JP3703226B2

JP3703226B2 - Molding terminal processing method

Info

Publication number: JP3703226B2
Application number: JP25388496A
Authority: JP
Inventors: 浩二大屋
Original assignee: Inoac Corp
Current assignee: Inoac Corp
Priority date: 1996-09-03
Filing date: 1996-09-03
Publication date: 2005-10-05
Anticipated expiration: 2016-09-03
Also published as: JPH1076542A

Description

【０００１】
【発明の属する技術分野】
この発明はモールディング、特には自動車の保護・装飾用モールディングの端末加工方法に関する。
【０００２】
【従来の技術】
従来、自動車の車体側面には他物体との接触により車体側面が損傷するのを防ぎ、また車体側面の装飾も兼ねてモールディングが取り付けられている。このモールディングはプラスチックを材料としており、適度な弾力性と柔軟性のある軟質塩化ビニルなどの長尺押出し成形品よりなり、所定の長さに切断して用いられる。
【０００３】
前記モールディングとして押出成形品を切断したものをそのまま用いると、切断面の見栄えが悪かったり、尖った切断面が露出するという安全性の問題がある。
そこで、モールディングの端末部は、意匠上や安全性の観点から所定の曲線を有する形状に仕上げられている。その成形手段として端末部の熱プレス成形が提案されている。図６ではその成形工程を示す。
【０００４】
まず、（Ａ）図のように、あらかじめ押出し成形によって連続的に形成された一定断面形状を有するモールディング素材５０の裏面５２部の先端を切除して、この切除部５３が形成された当該端末部５１を加熱軟化してプレス成形型の下型６１の端末成形部６２内に導入する。符号Ｈはヒーター等の加熱手段である。
そして、（Ｂ）図ないし（Ｄ）図に示すようにプレス成形型の他方を構成する上型６４とで型閉めして前記端末部５１先端の切除部５３をモールディング素材５０の裏面５２側へ屈曲させて所定形状にプレス成形する。その際モールディング素材５０の端末部先端の余剰部５７は、下型６１に形成されている食い切り突部６３と上型６４に形成されている食い切り段部６５の間に挟まれて切除され、（Ｅ）図に示すモールディング５０Ａが得られる。なお、前記余剰部５７は、食い切り突部６３と食い切り段部６５間で挟まれて、薄皮状とされ、その後切除されることもある。
【０００５】
しかし、前記のような端末部のプレス成形にあっては、モールディング素材の端末部の先端裏面が切除され、また加熱軟化によってモールディング素材の変形性が高められているものの、モールディング素材５０の端末部が下型の端末部成形部６２への導入時に該端末成形部６２の型面に完全に追従しにくい場合がある。その結果、モールディング素材の端末部先端がモールディング素材の裏面側へ折り曲げられる前に上型の食い切り段部６５と下型の食い切り突部６３が端末部先端を挟むことがあり、その場合には図７に示すように、モールディング素材５０の端末部５１の表面５１Ａが下型の端末成形部６２の型面に密着せず、得られるモールディングの端末部に欠肉を生じるようになる。さらに、モールディング素材５０の端末部先端が上型の食い切り段部６５と下型の食い切り突部６３で挟まれた後に、モールディング素材５０端末部がさらに上型６４と下型６１でプレスされて伸ばされるため、この端末加工後になされる塗装工程における加熱等で前記端末部が収縮し、反りを生ずることがある。
【０００６】
これらの問題を回避するために、図８（Ａ）図に示すように上型７６の型面７７に突部７８を設けて、下型７５との型閉じ時に、まずその突部７８がモールディング素材７０の端末部７１裏面の非切除部を下型７５型面へ押しつけ、該端末部７１を下型７５の型面に沿わせてから上型７６の型面７７を端末部裏面７２に押し当てる方法が考えられる。しかし、この方法では（Ｂ）図に示すように、得られるモールディング７０Ａの端末部７１Ａ裏面に前記突部７８によって形成された穴７９を生じるため、自動車のボディへの接着の際に取り付け精度または接着強度が低下する等の不都合を生じる。
【０００７】
【発明が解決しようとする課題】
そこで、この発明は前記の点に鑑みなされたもので、モールディング素材の端末部裏面の先端部を部分的に切除して加熱軟化し所定形状にプレス成形するに際して、欠肉部を生じることなく、また、その後に反りを生じることのないモールディングの端末加工方法を提案するものである。
【０００８】
【課題を解決するための手段】
まず、モールディングの端末加工方法の発明は、一定断面形状を有するモールディング素材の端末部の先端裏面側を切除し、次いで当該端末部を加熱軟化して下型の端末成形部に導入し、あるいは当該端末部を下型の端末成形部に導入後加熱軟化させ、該下型に立設されている食い切り突部に前記切除後の先端部を載置した後、前記下型と上型を閉じて端末部をプレス成形することにより、前記端末部先端を端末部裏面側へ屈曲させて所定形状にするとともに、前記端末部先端の余剰部分を下型の食い切り突部と上型に形成されている食い切り段部間で挟んで食い切る、あるいは薄皮状にするモールディングの端末加工方法において、前記プレス成形時に、前記上型の型面に収納可能に突設した押し込み部材を、前記食い切り突部と食い切り段部がモールディング素材の端末部先端を挟む以前に、前記端末部裏面に押し当てて前記端末部を前記下型の端末成形部に押し込んで圧着することにより前記下型の端末成形部に沿って付形し、その後、前記食い切り突部と食い切り段部でモールディング素材の端末部先端を挟んで前記閉型を行うとともに、該閉型の完了時に前記押し込み部材を上型内に収納させることを特徴とする。
【０００９】
【発明の実施の形態】
以下添付の図面に従って、この発明を詳細に説明する。なお、説明の重複を防ぐため、モールディングの端末加工方法の説明中に加工装置の説明を含ませる。
図１はこの発明の加工方法に使用されるモールディング素材の端末部を裏面側から見た斜視図、図２ないし図５はこの発明の加工方法の一実施例を示す断面図であって、図２はモールディング素材の端末部を加熱している状態を示す断面図、図３は前記端末部を下型の端末成形部に導入した状態を示す断面図、図４は前記端末部の非切除部を押し込み部材が押圧している状態を示す断面図、図５は閉型が完了した状態を示す断面図である。
【００１０】
図１で示すように、この端末部１１の加工方法に使用されるモールディング素材１０は一定断面形状を有する押出成形品であり、あらかじめ所定の長さに切断されている。該端末部１１の先端１２の裏面１２ａ側は所定量切徐されて、溝状に形成されている。この先端１２裏面の切除は端末部１１のプレス成形時に先端１２部をモールディング素材１０の端末部裏面側へ曲げ易くするため、およびモールディング素材１０の端末部１１の外観を良好とするためになされる。符号１１ａはモールディング素材の端末部の裏面、１１ｂは該端末部の表面を示し、この表面１１ｂがモールディングの意匠面を構成する。
【００１１】
前記先端１２の裏面が切除されたモールディング素材１０の端末部１１を、図２に示すように、該裏面側１１ａからヒーター等の加熱手段Ｈによって加熱軟化し、前記裏面側１１ａが上向きとなるようにして加工装置２０の下型２１に載置し、図３ないし図５に示すように型閉めしてプレス成形する。なお、加熱手段Ｈを下型２１あるいは上型３１に設ける等して、モールディング素材１０の端末部１１を下型に載置した後加熱軟化するようにしてもよい。
【００１２】
前記加工装置２０は、図３および図４に示すように、下型２１と上型３１とよりなり、図示しないプレス装置により閉型およびプレス可能とされている。
下型２１には、所定のモールディング端末形状からなる端末成形部２２と、その先端に上型３１へ向けて立設された食い切り突部２３とを有する。前記端末成形部２２には前記加熱軟化されたモールディング素材１０の端末部１１が導入される。
前記食い切り突部２３は、前記モールディング素材１０の端末部の先端１２をモールディング素材１０の裏面側へ曲げるとともに、前記端末部１１の先端１２の余剰部１５を上型３１との間で切断するためのものである。そしてこの食い切り突部２３には、前記モールディング素材１０の端末部１１を端末成形部２２に導入する際にモールディング素材１０の端末部１１の先端１２が載置される。
【００１３】
