JPH0340577Y2 - - Google Patents
Info
- Publication number
- JPH0340577Y2 JPH0340577Y2 JP1985145056U JP14505685U JPH0340577Y2 JP H0340577 Y2 JPH0340577 Y2 JP H0340577Y2 JP 1985145056 U JP1985145056 U JP 1985145056U JP 14505685 U JP14505685 U JP 14505685U JP H0340577 Y2 JPH0340577 Y2 JP H0340577Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- runner
- pin
- mold surface
- mixer
- 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
Links
- 238000001125 extrusion Methods 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 8
- 238000005266 casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、リアクシヨン、インジエクシヨンモ
ールデイング（Reaction，Injection Molding、
以下RIMと略す）工法に使用する成形用モール
ドに関するものである。[Detailed description of the invention] (Industrial application field) This invention is applicable to reaction, injection molding,
This relates to the mold used in the (hereinafter abbreviated as RIM) construction method.
（従来の技術）
RIM成形は、例えば、ポリオール、ポリイソ
シアネートの各液状物をそれぞれ高圧力、高速度
で上下一対の型からなるモールドに注入して高速
反応により硬化させる工法であり、モールド近辺
に注型ヘツドを取り付け、注型ヘツド内でポリオ
ール、ポリイソシアネートを混合、撹拌し、それ
らの混合物をモールド内に注入し成形する。(Prior art) RIM molding is a method in which liquid materials such as polyol and polyisocyanate are injected into a mold consisting of a pair of upper and lower molds at high pressure and high speed, and cured by a high-speed reaction. A casting head is attached, the polyol and polyisocyanate are mixed and stirred in the casting head, and the mixture is injected into the mold and formed.
ところで、かかるRIM成形では、原料の混合、
撹拌の程度が製品の品質に大きな影響を与える
が、一般に注型ヘツド内の混合、撹拌のみでは不
充分であり、モールドにおいても原料の混合撹拌
を進行させるためにモールドの原料注入口付近
に、所謂、アフターミキサーと呼ばれるものを設
けることが多い。 By the way, in such RIM molding, mixing of raw materials,
The degree of agitation has a great effect on the quality of the product, but in general, mixing and agitation in the casting head alone is insufficient, and in order to advance the mixing and agitation of the raw materials in the mold, there is a What is called an after mixer is often provided.
第１１図は現在、一般に知られているこの種、
RIM成形に用いられるモールドの代表的な１例
であり、図において１はモールド、２は注型ヘツ
ド、５は製品部を示し、３の部分をアフターミキ
サー部、４の部分をランナー部と夫々称してい
る。 Figure 11 shows this species that is currently generally known.
This is a typical example of a mold used for RIM molding. In the figure, 1 is the mold, 2 is the casting head, and 5 is the product part. The part 3 is the after mixer part, and the part 4 is the runner part. It is called.
しかして、これらアフターミキサー部３及びラ
ンナー部４は図示の如く原料が最初にモールドに
入る部分であり、原料の撹拌が未だ充分でないた
め一般的に成形物の離型性が劣るという問題を有
している。 However, as shown in the figure, these after-mixer section 3 and runner section 4 are the sections where the raw materials first enter the mold, and since the raw materials are not sufficiently stirred, they generally have a problem of poor mold release properties of molded products. are doing.
又、種々の事情からアフターミキサー部３を設
けない場合には、所謂、前記ランナー部が原料が
最初にモールドに入る部分となり、上述同様、原
料の撹拌が未だ充分でないことから成形物の離型
性が悪く、取り外しに時間がかかり、大量生産を
行う際の障害となつている。 Furthermore, if the after-mixer section 3 is not provided due to various circumstances, the so-called runner section becomes the section where the raw material first enters the mold, and as mentioned above, the raw material is not sufficiently stirred and the molded product cannot be released from the mold. It has poor performance and takes time to remove, which is an obstacle to mass production.
そこで、このようなアフターミキサー部、ラン
ナー部の成形物の脱型を容易にするために従来に
あつてはこの部分に多量の離型剤を塗布したり、
あるいは樹脂コーテイングをすることが行われて
いた。 Therefore, in order to facilitate demolding of molded products in the after mixer section and runner section, conventionally, a large amount of mold release agent was applied to these parts, or
Alternatively, resin coating was used.
（考案が解決しようとする問題点）
しかしながら、上記アフターミキサー部、ラン
ナー部は原料が大量に、しかも高速に通過する部
分であり、これらの通過に伴つて折角の離型剤、
コーテイング樹脂が成形用原料に削り取られるこ
とがあり、そのため何れも離型効果は永続しなか
つた。(Problems to be solved by the invention) However, the above-mentioned aftermixer section and runner section are sections through which a large amount of raw materials pass through at high speed, and as the raw materials pass through these sections, release agents, mold release agents, etc.
