JPH036892B2 - - Google Patents
Info
- Publication number
- JPH036892B2 JPH036892B2 JP7331284A JP7331284A JPH036892B2 JP H036892 B2 JPH036892 B2 JP H036892B2 JP 7331284 A JP7331284 A JP 7331284A JP 7331284 A JP7331284 A JP 7331284A JP H036892 B2 JPH036892 B2 JP H036892B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- plunger
- cylinder
- heat transfer
- 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
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000011347 resin Substances 0.000 description 21
- 229920005989 resin Polymers 0.000 description 21
- 239000008188 pellet Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- HBGPNLPABVUVKZ-POTXQNELSA-N (1r,3as,4s,5ar,5br,7r,7ar,11ar,11br,13as,13br)-4,7-dihydroxy-3a,5a,5b,8,8,11a-hexamethyl-1-prop-1-en-2-yl-2,3,4,5,6,7,7a,10,11,11b,12,13,13a,13b-tetradecahydro-1h-cyclopenta[a]chrysen-9-one Chemical compound C([C@@]12C)CC(=O)C(C)(C)[C@@H]1[C@H](O)C[C@]([C@]1(C)C[C@@H]3O)(C)[C@@H]2CC[C@H]1[C@@H]1[C@]3(C)CC[C@H]1C(=C)C HBGPNLPABVUVKZ-POTXQNELSA-N 0.000 description 1
- PFRGGOIBYLYVKM-UHFFFAOYSA-N 15alpha-hydroxylup-20(29)-en-3-one Natural products CC(=C)C1CCC2(C)CC(O)C3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 PFRGGOIBYLYVKM-UHFFFAOYSA-N 0.000 description 1
- 241001417523 Plesiopidae Species 0.000 description 1
- SOKRNBGSNZXYIO-UHFFFAOYSA-N Resinone Natural products CC(=C)C1CCC2(C)C(O)CC3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 SOKRNBGSNZXYIO-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002195 synergetic effect Effects 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
- B29C45/58—Details
- B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
-
- 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
- B29C45/72—Heating or cooling
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は樹脂加工に用いられるプランジヤー式
射出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a plunger type injection device used for resin processing.
従来例の構成とその問題点
近年、生産現場における効率化が進み、装置の
大きさとスペース生産性という尺度で評価される
に至り、装置の付加価値の大きさと寸法的な大き
さが対比されるようになつて来た。Conventional configurations and their problems In recent years, as production sites have become more efficient, equipment size and space productivity have come to be evaluated, and the added value of equipment is compared with its dimensional size. It has become like this.
射出成形機においても同様なことが要求されつ
つある。ところが従来より射出成形機の射出装置
はインラインスクリユー式が一般的であり、スペ
ース的な有利なプランジヤー式は採用されること
が稀であつた。これはインラインスクリユー式の
射出性能が安定しており、プランジヤー式のそれ
は著しく劣ることに帰因していた。 Similar requirements are also emerging for injection molding machines. However, conventionally, the injection device of an injection molding machine has generally been an in-line screw type, and a plunger type, which is advantageous in terms of space, has rarely been adopted. This was due to the fact that the injection performance of the in-line screw type was stable, whereas that of the plunger type was significantly inferior.
第１図は従来のプランジヤー式射出装置の代表
的な構成の断面図を示す。 FIG. 1 shows a sectional view of a typical configuration of a conventional plunger type injection device.
シリンダ１の通孔２は樹脂を入れる穴であり、
なおかつプランジヤー３と嵌合する。シリンダ１
にはフランジ４が螺合され、さらにフランジ４に
ノズル５が螺合されている。上記シリンダ１とフ
ランジ４とノズル５とで加熱筒を形成し、加熱筒
の周囲には加熱手段としてヒータ６が良く用いら
れる。フランジ４の中心部にはトーピード７が用
けられ、トーピード７を支技する部分にはオリフ
イス孔８が設けられている。ノズル５にはトーピ
ード７の凸部７ｂと一定の距離隔てるように設け
られた壁面９を有す穴が設けられ、前記穴はノズ
ル孔１０と連通する。上記構成において、シリン
ダ１に供給されたペレツト状の樹脂１１はプラン
ジヤー３によりトーピード７の方に押し出され
る。樹脂１２は、樹脂１１が供給される１サイク
ル前の樹脂を表わし、シリンダ１からの熱のプラ
ンジヤ３の圧力によりペレツト間のスキ間がつぶ
された状態になつており、シリンダ１との接触面
付近は溶融状態になつている。更に前のサイクル
時に投入された材料はプランジヤ３の圧力により
オリフイス孔を通過する際に剪断発熱を受けて完
全に溶融してトーピード７の凸部７ｂとノズル壁
９との間に貯えられ、プランジヤ３の動作よりノ
ズル孔１０より射出される。 The through hole 2 of the cylinder 1 is a hole for inserting resin,
Moreover, it fits into the plunger 3. cylinder 1
A flange 4 is screwed onto the flange 4, and a nozzle 5 is screwed onto the flange 4. The cylinder 1, flange 4, and nozzle 5 form a heating cylinder, and a heater 6 is often used as a heating means around the heating cylinder. A torpedo 7 is used in the center of the flange 4, and an orifice hole 8 is provided in a portion that supports the torpedo 7. The nozzle 5 is provided with a hole having a wall surface 9 provided so as to be separated from the convex portion 7b of the torpedo 7 by a certain distance, and the hole communicates with a nozzle hole 10. In the above structure, the pellet-shaped resin 11 supplied to the cylinder 1 is pushed out toward the torpedo 7 by the plunger 3. Resin 12 represents the resin one cycle before the resin 11 is supplied, and the gap between the pellets is collapsed by the pressure of the plunger 3 of heat from the cylinder 1, and the contact surface with the cylinder 1 is The surrounding area is in a molten state. Further, the material introduced in the previous cycle receives shear heat when passing through the orifice hole due to the pressure of the plunger 3, and is completely melted and stored between the convex part 7b of the torpedo 7 and the nozzle wall 9, and is then transferred to the plunger. 3, the liquid is ejected from the nozzle hole 10.
上記構成は一般のプランジヤ式の射出装置であ
り、場合によりオリフイス孔の代りに溝となつた
構成のものもある。 The above configuration is a general plunger type injection device, and in some cases, there is also a configuration in which a groove is used instead of an orifice hole.
プランジヤー式射出装置の特徴は、射出動作中
に、樹脂をオリフイス孔から押し出すことと、ノ
ズルから射出することが同時に行なわれることに
ある。オリフイス孔の役割はオリフイス孔を通過
する樹脂の粘度が高いと、そこでの剪断発熱が大
きくなり、樹脂の温度が高くなり、従つて粘度が
下がり、粘度が低い場合は、剪断発熱が少ないの
で粘度変化が少ない、結果として溶融粘度を安定
化させることにある。ところが、プランジヤーに
加えられた力学的エネルギーが、剪断発熱により
熱エネルギーになるのであるから、ノズル孔から
金型（図示せず）に射出される樹脂のエネルギー
は、剪断発熱の量により変化し、結果として、射
出成形条件が安定しなくなる。 A feature of the plunger type injection device is that during the injection operation, the resin is pushed out from the orifice hole and injected from the nozzle at the same time. The role of the orifice hole is that when the viscosity of the resin passing through the orifice hole is high, the shear heat generated there increases, the temperature of the resin increases, and the viscosity decreases. The aim is to stabilize the melt viscosity with little change. However, since the mechanical energy applied to the plunger becomes thermal energy due to shear heat generation, the energy of the resin injected from the nozzle hole into the mold (not shown) changes depending on the amount of shear heat generation. As a result, injection molding conditions become unstable.
