CN116714174A - Automatic vulcanization injection system for rubber products - Google Patents
Automatic vulcanization injection system for rubber products Download PDFInfo
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- CN116714174A CN116714174A CN202310997029.0A CN202310997029A CN116714174A CN 116714174 A CN116714174 A CN 116714174A CN 202310997029 A CN202310997029 A CN 202310997029A CN 116714174 A CN116714174 A CN 116714174A
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- 239000007924 injection Substances 0.000 title claims abstract description 186
- 238000002347 injection Methods 0.000 title claims abstract description 186
- 238000004073 vulcanization Methods 0.000 title claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 213
- 239000004636 vulcanized rubber Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims description 71
- 238000003860 storage Methods 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 12
- 238000001746 injection moulding Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims 2
- 238000000034 method Methods 0.000 description 33
- 230000008569 process Effects 0.000 description 29
- 239000002994 raw material Substances 0.000 description 14
- 238000012545 processing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000012899 standard injection Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of rubber injection, in particular to an automatic vulcanization injection system for rubber products, which comprises the following components: the device comprises a pre-plasticizing module, a middle plasticizing module, a plurality of injection modules, a detection module, a vulcanization mold module and an injection control module; the device comprises a pre-plasticizing module, a middle plasticizing module, a plurality of injection modules, a detection module and a vulcanization module, wherein the pre-plasticizing module is used for plasticizing rubber materials to form pre-mixed materials, the middle plasticizing module is used for further plasticizing the pre-mixed materials to form the pre-plasticizing materials, the injection modules are used for heating the pre-plasticizing materials to obtain plasticizing materials and injecting the plasticizing materials into the vulcanization mould, the detection module is used for detecting various data in plasticizing and injection vulcanization processes, the vulcanization mould module is used for providing vulcanization places and transmitting vulcanized rubber pieces, and the injection control module is used for adjusting the working mode of the injection module according to detection results.
Description
Technical Field
The invention relates to the technical field of rubber injection, in particular to an automatic vulcanization injection system for rubber products.
Background
Injection molding of injection molded rubber is a production method in which the kneaded slurry is directly injected from a cylinder into a mold through a charging device for vulcanization, similar to plastic injection molding. Injection molding is adopted, the molding cycle is short, the production efficiency is high, the labor intensity is low, and the product quality is high, so in recent years, the injection molding technology is more and more concerned, and the technology is rapidly developed in the production of rubber products.
Chinese patent publication No.: CN113059750a discloses an injection vulcanization molding system of a rubber shaft sleeve assembly and a use method, comprising a conveying mechanism for conveying a shaft sleeve; the placing mechanism is used for placing and loading the shaft sleeve conveyed by the conveying mechanism, the rubber shaft sleeve assembly material taking mechanism comprises a three-shaft moving frame and a manipulator assembly arranged at the output end of the three-shaft moving frame, the manipulator assembly is relatively perpendicular to the output end and can circumferentially rotate, and the manipulator assembly comprises a frame body, and a first grabbing tool and a second grabbing tool which are respectively arranged at two ends of the frame body; the framework arranging disc is transported to the material taking mechanism of the rubber shaft sleeve assembly through the delivery mechanism; an injection vulcanizer for injection vulcanizing the rubber sleeve assembly; forming a production line of the high-efficiency rubber shaft sleeve assembly from the steps of material arrangement, material delivery, material taking, material discharging, injection vulcanization molding and finished product taking, and improving the production efficiency; it follows that the rubber bushing assembly injection vulcanization molding system and method of use have the following problems: the requirement on injection power is high when a large mold is injected, so that the pressure is high in the pressurizing and plasticizing process of the screw, and the raw materials are vulcanized in advance before entering the vulcanization process.
Disclosure of Invention
Therefore, the invention provides an automatic vulcanization injection system for rubber products, which is used for solving the problem that in the prior art, a large-sized die adopts an injection mode to perform injection, the requirement on injection power is high, and the screw rod is vulcanized in advance in the pressurizing plasticizing process.
