JPH0669698B2 - Simultaneous molding transfer method - Google Patents
Simultaneous molding transfer methodInfo
- Publication number
- JPH0669698B2 JPH0669698B2 JP1186829A JP18682989A JPH0669698B2 JP H0669698 B2 JPH0669698 B2 JP H0669698B2 JP 1186829 A JP1186829 A JP 1186829A JP 18682989 A JP18682989 A JP 18682989A JP H0669698 B2 JPH0669698 B2 JP H0669698B2
- Authority
- JP
- Japan
- Prior art keywords
- transfer sheet
- mold
- transfer
- molding
- molded product
- 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 - Lifetime
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
この発明は、成型品の表面に形成される図柄にクラック
やシワなどが生じなく、転写シートの伸びによる変化の
少ない転写を行うことのできる成形同時転写方法に関す
るものである。The present invention relates to a simultaneous molding transfer method capable of performing transfer without causing cracks or wrinkles on a pattern formed on the surface of a molded product and causing little change due to elongation of a transfer sheet.
固定型と可動型との間に転写シートを送り込み、樹脂の
射出成形と同時に転写シート上の図柄を成型品に転写す
る成形同時転写方法がある。 この方法において、転写シートは溶融樹脂が射出された
ときに樹脂の熱と圧力とによって金型のキャビティに沿
うように変形される。しかし、転写シートを固定型面と
可動型面とで挟むだけであると、転写シートの幅方向に
にシワが生じたりして美しい転写を行うことができな
い。 そこで、転写シートの全周を可動型面にクランプし、次
いで加熱軟化させて真空および／または圧空によりキャ
ビティに沿うように予備成形した後、金型を閉じて溶融
樹脂を固定型側より射出し、成型品表面に転写シートの
図柄を転写する方法がある。There is a simultaneous molding transfer method in which a transfer sheet is fed between a fixed mold and a movable mold, and the design on the transfer sheet is transferred to a molded product at the same time as resin injection molding. In this method, the transfer sheet is deformed along the cavity of the mold by the heat and pressure of the resin when the molten resin is injected. However, if the transfer sheet is only sandwiched between the fixed mold surface and the movable mold surface, wrinkles occur in the width direction of the transfer sheet, and beautiful transfer cannot be performed. Therefore, the entire circumference of the transfer sheet is clamped on the movable mold surface, then softened by heating and pre-formed along the cavity by vacuum and / or compressed air, then the mold is closed and the molten resin is injected from the fixed mold side. , There is a method of transferring the design of the transfer sheet to the surface of the molded product.
しかし、転写シートはその全周がクランプされて張力が
加わる状態となるので、金型のパーティングラインが鋭
角的であったり段差が大きいと、転写シートをクランプ
したとき、また真空／圧空によってキャビティに沿うよ
うに転写シートを予備成形したとき、あるいは金型が閉
じたときに、転写シートの転写層にクラックが生じた
り、転写シートにシワが生じたり破れたりすることがあ
った。 また、クランプ装置や加熱装置および真空／圧空装置の
設備が必要になり、金型構造が複雑になってコストが高
くつくものであった。特に、エアコンの前面パネル、冷
蔵庫のドア、各種OA機器のハウジング、自動車の内外装
部品など、三次曲面を有する比較的面積の大きい部品を
成形しようとする場合は、金型構造がいっそう複雑にな
った。 さらに、平面状の転写シートを伸張させてキャビティに
沿わせるため、図柄パターンのズレや歪みなどの変形が
大きく起こり、図柄パターンの大きさ、位置を補正する
ことが困難であった。 そして、絵柄を必要とする箇所が成型品上の一部であっ
ても、キャビティ全面を転写シートで覆う必要があるた
め、必要とする転写シートの面積が大きくなりコストが
高くなるものであった。 以上述べたような問題点は、立ち上がりの大きい形状の
成型品、あるいはパーティングラインが複雑に変化した
成型品を得ようとする場合、特に顕著なものであった。 したがって、この発明は上記のような欠点を解消し、形
成された図柄にクラックやシワなどが生じなく、転写シ
ートの伸びによる変化の少ない転写を可能にする成形同
時転写方法を提供することを目的とする。However, since the transfer sheet is clamped around its entire circumference and tension is applied, if the parting line of the mold is sharp or has a large step, when the transfer sheet is clamped, or when the vacuum / compressed air causes the cavity to move, When the transfer sheet was preformed so as to conform to the above, or when the mold was closed, the transfer layer of the transfer sheet was sometimes cracked, or the transfer sheet was wrinkled or torn. Further, equipments such as a clamp device, a heating device, and a vacuum / pneumatic device are required, and the die structure becomes complicated and the cost is high. Especially, when molding parts with a relatively large area having a cubic curved surface, such as front panels of air conditioners, doors of refrigerators, housings of various OA equipment, and interior / exterior parts of automobiles, the mold structure becomes more complicated. It was Furthermore, since the flat transfer sheet is stretched and stretched along the cavity, the pattern pattern is largely deformed or deformed, and it is difficult to correct the size and position of the pattern pattern. Even if the portion requiring the design is a part of the molded product, it is necessary to cover the entire surface of the cavity with the transfer sheet, so that the area of the required transfer sheet becomes large and the cost becomes high. . The above-mentioned problems were particularly remarkable when trying to obtain a molded product having a large rising shape or a molded product having a complicated parting line. Therefore, an object of the present invention is to solve the above-mentioned drawbacks and to provide a molding simultaneous transfer method capable of transferring with little change due to elongation of a transfer sheet without causing cracks or wrinkles in a formed pattern. And
この発明は、以上の目的を達成するために、次のように
構成した。すなわちこの発明の成形同時転写方法は、固
定型と可動型との間に長尺の転写シートを所定の長さ送
り込み、射出成形と同時に転写シート上の図柄を成型品
に転写する成形同時転写方法において、転写シートの送
り方向に対して側方の少なくとも一辺が、型閉め後にキ
ャビティ内で自由端となるように、転写シートを送り込
むように構成した。 図面を参照しながらこの発明をさらに詳しく説明する。 第１〜２図はこの発明の成形同時転写方法の一実施例を
示す正面図である。１は可動型、２はキャビティ、３は
クランプ、４は転写シート、５はゲートをそれぞれ示
す。 長尺の転写シート４を、転写シート４の送り方向に対し
て側方の一辺あるいは両辺がキャビティ２内で自由端と
なるように金型内に送り込む（第１〜第２図参照）。転
写シート４の自由端とは、転写シート４の周囲のうち、
固定型面にも可動型面にも押さえ付けられておらずに、
可動型１のキャビティ内で開放された状態にある部分の
ことである。転写シート４はプラスチックフィルムなど
の基体シート上に図柄層や接着層などの転写層が形成さ
れたものである。 次いで、金型を閉じて固定型に設けたゲート５より溶融
樹脂をキャビティ２内に射出し、成型品を形成するのと
同時に成型品表面に転写シート４の転写層を接着する。 成型品の冷却の後、金型を開いて成型品を取り出し、転
写シート４の基体シートを剥離して図柄が形成された成
型品が得られる。なお、転写シートとして基体シートを
剥離しない成型品に貼り付けられたままとなるものを採
用してもよい。 また、転写シート４の通過面以外の位置にもゲートを設
ける場合には、転写シート４通過面に位置するゲート５
から射出される樹脂６が転写シート４全面を覆った後
に、他のゲート７から射出された樹脂８と合流するよう
に、ゲート位置、成型品の厚さ、各ゲートの射出開始時
期などを調整するとよい（第３〜第４図参照）。もし、
転写シート４通過面に位置するゲート５から射出された
樹脂６が転写シート４面を覆わぬうちに他のゲート７か
ら射出された樹脂８と転写シート４面で合流すると、転
写シート４の自由端は成型樹脂８内に巻き込まれる。 また、転写シート４の基体シート10を成型品９から剥す
と、基体シート10の厚みの分だけ段差が転写シート４の
自由端部分に形成される（第５図参照）。その大きさ
は、通常は基体シート10の厚みである0.02〜0.05mmとな
る。この段差は目立つものであるので、わかりにくくす
るために、次のような凹凸を成型品９に形成するとよ
い。すなわち、段差ｄが0.1mm以上、望ましくは0.3〜3.
0mmの範囲、幅１が0.3mm以上、望ましくは0.3〜3.0mmの
範囲である凹部または凸部（第６〜９図参照）、あるい
は凹凸繰り返し部（第10図参照）が成型品９上に形成さ
れるようにキャビティ２に凹凸を形成するとよい。ある
いは、成型品外周部の立ち上がり部に転写シートの自由
端を回り込むようにすることにより（第11図参照）、段
差を視覚的に判別しにくくすることもできる。 また、転写シートと金型との見当合わせを行うのに必要
な転写シートの位置検出マーク12は図柄間の内側に配置
し、図柄パターンと基体シートの自由端との間隔ｍは3.
0mm以下、望ましくは1.0mm以下になるようにすればよい
（第12〜13図参照）。The present invention is configured as follows to achieve the above object. That is, the simultaneous molding transfer method of the present invention is a simultaneous transfer molding method in which a long transfer sheet is fed between a fixed mold and a movable mold by a predetermined length, and the pattern on the transfer sheet is transferred to a molded product simultaneously with injection molding. In the above, the transfer sheet is fed so that at least one side lateral to the feed direction of the transfer sheet becomes a free end in the cavity after the mold is closed. The present invention will be described in more detail with reference to the drawings. 1 and 2 are front views showing an embodiment of the molding simultaneous transfer method of the present invention. 1 is a movable type, 2 is a cavity, 3 is a clamp, 4 is a transfer sheet, and 5 is a gate. The long transfer sheet 4 is fed into the mold so that one side or both sides lateral to the feeding direction of the transfer sheet 4 are free ends in the cavity 2 (see FIGS. 1 and 2). The free end of the transfer sheet 4 is defined as
Not fixed on the fixed mold surface or the movable mold surface,
The movable mold 1 is a part that is in an open state in the cavity. The transfer sheet 4 is formed by forming a transfer layer such as a design layer or an adhesive layer on a base sheet such as a plastic film. Next, the mold is closed and molten resin is injected into the cavity 2 from the gate 5 provided in the fixed mold to form a molded product, and at the same time, the transfer layer of the transfer sheet 4 is bonded to the surface of the molded product. After cooling the molded product, the mold is opened, the molded product is taken out, and the base sheet of the transfer sheet 4 is peeled off to obtain a molded product having a design. It should be noted that as the transfer sheet, a sheet that remains attached to a molded product that does not peel off the base sheet may be adopted. When the gate is provided at a position other than the passage surface of the transfer sheet 4, the gate 5 located on the passage surface of the transfer sheet 4 is also used.
The gate position, the thickness of the molded product, the injection start timing of each gate, etc. are adjusted so that the resin 6 injected from the resin covers the entire surface of the transfer sheet 4 and then merges with the resin 8 injected from another gate 7. This should be done (see FIGS. 3 to 4). if,
When the resin 6 injected from the gate 5 located on the transfer sheet 4 passage surface merges with the resin 8 injected from another gate 7 on the transfer sheet 4 surface before the transfer sheet 4 surface is covered, the transfer sheet 4 is freed. The ends are rolled into the molding resin 8. Further, when the base sheet 10 of the transfer sheet 4 is peeled off from the molded product 9, a step is formed in the free end portion of the transfer sheet 4 by the thickness of the base sheet 10 (see FIG. 5). The size is usually 0.02 to 0.05 mm, which is the thickness of the base sheet 10. Since this step is conspicuous, it is preferable to form the following unevenness on the molded product 9 in order to make it difficult to understand. That is, the step d is 0.1 mm or more, preferably 0.3 to 3.
A concave or convex portion (see FIGS. 6 to 9) or a concave-convex repeating portion (see FIG. 10) having a range of 0 mm and a width 1 of 0.3 mm or more, preferably 0.3 to 3.0 mm is formed on the molded product 9. Concavities and convexities may be formed in the cavity 2 so as to be formed. Alternatively, by making the free end of the transfer sheet go around the rising portion of the outer peripheral portion of the molded product (see FIG. 11), it is possible to make it difficult to visually distinguish the step. Further, the position detection mark 12 of the transfer sheet necessary for registering the transfer sheet and the mold is arranged inside the pattern, and the distance m between the pattern pattern and the free end of the base sheet is 3.