この不安定度は成形品の大きさや、樹脂の供給
量のバラツキによるクツシヨン位置（プランジヤ
ーの射出時における最下端の位置）のバラツキに
より変わるが、いずれにしても不安定な要因を持
つていることが、プランジヤー式射出方式を採用
できない理由になつている。 The degree of instability varies depending on the size of the molded product and variations in the cushion position (lowest position during injection of the plunger) due to variations in the amount of resin supplied, but in any case, there is a factor causing instability. This is the reason why the plunger type injection method cannot be adopted.
発明の目的
本発明は、上記欠点を解消し、小型で射出性能
が安定したプランジヤー式射出装置を供給するこ
とにある。OBJECTS OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a plunger type injection device that is small in size and has stable injection performance.
発明の構成
本発明のプランジヤー式射出装置は、通孔を有
する加熱筒と前記加熱筒の内部に設けられたトー
ピードと、前記加熱筒を昇温する加熱手段と、前
記加熱筒の通孔に進入するプランジヤーと前記加
熱筒の内部に設けられた伝熱フインより成り、前
記伝熱フインがトーピードとプランジヤーとの間
に位置し、伝熱フインの周囲が前記加熱筒の通孔
内壁と密着して設けられたものであり、伝熱フイ
ンにて加熱筒の中心部の樹脂を効率良く加熱でき
るので、プランジヤーの射出エネルギーのロスを
低下して、安定した成形が可能となる。Structure of the Invention The plunger type injection device of the present invention includes a heating cylinder having a through hole, a torpedo provided inside the heating cylinder, a heating means for raising the temperature of the heating cylinder, and a torpedo that enters the through hole of the heating cylinder. and a heat transfer fin provided inside the heating tube, the heat transfer fin being located between the torpedo and the plunger, and the periphery of the heat transfer fin being in close contact with the inner wall of the through hole of the heating tube. Since the heat transfer fins can efficiently heat the resin in the center of the heating cylinder, the loss of injection energy of the plunger is reduced and stable molding is possible.
実施例の説明
以下本発明の実施例をもとに説明を行なう。第
２図は本発明の一実施例のプランジヤー式射出装
置を示す断面図であり、第２図ａは縦断面図、第
２図ｂはａのＡ−A′に沿つた断面図である。駆
動装置（図示せず）により上下方向に駆動される
プランジヤー１３は、シリンダ１４の通孔１５に
進入可能であり、シリンダ１４にはフランジ１６
が螺合され、フランジ１６にはノズル１７が螺合
されている。フランジ１６の中心部は２つの凸部
１８ａ，１８ｂを有するトーピード１８が設けら
れ、トーピード１８の支持部には複数の穴１９が
設けられ、オリフイス孔として作用する。ノズル
１７の内部は、トーピード１８の凸部１８ｂと空
間２６を隔てた壁面２０を有する穴が設けられ、
空間２６と連通するノズル孔２７が設けられてい
る。上記シリンダ１４とフランジ１６とノズル１
７とで加熱筒を形成し、加熱筒の外周には加熱手
段をなすヒータ２１が設けられている。また図示
していないがシリンダ１４の温度を検出する熱電
対がシリンダ１４に埋設されている。シリンダ１
４の内壁面は小径部２２と大径部２３との段差が
設けられており、大径部の壁面２３に接して伝熱
フイン２４が設けられている。伝熱フイン２４の
空間部２５はペレツトサイズより大きな空間であ
り、シリンダ１４の通孔１５と、伝熱フイン２４
の空間部２５と穴１９と空間２６とノズル孔２７
とは互いに連なつており、加熱筒の通孔を形成し
ている。DESCRIPTION OF EMBODIMENTS Hereinafter, explanations will be given based on embodiments of the present invention. 2 is a sectional view showing a plunger type injection device according to an embodiment of the present invention, FIG. 2a is a longitudinal sectional view, and FIG. 2b is a sectional view taken along line A-A' of a. A plunger 13 driven vertically by a drive device (not shown) can enter a through hole 15 of a cylinder 14, and a flange 16 is provided in the cylinder 14.
are screwed together, and a nozzle 17 is screwed into the flange 16. A torpedo 18 having two convex portions 18a and 18b is provided at the center of the flange 16, and a plurality of holes 19 are provided in the support portion of the torpedo 18, which function as orifice holes. The inside of the nozzle 17 is provided with a hole having a wall surface 20 separating the convex portion 18b of the torpedo 18 and a space 26.
