Equipment for manufacturing helmet liner through stretching process and manufacturing method thereof

Abstract

The equipment comprises a cloth heating jig and a cloth pre-pressing jig, the cloth heating jig comprises a first rack, a control cabinet, a lower positioning plate and an upper shaping plate, the lower positioning plate is arranged on the first rack, the upper shaping plate is hinged to the lower positioning plate, and the cloth pre-pressing jig is arranged on the lower positioning plate. First positioning seats are arranged on the two sides of the upper shaping plate, second positioning seats are arranged on the left side and the right side of the first rack, overturning air cylinders are hinged to the second positioning seats, piston rods of the overturning air cylinders are connected with swing rods, the upper portions of the swing rods are hinged to the first positioning seats, a heat insulation plate is arranged on the upper shaping plate, and a heating plate is arranged on the lower positioning plate. The cloth pre-pressing jig comprises a second rack, a control rod, a positioning rod, a cross beam, a positioning beam, an upgrading air cylinder, a first guide rod, an upper positioning disc, an upper arc-shaped pressing die and a lower arc-shaped female die, and a positioning ring is arranged on the outer side of the lower arc-shaped female die. The helmet processed by the process is more stable in performance.

Description

Technical Field

[0001] The invention relates to the technical field of helmet processing, in particular to a device for manufacturing a helmet liner by a stretching process and a manufacturing method thereof. Background Art

[0002] An anti-theft helmet is generally composed of multiple textile fabric layers embedded in a matrix and bonded to each other through the matrix. The multiple textile fabric layers can also be called a helmet liner. Currently, the multiple textile fabric layers are generally disordered in warp and weft. Due to the disordered warp and weft during assembly and the inconsistent surface density around the helmet body due to the different number of layers, the performance was found to be unstable (poor consistency) during the anti-fragmentation test (the bullet was shot in a circle). Therefore, the bulletproof performance of this type of helmet liner is not stable enough and needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a device for making a helmet liner by a stretching process and a method for making the same, so as to solve the problem in the prior art that the performance of the helmet liner is not stable enough due to the disordered warp and weft directions of the multi-layer textile fabric layers in the processing process, the disordered warp and weft directions when combined, and the inconsistent surface density around the helmet body due to the different number of layers.

[0004] To achieve the above object, the present invention provides the following technical solution: An apparatus for manufacturing a helmet inner liner by a stretching process, comprising a fabric heating fixture and a fabric pre-pressing fixture. The fabric heating fixture includes a first frame, a control cabinet, a lower positioning plate, and an upper shaping plate. The lower positioning plate is disposed on the first frame. The rear of the upper shaping plate is hinged to the lower positioning plate by two hinges. A positioning seat one is disposed on each side of the upper shaping plate. A positioning seat two is disposed on each of the left and right sides of the first frame. A turning cylinder electrically connected to the control cabinet is hinged to each positioning seat two. A swing rod is connected to the piston rod of the turning cylinder. The upper part of the swing rod is hinged to the corresponding positioning seat one through a rotating shaft. When the swing rod works with the turning cylinder, it drives the upper shaping plate to turn up and down with the hinge as the hinge point. A heat insulation plate is disposed on the lower surface of the upper shaping plate. A heating plate electrically connected to the control cabinet is disposed on the upper surface of the lower positioning plate. The fabric pre-pressing fixture includes a second frame, a lifting cylinder, and a control rod for controlling the operation of the lifting cylinder. Two positioning rods are disposed above the second frame. A cross beam is fixed between the two positioning rods. A positioning beam is fixed above the cross beam. The lifting cylinder is fixed on the positioning beam. Two guide rods one are fixed in front and behind the cross beam. A upper positioning disk located below the cross beam is fixed between the four guide rods one. The piston rod of the lifting cylinder sequentially penetrates through the positioning beam and the upper positioning disk and then is connected to an upper arc-shaped pressing die. A lower arc-shaped concave die located directly below the upper arc-shaped pressing die is also fixed on the second frame. A ring-shaped positioning ring is disposed outside the lower arc-shaped concave die. The upper surface of the positioning ring is flush with the opening of the lower arc-shaped concave die.

[0005] Preferably, in order to solve the problem that the position deviation during mold closing affects the shaping effect, four guide rods two are disposed below the upper positioning disk. A guide positioning disk is disposed between the guide rods two. A guide through hole facilitating the penetration of the upper arc-shaped pressing die is disposed on the guide positioning disk.

[0006] Preferably, for convenient operation, an operating table is fixed to the side of the first frame. A heating switch, a rising button, and a descending button electrically connected to the control cabinet are disposed on the operating table. A display screen, a start button, and an emergency stop button are disposed above the control cabinet.

[0007] Preferably, in order to avoid damaging the fabric, a layer of heat-conducting cloth is disposed above the heating plate.

[0008] Preferably, a "U"-shaped hinge frame sleeved outside the positioning seat one is disposed above the swing rod.

[0009] The present invention also discloses a manufacturing method for manufacturing a helmet inner liner by a stretching process, including the apparatus for manufacturing a helmet inner liner by a stretching process as described above. The specific steps are as follows:

[0010] S1. First, use the fabric heating fixture to heat the fabric and place the fabric flat on the heating plate; then drive the two flip cylinders to work, drive the upper shaping plate to flip and press down until it fits with the heating plate, so as to heat the fabric and flatten it at the same time. Finally, the helmet liner needs several layers, and the multiple layers of fabric are heated and flattened in turn; the heated and flattened fabrics are stacked together to keep the warp and weft directions consistent;

[0011] S2. Use a fabric pre-pressing jig to perform pre-forming stretching treatment. After heating the fabric, lay the heated and flattened fabric flat on the upper surface of the opening of the lower arc-shaped concave mold. Then start the control lever to make the upgrade cylinder work, drive the upper arc-shaped pressing mold to move downward, and realize the mold closing with the lower arc-shaped concave mold. During the mold closing process, the flattened fabric will be stretched and shaped to form the shape of the helmet;

[0012] S3. After the pre-pressing is completed, the helmet is placed in the main pressing mold for re-hot pressing to form the final helmet body.

[0013] Preferably, in step S1, the number of layers used for each heating stretching is selected based on the type and weight of the material, and finally the number of layers for each stretching is determined based on the effect of the test stretching; and the heating temperature is set between 100-120°C depending on the material and the number of layers.

[0014] Preferably, in step S2, after the pressing scheme is determined, a certain number of layers of stretched fabrics or a certain weight of fabrics are counted, and then placed into a fabric pre-pressing jig for pre-pressing to form a helmet body with a certain strength and a distinct helmet body shape.

[0015] Preferably, the thickness of a certain number of layers of stretched fabric after stacking needs to be about 1 mm greater than that of the finished helmet body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adopts a stretching process, so that the material stacking is consistent in warp and weft, the surface density of each position around the helmet body is basically consistent and consistent in warp and weft, the bulletproof and anti-fragmentation performance is significantly improved, and the overall performance is finally more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the fabric heating fixture in Embodiment 1;

[0019] Figure 2 This is a schematic diagram of the structure of the cloth pre-pressing fixture in this embodiment 1;

[0020] Figure 3 Schematic diagram of the structure of the fabric heating fixture in Embodiment 2.

[0021] In the figure: fabric heating jig 1, fabric pre-pressing jig 2, first frame 101, control cabinet 102, lower positioning plate 103, upper shaping plate 104, first positioning seat 105, second positioning seat 106, tilting cylinder 107, swing rod 108, rotating shaft 109, hinge 110, heat insulation plate 111, heating plate 112, second frame 201, upgrading cylinder 202, control rod 203, positioning rod 204, cross beam 205, first guide rod 206, upper positioning disc 207, positioning beam 209, upper arc-shaped pressing die 208, lower arc-shaped concave die 210, positioning ring 211, second guide rod 212, guide positioning disc 213, guide through hole 214, operating table 3, heating switch 4, up button 5, down button 6, display screen 7, start button 8, emergency stop button 9, heat conductive cloth 10, "凵"-shaped hinge bracket 11. Specific implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1

