CN116461041A - Seamless rubber air bag forming process - Google Patents
Seamless rubber air bag forming process Download PDFInfo
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- CN116461041A CN116461041A CN202310728049.8A CN202310728049A CN116461041A CN 116461041 A CN116461041 A CN 116461041A CN 202310728049 A CN202310728049 A CN 202310728049A CN 116461041 A CN116461041 A CN 116461041A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008569 process Effects 0.000 title claims abstract description 32
- 238000004073 vulcanization Methods 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 20
- 239000000047 product Substances 0.000 claims abstract description 17
- 238000009966 trimming Methods 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 239000011265 semifinished product Substances 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 23
- 238000000465 moulding Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000001746 injection moulding Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 3
- 230000010349 pulsation Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 28
- 238000013461 design Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/022—Melting the material to be shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/43—Removing or ejecting moulded articles using fluid under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C2045/0075—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping curing or polymerising by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C2045/0077—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping removing burrs or flashes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
- B29L2022/02—Inflatable articles
- B29L2022/027—Air bags
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a seamless rubber air bag forming process, which relates to the technical field of rubber air bag preparation and comprises the following steps: rubber storage, wherein preheating plasticization is carried out in a rubber storage feeding cylinder; injecting rubber into a mould, wherein the rubber is preheated to be in a plasticizing state, and the mould is required to be vacuumized; vulcanizing and forming, namely vulcanizing and forming the rubber into a rubber air bag in a mold at a high temperature after injection is completed; demolding the semi-finished product, injecting air from one end of the mold core, and driving the molded rubber air bag to perform air blowing demolding; trimming, namely trimming the rubber air bag slitter edges; and (5) secondary vulcanization. The rubber air bag finished product produced by the seamless rubber air bag forming process provided by the invention has an integrated structure, is seamless, has large deformation and sufficient bearing capacity, and meets the requirements of long-term recovery and storage of energy, absorption of pressure pulsation and alleviation of hydraulic impact of the accumulator.
Description
Technical Field
The invention relates to the technical field of rubber air bag preparation, in particular to a seamless rubber air bag forming process.
Background
The pneumatic accumulator is one high pressure hydraulic element and consists of mainly pressure bearing casing, rubber air bag and valve, and is used widely in automobile, engineering machine, ship, aviation, etc. The air bag type energy accumulator realizes the energy storage and release of a hydraulic system by utilizing the contraction and expansion process (the compressibility of gas) of the air bag, and the fatigue life of the air bag is a core index for determining the quality and the reliability of the hydraulic energy accumulator.
At present, the domestic energy accumulator rubber air bag is of a multi-section bonding type structure, and the domestic production process is still split type compression molding, and a flat vulcanizing machine is utilized to enable sizing materials to be molded in a plurality of molds (an upper half part of the air bag and a lower half part of the air bag) respectively, and then the final air bag is formed by bonding and splicing glue. Obviously, the bonding air bag has a discontinuous material area, has small deformation, insufficient bearing capacity and poor fatigue resistance, is easy to form stress concentration at joints in the use process to cause premature cracking and failure of the air bag, cannot meet the requirements of long-term recovery and storage of energy, absorption of pressure pulsation and alleviation of hydraulic impact of the energy accumulator, seriously influences the integral quality and service life of the capsule type energy accumulator, and particularly cannot meet the market requirements of high-end energy accumulators.
Disclosure of Invention
The invention aims to provide a seamless rubber air bag forming process, which solves the problems in the prior art, and the air bag finished product is of an integrated structure, has no seam, large deformation and sufficient bearing capacity, and meets the requirements of long-term recovery and storage of energy, absorption of pressure pulsation and alleviation of hydraulic impact of an energy accumulator.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a seamless rubber air bag forming process, which designs a heating structure and a feeding machine structure according to the viscosity of raw materials, the vulcanization time and the like, and relates to a rubber injection part structure according to the characteristics of the material amount of a single product, the flow rate of heated rubber and the like; the method designs the content structures such as a vulcanizing part heating plate and the like according to the use requirement of the product, designs a die and a demolding structure according to the structure of the product, designs a secondary processing technology for the product according to the final requirement of the product, comprises trimming, secondary vulcanization and the like, and specifically comprises the following steps:
firstly, rubber storage, namely preheating and plasticizing in a rubber storage feeding cylinder;
injecting rubber into a mould, wherein the rubber is preheated to be in a plasticizing state, and the mould is required to be vacuumized;
step three, vulcanization molding, namely, after injection molding is completed, vulcanizing and molding the rubber in a mold at a high temperature to form a rubber air bag;
step four, demoulding the semi-finished product, namely injecting air from one end of the mould core to drive the formed rubber air bag to perform air blowing demoulding;
trimming, namely trimming the waste edges of the rubber air bags;
step six, secondary vulcanization, namely, the cooled rubber air bag enters an oven for secondary heating vulcanization, so that the vulcanization degree of the rubber air bag is improved, and the quality and the stability of a product are ensured; the seamless rubber air bag for the hydraulic accumulator, which is manufactured and produced by the invention, has no seam, and can avoid the problems that the traditional bonding air bag is easy to form stress concentration at the seam to cause early cracking failure of the air bag, the energy accumulator can not be recycled for a long time, the pressure pulsation is absorbed and the hydraulic impact is alleviated, the integral quality and the service life of the rubber bag type energy accumulator are seriously influenced, and the market demand of the high-end energy accumulator can not be met in particular.
Optionally, the first step comprises the steps of conveying the strip-shaped rubber raw materials stored in the storage box to a prefabricating opening through a material clamp by a feeder, automatically cutting the strip-shaped rubber raw materials by a cutting device at the prefabricating opening according to the single-group rubber dosage, conveying the cut strip-shaped rubber raw materials into a feeding cylinder for preheating plasticizing at 70-85 ℃, and finishing material prefabrication.
Optionally, the rubber injection is preceded by a mould closing operation, the mould closing adopts a full-hydraulic mould closing device, the oil cylinder drives the upper mould to move to realize the mould closing with the lower mould, oil is filled into the oil cylinder from the oil tank through the self-sucking port during the action of the oil cylinder, and when the mould closing is completed, the oil filling is stopped, and the self-sucking port is cut off by the self-sucking valve to realize the pressurizing mould locking of the oil cylinder.
Optionally, the bottom of the mold core is provided with an air port, the air port is externally connected with an air pump, when the semi-finished product is demolded, the oil cylinder acts reversely, the upper mold is opened, the air pump blows air into the rubber air bag from the air port, so that the rubber air bag is expanded, and the rubber air bag is driven to demold outwards.
Optionally, in order to overcome the defects of small deformation, insufficient bearing capacity, poor fatigue resistance and the like of the multi-section bonding air bag, the invention designs a seamless air bag structure, the inner wall of the seamless air bag is integrally formed with a reinforcing part, the fatigue life of the air bag can be essentially prolonged, the inner wall of the rubber air bag is uniformly provided with a plurality of reinforcing parts, and the reinforcing parts and the rubber air bag are integrally formed.
Optionally, the reinforcement part comprises a first reinforcement rib and a second reinforcement rib which are symmetrically arranged; the transverse section of the first reinforcing rib is of a triangular structure, and the length of the side edge of the triangular structure, which is far away from one end of the second reinforcing rib, is longer than that of the side edge of the triangular structure, which is close to one end of the second reinforcing rib; the second reinforcing rib structure is the same as the first reinforcing rib structure.
Compared with the prior art, the invention has the following technical effects:
the seamless rubber air bag molding process disclosed by the invention has the advantages that the whole manufactured rubber air bag is smooth, flat and seamless, and the strength is uniform. In addition, the thickening design of the local reinforcing part of the inner cavity of the balloon body is utilized to limit the over-expansion deformation of the balloon, so that the fatigue is avoided to happen prematurely, and the service life is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a process flow for forming a seamless rubber airbag according to the invention;
FIG. 2 is a schematic view of a portion of the inside of a rubber bladder according to the present invention;
reference numerals illustrate: 1-rubber air bag, 2-reinforcing part, 201-first reinforcing rib, 202-second reinforcing rib.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a seamless rubber air bag forming process, which solves the problems in the prior art, and the air bag finished product is of an integrated structure, has no seam, large deformation and sufficient bearing capacity, and meets the requirements of long-term recovery and storage of energy, absorption of pressure pulsation and alleviation of hydraulic impact of an energy accumulator.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides a seamless rubber air bag forming process, which is designed to overcome the technical bottlenecks of high rubber viscosity, poor fluidity, easy scorching at high temperature and the like, and comprises the process flows of material storage, heating, injection, vulcanization, demolding, trimming and the like, and the whole process from design to production and manufacture of a novel air bag is completed, as shown in figure 1, and specifically comprises the following steps:
firstly, rubber storage, namely conveying a strip-shaped rubber raw material stored in a storage box to a prefabricating port from the storage box through a material clamp by a feeder, automatically cutting the strip-shaped rubber raw material by a cutting device at the prefabricating port according to the single-group rubber dosage, conveying the cut strip-shaped rubber raw material into a feeding cylinder for preheating plasticizing at 70-85 ℃, and finishing material prefabrication;
step two, rubber injection, the rubber injection is required to be subjected to die assembly operation, the die assembly adopts a full hydraulic die assembly device, an oil cylinder drives an upper die to move to realize die assembly with a lower die, oil is filled into the oil cylinder from an oil tank through a suction port when the oil cylinder acts, the oil filling is stopped when the die assembly is completed, a self-suction valve is used for cutting off the oil filling port, the pressurizing and die locking of the oil cylinder are realized, the preheated rubber in a plasticizing state is injected into the die, the die is required to be subjected to vacuumizing treatment, and the first-in first-out injection principle is determined in the rubber injection process stage so as to ensure the uniform flow of the rubber because of high viscosity and poor fluidity of the rubber and easy scorching of the high temperature;
step three, vulcanization molding, namely, after injection molding is completed, high-temperature vulcanization molding is carried out on rubber in a mold to form a rubber air bag, and in the vulcanization treatment process stage, in order to ensure the vulcanization uniformity of rubber products, rubber materials are designed to be vulcanized rapidly at high temperature, and the optimal vulcanization temperature is determined through repeated experiments;
step four, demolding of the semi-finished product, namely, because the novel rubber air bag structure is thin in wall thickness, designing a gas auxiliary molding technology, realizing demolding of the mold by using gas blowing, wherein a gas port is arranged at the bottom of the mold core, and a gas pump is externally connected with the gas port;
trimming, namely trimming the rubber air bag slitter edges to reduce the residual stress of the product and reduce the warp deformation of the product after the product is molded;
step six, secondary vulcanization, namely, the cooled rubber air bag 1 enters an oven for secondary heating vulcanization, so that the vulcanization degree of the rubber air bag 1 is improved, and the quality and the stability of products are ensured; the seamless rubber air bag 1 for the hydraulic accumulator, which is manufactured and produced by the invention, has no seam, and can avoid the problems that the traditional bonding air bag is easy to form stress concentration at the seam to cause early cracking failure of the air bag, the energy accumulator can not be recycled for a long time, the pressure pulsation is absorbed and the hydraulic impact is alleviated, the integral quality and the service life of the bladder type energy accumulator are seriously influenced, and the market demand of the high-end energy accumulator can not be met in particular.
Further preferably, the invention adopts a plasticizing injection device to realize the material storage and injection processes of the process, and the plasticizing injection device has two main functions, namely, even melting and plasticizing (extrusion) of materials and storing the materials and injecting the materials into a die (injection). The injection molding machine uses a screw-plunger type injection method, the plasticizing process adopts automatic temperature control, and a low-speed high-torque hydraulic motor is used for directly driving the screw, so that the rubber material is injected into a mold cavity at an ideal temperature, and the problems of waste products caused by vulcanization and uneven rubber material injection caused by too long residence time of the rubber material can be prevented. The main mechanical structure of the part comprises a storage box, a feeding machine, an injection press, a material clamp, a shearing device, a heating device and the like. The working principle of the device is as follows: the storage box is used for storing the strip rubber raw materials; the feeder conveys raw materials from a storage box to a prefabricating port through a material clamp, a shearing device automatically shears rubber raw materials according to the single-group rubber consumption, and material prefabrication is completed; injection is completed by a hot runner technology and a screw-plunger type injection machine; and after the injection of the sizing material is finished, performing hot vulcanization of the sizing material, and automatically opening the die after the set time is reached.
The invention adopts the mold clamping device to realize the vulcanization and demolding process of the process, and the mold clamping device has the main functions of ensuring the locking, opening and closing of a molding mold system, taking out products and ensuring the action with accurate data. It mainly comprises a fixed template, a movable template, a pull rod, an oil cylinder, a mould, an air-blowing demoulding mechanism and the like. The full-hydraulic die clamping device uniformly performs die clamping work with large-area high die clamping input pressure, the die clamping force is generated by four columns and a small number of moving parts, the die clamping time is short, and the die height is automatically adjusted. When the self-suction valve type die clamping device is used for clamping, pressure oil enters from a central tube of a plunger of the quick die-moving cylinder, the inner diameter of the quick die-moving cylinder is small, and quick die moving of the oil cylinder can be realized. At the same time, the main oil cylinder has negative pressure, and the pressure oil in the auxiliary oil tank charges oil to the main oil cylinder through the self-sucking port. When the quick oil cylinder finishes oil feeding, the movable mould plate stops moving, the mould closing is finished, the oil filling is stopped, the self-suction valve moves forward, the self-suction port channel is cut off, and the pressurizing mould locking of the oil cylinder is realized. After the injection and vulcanization process is completed, the demolding triggers blowing action through a switch, and blowing is carried out at the bottom of the mold core of the mold to expand the rubber air bag 1 so as to drive the rubber air bag 1 to be demolded outwards. The mould is specially designed according to the process of the invention, and a group of two moulds can be produced simultaneously.
Furthermore, the seamless rubber airbag 1 is redesigned and formed by observing the deformation state of the rubber airbag 1 of the bladder-type energy accumulator in the working process and analyzing and summarizing the fatigue failure characteristics of the existing rubber airbag, and the defect that the multi-section rubber airbag 1 is easy to crack due to stress concentration at the joint is fundamentally avoided. According to action tests and simulation observation, the wall thickness of the accumulator rubber air bag 1 is generally thinner, under the extrusion of hydraulic oil, the inside of the structure is unsupported, the longitudinal deformation is irregular, extreme folding conditions are easy to occur in the random deformation process, and stress concentration is easy to occur at the folding position under repeated deformation, so that the accumulator rubber air bag is damaged. Therefore, the invention uniformly arranges the integrally formed reinforcing parts inside the rubber airbag 1, so that the rubber airbag can be in a regular deformation state during operation, the condition of stress concentration caused by extreme folding is avoided, and the fatigue life of the rubber airbag 1 is prolonged. Compared with the traditional rubber air bag, the rubber air bag formed by the invention has better mechanical properties, and specifically, the rubber air bag has the following main mechanical properties:
the tensile strength is more than or equal to 15MPa, the elongation at break is 600-700%, the permanent deformation at break is less than 20%, the tearing strength is more than 45kN/m, and the fatigue life is about 50 ten thousand times. The rubber air bag formed by the conventional process cannot achieve the performance of the rubber air bag, and the mechanical properties of the conventional rubber air bag are as follows:
the tensile strength is more than or equal to 11MPa, the elongation at break is 450-540%, the permanent deformation at break is less than 35%, the tearing strength is more than 35kN/m, and the fatigue life is about 10 ten thousands times; the rubber air bag has more excellent mechanical property and longer fatigue life.
According to experimental analysis and simulation, the reinforcing part 2 is determined to be in a group of two strip-shaped opposite triangular structures, the length, the thickness of the triangular base and the number of the reinforcing part groups are determined according to the specification of the energy accumulator, and specifically, as shown in fig. 2, the reinforcing part 2 comprises a first reinforcing rib 201 and a second reinforcing rib 202 which are symmetrically arranged; the transverse section of the first reinforcing rib 201 is in a triangular structure, and the length of the side edge of the triangular structure, which is far away from one end of the second reinforcing rib 202, is longer than that of the side edge of the triangular structure, which is close to one end of the second reinforcing rib 202; the second reinforcing rib 202 has the same structure as the first reinforcing rib 201.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A seamless rubber air bag forming process is characterized in that: the method comprises the following steps:
firstly, rubber storage, namely preheating and plasticizing in a rubber storage feeding cylinder;
injecting rubber into a mould, wherein the rubber is preheated to be in a plasticizing state, and the mould is required to be vacuumized;
step three, vulcanization molding, namely, after injection molding is completed, vulcanizing and molding the rubber in a mold at a high temperature to form a rubber air bag;
step four, demoulding the semi-finished product, namely injecting air from one end of the mould core to drive the formed rubber air bag to perform air blowing demoulding;
trimming, namely trimming the waste edges of the rubber air bags;
and step six, secondary vulcanization, namely, feeding the cooled rubber air bags into an oven for secondary heating vulcanization, so that the vulcanization degree of the rubber air bags is improved, and the quality and the stability of products are ensured.
2. The seamless rubber airbag molding process according to claim 1, wherein: the first step comprises the steps of conveying the strip-shaped rubber raw materials stored in the storage box to a prefabricating opening through a material clamp by a feeder, automatically cutting the strip-shaped rubber raw materials by a cutting device at the prefabricating opening according to the single-group rubber dosage, conveying the cut strip-shaped rubber raw materials into a feeding cylinder for preheating plasticizing at 70-85 ℃, and prefabricating the materials.
3. The seamless rubber airbag molding process according to claim 1, wherein: the rubber injection is preceded by mould closing operation, the mould closing adopts a full-hydraulic mould closing device, the oil cylinder drives the upper mould to move to realize mould closing with the lower mould, oil is filled into the oil cylinder from the oil tank through the suction port when the oil cylinder acts, and when the mould closing is completed, the oil filling is stopped, and the self-suction port is cut off by the self-suction valve to realize the pressurizing mould locking of the oil cylinder.
4. A process for forming a seamless rubber airbag according to claim 3, wherein: the bottom of the mold core is provided with an air port, the air port is externally connected with an air pump, when the semi-finished product is demolded, the oil cylinder acts reversely, the upper mold is opened, the air pump blows air into the rubber air bag from the air port, so that the rubber air bag is expanded, and the rubber air bag is driven to demold outwards.
5. The seamless rubber airbag molding process according to claim 1, wherein: a plurality of reinforcing parts are uniformly arranged on the inner wall of the rubber air bag, and the reinforcing parts and the rubber air bag are integrally formed.
6. The seamless rubber airbag molding process according to claim 5, wherein: the reinforcing part comprises a first reinforcing rib and a second reinforcing rib which are symmetrically arranged; the transverse section of the first reinforcing rib is of a triangular structure, and the length of the side edge of the triangular structure, which is far away from one end of the second reinforcing rib, is longer than that of the side edge of the triangular structure, which is close to one end of the second reinforcing rib; the second reinforcing rib structure is the same as the first reinforcing rib structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310728049.8A CN116461041A (en) | 2023-06-20 | 2023-06-20 | Seamless rubber air bag forming process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310728049.8A CN116461041A (en) | 2023-06-20 | 2023-06-20 | Seamless rubber air bag forming process |
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| Publication Number | Publication Date |
|---|---|
| CN116461041A true CN116461041A (en) | 2023-07-21 |
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| CN202310728049.8A Pending CN116461041A (en) | 2023-06-20 | 2023-06-20 | Seamless rubber air bag forming process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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