Air spring vacuumizing mold

Abstract

The utility model discloses an air spring vacuumizing mold, which belongs to the technical field of vulcanization molds and comprises a lower mold, a middle mold, an upper mold and a capsule. An outer mold cavity is formed in the lower mold, the middle mold and the upper mold, and the capsule is located in the outer mold cavity; the exhaust system comprises a plurality of gas channels and a plurality of vacuum interfaces; the gas channel is communicated with the outer mold cavity and the vacuum interface; the vacuum interface is externally connected with vacuum equipment, and gas between the rubber blank and the outer mold cavity is pumped out through the vacuum interface; by additionally arranging the vacuum connector, vacuumizing is started before mold closing is completed, capsule inflation and vacuumizing are carried out at the same time, and the exhaust efficiency and effect in the vulcanization process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vulcanization mould technical field, concretely relates to air spring vacuum mould. BACKGROUND

[0002] When the air spring mould carries out the bladder skin vulcanization, needs first put the tire blank into the mould cavity, after the mould closing, under the internal pressure effect, the tire blank gradually expands and fills the cavity, in this process, the gas between the tire blank and the mould needs to be discharged from the mould, otherwise it is easy to cause the air pocket, the glue problem such as lack, the existing mould is mainly arranged in the upper and lower positions of the mould to ensure the product appearance, and then the gas between the cavity and the product is discharged through the air line, due to the product height direction dimension is larger, leading to the air pocket problem of being easy to produce in the middle section of the product due to the poor exhaust during vulcanization, if simply adding the air hole, it will also produce the glue hair on the product, in addition to increasing the labor intensity of cutting glue hair, but also to the product appearance. UTILITY MODEL CONTENTS

[0003] For the problems existing in the prior art, the utility model provides an air spring vacuum mould, the mould can actively exhaust the cavity, and the exhaust effect of the mould is guaranteed.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0005] The utility model provides an air spring vacuum mould, including lower mould, middle mould, upper mould and capsule, the lower mould, the middle mould and the upper mould inside form outer mould cavity, and the capsule is located in the outer mould cavity, still include exhaust system, the exhaust system includes a plurality of gas passages and a plurality of vacuum interfaces, the gas passage is connected with the outer mould cavity and the vacuum interface,

[0006] The vacuum interface is connected with vacuum equipment, and the gas between the rubber blank and the outer mould cavity is extracted through the vacuum interface.

[0007] In the air spring vacuum mould, the upper mould is provided with one or more of the upper steel ring, the center rod and the upper sealing plate.

[0008] And / or, the vacuum interface is located at one or both ends of the outer mould cavity.

[0009] And / or, the middle mould cavity of the middle mould is provided with a font ring.

[0010] In the air spring vacuum mould, the upper sealing plate is fixed on the upper end face of the upper mould, and the two are sealingly connected, the butt joint surface of the upper mould and the upper sealing plate is provided with a gas groove, the upper mould is provided with a gas hole, the gas hole is connected with the upper mould cavity and the gas groove, and the vacuum interface is located on the upper mould or the upper sealing plate and is communicated with the gas groove.

[0011] In the air spring vacuum drawing mold, the upper ring is located in the upper cavity of the upper mold; a plurality of air grooves are arranged on the outer side of the upper ring, a plurality of air holes are arranged in the upper ring, the air holes are communicated with the air grooves and the inner cavity of the upper ring; a vacuum interface is arranged on the upper mold, and the vacuum interface is communicated with the air grooves.

[0012] In the air spring vacuum drawing mold, the upper sealing plate is fixed on the upper end face of the upper mold, and the two are sealingly connected;

[0013] And / or, the upper ring has an outwardly extending annular clamping table, which is clamped between the upper mold and the middle mold.

[0014] In the air spring vacuum drawing mold, the center rod comprises an end forming plate and a connecting rod, the end forming plate is located in the upper cavity of the upper mold, the upper mold is provided with a center hole, the connecting rod is slidingly arranged in the center hole, and the lower end of the connecting rod is fixedly connected with the end forming plate; the upper side face of the end forming plate is sealingly connected with the outer mold cavity; or, a sealing element is arranged on the hole wall of the center hole, and dynamic sealing is formed between the outer wall of the connecting rod and the sealing element.

[0015] In the air spring vacuum drawing mold, a first positioning element is arranged at the inner end of the center hole; the first positioning element is annular and extends in the entire circumferential direction of the center hole;

[0016] And / or, the first positioning element is a gasket or is formed by a wear-resistant material deposited on the inner wall of the center hole;

[0017] And / or, the first positioning element is located below the sealing element.

[0018] In the air spring vacuum drawing mold, a plurality of pattern blocks are arranged in the lower cavity of the lower mold, the pattern blocks are connected with the vulcanizing machine through a guide plate, and the guide plate is sealingly located between the middle mold and the lower mold.

[0019] In the air spring vacuum drawing mold, a plurality of the pattern blocks are butted, and the inner side faces are spliced to form a pattern block shaping surface; the guide plate is fixedly connected with the outer circumferential surface of the pattern blocks;

[0020] Or, a sliding block is arranged on the upper end face of the pattern block, the sliding block is slidingly arranged on the guide plate and synchronously lifts and descends with the guide plate, can slide radially relative to the guide plate; a guide strip is fixedly installed on the inner wall of the lower cavity, and the pattern block is slidingly connected with the guide strip.

[0021] Or, a plurality of fixed pattern blocks and a plurality of mobile pattern blocks are arranged in the lower die cavity, and the inner side surfaces of the plurality of mobile pattern blocks are combined into a shaped surface; the fixed pattern blocks are located between two adjacent mobile pattern blocks and are in sliding connection and synchronous lifting with the mobile pattern blocks; the guide plate is fixedly connected with the fixed pattern blocks and drives the fixed pattern blocks to move axially; an inner guide column is fixedly arranged in the lower die cavity of the lower die, the inner guide column is in sliding cooperation with the mobile pattern blocks, and the mobile pattern blocks are guided to move radially in the opening and closing process.