[0024] Please refer to Figure 1-Figure 2As shown, the present embodiment provides a device for making a helmet liner by a stretching process, comprising a fabric heating jig 1 and a fabric pre-pressing jig 2, wherein the fabric heating jig 1 comprises a frame 101, a control cabinet 102, a lower positioning plate 103 and an upper shaping plate 104, wherein the lower positioning plate 103 is arranged on the frame 101, and the rear of the upper shaping plate 104 is hinged to the lower positioning plate 103 by two hinges 110, and a positioning seat 105 is arranged on both sides of the upper shaping plate 104, and the frame 101 is provided with a plurality of positioning seats 105, wherein the upper shaping plate 104 is provided with a plurality of positioning seats 105, and the upper shaping plate 104 ... 1 is provided with a positioning seat 2 106 on both sides, and a flip cylinder 107 electrically connected to the control cabinet 102 is hinged on each positioning seat 2 106, and a swing rod 108 is connected to the piston rod of the flip cylinder 107, and the upper part of the swing rod 108 is hinged with the corresponding positioning seat 105 through a rotating shaft 109. When the swing rod 108 works with the flip cylinder 107, the upper shaping plate 104 is driven to flip up and down with the hinge 110 as the hinge point, and a heat insulation board 111 is provided on the lower surface of the upper shaping plate 104. A heating plate 112 electrically connected to the control cabinet 102 is arranged on the upper surface of the lower positioning plate 103. The cloth pre-pressing jig 2 includes a frame 201, an upgrade cylinder 202 and a control rod 203 for controlling the operation of the upgrade cylinder 202. Two positioning rods 204 are arranged above the frame 201, a crossbeam 205 is fixed between the two positioning rods 204, a positioning beam 209 is fixed above the crossbeam 205, the upgrade cylinder 202 is fixed on the positioning beam 209, and the front and rear of the crossbeam 205 are fixed with the upgrade cylinder 202. Two guide rods 206 are fixed, and an upper positioning plate 207 located below the cross beam 205 is fixed between the four guide rods 206. The piston rod of the upgrading cylinder 202 passes through the positioning beam 209 and the upper positioning plate 207 in sequence and is connected to the upper arc-shaped pressing die 208. A lower arc-shaped die 210 located directly below the upper arc-shaped pressing die 208 is also fixed on the frame 201, and an annular positioning ring 211 is arranged on the outer side of the lower arc-shaped die 210, and the upper surface of the positioning ring 211 is arranged flush with the opening of the lower arc-shaped die 210.

[0025] Preferably, in order to prevent the problem of position displacement during mold closing and affecting the shaping effect, four guide rods 212 are arranged below the upper positioning plate 207, and a guide positioning plate 213 is arranged between the guide rods 212. The guide positioning plate 213 is provided with a guide through hole 214 for the upper arc-shaped die 208 to pass through.

[0026] Preferably, for convenient operation, an operation table 3 is fixed to the side of the frame 101. A heating switch 4, a rising button 5, and a descending button 6 electrically connected to the control cabinet 102 are arranged on the operation table 3. Above the control cabinet 102, a display screen 7, a start button 8, and an emergency stop button 9 are provided.

[0027] Preferably, above the swing rod 108, a "U"-shaped hinge bracket 11 sleeved outside the positioning seat 105 is provided.

[0028] This embodiment also discloses a manufacturing method for manufacturing a helmet inner liner by a stretching process, including the device for manufacturing a helmet inner liner by a stretching process as described above, and is characterized in that the specific steps are as follows:

[0029] S1. First, use the fabric heating fixture 1 to heat the fabric, and place the fabric flat above the heating plate 112; then drive the two flipping cylinders 107 to work, driving the upper shaping plate 104 above to flip down until it fits with the heating plate 112, realizing heating the fabric and also flattening it. And for each layer of fabric that the final helmet inner liner requires, heat and flatten them separately in sequence; stack the heated and flattened fabrics together and keep the warp and weft directions consistent.

[0030] S2. Use the fabric pre-pressing fixture 2 for pre-forming and stretching treatment. After heating the fabric, place the heated and flattened fabric flat on the upper surface of the opening of the lower arc-shaped female die 210, and then start the control lever 203 to make the lifting cylinder 202 work, driving the upper arc-shaped male die 208 above to move down, realizing closing the die with the lower arc-shaped female die 210. During the die closing process, the laid fabric will be stretched and shaped into the shape of a helmet.

[0031] S3. After pre-pressing, put it into the main pressing die for reheating and pressing to form the final helmet body, and the helmet body completed in this step has the same size as the finished helmet to be processed.

[0032] Preferably, in step S1, the number of layers used for each heating and stretching is selected through tests according to the type and gram weight of the material, and finally the number of layers for each stretching is determined according to the stretching effect of the test; and the heating temperature is set between 100 - 120 °C according to the material and the number of layers.

[0033] Preferably, in step S2, after determining the pressing scheme, count a certain number of layers of stretched fabric or weigh a certain weight of fabric, and then put it into the fabric pre-pressing fixture 2 for pre-pressing to form a helmet body with a certain strength and an obvious helmet shape.

[0034] Preferably, the thickness of the stacked stretched fabric of a certain number of layers is about 1 mm larger than the finished helmet body.

[0035] The specific working principle of the present invention is as follows: the cloth is heated and softened, and the cloth is placed flat on the heating plate 112; then the two flip cylinders 107 are driven to work, driving the upper shaping plate 104 to flip and press down until it fits with the heating plate 112, so as to heat the cloth and also flatten it, and finally the helmet liner needs several layers, and the multiple layers of cloth are heated and flattened in turn; the heated and flattened cloth are stacked together to keep the warp and weft directions consistent, and then after the cloth is heated, the heated and flattened cloth is laid flat on the upper surface of the opening of the lower arc-shaped concave mold 210, and then the control rod 203 is started to make the upgrading cylinder 202 work, driving the upper arc-shaped pressing mold 208 to move downward, The mold is closed with the lower arc-shaped concave mold 210, and after the mold is closed, the cloth is pressed firmly on all sides and tightened. After being tightened, it is slowly pulled to achieve the stretching effect, and finally the flat cloth is stretched and shaped to form the shape of the helmet during the mold closing process. Therefore, the present invention adopts a preheating, flattening and stretching process for the cloth, so that the material stacking is consistent in the warp and weft directions, and the surface density of each position around the helmet body is basically consistent and consistent in the warp and weft directions, so the bulletproof and anti-fragment performance is significantly improved, and finally the overall performance of the helmet is improved. Experiments have proved that the bulletproof performance of the helmet liner prepared by the present invention meets the level 2 requirement in GA293-2012, and the V50 value of anti-1.1g fragments is improved by 12% compared with the conventional process.

[0036] Example 2

[0037] See also Figure 3 As shown, the present embodiment provides a device for making a helmet liner by a stretching process. Preferably, in order to avoid damaging the fabric, a layer of heat-conducting fabric 10 is provided above the heating plate 112. The heat-conducting fabric 10 is provided to avoid the problem of placing the fabric directly on the heating plate 112 and directly contacting the fabric to damage the fabric.

Claims

1. A device for making helmet liner by stretching process, characterized in that: The invention comprises a cloth heating jig (1) and a cloth pre-pressing jig (2), wherein the cloth heating jig (1) comprises a frame (101), a control cabinet (102), a lower positioning plate (103) and an upper shaping plate (104), wherein the lower positioning plate (103) is arranged on the frame (101), the rear of the upper shaping plate (104) is hinged to the lower positioning plate (103) through two hinges (110), a positioning seat (105) is arranged on both sides of the upper shaping plate (104), and a positioning seat (106) is arranged on both sides of the frame (101). ), each positioning seat (106) is hinged with a flip cylinder (107) electrically connected to the control cabinet (102), the piston rod of the flip cylinder (107) is connected with a swing rod (108), the upper part of the swing rod (108) is hinged with the corresponding positioning seat (105) through a rotating shaft (109), when the swing rod (108) works with the flip cylinder (107), the upper shaping plate (104) is driven to flip up and down with the hinge (110) as the hinge point, the lower surface of the upper shaping plate (104) is provided with a heat insulation plate (111), and the upper surface of the lower positioning plate (103) is provided with a heat insulation plate (111). A heating plate (112) electrically connected to the control cabinet (102) is provided, the cloth pre-pressing jig (2) comprises a frame 2 (201), an upgrade cylinder (202) and a control rod (203) for controlling the operation of the upgrade cylinder (202), two positioning rods (204) are provided above the frame 2 (201), a crossbeam (205) is fixed between the two positioning rods (204), a positioning beam (209) is fixed above the crossbeam (205), the upgrade cylinder (202) is fixed on the positioning beam (209), and two crossbeams (209) are fixed before and after the crossbeam (205). A guide rod (206) is provided, and an upper positioning plate (207) is fixed between the four guide rods (206) and is located below the cross beam (205). The piston rod of the upgrade cylinder (202) passes through the positioning beam (209) and the upper positioning plate (207) in sequence and is connected to an upper arc-shaped pressing die (208). A lower arc-shaped concave die (210) is also fixed on the frame (201) and is located directly below the upper arc-shaped pressing die (208). An annular positioning ring (211) is provided on the outer side of the lower arc-shaped concave die (210), and the upper surface of the positioning ring (211) is arranged flush with the opening of the lower arc-shaped concave die (210).

2. The device for making helmet liner by stretching process according to claim 1, characterized in that: Four guide rods (212) are arranged below the upper positioning plate (207), a guide positioning plate (213) is arranged between the guide rods (212), and a guide through hole (214) is arranged on the guide positioning plate (213) for the upper arc-shaped die (208) to pass through.

3. The equipment for making helmet liner by stretching process according to claim 1 or 2, characterized in that: An operating table (3) is fixed to the side of the said frame one (101). A heating switch (4), a rising button (5) and a descending button (6) which are electrically connected to the control cabinet (102) are arranged on the said operating table (3). Above the said control cabinet (102), a display screen (7), a start button (8) and an emergency stop button (9) are arranged.

4. The device for making a helmet liner by a stretching process according to claim 3, characterized in that: A layer of heat-conducting cloth (10) is arranged above the said heating plate (112).

5. The device for making helmet liner by stretching process according to claim 3, characterized in that: Above the said swing rod (108), a "U"-shaped hinge bracket (11) sleeved outside the positioning seat one (105) is arranged.

6. A method for manufacturing a helmet liner by a stretching process, comprising a device for manufacturing a helmet liner by a stretching process according to any one of claims 1 to 5, characterized in that: The specific steps are as follows: S1. First, use the cloth heating fixture (1) to heat the cloth, and place the cloth flat above the heating plate (112); then drive the two flipping cylinders (107) to work, drive the upper shaping plate (104) above to flip and press down until it fits the heating plate (112), so as to heat the cloth and at the same time flatten it. And for each layer of cloth that the helmet inner liner needs, heat and flatten the multi-layer cloth respectively in sequence; stack the heated and flattened cloth together to keep the warp and weft directions consistent; S2. Use the cloth pre-pressing fixture (2) to perform pre-forming stretching treatment. After the cloth is heated, lay the heated and flattened cloth on the upper surface of the opening of the lower arc-shaped female die (210), and then start the control rod (203) to make the lifting cylinder (202) work, drive the upper arc-shaped pressing die (208) above to move down, so as to realize the closing of the die with the lower arc-shaped female die (210). During the die closing process, the laid cloth will be stretched and shaped to form the shape of the helmet; S3. After the pre-pressing is completed, put it into the main pressing die for reheating and pressing to form the final helmet body, and the size of the helmet body completed in this step is the same as that of the finished helmet to be processed.

7. The method for making a helmet liner by a stretching process according to claim 6, characterized in that: In step S1, the number of layers used for each heating and stretching is selected through tests according to the type and gram weight of the material, and finally the number of layers for each stretching is determined according to the stretching effect of the test; and the heating temperature is set between 100°C and 120°C according to the material and the number of layers.

8. The method for making a helmet liner by a stretching process according to claim 6, characterized in that: In step S2, after determining the pressing scheme, count a certain number of layers of stretched cloth or weigh a certain weight of cloth, and then put it into the cloth pre-pressing fixture (2) for pre-pressing to form a helmet body with a certain strength and an obvious helmet body shape.

9. The method for manufacturing a helmet liner by a stretching process according to claim 8, characterized in that: The thickness of a certain number of layers of stacked stretched cloth needs to be about 1 mm larger than the finished helmet body.

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