Automobile airbag molding equipment

Abstract

The present invention provides a kind of automobile airbag molding equipment, which relates to the field of injection molding, including a base, a bracket, a hydraulic rod, a positioning seat, an upper mold assembly, a fastening mechanism, a support seat, a lower mold assembly and an oscillation assembly. The end face of the base is provided with a bracket and the top face of the bracket is provided with a hydraulic rod. The output end of the hydraulic rod is connected to the positioning seat. The bottom face of the positioning seat is connected to the upper mold assembly through evenly distributed support columns. The outer ring of the upper mold assembly is evenly distributed with fastening mechanisms. A support seat is provided inside the bracket and located on the upper side of the base. A lower mold assembly is provided on the support seat through an oscillation assembly and the lower mold assembly corresponds to the upper mold assembly. The molding equipment can ensure the convenience of mold opening while firmly closing the mold in the molding cavity, effectively saving costs and improving injection molding efficiency. At the same time, the molding equipment can realize the rapid and even filling of the molding cavity with molten material, ensuring the quality of injection molding products.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an automobile safety airbag molding device. Background Art

[0002] Airbags are very important safety devices in cars. When a car is involved in a collision, the gas generator inflates the airbag, causing it to pop out, thereby reducing the damage caused to the human body and effectively protecting the lives of the driver and passengers.

[0003] Parts used in the press-fitting preparation process of airbag products (such as airbag covers, airbag molding cylinders, etc.) are usually prepared by injection molding, such as Chinese patent document CN218366172U, an injection mold for an automobile airbag bracket, and Chinese patent document CN211941848U, an injection mold for new energy automobile airbags, etc. Injection molding is usually a method of injecting completely molten material into a molding cavity under high pressure at a certain temperature, and obtaining a molded part after cooling and solidification. It mainly includes six steps: mold closing, glue injection, pressure holding, cooling, mold opening, and unloading. However, in order to facilitate the extrusion molding of airbag products and avoid problems such as damage to airbag products during extrusion, the injection molded parts in the airbag system are usually set as discontinuous curved surfaces, that is, special-shaped curved surfaces (for example: in order to adapt to the airbag product, the bottom surface of the airbag cover is set as an arc-shaped curved surface; in order to ensure that the airbag product adapts to the space of the whole vehicle, the side wall of the airbag molding cylinder is set as a special-shaped curved surface; in order to ensure that the airbag cover can slide in the airbag molding cylinder and realize the extrusion molding of the airbag product, the outer wall of the airbag cover is set as a special-shaped curved surface). In order to adapt to the special-shaped curved surface structure of the injection molded parts, the molding cavity needs to be adaptively set as a discontinuous curved surface, that is, there are uneven places. The discontinuous uneven places of the existing injection molds during injection molding are easy to cause uneven filling of the molten material, which in turn leads to problems such as uneven thickness of the molded product, breakpoints or cross-sections, affecting the overall integrity and mechanical properties of the molded product and increasing the defective rate of the injection molded product. At the same time, since the molten material is injected into the molding cavity under high pressure during the injection molding process, the existing injection molds are prone to the problem that the molten material overflows the molding cavity due to excessive pressure, which not only causes waste of materials, but also the splash of high-temperature molten material can easily cause damage to personnel and equipment. The solidified high-temperature molten material is easy to seal the molding cavity, resulting in difficulty in mold opening and unloading, and the solidified molten material will also increase additional cleaning costs; therefore, in order to avoid the splash of high-temperature molten material, the prior art usually uses a fastening and clamping device to firmly clamp the molding cavity after mold closing, but the use of a fastening and clamping device not only adds additional clamping processes and equipment, increases time and production costs, and secondly, requires manual clamping after mold closing and unloading before mold opening, which increases labor productivity. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide an automobile airbag molding equipment, which can realize the stable clamping of the molding cavity film and facilitate the mold opening without manual participation, thereby effectively saving costs and improving the injection molding efficiency; at the same time, the molding equipment can realize the uniform filling of the molding cavity with molten material, avoiding injection defects such as uneven injection thickness, injection breakpoints or sections, and injection surface cracks caused by discontinuous curved surfaces of the molding cavity.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A vehicle airbag molding device comprises a base, a bracket, a hydraulic rod, a positioning seat, an upper mold assembly, a fastening mechanism, a support seat, a lower mold assembly and an oscillating assembly. A bracket with a gate structure is arranged on the end surface of the base and a hydraulic rod is arranged in the middle of the top surface of the bracket. The hydraulic rod penetrates the top surface of the bracket and its output end is connected to the positioning seat. The positioning seat is located on the lower side of the top surface of the bracket and between two legs of the bracket; the bottom surface of the positioning seat is connected to the upper mold assembly through a plurality of evenly distributed support columns, and a plurality of groups of fastening mechanisms are evenly distributed on the outer circle of the upper mold assembly and around its (i.e., upper mold assembly) central axis; a support seat is fixedly arranged on the inner side of the bottom ends of the two legs of the bracket and located on the upper side of the base, and a lower mold assembly is arranged on the support seat through the oscillating assembly and the lower mold assembly corresponds to the upper mold assembly.

[0007] Based on further optimization of the above scheme, the positioning seat is fixed with lifting ears corresponding to the two legs of the bracket, and the inner walls of the two legs of the bracket are provided with vertical sliding grooves corresponding to the lifting ears. The lifting ears are slidably connected in the corresponding vertical sliding grooves to ensure stable lifting and lowering between the positioning seat and the entire upper mold assembly and the fastening mechanism.

[0008] Based on further optimization of the above scheme, the upper mold assembly includes an upper mold base, a cavity punch, a sealing ring and a first spring. A coaxial rotating disk is rotatably connected to the end face of the upper mold base, and the outer ring of the end face of the rotating disk is fixedly connected to the end of the support column away from the positioning seat. The cavity punch is arranged in the middle of the bottom surface of the upper mold base; a coaxial annular groove is provided on the bottom surface of the upper mold base and on the outer ring of the cavity punch. A sealing ring is slidably arranged in the annular groove and the top surface of the sealing ring is connected to the top of the annular groove through a first spring. There are multiple first springs and they are evenly distributed around the central axis of the annular groove.

