Airbag base fabric coating paint and coating machine thereof

Abstract

The invention relates to the technical field of airbag cloth processing, and specifically to an airbag base cloth coating paint and a glue coating machine thereof. The raw materials for preparing the airbag base cloth coating paint of the invention include silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter, leveling agent and deionized water, so that the paint has excellent strength, impact resistance, heat resistance, corrosion resistance and adhesion. The glue coating machine of the invention includes two side frames arranged opposite to each other, a plurality of guide rollers are rotatably installed between the two side frames, and a cover frame is arranged between the two side frames; cloth tensioning mechanisms for longitudinally tensioning the airbag base cloth are arranged on both sides of the cover frame; an airflow circulation mechanism for drying and curing the paint coating is arranged between the cover frame and the two side frames, which can tighten the cloth in the transverse and longitudinal directions to ensure uniform coating thickness, and can also make full use of the heat energy of the hot air in the drying process to reduce energy waste.

Description

Technical Field

[0001] The invention relates to the technical field of airbag cloth processing, in particular to an airbag base cloth coating paint and a glue coating machine thereof. Background Art

[0002] With the continuous increase in the number and speed of cars, the safety of vehicles has also received increasing attention from consumers and drivers. Among them, airbags, as one of the safety components of automobiles, are mainly used to reduce the impact of collisions during accidents or to reduce the contact between vehicle accessories and the human body. Airbag base fabric is a fabric specially used to manufacture automobile airbags, which has excellent strength, impact resistance, heat resistance and corrosion resistance.

[0003] The prior art discloses a Chinese patent with publication number CN 209502155 U: a gluing mechanism for a knitting machine, and discloses a pressing assembly placed at the front side of the gluing assembly and used to press the cloth, a tensioning assembly placed at the rear side of the gluing assembly and used to tighten the cloth, and a fan placed between the gluing assembly and the tensioning assembly. The pressing assembly and the tensioning assembly are used to tighten the two ends of the cloth along the conveying direction, and the glue on the surface of the cloth is blown dry by the fan, thereby achieving uniform and automatic gluing and drying.

[0004] However, the above-mentioned prior art still has certain defects, that is, during use, by only tightening the two ends of the cloth in the conveying direction, it is easy to cause local wrinkles in the direction perpendicular to the conveying direction during the conveying process of the cloth, which in turn leads to local uneven coating. In addition, the applied glue is dried by a fan placed between the glue coating component and the tensioning component, which is easy to adhere to debris floating in the air in an open environment. Summary of the invention

[0005] The object of the present invention is to provide an airbag base fabric coating material and a coating machine thereof to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An airbag base fabric coating paint, wherein the raw materials for preparing the airbag base fabric coating paint include organic silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter, leveling agent and deionized water, the total amount of organic silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter and leveling agent and deionized water are used in a ratio of 6:4, and the weight percentages of the above components are respectively 25-35% of organic silicone resin, 15-20% of epoxy resin, 8-12% of silicone powder, 35-40% of compatibility regulator, 2-5% of adhesion promoter and 0.8-1.2% of leveling agent;

[0008] The preparation of the airbag base fabric coating specifically includes the following steps:

[0009] S1: Add silicone resin and epoxy resin into a reaction kettle, disperse for 12-15 minutes, then add compatibility regulator, continue to disperse for 5-10 minutes, and obtain mixture A for standby use;

[0010] S2: Add the adhesion promoter and the leveling agent to the mixture A in sequence, stir and disperse them thoroughly, and adjust the pH of the mixture to 8-8.5 to obtain a mixture B for standby use;

[0011] S3: Add silicone powder to mixture B, stir thoroughly at a stirring speed of 500 r / min, and disperse until uniform and particle-free to obtain the target coating.

[0012] A coating machine for coating a coating material for an airbag base fabric, which is used to coat the coating material for the airbag base fabric on the surface of the airbag base fabric, the coating machine comprising two side frames arranged opposite to each other, a plurality of guide rollers rotatably mounted between the two side frames, a cover frame arranged between the two side frames, and a plurality of connecting strips fixedly connected between the two sides of the cover frame and the corresponding side frames;

[0013] A cloth tensioning mechanism for longitudinally tensioning the airbag base cloth conveyed by the guide rollers is provided between the two sides of the cover frame and the corresponding side frames;

[0014] An air circulation mechanism for drying and curing the coating on the surface of the airbag base fabric after coating is arranged between the cover frame and the two side frames. The air circulation mechanism consists of an air outlet and an air return portion.

[0015] In a preferred embodiment, the cloth tensioning mechanism includes multiple groups of cross bars fixed on the inner sides of corresponding side frames, two in each group, and a conveyor belt is transmission-connected between the two cross bars in each group. The multiple groups of cross bars are disposed on both sides of the conveyed airbag base cloth, and two limiting rings for limiting the corresponding conveyor belt are fixedly sleeved on the outer side of each cross bar. The connecting strip is located on the inner side of the corresponding conveyor belt, and multiple tensioning components equidistantly distributed are installed on the outer side of the conveyor belt.

[0016] In a preferred embodiment, the cloth tensioning mechanism also includes a plurality of top strips disposed on both sides of the conveyed airbag base cloth, the top strip on one side of the airbag base cloth is directly opposite to the cover frame, and a straight rod is fixedly connected between the top strip and the cover frame, the top strip on the other side of the airbag base cloth is staggered with the cover frame, and a U-shaped rod is fixedly connected between the top strip and the corresponding side frame.

