinforcement plate and a lower reinforcement plate, wherein the upper reinforcement plate and the lower reinforcement plate are attached to an upper wall and a lower wall of the glue cartridge wall, respectively. The upper reinforcing plate is attached to the upper wall of the glue injection box, and hole distribution corresponding to the glue injection holes and the mounting holes is arranged on the upper reinforcing plate so as to enhance the rigidity of the upper wall of the glue injection box and prevent the glue injection box from deforming due to the pressure inside the glue injection box. The lower reinforcing plate is attached to the lower wall of the glue injection box and is provided with a U-shaped groove, so that the position of the glue injection box can be conveniently adjusted up, down, left and right while the rigidity is enhanced.
According to an embodiment of the invention, the fiber impregnation system further comprises a positioning device, such as a positioning pin, through which the inlets of the fibers of the glue cartridge and the curing device can be coaxially aligned.
A fiber impregnation system according to one embodiment of the present invention is further described below with reference to fig. 1-11, wherein the curing device is generally a die having an inlet and an outlet.
Fig. 1 shows a perspective view of a fibre impregnation system according to the invention, as shown in fig. 1, the fibre impregnation system 01 comprising: the device comprises a glue injection box 1, a glue scraping device 2, a curing device 3, a fiber distribution fixing device 4, a mandrel 5, a peristaltic pump 6 and a resin collecting tank 7. The mandrel 5 passes through the fiber distribution fixture 4 into the glue injection box 1, passes through the glue injection box 1 and enters the curing device 3 via the glue scraping device 2. The mandrel 5 and the fiber distribution fixture 4 are not essential and are preferred embodiments for forming the desired fibrous web product. The glue injection box 1 is installed on a bracket system 9, the curing device 3 is installed on the bracket system 9 through a supporting plate at the bottom of the glue injection box, and the glue injection box 1 can slide back and forth on a supporting rail of the bracket system 9 and is kept separated from the curing device 3. The relative position of the glue injection box 1 and the curing device 3 can be adjusted by an adjusting device such as an adjusting screw arranged on the support system or the support rail so as to achieve that the outlet end of the glue injection box is coaxial and consistent with the inlet of the fiber of the curing device, and the positioning device can be at least one positioning pin, a sliding groove and other methods which can be thought of by experienced persons in the industry. The fiber is impregnated in a glue injection box and then cured in a curing device through a glue scraping device.
Generally, the length of the glue injection box is 100mm-1000mm, the specific length is related to the specification of the section bar, in this embodiment, a glue injection box with the length of 650mm is preferably adopted, in addition, the wall thickness of the glue injection box is about 10mm-120mm, the specific thickness is related to the design of a curing device and the complexity of the section bar, and in this embodiment, a glue injection box with the wall thickness of 30mm is preferably adopted.
The structure of the glue injection cartridge in the present embodiment is described in detail below with reference to fig. 2 to 4. Fig. 2 is a front view of the glue injection box 1 with the mandrel 5, and as can be seen from fig. 3, the mandrel 5 enters the cavity of the glue injection box 1 from the inlet end of the glue injection box, the inlet end of the glue injection box 1 generally has a fillet, the radius of the fillet ranges from 2mm to 50mm, and preferably ranges from 3mm to 6 mm.
