JPS5926272A - Wire bearing plate for dot printer - Google Patents

Abstract

PURPOSE:To improve workability and enhance abrasion resistance, by a method wherein a surface of a metallic wire bearing plate is coated with a film having a high hardness and a high abrasion resistance which are characteristic of ceramics, thereby constituting a wire bearing for a dot printer. CONSTITUTION:A high-speed steel made wire bearing plate for a dot printer is subjected to ultrasonic cleaning in trichloroethylene, and after sufficiently degreasing, it is placed in an ion plating device, and Ti metal of a purity of not lower than 99.9% is simultaneously set as a material to be evaporated. Then, the interior of the device is evacuatd to a high degree of vacuum of not lower than 10<-5> Torr, an argon gas is introduced into the device to 5X10<-4> Torr, and a nitrogen gas is introduced into the device to 1X10<-3> Torr. A DC voltage of 2kV is impressed on a holder part of the electrically insulated wire bearing plate, thereby causing an electric discharge, simultaneously with which the Ti metal is evaporated by heating by an electron beam.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a bearing plate for a dot printer, and particularly relates to an improvement of a bearing plate for a dot printer. - This relates to improving the wear resistance of bearing plates.

The bearing plate for printers currently in general use has uneven wear on the edges 1n1 due to repeated printing, and as a result, the printed shape becomes unclear. This has become a problem. Therefore, as a method to improve the above problem, cemented carbide or Shinomics plate materials have been adopted. However, these materials have excellent wear resistance. However, it is difficult to process, and has disadvantages such as having to be high (= 1) () (Therefore, it is hoped that a 7-bearing with improved machinability + 41 ≧ 1 will appear. There is C.

The present invention has been made in order to meet the above needs,
Wi-V for dot printers with excellent workability and less uneven wear
- The purpose is to provide bearing materials.

In order to achieve the above object, the present invention takes advantage of the good workability peculiar to metals, uses this as a base material, and coats the surface with a highly hard and wear-resistant coating unique to ceramics. The present invention is characterized by a bearing plate for dot printers which has a long life with little wear.

In the present invention, the tightness between the base material and the coating is extremely important, and it is desirable to use a CVD method (chemical vapor deposition method), a molten salt method, an ion blating method, etc. as a coating method. Further, as the coating in the present invention, T'i
C, Ti N, Ti (CN), VC, AI, 0
3 carbides, nitrides, etc. Illide, carbide carbonitride lamix coatings are suitable.

The present invention will be explained in detail below according to examples.

First, the high-speed steel drum 1 to the printer's Y-V bearing plate were ultrasonically cleaned in Triclean and thoroughly degreased. This treated soy-7- is placed in an ion oxide jetting apparatus, and 11 metals containing 999% or more J- pure 1a are also simultaneously retarded as an evaporation abrasive. Then 10
1 square evacuated to a high vacuum higher than Torr, j? Rougon gas is introduced to 5 X 1 (,)-q orr, and nitrogen gas is further introduced to I X 'I 0-3-1- orr. A direct current of 2 KV is applied to a part of the holder of the electrically insulated soi)7-bearing plate to generate a discharge, and at the same time, the l-i metal is heated by the electron beam C and evaporated. This state was maintained for about 15 minutes, and a 11N film with a thickness of about 2 μm was formed on the surface of the Soy A7 bearing plate to produce a Soy\7 bearing plate made of high speed steel for a dot printer with a N coating. I, 21.1-Results of a practical wear test of the TiN-coated Soy X/- blade of the present invention and a conventional metal Soy-7 bearing plate revealed that it lasted for more than 1000 hours. After using the J3 for a long time, the print using the conventional Soi A7- was unclear, but the sharpness of the print itself was improved by using the J3 Soi X7-bearing plate according to the present invention. Although there is almost no change -)/, :. The results of the above practical tests confirmed that the wear resistance was improved.

As described in detail above, according to the present invention, it is possible to realize a soi A7-type with an extremely long life compared to the conventionally used metal soybean A7-bearing plate for printers. It's a person.

It should be noted that the performance is almost the same as that of the conventional ceramic Soy A7 bearing plate, and the cost can be reduced by about half, which is a great industrial effect.

Procedural amendment (0 button 1 Akira ■116) il i ``Paper No. 131590
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Story E Tokyo 284-4642 Ura 11゛K.1 Photoill book ``Detailed Description of the Invention'' t+l.

Contents of amendment L The entire statement in the "Detailed Description of the Invention" column of the specification is corrected as follows.

(1) "Coach, ng" in line 8 of page 2 of the specification is corrected to "coating."

(2) On page 4, line 4 of the circular, "% yearga" is corrected to "wire ga".

that's all

Claims (1)

[Claims] A wire bearing plate for a printer, characterized in that the surface of the metal wire bearing plate is coated with a hard coating.