[0017] In a preferred embodiment, the tensioning assembly includes a core rod fixedly passing through the corresponding conveyor belt and an L-shaped seat attached to the outer side of the corresponding conveyor belt, and the outer sides of both ends of the L-shaped seat are fixed with ear plates rotatably sleeved on the outer sides of the corresponding ends of the core rod;

[0018] A T-slot is provided on the inner side of the L-shaped seat, a T-block is slidably installed inside the T-slot, one end of the T-block extending outside the T-slot is fixedly connected to a tightening block, a guide rod movably penetrating the corresponding tightening block is also fixedly provided on the inner side of the L-shaped seat, a spring movably sleeved on the outer side of the guide rod is fixedly connected to the corresponding tightening block and the inner wall of the L-shaped seat, and the top strip and the tightening block that moves with the conveyor belt to the area where the corresponding top strip is located are in contact with each other.

[0019] In a preferred embodiment, the air outlet comprises an annular tube rotatably mounted between two side frames and guide wheels fixedly sleeved on the outer sides of both ends of the annular tube, one end of the annular tube is sealed, and an air distribution pipe sleeved on the outside of the annular tube is fixedly arranged between the two guide wheels;

[0020] The outer side of the air distribution pipe is penetrated by a plurality of air outlet grooves evenly distributed in an annular shape, the outer side of the ring tube is penetrated by a plurality of air outlet holes evenly distributed in an annular shape at a position inside the air distribution pipe, and a plurality of electric heating tubes evenly distributed in an annular shape are fixedly embedded at a position inside the air distribution pipe on the outer side of the ring tube;

[0021] The air outlet part also includes an inclined platform fixed on the inner side of the cover frame and a plurality of equally spaced partition plates, each of which is inclined, and each of which has a plurality of inclined air outlet holes 2 extending through the surface of the partition plate, the air outlet holes 2 on two adjacent partition plates are staggered, the inclined platform is hollow, a plurality of gradiently arranged V-shaped protrusions are arranged on the inclined surface area of ​​the inclined platform, and a plurality of air outlet grooves 2 are arranged on the inclined surface area of ​​the inclined platform.

[0022] In a preferred embodiment, the return air part includes a return air pipe arranged on the outside of the two side frames and an intake pipe rotatably connected to the open end of the ring cylinder, both ends of the two return air pipes are connected to the inclined platform and the interior of the cover frame, a circulating pump is installed on the end of one of the return air pipes away from the inclined platform, a control valve is installed at the intake end of the intake pipe, and a branch pipe is provided between the intake pipe and the corresponding return air pipe.

[0023] In a preferred embodiment, the airbag base fabric feeding end of the cover frame is provided with a coating mechanism for coating the paint onto the surface of the airbag base fabric, the coating mechanism includes a slot opened at the end of the cover frame, a hopper is fixedly installed on the inner side of the slot, a blocking strip is provided inside the discharge end of the hopper, and a discharge control component for controlling the outflow of the paint is provided between the hopper and the corresponding cloth tensioning mechanism.

[0024] In a preferred embodiment, the discharge control assembly includes a through slot that passes through both sides of the hopper, and a J-shaped bar is movably provided inside the two through slots, and one end of the J-shaped bar located inside the hopper is fixedly connected to the outer side of the corresponding end of the blocking bar, and the other end of the J-shaped bar located outside the hopper extends to the corresponding cloth tensioning mechanism;

[0025] The discharge control assembly also includes a guide frame 1 and a guide frame 2 fixed on both sides of the hopper. The guide frame 1 is movably provided with a guide rod 2 fixed on the outside of the J-shaped bar. The outer side of the guide rod 2 is movably sleeved with a spring 2 fixedly connecting the corresponding J-shaped bar and the guide frame 1. One end of the J-shaped bar located outside the hopper is movably provided inside the guide frame 2.

[0026] In a preferred embodiment, a cutting mechanism for trimming the coated airbag base cloth is installed at a position corresponding to one of the guide rollers between the two side frames, and the cutting mechanism includes an arc cover fixed between the two side frames and arranged concentrically with the corresponding guide roller, and an annular groove opened on the outer side of both ends of the corresponding guide roller, and arc-shaped strips are fixed on the inner side of the arc cover at positions corresponding to both sides of the annular groove, and an arc-shaped cutter is fixed between one ends of the two arc-shaped strips located on both sides of the annular groove.

[0027] Beneficial effects of the present invention:

[0028] 1. The present invention can realize longitudinal tightening of the airbag base fabric being transported by utilizing the cloth tensioning mechanisms on both sides of the cover frame, thereby ensuring that the airbag base fabric will not be wrinkled in the longitudinal direction during the coating and coating drying and curing process, thereby improving the coating quality;

[0029] 2. The present invention can make the hot air in the entire drying and curing chamber in a continuous circulation process under the action of a circulation pump through an air circulation mechanism, so as to make full use of the heat in the hot air and reduce energy waste. At the same time, the unique structural design of the inclined platform and the partition plate can be used to effectively prolong the residence time of the hot air in the corresponding coating drying and curing area, thereby improving the drying and curing quality;

[0030] 3. The present invention can also intermittently push the J-shaped strip upward by utilizing the cloth tensioning mechanism on both sides of the cover frame, and cooperate with the automatic reset component at the top of the J-shaped strip to realize multiple discharges of small amounts of material, thereby preventing the situation in which the coating is not cured in time due to a large single discharge amount;

[0031] 4. The present invention can separate the coating area and the non-coating area of ​​the airbag base fabric by using the arc-shaped pressure strip inside the arc cover in cooperation with the arc-shaped cutter, and at the same time ensure the flatness of the edge of the cut;

[0032] 5. The airbag base fabric coating of the present invention can not only improve the impact strength and peeling strength of the coating, but also enable the coating to have excellent high temperature resistance, chemical corrosion resistance and insulation properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0036] Figure 3 is an overall top view of the present invention;

[0037] Figure 4 The present invention Figure 3 Schematic diagram of the cross section along the A'-A' direction;

[0038] Figure 5 It is a schematic diagram of the side frame structure of the present invention;

[0039] Figure 6 It is a schematic diagram of the cover frame structure of the present invention;

[0040] Figure 7 It is a schematic diagram of the structure of the inclined platform of the present invention;

[0041] Figure 8 It is a schematic diagram of the structure of the partition plate of the present invention;

[0042] Fig. 9 It is a schematic diagram of the arc cover structure of the present invention;

[0043] Fig.10 The present invention Figure 2 A schematic diagram of the structure enlargement of part A;

[0044] Fig.11 The present invention Figure 4 A schematic diagram of the structure of part B in the middle is enlarged;

[0045] Fig.12 The present invention Figure 6 Schematic diagram of the enlarged structure of part C in the middle.

[0046] The reference numerals in the figure are as follows: 1, side frame; 2, guide roller; 3, cloth tensioning mechanism; 31, cross bar; 32, limit ring; 33, straight rod; 34, U-shaped rod; 35, top bar; 36, conveyor belt; 37, core rod; 38, L-shaped seat; 39, ear plate; 310, T-shaped slot; 311, top tightening block; 312, guide rod 1; 313, spring 1; 4, air circulation mechanism; 41, ring cylinder; 42, air distribution pipe; 43, air outlet groove 1; 44, electric heating pipe; 45, air outlet hole 1; 46. ​​Return air pipe; 47. Branch pipe; 48. Inlet pipe; 49. Partition plate; 410. Second air outlet hole; 411. Inclined platform; 412. Second air outlet slot; 413. Guide wheel; 5. Cutting mechanism; 51. Arc cover; 52. Arc cutter; 53. Arc pressure strip; 54. Annular groove; 6. Coating mechanism; 61. Hopper; 62. Blocking strip; 63. Through slot; 64. J-shaped strip; 65. Guide frame one; 66. Guide frame two; 67. Guide rod two; 68. Second spring; 7. Cover frame; 8. Connecting strip. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The airbag base fabric coating of the present invention belongs to a new material industry, is a part of the coating composition, and is used to be coated on the surface of the base fabric for safety airbags to enhance the heat insulation protection, air tightness and mechanical functional integrity of the airbag base fabric.

[0049] The glue coating machine of the present invention belongs to a kind of airbag base fabric production and processing equipment, and is used for uniformly coating coating paint on the surface of the airbag base fabric.

[0050] An airbag base fabric coating according to an embodiment of the present invention, wherein the raw materials for preparing the airbag base fabric coating include silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter, leveling agent and deionized water, wherein the total amount of silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter and leveling agent to deionized water is in a ratio of 6:4, and the weight percentages of the above components are respectively 25-35% of silicone resin, 15-20% of epoxy resin, 8-12% of silicone powder, 35-40% of compatibility regulator, 2-5% of adhesion promoter and 0.8-1.2% of leveling agent, wherein the compatibility regulator is a silicone coupling agent KH-560 combined with a silicone-modified linear phenolic resin curing agent, and the ratio of the two is 1:1, which can effectively improve the compatibility of the silicone resin and the epoxy resin;

[0051] The preparation of the airbag base fabric coating specifically includes the following steps:

[0052] S1: Add silicone resin and epoxy resin into a reaction kettle, disperse for 12-15 minutes, then add compatibility regulator, continue to disperse for 5-10 minutes, and obtain mixture A for standby use;

[0053] S2: Add the adhesion promoter and the leveling agent to the mixture A in sequence, stir and disperse them thoroughly, and adjust the pH of the mixture to 8-8.5 to obtain a mixture B for standby use;

[0054] S3: Add silicone powder to mixture B, stir thoroughly at a stirring speed of 500 r / min, and disperse until uniform and particle-free to obtain the target coating.

[0055] Refer to the instruction manual Figure 1-2 and Figure 6 In one embodiment of the present invention, a coating machine for coating a coating material for an airbag base fabric is used to coat the coating material for the airbag base fabric on the surface of the airbag base fabric. The coating machine comprises two side frames 1 arranged opposite to each other, and a plurality of guide rollers 2 are rotatably mounted between the two side frames 1, wherein the number of the guide rollers 2 is set to five, and the arrangement method is referred to as Figure 2 As shown, the upper right end is intended to be the feeding end of the airbag base fabric, and the lower left end is the discharging end of the airbag base fabric, and a cover frame 7 is provided between the two side frames 1, and a plurality of connecting strips 8 are fixedly connected between the two sides of the cover frame 7 and the corresponding side frames 1, wherein the cover frame 7 is composed of an inclined coating area and a primary drying and curing area and a secondary drying and curing area which are arranged in parallel, and a plurality of connecting strips 8 are respectively arranged at the position corresponding to each processing area on the outer side of the cover frame 7;

[0056] A cloth tensioning mechanism 3 is provided between both sides of the cover frame 7 and the corresponding side frame 1 for tensioning the airbag base cloth conveyed by the guide roller 2 in the longitudinal direction (i.e., the axial direction of the guide roller 2 set in this application, the same below), wherein the cloth tensioning mechanism 3 is composed of three parts respectively arranged at the positions of the corresponding coating area on the outer side of the cover frame 7 and the first drying and curing area and the second drying and curing area arranged in parallel, and the cloth tensioning mechanism 3 on both sides of the cover frame 7 is arranged as follows: Figure 2 As shown, the parts of the cloth tensioning mechanism 3 on both sides of the airbag base cloth are arranged in a one-to-one correspondence;

[0057] An airflow circulation mechanism 4 is provided between the cover frame 7 and the two side frames 1 for drying and curing the coating on the surface of the airbag base fabric after coating.

[0058] It should be noted that the present invention utilizes a plurality of guide rollers 2 arranged in a specific order to transport the airbag base fabric to be coated, and utilizes a cloth tensioning mechanism 3 to longitudinally tension the airbag base fabric in the area during coating and coating drying and curing, to ensure that the airbag base fabric will not be wrinkled in the longitudinal direction during the coating process, so as to improve the coating quality. In addition, an airflow circulation mechanism 4 is utilized to circulate the hot air in the two-stage drying and curing areas, so as to fully utilize the thermal energy in the hot air and reduce energy loss.

[0059] Specifically, Figure 2-4 , Figure 6 and Fig.12 As shown, the airbag base fabric feeding end of the cover frame 7 is provided with a coating mechanism 6 for coating the coating on the surface of the airbag base fabric, and the coating mechanism 6 includes a slot opened at the end of the cover frame 7, and a hopper 61 is fixedly installed inside the slot, wherein the hopper 61 is configured as follows Figure 4 The V-shaped structure shown in the figure makes the end of the hopper 61 close to the drying and curing zone be arranged vertically with the conveyed airbag base cloth, a cylindrical blocking strip 62 is arranged inside the discharge end of the hopper 61, and a discharge control component for controlling the outflow of the coating is arranged between the hopper 61 and the corresponding cloth tensioning mechanism 3;

[0060] The material discharging control assembly includes a through slot 63 penetrating both sides of the hopper 61, and a J-shaped bar 64 is movably provided inside the two through slots 63, and one end of the J-shaped bar 64 located inside the hopper 61 is fixedly connected to the outer side of the corresponding end of the blocking bar 62, and one end of the J-shaped bar 64 located outside the hopper 61 extends to the corresponding cloth tensioning mechanism 3;

[0061] The discharge control assembly also includes a guide frame 1 65 and a guide frame 2 66 fixedly arranged on both sides of the hopper 61. A guide rod 2 67 fixed on the outside of the J-shaped bar 64 is movably provided on the guide frame 1 65. A spring 2 68 fixedly connected to the corresponding J-shaped bar 64 and the guide frame 1 65 is movably sleeved on the outside of the guide rod 2 67. When the spring 2 68 is in a natural state, the J-shaped bar 64 is in a state such as Fig.12 In the state shown, at this time, the tensioning component on the cloth tensioning mechanism 3 can just push up the J-shaped bar 64 during operation, and the end of the J-shaped bar 64 located outside the hopper 61 is movably penetrated inside the guide frame 2 66, wherein the J-shaped bar 64 moves in a direction perpendicular to the surface of the conveyed airbag base cloth under the restriction of the guide rod 2 67 and the guide frame 1 65 and the auxiliary restriction of the guide frame 2 66. At the same time, the end of the J-shaped bar 64 extending to the corresponding cloth tensioning mechanism 3 is also set to a V-shaped structure, so that the cloth tensioning mechanism 3 can intermittently push up the J-shaped bar 64 during operation to achieve intermittent release of the paint inside the hopper 61.

[0062] It should be noted that, in the process of applying the target coating to the surface of the airbag base fabric being transported, the pressing component on the cloth tensioning mechanism 3 in operation is used to contact the V-shaped structural area on the J-shaped bar 64, and the pressing component is used to push the J-shaped bar 64 upward, so that the rising J-shaped bar 64 compresses the spring 2 68 along the direction of the guide rod 2 67, thereby driving the cylindrical structure blocking bar 62 to move upward to release the blocking state of the discharge end of the hopper 61, so that the coating inside the hopper 61 leaks out to the airbag base fabric. The surface of the cloth is smoothed by the discharge end of the hopper 61, and the cover frame 7 is used to limit the two side areas of the coating. When the pressing component on the cloth tensioning mechanism 3 passes over the J-shaped bar 64, the lifted J-shaped bar 64 will be reset under the action of the spring 2 68, and drive the cylindrical blocking bar 62 to block the discharge end of the hopper 61 again. In this way, small amounts of material can be discharged multiple times to prevent the situation where the paint that is not applied in time is solidified due to a large single discharge amount.

[0063] Specifically, Figure 2 , Figure 5 and Fig.10 As shown, the fabric tensioning mechanism 3 includes multiple groups of cross bars 31 fixed to the inner side of the corresponding side frame 1, each group has two, and a conveyor belt 36 is connected between the two cross bars 31 of each group, and the multiple groups of cross bars 31 are placed on both sides of the conveyed airbag base fabric, and two limit rings 32 for limiting the corresponding conveyor belt 36 are fixedly sleeved on the outer side of each cross bar 31 to prevent the conveyor belt 36 from being dislocated, and the connecting strip 8 is located on the inner side of the corresponding conveyor belt 36, and multiple tensioning components distributed equidistantly are installed on the outer side of the conveyor belt 36;

[0064] The cloth surface tensioning mechanism 3 also includes a plurality of top strips 35 disposed on both sides of the transported airbag base cloth, wherein both ends of each top strip 35 are arranged as arc-shaped structures, so that when the tensioning assembly enters the area where the top strip 35 is located, the top strips 35 can be used to clamp the two sides of the airbag base cloth with the tensioning components on the tensioning assembly and move away from the cover frame 7, so that the transported airbag base cloth is longitudinally tensioned. The top strip 35 located on one side of the airbag base cloth is directly opposite to the cover frame 7, and a straight rod 33 is fixedly connected between the top strip 35 and the cover frame 7. The top strip 35 located on the other side of the airbag base cloth is staggered with the cover frame 7, and a U-shaped rod 34 is fixedly connected between the top strip 35 and the corresponding side frame 1.

[0065] It should be noted that, in the process of using the cloth tensioning mechanism 3 to longitudinally tension the airbag base cloth in transport, the airbag base cloth is allowed to pass through the gap formed between the two cloth tensioning mechanisms 3 located on the same side, and the tensioning components arranged opposite to each other on the two cloth tensioning mechanisms 3 located on the same side are used to clamp the upper and lower sides of the airbag base cloth, so that the airbag base cloth in transport drives the conveyor belt 36 for synchronous transportation, and the tensioning component that moves synchronously with the conveyor belt 36 will enter the area where the top strip 35 is located, and use the top strip 35 to move the tensioning components on the tensioning component that clamp the two sides of the airbag base cloth in the direction away from the cover frame 7, so that the airbag base cloth in transport is longitudinally tensioned.

[0066] Specifically, Figure 2 and Fig.10 As shown, the tensioning assembly includes a core rod 37 fixedly passing through the corresponding conveyor belt 36 and an L-shaped seat 38 attached to the outer side of the corresponding conveyor belt 36. The outer sides of both ends of the L-shaped seat 38 are fixed with ear plates 39 rotatably sleeved on the outer sides of the corresponding ends of the core rod 37. The arrangement of the core rod 37 and the ear plates 39 can ensure that when the L-shaped seat 38 moves with the conveyor belt 36 to the inflection point position at the cross bar 31, it will not cause the conveyor belt 36 to be partially pulled and damaged;

[0067] A T-slot 310 is provided on the inner side of the L-shaped seat 38, a T-block is slidably installed inside the T-slot 310, one end of the T-block extending to the outside of the T-slot 310 is fixedly connected to a tightening block 311, and a guide rod 312 movably penetrating the corresponding tightening block 311 is also fixed on the inner side of the L-shaped seat 38, wherein the setting of the T-block can cooperate with the guide rod 312 to limit the movement of the tightening block 311, so that the tightening block 311 can only move in a straight line, and at the same time, it can prevent the tightening block 311 from being pushed open and causing The guide rod 312 is locally damaged (such as bending or breaking) due to excessive force, and a spring 313 is provided on the outer movable sleeve of the guide rod 312 for fixedly connecting the corresponding tightening block 311 and the inner wall of the L-shaped seat 38, and the top strip 35 and the tightening block 311 that moves with the conveyor belt 36 to the area where the corresponding top strip 35 is located are in contact with each other, wherein when the spring 313 is in a natural state, the distance between the tightening block 311 and the corresponding side of the cover frame 7 is smaller than the distance between the side of the top strip 35 at the position away from the cover frame 7 and the corresponding side of the cover frame 7.

[0068] It should be noted that, in the process of longitudinally tensioning the airbag base fabric being transported by using the tensioning assembly, when the tensioning blocks 311 located on both sides of the airbag base fabric pass through the conveyor belt 36 as shown in FIG. Fig.10When the inflection point position of the cross bar 31 shown in the figure moves toward the airbag base fabric, the two tightening ends of the two tightening blocks 311 arranged opposite to each other on both sides of the airbag base fabric contact the corresponding sides of the airbag base fabric, and the two tightening blocks 311 just clamp the airbag base fabric at the corresponding position, and as the two tightening blocks 311 clamping the airbag base fabric continue to move with the conveyor belt 36 to the area corresponding to the top strip 35 at the position, the tightening blocks 311 will be squeezed along the direction of the guide rod 312 under the action of the corresponding top strip 35, so that the corresponding elastic Spring 1 313 is stretched, that is, the two tightening blocks 311 that clamp the airbag base cloth move synchronously to the side away from the cover frame 7 under the action of the corresponding top strips 35, so that when the airbag base cloth in transportation passes through the area where the top strips 35 are located, the tensioning components on both sides of the cover frame 7 will drive the two sides of the airbag base cloth to move in opposite directions, thereby achieving longitudinal tightening of the airbag base cloth in transportation, ensuring that the airbag base cloth will not be wrinkled in the longitudinal direction during the process of coating and drying and curing of the coating, thereby improving the coating quality.