[0009] Based on further optimization of the above solution, coaxial annular ridges are fixedly provided on the bottom surfaces of the upper die seat on both sides of the annular groove (ie, the bottom surfaces of the upper die seat on the inner and outer rings of the annular groove).

[0010] Based on the further optimization of the above scheme, the fastening mechanism includes a convex slider, a spring claw and a second spring. The convex slider is slidably arranged on the outer ring of the upper mold base and a vertical cavity is opened in the middle of its bottom surface. The inner wall of the bottom of the vertical cavity and multiple spring grooves are evenly opened around the central axis (i.e., the vertical cavity). The spring claw is slidably arranged in the spring groove and the bottom surface of the end where the spring claws are close to each other is set as an inclined structure; the end where the spring claws are far away from each other is connected to the corresponding bottom of the spring groove through the second spring.

[0011] Based on the further optimization of the above scheme, the convex slider is controlled by a lifting assembly to slide on the outer wall of the upper mold base. The lifting assembly includes a lifting plate, an annular gear ring and multiple sets of screw mechanisms. The lifting plate is arranged between the positioning seat and the upper mold base and the lifting plate is penetrated by the corresponding support column. The lifting plate is slidably connected with the support column; a coaxial annular groove is provided on the outer ring of the bottom surface of the lifting plate and corresponds to the convex slider, and the top surface of the convex slider is slidably engaged in the annular groove; the annular gear ring is rotatably arranged on the end face of the positioning seat and the annular gear ring is coaxially arranged with the positioning seat, and the inner diameter of the annular gear ring is larger than the maximum diameter of the hydraulic rod The large outer diameter can avoid interference between the annular gear ring and the hydraulic rod; the screw mechanism is evenly distributed around the central axis of the annular gear ring and is arranged on the inner ring of multiple support columns, including an adjusting screw, a first gear and a limit block. The bottom end of the adjusting screw passes through the positioning seat and the lifting plate from top to bottom in sequence, and is rotatably connected to the end face of the rotating disk. The adjusting screw is rotatably connected to the positioning seat and is threadedly connected to the lifting plate; the outer wall of the adjusting screw located on the upper side of the positioning seat is fixedly sleeved with the first gear and the first gear is respectively meshed with the outer wall of the annular gear ring, and a limit block is fixedly set on the end of the adjusting screw located on the upper side of the first gear.

[0012] Based on the further optimization of the above scheme, the lower mold assembly includes a lower mold base, a ring base and a clamping mechanism. The lower mold base is arranged on the upper side of the support base and a cavity groove is provided in the middle part of its end face corresponding to the cavity punch. The injection molding mold cavity is formed by the cooperation of the cavity punch and the cavity groove; a coaxial ring base is fixedly arranged on the outer ring of the lower mold base and a clamping mechanism is evenly arranged on the end face of the ring base corresponding to the fastening mechanism. The clamping mechanism includes a fixed column, a positioning head and a sliding head. The bottom end of the fixed column is fixedly connected to the end face of the ring base and the end portion of the fixed column away from the ring base corresponds to the vertical cavity. The positioning head is fixedly arranged on the lower outer wall of the positioning head and the coaxial sliding head is slidably sleeved. The positioning head is a conical structure with a small upper diameter and a large lower diameter. The sliding head is a conical structure with a large upper diameter and a small lower diameter. The maximum outer diameter of the positioning head and the sliding head is not greater than the inner diameter of the vertical cavity.

[0013] Based on the further optimization of the above scheme, the oscillation component includes a telescopic vibration mechanism, an incomplete gear, an annular turntable and multiple sets of sliding mechanisms; the telescopic vibration mechanism includes a telescopic sleeve, a telescopic rod and a third spring, the bottom end of the telescopic sleeve is rotatably connected to the end face of the base and the telescopic sleeve is coaxially arranged with the lower mold base, the telescopic sleeve passes through the support base and is rotatably connected, a sliding groove is provided in the middle of the top surface of the telescopic sleeve and the telescopic rod is slidably arranged in the sliding groove, the top end of the telescopic rod is connected to the bottom surface of the lower mold base and the bottom end of the telescopic rod is connected to the bottom surface of the sliding groove through the third spring; the telescopic sleeve is located on the outer wall of the lower side of the support base and is fixedly sleeved with an incomplete gear, the annular turntable is rotatably arranged between the support base and the base corresponding to the incomplete gear, and the annular turntable is coaxially arranged with the telescopic sleeve, the inner diameter of the annular turntable is not less than twice the maximum outer diameter of the incomplete gear and an inner gear ring is fixedly arranged on the inner wall of the annular turntable; a second rotatable gear is arranged between the incomplete gear and the inner gear ring and the second gear can be engaged with the gear of the incomplete gear The cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of springs, and the cam is provided with a plurality of

[0014] Based on further optimization of the above solution, the length of the tooth segment of the incomplete gear is not greater than one quarter of the circumference of the outer ring of the incomplete gear (ie the incomplete gear).

[0015] The following are the technical effects that the present invention has:

[0016] The present application cooperates with the upper mold assembly, the fastening mechanism and the lower mold assembly. During the process of the upper mold assembly following the downward movement of the positioning seat, not only can a molding cavity for injection molding be formed by the cooperation between the mold cavity punch and the mold cavity groove, but the molding cavity can also be effectively sealed to avoid the splashing of molten material due to high pressure or rotation of the molding cavity during the injection molding process, thereby ensuring the safety of the injection molding process and avoiding problems such as difficulty in opening the mold or cleaning due to overflow of molten material after injection molding. At the same time, the sealing clamping mechanism formed by the cooperation of the fastening mechanism and the lower mold assembly can not only effectively seal the molding cavity during the injection molding process, but also quickly open the mold after injection molding, thereby ensuring the smoothness of the entire injection molding process and avoiding unnecessary damage caused by manual participation as well as increased injection molding costs and time consumption. In addition, the present application uses an oscillation assembly composed of a telescopic vibration mechanism, an incomplete gear, a ring turntable and multiple sets of sliding mechanisms to perform a composite movement of self-rotation (i.e., rotation around its own central axis) and up and down vibration of the molding cavity after the film is closed, so that the injected molten material can quickly and evenly fill all parts of the molding cavity, avoiding problems such as breakpoints, cross-sections and uneven thickness caused by the failure to completely fill the molten material on the discontinuous curved surface of the molding cavity, thereby effectively ensuring the quality of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the molding equipment in an embodiment of the present invention.

[0018] Figure 2 for Figure 1 AA section view.

[0019] Figure 3 for Figure 1 BB section view.

[0020] Figure 4 for Figure 1 CC section view.

[0021] Figure 5 2 is a diagram showing the use status of the molding equipment in an embodiment of the present invention.

[0022] Figure 6 for Figure 5 A partial enlarged view of D in the middle.

[0023] Figure 7 for Figure 5 A partial enlarged view of E.

[0024] Among them, 10, base; 20, bracket; 30, hydraulic rod; 40, positioning seat; 41, lifting ear; 51, upper die seat; 511, support column; 512, rotating disk; 513, annular convex ridge; 52, cavity punch; 53, sealing ring; 54, first spring; 61, convex slider; 610, vertical cavity; 611, lifting plate; 612, annular gear ring; 6131, adjusting screw; 6132, first gear; 6133, limit block; 62, spring claw; 63, The second spring; 70, the support seat; 81, the lower die seat; 811, the cavity groove; 812, the rotating ring; 82, the sleeve ring seat; 831, the fixed column; 832, the positioning head; 833, the sliding head; 911, the telescopic sleeve; 912, the telescopic rod; 913, the third spring; 92, the incomplete gear; 920, the second gear; 93, the annular turntable; 930, the arc-shaped slide groove; 941, the sliding seat; 942, the sliding rod; 943, the limit seat; 944, the fourth spring; 945, the connecting rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment 1:

[0027] An automobile airbag molding device includes a base 10, a bracket 20, a hydraulic rod 30, a positioning seat 40, an upper mold assembly, a fastening mechanism, a support seat 70, a lower mold assembly and an oscillating assembly. The end surface of the base 10 is provided with a door-shaped bracket 20 and the middle of the top surface of the bracket 20 is provided with a hydraulic rod 30 (see Figure 1 As shown; it should be noted that: the base 10, the bracket 20 and the hydraulic rod 30 all adopt conventional structures and materials in the field, and are only used to realize the functions of positioning, supporting, connecting and driving the lifting of the various components and mechanisms of this application. They are not the invention points of this embodiment and can be replaced by other parts with equivalent functions. The hydraulic rod 30 passes through the top surface of the bracket 20 and its output end is connected to the positioning seat 40. The positioning seat 40 is located on the lower side of the top surface of the bracket 20 and between the two legs of the bracket 20 (such as Figure 1 As shown, the positioning seat 40 is arranged parallel to the base 10); the positioning seat 40 corresponds to the two legs of the bracket 20 (i.e. Figure 1 The left and right sides (as shown) are respectively fixed with lifting ears 41, and the inner walls of the two legs of the bracket 20 respectively open vertical sliding grooves corresponding to the lifting ears 41. The lifting ears 41 are slidably connected in the corresponding vertical sliding grooves to ensure stable lifting between the positioning seat 40 and the entire upper mold assembly and the fastening mechanism.

[0028] The bottom surface of the positioning seat 40 is connected to the upper mold assembly through a plurality of evenly distributed support columns 511 (the number of support columns 511 is generally not less than five, and is set according to actual conditions. In this embodiment, it is set to six). The upper mold assembly includes an upper mold seat 51, a cavity punch 52, a sealing ring 53 and a first spring 54. A coaxial rotating disk 512 is rotatably engaged in the end surface of the upper mold seat 51 (that is, the rotating disk 512 is coaxially arranged with the upper mold seat 51 and is rotatably engaged in the middle of the end surface of the upper mold seat 51), and the outer ring of the end surface of the rotating disk 512 is fixedly connected to one end of the support column 511 away from the positioning seat 40 (the connection between the positioning seat 40 and the upper mold seat 51 is realized by the support column 511 and the rotating disk 512), and a cavity punch 52 is arranged in the middle of the bottom surface of the upper mold seat 51 (the cavity punch 52 is set in a corresponding shape according to the shape of the part to be injection molded; at the same time, In order to expand the use scope of the entire device, the cavity punch 52 and the upper die seat 51 are detachably connected; a coaxial annular groove is provided on the bottom surface of the upper die seat 51 and located on the outer ring of the cavity punch 52 (that is, the annular groove is coaxial with the upper die seat 51), and a sealing ring 53 is slidably arranged in the annular groove (that is, the inner ring wall and the outer ring wall of the sealing ring 53 are respectively slidably connected to the inner walls on both sides of the annular groove) and the top surface of the sealing ring 53 is connected to the top of the annular groove through a first spring 54, and there are multiple first springs 54 and they are evenly distributed around the central axis of the annular groove (the number of first springs 54 is set according to actual conditions, generally not less than ten, and ten first springs 54 are used in this embodiment); at the same time, in order to prevent the sealing ring 53 from being squeezed multiple times to cause damage or indentation to the lower die seat 81, a layer of high-temperature resistant rubber layer is evenly provided on the bottom surface of the sealing ring 53 to further ensure the sealing of the molding cavity. The upper die seat 51 is located on the bottom surfaces on both sides of the annular groove (that is, the bottom surfaces of the upper die seat 51 on the inner and outer rings of the annular groove, Figure 7 On the left and right sides of the annular groove shown in the figure, coaxial annular ridges 513 are respectively fixed (that is, there are two annular ridges 513 and they are both colinear with the central axis of the annular groove, and the heights of the two annular ridges 513 are the same). In addition, in the initial state, refer to Figure 1 As shown, the bottom surface of the sealing ring 53 is located at the lower side of the bottom surface of the annular convex ridge 513 .

[0029] The outer ring of the upper mold assembly (mainly the outer ring of the upper mold base 51, such as Figure 1 As shown in the figure, a plurality of fastening mechanisms are evenly distributed around the central axis of the upper mold assembly (the number of fastening mechanisms is generally 5 to 10, which are set according to actual conditions. In this embodiment, 6 fastening mechanisms are used); the fastening mechanisms include a convex slider 61, a spring claw 62 and a second spring 63. The convex slider 61 is slidably arranged on the outer ring of the upper mold base 51 and a vertical cavity 610 is provided in the middle of its bottom surface (as shown in the figure). Figure 6As shown, the vertical cavity 610 is opened upward from the bottom surface of the convex slider 61 and the vertical cavity 610 does not penetrate the convex slider 61), and a plurality of spring grooves are evenly opened on the inner wall of the bottom inner wall of the vertical cavity 610 and around its (i.e., the vertical cavity 610) central axis (the number of spring grooves is generally 4 to 8, which are set according to actual conditions. In this embodiment, 5 spring grooves are opened in the same vertical cavity 610, and the corresponding spring claws 62 and second springs 63 are both 5 groups), and the spring claws 62 are slidably arranged in the spring grooves, and the bottom surface of one end of the spring claws 62 close to each other is set to an inclined structure (see Figure 6 As shown, the inclined structures of the spring claws 62 on the left and right sides are inclined from the middle of the vertical cavity 610 to the outer circle); the ends of the spring claws 62 that are away from each other are connected to the bottom of the corresponding spring groove through the second spring 63 (as shown in FIG. Figure 6 At the same time, the convex slider 61 is controlled by the lifting assembly to slide on the outer wall of the upper die base 51, combined with Figure 1 and Figure 2 As shown, the lifting assembly includes a lifting plate 611, an annular gear ring 612 and multiple sets of screw mechanisms. The lifting plate 611 is arranged between the positioning seat 40 and the upper mold seat 51 and the lifting plate 611 is penetrated by the corresponding support column 511. The lifting plate 611 is slidably connected with the support column 511 (thereby realizing the hard limit of the rotation of the lifting plate 611); the outer ring of the bottom surface of the lifting plate 611 and the corresponding convex slider 61 are provided with a coaxial annular slide groove (that is, the annular slide groove and the central axis of the lifting plate 611 are colinear), and the top surface of the convex slider 61 is slidably engaged in the annular slide groove (one is to realize the connection between the convex slider 61 and the lifting plate 611, and the other is to ensure that the convex slider 61 can rotate relative to the lifting plate 611); the annular gear ring 612 is rotatably arranged on the end surface of the positioning seat 40 and the annular gear ring 612 is coaxially arranged with the positioning seat 40 (such as Figure 2 As shown, the inner diameter of the annular gear ring 612 is larger than the maximum outer diameter of the hydraulic rod 30 (as shown in FIG. Figure 2 As shown, there is a gap between the inner wall of the annular gear ring 612 and the outer wall of the hydraulic rod 30) to avoid interference between the annular gear ring 612 and the hydraulic rod 30; the screw mechanisms are evenly distributed around the central axis of the annular gear ring 612 and are arranged on the inner rings of the plurality of support columns 511 (the number of screw mechanisms is generally not less than three groups, see Figure 2 As shown, in this embodiment, 4 sets of screw mechanisms are provided, including an adjusting screw 6131, a first gear 6132 and a limit block 6133. The bottom end of the adjusting screw 6131 sequentially penetrates the positioning seat 40 and the lifting plate 611 from top to bottom, and is rotatably connected to the end surface of the rotating disk 512. The adjusting screw 6131 is rotatably connected to the positioning seat 40 and is threadedly connected to the lifting plate 611 (so that the lifting plate 611 is controlled and positioned by the adjusting screw 6131); the outer wall of the adjusting screw 6131 located on the upper side of the positioning seat 40 is fixedly sleeved with the first gear 6132, and the first gear 6132 is respectively meshed with the outer wall of the annular gear ring 612 (as shown in FIG. 2 ). Figure 2 As shown in the figure), a limit block 6133 is fixedly provided at the end of the adjusting screw 6131 located on the upper side of the first gear 6132.

[0030] A support base 70 (such as Figure 1 As shown, the support seat 70 is arranged parallel to the base 10), and a lower mold assembly is arranged on the support seat 70 through an oscillating assembly and the lower mold assembly corresponds to the upper mold assembly.

[0031] Specifically:

