A sole and upper pressing device and method

Abstract

The present invention belongs to the technical field of shoemaking equipment, and specifically relates to a sole and upper pressing device and method, wherein the sole and upper pressing device comprises a bottom support mechanism, two pressing mold cavities relatively arranged on the bottom support mechanism, a pressing air bag arranged in the pressing mold cavity, and two mold cavity power mechanisms relatively arranged on the bottom support mechanism; the pressing mold cavity comprises a bottom plate, an outer plate, a top plate, an inner plate, and two end plates, and the bottom plate, the outer plate, the top plate, the inner plate, and the two end plates together form a cavity for accommodating the pressing air bag, the inner plate of the pressing mold cavity is contoured, and a through groove or a plurality of through holes are arranged on the inner plate, and an auxiliary force-applying component is arranged at the force-applying part of the pressing air bag, and the bottom support mechanism comprises a support plate and a plurality of floating support strips arranged side by side on the support plate in the front-rear direction. The present invention increases the pressure of the pressing air bag on the gluing part of the sole and upper, has a good pressing effect, and the gluing of the sole and upper is more uniform.

Description

Technical Field

[0001] The invention relates to a sole and upper pressing device and method, belonging to the technical field of shoe-making equipment. Background Art

[0002] In the process of shoe production, the gluing of the sole and the upper is a crucial step. The gluing effect of the sole and the upper directly affects the quality, appearance and service life of the product. The gluing of the sole and the upper mainly relies on manual operation: first, the worker applies glue around the top of the inner side of the sole and around the bottom of the outer side of the upper with the shoe last, then places the upper on the sole and aligns it, and then uses both hands with the help of tooling to apply pressure to the gluing point of the sole and the upper and maintains it for a period of time, so that the glue is initially solidified and fixed, and then the shoes are placed in a heating device to further solidify the glue. Since it is difficult to ensure the uniformity of the pressing force during manual pressing operations, it is easy to cause the local gluing effect to deteriorate. In order to avoid this, workers need to press the glued parts little by little, resulting in reduced work efficiency.

[0003] In order to improve production efficiency, many shoe production lines use pressing equipment to perform preliminary pressing of the sole and upper. The pressing equipment used for preliminary pressing of the sole and upper is generally provided with a side pressing mechanism, a front pressing mechanism and a rear pressing mechanism of a profiling type. The side pressing plates, the front pressing plates and the rear pressing plates of the side pressing mechanism, the front pressing mechanism and the rear pressing mechanism are assembled to form a pressing space similar to the shape of the shoe. When preliminary pressing of the sole and upper is required, the side pressing plates, the front pressing plates and the rear pressing plates of the side pressing mechanism, the front pressing mechanism and the rear pressing mechanism are driven by their respective power mechanisms to approach the shoe, and pressure is applied to the bonding part of the sole and the upper from the side, the front and the back, respectively, to achieve preliminary pressing of the sole and the upper, which improves production efficiency compared to manual pressing by workers. However, since the shape of the shoe is not very regular, and the side pressing plates, the front pressing plates and the rear pressing plates used cannot be deformed accordingly according to the shape of the shoe, which may cause the pressing force in the irregular areas of the shoe to be not very uniform, affecting the pressing effect.

[0004] Therefore, it is a technical problem that technicians in this field urgently need to solve to find a sole and upper pressing device and method to improve the pressing force at the actual bonding point between the sole and the upper. Summary of the invention

[0005] The present invention aims at the defects of the prior art and provides a sole and upper pressing device and method.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] One of the purposes of the present invention is to provide a sole and upper pressing device, comprising a bottom support mechanism, two pressing mold cavities arranged relatively on the bottom support mechanism, a pressing air bag arranged in the pressing mold cavities, and two mold cavity power mechanisms arranged relatively on the bottom support mechanism; the pressing mold cavity is movably arranged on the bottom support mechanism, and the mold cavity power mechanism drives the two pressing mold cavities to approach or move away from each other, so that a pressing space similar in shape to the gluing position of the sole and upper is formed between the two adjacent pressing mold cavities, The pressing mold cavity includes a bottom plate, an outer plate, a top plate, an inner plate and two end plates, which together form a cavity for accommodating the pressing airbag. The inner plate of the pressing mold cavity is contoured, and the inner plate is provided with a through groove or a plurality of through holes for the force-applying part of the pressing airbag to apply force to the gluing part of the sole and upper. An auxiliary force-applying component is provided at the force-applying part of the pressing airbag, and the bottom support mechanism includes a support plate and a plurality of floating support strips arranged side by side on the support plate in the front-to-back direction.