To achieve the above object, the present invention provides an automated vulcanization injection system for rubber products, comprising:
the pre-plasticizing module is used for plasticizing the rubber material through screw movement to form a pre-mixed material;
the middle plasticizing module is connected with the pre-plasticizing module and used for storing the pre-mixed material and vibrating the pre-mixed material to improve plasticizing degree so as to form the pre-plasticizing material;
the injection modules are respectively connected with the pre-plasticizing material discharging holes of the middle plasticizing modules and are used for heating and plasticizing the pre-plasticizing material through a screw mechanism of a screw plunger integrated structure to form plasticizing material, and injecting the plasticizing material into a die cavity of a vulcanization die through a plunger structure of the screw plunger integrated structure;
the detection module is respectively connected with the pre-plasticizing module, the intermediate plasticizing module and the injection modules and is used for detecting the temperature of the pre-mixed material at each position of the screw, the viscosity of the output pre-mixed material, the viscosity of the pre-plasticized material, the output temperature, the temperature of the plasticized material at each position of the screw and the injection speed of the plasticized material at the outlet of the screw;
the vulcanization mold module is connected with the injection module and comprises a fixed mold unit and a plurality of movable mold units, and is used for forming a mold cavity of the vulcanization mold through positioning and matching the fixed mold unit and the single movable mold unit and fixedly connecting the fixed mold unit and the single movable mold unit under a first working condition, and transmitting vulcanized rubber parts in the single movable mold unit and the movable mold cavity through releasing the connection relation between the fixed mold unit and the single movable mold unit under a second working condition;
and the injection control module is respectively connected with the pre-plasticizing module, the intermediate plasticizing module, the injection module, the vulcanization mold module and the detection module and is used for adjusting the working mode of the injection module according to the detection result of the detection module and the vulcanization effect of the vulcanized rubber piece.
The first working condition is that the fixed die unit and the single movable die unit complete injection molding preparation; and the second working condition is that the plasticizing material in the die cavity is vulcanized and formed, and the injection preparation comprises that the die temperature of each die unit reaches a preset temperature.
Further, the pre-plasticizing module includes:
a feed port for inputting the rubber material to a first screw mechanism;
the first screw mechanism is connected with the feed inlet and comprises a first screw structure and a first charging barrel, and is used for plasticizing the rubber material to obtain the ready-mixed material and pushing the ready-mixed material to the discharge outlet;
the first power assembly is connected with the first screw mechanism and is used for providing power for the first screw mechanism;
and the premixed material discharging port is connected with the pushing direction of the first screw mechanism and is used for inputting the premixed material into the middle plasticizing module.
Further, the intermediate plasticizing module includes:
the storage cavity is connected with the pre-mixed material outlet and used for bearing the pre-mixed material and mixing the pre-mixed material by stirring;
the vibration mechanism is connected with the storage cavity and used for vibrating the ready-mixed material according to preset frequency so as to improve the plasticizing degree of the ready-mixed material;
the pre-plasticizing material discharging hole is connected with one side, far away from the pre-mixing material discharging hole, of the material storage cavity and is used for conveying the pre-plasticizing material to the injection module.
Further, a single injection module comprises:
the second screw mechanism is connected with the pre-plasticizing material discharging hole, comprises a second screw structure and a second charging barrel, and is used for carrying out spiral pushing on the pre-plasticizing material to heat the pre-plasticizing material into the plasticizing material and injecting the plasticizing material into an injection material cavity of the plunger structure;
the plunger mechanism is connected with the second screw mechanism and comprises a plunger structure, and is used for applying pushing force to the second screw mechanism to push the plasticizing material to a die cavity of the vulcanization die;
and the second power assembly is used for providing power for the second screw mechanism and the plunger mechanism so that the plunger mechanism can inject the plasticizing material into the vulcanization mold cavity at a set speed.
Further, the stationary mold unit includes:
the fixed die is an upper die of the vulcanizing die;
the fixed die heating assembly is arranged on one side of the fixed die far away from the die cavity and is used for heating the die to preheat the die and enabling the rubber piece to be vulcanized by heating to obtain a vulcanized rubber piece;
and the fixed mold injection ports are arranged on the fixed mold and penetrate through the inner wall of the mold cavity of the fixed mold, and the single fixed mold injection port is connected with the corresponding single injection module and is used for injecting plasticizing materials into the mold cavity of the vulcanization mold formed by the fixed mold and the movable mold unit.
Further, the movable mold unit includes:
the fixed die comprises a plurality of fixed die cavities, a plurality of movable dies and a plurality of movable dies, wherein the movable dies are arranged below the fixed die cavities and are lower die dies of a vulcanizing die;
the movable die heating assembly is arranged on one side of the movable die far away from the die cavity and is used for heating the die to preheat the die and enabling the rubber piece to be vulcanized by heating to obtain a vulcanized rubber piece;
and the collecting assembly is connected with the single movable die and is used for collecting vulcanized rubber parts on the movable die.
Further, the injection control module is provided with a first working mode and a second working mode;
in the first working mode, the injection control module controls the material storage cavity of the intermediate plasticizing module to start a stirring function and controls the vibration mechanism not to start a vibration function;
in the second working mode, the injection control module controls; the material storage cavity of the intermediate plasticizing module starts a stirring function, controls the vibrating mechanism to start a vibrating function, and determines the vibrating frequency and the vibrating duration of the vibrating mechanism according to the viscosity of the ready-mixed material;
the first working mode meets the condition that the viscosity of the pre-plasticizing material is smaller than the preset viscosity; the second working mode meets the condition that the viscosity of the pre-plasticizing material is larger than or equal to the preset viscosity.
Further, the injection control module determines the frequency and the vibration time of vibration according to the difference between the viscosity of the pre-plasticizing material and the preset viscosity in the second working mode.
Further, the injection control module determines the injection speed of the injection module according to the viscosity of the pre-mixed material detected by the detection module or the viscosity of the pre-plasticized material after vibration.
Further, the injection control module adjusts the injection speed of the injection module according to the injection temperature of the pre-plasticizing material detected by the detection module.
Compared with the prior art, the system has the beneficial effects that the two plasticizing modules are arranged, so that the plasticizing requirements on rubber materials can be met, the rubber is subjected to injection molding in an injection mode, the dimensional accuracy and the qualification rate of products can be improved, burrs are reduced, and the rubber material is saved; and the injection speed can be adjusted, so that the problem of advanced vulcanization in the injection and pressurization process is avoided, the quality of vulcanized rubber parts is improved, and the preparation range is increased.
Furthermore, in the system, the pre-plasticizing module and the intermediate plasticizing module are arranged to plasticize the rubber material twice, and the raw materials are injected into the vulcanization mold simultaneously by adopting a plurality of injection modules, so that the requirement of a single injection module on power is reduced, the raw materials are prevented from being plasticized in advance, the corresponding plasticizing process can be provided according to the viscosity requirement on vulcanized rubber parts under different plasticizing conditions, and the plasticizing degree of the rubber material is ensured while the plasticizing process is ensured.
Furthermore, in the system, the one-step rubber injection process is divided into two stages, so that for large rubber parts, the injection of raw materials can be well ensured to be synchronously carried out, the difference of the vulcanization process due to the injection time is avoided, and meanwhile, the uniformity of each component of the raw materials of the large rubber parts can be improved due to the fact that the raw materials are fully mixed before final injection; and moreover, the plunger structure and the power assembly are arranged in the injection module to control the injection speed, so that the problem that the plasticizing material is vulcanized in advance to influence the subsequent processing process due to the fact that the pressure is too high is avoided, and the quality of vulcanized rubber parts is guaranteed.
Furthermore, in the system, the vulcanizing mold module is divided into the fixed mold unit and the plurality of movable mold units, the demolding time of the rubber piece after mold opening is reduced by the detachable mold, and the interval time of the injection system is shortened by pre-heating in advance due to the fact that the lower mold is replaceable, so that the vulcanizing process of raw materials in the injection waiting process in the injection module is reduced.
Furthermore, in the system, the injection control module plasticizes the rubber material according to the viscosity requirement of the plasticization material by using different working modes, so that various preparation requirements can be met, unnecessary processing procedures are reduced, and the preparation efficiency is improved.
Further, in the system, the injection control module determines the vibration frequency and the vibration time according to the difference between the viscosity of the pre-plasticizing material and the preset viscosity, so that the viscosity of the pre-plasticizing material can be accurately controlled, the injection speed in the subsequent injection process is ensured, the problem that the vulcanized rubber part prepared subsequently is insufficient in plasticity or excessively high in shaping is avoided, and the quality of the vulcanized rubber part is improved.
Further, in the system, the injection control module determines and adjusts the injection speed of the injection module according to the viscosity of the pre-mixed material, the viscosity of the pre-plasticized material and the injection temperature of the pre-plasticized material, so that the advanced vulcanization process of the plasticized material is avoided or at least partially reduced, and the vulcanization effect is prevented from being influenced by advanced vulcanization or insufficient heating in the injection process.
Drawings
FIG. 1 is a schematic illustration of the connection of an automated vulcanization injection system for rubber products in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of the injection section of an automated vulcanization injection system for rubber products according to an embodiment of the present invention;
FIG. 3 is a schematic view of a vulcanization mold module of an automated vulcanization injection system for rubber products according to an embodiment of the present invention;
FIG. 4 is a process flow diagram of an automated vulcanization injection system for rubber products in accordance with an embodiment of the present invention.
In the figure: 1, a feed inlet; 2, a first power assembly; 3, a first screw mechanism; 4, a pre-mixed material discharge port; 5, a vibration mechanism; 6, a storage cavity; 7, a pre-plasticizing material discharging hole; 8, a single injection module; 81, a second power assembly; 82, plunger structure; 83, a second screw mechanism; 9, fixing the die; 10, fixing the die heating assembly; 11, a plurality of movable molds; 12, a movable mold heating assembly; 13, collecting the assembly.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
FIG. 1 is a schematic diagram showing the connection of an automated vulcanization injection system for rubber products according to the present invention; the present invention provides an automated vulcanization injection system for rubber articles, comprising:
the pre-plasticizing module is used for plasticizing the rubber material through screw movement to form a pre-mixed material;
the middle plasticizing module is connected with the pre-plasticizing module and used for storing the pre-mixed material and vibrating the pre-mixed material to improve plasticizing degree so as to form the pre-plasticizing material;
the injection modules are respectively connected with the pre-plasticizing material discharging holes of the middle plasticizing modules and are used for heating and plasticizing the pre-plasticizing material through a screw mechanism of a screw plunger integrated structure to form plasticizing material, and injecting the plasticizing material into a die cavity of a vulcanization die through a plunger structure of the screw plunger integrated structure;
the detection module is respectively connected with the pre-plasticizing module, the intermediate plasticizing module and the injection modules and is used for detecting the temperature of the pre-mixed material at each position of the screw, the viscosity of the output pre-mixed material, the viscosity of the pre-plasticized material, the output temperature, the temperature of the plasticized material at each position of the screw and the injection speed of the plasticized material at the outlet of the screw;
the vulcanization mold module is connected with the injection module and comprises a fixed mold unit and a plurality of movable mold units, and is used for forming a mold cavity of the vulcanization mold through positioning and matching the fixed mold unit and the single movable mold unit and fixedly connecting the fixed mold unit and the single movable mold unit under a first working condition, and transmitting vulcanized rubber parts in the single movable mold unit and the movable mold cavity through releasing the connection relation between the fixed mold unit and the single movable mold unit under a second working condition;
and the injection control module is respectively connected with the pre-plasticizing module, the intermediate plasticizing module, the injection module, the vulcanization mold module and the detection module and is used for adjusting the working mode of the injection module according to the detection result of the detection module and the vulcanization effect of the vulcanized rubber piece.
The first working condition is that the fixed die unit and the single movable die unit complete injection molding preparation; and the second working condition is that the plasticizing material in the die cavity is vulcanized and formed, and the injection preparation comprises that the die temperature of each die unit reaches a preset temperature.
The system is provided with two plasticizing modules, so that the plasticizing requirements of various rubber materials can be met, the rubber is subjected to injection molding in an injection mode, the dimensional accuracy and the qualification rate of products can be improved, burrs are reduced, and the rubber material is saved; and the injection speed can be adjusted, so that the problem of advanced vulcanization in the injection and pressurization process is avoided, the quality of vulcanized rubber parts is improved, and the preparation range is increased.
Referring now to FIG. 2, there is shown a block diagram of an injection portion of an automated vulcanization injection system for rubber products in accordance with the present invention;
specifically, the pre-plasticizing module includes:
a feed port 1 for inputting the rubber material to a first screw mechanism 3;
the first screw mechanism 3 is connected with the feed inlet, comprises a first screw structure and a first charging barrel, and is used for plasticizing the rubber material to obtain the ready-mixed material and pushing the ready-mixed material to the discharge outlet;
a first power assembly 2 connected to the first screw mechanism for powering the first screw mechanism;
and the pre-mixed material discharging port 4 is connected with the pushing direction of the first screw mechanism and is used for inputting the pre-mixed material into the intermediate plasticizing module.
Specifically, the intermediate plasticizing module includes:
the storage cavity 6 is connected with the pre-mixed material outlet and used for bearing the pre-mixed material and mixing the pre-mixed material by stirring;
the vibration mechanism 5 is connected with the storage cavity and used for vibrating the ready-mixed material according to preset frequency so as to improve the plasticizing degree of the ready-mixed material;
and the pre-plasticizing material discharging port 7 is connected with one side of the material storage cavity away from the pre-mixing material discharging port and is used for conveying the pre-plasticizing material to the injection module.
It will be appreciated that the screw mechanism in the rubber injection molding process is generally used for stirring and shearing the rubber material in the material cylinder, and in the specific implementation process of the invention, the process of plasticizing the rubber material by the pre-plasticizing module to obtain the pre-mixed material is to stir and primarily shear the pre-mixed material by the first screw mechanism so as to achieve the effects of mixing and primarily plasticizing, and as for the implementation manner of the first screw mechanism, the implementation manner of the first screw mechanism can be implemented in the same manner as the screw mechanism of the screw reciprocating injection molding machine in the prior art, and is not limited herein.
In the process of vibrating the pre-mixed material to improve the plasticizing degree by the vibrating mechanism, the vibrating mode can be that the vibrating mechanism drives the material storage cavity to vibrate at a preset frequency or the vibrating mechanism drives the sizing material of the material storage cavity to generate periodical pressure and/or shearing force by electromagnetic, sonic, microwave, airflow and other vibrating sources, so that the internal stress of the pre-mixed material is reduced by vibrating, and the viscosity of the pre-mixed material is adjusted to achieve the effect of improving the plasticizing degree;
the vibration mechanism can reduce the viscosity of the ready-mixed material, improve the fluidity of the ready-mixed material, be beneficial to the processing of high-viscosity polymer, reduce the viscosity of the ready-mixed material, reduce the processing temperature or pressure, reduce the cooling time and accelerate the molding cycle; the coagulation state structure of the rubber product can be controlled by vibration, and the crystallization and orientation of the high polymer are controlled, so that various properties of the product including physical and mechanical properties, optical properties, thermal properties and the like are controlled and improved.
In the system, the pre-plasticizing module and the middle plasticizing module are arranged to plasticize the rubber material twice, and the raw materials are injected into the vulcanization mold simultaneously by adopting a plurality of injection modules, so that the power requirement of a single injection module is reduced, the raw materials are prevented from plasticizing in advance, the corresponding plasticizing process can be provided according to the viscosity requirement of vulcanized rubber parts under different plasticizing conditions, and the plasticizing degree of the rubber material is ensured while the plasticizing process is ensured.
With continued reference to fig. 2, in particular, the single injection module 8 comprises:
the second screw mechanism 83 is connected with the pre-plasticizing material discharging hole, and comprises a second screw structure and a second charging barrel, and is used for carrying out spiral pushing on the pre-plasticizing material to heat the pre-plasticizing material into the plasticizing material and injecting the plasticizing material into an injection material cavity of the plunger structure;
a plunger mechanism 82 coupled to the second screw mechanism and comprising a plunger structure for applying a pushing force to the second screw mechanism to push the plasticized material toward the cavity of the vulcanization mold;
a second power assembly 81 for powering the second screw mechanism and the plunger mechanism to cause the plunger mechanism to inject the plasticizing material into the vulcanization mold cavity at a set speed.
It can be understood that the second screw rod mechanism, the plunger mechanism and the power assembly of each injection module work synchronously, so that the rubber vulcanization degree of different positions of the vulcanized rubber piece is avoided.
In the system, the one-step rubber injection process is divided into two stages, so that for large rubber parts, the injection of raw materials can be well ensured to be carried out synchronously, the difference of the vulcanization process due to the injection time is avoided, and meanwhile, the uniformity of each component of the raw materials of the large rubber parts can be improved due to the fact that the raw materials are fully mixed before final injection; and moreover, the plunger structure and the power assembly are arranged in the injection module to control the injection speed, so that the problem that the plasticizing material is vulcanized in advance to influence the subsequent processing process due to the fact that the pressure is too high is avoided, and the quality of vulcanized rubber parts is guaranteed.
Referring to FIG. 3, a schematic view of a curing mold module of an automated curing injection system for rubber products according to the present invention is shown; specifically, the stationary mold unit includes:
a fixed die 9 which is an upper die of the vulcanizing die;
a stationary mold heating assembly 10 provided at a side of the stationary mold away from the cavity of the mold, for heating the mold to preheat the mold and for vulcanizing the rubber member by heating to obtain a vulcanized rubber member;
and the fixed mold injection ports are arranged on the fixed mold and penetrate through the inner wall of the mold cavity of the fixed mold, and the single fixed mold injection port is connected with the corresponding single injection module and is used for injecting plasticizing materials into the mold cavity of the vulcanization mold formed by the fixed mold and the movable mold unit.
Specifically, the movable mold unit includes:
the movable molds 11 are arranged below the fixed mold cavity and are lower mold molds of the vulcanizing mold, and a single movable mold and the fixed mold form the vulcanizing mold to be used as a mold cavity for loading plasticizing materials, and the plasticizing materials are vulcanized and molded through the vulcanizing mold;
a movable mold heating unit 12 provided on a side of the movable mold away from the cavity for heating the mold to preheat the mold and to vulcanize the rubber by heating to obtain a vulcanized rubber;
and a collecting assembly 13 connected with the single movable mold for collecting the vulcanized rubber on the movable mold.
In the concrete implementation process, the fixed die and the movable die are the same in shape, the size is slightly larger than that of the movable die, the movable die can be completely contained, and the two dies are not connected too tightly when connected to cause the demolding difficulty of the vulcanized rubber piece, it can be understood that gaps between the dies can not cause overflow to cause irregular shapes when the molded vulcanized rubber piece is formed, and each movable die can move, for example, each movable die is ordered along a set route and moves through a positioning conveyor belt to enable the fixed die to be matched and positioned with the movable die, or each movable die is mounted on a positioning turntable to enable the fixed die to be matched and positioned with the movable die through rotation.
It can be understood that the connection mode and the positioning mode of the movable mold and the fixed mold are not particularly limited in the invention, and any one of the prior art can be adopted according to the specific rubber part requirements, so long as the function of the vulcanizing mold can be realized and the upper mold and the lower mold can be completely separated, and the description is omitted herein.
In the system, the vulcanizing mold module is divided into the fixed mold unit and the plurality of movable mold units, the detachable mold reduces the demolding time of the rubber piece after mold opening, and the interval time of the injection system is reduced by pre-heating in advance because the lower mold is replaceable, so that the vulcanizing process of raw materials in the injection waiting process in the injection module is reduced.
Referring now to FIG. 4, a process flow diagram of an automated vulcanization injection system for rubber products in accordance with the present invention is shown;
specifically, the injection control module is provided with a first working mode and a second working mode;
in the first working mode, the injection control module controls the material storage cavity of the intermediate plasticizing module to start a stirring function and controls the vibration mechanism not to start a vibration function;
in the second working mode, the injection control module controls the material storage cavity of the intermediate plasticizing module to start a stirring function, controls the vibration mechanism to start a vibration function, and determines the vibration frequency and the vibration duration of the vibration mechanism according to the viscosity of the pre-mixed material;
the first working mode meets the condition that the viscosity of the pre-plasticizing material is smaller than the preset viscosity; the second working mode meets the condition that the viscosity of the pre-plasticizing material is larger than or equal to the preset viscosity.
The calculation formula of the preset viscosity is as follows:
r is a preset viscosity, m i For the measured feeding amount of the ith second screw mechanism in unit time, n is the measurement times, v is the set standard injection speed, ρ is the density of the uniform mixed state of the plasticized material raw materials, and a is the friction coefficient of the inner wall of the storage cavity. It should be noted that, the standard injection speed is the ideal injection speed corresponding to the corresponding rubber piece injected by the single injection module in the system, and the ideal injection speed can be selected after the rubber piece meeting the requirement is obtained through limited tests for verification.
In the system, the injection control module plasticizes the rubber material according to the viscosity requirement of the plasticization material by using different working modes, so that various preparation requirements can be met, unnecessary processing procedures are reduced, and the preparation efficiency is improved.
Specifically, the injection control module determines the frequency and the vibration time of vibration according to the difference value between the viscosity of the pre-plasticizing material and the preset viscosity in the second working mode;
for example: under the condition of a first viscosity difference value, the viscosity adjustment quantity of the pre-plasticizing material is small, and a first vibration frequency and a first vibration time are used;
under the condition of a second viscosity difference value, the viscosity adjustment quantity of the pre-plasticizing material is large, and a second vibration frequency and a second vibration time are used;
the viscosity of the pre-plasticizing material is r1, the preset viscosity is r, the first viscosity difference condition is that the difference delta r between the viscosity of the pre-plasticizing material and the preset viscosity is smaller than 0.2 times of the preset viscosity, namely delta r is smaller than 0.2r, wherein delta r=r1-r; the second viscosity difference condition is preset viscosity that the difference delta r between the viscosity r1 of the pre-plasticizing material and the preset viscosity r is more than or equal to 0.2 times, namely delta r is more than or equal to 0.2r;
the first vibration frequency is p1, the second vibration frequency is p2, the first vibration time is t1, the second vibration time is t2, the first vibration frequency is smaller than the second vibration frequency p1 and smaller than p2, and the first vibration time is smaller than the second vibration time t1 and smaller than t2.
In the system, the injection control module determines the vibration frequency and the vibration time according to the difference between the viscosity of the pre-plasticizing material and the preset viscosity, so that the viscosity of the pre-plasticizing material can be accurately controlled, the injection speed in the subsequent injection process is ensured, the problem that the vulcanized rubber part prepared subsequently is insufficient in plasticity or excessively high in shaping is avoided, and the quality of the vulcanized rubber part is improved.
Specifically, the injection control module determines the injection speed of the injection module according to the viscosity of the pre-mixed material detected by the detection module or the viscosity of the pre-plasticized material after vibration;
in the specific implementation process, the maximum value of the injection speed is the maximum speed at which the rubber is not vulcanized in advance in the injection process;
when the viscosity of the pre-mixed material or the viscosity of the pre-plasticized material after vibration is larger than the preset viscosity, the first injection speed is used; when the viscosity of the pre-mixed material or the viscosity of the pre-plasticized material after vibration is smaller than the preset viscosity, the second injection speed is used;
the first injection speed is 1.2 times of preset speed, the second injection speed is 0.8 times of preset speed, and the preset speed is the injection speed when the viscosity of the pre-plasticizing material is the preset viscosity, namely the standard injection speed.
Specifically, the injection control module adjusts the injection speed of the injection module according to the output temperature of the pre-plasticizing material detected by the detection module.
The output temperature of the pre-plasticizing material refers to the temperature of the pre-plasticizing material output in the storage cavity.
In the specific implementation process, the injection speed is adjusted by the following steps: the injection speed is adjusted according to the proportional relation between the injection speed and the output temperature, namely, the higher the injection temperature of the pre-plasticizing material is, the faster the injection speed of the injection module can be, but the injection speed is not higher than the maximum value of the injection speed.
In the system, the injection control module determines and adjusts the injection speed of the injection module according to the viscosity of the ready-mixed material, the viscosity of the ready-plasticized material and the injection temperature of the ready-plasticized material, so that the advanced vulcanization process of the plasticized material is avoided or at least partially reduced, and the vulcanization effect is prevented from being influenced by advanced vulcanization or insufficient heating in the injection process.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automated vulcanization injection system for rubber products, comprising:
the pre-plasticizing module is used for plasticizing the rubber material through screw movement to form a pre-mixed material;
the middle plasticizing module is connected with the pre-plasticizing module and used for storing the pre-mixed material and vibrating the pre-mixed material to improve plasticizing degree so as to form the pre-plasticizing material;
the injection modules are respectively connected with the pre-plasticizing material discharging holes of the middle plasticizing modules and are used for heating and plasticizing the pre-plasticizing material through a screw structure of a screw plunger integrated structure to form plasticizing material and injecting the plasticizing material into a die cavity of the vulcanization die through a plunger structure of the screw plunger integrated structure;
the detection module is respectively connected with the pre-plasticizing module, the intermediate plasticizing module and the injection modules and is used for detecting the temperature of the pre-mixed material at each position of the screw, the viscosity of the output pre-mixed material, the viscosity of the pre-plasticized material, the output temperature, the temperature of the plasticized material at each position of the screw and the injection speed of the plasticized material at the outlet of the screw;
the vulcanization mold module is connected with the injection module and comprises a fixed mold unit and a plurality of movable mold units, and is used for forming a mold cavity of the vulcanization mold through positioning and matching the fixed mold unit and the single movable mold unit and fixedly connecting the fixed mold unit and the single movable mold unit under a first working condition, and transmitting vulcanized rubber parts in the single movable mold unit and the movable mold cavity through releasing the connection relation between the fixed mold unit and the single movable mold unit under a second working condition;
the injection control module is respectively connected with the pre-plasticizing module, the intermediate plasticizing module, the injection module, the vulcanization mould module and the detection module and is used for adjusting the working mode of the injection module according to the detection result of the detection module and the vulcanization effect of the vulcanized rubber piece;
the first working condition is that the fixed die unit and the single movable die unit complete injection molding preparation; and the second working condition is that the plasticizing material in the die cavity is vulcanized and formed, and the injection preparation comprises that the die temperature of each die unit reaches a preset temperature.
2. The automated vulcanization injection system for rubber products of claim 1, wherein the pre-plasticizing module comprises:
a feed port for inputting the rubber material to a first screw mechanism;
the first screw mechanism is connected with the feed inlet and comprises a first screw structure and a first charging barrel, and is used for plasticizing the rubber material to obtain the ready-mixed material and pushing the ready-mixed material to the discharge outlet;
the first power assembly is connected with the first screw mechanism and is used for providing power for the first screw mechanism;
and the pre-mixed material discharging port is connected with the pushing direction of the first screw mechanism and is used for inputting the pre-mixed material into the middle plasticizing module.
3. The automated vulcanization injection system for rubber products of claim 2, wherein the intermediate plasticizing module comprises:
the storage cavity is connected with the pre-mixed material outlet and used for bearing the pre-mixed material and mixing the pre-mixed material by stirring;
the vibration mechanism is connected with the storage cavity and used for vibrating the ready-mixed material according to preset frequency so as to improve the plasticizing degree of the ready-mixed material;
the pre-plasticizing material discharging hole is connected with one side, far away from the pre-mixing material discharging hole, of the material storage cavity and is used for conveying the pre-plasticizing material to the injection module.
4. An automated vulcanization injection system for rubber products as set forth in claim 3, wherein a single of said injection modules comprises:
the second screw mechanism is connected with the pre-plasticizing material discharging hole, comprises a second screw structure and a second charging barrel, and is used for carrying out spiral pushing on the pre-plasticizing material to heat the pre-plasticizing material into the plasticizing material and injecting the plasticizing material into an injection material cavity of the plunger structure;
the plunger mechanism is connected with the second screw mechanism and comprises a plunger structure, and is used for applying pushing force to the second screw mechanism to push the plasticizing material to a die cavity of the vulcanization die;
and the second power assembly is used for providing power for the second screw mechanism and the plunger mechanism so that the plunger mechanism can inject the plasticizing material into the vulcanization mold cavity at a set speed.
5. The automated vulcanization injection system for rubber products as set forth in claim 4, wherein said stationary mold unit includes:
the fixed die is an upper die of the vulcanizing die;
the fixed die heating assembly is arranged on one side of the fixed die far away from the die cavity and is used for heating the die to preheat the die and enabling the rubber piece to be vulcanized by heating to obtain a vulcanized rubber piece;
and the fixed mold injection ports are arranged on the fixed mold and penetrate through the inner wall of the mold cavity of the fixed mold, and the single fixed mold injection port is connected with the corresponding single injection module and is used for injecting plasticizing materials into the mold cavity of the vulcanization mold formed by the fixed mold and the movable mold unit.
6. The automated vulcanization injection system for rubber products as described in claim 4, wherein said movable mold unit includes:
the fixed die comprises a plurality of fixed die cavities, a plurality of movable dies and a plurality of movable dies, wherein the movable dies are arranged below the fixed die cavities and are lower die dies of a vulcanizing die;
the movable die heating assembly is arranged on one side of the movable die far away from the die cavity and is used for heating the die to preheat the die and enabling the rubber piece to be vulcanized by heating to obtain a vulcanized rubber piece;
and the collecting assembly is connected with the single movable die and is used for collecting vulcanized rubber parts on the movable die.
7. The automated vulcanization injection system for rubber products of claim 6, wherein the injection control module is provided with a first mode of operation and a second mode of operation;
in the first working mode, the injection control module controls the material storage cavity of the intermediate plasticizing module to start a stirring function and controls the vibration mechanism not to start a vibration function;
in the second working mode, the injection control module controls; the material storage cavity of the intermediate plasticizing module starts a stirring function, controls the vibrating mechanism to start a vibrating function, and determines the vibrating frequency and the vibrating duration of the vibrating mechanism according to the viscosity of the ready-mixed material;
the first working mode meets the condition that the viscosity of the pre-plasticizing material is smaller than the preset viscosity; the second working mode meets the condition that the viscosity of the pre-plasticizing material is larger than or equal to the preset viscosity.
8. The automated vulcanization injection system for rubber products of claim 7, wherein the injection control module determines the frequency and time of vibration in the second mode of operation based on a difference between the viscosity of the pre-plasticizing material and a pre-set viscosity.
9. The automated vulcanization injection system for rubber products of claim 8, wherein the injection control module determines the injection speed of the injection module based on the viscosity of the ready mix detected by the detection module or the viscosity of the pre-plasticized mix after vibration.
10. The automated vulcanization injection system for rubber products of claim 9, wherein the injection control module adjusts the injection speed of the injection module based on the injection temperature of the pre-plasticizing material detected by the detection module.
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| CN202310997029.0A CN116714174A (en) | 2023-08-09 | 2023-08-09 | Automatic vulcanization injection system for rubber products |
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| CN202310997029.0A CN116714174A (en) | 2023-08-09 | 2023-08-09 | Automatic vulcanization injection system for rubber products |
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| CN115972478A (en) * | 2022-12-19 | 2023-04-18 | 四川大学 | Polymer melt composite vibration injection molding device |
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| EP1090734A1 (en) * | 1999-10-06 | 2001-04-11 | Battenfeld GmbH | Method and apparatus for injection moulding of plastic parts |
| CN103121258A (en) * | 2011-11-18 | 2013-05-29 | 富士施乐株式会社 | Purification method of preplasticizing injection molding machine and method of manufacturing rubber product |
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