It should be 0 mm or less, preferably 1.0 mm or less (see FIGS. 12 to 13).
この発明は、金型を閉じても、転写シートの送り方向に
対して側方の少なくとも一辺が、キャビティ内で開放さ
れた状態にあるので（第14図参照）、転写シートの自由
端側はゲートから射出される溶融樹脂の流動にしたがっ
てキャビティに無理なく沿うことができる（第15図参
照）。したがって、自由端側の転写層にクラックやフィ
ルムにシワが発生せず、美麗な成型品が形成される。According to the present invention, even if the mold is closed, at least one side of the transfer sheet in the feeding direction is open in the cavity (see FIG. 14), so that the free end side of the transfer sheet is It can easily follow the cavity according to the flow of molten resin injected from the gate (see Fig. 15). Therefore, a beautiful molded product is formed without cracks or wrinkles in the film on the transfer layer on the free end side.
実施例１ 大きさが650×400mm、厚さ3.0mmであるファンヒーター
の前面パネルのほぼ中央に、幅150mm・長さ400mmの帯状
の図柄を形成させるように成形同時転写を行った（第16
図参照）。 転写シートの自由端が位置する可動型のキャビティ内
に、段差0.7mm・幅1.4mmの断面が半円状である溝部を設
けた。 固定型には転写シートが通過する部分に２箇所、その他
の部分に４箇所のピンポイントゲートを設けた。転写シ
ートが通過する部分のゲートから射出されている樹脂
が、他のゲートから射出される樹脂より速く転写シート
を覆うように、ゲートの径や成型品の肉厚などを調整し
た。 転写シートの幅を152mmとして、箔送り装置に取り付け
て金型内に送り込んで位置決めした。転写シートの送り
方向に対して側方の両辺は自由端となった。 次に、型締め力850tの直圧式射出成形機で成形を行っ
た。 射出条件（射出材料:ABS樹脂） 金型表面温度 50℃ シリンダー温度 240℃ 射出圧力 1100kg/cm2 射出時間 4.5秒 保圧力 850kg/cm2 保圧時間 3.0秒 このようにして得られた成型品は、図柄にクラックやシ
ワもなく、また図柄のズレや歪みなどの変形の少ない意
匠効果に優れたものであった。 実施例２ 大きさが700×150mm、厚さ4.0mmであり断面形状がコの
字型で、金型にアンダーカット処理を必要とするフック
が16箇所形成され、裏面に立ち上がり部も含めて図柄が
形成されるように自動車外装部品の成形同時転写を行っ
た（第17図参照）。 図柄を必要とする部分は立ち上がり部も含めると180mm
であるため図柄幅を182mmとした。この転写シートを箔
送り装置に取り付けて金型内に送り込み、見当を合わせ
て位置決めした。ゲートはサイドゲート方式とし、固定
型側の転写シートの幅の中央に位置する部分に１箇所設
けた。 次に、型締め力400tのトグル式射出成形機を使用して成
形を行った。 射出条件（射出材料：透明アクリル樹脂） 金型表面温度 55℃ シリンダー温度 260℃ 射出圧力 1350kg/cm2 射出時間 5.5秒 保圧力 880kg/cm2 保圧時間 4.0秒 このようにして得られた成型品は、図柄にクラックやシ
ワもなく、また図柄のズレや歪みなどの変形の少ない意
匠効果に優れたものであった。 なお、実施例２は成型品の裏面に転写を行うので成型品
の表側に基体シートによる段差は生じなかった。Example 1 Simultaneous molding transfer was carried out so as to form a strip-shaped pattern having a width of 150 mm and a length of 400 mm at approximately the center of the front panel of a fan heater having a size of 650 × 400 mm and a thickness of 3.0 mm (16th).
See figure). A groove having a semicircular cross section with a step of 0.7 mm and a width of 1.4 mm was provided in the movable mold cavity in which the free end of the transfer sheet was located. The fixed mold was provided with two pinpoint gates in a portion through which the transfer sheet passes and four pinpoint gates in other portions. The diameter of the gate and the thickness of the molded product were adjusted so that the resin injected from the gate in the portion where the transfer sheet passes covered the transfer sheet faster than the resin injected from other gates. The width of the transfer sheet was set to 152 mm, and the transfer sheet was attached to the foil feeding device and fed into the mold for positioning. Both sides of the transfer sheet in the feeding direction were free ends. Next, molding was performed using a direct pressure injection molding machine with a mold clamping force of 850 tons. Injection conditions (injection material: ABS resin) Mold surface temperature 50 ℃ Cylinder temperature 240 ℃ Injection pressure 1100kg / cm 2 Injection time 4.5 seconds Holding pressure 850kg / cm 2 Holding time 3.0 seconds Molded product obtained in this way The design was free from cracks and wrinkles, and there was little deformation such as displacement or distortion of the design, and the design effect was excellent. Example 2 The size is 700 × 150 mm, the thickness is 4.0 mm, the cross-sectional shape is U-shaped, and 16 hooks that require undercut processing are formed in the mold, and the pattern including the rising part on the back surface Simultaneous molding and transfer of the exterior parts of the automobile was performed so as to form (see Fig. 17). The part that needs a design is 180 mm including the rising part
Therefore, the pattern width was set to 182 mm. This transfer sheet was attached to a foil feeding device, fed into a mold, and registered and positioned. The gate was of the side gate type, and was provided at one location in the central portion of the width of the transfer sheet on the fixed mold side. Next, molding was performed using a toggle type injection molding machine with a mold clamping force of 400t. Injection conditions (injection material: transparent acrylic resin) Mold surface temperature 55 ℃ Cylinder temperature 260 ℃ Injection pressure 1350kg / cm 2 Injection time 5.5 seconds Holding pressure 880kg / cm 2 Holding time 4.0 seconds Molded product obtained in this way Had an excellent design effect with no cracks or wrinkles in the design and little deformation such as displacement or distortion of the design. In Example 2, since the transfer was performed on the back surface of the molded product, the step due to the base sheet did not occur on the front side of the molded product.
この発明の成形同時転写方法は、固定型と可動型との間
に長尺の転写シートを所定の長さ送り込み、射出成形と
同時に転写シート上の図柄を成型品に転写する成形同時
転写方法において、転写シートの送り方向に対して側方
の少なくとも一辺が、型閉め後にキャビティ内で自由端
となるように、転写シートを送り込むので、転写シート
の幅方向にクラックやシワなどが発生しない。 また、立ち上がりの大きい形状の成型品やパーティング
ラインが鋭角的あるいは段差の大きい状態で変化する成
型品を得るために、製品形状を大幅に変更することな
く、また設備費用や金型コストも安価に押さえることが
できる。 また、大きな面積の一部に図柄を形成するので、転写シ
ートの幅を図柄を必要とする寸法に限定することがで
き、転写シートのコストを低くすることができる。 さらに、転写シートの幅方向に必要以上に伸張させてキ
ャビティに沿わせることがないので、転写シートの幅方
向の図柄パターンのズレや歪みなどの変形が小さく、図
柄パターンの大きさ、位置を補正することが容易であ
る。The molding simultaneous transfer method of the present invention is a simultaneous molding transfer method in which a long transfer sheet is fed between a fixed mold and a movable mold by a predetermined length, and the design on the transfer sheet is transferred to a molded product simultaneously with injection molding. Since the transfer sheet is fed so that at least one side lateral to the feed direction of the transfer sheet becomes a free end in the cavity after the mold is closed, cracks and wrinkles do not occur in the width direction of the transfer sheet. Also, in order to obtain a molded product with a large rising shape and a parting line that changes sharply or with a large step, the product shape is not significantly changed, and the equipment cost and mold cost are also low. Can be held down. Further, since the design is formed on a part of a large area, the width of the transfer sheet can be limited to a dimension requiring the design, and the cost of the transfer sheet can be reduced. Furthermore, since it does not extend more than necessary in the width direction of the transfer sheet so that it does not fit along the cavity, deformation such as deviation or distortion of the pattern pattern in the width direction of the transfer sheet is small, and the size and position of the pattern pattern are corrected. Easy to do.
