CN110341034B - Pressing die assembly for convex edge of inner wall of ceramic tube - Google Patents
Pressing die assembly for convex edge of inner wall of ceramic tube Download PDFInfo
- Publication number
- CN110341034B CN110341034B CN201910809112.4A CN201910809112A CN110341034B CN 110341034 B CN110341034 B CN 110341034B CN 201910809112 A CN201910809112 A CN 201910809112A CN 110341034 B CN110341034 B CN 110341034B
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- CN
- China
- Prior art keywords
- die
- wall
- base
- die core
- core
- 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.)
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- 239000000919 ceramic Substances 0.000 title claims abstract description 33
- 238000003825 pressing Methods 0.000 title claims abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 21
- 239000011229 interlayer Substances 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 6
- 238000000748 compression moulding Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
-
- 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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/76—Moulds
- B28B21/82—Moulds built-up from several parts; Multiple moulds; Moulds with adjustable parts
-
- 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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/86—Cores
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention relates to a pressing die assembly for a convex edge of an inner wall of a ceramic tube, which effectively solves the problems of low production efficiency, high cost and high rejection rate of the existing ceramic tube with the convex edge of the inner wall; the technical scheme includes that the upper die assembly comprises an upper base and an upper die core, the upper die core is vertically arranged in the upper base and can slide in the upper base, the lower end of the upper die core is in a stepped shape with a reduced shaft diameter, the lower die assembly comprises a lower base and a lower die core, the lower die core is vertically arranged in the lower base, the upper end of the lower die core is in a stepped shape with a reduced shaft diameter, the lower end of the upper die core and the upper end of the lower die core are combined to form an annular groove, the outer die is an ultrahigh pressure container cylinder, a rubber layer is arranged on the inner wall of the outer die, a forming die rubber layer is attached to the inner wall of the rubber layer, and an oil inlet pipe and an oil outlet pipe which are communicated with the rubber interlayer are arranged on the outer die; the invention effectively improves the production efficiency, saves the production cost and has high ceramic tube blank forming quality.
Description
Technical Field
The invention relates to the field of ceramic compression molding, in particular to a ceramic tube inner wall convex edge compression mold assembly.
Background
The ceramic tube is a commonly used insulating material and is largely used in the field of power equipment, and the current ceramic tube adopts a processing technology of compression molding and then firing; for the ceramic tube with the flat inner wall, the inner mold and the outer mold can be used for one-step compression molding, but for the ceramic blank with the convex edge on the inner wall, the ceramic blank cannot be demolded after molding, so that one-step compression molding cannot be performed, the blank with the flat inner wall needs to be compression molded first, then the inner wall of the ceramic blank is turned to form the convex edge, the production efficiency is low, a lathe and a turning worker are needed, raw materials are wasted, the equipment, labor and raw material cost are high, and the ceramic blank is fragile and fragile, so that the turning process can improve the rejection rate.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the pressing die assembly for the convex edge of the inner wall of the ceramic tube, which effectively solves the problems of low production efficiency, high cost and high rejection rate of the existing ceramic tube with the convex edge of the inner wall.
The technical scheme is that the ceramic tube inner wall convex edge pressing die assembly comprises an upper die assembly, a lower die assembly and an outer die, wherein the upper die assembly comprises an upper base and a columnar upper die core, the upper die core is vertically arranged in the upper base, the lower end of the upper die core extends out of the upper base, the upper die core can slide up and down in the upper base, and the lower end of the upper die core is in a stepped shape with a reduced shaft diameter; the lower die assembly comprises a lower base and a lower die core, the lower die core is vertically arranged in the lower base, the upper end of the lower die core extends out of the lower base, the upper end of the lower die core is in a stepped shape with a reduced shaft diameter, and the lower end of the upper die core and the upper end of the lower die core are in butt joint to form an annular groove; the outer mold is a cylindrical ultrahigh pressure container cylinder, a rubber layer is arranged on the inner wall of the outer mold, a closed interlayer is formed between the rubber layer and the inner wall of the outer mold, a molding mold rubber layer is attached to the inner wall of the rubber layer, and an oil inlet pipe and an oil outlet pipe which are communicated with the interlayer are arranged on the outer mold.
