CN101356044A - Method and apparatus for extrusion injection molding - Google Patents

Method and apparatus for extrusion injection molding Download PDF

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Publication number
CN101356044A
CN101356044A CNA2005800523145A CN200580052314A CN101356044A CN 101356044 A CN101356044 A CN 101356044A CN A2005800523145 A CNA2005800523145 A CN A2005800523145A CN 200580052314 A CN200580052314 A CN 200580052314A CN 101356044 A CN101356044 A CN 101356044A
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CN
China
Prior art keywords
mould
equipment
sectional area
chamber
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2005800523145A
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Chinese (zh)
Inventor
李庆法
明宪·约翰·杨
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Agency for Science Technology and Research Singapore
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Agency for Science Technology and Research Singapore
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Filing date
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Publication of CN101356044A publication Critical patent/CN101356044A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/24—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by reciprocating plunger
    • 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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/221—Extrusion presses; Dies therefor extrusion dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/26—Extrusion presses; Dies therefor using press rams
    • 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
    • B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
    • 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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

Abstract

Apparatus (10) for extrusion injection forming of an article in a cavity (22) of a mould using a material, the apparatus (10) comprising an extrusion head (16) able to be operatively connected to the mould (12); the extrusion head (16) comprising an inlet (36), an outlet passage (42) operatively connected to the inlet (36) and an outlet opening (44) at a end of the outlet passage (42) and remote from the inlet (36); the outlet passage (42) being of a length and cross- sectional area for passage therealong of the material such that material flow is unidirectional, and for outlet of the material through the outlet opening (42) with substantially uniform pressure over the cross-sectional area.

Description

The method and apparatus that is used for extrusion injection molding
Technical field
The present invention relates to be used for the method and apparatus of extrusion injection molding, and particularly but and not exclusively relate to such method and apparatus that is used for formed ceramic article.
Background technology
It is continuous, the commercialization manufacturing process that is used to make earthenware and other bigger hollow part that room temperature single/double screw is extruded.Initiation material is the mixture of ceramic powders and water-based adhesive.This mixture is formed required shape by extruding subsequently.Then, the parts of extruding are removed adhesive 900 ℃ to 1000 ℃ following heat afterwards by baking oven or air drying.Then, the sintering under 1400 ℃ to 1700 ℃ high temperature of the parts through removing adhesive.
Room temperature plunger is extruded and only is used for earthenware in batches and other bigger parts.This technology is extruded identical with list/twin-screw except forming process.In this technology, mixture at first is added to extruding cavity, evacuation of air then.After emptying, plunger is pushed out material from the mouth mould, to form required shape.
But for high accuracy, bigger and member complexity, product yield is always very low.Therefore, need complicated and expensive secondary operations.All these make this technology become expensive manufacturing process, and to be considered to regard to " life " (before drying) parts-moulding be one of the most cheap manufacturing process although extrude.
The refractory ceramics expressing technique that does not also have the mixture of business-like use powder and polymer adhesive.
Up-to-date business-like refractory ceramics is extruded and is to use semi-solid refractory ceramics expressing technique.In this technology, initiation material is the mixture of low-melting glass and ceramic powders, and extrudes being higher than under 600 ℃ the temperature and carry out.
High temperature is extruded and be can be used for aluminium and other metal and alloy.This method is a discontinuous method, and the power of extruding is from hydraulic plunger.Temperature is higher than 500 ℃.
Powder injection-molded the mobile of feed that utilize forms complicated shape via injection moulding.Then, will give birth to parts and remove adhesive, and at high temperature by particle diffusion technique sintering.
This technology is suitable for making a large amount of little metal, pottery and carbide material with complex geometric shapes.
But for the product such as thin ceramic tubes, this manufacturing process can not can not be produced this specific ceramic tube products with low-cost high finished product rate production.
Summary of the invention
According to the of the present invention first preferred aspect, a kind of equipment of material at the chamber of mould extrusion injection molding goods that is used for utilizing is provided, described equipment comprises the extruder head that can effectively be connected to described mould, described extruder head comprises inlet, effectively be connected to the exit passageway and the exit opening of described inlet, described exit opening is in the end of described exit passageway and away from described inlet, the length of described exit passageway and cross-sectional area make described material described material flow be unidirectional situation lower edge its flow through, and make described material under the situation that has basic pressure uniformly on the described cross-sectional area, flow out by described exit opening.
The cross-sectional area in the cross-sectional area of described exit opening, size and dimension and described chamber, size and dimension basically identical.
According to the of the present invention second preferred aspect, a kind of equipment of material at the chamber of mould extrusion injection molding goods that is used for utilizing is provided, described equipment comprises the extruder head that can effectively be connected to described mould, described extruder head comprises inlet, effectively is connected to the exit passageway and the exit opening of described inlet, described exit passageway is used for described material along its passage that passes through, the cross-sectional area in the cross-sectional area of described exit opening, size and dimension and described chamber, size and dimension basically identical.
According to the preferred third aspect of the present invention, a kind of method of material at the chamber of mould extrusion injection molding goods that be used for utilizing is provided, described method comprises:
(a) described material is fed to the extruder head that effectively is connected to described mould, described extruder head comprises inlet, effectively is connected to the exit passageway and the exit opening of described inlet, and described exit opening is in the end of described exit passageway and away from described inlet;
(b) utilize actuator that described material is pushed through in the described exit passageway, so that described material described material flow be unidirectional situation lower edge its flow through, and make described material under the situation that has basic pressure uniformly on the described cross-sectional area of described exit passageway, flow out by described exit opening.
For above-mentioned all aspects, what the cross-sectional area of described exit passageway, size and dimension can be with described exit openings is identical.Described extruder head can also comprise hollow inside, and described hollow inside is included in described material and enters the pressure reservoir that described exit passageway is used for described material before.Described extruder head can be used for described material is expelled to described die cavity, with the described goods of moulding.The place can not have nozzle at described exit opening.The thick long ratio of described goods is in 1: 500 scope, preferably in the scope of 1: 300 (thickness is than length).Described goods can be ceramic materials, and described material comprises at least a polymer adhesive and the powder that is used to form ceramic material, thereby form the thickener of range of viscosities at 50-100Pas.Described extruder head can also comprise actuator, described actuator be selected from the group that constitutes by screw actuator and cam one of at least.Described mould can utilize clamping plate to clamp.Described clamping plate and described mould can be independently, and perhaps described clamping plate and described mould can be one.Described clamping plate can be along being selected from moving of following direction: be parallel to the longitudinal axis in described chamber, perpendicular to the longitudinal axis in described chamber, and be parallel to the longitudinal axis in described chamber and perpendicular to the longitudinal axis in described chamber.
