JPS59178232A - Supplier of raw material for injection molding - Google Patents

Supplier of raw material for injection molding

Info

Publication number
JPS59178232A
JPS59178232A JP5308683A JP5308683A JPS59178232A JP S59178232 A JPS59178232 A JP S59178232A JP 5308683 A JP5308683 A JP 5308683A JP 5308683 A JP5308683 A JP 5308683A JP S59178232 A JPS59178232 A JP S59178232A
Authority
JP
Japan
Prior art keywords
raw material
injection molding
hoppers
port
slide
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
Application number
JP5308683A
Other languages
Japanese (ja)
Inventor
Yuji Iida
祐次 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP5308683A priority Critical patent/JPS59178232A/en
Publication of JPS59178232A publication Critical patent/JPS59178232A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/18Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • B29C45/1858Changing the kind or the source of material, e.g. using a plurality of hoppers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/02Dispensing from vessels, e.g. hoppers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/10Feeding of the material to be moulded, e.g. into a mould cavity of several materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To effectively exchange many kinds of raw materials by a method in which a mobile body holding plural hoppers is set above the raw material supply port of an injection molding machine and a positioning mechanism for the raw material dropping port and raw material supply port of the hoppers and a close fitting mechanism are provided. CONSTITUTION:The centering of holes 13 is made and a slide base plate 9 is closely fitted to the raw material charging port 8 of the injection cylinder 6 of an injection molding machine. A slide 10 on which plural hoppers 1 charged with plural molding materials and purgers are fixed at equal intervals is set on the base plate 9 in a space-free reciprocally movable manner. In the slide 10, through holes 12 for positioning the hoppers 1 are matched with the reference hole 15 of the slide base plate 9 and positioning pins 16 are inserted into the holes, and thereby the dropping port of any hopper is matched with the raw material charging port 8. A dryer 2 for drying raw material pellets is also attached to each hopper 1. The exchanging of resins can be easily made to lessen the occurrence of trouble with quality of moldings.

Description

【発明の詳細な説明】 本発明は、プラスチックの射出成形用原料ペレット供給
用ホンパーに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hopper for supplying raw material pellets for plastic injection molding.

従来の射出成形用原料供給方式は射出成形機に1台のホ
ンバーが固定されているのが普通であり、ごく1れに複
数のホンバーが固定され、樹脂の切替に於いてパルプ又
は手動によシ通路切替を行う方法があった。
In the conventional raw material supply system for injection molding, one unit is usually fixed to the injection molding machine, but multiple units are fixed to each injection molding machine, and when changing the resin, pulp or manual input is required. There was a way to switch between channels.

射出成形機に1台の原料供給ホッパーが固定された方式
では原料切替において予め次に成形する原料を原料乾燥
器に投入しておく必要があシ、一方それまで成形しCい
た樹脂の残余をホンバーから抜きとり、史に射出成形機
シリンダー内部を洗浄するためにパージング材をホッパ
ー内に投入し、パージング射出を行った後、ホンバー内
の付着粉をとシ除くため清掃をし、その後予め乾燥して
おいた次の原料樹脂をホンバーに入れるという如く極め
て煩雑で時間と老力′の〃・かる工程であった。
In a system in which one raw material supply hopper is fixed to the injection molding machine, it is necessary to feed the raw material to be molded next into the raw material dryer in advance when switching raw materials. After removing the cylinder from the cylinder, put the purging material into the hopper to clean the inside of the cylinder of the injection molding machine. After performing purging injection, clean the cylinder to remove the powder inside the cylinder, and then dry it beforehand. It was an extremely complicated, time-consuming and energy-consuming process, as the next raw material resin that had been prepared had to be put into the hombar.

それに対して図1に示すように複数のホッパーが固定さ
れ通路切替によって原料を替える方法は上記の問題点を
改善する方法であるが次のような欠点がある。図におい
て1はホッパー、2はホンパー内の原料ベレット乾燥用
ドライヤー、6は原料切替用ゲート、4rriパイプ、
5は射出成形機シリンダーへの原料投入筒、611−i
射出成形機射出シリンダー、7はホンパー固定用ステイ
である。種類の異なる射出成形用ベレフトを各々ホンバ
ー1に入れ乾燥ドライヤー2によって乾燥し、成形しよ
うとする樹脂の入ったホンバー1の開閉ゲート6を開に
してその他の樹脂の入ったボンバーの開閉ゲートは閑に
することによって樹脂の切替ができる。上記方式の大き
な欠点は第一にホンバー1の落下口から、成形機射出シ
リンダーへの原料投入筒6を結ぶパイプ4の煩多1角1
4をできるだけ90゜に近くとるために複数ホ、ソバ−
1を水平方向に広く分散配置することが制限され、4台
程度の取りイづけが限度で“ある。父、原料投入筒5に
灯しホンバーを高くすれば傾斜角14を大きくでき取付
けるホンバー数を増すことができるがレイアウト上の難
点とホッパーへの材料投入の作業性の低下があり好まし
くない。第2の欠点はホンバー1の落し口から射出成形
機原料投入口8までの路程が長く、特に原料投入樹脂の
ベレットが付着し樹脂切替のたびVC異種粉末が混入し
成形品品質を低下させる。
On the other hand, as shown in FIG. 1, a method in which a plurality of hoppers are fixed and the raw materials are changed by switching paths is a method that improves the above problems, but has the following drawbacks. In the figure, 1 is a hopper, 2 is a dryer for drying raw material pellets in the hopper, 6 is a raw material switching gate, 4 rri pipes,
5 is a cylinder for introducing raw materials into the injection molding machine cylinder, 611-i
The injection cylinder of the injection molding machine, 7 is a stay for fixing the hamper. Put different types of injection molding berefts into the bomber 1 and dry them using the dryer 2. Open the gate 6 of the bomber 1 containing the resin to be molded, and leave the gates of the bombers containing other resins idle. The resin can be switched by The major disadvantage of the above method is that the pipe 4 connecting the drop port of the main bar 1 to the raw material injection cylinder 6 to the injection cylinder of the molding machine is complicated.
In order to make 4 as close to 90 degrees as possible, use multiple ho, soba.
1 can be widely distributed in the horizontal direction, and the maximum number of units that can be installed is about 4 units.Father, if you light the material input tube 5 and raise the unit height, you can increase the angle of inclination 14 and increase the number of units that can be installed. However, this is not preferable due to layout difficulties and a decrease in workability for charging materials into the hopper.The second drawback is that the path from the drop port of the hopper 1 to the raw material input port 8 of the injection molding machine is long; In particular, the pellets of raw material input resin adhere, and VC dissimilar powders are mixed in each time the resin is changed, reducing the quality of the molded product.

本発明は上記欠点を排し、多種の原料替えを迅速に、か
つ異種原料粉末の混入がなく供給原料が成形品品質に悪
影響を与えず、なおかつ原料づまp等のトラブルのない
確実な原料供給を実現することを目的とする。以下、図
面について詳細に説明する。
The present invention eliminates the above-mentioned drawbacks, allows for quick replacement of various types of raw materials, eliminates the mixing of different types of raw material powder, does not adversely affect the quality of the molded product, and ensures reliable raw material supply without problems such as raw material jamming. The purpose is to realize the following. The drawings will be described in detail below.

図2は本発明の一実施例である。また図6は図2の部分
断面図である。図に於いて射出成形機の射出リンダ−6
の原料投入口8にスライド基板9にあけられた穴15が
芯合わせされるようステイクを介してスライド基板9が
密着固定されている。
FIG. 2 is an embodiment of the present invention. 6 is a partial sectional view of FIG. 2. FIG. In the figure, the injection cylinder 6 of the injection molding machine
A slide substrate 9 is closely fixed to the raw material input port 8 of the slide substrate 9 via a stake so that a hole 15 made in the slide substrate 9 is aligned.

スライド基板?上を複数のホンバー、11が等間隔に固
定されたスライド10が往復自任にし炉も上下方向にす
きまなくスライドする。スライド10には位置決め用の
貫通穴12が等間隔にろり、スライド基板9にろけられ
た位置決め基準穴15と合致させ、位IL決めビン16
を押入することによって任意のホンバーの落丁口を射出
シリンダー6の原料投入口8上に合わせることか可能で
ある。各ホンバーには原料ベレット乾燥用のドライヤー
2が取、!lll+jけられその温#は各々独立にコン
トロール可能である。スライド4に取りつけられた複数
のホッパーには予定される成形樹脂をそれぞれ投入しそ
のうち一つのホソノ;−にはノく−ジング材を投入して
おく。成形中の製品機種を他に替える場合は、IJU 
f’1投入口8に合わされているホンノ(−1の開閉ゲ
ート5を押して原料ベレットの落下を停止し、位置決ビ
ン16を抜いてノクナジング材が投入されているホンバ
ーを原料投入口8上に移送し位置ビン16を差し込み位
置合わせをし、開閉ゲート3を開けばパージング材が原
料投入口8を通して射出シリンダー6内に図16に示す
如く落下していく。図6に於いて11は樹脂ベレットで
ある。
Slide board? A slide 10 with a plurality of honbars and 11 fixed at equal intervals on the top reciprocates freely, and the furnace also slides vertically without any gaps. Through holes 12 for positioning are formed in the slide 10 at equal intervals, and aligned with the positioning reference holes 15 formed in the slide board 9.
By pushing in, it is possible to align the droplet of any hopper with the raw material input port 8 of the injection cylinder 6. Each honbar has a dryer 2 for drying raw material pellets! The temperature of each temperature can be controlled independently. The desired molding resin is charged into a plurality of hoppers attached to the slide 4, and a molding material is placed into one of the hoppers. If you want to change the product model being molded to another one, please use the IJU
Push the opening/closing gate 5 of f'1 (-1) that is aligned with the f'1 input port 8 to stop the falling of the raw material pellet, pull out the positioning bottle 16, and place the bar containing the noknazing material onto the raw material input port 8. When the position bottle 16 is transferred and aligned, and the opening/closing gate 3 is opened, the purging material falls through the raw material inlet 8 into the injection cylinder 6 as shown in Fig. 16. In Fig. 6, 11 is a resin pellet. It is.

