Manufacturing method of fibrofelt for automatic prime coat equipment and fibrofelt

Abstract

The invention relates to a manufacturing method of a fibrofelt for automatic prime coat equipment and the fibrofelt, and the manufacturing method of the fibrofelt comprises the following steps: 1, opening and disorderly carding chemical fiber short fibers A with the diameter of 19-25 microns to form a thin fiber web B with the weight of 20-40 g / m < 2 >; secondly, the multiple layers of thin fiber webs B are laid in parallel and subjected to needling reinforcement, and fiber webs are obtained; thirdly, the fiber web is laid to obtain a multi-layer fiber web, then the multi-layer fiber web is reinforced, and a fiber felt block with the volume density being 0.2-0.3 g / cm < 3 > is obtained; and 4, according to the requirements of automatic prime coat equipment, carrying out module processing on the fibrofelt blocks to obtain the fibrofelt with a specific shape and specification. Therefore, the fibrofelt manufactured by the design has better porosity and better uniformity of coating thickness and width.

Description

Technical Field

[0001] The invention relates to a method for manufacturing a fiber felt and the fiber felt, belonging to the technical field of textiles, and in particular to a method for manufacturing a fiber felt for automatic primer coating equipment and the fiber felt. Background Art

[0002] Automatic primer equipment is an automated equipment used to apply glue or primer on the surface of an object. Automatic primer equipment is used in automobile manufacturing, solar panel production, electronic manufacturing and other industries because it can replace manual application, has good and stable coating effect and high work efficiency. In the automatic application process of the automatic primer equipment, a brush made of wool or wool felt is usually used for primer. Since the chemical resistance of wool felt is general, it is easy to solidify and fall off during contact with the primer, resulting in a limited coating length. In addition, because the wool fibers are uneven in length and contain impurities, the manufacturing process is complicated, resulting in poor porosity of the wool felt, which easily causes uneven coating width and thickness. Therefore, it is necessary to make a fiber felt with good porosity for automatic primer equipment, so that the coating length is longer and the uniformity of coating thickness and width is improved.

[0003] The Chinese patent application with application number 202323282080.8 and application date December 1, 2023 discloses a primer system and a primer equipment for quickly replacing the primer head, including: a primer tank for storing primer; a cleaning tank for storing detergent; a cleaning primer gun, which includes a mounting seat, a cleaning head and a primer head for spatial movement, and the cleaning head and the primer head are arranged at intervals below the mounting frame, and the primer head includes a primer seat connected to the bottom of the spline and a chemical fiber felt arranged on the primer seat; a peristaltic pump group, which includes a primer peristaltic pump and a cleaning peristaltic pump, the primer tank, the primer peristaltic pump and the cleaning primer gun are connected in sequence to form a primer circulation loop, and the cleaning tank, the cleaning peristaltic pump and the cleaning primer gun are connected in sequence to form a detergent circulation loop; a quick change mechanism, which is used to replace the cleaning head and the primer head; an anti-drying mechanism, which is used to keep the primer head moist. Although this patent can conveniently, stably and quickly replace the primer head to improve the continuity of the coating length, it still has the following defects: The felt porosity of this design is poor, resulting in poor uniformity in coating thickness and width.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects and problems of the prior art that the felt has poor porosity, resulting in poor uniformity of coating thickness and width, and to provide a method for producing a fiber felt for automatic primer equipment and a fiber felt having better porosity and better uniformity of coating thickness and width.

[0006] To achieve the above objectives, the technical solution of the present invention is: a method for manufacturing a fiber felt for an automatic primer coating device and a fiber felt, wherein the method for manufacturing the fiber felt comprises the following steps: The first step: firstly, the chemical fiber staple fibers A with a diameter of 19-25 μm are opened, and then the opened chemical fiber staple fibers A are randomly combed to form a thin fiber web B with a weight of 20-40 g / m2; Step 2: First, multiple layers of the thin fiber web B are laid in parallel, wherein the thickness of the multiple layers of the thin fiber web B does not exceed 5 mm, and then the multiple layers of the thin fiber web B are needle-punched to obtain a fiber web; Step 3: First, the fiber web is laid to obtain a multi-layer fiber web, and then the multi-layer fiber web is reinforced to obtain a fiber felt block with a volume density of 0.2-0.3 g / cm3; Step 4: According to the requirements of the automatic primer equipment, the fiber felt block is modularly processed to obtain a fiber felt of a specific shape and specification.

[0007] In the third step, the method of laying the net and reinforcing the net is any one of the following: The first method of laying and reinforcing is to lay the above fiber webs in parallel to obtain a multi-layer fiber web, and then perform needle punching reinforcement on the multi-layer fiber web; The second method of laying and reinforcing is to first fold the single-layer fiber web back and forth in the vertical direction to perform vertical laying to form a multi-layer structure, and then use a needle-type pressing plate to reinforce each two layers of fiber web folded together in the vertical direction.

[0008] In the third step, in the first web laying and reinforcement method, the parallel web laying refers to: using serial parallel web laying to stack the fiber webs layer by layer until the web laying density reaches 10-40 g / m2 to obtain a multi-layer fiber web; In the third step, in the first web laying and reinforcement method, the needle punching reinforcement refers to: needle punching reinforcement of the multi-layer fiber web with a needle punching density of 20-108 needle holes / square centimeter.

[0009] In the first step, the random combing refers to: random combing with a condensing roller or random combing with a random roller.

[0010] The random combing using the condensing roller means that the opened chemical fiber staple fibers A are passed through the feeding roller and then enter the working roller, the cylinder, the doffer, the condensing roller, and the stripping roller to form a thin fiber web B; The condensing roller includes a first condensing roller and a second condensing roller; The linear speed ratio of the doffer to the first condensing roller is 2 / 1-1.75 / 1, and the linear speed ratio of the first condensing roller to the second condensing roller is 1.5 / 1-1.3 / 1.

[0011] The random combing using random rollers means that the opened chemical fiber staple fibers A are fed through the feeding rollers and then enter the working rollers, the cylinder, the random rollers, the doffer, and the stripping rollers to form a thin fiber web B; The linear speed of the random roller is 1200-1300 m / min.

[0012] In the second step, the step of subjecting the multi-layer thin fiber web B to a needle punch reinforcement to obtain a fiber web refers to subjecting the multi-layer thin fiber web B to a needle punch reinforcement to obtain a fiber web under the conditions of a needle density of 40-70 needles / square meter and a needle punch strength of 10N-50N.

[0013] In the fourth step, the fiber felt block is processed into modules according to the requirements of the automatic primer equipment to obtain a fiber felt of a specific shape and specification, which means: firstly, a corresponding mold is made according to the use requirements of the automatic primer equipment, and then the mold is used to cut the fiber felt block to obtain a fiber felt that meets the use requirements of the corresponding automatic primer equipment; The usage requirements include the interface shape, size specifications, and requirements for the substrate to be coated of the automatic primer equipment.

[0014] The fiber mat is made by the method for making a fiber mat for automatic primer coating equipment as described in claim 1, 2 or 3.

[0015] The fiber felt is a cylinder, and a central hole is provided in the center of the fiber felt, which passes through the center from top to bottom. The height of the fiber felt cylinder is 15-30 mm, the outer diameter is 12-18 mm, and the diameter of the central hole is 2-3.5 mm.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. A method for making a fiber felt for an automatic primer coating device and a fiber felt, wherein the chemical fiber staple fibers A with a diameter of 19-25 μm are first loosened and randomly combed to form a thin fiber web B of 20-40 g / m2, and then the thin fiber web B is laid in parallel and reinforced by needle punching to obtain a fiber web, and then the fiber web is laid to obtain a multi-layer fiber web, and the multi-layer fiber web is reinforced to obtain a fiber felt block of 0.2-0.3 g / cm3, and finally the fiber felt block is processed into a fiber felt that meets the corresponding specifications according to the specifications of the automatic primer coating device; when used, the fiber felt has good porosity and compression resilience, and the fibers are evenly distributed. During the manufacturing process, a thin fiber web B of 20-40 g / m2 is formed, the thickness of the multi-layer thin fiber web B does not exceed 5 mm, and the fiber web is laid, thereby optimizing the fiber The pore structure of the felt makes the fiber felt have a good porosity, the multi-layer thin fiber web B is needle-punched and reinforced, and the fiber web is laid and reinforced, so that the fiber felt has a multi-layer structure, so that the compression resilience of the fiber felt is good, the chemical fiber staple fibers A are opened and randomly combed, and the thin fiber web B is laid in parallel, so that the chemical fiber staple fibers A are more evenly distributed in the fiber felt, and the good porosity and uniformity of the fiber felt make the penetration of the primer uniform, thereby ensuring the uniformity of the coating width and thickness, and the good compression resilience of the fiber felt ensures that the contact pressure between the fiber felt and the coated surface remains consistent and stable during the coating process, so that the penetration of the primer is stable and accurate, and then the fiber felt can be accurately and stably coated during the coating process, and the uniformity of the coating width and thickness is improved. Therefore, the present invention can not only produce a fiber felt for automatic primer equipment, but also improve the uniformity of the coating thickness and width of the fiber felt.

[0017] 2. A method for making a fiber felt for an automatic primer coating device and a fiber felt, firstly fold the above-mentioned single-layer fiber web back and forth in the vertical direction to perform vertical laying to form a multi-layer structure, and then reinforce each two layers of the fiber web folded together in the vertical direction by a needle pressure plate; when used, vertical laying of the above-mentioned single-layer fiber web can make the fibers vertically arranged in the fiber web, so that the fibers are more evenly distributed in the vertical direction, which helps to form a more uniform fiber web structure, and the fiber web is reinforced by the needle pressure plate, which effectively increases the entanglement points between the fibers, improves the connection strength between the fiber felt layers and the wear resistance of the fiber felt, especially when coating a substrate with an uneven surface, the better connection strength and wear resistance of the fiber felt can avoid the fiber fracture problem caused by the large shear force between the fiber layers, thereby improving the service life of the fiber felt. Therefore, the present invention can not only improve the uniformity of the coating thickness and width, but also improve the service life of the fiber felt.

[0018] 3. A method for making a fiber felt for an automatic primer coating device and a fiber felt, firstly making a corresponding mold according to the use requirements of the automatic primer coating device, and then using the mold to cut on the above-mentioned fiber felt block to obtain a fiber felt that meets the use requirements of the corresponding automatic primer coating device; when used, the mold is customized according to the interface shape, size, and substrate requirements of the automatic primer coating device, and the mold can be used to accurately cut out a three-dimensional fiber felt on the fiber felt that matches the corresponding automatic primer coating device. The fiber felt can better adapt to the automatic primer coating device, thereby improving the coating effect and uniformity of the primer, and at the same time, reducing material waste and improving the utilization rate of the fiber felt block. In addition, the fiber felt can be applied to different automatic primer coating devices and work surfaces, and has high versatility. Therefore, the present invention not only has a good coating effect, but also has versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flow chart of the present invention.

[0020] Figure 2 It is a schematic diagram of the process of parallel laying of the web in the present invention.

[0021] Figure 3 It is a schematic diagram of the process of vertical web laying in the present invention.

[0022] Figure 4 Schematic diagram of the structure of the fiber felt in an embodiment of the present invention.

[0023] In the figure: a fiber web 1, a multi-layer fiber web 11, a fiber felt block 2, a needle punching reinforcement direction 21, and a needle pressing plate 22. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] See also Figure 1 — Figure 4 , a method for making a fiber felt for an automatic primer coating device and a fiber felt, the method for making the fiber felt comprising the following steps: The first step: firstly, the chemical fiber staple fibers A with a diameter of 19-25 μm are opened, and then the opened chemical fiber staple fibers A are randomly combed to form a thin fiber web B with a weight of 20-40 g / m2; Step 2: First, lay multiple layers of the thin fiber web B in parallel, wherein the thickness of the multiple layers of the thin fiber web B does not exceed 5 mm, and then perform needle punching reinforcement on the multiple layers of the thin fiber web B to obtain a fiber web 1; Step 3: First, the fiber web 1 is laid to obtain a multi-layer fiber web 11, and then the multi-layer fiber web 11 is reinforced to obtain a fiber felt block 2 with a volume density of 0.2-0.3 g / cm3; Step 4: According to the requirements of the automatic primer equipment, the fiber felt block 2 is processed into modules to obtain a fiber felt of a specific shape and specification.

[0026] In the third step, the method of laying the net and reinforcing the net is any one of the following: The first web laying and reinforcement method: firstly, the fiber web 1 is laid in parallel to obtain a multi-layer fiber web 11, and then the multi-layer fiber web 11 is reinforced by needle punching; The second method of laying and reinforcing is to first fold the single-layer fiber web 1 back and forth in the vertical direction to perform vertical laying to form a multi-layer structure, and then use a needle pressing plate 22 to reinforce every two layers of the fiber web 1 folded together in the vertical direction.

[0027] In the third step, in the first web laying and reinforcement method, the parallel web laying refers to: using serial parallel web laying to stack the fiber web 1 layer by layer until the web laying density reaches 10-40 g / m2 to obtain a multi-layer fiber web 11; In the third step, in the first web laying and reinforcement method, the needle punching reinforcement refers to: needle punching reinforcement of the multi-layer fiber web 11, and the needle punching density is 20-108 needle holes / square centimeter.

[0028] In the first step, the random combing refers to: random combing with a condensing roller or random combing with a random roller.

[0029] The random combing using the condensing roller means that the opened chemical fiber staple fibers A are passed through the feeding roller and then enter the working roller, the cylinder, the doffer, the condensing roller, and the stripping roller to form a thin fiber web B; The condensing roller includes a first condensing roller and a second condensing roller; The linear speed ratio of the doffer to the first condensing roller is 2 / 1-1.75 / 1, and the linear speed ratio of the first condensing roller to the second condensing roller is 1.5 / 1-1.3 / 1.

[0030] The random combing using random rollers means that the opened chemical fiber staple fibers A are fed through the feeding rollers and then enter the working rollers, the cylinder, the random rollers, the doffer, and the stripping rollers to form a thin fiber web B; The linear speed of the random roller is 1200-1300 m / min.

[0031] In the second step, the step of subjecting the multi-layer thin fiber web B to needle punch reinforcement to obtain the fiber web 1 refers to subjecting the multi-layer thin fiber web B to needle punch reinforcement to obtain the fiber web 1 under the conditions of a needle density of 40-70 needles / square meter and a needle punch strength of 10N-50N.

[0032] In the fourth step, the fiber felt block 2 is processed into modules according to the requirements of the automatic primer equipment to obtain a fiber felt of a specific shape and specification, which means: firstly, a corresponding mold is made according to the use requirements of the automatic primer equipment, and then the mold is used to cut the fiber felt block 2 to obtain a fiber felt that meets the use requirements of the corresponding automatic primer equipment; The usage requirements include the interface shape, size specifications, and requirements for the substrate to be coated of the automatic primer equipment.

[0033] The fiber mat is made by the method for making a fiber mat for automatic primer coating equipment as described in claim 1, 2 or 3.

[0034] The fiber felt is a cylinder, and a central hole is provided in the center of the fiber felt, which passes through the center from top to bottom. The height of the fiber felt cylinder is 15-30 mm, the outer diameter is 12-18 mm, and the diameter of the central hole is 2-3.5 mm.

[0035] The supplementary description of the present invention is as follows: In the present invention, the chemical fiber staple fibers A are preferably any one or any combination of polyester staple fibers, polypropylene staple fibers, polyamide staple fibers and polyacrylonitrile staple fibers.

[0036] In the present invention, the preferred chemical fiber staple fibers A are formed by cutting chemical fiber filaments A.

[0037] The reason why the present invention preferably uses chemical fibers to make fiber felt is that the chemical fibers have uniform length, the process of making fiber felt using the present invention is simpler and more controllable than that of wool fibers, and is more conducive to controlling and optimizing the porosity of the fiber felt, thereby improving the porosity of the fiber felt; at the same time, chemical fibers have better physical and chemical resistance, and are not easy to solidify and fall off during contact with the primer, thereby improving the coating length and service life.

[0038] In the present invention, the fiber web 1 is preferably dried before being laid.

[0039] The reason why the fiber web 1 is preferably dried in the present invention is to effectively remove moisture from the fiber web 1 and fix the fiber structure, thereby ensuring the performance and quality of the final product.

[0040] The present invention preferably lays the fiber web 1 in parallel to obtain a multilayer fiber web 11, and the number of layers of the fiber web 1 is determined by the height and gram weight of the fiber felt finally formed, and the shrinkage rate of the fiber web 1 in the height direction after needle punching reinforcement.

[0041] In the present invention, the fiber web 1 is preferably laid in parallel to obtain a multi-layer fiber web 11, and the thickness of the laid fiber web 1 is determined according to the fluffiness, gram weight and height of the finally formed fiber felt after the selected material is laid into a single-layer fiber web.

[0042] The preferred vertical laying of the present invention can directly form a fiber felt block 2 having the same thickness as the finished fiber felt product.

[0043] In the present invention, the height of the fiber mat is preferably adjusted during laying, and the shape and length and width dimensions of the fiber mat are tailored or cut according to the interface shape and size of the automatic primer equipment and the substrate to be coated.

[0044] The preferred process parameters of the needle punching reinforcement of the present invention include the needle density of the needle plate, the needle punching intensity, the needle punching frequency and the needle punching method.

[0045] The thin fiber web B formed by random combing with a condensing roller is preferably formed in the present invention with a longitudinal / transverse strength ratio of 5 / 1-6 / 1.

[0046] The present invention preferably adopts random rollers to form the thin fiber web B with a longitudinal / transverse strength ratio of 4 / 1-3 / 1.

[0047] Embodiment 1: See also Figure 1 — Figure 4 , a method for making a fiber felt for an automatic primer coating device and a fiber felt, the method for making the fiber felt comprising the following steps: The first step: firstly, the chemical fiber staple fibers A with a diameter of 19-25 μm are opened, and then the opened chemical fiber staple fibers A are randomly combed to form a thin fiber web B with a weight of 20-40 g / m2; Step 2: First, lay multiple layers of the thin fiber web B in parallel, wherein the thickness of the multiple layers of the thin fiber web B does not exceed 5 mm, and then perform needle punching reinforcement on the multiple layers of the thin fiber web B to obtain a fiber web 1; Step 3: First, the fiber web 1 is laid to obtain a multi-layer fiber web 11, and then the multi-layer fiber web 11 is reinforced to obtain a fiber felt block 2 with a volume density of 0.2-0.3 g / cm3; Step 4: According to the requirements of the automatic primer equipment, the fiber felt block 2 is processed into modules to obtain a fiber felt of a specific shape and specification.

[0048] When used, the chemical fiber staple fiber A is selected from one or any combination of polyester staple fiber, polypropylene staple fiber, polyamide staple fiber and polyacrylonitrile staple fiber. These chemical fibers have good wear resistance and physical and chemical resistance, can avoid curing and falling off during contact with the primer, and increase the coating length; in the production process, a 20-40 g / m2 thin fiber web B is formed and the fiber web 1 is laid, the pore structure of the fiber felt is optimized, and the fiber felt has a good porosity; the multi-layer thin fiber web B is needle-punched and reinforced, and the fiber web 1 is laid and reinforced, so that the fiber felt has a multi-layer structure, so that the compression resilience of the fiber felt is good; the chemical fiber staple fiber A is opened and mixed The thin fiber web B is randomly combed and laid in parallel to make the chemical fiber staple fibers A loose and in a single fiber state, and randomly arranged in the thin fiber web B, thereby improving the uniformity of the fiber web 1 and making the chemical fiber staple fibers A more evenly distributed in the fiber felt; the better porosity and fiber distribution uniformity of the fiber felt make the penetration of the primer uniform, thereby making the coating width and thickness uniform; and the better compression resilience of the fiber felt makes the contact pressure between the fiber felt and the coated surface consistent and stable during the coating process, thereby making the penetration of the primer stable and accurate, and then the fiber felt can be accurately and stably coated during the coating process, and the coating width and thickness have better uniformity.

[0049] Embodiment 2: The basic content is the same as Example 1, except that: in the third step, the web laying and reinforcement method is any one of the following: the first web laying and reinforcement method: firstly, the above-mentioned fiber web 1 is laid in parallel to obtain a multi-layer fiber web 11, and then the multi-layer fiber web 11 is reinforced by needle punching; the second web laying and reinforcement method: firstly, the above-mentioned single-layer fiber web 1 is folded back and forth in the vertical direction to be vertically laid to form a multi-layer structure, and then, each two layers of fiber web 1 folded together in the vertical direction are reinforced by a needle pressing plate 22.

[0050] When the fiber web 1 is laid and reinforced in parallel, several carding machines are first arranged in series front and back, so that the fiber web 1 output by each carding machine is laid layer by layer to form a multi-layer fiber web 11, and then the multi-layer fiber web 11 is needle-punched and reinforced to obtain a fiber felt block 2, thereby improving the overall stability and strength of the fiber felt block 2; when the fiber web 1 is laid and reinforced vertically, the single-layer fiber web 1 output by the carding machine is guided by the guide plate and wire grid of the vertical laying device, and is reciprocally folded as the forming comb in the vertical laying device swings up and down, and is pushed by the needle pressure plate 22 to be laid into an up and down folded fiber felt block 2. The thick web is stacked, and due to the action of the needles on the pressing plate, each layer of the fiber web 1 is pressed tightly, and a certain degree of mechanical entanglement can be formed between the fibers, and finally a fiber felt block 2 is obtained; since the vertical laying method is adopted, the fibers are arranged vertically in the fiber web, which helps to improve the connection strength between the fiber layers of the fiber felt block 2, as well as improve the fluffiness, compression resilience and wear resistance of the fiber felt block 2, avoiding the fiber fracture problem caused by the large shear force between the fiber layers during the coating process, thereby improving the accuracy and stability of the coating width and thickness, and at the same time increasing the service life of the fiber felt.

[0051] Embodiment 3: The basic content is the same as Example 1, except that: in the third step, in the first web laying and reinforcement method, the parallel web laying refers to: using serial parallel web laying, stacking the above-mentioned fiber web 1 layer by layer until the web laying density reaches 10-40 g / m2, to obtain a multi-layer fiber web 11; in the third step, in the first web laying and reinforcement method, the needle punching reinforcement refers to: needle punching the multi-layer fiber web 11, and the needle punching density is 20-108 needle holes / square centimeter.

[0052] When in use, several carding machines are first arranged in series front and back, so that the fiber web 1 output by each carding machine is stacked layer by layer until the laying density of the multi-layer fiber web 1 reaches 10-40 g / m2, forming a multi-layer fiber web 11, and then according to the thickness, gram weight and performance of the primer of the fiber felt, the multi-layer fiber web 11 is needle-punched to reinforce, and the needle-punching density is selected to be 20-108 needle holes / square centimeter to obtain a fiber felt block 2, which improves the overall stability and strength of the fiber felt block 2 while maintaining a good porosity.

[0053] Embodiment 4: The basic content is the same as Example 1, except that: the use of a condensing roller for random combing means that the opened chemical fiber staple fibers A pass through a feeding roller and enter a working roller, a cylinder, a doffer, a condensing roller, and a stripping roller to form a thin fiber web B; the condensing roller includes a first condensing roller and a second condensing roller; the linear speed ratio of the doffer to the first condensing roller is 2 / 1-1.75 / 1, and the linear speed ratio of the first condensing roller to the second condensing roller is 1.5 / 1-1.3 / 1.

[0054] During application, the chemical fiber staple fibers A are fed into the feeding roller and enter the combing process. After being further loosened by the working roller, the chemical fiber staple fibers A are further combed and mixed under the high-speed rotation of the cylinder. The combed chemical fiber staple fibers A are transferred to the doffer to form a preliminary fiber web. Under the action of the first condensing roller, the fibers of the preliminary fiber web are further compressed and randomly arranged to enhance the transverse strength of the fiber web. Under the action of the second condensing roller, the random arrangement of the fibers of the preliminary fiber web is further strengthened to further improve the longitudinal and transverse strength ratio of the fiber web. Finally, the fiber web is stripped off from the doffer under the action of the stripping roller to form a thin fiber web B. Since the linear speed ratio of the doffer to the first condensing roller is 2 / 1-1.75 / 1, and the linear speed ratio of the first condensing roller to the second condensing roller is 1 .5 / 1-1.3 / 1, that is, the linear speed of the doffer is greater than the linear speed of the first condensing roller and greater than the linear speed of the second condensing roller. There is negative stretching in the process of transferring the fibers from the doffer to the first condensing roller and from the first condensing roller to the second condensing roller. When the condensing roller peels off the fiber web, the fibers in the fiber web are in a short-term relaxed state. The fibers are compressed in the process of transferring from the doffer to the condensing roller. Since the fibers are flexible materials, the longitudinally arranged fibers in the fiber web will be transferred to the transverse direction due to the extrusion force, thereby increasing the proportion of transversely arranged fibers, changing the direction of fiber arrangement, and reducing the orientation degree of the fiber web, thereby making the longitudinal / transverse strength ratio of the formed thin fiber web B reach 5 / 1-6 / 1, so that the fibers in the fiber felt are evenly distributed, and the compression resilience and porosity of the fiber felt are improved.

[0055] Embodiment 5: The basic content is the same as Example 1, except that: the use of random rollers for random combing means that the opened chemical fiber staple fibers A are passed through the feeding rollers and enter the working rollers, cylinders, random rollers, doffers, and stripping rollers to form a thin fiber web B; the linear speed of the random rollers is 1200-1300m / min.

[0056] During use, the chemical fiber staple fibers A are fed into the feeding roller and begin the combing process. After the chemical fiber staple fibers A are further loosened by the working roller, they are further combed and mixed under the high-speed rotation of the cylinder. The combed chemical fiber staple fibers A enter the high-speed random roller. The linear speed of the random roller is 1200-1300m / min. The high-speed rotation of the random roller causes the chemical fiber staple fibers A to be arranged in a disorderly manner, thereby increasing the lateral strength of the fiber web. Then the chemical fiber staple fibers A are transferred to the doffer to form a preliminary fiber web. Finally, the preliminary fiber web is stripped off from the doffer under the action of the stripping roller to form a thin fiber web B, so that the longitudinal / transverse strength ratio of the formed thin fiber web B is 4 / 1-3 / 1, thereby improving the uniformity of fiber distribution and effectively improving the porosity and compression resilience of the fiber felt.

[0057] Embodiment 6: The basic content is the same as Example 1, except that: in the fourth step, the modular processing of the fiber felt block 2 according to the requirements of the automatic primer equipment to obtain a fiber felt of a specific shape and specification means: first, a corresponding mold is made according to the use requirements of the automatic primer equipment, and then the mold is used to cut the fiber felt block 2 to obtain a fiber felt that meets the use requirements of the corresponding automatic primer equipment; the use requirements include the interface shape, size specifications, and requirements of the substrate to be coated of the automatic primer equipment.

[0058] When in use, a corresponding mold is customized according to the interface shape, size, and requirements of the substrate to be coated of the automatic primer equipment, and then the mold is used to cut the fiber felt block 2 to obtain a three-dimensional fiber felt. Using a customized mold for cutting can ensure that the size and shape of the fiber felt fully meet the use requirements of the automatic primer equipment and the coating substrate, so that the fiber felt can better adapt to the automatic primer equipment and the substrate, thereby improving the coating accuracy; in addition, it can reduce material waste and improve the utilization rate of the fiber felt block 2.

[0059] Embodiment 7: The basic content is the same as Example 1, except that: in the second step, the multi-layer thin fiber web B is needle-punched to obtain the fiber web 1, which means that the multi-layer thin fiber web B is needle-punched to obtain the fiber web 1 under the conditions of a needle density of 40-70 needles / square meter and a needle punching strength of 10N-50N.

[0060] When used, multiple layers of thin fiber web B are laid in parallel and then needle-punched to reinforce the multiple layers of thin fiber web B using a needle density of 40-70 needles / square meter and a needle punching strength of 10N-50N to obtain a fiber web 1. This process condition can ensure that the fiber web 1 has good strength and structural stability while having good porosity, thereby improving the permeability of the fiber felt to the primer liquid.

[0061] Embodiment 8: The basic content is the same as Example 1, except that: when the fiber felt is used for coating automobile glass primer, the fiber felt is prepared into a cylinder with a hole in the center through a mold according to the specifications of the automatic primer equipment. The fiber felt is a cylinder, and a center hole is opened in the center of the fiber felt from top to bottom. The column height of the fiber felt is 15-30mm, the outer diameter is 12-18mm, and the center hole diameter is 2-3.5mm.

[0062] Embodiment 9: The basic contents are the same as those of Example 1, except that: when polyester staple fibers with a fiber diameter of 23 μm are used to make a fiber felt for an automatic primer coating device for automotive glass; The first step: firstly, the polyester staple fibers with a fiber diameter of 23 μm are opened, and then the opened polyester staple fibers are randomly combed to form a polyester thin fiber web with a weight of 20-40 g / m2; Step 2: First, lay multiple layers of the polyester thin fiber web in parallel, and then perform needle punching reinforcement on the multiple layers of the polyester thin fiber web to obtain a polyester fiber web; Step 3: First, the polyester fiber web is laid to obtain a multi-layer polyester fiber web, and then the multi-layer polyester fiber web is reinforced, and the laying layers and acupuncture parameters of the polyester thin fiber web are adjusted according to the thickness requirements of the fiber felt finished product and the shrinkage rate of the acupuncture reinforcement in the height direction, to obtain a polyester fiber felt block with a volume density of 0.26 g / cm3 and a height of 20 mm; Step 4: According to the specifications of the automatic primer equipment, the polyester fiber felt block is processed into a cylindrical fiber felt with a center hole at the center of the circle, the cylindrical height of the fiber felt is 20 mm, the outer diameter of the fiber felt is 15 mm, and the diameter of the center hole of the fiber felt is 2.5 mm.

[0063] During application, a fiber felt with a column height of 20mm, an outer diameter of 15mm and a center hole diameter of 2.5mm is installed on an automatic primer equipment. Under a pressure of 0.5kg, the length of the fiber felt applied to the automotive glass primer is greater than or equal to 650 meters. After testing by the primer testing system, the accuracy of the coating thickness and width of the fiber felt reaches 99.9%.

[0064] Embodiment 10: The basic content is the same as Example 1, except that: when two or more different chemical fiber staple fibers are used to make a fiber felt for an automatic primer coating device, the two or more different chemical fiber staple fibers are first opened separately, and then the multiple different chemical fiber staple fibers are mixed in proportion according to the mechanical and chemical property requirements of the final fiber felt product. The mixed fibers are then opened for a second time and then randomly combed to form a thin fiber web B.

[0065] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A method for making a fiber felt for an automatic primer coating device, characterized in that: The method for making the fiber felt comprises the following steps: The first step: firstly, the chemical fiber staple fibers A with a diameter of 19-25 μm are opened, and then the opened chemical fiber staple fibers A are randomly combed to form a thin fiber web B with a weight of 20-40 g / m2; Step 2: First, lay multiple layers of the thin fiber web B in parallel, wherein the thickness of the multiple layers of the thin fiber web B does not exceed 5 mm, and then perform needle punching reinforcement on the multiple layers of the thin fiber web B to obtain a fiber web (1); Step 3: firstly, the fiber web (1) is laid to obtain a multi-layer fiber web (11), and then the multi-layer fiber web (11) is reinforced to obtain a fiber felt block (2) having a volume density of 0.2-0.3 g / cm3; Step 4: According to the requirements of the automatic primer equipment, the fiber felt block (2) is processed into modules to obtain a fiber felt of a specific shape and specification.

2. The method for making a fiber felt for an automatic primer coating device according to claim 1, characterized in that: In the third step, the method of laying the net and reinforcing the net is any one of the following: A first web laying and reinforcement method: firstly, the fiber web (1) is laid in parallel to obtain a multi-layer fiber web (11), and then the multi-layer fiber web (11) is reinforced by needle punching; The second method of laying and reinforcing is to first fold the above-mentioned single-layer fiber web (1) back and forth in the vertical direction to vertically lay the web to form a multi-layer structure, and then use a needle pressing plate (22) to reinforce each two layers of fiber web (1) folded together in the vertical direction.

3. The method for making a fiber felt for an automatic primer coating device according to claim 2, characterized in that: In the third step, in the first web laying and reinforcement method, the parallel web laying refers to: using serial parallel web laying to stack the fiber web (1) layer by layer until the web laying density reaches 10-40 g / m2, thereby obtaining a multi-layer fiber web (11); In the third step, in the first web laying and reinforcement method, the needle punching reinforcement refers to: needle punching reinforcement of the multi-layer fiber web (11) with a needle punching density of 20-108 needle holes / square centimeter.

4. A method for making a fiber felt for an automatic primer coating device according to claim 1, 2 or 3, characterized in that: In the first step, the random combing refers to: random combing with a condensing roller or random combing with a random roller.

5. The method for making a fiber felt for an automatic primer coating device according to claim 4, characterized in that: The random combing using the condensing roller means that the opened chemical fiber staple fibers A are passed through the feeding roller and then enter the working roller, the cylinder, the doffer, the condensing roller, and the stripping roller to form a thin fiber web B; The condensing roller includes a first condensing roller and a second condensing roller; The linear speed ratio of the doffer to the first condensing roller is 2 / 1-1.75 / 1, and the linear speed ratio of the first condensing roller to the second condensing roller is 1.5 / 1-1.3 / 1.

6. The method for making a fiber felt for an automatic primer coating device according to claim 4, characterized in that: The random combing using random rollers means that the opened chemical fiber staple fibers A are fed through the feeding rollers and then enter the working rollers, the cylinder, the random rollers, the doffer, and the stripping rollers to form a thin fiber web B; The linear speed of the random roller is 1200-1300 m / min.

7. A method for making a fiber felt for an automatic primer coating device according to claim 1, 2 or 3, characterized in that: In the second step, the step of subjecting the multi-layer thin fiber web B to needle punch reinforcement to obtain the fiber web (1) means: subjecting the multi-layer thin fiber web B to needle punch reinforcement to obtain the fiber web (1) under the conditions of a needle density of 40-70 needles / square meter and a needle punching strength of 10N-50N.

8. A method for making a fiber felt for an automatic primer coating device according to claim 1, 2 or 3, characterized in that: In the fourth step, the fiber felt block (2) is subjected to modular processing according to the requirements of the automatic primer coating equipment to obtain a fiber felt of a specific shape and specification, which means: firstly, a corresponding mold is manufactured according to the use requirements of the automatic primer coating equipment, and then the mold is used to cut the fiber felt block (2) to obtain a fiber felt that meets the use requirements of the corresponding automatic primer coating equipment; The usage requirements include the interface shape, size specifications, and requirements for the substrate to be coated of the automatic primer equipment.

9. A fiber felt, characterized in that: The fiber mat is made by the method for making a fiber mat for automatic primer coating equipment as described in claim 1, 2 or 3.

10. A fiber mat according to claim 9, characterized in that: The fiber felt is a cylinder, and a central hole is provided in the center of the fiber felt, which passes through the center from top to bottom. The height of the fiber felt cylinder is 15-30 mm, the outer diameter is 12-18 mm, and the diameter of the central hole is 2-3.5 mm.

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