[0022] In the air spring vacuum drawing mold, an upper sealing ring extending upward is arranged on the upper side of the guide plate, and the upper sealing ring is sleeved outside the lower end of the middle die after the mold is closed; a sealing element is arranged on the cooperation surface of the upper sealing ring and the middle die to form dynamic sealing;

[0023] And / or, a second positioning element is arranged on the cooperation surface of the middle die and the upper sealing ring, and the second positioning element protects the sealing element during mold closing;

[0024] And / or, a clamping groove is arranged on the lower end surface of the pattern block, and the clamping groove is close to the inner side edge of the pattern block;

[0025] And / or, an air line is arranged on the inner side surface of the pattern block.

[0026] In the air spring vacuum drawing mold, the inner side surface of the lower die cavity of the lower die is vulcanized and shaped for a rubber blank; a lower sealing plate is arranged on the lower end surface of the lower die, and the lower sealing plate is connected with and sealed with the lower die; an air hole is arranged in the lower die, an air groove is arranged between the lower sealing plate and the lower die, and the air hole communicates with the air groove;

[0027] Or, a lower steel ring is arranged in the lower die cavity of the lower die, and the inner side surface of the lower steel ring is vulcanized and shaped for a rubber blank.

[0028] In the air spring vacuum drawing mold, an extension is arranged on the lower end of the middle die or the upper end of the lower die, the upper end of the lower die is sleeved with the lower end of the middle die after the mold is closed through the extension, and a sealing element is arranged between the extension and the cooperation surface of the lower end of the middle die or the upper end of the lower die;

[0029] And / or, a third positioning element is further arranged between the extension and the upper end of the lower die or the lower end of the middle die, and the third positioning element protects the sealing element during mold closing.

[0030] The beneficial effects of the air spring vacuum drawing mold are as follows:

[0031] The air spring vacuum drawing mold starts vacuum drawing before the mold closing is completed by increasing the vacuum interface, the capsule inflation and vacuum drawing are simultaneously performed, and the exhaust efficiency and effect of the vulcanization process are improved.

[0032] Reduce the air pocket lack of glue phenomenon, improve the yield of product vulcanization, reduce the loss caused by product air pocket;

[0033] No need to add air hole on the shaping surface, no increase the workload of removing glue hair, also ensure the integrity of product appearance;

[0034] The utility model mainly makes change on the mould, has no special requirement to vulcanization machine, and the conventional structure vulcanization machine can be used, and the production factory need not replace the vulcanization machine;

[0035] Not only improve the exhaust, but also optimize the sealing of the cavity; ensure the vacuum effect;

[0036] Can select the upper steel ring, lower steel ring, center rod, pattern block according to the needs, and is suitable for different vulcanization operation needs. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The utility model air spring vacuum mould adopts the overall structure schematic diagram of the first kind of embodiment of pattern block;

[0038] Figure 2 For Figure 1 The enlarged view of area A;

[0039] Figure 3 For the structure schematic diagram of pattern block in the utility model air spring vacuum mould;

[0040] Figure 4 For the utility model air spring vacuum mould, the upper die is the local structure schematic diagram of the first kind of embodiment of the upper end shaping of rubber blank;

[0041] Figure 5 For the utility model air spring vacuum mould, the upper die is the local structure schematic diagram of the second kind of embodiment of the upper end shaping of rubber blank;

[0042] Figure 6 For the utility model air spring vacuum mould, the upper die is the local structure schematic diagram of the first kind of embodiment of the upper end shaping of rubber blank;

[0043] Figure 7 For the utility model air spring vacuum mould, the upper die is the local structure schematic diagram of the second kind of embodiment of the upper end shaping of rubber blank;

[0044] Figure 8 For the utility model air spring vacuum mould, the upper die is the local structure schematic diagram of the first kind of embodiment of the upper end shaping of rubber blank without center rod, upper steel ring and upper die;

[0045] Figure 9The partial structure schematic view of the second embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the center rod is absent, and the upper mould is used for shaping the upper end of the rubber blank;

[0046] Figure 10 The partial structure schematic view of the first embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the pattern block is used for shaping the lower end of the rubber blank;

[0047] Figure 11 The partial structure schematic view of the second embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the pattern block is used for shaping the lower end of the rubber blank;

[0048] Figure 12 The partial structure schematic view of the third embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the pattern block is used for shaping the lower end of the rubber blank;

[0049] Figure 13 The partial structure schematic view of the fourth embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the pattern block is used for shaping the lower end of the rubber blank;

[0050] Figure 14 The partial structure schematic view of the fifth embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the pattern block is used for shaping the lower end of the rubber blank;

[0051] Figure 15 The partial structure schematic view of the sixth embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the pattern block is used for shaping the lower end of the rubber blank;

[0052] Figure 16 The partial structure schematic view of the first embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the lower steel ring is used for shaping the lower end of the rubber blank;

[0053] Figure 17 The partial structure schematic view of the second embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the lower steel ring is used for shaping the lower end of the rubber blank;

[0054] Figure 18 The partial structure schematic view of the third embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the lower steel ring is used for shaping the lower end of the rubber blank;

[0055] Figure 19 The partial structure schematic view of the fourth embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the lower steel ring is used for shaping the lower end of the rubber blank;

[0056] Figure 20 The partial structure schematic view of the first embodiment of the air spring vacuum mould in the utility model is shown in the figure, wherein the lower mould is used for shaping the lower end of the rubber blank;

[0057] Figure 21The lower die is the second embodiment of the partial structure schematic view of the lower die for shaping the lower end of the rubber blank in the air spring vacuum extraction mold.

[0058] Figure 22 The fixed pattern block and the movable pattern block arrangement mode schematic view in the air spring vacuum extraction mold.

[0059] Figure 23 The working principle diagram of the air spring vacuum extraction mold.

[0060] In the drawing,

[0061] 1 - lower die; 2 - pattern block; 3 - middle die; 4 - capsule; 5 - piston rod; 6 - upper steel ring; 7 - upper die; 8 - end forming plate; 9 - center hole; 10 - connecting rod; 11 - upper chuck; 12 - rubber blank; 13 - vacuum interface; 14 - font ring; 15 - ring seat; 16 - lower clamping ring; 17 - air hole; 18 - gap; 19 - air groove; 20 - air line; 21 - upper sealing plate; 22 - first positioning piece; 24 - upper sealing ring; 25 - clamping groove; 26 - second positioning piece; 27 - guide plate; 28 - sliding block; 29 - guide bar; 31 - inner guide column; 32 - lower steel ring; 33 - third positioning piece; 34 - extension; 36 - lower sealing plate; 37 - fixed pattern block; 38 - movable pattern block. DETAILED DESCRIPTION

[0062] In order to facilitate those skilled in the art to understand, the utility model will be further described below in combination with the drawings.

[0063] Please refer to Figures 1-3 , the air spring vacuum extraction mold includes lower die 1, middle die 3, upper die 7 and capsule 4, middle die 3 and upper die 7 are detachably connected, and synchronous lifting, realize with lower die 1's opening, closing of die. After lower die 1, middle die 3 and upper die 7 close the die, form the closed outer die cavity inside, and the partial or all of outer die cavity inner wall vulcanization shaping to the outer wall of rubber blank 12. According to actual needs, can set up upper steel ring 6, center rod etc. in the upper die cavity of upper die 7, set up font ring 14 in the middle die cavity of middle die 3, set up pattern block 2 or lower steel ring 32 etc. in the lower die cavity of lower die 1, provide the required shaping surface for the vulcanization shaping of rubber blank 12. Shaping surface is the surface that directly contacts rubber blank 12 in the vulcanization process, for example, the inner wall surface of the upper die cavity of upper die 7 can be selected as the shaping surface in practical application, the inner side surface of upper steel ring 6 can be used as the shaping surface and so on.

[0064] The capsule 4 is located in the outer mold cavity, the upper end of the capsule 4 is fixed on the upper end of the piston rod 5 through the upper clamp disc 11, and the lower end of the capsule 4 is fixed on the ring seat 15 through the lower clamp ring 16; this is the prior art. The area surrounded by the inner wall of the outer mold cavity and the outer wall of the capsule 4 after inflation and expansion is the cavity of the rubber blank 12, which is used for vulcanization and shaping of the rubber blank 12; in use, the rubber blank 12 is located in the outer mold cavity and is sleeved on the outside of the capsule 4; the capsule 4 is inflated by filling high-temperature and high-pressure gas into the capsule 4, and vulcanization is realized by using the high-temperature environment in the capsule 4. If there is gas between the rubber blank 12 and the inner wall of the outer mold cavity during vulcanization, the air pocket will cause the rubber blank 12 to not adhere to the shaping surface of the outer mold cavity, if there is a texture on the shaping surface of the outer mold cavity, the texture will not be reproduced on the rubber blank 12, resulting in the loss of the texture, the surface of the rubber blank 12 will have a depression after vulcanization, and there will be a color difference between the position where the rubber blank 12 does not adhere and the position where the rubber blank 12 adheres; in order to avoid the foregoing problems, the mold is provided with an exhaust system for exhausting the gas between the rubber blank 12 and the outer mold cavity. The exhaust system includes a plurality of gas channels and a plurality of vacuum interfaces 13, the gas channels are preferably distributed at the upper end and the lower end of the outer mold cavity and are in communication with the vacuum interfaces 13, and the gas channels provide a gas path for extracting the gas between the shaping surface of the outer mold cavity and the rubber blank 12.

[0065] As shown in Figure 2 and Figure 3 , the gas channel includes a gas hole 17, a gas line 20 distributed on the shaping surface, a gap 18 between the mating surfaces, etc.; for example, the gas line 20 is distributed on the shaping surface of the upper mold 7, the pattern block 2, the upper steel ring 6, the lower steel ring 32, etc., and the gas hole 17 is distributed in the upper mold 7, the upper steel ring 6, the lower steel ring 32, the lower mold 1, etc.; the gap 18 is provided between the mating surfaces of the upper steel ring 6 and the upper mold 7, the mating surfaces of the lower steel ring 6 and the lower mold 1, the mating surfaces of the font ring 14 and the middle mold 3, etc., which can be designed according to actual needs, and will not be listed one by one here. The gas channel is in communication with the cavity and the vacuum interface 13, and the vacuum interface 13 can be provided on the upper mold 7, the lower mold 1, the middle mold 3 and other structural components as needed. The vacuum interface 13 is connected to a vacuum device, such as a vacuum pump; after the mold is closed, the gas between the rubber blank 12 and the shaping surface of the outer mold cavity is extracted through the vacuum interface 13, then the capsule 4 is inflated, and the extraction of vacuum is stopped after the capsule 4 reaches the predetermined pressure; during this process, the inflation of the capsule 4 and the extraction of vacuum by the vacuum interface 13 are carried out simultaneously, the capsule 4 expands to push the rubber blank 12 to expand outward, which promotes the exhaust of the gas, the vacuum interface 13 sucks the gas, and the two work together to completely exhaust the gas, so that the rubber blank 12 can well adhere to the shaping surface of the outer mold cavity, and the vulcanization defects are avoided.

[0066] Among them, as shown in Figure 1 and Figure 2As shown, the center rod comprises an end forming plate 8 and a connecting rod 10; in use, the end forming plate 8 is located in the upper die cavity of the upper die 7, and its lower side partially serves as a component of the shaping surface; the upper die 7 is provided with a center hole 9 which penetrates the upper die 7; the connecting rod 10 is slidingly arranged in the center hole 9, and its lower end is fixedly connected with the end forming plate 8; the upper end of the connecting rod 10 is connected with the vulcanizing machine, and under the control of the vulcanizing machine, the end forming plate 8 is driven to move up and down. The end forming plate 8 and the connecting rod 10 are preferably of an integral structure.

[0067] As shown in Figure 1 and Figure 2 , the upper bead 6 is a conical shell, and its inner side serves as a component of the shaping surface. The outer side wall of the upper bead 6 is provided with a plurality of air grooves 19 which preferably extend and distribute in the circumferential direction of the upper bead 6. The groove bottom of the air groove 19 is provided with an air hole 17 which penetrates the side wall of the upper bead 6 and opens on the shaping surface of the upper bead 6. Whether to set the air line 20 can also be selected according to the area size and contour shape of the shaping surface of the upper bead 6, with the primary prerequisite being smooth exhaust. The lower end of the upper bead 6 has an outwardly extending annular clamping table.

[0068] The upper die cavity of the upper die 7 can directly serve as the shaping surface of the upper end of the rubber blank 12, or can jointly form the shaping surface of the upper end of the rubber blank 12 in combination with the center rod and / or the upper bead 6. When the inner side of the upper die cavity of the upper die 7 serves as a component of the shaping surface, the air hole 17 for exhaust of the upper die cavity is located in the upper die 7 and needs to be connected to the outer side of the upper die 7, preferably to the upper end surface of the upper die 7, as shown in Figure 4 and Figure 5 , the upper die 7 further comprises an upper sealing plate 21 which is arranged on the upper end surface of the upper die 7 and is fixedly and sealingly connected with the upper die 7. The abutting surface of the upper die 7 and the upper sealing plate 21 is provided with an air groove 19 which can be located on the lower side of the upper sealing plate 21 or on the upper end surface of the upper die 7, or can be located on both the lower side of the upper sealing plate 21 and the upper end surface of the upper die 7. The air hole 17 connects the air groove 19 with the upper die cavity, and the upper sealing plate 21 or the upper die 7 is provided with a vacuum interface 13, the air hole 17 and the air groove 19 form a gas passage which is connected with the vacuum interface 13. The center hole 9 can be selected to penetrate the upper sealing plate 21 or not to penetrate the upper sealing plate 21.

[0069] The inner side of the font ring 14 serves as a component of the shaping surface, and generally the font ring 14 is installed in the middle die cavity of the middle die 3 and is located at the lower end of the middle die cavity; and jointly with the inner wall of the middle die cavity, it provides the shaping surface for vulcanization of the middle part of the rubber blank 12.

[0070] As the lower die cavity of the lower die 1, the inner wall surface of the lower die 1 can be used as the shaping surface of the lower end of the rubber blank 12; the lower die 1 further comprises a lower sealing plate 36, the lower die 1 is provided with a gas hole 17, and the lower sealing plate 36 is provided with a gas groove 19 on the abutting surface of the lower die 1; the vacuum interface 13 can be arranged on the lower die 1 or the lower sealing plate 36.

[0071] The lower die 1 can also be used in cooperation with the pattern blocks 2, the pattern blocks 2 are located in the lower die cavity of the lower die 1, and the inner side surfaces of the plurality of pattern blocks 2 form the shaping surface for vulcanization and shaping of the lower end of the rubber blank 12. The number of the pattern blocks 2 can be two, which are divided into left and right halves; or six or eight. When the pattern blocks 2 are used, the pattern blocks 2 are driven to move radially and axially by the vulcanizing machine connected to the outside of the guide plate 27, so as to realize mold opening and mold closing. The number of the pattern blocks 2 and the connection mode of the pattern blocks 2 and the guide plate 27 are selected according to actual needs. The lower end surface of the pattern block 2 is provided with a clamping groove 25, and the clamping groove 25 is close to the inner side edge of the pattern block 2; the clamping groove 25 can be used for fixing the rubber blank 12 with a flange.

[0072] When the pattern blocks 2 are divided into left and right halves, as shown in Figure 1 、 Figure 3 、 Figure 10 and Figure 11 , the two pattern blocks 2 are abutted and the abutting surfaces are sealed by the sealing element; the two pattern blocks 2 form a ring-shaped shaping surface after being abutted. The guide plate 27 is fixedly connected with the outer circumferential surface of the pattern block 2, and is preferably an integral structure. The guide plate 27 is located between the middle die 3 and the lower die 1, and the vulcanizing machine is connected to the outside of the guide plate 27, so as to control the radial and axial movement of the pattern block 2 by the vulcanizing machine, and to realize mold opening and mold closing by separate control.

[0073] When the number of the pattern blocks 2 is more than two, which is usually six, the inner side surfaces of the six pattern blocks 2 are sequentially connected to form a ring-shaped shaping surface, as shown in Figure 12 、 13 . The guide plate 27 is located between the middle die 3 and the lower die 1; the pattern block 2 is located in the lower die cavity of the lower die 1, and the upper end surface thereof is fixedly connected with a sliding block 28, which is slidingly arranged on the guide plate 27 and can slide radially relative to the guide plate 27. A guide strip 29 is fixedly installed on the inner wall of the lower die cavity, and extends axially along the taper surface of the lower die cavity, and the upper end of the guide strip 29 is inclined outward; the side surface of the pattern block 2 cooperating with the lower die cavity is provided with a guide groove, which cooperates with the guide strip 29 to guide the pattern block 2 during mold opening and mold closing. The guide plate 27 needs to be connected to a driving device in actual use, and the pattern block 2 and the guide plate 27 are lifted synchronously to realize mold opening and mold closing.

[0074] As shown in Figure 22As shown, when the pattern blocks 2 are divided into fixed pattern blocks 37 and mobile pattern blocks 38, both the fixed pattern blocks 37 and the mobile pattern blocks 38 are in multiple blocks, usually 4 fixed pattern blocks 37 and 4 mobile pattern blocks 38. The inner side of the mobile pattern blocks 38 is spliced into a ring-shaped sizing surface for vulcanization and sizing of the lower end of the rubber blank 12. As shown Figure 14 and Figure 15 As shown, both the fixed pattern blocks 37 and the mobile pattern blocks 38 are arranged in the lower mold cavity, and the fixed pattern blocks 37 are located between two adjacent mobile pattern blocks 38 in the circumferential direction. The guide plate 27 is located between the lower mold 1 and the middle mold 3, and the fixed pattern blocks 37 are fixedly connected with the guide plate 27 and synchronously lifted and lowered. The inner guide column 31 is fixed on the lower mold 1 and extends into the lower mold cavity, and the upper end of the inner guide column 31 extends outwardly and obliquely; the mobile pattern blocks 38 are in sliding fit with the inner guide column 31. The abutting surfaces of the fixed pattern blocks 37 and the mobile pattern blocks 38 are respectively provided with sliding grooves and sliding platforms, for example, the abutting surface of the fixed pattern block 37 is machined with a sliding platform, and the abutting surface of the mobile pattern block 38 is machined with a sliding groove; the sliding platform and the sliding groove can slide relative to each other, thereby realizing synchronous lifting and lowering of the fixed pattern blocks 37 and the mobile pattern blocks 38 in the axial direction, and in the lifting and lowering process, the inner guide column 31 guides the mobile pattern blocks 38 to move radially to open and close the mold. Exemplarily, please refer to Figure 22 , the two abutting surfaces of the same mobile pattern block 38 which cooperate with the fixed pattern blocks 37 are parallel to the radial movement path of the mobile pattern block 38, at this time the sliding platform and the sliding groove slide relative to each other in the radial direction.

[0075] As the first embodiment of the air spring vacuum mold, the upper mold 7 is not used in cooperation with the upper steel ring 6, as shown in Figure 4 , Figure 5 and Figure 9 The inner side of the upper mold cavity of the upper mold 7 can meet the needs of vulcanization and sizing of the rubber blank 12, that is, the inner wall surface of the upper mold cavity is the sizing surface.

[0076] The upper mold 7 is fixedly connected with the middle mold 3 and the abutting surfaces form a seal, and the sealing form can refer to Figure 4 , Figure 5 and Figure 9 A plurality of sealing elements are arranged between the lower end surface of the upper mold 7 and the upper end surface of the middle mold 3; the sealing form of the upper mold 7 and the middle mold 3 is not limited to the sealing mode shown in Figure 4 , Figure 5 and Figure 9 .

[0077] A plurality of sealing elements are arranged between the upper sealing plate 21 and the upper mold 7, and the outer mold cavity is sealed, and the sealing form can refer to Figure 4 , Figure 5 , Figure 9 , but is not limited to the sealing mode shown in Figure 4 , Figure 5 , Figure 9 .

[0078] As the second embodiment of the air spring vacuum mold, the upper die cavity of the upper die 7 is provided with the upper bead ring 6, as shown in Figure 6 、 Figure 7 and Figure 8 . The upper bead ring 6 has a gap 18 between the mating surface of the upper die cavity, and the gap 18 is communicated with the air groove 19 and the air hole 17 of the upper bead ring 6. The upper die 7 is provided with a vacuum interface 13, and the vacuum interface 13 is communicated with the gap 18.

[0079] The lower end of the upper bead ring 6 has an outwardly extending annular clamping platform, which is clamped between the upper die 7 and the middle die 3, and the upper die 7 is fixedly connected with the middle die 3 to fix the upper bead ring 6.

[0080] In order to ensure the sealing of the outer die cavity, sealing is required between the upper bead ring 6 and the upper die 7, and between the upper bead ring 6 and the middle die 3. For example, as shown in Figure 2 , a seal is formed between the outer tapered surface of the upper bead ring 6 and the inner tapered surface of the upper die 7, and a seal is formed between the lower end surface of the upper bead ring 6 and the upper end surface of the middle die 3; or as shown in Figure 6 , the upper die 7 and the upper bead ring 6, and the upper bead ring 6 and the middle die 3 are all provided with multiple mating surfaces, and sealing elements are arranged between the mating surfaces for sealing; or as shown in Figure 7 , a sealing element is arranged between the lower end surface of the upper die 7 and the upper end surface of the middle die 3 to form a seal, and the upper bead ring 6 is surrounded, and at this time, no sealing element is required to be arranged at the mating surface of the upper bead ring 6.

[0081] As the third embodiment of the air spring vacuum mold, the upper die cavity of the upper die 7 is provided with a center rod, as shown in Figure 1 and Figure 2 . Based on different mating modes of the center hole 9 and the connecting rod 10, the sealing forms between the connecting rod 10 and the upper die plate 7 are also different.

[0082] For example, the inner diameter of the center hole 9 is much larger than the outer diameter of the connecting rod 10, and a seal is formed between the upper side surface of the end forming plate 8 and the outer die cavity, as shown in Figure 2 、 Figure 4 、 Figure 7 , etc.; the center hole 9 does not contact the connecting rod 10, which is convenient for mold movement state control and the connecting rod 10 does not wear the upper die 7.

[0083] For another example, as shown in Figure 6As shown, the sealing element is arranged on the hole wall of the center hole 9 to form a dynamic seal between the outer wall of the connecting rod 10. Further, in order to avoid seal wear failure, the inner end of the center hole 9 is provided with a first positioning element 22. The first positioning element 22 can be annular and extend along the entire circumference of the center hole 9; or it can be point-shaped and distributed along the circumference of the inner wall of the center hole 9, in which case the first positioning element 22 needs to be provided in multiple and uniformly distributed along the circumference of the center hole 9. The first positioning element 22 can control the gap between the center hole 9 and the connecting rod 10 during mold opening and closing, improve the movement accuracy, and protect the sealing element. When the upper end of the upper mold plate 7 is sealed by the upper sealing plate 21, the center hole 9 extends into the upper sealing plate 21, and the sealing element and / or the first positioning element 22 are arranged on the upper sealing plate 21.

[0084] Preferably, the first positioning element 22 is located below the sealing element, and the first positioning element 22 contacts the connecting rod 10 before the sealing element during mold closing, thereby playing a positioning role. The first positioning element 22 also separates from the connecting rod 10 later than the sealing element, thereby protecting the sealing element during the relative movement between the center hole 9 and the connecting rod 10.

[0085] In order to meet the installation needs of the center rod, when the upper mold 7 has the upper sealing plate 21, the center hole 9 extends into the upper sealing plate 21.

[0086] As a fourth embodiment of the air spring vacuum mold, as shown in Figure 8 and Figure 9 the upper mold 7 is not provided with a center rod, and the upper mold 1 can be optionally provided with an upper steel ring 6 or without the upper steel ring 6.

[0087] The upper sealing plate 21 is fixedly connected and sealed with the upper mold 7. The upper sealing plate 21 can be a whole plate and does not need to be provided with a center hole; of course, according to actual needs, the upper sealing plate 21 can also be processed with holes, steps and other structures. When the upper sealing plate 21 is provided with the center hole 9, two seals need to be arranged between the upper sealing plate 21 and the upper mold 7, as shown in Figure 9 The two seals are respectively close to the center hole 9 and the outer edge of the upper sealing plate 21 to seal the gas channel between the upper sealing plate 21 and the upper mold 7.

[0088] As a fifth embodiment of the air spring vacuum mold, as shown in Figure 1 and Figure 10 the outer mold assembly includes the pattern block 2, the pattern block 2 is located in the lower mold cavity of the lower mold 1, and the number of the pattern block 2 is two. The guide plate 27 is clamped between the middle mold 3 and the lower mold 1.

[0089] The font ring 14 is installed in the lower part of the middle mold cavity of the middle mold 3, and has a matching surface with the upper end of the pattern block 2. The inner side surface of the pattern block 2 is provided with the air line 20, and a gap 18 is provided between the upper and lower matching surfaces. The vacuum interface 13 is arranged on the lower mold 1, and is communicated with the air line 20 through the gap 18 to realize exhaust.

[0090] In order to match the vacuumizing, the upper end surface of the pattern block 2 and the lower end surface of the middle mold 3, and the lower end surface of the pattern block 2 and the upper end surface of the lower mold 1 are all sealed, and the sealing forms can refer to the sealing forms shown in Figure 1 、 Figure 10 , but are not limited to Figure 1 and Figure 10 .

[0091] Further, as shown in Figure 11 , the upper side surface of the guide plate 27 is provided with an upper sealing ring 24 extending upward, and the upper sealing ring 24 is sleeved on the outer part of the lower end of the middle mold 3. The matching surface of the upper sealing ring 24 and the middle mold 3 is provided with a sealing element, and the upper sealing ring 24 and the middle mold 3 form a dynamic seal.

[0092] In order to avoid the frequent plugging of the upper sealing ring 24 and the middle mold 3 causing the sealing element to fail, the matching surface of the middle mold 3 and the upper sealing ring 24 is provided with a second positioning element 26, which can control the relative position and positioning of the upper sealing ring 24 and the middle mold 3 during the opening and closing of the mold. The second positioning element 26 can be annular and extend around the entire circumference of the middle mold 3, or it can be point-shaped and distributed around the circumference of the outer wall of the middle mold 3. In this case, multiple second positioning elements 26 are required, and they are distributed uniformly around the circumference of the middle mold 3. Preferably, the second positioning element 26 contacts the upper sealing ring 24 before the sealing element when the mold is closed, and plays a positioning role. The second positioning element 26 also separates from the upper sealing ring 24 later than the sealing element, and protects the sealing element during the entire relative movement of the upper sealing ring 24 and the middle mold 3. For the case where the sealing element is installed on the upper sealing ring 24, the second positioning element 26 is located above the sealing element. For the case where the sealing element is installed on the middle mold 3, the second positioning element 26 is located below the sealing element.

[0093] As the sixth embodiment of the air spring vacuumizing mold, as shown in Figure 12 and Figure 13 , the difference from the fifth embodiment is that the number of pattern blocks 2 is six, and the six pattern blocks are sequentially connected to form a ring-shaped pattern block shaping surface. The pattern block 2 is located in the lower mold cavity of the lower mold 1, and is opened and closed under the joint action of the slide block 28, the guide plate 27 and the guide strip 29.

[0094] The font ring 14 is located at the lower end of the middle die cavity of the middle die 3, and the lower end of the font ring 14 extends into the guide plate 27. The vacuum interface 13 is arranged on the middle die 3 and corresponds to the local position of the font ring 14, and communicates and exhausts through the gaps 18 between the font ring 14 and the middle die cavity, the font ring 14 and the pattern block 2, and the font ring 14 and the guide plate 27.