上型３１には、前記下型２１の端末成形部２２に導入されたモールディング素材１０の端末部１１を裏面１１ａ側から押圧するための型面３３を有し、該型面３３には、前記モールディング素材１０の端末部１１裏面の非切除部分を下型２１へ向けて押すための押し込み部材４１と、前記下型２１の食い切り突部２３との間でモールディング素材１０の端末部先端１４を挟んで余剰部１５を切断する食い切り段部３２とを備えている。
【００１４】
前記押し込み部材４１は、図４に示す型閉めの際に、前記下型２１の食い切り突部２３と上型の食い切り段部３２がモールディング素材１０の端末部１１の先端１２を挟む以前に、前記端末部１１裏面の非切除部１３を下型２１側へ押圧して該端末部１１を下型の端末成形部２２に圧着させるように、上型の型面３３から突出して設けられている。この押し込み部材４１の位置は、端末部裏面側１１ａの非切除部１３を押圧できる位置であって、さらには端末部１１を下型２１の端末成形部２２に確実に押し込める位置にされる。なお、前記押し込み部材４１は、非切除部１３のみならず、切除部を押圧する位置であってもよい。また、この実施例の押し込み部材４１は棒状（ピン状）からなって、上型３１の型面３３に上下方向に沿って貫通形成された収納孔４２にコイルスプリング４３とともに取り付けられている。そして、その押し込み部材４１は前記コイルスプリング４３によって下型２１へ向けて突出するように付勢され、図５に示す閉型完了時点ではモールディング素材１０の端末部１１裏面に押されて上型３１の収納孔４２内に引っ込むようになっている。コイルスプリング４３のバネ弾性は、下型２１の端末成形部２２に導入された軟化状態のモールディング素材１０の端末部１１を、閉型に伴って押し込み部材４１が端末成形部２２に完全に押し込むことができ、また閉型完了時にはモールディング素材１０の端末部１１裏面に押されて押し込み部材４１が上型３１の収納孔４２内に引っ込むことのできるものとする。
【００１５】
なお、前記押し込み部材４１の上端外周にはフランジ４７が形成され、一方、前記収納孔４２の下端には内向きに係止部４６が突出形成され、前記押し込み部材４１が最も下方へ突出した際にフランジ４７と係止部４６が係合することによって、押し込み部材４１の脱落が防止されている。符号４４は、前記収納孔４２の上端を塞いでコイルスプリング４３を押さえる押さえ板、４５はその押さえ板４４を上型３１に固定するためのネジである。
【００１６】
また、前記押し込み部材４１が上型３１の型面３３から突出する長さｈは、該押し込み部材４１がモールディング素材１０の端末部１１を端末成形部２２に押し込んだ際に、端末部先端１２の厚さａと下型２１の食い切り突部２３の高さｂを合計したａ＋ｂよりも大にする必要がある。つまり、モールディング素材１０の端末部１１が下型２１の端末成形部２２に沿う以前に端末部先端１４が食い切り突部２３と食い切り段部３２によって挟まれ、端末部１１の押圧変形が妨げられるのを防ぐためである。
【００１７】
前記下型２１と上型３１の閉型によるモールディング素材１０端末部１１のプレス成形時、まず、前記端末部１１裏面の非切除部分が押し込み部材４１により押圧され、前記食い切り突部２３上の端末部１１先端１２が端末部裏面側１１ａへ屈曲する。そして、前記端末部１１が下型２１の端末成形部２２に圧着して該端末成形部２２に沿って付形される。そのため、モールディング素材１０の端末部１１の表面１１ｂと下型２１の端末成形部２２間に隙間を生じず、欠肉のないモールディングの端末部が形成される。
【００１８】
そして、さらなる閉型およびプレスにより、前記食い切り突部２３上に載置されている端末部先端１４の余剰部１５は、図５のように、その基部１６が前記食い切り突部２３と上型３１の食い切り段部３２間で挟まれて切断され、余剰部１５が除去される。なお、前記食い切り突部２３と食い切り段部３２間によって余剰部１５が完全に切除されず、薄皮一枚でつながった状態になった場合は、成形品の脱型後等、適宜の時点で前記薄皮部分で余剰部１５を切除する。また、前記閉型完了時点における上型３１の型面３３とモールディング素材１０端末部裏面１１ａとの当接により、それまで上型３１の型面３３から突出していた押し込み部材４１がモールディング素材１０の端末部裏面１１ａで押し上げられて、上型３１の型面３３の収納部４２に収納される。その結果、モールディング素材１０の端末部裏面側１１ａは上型３１の型面３３によって平らな状態で押圧される。
【００１９】
その後、下型２１と上型３１を開けて、成形品を取り出せば、所望形状に加工されたモールディングの端末部が得られる。
このようにして加工されたモールディングの端末部は、前記下型２１の端末成形部２２に沿って正確に付形されており、欠肉のないものである。しかも、前記プレス成形の初期の時点で、モールディング素材１０の端末部１１の先端１２が食い切り突部２３と食い切り段部３２間で挟まれないため、端末部１１が過剰に伸ばされず、その後に行われるモールディング塗装時の加熱等によっても前記端末部が収縮して反りを生じず、良好な外観が得られる。
【００２０】
なお、前記実施例では、押仕込み部材４１をコイルスプリング４３によって上型３１の型面から突出および収納可能に構成したが、シリンダ装置等によって押し込み部材を上型の型面から突出および収納可能に構成してもよい。
【００２１】
【発明の効果】
以上図示し説明したように、この発明のモールディングの端末加工方法によれば、下型の食い切り突部と上型の食い切り段部間でモールディング素材の端末部先端が挟まれる以前に、端末部の非切徐部を押し込み部材によって下型側へ押圧するので、モールディング素材の端末部は下型の端末成形部に正しく沿った形状に付形され、欠肉等のない良好な外観のモールディング端末部が得られる。
【００２２】
また、閉型完了時には前記押し込み部材が上型の型面に収納されるので、モールディングの端末部裏面は凹凸のない平らな面に形成される。したがって、モールディングを自動車本体へ取り付ける際に確実かつ強固に取り付けることができるようになる。
【図面の簡単な説明】
【図１】この発明の加工方法に使用されるモールディング素材の端末部を裏面側から見た斜視図である。
【図２】この発明の加工方法の一実施例を示す断面図であって、モールディング素材の端末部を加熱している状態を示す断面図である。
【図３】前記端末部を加工装置の下型に載置した状態を示す断面図である。
【図４】前記端末部の非切除部を押し込み部材が押圧している状態を示す断面図である。
【図５】閉型が完了した状態を示す断面図である。
【図６】従来のプレス成形における端末部の成形過程を示す断面図である。
【図７】従来のプレス成形における問題点を示す断面図である。
【図８】プレス成形において、上型に突部を設けたプレス型を使用した場合を示す断面図である。
【符号の説明】
１０モールディング素材
１１端末部
１１ａ端末部裏面
１２端末部の先端
２０加工装置
２１下型
２２端末成形部
２３食い切り突部
３１上型
３２食い切り段部
３３上型の型面
４１押し込み部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal processing method for molding, particularly automobile molding for protection and decoration.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a molding is attached to a side surface of a vehicle to prevent the side surface of the vehicle from being damaged due to contact with other objects and also to decorate the side of the vehicle. This molding is made of plastic, and is made of a long extruded product such as soft vinyl chloride having appropriate elasticity and flexibility, and is cut into a predetermined length and used.
[0003]
If the molding obtained by cutting an extruded product is used as it is, there is a problem in safety that the cut surface looks bad or a sharp cut surface is exposed.
Therefore, the molding terminal is finished in a shape having a predetermined curve from the viewpoint of design and safety. As the forming means, hot press forming of a terminal portion has been proposed. FIG. 6 shows the molding process.
[0004]
First, as shown in FIG. 5A, the end portion of the back surface 52 of the molding material 50 having a constant cross-sectional shape that has been continuously formed by extrusion molding in advance is excised, and the terminal portion in which the excision 53 is formed. 51 is heated and softened and introduced into the terminal molding portion 62 of the lower mold 61 of the press mold. Reference numeral H denotes a heating means such as a heater.
Then, as shown in FIGS. (B) to (D), the mold is closed with the upper mold 64 constituting the other of the press molds, and the cutout portion 53 at the tip of the terminal portion 51 is moved to the back surface 52 side of the molding material 50. It is bent and press-molded into a predetermined shape. At that time, the surplus portion 57 at the end of the end portion of the molding material 50 is sandwiched between the cut-out projection 63 formed in the lower mold 61 and the cut-out step 65 formed in the upper mold 64, and is cut out ( E) A molding 50A shown in the figure is obtained. The surplus portion 57 may be sandwiched between the biting protrusion 63 and the biting step portion 65 to have a thin skin shape, and then cut off.
[0005]
However, in the press molding of the terminal portion as described above, although the tip back surface of the molding material terminal portion is cut out and the deformability of the molding material is enhanced by heat softening, the terminal portion of the molding material 50 However, there are cases where it is difficult to completely follow the mold surface of the terminal molding part 62 when it is introduced into the terminal molding part 62 of the lower mold. As a result, the upper die cut-off step 65 and the lower die cut-off projection 63 may sandwich the tip of the end of the molding material before the end of the molding material is bent toward the back side of the molding material. 7, the surface 51 </ b> A of the terminal portion 51 of the molding material 50 is not in close contact with the mold surface of the lower mold forming portion 62, and the resulting molding has a lack of thickness. Further, after the end of the molding material 50 is sandwiched between the upper die cut-off step 65 and the lower die cut-out projection 63, the molding material 50 terminal is further pressed and extended by the upper die 64 and the lower die 61. Therefore, the terminal portion may shrink and be warped due to heating or the like in the coating process performed after the terminal processing.
[0006]
In order to avoid these problems, a protrusion 78 is provided on the mold surface 77 of the upper mold 76 as shown in FIG. 8A, and when the mold is closed with the lower mold 75, the protrusion 78 is first molded. The uncut portion of the back surface of the terminal portion 71 of the material 70 is pressed against the lower mold 75 mold surface, the terminal portion 71 is aligned with the mold surface of the lower mold 75, and then the mold surface 77 of the upper mold 76 is pressed against the terminal portion rear surface 72. A method of hitting can be considered. However, in this method, as shown in FIG. (B), a hole 79 formed by the projection 78 is formed on the back surface of the terminal portion 71A of the molding 70A to be obtained. This causes inconveniences such as a decrease in adhesive strength.
[0007]
[Problems to be solved by the invention]
Therefore, the present invention has been made in view of the above points, when partially cutting the distal end portion of the back surface of the molding material to heat soften and press-mold into a predetermined shape, without causing a lacking portion, Further, the present invention proposes a molding terminal processing method that does not cause warping thereafter.
[0008]
[Means for Solving the Problems]
First, the invention of the molding terminal processing method is to cut off the tip back side of the terminal part of the molding material having a constant cross-sectional shape, and then heat soften the terminal part and introduce it into the lower terminal molding part, or After introducing the terminal part into the terminal molding part of the lower mold, heating and softening, placing the tip after cutting on the cut-out protrusion standing on the lower mold, and then closing the lower mold and the upper mold By press-molding the terminal portion, the end of the terminal portion is bent toward the back surface side of the terminal portion so as to have a predetermined shape, and the surplus portion of the end of the terminal portion is formed into a lower die cutting protrusion and an upper die. In the terminal processing method of the molding that is sandwiched between the cut-off step portions or thinned to form a thin skin, the pressing member that protrudes so as to be housed on the mold surface of the upper mold is pressed with the cut-out projection portion during the press molding. Before the parts are sandwich the terminal tip of the molding material, with along the terminal forming portion of the lower die by pressed against the rear surface the terminal portion crimping push the terminal portion to the terminal forming portion of the lower die After that, the mold is closed by sandwiching the leading end of the molding material between the cutting protrusion and the cutting step, and the pushing member is stored in the upper mold when the closing is completed. To do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In order to prevent duplication of explanation, the explanation of the processing apparatus is included in the explanation of the molding terminal processing method.
FIG. 1 is a perspective view of a molding material used in the processing method of the present invention as seen from the back side, and FIGS. 2 to 5 are sectional views showing an embodiment of the processing method of the present invention. 2 is a cross-sectional view showing a state in which the end portion of the molding material is heated, FIG. 3 is a cross-sectional view showing a state in which the end portion is introduced into a lower mold end forming portion, and FIG. 4 is a non-cut portion of the end portion. FIG. 5 is a cross-sectional view showing a state in which the closing mold is completed.
[0010]
As shown in FIG. 1, the molding material 10 used in the method for processing the terminal portion 11 is an extruded product having a constant cross-sectional shape, and is cut into a predetermined length in advance. The back surface 12a side of the tip 12 of the terminal portion 11 is cut by a predetermined amount and formed into a groove shape. The cutting of the back surface of the tip 12 is performed in order to make it easy to bend the tip 12 to the back side of the terminal part of the molding material 10 during press molding of the terminal part 11 and to improve the appearance of the terminal part 11 of the molding material 10. . Reference numeral 11a denotes the back surface of the terminal portion of the molding material, 11b denotes the surface of the terminal portion, and the front surface 11b forms the design surface of the molding.
[0011]
As shown in FIG. 2, the end portion 11 of the molding material 10 from which the back surface of the tip 12 is cut is softened by heating means H such as a heater from the back surface side 11a so that the back surface side 11a faces upward. Then, it is placed on the lower mold 21 of the processing apparatus 20, and the mold is closed and press-molded as shown in FIGS. Note that the heating means H may be provided on the lower mold 21 or the upper mold 31 so that the terminal portion 11 of the molding material 10 is placed on the lower mold and then softened by heating.
[0012]
As shown in FIGS. 3 and 4, the processing device 20 includes a lower die 21 and an upper die 31, and can be closed and pressed by a pressing device (not shown).
The lower mold 21 has a terminal molding portion 22 having a predetermined molding terminal shape, and a biting protrusion 23 erected toward the upper mold 31 at the tip thereof. The terminal molding part 22 is introduced with the terminal part 11 of the molding material 10 that has been heat-softened.
The cutout protrusion 23 bends the distal end 12 of the end portion of the molding material 10 toward the back side of the molding material 10 and cuts the surplus portion 15 of the distal end 12 of the end portion 11 with the upper mold 31. belongs to. Then, the leading edge 12 of the terminal portion 11 of the molding material 10 is placed on the biting protrusion 23 when the terminal portion 11 of the molding material 10 is introduced into the terminal molding portion 22.
[0013]
The upper mold 31 has a mold surface 33 for pressing the terminal portion 11 of the molding material 10 introduced into the terminal molding portion 22 of the lower mold 21 from the back surface 11a side. The distal end 14 of the molding material 10 is sandwiched between the pushing member 41 for pushing the non-removed portion of the back surface of the molding material 10 toward the lower mold 21 and the biting protrusion 23 of the lower mold 21. And a cut-off step portion 32 for cutting the surplus portion 15.
[0014]
When the pressing member 41 closes the mold shown in FIG. 4, before the biting protrusion 23 of the lower mold 21 and the biting step 32 of the upper mold sandwich the tip 12 of the terminal portion 11 of the molding material 10, The terminal portion 11 is provided so as to protrude from the upper mold surface 33 so as to press the non-removed portion 13 on the back surface of the terminal portion 11 toward the lower mold 21 and press the terminal portion 11 against the terminal molding portion 22 of the lower mold. The position of the pushing member 41 is a position where the non-cut portion 13 on the terminal portion back surface side 11a can be pressed, and further the position where the terminal portion 11 can be surely pushed into the terminal molding portion 22 of the lower mold 21. The pushing member 41 may be a position that presses not only the non-cut portion 13 but also the cut portion. Further, the pushing member 41 of this embodiment has a rod shape (pin shape), and is attached together with the coil spring 43 to a storage hole 42 formed through the mold surface 33 of the upper mold 31 along the vertical direction. The pushing member 41 is urged by the coil spring 43 so as to protrude toward the lower die 21, and is pushed against the back surface of the terminal portion 11 of the molding material 10 at the time of closing the mold shown in FIG. Is retracted into the storage hole 42. The spring elasticity of the coil spring 43 is such that the pushing member 41 completely pushes the terminal part 11 of the molding material 10 in the softened state introduced into the terminal molding part 22 of the lower mold 21 into the terminal molding part 22 as the mold is closed. In addition, when the mold closing is completed, it is assumed that the pushing member 41 can be retracted into the storage hole 42 of the upper mold 31 by being pushed against the back surface of the terminal portion 11 of the molding material 10.
[0015]
A flange 47 is formed on the outer periphery of the upper end of the push-in member 41, while a locking portion 46 is formed inwardly projecting at the lower end of the storage hole 42 so that the push-in member 41 protrudes most downward. Since the flange 47 and the engaging portion 46 are engaged with each other, the push-in member 41 is prevented from falling off. Reference numeral 44 denotes a pressing plate that closes the upper end of the storage hole 42 and presses the coil spring 43, and 45 is a screw that fixes the pressing plate 44 to the upper mold 31.
[0016]
The length h of the pushing member 41 protruding from the mold surface 33 of the upper die 31 is such that when the pushing member 41 pushes the terminal portion 11 of the molding material 10 into the terminal molding portion 22, The thickness a and the height b of the cut-out projection 23 of the lower mold 21 need to be larger than the sum a + b. That is, before the terminal part 11 of the molding material 10 extends along the terminal molding part 22 of the lower mold 21, the terminal part tip 14 is sandwiched between the biting protrusion 23 and the biting step part 32, and the pressing deformation of the terminal part 11 is prevented. Is to prevent.
[0017]
At the time of press molding of the molding material 10 terminal portion 11 by closing the lower die 21 and the upper die 31, first, a non-removed portion on the back surface of the terminal portion 11 is pressed by a pushing member 41, and the terminal on the biting protrusion 23. The tip 12 of the part 11 bends toward the terminal part back side 11a. The terminal portion 11 is crimped to the terminal molding portion 22 of the lower mold 21 and shaped along the terminal molding portion 22. Therefore, there is no gap between the surface 11b of the terminal part 11 of the molding material 10 and the terminal molding part 22 of the lower mold 21, and a molding terminal part without a lack of thickness is formed.
[0018]
Then, by further closing and pressing, the surplus portion 15 of the end 14 of the terminal portion placed on the cut-out projection 23 is formed such that the base 16 thereof has the cut-out projection 23 and the upper die 31 as shown in FIG. The excess portion 15 is removed by being sandwiched between the cut-off step portions 32 and cut. In addition, when the surplus portion 15 is not completely excised between the biting protrusion 23 and the biting stepped portion 32 and is connected with a single thin skin, after the molded product is removed, the The surplus portion 15 is cut off at the thin skin portion. In addition, the pressing member 41 that has been protruding from the mold surface 33 of the upper mold 31 until the mold surface 33 of the upper mold 31 by the contact between the mold surface 33 of the upper mold 31 and the molding material 10 rear surface 11a at the time of completion of the mold closing is formed on the molding material 10. It is pushed up by the terminal part back surface 11 a and is stored in the storage part 42 of the mold surface 33 of the upper mold 31. As a result, the terminal portion rear surface side 11 a of the molding material 10 is pressed in a flat state by the mold surface 33 of the upper mold 31.
[0019]
Then, if the lower mold | type 21 and the upper mold | type 31 are opened and a molded article is taken out, the terminal part of the molding processed into the desired shape will be obtained.
The molding terminal portion thus processed is accurately shaped along the terminal molding portion 22 of the lower mold 21 and has no lack of thickness. In addition, since the tip 12 of the end portion 11 of the molding material 10 is not sandwiched between the cut-out projection 23 and the cut-off step 32 at the initial stage of the press molding, the end portion 11 is not extended excessively, Even when the molding is heated, the terminal portion shrinks and does not warp, and a good appearance can be obtained.
[0020]
In the above-described embodiment, the push-in member 41 is configured to be protruded and stored from the mold surface of the upper mold 31 by the coil spring 43. However, the push-in member can be protruded and stored from the mold surface of the upper mold by a cylinder device or the like. It may be configured.
[0021]
【The invention's effect】
As illustrated and described above , according to the molding terminal processing method of the present invention, before the tip end of the molding material is sandwiched between the lower die cutting protrusion and the upper die cutting step, Because the non-cutting part is pressed to the lower mold side by the pushing member, the molding material terminal part is shaped into a shape that is correctly aligned with the lower mold terminal molding part, and the molding terminal part has a good appearance without any lack of thickness. Is obtained.
[0022]
Further, since the pushing member is housed in the upper mold surface when the mold closing is completed, the rear surface of the molding terminal is formed on a flat surface without unevenness. Therefore, it is possible to securely and firmly attach the molding to the automobile body.
[Brief description of the drawings]
FIG. 1 is a perspective view of a terminal portion of a molding material used in the processing method of the present invention as seen from the back side.
FIG. 2 is a cross-sectional view showing an embodiment of the processing method of the present invention, and is a cross-sectional view showing a state in which a terminal portion of a molding material is heated.
FIG. 3 is a cross-sectional view showing a state where the terminal portion is placed on a lower mold of a processing apparatus.
FIG. 4 is a cross-sectional view showing a state in which a pushing member is pushing a non-cut portion of the terminal portion.
FIG. 5 is a cross-sectional view showing a state in which closing is completed.
FIG. 6 is a cross-sectional view showing a molding process of a terminal portion in conventional press molding.
FIG. 7 is a cross-sectional view showing a problem in conventional press molding.
FIG. 8 is a cross-sectional view showing a case where a press die provided with a protrusion on an upper die is used in press molding.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Molding material 11 Terminal part 11a Terminal part back surface 12 End part of terminal part 20 Processing device 21 Lower mold 22 Terminal molding part 23 Cut-off projection 31 Upper mold 32 Cut-off step part 33 Upper mold surface 41 Pushing member

Claims

Cut off the tip back side of the molding material end with a constant cross-sectional shape, then heat soften the end and introduce it into the lower mold terminal, or introduce the terminal into the lower mold part The terminal is formed by press-molding the terminal part by closing the lower mold and the upper mold after the post-removal tip is placed on the cut-out projecting part standing on the lower mold after post-softening Bend the tip of the part to the back side of the terminal part to have a predetermined shape, and bite by sandwiching the surplus part of the tip of the terminal part between the lower die cutting protrusion and the cutting step formed on the upper mold, or In the terminal processing method of molding to make thin skin,
Wherein at the time of press molding, a pushing member which projects so as to be accommodated in the mold surface of the upper mold, before the step part outright eating a projection-away eating the sandwich the terminal tip of the molding material, is pressed against the rear surface the terminal portion The end portion is shaped along the lower end molding portion by pressing the end portion into the lower end molding portion and then crimping, and then the end of the molding material end is cut by the biting protrusion and the biting step. A molding terminal processing method, wherein the closing mold is sandwiched and the pushing member is housed in an upper mold when the closing is completed.