JPH018338Y2 - - Google Patents
Info
- Publication number
- JPH018338Y2 JPH018338Y2 JP1984046797U JP4679784U JPH018338Y2 JP H018338 Y2 JPH018338 Y2 JP H018338Y2 JP 1984046797 U JP1984046797 U JP 1984046797U JP 4679784 U JP4679784 U JP 4679784U JP H018338 Y2 JPH018338 Y2 JP H018338Y2
- Authority
- JP
- Japan
- Prior art keywords
- sectional area
- temperature
- diameter portion
- heat
- 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
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- Extrusion Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
(イ) 技術分野
本考案は、高分子可塑化材料加熱装置、特に高
分子可塑化材料を小断面積の流路を通過させるこ
とにより摩擦熱を利用して加熱する形式の加熱装
置、に関するものである。[Detailed description of the invention] (a) Technical field The present invention is a polymer plasticized material heating device, in particular, a polymer plasticized material heating device that uses frictional heat to heat the polymer plasticized material by passing it through a channel with a small cross-sectional area. The invention relates to a type of heating device.
(ロ) 従来技術
熱架橋反応を伴なう高分子可塑化材料を射出成
形する場合、効率良く成形するためには熱架橋反
応温度以下の比較的低い温度に保持していた溶融
材料を、金型キヤビイテイ内に射出する直前に熱
架橋反応温度まで加熱することが必要である。こ
のため、射出する直前に流路断面積の小さい管を
通過させることによつて溶融材料の温度を上昇さ
せるようにした高分子可塑化材料加熱装置が使用
される。特開昭57−181835号に、このような高分
子可塑化材料加熱装置の１例が示されている。こ
の高分子可塑化材料加熱装置は、射出シリンダと
ノズルとの間に薄肉鋼管から成る多数の発熱管を
有している。射出成形機の貯留室内において比較
的低い温度に保持されていた溶融材料は、流路断
面積の小さい発熱管を通過する際に大きな圧力損
失を発生するため、温度が上昇し、発熱管を通過
した後では熱架橋反応温度に達する。こうして、
昇温された後、ノズルから金型キヤビイテイ内に
送り込まれた材料は、金型キヤビイテイ内で効率
良く熱架橋反応を進行させ、所定の成形品とな
る。(b) Prior art When injection molding a polymer plasticized material that involves a thermal crosslinking reaction, in order to mold efficiently, the molten material, which has been kept at a relatively low temperature below the thermal crosslinking reaction temperature, is It is necessary to heat to the thermal crosslinking reaction temperature just before injection into the mold cavity. For this reason, a polymer plasticized material heating device is used in which the temperature of the molten material is raised by passing it through a tube with a small cross-sectional area just before injection. An example of such a heating device for polymeric plasticized material is disclosed in Japanese Patent Application Laid-Open No. 181835/1983. This polymer plasticized material heating device has a large number of heat generating tubes made of thin-walled steel pipes between an injection cylinder and a nozzle. The molten material, which was kept at a relatively low temperature in the storage chamber of the injection molding machine, generates a large pressure loss when passing through the heat generating tube with a small flow path cross section, so the temperature rises and the material is forced to pass through the heat generating tube. After that, the temperature of the thermal crosslinking reaction is reached. thus,
After being heated, the material fed into the mold cavity from the nozzle undergoes a thermal crosslinking reaction efficiently within the mold cavity, resulting in a predetermined molded product.
しかし、このような従来の高分子可塑化材料加
熱装置では、発熱管の流路断面積は入口側から出
口側まで一定であつたため、発熱管各部における
発熱量を一定にすることができないという問題点
があつた。すなわち、発熱管の入口側では、十分
な熱量が加えられていないためまだ温度が低く材
料の粘度が高い状態で小断面積の発熱管を通過す
ることとなるため、圧力損失が非常に大きくな
り、射出圧力を大幅に高くする必要がある。逆
に、発熱管の出口側では、温度が比較的高くなつ
て粘度が低下しているため、摩擦抵抗が小さく摩
擦による発熱が少なくなる。このため、大きな射
出圧力を加えているにもかかわらず、材料を効果
的に昇温することができず、エネルギーが有効に
利用されていなかつた。また、発熱管として薄肉
（例えば、0.3mm以下）の鋼管を用いているため、
高い射出圧力が作用すると破損する可能性がある
という問題もあつた。 However, in such conventional polymer plasticized material heating devices, the flow path cross-sectional area of the heat generating tube was constant from the inlet side to the outlet side, so there was a problem that the amount of heat generated at each part of the heat generating tube could not be made constant. The dot was hot. In other words, on the inlet side of the heating tube, not enough heat has been applied, so the material passes through the heating tube with a small cross-sectional area while the temperature is still low and the viscosity of the material is high, resulting in a very large pressure loss. , the injection pressure must be significantly increased. On the other hand, on the exit side of the heat generating tube, the temperature is relatively high and the viscosity is low, so the frictional resistance is small and the heat generation due to friction is reduced. For this reason, even though a large injection pressure is applied, the temperature of the material cannot be raised effectively, and energy is not used effectively. In addition, since a thin-walled (for example, 0.3 mm or less) steel pipe is used as the heat generating pipe,
There was also the problem that there was a possibility of breakage when high injection pressure was applied.
(ハ) 考案の目的
本考案は、高分子可塑化材料を複数個の小断面
積の流路を通過させる際に効率良く摩擦発熱を生
じさせることができる高分子可塑化材料加熱装置
を得ることを目的としている。(c) Purpose of the invention The present invention is to obtain a polymer plasticized material heating device that can efficiently generate frictional heat when the polymer plasticized material passes through a plurality of channels with small cross-sectional areas. It is an object.
(ニ) 考案の構成
本考案による高分子可塑化材料加熱装置の発熱
用の複数個の小断面積流路は１つの発熱用部材に
設けられた複数個の貫通穴によつて構成されてお
り、各貫通穴は入口側の大径部から出口側の小径
部に向つて少なくとも３段階に径が縮小してい
る。こうすることによつて小断面積流路の全長に
わたつてほぼ一様な発熱を得ることができる。(d) Structure of the invention The plurality of small cross-sectional area flow paths for heat generation in the polymer plasticized material heating device according to the invention are constituted by a plurality of through holes provided in one heat generation member. The diameter of each through hole decreases in at least three steps from a large diameter portion on the inlet side to a small diameter portion on the exit side. By doing so, substantially uniform heat generation can be obtained over the entire length of the small cross-sectional area flow path.
(ホ) 実施例
第１及び２図に本考案の実施例を示す。射出シ
リンダ１０の先端部に発熱用部材１２が取り付け
られており、この発熱用部材１２にノズル１４が
取り付けられる。発熱用部材１２には、射出シリ
ンダ１０の射出プランジヤ１５の前方の可塑化材
料貯留室１６とノズル１４とを連通させる複数の
貫通穴１８（小断面積流路）が穴あけ加工されて
いる。貫通穴１８は、大径部１８ａ、中径部１８
ｂ及び小径部１８ｃの３段階の部分から構成され
ており、可塑化材料貯留室１６側からノズル１４
側へ流路断面積が減少するように配置されてい
る。大径部１８ａ、中径部１８ｂ及び小径部１８
ｃは、例えばそれぞれ直径３mm、2.5mm及び1.5mm
の組合せ、直径２mm、1.5mm及び0.5mmの組合せ等
で使用する。なお、射出シリンダ１０及び発熱用
部材１２にはそれぞれ熱媒を通すためのジヤケツ
ト２０及び２２が設けられている。(E) Embodiment Figures 1 and 2 show embodiments of the present invention. A heat generating member 12 is attached to the tip of the injection cylinder 10, and a nozzle 14 is attached to this heat generating member 12. A plurality of through holes 18 (small cross-sectional area channels) are formed in the heat generating member 12 to communicate the plasticized material storage chamber 16 in front of the injection plunger 15 of the injection cylinder 10 with the nozzle 14 . The through hole 18 has a large diameter portion 18a and a medium diameter portion 18.
The nozzle 14 is composed of three stages: b and small diameter part 18c, and the nozzle 14 is
The cross-sectional area of the flow path decreases toward the side. Large diameter part 18a, medium diameter part 18b and small diameter part 18
For example, c is 3 mm, 2.5 mm, and 1.5 mm in diameter, respectively.
Used in combinations of diameters 2mm, 1.5mm and 0.5mm. Incidentally, the injection cylinder 10 and the heat generating member 12 are provided with jackets 20 and 22, respectively, for passing a heat medium therethrough.
