JPH0624738B2 - Transfer molding pot / plunger - Google Patents
Transfer molding pot / plungerInfo
- Publication number
- JPH0624738B2 JPH0624738B2 JP15997989A JP15997989A JPH0624738B2 JP H0624738 B2 JPH0624738 B2 JP H0624738B2 JP 15997989 A JP15997989 A JP 15997989A JP 15997989 A JP15997989 A JP 15997989A JP H0624738 B2 JPH0624738 B2 JP H0624738B2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- cemented carbide
- transfer molding
- resin
- pot
- 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.)
- Expired - Fee Related
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は耐摩耗性に優れた、トランスファー成型用ポッ
ト・プランジャーの超硬合金工具に関するものである。TECHNICAL FIELD The present invention relates to a cemented carbide tool for a pot plunger for transfer molding, which has excellent wear resistance.
一般に、電子部品の封止方法として、製品形状を彫り込
んだ上下金型をしめておき、粉末を押し固めた封止材
（熱硬化性樹脂）を金型内に組み込まれたポットに仕込
み、それを加熱、可塑化し、プランジャーで押しだし、
移送して硬化成形するトランスファーモールドが行なわ
れている 近年、電子素子の高集積化に伴い、配線パターンや素子
チップの大型化が進み、封止樹脂の強度がより求められ
るようになり、そのため、ポット・プランジャーの摩耗
が激しくなり、超硬合金製品特にＪＩＳ Ｖ３〜Ｖ５相
当品が増加してきている。Generally, as a method of sealing electronic parts, the upper and lower molds engraved with the product shape are squeezed, and the encapsulating material (thermosetting resin) that compacts the powder is placed in a pot incorporated in the mold, Heat, plasticize, push out with a plunger,
In recent years, transfer molding has been carried out in which the resin is transferred and cured. With the higher integration of electronic elements, the size of wiring patterns and element chips has increased, and the strength of the sealing resin has become more demanding. The wear of pots and plungers has become severe, and the number of cemented carbide products, especially JIS V3 to V5 equivalent products, has increased.
一方超硬合金、特に超微粒子超硬合金に関しては、ＷＣ
粒子を微細化し、粒抑制材として、ＴａＣ，Ｃｒ，Ｖ等
を少量添加し、Ｃｏで結合した合金が用いられその強靭
性を特長とし、優れた耐摩耗性と強靭性を兼ね備えてお
り、広く実用に供されている。On the other hand, for cemented carbide, especially ultrafine grained cemented carbide, WC
The alloy is made finer and has a small amount of TaC, Cr, V, etc. added as a grain suppressor, and is bonded with Co. It is characterized by its toughness and has both excellent wear resistance and toughness. It is put to practical use.
しかし、超硬合金を使用した場合、樹脂が加工時に発生
するガスにより超硬合金が腐食され、そのまま使用を継
続して行くと、腐食部分に樹脂が付着、特に樹脂中に含
まれるシリカ粒子が食い込み、プランジャー外周に軸方
向の傷が発生し、そこに溶融樹脂やシリカ粒子等が浸入
堆積し、プランジャーの作動をさらに妨害するようにな
る。However, when the cemented carbide is used, the cemented carbide is corroded by the gas generated during the processing of the resin, and if it continues to be used as it is, the resin adheres to the corroded portion, especially the silica particles contained in the resin. When it digs in, an axial scratch is generated on the outer circumference of the plunger, and molten resin, silica particles, etc. infiltrate and accumulate there, further hindering the operation of the plunger.
また、同様な現象はポット内壁に於いても、腐食によ
り、斑点状に傷がつき、そこにプランジャーと同様、樹
脂が付着し、作動しなくなる問題点があった。In addition, the same phenomenon has a problem that even on the inner wall of the pot, the spot is scratched due to corrosion, and the resin adheres to the spot, like the plunger, so that the pot does not operate.
本発明の目的は、使用初期に発生する腐食に対して、腐
食性を向上させた超硬合金を使用するとともに高硬度化
を計り、プランジャーの長寿命化を計ることである。It is an object of the present invention to use a cemented carbide with improved corrosiveness against corrosion occurring in the initial stage of use, increase hardness, and extend the life of the plunger.
本発明は上記観点に基ずいて成されたものであり、トラ
ンスファー成型用ポット・プランジャーをＷＣ基超硬合
金において、結合相が８〜２０％のＣｏ−Ｃｒ系合金か
らなるＷＣ基超硬合金において、その焼結体の平均粒度
が０．８ミクロン以下より成ることを特長とするもので
ある。The present invention has been made based on the above-mentioned viewpoint. A pot plunger for transfer molding is a WC-based cemented carbide and a WC-based cemented carbide having a binder phase of 8 to 20% of a Co-Cr alloy. The alloy is characterized in that the average grain size of the sintered body is 0.8 μm or less.
粒度を細かくすることは、結合相のｍｅａｎ ｆｒｅｅ
ｐａｔｈを薄くし、耐腐食性を向上させると共に、腐
食により初期に生ずる斑点状の傷を著しく少なくし、そ
の後に生ずる軸方向の傷等も減少させ、長寿命化を計
る。Finer particle size means mean free phase of binder phase
The path is thinned to improve the corrosion resistance, and the speckled scratches initially generated by the corrosion are significantly reduced, and the axial scratches and the like thereafter are also reduced to prolong the life.
Ｃｏ−Ｃｒ結合相は、樹脂を予熱する段階で発生するガ
スによる腐食に対し、結合相の耐食性を高め、初期損傷
を著しく減少させる。The Co-Cr binder phase enhances the corrosion resistance of the binder phase against the corrosion caused by the gas generated in the step of preheating the resin, and significantly reduces the initial damage.
本発明による超硬合金の組成及び平均粒度は以下の理由
により限定される。The composition and average grain size of the cemented carbide according to the present invention are limited for the following reasons.
１）結合相のＣｏ−Ｃｒ系合金の含有量が８％未満では
結合金属の量が十分でなく、靭性を十分に与えられず、
また２０％を越えると相対的にＷＣ含有量が減少し著し
く、耐摩耗性を阻害するために、８〜２０％とした。ま
たＣｒの添加量はＣｏ中に固溶する量以下であれば良
く、Ｃｒが単相に生じるような添加量では靭性を阻害す
るため、好ましくない。1) When the content of the Co—Cr alloy in the binder phase is less than 8%, the amount of the binder metal is not sufficient and the toughness is not sufficiently given,
On the other hand, if it exceeds 20%, the WC content is relatively decreased, and the wear resistance is impaired. Further, the addition amount of Cr may be equal to or less than the amount of solid solution in Co, and the addition amount of Cr in a single phase hinders the toughness, which is not preferable.
２）焼結体における平均粒度はイメージアナライザーに
よる粒度測定で、その平均粒度が０．８ミクロン以下で
あれば、結合金属のｍｅａｎ ｆｒｅｅ ｐａｔｈ が
十分に薄くなり結合金属のプールが生じにくく、問題点
の項に述べた斑点状の腐食、及びシリカ粒子による軸方
向の傷が生じ難くなるためである。2) The average particle size of the sintered body is measured by an image analyzer, and if the average particle size is 0.8 micron or less, the mean free path of the bonding metal is sufficiently thin and a pool of the bonding metal is hard to occur, which is a problem. This is because the speckled corrosion and the axial scratches caused by the silica particles are less likely to occur as described in the item (1).
更に、該超硬合金において、粒抑制を目的とした、Ｖ、
ＴａＣ等の添加は有効であり、平均粒度をより細かくす
る効果があるが、耐食性の改善には無関係であり、Ｃｒ
との複合添加により効果を発揮するものである。Further, in the cemented carbide, for the purpose of grain suppression, V,
Addition of TaC, etc. is effective and has the effect of making the average grain size finer, but it is irrelevant to the improvement of corrosion resistance, and Cr
The effect is exhibited by the combined addition of and.
以下本発明を実施例に基づき詳細に説明する。Hereinafter, the present invention will be described in detail based on examples.
市販のＷＣ粉末（平均粒度０．６μｍ及び２．５μ
ｍ）、Ｃｒ粉末（同２．０μｍ）、ＴａＣ粉末（同１．
０μｍ）及び、Ｃｏ粉末を使用し第１表に示す組成で作
成した。また比較のため９０ＷＣ−９．１Ｃｏ−０．９
Ｃｒの組成になるようＷＣ２．５ミクロンの粉末を使用
して、ＪＩＳＶ４相当の合金も製作した。これらの粉末
を混合後、乾燥し、１４００゜Ｃ１時間焼結したのち、
所定の形状に加工した。Commercially available WC powder (average particle size 0.6 μm and 2.5 μm
m), Cr powder (2.0 μm in the same), TaC powder (same as 1.
0 μm) and Co powder were used to prepare the composition shown in Table 1. For comparison, 90WC-9.1Co-0.9
An alloy corresponding to JIS V4 was also manufactured by using a powder of WC2.5 micron so as to have a Cr composition. After mixing these powders, drying and sintering at 1400 ° C for 1 hour,
It was processed into a predetermined shape.
また、物性、ミクロ組織上の変化を確認するため、上記
チップを研磨、ラップした後、硬さ、破壊靭性値を測定
した。その結果も併せ第１表に示す。Further, in order to confirm changes in physical properties and microstructure, the chips were polished and wrapped, and then hardness and fracture toughness values were measured. The results are also shown in Table 1.
また、粒度は電子顕微鏡による組織観察を行ない、その
写真よりイメージアナライザーで測定した。The grain size was determined by observing the structure with an electron microscope and using an image analyzer from the photograph.
本発明と比較例の測定結果は、本発明はＷＣ相の平均粒
度が０．５５〜０．７５μｍであり、比較例は２．３μ
ｍとなっていた。さらに、シングルタイプトランスファ
ーモールド型において実際の樹脂封止作業にてその性能
を確認した。その概略を第１図に示し、耐用日数で比較
した。レジンタブレットとしてエポキシ系樹脂を用い、
予熱したタブレットを加圧・流動させ予熱した金型に導
き（予熱温度は１５０度）硬化させ、成形した。According to the measurement results of the present invention and the comparative example, the present invention has an average particle size of the WC phase of 0.55 to 0.75 μm, and the comparative example shows 2.3 μm.
It was m. Furthermore, the performance of the single type transfer mold type was confirmed by the actual resin sealing work. The outline is shown in FIG. 1 and compared by the number of service days. Epoxy resin is used as a resin tablet,
The preheated tablet was pressurized and flowed, introduced into a preheated mold (preheating temperature was 150 degrees), cured, and molded.
その結果、硬さを同レベルに調整した合金を使用しても
比較例は２ケ月程度で軸方向の傷により寿命に達したの
に対し、本発明合金４は１０ケ月程度耐用した。この試
験においては、粒度の影響が顕著に現れ、比較例は使用
初期〜中期に腐食〜軸方向の傷により寿命に達したのに
対し、本発明例は、初期の腐食による傷が防止されたた
め正常摩耗により長寿命化が達成されている。As a result, even if an alloy having a hardness adjusted to the same level was used, the comparative example reached the end of its life in about 2 months due to axial scratches, while the alloy 4 of the present invention withstood for about 10 months. In this test, the effect of the particle size was significantly exhibited, and the comparative example reached the end of its life due to corrosion-axial scratches in the early to middle stages of use, whereas the present invention example prevented scratches due to initial corrosion. Long life is achieved by normal wear.
また、樹脂の種類、充填材の種類により変化する予熱温
度による加工性と、耐食性に関し、ＣｏＣｒ量を調整し
て、最適な成分を選択することが可能である。Further, regarding the workability due to the preheating temperature which changes depending on the type of resin and the type of filler, and the corrosion resistance, it is possible to adjust the amount of CoCr and select the optimum component.
ＷＣ基超硬合金において、結合相をＣｏ−Ｃｒ合金と
し、焼結体に於けるＷＣ相の平均粒度を０．８ミクロン
以下と微細化を計ることにより結合相のｍｅａｎ ｆｒ
ｅｅ ｐａｔｈを薄くし、耐腐食性、耐摩耗性に優れた
トランスファー成形用ポット・プランジャー用超硬合金
を開発した。In the WC-based cemented carbide, the binder phase is a Co-Cr alloy, and the average grain size of the WC phase in the sintered body is 0.8 μm or less.
We have developed a cemented carbide for transfer molding pots and plungers that has a thin ee path and excellent corrosion resistance and wear resistance.
第１図は本発明に係るトランスファーモールドの実施例
を示す断面図、第２図はポットの断面図で、使用初期の
状態を示す。第３図もポットの断面図で、使用長期の状
態を示す。 FIG. 1 is a cross-sectional view showing an embodiment of the transfer mold according to the present invention, and FIG. 2 is a cross-sectional view of a pot, showing the initial state of use. FIG. 3 is also a sectional view of the pot, showing a long-term use state.
Claims (1)
らなるＷＣ基超硬合金において、その焼結体の平均粒度
が０．８ミクロン以下より成ることを特長とするトラン
スファー成形用ポット・プランジャー。1. A WC-based cemented carbide composed of a Co--Cr alloy having a binder phase of 8 to 20%, wherein the average grain size of the sintered body is 0.8 μm or less for transfer molding. Pot plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15997989A JPH0624738B2 (en) | 1989-06-22 | 1989-06-22 | Transfer molding pot / plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15997989A JPH0624738B2 (en) | 1989-06-22 | 1989-06-22 | Transfer molding pot / plunger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0324922A JPH0324922A (en) | 1991-02-01 |
| JPH0624738B2 true JPH0624738B2 (en) | 1994-04-06 |
Family
ID=15705352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15997989A Expired - Fee Related JPH0624738B2 (en) | 1989-06-22 | 1989-06-22 | Transfer molding pot / plunger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624738B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603075A (en) * | 1995-03-03 | 1997-02-11 | Kennametal Inc. | Corrosion resistant cermet wear parts |
| EP1167107A3 (en) | 2000-06-26 | 2003-07-30 | Toyoda Gosei Co., Ltd. | Filler cap device |
| KR100507643B1 (en) * | 2002-11-21 | 2005-08-10 | 현대자동차주식회사 | Cable connection structure of automobile fuel cap |
| KR20080042506A (en) * | 2006-11-10 | 2008-05-15 | 현대자동차주식회사 | Tether unit for fuel filler cap |
| DE102019110950A1 (en) | 2019-04-29 | 2020-10-29 | Kennametal Inc. | Hard metal compositions and their applications |
| US20230407100A1 (en) * | 2022-06-17 | 2023-12-21 | Adam J. Smith | Wear Resistant Coatings |
-
1989
- 1989-06-22 JP JP15997989A patent/JPH0624738B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0324922A (en) | 1991-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5778301A (en) | Cemented carbide | |
| EP0516164A1 (en) | Watch exterior parts and manufacturing method thereof | |
| JPH0624738B2 (en) | Transfer molding pot / plunger | |
| JP3916465B2 (en) | Molten metal member made of sintered alloy having excellent corrosion resistance and wear resistance against molten metal, method for producing the same, and machine structure member using the same | |
| US20070081916A1 (en) | Production of the metallic parts with the alloyed layer containing dispersed compound particles, and the wear-proof parts | |
| US5336527A (en) | Method of covering substrate surface with sintered layer and powdery raw material used for the method | |
| JPH0625386B2 (en) | Method for producing aluminum alloy powder and sintered body thereof | |
| JP3113144B2 (en) | Method for producing high density sintered titanium alloy | |
| JP3061652B2 (en) | Plunger for transfer mold equipment | |
| JPH08216160A (en) | Mold for molding resin | |
| JP4121694B2 (en) | Sintered body Ni-based cermet and parts for plastic molding machine and die casting machine using the same | |
| JP2932538B2 (en) | Manufacturing method of alloy material for molding bullets | |
| JP4976626B2 (en) | Sintered alloy material, method for producing the same, and mechanical structural member using the same | |
| JP4964457B2 (en) | Method for producing Co-based sputtering target material containing oxide | |
| JPS62273820A (en) | Composite cylinder for plastic molding apparatus | |
| JP2004176136A (en) | Method of producing corrosion resistant and wear resistant material | |
| JP2813159B2 (en) | Manufacturing method of aluminum sintered material | |
| JP3327424B2 (en) | Hard alloy mold for resin and powder molding | |
| JP3020663B2 (en) | Seal | |
| JP5105460B2 (en) | Method of manufacturing wear-resistant member and plastic mold using the wear-resistant member | |
| JPH02299740A (en) | Forming mold for high-temperature molten metal | |
| JP2003166027A (en) | Ni-BASE ANTI-CORROSION ABRASION RESISTANT ALLOY, COMPOSITE MEMBER AND MEMBER FOR DIE CAST MACHINE USING THE ALLOY, AND BASE POWDER FOR THE ALLOY | |
| JPS6036642A (en) | Cermet for die member for die casting | |
| EP0518840A1 (en) | Method of making sintered carbonitride alloys | |
| JP2970078B2 (en) | Tool materials for surface treatment and surface treatment tools |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |