JPH0557751A - Method and mold for injection molding of synthetic resin product - Google Patents

Method and mold for injection molding of synthetic resin product

Info

Publication number
JPH0557751A
JPH0557751A JP24657991A JP24657991A JPH0557751A JP H0557751 A JPH0557751 A JP H0557751A JP 24657991 A JP24657991 A JP 24657991A JP 24657991 A JP24657991 A JP 24657991A JP H0557751 A JPH0557751 A JP H0557751A
Authority
JP
Japan
Prior art keywords
cavity
mold
raw material
gate
material resin
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
JP24657991A
Other languages
Japanese (ja)
Other versions
JPH0767718B2 (en
Inventor
Atsushi Kinoshita
篤 木下
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.)
Sunstar Inc
Original Assignee
Sunstar Inc
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 Sunstar Inc filed Critical Sunstar Inc
Priority to JP3246579A priority Critical patent/JPH0767718B2/en
Publication of JPH0557751A publication Critical patent/JPH0557751A/en
Publication of JPH0767718B2 publication Critical patent/JPH0767718B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B29C45/26—Moulds
    • 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
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part
    • 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
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To mold a thick-walled product having a glossy surface and predetermined strength without generating a getting phenomenon even in such a case that a cavity becoming molding space has a large cross section and a long dimension and a gate having a small cross section and not subjected to special processing is provided to one end part of the cavity in the longitudinal direction thereof. CONSTITUTION:When a cavity 3 is filled with a molten raw material resin, a jetting phenomenon preventing pin 10 is extended to the cavity 3 so as to be opposed to the opening end of a gate 5 so as to provide an interval and the cavity 3 is filled with the raw material resin in this state and the jetting phenomenon preventing pin 10 is retracted from the cavity 3 immediately before the cavity 3 is perfectly filled with the raw material resin after the leading end surface of the filled raw material resin impinges against the jetting phenomenon preventing pin 10 to perform molding.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、一対の固定金型と移動
金型から構成される射出成形用金型を型閉めして、その
合成樹脂成形品の成形空間となるキャビティにランナ
ー、ゲートを通じて溶融状態の原料樹脂を充填するとき
に、これがキャビティで細長い糸状になって金型壁と接
触して冷却され、後続する原料樹脂と融着しないこと、
所謂ジェッティング現象によって、成形された成形品が
表面光沢のないものであったり、所定の強度を有しない
ものになったりすることを防止できる合成樹脂成形品の
射出成形法並びにそれで用いる射出成形用金型に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention closes an injection molding die composed of a pair of a fixed die and a moving die, and inserts a runner and a gate into a cavity serving as a molding space for the synthetic resin molded article. When the raw material resin in a molten state is filled through, it becomes a long and thin thread shape in the cavity and comes into contact with the mold wall to be cooled, so that it does not fuse with the subsequent raw material resin.
Injection molding method of synthetic resin molded article capable of preventing molded article from having no surface gloss or lacking predetermined strength due to so-called jetting phenomenon and injection molding used therewith Regarding molds.

【０００２】[0002]

【従来の技術】従来、合成樹脂成形品を射出成形する場
合、一対の固定金型と移動金型から構成される射出成形
用金型を用いている。そして、図10にはこれらの一例と
して、歯ブラシ本体を成形する射出成形用金型を示して
いる。図中ａは固定金型、ｂは移動金型を示している。
そして、この移動金型ｂは固定金型ａに対して図中上方
に移動可能に構成されている。又、ｃはこれらを型閉め
したとき、その間に形成される成形品である歯ブラシ本
体の成形空間となる長尺なキャビティ、ｄ、ｅはこのキ
ャビティｃに溶融状態の原料樹脂を充填するキャビティ
ｃの長さ方向の一方の端部側に設けられたランナーとゲ
ートで、このゲートｅはキャビティｃの長さ方向の一方
の端部にのぞませて設けられている。更に、ｆは離型ピ
ンを示している。尚、この金型には、成形品である歯ブ
ラシ本体の植毛部に植毛を植込むための有底孔を成形す
る成形ピンが固定金型ａ側に設けられるが、ここでは図
示を省略している。2. Description of the Related Art Conventionally, when a synthetic resin molded product is injection-molded, an injection molding mold composed of a pair of a fixed mold and a moving mold is used. And, as an example of these, FIG. 10 shows an injection molding die for molding the toothbrush body. In the figure, a indicates a fixed mold and b indicates a movable mold.
The movable mold b is configured to be movable upward in the figure with respect to the fixed mold a. Further, c is a long cavity which becomes a molding space of the toothbrush body which is a molded product formed between them when the molds are closed, and d and e are cavities c for filling the raw material resin in a molten state into this cavity c. The runner and the gate are provided on one end side in the length direction of the gate c, and the gate e is provided so as to be seen at one end in the length direction of the cavity c. Further, f indicates a release pin. In addition, this mold is provided with a molding pin for forming a bottomed hole for implanting the bristles in the bristles of the toothbrush body, which is a molded product, on the side of the fixed mold a, but not shown here. There is.

【０００３】そして、こうした金型を図示したように型
閉めして、そのキャビティｃにランナ−ｄ、ゲ−トｅを
通じて溶融状態の原料樹脂を充填し、成形品である歯ブ
ラシ本体を成形するものである。その後、移動金型ｂを
成形品である歯ブラシ本体を固定金型ａに残して図中上
方に移動させて、金型の型開きを行い、固定金型ａに残
る成形品である歯ブラシ本体を離型ピンｆ、ｆの作動で
取出すのである。Then, the mold is closed as shown in the drawing, and the cavity c is filled with the molten raw material resin through the runner d and the gate e to mold the toothbrush body as a molded product. Is. After that, the movable mold b is moved upward in the figure while leaving the toothbrush body, which is a molded product, in the fixed mold a, and the mold is opened, so that the toothbrush body, which is a molded product and remains in the fixed mold a, is removed. It is taken out by the operation of the release pins f, f.

【０００４】[0004]

【発明が解決しようとする課題】こうした成形空間とな
るキャビティｃの長さ方向と直交する面の断面積が小さ
い場合、成形された成形品である歯ブラシ本体は表面光
沢があり、所定の強度を有するものとなる。When the cross-sectional area of the surface of the cavity c, which is the molding space, orthogonal to the longitudinal direction is small, the molded toothbrush body has a surface gloss and has a predetermined strength. Will have.

【０００５】しかし、成形空間となるキャビティｃの長
さ方向と直交する面の断面積が大きい場合、キャビティ
ｃにランナーｄ、ゲートｅを通じて溶融状態の原料樹脂
を充填したときに、これがキャビティｃで図10に示すよ
うに細長い糸状になって金型壁と接触して冷却され、後
続する原料樹脂と融着しないこと、所謂ジェッティング
現象によって、成形された成形品である歯ブラシ本体が
表面光沢のないものであったり、所定の強度を有しない
ものになったりすることがある。即ち、こうした金型で
は、厚肉の歯ブラシ本体を表面光沢があり、所定の強度
を有して成形するのは困難である。このとき、使用する
原料樹脂がゲートｅを出たときに膨張しないアクリロニ
トリルスチレン系樹脂、その他のスチレン系樹脂、ＡＢ
Ｓ系樹脂では、こうした現象が顕著である。However, if the cross-sectional area of the surface of the cavity c which is the molding space and is orthogonal to the longitudinal direction is large, when the cavity c is filled with the molten raw material resin through the runner d and the gate e, this is the cavity c. As shown in FIG. 10, the toothbrush body, which is a molded product formed by the so-called jetting phenomenon, has a glossy surface because it becomes an elongated thread and is cooled by contact with the mold wall and is not fused with the subsequent raw material resin. It may not be present or may not have a predetermined strength. That is, with such a mold, it is difficult to mold a thick-walled toothbrush main body with surface gloss and a predetermined strength. At this time, the raw material resin used does not expand when exiting the gate e, acrylonitrile styrene resin, other styrene resin, AB
Such a phenomenon is remarkable in the S-based resin.

【０００６】そして、こうした現象は、ゲートｅの断面
積を大きくしたり、ゲートｅをキャビティｃの長さ方向
に沿った側面にのぞませて設けたり、ゲートｅをそのキ
ャビティｃ側の断面積を小さくした扇形ゲート、所謂フ
ァンゲートに形成したり、ゲートｅとランナーｄの連接
部に原料樹脂の溜り部を設けることで解決できる。Such a phenomenon may be caused by increasing the cross-sectional area of the gate e, or by disposing the gate e on the side surface along the length direction of the cavity c, or by setting the gate e on the side of the cavity c. The problem can be solved by forming a fan-shaped gate having a smaller size, that is, a so-called fan gate, or by providing a pool portion of the raw material resin at the connecting portion between the gate e and the runner d.

【０００７】しかし、ゲートｅの断面積を大きくするに
は、原料樹脂の充填圧を高める必要があって、金型の大
型化につながる。又、ゲートｅをキャビティｃの長さ方
向に沿った側面にのぞませて設けるには、成形品を多数
個取りする場合、ランナーｄ、ゲートｅがキャビティｃ
間に設けられることになって、同じく金型の大型化につ
ながる。更に、ゲートｅをファンゲートに形成したり、
ゲートｅとランナーｄの連接部に原料樹脂の溜り部を形
成する場合、それらの加工が特殊なものであるから、金
型が高価になる傾向がある。However, in order to increase the cross-sectional area of the gate e, it is necessary to increase the filling pressure of the raw material resin, which leads to an increase in size of the mold. Further, in order to provide the gate e so that it can be seen on the side surface along the length direction of the cavity c, when a large number of molded products are taken, the runner d and the gate e are not
It will be installed between them, which also leads to an increase in the size of the mold. Furthermore, the gate e is formed as a fan gate,
When forming a pool of raw material resin at the connecting portion between the gate e and the runner d, the processing tends to be expensive because of the special processing.

【０００８】ところで、ハンドル部の端部に掛け穴を有
する歯ブラシ本体の成形を行う場合、固定金型ａと移動
金型ｂの間に図11に示すようにこの掛け穴を成形する成
形ピンｇを架設させている。こうした金型では、キャビ
ティｃの長さ方向と直交する面の断面積が大きい場合で
あっても、ジェッティング現象が生じない。しかし、成
形された成形品である歯ブラシ本体は掛け穴があること
から、この部分に汚れ等が付着して衛生面で問題があっ
たり、デザイン処理に制約を受けたりする。By the way, when molding a toothbrush body having a hanging hole at the end of the handle portion, a molding pin g for molding the hanging hole between the fixed mold a and the moving mold b as shown in FIG. Is installed. In such a mold, the jetting phenomenon does not occur even if the cross-sectional area of the surface orthogonal to the length direction of the cavity c is large. However, since the toothbrush body, which is a molded product, has a hanging hole, dirt or the like is attached to this portion, which causes a problem in hygiene, or restricts design processing.

【０００９】こうした従来の問題点に鑑みて、本発明者
らは図11に示すような金型を用いた場合には、ジェッテ
ィング現象が生じないことに着目して鋭意検討を繰返し
た。その結果、本発明がなされたもので、一対の固定金
型と移動金型から構成される射出成形用金型を型閉めし
たとき、両金型間に形成される合成樹脂成形品の成形空
間となるキャビティの断面積が大きく、しかも長尺で、
その長さ方向の一方の端部にこれにのぞませて断面積が
小さく、しかも特殊な加工を施していないゲ−トがラン
ナ−に連続させて設けられている場合でも、ジェッティ
ング現象が生じることなく、厚肉に成形された成形品は
表面光沢があり、所定の強度を有することを目的として
いる。In view of these problems of the prior art, the inventors of the present invention have repeatedly conducted intensive studies paying attention to the fact that a jetting phenomenon does not occur when a mold as shown in FIG. 11 is used. As a result, according to the present invention, a molding space for a synthetic resin molded product formed between two molds when an injection mold composed of a pair of fixed mold and moving mold is closed. The cavity has a large cross-sectional area and is long,
Even if a gate with a small cross-sectional area is provided at one end in the lengthwise direction and no special processing is applied to the runner, the jetting phenomenon may occur. A molded product that is molded into a thick wall without any occurrence has a surface gloss and is intended to have a predetermined strength.

【００１０】[0010]

【課題を解決するための手段】このような目的を達成す
るため、本発明の請求項１では、一対の固定金型と移動
金型から構成される射出成形用金型を型閉めして、その
合成樹脂成形品の成形空間となるキャビティにランナ
ー、ゲートを通じて溶融状態の原料樹脂を充填するに際
して、キャビティにこれにのぞんだゲートの開口端と間
隔をあけて対面するようにジェッティング現象防止ピン
を伸長させ、この状態でキャビティに原料樹脂を充填
し、充填した原料樹脂の先端面がジェッティング現象防
止ピンにあたってから、キャビティに原料樹脂が完全に
充填される直前までの間に、キャビティからジェッティ
ング現象防止ピンを後退させて成形を行う合成樹脂成形
品の射出成形法を要旨としている。又、請求項２では、
原料樹脂が、アクリロニトリルスチレン系樹脂、その他
のスチレン系樹脂、ＡＢＳ系樹脂であることを例示し
た。そして、請求項３では、こうした射出成形法を具体
化するため、一対の固定金型と移動金型から構成される
射出成形用金型を型閉めしたとき、両金型間に合成樹脂
成形品の成形空間となるキャビティが形成されるととも
に、そのキャビティに溶融状態の原料樹脂を充填するラ
ンナーとゲートをこのゲートをキャビティにのぞませて
設け、更にはキャビティにこれにのぞんだゲートの開口
端と間隔をあけて対面するジェッティング現象防止ピン
を伸退可能に設けた射出成形用金型を開示した。又、請
求項４では、キャビティが長尺で、その長さ方向の一方
の端部にのぞませてゲートが設けられたことを、又請求
項５では、ジェッティング現象防止ピンを離型ピンの作
用と兼用させたことをそれぞれ例示した。In order to achieve such an object, in claim 1 of the present invention, an injection molding die composed of a pair of a fixed die and a moving die is closed, When the raw material resin in a molten state is filled through the runner and gate into the cavity that will be the molding space for the synthetic resin molded product, a pin that prevents the jetting phenomenon so as to face the cavity with the opening end of the gate And then in this state, the raw material resin is filled into the cavity, and from the time when the tip surface of the filled raw material resin hits the jetting phenomenon prevention pin until immediately before the raw material resin is completely filled into the cavity, The gist is the injection molding method of a synthetic resin molded product, in which the pin for preventing the tinging phenomenon is retracted for molding. Also, in claim 2,
It was illustrated that the raw material resin was an acrylonitrile styrene resin, other styrene resin, or ABS resin. In order to embody such an injection molding method, in claim 3, when a mold for injection molding composed of a pair of a fixed mold and a moving mold is closed, a synthetic resin molded product is placed between both molds. A cavity for forming the molding space is formed, and a runner and a gate for filling the raw material resin in a molten state are provided in the cavity so that the gate can be seen in the cavity. And a jetting phenomenon prevention pin facing each other with a space therebetween is provided so as to be retractable. Further, in claim 4, the cavity is long, and the gate is provided so as to be seen at one end portion in the length direction thereof, and in claim 5, the jetting phenomenon prevention pin is a release pin. It is illustrated that the function is also used.

【００１１】[0011]

【作用】而して、前記したような射出成形用金型を用い
て、合成樹脂成形品を成形するには、次のようにする。
先ず、金型を型閉めして、その成形品の成形空間となる
キャビティにランナ−、ゲ−トを通じて溶融状態の原料
樹脂を充填するのに先立って、キャビティにゲ−トの開
口端と対面するようにジェッティング現象防止ピンを伸
長させる。次に、この状態でキャビティに原料樹脂を充
填する。そして、充填した原料樹脂の先端面がゲ−トの
開口端の前方にあるジェッティング現象防止ピンにあた
って、キャビティのゲ−トの開口端に直交する面全体に
横断的に広がってから、キャビティに原料樹脂が完全に
充填される直前までの間に、キャビティからジェッティ
ング現象防止ピンをその先端面がキャビティ内面とほぼ
面一になるまで後退させる。こうして、キャビティに原
料樹脂を完全に充填して成形を行う。この後、移動金型
を成形品を固定金型に残してそれと反対側に移動させ
て、金型の型開きを行う。次に、固定金型に残る成形品
を離型ピンの作動で取出すのである。The synthetic resin molded product is molded by using the injection molding mold as described above as follows.
First, the mold is closed, and before filling the molten raw material resin through the runner and the gate into the cavity, which is the molding space of the molded product, the cavity faces the open end of the gate. Extend the jetting prevention pin as you would. Next, in this state, the raw material resin is filled in the cavity. Then, when the tip surface of the filled raw material resin hits the jetting phenomenon prevention pin in front of the opening end of the gate, it spreads across the entire surface of the cavity that is orthogonal to the opening end of the gate, and then enters the cavity. Just before the raw material resin is completely filled, the jetting phenomenon prevention pin is retracted from the cavity until its tip surface is substantially flush with the cavity inner surface. Thus, the raw material resin is completely filled in the cavity and molding is performed. After that, the movable mold is moved to the opposite side of the fixed mold, leaving the molded product in the fixed mold, and the mold is opened. Next, the molded product remaining in the fixed mold is taken out by the operation of the release pin.

【００１２】[0012]

【実施例】本発明に係る合成樹脂成形品の射出成形法並
びにそれで用いる射出成形用金型の詳細を更に添付の図
面に基づき説明する。The details of an injection molding method for a synthetic resin molded article according to the present invention and an injection molding die used therefor will be described with reference to the accompanying drawings.

【００１３】従来、合成樹脂成形品を射出成形する場
合、一対の固定金型と移動金型から構成される射出成形
用金型を用いている。そして、図１にはこれらの一例と
して、歯ブラシ本体を成形する射出成形用金型を示して
いる。図中１は固定金型、２は移動金型を示している。
そして、この移動金型２は固定金型１に対して図中上方
に移動可能に構成されている。又、３はこれらを型閉め
したとき、その間に形成される成形品である歯ブラシ本
体の成形空間となる長尺なキャビティ、４、５はこのキ
ャビティ３に溶融状態の原料樹脂を充填するキャビティ
３の長さ方向の一方の端部側に設けられたランナ−とゲ
−トで、このゲ−ト５はキャビティ３の長さ方向の一方
の端部にのぞませて設けられている。更に、６は離型ピ
ン、７はこの離型ピン６の取付型板をそれぞれ示してい
る。又、８は成形品である歯ブラシ本体の植毛部に植毛
を植込むための有底口を成形する成形ピン、９はこの成
形ピン８の取付型板をそれぞれ示している。そして、こ
れら取付型板７、９は図中下方に移動可能に構成されて
いる。Conventionally, when a synthetic resin molded product is injection-molded, an injection-molding mold composed of a pair of fixed mold and moving mold is used. And, as an example of these, FIG. 1 shows an injection molding die for molding a toothbrush main body. In the figure, 1 is a fixed mold and 2 is a movable mold.
The moving mold 2 is configured to be movable upward in the figure with respect to the fixed mold 1. Reference numeral 3 denotes a long cavity which serves as a molding space for a toothbrush body, which is a molded product formed between the cavities 3 and 4 when the molds are closed. The runner and the gate are provided at one end of the cavity 3 in the longitudinal direction, and the gate 5 is provided so as to be seen at one end of the cavity 3 in the longitudinal direction. Further, 6 is a releasing pin, and 7 is a mounting die plate of the releasing pin 6, respectively. Reference numeral 8 denotes a molding pin for forming a bottomed port for implanting the hair into the hair-implanted portion of the toothbrush body, which is a molded product, and 9 denotes a mounting template for the molding pin 8. Further, these mounting mold plates 7 and 9 are configured to be movable downward in the drawing.

【００１４】そして、こうした金型を図示したように型
閉めして、そのキャビティ３にランナ−４、ゲ−ト５を
通じて溶融状態の原料樹脂を充填した場合、キャビティ
３の長さ方向と直交する面の断面積が、例えば５mm×10
mmの55mm2 以下程度の小さい場合、成形された成形品で
ある歯ブラシ本体は表面光沢があり、所定の強度を有す
るものとなる。しかし、成形空間となるキャビティ３の
長さ方向と直交する面の断面積が、これより大きい場
合、前記したように所謂ジェッティング現象によって、
成形された成形品である歯ブラシ本体が表面光沢のない
ものであったり、所定の強度を有しないものになったり
することがある。とりわけ、キャビティ３の長さ方向と
直交する面の断面積が、例えば12mm×15mmの180 mm2 以
上の場合、こうした現象はより顕著になる。又、使用す
る原料樹脂がゲ−ト５を出たときに膨張しないアクリロ
ニトリルスチレン系樹脂、その他のスチレン系樹脂、Ａ
ＢＳ系樹脂では、こうした現象が顕著である。When such a mold is closed as shown in the drawing and the cavity 3 is filled with the raw material resin in a molten state through the runner 4 and the gate 5, it is orthogonal to the length direction of the cavity 3. The cross-sectional area of the surface is, for example, 5 mm x 10
When the size is as small as 55 mm 2 or less, the toothbrush body, which is a molded product, has surface gloss and has a predetermined strength. However, when the cross-sectional area of the surface orthogonal to the longitudinal direction of the cavity 3 which is the molding space is larger than this, as described above, due to the so-called jetting phenomenon,
The molded toothbrush body, which is a molded product, may not have surface gloss or may not have a predetermined strength. Especially, when the cross-sectional area of the surface of the cavity 3 orthogonal to the longitudinal direction is, for example, 180 mm 2 of 12 mm × 15 mm or more, such a phenomenon becomes more remarkable. Further, the raw material resin used does not expand when it leaves the gate 5, acrylonitrile styrene resin, other styrene resin, A
Such a phenomenon is remarkable in the BS resin.

【００１５】そこで、本発明では、金型の大型化につな
がらず、しかも特殊な加工を施す必要のない断面積の小
さな、例えば内径が２〜３mm程度のゲ−ト５をそのまま
利用して、こうしたジェッティング現象を生じないよう
にするため、図中10として示すキャビティ３にこれにの
ぞんだゲ−ト５の開口端と間隔をあけて対面するジェッ
ティング現象防止ピン10を伸退可能に設けている。そし
て、このジェッティング現象防止ピン10は、これやこれ
と対面した移動金型２が損傷することがないようにキャ
ビティ３に最大限突出した場合であっても、その先端面
と移動金型３の間に間隔又は図示していないがわずかに
間隔があく構成にされている。尚、図中11はジェッティ
ング現象防止ピン10の取付型板を示している。又、この
ジェッティング現象防止ピン10は成形品である歯ブラシ
本体の離型時に離型ピン６の取付型板７とその取付型板
11が連動して、離型ピンの作用と兼用させることができ
るようになっている。Therefore, in the present invention, the gate 5 having a small cross-sectional area, for example, an inner diameter of about 2 to 3 mm, which does not lead to an increase in size of the die and does not require special processing, is used as it is, In order to prevent such a jetting phenomenon, a jetting phenomenon prevention pin 10 facing the open end of the gate 5 is provided in the cavity 3 shown in FIG. ing. Further, the jetting phenomenon prevention pin 10 and the movable die 3 facing the same even if they protrude to the maximum extent in the cavity 3 so as not to damage the movable die 2 and the movable die 3 facing the same. Or a slight gap (not shown). Incidentally, reference numeral 11 in the drawing denotes a mounting template of the jetting phenomenon prevention pin 10. Further, the jetting phenomenon prevention pin 10 is used for mounting the mold plate 7 for the mold release pin 6 and the mold plate for the mold release when the toothbrush body, which is a molded product, is released from the mold.
11 is interlocked and can function as the function of the release pin.

【００１６】而して、こうした射出成形用金型を用い
て、合成樹脂成形品である歯ブラシ本体を成形するに
は、図２〜図６に示すようにする。ここでは、歯ブラシ
本体の植毛部に植毛を植込むための有底口を成形する前
記成形ピン８の図示を省略している。先ず、図２に示す
ように金型を型閉めして、その成形品の成形空間となる
キャビティ３にランナ−４、ゲ−ト５を通じて溶融状態
の原料樹脂を充填するのに先立って、キャビティ３にゲ
−ト５の開口端と対面するようにジェッティング現象防
止ピン10をその取付型板11を図中一点鎖線で示すように
固定金型１と移動金型２に向けて押出すことで、伸長さ
せる。次に、この状態でキャビティ３に原料樹脂を充填
する。そして、充填した原料樹脂の先端面がゲ−ト５の
開口端の前方にあるジェッティング現象防止ピン10にあ
たって、キャビティ３のゲ−ト５の開口端に直交する面
全体に横断的に広がったわずかに後において、図３に示
すようにキャビティ３からジェッティング現象防止ピン
10を取付型板11を作動させることで、その先端面がキャ
ビティ３内面とほぼ面一になるまで後退させる。このジ
ェッティング現象防止ピン10の後退のタイミングは、必
ずしもこれに限定されず、キャビティ３に充填した原料
樹脂の先端面がジェッティング現象防止ピン10にあたっ
てから、キャビティ３に原料樹脂が完全に充填される直
前までの間なら、何時でもよい。こうして、図４に示す
ようにキャビティ３に原料樹脂を完全に充填して成形を
行う。尚、図中12は成形品である歯ブラシ本体を示して
いる。この後、図５に示すように移動金型２を成形品で
ある歯ブラシ本体12を固定金型１に残してそれと反対側
の図中上方に移動させて、金型の型開きを行う。次に、
図６に示すように固定金型１に残る成形品である歯ブラ
シ本体12を離型ピン６、６並びに離型ピンの作用と兼用
させたジェッティング現象防止ピン10をそれらの取付型
板７、11を作動させることで取出すのである。ここで、
成形ピン８の成形品である歯ブラシ本体12からの離型
は、それの取付型板９を作動させて、図４に示す成形
後、又は図５に示す移動金型２の移動前又は後に行った
り、更には取付型板９を作動させずに、図６に示す固定
金型１からの離型と同時に行うものである。In order to mold a toothbrush body, which is a synthetic resin molded product, using such an injection molding die, the steps shown in FIGS. Here, the illustration of the forming pin 8 for forming the bottomed opening for implanting the bristles in the bristling part of the toothbrush body is omitted. First, as shown in FIG. 2, the mold is closed, and the cavity 3 serving as a molding space for the molded product is filled with the molten raw material resin through the runner 4 and the gate 5 before the cavity is filled. 3. Push out the jetting phenomenon prevention pin 10 so as to face the opening end of the gate 5 toward the fixed mold 1 and the movable mold 2 with the mounting mold plate 11 thereof as shown by the chain line in the figure. To extend. Next, in this state, the cavity 3 is filled with the raw material resin. Then, the tip end surface of the filled raw material resin hits the jetting phenomenon prevention pin 10 in front of the opening end of the gate 5, and spreads across the entire surface of the cavity 3 orthogonal to the opening end of the gate 5. Slightly afterward, as shown in FIG.
By actuating the mounting template 11 to move the tip 10 back until its tip surface is substantially flush with the inner surface of the cavity 3. The timing of the retreat of the jetting phenomenon prevention pin 10 is not necessarily limited to this, and the cavity 3 is completely filled with the raw material resin after the tip surface of the raw material resin filled in the cavity 3 hits the jetting phenomenon prevention pin 10. It can be any time until just before. In this way, as shown in FIG. 4, the cavity 3 is completely filled with the raw material resin and molding is performed. Incidentally, reference numeral 12 in the figure denotes a toothbrush body which is a molded product. After that, as shown in FIG. 5, the movable mold 2 is moved upward in the drawing on the opposite side of the fixed mold 1 with the toothbrush main body 12 which is a molded product left, and the mold is opened. next,
As shown in FIG. 6, the toothbrush body 12 which is a molded product remaining in the fixed mold 1 is used as the release pins 6 and 6 and the jetting phenomenon prevention pin 10 that also functions as the release pin. It is taken out by activating 11. here,
Molding of the molding pin 8 from the toothbrush main body 12 which is a molded product is performed after the molding shown in FIG. 4 or before or after the movement of the movable mold 2 shown in FIG. Alternatively, it is performed at the same time as the mold release from the fixed mold 1 shown in FIG. 6 without operating the mounting mold plate 9.

【００１７】このキャビティ３にゲ−ト５を通じて原料
樹脂の充填当初には、図７（イ）（ロ）に示すようにゲ
−ト５から原料樹脂が塊状になって押出されてくる。そ
して、ゲ−ト５の開口端の前方にはジェッティング現象
防止ピン10があるから、ここまで進んだ原料樹脂の先端
は図８（イ）（ロ）に示すようにこれの両側と金型壁並
びにこれの先端面と金型壁の間に分岐される。この状態
又はこれより原料樹脂の先端面が更に進んだ状態で、図
９（イ）（ロ）に示すようにジェッティング現象防止ピ
ン10をキャビティ３から後退させると、後続する原料樹
脂はこのジェッティング現象防止ピン10の抜けた後の先
行する原料樹脂の金型壁と接触して冷却された周囲より
高温状態の内部に進入して、これらと一体化して融着す
ることになる。このため、成形された成形品が表面光沢
のないものであったり、所定の強度を有しないものにな
ったりすることがないのである。At the beginning of filling the raw material resin into the cavity 3 through the gate 5, the raw material resin is extruded in a lump form from the gate 5 as shown in FIGS. Since the jetting phenomenon prevention pin 10 is located in front of the open end of the gate 5, the tip of the raw material resin that has advanced up to this point is located on both sides of this and the mold as shown in FIGS. It is branched between the wall and its tip and the mold wall. When the jetting phenomenon prevention pin 10 is retracted from the cavity 3 as shown in FIGS. 9A and 9B in this state or in a state in which the front end surface of the raw material resin is further advanced, the succeeding raw material resin is After coming out of the tinging phenomenon prevention pin 10, it comes into contact with the preceding mold wall of the raw material resin and enters the inside of a higher temperature state than the cooled surrounding, and is integrated and fused with these. For this reason, the molded product does not have a surface gloss and does not have a predetermined strength.

【００１８】このようにジェッティング現象防止のため
には、ジェッティング現象防止ピン10の外径Ａは、キャ
ビティ３の長さ方向と直交する面で、ジェッティング現
象防止ピン10の伸退方向と直交した幅Ｂに対して、ほぼ
１／４〜１／３の範囲内にあるのが好ましいと言える。
又、ジェッティング現象防止ピン10の外径Ａは、ゲ−ト
５から原料樹脂は広がって出てくるから、ゲ−ト５のジ
ェッティング現象防止ピン10の伸退方向と直交した開口
幅より大きく、例えばほぼ１〜３倍程度にすることが考
慮される。そして、図示した実施例では、ゲ−ト５とジ
ェッティング現象防止ピン10の軸心はそれぞれ直交方向
に交差しているが、これらは対面したとき、位置が多少
ずれて、ゲ−ト５の一部がジェッティング現象防止ピン
10と対面するような態様でも、本発明の目的とする効果
を達成することができる。更に、ゲ−ト５の開口端とジ
ェッティング現象防止ピン10の間隔Ｃは、この場合ほぼ
２mm〜５mm程度あけるのが好適である。そして、この間
隔Ｃは、ゲ−ト５の断面積が大きいときには長く、又そ
れが小さいときには短くすることが考慮される。As described above, in order to prevent the jetting phenomenon, the outer diameter A of the jetting phenomenon prevention pin 10 is a plane orthogonal to the length direction of the cavity 3 and the extension direction of the jetting phenomenon prevention pin 10. It can be said that it is preferable that the width B is approximately in the range of ¼ to ⅓ with respect to the orthogonal width B.
The outer diameter A of the jetting phenomenon prevention pin 10 spreads out of the gate 5 from the raw material resin, so that the opening width of the gate 5 which is orthogonal to the extending direction of the jetting phenomenon prevention pin 10 It is considered to be large, for example, about 1 to 3 times. In the illustrated embodiment, the axis of the gate 5 and the axis of the jetting phenomenon prevention pin 10 intersect each other in the orthogonal direction, but when they face each other, their positions are slightly displaced and Part of Jetting phenomenon prevention pin
Even in a mode in which it faces 10, it is possible to achieve the intended effect of the present invention. Further, the distance C between the opening end of the gate 5 and the jetting phenomenon prevention pin 10 is preferably about 2 mm to 5 mm in this case. It is considered that the distance C is long when the cross-sectional area of the gate 5 is large and short when it is small.

【００１９】次に、キャビティ３へのジェッティング現
象防止ピン10の伸長長さＤは、この伸退方向のキャビテ
ィ３の幅Ｅに対してどの程度が好適であるかを、又それ
にともなう成形品表面のピン跡の変化並びに原料樹脂の
流動挙動変化をショ−トショット法によって調べるとと
もに、ジェッティング現象防止ピン10をキャビティ３か
ら後退させるタイミングによるピン跡への影響について
も調べた。このとき、ジェッティング現象防止ピン10の
伸退方向のキャビティ３の幅Ｅを10mmにしたのに対し
て、これの伸長長さＤを４mm、６mm、８mmの三種類設定
して、実験した。この結果、ジェッティング現象防止ピ
ン10の伸長長さＤが短い程、ピン跡が美麗になり、又原
料樹脂のかなりの部分がジェッティング現象防止ピン10
の先端面と金型壁の間を通って、ここにフロ−マ−クが
現れることがわかった。逆に、ジェッティング現象防止
ピン10の伸長長さが長い程、ピン跡がわずかに残るが、
原料樹脂のかなりの部分がジェッティング現象防止ピン
10の両側と金型壁の間を通って、フロ−マ−クが現れに
くいこともわかった。こうしたことから、総合的に判断
すれば、ジェッティング現象防止ピン10の伸長長さＤは
フロ−マ−クが現れにくいという面から、長い方が好ま
しいと言える。又、キャビティ３からジェッティング現
象防止ピン10を後退させるタイミングについては、キャ
ビティ３に原料樹脂が完全に充填される直前が、ピン跡
への影響が小さくなる上で、好ましいことがわかった。Next, the extension length D of the jetting phenomenon prevention pin 10 into the cavity 3 is suitable for the width E of the cavity 3 in the extension / retraction direction, and the molded product accordingly. The change of the pin mark on the surface and the change of the flow behavior of the raw material resin were investigated by the short shot method, and the influence of the timing of retracting the jetting phenomenon prevention pin 10 from the cavity 3 on the pin mark was also examined. At this time, the width E of the cavity 3 in the retracting direction of the jetting phenomenon prevention pin 10 was set to 10 mm, while the extension length D of the cavity 3 was set to 4 mm, 6 mm, and 8 mm, and an experiment was conducted. As a result, as the extension length D of the jetting phenomenon prevention pin 10 becomes shorter, the pin mark becomes more beautiful, and a considerable part of the raw material resin becomes a jetting phenomenon prevention pin 10.
It was found that a flow mark appeared here through between the tip surface of the and the mold wall. On the contrary, as the extension length of the jetting phenomenon prevention pin 10 is longer, the pin mark slightly remains,
Jetting phenomenon prevention pin is a large part of the raw material resin
It was also found that the flow mark was less likely to appear through both sides of 10 and between the mold walls. From these facts, it can be said that, as a comprehensive judgment, it is preferable that the extension length D of the jetting phenomenon prevention pin 10 is long from the viewpoint that the flow mark is unlikely to appear. Further, it has been found that the timing for retracting the jetting phenomenon prevention pin 10 from the cavity 3 is preferably immediately before the raw material resin is completely filled in the cavity 3 in order to reduce the influence on the pin mark.

【００２０】図示した実施例にかかわらず、こうした射
出成形用金型は、歯ブラシ本体以外の各種成形品を成形
する場合に採用することができる。Regardless of the illustrated embodiment, such an injection molding die can be adopted when molding various molded products other than the toothbrush body.

【００２１】又、原料樹脂もアクリロニトリルスチレン
系樹脂、その他のスチレン系樹脂、ＡＢＳ系樹脂の他、
各種熱可塑性樹脂、各種熱硬化性樹脂も使用可能であ
る。The raw material resin is acrylonitrile styrene resin, other styrene resin, ABS resin,
Various thermoplastic resins and various thermosetting resins can also be used.

【００２２】そして、ジェッティング現象防止ピン10の
外径Ａと、キャビティ３の長さ方向と直交する面で、ジ
ェッティング現象防止ピン10の伸退方向と直交した幅
Ｂ、又ゲ−ト５の開口端とジェッティング現象防止ピン
10の間隔Ｃ、更にはキャビティ３へのジェッティング現
象防止ピン10の伸長長さＤについても、前記具体例に限
定されるものではなく、金型構造や各種部材の大きさ関
係、位置関係、使用する原料樹脂、又は他の各種条件に
応じて、実験の結果から、最適な数値を選定するのが好
ましいと言える。On the surface orthogonal to the outer diameter A of the jetting phenomenon prevention pin 10 and the length direction of the cavity 3, the width B orthogonal to the extension direction of the jetting phenomenon prevention pin 10 and the gate 5 are obtained. Opening end and Jetting phenomenon prevention pin
The interval C of 10 and the extension length D of the jetting phenomenon prevention pin 10 into the cavity 3 are not limited to the above-mentioned specific examples, and the size relationship and positional relationship between the mold structure and various members, It can be said that it is preferable to select the optimum numerical value from the result of the experiment according to the raw material resin used or other various conditions.

【００２３】[0023]

【発明の効果】以上のような本発明に係る合成樹脂成形
品の射出成形法では、一対の固定金型と移動金型から構
成される射出成形用金型を型閉めしたとき、両金型間に
形成される合成樹脂成形品の成形空間となるキャビティ
の断面積が大きく、しかも長尺で、その長さ方向の一方
の端部にこれにのぞませて断面積が小さく、しかも特殊
な加工を施していないゲ−トがランナ−に連続させて設
けられている場合でも、ジェッティング現象が生じるこ
となく、厚肉に成形された成形品は表面光沢があり、所
定の強度を有するものとなる。又、ここで用いられる射
出成形用金型は、従来の離型ピンと同態様のジェッティ
ング現象防止ピンを設けたものであるから、構成が複雑
になることもないのである。As described above, in the injection molding method for a synthetic resin molded product according to the present invention, when a mold for injection molding composed of a pair of a fixed mold and a moving mold is closed, both molds are closed. The cavity, which is the molding space for the synthetic resin molded product formed between them, has a large cross-sectional area, is long, and has a small cross-sectional area at one end in the lengthwise direction. Even if an unprocessed gate is continuously provided on the runner, a molded article formed into a thick wall has a surface gloss and has a predetermined strength without causing a jetting phenomenon. Becomes Further, since the injection molding die used here is provided with the jetting phenomenon prevention pin in the same manner as the conventional release pin, the structure does not become complicated.

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

【図１】本発明に係る射出成形用金型の一例を示す断面
説明図FIG. 1 is an explanatory sectional view showing an example of an injection molding die according to the present invention.

【図２】この射出成形用金型の成形工程を示す断面説明
図FIG. 2 is an explanatory sectional view showing a molding process of this injection molding die.

【図３】この射出成形用金型の成形工程を示す断面説明
図FIG. 3 is an explanatory sectional view showing a molding step of this injection molding die.

【図４】この射出成形用金型の成形工程を示す断面説明
図FIG. 4 is an explanatory sectional view showing a molding step of this injection molding die.

【図５】この射出成形用金型の成形工程を示す断面説明
図FIG. 5 is an explanatory sectional view showing a molding step of this injection molding die.

【図６】この射出成形用金型の成形工程を示す断面説明
図FIG. 6 is an explanatory sectional view showing a molding step of this injection molding die.

【図７】（イ）（ロ）キャビティに原料樹脂を充填した
ときの流動状態を示す説明図7A and 7B are explanatory views showing a flow state when the raw material resin is filled in the cavity.

【図８】（イ）（ロ）キャビティに原料樹脂を充填した
ときの流動状態を示す説明図8A and 8B are explanatory views showing a flow state when the raw material resin is filled in the cavity.

【図９】（イ）（ロ）キャビティに原料樹脂を充填した
ときの流動状態を示す説明図9A and 9B are explanatory views showing a flow state when a raw material resin is filled in a cavity.

【図10】従来の射出成形用金型を示す断面説明図FIG. 10 is an explanatory cross-sectional view showing a conventional injection molding die.

【図11】従来の他の射出成形用金型を示す断面説明図FIG. 11 is a cross-sectional explanatory view showing another conventional injection molding die.

【符号の説明】[Explanation of symbols]

１ 固定金型 ２ 移動金型 ３ キャビティ ４ ランナ− ５ ゲ−ト ６ 離型ピン ７ 取付型板 ８ 成形ピン ９ 取付型板 10 ジェッティング現象防止ピン 11 取付型板 12 成形品である歯ブラシ本体 1 Fixed Mold 2 Moving Mold 3 Cavity 4 Runner-5 Gate 6 Release Pin 7 Mounting Mold Plate 8 Molding Pin 9 Mounting Mold Plate 10 Jetting Phenomenon Prevention Pin 11 Mounting Mold Plate 12 Toothbrush Main Body

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 一対の固定金型と移動金型から構成され
る射出成形用金型を型閉めして、その合成樹脂成形品の
成形空間となるキャビティにランナー、ゲートを通じて
溶融状態の原料樹脂を充填するに際して、キャビティに
これにのぞんだゲートの開口端と間隔をあけて対面する
ようにジェッティング現象防止ピンを伸長させ、この状
態でキャビティに原料樹脂を充填し、充填した原料樹脂
の先端面がジェッティング現象防止ピンにあたってか
ら、キャビティに原料樹脂が完全に充填される直前まで
の間に、キャビティからジェッティング現象防止ピンを
後退させて成形を行う合成樹脂成形品の射出成形法。1. A raw material resin in a molten state through a runner and a gate in a cavity, which is a molding space of a synthetic resin molded product, by closing a mold for injection molding composed of a pair of a fixed mold and a movable mold. When filling the cavity, the jetting phenomenon prevention pin is extended so that it faces the opening end of the gate in the cavity, and the cavity is filled with the raw material resin, and the tip of the filled raw material resin is filled. An injection molding method for synthetic resin molded products, in which the jetting phenomenon prevention pin is retracted from the cavity between the time the surface hits the jetting phenomenon prevention pin and the time immediately before the cavity is completely filled with the raw material resin. 【請求項２】 原料樹脂が、アクリロニトリルスチレン
系樹脂、その他のスチレン系樹脂、ＡＢＳ系樹脂である
請求項１記載の合成樹脂成形品の射出成形法。2. The injection molding method for a synthetic resin molded article according to claim 1, wherein the raw material resin is an acrylonitrile styrene resin, other styrene resin, or ABS resin. 【請求項３】 一対の固定金型と移動金型から構成され
る射出成形用金型を型閉めしたとき、両金型間に合成樹
脂成形品の成形空間となるキャビティが形成されるとと
もに、そのキャビティに溶融状態の原料樹脂を充填する
ランナーとゲートをこのゲートをキャビティにのぞませ
て設け、更にはキャビティにこれにのぞんだゲートの開
口端と間隔をあけて対面するジェッティング現象防止ピ
ンを伸退可能に設けた射出成形用金型。3. When a mold for injection molding composed of a pair of a fixed mold and a movable mold is closed, a cavity is formed between the molds as a molding space for a synthetic resin molded product, and A jetting phenomenon prevention pin that faces the cavity with a runner and a gate that fill the molten resin in the cavity, with the gate looking into the cavity. Mold for injection molding that can be extended and retracted. 【請求項４】 キャビティが長尺で、その長さ方向の一
方の端部にのぞませてゲートが設けられた請求項３記載
の射出成形用金型。4. A mold for injection molding according to claim 3, wherein the cavity has a long length, and a gate is provided at one end in the lengthwise direction of the cavity. 【請求項５】 ジェッティング現象防止ピンを離型ピン
の作用と兼用させた請求項３又は４記載の射出成形用金
型。5. The injection-molding die according to claim 3, wherein the jetting phenomenon prevention pin also functions as a release pin.
JP3246579A 1991-08-30 1991-08-30 Injection molding method of synthetic resin molded article and injection molding die used therewith Expired - Fee Related JPH0767718B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3246579A JPH0767718B2 (en) 1991-08-30 1991-08-30 Injection molding method of synthetic resin molded article and injection molding die used therewith

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3246579A JPH0767718B2 (en) 1991-08-30 1991-08-30 Injection molding method of synthetic resin molded article and injection molding die used therewith

Publications (2)

Publication Number Publication Date
JPH0557751A true JPH0557751A (en) 1993-03-09
JPH0767718B2 JPH0767718B2 (en) 1995-07-26

Family

ID=17150521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3246579A Expired - Fee Related JPH0767718B2 (en) 1991-08-30 1991-08-30 Injection molding method of synthetic resin molded article and injection molding die used therewith

Country Status (1)

Country Link
JP (1) JPH0767718B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0721832A2 (en) * 1995-01-04 1996-07-17 M + C SCHIFFER GmbH Process for production of relatively thick-walled brush bodies, especially tooth brushes made of plastics
EP1704982A2 (en) * 2005-03-21 2006-09-27 Valplastick S.R.L. Method and mould for the production of a coat hanger and coat hanger
WO2016099256A1 (en) * 2014-12-15 2016-06-23 Besi Netherlands B.V. Mould, moulding apparatus and method for controlled overmoulding of a carrier with electronic components and moulded product

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0721832A2 (en) * 1995-01-04 1996-07-17 M + C SCHIFFER GmbH Process for production of relatively thick-walled brush bodies, especially tooth brushes made of plastics
EP0721832A3 (en) * 1995-01-04 1996-07-24 Schiffer Fa M & C
EP1704982A2 (en) * 2005-03-21 2006-09-27 Valplastick S.R.L. Method and mould for the production of a coat hanger and coat hanger
EP1704982A3 (en) * 2005-03-21 2006-11-22 Valplastick S.R.L. Method and mould for the production of a coat hanger and coat hanger
WO2016099256A1 (en) * 2014-12-15 2016-06-23 Besi Netherlands B.V. Mould, moulding apparatus and method for controlled overmoulding of a carrier with electronic components and moulded product
NL2013978B1 (en) * 2014-12-15 2016-10-11 Besi Netherlands Bv Device and method for controlled moulding and degating of a carrier with electronic components and moulded product.

Also Published As

Publication number Publication date
JPH0767718B2 (en) 1995-07-26

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