第１〜４図はこの発明の成形同時転写方法の一実施例を
示す正面図である。第５図は従来の成型品の一実施例を
示す断面図である。第６〜11図はこの発明によって得ら
れる成型品の一実施例を示す断面図である。第12〜13図
はこの発明に使用する転写シートの平面図である。第14
〜15図はこの発明の成形同時転写方法の成形工程を示す
断面図である。第16〜17図はこの発明の成形同時転写方
法の一実施例を示す斜視図である。 １……可動型、２……キャビティ、３……クランプ、４
……転写シート、５・７……ゲート、６・８……樹脂、
９……成型品、10……基体シート、11……転写層、12…
…位置検出マーク、13……固定型。1 to 4 are front views showing an embodiment of the molding simultaneous transfer method of the present invention. FIG. 5 is a sectional view showing an example of a conventional molded product. 6 to 11 are sectional views showing an embodiment of a molded product obtained by the present invention. 12 to 13 are plan views of the transfer sheet used in the present invention. 14th
15 to 15 are sectional views showing molding steps of the molding simultaneous transfer method of the present invention. 16 to 17 are perspective views showing an embodiment of the molding simultaneous transfer method of the present invention. 1 ... Movable type, 2 ... Cavity, 3 ... Clamp, 4
...... Transfer sheet, 5.7 …… Gate, 6.8 …… Resin,
9 ... Molded product, 10 ... Base sheet, 11 ... Transfer layer, 12 ...
… Position detection mark, 13… Fixed type.
Claims (3)
を所定の長さ送り込み、射出成形と同時に転写シート上
の図柄を成型品に転写する成形同時転写方法において、
転写シートの送り方向に対して側方の少なくとも一辺
が、型閉め後にキャビティ内で自由端となるように、転
写シートを送り込むことを特徴とする成形同時転写方
法。1. A molding simultaneous transfer method in which a long transfer sheet is fed between a fixed mold and a movable mold by a predetermined length, and the pattern on the transfer sheet is transferred to a molded product simultaneously with injection molding,
A simultaneous molding and transfer method characterized in that the transfer sheet is fed so that at least one side lateral to the feed direction of the transfer sheet becomes a free end in the cavity after the mold is closed.
転写シート通過面に位置する部分に設けられ、そのゲー
トより射出される溶融樹脂が他のゲートから射出された
樹脂と転写シート面上で合流しないように射出成形する
請求項１記載の成形同時転写方法。2. At least one of the gates of the mold is provided in a portion located on the fixed transfer sheet passage surface, and the molten resin injected from the gate is on the transfer sheet surface with the resin injected from the other gates. The simultaneous molding transfer method according to claim 1, wherein the injection molding is performed so that they do not merge.
る部分に、段差0.1mm以上、幅0.3mm以上の凹部または凸
部が形成されている請求項１記載の成形同時転写方法。3. The molding simultaneous transfer method according to claim 1, wherein a concave portion or a convex portion having a step of 0.1 mm or more and a width of 0.3 mm or more is formed in a portion of the cavity located at the free end of the transfer sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1186829A JPH0669698B2 (en) | 1989-07-19 | 1989-07-19 | Simultaneous molding transfer method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1186829A JPH0669698B2 (en) | 1989-07-19 | 1989-07-19 | Simultaneous molding transfer method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351112A JPH0351112A (en) | 1991-03-05 |
| JPH0669698B2 true JPH0669698B2 (en) | 1994-09-07 |
Family
ID=16195343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1186829A Expired - Lifetime JPH0669698B2 (en) | 1989-07-19 | 1989-07-19 | Simultaneous molding transfer method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0669698B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60212314A (en) * | 1984-04-09 | 1985-10-24 | Dainippon Printing Co Ltd | Injection mold assembly with decorated sheet |
| JPS63109054A (en) * | 1986-10-27 | 1988-05-13 | Taihei Kogyo Kk | Transfer film supplying method for simultaneous forming and transferring device |
| JPS63246217A (en) * | 1987-03-31 | 1988-10-13 | Meiki Co Ltd | Injection mold for printed circuit board |
-
1989
- 1989-07-19 JP JP1186829A patent/JPH0669698B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351112A (en) | 1991-03-05 |
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