JPH0745157B2 - Molding machine - Google Patents
Molding machineInfo
- Publication number
- JPH0745157B2 JPH0745157B2 JP19655192A JP19655192A JPH0745157B2 JP H0745157 B2 JPH0745157 B2 JP H0745157B2 JP 19655192 A JP19655192 A JP 19655192A JP 19655192 A JP19655192 A JP 19655192A JP H0745157 B2 JPH0745157 B2 JP H0745157B2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- cylinder
- screw
- injection
- key
- 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 - Fee Related
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、塑性加工の技術分野に
属して、射出成形機の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of plastic working and relates to the structure of an injection molding machine.
【０００２】[0002]
【従来技術】従来に於ける射出成形機の機構は、射出シ
リンダーと射出スクリューと射出ノズルとを構成して、
そのシリンダーには成形用の原料である粒状又は粉体の
合成樹脂を溶融する電熱器を設けて有りホッパーから入
ってくる原料をシリンダー内で溶融する。そのシリンダ
ー内には回転しピストン運動をするスクリューを設け
て、溶融された原料はそのスクリューの回転で攪拌溶融
練合押出等をして、金型への射出注入はそのスクリュー
のピストン運動の圧縮圧力で成形型へその加圧された溶
融練合の合成樹脂を注入して望所形状の製品が成形され
る。スクリュー自体がピストン運動をしない装置では溶
融された合成樹脂を別途併設された加圧用のシリンダー
内へそのスクリューで溶融練合の合成樹脂を送り込み、
そのシリンダー内のピストンで加圧射出注入して望所形
状の製品が成形される。それらの場合は装置が複雑に成
って、特に溶融加圧された合成樹脂を成形用キャビテイ
へ射出注入をしたあとピストンの帰りの工程（吸引の工
程）でそのキャビテイへ注入した溶融合成樹脂の一部が
逆流をするのでその中間に逆流防止の装置対策を必要と
して、結果成形機のノズル周辺の構造を複雑にしてい
る。2. Description of the Related Art A conventional injection molding machine mechanism includes an injection cylinder, an injection screw, and an injection nozzle.
The cylinder is provided with an electric heater for melting a granular or powdery synthetic resin as a raw material for molding, and the raw material coming from the hopper is melted in the cylinder. A screw that rotates and makes a piston motion is provided in the cylinder, and the melted raw material is agitated, melted, kneaded and extruded by the rotation of the screw, and injected into the mold by compression of the piston motion of the screw. The desired shape of the product is molded by injecting the pressurized melt-kneaded synthetic resin into the mold by pressure. In a device where the screw itself does not make a piston movement, the synthetic resin melted and kneaded is sent by the screw into a cylinder for pressurizing the synthetic resin melted separately,
The product in the desired shape is formed by pressure injection and injection with the piston in the cylinder. In those cases, the apparatus becomes complicated, and in particular, the molten and pressurized synthetic resin is injected and injected into the molding cavity, and then one of the molten synthetic resin injected into the cavity in the step (suction step) after the piston return. Since the part causes backflow, a device for backflow prevention is required in the middle of the part, resulting in a complicated structure around the nozzle of the molding machine.
【０００３】[0003]
【発明が解決しようとする課題】前記した様に、シリン
ダーでの原料混合溶融練の効率化、金型のキャビテイへ
の射出注入後の逆流防止等に対する装置を可能な限り簡
素化をするべく問題点の解決を課題とした。[0007] As mentioned above, the efficiency of the raw material mixture melt kneading at a cylinder, a mold to calibration Bitei
The problem was solved in order to simplify the device for preventing backflow after injection injection as much as possible.