A nozzle hole 27 communicating with the space 26 is provided. The above cylinder 14, flange 16 and nozzle 1
7 forms a heating cylinder, and a heater 21 serving as a heating means is provided on the outer periphery of the heating cylinder. Although not shown, a thermocouple for detecting the temperature of the cylinder 14 is embedded in the cylinder 14. cylinder 1
The inner wall surface of No. 4 is provided with a step between a small diameter portion 22 and a large diameter portion 23, and heat transfer fins 24 are provided in contact with the wall surface 23 of the large diameter portion. The space 25 of the heat transfer fin 24 is larger than the pellet size, and the space 25 of the heat transfer fin 24 is larger than the pellet size.
space 25, hole 19, space 26, and nozzle hole 27
are connected to each other and form a through hole of the heating cylinder.
上記構成においてシリンダ１４に投入されたペ
レツト状の樹脂２８はプランジヤー１３の作用に
より下方に送られる。樹脂２９は１サイクル前に
供給された樹脂であり、プランジヤー１３がシリ
ンダ１４の穴１５に進入した際に圧縮を受けペレ
ツト間のすき間がつぶされる。一部の樹脂は伝熱
フインの近傍に位置し、更に前のサイクルで投入
された樹脂は伝熱フインの空間部２５に位置す
る。空間部２５においては伝熱フインからの最大
距離が穴１５の中心部のシリンダ壁面２２からの
距離よりもはるかに小さく、伝熱効率が距離の自
乗に比例することから、樹脂を溶融する能力が向
上し固化もしくは粘度の高い樹脂が穴１９に直接
進入することがなくなり、安定した条件が得られ
る。また伝熱フインに向つて樹脂２９が押し当て
られても、空間部２５の大きさがペレツトサイズ
より大きいことと、伝熱フインに接触した樹脂は
溶けるので無理なく進入できるが、望ましくは、
第３図に示すように伝熱フイン３０の上端３１を
鋭くしておいた方が良い。また材質はアルミニウ
ム、鉄など伝熱性の良いものが望ましい。 In the above structure, the pellet-shaped resin 28 charged into the cylinder 14 is sent downward by the action of the plunger 13. The resin 29 is the resin supplied one cycle before, and when the plunger 13 enters the hole 15 of the cylinder 14, it is compressed and the gaps between the pellets are crushed. Some of the resin is located near the heat transfer fins, and the resin added in the previous cycle is located in the space 25 of the heat transfer fins. In the space 25, the maximum distance from the heat transfer fin is much smaller than the distance from the center of the hole 15 from the cylinder wall surface 22, and the heat transfer efficiency is proportional to the square of the distance, so the ability to melt the resin is improved. This prevents solidified or highly viscous resin from directly entering the hole 19, and stable conditions can be obtained. Furthermore, even if the resin 29 is pressed against the heat transfer fins, the size of the space 25 is larger than the pellet size, and the resin that comes into contact with the heat transfer fins melts, so it can easily enter.
As shown in FIG. 3, it is better to make the upper end 31 of the heat transfer fin 30 sharp. In addition, it is desirable that the material has good heat conductivity, such as aluminum or iron.
第４図、第５図は伝熱フインのほかの望ましい
断面の一例を示すものであり、連続した円周部３
２は長いフイン３３と短かいフイン３４が中心部
に向つて突起しているものや、二重円筒にリブ３
５を設けたものが良い。 Figures 4 and 5 show examples of other desirable cross sections of heat transfer fins, in which the continuous circumferential portion 3
2 has long fins 33 and short fins 34 protruding toward the center, or a double cylinder with ribs 3.