Description of drawings
Also easy to implement for the present invention can be understood fully, will the preferred embodiments of the present invention only be described in the mode of non-illustrative examples now, description is carried out with reference to accompanying drawing.
In the accompanying drawings:
Fig. 1 is the perspective view of first preferred embodiment;
Fig. 2 is the vertical sectional view along the direction of line on Fig. 1 and arrow 2-2;
But Fig. 3 is corresponding to Fig. 2's is the cutaway view of second preferred embodiment;
But Fig. 4 is corresponding to Fig. 2's is the cutaway view of second preferred embodiment;
Fig. 5 is the perspective view of the 4th preferred embodiment;
Fig. 6 is the vertical sectional view of the 4th preferred embodiment of Fig. 5;
Fig. 7 is the perspective view that can utilize the product that the embodiment of Fig. 1-6 makes;
Fig. 8 can utilize Fig. 1-6, perhaps the perspective view of the pipe product made of Fig. 9 and 10 embodiment;
Fig. 9 is the perspective view of preferred embodiment of mold system that is used for the product of moulding Fig. 8; And
Figure 10 shows a series of presentation graphs of mould of Fig. 9 of the releasing process that utilizes the extrusion injection molding device.
The specific embodiment
With reference to Fig. 1 and 2, show the equipment 10 of the extrusion injection molding that is used for the goods (not shown).Equipment 10 comprises mould 12, mold cores 14, extruder head 16 and by the material sources of 18 general expressions.
Mould 12 has wall 20 and chamber 22, and its size and dimension is suitable for forming the outer shape and the wall of the goods that will be formed.In order to form the interior shape of goods, mold cores 14 is placed in the chamber 22 in a usual manner.Mold cores 14 has: main body 24, and it has required length, size and dimension; 26, the outer end that it is positioned at main body 24 is used for when mold cores 14 correctly is arranged in chamber 22 end wall 28 against mould 12.
Fig. 3 shows wherein, and actuator 38 is second embodiment of the combination of screw actuator 46 and cam 48.Go out as shown, inlet 36 and exit passageway 42 align vertically.Therefore, exit passageway 42 and part 40 are one substantially.In addition, the cross-sectional area of part 40 is greater than the cross-sectional area in chamber 22.
It is the 3rd embodiment that had not only carried out function of measuring but also carried out the screw actuator 46 of function of injection that Fig. 4 shows actuator wherein.Material is by conventional injection moulding hopper supply.Material is pushed through in the exit passageway 42 vertically by metering and injection actuator screw 46 since then.Can use clamping plate 50 to fix mould 12.Perhaps, as shown in the figure, clamping plate 50 and mould 12 are by integrated, so they become same parts.In the clamping plate 50 one or two can move with respect to mould 12 (if they be independently parts) and forming tube 16.Moving can be (longitudinal axis that is parallel to chamber 22) of vertical (perpendicular to the longitudinal axis in chamber 22) and/or level.If plate 50 and mould 12 are same parts, then can clamp by two plates 50/12.Plate 50 can be along moving perpendicular to the longitudinal axis of mold cores 14/ die cavity 22 and/or the direction that is parallel to the longitudinal axis of mold cores 14/ die cavity 22.Present embodiment is suitable for making the pipe with 500mm or bigger length.
Fig. 5 and Fig. 6 show the preferred form of extruder head 16.Similar among extruder head 16 and Fig. 1-Fig. 4, difference is that exit passageway 42 is longer.Like this, obtain to be used to produce the exit passageway of the mobile length of unidirectional nonturbulent flow, on the cross-sectional area of exit passageway 42, obtain uniform pressure distribution simultaneously.Equally, the cross-sectional area of exit opening 44, size and dimension are identical with chamber 22 and exit passageway 42.
Fig. 7 shows the example of the product 52 of the embodiment manufacturing that utilizes Fig. 1-5, and is the earthenware that can be used for for example gas separation, micro-filtration and nanofiltration.
Fig. 8 shows other product 54, and Fig. 9 and 10 is used for its forming mould system 56.Product 54 utilizes to be made with reference to the improved a little form of Fig. 5 and 6 described extruder heads 16.It is similar to the embodiment of Fig. 5 and 6, but difference is size and employed shaped device.Mold system 56 (not illustrating among the figure) has mould 12 and mold cores 14.Also be provided with backing-out punch 58 and fixed die 60.Backing-out punch 58 has jut 62, and the shape and size of jut 62 are corresponding with height, thickness and the shape of product 54.When moulding finished, mold cores 14 was removed (Figure 10 a), and mould be opened (Figure 10 b).Backing-out punch 58 moves towards mould 12, and jut 62 enters mould 12 by opening 64, and product 54 is ejected (Figure 10 c) from mould 12.
Extruder head 16 can be modified to other shape, as shown in Figure 8.Inlet is equivalent to the hollow inside 34 among Fig. 6, and running channel is equivalent to the material storage area 42 among Fig. 6, and the doorway is equivalent to export 44.Gate size can be a same size, perhaps can be slightly little, and to improve the life-span in chamber.
When being used for ceramic product, material will comprise ceramic material (comprising metal), the thickener of the pre-mixed material of adhesive (such as polymer adhesive) and liquid as required.The mixing ratio of powder and adhesive is consistent with powder injection-molded (PIM) feed of standard, but preferably, viscosity be in 50-120Pas normal ranges than downside.
In addition, feed preferably is preheating to about 180 ℃, and actual temperature depends on employed polymer adhesive.Mould 12 also preferably is heated to for example about 160 ℃ to 170 ℃, and mould 12 is used as a zone heating simultaneously.When moulding was finished, mould 12 can be cooled for example about 120-160 ℃, so that take out shaped article.
Product 52,54 can have 1-500, and the thick length of preferred 1-300 is than (the wall ratio length of pipe).For pipe or the width of product without limits, its upper limit depends on the ability of employed device.
Although in aforementioned description, described the preferred embodiments of the present invention, it will be understood by those skilled in the art that and to carry out many variations or modification to the details of design or structure without departing from the scope of the invention.

Claims (24)

1. one kind is used for utilizing the equipment of material at the chamber of mould extrusion injection molding goods, described equipment comprises the extruder head that can effectively be connected to described mould, described extruder head comprises inlet, effectively be connected to the exit passageway and the exit opening of described inlet, described exit opening is in the end of described exit passageway and away from described inlet, the length of described exit passageway and cross-sectional area make described material described material flow be unidirectional situation lower edge its flow through, and make described material under the situation that has basic pressure uniformly on the described cross-sectional area, flow out by described exit opening.
2. equipment as claimed in claim 1, the cross-sectional area in the cross-sectional area of wherein said exit opening, size and dimension and described chamber, size and dimension basically identical.
3. one kind is used for utilizing the equipment of material at the chamber of mould extrusion injection molding goods, described equipment comprises the extruder head that can effectively be connected to described mould, described extruder head comprises inlet, effectively is connected to the exit passageway and the exit opening of described inlet, described exit passageway is used for described material along its passage that passes through, the cross-sectional area in the cross-sectional area of described exit opening, size and dimension and described chamber, size and dimension basically identical.
4. as claim 2 or the described equipment of claim 3, the cross-sectional area of wherein said exit passageway, size and dimension are identical with described exit opening.
5. as any one described equipment among the claim 1-4, wherein said extruder head also comprises hollow inside, and described hollow inside is included in described material and enters the pressure reservoir that described exit passageway is used for described material before.
6. as any one described equipment among the claim 1-5, wherein said extruder head is used for described material is expelled to described die cavity, with the described goods of moulding.
7. as any one described equipment among the claim 1-6, the thick length of wherein said goods than (the wall ratio length of pipe) in 1: 500 scope.
8. as any one described equipment among the claim 1-7, the thick length of wherein said goods than (the wall ratio length of pipe) in 1: 300 scope.
9. as any one described equipment among the claim 1-8, wherein said goods are ceramic materials, and described material comprises at least a polymer adhesive and the powder that is used to form ceramic material, thereby form the thickener of range of viscosities at 50-100Pas.
10. as any one described equipment among the claim 1-9, wherein said extruder head also comprises actuator, described actuator be selected from the group that constitutes by screw actuator and cam one of at least.
11. as any one described equipment in the claim 10, wherein said actuator is used to carry out function of measuring and function of injection.
12. as any one described equipment among the claim 1-11, wherein said mould utilizes clamping plate to clamp.
13. equipment as claimed in claim 12, wherein said clamping plate and described mould are independently.
14. equipment as claimed in claim 12, wherein said clamping plate and described mould are one.
15. as any one described equipment among the claim 12-14, wherein said clamping plate can be along being selected from the longitudinal axis that is parallel to described chamber and moving perpendicular to the direction of the longitudinal axis in described chamber.
16. one kind is used for utilizing the method for material at the chamber of mould extrusion injection molding goods, described method comprises:
(a) described material is fed to the extruder head that effectively is connected to described mould, described extruder head comprises inlet, effectively is connected to the exit passageway and the exit opening of described inlet, and described exit opening is in the end of described exit passageway and away from described inlet;
(b) utilize actuator that described material is pushed through in the described exit passageway, so that described material described material flow be unidirectional situation lower edge its flow through, and make described material under the situation that has basic pressure uniformly on the described cross-sectional area of described exit passageway, flow out by described exit opening.
17. method as claimed in claim 16, the cross-sectional area in the cross-sectional area of wherein said exit opening, size and dimension and described chamber, size and dimension basically identical.
18. method as claimed in claim 17, the cross-sectional area of wherein said exit passageway, size and dimension are identical with described exit opening.
19., also be included in and be arranged on described material in the described extruder head and enter the pressure reservoir that is used for described material before the described exit passageway as any one described method among the claim 16-18.
20. as any one described method among the claim 16-19, wherein said material is expelled in the described die cavity by described extruder head.
21. as any one described method among the claim 16-20, wherein said mould utilizes clamping plate to clamp.
22. method as claimed in claim 21, wherein said clamping plate and described mould are independently.
23. method as claimed in claim 21, wherein said clamping plate and described mould are one.
24. as any one described method among the claim 21-23, wherein said clamping plate can be along being selected from moving of following direction: the longitudinal axis that is parallel to described chamber, perpendicular to the longitudinal axis in described chamber, and be parallel to the longitudinal axis in described chamber and perpendicular to the longitudinal axis in described chamber.
CNA2005800523145A 2005-12-13 2005-12-13 Method and apparatus for extrusion injection molding Pending CN101356044A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2005/000416 WO2007070005A1 (en) 2005-12-13 2005-12-13 Method and apparatus for extrusion injection forming

Publications (1)

Publication Number Publication Date
CN101356044A true CN101356044A (en) 2009-01-28

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EP (1) EP1960168A4 (en)
CN (1) CN101356044A (en)
WO (1) WO2007070005A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102555179A (en) * 2010-12-22 2012-07-11 住友重机械工业株式会社 Plasticizing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114750263B (en) * 2022-04-06 2023-11-07 康姆罗拉有限公司 Module for quartz ceramic production

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DD67782A (en) *
US1598201A (en) * 1923-05-25 1926-08-31 Railway & Industrial Eng Co Process of and apparatus for making articles of ceramic material
FR775003A (en) * 1933-06-14 1934-12-18 Process and device for the manufacture of high pressure pipes, sleeve or flange, seamless, of cement and asbestos or similar materials
DE1205879B (en) * 1961-07-26 1965-11-25 Jacques Bisch Method and mold for casting ceramic objects
JPH02102005A (en) * 1988-10-11 1990-04-13 Ngk Insulators Ltd Molding material purifier and ceramic molding method utilizing this purifier
DE19725265C2 (en) * 1997-06-13 2000-06-08 Helmut Knoblich Single or multi-part extrusion mouthpiece
US6261495B1 (en) * 1999-08-17 2001-07-17 Chip Coolers, Inc. Process of molding a polymer reinforced with particles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102555179A (en) * 2010-12-22 2012-07-11 住友重机械工业株式会社 Plasticizing device
CN102555179B (en) * 2010-12-22 2015-08-19 住友重机械工业株式会社 Plasticizing apparatus

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WO2007070005A1 (en) 2007-06-21
EP1960168A4 (en) 2009-08-05
EP1960168A1 (en) 2008-08-27

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Open date: 20090128