【０００４】[0004]
【課題を解決するための手段】課題を解決する手段は、
シリンダーの内側には合成樹脂である粒状又は粉体の原
料を混合溶融練をするスクリューを外側スクリューと内
側スクリューとが同軸状に設けて二重スクリュー構造に
して設け原料の溶融練作業の効化を図り、、該シリンダ
ーのヘッド部とピストン運動で該混合溶融練をした原料
を加圧射出させるプランジャーの先端部とにカギ状の開
口した通路を各々設けて、該プランジャーには加熱用カ
ートリッジヒーターを設けて合成樹脂である粒状又は粉
体の原料を混合溶融練を安定化させて、該プランジャー
には射出ノズルと結合したシリンダー内でピストン運動
をしてその加圧工程で蓄圧し射出容易にし得る様に蓄圧
室を設けて、該プランジャーのピストン運動の下死点に
て該シリンダーとプランジャーに設けたそれらカギ状の
通路は互いに同通する様に位置して設け且つ該ピストン
運動の吸引工程でプランジャーの一方向任意角度の正回
動と共に前記カギ状通路は同通される様に設けて、該ピ
ストン運動の圧縮工程でプランジャーの他方向任意角度
の逆回動と共に前記カギ状の通路は遮断される様に設け
て、該プランジャーの正逆回動とで前記通路に対してス
イッチング機能を付与し設けた、等の手段をもって課題
の解決をはかった。[Means for Solving the Problems] Means for solving the problems are
Inside the cylinder, a screw that mixes and melts the synthetic resin granular or powder raw material is provided with the outer screw and the inner screw coaxially to form a double screw structure to enable the raw material melting and kneading work. In order to heat the cylinder head and the tip of the plunger for injecting the mixed and kneaded raw materials by the piston motion, the plunger-like passage is provided. A cartridge heater is provided to mix the granular or powder raw material that is a synthetic resin to stabilize the melting and kneading, and the plunger performs piston movement in the cylinder connected to the injection nozzle to accumulate pressure in the pressurizing step. Accumulation to facilitate injection
A chamber is provided so that at the bottom dead center of the piston movement of the plunger, the key passages provided in the cylinder and the plunger are positioned so as to communicate with each other, and a plan is provided in the suction step of the piston movement. The key-shaped passage is provided so as to pass through it at the same time when the jar is rotated forwardly by an arbitrary angle in one direction. provided so as to be cut off
Then, the problem was solved by means such as providing a switching function for the passage by rotating the plunger forward and backward .
【０００５】[0005]
【実施例】図１は従前の成形機の略断面図である。シリ
ンダー９にはスクリュー１０を摺動回動自在に内蔵し
て、シリンダー９の外周面にヒター１１を設けて、シリ
ンダー９の先端にノズル９ａを設けて、シリンダー９の
後部に設けた穴９ｂにはホッパー１２を設けて、ノズル
９ａは金型１３のホットランナー１３ａへ接続可能に設
け、金型は上下に移動しノズル９ａの遮断閉塞をするよ
うに設け、それらを構成したものが知られている。これ
らの場合、粒状又は粉体合成樹脂である原材料１４を混
合溶融練を良くするためにスクリュー１０は所定長さが
必要であり、射出圧を得るためにスクリューの回転を高
速にし、更にピストン運動をさせることも必要である。
高圧射出の場合にノズルに於ける溶融合成樹脂の逆流防
止遮蔽、漏れ防止等の策として金型を上下移動をして溶
融樹脂の遮断を行っている。特に金型を移動させて溶融
合成樹脂の流れを遮断させることはノズルとの接面維持
の構造は大掛かりなものに成って複雑な構成が必要に成
ってくる。さらにスクリュウ１０の軸は大型なものにな
るとシリンダー９のヒーター１１だけでは温度管理が容
易では無く加熱の制御に問題が残りスクリュー１０の放
熱速度が大きいと安定した射出成形に支障を起たす場合
が多くある。1 is a schematic sectional view of a conventional molding machine. A screw 10 is slidably and rotatably incorporated in the cylinder 9, a hitter 11 is provided on the outer peripheral surface of the cylinder 9, and a nozzle 9a is provided at the tip of the cylinder 9,
A hopper 12 is provided in the hole 9b provided in the rear part , a nozzle 9a is provided so as to be connectable to the hot runner 13a of the mold 13, and the mold is provided so as to move up and down to block and close the nozzle 9a. The composition is known. In these cases, the screw 10 the raw material 14 is a granular or powder synthetic resin mixture melt kneading good to camphor order is required predetermined length, the faster the rotation of the screw in order to obtain the injection pressure, further piston It is also necessary to exercise.
In the case of high-pressure injection, the mold is moved up and down to shut off the molten resin as a measure to prevent backflow of molten synthetic resin at the nozzle and to prevent leakage. In particular, moving the mold to block the flow of the molten synthetic resin requires a complicated structure for maintaining the contact surface with the nozzle and requires a complicated structure. Further, when the shaft of the screw 10 becomes large, it is not easy to control the temperature only with the heater 11 of the cylinder 9, and there remains a problem in heating control, and if the heat dissipation rate of the screw 10 is large, stable injection molding is hindered. There are many.
【０００６】図２、図３は本発明の一実施例の略断面図
である。図２に示した様に、 本願の一実施例を詳述す
れば、シリンダー１の内側は同軸状に一方向回動する二
重スクリュー２を設け、該シリンダーのヘッド部１ａの
貫通穴１ｃ部分には望所長さのノズル５を結合し連通し
て設けてそのヘッド部１ａの内壁にはカギ状の開口した
通路１ｂを設けて、該二重スクリュー２は一方向へ回動
回転（矢印）する筒の外周面と内周面に互いに方向を異
にする螺旋状の外側スクリュー２ａと内側スクリュー２
ｂとが一体的構造を成して、その内側スクリュー２ｂの
内側には往復ピストン運動と任意角度正逆回動（矢印）
をするプランジャー３を内蔵して設けて、該プランジャ
ー３は加熱用カートリッジヒーター４と該プランジャー
の先端部分３ａにカギ状の開口した通路３ｂとを設け
て、該プランジャー３の先端部分３ａは該望所長さのノ
ズル５を結合したシリンダーヘッド部分の内周面に摺接
しピストン運動可能に設けて、該プランジャー３のピス
トン運動の下死点にて該シリンダー１とプランジャー３
に設けたそれらカギ状の通路１ｂ、３ｂは互いに同通す
る様に位置して設け且つ該ピストン運動の吸引工程でプ
ランジャー３の一方向任意角度の正回動と共に前記カギ
状通路１ｂ、３ｂは同通される様に設けて、該ピストン
の圧縮工程でプランジャー３の前記カギ状の通路１ｂ、
３ｂは遮断される様にスイッチング機能（該プランジャ
ー３のピストン運動に伴う望所角度の正逆回動）を付与
し設けて、本案の成形機は構成されている。本図におい
ては動力関係の図面は省略する。粒状又は粉体の合成樹
脂である原材料８はホッパー７へ充填され、二重スクリ
ュー２の一方向回動回転に伴ってシリンダー１へ送り込
まれてヒーター６の熱によって溶融する。溶融したその
原材料８は更にその移動と共に、外側スクリュー２ａで
混合練を経て、内側スクリュー２ｂへ送られる。更にそ
の送られた混合溶融練された原材料８は内側スクリュー
２ｂの回動と共にでカートリッジヒーター４の熱によっ
てその溶融練り送りを安定させて、カギ通路１ｂ、カギ
通路３ｂを経由してノズル５の蓄圧室５ａへ送り込まれ
る。この二重スクリュー２は外側スクリュー２ａと内側
スクリュー２ｂとの実効スクリュー長さの半分の長さに
有ってシリンダー１の長さをそれに応じて縮小されて省
スペースを可能にした。この二重スクリュー２は一方向
のみ回転（矢印）させて、その一方向回転と共に外側ス
クリュー２ａと同軸状にある内側スクリュー２ｂはとも
に同時に同方向へ回転して、ホッパー７へ充填された材
料は外側スクリュー２ａの左から右へ押され混合溶融練
されてスクリュー基部２ｄに有した通路２ｃを経由し内
側スクリュー２ｂへ移動し右から左へ押されてカギ状通
路１ｂ、３ｂへ押し出されるのであるが、シリンダー１
の大きさ長さは、その２重スクリュー２の実効スクリュ
ー長さ即ち従前のスクリュー１０（図１）の半分の長さ
に有ってシリンダー１の長さ自体はそれに応じて縮小さ
せて省スペースを可能にした。その溶融練りを安定され
た原材料８を型キャビテイ（図示せず）へ射出成形する
に際しては、プランジャー３はピストン運動の圧縮工程
に入るの際にプランジャー３を任意角度正方向に回動
（矢印）させて通路１ｂ、３ｂは閉じてその閉塞状態
（図３）で、プランジャー３のピストン運動の圧縮工程
によりノズル５の蓄圧室５ａ内でその溶融練された原材
料８は加圧されて高圧射出が可能となる。プランジャー
３の圧縮工程即ち射出工程が終わって、プランジャー３
を引き返す即ちピストン運動の吸引工程の際に、プラン
ジャー３を任意角度逆方向に回動（矢印）させ通路１
ｂ、３ｂは同通し通路開放の状態でプランジャー３を引
いて、ノズル５の蓄圧室５ａ内は内側スクリュー２ｂ内
の混合溶融練された原材料８が吸引充填される。プラン
ジャー３の構造と動作で前記カギ状の通路１ｂ、３ｂを
遮断又は開通のスイッチング動作作用を得てノズル５に
おいて、キャビテイ（図示せず）からの逆流は皆無とな
り、更に亦スクリュ２自体をピストン運動をさせない構
造を実現した。2 and 3 are schematic sectional views of an embodiment of the present invention. As shown in FIG. 2, if one embodiment of the present application is described in detail, the inside of the cylinder 1 is provided with a double screw 2 that rotates coaxially in one direction, and the through hole 1c portion of the head portion 1a of the cylinder is provided. the provided Te <br/> communicates combining nozzle 5 of Mochisho length pivoted on the inner wall of the head portion 1a is provided a key-shaped opening passageway 1b, said double screw 2 is in one direction A spiral outer screw 2a and inner screw 2 having different directions on the outer peripheral surface and the inner peripheral surface of the rotating (arrow) cylinder.
