JPS63109025A - Material pouring device for forming joint - Google Patents
Material pouring device for forming jointInfo
- Publication number
- JPS63109025A JPS63109025A JP25532486A JP25532486A JPS63109025A JP S63109025 A JPS63109025 A JP S63109025A JP 25532486 A JP25532486 A JP 25532486A JP 25532486 A JP25532486 A JP 25532486A JP S63109025 A JPS63109025 A JP S63109025A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- mold
- injection
- rubber
- rubber material
- 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
Links
- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000002347 injection Methods 0.000 claims description 59
- 239000007924 injection Substances 0.000 claims description 59
- 238000000465 moulding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 101100454194 Caenorhabditis elegans mei-1 gene Proteins 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業−１−の利用分野〉
未発明は、ゴムのウェザストリップの端部などを接続す
る際６、その端部を挿入した金型内にゴム材料を注入し
て接続部を成形する接続部成形用材料注入装置に関する
。[Detailed Description of the Invention] <Field of Application in Industry-1-> The uninvented method is to inject a rubber material into a mold into which the ends are inserted when connecting the ends of rubber weather strips, etc.6. The present invention relates to a connection part forming material injection device for forming a connection part.
〈従来の技術〉
例えば、スポンジゴム製のウェザストリップを製造する
場合、押出成形等により成形され、所定長に切断された
ウェザストリップをループ状に両端を接続する工程があ
る。<Prior Art> For example, when manufacturing a weatherstrip made of sponge rubber, there is a step of forming a weatherstrip by extrusion molding or the like, cutting it into a predetermined length, and connecting both ends of the weatherstrip in a loop shape.
このようなウェザストリップの端部を接続する工程では
、従来、竹材による加硫接続が行なわれ、ウェザストリ
ップの両端の接続部を少し間隔をおいて金型内に入れ、
さらにこの金型内に所定の大きさのゴム材料を置き、金
型を閉じた状態で加熱し、金型内に置いたゴム材料を加
熱して軟化及び発泡させた後、加硫することにより接続
部の成形と接続を行なっていた。Conventionally, in the process of connecting the ends of weatherstrips, vulcanization connections using bamboo materials have been performed, and the ends of the weatherstrips are placed in a mold with a short distance between them.
Furthermore, a rubber material of a predetermined size is placed in this mold, heated with the mold closed, and the rubber material placed in the mold is heated to soften and foam, and then is vulcanized. He was in charge of forming and connecting the joints.
〈発明が解決しようとする問題点〉
しかしながら、このようにゴム材料の竹材を金型内の接
続箇所に置き、金型を閉じて加硫する従来の装置では、
金型キャビティ内において４材としてのゴム材料が軟化
発泡するが、ゴム材料に圧力がそれほど加わらず、キャ
ビティ内の接続部空間をゴムが流動しにくいため、ウェ
ザストリップの接続部に欠けや凹みが生じたり、材料の
拡散が不均一となり均一な発泡ができないために接続部
の硬さにばらつきが生じる問題があった。<Problems to be Solved by the Invention> However, with the conventional apparatus in which bamboo material, which is a rubber material, is placed at the connection point in the mold, the mold is closed, and vulcanization is performed.
The rubber material as the fourth material softens and foams inside the mold cavity, but not much pressure is applied to the rubber material and it is difficult for the rubber to flow through the connection space in the cavity, resulting in chips and dents at the weatherstrip connection. There was a problem in that the hardness of the connection part varied because the material was not uniformly diffused and uniform foaming could not be achieved.
く問題点を解決するための手段〉
本発明は、上記の問題点を解決するためになされたもの
で、ウェザストリップ等のゴム製品の接続部を、欠けや
凹みがなく良好に成形することができる接続部成形用材
料注入装置を提供するものであり、以下のように構成さ
れる。Means for Solving the Problems> The present invention has been made to solve the above problems, and it is possible to form the joints of rubber products such as weather strips well without chips or dents. The present invention provides a material injection device for forming a connection portion, which is configured as follows.
すなわち、本発明は、ゴム製品の端部をセットした金型
のキャビティ内にゴム材料を注入して、ゴム製品の端部
を接続すると共にその接続部を成形する接続部成形用材
料注入装置であって、注入ヘッド上に設けられゴム材料
を投入するポットと、ポットにプランジャを押し込みゴ
ム材料を供給する供給シリンダと、前記注入ヘッド内に
設けられポットから供給されたゴム材料を入れる計量シ
リンダと、計にシリンダ内に嵌挿された注入プランジャ
を押し込み作動する注入シリンダと、前記注入ヘッドの
下部に取付けられ計量シリンダに通路を介して連通接続
された注入ノズルとを備えて構成したものである。That is, the present invention is a connection part forming material injection device that injects a rubber material into a cavity of a mold in which the ends of a rubber product are set, and connects the ends of the rubber product and molds the connection part. a pot provided on the injection head for introducing the rubber material; a supply cylinder for pushing a plunger into the pot and feeding the rubber material; and a measuring cylinder provided within the injection head for introducing the rubber material supplied from the pot. , an injection cylinder that is operated by pushing an injection plunger inserted into the cylinder into the meter, and an injection nozzle that is attached to the lower part of the injection head and is connected to the metering cylinder through a passage. .
このような注入装置を使用すると、計量シリンダから一
定量のゴム材料が注入ノズルを通って金型の接続部をつ
くるキャビティ内に圧力注入されるため、ゴム材料はキ
ャビティ内に均一に拡散し、欠けや凹みのない均一な硬
さをもつ接続部を成形することができる。When using such an injection device, a certain amount of rubber material is injected under pressure from the metering cylinder through the injection nozzle into the cavity that makes the connection of the mold, so that the rubber material is uniformly spread in the cavity, A connection part with uniform hardness without chips or dents can be formed.
〈実施例〉 以下、本発明の実施例を図面に基づいて説明する。<Example> Embodiments of the present invention will be described below based on the drawings.
第１図は一部断面を含む注入装置の正面図であり、この
注入装置は図示しない昇降装置に固定され、金型の上方
で全体が昇降回部である。断面で示した注入ヘッドｌの
上には、ゴム材料を入れるポット２が設けられ、注入ヘ
ッド１におけるポット２の上方に、供給シリンダ３が４
本の支持ロッド４を介して下向きに固定される。供給シ
リンダ３のピストンロッド３ａの先端にはボット２内に
嵌挿可能なプランジャ５が取付けられる。FIG. 1 is a front view of the injection device, including a partial cross section, and the injection device is fixed to an elevating device (not shown), and the entire injection device is an elevating section above the mold. Above the injection head l shown in cross section, a pot 2 for containing the rubber material is provided, and above the pot 2 on the injection head 1, a supply cylinder 3 is provided with 4
It is fixed downward via the book support rod 4. A plunger 5 that can be inserted into the bot 2 is attached to the tip of the piston rod 3a of the supply cylinder 3.
さらに、注入ヘッド１上には注入シリンダ６が２木の支
持ロッド７と取付板８を介して下向きに固定され、注入
シリンダ６のピストンロッド６ａの先端は、支持ロッド
７に上下摺動自在に支持された押下板９に固定され、注
入シリンダ６の押出し作動により押下板９は下方に押し
下げられる。Further, an injection cylinder 6 is fixed downwardly on the injection head 1 via two support rods 7 and a mounting plate 8, and the tip of the piston rod 6a of the injection cylinder 6 is slidable up and down on the support rod 7. It is fixed to a supported push-down plate 9, and the push-out operation of the injection cylinder 6 pushes the push-down plate 9 downward.
なお、ピストンロンドロａの外周にはその上昇端を規制
するためのスリーブｌＯが外嵌される。Note that a sleeve IO for regulating the rising end of the piston rod a is fitted around the outer periphery of the piston roller a.
押下板９の下方には２木の注入プランジャ１１が嵌入さ
れる２つの計量シリンダ１２が注入ヘッドエ内に設けら
れる。計量シリンダ１２の下部は通路を介して切換弁１
３の切換ボート１５に連通接続され、切換弁１３は注入
ヘッド１内に水平に配設される。すなわち、注入ヘッド
ｌ内に嵌装された切換弁１３は、切換ボート１５、給入
ボート１６、吐出ボート１７をもつ円筒状の本体とその
中に嵌挿され各ボートに接続可能な２つの切欠きを形成
した丸棒の弁体１４と、弁体１４を約９０度の範囲で回
動させる減速機付のモータ１９とから構成され、切換弁
１３の給入ボート１６は注入ヘッド内の通路を介してポ
ット２の底部に連通接続される。一方注入ヘッドｌの底
部には注入ノズル１８が２木下向きに取付けられ、注入
ノズル１８の内孔は通路を介してそれぞれ切換弁１３の
吐出ボート１７に接続される。Two metering cylinders 12 into which two injection plungers 11 are fitted are provided in the injection head below the push-down plate 9. The lower part of the metering cylinder 12 is connected to the switching valve 1 through a passage.
The switching valve 13 is horizontally disposed within the injection head 1 . That is, the switching valve 13 fitted in the injection head l has a cylindrical body having a switching boat 15, a supply boat 16, and a discharge boat 17, and two switching valves that are inserted into the cylindrical body and connectable to each boat. It is composed of a round rod valve body 14 with a notch and a motor 19 with a speed reducer that rotates the valve body 14 within a range of approximately 90 degrees. It is connected to the bottom of the pot 2 via. On the other hand, an injection nozzle 18 is attached to the bottom of the injection head 1 so as to face downward, and the inner holes of the injection nozzle 18 are respectively connected to the discharge boats 17 of the switching valve 13 through passages.
注入ノズル１８の下方には、ウェザストリップ２０の端
部を挿入するためのキャビティを有し上型と下型からな
る金￥！２１が配置され、上型上面には注入ノズル１８
の先端が当接するスプルーが設けられる。なお、この金
型２１は２本のウェザストリップ２０の端部を同時に接
続成形できるように、２つのキャビティを並設し、注入
装置にも２木の計量シリンダ１２、注入ノズル１８など
からなる２系統の注入器が設けられるが、勿論１系統の
注入装置とすることもできる。Below the injection nozzle 18, there is a cavity into which the end of the weather strip 20 is inserted, and consists of an upper mold and a lower mold. 21 is arranged, and an injection nozzle 18 is placed on the upper surface of the upper mold.
A sprue is provided with which the tip of the sprue comes into contact. The mold 21 has two cavities arranged in parallel so that the ends of two weather strips 20 can be connected and molded at the same time, and the injection device also includes two measuring cylinders 12, an injection nozzle 18, etc. Although a system of injectors is provided, it is of course possible to provide a single system of injectors.
次に、上記構成の注入装置の動作を説明する。Next, the operation of the injection device having the above configuration will be explained.
先ず、接続しようとするウェザストリップ２０の両端を
１ＯＩＩ＋１程度の間隔をあけて金型２１のキャビティ
内に入れ、ウェザストリップ２０の中空部には中子を入
れてセットし、金型２１を閉鎖する。First, put both ends of the weather strip 20 to be connected into the cavity of the mold 21 with an interval of about 1OII+1, insert a core into the hollow part of the weather strip 20, set it, and close the mold 21. .
一方、注入装置のポット２にはゴム材料が投入され、供
給プランジャ３がそのピストンロッド３ａを押し出し作
動することにより、プランジャ５をポット２内に圧入す
る。すると、ポット２内のゴム材料は注入ヘッドｌ内の
通路及び切換弁１３を通って２本の計量シリンダ１２内
に供給されていく、この時、注入シリンダ６には作動圧
が印加されず、自在にそのピストンロッド６ａを昇降さ
せ得る状態であるため、計ｌシリンダ１２内にゴム材料
が供給されるに従って、注入プランジャ１１が押し上げ
られることにより、押下板９と注入シリンダ６のピスト
ンロッド６ａも押し上げられ、スリーブｌＯによって規
制された上限位置まで上昇して停市し、これによって、
２本の計量シリンダ１２に所定量のゴム材料が供給され
る。On the other hand, a rubber material is put into the pot 2 of the injection device, and the supply plunger 3 pushes out its piston rod 3a, thereby forcing the plunger 5 into the pot 2. Then, the rubber material in the pot 2 is supplied into the two metering cylinders 12 through the passage in the injection head l and the switching valve 13. At this time, no working pressure is applied to the injection cylinder 6. Since the piston rod 6a can be raised and lowered freely, as the rubber material is supplied into the total cylinder 12, the injection plunger 11 is pushed up, and the push-down plate 9 and the piston rod 6a of the injection cylinder 6 are also moved. It is pushed up, rises to the upper limit position regulated by the sleeve IO, and stops, thereby
Two metering cylinders 12 are supplied with a predetermined amount of rubber material.
続いて、モータ１９の作動により切換弁１３の弁体１４
が約９０度回動され、計量シリンダ１２からの通路が注
入ノズル１８の逼路に接続されるように切換弁１３の切
換えが行なわれる。そして、注入装置全体が図示しない
昇降装置によって下降し、注入ノズル１８の先端が金型
２１のスプルーに占接し、この状態で注入シリンダ６が
そのピストンロッド６ａを押し出し作動する。すると、
押下板９を介して２木の注入プランジャ１１が各々の計
り、シリンダ１２内に押し込まれ、計量シリンダ１２内
のゴム材料が、切換弁１３と通路を通って注入ノズル１
８に送られ、注入ノズル１８の先端から金型２１のキャ
ビティ内に注入される。Subsequently, the valve body 14 of the switching valve 13 is activated by the operation of the motor 19.
is rotated approximately 90 degrees, and the switching valve 13 is switched in such a way that the passage from the metering cylinder 12 is connected to the outlet of the injection nozzle 18. Then, the entire injection device is lowered by a lifting device (not shown), and the tip of the injection nozzle 18 occupies the sprue of the mold 21, and in this state, the injection cylinder 6 operates to push out its piston rod 6a. Then,
Two injection plungers 11 are pushed into each metering cylinder 12 via the push-down plate 9, and the rubber material in the metering cylinder 12 passes through the switching valve 13 and the passage to the injection nozzle 1.
8 and is injected into the cavity of the mold 21 from the tip of the injection nozzle 18.
なお、この時、硬度が高く流れやすいゴム材料は、注入
ヘッドｌ内で例えば１００℃くらい（加硫しない温度）
に加熱されることにより流動可能な程度に軟化されてい
る。At this time, the rubber material with high hardness and easy flow should be kept at about 100°C (temperature at which it will not be vulcanized) in the injection head l.
It is softened to the extent that it can flow by heating.
金型２１のキャビティ内に注入されたゴム材料はこの中
で発泡すると共に例えば１８０℃程度の温度に加熱され
ることにより加硫され、ウェザストリップ２０の接続部
の成形が行なわれる。The rubber material injected into the cavity of the mold 21 is foamed therein and is heated to a temperature of, for example, about 180° C. to be vulcanized, and the connecting portion of the weather strip 20 is formed.
このように成形されたウェザストリップの接続部は、材
料を圧力注入するため、従来の４材による成形に比べ、
ゴム材料がキャビティ内で均一に拡散し、また均一な発
泡が行なわれ、欠けや凹みがなく硬さの均一な接続部を
成形することができる。The weatherstrip connections formed in this way are made by pressure-injecting the material, so compared to conventional molding using four materials,
The rubber material is uniformly diffused within the cavity, and foaming is performed uniformly, making it possible to mold a connection portion with uniform hardness without chips or dents.
〈発明の効果〉
以上説明したように、本発明の接続部成形用材料注入装
置によれば、ポットに投入したゴム材料を供給シリンダ
によって一定量だけ計量シリンダに供給し、注入シリン
ダの作動により計量シリンダ内から一定量のゴム材料を
、金型内にセットしたゴム製品の接続部間隙に注入する
ように構成した。よって、従来の４材を使用した接続部
の成形に比べ、キャビティ内にゴム材料を均一に拡散さ
れることができ、均一な発泡が行なわれるため、接続部
に欠けや凹みが生じず、均一な硬さをもつ接続部によっ
てゴム製品を接続することができる<Effects of the Invention> As explained above, according to the joint molding material injection device of the present invention, a fixed amount of rubber material put into a pot is supplied to the measuring cylinder by the supply cylinder, and the measurement is performed by the operation of the injection cylinder. A certain amount of rubber material was injected from inside the cylinder into the gap between the joints of the rubber product set in the mold. Therefore, compared to the conventional molding of the connection part using four materials, the rubber material can be uniformly diffused into the cavity and foamed uniformly, so there are no chips or dents in the connection part, and the rubber material is uniformly spread. Rubber products can be connected using a connection part with a certain degree of hardness.
図は本発明の実施例を示し、ｆｆＩＪ１図は注入装置の
一部断面を含む正面図、第２図は第１図のｎ−ＩＩ断面
図である。
ｌ・・・注入ヘッド、
２・・・ポット、
３・・・供給シリンダ、
６・・・注入シリンダ、
１１・・・注入プランジャ。
１２・・・計量シリンダ。
１６・・・注入ノズル。
特 許 出 願 人
豊田合成株式会社
′−゛−。
弁理士 飯 １）昭 夫、゛、；
：ニーム−The drawings show an embodiment of the present invention, and Fig. ffIJ1 is a front view including a partial cross section of the injection device, and Fig. 2 is a sectional view taken along the line n-II of Fig. 1. l... Injection head, 2... Pot, 3... Supply cylinder, 6... Injection cylinder, 11... Injection plunger. 12...Measuring cylinder. 16... Injection nozzle. Patent application: Toyoda Gosei Co., Ltd.'-゛-. Patent Attorney Mei 1) Akio, ゛,; : Nimes-
Claims (1)
材料を注入して、ゴム製品の端部を接続すると共にその
接続部を成形する接続部成形用材料注入装置であつて、 注入ヘッド上に設けられゴム材料を投入するポットと、
該ポットにプランジャを押し込みゴム材料を供給する供
給シリンダと、前記注入ヘッド内に設けられ該ポットか
ら供給されたゴム材料を入れる計量シリンダと、該計量
シリンダ内に嵌挿された注入プランジャを押し込み作動
する注入シリンダと、前記注入ヘッドの下部に取付けら
れ前記計量シリンダに通路を介して連通接続された注入
ノズルを備えたことを特徴とする接続部成形用材料注入
装置。[Scope of Claims] A connection part forming material injection device that injects a rubber material into the cavity of a mold in which the ends of a rubber product are set, thereby connecting the ends of the rubber product and molding the connection part. a pot provided on the injection head into which the rubber material is introduced;
A supply cylinder for supplying the rubber material by pushing a plunger into the pot, a measuring cylinder provided in the injection head and containing the rubber material supplied from the pot, and an injection plunger fitted into the measuring cylinder for operation by pushing. 1. An apparatus for injecting a material for forming a connection part, comprising: an injection cylinder for forming a joint, and an injection nozzle attached to a lower part of the injection head and connected to the metering cylinder through a passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25532486A JPS63109025A (en) | 1986-10-27 | 1986-10-27 | Material pouring device for forming joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25532486A JPS63109025A (en) | 1986-10-27 | 1986-10-27 | Material pouring device for forming joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63109025A true JPS63109025A (en) | 1988-05-13 |
| JPH0414853B2 JPH0414853B2 (en) | 1992-03-16 |
Family
ID=17277198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25532486A Granted JPS63109025A (en) | 1986-10-27 | 1986-10-27 | Material pouring device for forming joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63109025A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601917A (en) * | 2012-03-22 | 2012-07-25 | 余姚华泰橡塑机械有限公司 | Rubber preforming machine |
-
1986
- 1986-10-27 JP JP25532486A patent/JPS63109025A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601917A (en) * | 2012-03-22 | 2012-07-25 | 余姚华泰橡塑机械有限公司 | Rubber preforming machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414853B2 (en) | 1992-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0424435B1 (en) | Process for injection molding | |
| JP2510754B2 (en) | Method for injection molding a synthetic resin body filled with a fluid and apparatus for carrying out the method | |
| CA1224613A (en) | Method of making a twin-wall, internally corrugated plastic structural part with a smooth non-cellular skin and apparatus therefore | |
| US4155969A (en) | Method for injection foam molding | |
| US4555225A (en) | Apparatus for making a twin-wall, internally corrugated plastic structural part with a smooth non-cellular skin | |
| DE59604583D1 (en) | Process for the manufacture of plastic objects | |
| US3733161A (en) | Structurizer mold | |
| ATE193860T1 (en) | INJECTION MOLDING PROCESS WITH OPPOSING CUTS | |
| CA1053872A (en) | Method and device for the production of articles having a non-cellular smooth skin and a cellular core from polymer materials | |
| US20030085483A1 (en) | Apparatus and method for making molded foam articles | |
| JPS63109025A (en) | Material pouring device for forming joint | |
| JPS56129151A (en) | Molding method and apparatus for plastic material | |
| US5035846A (en) | System and process for continuous manufacture of cellular products such as latex foam mattresses, cushions or the like | |
| WO2022092618A1 (en) | Apparatus for injecting cast polyurethane | |
| CN210477573U (en) | Foaming processing system of elastic polymer using supercritical fluid as foaming agent | |
| JPH0213931B2 (en) | ||
| US3651203A (en) | Process for the manufacture of solid parts from thermo-plastic material | |
| JPS6311318A (en) | Injection apparatus | |
| JPH0473367B2 (en) | ||
| JP2002503164A (en) | Grating gate for injection molding of rubber compounds | |
| JPS591186B2 (en) | Injection molding equipment with multiple colorant supply devices | |
| JPH0310488B2 (en) | ||
| JP3640246B2 (en) | Multi-cavity molding method | |
| JP3170078B2 (en) | Synthetic resin injection equipment | |
| KR101973630B1 (en) | Resin molding manufacturing method using the resin backflow gas injection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |