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Competitive
products series: High-speed steel ejector pin |
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30 years' unremitting efforts in research contribute to the unique advantages of PUNCH high-speed ejector pins:
High speed steel materials with excellent properties purchased from Japan through dedicated channel.
Featuring high strength and excellent toughness. Known as Unbowed and Unbreakable Ejector Pin.
Free of plastic deformation and no change in hardness and toughness in the process of further treatment.
The minimum diameter of pin allowed for machining is 0.2mm with a precision up to 0.0002mm.
Multiple further processing such as surface chromium- and end engraving are available. |
PUNCH
Industry Surface treatment technology I ------------
Titanium- |
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| PUNCH Industry （ Dalian ） Co., Ltd. purchased a complete set of cleaning and titanium- equipment from Japan which cost 100 million Japanese yen, to enable in-house operation from machining to plating layer treatment, resulting in a shorter lead time and more consistent quality. |
Why common workpiece needs Titanium ?
The common workpiece can’t satisfy the operating requirements under tough conditions such as high temperature or high friction. Titanium can help common workpiece reduce the friction, increase the hardness, extend its service life and make it fit for tough working conditions. |
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I. New technology and new equipment (Completely Japanese technology and equipment)
1. Degreasing Cleaning Machine
If the workpiece is attached with water , oil and other impurities while being titanium plated, the will come off easily. Henceforth, the cleaning procedure is very important.
The rigid demand for indoor environment and stringent control over cleaning process at PUNCH Industry （ Dalian ） Co., Ltd. are beyond the reach of most domestic enterprises.
The cleaner consists of 7 sinks, automatic moving from sink to sink. Ultra-sonic means are employed to clean the mini-pores and even the inside of holes.
The operating environment is kept tidy and clean with a constant room temperature at 25℃ to prevent dewfall on the surface of workpiece, contributing to greatly extended service life of workpiece thanks to the close integrating of with the impurity-free surface. |
2.Treatment Furnace
Employing plasma electronic beam welding type and plasma electronic gun to result in smoother surface.
At PUNCH Industry （ Dalian ） Co., Ltd. there are two kinds of titanium- treatment available: PVD-TiN and PVD-TiCN.
1) PVD-TIN plating layer is single coating.
The gas is N2 (nitrogen) , Ti( cation )+N TiN
2) PVD-TICN plating layer , triple-coating
The close to substrate is TiN.
Nitrogen is used.
Ti(Cation)+ N TiN
On the second and third coating, C2H2 increased and N2 reduced.
Ti+C+H+N TiCN (H doesn't attach to the workpiece)
Caution: The operating temperature for PVD is between 450－500℃. Materials with annealing temperature lower than 500℃ are not fit for PVD treatment. |
二、Features and purposes of two kinds of plating layer.
1. Features of two kinds of plating layer. |
Kind of |
thickness of (μm) |
hardness of (HV) |
resistant to temperature (℃) |
Friction
coefficient
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color |
PVD-TiN |
2~3 |
2400(1600) |
400 |
0.6 |
red |
PVD-TiCN |
2~3 |
2700(1800) |
400 |
0.6 |
Garnet |
| Note: Since the plating layeris extra-thin, only the hardness in the parentheses can be detected when measuring with Vickers hardness scale.
2.Purposes
1） PVD-TiN
wearing and corrosion resistant, easy to demold, anti-scorification
Applicable examples: |
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Auto driving series parts
Avoid burning and melting |
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Punch Die
To increase the grinding resistance
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Spiral parts for injection
molding
To increase the grinding resistance |
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2）PVD-TiCN
Higher hardness , more compact and better resistance to wearing compared to TiN,
Applicable examples: |
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Blanking and Punching
To increase the wearing resistance |
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Blanking and Punching
To increase the wearing resistance |
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Mold for punch molding
To increase the wearing resistance |
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| The new equipment has been put to normal use this April. For domestic customers, please contact PUNCH offices in your area if necessary. |
PUNCH
Industry surface treatment technology II ----
chromium |
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Plates the hard chromium is refers ......
In metal/The nonmetallic superficial plating thin film technology, its method has the galvanization, the non-electrolysis galvanization, the vacuum coating, the welding coating and so on.
Mainly applies in the semiconductor seal mold, the plastic mold, the rubber forming mold and so on each kind of mold part and some equipment components galvanization processing. |
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Mold for semiconductor package |
Plastic Molds |
Mold for Rubber |
Particular advantages of chromium- at PUNCH Industry ( Dalian) Co., Ltd.
No change in size in the process of under low temperature.
The precision up to micron level. |
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Properties of chromium-plated products:
1. high hardness
Depending on the thickness of chromium-. May attain HV900 in terms of Vickers hardness. Protect the mold surface against scratching.
2. Corrosion-resistance
3. Excellent lubricating property
4. Abrasion and wearing resistance
5. Heat resistance
6. Attaching property:
Attach soundly to the substrate materials.
7. Reproducibility
It can be peeled off the substrate without damaging the substrate , so as to allow re-.
Technological Parameters for Chromium- at PUNCH Industry (For clients' reference) |
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Features |
Chromium- of PUNCH |
No ectrolytic nickel |
TiN |
Common Features |
Kinds of |
Electro- |
Chemical- |
plating layer |
Structure of coating |
crystalloid |
Non- crystalloid |
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Hardness (Hv) |
900 |
No heat treatment 500 |
1900-2400 |
Subject to heat treatment 1000 |
Melt point |
1900 |
890 |
2950 |
Density (g/cm3) |
7.19 |
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5.43 |
Heat expanding coefficient |
12.9X10-6 |
13.0X10-6 |
8.3X10-6 |
Resistance (Ω) |
13 |
60X10-3 |
22 |
magnetism |
No |
No heat treatment, no magnetism |
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Subject to heat treatment, with magnetism |
Color |
Glossy silver |
Glossy gold |
Glossy gold |
Gloss |
○ |
△ |
○ |
Evenness of coating |
1μm以下 |
◎ |
○ |
◎ |
1~10μm |
○ |
○ |
○ |
10~20μm |
△ |
△ |
△ |
20μm以上 |
X |
X |
X |
Coating thickness |
0.5~200μm |
1~200μm |
0.5~10μm |
Corrosion resistance |
○~△ |
◎ |
○ |
adhesion property |
○ |
△ |
◎ |
Wearing resistance |
◎ |
△ |
○ |
Note ： ◎： Very Applicable ○： Applicable △： Possible X： Not Applicable
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Classification |
Chromium- of PUNCH |
No ectrolytic nickel |
TiN |
Property of materials |
Mold tool |
High-speed steel (bath) |
○ |
○ |
○ |
High-speed steel (powder) |
○ |
○ |
○ |
Cold-pressing tool steel |
○ |
○ |
△ |
Hot-pressing tool steel |
○ |
○ |
△ |
Super-hard |
X |
○ |
○ |
Mechanical part |
SS,SC,SCM materials |
○ |
○ |
○ |
Aluminum |
X |
○ |
○ |
Copper Alloy |
○ |
○ |
○ |
Decoration |
Steel body |
○ |
○ |
○ |
nonferrous metal |
X |
○ |
○ |
Equipment involved in the electro product line
1. 500L bath（800W×800L×1000H）….. 5 sinks
Bath for semi-conductor
2. rectifier (1500A)…… 5 sets
3. drainage …. 1 set
4. water recycling equipment …. 1 set |
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| At PUNCH, chromium- is available for substrate of various materials to meet the customer's demand for low cost and added value. |
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PUNCH
Industry surface treatment technology III-------
Rheological Finishing |
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Finishing is one of the essential procedures in mold processing. The finishing quality is very important to the mold quality. With the diversification of cavity shape, and increasingly stringent demand on precision, finishing is becoming more and more difficult . In many fields, traditional finishing means can't meet the demand of customers any more. For example: The cold extrusion female die as shown in the following (Technical requirements: tolerance±0.01 Roughness : Ra0.1) |
Sectional View of Shape Parts
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The cavity of this die was made by wire cutting process, and need further finishing to improve its surface quality by removing the “white layer” formed in wire cutting process. The traditional means is to cut the white layer with a supersonic tool followed by further finishing with a polishing wheel or abrasive stick, which will take a few hours and provide no guarantee for size and shape precision. And in case of mass production, the compatibility amongst parts will be a problem. In order to solve this problem, a myriadof solutions have been given by manufacturers respectively . The follows are our solutions:
We employ Rheological Finishing to solve the above-mentioned problem. Its principles are as follows: Mixthe workpiece with diamond dust and put them into the working cylinder which is air-tight. The finishing dusts remain running at high speed under high pressure with the help of the oil pressure unit of Rheological Finishing Machine , and pass through the space between the surface-to-be-finished and the tools repeatedly to polish the surface of workpiece by means of grinding. The finishing dust can flow into anywhere like liquid under high pressure, which allows finishing of those small grooves, pores and holes on the surface of workpiece, and results in both high surface finish and high size and shape precision. |
Rheological Finishiing Machine
This hydrofinish technology presently is only applicable for the moldcavities with through holes and exterior grooves on small components. The workpiece to be processed shall not be too large. E.g., The scope of workpiece to be processed with the hydrofinish machine of PUNCH
Industry Dalian isφ80×H260, i.e., the excircle of cavity to be polished shall not exceedφ80 and the height shall not exceed 260mm.
In spite of the restriction on the applications of hydrofinish technology, it has contributed much to the improvement of polishingtechnology. Compared to traditional polishing technology, the most significant benefit of hydrofinish technology is to greatly improve
the polishing efficiency and effects of shape products and products with a deep hole, resulting in the high interchangeability of large amount of products to be polished. In a word, the hydrofinish technology, as one of the high performance polishing means, will find extensive
applications.
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