EP1115541A1 - Verfahren zum pressen zylindrischer verbundkörper - Google Patents
Verfahren zum pressen zylindrischer verbundkörperInfo
- Publication number
- EP1115541A1 EP1115541A1 EP00956076A EP00956076A EP1115541A1 EP 1115541 A1 EP1115541 A1 EP 1115541A1 EP 00956076 A EP00956076 A EP 00956076A EP 00956076 A EP00956076 A EP 00956076A EP 1115541 A1 EP1115541 A1 EP 1115541A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carrier plate
- press
- sleeve
- plates
- plate
- 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.)
- Granted
Links
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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- 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
- B28B1/008—Producing shaped prefabricated articles from the material made from two or more materials having different characteristics or properties
-
- 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
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/025—Hot pressing, e.g. of ceramic materials
Definitions
- the invention relates to a method for producing composite bodies and in particular cylindrical ceramic composite bodies of glow plugs, in which the individual parts to be connected are each pre-formed from different materials by cold pressing, joined in a joining step, connected in a hot pressing process and then in their final form in a finishing process brought, as well as a pressing device, which is set up as a multiple use and is used to manufacture the composite body.
- a ceramic insulating layer is first of all produced using a cold pressing process and the conductive layers lying on both sides of the insulating layer are produced separately. Then the insulating layer is placed between the conductive layers and first connected with a cold pressing step. Then the resin is crosslinked and the composite is formed in a hot pressing process. Finally, the composite panels are sawn into square bars and profile ground for their assembly. Because of the two pressing steps required to produce a composite body, namely cold pressing and hot pressing, different types of molds and the change from one mold to another are necessary. Furthermore, the division of the hardened composite panels into square bars and the subsequent round grinding of the same is complex and expensive.
- Some special properties of the resin used to bind the ceramic powder must be taken into account. B. that the hot-pressed composites should only be demolded from the cooled mold, since the hot cylindrical composite bodies are deformed or even damaged under the influence of demolding forces.
- the task is solved according to the requirements.
- the joining step comprises a step in which the individual parts are placed in a molded sleeve and the molded sleeve is closed on both sides with an axially movable stamp
- B At least one shaped sleeve prepared in this way is then placed in a corresponding hole in an insulating plate and from there is pressed into a hole in alignment with this in a hot steel carrier plate, which for this purpose lies briefly in parallel on the insulating plate;
- C The heated carrier plate with the molded sleeve is clamped between two press plates of a pressing device and then the individual parts located in the molded sleeve are pressed on both sides using the spring-loaded pressure pins that axially engage in the end stamps of the molded sleeve and pass through the two heated press plates; D: The pressed individual parts under pressure in the mold sleeve and these remain in the hot carrier plate between the hot press plates during a necessary pressure maintenance period;
- Such a pressing device which is suitable for the production method according to the invention and is designed as a multiple-use device, is characterized in that a carrier plate, the thickness of which preferably corresponds to the length of the shaped sleeves, is carried out with parallel and regularly spaced bores perpendicularly through the carrier plate with a diameter adapted to accommodate the shaped sleeves and in the center plane of the support plate there are second bores for flowing through with a heating medium or for receiving heating cartridges, that this support plate is clamped between two press plates by using centering elements in such a way that individually sprung press pins with the bores are arranged displaceably in corresponding bores of the press plate in the carrier plate for receiving the press sleeves and that the guide sleeves of the individually sprung press pins, each with a movable pressure plate on the carrier plate, face away side of the press plates are connected.
- FIG. 1 schematically shows a longitudinal section through a molded sleeve used according to the invention, which receives the cold preformed individual parts made of binder and ceramic powder between two fitted pressure stamps.
- FIG. 2 shows schematically and in cross section a section of a pressing device according to the invention with multiple uses with inserted molded sleeves.
- Figure shows in longitudinal section a cylindrical shaped sleeve 10 and the individual parts of a preform inserted into this shaped sleeve 10, the latter on the left side also in cross section.
- the preform consisting of an insulation preform 1 and two preforms 2 enclosing the insulation preform 1 on both sides is covered by a cap 3 made of prepressed conductive material.
- these individual parts 1 to 3 consist of ceramic powders bonded in a solid resin.
- the shaped sleeve 10 is closed off by a movable stamp 11 and 12.
- the shaped sleeve 10 forms a cylindrical sleeve, several of which are pressed simultaneously into the corresponding bores in the carrier plate.
- FIG. 2 schematically shows a cross section through the carrier plate 27, the press plates 17 placed on both sides of the steel carrier plate, the screwed together, pressure plates 31a and 31b movable over the rod 33 and the movable in the press plates 17, via plate springs 19 and clamping bolts 22 clamped pressure pins 13. It can be seen that FIG. 2 does not show the entire pressing device with multiple uses, but only a section thereof with the central plane SS of the carrier plate 27 as a mirror plane.
- the molded sleeves 10 prepared according to FIG. 1 are first inserted into bores in an insulating plate (not shown here), which has the same hole pattern as the carrier plate 27, as in a bottle rack. Then the insulating plate is pressed from one side against the heated steel carrier plate 27 in such a way that the corresponding bores of the insulating plate and carrier plate are aligned, and the shaped sleeves 10 are simultaneously moved from the bores of the insulating plate into the corresponding bores 20 of the heated carrier plate by means of a device (not shown) 27 transferred, the carrier plate 27 inserted into the pressing device between the two pressing plates 17 and the pressing device locked mechanically or hydraulically, conical centering pins 21 ensuring that the pressing pins 13 inserted into the pressing plates 17 and the sleeves 10 in the carrier plate are axially aligned.
- Figure 2 shows only two holes 20 in the carrier plate and pressed into it two form sleeves 10 with pressure stamps 11 and that the line SS represents both the central plane
- the carrier plate 27 and the press plates 17 are heated via the bores 16 either by a flowing heat transfer fluid or by inserted heating cartridges.
- the pressure plates 31a, 31b are moved back to the lower stop plates 30 on both sides via the pressure rods 33.
- the heads of the pressure pins 13 lie against the shoulders in the guide sleeves 23. The pressure pins are thus pulled out of the shaped sleeves 10 and are then again flush with the surfaces of the press plates 17.
- the carrier plate 27 can be extended between the two pressing plates 17.
- the compressed mass then cures without pressure in the shaped sleeves 10, which are still in the bores of the heated carrier plate.
- the shaped sleeves 10 are ejected from the hot carrier plate 27, cooled in air, and the pressed glow plugs together with the movable stamps 11 and 12 are pressed out of the shaped sleeves 10.
- the molded sleeves and pressure stamps are cleaned and the molded sleeves are filled again with preforms and sealed with the pressure stamps.
- the cooled glow plug blanks are ground to their final shape on a grinding machine.
- the pressing device schematically shown in Figure 2 with multiple benefits which e.g. a 100-fold benefit can replace the multiple molds required in the known method for changing and reduce the effort required for grinding, since the carrier plate 27 is kept at a constant hardening temperature during the entire curing process with and without pressing pressure.
- the pressure-free curing time following the hot pressing suggests the use of several of the inexpensive carrier plates for each pressing device in order to operate the pressing devices, which are considerably more expensive than the carrier plates, without downtimes.
- the pressing times are reduced by not having to cool and heat the carrier plate, in contrast to the previous plate pressing process. This significantly reduces the manufacturing costs of ceramic glow plugs.
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934761A DE19934761C1 (de) | 1999-07-23 | 1999-07-23 | Verfahren zum Pressen zylindrischer Verbundkörper |
DE19934761 | 1999-07-23 | ||
PCT/DE2000/002237 WO2001007223A1 (de) | 1999-07-23 | 2000-07-08 | Verfahren zum pressen zylindrischer verbundkörper |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1115541A1 true EP1115541A1 (de) | 2001-07-18 |
EP1115541B1 EP1115541B1 (de) | 2003-10-01 |
Family
ID=7915912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00956076A Expired - Lifetime EP1115541B1 (de) | 1999-07-23 | 2000-07-08 | Verfahren zum pressen zylindrischer verbundkörper |
Country Status (5)
Country | Link |
---|---|
US (1) | US6524414B1 (de) |
EP (1) | EP1115541B1 (de) |
JP (1) | JP2003505268A (de) |
DE (2) | DE19934761C1 (de) |
WO (1) | WO2001007223A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113442267A (zh) * | 2021-06-28 | 2021-09-28 | 邹平永和新型建材有限公司 | 一种珍珠岩复合煤矸石页岩烧结砌块的制备装置及方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102808869B (zh) * | 2012-08-17 | 2015-07-15 | 慈溪市鼎晨汽车零部件有限公司 | 一种离合器从动盘及其制造方法 |
CN107415041B (zh) * | 2017-09-27 | 2022-12-09 | 刘子建 | 一种夹臂式多工位高压注浆机 |
CN107756857B (zh) * | 2017-11-25 | 2024-04-30 | 秀山县佳沃农业发展有限公司 | 一种组合式秸秆压制机成型盘 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB472110A (en) * | 1935-01-25 | 1937-09-13 | Gen Motors Corp | Improvements in refractory bodies and method of making same |
US2627765A (en) * | 1951-01-12 | 1953-02-10 | Hopkins Ethan Charles | Apparatus for making rotors for induction motors |
JPS4844307A (de) | 1971-08-02 | 1973-06-26 | ||
GB1383395A (en) * | 1972-03-06 | 1974-02-12 | Olin Energy Systems Ltd | Isostatic moulding apparatus and mandrel assembly therefor |
US4009977A (en) * | 1976-04-29 | 1977-03-01 | United States Steel Corporation | Apparatus for the triaxial compression of particulate material |
US4382053A (en) * | 1980-08-01 | 1983-05-03 | United Kingdom Atomic Energy Authority | Hot pressing of ceramic materials |
US4920640A (en) * | 1988-01-27 | 1990-05-01 | W. R. Grace & Co.-Conn. | Hot pressing dense ceramic sheets for electronic substrates and for multilayer electronic substrates |
DE4425922B4 (de) * | 1994-07-21 | 2004-03-18 | Siemens Ag | Verfahren zur Herstellung einer Leuchtstoffkeramik durch Heißpressen |
DE19857958A1 (de) * | 1998-12-16 | 2000-06-21 | Bosch Gmbh Robert | Verfahren zur Herstellung eines Stiftheizer |
-
1999
- 1999-07-23 DE DE19934761A patent/DE19934761C1/de not_active Expired - Fee Related
-
2000
- 2000-07-08 EP EP00956076A patent/EP1115541B1/de not_active Expired - Lifetime
- 2000-07-08 DE DE50003893T patent/DE50003893D1/de not_active Expired - Lifetime
- 2000-07-08 US US09/787,807 patent/US6524414B1/en not_active Expired - Fee Related
- 2000-07-08 WO PCT/DE2000/002237 patent/WO2001007223A1/de active IP Right Grant
- 2000-07-08 JP JP2001512081A patent/JP2003505268A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0107223A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113442267A (zh) * | 2021-06-28 | 2021-09-28 | 邹平永和新型建材有限公司 | 一种珍珠岩复合煤矸石页岩烧结砌块的制备装置及方法 |
Also Published As
Publication number | Publication date |
---|---|
US6524414B1 (en) | 2003-02-25 |
EP1115541B1 (de) | 2003-10-01 |
JP2003505268A (ja) | 2003-02-12 |
DE19934761C1 (de) | 2000-11-30 |
DE50003893D1 (de) | 2003-11-06 |
WO2001007223A1 (de) | 2001-02-01 |
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