JPS5830661Y2 - RIM mold - Google Patents

RIM mold

Info

Publication number
JPS5830661Y2
JPS5830661Y2 JP9209979U JP9209979U JPS5830661Y2 JP S5830661 Y2 JPS5830661 Y2 JP S5830661Y2 JP 9209979 U JP9209979 U JP 9209979U JP 9209979 U JP9209979 U JP 9209979U JP S5830661 Y2 JPS5830661 Y2 JP S5830661Y2
Authority
JP
Japan
Prior art keywords
mold
cutting
gate runner
rim
cutting plate
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
Application number
JP9209979U
Other languages
Japanese (ja)
Other versions
JPS568425U (en
Inventor
正之 山田
修 上枝
Original Assignee
三ツ星ベルト株式会社
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 三ツ星ベルト株式会社 filed Critical 三ツ星ベルト株式会社
Priority to JP9209979U priority Critical patent/JPS5830661Y2/en
Publication of JPS568425U publication Critical patent/JPS568425U/ja
Application granted granted Critical
Publication of JPS5830661Y2 publication Critical patent/JPS5830661Y2/en
Expired legal-status Critical Current

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  • 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】 本考案は、液状熱硬化性ポリウレタンのRIM(リアク
シコン。
[Detailed description of the invention] The present invention is a liquid thermosetting polyurethane RIM (Reaxicon).

インジェクション、モールディング)形成形モールドに
係り、更に詳しくはRIM製品を製造する際、製品の意
匠並びに構造から一方の形成品は下型に残し、他方の形
成品は上型に残す必要が生じる場合に際してゲートラン
ナー成形体を切断する機構を設けたRIM用成形成形モ
ールドするものである。
Regarding molds (injection, molding), more specifically, when manufacturing RIM products, when it is necessary to leave one molded part in the lower mold and the other molded part in the upper mold due to the design and structure of the product. This is a mold for RIM equipped with a mechanism for cutting the gate runner molded body.

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低圧力下、高速度でモールドに
注入して高速反応により硬化させる方法であり、今日、
自動車用バンパー或いは自動車の内装品の成形等に幅広
く使用されている。
RIM molding is a method in which liquid materials such as polyol and polyisocyanate are injected into a mold at high speed under low pressure and cured by high-speed reaction.
It is widely used for molding automobile bumpers and automobile interior parts.

これは、RIM成形が通常の射出成形に比べて小サイク
ルの成形ができること、好きな成形品を製造し易いこと
、そして低コストである等の特長を有するためである。
This is because RIM molding has features such as being able to perform smaller cycle molding, being easier to manufacture desired molded products, and being lower cost than normal injection molding.

か\るRIM成形は液状物の注入であるために1つのモ
ールドで2つ以上の異なる成形品を得ることが可能であ
り、しかも低コストになることからして今日、各方面で
その利用が進められているが、この成形において用いら
れるRIM成形モールドが、例えば、第1図に示すよう
に下型1.上型2によって構成されており、第1のキャ
ビティ3と第2のキャビティ4が下型1と上型2の境界
部にあり、そしてゲートランナー5が上記キャビティ3
,4間を貫通していると共に、上型2に第2のキャビテ
ィ4の上方に入り込み部6が設けられている場合には、
か\るキャビティ内に液状熱硬化性ポリウレタンを注入
し硬化成形するとき、該液状物の注入、硬化後、第2図
のように型開きすると第1のキャビティ3で得られた成
形体3′は下型に残り、第2のキャビティ4で得られた
成形品4′は入り込み部6があるため上型に付着すると
い状態を現出する。
Since RIM molding involves injection of liquid, it is possible to obtain two or more different molded products with one mold, and its use is becoming more popular in various fields today due to its low cost. However, the RIM mold used in this molding is, for example, a lower mold 1. as shown in FIG. It consists of an upper mold 2, a first cavity 3 and a second cavity 4 are located at the boundary between the lower mold 1 and the upper mold 2, and a gate runner 5 is connected to the cavity 3.
, 4, and if the upper die 2 is provided with an intrusion 6 above the second cavity 4,
When a liquid thermosetting polyurethane is injected into the cavity and hardened and molded, after the liquid is injected and hardened, the mold is opened as shown in FIG. 2, and the molded body 3' obtained in the first cavity 3 is remains in the lower mold, and the molded product 4' obtained in the second cavity 4 adheres to the upper mold because of the intrusion 6.

そして、これにより、ゲートランナー5に充満していた
ゲートランナー成形体5′は引き伸ばされてゲートラン
ナー5の末端部7゜7′で切断するが、そのとき、キャ
ビティ内の成形品はその影響を受けて大きく変形する。
As a result, the gate runner molded body 5' that filled the gate runner 5 is stretched and cut at the distal end 7° 7' of the gate runner 5, but at that time, the molded product in the cavity is not affected by this. It undergoes significant deformation.

そのため、型開き後、ゲートランナー成形体を切断して
成形品に歪を与えないようにすることが行なわれている
Therefore, after opening the mold, the gate runner molded body is cut to prevent distortion from being applied to the molded product.

しかし、ゲートランナー成形体の切断方法は、型開き後
、手動式のカッターによりいちいち行なっているのが現
状であり、非常に手間を要しているのみならず、型温度
が高いために危険性を伴なっていた。
However, the current method of cutting gate runner molded bodies is to use a manual cutter after opening the mold, which is not only very time-consuming but also dangerous due to the high mold temperature. It was accompanied by

本考案は上述のような点に着目し、これを改善するもの
で、ゲートランナー成形体を容易に切断して成形品に歪
を与えず、かつ成形サイクルを短縮できるものであり、
その特徴とするところは、上型と下型を組合せ、少なく
とも2つのキャビティを有し、かつ該キャビティ間を貫
通せしめたゲートランナーを付設したポリウレタンフォ
ームのRIM成形用モールドにおいて、ゲートランナー
の途中に該ランナーの断面と同形状の貫通穴を有する2
枚の切断板を接触せしめた状態で配置し、一方の切断板
を一方の型、例えば上型に、他方の切断板を他方の型、
例えば下型に夫々嵌合固定し、上記切断板に設けた貫通
穴をゲートランナーに一致させ、かつ一方のキャビティ
には入り込み部を設けた構成にある。
The present invention focuses on the above-mentioned points and improves them by easily cutting the gate runner molded body without causing distortion to the molded product and shortening the molding cycle.
The feature is that in a polyurethane foam RIM mold that combines an upper mold and a lower mold, has at least two cavities, and is attached with a gate runner that penetrates between the cavities, there is a 2 having a through hole having the same shape as the cross section of the runner;
The two cutting plates are arranged in contact with each other, one cutting plate is attached to one die, for example, the upper die, the other cutting plate is attached to the other die, and the other cutting plate is attached to the other die.
For example, they are fitted and fixed to the lower die, the through holes provided in the cutting plate are aligned with the gate runners, and one cavity is provided with a recess.

以下、更に本考案モールドの具体的態様を添付図面に従
って詳説する。
Hereinafter, specific embodiments of the mold of the present invention will be further explained in detail with reference to the accompanying drawings.

第3図は本考案に係るRIM戒形周形用モールド例を示
す縦断面図であり、その基本構成としては前記第1図、
第2図と同様、上型2と下型1間には、第」のキャビテ
ィ3と第2のキャビティ4があり、第2のキャビティ4
には入り込み部6が存在しており、上型2に入り込んで
いる。
FIG. 3 is a longitudinal sectional view showing an example of a RIM circumferential mold according to the present invention, and its basic configuration is as shown in FIG.
As shown in FIG.
A recess 6 is present in the upper mold 2 and enters the upper mold 2.

そして、ゲートランナー5が第1のキャビティ3と第2
のキャビティ4間を貫通している。
Then, the gate runner 5 connects the first cavity 3 and the second cavity.
It penetrates between the cavities 4 of.

この場合、第1のキャビティ3と第2のキャビティ4か
ら得られる成形品が全く異なるものであり、このように
異なる2種類の成形品が得られることは前述したように
液状体を高圧、高速度で注入出来るRIM成形であるた
めである。
In this case, the molded products obtained from the first cavity 3 and the second cavity 4 are completely different, and the reason why two different types of molded products are obtained is that the liquid is heated at high pressure and high pressure. This is because RIM molding allows for high speed injection.

上記の如き構成において、本考案モールドにあっては第
4図乃至第6図にその詳細を示すようにゲートランナー
5の途中には重要な特徴をなす切断板を取付けるために
上型2と下型1に切溝8゜8′がA部拡大図より明らか
なように設けられている。
In the above structure, in the mold of the present invention, as shown in detail in FIGS. 4 to 6, the gate runner 5 has an upper mold 2 and a lower mold in order to mount a cutting plate, which is an important feature, in the middle of the gate runner 5. A cut groove 8° 8' is provided in the mold 1 as is clear from the enlarged view of part A.

第1.第2の切断板9,10は何れも長方形。1st. The second cutting plates 9 and 10 are both rectangular.

正方形状のスチール、アルミニウム等の金属性薄板であ
り、その略中央部にゲートランナー5と同形状(半円形
)の貫通穴11を有し、第1の切断板9は上型2に、又
、第2の切断板10は下型1に夫々ボルト12等によっ
て固定されている。
It is a square metal thin plate made of steel, aluminum, etc., and has a through hole 11 in the same shape (semicircular) as the gate runner 5 in its approximate center. , the second cutting plate 10 is fixed to the lower mold 1 with bolts 12, etc., respectively.

なお、第1の切断板9.第2の切断板10の固定は上型
2.下型1を反対にすることもある。
Note that the first cutting plate 9. The second cutting plate 10 is fixed by the upper mold 2. The lower mold 1 may be reversed.

第1.第2の切断板9,10の表面は接触した状態で上
、下型の切溝8,8′内に収まり液状体が切溝8,8’
及び第1.第2の切断板9,10の間隙に流れ込まない
ようにしてその後の切断をスムーズに行なうと共に、切
断板9,10に設けた貫通穴11はゲートランナー5と
一致させ、液状体を流れ易くする。
1st. The surfaces of the second cutting plates 9, 10 are in contact with each other and fit into the grooves 8, 8' of the upper and lower dies, so that the liquid is absorbed into the grooves 8, 8'.
and 1st. The liquid is prevented from flowing into the gap between the second cutting plates 9 and 10 so that the subsequent cutting is performed smoothly, and the through holes 11 provided in the cutting plates 9 and 10 are aligned with the gate runners 5 to facilitate the flow of the liquid. .

本考案モールドは叙上の如き構成からなり、次にこのよ
うな構造を有するRIM成形モールドに液状熱硬化性ポ
リウレタンを注入し硬化させるに際しては、従来と同様
であるが、注入、硬化後、第7図に示すように型開きす
るために上型2を上方向(矢印で図示)へ移動させると
、ゲートランナー5及び切溝8,8′に空隙ができ、ゲ
ートランナー5及び切断板の貫通穴11に充満している
ゲートランナー成形体は第1の切断板9と第2の切断板
10間の剪断力により第1の切断板9の左側に位置して
いる該成形体5が持ち上げられ徐々に切断していく。
The mold of the present invention has the above-mentioned structure.Next, when injecting and curing liquid thermosetting polyurethane into the RIM mold having such a structure, it is the same as conventional methods, but after injection and curing, As shown in Fig. 7, when the upper mold 2 is moved upward (indicated by the arrow) to open the mold, a gap is created in the gate runner 5 and the cut grooves 8, 8', and the gate runner 5 and cutting plate penetrate. In the gate runner molded body filling the hole 11, the molded body 5 located on the left side of the first cutting plate 9 is lifted by the shearing force between the first cutting plate 9 and the second cutting plate 10. Gradually cut it off.

これはフオーム成形体であるため容易に切断できる。Since this is a foam molded product, it can be easily cut.

なお、この場合、一方のキャビティには入り込み部が存
するため、前記切断作用時に成形体が安定して確保され
、切断作用が容易かつ確実となる。
In this case, since the recess exists in one of the cavities, the molded body is stably secured during the cutting operation, and the cutting operation becomes easy and reliable.

かくして、特別なカッターを使用することなくしかも、
キャビティ内の成形品に何ら影響を波及することなく切
断し、各成形製品とすることができる。
In this way, without using a special cutter,
It is possible to cut the molded products in the cavity into various molded products without affecting the molded products in any way.

以上のように、本考案のRIM成形モールドは、例えば
2つのキャビティから異なる成形品を製造し、型開き時
、一方の成形品を下型に、他方の成形品を上型に付着さ
せなければならない際、このキャビティ間を貫通するゲ
ートランナーに2枚の切断板を接触させた状態で夫々、
上、下型に固定させ、この切断板の剪断力によってゲー
トランナーに充満しているフオーム成形体を切断するこ
とにより、手動カッター等のカッター具を使用すること
なしに簡単な構造で切断でき、成形品には歪を与えるこ
とがないと共に、この切断機構によって成形サイクルが
短縮できる優れた特長を有するものである。
As described above, in the RIM mold of the present invention, for example, different molded products are manufactured from two cavities, and when the mold is opened, one molded product must be attached to the lower mold and the other molded product to the upper mold. When the two cutting plates are in contact with the gate runner that passes between the cavities,
By fixing it to the upper and lower molds and cutting the foam molded body filling the gate runner by the shearing force of these cutting plates, it can be cut with a simple structure without using a cutter tool such as a manual cutter. This cutting mechanism does not give any distortion to the molded product, and has the excellent feature of shortening the molding cycle.

しかも、本考案は、上記切断に際し、一方のキャビティ
には入り込み部が設けられているため、切断時、成形体
は入り込み部で係止保持され、適切な保持状態下で切断
を容易かつ確実ならしめることができる実効を有する。
Moreover, in the present invention, since one of the cavities is provided with a recess, the molded body is held in place at the recess during cutting, and cutting can be performed easily and reliably under appropriate holding conditions. It has an effective effect that can be confirmed.

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

第1図は従来のRIM成形用モールドに液状体を射出し
たときの縦断面図、第2図は第1図に示すモールドを型
開きした場合における縦断面図、第3図は本考案に係る
RIM成形用モールドに液状体を射出したときの縦断面
図、第4図は第3図におけるA部拡大図、第5図は第4
図におけるX−X断面図、第6図は第4図におけるY−
Y断面図、第7図は本考案に係るRIM成形用モールド
を型開きしたときの縦断面図である。 1・・・・・・下型、2・・・・・・上型、3・・・・
・・第1のキャビティ、4・・・・・・第2のキャビテ
ィ、5・・・・・・ゲートランナー、5・・・・・・ゲ
ートランナー成形体、6・・・・・・入り込み部、8,
8′・・・・・・切溝、9・・・・・・第1の切断板、
10・・・・・・第2の切断板、11・・・・・・切断
板の貫通穴。
Fig. 1 is a vertical cross-sectional view when liquid is injected into a conventional RIM mold, Fig. 2 is a longitudinal cross-sectional view when the mold shown in Fig. 1 is opened, and Fig. 3 is a longitudinal cross-sectional view of the mold according to the present invention. A vertical cross-sectional view when the liquid is injected into the RIM mold. Figure 4 is an enlarged view of section A in Figure 3. Figure 5 is an enlarged view of section A in Figure 3.
XX sectional view in the figure, FIG. 6 is Y--X in FIG.
The Y cross-sectional view and FIG. 7 are longitudinal cross-sectional views when the RIM mold according to the present invention is opened. 1...Lower mold, 2...Upper mold, 3...
...First cavity, 4...Second cavity, 5...Gate runner, 5...Gate runner molded body, 6...Intrusion part ,8,
8'... Cutting groove, 9... First cutting plate,
10...Second cutting plate, 11...Through hole in the cutting plate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 上型と下型を組合せ2つのキャビティを有し、かつ該キ
ャビティ間を貫通せしめたゲートランナーを付設したポ
リウレタンフォームのRIM戒形周形用モールドいて、
ゲートランナーの途中に該ランナーの断面と同形状の貫
通穴を有する2枚の切断板を接触せしめた状態で配設し
、一方の切断板を一方の型に、他方の切断板を他方の型
に夫々固定すると共に、上記の切断板に設けた貫通穴を
型閉時、ゲートランナーに一致する如くなし、かつ、一
方のキャビティには入り込み部を設けたことを特徴とす
るRIM成形用モールド。
A polyurethane foam RIM circumferential mold having two cavities by combining an upper mold and a lower mold, and a gate runner passing through between the cavities,
Two cutting plates having a through hole having the same shape as the cross section of the runner are placed in contact with each other in the middle of the gate runner, and one cutting plate is used as one mold, and the other cutting plate is used as the other mold. A mold for RIM forming, characterized in that the through holes provided in the cutting plate are aligned with the gate runners when the mold is closed, and one of the cavities is provided with a recess.
JP9209979U 1979-07-03 1979-07-03 RIM mold Expired JPS5830661Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9209979U JPS5830661Y2 (en) 1979-07-03 1979-07-03 RIM mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9209979U JPS5830661Y2 (en) 1979-07-03 1979-07-03 RIM mold

Publications (2)

Publication Number Publication Date
JPS568425U JPS568425U (en) 1981-01-24
JPS5830661Y2 true JPS5830661Y2 (en) 1983-07-06

Family

ID=29325115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9209979U Expired JPS5830661Y2 (en) 1979-07-03 1979-07-03 RIM mold

Country Status (1)

Country Link
JP (1) JPS5830661Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57144912A (en) * 1981-03-05 1982-09-07 Chikuma Kasei Kk Cultivation of maitake

Also Published As

Publication number Publication date
JPS568425U (en) 1981-01-24

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