The coating resin was sometimes scraped off by the molding raw material, so the mold release effect was not permanent in either case.
本考案は、かかる実状に着目し、その欠陥を解
消し、当該部分の離型作業を容易にし、かつ離型
効果に永続性を有する成形用モールドを提供する
ことによりRIM成形の作業能率の向上に寄与す
ることを目的とするものである。 The present invention focuses on the actual situation and improves the work efficiency of RIM molding by eliminating the defects, facilitating the mold release work of the relevant part, and providing a mold that has a permanent mold release effect. The purpose is to contribute to the
（問題点を解決するための手段）
即ち、本考案の特徴とするところは、上下一対
の型からなるモールドを、相対向する型面をもつ
て組み合わせ、その少なくとも一方の型面にラン
ナー部、又はアフターミキサー部とランナー部を
具えたRIM成形用モールドにおいて、上記一方
のランナー部あるいはアフターミキサー部の真下
に穴を設け、該穴に底部に押圧機構を有すると共
に、その先端部で該先端部と、これに対向する他
方の型表面との少なくとも一方に溝又は突起を有
して両者が互いに当接したとき、他方の型表面と
の間にランナー部あるいはアフターミキサー部の
流路の一部を形成する押出しピンを挿入し、上下
型の型締めの際に上記押出しピンの先端部が他方
の型表面に当接して押出しピンと他方の型表面と
の間に形成される前記流路の一部とモールドのラ
ンナー部あるいはアフターミキサー部の流路とが
連通する如くなした構成にある。(Means for Solving the Problems) That is, the present invention is characterized by combining molds consisting of a pair of upper and lower molds with opposing mold surfaces, and at least one of the mold surfaces has a runner portion, Or, in a mold for RIM forming equipped with an after mixer part and a runner part, a hole is provided directly below one of the runner parts or the after mixer part, and the hole has a pressing mechanism at the bottom, and the tip part and the other mold surface facing it, and when the two are in contact with each other, there is a part of the flow path of the runner part or the aftermixer part between the other mold surface and the other mold surface. When the upper and lower molds are clamped, the tip of the ejector pin comes into contact with the surface of the other mold, and one of the channels formed between the ejector pin and the surface of the other mold is inserted. The structure is such that the part and the flow path of the runner part of the mold or the aftermixer part communicate with each other.
（作用）
しかして、上述の如く構成したRIM成形用モ
ールドは上記押出ピンが上下型を合わせた時は、
対向する型表面一部に当たつて押し下げられ、ピ
ン先端部と当接型表面との間に形成される流路の
一部は原料の通り道の一部、即ち、アフターミキ
サー部、ランナー部の一部となる。そして、原料
硬化後、上下の型を割り開いた際は、ばね等の加
圧によりアフターミキサー部、ランナー部の成形
物と共に押し上げ、アフターミキサー部、ランナ
ー部の成形物の脱型を容易にする。(Function) However, in the RIM mold configured as described above, when the extrusion pin aligns the upper and lower molds,
A part of the flow path formed between the tip of the pin and the surface of the abutting mold, which is pressed down by hitting a part of the opposing mold surface, is a part of the passage of the raw material, i.e., the aftermixer part and the runner part. Become a part. After the raw materials have hardened, when the upper and lower molds are split open, the molded parts of the aftermixer part and runner part are pushed up together with the molded parts of the aftermixer part and runner part by the pressure of springs, etc., making it easier to demold the molded parts of the aftermixer part and runner part. .
（実施例）
以下、更に添付図面を参照し、本考案の実施例
を説明する。(Embodiments) Hereinafter, embodiments of the present invention will be described with further reference to the accompanying drawings.
第１図は本考案に係るモールドの１例として下
型６のアフターミキサー部、ランナー部の平面図
を示し、図において７はアフターミキサー部、８
はランナー部で、下型６にこれら両部７，８が設
けられていることは第１１図における従来例と同
様であるが、本考案に係る第１図においては、更
に前記ランナー部８の真下に穴９が設けられ、該
穴９に本考案の要部をなす押出しピン１０が挿入
されている。 FIG. 1 shows a plan view of the after mixer part and the runner part of the lower mold 6 as an example of the mold according to the present invention. In the figure, 7 is the after mixer part, 8
is a runner part, and the fact that both parts 7 and 8 are provided on the lower mold 6 is similar to the conventional example shown in FIG. 11, but in FIG. A hole 9 is provided directly below, and an extrusion pin 10, which is a main part of the present invention, is inserted into the hole 9.
この押出しピン１０は例えば第２図に示す如き
構成からなり、頂部に溝１１、中間部に原料の自
己シール生成用溝１２を有すると共に、下部が太
径となつていて、その底部に押圧機構１３、例え
ば、ばねが設けられている。 This extrusion pin 10 has a structure as shown in FIG. 2, for example, and has a groove 11 at the top, a groove 12 for creating a self-seal for the raw material at the middle, and a larger diameter at the bottom, with a pressing mechanism at the bottom. 13. For example, a spring is provided.
この場合、勿論、ばね１３は押出しピン１０と
別個の部品であつてもよい。 In this case, of course, the spring 13 may be a separate component from the push-out pin 10.
第３図は、上記押出しピン１０を穴９に挿入
し、上型１４を組み合わせた使用状態における第
１図Ａ−Ａ断面図で、押出しピン１０の前記自己
シール生成用溝１２にポリウレタンの自己シール
１５が装着されている。そして、押出しピン１０
の太径部にはガイドピン１７が設けられており、
押出しピン１０をガイド１６に従つて移動させる
が、回転方向への移行を規制し得る如く構成して
いる。 FIG. 3 is a sectional view taken along the line A-A in FIG. 1 in a state of use in which the extrusion pin 10 is inserted into the hole 9 and the upper mold 14 is assembled, and the self-sealing groove 12 of the extrusion pin 10 is filled with polyurethane. A seal 15 is attached. And the extrusion pin 10
A guide pin 17 is provided in the large diameter portion of the
Although the push-out pin 10 is moved according to the guide 16, it is configured to be able to restrict its movement in the rotational direction.
本考案モールドは叙上の如く構成されており、
その押出しピン１０の作動を各図に示すRIM成
形の作業手順に従つて説明すると、先ず、上下の
型１４，１６が締まるときは第４図に示すように
穴９に挿入された押出しピン１０はその頂部の平
らな面が上型１４の平坦な型表面に当接して押さ
えつけられ押出しピン１０底部のばね１３が縮
み、ピン１０はガイド１６、ガイド１７に従つて
回転することなく真直ぐに沈み、頂部の溝１１が
アフターミキサー部７、ランナー部８と一致す
る。 The mold of this invention is constructed as described above,
The operation of the ejector pin 10 will be explained according to the RIM molding work procedure shown in each figure. First, when the upper and lower molds 14 and 16 are tightened, the ejector pin 10 inserted into the hole 9 as shown in FIG. The flat surface of the top comes into contact with the flat mold surface of the upper mold 14 and is pressed down, the spring 13 at the bottom of the extrusion pin 10 contracts, and the pin 10 sinks straight without rotating according to the guides 16 and 17. , the groove 11 at the top coincides with the after mixer part 7 and the runner part 8.
そして、このような状態において、次いで第４
図のように、原料１８がアフターミキサー部７、
押出しピン１０の頂部の溝１１、ランナー部８を
通過して製品部へ注入される。 Then, in this state, the fourth
As shown in the figure, the raw material 18 is transferred to the after mixer section 7,
It passes through the groove 11 on the top of the ejector pin 10, the runner section 8, and is injected into the product section.
この際、中間の自己シール１５により原料の漏
れは防止される。 At this time, the intermediate self-seal 15 prevents leakage of the raw material.
かくして、原料硬化後、上型１４を開くと、第
５図のようにばね１３が伸び、ピン１０と共に頂
部の溝１１の中の成形物が押し出され、アフター
ミキサー部、ランナー部の脱型を容易にする。 Thus, when the upper die 14 is opened after the raw materials have hardened, the spring 13 is expanded as shown in FIG. make it easier.
第６図は、第５図のＢ−Ｂ断面図であり、上記
の状況を別の角度より示す。 FIG. 6 is a sectional view taken along line BB in FIG. 5, showing the above situation from another angle.
なお、上記実施例においては本考案のピン１０
の形状として頂部に溝を設けた例を説明したが、
第７図のように頂部が平らなピン１０Ａと針状突
起を有する上型１４Ａを使用して原料を通しても
よく、又、第８図のように頂部が平らなピン１０
Ａと、溝付の上型１４Ｂを使用してもよく、何れ
も同様の効果が期待される。 In addition, in the above embodiment, the pin 10 of the present invention is
We explained an example in which a groove was provided at the top as the shape of
As shown in FIG. 7, a pin 10A with a flat top and an upper mold 14A having a needle-like protrusion may be used to pass the raw material, or a pin 10A with a flat top as shown in FIG.
A and the grooved upper mold 14B may be used, and the same effect is expected with both.
又、第９図のように、アフターミキサーの形状
そのものの一部または全部の溝を頂部に設けたピ
ン１０Ｂを使用しても同様の効果があるが、又、
アフターミキサー部、ランナー部の形状によつて
は、複数の押出しピンを使用することもある。 Further, as shown in FIG. 9, the same effect can be obtained by using a pin 10B having a groove in the top part of a part or all of the shape of the after mixer itself.
Depending on the shape of the aftermixer section and runner section, a plurality of extrusion pins may be used.
更にピンの押出し方法も上記実施例のばね押出
しにこだわるものではなく、ゴム等の弾性体或い
は空気圧、油圧等の流体を使用してもよい。 Further, the method of pushing out the pin is not limited to the spring pushing method of the above embodiment, and an elastic body such as rubber or a fluid such as air pressure or hydraulic pressure may be used.
空気圧を使用する際は、例えば第１０図のよう
に、流体切換弁１９及び切換スイツチ２０を設
け、切換スイツチ２０で型が開いたことを感知
し、その信号をもつて切換弁１９を切換え、押出
ピン１０を押し出すようにする。 When using air pressure, a fluid switching valve 19 and a switching switch 20 are provided as shown in FIG. The push-out pin 10 is pushed out.
なお、第１０図中、２１は空気源、２２は押出
しピンまわり止めロツド、２３はゴム製Ｏリン
グ、２４は通気口である。 In FIG. 10, 21 is an air source, 22 is an extrusion pin rotation stopper rod, 23 is a rubber O-ring, and 24 is a vent hole.
（考案の効果）
本考案は以上の如くRIM成形用モールドのラ
ンナー部、アフターミキサー部の真下に穴を設
け、該穴にばねの如き押圧機構により押圧された
押出しピンを挿入したものであり、しかも押出し
ピン先端部と他方の型表面との間には両者何れか
の溝又は突起によりランナー部あるいはアフター
ミキサー部の流路の一部が形成されるので、上下
型の型締め時には押出しピンが自動的に押さえら
れてピン先端部を他方の対向する型表面との間に
形成される上記流路の一部がランナー部あるいは
アフターミキサー部の流路と連通して原料の通過
を阻害することはないが、上下型の型開き時には
ばね等の加圧によりアフターミキサー部、ランナ
ー部の成形物を自動的に押し上げ、従来、多くの
時間を要していたアフターミキサー部、ランナー
部の成形物の脱型を容易、迅速に行うことができ
る効果があり、しかも、その効果は経時的に劣化
することなく永続し、メンテナンスも容易である
利点を有し頗る斯界に寄与するところ大なる考案
である。(Effects of the invention) As described above, the present invention provides a hole directly below the runner part and after mixer part of the RIM mold, and inserts an extrusion pin pressed by a pressing mechanism such as a spring into the hole. Moreover, since a part of the flow path of the runner part or after mixer part is formed between the tip of the ejector pin and the other mold surface by a groove or protrusion on both sides, the ejector pin is closed when the upper and lower molds are clamped. A part of the flow path that is automatically pressed and formed between the pin tip and the other opposing mold surface communicates with the flow path of the runner section or the aftermixer section and obstructs the passage of the raw material. However, when opening the upper and lower molds, the molded parts of the aftermixer part and runner part are automatically pushed up by pressure from springs, etc., and the molded parts of the aftermixer part and runner part, which conventionally took a lot of time, can be pushed up. It has the effect of making it possible to easily and quickly demold the mold, and furthermore, the effect is permanent without deteriorating over time, and maintenance is easy. be.
第１図は本考案の一例に係るモールドの一部を
表す平面図、第２図は同第１図に使用する押出し
ピンの斜視図、第３図は第１図の下型と対向する
上型を組み合わせた場合のＡ−Ａ断面図、第４図
は第３図の如く型を組み合わせた後に、原料を注
入した時の状態図、第５図は第６図の状態の後、
型を分割した時の状態図、第６図は第５図のＢ−
Ｂ断面図、第７図及び第８図は本考案の変形例を
示す他の実施例であり、上下型を組み合わせた状
態で第６図と同様の方向から見た断面図、第９図
は同じく本考案の変形実施例で、押出しピン頂部
の平面図、第１０図は空気圧を利用した本考案の
更に他の変形実施例を示す断面概要図、第１１図
は既知のRIM成形用モールドの一般的形状を示
す平面図である。
６……下型、７……アフターミキサー部、８…
…ランナー部、９……穴、１０……押出しピン、
１１……押出しピン頂部の溝、１３……押圧機構
（ばね）、１４９……上型。
FIG. 1 is a plan view showing a part of a mold according to an example of the present invention, FIG. 2 is a perspective view of an extrusion pin used in FIG. 1, and FIG. 3 is an upper mold opposite to the lower mold in FIG. A-A sectional view when the molds are combined, FIG. 4 is a state diagram when raw materials are injected after the molds are combined as shown in FIG. 3, and FIG. 5 is a state diagram after the state shown in FIG. 6.
The state diagram when the mold is divided, Figure 6 is B- in Figure 5.
B cross-sectional view, FIG. 7, and FIG. 8 are other embodiments showing modifications of the present invention, and FIG. 9 is a cross-sectional view seen from the same direction as FIG. Similarly, FIG. 10 is a cross-sectional schematic diagram showing still another modified embodiment of the present invention using air pressure, and FIG. 11 is a plan view of the top of the extrusion pin in a modified embodiment of the present invention. It is a top view showing a general shape. 6...Lower mold, 7...After mixer section, 8...
...Runner part, 9...hole, 10...extrusion pin,
11... Groove at the top of the extrusion pin, 13... Pressing mechanism (spring), 149... Upper mold.
Claims (1)
一方の型面にランナー部、あるいはアフターミ
キサー部とランナー部を具えたRIM成形用モ
ールドにおいて、上記型面のランナー部あるい
はアフターミキサー部の真下に穴を設け、該穴
に底部に押圧機構を有し、その先端部で、該先
端部と、これに対向する他方の型表面との少な
くとも一方に溝又は突起を有して両者が互いに
当接したとき、他方の型表面との間にランナー
部あるいはアフターミキサー部の流路の一部を
形成する押出しピンを挿入し、上下型の型締め
の際に上記押出しピンの先端部が他方の型表面
に当接して押出しピンと他方の型表面との間に
形成される前記流路の一部とモールドのランナ
ー部あるいはアフターミキサー部の流路とが連
通する如く構成したことを特徴とするRIM成
形用モールド。 ２ 押出しピンと他方の型表面によつて形成され
る流路がピン頂部に設けられた溝によつて形成
される実用新案登録請求の範囲第１項記載の
RIM成形用モールド。 ３ 押出しピンの押圧機構がばねである実用新案
登録請求の範囲第１項又は第２項記載のRIM
成形用モールド。[Claims for Utility Model Registration] 1. In a mold for RIM forming, which has a runner part, or an after mixer part and a runner part on at least one mold surface of a mold consisting of a pair of upper and lower molds, the runner part or after mixer part on the mold surface A hole is provided directly below the mixer part, the hole has a pressing mechanism at the bottom, and the tip thereof has a groove or protrusion on at least one of the tip and the other mold surface facing thereto. When the two are in contact with each other, an ejector pin that forms part of the flow path of the runner section or aftermixer section is inserted between the other mold surface, and when the upper and lower molds are clamped, the tip of the ejector pin The mold surface is in contact with the other mold surface so that a part of the flow path formed between the extrusion pin and the other mold surface communicates with the flow path of the runner part of the mold or the aftermixer part. Characteristic RIM mold. 2. Utility model registration claim 1, wherein the flow path formed by the extrusion pin and the other mold surface is formed by a groove provided at the top of the pin.
Mold for RIM molding. 3. RIM according to claim 1 or 2, in which the pushing mechanism of the ejector pin is a spring.
Molding mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985145056U JPH0340577Y2 (en) | 1985-09-20 | 1985-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985145056U JPH0340577Y2 (en) | 1985-09-20 | 1985-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6253123U JPS6253123U (en) | 1987-04-02 |
| JPH0340577Y2 true JPH0340577Y2 (en) | 1991-08-27 |
Family
ID=31056239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985145056U Expired JPH0340577Y2 (en) | 1985-09-20 | 1985-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0340577Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6504373B2 (en) * | 2017-04-06 | 2019-04-24 | 株式会社清和モールド | Air valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5769027A (en) * | 1980-10-16 | 1982-04-27 | Hitachi Ltd | Method of controlling removing time from mold in rim molding and apparatus therefor |
-
1985
- 1985-09-20 JP JP1985145056U patent/JPH0340577Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5769027A (en) * | 1980-10-16 | 1982-04-27 | Hitachi Ltd | Method of controlling removing time from mold in rim molding and apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6253123U (en) | 1987-04-02 |
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