JPH045295Y2 - - Google Patents
Info
- Publication number
- JPH045295Y2 JPH045295Y2 JP14833586U JP14833586U JPH045295Y2 JP H045295 Y2 JPH045295 Y2 JP H045295Y2 JP 14833586 U JP14833586 U JP 14833586U JP 14833586 U JP14833586 U JP 14833586U JP H045295 Y2 JPH045295 Y2 JP H045295Y2
- Authority
- JP
- Japan
- Prior art keywords
- supply
- liquid pigment
- supply port
- pressure
- 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.)
- Expired
Links
- 239000000049 pigment Substances 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 33
- 239000011347 resin Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は射出成形機における液体顔料の供給
機構の改良に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement of a liquid pigment supply mechanism in an injection molding machine.
（従来の技術）
従来の射出成形機における液体顔料の供給機構
としては、原料樹脂ホツパー前方の加熱筒に常時
開口の供給口を設けただけのものが一般的であ
る。この場合の液体顔料の供給は、加熱筒内には
スクリユーの回転に伴つて樹脂の送込圧が発生し
ているために、液体顔料の供給圧力をポンプによ
つて当該樹脂の送込圧より高くして圧送してい
る。(Prior Art) As a liquid pigment supply mechanism in a conventional injection molding machine, it is common to simply provide a constantly open supply port in a heating cylinder in front of a raw resin hopper. In this case, the liquid pigment is supplied by using a pump to lower the liquid pigment supply pressure to the resin supply pressure, since the resin supply pressure is generated in the heating cylinder as the screw rotates. It is pumped at high pressure.
（考案が解決しようとする問題点）
しかるに、上記従来機構では、液体顔料供給時
には該液体顔料の樹脂の送込圧より高い圧力で圧
送されているため問題ないが、供給中断時にはポ
ンプが停止しているために溶融した樹脂が常時開
口の液体顔料供給口より逆流し、固化し、以降の
樹脂供給が不能になることがしばしばあつた。殊
に液体顔料を点滴によつて間欠的に供給する場合
には、供給中断が繰り返されるため、この顔料供
給口がつまつて顔料樹脂の着色が効果的にできな
いという問題があつた。(Problem to be solved by the invention) However, with the above conventional mechanism, there is no problem because the liquid pigment is pumped at a pressure higher than the feeding pressure of the resin when the liquid pigment is supplied, but when the supply is interrupted, the pump stops. Because of this, the molten resin often flowed back from the liquid pigment supply port, which was always open, and solidified, making subsequent resin supply impossible. Particularly when a liquid pigment is intermittently supplied by drip, the supply is repeatedly interrupted, which causes the pigment supply port to become clogged, making it impossible to effectively color the pigment resin.
この考案は上述の問題点に鑑みて提案されたも
のであつて、特には、顔料供給中断時に供給部内
へ溶融樹脂が逆流しない液体顔料供給部の構造を
提供しようとするものである。 This invention has been proposed in view of the above-mentioned problems, and is particularly intended to provide a structure for a liquid pigment supply section in which molten resin does not flow back into the supply section when pigment supply is interrupted.
（問題点を解決するための手段）
上述の目的を達成するためにこの考案は、射出
成形機の加熱筒に形成された液体顔料供給部にお
いて、前記加熱筒の液体顔料供給部近傍における
樹脂の送込圧に抗して供給口を閉鎖することがで
き、かつ前記液体顔料の供給圧によつて前記供給
口を開放することができる弾発部材によつて支持
された弁部材を備えたことを特徴とする。(Means for Solving the Problems) In order to achieve the above-mentioned object, this invention has a liquid pigment supply section formed in a heating cylinder of an injection molding machine, in which resin is removed near the liquid pigment supply section of the heating cylinder. A valve member supported by a resilient member capable of closing the supply port against feeding pressure and opening the supply port by the supply pressure of the liquid pigment. It is characterized by
（実施例）
以下、この考案の実施例を説明すると、添付図
面の第１図はこの考案の一実施例である液体顔料
供給部を表わした射出成形機の要部の断面図、第
２図は液体顔料供給部の要部を示した断面図、第
３図は第２図における３−３線で切断した断面図
である。(Example) An example of this invention will be described below. FIG. 1 of the attached drawings is a cross-sectional view of the main part of an injection molding machine showing a liquid pigment supply section, which is an embodiment of this invention, and FIG. 3 is a sectional view showing essential parts of the liquid pigment supply section, and FIG. 3 is a sectional view taken along line 3--3 in FIG. 2.
第１図に図示したように、液体顔料供給部１０
は、練り込みの所期段階において原料樹脂中に混
入されることができるように加熱筒１１のホツパ
ー１２付近に形成される。原料樹脂は前記ホツパ
ー１２から送入されスクリユー１３によつてノズ
ル１４方向へ練り込まれながら、しだいにその圧
力（送込圧）が高められていく。 As illustrated in FIG.
is formed near the hopper 12 of the heating cylinder 11 so that it can be mixed into the raw resin at the desired stage of kneading. The raw resin is fed from the hopper 12 and kneaded in the direction of the nozzle 14 by the screw 13, while its pressure (feeding pressure) is gradually increased.
次に第２図および第３図について、液体顔料供
給部１０の構造を説明すると、この供給部１０
は、本体部２０、先端部３０、該先端部３０に形
成された供給口３５、弁棒４０およびばね体５０
の各部より構成される。 Next, the structure of the liquid pigment supply section 10 will be explained with reference to FIGS. 2 and 3.
The main body part 20, the tip part 30, the supply port 35 formed in the tip part 30, the valve stem 40, and the spring body 50
It consists of various parts.
本体部２０は、液体顔料のタンク（図示せず）
に連なる導管部２１ならびに前記顔料を供給口３
５へ導くための送り込みチヤンバ２２を備えてい
る。なお、図中符号２６は前記チヤンバ２２から
漏洩する顔料のための戻し管路、符号２８は本体
部２０を加熱筒１１に取付るための取付ねじ部で
ある。 The main body 20 includes a liquid pigment tank (not shown).
The conduit part 21 connected to the supply port 3 and the pigment supply port 3
5 is provided with an infeed chamber 22 for guiding to In the figure, reference numeral 26 is a return conduit for the pigment leaking from the chamber 22, and reference numeral 28 is a mounting thread for attaching the main body 20 to the heating cylinder 11.
先端部３０は、前記本体部２０の下端に固定さ
れ最下部に加熱筒１１内に開口する供給口３５を
有している。符号３７は次述する弁棒４０の弁軸
４４が摺動する摺動管部である。 The tip portion 30 is fixed to the lower end of the main body portion 20 and has a supply port 35 opening into the heating cylinder 11 at the lowest portion. Reference numeral 37 is a sliding pipe portion on which a valve shaft 44 of a valve rod 40, which will be described below, slides.
弁棒４０は、図示のように案内部４１、フラン
ジ部４２、摺動部４３、弁軸４４、弁部４５およ
びＯリング４６よりなつている。なお、弁部４５
は円錐状に形成されていてその往復動によつて供
給口３５を開閉するようになつている。 The valve rod 40 is made up of a guide portion 41, a flange portion 42, a sliding portion 43, a valve shaft 44, a valve portion 45, and an O-ring 46 as shown. In addition, the valve part 45
is formed into a conical shape, and its reciprocating motion opens and closes the supply port 35.
ばね体５０は前記弁棒４０のフランジ部４２と
調節ねじ部材５５との間に配設され、前記弁棒４
０を常時前方へ付勢している。このばね体５０の
付勢力は加熱筒１１の顔料供給部近傍における樹
脂の送込圧より大きく、かつ液体顔料の供給圧よ
り小さいものでなければならない。このばね体５
０の弁棒４０に対する付勢力は、前記調節ねじ部
材５５によつて自由に調整されることができる。 The spring body 50 is disposed between the flange portion 42 of the valve stem 40 and the adjustment screw member 55, and
0 is always biased forward. The biasing force of the spring body 50 must be greater than the resin feed pressure near the pigment supply portion of the heating cylinder 11 and smaller than the liquid pigment supply pressure. This spring body 5
The urging force on the valve stem 40 of 0 can be freely adjusted by the adjusting screw member 55.
（作動）
次に、この考案の液体顔料供給部１０の作動を
一実施例によつて説明すると、第１図に図示した
ように、この顔料供給部１０近傍には約10Kg／cm2
の樹脂圧力が発生している。そして、液体顔料の
供給時には、液体顔料は供給ポンプ（図示せず）
によつて高圧状態に加圧され、導管部２１よりチ
ヤンバ２２に送り込まれる。なお、液体顔料は供
給ポンプにより200Kg／cm2程度の圧力まで上げる
ことができる。(Operation) Next, the operation of the liquid pigment supply section 10 of this invention will be explained using an example. As shown in FIG .
resin pressure is generated. And when feeding the liquid pigment, the liquid pigment is fed by a feeding pump (not shown).
It is pressurized to a high pressure state by the pump, and is fed into the chamber 22 through the conduit section 21. Note that the pressure of the liquid pigment can be increased to approximately 200 kg/cm 2 using a supply pump.
液体顔料は、送り込みチヤンバ２２へ圧送され
ると、その供給圧によつてばね体５０に抗して弁
棒４０を押し上げ、先端部の供給口３５を開放し
て、加熱筒１１内に流入する。 When the liquid pigment is fed under pressure to the feeding chamber 22, the supply pressure pushes up the valve rod 40 against the spring body 50, opens the supply port 35 at the tip, and flows into the heating cylinder 11. .
一方、液体顔料の供給中断時には、供給ポンプ
が停止するが、ばね体５０の付勢力により弁棒４
０は加熱筒１１内の供給口３５近傍における樹脂
の送込圧に抗して下がり、弁部４５が供給口３５
を閉鎖する。これにより前記供給口３５から加熱
筒１１内の溶融樹脂が逆流して該供給口３５を塞
ぐことは完全に防ぐことができる。 On the other hand, when the supply of liquid pigment is interrupted, the supply pump stops, but due to the biasing force of the spring body 50, the valve stem 4
0 decreases against the resin feeding pressure near the supply port 35 in the heating cylinder 11, and the valve portion 45 closes to the supply port 35.
will be closed. This completely prevents the molten resin in the heating cylinder 11 from flowing backward from the supply port 35 and blocking the supply port 35.
なお、供給部１０の加熱筒１１への配設位置、
加工内容等により該供給部１０近傍での樹脂の送
込圧がある程度変化するが、調節ねじ部材５５に
よつてばね体５０の付勢力の大きさを適宜調節す
ればよい。 In addition, the arrangement position of the supply unit 10 in the heating cylinder 11,
Although the feeding pressure of the resin near the supply section 10 changes to some extent depending on the processing details, etc., the magnitude of the biasing force of the spring body 50 may be adjusted as appropriate using the adjusting screw member 55.
（効果）
以上図示説明したようにこの考案では、射出成
形機の加熱筒に接続された液体顔料供給部におい
て、前記加熱筒の液体顔料供給部近傍における樹
脂の送込圧に抗して供給口を閉鎖することがで
き、かつ前記液体顔料の供給圧によつて前記供給
口を開放することができる弾発部材によつて支持
された弁部材を備えたことにより、従来の液体顔
料供給部における樹脂逆流ならびに固化という問
題をことごとく解消することができるようになつ
た。(Effects) As illustrated and explained above, in this invention, in the liquid pigment supply section connected to the heating tube of the injection molding machine, the supply port is By providing a valve member supported by a resilient member capable of closing the supply port and opening the supply port by the supply pressure of the liquid pigment, the conventional liquid pigment supply section is improved. It has become possible to completely eliminate the problems of resin backflow and solidification.
この考案によれば、また、実施例で述べたよう
に、極めて単純かつ簡易な構成によることができ
るので作動が確実で故障が少なく、さらに、供給
部配設位置における樹脂の送込圧が加工内容等の
条件により変化しても、ばね体の付勢力を変化さ
せることにより簡単に対応することができる等、
実際上極めて有利なものを提供することができ
た。 According to this invention, as described in the embodiment, it is possible to use an extremely simple and simple configuration, so the operation is reliable and there are few failures. Even if the content changes depending on the conditions, it can be easily accommodated by changing the biasing force of the spring body.
We were able to provide something extremely advantageous in practice.
第１図はこの考案の一実施例である液体顔料供
給部を表わした射出成形機の要部の断面図、第２
図は液体顔料供給部の要部を示した断面図、第３
図は第２図における３−３線で切断した断面図で
ある。
１０……液体顔料供給部、２０……本体部、３
０……先端部、３５……供給口、４０……弁棒、
４５……弁部、５０……ばね体、５５……調節ね
じ部材。
Figure 1 is a cross-sectional view of the main parts of an injection molding machine showing the liquid pigment supply section, which is an embodiment of this invention;
The figure is a sectional view showing the main parts of the liquid pigment supply section.
The figure is a sectional view taken along line 3-3 in FIG. 2. 10... Liquid pigment supply section, 20... Main body section, 3
0... Tip, 35... Supply port, 40... Valve stem,
45... Valve part, 50... Spring body, 55... Adjustment screw member.
Claims (1)
部において、前記加熱筒の液体顔料供給部近傍に
おける樹脂の送込圧に抗して供給口を閉鎖するこ
とができ、かつ前記液体顔料の供給圧によつて前
記供給口を開放することができる弾発部材によつ
て支持された弁部材を備えたことを特徴とする射
出機における液体顔料の供給機構。 In a liquid pigment supply section formed in a heating tube of an injection molding machine, a supply port can be closed against the resin feeding pressure near the liquid pigment supply section of the heating tube, and the liquid pigment can be supplied. A liquid pigment supply mechanism in an injection machine, comprising a valve member supported by a resilient member capable of opening the supply port by pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14833586U JPH045295Y2 (en) | 1986-09-26 | 1986-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14833586U JPH045295Y2 (en) | 1986-09-26 | 1986-09-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6353715U JPS6353715U (en) | 1988-04-11 |
| JPH045295Y2 true JPH045295Y2 (en) | 1992-02-14 |
Family
ID=31062505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14833586U Expired JPH045295Y2 (en) | 1986-09-26 | 1986-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045295Y2 (en) |
-
1986
- 1986-09-26 JP JP14833586U patent/JPH045295Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6353715U (en) | 1988-04-11 |
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