[0008] On the basis of the above technical solution, the present invention can also make the following improvements:

[0009] Furthermore, the auxiliary force-applying component includes a pressure strip, which is installed on the force-applying portion of the pressed airbag and is arranged on the outer side of the through groove.

[0010] The beneficial effect of adopting the above further technical solution is that by applying pressure to the bonding point of the sole and the upper through the pressure strip, the pressure can be applied more concentratedly to the bonding point of the sole and the upper, and the pressing force is more uniform.

[0011] Furthermore, the pressure strip is in an elastic band-like structure.

[0012] The beneficial effect of adopting the above further technical solution is that the pressure strip of the elastic band structure can be deformed as the shape of the shoe changes, better fit the bonding point of the sole and upper, and apply force more evenly.

[0013] Furthermore, the auxiliary force-applying assembly includes multiple groups of connecting blocks 1 and pressing blocks 1, wherein the connecting blocks 1 are installed on the force-applying portion of the pressed airbag, the connecting blocks 1 pass through the through holes and are connected to the pressing blocks 1, and the shape of the connecting blocks 1 is adapted to the shape of the through holes.

[0014] The beneficial effect of adopting the above-mentioned further technical scheme is that the force-applying part of the pressed airbag is connected to the pressing block one through the connecting block one, and the pressed airbag expands to apply pressure to the bonding place of the sole and the upper through multiple pressing blocks one, so that the pressure can be applied more evenly to the bonding place of the sole and the upper, and the connecting block one is connected to the pressing block one through the through hole. When the pressed airbag expands and pushes the connecting block one to move, the through hole can provide a guiding effect on the movement of the connecting block one, thereby limiting the shaking of the connecting block one during the movement, so that the pressing block one can be accurately pressed on the bonding place of the sole and the upper, so that the pressing force of the pressing block one on the bonding place of the sole and the upper is more concentrated.

[0015] Furthermore, the connecting block 1 is made of nylon, and the pressing block 1 is made of elastic material.

[0016] The beneficial effects of adopting the above further technical solution are: the pressure block 1 made of elastic material can deform as the shape of the shoe changes, better fit the bonding place of the sole and upper, and apply force more evenly; the connecting block 1 made of nylon material has strength and can better press the pressure block 1 against the bonding place of the sole and upper.

[0017] Furthermore, the mold cavity power mechanism includes a lateral cylinder and a slide plate, the slide plate is movably mounted on the support plate, the pressing mold cavity is mounted on the slide plate, and the piston rod end of the lateral cylinder is connected to the slide plate.

[0018] The beneficial effect of adopting the above-mentioned further technical scheme is: the lateral cylinder and the slide plate drive the two pressing mold cavities to move closer to each other, so that a pressing space similar in shape to the bonding point of the sole and upper is formed between the two pressing mold cavities, so that the pressure of the pressing airbag is more concentrated on the bonding point of the sole and upper; after the pressing is completed, the lateral cylinder and the slide plate drive the two pressing mold cavities to move away from each other, making it convenient to take out the shoes.

[0019] Furthermore, the bottom of the floating support bar is floatingly mounted on the support plate via a support spring.

[0020] The beneficial effect of adopting the above-mentioned further technical solution is that the floating support bar is installed through the supporting spring. When the sole is placed on the floating support bar, the floating support bar can float up and down according to the shape of the sole, and is supported by the supporting spring, so that the floating support bar is more adapted to the shape of the sole and provides good support for the sole.

[0021] A second object of the present invention is to provide a sole-and-upper pressing method, which uses the sole-and-upper pressing device as described above and specifically includes the following steps:

[0022] Step 1: Place the glued sole on the floating support strip, and then place the glued upper with the shoe last on the sole, and adjust and align the sole and the upper;

[0023] Step 2: Start the lateral cylinders on the left and right sides of the support plate, and the piston rods of the lateral cylinders extend, respectively driving the slides on the left and right sides of the support plate to move toward each other, driving the pressing mold cavities on the slides to approach each other to form a pressing space, and placing the sole and upper in the pressing space;

[0024] Step 3: Start the inflation of the compression airbag, and the compression airbag expands;

[0025] Step 4: The expanded pressing airbag is restricted by the bottom plate, the outer plate, the top plate, the inner plate and the two end plates of the pressing mold cavity, and the pressing airbag expands and extrude outward from the through groove or the pressing airbag extrude the through hole of the connecting block, thereby driving the pressure strip or the pressing block to apply pressure to the gluing part of the sole and the upper, and maintaining it for 10 seconds to 30 seconds;

[0026] Step 5: The pressing airbag contracts, and the piston rod of the lateral cylinder retracts, driving the two slide plates to move away from each other, driving the pressing mold cavities on the slide plates to move away from each other, taking out the pressed shoes, and putting them into the subsequent heating equipment for further curing;

[0027] Step 6. Repeat steps 1 to 5 to press the next shoe.

[0028] Furthermore, in the step 4, the pressure of the pressed airbag is 3 bar-6 bar.

[0029] The beneficial effect of the present invention is that: by arranging the pressing airbag in the pressing mold cavity, when the pressing airbag is inflated, since most of the pressing airbag is restricted by the pressing mold cavity, only the pressing part of the pressing airbag can be expanded and squeezed out through the through groove or the through hole, thereby reducing the contact area between the pressing airbag and the sole and upper, and making the pressure of the pressing airbag better concentrated on the bonding part of the sole and upper, thereby increasing the pressure of the pressing airbag on the bonding part of the sole and upper, achieving a better pressing effect and more uniform bonding of the sole and upper. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A top view of the sole and upper pressing device of the present invention;

[0031] Figure 2 for Figure 1 AA cross-sectional view;

[0032] Figure 3 A cross-sectional view of the internal structure of the compression mold cavity of Example 1 of the present invention;

[0033] Figure 4 for Figure 3 The CC section view;

[0034] Figure 5 A cross-sectional view of the internal structure of the compression mold cavity of Example 2 of the present invention;

[0035] Figure 6 for Figure 5 DD cross-sectional view;

[0036] Figure 7 This is a schematic diagram of the pressing process of Example 3 of the present invention;

[0037] Figure 8 Schematic diagram of the internal structure of a shoe last according to Embodiment 3 of the present invention;

[0038] Fig. 9 for Figure 8 Enlarged view of point B.

[0039] The accompanying drawings are marked as follows: 11. Support plate; 12. Floating support bar; 13. Support spring; 2. Pressed mold cavity; 21. Bottom plate; 22. Outer plate; 23. Top plate; 24. Inner plate; 25. End plate; 26. Through groove; 27. Through hole; 3. Pressed airbag; 4. Cavity power mechanism; 41. Lateral cylinder; 42. Slide plate; 51. Pressing strip; 52. Pressing block one; 53. Connecting block one; 6. Sole; 7. Upper; 8. Last; 81. Airbag cavity; 82. Inner airbag; 83. Connecting block two; 84. Pressing block two. DETAILED DESCRIPTION

[0040] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0041] Example 1

[0042] See also Figure 1-4 , a sole and upper pressing device, comprising a bottom support mechanism, two pressing mold cavities 2 relatively arranged on the bottom support mechanism, a pressing airbag 3 arranged in the pressing mold cavity 2 and two cavity power mechanisms 4 relatively arranged on the bottom support mechanism; the pressing mold cavity 2 is movably arranged on the bottom support mechanism, and the cavity power mechanism 4 drives the two pressing mold cavities 2 to approach or move away from each other, and a pressing space similar in shape to the gluing position of the sole and upper is formed between the two adjacent pressing mold cavities 2, the pressing mold cavity 2 comprises a bottom plate 21, an outer plate 22, a top plate 23, an inner plate 24 and two end plates 25, the bottom plate 21, the outer plate 22, the top plate 23, the inner plate 24 and the two end plates 25 together form a cavity for accommodating the pressing airbag 3, and the pressing mold cavity 2 and the pressing airbag 3 are provided with inflation holes. In this embodiment, the inflation hole of the pressing mold cavity 2 is arranged on the outer plate 22 (see Figure 4), the bottom plate 21, the outer plate 22, the top plate 23, the inner plate 24 and the two end plates 25 can be integrally formed or welded, the inner plate 24 of the pressing mold cavity 2 is contoured, that is, the shape of the inner plate 24 is similar to the shape of the bonding place of the sole and upper, the inner plate 24 is provided with a through groove 26 for the force-applying part of the pressing airbag 3 to apply force to the bonding place of the sole and upper, the through groove 26 is arranged corresponding to the bonding place of the sole and upper, the force-applying part of the pressing airbag 3 is provided with an auxiliary force-applying component, the bottom support mechanism includes a support plate 11 and a plurality of floating support strips 12 arranged side by side on the support plate 11 along the front-rear direction.

[0043] The auxiliary force-applying component includes a pressure strip 51, which is installed on the force-applying part of the pressing airbag 3. The pressure strip 51 is arranged on the outer side of the through groove 26. By applying pressure to the bonding point of the sole and upper through the pressure strip 51, the pressure can be more concentratedly applied to the bonding point of the sole and upper, and the pressing force is more uniform.

[0044] The pressure strip 51 is in an elastic band-like structure, and the pressure strip 51 in the elastic band-like structure can be deformed as the shape of the shoe changes, so as to better fit the bonding point between the sole and the upper of the shoe and apply force more evenly.

[0045] The mold cavity power mechanism 4 includes a lateral cylinder 41 and a slide plate 42. The slide plate 42 is movably mounted on the support plate 11. The support plate 11 is provided with a slide groove. The bottom of the slide plate 42 is provided with a slider. The slider is slidably mounted in the slide groove, thereby providing a guiding effect on the movement of the slide plate 42. The pressing mold cavity 2 is mounted on the slide plate 42. The present embodiment does not limit the installation method of the pressing mold cavity 2, as long as it is an installation method that is convenient for disassembly. For example, the pressing mold cavity 2 of the present embodiment is mounted on the slide plate 42 by bolts (not shown in the figure). The piston rod end of the lateral cylinder 41 is connected to the slide plate 42. The lateral cylinder 41 and the slide plate 42 drive the two pressing mold cavities 2 to move closer to each other, so that a pressing space with a shape similar to the gluing place of the sole and upper is formed between the two pressing mold cavities 2, so that the pressure of the pressing airbag 3 is more concentrated on the gluing place of the sole and upper; after the pressing is completed, the lateral cylinder 41 and the slide plate 42 drive the two pressing mold cavities 2 to move away from each other, so as to facilitate the removal of the shoes.

[0046] The bottom of the floating support bar 12 is floatingly installed on the support plate 11 through the support spring 13. The floating support bar 12 is installed through the support spring 13. When the sole 6 is placed on the floating support bar 12, the floating support bar 12 can float up and down according to the shape of the sole 6. The support is provided by the support spring 13, so that the floating support bar 12 is more adapted to the shape of the sole 6 and provides good support for the sole 6.

[0047] Example 2

[0048] See also Figure 1 , 2 , 5 and 6, a sole and upper pressing device, which is different from Example 1 in that the auxiliary force-applying assembly of this embodiment includes multiple groups of connecting blocks 53 and pressing blocks 52, the connecting blocks 53 are installed on the force-applying part of the pressing airbag 3, the connecting blocks 53 pass through the through holes 27 and are connected to the pressing blocks 52, the shape of the connecting blocks 53 is adapted to the shape of the through holes 27, the connecting blocks 53 are made of nylon, and the pressing blocks 52 are made of elastic material.

[0049] The force-applying part of the pressed airbag 3 is connected to the pressing block 152 through the connecting block 153. The pressed airbag 3 expands to apply pressure to the bonding part of the sole and upper through multiple pressing blocks 152, so that the pressure can be applied more evenly to the bonding part of the sole and upper. The connecting block 153 passes through the through hole 27 and is connected to the pressing block 152. When the pressed airbag 3 expands and pushes the connecting block 153 to move, the through hole 27 can provide a guiding effect on the movement of the connecting block 153, limiting the shaking of the connecting block 153 during the movement, so that the pressing block 152 can be accurately pressed on the bonding part of the sole and upper, so that the pressing force of the pressing block 152 on the bonding part of the sole and upper is more concentrated. The pressing block 152 made of elastic material can be deformed as the shape of the shoe changes, better fit the bonding part of the sole and upper, and the force is more evenly applied. The connecting block 153 made of nylon has strength, and can better press the pressing block 152 on the bonding part of the sole and upper.

[0050] The rest is the same as Example 1 and will not be described in detail.

[0051] Example 3

[0052] See also Figure 7 A sole and upper pressing method, using the sole and upper pressing device of embodiment 1 or 2, specifically comprises the following steps:

[0053] Step 1: Place the glued sole 6 on the floating support strip 12, and then place the glued upper 7 with the shoe last 8 on the sole 6, and adjust and align the sole 6 and the upper 7;

[0054] Step 2: Start the lateral cylinders 41 on the left and right sides of the support plate 11, and the piston rods of the lateral cylinders 41 extend, respectively driving the slide plates 42 on the left and right sides of the support plate 11 to move toward each other, driving the pressing mold cavities 2 on the slide plates 42 to approach each other to form a pressing space, and placing the sole and upper in the pressing space;

[0055] Step 3, start the inflation of the pressed airbag 3, and the pressed airbag 3 expands;

[0056] Step 4: The expanded pressing airbag 3 is restricted by the bottom plate 21, the outer plate 22, the top plate 23, the inner plate 24 and the two end plates 25 of the pressing mold cavity 2, and the pressing airbag 3 is expanded and extruded outward from the through groove 26 or the pressing airbag 3 extrude the connecting block 1 53 from the through hole 27, thereby driving the pressure strip 51 or the pressure block 1 52 to apply pressure to the gluing part of the sole and upper, and maintaining the pressure for 10 seconds to 30 seconds;

[0057] Step 5: The pressing airbag 3 contracts, and the piston rod of the lateral cylinder 41 retracts, driving the two slide plates 42 to move away from each other, driving the pressing mold cavity 2 on the slide plate 42 to move away from each other, taking out the pressed shoes, and putting them into the subsequent heating equipment for further curing;

[0058] Step 6. Repeat steps 1 to 5 to press the next shoe.

[0059] In the step 4, the pressure of the pressed airbag 3 is 3 bar-6 bar.

[0060] In order to improve the uniformity and strength of the pressing force at the bonding point between the sole and the upper, the shoe last 8 in the upper 7 of this embodiment is specially designed. Figure 8-9 The shoe last 8 is provided with an airbag cavity 81, and an inner airbag 82 is provided in the airbag cavity 81. The shoe last 8 and the inner airbag 82 are provided with inflation holes (not shown in the figure). The side wall of the shoe last 8 is provided with a plurality of through holes 27 corresponding to the gluing position of the sole and upper. The force-applying part of the inner airbag 82 is connected with a plurality of connecting blocks 83. The connecting blocks 83 extend through the through holes 27 and extend out of the shoe last 8 to be connected with a pressing block 84. The pressing block 84 is made of nylon material.

[0061] In the above step three, when the pressing airbag 3 is started to inflate, the inner airbag 82 is also started to inflate at the same time. The inner airbag 82 inflates and expands, driving the second connecting block 83 to be squeezed out from the through hole 27, thereby driving the second pressing block 84 to apply pressure from the inner side of the upper 7 to the bonding point of the sole and upper, providing support force for the bonding point of the sole and upper during pressing.

[0062] The arrangement of the inner airbag 82, the second connecting block 83 and the second pressing block 84 makes the pressing force of the pressing airbag 3 on the sole and upper more concentrated and uniform, further improving the gluing effect of the sole and upper.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sole and upper pressing device, characterized in that: The invention comprises a bottom support mechanism, two pressing mold cavities (2) arranged on the bottom support mechanism in opposite relation, a pressing air bag (3) arranged in the pressing mold cavities (2), and two mold cavity power mechanisms (4) arranged on the bottom support mechanism in opposite relation; the pressing mold cavities (2) are movably arranged on the bottom support mechanism, the mold cavity power mechanism (4) drives the two pressing mold cavities (2) to move closer to or farther away from each other, and a pressing space having a shape similar to that of a bonding point between the sole and upper of a shoe is formed between the two pressing mold cavities (2) that are close to each other; the pressing mold cavity (2) comprises a bottom plate (21), an outer plate (22), a top plate (23), an inner plate (24), and a bottom plate (25). 4) and two end plates (25), the bottom plate (21), the outer plate (22), the top plate (23), the inner plate (24) and the two end plates (25) together form a cavity for accommodating the pressed airbag (3), the inner plate (24) of the pressed mold cavity (2) is of a contoured design, the inner plate (24) is provided with a plurality of through holes (27) for the force-applying portion of the pressed airbag (3) to apply force to the gluing portion of the sole and upper, an auxiliary force-applying component is provided at the force-applying portion of the pressed airbag (3), the bottom support mechanism comprises a support plate (11) and a plurality of floating support strips (12) arranged side by side on the support plate (11) in a front-to-rear direction, The auxiliary force-applying assembly comprises a plurality of groups of connecting blocks (53) and pressing blocks (52); the connecting blocks (53) are mounted on the force-applying portion of the pressed airbag (3); the connecting blocks (53) pass through the through holes (27) to be connected to the pressing blocks (52); the shape of the connecting blocks (53) matches the shape of the through holes (27); The connecting block 1 (53) is made of nylon, and the pressing block 1 (52) is made of elastic material; It also includes a shoe last (8) arranged in the upper (7), an airbag cavity (81) being arranged in the shoe last, an inner airbag (82) being arranged in the airbag cavity (81), inflation holes being arranged on the shoe last (8) and the inner airbag (82), a plurality of through holes being arranged on the side wall of the shoe last (8) corresponding to the gluing position of the sole and the upper, a plurality of connecting blocks (83) being connected to the force-applying part of the inner airbag (82), the connecting blocks (83) passing through the through holes and extending out of the shoe last (8) and being connected to the pressing blocks (84), the pressing blocks (84) being made of nylon material; The mold cavity power mechanism (4) comprises a lateral cylinder (41) and a slide plate (42), wherein the slide plate (42) is movably mounted on the support plate (11), the pressing mold cavity (2) is mounted on the slide plate (42), and the piston rod end of the lateral cylinder (41) is connected to the slide plate (42).

2. The sole and upper pressing device according to claim 1, characterized in that: The bottom of the floating support bar (12) is floatingly mounted on the support plate (11) via a support spring (13).

3. A method for pressing a sole and an upper, characterized in that: Use the sole and upper pressing device as described in claim 1 or 2.

4. The sole and upper lamination method according to claim 3, characterized in that: The specific steps include: Step 1: Place the glued sole (6) on the floating support strip (12), then place the glued upper (7) with the shoe last (8) on the sole (6), and adjust and align the sole (6) and the upper (7); Step 2: Start the lateral cylinders (41) on the left and right sides of the support plate (11), and the piston rods of the lateral cylinders (41) extend, respectively driving the slide plates (42) on the left and right sides of the support plate (11) to move toward each other, driving the pressing mold cavities (2) on the slide plates (42) to approach each other to form a pressing space, and placing the sole and upper of the shoe in the pressing space; Step 3, starting the compression airbag (3) to inflate, so that the compression airbag (3) expands; Step 4: The expanded pressing airbag (3) is restricted by the bottom plate (21), the outer plate (22), the top plate (23), the inner plate (24) and the two end plates (25) of the pressing mold cavity (2), and the pressing airbag (3) squeezes the connecting block 1 (53) out of the through hole (27), thereby driving the pressing block 1 (52) to apply pressure to the bonding part of the sole and the upper, and the pressure is maintained for 10 seconds to 30 seconds; Step 5: The pressing airbag (3) contracts, and the piston rod of the lateral cylinder (41) retracts, driving the two slide plates (42) to move away from each other, driving the pressing mold cavity (2) on the slide plate (42) to move away from each other, taking out the pressed shoes, and putting them into the subsequent heating equipment for further curing; Step 6. Repeat steps 1 to 5 to press the next shoe.

5. The sole and upper lamination method according to claim 4, characterized in that: In step 4, the pressure of the pressed airbag (3) is 3 bar to 6 bar.

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