JPH02265722A - Injection apparatus of injection molding machine - Google Patents
Injection apparatus of injection molding machineInfo
- Publication number
- JPH02265722A JPH02265722A JP8680089A JP8680089A JPH02265722A JP H02265722 A JPH02265722 A JP H02265722A JP 8680089 A JP8680089 A JP 8680089A JP 8680089 A JP8680089 A JP 8680089A JP H02265722 A JPH02265722 A JP H02265722A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- screw
- hopper
- transferred
- main
- 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.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 9
- 238000002347 injection Methods 0.000 title claims description 11
- 239000007924 injection Substances 0.000 title claims description 11
- 239000002994 raw material Substances 0.000 claims abstract description 62
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000004579 marble Substances 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 238000004898 kneading Methods 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- AZBAQHIVVLQMFX-UHFFFAOYSA-N 4-(2,4-dimethylphenyl)-5-methyl-1,3-thiazol-2-amine Chemical compound S1C(N)=NC(C=2C(=CC(C)=CC=2)C)=C1C AZBAQHIVVLQMFX-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1634—Making multilayered or multicoloured articles with a non-uniform dispersion of the moulding material in the article, e.g. resulting in a marble effect
-
- 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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C45/1866—Feeding multiple materials
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (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、熱可塑性樹脂によりマーブル模様等の模様を
有する成形品を成形する射出成形機の射出装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an injection device for an injection molding machine that molds a molded product having a pattern such as a marble pattern using a thermoplastic resin.
［従来の技術］
従来、２種以上の異なる色の樹脂を混ぜ合せてマーブル
（大理石）模様等の模様を有する成形品を得る技術とし
ては、例えば実開昭５１−４５９６１号公報、特開昭４
８−４２０６０号公報、特公昭６０−３７７７７号公報
等が知られている。[Prior Art] Conventionally, as a technique for obtaining a molded product having a pattern such as a marble pattern by mixing two or more resins of different colors, for example, Japanese Utility Model Application Publication No. 51-45961 and Japanese Patent Application Laid-Open No. 4
Publication No. 8-42060, Japanese Patent Publication No. 60-37777, etc. are known.
これらに用いられている射出装置は、プランジャー式又
はスクリュー式であり、それぞれプランジャーとトーピ
ード又はスクリューとトーピードを加熱箇に内蔵してい
て、１つのホッパーに２種以上の樹脂原料を投入して成
形している。The injection devices used for these are plunger type or screw type, and each has a plunger and torpedo or screw and torpedo built into the heating section, and two or more types of resin raw materials are put into one hopper. It is molded using
［発明が解決しようとする問題点］
従って、プランジャー式の装置では、プランジャーの先
端面に空隙部が発生し易くなり、そのためシルバースト
リークが発生し、良好な成形品が得られない。[Problems to be Solved by the Invention] Therefore, in a plunger-type device, voids are likely to occur on the tip surface of the plunger, resulting in silver streaks and making it impossible to obtain a good molded product.
また、単にスクリュー式の装置では、当初からすでに混
ぜ合せた樹脂原料が投入されるため、溶融、混練が進み
過ぎて良好な模様ができにくいので、所要の模様を得る
には、加熱筒内の樹脂原料を加熱筒の温度制御によっで
ある程度混練りしにくくする必要があり、従って樹脂原
料の流動性が悪く、かつ高い射出充填圧力が要求され、
成形安定性が悪い。In addition, with a simple screw-type device, the resin raw materials that have already been mixed are input from the beginning, so the melting and kneading progresses too much, making it difficult to form a good pattern. It is necessary to make it difficult to knead the resin raw material to some extent by controlling the temperature of the heating cylinder, so the fluidity of the resin raw material is poor and high injection filling pressure is required.
Poor molding stability.
また、特公昭６３−５０１７３号公報には、スクリュー
に複数の螺溝李設け、螺溝と同数のホッパに色の異なる
原料を投入して良好なマーブル模様を有する成形品を安
定して得ることができる技術が示されている。しかし、
この公知技術によれば、スクリュー根元部から始まる第
１の螺溝に入った原料は、螺溝に沿って移送されるが、
第２のホッパーの落下孔部で二色目の原料は第２の螺溝
だけでなく第１の螺溝の原料上にも落ち込み、結果的に
第１の原料と共に移送、溶融されるため、完全に複数の
原料を分離して移送、溶融することはできない。In addition, Japanese Patent Publication No. 63-50173 discloses that a screw is provided with a plurality of spiral grooves, and raw materials of different colors are fed into the same number of hoppers as the screw grooves to stably obtain a molded product with a good marble pattern. The technology that can do this is shown. but,
According to this known technique, the raw material entering the first screw groove starting from the screw root is transferred along the screw groove, but
At the drop hole of the second hopper, the second color material falls not only into the second helical groove but also onto the material in the first helical groove, and as a result, it is transferred and melted together with the first material, so that it is completely It is not possible to separate, transport, and melt multiple raw materials.
本発明は上記した問題を解決するためになされたもので
、良好なマーブル模様等の模様を有する成形品を安定し
て得ることができる射出成形機の射出装置を提供するこ
とを目的としている。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an injection device for an injection molding machine that can stably obtain molded products having a good pattern such as a marble pattern.
口課題を解決するための手段］
本発明によれば、熱可塑性樹脂によりマーブル模様等の
模様を有する成形品を成形する射出成形機の射出装置に
おいて、主原料用ホッパーを設けた加熱筒内に第１スク
リューを設け、該スクリューの移送方向下流側に該スク
リューと同心に第２スクリュー以下の複数のスクリュー
を設け、これら複数のスクリューと前記第１スクリュー
との間に環状の原料移送用通路を画成すると共に、それ
ら複数のスクリューに上流側から移送された原料を前記
原料移送用通路の入口部に導くフランジ部を突設し、該
フランジ部の直ぐ下流側の加熱筒部分に主原料用ホッパ
ーを設けている。Means for Solving the Problems] According to the present invention, in an injection device of an injection molding machine that molds a molded product having a pattern such as a marble pattern using a thermoplastic resin, a heating cylinder provided with a hopper for the main raw material is provided. A first screw is provided, a plurality of screws below the second screw are provided concentrically with the screw on the downstream side of the screw in the transfer direction, and an annular raw material transfer passage is provided between the plurality of screws and the first screw. At the same time, a flange portion is provided protruding from the plurality of screws to guide the raw material transferred from the upstream side to the entrance of the raw material transfer passage, and a heating cylinder portion immediately downstream of the flange portion is provided with a flange portion for guiding the raw material transferred from the upstream side to the entrance portion of the raw material transfer passage. A hopper is provided.
上記加熱筒のホッパー取付部には、ホッパー内の原料が
落下孔部で溶融するのを防止するため、冷却装置を設け
るのが好ましい。A cooling device is preferably provided at the hopper mounting portion of the heating tube in order to prevent the raw material in the hopper from melting in the drop hole.
また、前記落下孔部には、原料の食い込みを良くするた
め、テーバ部を形成するのが好ましい。Further, it is preferable that a tapered portion be formed in the drop hole portion in order to improve the penetration of the raw material.
［作用］
上記のように構成された射出成形機の射出装置において
、副原料用ホッパーの副原料は、第１スクリューのスク
リュー溝に入り込み、下流側に移送、溶融され、フラン
ジ部でせき止められて入口部を介し原料移送用通路に送
り込“まれる。[Function] In the injection device of the injection molding machine configured as described above, the auxiliary raw material in the hopper for auxiliary raw material enters the screw groove of the first screw, is transferred to the downstream side, is melted, and is blocked by the flange. It is fed into the raw material transfer passage through the inlet.
他方、主原料ホッパーの主原料は、第２スクリューのス
クリュー溝に入り込み主原料とは完全に分離された状態
で移送、溶融される。On the other hand, the main material in the main material hopper enters the screw groove of the second screw and is transferred and melted while being completely separated from the main material.
そして、原料移送用通路に送り込ました副原料は、射出
直前に出口部から第２スクリューのスクリュー溝に送り
出され、主原料と共にノズルから金型に射出される。し
たがって、主副原料が一体になっている距離は、最短と
なり、完全又は過度の混練りが防止される。Immediately before injection, the auxiliary raw material fed into the raw material transfer passage is sent out from the outlet to the screw groove of the second screw, and is injected from the nozzle into the mold together with the main raw material. Therefore, the distance over which the main and auxiliary raw materials are integrated becomes the shortest, and complete or excessive kneading is prevented.
［実施例］ 以下図面を参照して本発明の詳細な説明する。[Example] The present invention will be described in detail below with reference to the drawings.
第１図ないし第４図において、ヒータ５を備えた加熱筒
１には、下流側すなわち左方の前端（以下下流側を前方
という）に図示しないノズルが設けられ、内孔には第１
スクリューＡが回転自在に挿嵌され、その後部は図示し
ないオイルモータに連結されている。この加熱筒１には
、後側から順に副原料用ホッパー３、第１主原料用ホツ
パー４、以下図示しない第２、第３主原料用ホツパーが
立設され、これらホッパー３．４・・・の加熱筒１への
取付部には、それぞれ冷却装置８が設けられている。1 to 4, a heating cylinder 1 equipped with a heater 5 is provided with a nozzle (not shown) at the downstream side, that is, at the left front end (hereinafter, the downstream side will be referred to as the front), and a first nozzle is provided in the inner hole.
A screw A is rotatably inserted, and its rear end is connected to an oil motor (not shown). In this heating cylinder 1, a hopper 3 for an auxiliary raw material, a hopper 4 for a first main raw material, and a hopper for a second and third main raw material (not shown below) are vertically arranged in order from the rear side, and these hoppers 3, 4... A cooling device 8 is provided at each attachment portion to the heating cylinder 1.
前記第１スクリューＡの前側には、例えば第１゜主原料
ホッパー４の下方に後部が位置するように第２スクリュ
ーＢが図示しない手段で第１スクリューＡと同心に一体
に設けられ、両スクリューＡ１Ｂの間には、環状の原料
移送用通路Ｃが画成されている。そして、第２スクリュ
ーＢの後部には、第１スクリューＡにより移送された副
原料１０をせき止めて移送用通路Ｃの４個の入口部Ｃ１
に導くフランジ部Ｂ１が突設されている。なお、加熱筒
１のホッパー３．４・・・の落下孔部１ ａ −、１゜
ｂ・・・には、原料の食い込みを促進するための図示し
ない下方に向けて縮径するテーパ部が形成されており、
また、ホッパー３．４・・・には、公知の図示しないシ
ャッターが設けられている。On the front side of the first screw A, a second screw B is provided concentrically and integrally with the first screw A by means not shown, so that the rear part is located below the first main material hopper 4, for example, and both screws An annular raw material transfer passage C is defined between A1B. At the rear of the second screw B, the auxiliary raw material 10 transferred by the first screw A is dammed up and the four inlets C1 of the transfer passage C are provided.
A flange portion B1 is provided to protrude. Incidentally, the drop holes 1a-, 1゜b... of the hoppers 3.4... of the heating cylinder 1 have tapered parts (not shown) whose diameter decreases downward in order to promote the penetration of the raw material. is formed,
Further, the hoppers 3, 4, . . . are provided with a known shutter (not shown).
射出成形に際し、まず、副原料用シャッター３のシャッ
ター３を開き、主原料用シャッター４・・・を閉じて第
１スクリューＡを回転する。すると、副原料１０が第１
スクリューＡのスクリュー溝６に入り込み、前方に移送
、溶融される。そして、第２スクリューＢのフランジ部
Ｂ、にせき止められ、入口部Ｃ１を介して原料移送用通
路Ｃに送り込まれる。During injection molding, first, the shutter 3 for the auxiliary raw material is opened, the shutters 4 for the main raw material are closed, and the first screw A is rotated. Then, the auxiliary raw material 10 becomes the first
It enters the screw groove 6 of screw A, is transported forward, and is melted. Then, it is dammed up by the flange portion B of the second screw B, and sent into the raw material transfer passage C via the inlet portion C1.
一定時間後に副原料１０が原料移送用通路Ｃの出口部Ｃ
２に達した時点で主原料用ホッパー４のシャッター４を
開く。すると、主原料１１が第２スクリューＢのスクリ
ュー溝７に入り込み、副原料１０とは完全に分離された
状態で移送、溶融される。After a certain period of time, the auxiliary raw material 10 is transferred to the exit part C of the raw material transfer passage C.
2, the shutter 4 of the main material hopper 4 is opened. Then, the main raw material 11 enters the screw groove 7 of the second screw B, and is transferred and melted while being completely separated from the auxiliary raw material 10.
そして、原料移送用通路Ｃに送り込まれた副原料１０は
、射出直前に出口部Ｃ２からスクリュー溝７に送り出さ
れ、主原料１１と共にノズルから金型に射出される。Immediately before injection, the auxiliary raw material 10 sent into the raw material transfer passage C is sent out from the outlet portion C2 to the screw groove 7, and is injected together with the main raw material 11 from the nozzle into the mold.
［発明の効果コ
本発明は、以上説明したように構成されているので、主
副原料を完全に別個に移送、溶融し、体となっている距
離を最短にして、従来のように完全あるいは過度に混練
りされるという現象を防止し、良好なマーブル模様を得
ることができる。[Effects of the Invention] Since the present invention is constructed as explained above, the main and auxiliary raw materials are completely transferred and melted separately, and the distance between them is minimized, so that they can be completely or It is possible to prevent the phenomenon of excessive kneading and obtain a good marble pattern.
また、第２スクリュー以下のスクリューの原料移送用通
路の入口部の口径を変え、主原料の種類や成形品の形状
等に容易に対応することができる。In addition, the diameter of the entrance portion of the raw material transfer passage of the screws below the second screw can be changed to easily correspond to the type of main raw material, the shape of the molded product, etc.
第１図は本発明の一実施例を示す側断面図、第２図、第
３図及び第４図はそれぞれ第１図のａ −ａ線、ｂ−ｂ
線及びｃ−ｃ線矢視断面図である。
Ａ・・・第１スクリュー Ｂ・・・第２スクリュー
Ｂ１ ・・・フランジ部 Ｃφ・・原料移送用通路
Ｃ０・・・入口部 １・・・加熱筒 ３・・・
主原料用ホッパー ４・・・第１主原料用ホツパー
１０・・・副原料１１・・・主原料
第
図
第３図FIG. 1 is a side sectional view showing one embodiment of the present invention, and FIGS. 2, 3, and 4 are lines a-a and bb-b in FIG. 1, respectively.
It is a sectional view taken along the line and the line c-c. A...First screw B...Second screw
B1...Flange part Cφ...Raw material transfer passage C0...Inlet part 1...Heating cylinder 3...
Hopper for main raw material 4... Hopper for first main raw material
10...Auxiliary raw materials 11...Main raw materials Figure 3
Claims (1)
品を成形する射出成形機の射出装置において、主原料用
ホッパーを設けた加熱筒内に第１スクリューを設け、該
スクリューの移送方向下流側に該スクリューと同心に第
２スクリュー以下の複数のスクリューを設け、これら複
数のスクリューと前記第１スクリューとの間に環状の原
料移送用通路を画成すると共に、それら複数のスクリュ
ーに上流側から移送された原料を前記原料移送用通路の
入口部に導くフランジ部を突設し、該フランジ部の直ぐ
下流側の加熱筒部分に主原料用ホッパーを設けたことを
特徴とする射出成形機の射出装置。In an injection device of an injection molding machine that molds a molded product having a pattern such as a marble pattern using thermoplastic resin, a first screw is provided in a heating cylinder provided with a hopper for the main raw material, and a first screw is provided on the downstream side of the screw in the transfer direction. A plurality of screws below the second screw are provided concentrically with the screw, and an annular material transfer passage is defined between the plurality of screws and the first screw, and the material is transferred to the plurality of screws from the upstream side. An injection device for an injection molding machine, characterized in that a flange portion is provided protrudingly for guiding the raw material to the entrance of the raw material transfer passage, and a hopper for the main raw material is provided in a heating cylinder portion immediately downstream of the flange portion. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8680089A JPH02265722A (en) | 1989-04-07 | 1989-04-07 | Injection apparatus of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8680089A JPH02265722A (en) | 1989-04-07 | 1989-04-07 | Injection apparatus of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02265722A true JPH02265722A (en) | 1990-10-30 |
Family
ID=13896872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8680089A Pending JPH02265722A (en) | 1989-04-07 | 1989-04-07 | Injection apparatus of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02265722A (en) |
-
1989
- 1989-04-07 JP JP8680089A patent/JPH02265722A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3339240A (en) | Apparatus for laminar injection molding | |
| JP3170757B2 (en) | Barrier screw | |
| US4155655A (en) | Apparatus for additive feeding | |
| EP0013154B1 (en) | Method of and apparatus for runnerless injection-compression molding thermosetting materials | |
| KR19990028426A (en) | Apparatus and method for injecting fiber strands into plastic materials | |
| DE2355187A1 (en) | VENTED INJECTION MOLDING DEVICE | |
| JPS63500580A (en) | Device for feeding plastic material to the extrusion head | |
| JPH10235700A (en) | Injection machine and injection method | |
| US6776600B1 (en) | Injection molding machine for producing injection-molded articles | |
| US12441038B2 (en) | Injection molding tool and method for the production thereof, and method for producing marbled molded parts | |
| US4106113A (en) | Feeding screw assembly of a molding machine for plasticizing masses, particularly, for plastics or rubber | |
| JPH0576408B2 (en) | ||
| JPH02265722A (en) | Injection apparatus of injection molding machine | |
| US5980098A (en) | Extrusion system and process for minimizing color change times in extrusion of thermoplastics | |
| JP2005007885A (en) | Stacked mold having melt homogenizing element | |
| US4012025A (en) | Mold for plastics, particularly multi-component plastics injection mold having blind channel | |
| US3663143A (en) | Apparatus for making hollow articles | |
| JPH04156320A (en) | Injection molding method and injection molder | |
| GB2028218A (en) | Screw-fed machine for the production of plastics articles and screw therefor | |
| JP3284233B2 (en) | Injection molding machine plasticizer | |
| JPS6438217A (en) | Mold apparatus for injection molding | |
| JP3474807B2 (en) | Wood-grained molded article, method for producing woodgrained molded article, and apparatus for producing woodgrained molded article | |
| KR100504245B1 (en) | catapult multicolor catapulting unit | |
| JPS63242509A (en) | Injection apparatus of injection molding machine | |
| KR100981785B1 (en) | Multi-layer Injection Molding Machine and Forming Method |