JPH067967B2

JPH067967B2 - Mold device for shadow mask

Info

Publication number: JPH067967B2
Application number: JP59243747A
Authority: JP
Inventors: 敏西川; 修渡辺; 春夫梅原
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1984-11-19
Filing date: 1984-11-19
Publication date: 1994-02-02
Anticipated expiration: 2009-02-02
Also published as: JPS61123426A

Description

【発明の詳細な説明】産業上の利用分野本発明は、カラー受像管用シャドウマスクの金型装置に
関するものである。Description: TECHNICAL FIELD The present invention relates to a mold device for a shadow mask for a color picture tube.

従来例の構成とその問題点一般にカラーテレビジョンの受像管用のシャドウマスク
は、多数のアパーチャを備えた有孔領域とこの有孔領域
を取囲む無孔領域とからなり、通常０．１〜0.18mm厚の
軟鋼板を材料としている。Structure of Conventional Example and Problems Thereof In general, a shadow mask for a picture tube of a color television is composed of a perforated region having a large number of apertures and a non-perforated region surrounding the perforated region, and is usually 0.1 to 0.18. Made from mm thick mild steel plate.

このシャドウマスクの成形金型の構造及び、成形工程
は、第１図から第４図に示すように、連続して加工され
る。すなわち、成形ダイ１とブランクホルダー２で材料
５をはさみ込む（第１図参照）。下型パッド３とパンチ
４で成形を行なう（第２図参照）。成形完了（第３図参
照）、パンチ４が上昇し、パッド３も上昇し（第４図参
照）、すべて完了する。The structure of the molding die of this shadow mask and the molding process are continuously processed as shown in FIGS. 1 to 4. That is, the material 5 is sandwiched between the molding die 1 and the blank holder 2 (see FIG. 1). Molding is performed with the lower die pad 3 and the punch 4 (see FIG. 2). The molding is completed (see FIG. 3), the punch 4 is raised, the pad 3 is also raised (see FIG. 4), and all is completed.

ところが従来、加工完了後、パンチ４が上昇する時製品
５の微妙な変形、圧力バランス等で第５図に示すよう
に、パンチ４に付いたままになる。こういう状態が、仮
に百個に１回、千個に１回発生しても非常に作業性の悪
いものになる。However, conventionally, after the completion of processing, when the punch 4 rises, the product 5 remains attached to the punch 4 due to subtle deformation, pressure balance and the like, as shown in FIG. Even if such a state occurs once in 100 pieces and once in 1,000 pieces, the workability becomes extremely poor.

従来、こういういわゆるクライツキが発生した場合に
は、第６図に示すように、パンチ４の肩部６や成形クリ
アランス７をそれぞれ調整して、第７図に示すように、
なめらかな曲面を持つ肩８にしたり、大きなクリアラン
ス９にして、パンチ４への、クライツキを小さくする。
しかしながら、このような修正では、製品５の側面１０
の直角度が悪くなり、第８図に示すように相手製品であ
るフレーム１１と、シャドウマスク５のカン合スキマ１
２が大きく、充分な組立てができない。第９図は、正規
の組立て状態である。スキマ１３は非常に小さい。Conventionally, when such a so-called click has occurred, as shown in FIG. 6, the shoulder portion 6 of the punch 4 and the molding clearance 7 are adjusted, respectively, as shown in FIG.
The shoulder 8 having a smooth curved surface or the large clearance 9 is used to reduce the cling to the punch 4.
However, with such a modification, the side surface 10 of the product 5 is
Squareness of the shadow mask becomes worse, and as shown in FIG.
2 is large and cannot be assembled sufficiently. FIG. 9 shows a regular assembled state. Space 13 is very small.

発明の目的本発明は、従来のこういったクライツキを防止すると共
に、作業性の良い、又製品変形の無い金型を供給するも
のである。OBJECT OF THE INVENTION The present invention is to provide a metal mold which prevents the above-mentioned clits and has good workability and no product deformation.

発明の構成本発明は、中央部に有孔領域、前記有孔領域を取り囲む
無孔領域、前記有孔領域と前記無孔領域との間に溝部を
有するシャドウマスクを成形するためのシャドウマスク
用金型装置であって、昇降自在に配され、前記シャドウ
マスクの溝部を成形するための凸部を有するパッドと、
昇降自在に配され、前記シャドウマスクの溝部に対応す
る位置に凹部を有し、前記パッドとで成形前のシャドウ
マスク材料をはさみ込んで前記シャドウマスク全体を成
形する成形パンチと、前記成形パンチの周辺に昇降自在
に配されたブランクホルダーと、前記パッドの周辺に、
かつ前記ブランクホルダーと対向するように配され、前
記ブランクホルダーとで前記シャドウマスクの周縁部を
屈曲させる成形ダイとからなり、かつ前記成形パンチの
凹部に複数個のエアー供給用小穴が設けられ、シャドウ
マスクの成形完了と同時に前記複数個のエアー供給用小
穴よりエアーが供給されて、前記成形パンチから成形後
のシャドウマスクが離脱するよう構成されたことを特徴
とするものである。The present invention relates to a shadow mask for forming a shadow mask having a perforated region in a central portion, a non-perforated region surrounding the perforated region, and a groove portion between the perforated region and the non-perforated region. A mold device, which is arranged so as to be able to move up and down, and has a convex portion for molding the groove portion of the shadow mask,
A forming punch that is arranged to be movable up and down, has a concave portion at a position corresponding to the groove portion of the shadow mask, and inserts the shadow mask material before forming with the pad to form the entire shadow mask, and a forming punch of the forming punch. A blank holder placed around the pad and around the pad,
And arranged to face the blank holder, consisting of a molding die that bends the peripheral portion of the shadow mask with the blank holder, and a plurality of small holes for air supply are provided in the concave portion of the molding punch, Simultaneously with completion of molding of the shadow mask, air is supplied from the plurality of small holes for air supply, and the shadow mask after molding is separated from the molding punch.

実施例の説明本発明の一実施例を第１０図〜第１５図によって説明す
る。第１０図はシャドウマスクの斜視図で、第１１図
は、第１０図の１４部の断面拡大図である。通常シャド
ウマスクには、成形外形の内側に成形外形と近似形状で
ヒモ成形部１４が構成されている。このヒモ成形部１４
はシャドウマスク全体の強度を上げるとともに、金型で
の成形時に、有孔領域の穴変形防止を防ぐ目的である。
第１２図は本発明による成形パンチ４の断面図で、第１
３図はその平面図である。シャドウマスク製品５のヒモ
成形部１４を成形するミゾ部１５に複数個の小穴１６を
設けたもので、小穴１６は途中で大穴１７に連結してい
るが、これは加工を楽にするもので、小穴のみで通して
も作用は、同じである。この時小穴１６はミゾ部１５よ
り同じか、小さい事が特徴であり、その説明を第１４図
により行なう。第１４図は成形加工時のパンチ４ダイφ
パッド３及び製品５の断面図で、特にヒモ出し成形部を
示すものである。Description of Embodiments One embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a perspective view of the shadow mask, and FIG. 11 is an enlarged cross-sectional view of a portion 14 of FIG. In the normal shadow mask, the string forming portion 14 is formed inside the molded outer shape in a shape similar to the molded outer shape. This string forming part 14
Is for the purpose of increasing the strength of the shadow mask as a whole and preventing the deformation of holes in the perforated area during molding with a die.
FIG. 12 is a sectional view of the forming punch 4 according to the present invention.
FIG. 3 is a plan view thereof. A plurality of small holes 16 are provided in the groove portion 15 for forming the string forming portion 14 of the shadow mask product 5, and the small holes 16 are connected to the large hole 17 on the way, but this is for ease of processing, The effect is the same even if it is passed through only a small hole. At this time, the small hole 16 is characterized in that it is the same as or smaller than the groove portion 15, which will be described with reference to FIG. Fig. 14 shows punch 4 die φ during molding
FIG. 3 is a cross-sectional view of the pad 3 and the product 5, and particularly shows a string forming portion.

ヒモ出し成形のミゾ１５は通常製品の成形高さ１７よ
り、若干高くして、製品にキズを付けないようにしてい
る。１８は成形ミゾの高さである。実際の加工はミゾの
肩部１９で成形するので、底面を当てる必要はないので
ある。このミゾの中に小穴を設ける事により、小穴１６
の接触キズが直接製品面に残る事はない。The groove 15 for forming the string is slightly higher than the molding height 17 of the normal product so that the product is not scratched. 18 is the height of the molding groove. Since the actual processing is performed by forming the shoulder portion 19 of the groove, it is not necessary to apply the bottom surface. By forming a small hole in this groove, small hole 16
No contact scratches will remain directly on the product surface.

本構成により、成形完了時に小穴よりエアーを成形品に
吹きつけ、パンチ４から成形品をくらいつかせる事はな
く、分離するのである。With this configuration, air is blown to the molded product from the small holes at the time of completion of molding, and the molded product is separated from the punch 4 without being excessively pressed.

次に動作について説明する。成形パンチ４に設けられた
複数個の小穴１６は第１５図に示すように、パンチプレ
ート２０に設けられたエアミゾ２１を通って、外部との
連絡口２２までつながる。この連絡口端２２にエアホー
スをつなぐと、図の矢印の如く、複数個の小穴より、エ
アー２３が吹かれるのである。これを第１６〜第１９図
の成形工程図で説明する。エアー小穴１６は略して記載
している。第１６〜第１８図まで成形された時第１８図
の位置の時点でタイミングをとってエアー２３を通す。
すると第１９図の如く、パンチ４が上昇する際に、製品
５はそのエアー圧力によって、スムーズにパンチ４より
離れていき、パッド３の上に残るのである。Next, the operation will be described. As shown in FIG. 15, the plurality of small holes 16 provided in the forming punch 4 pass through the air groove 21 provided in the punch plate 20 and reach the communication port 22 with the outside. When an air hose is connected to this communication port end 22, the air 23 is blown from a plurality of small holes as shown by the arrow in the figure. This will be described with reference to the molding process diagrams of FIGS. The air small hole 16 is abbreviated and described. When the molding is carried out from FIG. 16 to FIG. 18, the air 23 is passed through at the timing shown in FIG.
Then, as shown in FIG. 19, when the punch 4 rises, the product 5 is smoothly separated from the punch 4 by the air pressure and remains on the pad 3.

発明の効果このように、本発明によると以下の効果を有する。Effects of the Invention Thus, according to the present invention, the following effects are obtained.

(1) パンチへの製品のくらいつきが防止できる。(1) It is possible to prevent the product from sticking to the punch.

(2) 従って、プレス加工作業が、容易である。(2) Therefore, the press work is easy.

(3) 製品の変形もない。(3) No deformation of the product.

(4) 従って製品の不良も少なくコストメリットが高
い。(4) Therefore, there are few product defects and the cost merit is high.

(5) 又、製品の側面も、鋭角形状で成形できる。(5) Also, the side surface of the product can be formed in an acute angle shape.

(6) 更に、直角に近い、又は逆テーパ成形も、でき
る。(6) Further, near-right angle or reverse taper molding is also possible.

[Brief description of drawings]

第１図〜第４図は従来の各成形工程を示す金型の断面
図、第５図は製品のくらいつきを示す金型の断面図、第
６図は金型を示す一部断面図、第７図は第６図の一部を
調整した後の金型の一部断面図、第８図，第９図は各々
組合せ状態を示す製品の断面図、第１０図は製品の部分
斜視図、第１１図は同断面図、第１２図，第１３図は各
々パンチの断面図及び平面図、第１４図は加工の詳細を
示す金型の一部断面図、第１５図はエアー経路を示す金
型の断面図、第１６〜第１９図は本発明の一実施例にお
ける金型の成形工程を示す金型の断面図である。１……ダイ、２……ブランクホルダー、３……パッド、
４……パンチ、５……製品、１４……ヒモ成形部、１６
……小穴、２３……エアー。1 to 4 are cross-sectional views of a mold showing each conventional molding step, FIG. 5 is a cross-sectional view of a mold showing the degree of product, and FIG. 6 is a partial cross-sectional view showing the mold. FIG. 7 is a partial cross-sectional view of the mold after a part of FIG. 6 is adjusted, FIGS. 8 and 9 are cross-sectional views of the product showing a combined state, and FIG. 10 is a partial perspective view of the product. FIG. 11 is the same sectional view, FIGS. 12 and 13 are sectional and plan views of the punch, respectively, FIG. 14 is a partial sectional view of the die showing details of processing, and FIG. 15 is an air path. 16 to 19 are sectional views of the mold showing the molding process of the mold in one embodiment of the present invention. 1 ... die, 2 ... blank holder, 3 ... pad,
4 ... punch, 5 ... product, 14 ... string forming part, 16
... small holes, 23 ... air.

Claims

[Claims]

1. A mold for a shadow mask for molding a shadow mask having a perforated region in a central portion, a non-perforated region surrounding the perforated region, and a groove portion between the perforated region and the non-perforated region. An apparatus, which is arranged so as to be able to move up and down and has a convex portion for molding the groove portion of the shadow mask; A forming punch that has a concave portion and that inserts a shadow mask material before forming with the pad to form the entire shadow mask, a blank holder that is vertically movable around the forming punch, and a periphery of the pad And a molding die that is arranged so as to face the blank holder and that bends by pressing the peripheral portion of the shadow mask against the molding punch side portion with the blank holder. And a plurality of small holes for air supply are provided in the concave portion of the molding punch, and at the same time as the molding of the shadow mask is completed, air is supplied to the groove part of the shadow mask from the plurality of small holes for air supply, A shadow mask mold device, wherein the shadow mask after molding is separated from the molding punch.