JPH0324922A - Pot plunger for transfer molding - Google Patents
Pot plunger for transfer moldingInfo
- Publication number
- JPH0324922A JPH0324922A JP15997989A JP15997989A JPH0324922A JP H0324922 A JPH0324922 A JP H0324922A JP 15997989 A JP15997989 A JP 15997989A JP 15997989 A JP15997989 A JP 15997989A JP H0324922 A JPH0324922 A JP H0324922A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- particle size
- corrosion
- less
- phase
- 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.)
- Granted
Links
- 238000001721 transfer moulding Methods 0.000 title claims abstract description 6
- 229910000599 Cr alloy Inorganic materials 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 239000002245 particle Substances 0.000 abstract description 16
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 13
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 239000000956 alloy Substances 0.000 abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229910000684 Cobalt-chrome Inorganic materials 0.000 description 1
- 239000010952 cobalt-chrome Substances 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
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、トランスファー或型用ポッ
ト・プランジャーの超硬合金工具に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cemented carbide tool for a pot plunger for a transfer mold, which has excellent wear resistance.
一般に，電子部品の封正方法として、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
送して硬化或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、封子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 for sealing electronic components, upper and lower molds engraved with the shape of the product are closed, and a sealing material made of compacted powder (
In recent years, transfer molding has been carried out, in which a thermosetting resin (thermosetting resin) is placed in a pot built into a mold, heated, plasticized, pushed out with a plunger, and transferred to harden or shape.In recent years, electronic devices have become highly integrated. Along with this, wiring patterns and element chips have become larger and stronger sealing resins have been required.As a result, the wear of pots and plungers has increased, and cemented carbide products, especially JIS V3
~v5 equivalent products are increasing.
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, regarding cemented carbide, especially ultrafine grained cemented carbide, WC
An alloy is used in which the particles are made finer, a small amount of TaC, Cr, V, etc. is added as a grain suppressor, and bonded with Co.The alloy is characterized by its toughness, and has both excellent wear resistance and toughness, and is widely used. It is put into practical use.
〔発明が解決しようとする問題点）
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。[Problems to be solved by the invention] However, when cemented carbide is used, the gas generated when the resin is processed corrodes the cemented carbide, and if it continues to be used, the resin will adhere to the corroded parts. In particular, the silica particles contained in the resin dig in, causing scratches in the axial direction on the outer periphery of the plunger, into which molten resin, silica particles, etc. infiltrate and accumulate, further interfering with 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、そこにプランジャ一と同様、樹脂
が付着し、作動しなくなる問題点があった．
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。A similar phenomenon also occurred on the inner wall of the pot, where corrosion caused spots and scratches, and like the plunger, resin adhered to these spots, causing the problem that the pot would no longer work. An object of the present invention is to use a cemented carbide with improved corrosivity and increase hardness to prevent corrosion that occurs in the early stages of use, thereby extending the life of the plunger.
本発明は上記観点に基ずいて威されたものであり、トラ
ンスファー或型用ポット・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 developed based on the above viewpoint, and a pot plunger for a transfer mold is made of a WC-based cemented carbide made of a Co-Cr alloy with a binder phase of 8 to 20%. The hard alloy is characterized in that its sintered body has an average grain size of 0.8 microns or less.
粒度を細かくすることは、結合相のｍｅａｎｆｒｅｅ
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＜シ，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
。Refining the particle size means free
In addition to making the path thinner and improving corrosion resistance, it significantly reduces spot-like scratches that occur initially due to corrosion, and also reduces axial scratches that occur later, thereby extending life.
Ｃ ｏ − Ｃ ｒ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 increases the corrosion resistance of the binder phase against corrosion caused by gas generated during the preheating stage of the resin.
Significantly reduces 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Ｃ ｏ − Ｃ ｒ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) Content of Co-Cr alloy in binder phase is 8%
If it is less than 8% to 20%, the amount of bonding metal will not be sufficient and sufficient toughness will not be provided, and if it exceeds 20%, the WC content will be relatively reduced and the wear resistance will be significantly impaired. did. Further, the amount of Cr added may be less than the amount that forms a solid solution in Co, and an amount that causes Cr to form a single phase is not preferable because it impairs toughness.
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 in the sintered body is determined by particle size measurement using an image analyzer. If the average particle size is 0.8 microns or less, the mean free path of the bonding metal is determined.
is sufficiently thin so that pools of bonded metals are less likely to form.
This is because the spot-like corrosion mentioned in the problem section and the axial scratches caused by silica particles are less likely to occur.
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。Furthermore, in the cemented carbide, V,
Although the addition of TaC, etc. is effective and has the effect of making the average particle size finer, it is unrelated to improving corrosion resistance, and Cr
It is effective when added in combination with.
以下本発明を実施例に基づき詳細に説明する。The present invention will be described in detail below based on examples.
市販のＷＣ粉末（平均粒度０．６μｍ及び２．５μｍ）
、Ｃｒ粉末（同２．０μｍ），ＴａＣ粉末（同１．０μ
ｍ）及び．Ｇｏ粉末を使用し第１表に示す組或で作威し
た．また比較のため９０ＷＣ−９．１Ｇｏ−０．９Ｃｒ
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’ ＣＩ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)
, Cr powder (2.0μm), TaC powder (1.0μm)
m) and. The compositions shown in Table 1 were prepared using Go powder. Also, for comparison, 90WC-9.1Go-0.9Cr
An alloy corresponding to JISV4 was also manufactured using WC2.5 micron powder so as to have the following composition. These powders were mixed, dried, sintered for 1400' CI hours, and then processed into a predetermined shape.
また、物性，ミクロｍ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。In addition, in order to confirm changes in physical properties and microstructure, the chips were polished and lapped, 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ＷＩ．ｗｔ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．
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↓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ボキシ系樹脂を用い、
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、或形した。In addition, the particle size was determined by electron microscopy. We carried out a wt observation and measured using an image analyzer based on the photograph. The measurement results of the present invention and the comparative example show that the average particle size of the WC phase is 0.55 to 0.75 μm in the present invention, and 2.3 μm in the comparative example.
It was m. Furthermore, we confirmed its performance in actual resin sealing work using a single-type transfer mold. The outline is shown in Figure ↓, and the service life is compared. Using epoxy resin as a resin tablet,
The preheated tablet was pressed and fluidized, introduced into a preheated mold (preheating temperature was 150 degrees Celsius), and cured and shaped.
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’＋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威されている。As a result, even when using alloys whose hardness was adjusted to the same level, the comparative example reached the end of its life due to axial scratches in about 2 months, whereas the alloy 4 of the present invention lasted about 10'+ months. In this test, the influence of particle size was noticeable, and while the comparative example reached the end of its service life due to corrosion and axial scratches in the early to middle stages of use, the inventive example was able to prevent scratches due to initial corrosion. Longer life has been achieved through 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！）！
！整して、最適な成分を選択することが可能である。Also, regarding the processability and corrosion resistance due to the preheating temperature, which varies depending on the type of resin and filler. CoCr amount! )!
! It is possible to select the optimal component by adjusting the
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 WC-based cemented carbide, the mean fr of the binder phase can be reduced by using a Co-Cr alloy as the binder phase and refining the average particle size of the WC phase in the sintered body to 0.8 microns or less.
We have developed a cemented carbide for transfer molding pots and plungers with a thin ee path and excellent corrosion and wear resistance.
第ｌ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 sectional view showing an embodiment of the transfer mold according to the present invention, and FIG. 2 is a sectional view of the pot, showing the state at the initial stage of use. FIG. 3 is also a sectional view of the pot, showing its state after long-term use.
Claims (1)
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。A pot plunger for transfer molding, characterized in that the average grain size of the sintered body is 0.8 microns or less in a WC-based cemented carbide made of a Co-Cr alloy with a binder phase of 8 to 20%.
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 true JPH0324922A (en) | 1991-02-01 |
| JPH0624738B2 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) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11502260A (en) * | 1995-03-03 | 1999-02-23 | ケンナメタル インコーポレイテッド | Corrosion resistant cermet wear parts |
| US6543833B2 (en) | 2000-06-26 | 2003-04-08 | Toyoda Gosei Co., Ltd. | 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 |
| US11821062B2 (en) | 2019-04-29 | 2023-11-21 | Kennametal Inc. | Cemented carbide compositions and applications thereof |
| EP4293134A1 (en) * | 2022-06-17 | 2023-12-20 | Praxair S.T. Technology, Inc. | Improved wear resistant coatings |
-
1989
- 1989-06-22 JP JP15997989A patent/JPH0624738B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11502260A (en) * | 1995-03-03 | 1999-02-23 | ケンナメタル インコーポレイテッド | Corrosion resistant cermet wear parts |
| US6543833B2 (en) | 2000-06-26 | 2003-04-08 | Toyoda Gosei Co., Ltd. | 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 |
| US11821062B2 (en) | 2019-04-29 | 2023-11-21 | Kennametal Inc. | Cemented carbide compositions and applications thereof |
| EP4293134A1 (en) * | 2022-06-17 | 2023-12-20 | Praxair S.T. Technology, Inc. | Improved wear resistant coatings |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0624738B2 (en) | 1994-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |