CN108000823B - Chemical micro-foaming injection molding equipment and chemical micro-foaming injection molding process - Google Patents
Chemical micro-foaming injection molding equipment and chemical micro-foaming injection molding process Download PDFInfo
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- CN108000823B CN108000823B CN201711457658.5A CN201711457658A CN108000823B CN 108000823 B CN108000823 B CN 108000823B CN 201711457658 A CN201711457658 A CN 201711457658A CN 108000823 B CN108000823 B CN 108000823B
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- 238000005187 foaming Methods 0.000 title claims abstract description 89
- 239000000126 substance Substances 0.000 title claims abstract description 64
- 238000001746 injection moulding Methods 0.000 title claims description 79
- 238000002347 injection Methods 0.000 claims abstract description 138
- 239000007924 injection Substances 0.000 claims abstract description 138
- 239000003292 glue Substances 0.000 claims abstract description 124
- 239000000155 melt Substances 0.000 claims abstract description 43
- 239000000853 adhesive Substances 0.000 claims abstract description 42
- 230000001070 adhesive effect Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000007723 die pressing method Methods 0.000 claims abstract description 11
- 239000010720 hydraulic oil Substances 0.000 claims description 71
- 230000006698 induction Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 22
- 230000000670 limiting effect Effects 0.000 claims description 20
- 239000011265 semifinished product Substances 0.000 claims description 16
- 239000000047 product Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 13
- 239000004088 foaming agent Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- 230000002829 reductive effect Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000004513 sizing Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010309 melting process Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 12
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013012 foaming technology Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3442—Mixing, kneading or conveying the foamable material
- B29C44/3446—Feeding the blowing agent
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
- B29C44/422—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by injecting by forward movement of the plastizising screw
-
- 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
- B29C45/1742—Mounting of moulds; Mould supports
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3008—Instrument panels
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3014—Door linings
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides injection equipment which has a simple structure, a secondary die closing function and high injection speed and can meet the micro-foaming molding, and comprises a movable die plate, a die closing head plate, a holding gate plate, a tie bar, a die moving pressure cylinder and a melt adhesive injection mechanism which are arranged on a supporting platform, wherein a pressurizing plate is further arranged on the front side of the die closing head plate, a front die is fixed on the front side of the pressurizing plate, a high-pressure die pressing cylinder is arranged in the die closing head plate, the pressurizing plate is connected with the pressurizing plate through the high-pressure die pressing cylinder, a glue injection head is arranged on the pressurizing plate, and a glue injection device is arranged between the melt adhesive injection mechanism and the die closing head plate, and the melt adhesive injection mechanism is connected with the glue injection head through the glue injection device. The invention also provides a chemical micro-foaming molding method with short movement period, high secondary die opening control precision and stable and controllable glue injection process.
Description
Technical Field
The invention belongs to the field of injection molding equipment and application, and relates to special injection molding equipment for chemical micro-foaming and a novel micro-foaming molding process.
Development background
According to investigation, the oil consumption of hundred kilometers can be reduced by 0.3-0.6 liter when the whole weight of the automobile is reduced by 100 kg. Along with the requirements of the national second-stage fuel index of 5L/100Km and the popularization and popularization of electric automobiles, the weight reduction of automobile materials has become an industrial trend. In the field of light weight of non-metal parts of automobiles, chemical micro-foaming materials are widely applied to automobile interior trim parts, mainly in parts such as door lining plates, instrument boards, back door lining plates, bottom guard plates and the like of automobiles, and the chemical micro-foaming technology is a main technical means for competitive use of various automobile manufacturers.
The chemical micro-foaming (Microcellular Foaming) is to use a thermoplastic material as a matrix and a chemical foaming agent as an air source, enable the air to form a supercritical state through a self-locking process, and enable the middle distribution size theory of the product to be closed micro-pore foaming from tens to tens of micrometers under the action of the internal pressure of air diffusion after the air is injected into a die cavity. At present, the micro-foaming injection molding technology breaks through a plurality of limitations of traditional injection molding, can obviously lighten the weight and the molding period of a finished product on the basis of basically ensuring the performance of the finished product, and has the characteristics of small internal stress and warpage, high flatness, no shrinkage, stable size and the like. The chemical micro-foaming technology requires that the injection molding machine has higher glue injection speed and extremely high mold opening position precision, no industrial equipment and technology for chemical micro-foaming injection molding exist in China, and the chemical micro-foaming injection molding machines commonly used in the market are basically imported injection molding machines or all-electric injection molding machines in the world and have extremely high price, so the development of the chemical micro-foaming injection molding equipment and the molding technology has extremely wide application prospect.
Disclosure of Invention
The invention aims to solve the technical problems of providing a mold clamping device which has simple structure, secondary mold clamping function and can provide micro-mold opening movement the injection speed is high, and the micro-foaming molding injection molding equipment can be met.
The invention aims to solve the other technical problem of providing the chemical micro-foaming forming method which has the advantages of short movement period, high secondary die opening control precision and stable and controllable glue injection process.
In order to solve the former technical problem's a little foaming injection molding equipment of chemistry, including setting up movable mould board on supporting platform, the compound die plate, hold the flashboard, the tiebar, move die cylinder and melt adhesive injection mechanism, the die plate is fixed to be set up on supporting platform, the movable mould board sets up on the supporting platform who closes the die plate front side, the movable mould board is through tiebar and move die cylinder and link joint die plate and do relative axial motion, hold the tiebar in connection with the tiebar, melt adhesive injection mechanism connects at the compound die plate rear side, the rear mould is fixed on the movable mould board, wherein: the front side of the die closing plate is also provided with a pressurizing plate, the front die is fixed on the front side of the pressurizing plate, the die closing plate is internally provided with a high-pressure die pressing cylinder which is connected with the pressurizing plate, the pressurizing plate is provided with a glue injecting head, a glue injecting device is arranged between the glue injecting mechanism and the die closing plate, and the glue injecting mechanism is connected with the glue injecting head through the glue injecting device.
The chemical micro-foaming injection molding equipment comprises a plasticizing motor, a shooting table movable plate, a shooting rubber pressure cylinder, a shooting table front plate, a hopper, a melt rubber cylinder, an injection screw rod, a shooting shifting device and a melt pressure sensor, wherein the front end of the melt rubber cylinder is inserted and positioned in a die closing head plate, the rear end of the melt rubber cylinder is movably positioned on a supporting platform through the shooting table front plate, the shooting table movable plate is movably positioned on the supporting platform at the rear side of the shooting table front plate, the plasticizing motor is arranged on the shooting table movable plate, the injection screw rod is inserted in the melt rubber cylinder, the rear end of the injection screw rod is connected with the plasticizing motor on the shooting table movable plate, and the shooting table movable plate is connected with the shooting table front plate through the shooting rubber pressure cylinder.
According to the chemical micro-foaming injection molding equipment, the adjusting limiting block is arranged on the die clamping head plate, and the distance between the adjusting limiting block and the pressurizing plate is delta L.
The chemical micro-foaming injection molding equipment further comprises a front mold, a rear mold, an induction magnetic ring and a non-contact electronic ruler, wherein the non-contact electronic ruler is fixed on the rear mold, the rear mold is fixed on the movable template, the induction magnetic ring is fixed on the front mold, the front mold is fixed on the pressurizing plate, and the non-contact electronic ruler is connected with the control system.
In the chemical micro-foaming injection molding equipment, a melt pressure sensor, a sealing nozzle and a static mixer are arranged in the glue injection head.
The mold moving pressure cylinder comprises a mold moving pump and a mold moving pump core, wherein the mold moving pump core is arranged in the mold moving pump to form a mold moving rodless cavity and a mold moving rod cavity, the mold moving pump is fixed on a mold closing plate, the mold moving pump core is fixed on a movable mold plate through a connecting plate, the mold moving rodless cavity is connected with a power unit through a control switch, and the mold moving rod cavity is connected with the power unit through the control switch.
The chemical micro-foaming injection molding equipment comprises a high-pressure pump and a high-pressure pump core arranged in the high-pressure pump, wherein the high-pressure pump is arranged in a die closing head plate, the high-pressure pump core is connected with a pressurizing plate, the high-pressure pump core and the die closing head plate form a high-pressure rodless cavity and a high-pressure rod cavity, the high-pressure rodless cavity is connected with a power unit through a control switch, and the high-pressure rod cavity is connected with the power unit through the control switch.
According to the chemical micro-foaming injection molding equipment, the movable template, the pressurizing plate and the die closing head plate are arranged on the supporting platform, the tie bar is arranged on the die closing head plate, and the movable template can move along the axial direction of the tie bar.
According to the chemical micro-foaming injection molding equipment, the annular grooves are formed in the tie bar and the holding flashboard, and the tie bar and the holding flashboard can be meshed with each other.
The chemical micro-foaming injection molding equipment further comprises a control system, a control switch, a power unit and a power unit which are in control connection with the control system, and a sealing nozzle, a melt pressure sensor and a plasticizing motor which are also connected with the control system.
The chemical micro-foaming injection molding equipment comprises the glue injection pump and the glue injection pump core arranged in the glue injection pump, wherein the glue injection pump is arranged in the front plate of the injection platform, the output end of the glue injection pump core is connected with the movable plate of the injection platform, the glue injection pump core and the glue injection pump form a glue injection rod cavity and a glue injection rod-free cavity, the glue injection rod cavity is connected with the energy accumulator through the control switch, meanwhile, the glue injection rod-free cavity is connected with the power unit through the control switch, and the glue injection rod-free cavity is connected with the power unit through the control switch.
The chemical micro-foaming injection molding equipment comprises a shooting table front plate, a shooting table movable plate, a shooting table backing plate, a supporting platform, a chemical micro-foaming injection molding device and a chemical micro-foaming injection molding device.
The chemical micro-foaming injection molding equipment is characterized in that the power unit is connected with the band-type brake linkage device through the control switch and the control switch.
According to the chemical micro-foaming injection molding equipment, the power unit is also connected with the energy accumulator, and the energy accumulator is connected with the power unit through the control switch.
The chemical micro-foaming forming equipment adopting the technical scheme comprises the following parts: the device comprises a plasticizing motor, a shooting table movable plate, a shooting rubber pump, a shooting table front plate, a hopper, a melt rubber cylinder, an injection molding screw rod, a shooting and moving device, a melt pressure sensor, a static mixer, a head, a sealing nozzle, a mould moving pump core, a mould moving pump, a tie rod, a connecting plate, a holding gate plate, a supporting platform, a movable template, a pressurizing plate, an adjusting limiting block, a high-pressure pump core, a mould closing head plate, a power unit, a control system, a shooting table base plate and an energy accumulator, and further comprises a control switch and a holding gate linkage device; the glue injecting pump core and the glue injecting pump form a glue injecting rod cavity and a glue injecting rod-free cavity, the glue injecting rod cavity is respectively connected with the power unit and the energy accumulator through the control switch and the control switch, and the glue injecting rod-free cavity is connected with the power unit through the control switch; the die shifting pump core and the die shifting pump form a die shifting rodless cavity and a die shifting rod cavity, the die shifting rodless cavity is connected with the power unit through the control switch, the die shifting rod cavity is connected with the power unit through the control switch, the die shifting pump is fixed on the die closing plate, and the die shifting pump core is fixed on the movable die plate through the connecting plate; the high-pressure pump core is connected with the pressurizing plate, the high-pressure pump core and the die clamping head plate form a high-pressure rodless cavity and a high-pressure rod cavity, the high-pressure rod cavity is connected with the power unit through the control switch, and the high-pressure rodless cavity is connected with the power unit through the control switch; the power unit is connected with the energy accumulator through the control switch; the power unit is connected with the band-type brake linkage device through a control switch; the control system is connected with each control switch and two power units, and is also connected with the sealing nozzle, the melt pressure sensor and the plasticizing motor; the shooting table front plate and the shooting table movable plate are arranged on a shooting table base plate and can axially move along the shooting table base plate, and the shooting table base plate is fixed on the supporting platform; the plasticizing motor is arranged on the movable plate of the injection table and is connected with the injection screw; the melt pressure sensor, the static mixer and the sealing nozzle are arranged on the head; the shooting and moving device is connected with the shooting table front plate and the pressurizing plate; the movable template, the pressurizing plate and the die closing head plate are arranged on the supporting platform, the tie bar is arranged on the die closing head plate, and the movable template can move along the axial direction of the tie bar; ring grooves are formed in the tie bar and the holding flashboard and can be mutually meshed; the adjusting limiting block is fixed on the die closing plate and is adjustable in height; the control system and the two power units and the energy accumulator are fixed on the supporting platform; the melt pressure sensor is used for detecting the pressure of molten sizing material in the charging barrel and preventing small bubbles from decomposing in advance; the static mixer is used for better mixing of small bubbles and molten sizing materials in the injection process; the sealing nozzle is used for preventing the molten rubber from flowing out in the process of melting the rubber, ensuring the space inside the charging barrel to be sealed and keeping the pressure of the molten rubber; the energy accumulator is used for obtaining high-speed glue injection speed, and the limiting block is used for providing mechanical limiting when the micro-opening is performed in extremely short time and high speed, so that the micro-opening precision is ensured; in order to realize the chemical micro-foaming molding process by matching with the chemical micro-foaming molding equipment, the chemical micro-foaming molding equipment also comprises the following parts: front mould, back mould, induction magnetic ring, non-contact electronic ruler, plastic raw material and foaming agent. Wherein the non-contact electronic ruler is fixed on the rear mould, and the rear mould is fixed on the movable mould plate; the induction magnetic ring is fixed on a front die, and the front die is fixed on the pressurizing plate; the non-contact electronic ruler is connected with the control system, and the non-contact electronic ruler and the induction magnetic ring are mainly used for obtaining the accurate micro-foaming distance.
A chemical micro-foaming injection molding process, comprising the following steps:
plasticizing plastic raw materials and a foaming agent into molten rubber and small bubbles in a glue melting process, and keeping a certain melting pressure of the molten rubber in a glue melting cylinder to prevent the small bubbles from being decomposed into large bubbles; step two, a die assembly procedure, namely, high-pressure die assembly is carried out on the rear die by attaching the front die; step three, injecting glue, namely after high-pressure die closing is completed, rapidly injecting molten glue into a die cavity of a die, and step four, foaming, namely slightly opening the front die and the rear die for a certain distance to release the pressure in the die cavity, wherein small bubbles in a semi-finished product are further expanded into large bubbles; and step five, a mold opening process is carried out, and a foaming product with uniform and compact gas distribution is obtained.
In the step (I), a glue melting procedure, a plastic raw material and a foaming agent are decomposed into a molten glue material and small bubbles in a glue melting cylinder through an injection molding screw, and meanwhile, a certain pressure value in the molten glue material is ensured, so that the small bubbles are prevented from being decomposed and amplified; wherein the pressure value is 0.1-1.0MPa, preferably 0.5.