The injection molding box 1 is generally made of metal such as ANK80 mold steel/P20 mold steel, but the design of plastic or plastic and metal combination is not excluded, and especially when rapid proofing is required, the injection molding box is made of plastic such as UHMPE. Specifically, the glue injection cartridge 1 is composed of a tapered section 11, a parallel section 12, and a first resin collection section 13. The conical section 11 starts from the inlet end of the glue injection box 1, the cavity extends in the axial direction of the glue injection box in a conical manner to form a conical section bottom end face and a conical section top end face with an area smaller than that of the conical section bottom end face, wherein the area ratio of the conical section bottom end face to the conical section top end face can be 15: 1 to 1:1, preferably in the range between 10: 1 to 1:1, the area ratio of the conical section bottom end face to the conical section top end face is selected to be 6:1, and further, the tapered section forms a taper angle with the central plane of 0.1 ° to 20 °, preferably 0.1 ° to 3 °, and further preferably 0.5 ° to 1.5 °. At least one glue injection ring is arranged on the conical section part, the glue injection ring is arranged inside the glue injection box, and the shape of the glue injection boxAn annular glue injection flow channel 14 is formed on the peripheral wall of the cavity, the width of the cross section of the glue injection flow channel can be 3mm to 200mm, preferably 5mm to 16mm, and the depth of the glue injection flow channel is 3mm to 50mm, preferably 4mm to 15 mm. Cross-sectional shapes include, but are not limited to, semi-circular, drop-shaped, trapezoidal, prismatic, irregular polygonal, and the like. In the present embodiment, it is further preferable to employ
Semicircular glue injection flow channels. In addition, the glue injection runner can be arranged on the inner wall of the cavity of the glue injection box and is annularly distributed along the axial direction of the inner wall of the cavity of the glue injection box. The glue injection box 1 is provided with a glue injection hole 15 in the conical section for injecting resin, the glue injection hole 15 penetrates through the wall of the glue injection box and is communicated with the glue injection runner 14, the position of the glue injection hole 15 can be any position on the wall of the glue injection box, the communication with the glue injection runner 14 is realized through drilling, preferably, the glue injection hole 15 is positioned at any position on the cross section of the annular resin runner, and more preferably, the upper part of the glue injection box 1 of the glue injection hole 15 takes the cross section of the center line of the annular resin runner close to the outlet of the glue injection box as the center line. In the present embodiment, as shown in fig. 4, the glue injection hole is located 400mm away from the inlet of the glue injection cartridge and in the middle of the resin runner. According to the complexity of the product, the number of the glue injection holes can be more than one, preferably, the distance between the glue injection holes is 30mm to 200mm, preferably 80 mm to 150mm, and the glue injection holes are formed in the upper and lower opposite positions of the resin flow channel. The diameter of the glue injection hole is 2mm to 30mm, and the diameter is preferably 2mm to 30mm
The glue injection hole is connected and sealed to the glue injection tube by internal threads and other connection and sealing means known to those skilled in the art. Preferably, the rubber injection pipe is connected with the rubber injection pipe in an internal thread mode. And the resin in the glue injection pipe enters the resin flow channel through the glue injection hole so as to enter the inside of the glue injection box.
The parallel section 12 is arranged to continue next to the conical section tip face of the conical section 11 and to extend with equal cross-section with the conical section tip face as cross-section, i.e. with equal cross-section throughout the length of the parallel section 12. The parallel section 12 may be used to maintain the impregnation pressure and scrape off excess resin. The first resin collecting section 13 continues next to the parallel section 12, on the outlet end side of the glue injection cassette 1, wherein the first resin collecting section 13 is provided with a resin return hole 16 for leading out resin, in order to collect resin into a buffer bottle or other container or to extract resin in the buffer bottle or in a conduit into the glue injection cassette using a peristaltic pump. It will be appreciated that a buffer bottle is not necessary and a peristaltic pump may directly deliver the resin to the gel-filling box. Preferably, a resin collection plate is attached at the outer end face of the first resin collection section at the outlet end of the glue injection box to prevent leakage of resin.
In the present embodiment, as an illustrative illustration (not intended to limit the scope of the present invention), the length of the taper section is 600mm, the length of the parallel section is 30mm, and the length of the first resin collection section is 20 mm. In addition, preferably, the glue injection box 1 is further provided with an observation window 17, which is located at a position 25mm away from the inlet end of the glue injection box and is shaped into a rectangle and extends along the axial direction on the upper wall of the glue injection box, the observation window 17 is communicated with the cavity inside the glue injection box 1, and the length of the observation window is generally 100-300mm, preferably 150-300 mm. In this embodiment, the length of the observation window is 275 mm. An operator can detect the resin injection condition in the glue injection box by means of the observation window, wherein the resin injection condition comprises the injection height, the injection speed and the like. It is to be understood that the shape of the viewing window may be elliptical, rectangular, etc. In addition, a cover may also be provided for the viewing window to prevent moisture and the like from entering the interior of the gel-filled cartridge.
It should be noted that, in the illustrated embodiment, for convenience of description, the glue injection box 1 is regarded as an integrally formed structure, but in practical application, for convenience of cleaning, the glue injection box is generally at least 2, and the 2 structures are connected with each other to form the glue injection box, where the specific number of the pieces is related to the complexity of the product. For example, the glue injection box has an upper mold and a lower mold, and the upper mold and the lower mold are fixed by screws or bolts, thereby forming a glue injection box. In practical application, the method is generally adopted
To
The screw may be a hexagon socket, or may be a hexagon.
Referring again to fig. 1, and to the schematic view of the fiber distribution fixture shown in fig. 4, the fiber distribution fixture 4 is installed at the entrance of the injection molding box 1, the fiber distribution fixture 4 has a plurality of yarn holes 41 and a reserved spindle hole 42, the yarn holes 41 are distributed around the spindle hole 42 for yarn to pass through, the diameter of the yarn holes is generally 3 to 8mm, preferably 4 to 6mm, and the two ends of the yarn holes have rounded corners R1 to R5mm, preferably R1 to R3 mm. Wherein the outline of the peripheral hole of the yarn holes 41 arranged on the fiber distribution fixing device 4 is tangent with the maximum outer edge boundary of the cavity at the inlet end of the glue injection box 1. Furthermore, the minimum outer diameter of the mandrel bore 42 in the fibre distribution fixture 4 is 0 to 3mm, preferably 0.2-2mm, larger than the maximum outer diameter of the mandrel at this location. Preferably, the apertures of the fibre distribution fixture are typically 5mm in diameter and the number of yarns in each aperture is 2 to 4 4800Tex, but it is not recommended to arrange 4 4800Tex yarns in series, the number of yarns being calculated by the formula 0.3552 4800Tex yarns per square mm. The mandrels are conical in the glue injection box, and when a plurality of mandrels exist, at least the lower 1 row of yarn holes can be arranged between the mandrels.
In addition, a yarn guide plate (not shown) is usually mounted at the inlet end of the glue injection box, and the distribution of yarn holes of the yarn guide plate is the same as that of the yarn holes of the fiber distribution fixing device, and is related to the complexity of the product, and the outline of the yarn guide plate is tangential to the outline of the cavity at the position of the yarn guide plate in the glue injection box.
In addition, the inlet of the curing device 3 is provided with a glue scraping device 2 which plays a role of assisting in immersing and collecting excess resin. The frictioning device 2 comprises three parts: a small size inlet section 21 and a larger size outlet section 22 and a second resin collection section 24 located outside the inlet section. The size of the inlet section is generally 0-2mm, preferably 0-0.5mm larger than the single side of the product profile, and the outlet section, i.e. the section in contact with the inlet of the curing device, is generally 3-8mm, preferably 4-6mm larger than the single side of the product profile, wherein the transition between the outlet and the inlet is a positive and a negative arc. The glue scraping device is connected with the curing device, and one surface of the glue scraping device, which is in contact with the curing device, is provided with a sealing ring groove to prevent resin from leaking. And a resin circulation hole 26 is further arranged between the inlet section 21 and the outlet section 22 of the glue scraping device and penetrates through the upper wall thickness of the glue scraping device, the resin circulation hole is connected with a pump material pipeline on the peristaltic pump and is used for guiding resin in a cavity of the glue scraping device into the glue injection box, and meanwhile, negative pressure of a certain degree is generated, so that air bubbles in the resin-impregnated fibers passing through the cavity of the glue scraping device are discharged. . Resin collecting tank 7 is installed in the outside of frictioning device's second resin collection section, is provided with resin collecting hole 25 in the resin collecting tank 7 for utilize peristaltic pump recycle with unnecessary resin, pour into the injecting glue box again. Additionally, it should be understood that the resin in the resin collection tank may also be directed into a buffer bottle or other container. Preferably, the resin enters the gel injection box through the resin collection hole through the observation window of the gel injection box at the backflow hole of the peristaltic pump.
