JPH0534905Y2 - - Google Patents
Info
- Publication number
- JPH0534905Y2 JPH0534905Y2 JP1988113727U JP11372788U JPH0534905Y2 JP H0534905 Y2 JPH0534905 Y2 JP H0534905Y2 JP 1988113727 U JP1988113727 U JP 1988113727U JP 11372788 U JP11372788 U JP 11372788U JP H0534905 Y2 JPH0534905 Y2 JP H0534905Y2
- Authority
- JP
- Japan
- Prior art keywords
- material supply
- hole
- supply path
- heating cylinder
- exhaust hole
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 39
- 238000010438 heat treatment Methods 0.000 claims description 29
- 239000012778 molding material Substances 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 11
- 238000001746 injection moulding Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は加熱シリンダへ成形材料を供給する射
出成形機における材料供給装置の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a material supply device in an injection molding machine that supplies molding material to a heating cylinder.
第２図（第３図）に示すように、一般に、イン
ラインスクリユ式射出成形機における射出装置２
０は、射出シリンダ２１の前端部２１ａに対して
後端部２２ａを結合した加熱シリンダ２２を備え
る。また、加熱シリンダ２２の内部にはスクリユ
２３を備えるとともに、前記前端部２１ａの上部
には加熱シリンダ２２の内部へ成形材料を供給す
る材料供給装置３０を備える。
As shown in FIG. 2 (FIG. 3), in general, an injection device 2 in an in-line screw type injection molding machine
0 includes a heating cylinder 22 having a rear end 22a coupled to a front end 21a of an injection cylinder 21. Further, a screw 23 is provided inside the heating cylinder 22, and a material supply device 30 for supplying molding material into the inside of the heating cylinder 22 is provided at the upper part of the front end portion 21a.
従来の材料供給装置３０は加熱シリンダ２２の
内部と上方に備えたホツパー３１の下端を、鉛直
方向へ直線状に形成した材料供給路３２によつて
連通させ、これにより、ホツパー３１の収容した
成形材料を、自然落下によつて加熱シリンダ２２
内におけるスクリユ２３のフイードゾーンへ供給
できるよう構成していた。なお、図中３３は材料
供給路３２を冷却するための冷却水路を示す。 The conventional material supply device 30 communicates the inside of the heating cylinder 22 with the lower end of a hopper 31 provided above through a material supply path 32 formed in a straight line in the vertical direction. The material is transferred to the heating cylinder 22 by gravity.
The structure was such that it could be supplied to the feed zone of the screw 23 in the interior. Note that 33 in the figure indicates a cooling water channel for cooling the material supply channel 32.
ところで、一般に成形材料は吸水性を有するた
め、湿度の高い環境下に置かれた成形材料はその
表面から吸湿する。このように吸湿した成形材料
を用いて成形した場合、材料の種類によつては成
形品の外観不良（曇、銀状等）を発生したり、成
形材料が変質（加水分解）して材料特性を低下さ
せる原因となるとともに、成形材料がスクリユ２
３に付着して前方へ移送されず、計量が不安定と
なるなどの不具合を生ずる。
By the way, since molding materials generally have water absorption properties, molding materials placed in a high humidity environment absorb moisture from their surfaces. When molding is performed using a molding material that absorbs moisture in this way, depending on the type of material, the molded product may have a poor appearance (cloudy, silvery, etc.), or the molding material may change in quality (hydrolysis), causing material properties to deteriorate. This causes the molding material to deteriorate the screw 2.
3 and cannot be transferred forward, causing problems such as unstable metering.
そこで、水分を嫌う成形材料の場合には、通常
十分な予備乾燥（例えば、ポリカーボネイトは温
度110〜120℃で４時間程度）を行なつてからホツ
パー３１へ収容したり、また、計量工程における
可塑化の際に、背圧（スクリユ後退に抵抗する
力）を与えてより効率的に脱気できるように配慮
していた。 Therefore, in the case of molding materials that dislike moisture, they are usually sufficiently pre-dried (for example, polycarbonate at a temperature of 110 to 120°C for about 4 hours) before being stored in the hopper 31, or plasticized during the weighing process. At the time of conversion, consideration was given to providing back pressure (a force that resists screw retreat) to allow for more efficient degassing.
