Air bag rubber bag injection mold
Through the design of the injection mold structure and exhaust system, the problem of low pass rate and low efficiency of molded molds in the production of air-pack rubber capsules is solved, and efficient and safe rubber capsule production is achieved.
Patent Information
- Application Number
- CN202421743340.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-23
AI Technical Summary
When producing air-pack rubber capsules, existing molded molds have problems with low product qualification rate and low production efficiency, especially when there is safety risk during the flip of large-diameter molds and it is difficult to process thin-wall rubber products with high hardness.
The injection mold structure is adopted, including upper mold, middle mold, lower mold and mold core, and multiple exhaust grooves and skeletons are set up. The injection method is used to make the rubber flow evenly, eliminating the flip process, combining the exhaust system and positioning rod positioning to avoid safety risks caused by mold flip.
It improves the product's pass rate and production efficiency, reduces appearance defects, shortens processing time, reduces the unqualified rate, and improves the product's surface quality and processing efficiency.
Smart Images
Figure CN223147623U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machining of mechanical manufacturing dies, and particularly relates to an air bag rubber capsule injection die. Background Art
[0002] In the production process of air bag rubber capsule products, the product wall thickness is thin, the size is large, and if the air bag capsule is to be resistant to harsh working conditions, have a long service life and good quality, rubber with a relatively high hardness must be used, and the produced product must have good compactness.
[0003] At present, a die structure of a pressing structure is generally adopted. When adopting the pressing structure, the die structure must be designed with the product inverted. This structure is a relatively common two-opening die with a die core in the pressing structure. The advantage of this mechanism is that it can ensure accurate positioning of the die core, so that the wall thickness of the rubber product after molding is uniform. However, this structure also has disadvantages. The die core is easily damaged when placed in the middle die, and it is necessary to use an upper die with a pouring cavity to inject glue for it. Otherwise, the glue cannot flow to the lowest end. After the molding is completed, it is necessary to use a flipping tooling to flip the whole die. After taking out the lower die and then taking out the middle die, the die core can be taken out from the cavity. Since the diameter of the die for producing air bag rubber capsule products is large, the outer shape of the die is about φ750, and the whole die weighs about one ton. When using the flipping tooling to flip the die, there will surely be safety risks and the production efficiency will be low. Therefore, the pressing die structure with a material cavity has low practicability, and thin-walled rubber products are not conducive to being processed by the pressing method. For the pressing structure, the higher the material hardness and the poorer the fluidity of the glue, the more likely it is to have air curling at the bottom, resulting in a low qualified rate of the product.
[0004] Therefore, the currently used pressing die can no longer meet the production requirements, and the production efficiency of the pressing die is low. There is an urgent need for a die with a high qualified rate and high production efficiency. Summary of the Invention
[0005] The purpose of the utility model is to provide an air bag rubber capsule injection die to at least solve the problems of low qualified rate and low production efficiency of the existing technology products.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] An air bag rubber capsule injection die includes an upper die, a middle die, a lower die and a die core; an upper cover is arranged above the upper die, a plurality of glue injection ports are arranged on the upper cover, a glue injection channel is arranged on the upper die, and the glue injection ports are communicated with the glue injection channel;
[0008] The middle die and the die core are both arranged below the upper die, the die core is fixed to the upper die, and the middle die surrounds the die core and is arranged outside the die core;
[0009] The lower die is arranged below the middle die and the die core, and the lower die and the middle die form a conical surface fit;
[0010] A cavity is formed among the middle die, the die core, the lower die and the upper die. The cavity is communicated with the glue injection channel. A skeleton is arranged in the cavity below the die core. The skeleton is fixed to the die core. The mold is provided with an exhaust system.
[0011] Further, a threaded hole is arranged in the center of the skeleton, and a bolt hole corresponding to the threaded hole is arranged through the center of the die core. The skeleton and the die core are positioned by sequentially passing a positioning rod through the bolt hole and the threaded hole.
[0012] Further, a groove is arranged at the bottom of the upper die, and the upper end of the positioning rod is fixed in the groove.
[0013] Further, the lower die includes a first lower die and a second lower die. The first lower die is arranged below the middle die, and the second lower die is arranged below the first lower die. The first lower die and the second lower die are fixedly arranged.