According to the fiber impregnation system, fibers are impregnated in the glue injection box and then enter the curing device through the glue scraping device, and are cured in the curing cavity of the curing device. Because the glue injection box can slide back and forth on the supporting rail and keep being separated from the curing device, the felt or the fabric can be fed from the inlet of the curing device or the inlet of the glue scraping device at the front end of the curing device, and is not required to be fed at the inlet of the glue injection box, so that the phenomenon that the felt or the fabric is folded in the tapered glue injection box to influence the felt adding quality is avoided. In addition, because the glue injection box can slide back and forth on the support rail and keep separating from the curing device, an operator can observe and monitor the dipping condition finished by the glue injection box between the outlet of the glue injection box and the curing device, so that the operator can find the dipping problems including insufficient dipping, redundant burrs and the like in time, and solve the problems before entering the curing device for curing, thereby improving the efficiency and reducing the wetting defective rate. In addition, the operator can also decide whether to carry out felting or fabric addition according to the impregnation condition observed between the glue injection box and the curing device. The outlet end of the glue injection box is provided with a resin collecting plate and a resin collecting hole, and the resin is collected into a buffer bottle or other containers or is extracted into the glue injection box by a peristaltic pump, so that the resin waste can be avoided.
Preferably, the glue injection cassette of the fiber impregnation system of the present invention further comprises an upper reinforcement plate 18 and a lower reinforcement plate 19. The upper reinforcing plate 18 is attached to the upper wall of the glue injection box, and holes corresponding to the glue injection holes and the mounting holes are distributed on the upper reinforcing plate to enhance the rigidity of the upper wall of the glue injection box and prevent deformation of the glue injection box caused by pressure inside the glue injection box. Lower reinforcing plate 19 is attached to the injecting glue box lower wall, and it sets up to have U type groove, conveniently adjusts injecting glue box position from top to bottom, left and right sides when strengthening the rigidity.
Preferably, the fiber impregnation system of the present invention further comprises a support plate 10 mounted to the rack system, the support plate 10 being provided with yarn holes and mandrel holes corresponding to the yarn holes and mandrel holes of the fiber distribution fixture, similar to the fiber distribution fixture, for supporting the mandrels and holding the yarns.
Preferably, the fiber impregnation system of the present invention further comprises a stop device to prevent the glue cartridge from exceeding the maximum travel range.
Preferably, the fiber impregnation system of the present invention further comprises a positioning device, such as a positioning pin, passing through the positioning hole for positioning the potting cartridge, the curing device, the glue spreading device and the fiber dispensing fixture.
The fiber impregnation system further comprises a peristaltic pump, and resin in the buffer bottle is extracted into the glue injection box through the extrusion rotation of the peristaltic pump.
Compared with the prior art, the invention has the following advantages:
the fiber impregnation system adopts the glue injection box to be separated from the curing device, and is provided with the resin collecting device, so that the problem of preforming of the felt or the fabric can be well solved, and meanwhile, the resin is saved to the maximum degree.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes, modifications, substitutions and alterations can be made thereto without departing from the technical spirit and scope of the invention as defined in the appended claims.
Claims (29)
1. A fiber impregnation system comprising:
a. the glue injection box is used for impregnating fibers with resin, and is provided with an inlet end, an outlet end, a cavity for the fibers to pass through and a glue injection box wall for surrounding the cavity, wherein the cavity is connected with the inlet end and the outlet end; the glue injection box is provided with a glue injection hole for injecting resin; a resin runner for resin to flow is arranged inside the glue injection box, and the resin runner is communicated with the cavity and the glue injection hole;
b. a curing device for curing the resin impregnated fibers, comprising an inlet for the resin impregnated fibers and at least one curing chamber;
the fiber inlet of the curing device is arranged at a distance from the glue injection box, and the bottom of the glue injection box is provided with a bracket connected with a support rail at the bottom of the curing device.
2. The fiber impregnation system of claim 1, wherein the inlet of the fibers of the curing device is spaced from the potting compound cartridge by a distance of 10 to 500 mm.
3. The fiber impregnation system of claim 2, wherein the inlet of the fibers of the curing device is spaced from the potting compound cartridge by a distance of 50 to 250 mm.
4. The fiber infusion system of claim 1, further comprising a resin collection device disposed between the inlet of the fibers of the curing device and the infusion box such that resin flowing or dripping down the fibers passing through the infusion box is collected in the resin collection device.
5. The fiber infusion system of claim 4, further comprising at least one peristaltic pump for pumping resin collected by the resin collection device back to the glue cartridge.
6. The fiber impregnation system of claim 1, wherein the ratio of the cross-sectional area of the cavity at the bottom end face of the tapered section to the cross-sectional area of the cavity at the top end face of the tapered section is in the range of 15: 1 to 1:1, but excluding 1: 1.
7. The fiber impregnation system of claim 6, wherein the ratio of the cross-sectional area of the cavity at the bottom end face of the tapered section to the cross-sectional area of the cavity at the top end face of the tapered section is in the range of 10: 1 to 1:1, in the range between.
8. The fiber impregnation system of claim 7, wherein the ratio of the cross-sectional area of the cavities at the bottom end face of the tapered section and the top end face of the tapered section is 6: 1.
9. The fiber impregnation system of any of claims 1-8, further comprising a fiber distribution fixture mounted in front of the inlet end of the potting compound cartridge, the fiber distribution fixture including yarn holes for fiber passage and/or slits for fiber fabric passage, such that the fibers or fiber fabric are pre-formed or distributed at a design location as desired.
10. The fiber impregnation system of claim 9, wherein the peripheral apertures of the array of yarn apertures in said fiber distribution fixture have a contour that is tangential to the largest peripheral boundary of the cavity at the entrance end of the compound injection cartridge.
11. The fiber impregnation system of claim 9, comprising at least one mandrel entering the potting box through an inlet end of the potting box, exiting the potting box through the molding cavity from an outlet end of the potting box, and continuing into the curing device for forming the molding cavity for the fiber.
12. The fiber impregnation system of claim 11, wherein the fiber distribution fixture further comprises a mandrel bore for the mandrel to pass through, and the yarn holes are arranged on the fiber distribution fixture around the aperture between the mandrel bore and the glue injection cartridge inlet cavity, and the minimum outer diameter of the mandrel bore is 0 to 3mm greater than the maximum outer diameter of the mandrel at that location, excluding 0 mm.
13. The fiber impregnation system of claim 12, wherein the minimum outer diameter of said mandrel hole is 0.5mm greater than the maximum outer diameter of the mandrel at that location.
14. The fiber impregnation system of claim 12, wherein when there are a plurality of mandrels, at least the next 1 row of yarn openings can be arranged between the mandrels.
15. The fiber impregnation system of claim 1, wherein the cavity of the potting compound box further comprises a first resin collection section connected to the outlet end of the potting compound box, and the lowest end of the first resin collection section is provided with a backflow hole connected to a peristaltic pump material pumping pipeline for backflow of the collected resin into the potting compound box.
16. The fiber impregnation system of claim 15, wherein the cavity of the glue injection cartridge further comprises a parallel section between the tapered section and the first resin collection section having a cavity cross-section equal to the tapered section cone apex face, the parallel section having a length of 20-200 mm.
17. The fiber impregnation system of claim 16, wherein said parallel section has a length of 20-100 mm.
18. The fiber impregnation system of claim 1, wherein said fiber impregnation system further comprises a glue scraping device mounted at an inlet of the curing device, having a cavity allowing the fibers or fiber fabric to pass through.
19. The fiber impregnation system of claim 18, wherein the doctor device includes an inlet section into which the fibers enter, an outlet section from which the fibers exit, and a second resin collection section disposed outside of the inlet section opposite the outlet section.
20. The fiber impregnation system of claim 19, an outlet section of said doctor blade being in close communication with an inlet of the fibers of said curing device, and a seal being provided between the doctor blade and the inlet of the fibers of the curing device to prevent leakage of resin, a second resin collection section of said doctor blade being in communication with a resin collection tank so that resin can be collected therein.
21. The fiber impregnation system of claim 19, wherein a resin circulation hole is further provided between the inlet section and the outlet section of the frictioning device, the resin circulation hole is connected to a pump material pipeline on the peristaltic pump and used for guiding the resin in the cavity of the frictioning device into the glue injection box, and a certain degree of negative pressure is generated at the same time, so that air bubbles in the resin-impregnated fiber passing through the cavity of the frictioning device are discharged.
22. The fiber impregnation system of claim 18, wherein the size of the inlet section of said doctor blade is 0-2mm larger than a single edge of the peripheral profile of the fiber-formed profile.
23. The fiber impregnation system of claim 22, wherein the size of the inlet section of said doctor blade is 0-0.5mm larger than a single edge of the peripheral profile of the fiber-formed profile.
24. A fibre impregnation system according to claim 22 or 23, wherein the outlet section is 0.5-8mm larger than a single edge of the peripheral profile of the fibre-formed profile.
25. The fiber impregnation system of claim 24, wherein the outlet section is 2-5mm larger than a single edge of the peripheral profile of the fiber-formed profile.
26. The fiber impregnation system of claim 1, the glue injection box further comprising an observation window located at an inlet end of the tapered section of the glue injection box near the glue injection box, disposed at a top of the wall of the glue injection box, the wall thickness penetrating the wall of the glue injection box communicating with the cavity of the glue injection box.
27. The fiber impregnation system of any of claims 1-8, wherein the fiber impregnation system further comprises a positioning device through which the inlet of the fibers of the potting box, curing device, are coaxially aligned.
28. A method of fibre impregnation using a fibre impregnation system as claimed in any one of claims 1 to 27, comprising the steps of:
the fiber enters the glue injection box;
injecting resin into the resin runner through the glue injection hole so that the resin is filled in the resin runner, enters a cavity of the glue injection box and is impregnated in the fiber passing through the glue injection box;
feeding fiber fabric or other sheet materials at the axial interval between the outlet end of the glue injection box and the inlet of the fiber of the curing device;
the fibers are cured in a curing device.
29. The fiber impregnation method of claim 28, further comprising a resin recovery step.
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| CN109397715B (en) * | 2018-11-28 | 2020-09-29 | 苏州久美玻璃钢股份有限公司 | Automatic glue collecting equipment of one set of winding machine |
| WO2020107241A1 (en) * | 2018-11-28 | 2020-06-04 | 苏州久美玻璃钢股份有限公司 | Automatic glue collecting devices of winding machine |
| CN110142987A (en) * | 2019-05-15 | 2019-08-20 | 湖州守真新材料科技有限公司 | A kind of pultrusion die for Material cladding |
| CN110253908A (en) * | 2019-05-27 | 2019-09-20 | 湖州守真新材料科技有限公司 | A kind of anti-clogging pultrusion die and composite material and production method for composite material |
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| JPS57181825A (en) * | 1981-04-03 | 1982-11-09 | Furukawa Electric Co Ltd:The | Manufacture of fiber-reinforced plastic filament |
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