[0032] The lower mold assembly includes a lower mold base 81, a collar base 82 and a clamping mechanism. The lower mold base 81 is arranged on the upper side of the support base 70 and a cavity groove 811 is provided in the middle of its end surface corresponding to the cavity punch 52. The cavity punch 52 and the cavity groove 811 cooperate to form an injection molding cavity (such as Figure 1 The outer ring of the lower die seat 81 is fixedly provided with a coaxial ring seat 82 (see Figure 1 As shown, the central axis of the collar seat 82 and the lower die seat 81 are collinear and the end surface of the collar seat 82 is flush with the end surface of the lower die seat 81) and the end surface of the collar seat 82 is evenly provided with a clamping mechanism corresponding to the fastening mechanism (in this embodiment, there are 6 sets of fastening mechanisms, so there are also 6 sets of corresponding clamping mechanisms), refer to Figure 6 As shown: the clamping mechanism includes a fixed column 831, a positioning head 832 and a sliding head 833. The bottom end of the fixed column 831 is fixedly connected to the end surface of the collar seat 82, and the end of the fixed column 831 away from the collar seat 82 is fixedly provided with the positioning head 832 corresponding to the vertical cavity 610. The fixed column 831 is located on the lower side outer wall of the positioning head 832 and is slidably sleeved with the coaxial sliding head 833. The positioning head 832 is a conical structure with a small upper diameter and a large lower diameter (such as Figure 6 As shown in FIG. 1 ), the sliding head 833 is a conical structure with a large upper diameter and a small lower diameter (as shown in FIG. Figure 6 As shown), and the maximum outer diameter of the positioning head 832 and the sliding head 833 is not greater than the inner diameter of the vertical cavity 610 (generally, the maximum outer diameter of the positioning head 832 and the sliding head 833 is about 0.4 to 1.0 mm smaller than the inner diameter of the vertical cavity 610, which is convenient for the positioning head 832 and the sliding head 833 to smoothly cooperate with the vertical cavity 610 and slide in the vertical cavity 610, and avoids a large offset between the upper mold base 51 and the lower mold base 81, which affects the accuracy of the molding cavity); in addition, as Figure 6 As shown, the inner wall of the sliding head 833 is evenly provided with first sliding protrusions, and the outer wall of the fixed column 831 is correspondingly provided with a vertical first sliding groove, and the first sliding protrusion is clamped in the corresponding first sliding groove, which not only realizes the hard limit of the upward and downward sliding of the sliding head 833, but also avoids relative rotation between the sliding head 833 and the fixed column 831.

[0033] The oscillation assembly includes a telescopic vibration mechanism, an incomplete gear 92, an annular turntable 93 and multiple sets of sliding mechanisms; the telescopic vibration mechanism includes a telescopic sleeve 911, a telescopic rod 912 and a third spring 913, the bottom end of the telescopic sleeve 911 is rotatably connected to the end surface of the base 10 and the telescopic sleeve 911 is coaxially arranged with the lower mold base 81, the telescopic sleeve 911 passes through the support base 70 and is rotatably connected (between the outer wall of the telescopic sleeve 911 and the support base 70), a sliding groove is provided in the middle of the top surface of the telescopic sleeve 911 and the telescopic rod 912 is slidably arranged in the sliding groove (in order to avoid the telescopic rod 912 and the lower mold base 81). The telescopic sleeve 911 rotates relative to each other, the outer wall of the telescopic rod 912 is evenly provided with second sliding protrusions, and the inner wall of the telescopic sleeve 911 is correspondingly provided with a vertical second sliding groove, and the second sliding protrusion is slidably engaged in the corresponding second sliding groove, so as to realize the simultaneous and same-direction rotation of the telescopic sleeve 911 and the telescopic rod 912 and the up and down sliding of the telescopic rod 912 relative to the telescopic sleeve 911), the top end of the telescopic rod 912 is connected to the bottom surface of the lower mold base 81 (which can be set as a detachable connection) and the bottom end of the telescopic rod 912 is connected to the bottom surface of the sliding groove through the third spring 913 (such as Figure 1 As shown); the telescopic sleeve 911 is located on the outer wall of the lower side of the support seat 70 and is fixedly sleeved with the incomplete gear 92, and the annular turntable 93 is rotatably arranged between the support seat 70 and the base 10 corresponding to the incomplete gear 92 (the annular turntable 93 can be connected to the bottom surface of the support seat 70 through a hanging bracket, or can be connected to the end surface of the base 10 through a support block, and the specific connection method can be adopted according to the specific situation), and the annular turntable 93 is coaxially arranged with the telescopic sleeve 911 (combined with Figure 1 and Figure 4 As shown in FIG. 1 ), the inner diameter of the annular rotating disk 93 is not less than twice the maximum outer diameter of the incomplete gear 92 (as shown in FIG. Figure 4 The inner wall of the annular rotating disk 93 is fixedly provided with an inner gear ring; a second gear 920 (as shown in FIG. 1 ) is provided between the incomplete gear 92 and the inner gear ring to rotate. Figure 4 As shown, the number of second gears 920 is generally 1, 2 or 3, and in this embodiment, there are 2; at the same time, the second gear 920 is fixedly sleeved on the outer wall of the gear rod, and the gear rod is rotatably set on the bottom surface of the support seat 70, so as to realize the setting of the second gear 920) and the second gear 920 can mesh with the tooth segment of the incomplete gear 92 and the inner gear ring; the tooth segment length of the incomplete gear 92 is not greater than one-fourth of the circumference of its (i.e., the incomplete gear 92) outer ring (set according to the number of second gears 920 and sliding mechanisms). The support seat 70 is located on the outer ring of the inner gear ring and has a plurality of horizontal slide grooves evenly arranged around its own central axis, and a sliding mechanism is set in the horizontal slide groove (i.e., the number of horizontal slide grooves corresponds to the number of sliding mechanisms, and the number of sliding mechanisms is 5 to 8 groups, combined with Figure 1 and Figure 3As shown, this embodiment adopts 6 sets of sliding mechanisms), the sliding mechanism includes a sliding seat 941, a sliding rod 942, a limiting seat 943, a fourth spring 944 and a connecting rod 945, the sliding seat 941 is arranged corresponding to the horizontal sliding groove and the bottom surface of the sliding seat 941 is slidably connected to the end surface of the support seat 70 (such as Figure 3 As shown in the figure, a slide rod 942 is fixedly arranged at the middle of the bottom surface of the sliding seat 941 corresponding to the horizontal slide groove, and an arcuate slide groove 930 is provided at the annular turntable 93 corresponding to the horizontal slide groove. After the end of the slide rod 942 away from the sliding seat 941 passes through the horizontal slide groove and the arcuate slide groove 930 from top to bottom in sequence, a limit seat 943 is fixedly arranged at the end located at the lower side of the annular turntable 93. The outer wall of the slide rod 942 is respectively slidably connected with the inner wall of the horizontal slide groove and the arcuate slide groove 930. The side wall of the slide rod 942 close to the telescopic sleeve 911 is connected to the side wall of the horizontal slide groove through a fourth spring 944 (combined with Figure 1 and Figure 3 As shown in the figure, the outer ring of the bottom surface of the lower die seat 81 is rotatably connected to a coaxial rotating ring 812 (that is, the rotating ring 812 is coaxial with the lower die seat 81 and the rotating ring 812 is rotatably arranged on the bottom surface of the lower die seat 81), the top surface of the sliding seat 941 and the bottom surface of the corresponding area of ​​the rotating ring 812 are connected through a connecting rod 945, and the two ends of the connecting rod 945 are rotatably connected to the top surface of the sliding seat 941 and the bottom surface of the rotating ring 812 through a bearing seat (as shown in the figure). Figure 1 as shown).