In the second step, in the mold clamping step, first, the movable platen and the rear mold are moved in the forward mold direction, when the rear die is attached to the front die, the band-type brake plate is folded to hold the tie bar; further, the high-pressure die is pressed, the high-pressure pump core pushes the pressurizing plate to drive the front die to be tightly attached to the rear die, the system plays the high-pressure die force at the moment, and the rear tooth surface of the gate holding ring groove is tightly attached to the rear tooth surface of the tie bar ring groove;
In the step (III), a glue injection procedure, after being further mixed by a static mixer, molten glue and small bubbles are injected into a die cavity formed by a rear die and a front die at a high speed, and the die cavity is quickly filled;
in the step (IV), the foaming process, the high-pressure pumping core drives the pressurizing plate to enable the front die to leave the rear die for a small distance delta L', and at the moment, small bubbles in the semi-finished product swell into large bubbles because the pressure of the die cavity is reduced after the die is slightly opened; wherein the distance DeltaL' is preferably 0.1-2.0mm, more preferably 0.8.
In the step (V), a mold opening procedure is carried out, after cooling is finished, the shaping of the semi-finished product wrapped with the air bubbles is finished, and the holding flashboard and the tie bar are separated; and the movable mould plate and the rear mould move towards the direction away from the front mould to obtain a complete foaming product.
In the step (I), when the glue is melted, the sealing nozzle is closed, the plasticizing motor drives the injection screw to rotate, the plastic raw material and the foaming agent are decomposed into molten glue and small bubbles in the glue cylinder through the injection screw, hydraulic oil is naturally sucked into the glue injection rodless cavity from the power unit through the control switch, hydraulic oil in the glue injection rodless cavity flows back to the power unit through the control switch, the injection screw retreats, and meanwhile, the control switch is adjusted to ensure a certain pressure value in the molten glue, so that the decomposition and amplification of the small bubbles are prevented, and the pressure value of the molten glue can be read out through the solution pressure sensor; the power unit also charges the accumulator with high-pressure hydraulic oil through the control switch.
In the chemical micro-foaming injection molding process, in the step (II), the control switch is turned on, and hydraulic oil enters the band-type brake linkage device from the power unit, so that the band-type brake plate and the tie bar are separated; hydraulic oil enters the rod cavity of the movable mould from the power unit through the control switch, and hydraulic oil flows back to the power unit from the rod-free cavity of the movable mould through the control switch, and at the moment, the movable mould plate and the rear mould are driven to move towards the front mould by the movable mould pumping core.
In the step (III), when the rear die is attached to the front die, the non-contact electronic ruler passes through the induction magnetic ring; hydraulic oil enters the band-type brake linkage device from the power unit through the control switch, so that the band-type brake plate folds to hold the tie bar.
In the step (two), high-pressure hydraulic oil enters the high-pressure rodless cavity from the power unit through the control switch, the hydraulic oil in the high-pressure rodless cavity flows back to the power unit through the control switch, the high-pressure pump core pushes the pressurizing plate to drive the front die to be tightly attached to the rear die, at the moment, the system plays high-pressure die pressing force, and the tooth surface of the rear tooth surface of the ring groove of the holding flashboard is tightly attached to the tooth surface of the rear tooth of the ring groove of the tie bar.
In the step (III), when injecting glue, the sealing nozzle is opened, high-pressure hydraulic oil of the energy accumulator enters the glue injecting rod cavity through the control switch, the hydraulic oil flows back to the power unit from the glue injecting rod-free cavity through the control switch, and molten glue and small bubbles are injected into a die cavity formed by the rear die and the front die at a high speed after being further mixed by the static mixer;
In the step (III), after the molten sizing material and the small bubbles are filled in the die cavity rapidly, the sealing nozzle is closed, high-pressure hydraulic oil enters the moving die rodless cavity from the power unit through the control switch, and the hydraulic oil flows back to the power unit from the moving die rodless cavity through the control switch, so that the rear tooth surface of the ring groove of the band-type brake plate is continuously clung to the rear tooth surface of the ring groove of the tie bar;
in the chemical micro-foaming injection molding process, in the step (four), high-pressure hydraulic oil enters a high-pressure rod cavity from a power unit through a control switch, the hydraulic oil flows back to the power unit from a high-pressure rod-free cavity through the control switch, the high-pressure pump core drives the pressurizing plate to enable the front die to leave the rear die for a small distance delta L ', the non-contact electronic ruler detects delta L' through the induction magnetic ring, and at the moment, small bubbles in a semi-finished product swell into large bubbles because of the pressure reduction of a die cavity after the micro die opening.
In the step (four), the high-pressure pumping core drives the pressurizing plate to retract and cling to the adjusting limiting block, the distance between the front die and the rear die is delta L which is the same as the distance between the front pressurizing plate and the adjusting limiting block, meanwhile, the non-contact electronic ruler detects delta L through the induction magnetic ring, and at the moment, small bubbles in the semi-finished product swell into large bubbles because of the pressure reduction of the die cavity after die opening.
In the step (five), after cooling is completed, shaping the semi-finished product wrapped with the air bubbles, opening a control switch, and enabling hydraulic oil to enter the band-type brake linkage device from the power unit so as to separate the band-type brake plate from the tie bar; hydraulic oil enters the movable mould rodless cavity from the power unit through the control switch, meanwhile, hydraulic oil flows back to the power unit from the movable mould rod cavity through the control switch, and the movable mould core drives the movable mould plate and the rear mould to move in the direction away from the front mould, so that a complete foaming product is obtained.
According to the chemical micro-foaming injection molding process adopting the technical scheme, when the melt adhesive is melted, the sealing nozzle is closed, the plasticizing motor drives the injection screw to rotate, the adhesive raw material and the foaming agent are decomposed into molten adhesive and small bubbles in the melt adhesive cylinder through the injection screw, at the moment, the control switch and the control switch are opened, hydraulic oil enters the adhesive injection rodless cavity from the power unit and returns to the power unit from the adhesive injection rod cavity, the injection screw retreats, and meanwhile, the control switch is adjusted to ensure that a certain pressure value exists in the molten adhesive, the decomposition and amplification of the small bubbles are prevented, the pressure value of the molten adhesive can be read out through the solution pressure sensor, and the power unit synchronously charges hydraulic oil to the energy accumulator; then, the control switch is opened, hydraulic oil enters the band-type brake linkage device from the power unit, so that the band-type brake plate and the tie bar are separated, the hydraulic oil enters the movable mould rod cavity from the power unit through the control switch, and the hydraulic oil returns to the power unit from the movable mould rod-free cavity, and at the moment, the movable mould plate and the rear mould are driven to move towards the front mould by the movable mould pump core; when the rear die is attached to the front die, the non-contact electronic ruler passes through the induction magnetic ring; at the moment, the control switch is opened, hydraulic oil enters the band-type brake linkage device from the power unit to enable the band-type brake plate and the tie bar to be tightly held, then high-pressure hydraulic oil enters the high-pressure rodless cavity from the power unit through the control switch, and the hydraulic oil in the high-pressure rodless cavity flows back to the power unit through the control switch; the high-pressure pump core pushes the pressurizing plate to drive the rear die to be tightly attached to the front die, the high-pressure die pressing force is exerted by the system, and the rear tooth surface of the gate-holding ring groove is tightly attached to the rear tooth surface of the tie-bar ring groove; at the moment, the distance between the regulating limiting block and the pressurizing plate is regulated to be delta L; when injecting glue, the sealing nozzle is opened, hydraulic oil of the energy accumulator enters into a glue injecting rod cavity through the control switch, the hydraulic oil flows back to the power unit from the glue injecting rod-free cavity through the control switch, and molten glue and small bubbles are further mixed through the static mixer and then are injected into a die cavity formed by the rear die and the front die at a high speed; after the molten sizing material and small bubbles are rapidly filled in the die cavity, the sealing nozzle is closed, hydraulic oil enters the movable die rodless cavity from the power unit through the control switch, and the hydraulic oil flows back to the power unit from the movable die rodless cavity through the control switch, so that the rear tooth surface of the ring groove of the band-type brake plate continuously clings to the rear tooth surface of the ring groove of the tie bar; meanwhile, hydraulic oil enters the high-pressure rod cavity from the power unit through the control switch, and the hydraulic oil flows back to the power unit from the high-pressure rod-free cavity through the control switch, the high-voltage pump core drives the pressurizing plate to enable the front die to leave the rear die for a distance delta L ', and meanwhile, the non-contact electronic ruler detects the delta L' through the induction magnetic ring; at the moment, as the pressure of the die cavity is reduced after the die is opened, small bubbles in the semi-finished product swell into large bubbles; another ajar feature is as follows: when the rear tooth surface of the ring groove of the band-type brake plate continuously clings to the rear tooth surface of the ring groove of the tie rod, hydraulic oil enters a high-pressure rod cavity from the power unit through a control switch, hydraulic oil flows back to the power unit from the high-pressure rod-free cavity through the control switch, the high-pressure pump core drives the pressurizing plate to enable the front die to leave the rear die, the pressurizing plate retreats to cling to the adjusting limiting block, at the moment, the distance between the front die and the rear die is delta L, and meanwhile, the non-contact electronic ruler detects delta L through the induction magnetic ring; at the moment, as the pressure of the die cavity is reduced after the die is opened, small bubbles in the semi-finished product swell into large bubbles; after cooling is finished, the control switch is opened, and hydraulic oil enters the band-type brake linkage device from the power unit, so that the band-type brake plate and the tie bar are separated; then, hydraulic oil enters the movable mould rodless cavity from the power unit through the control switch, and the hydraulic oil returns to the power unit from the movable mould rod cavity through the control switch, and the movable mould plate and the rear mould are driven to move in the direction away from the front mould by the movable mould pump core, so that a complete foaming product is obtained.
The chemical micro-foaming injection molding equipment and the molding process can provide proper foaming products for automobile thin-wall products such as doors, bumpers, instrument panels and the like, can obtain plastic products with small internal stress and high bending modulus while reducing the weight, are widely applied, and are greatly helpful for the popularization of the lightweight development of the automobile industry and are also expected to be popularized to the market of other plastic industries.
Drawings
The invention will be described in further detail below with reference to examples of embodiments in the drawings, without however constituting any limitation thereof.
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a cross-section of the present invention the structural schematic diagram is further described;
FIG. 3 is a schematic view of the cross-sectional structure of FIG. 1 in the P-direction;
FIG. 4 is the cradle head and the brother of FIG. 3 a process schematic diagram of a forest column separation action;
FIG. 5 is the cradle head and tie bar of FIG. 4 a schematic enlarged view of a section A-A of the separation structure;
FIG. 6 is a schematic process diagram of the present invention melt adhesive, energy storage, and mold closing actions;
FIG. 7 shows a high-pressure bonding apparatus according to the present invention actuated by mould a process schematic;
FIG. 8 is a schematic view of the closing motion of the arming plate and the tie bar of FIG. 3;
FIG. 9 is an enlarged schematic view of section B-B of the closure of the cradle block and tie bar of FIG. 8;
FIG. 10 is a schematic diagram of the process of the accumulator Gao Sushe glue action of the present invention;
FIG. 11 shows the slight opening of the die according to the invention a process schematic of a foaming action;
FIG. 12 is a schematic process diagram of a mold ajar foaming action utilizing an adjustment stop device in accordance with the present invention;
FIG. 13 is a schematic illustration of the present invention forming the foaming product a process schematic diagram of the template opening motion.
In the figure: the mold moving pressure cylinder 1a, the melt adhesive injection mechanism 1b, the high-pressure mold pressure cylinder 1c, the injection pressure cylinder 1d, the high-pressure pump 1e, the plasticizing motor 1, the injection table movable plate 2, the injection table gasket 28, the energy accumulator 29, the injection molding rod cavity 30, the injection table front plate 5, the hopper 6, the melt adhesive cylinder 7, the injection molding screw 8, the injection moving device 9, the melt pressure sensor 10, the static mixer 11, the head 12, the sealing nozzle 13, the mold moving pump core 14, the mold moving pump 15, the tie rod 16, the connecting plate 17, the band-type brake plate 18, the supporting platform 19, the movable mold plate 20, the pressurizing plate 21, the adjusting limiting block 22, the high-pressure pump core 23, the mold clamping head plate 24, the power unit 25, the power unit 26, the control system 27, the injection table gasket 28, the energy accumulator 29, the injection molding rod cavity 30, the injection molding rod cavity 31, the plastic raw material 32, the foaming agent 33, the mold moving rod cavity 34, the mold moving rod cavity 35, the high-free cavity 36, the high-pressure rod cavity 37, the front mold 38, the induction mold 39, the electronic scale 40, the non-contact mold 40, the control rod 45, the magnetic ring 48, the magnetic ring 52, the foaming device 52, the magnetic ring 52, the small-shaped articles 52, the small-form-locking device 52, the small-bubble device 52, the small-size 43, the small-size and the linkage device 52.
Detailed Description
Referring to fig. 1 to 13, a chemical micro-foaming injection molding device and a molding process, the two-plate injection molding machine of the main device comprises a movable mold plate 20, a die-closing plate 24, a band-type brake plate 18, a tie bar 16, a moving mold pressure cylinder 1a and a melt adhesive injection mechanism 1b which are arranged on a supporting platform 19, wherein the die-closing plate 24 is fixedly arranged on the supporting platform 19, the movable mold plate 20 is arranged on the supporting platform 19 on the front side of the die-closing plate 24, the movable mold plate 20 is connected with the die-closing plate 24 through the tie bar 16 and the moving mold pressure cylinder 1a to perform relative axial movement, the band-type brake plate 18 is connected with the tie bar 16, the melt adhesive injection mechanism 1b is connected with the rear side of the die-closing plate 24, and a rear mold 41 is fixed on the movable mold plate 20, and the chemical micro-foaming injection molding device is characterized in that: the front side of the die clamping plate 24 is also provided with a pressurizing plate 21, a front die 38 is fixed on the front side of the pressurizing plate 21, the die clamping plate 24 is internally provided with a high-pressure die pressing cylinder 1c, the pressurizing plate 21 is connected with the high-pressure die pressing cylinder 1c, the pressurizing plate 21 is provided with a glue injection head 12, a glue injection device 9 is arranged between the glue injection mechanism 1b and the die clamping plate 24, and the glue injection mechanism 1b is connected with the glue injection head 12 through the glue injection device 9. The shooting device 9 is a telescopic hydraulic pressure cylinder controlled by a power unit.
The melt adhesive injection mechanism 1b comprises a plasticizing motor 1, an injection platform movable plate 2, an injection pressure cylinder 1d, an injection platform front plate 5, a hopper 6, a melt adhesive cylinder 7, an injection screw 8, an injection shifting device 9 and a melt pressure sensor 10, wherein the front end of the melt adhesive cylinder 7 is inserted and positioned in a die clamping head plate 24, the rear end of the melt adhesive cylinder 7 is movably positioned on a supporting platform 19 through the injection platform front plate 5, the injection platform movable plate 2 is movably positioned on the supporting platform 19 at the rear side of the injection platform front plate 5, the plasticizing motor 1 is arranged on the injection platform movable plate 2, the injection screw 8 is inserted in the melt adhesive cylinder 7, the rear end of the injection screw is connected with the plasticizing motor 1 on the injection platform movable plate 2, and the injection platform movable plate 2 is connected with the injection platform front plate 5 through the injection pressure cylinder 1 d.
The die closing plate 24 is provided with an adjusting limiting block 22, and the distance between the adjusting limiting block 22 and the pressurizing plate 21 is delta L.
The device further comprises a front die 38, a rear die 41, an induction magnetic ring 39 and a non-contact electronic ruler 40, wherein the non-contact electronic ruler 40 is fixed on the rear die 41, the rear die 41 is fixed on the movable die plate 20, the induction magnetic ring 39 is fixed on the front die 38, the front die 38 is fixed on the pressurizing plate 21, and the non-contact electronic ruler 40 is connected with the control system 27.
The glue injection head 12 is provided with a melt pressure sensor 10, a sealing nozzle 13 and a static mixer 11.
The die-moving pressure cylinder 1a comprises a die-moving pump 15 and a die-moving pump core 14, wherein the die-moving pump core 14 is arranged in the die-moving pump 15 to form a die-moving rodless cavity 34 and a die-moving rod cavity 35, the die-moving pump 15 is fixed on a die-combining plate 24, the die-moving pump core 14 is fixed on a moving die plate 20 through a connecting plate 17, the die-moving rodless cavity 34 is connected with a power unit 25 through a control switch 45, and the die-moving rod cavity 35 is connected with the power unit 25 through a control switch 44.
The high-pressure die cylinder 1c includes a high-pressure pump 1e and a high-pressure pump core 23 in the high-pressure pump 1e, the high-pressure pump 1e is provided in a die head plate 24, the high-pressure pump core 23 is connected with a pressurizing plate 21, the high-pressure pump core 23 and the die head plate 24 form a high-pressure rodless chamber 36 and a high-pressure rod chamber 37, the high-pressure rodless chamber 36 is connected with a power unit 26 through a control switch 47, and the high-pressure rod chamber 37 is connected with the power unit 26 through a control switch 46.
The movable die plate 20, the pressurizing plate 21 and the die closing head plate 24 are arranged on the supporting platform 19, the tie bar 16 is arranged on the die closing head plate 24, and the movable die plate 20 can axially move along the tie bar 16.
The tie bar 16 and the band-type brake plate 18 are provided with annular grooves which can be mutually engaged.
The control system 27 and the control switches 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, the power unit 25 and the power unit 26 which are connected in a control manner are also included, and the nozzle 13, the melt pressure sensor 10 and the plasticizing motor 1 are also connected.
The glue injection pressure cylinder 1d comprises a glue injection pump 4 and a glue injection pump core 3 in the glue injection pump 4, the glue injection pump 4 is arranged in a front plate 5 of a glue injection platform, the output end of the glue injection pump core 3 is connected with a movable plate 2 of the glue injection platform, the glue injection pump core 3 and the glue injection pump 4 form a glue injection rod cavity 30 and a glue injection rod-free cavity 31, the glue injection rod cavity 30 is connected with an energy accumulator 29 through a control switch 50, and meanwhile, the glue injection rod-free cavity 31 is connected with a power unit 26 through a control switch 51.
The stage front plate 5 and the stage moving plate 2 are mounted on a stage pad 28 and are movable axially along the stage pad 28, the stage pad 28 being fixed to the support platform 19.
The power unit 25 is connected to the band-type brake linkage 52 via a control switch 42 and a control switch 43.
The power unit 26 is also connected with an accumulator 29, which are connected by a control switch 49.
The invention relates to a chemical micro-foaming injection molding process, its shaping technology the method comprises the following steps:
step one, in the process of glue melting, when the glue melting process is carried out, a sealing nozzle 13 is sealed, a plasticizing motor 1 drives an injection molding screw 8 to rotate, a plastic raw material 32 and a foaming agent 33 are decomposed into molten glue 53 and small bubbles 54 in a glue melting cylinder 7 through the injection molding screw 8, at the moment, a control switch 48 and a control switch 51 are opened, hydraulic oil is naturally sucked into a glue injection rodless cavity 31 from a power unit 26, hydraulic oil in a glue injection rod cavity 30 naturally flows back to the power unit 26, the injection molding screw 8 is retreated, meanwhile, the control switch 51 is adjusted, a certain pressure value P in the molten glue 53 is ensured to prevent the decomposition and amplification of the small bubbles 54, and the pressure value of the molten glue 53 can be read out through a solution pressure sensor 10; the power unit 26 also charges the accumulator 29 with high-pressure hydraulic oil through the control switch 49;
Step two, a die assembly process, wherein the control switch 42 is opened, and hydraulic oil enters the band-type brake linkage device 52 from the power unit 25, so that the band-type brake plate 18 and the tie bar 16 are separated; hydraulic oil enters the movable mold rod cavity 35 from the power unit 25 through the control switch 44, and hydraulic oil flows back to the power unit 25 from the movable mold rod-free cavity 34 through the control switch 45, and at the moment, the movable mold plate 20 and the rear mold 41 are driven by the movable mold pumping core 14 to move towards the front mold 38;
when the rear mold 41 is attached to the front mold 38, the non-contact electronic ruler 40 passes through the induction magnetic ring 39; hydraulic oil enters the band-type brake linkage 52 from the power unit 25 through the control switch 43, so that the band-type brake plate 18 is folded to hold the tie bar 16;
the high-pressure hydraulic oil enters the high-pressure rodless cavity 36 from the power unit 26 through the control switch 47, the hydraulic oil in the high-pressure rod cavity 37 flows back to the power unit 26 through the control switch 46, the high-pressure pumping core 23 pushes the pressurizing plate 21 to drive the front die 38 to be tightly attached to the rear die 41, the high-pressure molding force is exerted by the system, and the rear tooth surface of the ring groove of the holding flashboard 18 is tightly attached to the rear tooth surface of the ring groove of the tie-bar 16;
at this time, the distance between the regulating stopper 22 and the pressurizing plate 21 is adjusted to Δl;
step three, in the glue injection process, when glue is injected, the sealing nozzle 13 is opened, high-pressure hydraulic oil of the energy accumulator 29 instantaneously enters the glue injection rod cavity 30 through the control switch 50, and the hydraulic oil flows back to the power unit 26 from the glue injection rod-free cavity 31 through the control switch 48, and after being further mixed through the static mixer 11, molten glue 53 and small bubbles 54 are injected into a die cavity formed by the rear die 41 and the front die 38 at a high speed;
After the molten sizing material 53 and the small bubbles 54 are filled in the die cavity rapidly, the sealing nozzle is closed, high-pressure hydraulic oil enters the shifting-die rodless cavity 34 from the power unit 25 through the control switch 45, and the hydraulic oil flows back to the power unit 25 from the shifting-die rod cavity 35 through the control switch 44, so that the rear tooth surface of the ring groove of the band-type brake plate 18 is continuously clung to the rear tooth surface of the ring groove of the tie bar 16;
step four, a foaming process, wherein high-pressure hydraulic oil enters a high-pressure rod cavity 37 from a power unit 26 through a control switch 46, and the hydraulic oil flows back to the power unit 26 from a high-pressure rod-free cavity 36 through a control switch 47, and the high-pressure pump core 23 drives the pressurizing plate 21 to enable the front die 38 to leave the rear die 41 for a small distance delta L ', and the non-contact electronic ruler 40 detects the delta L' through the induction magnetic ring 39;
or the pressurizing plate 21 is retracted to abut against the regulating stopper 22, at this time, the distance between the front die 38 and the rear die 41 is Δl, the distance delta L between the pressurizing plate 21 and the adjusting limiting block 22 is the same as the distance delta L between the pressurizing plate and the adjusting limiting block, and meanwhile, the non-contact electronic ruler 40 detects the delta L through the induction magnetic ring 39;
at this time, as the mold cavity pressure is reduced after mold opening, small bubbles 54 in the semi-finished product swell into large bubbles 55;
step five, a mold opening procedure is performed, after cooling is completed, the shaping of the semi-finished product wrapping the cheongsam is completed, the control switch 42 is opened, hydraulic oil enters the band-type brake linkage device 52 from the power unit 25, and the band-type brake plate 18 and the tie bar 16 are separated; hydraulic oil enters the movable mold rodless cavity 34 from the power unit 25 through the control switch 45, meanwhile, hydraulic oil flows back to the power unit 25 from the movable mold rod cavity 35 through the control switch 44, and the movable mold plate 20 and the rear mold 41 are driven by the movable mold pumping core 14 to move in a direction away from the front mold 38, so that a complete foaming product 56 is obtained.
In summary, the present invention has been described and illustrated in the specification, and has been made into practical samples and tested for multiple uses, and from the effect of the use test, it can be proved that the present invention can achieve its intended purpose, and the practical value is undoubted. The above embodiments are only for illustrating the present invention, and are not to be construed as limiting the invention in any way, and any person having ordinary skill in the art will realize that equivalent embodiments of partial changes and modifications can be made by using the disclosed technology without departing from the scope of the technical features of the present invention.
Claims (23)
1. The utility model provides a little foaming injection molding equipment of chemistry, including movable mould board (20) that sets up on supporting platform (19), die clamping head board (24), band-type brake board (18), tie bar (16), move die pressure jar (1 a) and melt adhesive injection mechanism (1 b), die clamping head board (24) are fixed to be set up on supporting platform (19), movable mould board (20) set up on supporting platform (19) of die clamping head board (24) front side, movable mould board (20) are connected die clamping head board (24) through tie bar (16) and move die pressure jar (1 a) and are done relative axial motion, tie bar (16) are connected to band-type brake board (18), melt adhesive injection mechanism (1 b) are connected at die clamping head board (24) rear side, back mould (41) are fixed on movable mould board (20), its characterized in that: the front side of the die closing plate (24) is also provided with a pressurizing plate (21), a front die (38) is fixed on the front side of the pressurizing plate (21), a high-pressure die pressing cylinder (1 c) is arranged in the die closing plate (24), the pressurizing plate (21) is connected through the high-pressure die pressing cylinder (1 c), the pressurizing plate (21) is provided with a glue injection head (12), a glue injection device (9) is arranged between the glue injection mechanism (1 b) and the die closing plate (24), and the glue injection mechanism (1 b) is connected with the glue injection head (12) through the glue injection device (9); the high-pressure die pressing cylinder (1 c) comprises a high-pressure pump (1 e) and a high-pressure pump core (23) in the high-pressure pump (1 e), the high-pressure pump (1 e) is arranged in a die clamping head plate (24), the high-pressure pump core (23) is connected with a pressurizing plate (21), the high-pressure pump core (23) and the die clamping head plate (24) form a high-pressure rodless cavity (36) and a high-pressure rod cavity (37), the high-pressure rodless cavity (36) is connected with a power unit (26) through a control switch (47), and the high-pressure rod cavity (37) is connected with the power unit (26) through a control switch (46); the movable mould plate (20), the pressurizing plate (21) and the die closing head plate (24) are arranged on the supporting platform (19), the tie bar (16) is arranged on the die closing head plate (24), and the movable mould plate (20) can axially move along the tie bar (16).
2. A chemical micro-foaming injection molding apparatus according to claim 1, wherein: the melt adhesive injection mechanism (1 b) comprises a plasticizing motor (1), an injection platform movable plate (2), an injection adhesive pressure cylinder (1 d), an injection platform front plate (5), a hopper (6), a melt adhesive cylinder (7), an injection molding screw (8), an injection shifting device (9) and a melt pressure sensor (10), wherein the front end of the melt adhesive cylinder (7) is inserted and positioned in a die closing head plate (24), the rear end of the melt adhesive cylinder is movably positioned on a supporting platform (19) through the injection platform front plate (5), the injection platform movable plate (2) is movably positioned on the supporting platform (19) at the rear side of the injection platform front plate (5), the plasticizing motor (1) is arranged on the injection platform movable plate (2), the injection molding screw (8) is inserted and positioned in the melt adhesive cylinder (7), the rear end of the injection molding screw is connected with the plasticizing motor (1) on the injection platform movable plate (2), and the injection platform movable plate (2) is connected with the injection platform front plate (5) through the injection adhesive pressure cylinder (1 d).
3. A chemical micro-foaming injection molding apparatus according to claim 1, wherein: an adjusting limiting block (22) is arranged on the die closing plate (24), and the distance between the adjusting limiting block (22) and the pressurizing plate (21) is delta L.
4. The chemical micro-foaming injection molding equipment according to claim 1, further comprising a front mold (38), a rear mold (41), an induction magnetic ring (39) and a non-contact electronic ruler (40), wherein the non-contact electronic ruler (40) is fixed on the rear mold (41), the rear mold (41) is fixed on the movable mold plate (20), the induction magnetic ring (39) is fixed on the front mold (38), the front mold (38) is fixed on the pressurizing plate (21), and the non-contact electronic ruler (40) is connected with the control system (27).
5. A chemical micro-foaming injection molding apparatus according to claim 1, wherein: the glue injection head (12) is provided with a melt pressure sensor (10), a sealing nozzle (13) and a static mixer (11).
6. A chemical micro-foaming injection molding apparatus according to claim 1, wherein: the die moving pressure cylinder (1 a) comprises a die moving pump (15) and a die moving pump core (14), the die moving pump core (14) is arranged in the die moving pump (15) to form a die moving rodless cavity (34) and a die moving rod cavity (35), the die moving pump (15) is fixed on a die closing plate (24), the die moving pump core (14) is fixed on a movable die plate (20) through a connecting plate (17), the die moving rodless cavity (34) is connected with a power unit (25) through a control switch (45), and the die moving rod cavity (35) is connected with the power unit (25) through a control switch (44).
7. A chemical micro-foaming injection molding apparatus according to claim 1, wherein: the tie bar (16) and the band-type brake plate (18) are provided with annular grooves which can be mutually meshed.
8. A chemical micro-foaming injection molding apparatus according to claim 1, wherein: the device also comprises a control system (27) and control switches (42, 43, 44, 45, 46, 47, 48, 49, 50, 51), a power unit (25) and a power unit (26) which are in control connection, and is also connected with a sealing nozzle (13), a melt pressure sensor (10) and a plasticizing motor (1).
9. A chemical micro-foaming injection molding apparatus according to claim 2, wherein: the glue injection pressure cylinder (1 d) comprises a glue injection pump (4) and a glue injection pump core (3) in the glue injection pump (4), the glue injection pump (4) is arranged in a front plate (5) of a glue injection table, the output end of the glue injection pump core (3) is connected with a movable plate (2) of the glue injection table, the glue injection pump core (3) and the glue injection pump (4) form a glue injection rod cavity (30) and a glue injection rod-free cavity (31), the glue injection rod cavity (30) is connected with an energy accumulator (29) through a control switch (50), and meanwhile, the glue injection rod-free cavity (31) is connected with a power unit (26) through a control switch (48).
10. A chemical micro-foaming injection molding apparatus according to claim 2 or 9, characterized in that: the shooting table front plate (5) and the shooting table movable plate (2) are arranged on a shooting table base plate (28) and can axially move along the shooting table base plate (28), and the shooting table base plate (28) is fixed on the supporting platform (19).
11. A chemical micro-foaming injection molding apparatus as claimed in claim 6, wherein: the power unit (25) is connected with the band-type brake linkage device (52) through the control switch (42) and the control switch (43).
12. A chemical micro-foaming injection molding apparatus according to claim 4 or 8 or 9, characterized in that: the power unit (26) is also connected with an accumulator (29) which is connected with the accumulator through a control switch (49).
13. A chemical micro-foaming injection molding process is characterized in that: foaming with the chemical micro-foaming injection molding apparatus of any one of claims 1 to 12, comprising the steps of: plasticizing plastic raw materials and a foaming agent into molten rubber and small bubbles in a glue melting process, and keeping a certain melting pressure of the molten rubber in a glue melting cylinder to prevent the small bubbles from being decomposed into large bubbles; step two, a die assembly procedure, wherein a rear die (41) is attached to the front die (38) to form a high-pressure die; step three, injecting glue, namely after high-pressure die closing is completed, rapidly injecting molten glue into a die cavity of a die, and step four, foaming, namely slightly opening the front die and the rear die for a certain distance to release the pressure in the die cavity, wherein small bubbles in a semi-finished product are further expanded into large bubbles; and step five, a mold opening process is carried out, and a foaming product with uniform and compact gas distribution is obtained.
14. The chemical micro-foaming injection molding process according to claim 13, wherein: the method comprises the following steps:
step one, a melt adhesive procedure, namely decomposing Cheng Rongrong rubber material (53) and small bubbles (54) in a melt adhesive cylinder (7) through an injection molding screw (8) by using a plastic raw material (32) and a foaming agent (33), and simultaneously ensuring a certain pressure value in the melt adhesive material (53) to prevent the small bubbles (54) from decomposing and amplifying;
Step two, a mold closing process, namely moving the movable mold plate (20) and the rear mold (41) towards the front mold (38), and closing the band-type brake plate (18) to hold the tie bar (16) when the rear mold (41) is attached to the front mold (38); further, the high-pressure die is pressed, the high-pressure pumping core (23) pushes the pressurizing plate (21) to drive the front die (38) to be tightly attached to the rear die (41), the high-pressure die force is generated by the system, and the rear tooth surface of the ring groove of the holding flashboard (18) is tightly attached to the rear tooth surface of the ring groove of the tie bar (16);
step three, a glue injection procedure, namely, after the molten glue material (53) and the small bubbles (54) are further mixed by a static mixer (11), the mixture is injected into a die cavity formed by a rear die (41) and a front die (38) at a high speed, and the die cavity is quickly filled;
step four, a foaming process, namely driving a pressurizing plate (21) by a high-pressure pump core (23) to enable a front die (38) to leave a rear die (41) for a small distance delta L', wherein small bubbles (54) in a semi-finished product expand into large bubbles (55) due to the fact that the die cavity pressure is reduced after the die is slightly opened;
step five, a mold opening procedure is carried out, after cooling is finished, the shaping of the semi-finished product wrapped with the air bubbles is finished, and the band-type brake plate (18) and the tie bar (16) are separated; the movable die plate (20) and the rear die (41) move away from the front die (38) to obtain a complete foaming product (56).
15. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the first step, when the melt adhesive is melted, a sealing nozzle (13) is closed, a plasticizing motor (1) drives an injection molding screw (8) to rotate, a plastic raw material (32) and a foaming agent (33) are decomposed into Cheng Rongrong adhesive (53) and small bubbles (54) in a melt adhesive cylinder (7) through the injection molding screw (8), hydraulic oil is naturally sucked into an adhesive injection rodless cavity (31) from a power unit (26) through a control switch (48), hydraulic oil in an adhesive injection rod cavity (30) flows back to the power unit (26) through a control switch (51), the injection molding screw (8) is retreated, meanwhile, the control switch (51) is adjusted, a certain pressure value in the molten adhesive (53) is ensured, the decomposition and amplification of the small bubbles (54) are prevented, and the pressure value of the molten adhesive (53) can be read out through a solution pressure sensor (10); the power unit (26) also charges the accumulator (29) with high-pressure hydraulic oil by means of a control switch (49).
16. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the second step, the control switch (42) is opened, and hydraulic oil enters the band-type brake linkage device (52) from the power unit (25) so that the band-type brake plate (18) and the tie bar (16) are separated; hydraulic oil enters the movable mould rod cavity (35) from the power unit (25) through the control switch (44), and flows back to the power unit (25) from the movable mould rod-free cavity (34) through the control switch (45), and at the moment, the movable mould plate (20) and the rear mould (41) are driven by the movable mould core (14) to move towards the front mould (38).
17. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the third step, when the rear die (41) is attached to the front die (38), the non-contact electronic ruler (40) passes through the induction magnetic ring (39); hydraulic oil enters the band-type brake linkage device (52) from the power unit (25) through the control switch (43), so that the band-type brake plate (18) is folded to hold the tie bar (16).
18. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the second step, high-pressure hydraulic oil enters the high-pressure rodless cavity (36) from the power unit (26) through the control switch (47), the hydraulic oil in the high-pressure rodless cavity (37) flows back to the power unit (26) through the control switch (46), the high-pressure pumping core (23) pushes the pressurizing plate (21) to drive the front die (38) to be tightly attached to the rear die (41), at the moment, the system plays the high-pressure die pressing force, and the rear tooth surface of the ring groove of the holding flashboard (18) is tightly attached to the rear tooth surface of the ring groove of the tie bar (16).
19. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the third step, when injecting glue, the sealing nozzle (13) is opened, high-pressure hydraulic oil of the energy accumulator (29) enters the glue injecting rod cavity (30) through the control switch (50), and the hydraulic oil flows back to the power unit (26) from the glue injecting rod-free cavity (31) through the control switch (48), and the molten glue (53) and the small bubbles (54) are injected into a die cavity formed by the rear die (41) and the front die (38) at a high speed after being further mixed through the static mixer (11);
20. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the third step, after the molten sizing material (53) and the small bubbles (54) are filled in the die cavity rapidly, the sealing nozzle is closed, high-pressure hydraulic oil enters the moving die rodless cavity (34) from the power unit (25) through the control switch (45), and the hydraulic oil flows back to the power unit (25) from the moving die rodless cavity (35) through the control switch (44), so that the rear tooth surface of the ring groove of the band-type brake plate (18) is continuously clung to the rear tooth surface of the ring groove of the tie bar (16);
21. a chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the fourth step, high-pressure hydraulic oil enters the high-pressure rod cavity (37) from the power unit (26) through the control switch (46), and flows back to the power unit (26) from the high-pressure rod-free cavity (36) through the control switch (47), the high-pressure pump core (23) drives the pressurizing plate (21) to enable the front die (38) to leave the rear die (41) for a small distance delta L ', the non-contact electronic ruler (40) detects the delta L' through the induction magnetic ring (39), and at the moment, small bubbles (54) in the semi-finished product expand into large bubbles (55) due to the fact that the pressure of the die cavity is reduced after the die is slightly opened.
22. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the fourth step, the high-pressure pumping core (23) drives the pressurizing plate (21) to retract and cling to the adjusting limiting block (22), at the moment, the distance between the front die (38) and the rear die (41) is delta L, which is the same as the distance delta L between the front pressurizing plate (21) and the adjusting limiting block (22), meanwhile, the non-contact electronic ruler (40) detects delta L through the induction magnetic ring (39), and at the moment, small bubbles (54) in the semi-finished product swell into large bubbles (55) because of the pressure reduction of the die cavity after die opening.
23. A chemical micro-foaming injection molding process according to claim 13 or 14, characterized in that: in the fifth step, after cooling is finished, shaping of the semi-finished product wrapping the air bubbles is finished, a control switch (42) is opened, hydraulic oil enters a band-type brake linkage device (52) from a power unit (25) so that a band-type brake plate (18) and a tie bar (16) are separated; hydraulic oil enters the movable mould rodless cavity (34) from the power unit (25) through the control switch (45), meanwhile, the hydraulic oil flows back to the power unit (25) from the movable mould rod cavity (35) through the control switch (44), and the movable mould core (14) drives the movable mould plate (20) and the rear mould (41) to move in the direction away from the front mould (38) so as to obtain a complete foaming product (56).
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| CN109955423B (en) * | 2019-04-30 | 2024-04-02 | 广东奔迪新材料科技有限公司 | Large-scale ultrahigh-pressure thermoplastic polymer foaming molding device and method |
| CN111421758A (en) * | 2020-04-30 | 2020-07-17 | 贵州省材料产业技术研究院 | High-precision foaming product injection molding method and injection molding machine |
| CN112936779A (en) * | 2021-01-25 | 2021-06-11 | 戚秀华 | Compression injection device of injection molding machine |
| CN115071082B (en) * | 2022-04-29 | 2023-09-19 | 宁波长飞亚塑料机械制造有限公司 | Micro-die opening system for realizing correlation injection molding machine and control method thereof |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1119991A (en) * | 1997-06-27 | 1999-01-26 | Toyo Mach & Metal Co Ltd | Injection molding machine |
| WO2002090085A2 (en) * | 2001-05-04 | 2002-11-14 | Trexel, Inc. | Injection molding systems and methods |
| CN1864981A (en) * | 2004-12-28 | 2006-11-22 | 约伯佛克斯·难得怀德股份有限公司 | Method for controlling microscopic bubble nucleation in fluid polymer material production and its apparatus |
| CN1960844A (en) * | 2004-07-26 | 2007-05-09 | 宇部兴产机械株式会社 | Method for injection expansion molding of thermoplastic resin |
| CN101011850A (en) * | 2007-02-01 | 2007-08-08 | 东华机械有限公司 | Chemical foaming prepressing high speed injection molding method |
| JP2007210125A (en) * | 2006-02-07 | 2007-08-23 | Sumitomo Heavy Ind Ltd | Operation system of molding machine and operation method of molding machine |
| JP2008055693A (en) * | 2006-08-30 | 2008-03-13 | Mitsubishi Heavy Industries Plastic Technology Co Ltd | Injection foam molding machine and injection foam molding method |
| CN101746014A (en) * | 2008-12-08 | 2010-06-23 | 北京化工大学 | Micro-foam injection molding machine and molding process thereof |
| CN201970442U (en) * | 2010-12-13 | 2011-09-14 | 韶关亿利达机械有限公司 | Rotating preventing structure of tie bar and die locking head plate of injection molding machine |
| CN102320115A (en) * | 2011-04-19 | 2012-01-18 | 北京化工大学 | Online quality detecting method and device for micro-foamed injection molded product |
| CN102470592A (en) * | 2009-09-30 | 2012-05-23 | 三菱重工塑胶科技有限公司 | Foam injection molding machine |
| CN103608158A (en) * | 2011-01-27 | 2014-02-26 | 新平衡运动鞋公司 | Injection molding systems and methods for forming materials used in footwear and materials manufactured by said systems and methods |
| CN103600473A (en) * | 2013-11-27 | 2014-02-26 | 福州大学 | Forming device and forming method of microporous foam plastic |
| CN203579989U (en) * | 2013-08-02 | 2014-05-07 | 上海飞尔汽配有限公司 | Automobile seat backboard micro-foaming molding device |
| CN104859087A (en) * | 2015-04-20 | 2015-08-26 | 北京化工大学 | Electro-hydraulic compound super-speed energy-saving injection molding machine |
| CN106113425A (en) * | 2016-06-24 | 2016-11-16 | 海天塑机集团有限公司 | Fretting map mechanical position limitation mechanism |
| CN208438680U (en) * | 2017-12-28 | 2019-01-29 | 东华机械有限公司 | A kind of chemistry fretting map injection-moulding device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002090085A1 (en) * | 2001-05-04 | 2002-11-14 | Trexel Inc | Injection molding systems and methods |
| KR100919690B1 (en) * | 2002-02-28 | 2009-10-01 | 우베 고산 기카이 가부시키가이샤 | Method for expansion injection molding |
-
2017
- 2017-12-28 CN CN201711457658.5A patent/CN108000823B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1119991A (en) * | 1997-06-27 | 1999-01-26 | Toyo Mach & Metal Co Ltd | Injection molding machine |
| WO2002090085A2 (en) * | 2001-05-04 | 2002-11-14 | Trexel, Inc. | Injection molding systems and methods |
| CN1960844A (en) * | 2004-07-26 | 2007-05-09 | 宇部兴产机械株式会社 | Method for injection expansion molding of thermoplastic resin |
| CN1864981A (en) * | 2004-12-28 | 2006-11-22 | 约伯佛克斯·难得怀德股份有限公司 | Method for controlling microscopic bubble nucleation in fluid polymer material production and its apparatus |
| JP2007210125A (en) * | 2006-02-07 | 2007-08-23 | Sumitomo Heavy Ind Ltd | Operation system of molding machine and operation method of molding machine |
| JP2008055693A (en) * | 2006-08-30 | 2008-03-13 | Mitsubishi Heavy Industries Plastic Technology Co Ltd | Injection foam molding machine and injection foam molding method |
| CN101011850A (en) * | 2007-02-01 | 2007-08-08 | 东华机械有限公司 | Chemical foaming prepressing high speed injection molding method |
| CN101746014A (en) * | 2008-12-08 | 2010-06-23 | 北京化工大学 | Micro-foam injection molding machine and molding process thereof |
| CN102470592A (en) * | 2009-09-30 | 2012-05-23 | 三菱重工塑胶科技有限公司 | Foam injection molding machine |
| CN201970442U (en) * | 2010-12-13 | 2011-09-14 | 韶关亿利达机械有限公司 | Rotating preventing structure of tie bar and die locking head plate of injection molding machine |
| CN103608158A (en) * | 2011-01-27 | 2014-02-26 | 新平衡运动鞋公司 | Injection molding systems and methods for forming materials used in footwear and materials manufactured by said systems and methods |
| CN102320115A (en) * | 2011-04-19 | 2012-01-18 | 北京化工大学 | Online quality detecting method and device for micro-foamed injection molded product |
| CN203579989U (en) * | 2013-08-02 | 2014-05-07 | 上海飞尔汽配有限公司 | Automobile seat backboard micro-foaming molding device |
| CN103600473A (en) * | 2013-11-27 | 2014-02-26 | 福州大学 | Forming device and forming method of microporous foam plastic |
| CN104859087A (en) * | 2015-04-20 | 2015-08-26 | 北京化工大学 | Electro-hydraulic compound super-speed energy-saving injection molding machine |
| CN106113425A (en) * | 2016-06-24 | 2016-11-16 | 海天塑机集团有限公司 | Fretting map mechanical position limitation mechanism |
| CN208438680U (en) * | 2017-12-28 | 2019-01-29 | 东华机械有限公司 | A kind of chemistry fretting map injection-moulding device |
Non-Patent Citations (2)
| Title |
|---|
| 二板式注塑机微开技术在发泡注射成型中的应用;阮剑波;俞诤;郑海伟;胡安驰;;塑料(第03期);第95-97页 * |
| 微发泡注塑成型设备的改造;马俊彪;;农机使用与维修(第03期);第146-147页 * |
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