次にこの実施例の作用について説明する。可塑
化材料貯留室１６内の溶融材料は射出プランジヤ
１５の前進によつて押し出され、発熱用部材１２
に設けられた貫通穴１８を通過する。溶融材料が
貫通穴１８を通過する際に大きな圧力損失（例え
ば、500〜1000Kg／cm2）を生じ、この圧力損失分
は熱に変わる。このため、溶融材料の温度は貫通
穴１８を通過する間に熱架橋反応温度まで上昇す
る。しかも、この発熱は貫通穴１８の全長にわた
つてほぼ一定の割合で得られる。すなわち、材料
は温度が低い状態では流路断面積の比較的大きい
大径部１８ａを通過するため、材料の粘度が高い
にもかかわらず、過大な摩擦損失は発生しない。
こうして、ある程度温度が上昇して粘度が低下す
ると、流路断面積が少し減少した中径部１８ｂを
通過させ、ここでも一定の摩擦熱を発生させる。
更に温度が上昇して粘度が低下すると、流路断面
積の最も小さい小径部１８ｃを通過させる。大径
部１８ａ、中径部１８ｂ及び小径部１８ｃの流路
断面積の比率は材料の温度上昇に伴なう粘度低下
にほぼ比例させてあり、上述のように貫通穴１８
の全長にわたつてほぼ一定割合の摩擦発熱を得る
ことができる。こうして、昇温された溶融材料は
ノズル１４から図示してない金型キヤビイテイ内
に射出される。 Next, the operation of this embodiment will be explained. The molten material in the plasticized material storage chamber 16 is pushed out by the advancement of the injection plunger 15 and
It passes through the through hole 18 provided in the. When the molten material passes through the through hole 18, a large pressure loss (for example, 500 to 1000 Kg/cm 2 ) occurs, and this pressure loss is converted into heat. Therefore, the temperature of the molten material rises to the thermal crosslinking reaction temperature while passing through the through hole 18. Moreover, this heat generation is obtained at a substantially constant rate over the entire length of the through hole 18. That is, since the material passes through the large diameter portion 18a having a relatively large flow path cross-sectional area when the temperature is low, excessive friction loss does not occur even though the material has a high viscosity.
In this way, when the temperature rises to a certain extent and the viscosity decreases, the fluid passes through the medium diameter portion 18b where the cross-sectional area of the flow path is slightly reduced, and a certain amount of frictional heat is generated here as well.
When the temperature further increases and the viscosity decreases, the flow passage passes through the small diameter portion 18c having the smallest cross-sectional area. The ratio of the flow path cross-sectional areas of the large-diameter portion 18a, the medium-diameter portion 18b, and the small-diameter portion 18c is approximately proportional to the decrease in viscosity accompanying the temperature rise of the material, and as described above, the through-hole 18
It is possible to obtain an approximately constant rate of frictional heat generation over the entire length of the shaft. The heated molten material is injected from the nozzle 14 into a mold cavity (not shown).
上記のように、溶融材料は貫通穴１８の全長に
わたつてほぼ一定の摩擦熱を得るため、材料温度
は効率良く上昇し、また貫通穴１８を通過させる
ために過大な圧力を加える必要がなく、エネルギ
ーが有効に利用される。また、この実施例では、
貫通穴１８は発熱用部材１２に穴あけ加工するこ
とにより、構成されているため、十分な強度を有
しており、2000Kg／cm2程度の高い射出圧力が作用
しても損傷することはない。なお、材料の粘度な
どにより昇温効果は変動するが、貫通穴１８によ
り30〜50℃の昇温効果を得ることができる。 As mentioned above, the molten material receives approximately constant frictional heat over the entire length of the through hole 18, so the temperature of the material increases efficiently, and there is no need to apply excessive pressure to pass through the through hole 18. , energy is used effectively. Also, in this example,
Since the through hole 18 is formed by drilling the heat generating member 12, it has sufficient strength and will not be damaged even if a high injection pressure of about 2000 kg/cm 2 is applied. Although the temperature increase effect varies depending on the viscosity of the material, etc., it is possible to obtain a temperature increase effect of 30 to 50° C. through the through holes 18.
(ヘ) 考案の効果
以上説明してきたように、本考案による高分子
可塑化材料加熱装置は、発熱用の小断面積流路の
断面積を入口側から出口側に向けて少なくとも３
段階に減少させてあるので、小断面積流路の全長
にわたつてほぼ一定割合の発熱を得ることがで
き、エネルギーを有効に利用することが可能とな
る。また、複数個の小断面積流路は１つ発熱用部
材に設けられた複数個の貫通穴によつて構成され
ているため、十分な強度を有している。また、貫
通穴は段階的に変化する径を有するものであるか
ら大径側から順次穴あけ加工していけばよく、細
長いテーパ穴を加工する場合と比較して、格段に
製造が容易化される。(f) Effect of the invention As explained above, the polymer plasticized material heating device according to the invention has a cross-sectional area of the small cross-sectional area flow path for heat generation that is at least 3.
Since it is reduced in steps, it is possible to obtain heat generation at a substantially constant rate over the entire length of the small cross-sectional area flow path, making it possible to use energy effectively. Moreover, since the plurality of small cross-sectional area channels are constituted by a plurality of through holes provided in one heat generating member, they have sufficient strength. In addition, since the through-hole has a diameter that changes in stages, it is only necessary to drill the hole sequentially starting from the large diameter side, which greatly simplifies manufacturing compared to drilling a long and narrow tapered hole. .
第１図は本考案の実施例を示す図、第２図は第
１図の−線に沿う断面図である。
１０……射出シリンダ、１２……発熱用部材、
１５……射出プランジヤ、１４……ノズル、１６
……可塑化材料貯留室、１８……貫通穴（小断面
積流路）、１８ａ……大径部、１８ｂ……中径部、
１８ｃ……小径部。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the - line in FIG. 1. 10... Injection cylinder, 12... Heat generating member,
15...Injection plunger, 14...Nozzle, 16
...Plasticized material storage chamber, 18...Through hole (small cross-sectional area flow path), 18a...Large diameter part, 18b...Medium diameter part,
18c...Small diameter part.
Claims (1)
塑化材料をノズルから射出する前に複数個の小断
面積流路を通過させ摩擦抵抗による発熱によつて
昇温させるようにした高分子可塑化材料加熱装置
において、 複数個の小断面積流路は１つの発熱用部材に設
けられた複数個の貫通穴によつて構成されてお
り、各貫通穴は入口側の大径部から出口側の小径
部に向つて少なくとも３段階に径が縮小している
ことを特徴とする高分子可塑化材料加熱装置。[Claims for Utility Model Registration] Before being injected from a nozzle, the plasticized polymer material extruded from an injection device or extrusion device is passed through a plurality of small cross-sectional flow channels to raise its temperature by heat generation due to frictional resistance. In such a polymer plasticized material heating device, the plurality of small cross-sectional area channels are constituted by a plurality of through holes provided in one heat generating member, and each through hole is connected to the inlet side. A heating device for polymeric plasticized material, characterized in that the diameter decreases in at least three steps from a large diameter portion to a small diameter portion on the exit side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4679784U JPS60159614U (en) | 1984-04-02 | 1984-04-02 | Polymer plasticized material heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4679784U JPS60159614U (en) | 1984-04-02 | 1984-04-02 | Polymer plasticized material heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60159614U JPS60159614U (en) | 1985-10-23 |
| JPH018338Y2 true JPH018338Y2 (en) | 1989-03-06 |
Family
ID=30561528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4679784U Granted JPS60159614U (en) | 1984-04-02 | 1984-04-02 | Polymer plasticized material heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60159614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014199968A1 (en) * | 2013-06-11 | 2014-12-18 | センチュリーイノヴェーション株式会社 | Resin bonding device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5527704B1 (en) * | 2013-11-18 | 2014-06-25 | センチュリーイノヴェーション株式会社 | Resin bonding equipment |
| JP5527705B1 (en) * | 2013-11-26 | 2014-06-25 | センチュリーイノヴェーション株式会社 | Manufacturing method of molten resin |
| JP5527706B1 (en) * | 2013-11-26 | 2014-06-25 | センチュリーイノヴェーション株式会社 | Manufacturing method of molten resin |
| WO2016047732A1 (en) * | 2014-09-25 | 2016-03-31 | センチュリーイノヴェーション株式会社 | Melting vessel, injection device using same, injection molding and method for manufacturing same, and method for manufacturing inter-member junction material |
| JP6945365B2 (en) * | 2017-07-03 | 2021-10-06 | センチュリーイノヴェーション株式会社 | A melter, an injection device using the melter, and a method for manufacturing an injection molded product. |
| WO2025028442A1 (en) * | 2023-07-28 | 2025-02-06 | センチュリーイノヴェーション株式会社 | Melting apparatus for injection molding device and injection molded article using same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351904U (en) * | 1976-10-06 | 1978-05-02 | ||
| JPS57129631U (en) * | 1981-02-05 | 1982-08-12 | ||
| JPS57181835A (en) * | 1981-05-01 | 1982-11-09 | Takashi Miura | Heating method of polymeric plastic material |
-
1984
- 1984-04-02 JP JP4679784U patent/JPS60159614U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014199968A1 (en) * | 2013-06-11 | 2014-12-18 | センチュリーイノヴェーション株式会社 | Resin bonding device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60159614U (en) | 1985-10-23 |
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