[0014] Further, the exhaust system includes an exhaust groove one, a plurality of exhaust grooves two, a plurality of exhaust grooves three, an exhaust groove four and an exhaust groove five. The exhaust groove one is arranged in the gap between the threaded hole and the positioning rod. The exhaust grooves two are arranged at intervals in the middle of the upper die. The exhaust grooves three are arranged at intervals between the upper end of the positioning rod and the die core. The exhaust groove four is arranged at the joint of the middle die and the first lower die. The exhaust groove five is arranged at the glue injection port.
[0015] Further, a first parting line is arranged between the upper die and the die core, a second parting line is arranged between the upper die and the middle die, and a third parting line is arranged between the middle die and the first lower die.
[0016] Further, a plurality of positioning parts are arranged on the outer side walls of the middle die and the first lower die.
[0017] Further, the positioning part is a guide pin.
[0018] Further, a guide ring is arranged above the glue injection port of the upper cover.
[0019] Further, a plurality of lifting lugs are symmetrically arranged on the outer wall of the middle die.
[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0021] The mold of the present utility model overcomes the drawbacks of the traditional molding structure. By setting multiple exhaust grooves, it reduces the appearance defects of products caused by poor exhaust. At the same time, due to the injection method, the rubber material flows more evenly, resulting in better compactness of the product, making its appearance quality brighter. It solves the problems of frequent air entrapment and lack of glue during the production of airbag capsules. Through the injection structure, the process of pasting glue is omitted. And after mold closing, the exhaust time in the molding structure process is reduced. This process can save 15 - 20 minutes, reducing the total vulcanization time by 25% to 30%. In addition, the mold structure avoids the unsafe operation process of mold flipping for demolding. Thus, the present utility model reduces the unqualified rate of products, improves the surface quality of products, shortens the processing time of products, reduces the processing steps of products, and greatly improves the processing efficiency of products. Brief Description of the Drawings
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0023] Figure 1 is a schematic cross-sectional view of the present utility model;
[0024] Figure 2 is Figure 1 a schematic view of the middle cavity;
[0025] Figure 3 is a top view of the present utility model;
[0026] The labels in the figure are:
[0027] 1 - guide ring, 2 - upper cover, 3 - upper mold, 4 - middle mold, 5 - lifting lug, 6 - guide pin, 7 - first lower mold, 8 - second lower mold, 9 - mold core, 10 - positioning rod, 11 - skeleton. Detailed Embodiment
[0028] For the convenience of understanding the present utility model, the following will describe the present utility model more comprehensively with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.
[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "middle", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0031] Meanwhile, in the description of the present utility model, terms such as "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance. Of course, such objects can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.
[0032] Embodiment:
[0033] As Figure 1 shown, this embodiment provides an air bag rubber bladder injection mold. Using the pressure of an injection machine, the molten rubber material is injected into the mold cavity. During the injection process, the rubber material quickly fills the cavity under high pressure and undergoes a cross-linking reaction under the action of high temperature and pressure to finally form a finished product. The mold includes an upper mold 3, a middle mold 4, a lower mold, and a mold core 9. An upper cover 2 is provided above the upper mold 3. Twelve rubber injection ports are evenly arranged on the upper cover 2. The rubber injection ports adopt a rectangular 10x0.8 structure. In order to ensure the accurate positioning of the rubber injection ports and the injection head of the machine, a guide ring 1 is provided above the rubber injection ports. The middle of the guide ring 1 is conical. The guide ring 1 is connected to the top surface of the upper cover 2 by bolts. A rubber injection channel is provided on the upper mold 3, and the rubber injection channel is communicated with the rubber injection ports.
[0034] Furthermore, both the middle mold 4 and the mold core 9 are arranged below the upper mold 3. A number of bolt holes are provided on the mating surface between the mold core 9 and the upper mold 3, and the mold core 9 is fixed to the upper mold 3 by bolts. The middle mold 4 surrounds the mold core 9 and is arranged outside the mold core 9. The lower mold is arranged below the middle mold 4 and the mold core 9, and a conical fit for protecting and roughly positioning the mold core 9 is formed at the mating part with the middle mold 4. When the mold core 9 is padded with rubber so that its height is higher than the mold closing height, the injection machine can be automatically closed through the conical fit, and the mold core 9 can be automatically positioned during mold closing.