[0095] The upper and lower end faces of the guide plate 27 form planar seals with the middle die 3 and the lower die 1 respectively; or, as shown in Figure 13 , the guide plate 27 is sealed with the lower end of the middle die 3 through the upper sealing ring 24, and the sealing form of the upper sealing ring 24 and the lower end of the middle die 3 can refer to the fifth embodiment of the air spring vacuum mold.

[0096] As the seventh embodiment of the air spring vacuum mold, different from the sixth embodiment, the pattern block 2 includes four fixed pattern blocks 37 and four movable pattern blocks 38. As shown in Figure 14 and Figure 15 , the fixed pattern blocks 37 are fixed in the lower die cavity, and the movable pattern blocks 38 move axially and radially under the cooperation of the guide plate 27 and the inner guide column 31 to realize mold opening and closing. The upper and lower end faces of the guide plate 27 are sealed with the middle die 3 and the lower die 1 respectively.

[0097] As the eighth embodiment of the air spring vacuum mold, as shown in Figures 16-19 , a lower steel ring 32 is arranged in the lower die cavity of the lower die 1, and the inner side surface of the lower steel ring 32 is a shaping surface.

[0098] As the ninth embodiment of the air spring vacuum mold, as shown in Figure 20 , 21 , there is no lower steel ring 32 in the lower die cavity of the lower die 1, and the inner side surface of the lower die cavity of the lower die 1 is a shaping surface.

[0099] In the eighth and ninth embodiments of the air spring vacuum mold, the lower steel ring 32 does not need to be connected with a driving mechanism, and the sealing structure can be as shown in Figure 16 , 17 , the lower end surface of the middle die 3 and the upper end surface of the lower die 1 are abutted and sealed, or the middle die 3 and the lower steel ring 32 and the lower die 1 and the lower steel ring 32 are both sealed; the vacuum interface 13 is arranged on the middle die 3, the lower die 1, or the lower sealing plate 36.

[0100] Further, the lower end of the middle mold 3 or the upper end of the lower mold 1 is provided with an extension 34, the extension 34 is sleeved on the upper end of the lower mold 1 or the lower end of the middle mold 3, and a sealing element is arranged between the mating surfaces. Preferably, a third positioning element 33 is further arranged between the extension 34 and the middle mold 3 or the lower mold 1. The third positioning element 33 can be annular and extend along the entire circumference of the extension 34, or can be point-shaped and distributed along the circumference of the extension 34, in which case multiple third positioning elements 33 are arranged and uniformly distributed along the circumference of the extension 34. The third positioning element 33 can play a guiding role during mold opening and closing, improve movement accuracy, and protect the sealing element.

[0101] Preferably, the third positioning element 33 contacts the opposite plug member before the sealing element during mold closing. For example, when the extension 34 is fixedly connected to the middle mold 3, the sealing element and the third positioning element 33 are simultaneously fixedly installed on the inner circumferential surface of the extension 34, and the sealing element is located above the third positioning element 33 at this time. If the sealing element and the third positioning element 33 are simultaneously located on the lower mold 1, the third positioning element 33 is located above the sealing element. Alternatively, the extension 34 is fixedly connected to the upper end of the lower mold 1, the sealing element and the third positioning element 33 are simultaneously located on the extension 34, and the third positioning element 33 is located above the sealing element at this time. If the sealing element and the third positioning element 33 are simultaneously located on the lower end of the middle mold 3, the sealing element is located above the third positioning element. In summary, the third positioning element 33 protects the sealing element during the entire process when the middle mold 3 and the lower mold 1 are closed.

[0102] The first positioning element 22, the second positioning element 26, and the third positioning element 33 can all be gaskets or formed of a hardfacing material.

[0103] Please refer to the accompanying drawings Figure 23 When the mold is in use,

[0104] First, ensure that the pattern block 2, the guide plate 27, the middle mold 3, the upper steel ring 6, the upper mold 7, and the upper center rod are in the mold opening state to provide sufficient space for placing the rubber blank 12;

[0105] After the rubber blank 12 is placed in position, the upper center rod descends and clamps the upper end of the rubber blank 12 together with the inner mold assembly, and the pattern block 2 and the guide plate 27 descend synchronously and clamp the lower end of the rubber blank 12 together with the inner mold assembly;

[0106] After the rubber blank 12 is clamped, the middle mold 3, the upper steel ring 6, and the upper mold 7 descend together to close the mold;

[0107] After the mold is closed, the vacuum equipment is used to exhaust through the vacuum interface 13, the air line 20, the air hole 17, the air groove 19, etc., and the capsule 4 is maintained under vacuum during the inflation process until the pressure in the capsule 4 reaches the set value.

[0108] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum mould for air spring, comprising a lower mould (1), a middle mould (3), an upper mould (7) and a capsule (4); the lower mould (1), the middle mould (3) and the upper mould (7) form an outer mould cavity inside, and the capsule (4) is located in the outer mould cavity; characterized in that, Further comprising an exhaust system, the exhaust system comprising a plurality of gas channels and a plurality of vacuum interfaces (13); the gas channels communicate the outer mold cavity and the vacuum interfaces (13); The vacuum interfaces (13) are connected with vacuum devices, and the gas between the rubber blank (12) and the outer mold cavity is extracted through the vacuum interfaces (13).

2. The air spring vacuuming mold of claim 1, wherein, The upper mold (7) is provided with one or more of an upper steel ring (6), a center rod, and an upper sealing plate (21); And / or, the vacuum interfaces (13) are located at one or both ends of the outer mold cavity; And / or, the middle mold cavity of the middle mold (3) is provided with a font ring (14).

3. The air spring vacuuming mold of claim 2, wherein, The upper sealing plate (21) is fixed on the upper end surface of the upper mold (7) and is sealingly connected thereto; the abutting surface of the upper mold (7) and the upper sealing plate (21) is provided with a gas groove (19); the upper mold (7) is provided with a gas hole (17), and the gas hole (17) communicates the upper mold cavity and the gas groove (19); the vacuum interface (13) is located on the upper mold (7) or the upper sealing plate (21) and communicates with the gas groove (19).

4. The air spring vacuuming mold of claim 2, wherein, The upper steel ring (6) is located in the upper mold cavity of the upper mold (7); the outer side surface of the upper steel ring (6) is provided with a plurality of gas grooves (19), and the inner cavity of the upper steel ring (6) is provided with a plurality of gas holes (17); the gas holes (17) communicate the gas grooves (19) and the inner cavity of the upper steel ring (6); the upper mold (7) is provided with a vacuum interface (13), and the vacuum interface (13) communicates the gas groove (19).

5. The air spring vacuuming mold of claim 4, wherein, The upper sealing plate (21) is fixed on the upper end surface of the upper mold (7) and is sealingly connected thereto; And / or, the upper steel ring (6) has an outwardly extending annular clamping platform which is clamped between the upper mold (7) and the middle mold (3).

6. The air spring vacuuming mold of claim 2, wherein, The center rod comprises an end forming plate (8) and a connecting rod (10); the end forming plate (8) is located in the upper mold cavity of the upper mold (7); the upper mold (7) is provided with a center hole (9); the connecting rod (10) is slidingly arranged in the center hole (9); the lower end of the connecting rod (10) is fixedly connected with the end forming plate (8); The upper side surface of the end forming plate (8) forms a seal with the outer mold cavity; or, a sealing member is arranged on the hole wall of the center hole (9) to form a dynamic seal with the outer wall of the connecting rod (10).

7. The air spring vacuuming mold of claim 6, wherein, The inner end of the center hole (9) is provided with a first positioning member (22); the first positioning member (22) is annular and extends in the entire circumferential direction of the center hole (9); And / or, the first positioning member (22) is a gasket or is formed by a wear-resistant material deposited on the inner wall of the center hole (9) by surfacing; And / or, the first positioning member (22) is located below the sealing member.

8. The air spring vacuuming mold of claim 1, wherein, A plurality of pattern blocks (2) are arranged in the lower mold cavity of the lower mold (1); the pattern blocks (2) are connected with a vulcanizing machine through a guide plate (27); and the guide plate (27) is located between the middle mold (3) and the lower mold (1) and is sealingly connected.

9. The air spring vacuuming mold of claim 8, wherein, A plurality of the pattern blocks (2) are butted, and the inner side surfaces are spliced into a pattern block shaping surface; the guide plate (27) is fixedly connected to the outer circumferential surface of the pattern block (2); Or, the upper end surface of the pattern block (2) is provided with a sliding block (28), the sliding block (28) is slidingly arranged on the guide plate (27) and synchronously lifts and falls with the guide plate (27), and can slide radially relative to the guide plate (27); the lower mold cavity inner wall is fixedly provided with a guide strip (29), and the pattern block (2) is slidingly connected with the guide strip (29); Or, the lower mold cavity is provided with a plurality of fixed pattern blocks (37) and a plurality of movable pattern blocks (38), and the inner side surfaces of a plurality of the movable pattern blocks (38) are spliced into a shaping surface; the fixed pattern blocks (37) are located between two adjacent movable pattern blocks (38) and are slidingly connected with the movable pattern blocks (38) and synchronously lift and fall; the guide plate (27) is fixedly connected to the fixed pattern blocks (37) and drives the fixed pattern blocks (37) to lift and fall; the lower mold cavity of the lower mold (1) is fixedly provided with an inner guide column (31), the inner guide column (31) is slidingly matched with the movable pattern blocks (38), and guides the movable pattern blocks (38) to move radially in the opening and closing process.

10. The air spring vacuuming mold of claim 8, wherein, The upper side surface of the guide plate (27) is provided with an upper sealing ring (24) extending upwardly therefrom, the upper sealing ring (24) is sleeved on the lower end outer portion of the middle mold (3) after closing; the upper sealing ring (24) is provided with a sealing element on the matching surface of the middle mold (3), forming dynamic sealing; And / or, the matching surface of the middle mold (3) and the upper sealing ring (24) is provided with a second positioning element (26), which protects the sealing element during closing; And / or, the lower end surface of the pattern block (2) is provided with a clamping groove (25), which is close to the inner side edge of the pattern block (2); And / or, the inner side surface of the pattern block (2) is provided with an air line (20).

11. The air spring vacuuming mold of claim 1, wherein, The inner side surface of the lower mold cavity of the lower mold (1) is a rubber blank (12) vulcanization shaping; the lower end surface of the lower mold (1) is provided with a lower sealing plate (36), the lower sealing plate (36) is connected with the lower mold (1) and is sealed; the lower mold (1) is provided with an air hole (17), the lower sealing plate (36) and the lower mold (1) are provided with an air groove (19), and the air hole (17) communicates with the air groove (19); Or, the lower mold cavity of the lower mold (1) is provided with a lower steel ring (32), and the inner side surface of the lower steel ring (32) is a rubber blank (12) vulcanization shaping.

12. The air spring vacuuming mold of claim 11, wherein, The lower end of the middle mold (3) or the upper end of the lower mold (1) is provided with an extension (34), the upper end of the lower mold (1) is sleeved with the lower end of the middle mold (3) after closing through the extension (34), and a sealing element is arranged between the extension (34) and the matching surface of the lower end of the middle mold (3) or the upper end of the lower mold (1); And / or, the extension (34) and the upper end of the lower die (1) or the lower end of the middle die (3) are further provided with a third positioning member (33), which protects the sealing member when the die is closed.

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