JP2011213071A

JP2011213071A - Structure for fitting transfer member to mold

Info

Publication number: JP2011213071A
Application number: JP2010085815A
Authority: JP
Inventors: Keiichi Shiobara; 慶一塩原; Nobuyuki Soma; 信行相馬; Hirofumi Yanagisawa; 宏文柳澤
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2010-04-02
Filing date: 2010-04-02
Publication date: 2011-10-27

Abstract

PROBLEM TO BE SOLVED: To improve the durability of a mold by suppressing the peeling of a transfer member fitted to the molding surface of the mold.SOLUTION: A recess 5 is formed in the molding surface 3, and the transfer member 4 is fitted into the recess 5. By making the depth of the recess 5 equal to the thickness of the transfer member 4, the molding surface 3 and the surface of the transfer member 4 are made flat (flush). In the recess 5, in at least part of its side face 5a or in at least part of its bottom face 5b, an undercut shape is formed. The transfer member 4 is formed from a thermosetting resin or a photocurable resin and cured after being fitted into the recess 5.

Description

本発明は、金型への転写部材取付け構造に関するものである。 The present invention relates to a structure for attaching a transfer member to a mold.

従来、樹脂成形において、シボ模様を樹脂成形品に転写するために、金型表面に発生したピンホール、ヒケ、クラック等の微小凹凸部をパテで埋めて平滑に整えてから、シボ模様を有するシート（転写部材）を接着剤によって貼付けるものがあった（特許文献１参照）。 Conventionally, in resin molding, in order to transfer a texture pattern to a resin molded product, pinholes, sink marks, cracks, etc. generated on the mold surface are filled with putty and smoothed, and then the texture pattern is provided. There was one in which a sheet (transfer member) was attached with an adhesive (see Patent Document 1).

特開平１０−２４４５８８号公報Japanese Patent Laid-Open No. 10-244588

しかしながら、金型表面に対して単に接着剤で転写部材を貼付けるだけでは、金型表面から転写部材が剥離しやすいという問題があった。この問題は、金型表面の一部分だけに接着剤で転写部材を取付ける場合に特に顕著になる。
本発明の課題は、金型の成形面に取付けた転写部材の剥離を抑制し、金型の耐久性を向上させることである。 However, there is a problem that the transfer member is easily peeled off from the mold surface simply by sticking the transfer member to the mold surface with an adhesive. This problem is particularly noticeable when the transfer member is attached to only a part of the mold surface with an adhesive.
The subject of this invention is suppressing peeling of the transfer member attached to the molding surface of a metal mold | die, and improving durability of a metal mold | die.

本発明の一態様は、
樹脂成形の金型と、前記金型の成形面に形成された凹部と、前記凹部に嵌め込まれ成形品に意匠を転写する転写部材と、を備えることを特徴とする。
このように、金型の成形面に形成した凹部に転写部材を嵌め込むことで、単なるフラットな成形面に転写部材を出っ張った状態で取付ける場合と比較して、転写部材の剥離を抑制し、金型の耐久性を向上させることができる。 One embodiment of the present invention provides:
A resin-molding mold, a recess formed on the molding surface of the mold, and a transfer member that is fitted in the recess and transfers a design to a molded product.
In this way, by fitting the transfer member into the recess formed on the molding surface of the mold, compared to the case where the transfer member is mounted on the flat molding surface in a protruding state, the peeling of the transfer member is suppressed, The durability of the mold can be improved.

本発明の他の形態は、
前記凹部は、前記転写部材の厚みと同一深さに形成されることを特徴とする。
このように、凹部の深さを転写部材の厚みと同一にすることで、金型の成形面と転写部材の表面とをフラットになる。すなわち、金型の成形面に対する転写部材の出っ張りを防止できるので、転写部材の剥離を抑制し、金型の耐久性を向上させることができる。 Another aspect of the present invention is:
The recess is formed at the same depth as the thickness of the transfer member.
Thus, by making the depth of the recess the same as the thickness of the transfer member, the molding surface of the mold and the surface of the transfer member become flat. That is, since the protrusion of the transfer member with respect to the molding surface of the mold can be prevented, peeling of the transfer member can be suppressed and the durability of the mold can be improved.

本発明の他の形態は、
前記凹部は、側面及び底面の少なくとも一部に、アンダーカット形状が形成されることを特徴とする。
このように、凹部の側面や底面の一部にアンダーカット形状を形成することで、金型からの転写部材の剥離を抑制し、金型の耐久性を向上させることができる。 Another aspect of the present invention is:
The recess has an undercut shape formed on at least a part of a side surface and a bottom surface.
Thus, by forming the undercut shape on a part of the side surface and the bottom surface of the recess, it is possible to suppress peeling of the transfer member from the mold and improve the durability of the mold.

本発明の他の形態は、
前記転写部材は、熱硬化性樹脂又は光硬化性樹脂で形成されると共に、前記凹部に嵌め込まれてから硬化されることを特徴とする。
このように、転写部材を熱硬化性樹脂や光硬化性樹脂で形成し、凹部に嵌め込んでから硬化させることで、凹部への転写部材の嵌め込みを容易に行うことができる。 Another aspect of the present invention is:
The transfer member is formed of a thermosetting resin or a photocurable resin, and is cured after being fitted into the recess.
Thus, the transfer member can be easily fitted into the recess by forming the transfer member with a thermosetting resin or a photo-curable resin, and then curing the transfer member after fitting into the recess.

可動側金型及び固定側金型の概略構成図である。It is a schematic block diagram of a movable mold and a fixed mold. 凹部の側面に形成したアンダーカット形状を示す図である。It is a figure which shows the undercut shape formed in the side surface of a recessed part. 凹部の底面に形成したアンダーカット形状を示す図である。It is a figure which shows the undercut shape formed in the bottom face of a recessed part.

以下、本発明の実施形態を図面に基づいて説明する。
《構成》
図１は、可動側金型及び固定側金型の概略構成図である。
可動側金型１は、凸状に形成され、固定側金型２は、凹状に形成される。可動側金型１及び固定側金型２は、可動側金型１の成形面３と固定側金型２の成形面３を対向させて配置され、固定側金型２に対する可動側金型１の進退によって型の開閉が行われる。この型を閉じたときに、可動側金型１の成形面３と固定側金型２の成形面３によって形成された空洞部分がキャビティとなり、このキャビティに充填された溶融樹脂が冷却されて固化することで成形品が成形される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
"Constitution"
FIG. 1 is a schematic configuration diagram of a movable mold and a fixed mold.
The movable mold 1 is formed in a convex shape, and the fixed mold 2 is formed in a concave shape. The movable mold 1 and the fixed mold 2 are arranged with the molding surface 3 of the movable mold 1 and the molding surface 3 of the fixed mold 2 facing each other, and the movable mold 1 with respect to the fixed mold 2 is arranged. The mold is opened and closed by moving back and forth. When this mold is closed, a cavity formed by the molding surface 3 of the movable mold 1 and the molding surface 3 of the fixed mold 2 becomes a cavity, and the molten resin filled in the cavity is cooled and solidified. By doing so, a molded product is formed.

可動側金型１の成形面３及び固定側金型２の成形面３の少なくとも１つには、成形品に模様などの意匠を転写する転写部材４が取付けられる。具体的には、成形面３に凹部５が形成され、この凹部５に転写部材４が嵌め込まれる。凹部５の深さは、転写部材４の厚みと同一である。つまり、凹部５に転写部材４を嵌め込むと、成形面３と転写部材４の表面とがフラットになり、成形面３に対して転写部材４が出っ張らないように構成される。 At least one of the molding surface 3 of the movable mold 1 and the molding surface 3 of the fixed mold 2 is attached with a transfer member 4 for transferring a design such as a pattern to the molded product. Specifically, a recess 5 is formed in the molding surface 3, and the transfer member 4 is fitted into the recess 5. The depth of the recess 5 is the same as the thickness of the transfer member 4. That is, when the transfer member 4 is fitted into the recess 5, the molding surface 3 and the surface of the transfer member 4 are flat, and the transfer member 4 is configured not to protrude from the molding surface 3.

図２及び図３に示すように、凹部５には、側面５ａの少なくとも一部、又は底面５ｂの少なくとも一部に、アンダーカット形状、つまり転写部材４の抜け止め形状が形成され、このアンダーカット形状に係合するように転写部材４が嵌め込まれる。 As shown in FIGS. 2 and 3, the recess 5 is formed with an undercut shape, that is, a retaining shape of the transfer member 4 on at least a part of the side surface 5a or at least a part of the bottom surface 5b. The transfer member 4 is fitted so as to engage with the shape.

図２は、凹部の側面に形成したアンダーカット形状を示す図である。
凹部５の側面５ａでは、側面５ａを底面５ｂから上方に向かって凹部５の中心側に向かって傾斜させた逆テーパ形状としたり、側面５ａにおける底面５ｂから離れた位置に凹部５の中心側に向かって突出する突起やフランジを形成したり、側面５ａに対して深さ方向に並んだ断面三角状の複数の溝を周方向に沿って形成したりする。 FIG. 2 is a diagram showing an undercut shape formed on the side surface of the recess.
The side surface 5a of the recess 5 has a reverse taper shape in which the side surface 5a is inclined upward from the bottom surface 5b toward the center of the recess 5, or at a position away from the bottom surface 5b on the side surface 5a. Protrusions and flanges that protrude toward the surface are formed, and a plurality of triangular grooves that are arranged in the depth direction with respect to the side surface 5a are formed along the circumferential direction.

図３は、凹部の底面に形成したアンダーカット形状を示す図である。
凹部５の底面では、図２で示したようなアンダーカット形状を有し、凹部５よりも小さな底面用凹部６を、凹部５の底面に形成する。すなわち、底面用凹部６の側面を逆テーパ形状としたり、側面に突起やフランジを形成したり、複数の溝を形成したりする。 FIG. 3 is a diagram showing an undercut shape formed on the bottom surface of the recess.
On the bottom surface of the recess 5, a bottom surface recess 6 having an undercut shape as shown in FIG. 2 and smaller than the recess 5 is formed on the bottom surface of the recess 5. That is, the side surface of the recess 6 for the bottom surface is formed in a reverse taper shape, a protrusion or flange is formed on the side surface, or a plurality of grooves are formed.

転写部材４は、熱硬化性樹脂や光硬化性樹脂で形成され、凹部５に嵌め込まれてから熱や光によって硬化される。すなわち、転写部材４が可撓性を有するときに、撓ませながら凹部５のアンダーカット形状へと嵌め込み、それから硬化させる。なお、アンダーカット形状となる部位に、予め転写部材４と同一材料（熱硬化性樹脂や光硬化性樹脂）の粉体を充填させて、それから転写部材４を嵌め込んで熱や光によって硬化させてもよい。特に、図３のように、凹部５の底面５ｂに底面用凹部６を形成するような場合には、その底面用凹部６に、先ず転写部材４と同一材料の粉体を装入し、それから凹部５に単なる板状の転写部材４を嵌め込んで硬化処理を行うとよい（嵌め込みの容易性や転写部材４の成形性のため）。 The transfer member 4 is formed of a thermosetting resin or a photocurable resin, and is cured by heat or light after being fitted into the recess 5. That is, when the transfer member 4 has flexibility, the transfer member 4 is fitted into the undercut shape of the recess 5 while being bent and then cured. In addition, the portion of the undercut shape is previously filled with powder of the same material (thermosetting resin or photocurable resin) as the transfer member 4, and then the transfer member 4 is fitted and cured by heat or light. May be. In particular, as shown in FIG. 3, when the bottom surface recess 6 is formed on the bottom surface 5 b of the recess 5, the bottom material recess 6 is first charged with powder of the same material as the transfer member 4, and then A simple plate-shaped transfer member 4 may be fitted into the recess 5 for curing (for ease of fitting and moldability of the transfer member 4).

なお、側面５ａや底面５ｂに形成するアンダーカットの形状（角度や深さ等）、数、組合せについては任意とする。 Note that the shape (angle, depth, etc.), number, and combination of undercuts formed on the side surface 5a and the bottom surface 5b are arbitrary.

１…可動側金型、２…固定側金型、３…成形面、４…転写部材、５…凹部、５ａ…側面、５ｂ…底面、６…底面用凹部 DESCRIPTION OF SYMBOLS 1 ... Movable side metal mold, 2 ... Fixed side metal mold, 3 ... Molding surface, 4 ... Transfer member, 5 ... Recessed part, 5a ... Side surface, 5b ... Bottom surface, 6 ... Recessed part for bottom surface

Claims

Resin molds,
A recess formed in the molding surface of the mold;
And a transfer member that is fitted into the recess and transfers the design to the molded product.

The transfer member mounting structure for a mold according to claim 1, wherein the recess is formed at the same depth as the thickness of the transfer member.

The transfer member mounting structure for a mold according to claim 1, wherein the recess has an undercut shape formed in at least a part of a side surface and a bottom surface.

The mold according to any one of claims 1 to 3, wherein the transfer member is formed of a thermosetting resin or a photocurable resin and is cured after being fitted into the recess. A transfer member mounting structure.