WO1992000850A1 - Pieces constitutives de la tete d'impression d'une imprimante par points du type a impact, et procede de production - Google Patents
Pieces constitutives de la tete d'impression d'une imprimante par points du type a impact, et procede de production Download PDFInfo
- Publication number
- WO1992000850A1 WO1992000850A1 PCT/JP1991/000038 JP9100038W WO9200850A1 WO 1992000850 A1 WO1992000850 A1 WO 1992000850A1 JP 9100038 W JP9100038 W JP 9100038W WO 9200850 A1 WO9200850 A1 WO 9200850A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- members
- component
- print head
- dot printer
- binder
- 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.)
- Ceased
Links
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
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- the present invention relates to a part constituting a print head for a wire dot type dot printer and a method of forming the same. Background technology
- print heads for wire impact type dot blinds are generally provided in the nose frame a, the core block b fixed to the back of the nose frame a, and the center hole of the core block b.
- Koapuro click b constituting the magnetic circuit for example of each of these components, it is configured to couple a large number of core b 2 formed by material such as large Bame Njiyuru saturation magnetic flux density on the base frame consisting of soft iron
- the printing lever has a structure in which a lever £ e and a fulcrum pin £ 3 are connected to a plunger ⁇ , made of permendur, etc., and these components are integrally connected. This requires considerable man-hours.
- the core block b no matter how the base frame and the core are connected, there is a slight gap between them and magnetic loss occurs.
- the second and fulcrum pins 3 are likely to be damaged, resulting in inconveniences such as unstable wire behavior and adversely affecting responsiveness. Disclosure of the invention
- the present invention has been made in view of such a problem, and an object of the present invention is to provide a new wire impact type dot head component in which a plurality of members are integrated by sintering. In addition, it is an object of the present invention to propose a new method for forming a head component that can easily and surely integrate a plurality of members.
- At least one of the components configured as a combination of a plurality of members is formed using metal powder.
- at least one member constituting the component is made of metal by integrating with another member that has been previously formed. It is formed by injection molding using powder, and then, in the process of sintering, other preformed members are combined and sintered integrally.
- the present invention in the process of molding and sintering at least one of a plurality of members constituting the magnetic circuit component for a print head by injection molding using metal powder, Since the member is combined with another preformed member and sintered integrally, multiple members can be easily combined and integrated without requiring special processing accuracy of the joint. Thus, the number of assembly steps and the number of parts can be greatly reduced, and a gap between members can be eliminated to form a magnetic circuit component with almost no magnetic loss. Moreover, it is possible to mold only necessary parts as parts having expensive high magnetic permeability material or the like, so that the printing head can be configured at lower cost. BRIEF DESCRIPTION OF THE FIGURES FIGS. 1 and 2, FIGS. 3 and 4 and FIGS.
- FIG. 5 and 6 are perspective views showing the steps of combining and integrating the components for printing the printheads, and the process diagrams thereof.
- FIG. 7 is a perspective view showing a step of connecting and integrating components for a print head
- FIG. 8 is a view showing an example of a print head for a wire impact type dot printer.
- FIG. 1 and FIG. 2 show a method of forming a core block 1 constituting a magnetic circuit.
- the base frame 2 is a powder of a magnetic material having a diameter of 3 to 25 wm, such as pure iron Fe or 3% silicon steel Fe-Si, to which 5 to 60% by volume of an organic binder is added and kneaded. .
- This is used as an original base frame with an injection pressure of 300 to 300 O kgf / cm 2 by an injection molding machine and a central circular hole 3 on the inner bottom surface and a number of core mounting holes 4 surrounding it.
- an injection pressure 300 to 300 O kgf / cm 2 by an injection molding machine and a central circular hole 3 on the inner bottom surface and a number of core mounting holes 4 surrounding it.
- the base frame 2 formed by injection molding is rich in processability only by being joined by a binder, so that the gate residue can be easily removed. Further, the liner can be ground and kneaded and used again for injection molding, so that the base frame 2 can be made inexpensive.
- de-binder treatment is performed, for example, by holding at 50 ° C to 200 ° C for 1 hour to 3 hours and then at 300 ° C to 700 ° C for 2 hours to 60 hours in an inert gas or vacuum. .
- the organic binder is removed from the base frame 2.
- the other core 5 is made of a component having a large saturation magnetic flux density (Fe—Co—V alloy) or a 3% silicon steel Fe—Si or nickel having a high magnetic permeability.
- -A powder of a metal alloy Fe—Ni is kneaded together with a binder in the same manner as described above, and this is formed by injection molding to form an original shape of a core having a projection 6 attached to the lower surface, and subjected to a binder removal treatment.
- the two cores are joined so that the mounting projections 6 of the core prototype are fitted into the mounting holes 54 of the base frame prototype. That is, by making the shape of the base frame mounting hole 4 substantially rectangular parallelepiped and making the shape of the core mounting projection 6 substantially the same as the above substantially rectangular parallelepiped shape, the positions of the base frame 2 and the core 5 can be easily determined. In addition, the position of the step 6a of the mounting protrusion 6 of the core abuts on the bottom 4a of the base frame so that the position is easily determined.
- the jig 17 has a groove 17 a having a shape corresponding to the core 5, and the core 5 is inserted into the groove 17 a.
- the depth of the groove 1a is set so that the step 6a of the protrusion 6 of the core 5 is higher than the upper surface 17b of the jig.
- the core 5 is set on the jig 17, and the mounting projection 6 of the core 5 is formed into, for example, a substantially cylindrical shape, and the hole 4 of the base frame 2 is formed.
- the interface between the base frame 2 and the core 5 is welded during sintering, and the base frame 2 and the core 5 are integrally joined without any gap, so that the core block 1 with almost no magnetic loss 20 is formed. can get.
- FIGS. 3 and 4 show a method of forming the print lever 7.
- the lever piece 9 is made of a plate made of a high-strength material such as pure iron Fe or 3% silicon steel Fe-Si or stainless steel.
- the fulcrum pin 10 is formed in advance by cutting or the like from a wire made of carbon steel or the like. These powders are mixed with a powder of an alloy having a high saturation magnetic flux density or high permeability, such as Permendule F e-C ⁇ 1 V, and an organic binder to form a plunger with a molding die, and the injection molding is performed by the insert method.
- the plunger 8 is integrally molded with the original shape. Then, binder removal processing is performed, and these are sintered in a vacuum or in an atmosphere of an inert gas.
- Another method is to knead a binder with powder of high saturation magnetic flux density or high magnetic permeability alloy such as Fe-Co-V, and form a blender 8 by injection molding.
- the print lever piece 9 and the fulcrum pin 10 may be connected, and this may be sintered in a vacuum or in an atmosphere of an inert gas.
- FIGS. 5 and 6 show a method of forming the yoke 11.
- a disk-shaped yoke 1 provided with a number of radial grooves 13 and fulcrum pin insertion recesses 1 4.
- a dish-shaped yoke 15 provided with a large number of radial grooves 16 and pure iron F e, silicon steel F e- S i or permendur (F e- (0 0- ⁇ alloy) powder and a binder are kneaded and molded by injection molding, followed by binder removal. Then, these radial grooves are polymerized so that the original shapes of the yokes 12 and 15 are aligned with each other so that the radial grooves 13 and 16 match each other, and these are fired in a vacuum or in an atmosphere of an inert gas. Tie.
- the yokes 12 and 15 which have not been able to be integrated until now are integrally molded as a single yoke 11. Since the yoke 11 is sintered after injection molding the fine powder together with the binder, pores smaller than the fine powder remain in the portion where the binder 1 exists. Since the pores are impregnated with lubricating oil, a porous yoke having a small magnetic loss and a self-lubricating property should be configured as a yoke 11 capable of operating the printing lever 7 smoothly and reliably. Can be.
- the present invention has been described above with reference to an example of a component applied to a general suction type wire impact type dot head, the present invention employs a permanent magnet in addition to this.
- the present invention can also be applied to the yoke used for the used store energy type dot head.
- the permanent magnet is formed in advance using a material such as samarium-cobalt or a neodymium, and the yoke is sintered or pressed using a material such as pure iron Fe or silicon steel Fe-Si. Formed in advance by processing. Then, these are mixed in a process of injection molding for kneading powder of ferromagnetic material such as silicon steel Fe-Si or permendur Fe-Co-V and a binder to form a base frame original shape. Integrate with base frame by saint method After sintering, sinter.
- the yoke constituting the magnetic circuit can be formed with as little magnetic loss as possible.
- the present invention is used for an impact dot head of a dot type printer, and can be applied to all types of dot impact printers that will spread in the future. It will contribute.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Impact Printers (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HK98104186A HK1005021A1 (en) | 1990-07-12 | 1991-01-17 | Method of producing component parts of print head for wire impact type dot printer |
| DE69125355T DE69125355T2 (de) | 1990-07-12 | 1991-01-17 | Verfahren zur herstellung von druckkopfbauteile für nadelpunktanschlagdrucker |
| EP91902764A EP0491950B1 (en) | 1990-07-12 | 1991-01-17 | Method of producing component parts of print head for wire impact type dot printer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18678890A JPH03130306A (ja) | 1989-07-13 | 1990-07-12 | ワイヤインパクト式ドットプリンタ用印字ヘッドの構成部品とその成形方法 |
| JP2/186788 | 1990-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992000850A1 true WO1992000850A1 (fr) | 1992-01-23 |
Family
ID=16194603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1991/000038 Ceased WO1992000850A1 (fr) | 1990-07-12 | 1991-01-17 | Pieces constitutives de la tete d'impression d'une imprimante par points du type a impact, et procede de production |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5401107A (ja) |
| EP (1) | EP0491950B1 (ja) |
| KR (1) | KR100189304B1 (ja) |
| DE (1) | DE69125355T2 (ja) |
| HK (1) | HK1005021A1 (ja) |
| SG (1) | SG48222A1 (ja) |
| WO (1) | WO1992000850A1 (ja) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5393484A (en) * | 1991-10-18 | 1995-02-28 | Fujitsu Limited | Process for producing sintered body and magnet base |
| US5641920A (en) * | 1995-09-07 | 1997-06-24 | Thermat Precision Technology, Inc. | Powder and binder systems for use in powder molding |
| DE102004006954A1 (de) * | 2004-02-12 | 2005-09-01 | Basf Ag | Verfahren zum Verbinden von anorganischen, aus Pulverspritzgussmassen durch Spritzgießen hergestellten Formkörpern mit nach einem anderen Verfahren als Spritzgießen hergestellten anorganischen Formkörpern |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56131906A (en) * | 1980-03-19 | 1981-10-15 | Nec Corp | Actuator |
| JPH01299054A (ja) * | 1988-05-27 | 1989-12-01 | Tokyo Electric Co Ltd | 釈放型ドツトプリンタヘツド |
| JPH0672747A (ja) * | 1992-08-24 | 1994-03-15 | Denki Kagaku Kogyo Kk | 注入用セメント混和材及びそれを用いた注入材 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3672482A (en) * | 1970-08-31 | 1972-06-27 | Ibm | Wire matrix print head |
| US4230038A (en) * | 1977-06-23 | 1980-10-28 | Helmut Falk | Matrix print head assembly |
| US4230412A (en) * | 1978-03-17 | 1980-10-28 | Helmut Falk | Matrix print head assembly |
| US4425299A (en) * | 1980-09-24 | 1984-01-10 | Sumitomo Electric Industries, Ltd. | Method for bonding sintered metal pieces |
| US4661002A (en) * | 1983-08-19 | 1987-04-28 | Canon Kabushiki Kaisha | Dot matrix printer |
| JPS6072747A (ja) * | 1983-09-29 | 1985-04-24 | Toshiba Corp | 印字ヘツド |
| US4652157A (en) * | 1983-12-21 | 1987-03-24 | Kabushiki Kaisha Toshiba | Printing wire |
| US4722824A (en) * | 1986-06-04 | 1988-02-02 | Fine Particle Technology Corp. | Method of joining green bodies prior to sintering |
| US4833980A (en) * | 1987-08-31 | 1989-05-30 | Mannesmann Tally Corporation | High efficiency coil posts for print hammer actuators |
| JPS6465099A (en) * | 1987-09-07 | 1989-03-10 | Hitachi Cable | Production of gaas single crystal |
| JP2588272B2 (ja) * | 1988-05-30 | 1997-03-05 | 川崎製鉄株式会社 | Fe−Co系焼結磁性材料の製造方法 |
| DE3917277C2 (de) * | 1989-05-24 | 1994-01-20 | Mannesmann Ag | Verfahren und Vorrichtung zur Herstellung von Fertigteilen als Verbundkörper aus pulverförmigen Werkstoffen |
| DE69024582T2 (de) * | 1989-10-06 | 1996-05-15 | Sumitomo Metal Mining Co | Stahllegierung zum Anwenden in spritzgegossenen pulvermetallurgisch hergestellten gesinterten Formkörpern |
-
1991
- 1991-01-17 HK HK98104186A patent/HK1005021A1/en not_active IP Right Cessation
- 1991-01-17 KR KR1019920700549A patent/KR100189304B1/ko not_active Expired - Fee Related
- 1991-01-17 EP EP91902764A patent/EP0491950B1/en not_active Expired - Lifetime
- 1991-01-17 SG SG1996008065A patent/SG48222A1/en unknown
- 1991-01-17 WO PCT/JP1991/000038 patent/WO1992000850A1/ja not_active Ceased
- 1991-01-17 DE DE69125355T patent/DE69125355T2/de not_active Expired - Fee Related
-
1994
- 1994-03-04 US US08/206,920 patent/US5401107A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56131906A (en) * | 1980-03-19 | 1981-10-15 | Nec Corp | Actuator |
| JPH01299054A (ja) * | 1988-05-27 | 1989-12-01 | Tokyo Electric Co Ltd | 釈放型ドツトプリンタヘツド |
| JPH0672747A (ja) * | 1992-08-24 | 1994-03-15 | Denki Kagaku Kogyo Kk | 注入用セメント混和材及びそれを用いた注入材 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0491950A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920702292A (ko) | 1992-09-03 |
| DE69125355D1 (de) | 1997-04-30 |
| KR100189304B1 (ko) | 1999-06-01 |
| HK1005021A1 (en) | 1998-12-18 |
| EP0491950B1 (en) | 1997-03-26 |
| US5401107A (en) | 1995-03-28 |
| EP0491950A1 (en) | 1992-07-01 |
| DE69125355T2 (de) | 1997-07-03 |
| SG48222A1 (en) | 1998-04-17 |
| EP0491950A4 (en) | 1993-09-29 |
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