しかし、加熱シリンダ２２の内部に供給された
成形材料は、同シリンダ２２内において加熱さ
れ、かつスクリユ２３による適度の剪断作用によ
つて可塑化されつつ混練されるが、このとき巻込
まれた空気や成形材料自身から水分（水蒸気）や
揮発ガスが発生する。そして、発生した水分や揮
発ガスは加熱シリンダ２２の後方へ送られ、一部
はスクリユ２３と加熱シリンダ２２の隙間から外
部の大気中へ排出されるとともに、一部は矢印Ｈ
１のように材料供給路３２を通つてホツパー３１
内へ侵入する。この結果、ホツパー３１内に収容
されている成形材料が吸湿し、前記不具合を招い
てしまう。 However, the molding material supplied to the inside of the heating cylinder 22 is heated in the cylinder 22, and is plasticized and kneaded by the appropriate shearing action by the screw 23, but at this time, the air involved Moisture (water vapor) and volatile gases are generated from the molding material itself. The generated moisture and volatile gas are sent to the rear of the heating cylinder 22, some of which is discharged into the outside atmosphere through the gap between the screw 23 and the heating cylinder 22, and some of which is shown by arrow H.
1, the hopper 31 passes through the material supply path 32.
invade inside. As a result, the molding material contained in the hopper 31 absorbs moisture, resulting in the above-mentioned problem.
本考案はこのような従来の技術に存在する課題
を解消した射出成形機における材料供給装置の提
供を目的とするものである。 The object of the present invention is to provide a material supply device for an injection molding machine that solves the problems that exist in the conventional technology.
本考案に係る材料供給装置１は、成形材料をホ
ツパー２から材料供給路３を通して加熱シリンダ
４の内部へ供給する構成において、下端が加熱シ
リンダ４の内部に臨み、かつ上端が大気に開放さ
れる鉛直線方向の貫通孔、望ましくは上端から下
端まで同径に形成した貫通孔を設けるとともに、
貫通孔の中途位置Ｍから斜め上方に材料供給路３
の上供給路３ａを設け、貫通孔における中途位置
Ｍよりも上方を埃等の侵入防止手段を備える排気
孔５とし、かつ下方を材料供給路３の下供給路３
ｂとしたことを特徴とする。
The material supply device 1 according to the present invention is configured to supply molding material from a hopper 2 through a material supply path 3 to the inside of a heating cylinder 4, and is provided with a through hole in the vertical direction, the lower end of which faces the inside of the heating cylinder 4 and the upper end of which is open to the atmosphere, preferably a through hole formed with the same diameter from the upper end to the lower end, and
A material supply path 3 extends obliquely upward from the midpoint M of the through hole.
The upper supply path 3a is provided with an exhaust hole 5 having a means for preventing the intrusion of dust and the like above the midpoint M of the through hole, and the lower supply path 3 of the material supply path 3 is provided with an exhaust hole 5 having a means for preventing the intrusion of dust and the like below the midpoint M of the through hole.
b) is characterized in that
次に、本考案の作用を説明する。 Next, the operation of the present invention will be explained.
まず、成形材料はホツパー２から傾斜した上供
給路３ａを通つて中途位置Ｍに至り、さらに同位
置Ｍよりも下側の材料供給路（以下、下供給路３
ｂと記す）を通つて加熱シリンダ４の内部へ供給
される。 First, the molding material is fed from the hopper 2 through the inclined upper supply path 3a to the midway position M, and then fed to the material supply path below the position M (hereinafter referred to as the lower supply path 3).
The heat is supplied to the inside of the heating cylinder 4 through a duct (noted as b).
一方、加熱シリンダ４内で発生した水分（水蒸
気）や揮発ガスは鉛直方向へ上昇するため、下供
給路３ｂを通り、中途位置Ｍからは鉛直の排気孔
５を通つて外部へ排出される。この場合、排気孔
５と下供給路３ｂは同径となるため、排気は上供
給路３ａ側（ホツパー側）に侵入しにくくなり、
排気効果が高められる。また、排気孔５には埃等
の侵入防止手段を備えるため、外部から排気孔５
の内部に対する埃等の侵入が防止される。 On the other hand, the moisture (steam) and volatile gas generated within the heating cylinder 4 rise in the vertical direction, so they pass through the lower supply path 3b and are discharged from the midway position M through the vertical exhaust hole 5 to the outside. In this case, since the exhaust hole 5 and the lower supply passage 3b have the same diameter, the exhaust gas is less likely to enter the upper supply passage 3a side (hopper side).
