CN102423979A

CN102423979A - Hard alloy ball bead for gel pen and production method thereof

Info

Publication number: CN102423979A
Application number: CN2011102458398A
Authority: CN
Inventors: 张勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-25
Filing date: 2011-08-25
Publication date: 2012-04-25

Abstract

The invention relates to a hard alloy ball bead for a hard alloy pen, the hard alloy ball bead containsing tungsten carbide, cobalt, nickel, chromium and molybdenum and, which belongs to thea hard alloy ball bead for a gel pen manufactured by using a novel alloy material. By adopting the composition of the alloy material, not only good corrosion resistance, higher hardness and higher abrasive resistance are guaranteed, but the ball bead can be matched with gel pen ink made of various materials; and the ink outgoing amount of the ink gel pen is guaranteed to be steady and the gel pen is enabled to have a steady writing characteristic. Powdery raw materials of the alloy material are subjected to the processes of intensive mixing, pre-extrusion, formal extrusion, granulation, pelletizing, de-waxing, sintering, and the like to form a blank ball bead, and then the blank ball bead is flat ground, roughly ground, accurately ground, polished and screened to form a product ball bead.

Description

A kind of gel ink pen is with carbide alloy ball and production method thereof

Technical field

The present invention relates to a kind of novel pen and use ball, particularly a kind of production technical field that is suitable for the ball that gel ink pen uses.

Background technology

Because gel ink pen has the advantage of fountain pen and ball pen concurrently, fluent writing, writing is clear, therefore liked by people.Ball is one of critical component of gel ink pen, uses with water-based ink.Ink has corrosivity, and therefore, the gel ink pen ball must have corrosion resistance.Gel ink pen in use, ball rotates in pedestal, does not does not wear and tear in order to guarantee ball, ball must have higher hardness and wearability.In order to reach above-mentioned performance, more existing both at home and abroad research institutions or scholar specialize in ball.

Patent CN 101391365A (copper full needle-tube pen-point and processing technology), the patent for inventor Hu Tailin application adopts copper cylinder as nib, can reduce the cost of material, makes nib with stainless steel and can reduce cost 30%.This written shortcoming is: the hardness of copper is lower, causes the nib wearing and tearing in the use easily.

Patent CN 1283236A (improved point ball for ball point pens); Be contained in the patent of China's application for the inventor of Sandviken, Sweden Sandvik AB Silvio Tang; Its claim 1 is: a kind of carbide alloy ball pen spheroid; It is characterized in that it is the WC of 80-90, the TiC of 5-15 and the binding material phase composition of 7-10 by percentage by weight, 40-60, be preferably the nickel of 45-55; Less than 20, be preferably the molybdenum of 10-18; 15-40, be preferably the chromium of 30-40.The shortcoming of this ball is: the Hardmetal materials intensity of its use is low, and easy grinding, surface roughness are not low, and the tissue odds that behind sintering, forms of its alloy material is even simultaneously, so its combination property is poor.

Patent CN 1585699A (ball pen is with a pearl); Be the patent of the safe model of the inventor of company of Osaka, Japan Sakura Color Prod Corp. two-story valley in China's application; Its claim 1 is: a kind of ball pen is with a pearl; On this bead surface, have a plurality of holes; It is characterized in that; Said bead surface have said hole and not the par in this hole form, said par is made up of level and smooth minute surface, the major diameter of said Kong Youqi peristome less than 10

the hole constitute.The shortcoming of this pearl is: this pearl main material is a pottery, adopts injection moulding and vacuum pressed sintering process, apparatus expensive not only, and the batch process difficulty is bigger, so its cost is higher than the carbide alloy pen far away and uses ball.

Summary of the invention

The object of the present invention is to provide a kind ofly can be complementary with various inks, and guarantee that wearability is good, fluent writing, writing are clear, and writing is water-fast, sun-proof, and the holding time, long pen was used the carbide alloy ball.

Basic components of the present invention tungsten carbide, cobalt, nickel, chromium and molybdenum, wherein said tungsten carbide, cobalt, nickel, chromium and molybdenum, respectively, said alloy beads representing the total mass of 90% to 95%, 3% 5%, 2% to 4%, 1% to 2% and 0.5% to 1%.

The granularity of said tungsten carbide be 0.8 ~ 1.2

.

The present invention also provides a kind of production method: with tungsten carbide, cobalt, nickel, chromium and molybdenum powder body material and paraffin after fully mixed; Form the blank ball through extruding, granulation, group's ball, de-waxing and sintering again; Again the blank ball is passed through plain grinding, corase grind, correct grinding, polishing successively, form the finished product ball.The mass ratio that feeds intake of said tungsten carbide, cobalt, nickel, chromium and molybdenum powder body material is 90 ~ 95 ︰, 3 ~ 5 ︰, 2 ~ 4 ︰, 1 ~ 2 ︰ 0.5 ~ 1.

In order to make each raw material fully evenly mixed, the present invention proceeds to few twice extruding in advance earlier before extruding.

The property of the blank ball that forms through technology of the present invention is: hardness: HV 1500 ~ 1600; Bending strength:

; Density: 15 ~ 16

; Deviation from circular from:

; Dimensional tolerance range:

.

The performance of finished product ball is: surface roughness:

; Deviation from circular from:

.

Advantage of the present invention is: technology is simple, reasonable, and the product corrosion resistance is strong, hardness is high, wearability is good.Can be well be complementary fluent writing with the ink of various materials.

The specific embodiment

Produce in such a way:

1, the raw material mix: the particle size of 0.8 ~ 1.2

tungsten carbide, cobalt, nickel, chromium and molybdenum powder material to feed mass ratio of 90 to 95 ︰︰ 3-5 2-4 1-2 ︰︰ 1 ratio of 0.5 to 1 the bucket to the spherical bead mill and mixed for 48 hours, adding wax molding and drying with the dryer.

2, squeeze in advance:, powder and paraffin are fully mixed through squeezing in advance for several times.

3, formal extruding: according to the ball requirement of different size, on extruder, push in batches, and the oven dry of the material bar after will pushing.

4, granulate: according to the pelletizing on pelleter of concrete dimensional requirement.

The material section that 5, will cut and dry is packed into and is carried out a ball in the ball bucket, forms the blank ball.

6, de-waxing: the blank ball is put into the wax expelling furnace de-waxing.

7, sintering: the cooled blank ball of de-waxing is put into the vacuum sintering furnace sintering.

8, plain grinding: the blank ball behind the sintering is carried out plain grinding, remove corner angle and burr.

9, corase grind: divide several times to roughly grind according to actual conditions.

10, correct grinding: the ball after will roughly grinding finish grindes, polishing.

Claims

A method Gel carbide beads, base composition of tungsten carbide, cobalt, nickel, chromium and molybdenum, wherein said tungsten carbide, cobalt, nickel, chromium and molybdenum, respectively, of said alloy beads the total mass of 90% to 95%, 3% to 5%, 2% to 4%, 1% to 2% and 0.5% to 1%.
2. use the carbide alloy ball according to the said gel ink pen of claim 1, it is characterized in that: the granularity of said tungsten carbide be 0.8 ~ 1.2
.
3 Gel as claimed in claim 1, wherein the production of carbide beads, characterized in that the tungsten carbide, cobalt, nickel, chromium and molybdenum powder materials after mixing with paraffin, and then extruded, granulation, pelletization, ranked wax and sintered to form rough ball beads, beads and then followed through rough grinding, fine grinding, polishing, forming the finished beads; said tungsten carbide, cobalt, nickel, chromium and molybdenum powder material feed ratio of 90 to 95 ︰︰ 3-5 2-4 1-2 ︰︰ 0.5 to 1.
4. according to the said production method of claim 3, it is characterized in that before extruding, proceeding to earlier few twice extruding in advance.