JPS634924A - Screw head equipped with check valve - Google Patents
Screw head equipped with check valveInfo
- Publication number
- JPS634924A JPS634924A JP15021686A JP15021686A JPS634924A JP S634924 A JPS634924 A JP S634924A JP 15021686 A JP15021686 A JP 15021686A JP 15021686 A JP15021686 A JP 15021686A JP S634924 A JPS634924 A JP S634924A
- Authority
- JP
- Japan
- Prior art keywords
- ring valve
- screw head
- screw
- valve
- heating cylinder
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 abstract description 12
- 229920005989 resin Polymers 0.000 abstract description 12
- 238000005299 abrasion Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 1
- 210000000078 claw Anatomy 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 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
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/52—Non-return devices
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】
（産業上の利用分野）
本発明は、射出成形機等に使用するスクリュの先端に位
置する逆流防止弁付スクリュヘッドに関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a screw head with a check valve located at the tip of a screw used in an injection molding machine or the like.
（従来の技術）
射出成形機に使用するスフＩＪ−ｔｌｊ、加熱筒内に嵌
まシ込み同転させることによって、溶融した樹脂をスク
リュ先端に移送すると共に、成形型に射出する役目をも
つ本のである。このスクリュの先端にＦｉ、樹脂が射出
される時、スクリュ後方、に樹脂が逆流しないように逆
流防止弁が設けられている。逆流防止弁としては、リン
グバルブを使用するのが一般的で、その−例として第２
図および＃Ｉ５図に示すようなリングバルブ１を用りた
スクリュヘッド２がある。このスクリュヘッド２の先の
方は大径の箇所から尖頭形状に形成されておシ、大径の
箇所から基端部Ｋかけて小径になっている。その基端部
は螺子となって、中エアプレート３を介してスクリュ４
に螺子へまれ、このように連結されたスクリュヘッド２
とスクリュ４とが、加熱筒５内に嵌まシ込んでいる。ス
クリュヘッド２の大径の円周上には樹脂が通る溝状の通
路６が軸方向に等間隔で形成され、スクリュヘッド２の
尖頭部分から小径の箇所に連通させている。(Prior art) A short IJ-tlj used in an injection molding machine has the function of transferring molten resin to the tip of a screw and injecting it into a mold by fitting it into a heating cylinder and rotating it simultaneously. It is. At the tip of this screw, a backflow prevention valve is provided to prevent the resin from flowing back toward the rear of the screw when the resin is injected. As a check valve, a ring valve is generally used.
There is a screw head 2 using a ring valve 1 as shown in the figure and #I5. The tip of the screw head 2 is formed into a pointed shape starting from the large diameter portion, and becomes smaller in diameter from the large diameter portion to the base end K. Its base end becomes a screw, and the screw 4 is inserted through the middle air plate 3.
The screw head 2 is screwed into the screw head and connected in this way.
and a screw 4 are fitted into the heating cylinder 5. Groove-shaped passages 6 through which the resin passes are formed at regular intervals in the axial direction on the circumference of the large diameter of the screw head 2, and communicate from the point of the screw head 2 to the small diameter portion.
スクリュヘッド２０大径部分とウェアプレート３との間
には、第２図に示す従来のものでは、その間隔よりも小
さい幅の環状のリングバルブ１が嵌″！シ込んでいる。In the conventional type shown in FIG. 2, an annular ring valve 1 having a width smaller than the gap is fitted between the large diameter portion of the screw head 20 and the wear plate 3.
そして、このリングバルブ１の一側はスクリュヘッド２
の大径部分と小径部とがなす壁面に当接するようになっ
ており、リングバルブ１の外周面は加熱筒５内周面と摺
動でき、その内周面はスクリュヘッド２の小径の箇所と
の間に、わずかな間隙を持たせるようにかっている。こ
のようが構成によって、リングバルブ１とウェアプレー
ト３との間隔が開いて、リングバルブ１の一側がスクリ
ュヘッド２の壁面に肖ることによってスクリュ４と加熱
筒５との間にある樹脂が通路６からスクリュヘッド２前
方へ押し出されるようになっている。One side of this ring valve 1 has a screw head 2.
The outer circumferential surface of the ring valve 1 can slide on the inner circumferential surface of the heating cylinder 5, and the inner circumferential surface contacts the small diameter portion of the screw head 2. There is a slight gap between the two. Due to this configuration, the gap between the ring valve 1 and the wear plate 3 is widened, and one side of the ring valve 1 faces the wall surface of the screw head 2, so that the resin between the screw 4 and the heating cylinder 5 can pass through. 6 to the front of the screw head 2.
−方、第３図に示す従来の別の態様のものでは、リング
バルブ１の一側に溝を設けてスクリュヘッド２の箇所と
噛み合うようになっており、スクリュ４の回転と共にリ
ングバルブ１が共に回転できるようにしている。このた
め、リングツくシブ１外周と加熱筒５内周は回転可能な
ように間隙を設けている。そして、第３図では、リング
バルブ１がウェアプレート３と当接することによって、
スクリュヘッド２前部にある樹脂は通路からスクリュ４
と加熱筒５との間に逆流しないようになっている。On the other hand, in another conventional example shown in FIG. This allows them to rotate together. For this reason, a gap is provided between the outer periphery of the ring shaft 1 and the inner periphery of the heating cylinder 5 so that they can rotate. In FIG. 3, when the ring valve 1 comes into contact with the wear plate 3,
The resin at the front of screw head 2 is removed from the passage through screw 4.
It is designed to prevent backflow between the heating cylinder 5 and the heating cylinder 5.
（発明が解決しようとする問題点）
上だ従来の構成では、リングバルブ１がスクリュ４と固
定されていないことと、スクリュヘッド２の端面に溝が
設けられていることのために接触面積が減少し、第２図
に示す構造の場合、リングバルブ１のウェアプレート３
と接する側とは反対側のリングバルブ１とスクリュヘッ
ド２と接する箇所Ａｄ、接触面積が小さく、接触面圧が
高くかった時、互いに摩耗しやすくなっている。−方、
第３図に示す構造では、スクリュヘッド２とリングバル
ブ１とは噛み合った状態であるから、リングバルブ１け
スクリ：Ｌ４の回転にしたがってスクリュヘッド２と共
に回転するので、加熱筒５内周面とリングツ（ルブ１の
外周面とが摩耗しやすい。また、リングツくルブ１のス
クリュヘッド２と噛み合う箇所Ｖｉ、加熱筒５内周面と
の「カジリ」等を防止するために間隙を大きく形成しか
ければならず、それだけ射出時の逆流が多く力っている
。(Problems to be Solved by the Invention) In the above conventional configuration, the ring valve 1 is not fixed to the screw 4 and the groove is provided on the end face of the screw head 2, so the contact area is small. In the case of the structure shown in FIG. 2, the wear plate 3 of the ring valve 1
The contact area Ad of the ring valve 1 and the screw head 2 on the side opposite to the side where the ring valve 1 and the screw head 2 contact each other is small, and when the contact surface pressure is high, they are likely to wear each other. - way,
In the structure shown in FIG. 3, since the screw head 2 and the ring valve 1 are in an engaged state, the ring valve 1 rotates together with the screw head 2 according to the rotation of the screw L4, so that the inner circumferential surface of the heating cylinder 5 and The outer circumferential surface of the ring lube 1 is prone to wear. Also, a large gap is formed between the ring lube 1, the part Vi where it engages with the screw head 2, and the inner periphery of the heating cylinder 5 to prevent "galling". Therefore, the backflow at the time of injection has a lot of force.
そこで、本発明は、上記問題点を解決するため［ｆｉ−
ｉＪれたものであって、リングツくルブをスクリュヘッ
ドと係合する側と、吟エアプレートと接する側とに分割
することによって、それぞれの長所を組み合わせ長寿命
となる逆流防止前付ヌクリエヘッドを提供することを目
的とする。Therefore, in order to solve the above problems, the present invention [fi-
By dividing the ring screw into the side that engages with the screw head and the side that contacts the air plate, we combine the advantages of each to provide a backflow prevention front attachment head with a long service life. The purpose is to
（問題点を解決するための手段） 上記目的を達成するための本発明の特徴は。(Means for solving problems) The features of the present invention for achieving the above object are as follows.
加熱筒内にスクリュとスクリュヘッドとを連結して嵌挿
し、該スクリュヘッドの先端部分の大径部から小径部に
かけてスクリュと加熱筒との間に連通ずる通路を形成し
、該通路の小径部に環状のリングバルブを嵌め込んで該
通路を開閉自在にする逆止弁封のスクリュヘッドにおい
て、前記スクリュバルブを、一側が前記スクリュヘッド
に係合し、外周面が前記加熱筒内周面との間に十分な間
隙を形成した第１リングバルブと、該第１リングバルブ
の他側に当接し、外周面を前記加熱筒内周面に摺接させ
た第２リングバルブとに分割して設けたことである。A screw and a screw head are connected and fitted into a heating cylinder, a passage is formed that communicates between the screw and the heating cylinder from a large diameter part to a small diameter part at the tip of the screw head, and a small diameter part of the passage is formed. In the screw head with a check valve seal that allows the passage to be freely opened and closed by fitting an annular ring valve into the screw head, one side of the screw valve is engaged with the screw head, and an outer circumferential surface thereof is connected to the inner circumferential surface of the heating cylinder. The first ring valve is divided into a first ring valve having a sufficient gap therebetween, and a second ring valve that is in contact with the other side of the first ring valve and whose outer circumferential surface is in sliding contact with the inner circumferential surface of the heating cylinder. This is what we have set up.
（作用）
上記構成によって、樹脂がスクリュの回転によって加熱
筒とスクリュとの間から通路を通って、スクリュヘッド
の前方に注入されるときは、第１および第２リングバル
ブが移動して、第１リングバルブの一側がスクリュヘッ
ドに係合スると共に第１リングバルブの他側と第２リン
グバルブの一側とが互いに大きな接触面積によって接す
る。この時、第２リングバルブは、はとんど回転せず、
加熱筒内周面との間で摩耗することＶｉ７Ｔｈい。−方
、第１リングバルブは回転するが、加熱筒内周面との間
隙は十分取っであることから長寿命の逆流防止弁付スク
リュヘッドを実現できる。(Function) With the above configuration, when the resin is injected into the front of the screw head from between the heating cylinder and the screw through the passage due to the rotation of the screw, the first and second ring valves move, and the first and second ring valves move. One side of the first ring valve engages with the screw head, and the other side of the first ring valve and one side of the second ring valve contact each other with a large contact area. At this time, the second ring valve does not rotate at all,
There is a possibility of wear between the inner circumferential surface of the heating cylinder and the inner circumferential surface of the heating cylinder. - On the other hand, although the first ring valve rotates, there is a sufficient gap between it and the inner circumferential surface of the heating cylinder, so a long-life screw head with a check valve can be realized.
（実施例）
以下、本発明の実施例を図面に基づいて説明する。第１
図は、本濠明の逆流防止弁付スクリュヘッド７であって
、第２図と第３図をもとに従来技術の項ですでに説明し
た構成と共通の箇所を有するものである。この共通した
箇所は、同じ符号を付すことによって、その詳細な説明
は省略する。第１図に示す本発明の逆流防止弁付スクリ
ュヘッド７ｉｊ、リングバルブに特徴を有するものであ
る。スクリュヘッド２の小径箇所の通路６を含む外周部
を被っているリングバルブは、長手方向に第１リングバ
ルブ８と第２リングバルブ９とに分割されている。第１
リングバルブ８の環状の端面からは爪部１０が突設され
ている。この爪部１０ｉｔこれに対応してスクリュヘッ
ド２に形成された大径箇所で溝状の孔部１１に嵌ｔ、ｂ
込むようになっており、スクリュヘッド２がその長手中
心軸を中心に回転したとき、同じく回転するものである
。そして、爪部１０が溝状の孔部１１に嵌まシきったと
ころで各爪部１０の間の面がヌクリエヘッド２０大径部
分と小径部分がなす壁面１２に当接することによって停
止位置となっている。第１リングバルブ８の外周面と加
熱筒５内周面とは、互いに擦れ合って摩耗しないように
１５Ｗ程度の間隙８ａに維持されている。第１リングバ
ルブ８の爪部１０とけ反対側の端面は、次に述べる第２
リングバルブ９の端面と接している。第２リングバルブ
９け、同じく環状のもので、スクリュ４とは何んら連結
されてはいないので、スクリュ４が回転しても共に回転
し彦い。したがって、第１リングバルブ８がスクリュヘ
ッド２と共に回転するとき、第１リングバルブ８と第２
リングバルブ９とが互いに接し合っている各端面ｉｊ、
相対的に回転速度の差が生じ、このため皐擦を受け、摺
接し合うことによって、第２リングバルブ９は、はとん
ど回転しないようにかつている。(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1st
The figure shows a screw head 7 with a check valve made by Honhorime, which has parts common to the structure already explained in the section of the prior art based on FIGS. 2 and 3. These common parts will be designated by the same reference numerals, and detailed explanation thereof will be omitted. The screw head 7ij with a check valve and ring valve according to the present invention shown in FIG. 1 have characteristics. A ring valve covering the outer circumference of the screw head 2 including the passage 6 at the small diameter portion is divided into a first ring valve 8 and a second ring valve 9 in the longitudinal direction. 1st
A claw portion 10 is provided protruding from the annular end surface of the ring valve 8. This claw part 10it is fitted into the groove-shaped hole part 11 at a large diameter part formed on the screw head 2 correspondingly.
When the screw head 2 rotates about its longitudinal central axis, it also rotates. When the claws 10 are completely fitted into the groove-shaped holes 11, the surfaces between the claws 10 come into contact with the wall surface 12 formed by the large diameter portion and the small diameter portion of the Nucle Head 20, resulting in a stop position. There is. The outer circumferential surface of the first ring valve 8 and the inner circumferential surface of the heating cylinder 5 are maintained at a gap 8a of about 15 W to prevent them from rubbing against each other and wearing out. The end surface of the first ring valve 8 opposite to the claw portion 10 is connected to the second ring valve 8 described below.
It is in contact with the end face of the ring valve 9. The second ring valve (9) is also annular and is not connected to the screw 4 in any way, so even when the screw 4 rotates, it rotates together. Therefore, when the first ring valve 8 rotates together with the screw head 2, the first ring valve 8 and the second ring valve 8 rotate together.
Each end surface ij where the ring valve 9 is in contact with each other,
There is a relative difference in rotational speed, and as a result, the second ring valve 9 is subjected to friction and sliding contact, so that the second ring valve 9 hardly rotates.
上記の構成によって、まず、加熱筒５内周と、スクリ３
−４の外周との間にある樹脂がスクリュ４の回転によっ
てスクリュヘッド２０通路６を通ッテ、ヌクＩ） ５ヘ
ツド２の前方に注入さレルとき、第１および第２リング
バルブ８．９は、スクリュヘッド２の前方に移動し、第
１リングバルブ８の爪部１０が孔部１１の奥へ進んで停
止する一方、第２リングバルブ９端面とウェアプレート
３との間が開いて、樹脂がスクリュヘッド２の前方へ注
入される。このとき、第１リングバルブ８の端面と第２
リングバルブ９の端面とは、十分大きい接触面積で互い
に接し合っているので、面圧が従来に比べて小さく端面
の摩耗も少なく々る。また、互いに摺接し合うことから
、第２リングバルブ９Ｆｉ、＃１とんど回転するととｔ
ｉｆｉいので、第２リングバルブ９の外周面と加熱筒５
内周面とが互いに擦シ合って摩耗に到るまでの心配はな
い。また、第１リングバルブ８の外周面は、加熱筒５内
周面とは間隙８ａがあるので、回転して互いに摩擦を受
けることはなく摩耗の心配Ｆ′ｉかい。With the above configuration, first, the inner circumference of the heating cylinder 5 and the screen 3 are
-4 is injected into the front of the screw head 20 through the passage 6 of the screw head 20 by the rotation of the screw 4, and the first and second ring valves 8.9 are injected into the front of the head 2. moves forward of the screw head 2, and the claw portion 10 of the first ring valve 8 advances deep into the hole 11 and stops, while the gap between the end face of the second ring valve 9 and the wear plate 3 opens, Resin is injected into the front of the screw head 2. At this time, the end face of the first ring valve 8 and the second
Since the end surfaces of the ring valve 9 are in contact with each other with a sufficiently large contact area, the surface pressure is smaller than in the conventional case, and the wear of the end surfaces is also less. Also, since they are in sliding contact with each other, when the second ring valve 9Fi and #1 are rotated,
If the outer peripheral surface of the second ring valve 9 and the heating cylinder 5
There is no need to worry about the inner peripheral surfaces rubbing against each other and causing wear. Further, since there is a gap 8a between the outer circumferential surface of the first ring valve 8 and the inner circumferential surface of the heating cylinder 5, there is no possibility of wear due to rotation and friction between the outer circumferential surface and the inner circumferential surface of the heating cylinder 5.
スクリュヘッド２の前方に樹脂が充満して射出成形する
ときに、スクリュヘッド２が圧力を受けれときは、第１
および第２リングバルブ８゜９が移動して、第２リング
バルブ９の第１リングバルブ８とは反対側の端面がウェ
アプレート３に当接して通路６は、閉ざされる。このと
き、第１リングバルブ８の外周面は、加熱筒５内周面と
の間に適した寸法の間隙８ａが形成されていることから
、樹脂の第２リングバルブ９側への逆流を少なくできる
。When the front of the screw head 2 is filled with resin and the screw head 2 receives pressure during injection molding, the first
Then, the second ring valve 8°9 moves, and the end surface of the second ring valve 9 on the opposite side from the first ring valve 8 comes into contact with the wear plate 3, so that the passage 6 is closed. At this time, since a gap 8a of an appropriate size is formed between the outer circumferential surface of the first ring valve 8 and the inner circumferential surface of the heating cylinder 5, backflow of the resin toward the second ring valve 9 side is reduced. can.
（発明の効果）
以上述べたことから本発明の逆流防止弁付スクリュヘッ
ドでは、逆流防止弁となるリングバルブを、スクリュヘ
ッドと係合し、しかも加熱筒内周とけ適した寸法の間隙
を有する第１リングバルブと、加熱筒内周と摺動する第
２リングバルブとを互いに端面で当接させることによっ
て、従来技術が有する長所を生かし、嘲耗が少々く、ま
た逆流を少々くしたので長寿命の逆流防止弁付スクリュ
ヘッドが実現できたことで生産性の向上に役立つもので
ある。(Effects of the Invention) As described above, in the screw head with a check valve of the present invention, the ring valve serving as the check valve is engaged with the screw head, and has a gap of a size suitable for melting the inner periphery of the heating cylinder. By making the first ring valve and the second ring valve, which slides on the inner periphery of the heating cylinder, come into contact with each other at their end faces, we have taken advantage of the advantages of the prior art, reducing wear and tear and reducing backflow. The realization of a screw head with a long-life check valve will help improve productivity.
第１図は、本発明の逆止弁付スクリュヘッドを示す縦断
面図、
第２図は、従来の逆止弁付スクリュヘッドの一例を示す
縦断面図、
第３図は、従来の逆止弁付スクリュヘッドの他の例を示
す縦断面図である。
２：スクリュヘッド ４：スクリュ ５：加熱筒 ６：
通路 ７：逆流防止弁付スクリュヘッド ８：第１リン
グバルブ ８ａ ：間隙 ９：第２リングバルブFig. 1 is a longitudinal sectional view showing a screw head with a check valve according to the present invention, Fig. 2 is a longitudinal sectional view showing an example of a conventional screw head with a check valve, and Fig. 3 is a longitudinal sectional view showing an example of a conventional screw head with a check valve. It is a longitudinal cross-sectional view which shows another example of a screw head with a valve. 2: Screw head 4: Screw 5: Heating tube 6:
Passage 7: Screw head with check valve 8: First ring valve 8a: Gap 9: Second ring valve
Claims (1)
て嵌挿し、該スクリュヘッドの先端部分の大径部から小
径部にかけてスクリユと加熱筒との間に連通する通路を
形成し、該通路の小径部に環状のリングバルブを嵌め込
んで該通路を開閉自在にする逆止弁付のスクリュヘッド
において、前記リングバルブを、一側が前記スクリュヘ
ッドに係合し、外局面が前記加熱筒内周面との間に十分
な間隙を形成した第１リングバルブと、該第１リングバ
ルブの他側に当接し、外周面を前記加熱筒内周面に摺接
させた第２リングバルブとに分割して設けたことを特徴
とする逆流防止弁付スクリュヘッド。(1) A screw and a screw head are connected and fitted into a heating cylinder, and a passage communicating between the screw and the heating cylinder is formed from a large diameter part to a small diameter part of the tip of the screw head, and the passage In the screw head equipped with a check valve that allows the passage to be freely opened and closed by fitting an annular ring valve into the small diameter part of the screw head, one side of the ring valve is engaged with the screw head and the outer surface is inside the heating cylinder. A first ring valve having a sufficient gap formed between the first ring valve and the surrounding surface, and a second ring valve that is in contact with the other side of the first ring valve and whose outer peripheral surface is in sliding contact with the inner peripheral surface of the heating cylinder. A screw head with a non-return valve, which is characterized by being separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15021686A JPS634924A (en) | 1986-06-26 | 1986-06-26 | Screw head equipped with check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15021686A JPS634924A (en) | 1986-06-26 | 1986-06-26 | Screw head equipped with check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS634924A true JPS634924A (en) | 1988-01-09 |
| JPH045529B2 JPH045529B2 (en) | 1992-01-31 |
Family
ID=15492073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15021686A Granted JPS634924A (en) | 1986-06-26 | 1986-06-26 | Screw head equipped with check valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS634924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262219A (en) * | 1988-08-29 | 1990-03-02 | Fanuc Ltd | Screw head of injection molder |
| JP2021084319A (en) * | 2019-11-27 | 2021-06-03 | 株式会社豊田中央研究所 | Injection molding screw |
-
1986
- 1986-06-26 JP JP15021686A patent/JPS634924A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262219A (en) * | 1988-08-29 | 1990-03-02 | Fanuc Ltd | Screw head of injection molder |
| JP2021084319A (en) * | 2019-11-27 | 2021-06-03 | 株式会社豊田中央研究所 | Injection molding screw |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH045529B2 (en) | 1992-01-31 |
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