[0035] There is a first parting line between the upper mold 3 and the mold core 9, a second parting line between the upper mold 3 and the middle mold 4, and a third parting line between the middle mold 4 and the first lower mold 7.
[0036] As Figure 2 shown, a cavity is formed among the middle mold 4, the mold core 9, the lower mold and the upper mold 3. The cavity is communicated with the injection channel. A skeleton 11 is arranged in the cavity below the mold core 9. A threaded hole is arranged in the center of the skeleton 11. The skeleton 11 is fixed on the mold core 9 through the threaded hole. In order to prevent the rubber material from sinking after being in a molten state and failing to play a positioning role, a bolt hole corresponding to the threaded hole is arranged through the center of the mold core 9. The skeleton 11 is positioned by passing a positioning rod 10 through the bolt hole and the threaded hole in sequence.
[0037] The positioning rod 10 includes a bolt and a nut. A groove is arranged at the bottom of the upper mold 3. After the positioning rod 10 passes through the bolt hole and the threaded hole, the upper end of the bolt is fixed in the groove through the nut. After the demolding is completed, the positioning rod 10 is removed without affecting the use of the product.
[0038] Furthermore, in order to facilitate the processing of the bottom structure of the product, the lower mold is divided into two parts, which is convenient for five-axis milling machine processing and reduces the safety hazards existing in turning processing due to excessive weight. The lower mold includes a first lower mold 7 and a second lower mold 8. The first lower mold 7 is arranged below the middle mold 4, and the second lower mold 8 is arranged below the first lower mold 7. The first lower mold 7 and the second lower mold 8 are fixed by bolts.
[0039] An exhaust system is arranged in this mold to ensure that the gas at the corners of the cavity can be discharged in time during the injection process. The exhaust system includes a first exhaust groove, three second exhaust grooves, three third exhaust grooves, a fourth exhaust groove and a fifth exhaust groove.
[0040] The first exhaust groove is arranged in the gap between the threaded hole and the positioning rod 10, and the gap distance is 0.5 - 0.8 mm, which can not only play a positioning role but also meet the exhaust requirements.
[0041] The second exhaust grooves are evenly arranged in the middle of the upper mold 3. When the upper mold 3 presses the mold core 9 under the pressure of the vulcanizing machine, the second exhaust grooves just correspond to the inside of the groove reserved for the positioning rod 10.
[0042] The third exhaust grooves are arranged at intervals between the upper end of the positioning rod 10 and the mold core 9. When the positioning rod 10 tightens the skeleton 11, the bolt and nut of the positioning rod 10 just fit on the mold core 9, which is convenient for exhaust.
[0043] The fourth exhaust groove is arranged at the mating part of the middle die 4 and the first lower die 7. The fourth exhaust groove has a relatively large volume to ensure that a large amount of gas is discharged from the middle. During production, the first lower die 7 and the second lower die 8 are connected by bolts. Since the first lower die 7 is an annular part, in order to prevent stress deformation after processing or during use, the lower die and the middle die 4 are of a closed structure in terms of mating. The setting of the fourth exhaust groove facilitates the outflow of gas from the conical surface mating part.
[0044] The fifth exhaust groove is arranged at the glue injection port, and the excess gas is discharged through the upper die 3.
[0045] As Figure 3 shown, in this embodiment, four positioning parts are symmetrically arranged on the outer side walls of the middle die 4 and the first lower die 7. The positioning parts are guide pins 6 to avoid bumping the die core 9 due to improper operation.
[0046] Two lifting lugs 5 are symmetrically arranged on the outer wall of the middle die 4 in the horizontal direction.
[0047] Furthermore, in order to consider the durability and corrosion resistance of this mold, the whole mold is chrome-plated on the metal surface.
[0048] The usage process of this embodiment is as follows:
[0049] 1. Place this mold at the very middle position of the flat plate. Four fixing screws are placed on the front and back sides. Do not screw them on first. Push the whole mold into the vulcanizer and align it without the die core 9 (make the glue injection port fit the hemispherical surface of the upper cover 2 in the working state).
[0050] 2. After aligning the position, fix the bottom screws and then lift the upper plate of the vulcanizer and withdraw this mold.
[0051] 3. Open this mold, fasten the skeleton 11 on the die core 9, place the rubber material at the middle position at the bottom of the die core 9, place the die core 9. When placing it, the die core 9 must be in the middle position to prevent pressing the die core 9 and the lower die. Then place 3 places of rubber material at the upper position of the die core 9 to prevent this mold from being damaged when the middle die 4 is closed.
