WO2004076100A1 - 焼結方法及び装置 - Google Patents
焼結方法及び装置 Download PDFInfo
- Publication number
- WO2004076100A1 WO2004076100A1 PCT/JP2003/016155 JP0316155W WO2004076100A1 WO 2004076100 A1 WO2004076100 A1 WO 2004076100A1 JP 0316155 W JP0316155 W JP 0316155W WO 2004076100 A1 WO2004076100 A1 WO 2004076100A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sintered
- sintering
- mold
- electrode
- current
- Prior art date
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 58
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
Definitions
- the heating portion of the material to be sintered such as metal or ceramic is limited to a specific position
- direct pressure conduction is performed by moving the material to be sintered and the heating portion relative to each other for a short time.
- Method and apparatus for sintering materials The present invention provides a manufacturing method and apparatus suitable for obtaining a sintered body having a non-uniform cross section of a long rod material.
- the manufacturing time can be largely shortened as compared with the conventional sintering method by the atmosphere heating.
- an electrode for current application heating is disposed at both ends in the axial direction of the material to be sintered, and a method of simultaneously heating and pressing is adopted. 0 0 0 2 3 9 7 0 7).
- the calorific value at the contact portion between the two in the energization path is particularly large as compared with the other portions of the powder to be sintered, so the sintered material from the electrode contact surface A temperature gradient is generated toward the central part (at a distance from the electrode).
- the electrical resistance changes due to the difference in area of the cross section perpendicular to the current passage.
- the calorific value changes and a uniform sintered body can not be obtained. Therefore, it is difficult to produce a sintered product having a nonuniform cross section such as a rod material having a certain length or more and a stepped member by a conventional direct current pressure sintering method into a product having a uniform material. There was a problem that.
- the present invention provides a sintering method and apparatus having uniform quality of sintered body and excellent sinterability, even for a long rod or a sintered body having an uneven cross section. It is provided.
- the heating portion (position) of the material to be sintered is limited (restricted). It has been found that this object can be achieved by carrying out sintering while relatively sequentially moving
- the present invention is based on the above findings.
- a connecting terminal plate of an electrode having a space closely attached to the periphery of the mold and freely moving on a single axis is provided, and the conductive portion is moved and sintered by the connecting terminal plate.
- the present invention is also based on the above findings.
- Sintering apparatus characterized in that it is equipped with a liftable ram that can be controlled
- a sintering apparatus characterized by comprising a load-controllable pressure ram for pressing the sintered powder material disposed in the cylindrical mold from one end of the mold. 1 1.
- FIG. 1 is a schematic explanatory view showing an example of an apparatus used in a method for manufacturing a long sintered body by fixing the raw material of the present invention and moving the electrode
- FIG. 2 shows the electrode and die of the present invention
- Fig. 3 is a schematic explanatory view showing an example of an apparatus used in a method for producing a long sintered body by fixing a powder and moving a powder material for sintering
- Fig. 3 the long sintered body of the present invention
- Schematic explanatory drawing which shows an example of the apparatus used for manufacture
- FIG. 4 is explanatory drawing which shows the temperature distribution measuring method of a type
- FIG. 5 Electrode connection terminal board FIG.
- FIG. 6 shows the result of temperature distribution measurement at the time of current passing through
- FIG. 6 shows an outline of the apparatus of the sintering method used in Example 2
- FIG. 7 shows the thermoelectric conditions under the sintering conditions of Example 2.
- Fig. 8 is a cross-sectional view of the heating part where the pair 12 exists
- Fig. Fig. 9 is a diagram showing the temperature change of Linda
- Fig. 9 is a diagram showing the effect of sintering temperature on the density of the aluminum sintered product obtained by Example 2
- Fig. 10 is a current path, ie, a heating site
- FIG. 11 is a schematic view of a method of sintering while moving
- FIG. 11 is a schematic view of a method of sintering while moving
- FIG. 11 is a schematic cross-sectional explanatory view showing an example of sintering of the stepped component shown in Example 4.
- Fig.12 is a schematic cross-sectional explanatory view showing an example of sintering of parts (tape parts) whose diameter is changed
- Fig.13 is a length using the stationary stage and the spacer of the present invention.
- Fig. 14 is a schematic explanatory view showing an example of an apparatus used for producing a sintered body of a length
- Fig. 14 shows a state in which a long sintered body is produced using two spacers in Fig. 13.
- FIG. 15 is a schematic explanatory view showing how a long sintered body is manufactured using four additional sheets of the spacer in Fig.14
- Fig.16 is a schematic view
- FIG. 16 is a schematic explanatory view showing production of a long sintered body to be subjected to final sintering by inverting a partially sintered mold after the sintering of FIG.
- the electrically conductive portion and the mold provided with the sintering space are integrally heated as a whole based on the known electric pressure and pressure sintering method. It is limited to a specific position, and sintering is performed continuously in one direction while relatively moving between a portion to be sintered and a heating portion, so that a rod or sintered body having a non-uniform cross section is obtained.
- an electrode connection terminal plate (movable electrode) 1 having a thickness corresponding to the portion to be heated, and a cylinder for filling the raw material powder 2 Place it in close contact with the outer wall of the mold (cylinder) 3 and move freely on one axis (of a cylindrical mold).
- the filled sintering powder 2 is pressed from both ends by the punch 4 inside the mold.
- Reference numeral 5 is a pressure plate.
- power is supplied to the movable electrode 1 while pressing the powder, and the electrode 1 is moved while being controlled to achieve a desired temperature and speed.
- a sintered body having a rod-like shape or an uneven cross section can be obtained.
- the die 6 connected to the electrode 1 is energized and controlled to a desired temperature, and then the raw material powder 2 is pressurized by the push rod 10 Send in.
- the sintered product 9 Pressurize the raw material powder by taking measures to create resistance to the progress.
- the apparatus of the present invention has a mold 23 having a cylindrical molding space in which the powder 29 to be sintered is filled, and has the same inner diameter as the molding space of the mold 23.
- Punches 2 4 and 2 5 having a dimensional outline are disposed at both ends (upper and lower end portions) of the mold 2 3, and the punch 2 4 4 is used to press the powder 2 9 to be sintered in the mold. it can.
- the lower punch 25 is normally fixed, and has a structure in which the powder 2 9 in the mold is further pressed (loaded) by the upper punch 2, but the lower punch 2 5 may also be moved. it can.
- the upper punch 24 is pressurized by the pressurizing ram 21. As shown in FIG. 3, a structure may be adopted in which pressure is applied by the pressure ram 21 via the pressure plate 33.
- the lower punch 25 is supported by a lifting ram 22 via a movable lifting stage 34.
- the elevating stage 34 has a structure for supporting the mold 23 having a cylindrical molding space, and adjusts the height of the mold 23 having the molding space by raising and lowering the mold 23.
- An electrode 28 for electrically heating the powder to be sintered in the mold 23 is designed to be movable in the horizontal direction. This is necessary in order not to complicate the mechanism of the power supply from the power supply. Further, as shown in FIG. 1 c , provided with an electrode pressure ram 30 for pressing the current-carrying part of the electrode 28 into a mold, as shown in FIG. The electrode 28 can be configured to be pressed against the mold 23 via the current plate 26.
- the current-carrying plate 26 has a width corresponding to the heating area 27 of the raw material powder 29 for sintering.
- the electrode 28 itself is designed to have the same width.
- the conductive plate 26 has a structure in which the mold is sandwiched from the left and right, but instead, a ring conductive ring which can freely move in the longitudinal direction of the mold 23 and is in close contact with the mold 23 is used. It can also be used. Also in this case, it has a width corresponding to the heating area of the raw material powder 29 for sintering as well.
- the powder 29 is loaded into a mold 23 having a cylindrical molding space, the elevation stage 34 is once fixed and the height position is adjusted, and then added from the upper end of the mold 23 The raw material sintered powder 29 is pressed by the pressing upper punch 24.
- the position of the current-carrying electrode 28 is aligned with the sintered portion of the raw material sintered powder 29 so as to set the upper and lower positions and start the current conduction.
- the current sintering is performed in a short time.
- adjustment of the stage position can be performed stepwise or continuously. It is also possible to adjust the stage position while energizing or disconnecting it.
- the stage position is arbitrarily adjusted stepwise or continuously, and simultaneously with or with the application of electric current simultaneously, the raw material sintered powder 2 9 is punched by pressing it from one end of the die 23. Can be pressed to sinter.
- a long rod can be sintered stepwise (continuously) stepwise while moving the portion to be sintered from the upper end of the mold 23 sequentially.
- the stage lift ram 22 which can be freely set, by adjusting the load by the current supplied to the electrode 28 and the load by the pressure ram 21, any position of the long material can be obtained. It can be sintered at any temperature while controlling the applied pressure.
- the cross-sectional shape (electrical resistance) in the material to be sintered changes, the absolute value of the difference in the calorific value at each position due to the shape change becomes smaller if the heating area is made smaller. Therefore, if the thickness t of the current-carrying plate 26 which determines the heating area to a degree that does not affect the quality of the sintering is made sufficiently thin, even a member having a non-uniform cross section can be sintered well.
- the present sintering method is characterized in that it is possible to sinter the sintered powder material 29 in one direction, and as described above, it is also possible to easily sinter the long sintered powder material 29. Have. In addition, it is possible to sinter the material whose cross section is not uniform while setting the heating part, for example, a rod-like body having a small diameter portion and a large diameter portion, that is, a rod-like body having a step can be easily sintered.
- the present invention has the remarkable feature of being able to easily sinter a long or odd rod-like material by a relatively simple device structure.
- Example 1 The results of the temperature distribution measured according to Example 1 are shown in FIG. It can be seen that the temperature decreases as it leaves the electrode connection plate 11. From this result, it can be seen that according to the present invention, only limited regions can be heated to the sintering temperature.
- the thickness t of the electrode connection terminal plate 11 is set sufficiently thin so as not to affect the quality of the sintering, even a member having a non-uniform cross section can be sintered well.
- an inner diameter of ⁇ ⁇ ⁇ 3 Omm, inner diameter 15 15 mm, length L 160 0 mm, made of Graphite cylinder, filled with 3.82 g of aluminum dioxide with an average particle diameter of 20 m. Then, hold it from the top and bottom with a 80 mm long Graphite punch.
- a cylinder with a mm 3 O mm hole in the center and a length of 70 mm on one side and a thickness of t 10 to 20 mm.
- Square plate) 1 1 is fitted to the side wall so as to be in intimate contact.
- a cross-sectional view of the heating unit in which the thermocouple 12 is present is shown in FIG.
- the method is not particularly limited to the electric heating method, and any method can be used.
- Electrode 1 Attach the electrode 1 to the terminal plate 11 so that it can be energized in the direction perpendicular to the pressure axis.
- a hole of 7 mm in depth is made through the terminal plate for electrode connection (square plate) in the center of the die (cylinder) 3 and temperature control and monitoring can be performed by inserting a thermocouple 12 used.
- the center part of the mold (cylinder) is heated to 580 ° C. to 640 ° C. by applying electricity between the electrodes while pressurizing with a load of about 10 kN, I made a conclusion.
- FIG. 1 An example of the result of measuring the temperature change of the mold (cylinder) in Example 2 is shown in FIG. It can be seen that the temperature on the opposite side of the material to be sintered almost agrees with the set temperature (corresponding to the control thermocouple) shown by the solid line, that is, for electrode connection embedded in a die (cylinder) It is understood that, even when current is supplied through the terminal plate 11, the temperature of the material to be sintered 2 can be controlled to a desired temperature.
- FIG. 9 shows the result of examining the density of the sintered aluminum product obtained in Example 2.
- the relative density showed a value of at least 99%. If the moving distance is increased, even longer products can be manufactured. Therefore, it is clear that the present method can produce a rod-like sintered product with excellent compactness.
- this example has a large diameter portion and a small diameter.
- the terminal plate 11 for electrode connection is used as the large diameter part 1 3 of the raw material powder. Install in In this case, make sure that the electrode connection terminal plate 11 does not get caught on the raw material powder of the small diameter portion 14.
- the conduction region is a heating region 15.sub.5 indicated by hatching.
- the powder located in the large diameter portion 13 is heated and sintered.
- the electrode connection terminal plate 11 is moved to the small diameter portion 14 and similarly electric heating is performed to sinter.
- the electric heating part is the central heating area 16 in the lower part of FIG.
- the terminal plate for electrode connection 1 1 should not get caught in the large diameter portion 1 3.
- energization can be performed independently according to the electrical resistance.
- the stepped portion can be uniformly sintered.
- the current may be stopped or a current of about heat retention may be supplied. This can be set arbitrarily.
- the thickness t of the electrode connection terminal plate 11 which determines the heating region is such that the difference in the calorific value does not affect the quality of the sintering. By making it sufficiently thin, it is possible to produce a good sintered product.
- the outer diameter 40 mm with a hole of diameter 15 mm, length L 100 mm, while the graphite cylinder type 3 is 3 mm, the length 10 mm is a punch 5 was inserted so as not to protrude from the lower end of cylinder 3 and 26.0 g of aluminum powder 9 having an average particle size of 20 was filled to prepare a sample for a sintering test.
- a punch 4 with a length of 4 O mm was attached to the top of the cylinder 3 and compacted with a load of 900 kgf. In this state, current is supplied between the electrodes 8 and heated to 650 ° C. In temperature control, a hole with a depth of 1 2. 0 mm opened at the center of the side surface located at a height of 8 0 mm from the lower end of the cylinder. The temperature was measured by the thermocouple inserted in the
- the present invention allows for production by sintering of good lengths as well as members whose cross-sectional shape is not uniform.
- the present invention proposes a method of sintering while moving the raw material and the electrode relative to each other, and it is not necessary to sinter the whole product at one time, so that the area to be heated can be reduced. is there.
- electricity is supplied through the electrode connection terminal plate attached to the mold, heat is generated only in the portion corresponding to the thickness of the electrode connection terminal plate. Therefore, if the thickness of the electrode connection terminal plate is reduced to the range where the cross section of the material to be sintered is uniform, the heat generation of the material to be sintered at that position becomes uniform.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003289384A AU2003289384A1 (en) | 2003-02-25 | 2003-12-17 | Sintering method and device |
US10/541,641 US20060104849A1 (en) | 2003-02-25 | 2003-12-17 | Sintering method and device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-46690 | 2003-02-25 | ||
JP2003046661A JP4119977B2 (ja) | 2003-02-25 | 2003-02-25 | 焼結方法 |
JP2003-46661 | 2003-02-25 | ||
JP2003046690A JP4119978B2 (ja) | 2003-02-25 | 2003-02-25 | 焼結装置及び焼結方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004076100A1 true WO2004076100A1 (ja) | 2004-09-10 |
Family
ID=32929635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016155 WO2004076100A1 (ja) | 2003-02-25 | 2003-12-17 | 焼結方法及び装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20060104849A1 (ja) |
AU (1) | AU2003289384A1 (ja) |
WO (1) | WO2004076100A1 (ja) |
Cited By (1)
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CN109586138A (zh) * | 2018-12-19 | 2019-04-05 | 西安赛尔电子材料科技有限公司 | 一种多针连接器玻璃烧结模具 |
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US10188119B2 (en) | 2001-07-16 | 2019-01-29 | Foret Plasma Labs, Llc | Method for treating a substance with wave energy from plasma and an electrical arc |
US9481584B2 (en) | 2001-07-16 | 2016-11-01 | Foret Plasma Labs, Llc | System, method and apparatus for treating liquids with wave energy from plasma |
US7622693B2 (en) | 2001-07-16 | 2009-11-24 | Foret Plasma Labs, Llc | Plasma whirl reactor apparatus and methods of use |
US8981250B2 (en) | 2001-07-16 | 2015-03-17 | Foret Plasma Labs, Llc | Apparatus for treating a substance with wave energy from plasma and an electrical Arc |
US7857972B2 (en) | 2003-09-05 | 2010-12-28 | Foret Plasma Labs, Llc | Apparatus for treating liquids with wave energy from an electrical arc |
US10267106B2 (en) | 2007-10-16 | 2019-04-23 | Foret Plasma Labs, Llc | System, method and apparatus for treating mining byproducts |
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US9560731B2 (en) | 2007-10-16 | 2017-01-31 | Foret Plasma Labs, Llc | System, method and apparatus for an inductively coupled plasma Arc Whirl filter press |
US11806686B2 (en) | 2007-10-16 | 2023-11-07 | Foret Plasma Labs, Llc | System, method and apparatus for creating an electrical glow discharge |
US9051820B2 (en) | 2007-10-16 | 2015-06-09 | Foret Plasma Labs, Llc | System, method and apparatus for creating an electrical glow discharge |
US9445488B2 (en) | 2007-10-16 | 2016-09-13 | Foret Plasma Labs, Llc | Plasma whirl reactor apparatus and methods of use |
US9761413B2 (en) | 2007-10-16 | 2017-09-12 | Foret Plasma Labs, Llc | High temperature electrolysis glow discharge device |
US9230777B2 (en) | 2007-10-16 | 2016-01-05 | Foret Plasma Labs, Llc | Water/wastewater recycle and reuse with plasma, activated carbon and energy system |
US9185787B2 (en) | 2007-10-16 | 2015-11-10 | Foret Plasma Labs, Llc | High temperature electrolysis glow discharge device |
US8904749B2 (en) | 2008-02-12 | 2014-12-09 | Foret Plasma Labs, Llc | Inductively coupled plasma arc device |
US10244614B2 (en) | 2008-02-12 | 2019-03-26 | Foret Plasma Labs, Llc | System, method and apparatus for plasma arc welding ceramics and sapphire |
CA2715973C (en) | 2008-02-12 | 2014-02-11 | Foret Plasma Labs, Llc | System, method and apparatus for lean combustion with plasma from an electrical arc |
WO2014093560A1 (en) | 2012-12-11 | 2014-06-19 | Foret Plasma Labs, Llc | High temperature countercurrent vortex reactor system, method and apparatus |
US9699879B2 (en) | 2013-03-12 | 2017-07-04 | Foret Plasma Labs, Llc | Apparatus and method for sintering proppants |
CN113932602B (zh) * | 2021-09-02 | 2023-10-31 | 山东晶盾新材料科技有限公司 | 一种用于快速热压烧结的自动化连续生产装置 |
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JPS53120612A (en) * | 1977-03-30 | 1978-10-21 | Inoue Japax Res Inc | Sintering apparatus |
JPS60101480A (ja) * | 1983-11-07 | 1985-06-05 | 石川島播磨重工業株式会社 | ホツトプレス装置 |
JPS62248553A (ja) * | 1986-04-19 | 1987-10-29 | Kubota Ltd | 二層中空筒体の製造方法 |
JPS63108191A (ja) * | 1986-10-27 | 1988-05-13 | 石川島播磨重工業株式会社 | ホツトプレス装置 |
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---|---|---|---|---|
US3340052A (en) * | 1961-12-26 | 1967-09-05 | Inoue Kiyoshi | Method of electrically sintering discrete bodies |
AU5498298A (en) * | 1997-01-20 | 1998-08-07 | Akane Co., Ltd. | Sintering method and sintering apparatus |
-
2003
- 2003-12-17 US US10/541,641 patent/US20060104849A1/en not_active Abandoned
- 2003-12-17 AU AU2003289384A patent/AU2003289384A1/en not_active Abandoned
- 2003-12-17 WO PCT/JP2003/016155 patent/WO2004076100A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53120612A (en) * | 1977-03-30 | 1978-10-21 | Inoue Japax Res Inc | Sintering apparatus |
JPS60101480A (ja) * | 1983-11-07 | 1985-06-05 | 石川島播磨重工業株式会社 | ホツトプレス装置 |
JPS62248553A (ja) * | 1986-04-19 | 1987-10-29 | Kubota Ltd | 二層中空筒体の製造方法 |
JPS63108191A (ja) * | 1986-10-27 | 1988-05-13 | 石川島播磨重工業株式会社 | ホツトプレス装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109586138A (zh) * | 2018-12-19 | 2019-04-05 | 西安赛尔电子材料科技有限公司 | 一种多针连接器玻璃烧结模具 |
Also Published As
Publication number | Publication date |
---|---|
US20060104849A1 (en) | 2006-05-18 |
AU2003289384A1 (en) | 2004-09-17 |
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