The invention effectively improves the production efficiency, saves the production cost and has high ceramic tube blank forming quality.
Drawings
FIG. 1 is a front cross-sectional view of the present invention in the feed.
Fig. 2 is a front cross-sectional view of the present invention when pressed.
Fig. 3 is an enlarged view of the position a in fig. 1.
Fig. 4 is an enlarged view of the position B in fig. 1.
Fig. 5 is an enlarged view of position C in fig. 2.
Fig. 6 is a front cross-sectional view of the ceramic tube after molding.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 6, the invention comprises an upper die assembly, a lower die assembly and an outer die 1, wherein the upper die assembly comprises an upper base 2 and a columnar upper die core 3, the upper die core 3 is vertically arranged in the upper base 2, the lower end of the upper die core 3 extends out of the upper base 2, the upper die core 3 can slide up and down in the upper base 2, and the lower end of the upper die core 3 is in a stepped shape with a reduced shaft diameter; the lower die assembly comprises a lower base 4 and a lower die core 5, the lower die core 5 is vertically arranged in the lower base 4, the upper end of the lower die core 5 extends out of the lower base 4, the upper end of the lower die core 5 is in a stepped shape with a reduced shaft diameter, and the lower end of the upper die core 3 and the upper end of the lower die core 5 are combined to form an annular groove; the outer die 1 is a cylindrical ultrahigh pressure container cylinder, a rubber layer 6 is arranged on the inner wall of the outer die, a closed interlayer 7 is formed between the rubber layer 6 and the inner wall of the outer die 1, a molding die rubber layer 21 is attached to the inner wall of the rubber layer 6, and an oil inlet pipe 8 and an oil outlet pipe 9 which are communicated with the interlayer 7 are arranged on the outer die 1.
The bottom of the upper base 2 is provided with a vertical piston cavity 10, the upper end of the upper mold core 3 is arranged in the piston cavity 10, the side wall of the upper mold core is attached to the piston cavity 10, the top of the piston cavity 10 is provided with an air inlet 11 and an air outlet 12, the air inlet 11 is provided with a first one-way valve 13, and the air outlet 12 is provided with a first electromagnetic switch valve 14; the upper mold core 3 can be pushed to move downwards or upwards by the inflation and the exhaust in the piston cavity 10.
The lower end face of the upper mold core 3 is provided with a cylindrical positioning block 15, the lower end of the positioning block 15 is provided with a chamfer, and the upper end face of the lower mold core 5 is provided with a positioning groove 16 matched with the positioning block 15.
An upper hydraulic cylinder 17 capable of driving the upper base 2 to move up and down is connected above the upper base 2, and a lower hydraulic cylinder 18 capable of driving the lower base 4 to move up and down is connected below the lower base.
The oil inlet pipe 8 is provided with a second one-way valve 19, and the oil outlet pipe 9 is provided with a second electromagnetic switch valve 20.
The upper end and the lower end of the outer die 1 are respectively provided with a circular fixed end cover 22 through screws, and the upper end and the lower end of the rubber layer 6 are pressed on the outer die 1 by the two fixed end covers 22, so that the sealing installation of the rubber layer 6 and the inner wall of the outer die 1 is completed.
The outer die 1 is fixed on a frame, an upper die assembly and a lower die assembly are arranged at the upper end and the lower end of the outer die 1 in an up-down opposite mode, an upper die core 3, a lower die core 5 and the outer die 1 are coaxial, an upper hydraulic cylinder 17 and a lower hydraulic cylinder 18 are fixed on the frame, an air inlet hole 11 is connected with an air pump or a pressure air source, and an oil inlet pipe 8 is connected with an oil pump; when the novel plastic injection molding machine is used, firstly, the air pump is started to charge air into the piston cavity 10 through the air inlet hole 11, so that the upper mold core 3 extends downwards, then the lower hydraulic cylinder 18 and the upper hydraulic cylinder 17 are started, the lower hydraulic cylinder 18 drives the lower base 4 to move upwards, the lower mold core 5 is inserted into the outer mold 1, the lower base 4 seals the lower end of the outer mold 1, the upper hydraulic cylinder 17 drives the upper base 2 to move downwards, the lower mold core 5 is inserted into the outer mold 1 and is combined and pressed with the lower mold core 5, and the positioning block 15 and the positioning groove 16 are matched to prevent dislocation of the upper mold core 5 and the lower mold core 5; after the upper die core 3 and the lower die core 5 are closed, the upper base 2 is higher than the fixed end cover 22 at the upper end of the outer die 1, so that the upper end of the outer die 1 is not closed, at the moment, quantitative ceramic powder is added into the outer die 1 from the upper port of the outer die 1, then the upper hydraulic cylinder 17 is started again to drive the upper base 2 to move downwards continuously, gas in the piston cavity 10 is compressed until the upper end of the outer die 1 is closed by the upper base 2, at the moment, the second electromagnetic switch valve 20 is in a closed state, an oil pump is started, hydraulic oil is pumped into the rubber interlayer 7 through the oil inlet pipe 8 until the oil pressure of the rubber interlayer 7 reaches the pressing requirement and maintains the pressure for a period of time, the rubber layer 6 applies pressure to the ceramic powder, the limiting effect of the upper base and the lower base is added, the ceramic powder in the outer die 1 is pressed and formed, and the air pressure at the upper end of the upper die core 3 can be prevented from being pushed upwards by the powder pressure during the pressure maintaining period; the mode of pressurizing the ceramic blank from the side by adopting hydraulic oil can lead the pressure of the ceramic blank to be uniform, and ensure the pressing quality.
The inner wall of the molding die glue layer 21 is provided with lines or patterns, and corresponding lines and patterns can be pressed on the outer wall of the ceramic tube.
After ceramic powder is molded, firstly, a second electromagnetic switch valve 20 is opened, the pressure in a rubber interlayer 7 is relieved, then, a first electromagnetic switch valve 14 on an exhaust hole 12 is opened, gas in a piston cavity 10 is exhausted, then, the first electromagnetic switch valve 14 is closed, negative pressure is formed in the piston cavity 10, and then, an upper hydraulic cylinder 18 and a lower hydraulic cylinder 18 are started simultaneously, so that an upper base 2 moves upwards, an upper mold core 3 moves upwards along with the upper base 2 under the action of external atmospheric pressure, a lower base 4 moves downwards, a ceramic pipe molded by pressing moves out of an outer mold 1 along with the lower base 4, and then, a ceramic pipe blank body is taken down; the gas in the piston cavity 10 is discharged firstly, so that the upper die core 3 can be prevented from moving downwards under the action of air pressure to damage a blank body when the lower die core 5 moves downwards along with the lower base 4.
According to the invention, through the split type mold core design and the cooperation of the upper base 2 which can move relative to the mold core, all procedures of mold assembling, feeding, pressing and discharging can be automatically completed, automatic continuous production is realized, ceramic tubes with inner wall convex edges can be molded by one-step pressing without subsequent turning, the working hours are greatly reduced, the cost of lathe equipment and workers is saved, and powder is saved.
Claims (4)
1. The ceramic tube inner wall convex edge pressing die assembly comprises an upper die assembly, a lower die assembly and an outer die (1) and is characterized in that the upper die assembly comprises an upper base (2) and a columnar upper die core (3), the upper die core (3) is vertically arranged in the upper base (2) and the lower end of the upper die core extends out of the upper base (2), the upper die core (3) can slide up and down in the upper base (2), and the lower end of the upper die core (3) is in a stepped shape with a reduced shaft diameter; the lower die assembly comprises a lower base (4) and a lower die core (5), the lower die core (5) is vertically arranged in the lower base (4) and the upper end of the lower die core (5) extends out of the lower base (4), the upper end of the lower die core (5) is in a stepped shape with a reduced shaft diameter, and the lower end of the upper die core (3) and the upper end of the lower die core (5) are combined to form an annular groove; the outer die (1) is a cylindrical ultrahigh pressure container cylinder, a rubber layer (6) is arranged on the inner wall of the outer die, a closed interlayer (7) is formed between the rubber layer (6) and the inner wall of the outer die (1), a molding die rubber layer (21) is attached to the inner wall of the rubber layer (6), and an oil inlet pipe (8) and an oil outlet pipe (9) which are communicated with the interlayer (7) are arranged on the outer die (1);
The bottom of the upper base (2) is provided with a vertical piston cavity (10), the upper end of the upper mold core (3) is arranged in the piston cavity (10) and the side wall of the upper mold core is attached to the piston cavity (10), the top of the piston cavity (10) is provided with an air inlet hole (11) and an air outlet hole (12), the air inlet hole (11) is provided with a first one-way valve (13), and the air outlet hole (12) is provided with a first electromagnetic switch valve (14);
An upper hydraulic cylinder (17) capable of driving the upper base (2) to move up and down is connected above the upper base (2), and a lower hydraulic cylinder (18) capable of driving the lower base (4) to move up and down is connected below the lower base.
2. The ceramic tube inner wall flange pressing die assembly according to claim 1, wherein a cylindrical positioning block (15) is arranged on the lower end face of the upper die core (3), a chamfer is arranged at the lower end of the positioning block (15), and a positioning groove (16) matched with the positioning block (15) is arranged on the upper end face of the lower die core (5).
3. The ceramic pipe inner wall convex edge pressing die assembly according to claim 1, wherein the oil inlet pipe (8) is provided with a second one-way valve (19), and the oil outlet pipe (9) is provided with a second electromagnetic switch valve (20).
4. The pressing die assembly for the convex edge of the inner wall of the ceramic tube according to claim 1, wherein the upper end and the lower end of the outer die (1) are respectively provided with a circular fixed end cover (22) through screws, and the two fixed end covers (22) press the upper end and the lower end of the rubber layer (6) on the outer die (1), so that the sealing installation of the rubber layer (6) and the inner wall of the outer die (1) is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910809112.4A CN110341034B (en) | 2019-08-29 | 2019-08-29 | Pressing die assembly for convex edge of inner wall of ceramic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910809112.4A CN110341034B (en) | 2019-08-29 | 2019-08-29 | Pressing die assembly for convex edge of inner wall of ceramic tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110341034A CN110341034A (en) | 2019-10-18 |
| CN110341034B true CN110341034B (en) | 2024-04-19 |
Family
ID=68181371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910809112.4A Active CN110341034B (en) | 2019-08-29 | 2019-08-29 | Pressing die assembly for convex edge of inner wall of ceramic tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110341034B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1426531A (en) * | 1973-12-21 | 1976-03-03 | Zapadoceske Keramicke Z Narodn | Apparatus for producing of ceramic branching pipe elements |
| EP0190701A2 (en) * | 1985-02-05 | 1986-08-13 | Asahi Glass Company Ltd. | Joint structure for a tube support plate and a tube |
| JPH03126505A (en) * | 1989-10-12 | 1991-05-29 | Ngk Insulators Ltd | Hydrostatic pressure mold for ceramic pipe |
| JP2004174861A (en) * | 2002-11-26 | 2004-06-24 | Kyocera Corp | Bottomed ceramic tube molding die and its manufacturing method |
| CN201456207U (en) * | 2009-07-25 | 2010-05-12 | 西南交通大学 | Pressurizing structure of ceramic isostatic mold core |
| CN201645646U (en) * | 2009-11-17 | 2010-11-24 | 中国科学院合肥物质科学研究院 | Cold isostatic pressing forming mould for preparing Na-beta-Al2O3 ceramic tube with one end closed |
| CN201907147U (en) * | 2010-12-14 | 2011-07-27 | 天津市中环电陶有限公司 | Isostatic pressing die |
| CN203198052U (en) * | 2013-04-12 | 2013-09-18 | 锦州金属陶瓷有限公司 | One-step isostatic pressing forming die for stepped inner wall of alumina ceramic tube |
| JP2015016632A (en) * | 2013-07-11 | 2015-01-29 | 住友金属鉱山株式会社 | Cylindrical molding tool, cylindrical ceramic molding and production method for the molding |
| CN104802283A (en) * | 2015-03-27 | 2015-07-29 | 长沙新气象自动化技术有限公司 | Graphite crucible one-off molding device and technology thereof |
| CN107263680A (en) * | 2017-07-24 | 2017-10-20 | 湖北工业大学 | A kind of hydraulic moving type brickmaking machine |
| CN206796110U (en) * | 2017-05-01 | 2017-12-26 | 佛山市顺德区乐从镇迅发陶瓷机械制造有限公司 | A kind of adobe forming mould |
| CN208232054U (en) * | 2018-01-15 | 2018-12-14 | 安徽正旺膜分离技术股份有限公司 | A kind of feed supplement formula tubular ceramic membrane blank forming device |
| CN210791483U (en) * | 2019-08-29 | 2020-06-19 | 济源市东方自动化设备有限公司 | Pressing die assembly for convex edge of inner wall of ceramic tube |
-
2019
- 2019-08-29 CN CN201910809112.4A patent/CN110341034B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1426531A (en) * | 1973-12-21 | 1976-03-03 | Zapadoceske Keramicke Z Narodn | Apparatus for producing of ceramic branching pipe elements |
| EP0190701A2 (en) * | 1985-02-05 | 1986-08-13 | Asahi Glass Company Ltd. | Joint structure for a tube support plate and a tube |
| JPH03126505A (en) * | 1989-10-12 | 1991-05-29 | Ngk Insulators Ltd | Hydrostatic pressure mold for ceramic pipe |
| JP2004174861A (en) * | 2002-11-26 | 2004-06-24 | Kyocera Corp | Bottomed ceramic tube molding die and its manufacturing method |
| CN201456207U (en) * | 2009-07-25 | 2010-05-12 | 西南交通大学 | Pressurizing structure of ceramic isostatic mold core |
| CN201645646U (en) * | 2009-11-17 | 2010-11-24 | 中国科学院合肥物质科学研究院 | Cold isostatic pressing forming mould for preparing Na-beta-Al2O3 ceramic tube with one end closed |
| CN201907147U (en) * | 2010-12-14 | 2011-07-27 | 天津市中环电陶有限公司 | Isostatic pressing die |
| CN203198052U (en) * | 2013-04-12 | 2013-09-18 | 锦州金属陶瓷有限公司 | One-step isostatic pressing forming die for stepped inner wall of alumina ceramic tube |
| JP2015016632A (en) * | 2013-07-11 | 2015-01-29 | 住友金属鉱山株式会社 | Cylindrical molding tool, cylindrical ceramic molding and production method for the molding |
| CN104802283A (en) * | 2015-03-27 | 2015-07-29 | 长沙新气象自动化技术有限公司 | Graphite crucible one-off molding device and technology thereof |
| CN206796110U (en) * | 2017-05-01 | 2017-12-26 | 佛山市顺德区乐从镇迅发陶瓷机械制造有限公司 | A kind of adobe forming mould |
| CN107263680A (en) * | 2017-07-24 | 2017-10-20 | 湖北工业大学 | A kind of hydraulic moving type brickmaking machine |
| CN208232054U (en) * | 2018-01-15 | 2018-12-14 | 安徽正旺膜分离技术股份有限公司 | A kind of feed supplement formula tubular ceramic membrane blank forming device |
| CN210791483U (en) * | 2019-08-29 | 2020-06-19 | 济源市东方自动化设备有限公司 | Pressing die assembly for convex edge of inner wall of ceramic tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110341034A (en) | 2019-10-18 |
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