[0034] Embodiment 2:

[0035] As another preferred embodiment of the scheme of the present invention, on the basis of the molding equipment described in Example 1, in order to facilitate the feeding of molten material and the discharge of gas during the injection molding process and avoid defects such as bubbles and pores, a coaxial feed pipe is arranged in the middle of the upper mold base 51 and the feed pipe passes through the rotating disk 512, the upper mold base 51 and the cavity punch 52 from top to bottom in sequence, and the top end of the feed pipe is located between the upper mold base 51 and the lifting plate 611, and the feeding is realized by connecting with the feed pipe through an external pipeline; exhaust pipes are evenly distributed on the outer circle of the feed pipe (generally two and distributed on both sides of the feed pipe) and the exhaust pipe passes through the rotating disk 512, the upper mold base 51 and the cavity punch 52 from top to bottom in sequence, and the top end of the exhaust pipe is located between the upper mold base 51 and the lifting plate 611 and a one-way valve is arranged on the exhaust pipe.

[0036] At the same time, in order to facilitate unloading and avoid the inconvenience of cleaning after the molten material in the pipeline solidifies, the longitudinal cross-section of the exhaust pipe and the feed pipe is set to a conical structure with a large diameter at the top and a small diameter at the bottom. During the unloading process, the solidified material in the pipeline is unloaded together with the molded parts, and the excess part can be removed through machining later.

[0037] Embodiment 3:

[0038] As another preferred embodiment of the scheme of the present invention, on the basis of the molding equipment described in Example 1, in order to avoid impact cracks, pits or aging of the equipment during repeated shock and impact, the telescopic sleeve 911 is located on the top surface of the outer ring of the telescopic rod 912, and the horizontal slide groove is located on the side wall away from the fourth spring 944, and a rubber layer is evenly arranged, thereby forming a damping absorption for the impact.

[0039] Embodiment 4:

[0040] A product molding method in an airbag system, using any one of the molding devices in Embodiments 1 to 3, comprising:

[0041] Step 1: Initialize the device: First, initialize the entire device. Figure 1 As shown; after initialization, a cleaning tool is used to clean the outer wall of the cavity punch 52 and the inner wall of the cavity groove 811 to prevent impurities from adhering.

[0042] Step 2, closing the film: start the hydraulic rod 30 to extend and push the positioning seat 40 downward, and the positioning seat 40 drives the upper mold assembly, the fastening mechanism and the lifting assembly to move downward at the same time: during the downward movement of the upper mold assembly, the cavity punch 52 cooperates with the cavity groove 811 to gradually form an injection molding cavity, and at the same time, the bottom surface of the sealing ring 53 contacts the end surface of the lower mold seat 81 located at the outer ring of the cavity groove 811, and gradually lifts the sealing ring 53 to move upward relative to the annular groove, and the first spring 54 is compressed, and then the sealing ring 53 is closed to the outer periphery of the molding cavity through the reverse force of the elastic force of the first spring 54; the fastening mechanism moves downward During the process, the clamping mechanism on the end face of the collar seat 82 cooperates with the corresponding fastening mechanism, that is, the positioning head 832 is inserted into the corresponding vertical cavity 610, and gradually pushes the spring claw 62 to slide away from each other, and the second spring 63 is compressed. When the positioning head 832 moves to the upper side of the corresponding spring claw 62 (at this time, the bottom surface of the annular convex ridge 513 contacts the end face of the lower die seat 81, and the cavity punch 52 and the cavity groove 811 form a complete molding cavity), the spring claw 62 moves to the side close to each other due to the elastic force of the second spring 63, thereby realizing the locking between the upper die seat 51 and the lower die seat 81. For details, see Figure 5 As shown; at this time, the hydraulic rod 30 stops extending.

[0043] Step 3, product molding: Fill the molding cavity with molten material. During the filling process, the telescopic sleeve 911 is synchronously started to rotate (the rotation of the telescopic sleeve 911 can be realized by the motor gear mechanism arranged on the end surface of the support seat 70). The telescopic sleeve 911 drives the telescopic rod 912 and the incomplete gear 92 to rotate at the same time. The telescopic rod 912 drives the entire molding cavity to rotate through the lower mold seat 81, so as to use the centrifugal force to quickly disperse the filled molten material; when the tooth segment of the incomplete gear 92 is engaged with the second gear 920, the incomplete gear 92 drives the annular turntable 93 to rotate through the second gear 920, thereby driving the sliding seat 941 to slide to the side close to each other (i.e., the side close to the telescopic sleeve 911) through the sliding rod 942, and the sliding seat 94 The lower die base 81 and the molding cavity are pushed upward by the connecting rod 945 for a short distance as a whole, and the telescopic rod 912 moves upward relative to the telescopic sleeve 911; when the smooth section of the incomplete gear 92 corresponds to the second gear 920, due to the force of the third spring 913 and the fourth spring 944, the lower die base 81 and the molding cavity move downward as a whole, and the sliding seat 941, the sliding rod 942, the limiting seat 943, the connecting rod 945 and the annular turntable 93 are reset until the tooth section of the incomplete gear 92 is meshed with the second gear 920 again, thereby realizing repeated up and down vibration of the molding cavity, so that the molten material quickly fills the discontinuous curved surface and avoids the occurrence of breakpoints or sections; until the molten plastic completely fills the molding cavity, the material is stopped from being filled, and the pressure holding and cooling process are performed.

[0044] Step 4, mold opening: After cooling and molding, stop the rotation of the telescopic sleeve 911 and reset the oscillation assembly; then, start the annular gear ring 612 to rotate (the annular gear ring 612 can be driven to rotate by a motor and a gear structure arranged on the end face of the positioning seat 40 and located on the inner ring of the annular gear ring 612, and a coaxial inner gear ring is arranged on the inner ring of the annular gear ring 612), and the annular gear ring 612 drives the adjusting screw 6131 to rotate through the first gear 6132, thereby realizing the downward movement of the lifting plate 611, and the lifting plate 611 pushes the convex slider 61 to move downward on the outer wall of the upper mold seat 51, so that the spring claw 62 gradually moves to the sliding head 833 on the lower side of the corresponding positioning head 832, and is supported by the sliding head 833 and slides to the side away from each other. When the spring claw 62 moves to the lower side of the sliding head 833, the spring claw 62 moves to the side close to each other due to the elastic force of the second spring 63 , and then support the sliding head 833; at this time, the annular gear ring 612 is reversed, and the convex slider 61 is driven to move up through the first gear 6132, the adjusting screw 6131 and the lifting plate 611, and then the spring claw 62 is used to pull the sliding head 833 to move up on the surface of the fixed column 831 along the axial direction of the fixed column 831. When the end face of the sliding head 833 contacts the bottom surface of the positioning head 832, the sliding head 833 is supported and cannot move up. With the continuous driving of the lifting plate 611, the spring claw 62 moves along the inclined surface of the sliding head 833 to the side away from each other, and then the locking between the sliding head 833 and the positioning head 832, the upper mold base 51 and the lower mold base 81 is released in turn (at this time, the sliding head 833 is reset due to gravity), and then the entire upper mold assembly is started to move up through the hydraulic rod 30 to realize mold opening; after mold opening, the molded product is unloaded and the equipment is reset.

[0045] Step 5: Post-processing: Machining the unloaded molded products to remove excess material and trim to avoid burrs and other effects.

Claims

1. An automobile airbag molding device, characterized in that: The invention comprises a base (10), a bracket (20), a hydraulic rod (30), a positioning seat (40), an upper mold assembly, a fastening mechanism, a support seat (70), a lower mold assembly and an oscillating assembly. The end surface of the base (10) is provided with a bracket (20) of a gate-shaped structure and the middle part of the top surface of the bracket (20) is provided with a hydraulic rod (30). The hydraulic rod (30) penetrates the top surface of the bracket (20) and its output end is connected to the positioning seat (40). The positioning seat (40) is located at the lower side of the top surface of the bracket (20) and between two legs of the bracket (20). The bottom surface of the positioning seat (40) is connected to the upper mold assembly through a plurality of evenly distributed support columns (511). A plurality of fastening mechanisms are evenly distributed on the outer ring of the upper mold assembly and around its central axis. A support seat (70) is fixedly provided on the inner side of the bottom ends of the two legs of the bracket (20) and located on the upper side of the base (10). A lower mold assembly is provided on the support seat (70) through the oscillating assembly and the lower mold assembly corresponds to the upper mold assembly. The upper mold assembly comprises an upper mold base (51), a cavity punch (52), a sealing ring (53) and a first spring (54); a coaxial rotating disk (512) is rotatably engaged in the end surface of the upper mold base (51), and the outer ring of the end surface of the rotating disk (512) is fixedly connected to an end of the support column (511) away from the positioning base (40); a cavity punch (52) is arranged in the middle of the bottom surface of the upper mold base (51); a coaxial annular groove is provided on the bottom surface of the upper mold base (51) and located on the outer ring of the cavity punch (52); a sealing ring (53) is slidably arranged in the annular groove, and the top surface of the sealing ring (53) is connected to the top of the annular groove via a first spring (54); there are multiple first springs (54) and they are evenly distributed around the center axis of the annular groove; The bottom surfaces of the upper die seat (51) located on both sides of the annular groove are respectively fixedly provided with coaxial annular ridges (513); the fastening mechanism comprises a convex slider (61), a spring clamping claw (62) and a second spring (63); the convex slider (61) is slidably arranged on the outer ring of the upper die seat (51) and a vertical cavity (610) is provided in the middle of its bottom surface; a plurality of spring grooves are evenly provided on the inner wall of the bottom of the vertical cavity (610) and around its central axis; a spring clamping claw (62) is slidably arranged in the spring groove and the bottom surface of one end of the spring clamping claw (62) close to each other is provided with an inclined surface structure; the spring clamping claw ( 62) are connected to the bottom of the corresponding spring groove through a second spring (63); the convex slider (61) is controlled by a lifting assembly to slide on the outer wall of the upper die seat (51), and the lifting assembly includes a lifting plate (611), an annular gear ring (612) and a plurality of screw mechanisms. The lifting plate (611) is arranged between the positioning seat (40) and the upper die seat (51) and the lifting plate (611) is penetrated by the corresponding support column (511), and the lifting plate (611) is slidably connected to the support column (511); the outer ring of the bottom surface of the lifting plate (611) and the corresponding convex slider (6 1) a coaxial annular slide groove is provided, and the top surface of the convex slider (61) is slidably engaged in the annular slide groove; an annular gear ring (612) is rotatably arranged on the end surface of the positioning seat (40) and the annular gear ring (612) and the positioning seat (40) are coaxially arranged, and the inner diameter of the annular gear ring (612) is greater than the maximum outer diameter of the hydraulic rod (30); a screw mechanism is evenly distributed around the central axis of the annular gear ring (612) and is arranged on the inner ring of a plurality of support columns (511), including an adjusting screw (6131), a first gear (6132) and a limit block (6133), and the adjusting screw (6131 ) the bottom end of which passes through the positioning seat (40) and the lifting plate (611) from top to bottom in sequence and is rotatably connected to the end surface of the rotating disk (512); the adjusting screw (6131) is rotatably connected to the positioning seat (40) and is threadedly connected to the lifting plate (611); the outer wall of the adjusting screw (6131) located on the upper side of the positioning seat (40) is fixedly sleeved with the first gear (6132), and the first gear (6132) is respectively meshed with the outer wall of the annular gear ring (612); a limit block (6133) is fixedly provided at the end of the adjusting screw (6131) located on the upper side of the first gear (6132); The lower mold assembly comprises a lower mold base (81), a collar base (82) and a clamping mechanism. The lower mold base (81) is arranged on the upper side of the support base (70) and a cavity groove (811) is provided in the middle of its end surface corresponding to the cavity punch (52). A coaxial collar base (82) is fixedly arranged on the outer ring of the lower mold base (81) and a clamping mechanism is evenly arranged on the end surface of the collar base (82) corresponding to the fastening mechanism. The clamping mechanism comprises a fixed column (831), a positioning head (832) and a sliding head (833). The bottom end of the fixed column (831) is fixedly connected to the end surface of the collar base (82). A positioning head (832) is fixedly arranged on one end of a fixed column (831) away from the collar seat (82) and corresponds to the vertical cavity (610). The fixed column (831) is located on the lower outer wall of the positioning head (832) and is slidably sleeved with a coaxial sliding head (833). The positioning head (832) is a conical structure with a small upper diameter and a large lower diameter. The sliding head (833) is a conical structure with a large upper diameter and a small lower diameter. The maximum outer diameters of the positioning head (832) and the sliding head (833) are not greater than the inner diameter of the vertical cavity (610).