[0069] Specifically, Figure 1 , Figure 3-8 and Fig.11 As shown, the airflow circulation mechanism 4 is composed of an air outlet and an air return portion, the air outlet includes an annular tube 41 rotatably mounted between the two side frames 1 and guide wheels 413 fixedly sleeved on the outer sides of both ends of the annular tube 41, one end of the annular tube 41 is sealed, and an air distribution pipe 42 sleeved on the outside of the annular tube 41 is fixedly arranged between the two guide wheels 413, wherein the distance between the two guide wheels 413 is equal to the width of the paint coating on the surface of the airbag base fabric, and the diameter of the guide wheel 413 is equal to the diameter of the guide roller 2, while the outer diameter of the air distribution pipe 42 is smaller than the diameter of the guide wheel 413, so that when the guide wheel 413 is used to assist in the transmission of the airbag base fabric, the air distribution pipe 42 rotating synchronously with the guide wheel 413 will not scratch the paint coating on the surface of the airbag base fabric;

[0070] A plurality of evenly distributed annular gas outlet grooves 43 are formed on the outside of the gas distribution pipe 42, a plurality of evenly distributed annular gas outlet holes 45 are formed on the outside of the annular tube 41 at a position inside the gas distribution pipe 42, and a plurality of evenly distributed annular electric heating pipes 44 are fixedly embedded at a position inside the gas distribution pipe 42 on the outside of the annular tube 41;

[0071] The air outlet portion also includes an inclined platform 411 fixed to the inner side of the cover frame 7 and a plurality of equally spaced partition plates 49, each of which is inclined, and each of which is provided with a plurality of inclined air outlet holes 410 on its surface, and the air outlet holes 410 on two adjacent partition plates 49 are staggered, wherein a concave arc-shaped air guide surface is provided on the top of one side of each partition plate 49 facing the conveying direction of the airbag base fabric, so that the hot air entering the secondary drying and curing area is blown toward the inclined partition plate 49, and a part of the hot air will pass through the partition plate 49. The air outlet holes 410 on the plate 49 are tilted to blow toward the paint coating side of the airbag base fabric, and the other part flows back to the paint coating side of the airbag base fabric in the area under the action of the inclined surface and the arc-shaped air guide surface of the partition plate 49, so that the hot air entering the paint drying and curing chamber between each two adjacent partition plates 49 can stay longer, thereby improving the secondary drying and curing effect of the paint coating. The inclined platform 411 is hollow, and the inclined surface area of ​​the inclined platform 411 is provided with a plurality of V-shaped protrusions arranged in a gradient, and the inclined surface area of ​​the inclined platform 411 is provided with a plurality of air outlet grooves 412;

[0072] The return air part includes a return air pipe 46 arranged on the outside of the two side frames 1 and an intake pipe 48 rotatably connected to the open end of the ring tube 41. Both ends of the two return air pipes 46 are connected to the inclined platform 411 and the interior of the cover frame 7. A circulating pump is installed on the end of one of the return air pipes 46 away from the inclined platform 411, and a control valve is installed at the intake end of the intake pipe 48. A branch pipe 47 is provided to connect the intake pipe 48 to the corresponding return air pipe 46.

[0073] It should be noted that, in the process of drying and curing the paint coating on the surface of the airbag base fabric, when the airbag base fabric is Figure 2 When conveying in the conveying direction shown, a drying and curing chamber is formed between the airbag base fabric and the cover frame 7, and then the control valve on the air inlet pipe 48 is opened, and air is injected into the ring tube 41 through the air inlet pipe 48, so that the air passes through the air outlet hole 45 and enters the air distribution pipe 42. At the same time, the electric heating pipe 44 on the outside of the ring tube 41 is used to heat the air entering the air distribution pipe 42, and then as the guide wheel 413 rotates, the heated air is blown toward the paint coating side of the airbag base fabric and the inclined surface side of the inclined platform 411 in different directions through the air outlet groove 43, and with the help of the special structural design of the inclined surface side of the inclined platform 411, the hot air is guided to blow back to the paint coating side of the airbag base fabric;

[0074] When the hot air in the primary drying and curing area is transferred to the secondary drying and curing area under the guidance of the cover frame 7, and the paint coating on the surface of the airbag base fabric is fully dried and cured, the hot air will enter the return air pipe 46 under the action of the circulation pump, and then enter the hollow cavity on the inclined platform 411 and the air inlet pipe 48 respectively. The hot air entering the hollow cavity on the inclined platform 411 will pass through the second air outlet groove 412 on it and blow toward the paint coating side of the airbag base fabric in different directions, which can effectively prolong the time of the hot air sprayed from the air pipe 42 in the primary drying and curing area, thereby improving the primary drying and curing effect of the paint coating.

[0075] Among them, after a certain amount of air is introduced into the inside of the ring tube 41 through the air inlet pipe 48, the control valve on the air inlet pipe 48 can be closed, so that the hot air inside the entire drying and curing chamber is in a continuous circulation process under the action of the circulation pump, so as to fully utilize the heat in the hot air and reduce energy waste.

[0076] Specifically, Figure 2 and Fig. 9 As shown, a cutting mechanism 5 for trimming the coated airbag base fabric is installed at a position corresponding to one of the guide rollers 2 between the two side frames 1. The cutting mechanism 5 includes an arc cover 51 fixed between the two side frames 1 and concentrically arranged with the corresponding guide roller 2, and an annular groove 54 opened on the outer side of the two ends of the corresponding guide roller 2. An arc strip 53 is fixedly provided on the inner side of the arc cover 51 at positions corresponding to both sides of the annular groove 54. An arc cutter 52 is fixedly provided between one end of the two arc strips 53 located on both sides of the annular groove 54. The arc length of the arc cutter 52 is smaller than the arc length of the arc strip 53. After the airbag base fabric after the paint coating is dried and solidified enters the cutting station, the paint coating area and the non-paint coating area at the position of the airbag base fabric are pressed by the two arc strips 53 located on both sides of the annular groove 54. Then, as the airbag base fabric is transported, the arc cutter 52 is used to cut the cutting area in the process of being pressed and limited by the arc strip 53.

[0077] It should be noted that during the cutting process of the airbag base fabric after the paint coating is dried and solidified, the arc-shaped pressure strip 53 on the inner side of the arc cover 51 and the arc-shaped cutter 52 can be used in conjunction to separate the paint coating area and the non-paint coating area, and then the materials are classified and rolled up, so as to fully reuse the cut scraps and reduce waste.

[0078] In the above technical solution, the mentioned circulation pump adopts a BAXIT DC brushless micro vacuum pump for pumping gas; the mentioned control valve adopts a 4A310-10 air control valve for controlling the delivery of air medium.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An airbag base fabric coating, characterized in that: The raw materials for preparing the airbag base fabric coating include organic silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter, leveling agent and deionized water, the total amount of organic silicone resin, epoxy resin, silicone powder, compatibility regulator, adhesion promoter and leveling agent and deionized water are used in a ratio of 6:4, and the weight percentages of the above components are respectively 25-35% of organic silicone resin, 15-20% of epoxy resin, 8-12% of silicone powder, 35-40% of compatibility regulator, 2-5% of adhesion promoter and 0.8-1.2% of leveling agent; The preparation of the airbag base fabric coating specifically includes the following steps: S1: Add silicone resin and epoxy resin into a reaction kettle, disperse for 12-15 minutes, then add compatibility regulator, continue to disperse for 5-10 minutes, and obtain mixture A for standby use; S2: Add the adhesion promoter and the leveling agent to the mixture A in sequence, stir and disperse them thoroughly, and adjust the pH of the mixture to 8-8.5 to obtain a mixture B for use; S3: Add silicone powder to mixture B, stir thoroughly at a stirring speed of 500 r / min, and disperse until uniform and particle-free to obtain the target coating.

2. A coating machine for airbag base fabric coating, which is used to coat the airbag base fabric coating as claimed in claim 1 on the surface of the airbag base fabric, characterized in that: The glue coating machine comprises two side frames (1) arranged opposite to each other, a plurality of guide rollers (2) are rotatably mounted between the two side frames (1), a cover frame (7) is arranged between the two side frames (1), and a plurality of connecting strips (8) are fixedly connected between the two sides of the cover frame (7) and the corresponding side frames (1); A cloth tensioning mechanism (3) for longitudinally tensioning the airbag base cloth conveyed by the guide roller (2) is provided between the two sides of the cover frame (7) and the corresponding side frame (1); An air circulation mechanism (4) for drying and curing the coating on the surface of the airbag base fabric after coating is provided between the cover frame (7) and the two side frames (1). The air circulation mechanism (4) is composed of an air outlet and an air return portion.

3. The coating machine for coating airbag base fabric according to claim 2, characterized in that: The fabric tensioning mechanism (3) comprises a plurality of groups of cross bars (31) fixed on the inner side of the corresponding side frame (1), each group having two cross bars, and a conveyor belt (36) is connected between the two cross bars (31) in a transmission manner. The plurality of groups of cross bars (31) are arranged on both sides of the conveyed airbag base fabric, and two limit rings (32) for limiting the corresponding conveyor belt (36) are fixedly sleeved on the outer side of each cross bar (31). The connecting strip (8) is located on the inner side of the corresponding conveyor belt (36), and a plurality of tensioning components distributed at equal distances are installed on the outer side of the conveyor belt (36).

4. The coating machine for coating airbag base fabric according to claim 3, characterized in that: The cloth surface tensioning mechanism (3) further comprises a plurality of top strips (35) disposed on both sides of the conveyed airbag base fabric, the top strip (35) on one side of the airbag base fabric being directly opposite to the cover frame (7), and a straight rod (33) is fixedly connected between the top strip (35) and the cover frame (7), the top strip (35) on the other side of the airbag base fabric being staggered with the cover frame (7), and a U-shaped rod (34) is fixedly connected between the top strip (35) and the corresponding side frame (1).

5. The coating machine for coating airbag base fabric according to claim 4, characterized in that: The tensioning assembly comprises a core rod (37) fixedly passing through the corresponding conveyor belt (36) and an L-shaped seat (38) attached to the outer side of the corresponding conveyor belt (36), and ear plates (39) are fixedly provided on the outer sides of both ends of the L-shaped seat (38) and are rotatably sleeved on the outer sides of the corresponding ends of the core rod (37); The L-shaped seat (38) is provided with a T-shaped slot (310) on the inner side, a T-shaped block is slidably mounted inside the T-shaped slot (310), one end of the T-shaped block extending outside the T-shaped slot (310) is fixedly connected with a tightening block (311), a guide rod (312) movably penetrating the corresponding tightening block (311) is also fixedly provided on the inner side of the L-shaped seat (38), a spring (313) movably sleeved outside the guide rod (312) and fixedly connecting the corresponding tightening block (311) and the inner wall of the L-shaped seat (38), and the top bar (35) is in contact with the tightening block (311) which moves with the conveyor belt (36) to the area where the corresponding top bar (35) is located.

6. The coating machine for coating airbag base fabric according to claim 2, characterized in that: The air outlet portion comprises an annular cylinder (41) rotatably mounted between two side frames (1) and guide wheels (413) fixedly sleeved on the outside of both ends of the annular cylinder (41); one end of the annular cylinder (41) is sealed, and an air distribution pipe (42) sleeved on the outside of the annular cylinder (41) is fixedly arranged between the two guide wheels (413); The outer side of the air distribution pipe (42) is provided with a plurality of air outlet grooves (43) evenly distributed in an annular shape, the outer side of the annular tube (41) is provided with a plurality of air outlet holes (45) evenly distributed in an annular shape, and the outer side of the annular tube (41) is provided with a plurality of electric heating tubes (44) evenly distributed in an annular shape fixedly embedded in a position inside the air distribution pipe (42); The air outlet portion further comprises an inclined platform (411) fixed to the inner side of the cover frame (7) and a plurality of equally spaced partition plates (49), each of which is inclined, and a plurality of inclined air outlet holes (410) are provided through the surface of each partition plate (49), the air outlet holes (410) on two adjacent partition plates (49) are staggered, the inclined platform (411) is hollow, a plurality of gradient V-shaped protrusions are provided on the inclined surface area of ​​the inclined platform (411), and a plurality of air outlet grooves (412) are provided on the inclined surface area of ​​the inclined platform (411).

7. The coating machine for coating airbag base fabric according to claim 6, characterized in that: The return air section comprises a return air pipe (46) arranged outside the two side frames (1) and an intake pipe (48) rotatably connected to the open end of the ring tube (41), both ends of the two return air pipes (46) are connected to the inclined platform (411) and the inside of the cover frame (7), a circulation pump is installed on the end of one of the return air pipes (46) away from the inclined platform (411), a control valve is installed at the intake end of the intake pipe (48), and a branch pipe (47) is provided to connect the intake pipe (48) and the corresponding return air pipe (46).

8. The coating machine for coating airbag base fabric according to claim 2, characterized in that: The airbag base fabric inlet end of the cover frame (7) is provided with a coating mechanism (6) for coating the paint on the surface of the airbag base fabric. The coating mechanism (6) comprises a notch provided at the end of the cover frame (7). A hopper (61) is fixedly mounted inside the notch. A blocking strip (62) is provided inside the discharge end of the hopper (61). A discharge control component for controlling the outflow of the paint is provided between the hopper (61) and the corresponding fabric tensioning mechanism (3).

9. The coating machine for coating airbag base fabric according to claim 8, characterized in that: The material discharging control assembly comprises a through slot (63) penetrating through both sides of the hopper (61), and a J-shaped bar (64) is movably provided inside the two through slots (63), one end of the J-shaped bar (64) located inside the hopper (61) is fixedly connected to the outer side of the corresponding end of the blocking bar (62), and the other end of the J-shaped bar (64) located outside the hopper (61) extends to the corresponding cloth tensioning mechanism (3); The material discharging control assembly further comprises a guide frame 1 (65) and a guide frame 2 (66) fixedly arranged on both sides of the hopper (61); a guide rod 2 (67) fixedly arranged on the outside of the J-shaped bar (64) is movably provided on the guide frame 1 (65); a spring 2 (68) fixedly connected to the corresponding J-shaped bar (64) and the guide frame 1 (65) is movably sleeved on the outside of the guide rod 2 (67); one end of the J-shaped bar (64) located outside the hopper (61) is movably provided inside the guide frame 2 (66).

10. The coating machine for airbag base fabric coating according to claim 2, characterized in that: A cutting mechanism (5) for trimming the coated airbag base fabric is installed at a position corresponding to one of the guide rollers (2) between the two side frames (1). The cutting mechanism (5) comprises an arc cover (51) fixed between the two side frames (1) and arranged concentrically with the corresponding guide roller (2), and an annular groove (54) opened on the outer sides of both ends of the corresponding guide roller (2). An arc-shaped pressure strip (53) is fixedly provided at positions on the inner side of the arc cover (51) corresponding to both sides of the annular groove (54), and an arc-shaped cutting knife (52) is fixedly provided between one ends of the two arc-shaped pressure strips (53) located on both sides of the annular groove (54).

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