[0052] 4. Close the middle die 4. The guide pins 6 must correspond to the engraved numbers. There are engraved numbers (1 - 4) on the guide pins 6.
[0053] 5. Close the upper die 3 and the upper cover 2, and push this mold into the vulcanizer.
[0054] 6. Apply pressure to the upper plate of the vulcanizer. After this mold is in the correct position, rubber can be injected to process the product.
[0055] 7. After the product is kept under appropriate pressure and temperature for a certain period of time, open the mold and demold. When this mold is opened, this mold must be pushed out as a whole before opening the mold. After the product is removed, production can be carried out again.
[0056] The demolding process of this embodiment is as follows:
[0057] Water is injected into the interior of the mold core 9 from the middle of the mold core 9 using a special pipe joint. Considering that the product is bonded to the mold core 9 after vulcanization, the water must be pressurized. Under the state of water pressure and its own weight, the product is slowly removed.
[0058] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention pertains, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.
Claims
1. An air bag rubber bladder injection mold, characterized in that: It includes an upper die (3), a middle die (4), a lower die and a die core (9); an upper cover (2) is arranged above the upper die (3), several glue injection ports are arranged on the upper cover (2), a glue injection channel is arranged on the upper die (3), and the glue injection ports are communicated with the glue injection channel; Both the middle die (4) and the die core (9) are arranged below the upper die (3), the die core (9) is fixed to the upper die (3), and the middle die (4) surrounds the die core (9) and is arranged outside the die core (9); The lower die is arranged below the middle die (4) and the die core (9), and the lower die and the middle die form a conical surface fit; A cavity is formed among the middle die (4), the die core (9), the lower die and the upper die (3), the cavity is communicated with the glue injection channel, a skeleton (11) is arranged in the cavity below the die core (9), the skeleton (11) is fixed to the die core (9), and the mold is provided with an exhaust system.
2. The injection mold for an air bag rubber bladder according to claim 1, wherein: A threaded hole is arranged in the center of the skeleton (11), a bolt hole corresponding to the threaded hole is arranged through the center of the die core (9), and the skeleton (11) and the die core (9) are positioned by sequentially passing a positioning rod (10) through the bolt hole and the threaded hole.
3. The injection mold for an air bag rubber bladder according to claim 2, wherein: A groove is arranged at the bottom of the upper die (3), and the upper end of the positioning rod (10) is fixed in the groove.
4. The air bag rubber bladder injection mold according to claim 2, characterized in that: The lower die includes a first lower die (7) and a second lower die (8), the first lower die (7) is arranged below the middle die (4), the second lower die (8) is arranged below the first lower die (7), and the first lower die (7) and the second lower die (8) are fixedly arranged.
5. The injection mold for an air bag rubber bladder according to claim 4, characterized in that: The exhaust system includes an exhaust groove one, a plurality of exhaust grooves two, a plurality of exhaust grooves three, an exhaust groove four and an exhaust groove five. The exhaust groove one is arranged in the gap between the threaded hole and the positioning rod (10), the exhaust grooves two are arranged at intervals in the middle of the upper die (3), the exhaust grooves three are arranged at intervals between the upper end of the positioning rod (10) and the die core (9), the exhaust groove four is arranged at the mating part of the middle die (4) and the first lower die (7), and the exhaust groove five is arranged at the glue injection port.
6. The injection mold for an air bag rubber bladder according to claim 4, wherein: A parting line one is arranged between the upper die (3) and the die core (9), a parting line two is arranged between the upper die (3) and the middle die (4), and a parting line three is arranged between the middle die (4) and the first lower die (7).
7. An air bag rubber bladder injection mold according to claim 4, characterized in that: A plurality of positioning parts are arranged on the outer side walls of the middle die (4) and the first lower die (7).
8. An injection mold for an air bag rubber bladder according to claim 7, characterized in that: The positioning part is a guide pin (6).
9. An injection mold for an air bag rubber bladder according to claim 1, wherein: A guide ring (1) is arranged above the glue injection port of the upper cover (2).
10. The injection mold for an air bag rubber bladder according to claim 1, characterized in that: A plurality of lifting lugs (5) are symmetrically arranged on the outer wall of the middle die (4).