The exhaust effect is enhanced. In addition, since the exhaust hole 5 is equipped with a means for preventing the intrusion of dust, etc., the exhaust hole 5 is
This prevents dust, etc., from entering the inside of the device.
次に、本考案に係る好適な実施例を第１図に基
づいて詳細に説明する。
Next, a preferred embodiment of the present invention will be described in detail with reference to FIG.
まず、射出装置１０は射出シリンダ１１の前端
部１１ａに対して後端部４ａを結合した加熱シリ
ンダ４を備え、また、加熱シリンダ４の内部には
スクリユ１２を備える。なお、１３は加熱シリン
ダ４を加熱するヒータ、１４は断熱板である。一
方、前記前端部１１ａの上部には本考案に係る材
料供給装置１を付設する。 First, the injection device 10 includes a heating cylinder 4 having a rear end 4a connected to a front end 11a of an injection cylinder 11, and a screw 12 inside the heating cylinder 4. Note that 13 is a heater that heats the heating cylinder 4, and 14 is a heat insulating plate. Meanwhile, the material supply device 1 according to the present invention is attached to the upper part of the front end portion 11a.
材料供給装置１は前記前端部１１ａの上部に取
付けた排気ブロツク７を備え、同ブロツク７には
鉛直方向へ直線状の排気孔５を設ける。排気孔５
の上端は大気に開放されるとともに、同孔５の下
端は射出シリンダの前端部１１ａ及び加熱シリン
ダの後端部４ａに貫通形成してなる材料供給路３
を介して加熱シリンダ４の内部に連通する。これ
により、下端が加熱シリンダ４の内部に臨み、か
つ上端が大気に開放される鉛直線方向の貫通孔が
設けられる。この場合、貫通孔の上端から下端ま
で同径に形成するとともに、排気孔５の上端には
埃等の侵入を防止するネツト等のフイルター８
（埃等の侵入防止手段）を設ける。 The material supply device 1 includes an exhaust block 7 attached to the upper part of the front end portion 11a, and the block 7 is provided with a straight exhaust hole 5 in the vertical direction. Exhaust hole 5
The upper end of the hole 5 is open to the atmosphere, and the lower end of the hole 5 is formed through the front end 11a of the injection cylinder and the rear end 4a of the heating cylinder.
It communicates with the inside of the heating cylinder 4 via. This provides a vertical through hole whose lower end faces the inside of the heating cylinder 4 and whose upper end is open to the atmosphere. In this case, the through hole is formed to have the same diameter from the upper end to the lower end, and a filter 8 such as a net is installed at the upper end of the exhaust hole 5 to prevent dust from entering.
(Measures to prevent intrusion of dust, etc.) shall be provided.
一方、排気ブロツク７には排気孔５の内面に下
端開口が臨み、かつ斜め上方へ延出した材料供給
管９を設けるとともに、材料供給管９の上端には
ホツパー２を取付ける。これによりホツパー２の
下端と排気孔５が連通する。よつて、排気孔５の
下端位置が前記中途位置Ｍとなるとともに、材料
供給管９及び排気ブロツク７の下部は上供給路３
ａを、また、排気孔５よりも下方に位置する材料
供給路は下供給路３ｂを構成する。なお、材料供
給管９は排気孔５のなるべく下側に設けることに
よつて、材料供給路３中における成形材料の吸湿
を防止できる。 On the other hand, the exhaust block 7 is provided with a material supply pipe 9 whose lower end opening faces the inner surface of the exhaust hole 5 and which extends obliquely upward, and a hopper 2 is attached to the upper end of the material supply pipe 9. This allows the lower end of the hopper 2 and the exhaust hole 5 to communicate with each other. Therefore, the lower end position of the exhaust hole 5 becomes the midway position M, and the lower part of the material supply pipe 9 and the exhaust block 7 is connected to the upper supply path 3.
In addition, the material supply path located below the exhaust hole 5 constitutes a lower supply path 3b. By providing the material supply pipe 9 as far below the exhaust hole 5 as possible, moisture absorption of the molding material in the material supply path 3 can be prevented.
このような材料供給装置１によれば、ホツパー
２内の成形材料は傾斜した上供給路３ａを通つて
中途位置Ｍに至り、さらに下供給路３ｂを通つて
加熱シリンダ４の内部におけるスクリユ１２のフ
イードゾーンに供給される（矢印Ｈ２）。一方、
加熱シリンダ４内の成形材料はスクリユの回転に
よる通路面積減少による圧縮作用とヒータ１３に
よる加熱作用によつて可塑化されるが、その際に
発生する水分や揮発ガスは下供給路３ｂを通つて
上昇し、さらに中途位置Ｍからは鉛直方向の排気
孔５を通つて、そのほとんどが外部へ排出される
（矢印Ｈ３）。なお、上供給路３ａの下端にシヤツ
ターを設け、計量工程以外は閉じておけばホツパ
ー２側への水分や揮発ガスの侵入をより完全に防
止できる。 According to such a material supply device 1, the molding material in the hopper 2 passes through the inclined upper supply path 3a to reach the midway position M, and further passes through the lower supply path 3b to the screw 12 inside the heating cylinder 4. It is fed to the feed zone (arrow H2). on the other hand,
The molding material in the heating cylinder 4 is plasticized by the compression effect due to the passage area reduction due to the rotation of the screw and the heating effect by the heater 13, but the moisture and volatile gas generated at this time are passed through the lower supply path 3b. It rises, and from the midway position M, most of it is exhausted to the outside through the vertical exhaust hole 5 (arrow H3). Incidentally, if a shutter is provided at the lower end of the upper supply path 3a and the shutter is closed except for the metering process, it is possible to more completely prevent moisture and volatile gas from entering the hopper 2 side.
以上、一実施例について詳細に説明したが、本
考案はこのような実施例に限定されるものではな
い。 Although one embodiment has been described in detail above, the present invention is not limited to this embodiment.
例えば、埃等の侵入防止手段として、排気孔５
の上部を逆Ｌ形に折曲し、先端排気口を横に向け
ることにより、埃等の侵入を防いだり、さらに水
分や揮発ガスを室外へ排出できるようにダクト等
に接続してもよい。 For example, the exhaust hole 5
By bending the upper part into an inverted L shape and directing the tip exhaust port to the side, it may be connected to a duct or the like to prevent dust from entering and to discharge moisture and volatile gas outside.
また、他の構成としては、強制的に吸気を行う
補助フアンを排気孔５内に付設してもよい。な
お、補助フアンは成形材料に付着したパウダー等
を吸引しない程度の吸気能力を選定する。 Further, as another configuration, an auxiliary fan for forcibly drawing air may be attached inside the exhaust hole 5. Note that the auxiliary fan is selected to have a suction capacity that does not suck in powder, etc. attached to the molding material.
その他、排気孔、材料供給路の構成、形状等に
おいて、本考案の要旨を逸脱しない範囲で任意に
変更できる。 In addition, the configuration, shape, etc. of the exhaust hole and the material supply path may be arbitrarily changed without departing from the gist of the present invention.
このように、本考案に係る射出成形機の材料供
給装置は、下端が加熱シリンダの内部に臨み、か
つ上端が大気に開放される鉛直線方向の貫通孔を
設けるとともに、貫通孔の中途位置から斜め上方
に材料供給路の上供給路を設け、貫通孔における
当該中途位置よりも上方を埃等の侵入防止手段を
備える排気孔とし、かつ下方を材料供給路の下供
給路としたため、次のような顕著な効果を奏す
る。
As described above, the material supply device for an injection molding machine according to the present invention is provided with a vertical through hole whose lower end faces the inside of the heating cylinder and whose upper end is open to the atmosphere, and which also has a vertical through hole whose lower end faces the inside of the heating cylinder and whose upper end is open to the atmosphere. The upper supply path of the material supply path was provided diagonally upward, the upper part of the through hole was an exhaust hole equipped with a means to prevent the intrusion of dust, etc., and the lower part was the lower supply path of the material supply path. It has such remarkable effects.
埃等の侵入防止手段により加熱シリンダの内
部への埃等の侵入を防止しつつ、鉛直線方向の
排気孔を通して、加熱シリンダから上昇する水
分や揮発ガスを外部へ効率的に排気でき、もつ
て、成形品の外観不良及び材料の変質を防止で
きるとともに、計量工程の安定化を図れる。 While the dust and other intrusion prevention means prevents dust and other intrusion into the interior of the heating cylinder, moisture and volatile gas rising from the heating cylinder can be efficiently exhausted to the outside through the vertical exhaust hole. , it is possible to prevent poor appearance of the molded product and deterioration of the material, and to stabilize the weighing process.
特に、排気孔と下供給路は、同径となるた
め、排気は上供給路側（ホツパー側）に侵入し
にくくなり、排気効果が高められる。 In particular, since the exhaust hole and the lower supply passage have the same diameter, the exhaust gas is less likely to enter the upper supply passage side (hopper side), and the exhaust effect is enhanced.
第１図：本考案に係る材料供給装置の縦断面
図、第２図：従来の技術に係る材料供給装置の縦
断面図、第３図：第２図中Ａ−Ａ線断面図。
尚図面中、１……材料供給装置、２……ホツパ
ー、３……材料供給路、３ａ……上供給路、３ｂ
……下供給路、４……加熱シリンダ、５……排気
孔、６……排気手段、Ｍ……中途位置。
FIG. 1: A longitudinal sectional view of a material supply device according to the present invention, FIG. 2: A longitudinal sectional view of a material supply device according to a conventional technique, and FIG. 3: A sectional view taken along the line A-A in FIG. In the drawings, 1...material supply device, 2...hopper, 3...material supply path, 3a...upper supply path, 3b
... Lower supply path, 4 ... Heating cylinder, 5 ... Exhaust hole, 6 ... Exhaust means, M ... Midway position.
Claims (1)
して加熱シリンダの内部へ供給する射出成形機
の材料供給装置において、下端が加熱シリンダ
の内部に臨み、かつ上端が大気に開放される鉛
直線方向の貫通孔を設けるとともに、貫通孔の
中途位置から斜め上方に材料供給路の上供給路
を設け、貫通孔における当該中途位置よりも上
方を埃等の侵入防止手段を備える排気孔とし、
かつ下方を材料供給路の下供給路としたことを
特徴とする射出成形機の材料供給装置。 〔２〕 貫通孔は上端から下端まで同径に形成す
ることを特徴とする請求項１記載の射出成形機
の材料供給装置。[Scope of Claim for Utility Model Registration] [1] In a material supply device for an injection molding machine that supplies molding material from a hopper to the inside of a heating cylinder through a material supply path, the lower end faces the inside of the heating cylinder and the upper end faces the atmosphere. In addition to providing an open vertical through hole, an upper supply path for the material supply path is provided diagonally upward from the midway point of the through hole, and a means for preventing intrusion of dust, etc. is provided above the midway point of the through hole. As an exhaust hole,
A material supply device for an injection molding machine, characterized in that the lower part of the material supply channel is a lower supply channel. [2] The material supply device for an injection molding machine according to claim 1, wherein the through hole is formed to have the same diameter from the upper end to the lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988113727U JPH0534905Y2 (en) | 1988-08-30 | 1988-08-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988113727U JPH0534905Y2 (en) | 1988-08-30 | 1988-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0234220U JPH0234220U (en) | 1990-03-05 |
| JPH0534905Y2 true JPH0534905Y2 (en) | 1993-09-03 |
Family
ID=31353821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988113727U Expired - Lifetime JPH0534905Y2 (en) | 1988-08-30 | 1988-08-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0534905Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0520512Y2 (en) * | 1989-11-07 | 1993-05-27 | ||
| JP2678982B2 (en) * | 1995-09-11 | 1997-11-19 | ファナック株式会社 | Injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422460A (en) * | 1977-07-21 | 1979-02-20 | Osaka Seiki Kousaku Kk | Method and apparatus for extruding material to plastic pressssqueezing molder |
| JPS60110411A (en) * | 1983-11-21 | 1985-06-15 | Toyo Ink Mfg Co Ltd | Automatic supply device of master batch |
-
1988
- 1988-08-30 JP JP1988113727U patent/JPH0534905Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422460A (en) * | 1977-07-21 | 1979-02-20 | Osaka Seiki Kousaku Kk | Method and apparatus for extruding material to plastic pressssqueezing molder |
| JPS60110411A (en) * | 1983-11-21 | 1985-06-15 | Toyo Ink Mfg Co Ltd | Automatic supply device of master batch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0234220U (en) | 1990-03-05 |
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