2. The automobile airbag molding equipment according to claim 1, characterized in that: The positioning seat (40) is respectively fixed with lifting ears (41) corresponding to the two legs of the bracket (20), and the inner walls of the two legs of the bracket (20) are respectively provided with vertical sliding grooves corresponding to the lifting ears (41), and the lifting ears (41) are slidably engaged in the corresponding vertical sliding grooves.

3. The automobile airbag molding equipment according to claim 2, characterized in that: The oscillation assembly comprises a telescopic vibration mechanism, an incomplete gear (92), an annular rotating disk (93) and a plurality of sliding mechanisms; the telescopic vibration mechanism comprises a telescopic sleeve (911), a telescopic rod (912) and a third spring (913); the bottom end of the telescopic sleeve (911) is rotatably connected to the end surface of the base (10) and the telescopic sleeve (911) is coaxially arranged with the lower die seat (81); the telescopic sleeve (911) passes through the support seat (70) and is rotatably connected; a sliding groove is provided in the middle of the top surface of the telescopic sleeve (911) and the telescopic rod (912) is slidably arranged in the sliding groove; the top end of the telescopic rod (912) is connected to the bottom surface of the lower die seat (81) and the bottom end of the telescopic rod (912) is connected to the bottom surface of the lower die seat (81) through the third spring ( 913) is connected to the bottom surface of the sliding groove; the outer wall of the telescopic sleeve (911) is located at the lower side of the support seat (70) and is fixedly sleeved with the incomplete gear (92); the annular rotating disk (93) is rotatably arranged between the support seat (70) and the base (10) corresponding to the incomplete gear (92); the annular rotating disk (93) and the telescopic sleeve (911) are coaxially arranged; the inner diameter of the annular rotating disk (93) is not less than twice the maximum outer diameter of the incomplete gear (92); and an inner gear ring is fixedly arranged on the inner wall of the annular rotating disk (93); a second gear (920) is rotatably arranged between the incomplete gear (92) and the inner gear ring, and the second gear (920) can mesh with the tooth segment of the incomplete gear (92) and the inner gear ring. meshing; the support seat (70) is located on the outer ring of the inner gear ring and has a plurality of horizontal slide grooves evenly arranged around its own central axis, a sliding mechanism is arranged in the horizontal slide groove, the sliding mechanism includes a sliding seat (941), a slide rod (942), a limit seat (943), a fourth spring (944) and a connecting rod (945), the sliding seat (941) is arranged corresponding to the horizontal slide groove and the bottom surface of the sliding seat (941) is slidably connected to the end surface of the support seat (70), a slide rod (942) is fixedly arranged in the middle of the bottom surface of the sliding seat (941) corresponding to the horizontal slide groove, an arc-shaped slide groove (930) is arranged on the annular turntable (93) corresponding to the horizontal slide groove, and the end of the slide rod (942) away from the sliding seat (941) passes through the fourth spring (944) from top to bottom in sequence. A limit seat (943) is fixedly arranged at the end portion located behind the horizontal slide groove and the arcuate slide groove (930) and at the lower side of the annular turntable (93); the outer wall of the slide rod (942) is slidably connected to the inner wall of the horizontal slide groove and the arcuate slide groove (930) respectively; the side wall of the slide rod (942) close to the telescopic sleeve (911) is connected to the side wall of the horizontal slide groove through a fourth spring (944); the outer ring of the bottom surface of the lower mold base (81) is rotatably engaged with a coaxial rotating ring (812); the top surface of the slide seat (941) is connected to the bottom surface of the corresponding area of ​​the rotating ring (812) through a connecting rod (945); and the two ends of the connecting rod (945) are rotatably connected to the top surface of the slide seat (941) and the bottom surface of the rotating ring (812) respectively.

4. The automobile airbag molding equipment according to claim 3, characterized in that: The tooth segment length of the incomplete gear (92) is no greater than one quarter of the circumference of its outer ring.

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