b forms an integral structure, and the reciprocating piston movement and any forward / backward rotation (arrow) are provided inside the inner screw 2b.
The plunger 3 is provided internally, and the plunger 3 is provided with a heating cartridge heater 4 and a leading end portion 3a of the plunger, and a passage 3b having a key-like opening, and the leading end portion of the plunger 3 is provided. 3a is slidably in contact with an inner peripheral surface of a cylinder head portion to which a nozzle 5 having the desired length is coupled so that the piston can move. At the bottom dead center of the piston movement of the plunger 3, the cylinder 1 and the plunger 3 are provided.
The key-shaped passages 1b, 3b provided in the above-mentioned manner are provided so as to communicate with each other, and in the suction process of the piston motion, the plunger-like passages 1b, 3b are rotated forward in one direction at an arbitrary angle. Are provided so as to pass through, and the key-shaped passage 1b of the plunger 3 is provided in the compression process of the piston.
3b is provided with a switching function (forward / reverse rotation of the desired angle associated with the piston movement of the plunger 3) so as to be cut off, and the molding machine of the present invention is configured. In this figure, drawings related to power are omitted. The raw material 8 which is a granular or powdery synthetic resin is filled in the hopper 7, is sent to the cylinder 1 as the double screw 2 rotates in one direction, and is melted by the heat of the heater 6. The melted raw material 8 is further moved and mixed and kneaded by the outer screw 2a, and then sent to the inner screw 2b. Further, the sent mixed and kneaded raw material 8 is stabilized by the heat of the cartridge heater 4 with the rotation of the inner screw 2b, and the raw material 8 of the nozzle 5 of the nozzle 5 is passed through the key passage 1b and the key passage 3b. It is sent to the pressure accumulating chamber 5a. The double screw 2 has a half length of the effective screw length of the outer screw 2a and the inner screw 2b, and the length of the cylinder 1 is reduced accordingly, which enables space saving. This double screw 2 is rotated only in one direction (arrow), Tomo inner screw 2b which is outside the screw 2a coaxially with the one-way rotation
And simultaneously rotated in the same direction, the material filled into the hopper 7 is moved through the passage 2c having a screw base 2d is mixed melt kneading is pushed from the left outer screw 2a to the right inward screw 2b right Is pushed to the left and pushed out to the key-shaped passages 1b and 3b.
The length is equal to the effective screw length of the double screw 2 , that is, half the length of the conventional screw 10 (FIG. 1) , and the length of the cylinder 1 itself is reduced accordingly to save space. Made possible. In injection-molding the melt-stabilized raw material 8 into a mold cavity (not shown), the plunger 3 is a compression process of piston movement.
At the time of entry, the plunger 3 is rotated in the positive direction by an arbitrary angle (arrow) to close the passages 1b and 3b, and in the closed state (FIG. 3), the compression process of the piston movement of the plunger 3 causes the nozzle 5 to move. The melted and kneaded raw material 8 is pressurized in the pressure accumulating chamber 5a to enable high pressure injection. After the compression process, that is, the injection process of the plunger 3, the plunger 3
During the suction process of the piston movement, the plunger 3 is rotated in the opposite direction by an arbitrary angle (arrow) and the passage 1 is rotated.
b, 3b pull the plunger 3 with the same passage open, and the raw material 8 mixed and melted and kneaded in the inner screw 2b is suction-filled in the accumulator chamber 5a of the nozzle 5. The key-type passage 1b by the structure and operation of the plunger 3, the nozzle 5 to obtain a switching operation action of blocking or open through the 3b, backflow from the cavity (not shown) becomes nil, furthermore the screw 2 itself Realized a structure that does not allow the piston to move.
【０００７】図３は、図２のプランジャー３のピストン
運動が下死点に有って通路１ｂ、３ｂが同通状態で開放
にあり同時にプランジャー３の一方向任意角度の正回動
と共に前記カギ状通路１ｂ、３ｂは同通された状態でピ
ストン運動の吸引工程が開始されたことに対して、プラ
ンジャー３のピストン運動が圧縮工程でカギ状の通路１
ｂ、３ｂが閉塞状態を示す略断面図である。ノズル５の
蓄圧室５ａの容積は、成形キャビテイ（図示せず）の容
積に応じた容積にするか又はプランジャー３のピストン
運動の増減をする。溶融された原材料８は二重スクリュ
ー２の外側スクリュー２ａ、通路２ｃ、内側スクリュー
２ｂを経由して開放状態のカギ状の通路１ｂ、３ｂを経
由してノズル５の蓄圧室５ａへ押し出し又は吸引され
る。該溶融の原材料８をプランジャー３の他方向任意角
度の逆回動と共にカギ状の通路１ｂ、３ｂが互い違いと
なって閉塞状態の儘、プランジャー３は圧縮工程に入り
ノズル５の蓄圧室５ａ内の該溶融された原材料８は高圧
射出が可能となる。FIG. 3 shows that the piston movement of the plunger 3 of FIG. 2 is at the bottom dead center and the passages 1b and 3b are open in the same state. While the suction process of the piston motion is started while the key-shaped passages 1b and 3b are in the same passage, the piston motion of the plunger 3 is the key-shaped passage 1 in the compression process.
3B is a schematic cross-sectional view showing a closed state. The volume of the pressure accumulating chamber 5a of the nozzle 5 is set according to the volume of the molding cavity (not shown) or the piston movement of the plunger 3 is increased or decreased. Pushed out raw materials 8 which is melted twin screw second outer scan click Liu 2a, the passage 2c, hooked passage 1b of the open state via the inner screw 2b, via 3b into accumulation chamber 5a of the nozzle 5 Or aspirated . When the melted raw material 8 is reversely rotated in the other direction by an arbitrary angle in the other direction, the key-shaped passages 1b and 3b are staggered to each other to be in a closed state, and the plunger 3 enters a compression process, and the pressure accumulating chamber 5a of the nozzle 5 is entered. The molten raw material 8 therein can be injected at high pressure.
【発明の効果】前記した様に、シリンダーの内側は同軸
状に一方向回動する二重スクリューを設けてシリンダー
の従前の長さを縮小し、プランジャーのピストン運動に
伴う任意角度正逆回動によってシリンダーとプランジャ
ーとに設けたカギ状の通路を開閉スイッチングさせ且つ
互い違いさせて溶融した原材料の射出の逆流防止開閉機
能を付与し、プランジャーのピストン運動で高圧射出を
可能として、シリンダーへの加熱とプランジャーへの加
熱とを同時に行って原材料の溶融を安定にし、それら機
能を持たせて射出成形機の精度の向上、装置の小型化の
効果を得た。As described above, the inside of the cylinder is provided with the double screw that rotates coaxially in one direction to reduce the conventional length of the cylinder and to rotate the plunger forward or backward at an arbitrary angle according to the piston movement of the plunger. The key-like passage provided in the cylinder and the plunger is opened and closed by the movement, and the backflow prevention opening / closing function of the injection of the melted raw material is alternately provided, and the piston movement of the plunger enables high-pressure injection. As a result, the heating of the cylinder and the heating of the plunger were simultaneously performed to stabilize the melting of the raw materials, and these functions were provided to improve the accuracy of the injection molding machine and reduce the size of the apparatus.
【図１】従前の一実施例の略断面図である。FIG. 1 is a schematic cross-sectional view of a conventional example.
【図２】本発明の一実施例の略断面図である。FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention.
【図３】本発明の一実施例の略断面図である。FIG. 3 is a schematic sectional view of an embodiment of the present invention.
１ シリンダー １ａ シリンダーヘッド部 １ｂ 通路 １ｃ ヘッド貫通部 ２ 二重スクリュー ２ａ 外側スクリュー ２ｂ 内側スクリュー ２ｃ 通路 ２ｄ スクリュー基部 ３ プランジャー ３ａ 先端分 ３ｂ 通路 ４ カートリッジヒーター ５ ノズル ５ａ 蓄圧室 ６ ヒーター ７ ホッパー ８ 原材料 ９ シリンダー ９ａ ノズル ９ｂ 穴 １０ スクリュー １１ ヒーター １２ ホッパー １３ 金型 １３ａ ホットランナー １４ 原材料 1 Cylinder 1a Cylinder Head Part 1b Passage 1c Head Penetration Part 2 Double Screw 2a Outer Screw 2b Inner Screw 2c Passage 2d Screw Base 3 Plunger 3a Tip Part 3b Passage 4 Cartridge Heater 5 Nozzle 5a Accumulation Chamber 6 Heater 7 Hopper 8 Raw Material 9 Cylinder 9a Nozzle 9b Hole 10 Screw 11 Heater 12 Hopper 13 Mold 13a Hot runner 14 Raw material
Claims (1)
リューと射出ノズルとを有した射出成形機に於いて、 シリンダーの内側は同軸状に一方向回動する二重スクリ
ューを設け、該シリンダーのヘッド部の貫通穴部分には
望所長さのノズルを結合して設けてそのシリンダーヘッ
ド部分の内壁にはカギ状の開口した通路を設けて、 該二重スクリューは一方向へ回動する筒の外周面と内周
面に互いに方向を異にする螺旋状の外側スクリューと内
側スクリューとが一体的構造を成して、その内側スクリ
ューの内側には往復ピストン運動と任意角度正逆回動を
するプランジャーを内蔵して設けて、 該プランジャーは加熱用カートリッジヒーターと該プラ
ンジャーの先端部分にカギ状の開口した通路とを設け
て、該プランジャーの先端部分は該望所長さのノズルに
結合したシリンダーヘッド部分の内周面に摺接しピスト
ン運動可能に設けて、 該プランジャーのピストン運動の下死点にて該シリンダ
ーとプランジャーに設けたそれらカギ状の通路は互いに
同通する様に位置して設け且つ該ピストン運動の吸引工
程でプランジャーの一方向任意角度の正回動と共に前記
カギ状通路は同通される様に設けて、該ピストン運動の
圧縮工程でプランジャーの他方向任意角度の逆回動と共
に前記カギ状の通路は遮断される様に設けて、 それらを構成したことを特徴とした成形機。1. An injection molding machine having an injection cylinder, an injection screw, and an injection nozzle of the injection molding machine, wherein the inside of the cylinder is provided with a double screw coaxially rotating in one direction, and the head of the cylinder. The desired length of the nozzle is connected to the through hole part of the part, and the inner wall of the cylinder head part is provided with a key-shaped open passage, and the double screw rotates in one direction. The outer and inner peripheral surfaces of the moving cylinder have a spiral outer screw and inner screw that have different directions from each other to form a unitary structure. A plunger that rotates is provided internally, and the plunger is provided with a heating cartridge heater and a passage having a key-like opening at the tip of the plunger, and the tip of the plunger is located at the desired position. To the difference between the nozzle
It is provided so as to be in sliding contact with the inner peripheral surface of the coupled cylinder head portion so that the piston can move. At the bottom dead center of the piston movement of the plunger, the key-like passages provided in the cylinder and the plunger are made to communicate with each other. Is provided so as to pass through the hook-shaped passage together with the positive rotation of the plunger in one direction at an arbitrary angle in the suction step of the piston movement, and the other side of the plunger is compressed in the compression step of the piston movement. A molding machine characterized in that the key-like passages are provided so as to be blocked by the reverse rotation at an arbitrary angle in the direction, and are constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19655192A JPH0745157B2 (en) | 1992-06-30 | 1992-06-30 | Molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19655192A JPH0745157B2 (en) | 1992-06-30 | 1992-06-30 | Molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06126792A JPH06126792A (en) | 1994-05-10 |
| JPH0745157B2 true JPH0745157B2 (en) | 1995-05-17 |
Family
ID=16359621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19655192A Expired - Fee Related JPH0745157B2 (en) | 1992-06-30 | 1992-06-30 | Molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745157B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5801754B2 (en) * | 2012-05-24 | 2015-10-28 | 三井化学株式会社 | Melting apparatus and injection molding apparatus |
-
1992
- 1992-06-30 JP JP19655192A patent/JPH0745157B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06126792A (en) | 1994-05-10 |
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