JPH10272632A - Mold preparing master model and method for preparation of mold using the mold - Google Patents

Mold preparing master model and method for preparation of mold using the mold

Info

Publication number
JPH10272632A
JPH10272632A JP7943497A JP7943497A JPH10272632A JP H10272632 A JPH10272632 A JP H10272632A JP 7943497 A JP7943497 A JP 7943497A JP 7943497 A JP7943497 A JP 7943497A JP H10272632 A JPH10272632 A JP H10272632A
Authority
JP
Japan
Prior art keywords
mold
master model
product part
product
master
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
Application number
JP7943497A
Other languages
Japanese (ja)
Other versions
JP3142496B2 (en
Inventor
Masao Mizutani
政夫 水谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP09079434A priority Critical patent/JP3142496B2/en
Publication of JPH10272632A publication Critical patent/JPH10272632A/en
Application granted granted Critical
Publication of JP3142496B2 publication Critical patent/JP3142496B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To restain shrinkage of a mold in a longitudinal direction of a product part by a method wherein at least one recess (a notch) is formed from an edge part of a step in the case of providing the step between the product part and a master base. SOLUTION: On a step 4 provided between a product part 2 and a master base 3, a recess (a notch) 5 is formed from its edge part. When a mold is prepared by using a master model 1 in which the recess 5 is formed on the step 4, shrinkage of a mold between respective recesses 5 is successively restrained, and consequently shrinkage of the mold in a longitudinal direction of the product part 2 can be restrained. Even when the long sized part exists in the product part 2, a pattern or the like drawn on the product part 2 can be faithfully transferred to the mold. The number, size, shape, etc., of the recesses provided on the step are not especially limited, and can be appropriately determined according to a size, shape, etc., of the product part.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】 本発明は、プラスチックモ
デル等の鋳型として用いられる金型の作製のためのマス
ターモデル及びそれを用いた金型作製方法に関する。
TECHNICAL FIELD The present invention relates to a master model for manufacturing a mold used as a mold for a plastic model or the like, and a mold manufacturing method using the master model.

【0002】[0002]

【従来の技術】 マスターモデルとは、金型を作成する
ための鋳型となるものであり、マスターモデルには、そ
の形状及び表面に施された模様等を忠実に金型に転写で
きることが要求される。このようなマスターモデルとし
ては、従来より、図2(a)に示すように、製品部2と
その土台となるマスターベース3との間に、ステップ4
を設けたものが用いられている。ステップ4を設けるの
は、金型の作製において、ベリリウム銅等の金型材料が
凝固する際に、転写される金型の製品部が不均一に収縮
し、マスターモデル1の製品部2表面に施された微細な
線模様等が変形するのを防止するためである。
2. Description of the Related Art A master model is a mold for producing a mold, and the master model is required to be able to faithfully transfer the shape and the pattern applied to the surface to the mold. You. As such a master model, conventionally, as shown in FIG. 2A, a step 4 is provided between the product unit 2 and a master base 3 serving as a base thereof.
Is provided. The step 4 is provided because when the mold material such as beryllium copper is solidified in the production of the mold, the product portion of the mold to be transferred contracts unevenly, so that the surface of the product portion 2 of the master model 1 This is for preventing the applied fine line pattern or the like from being deformed.

【0003】 すなわち、図2(a)のようなステップ
付きのマスターモデル1を用いて金型作製を行うと、図
2(b)のように得られた金型6の外周部には枠部7が
形成されることになるが、金型材料の凝固時に、この枠
部7に相当する部分の製品部方向への収縮は、マスター
モデル1のステップ4によって抑えられ、結果的に金型
材料の製品部に相当する部分の収縮も抑制されることに
なる。
That is, when a mold is manufactured using a master model 1 having steps as shown in FIG. 2A, a frame 6 is formed on the outer periphery of the mold 6 obtained as shown in FIG. 7 are formed, but when the mold material solidifies, the shrinkage of the portion corresponding to the frame portion 7 toward the product portion is suppressed by step 4 of the master model 1, and as a result, the mold material The shrinkage of the part corresponding to the product part is also suppressed.

【0004】[0004]

【発明が解決しようとする課題】 しかしながら、上記
のようなステップが、金型の収縮の抑制に有効に働くの
は、マスターモデルの製品部の幅が比較的小さい部分の
みであり、図3に示すマスターモデル1のように、製品
部2に長尺の部分がある場合は、ステップ4を設けて
も、金型の長さ方向の収縮を抑制することは困難であっ
た。例えば、図3に示すマスターモデル1を用いて金型
を作製した場合には、マスターモデル1の製品部2の幅
方向に引いた線8が、金型材料の凝固時における長さ方
向の収縮により変形してしまうという問題があった。
However, the steps described above effectively work to suppress the shrinkage of the mold only in a portion where the width of the product portion of the master model is relatively small. When the product part 2 has a long part like the master model 1 shown in the drawing, it is difficult to suppress the shrinkage in the length direction of the mold even if the step 4 is provided. For example, when a mold is manufactured using the master model 1 shown in FIG. 3, a line 8 drawn in the width direction of the product part 2 of the master model 1 indicates a contraction in the length direction during solidification of the mold material. There is a problem that it is deformed due to.