The one with 5 is better.
発明の効果
１ 伝熱フインの予備加熱効果とトーピード部分
での剪断発熱効果の相乗作用により、均一な樹
脂の可塑化が可能となり、良好な射出性能が得
られ成形品の寸法が安定する。Effect of the invention 1 The synergistic effect of the preheating effect of the heat transfer fins and the shear heat generation effect of the torpedo portion makes it possible to uniformly plasticize the resin, resulting in good injection performance and stable dimensions of the molded product.
２ スクリユー方式よりはるかに短い装置で、構
成も単純となり、小型、安価な成形機が得られ
る。2. The device is much shorter than the screw method, the configuration is simpler, and a compact and inexpensive molding machine can be obtained.
第１図は従来のプランジヤー式射出装置の断面
図、第２図ａは本発明の一実施例によるプランジ
ヤー式射出装置の縦断面図、第２図ｂは同横断面
図、第３図は同伝熱フインの外観図、第４図及び
第５図は別の実施例による伝熱フインの断面図で
ある。
１５……通孔、１９……穴、２６……空間、２
７……ノズル孔、１４……シリンダ、１６……フ
ランジ、１７……ノズル、１８……トーピード、
２１……ヒータ、１３……プランジヤー、２４…
…伝熱フイン。
Fig. 1 is a sectional view of a conventional plunger type injection device, Fig. 2a is a longitudinal sectional view of a plunger type injection device according to an embodiment of the present invention, Fig. 2b is a cross-sectional view of the same, and Fig. 3 is the same. The external view of the heat transfer fin, and FIGS. 4 and 5 are cross-sectional views of the heat transfer fin according to another embodiment. 15...through hole, 19...hole, 26...space, 2
7... Nozzle hole, 14... Cylinder, 16... Flange, 17... Nozzle, 18... Torpedo,
21...Heater, 13...Plunger, 24...
...Heat transfer fin.
Claims (1)
設けられたトーピードと、前記加熱筒を昇温する
加熱手段と、前記加熱筒の通孔に進入するプラン
ジヤーと、前記加熱筒の通孔部に設けられた伝熱
フインとより成り、前記伝熱フインがトーピード
とプランジヤーとの間に位置し、伝熱フインの周
囲が前記加熱筒の通孔内壁と密着して設けられた
プランジヤー式射出装置。1. A heating cylinder having a through hole, a torpedo provided inside the heating cylinder, a heating means for raising the temperature of the heating cylinder, a plunger that enters the through hole of the heating cylinder, and a through hole of the heating cylinder. A plunger-type injection device comprising a heat transfer fin provided in the heating cylinder, the heat transfer fin being located between the torpedo and the plunger, and the periphery of the heat transfer fin being in close contact with the inner wall of the through hole of the heating cylinder. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59073312A JPS60217123A (en) | 1984-04-12 | 1984-04-12 | Plunger type injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59073312A JPS60217123A (en) | 1984-04-12 | 1984-04-12 | Plunger type injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60217123A JPS60217123A (en) | 1985-10-30 |
| JPH036892B2 true JPH036892B2 (en) | 1991-01-31 |
Family
ID=13514526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59073312A Granted JPS60217123A (en) | 1984-04-12 | 1984-04-12 | Plunger type injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60217123A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5547905B2 (en) * | 2009-04-06 | 2014-07-16 | 株式会社東洋精機製作所 | Resin extrusion processing equipment |
| JP5417549B1 (en) * | 2013-06-11 | 2014-02-19 | センチュリーイノヴェーション株式会社 | Resin bonding equipment |
-
1984
- 1984-04-12 JP JP59073312A patent/JPS60217123A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60217123A (en) | 1985-10-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |