CN1824486A - Mould for water base pulp gel injection moulding - Google Patents
Mould for water base pulp gel injection moulding Download PDFInfo
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- CN1824486A CN1824486A CN 200610009887 CN200610009887A CN1824486A CN 1824486 A CN1824486 A CN 1824486A CN 200610009887 CN200610009887 CN 200610009887 CN 200610009887 A CN200610009887 A CN 200610009887A CN 1824486 A CN1824486 A CN 1824486A
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- mould
- injection moulding
- water base
- gel injection
- core rod
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Abstract
The present invention relates to a mould for implementing water base slurry gel injection moulding process. The present invention is characterized by that its core mould is composed of pressure cover and mould core, said mould core and said pressure cover are made into one body. Said mould core is mounted in internal cavity of external mould, said mould core and internal cavity of external mould are formed into an annular channel, the antisticking coating layer is respectively applied on the surface of mould core and internal cavity of external mould, the pressure cover is fixedly connected with the external mould, on the pressure cover is set a slurry inlet communicated with said annular channel. Said external mould is formed from two symmetrically-arranged half-moulds, the lower end of the external mould is placed in the seat cover.
Description
Technical field
The present invention relates to a kind of casting mould.
Background technology
Gel-casting method is a kind of effective ways of preparation Large Size Special Shaped thin wall type member (as antenna house etc.).In the gel casting forming process, need to use mould carrying slurry, obtain base substrate by the pulp gel reaction, the mould therefor material is generally metal, plastics etc. at present.Adopt metal material to make mould, exist the metal surface to be subjected to the corrosion of acid-alkali medium in the water-based slurry easily, after the pulp gelization base substrate easily and the metal surface stick together, cause base substrate demoulding difficulty, presentation quality is poor, yield rate is hanged down problem.Generally select for use high molecule plastic (as polyethylene, polytetrafluoroethylene (PTFE), the nylon etc.) material that is difficult for sticking together with water-based slurry to make mould in the process of the test, but for members such as moulding large-scale antenna covers, because mould therefor volume big (mould diameter, highly all more than 1m), thereby there is the manufacturing cost height, yielding problem under heating condition; Employing at metal material surface composite high-molecular plastics as the mould of making member such as antenna house, then exist mould production cost height, weight big, use inconvenient, be difficult to satisfy problem such as needs of production.
Summary of the invention
The objective of the invention is for solving existing water base pulp gel injection moulding, adopting metal material to make mould exists the metal surface to be subjected to the corrosion of acid-alkali medium in the water-based slurry easily, after the pulp gelization base substrate easily and the metal surface stick together, cause base substrate demoulding difficulty, presentation quality is poor, and yield rate is hanged down problem; Adopt high molecule plastic to make mould and have the manufacturing cost height, yielding problem under heating condition; Employing is at metal material surface composite high-molecular plastics, exist mould production cost height, weight big, use inconvenient problem and provide a kind ofly prevent base substrate and die surface adhesion, the easily demoulding, presentation quality is good, the mould for water base pulp gel injection moulding that yield rate is high.
The present invention includes external mold and core; The present invention also comprises anti-stick coating and cover for seat; Described core is formed by gland with the core rod that gland is made one, described core rod is contained in the outer mold cavity, by core rod and outer mold cavity looping passage, described anti-stick coating is separately positioned on the surface of core rod and outer mold cavity, the thickness of anti-stick coating is δ, described gland is fixedlyed connected with external mold, gland is provided with the slurry import that communicates with described circular passage, the half module that external mold is placed by two symmetries is formed, the lower end of external mold is contained in the described cover for seat, and described external mold and core are made by graphite material respectively.
The present invention has following beneficial effect: one, adopt have easy to process, cost is low, be easy to use, can conveniently be processed into the graphite material of complex-shaped member as die main body of the present invention, and the surface of mold cavity and the core surface of core are provided with anti-stick coating outside, when the demoulding, can avoid base substrate and external mold surface of internal cavity and core surface adhesion, thereby guaranteed the presentation quality of base substrate, and be beneficial to the demoulding, also greatly reduce mold weight and production cost simultaneously.Two, the half module that adopts two symmetries to place is formed the external mold that can conveniently take apart, make up, and the external mold and the core rod of this structure are used in combination, and make the base substrate demoulding convenient, easy, and presentation quality is good after the base substrate demoulding.Three, the lower end with external mold is contained in the cover for seat, to the passive while of external mold, also can play the effect fastening to external mold.Four, the present invention have that base substrate demoulding quality is good, production cost is low, the advantage of in light weight, easy to use, handling ease, can be widely used in complex-shaped and pulp gel injection moulding cavity thin-walled ceramic component base substrate, be particularly suitable for preparing the base substrate of member such as high-quality large-size antennae cover.
Description of drawings
Fig. 1 is overall structure master's pseudosection of the present invention, and Fig. 2 is the A-A cutaway view of Fig. 1, and Fig. 3 is the B portion enlarged drawing of Fig. 1.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1～Fig. 3 present embodiment is described, present embodiment is made up of external mold, core, anti-stick coating 4 and cover for seat 5; Described core is formed by gland 2-1 with core rod 2-2 that gland 2-1 makes one, described core rod 2-2 is contained in the outer mold cavity, by core rod 2-2 and outer mold cavity looping passage 3, described anti-stick coating 4 is separately positioned on the surface of core rod 2-2 and outer mold cavity, described gland 2-1 is fixedlyed connected with external mold, gland 2-1 is provided with the slurry import 2-3 that communicates with described circular passage 3, the half module 1-1 that external mold is placed by two symmetries forms, the lower end of external mold is contained in the described cover for seat 5, the outer face of external mold is cylinder 1-3, and external mold and core are made by graphite material respectively.
In the present embodiment, external mold thinnest part thickness is not less than 5mm, and the thickness of gland 2-1 is 5mm, also can be according to the shape of mold cavity and the shape of core rod 2-2 outside the shaped design of injection molding blank; The thickness δ of the anti-stick coating 4 in the present embodiment is 200 μ m, and anti-stick coating 4 can also be selected other and each diversity macromolecular material of water for use.Graphite material avaivable electrode graphite, high purity graphite, high-strength graphite or big grain graphite can be selected as required.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, the difference of the present embodiment and the specific embodiment one is: the core rod 2-2 of present embodiment and described outer mold cavity are respectively bullet shape, core rod 2-2 is contained in the outer mold cavity, and the circular passage 3 that is made of core rod 2-2 and outer mold cavity is bullet shape.Adopt said structure, can satisfy the needs of making the ceramic radome workpiece.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1, the upper end of the external mold of present embodiment is provided with cylindrical bump 1-2, the lower end of described gland 2-1 is provided with the cylindrical bore 2-4 that matches with the cylindrical bump 1-2 of described external mold, the cylindrical bump 1-2 of external mold is contained among the cylindrical bore 2-4 of gland 2-1, and outer mold cavity is coaxial with described core rod 2-2.Adopt said structure, core and external mold are combined closely, thereby guaranteed that core and external mold are concentric.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment four: in conjunction with Fig. 1, Fig. 2 present embodiment is described, the difference of the present embodiment and the specific embodiment one is: the slurry import 2-3 of the core upper end of present embodiment is the circular hole 2-5 that is uniformly distributed along the circumference.Adopt said structure, when making things convenient for slurry to inject, slurry is injected in the circular passage 3 equably.
The specific embodiment five: in conjunction with Fig. 1 present embodiment is described, the core rod 2-2 of present embodiment adopts solid construction.Can make things convenient for processing and manufacturing.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment six: present embodiment is described in conjunction with Fig. 1, Fig. 3, the difference of the present embodiment and the specific embodiment one is: the anti-stick coating 4 of present embodiment is made by the high molecule plastic material, and anti-stick coating 4 is separately positioned on the surface and external mold surface of internal cavity of core rod 2-2.Adopt high molecule plastic as anti-stick coating 4, can guarantee that blank is not bonding with surface and the external mold surface of internal cavity of core rod 2-2, be beneficial to the demoulding, also saved cost simultaneously.Anti-stick coating 4 adopts the high molecule plastic material, in gelation heating process (heating-up temperature is between 60～80 ℃), it is stable that the high molecule plastic rerum natura can keep, and it is not interacted with the base substrate of slurry and formation, guarantees that base substrate can not be subjected to the pollution of high molecule plastic.
In the present embodiment, the high molecule plastic that is adopted is a polyurethane plastics.
The specific embodiment seven: in conjunction with Fig. 3 present embodiment is described, the thickness δ of the anti-stick coating 4 of present embodiment is 50～500 μ m.Adopt the said structure parameter, can satisfy the needs of making difformity, size members blank.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment eight: in conjunction with Fig. 3 present embodiment is described, the difference of the present embodiment and the specific embodiment seven is: the thickness δ of the anti-stick coating 4 of present embodiment is 200～400 μ m.Adopt the said structure parameter, can satisfy the needs of making the bigger member blank of physical dimension.
The specific embodiment nine: in conjunction with Fig. 3 present embodiment is described, the difference of the present embodiment and the specific embodiment seven is: the thickness δ of the anti-stick coating 4 of present embodiment is 50 μ m.Can satisfy the needs of making minor structure size members blank.
The specific embodiment ten: in conjunction with Fig. 3 present embodiment is described, the difference of the present embodiment and the specific embodiment seven is: the thickness δ of the anti-stick coating 4 of present embodiment is 500 μ m.Can satisfy the needs of making macrostructure size members blank.
Claims (10)
1, a kind of mould for water base pulp gel injection moulding, its composition comprises external mold and core; It is characterized in that it also comprises anti-stick coating (4) and cover for seat (5); Described core is formed by gland (2-1) with the core rod (2-2) that gland (2-1) is made one, described core rod (2-2) is contained in the outer mold cavity, by core rod (2-2) and outer mold cavity looping passage (3), described anti-stick coating (4) is separately positioned on the surface of core rod (2-2) and outer mold cavity, the thickness of anti-stick coating (4) is δ, described gland (2-1) is fixedlyed connected with external mold, gland (2-1) is provided with the slurry import (2-3) that communicates with described circular passage (3), the half module (1-1) that external mold is placed by two symmetries is formed, the lower end of external mold is contained in the described cover for seat (5), and described external mold and core are made by graphite material respectively.
2, a kind of mould for water base pulp gel injection moulding according to claim 1, it is characterized in that described core rod (2-2) and described outer mold cavity are respectively bullet shape, core rod (2-2) is contained in the outer mold cavity, and the circular passage (3) that is made of core rod (2-2) and outer mold cavity is a bullet shape.
3, a kind of mould for water base pulp gel injection moulding according to claim 1, the upper end that it is characterized in that described external mold is provided with cylindrical bump (1-2), the lower end of described gland (2-1) is provided with the cylindrical bore (2-4) that matches with the cylindrical bump (1-2) of described external mold, the cylindrical bump of external mold (1-2) is contained in the cylindrical bore (2-4) of gland (2-1), and outer mold cavity is coaxial with described core rod (2-2).
4, a kind of mould for water base pulp gel injection moulding according to claim 1, the outer face that it is characterized in that described external mold are cylinder (1-3).
5, a kind of mould for water base pulp gel injection moulding according to claim 1 is characterized in that the slurry import (2-3) of described core upper end is the circular hole (2-5) that is uniformly distributed along the circumference.
6, a kind of mould for water base pulp gel injection moulding according to claim 1 is characterized in that described core rod (2-2) adopts solid construction.
7, a kind of mould for water base pulp gel injection moulding according to claim 1 is characterized in that described anti-stick coating (4) made by the high molecule plastic material.
8, a kind of mould for water base pulp gel injection moulding according to claim 7 is characterized in that described high molecule plastic material is a polyurethane plastics.
9, according to claim 1 or 7 described a kind of mould for water base pulp gel injection moulding, the thickness δ that it is characterized in that described anti-stick coating (4) is 50～500 μ m.
10, a kind of mould for water base pulp gel injection moulding according to claim 1 is characterized in that described graphite material is electrode graphite, high purity graphite, high-strength graphite or big grain graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100098876A CN100420564C (en) | 2006-03-31 | 2006-03-31 | Mould for water base pulp gel injection moulding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100098876A CN100420564C (en) | 2006-03-31 | 2006-03-31 | Mould for water base pulp gel injection moulding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1824486A true CN1824486A (en) | 2006-08-30 |
| CN100420564C CN100420564C (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100098876A Expired - Fee Related CN100420564C (en) | 2006-03-31 | 2006-03-31 | Mould for water base pulp gel injection moulding |
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| CN (1) | CN100420564C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106313276A (en) * | 2015-06-26 | 2017-01-11 | 汉能新材料科技有限公司 | Die for preparing large-size tubular green bodies through gel casting |
| CN106738590A (en) * | 2016-12-16 | 2017-05-31 | 浙江海峰制鞋设备有限公司 | A kind of pouring head overcoat for PU materials |
| CN106994759A (en) * | 2017-04-12 | 2017-08-01 | 北京科技大学 | A kind of ceramic impeller gel casting forming mould and its manufacture method |
| CN108274610A (en) * | 2018-01-30 | 2018-07-13 | 北京航大新材科技有限公司 | A kind of mold suitable for water base pulp gel injection moulding technique |
| CN112405791A (en) * | 2020-09-29 | 2021-02-26 | 天津津航技术物理研究所 | Forming die and forming method for biscuit of hyper-hemispherical ceramic fairing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3087083B2 (en) * | 1991-03-18 | 2000-09-11 | イビデン株式会社 | Graphite mold for plastic molding |
| CN2156966Y (en) * | 1993-06-15 | 1994-02-23 | 孙增鑫 | Casting mould |
| CN1103831A (en) * | 1994-02-23 | 1995-06-21 | 李启山 | Method for forming dies cavity for extrusion moulding special shapes |
-
2006
- 2006-03-31 CN CNB2006100098876A patent/CN100420564C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106313276A (en) * | 2015-06-26 | 2017-01-11 | 汉能新材料科技有限公司 | Die for preparing large-size tubular green bodies through gel casting |
| CN106738590A (en) * | 2016-12-16 | 2017-05-31 | 浙江海峰制鞋设备有限公司 | A kind of pouring head overcoat for PU materials |
| CN106738590B (en) * | 2016-12-16 | 2023-01-17 | 浙江海峰自动化设备有限公司 | Casting head jacket for PU material |
| CN106994759A (en) * | 2017-04-12 | 2017-08-01 | 北京科技大学 | A kind of ceramic impeller gel casting forming mould and its manufacture method |
| CN108274610A (en) * | 2018-01-30 | 2018-07-13 | 北京航大新材科技有限公司 | A kind of mold suitable for water base pulp gel injection moulding technique |
| CN112405791A (en) * | 2020-09-29 | 2021-02-26 | 天津津航技术物理研究所 | Forming die and forming method for biscuit of hyper-hemispherical ceramic fairing |
| CN112405791B (en) * | 2020-09-29 | 2021-10-15 | 天津津航技术物理研究所 | Forming die and forming method for biscuit of hyper-hemispherical ceramic fairing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100420564C (en) | 2008-09-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Dongguan Xinbo Plastic Co., Ltd. Assignor: Harbin Institute of Technology Contract record no.: 2010440001325 Denomination of invention: Mould for water base pulp gel injection moulding Granted publication date: 20080924 License type: Exclusive License Open date: 20060830 Record date: 20100824 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20110331 |