【0005】 本発明は、かかる状況に鑑みてなされた
ものであり、その目的とするところは、製品部の長尺方
向における金型の収縮をも抑制することができ、製品部
に描かれた模様等を忠実に金型に転写することができる
マスターモデル及びその作製方法を提供することにあ
る。
The present invention has been made in view of such a situation, and an object of the present invention is to suppress the shrinkage of a mold in a longitudinal direction of a product part, and to draw the product part. An object of the present invention is to provide a master model capable of faithfully transferring a pattern or the like to a mold and a method for manufacturing the same.

【0006】[0006]

【課題を解決するための手段】 本発明によれば、製品
部とマスターベースとの間にステップを設けてなる金型
作製用マスターモデルであって、上記ステップの縁部よ
り少なくとも1つの凹部(切欠)を形成した金型作製用
マスターモデルが提供される。
According to the present invention, there is provided a mold manufacturing master model including a step provided between a product section and a master base, wherein at least one recess ( A notch is formed, and a master model for manufacturing a mold is provided.

【0007】 又、本発明によれば、上記の金型作製用
マスターモデルを用いて金型を作成する金型作製方法が
提供される。
Further, according to the present invention, there is provided a die manufacturing method for manufacturing a die using the above-described master model for manufacturing a die.

【0008】[0008]

【発明の実施の形態】 本発明のマスターモデルは、図
1に示すように、製品部2とマスターベース3との間に
設けられたステップ4に、その縁部より凹部(切欠)5
を形成したものである。このようにステップ4に凹部5
を形成したマスターモデル1を用いて金型の作製を行う
と、各凹部5間における金型の収縮が順次抑制される結
果、製品部2の長尺方向における金型の収縮を抑制する
ことができ、製品部2に長尺の部分がある場合でも、製
品部2に描かれた模様等を忠実に金型に転写することが
できる。
BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a master model according to the present invention is configured such that a step (notch) 5 is provided between a product portion 2 and a master base 3 from an edge thereof.
Is formed. Thus, the concave portion 5 is formed in the step 4.
When the mold is manufactured using the master model 1 in which the mold is formed, the contraction of the mold between the concave portions 5 is sequentially suppressed. As a result, the contraction of the mold in the longitudinal direction of the product portion 2 can be suppressed. Even if the product portion 2 has a long portion, the pattern drawn on the product portion 2 can be faithfully transferred to a mold.

【0009】 ステップに設ける凹部の数や寸法、形状
等は特に限定されず、製品部の大きさや形状等に応じて
適宜決めることができる。
The number, size, shape, and the like of the concave portions provided in the steps are not particularly limited, and can be appropriately determined according to the size, shape, or the like of the product portion.

【0010】 上記のマスターモデルを用いた金型の作
製は、通常のマスターモデルを用いた金型の作製と同様
の手順で行うことができる。
The manufacture of a mold using the above master model can be performed in the same procedure as the manufacture of a mold using a normal master model.

【0011】[0011]

【実施例】 以下、本発明を実施例に基づいて更に詳細
に説明するが、本発明はこれらの実施例によって制限さ
れるものではない。
EXAMPLES Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

【0012】(実施例1) ステップに、その縁部より
凹部(切欠)を形成した図1に示すマスターモデルを用
いて金型を作製し、その長尺方向における表面模様(図
1の線8)の歪みの程度を調べた。なお、凹部(切欠)
の数は5個とし、その寸法は幅3cm、深さ1cm、長
さ5cmとした。
(Example 1) In a step, a mold is manufactured using a master model shown in FIG. 1 in which a concave portion (notch) is formed from an edge thereof, and a surface pattern in a longitudinal direction thereof (line 8 in FIG. 1) is formed. ) Was examined for the degree of distortion. In addition, recess (notch)
The number was 5, and the dimensions were 3 cm in width, 1 cm in depth, and 5 cm in length.

【0013】 金型の作製は常法に従って行い、得られ
た金型の長尺方向における表面模様の歪みの程度を、線
8と線8’の幅の変化に基づいて調べた。なお、マスタ
ーモデルにおける線8と線8’は平行であり、この場合
における幅の変化を0とした。結果を表1に示す。
The fabrication of the mold was performed according to a conventional method, and the degree of distortion of the surface pattern in the longitudinal direction of the obtained mold was examined based on the change in the width between the line 8 and the line 8 ′. Note that the line 8 and the line 8 'in the master model are parallel, and the change in width in this case was set to 0. Table 1 shows the results.

【0014】(比較例1) ステップの縁部に凹部(切
欠)を有さないマスターモデルを用いて、実施例1と同
様の方法にて金型を作製し、その長尺方向における表面
模様の歪みの程度を、実施例1と同様の方法にて調べ
た。結果を表1に示す。
(Comparative Example 1) Using a master model having no concave portion (notch) at the edge of the step, a mold was manufactured in the same manner as in Example 1, and the surface pattern in the longitudinal direction was formed. The degree of distortion was examined in the same manner as in Example 1. Table 1 shows the results.

【0015】[0015]

【表1】 [Table 1]

【0016】 表1より、実施例1のマスターモデルを
用いた場合には、金型の長尺方向における表面模様の歪
みの程度は小さいのに対し、比較例1のマスターモデル
を用いた場合には、金型の長尺方向における表面模様の
歪みの程度が大きいことがわかる。
According to Table 1, when the master model of Example 1 was used, the degree of distortion of the surface pattern in the longitudinal direction of the mold was small, whereas when the master model of Comparative Example 1 was used. Shows that the degree of distortion of the surface pattern in the longitudinal direction of the mold is large.

【0017】[0017]

【発明の効果】 本発明のマスターモデルは、ステップ
に、その縁部より設けた凹部を有するため、各凹部間に
おける金型の収縮が順次抑制される結果、製品部の長尺
方向における金型の表面模様の歪みを抑制することがで
き、製品部に描かれた模様等を忠実に金型に転写するこ
とができる。従って、本発明のマスターモデルを用いて
製作した金型により製品を製造することにより、製品の
品質の向上を図ることができる。
According to the master model of the present invention, since the step has the concave portion provided from the edge thereof, the contraction of the die between the concave portions is sequentially suppressed, and as a result, the die in the longitudinal direction of the product portion is formed. Of the surface pattern can be suppressed, and the pattern or the like drawn on the product portion can be faithfully transferred to the mold. Therefore, the quality of the product can be improved by manufacturing the product using the mold manufactured using the master model of the present invention.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明のマスターモデルの一例を示す斜視図
である。
FIG. 1 is a perspective view showing an example of a master model of the present invention.

【図2】 (a)従来のマスターモデルの一例を示す斜
視図、及び(b)(a)に示すマスターモデルを用いて
製作した金型を示す斜視図である。
2A is a perspective view showing an example of a conventional master model, and FIGS. 2B and 2B are perspective views showing a mold manufactured using the master model shown in FIG.

【図3】 従来のマスターモデルの他の例を示す斜視図
である。
FIG. 3 is a perspective view showing another example of a conventional master model.

【符号の説明】[Explanation of symbols]

1…マスターモデル、2…製品部、3…マスターベー
ス、4…ステップ、5…凹部(切欠)、6…金型、7…
枠部、8…製品部の幅方向に引いた線。
DESCRIPTION OF SYMBOLS 1 ... Master model, 2 ... Product part, 3 ... Master base, 4 ... Step, 5 ... Recess (cutout), 6 ... Mold, 7 ...
Frame part, 8: Line drawn in the width direction of the product part.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 製品部とマスターベースとの間にステッ
プを設けてなる金型作製用マスターモデルであって、当
該ステップの縁より少なくとも1つの凹部(切欠)を形
成したことを特徴とする金型作製用マスターモデル。
1. A mold for producing a mold, comprising a step provided between a product section and a master base, wherein at least one recess (notch) is formed from an edge of the step. Master model for mold making.
【請求項2】 請求項1に記載の金型作製用マスターモ
デルを用いて金型を作成することを特徴とする金型作製
方法。
2. A method for manufacturing a mold, comprising using the master model for manufacturing a mold according to claim 1.
JP09079434A 1997-03-31 1997-03-31 Master model for mold making and mold making method using the same Expired - Fee Related JP3142496B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09079434A JP3142496B2 (en) 1997-03-31 1997-03-31 Master model for mold making and mold making method using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09079434A JP3142496B2 (en) 1997-03-31 1997-03-31 Master model for mold making and mold making method using the same

Publications (2)

Publication Number Publication Date
JPH10272632A true JPH10272632A (en) 1998-10-13
JP3142496B2 JP3142496B2 (en) 2001-03-07

Family

ID=13689783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09079434A Expired - Fee Related JP3142496B2 (en) 1997-03-31 1997-03-31 Master model for mold making and mold making method using the same

Country Status (1)

Country Link
JP (1) JP3142496B2 (en)

Also Published As

Publication number Publication date
JP3142496B2 (en) 2001-03-07

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