射出シリンダー6内の・く−リングが完了したら前述と
同様にして次に使用する樹脂が投入されているホンバー
を原料投入口8上にもってくればよい。
When the cooling in the injection cylinder 6 is completed, the hopper containing the resin to be used next is placed on the raw material inlet 8 in the same manner as described above.

父、17j S U本発明の他の実施例である。ロータ
リーアーム20が軸19全中心に回転出来軸19はステ
イタに固定芒才1ている。ロータリアーム20は多数の
アームをもちその先端はホンノ々−1がリング部にはめ
られ自在に上下動できるようなリング状に1つCお9図
5の如くビン19の一端がホッパーIK固定でれ、ビン
19はリング状部にあけられた長穴26を貝ぬき他端か
二方向)(ネロンク機構22に固定されることにより二
方向)くネロンク機構22を介してホソノく−1がロー
タリーアーム20のリング状部22に保持さ才りる。又
ロータリーアーム20の下面に半球状のへこみ27があ
りスライド基板2゛1に埋め込甘れ上下に可動な位置決
めビン28がノくネ29によって上方に押し出されへこ
み27に人シ込みC・−タリーアーム150回転位置を
決めることによってホンノく−1が射出シリンダー6へ
の原料投入口80銭上に来る。バネロンク・澄構22の
レノ(−24を解除しレバー25を押し下げることによ
りホソノ:−1の原料落下口が直接原料投入口8に押圧
さ扛る。
Father, 17j SU is another embodiment of the present invention. The rotary arm 20 can rotate about the entire center of the shaft 19, and the shaft 19 is fixed to the stator. The rotary arm 20 has a large number of arms, each of which is fitted into a ring at the tip and shaped like a ring so that it can move up and down freely.As shown in Figure 5, one end of the bin 19 is fixed to the hopper IK. Then, the bottle 19 is inserted through the long hole 26 drilled in the ring-shaped part to the other end (in two directions by being fixed to the neronk mechanism 22). It is held by the ring-shaped portion 22 of the arm 20. Further, there is a hemispherical recess 27 on the lower surface of the rotary arm 20, and a positioning pin 28, which is embedded in the slide board 2-1 and is movable up and down, is pushed upward by a knob 29, and a person enters the recess 27. By determining the rotational position of the tally arm 150, Honnoku-1 is placed above the raw material input port to the injection cylinder 6. By releasing the lever 24 of the spring lock 22 and pushing down the lever 25, the raw material fall port of the spring lock 22 is directly pressed against the raw material input port 8.

開閉ゲート5を開けばホンノ(−1内の樹脂ベレット1
1が芽J出シリンダー6内に落下する。樹脂替えなする
場合は1ず使用し−(いた樹脂の入ったホンバー1の開
閉ゲート5tl*lじ]くネロンク機構22のレバー2
5を引き上はレノ<−2’4’ir押せはホンバー1は
押し上げられ任意のホンノ(−を射出シリンダーの原料
投入口8の上にロータリーアーム20を回転させること
により移送することは可能である。
If you open the opening/closing gate 5, the resin pellet 1 in -1
1 falls into the sprouting cylinder 6. If you do not want to change the resin, first use the lever 2 of the lock mechanism 22.
5 is pulled up, it is possible to move the rotary arm 20 over the raw material input port 8 of the injection cylinder by rotating the rotary arm 20. be.

以上説明した本発明の方式によれば任意のホンパー1を
原料投入口(8の面上に持ってくるため原料ベレフトの
落下傾斜数が常に垂直にな、リホンバーの分散配置によ
る原料ベレフトの落下傾斜角の影#はない。その念め多
数のホッパーを成形機上に取p付は多種類の樹脂替えや
色替えがワンタンチで行えてしかも原料ベレフトの詰ま
シトラブルのない原料供給が実現できる。又、1ス3及
び図5に示すようにホンパー1の原料ベレント落し口1
7と射出シリンダーへの原料供給口8 i1ニスライド
基板9の入15ケ介するか又は、直接結合atシるため
樹脂替え前の付着残渣を残す箇所は最小限におさえられ
異種原料混入のない、完全な樹カ旨替えが行える。
According to the method of the present invention described above, since any desired hopper 1 is brought onto the surface of the raw material input port (8), the falling slope of the raw material right is always vertical, and the falling slope of the raw material right is always vertical due to the dispersed arrangement of the rehompers. There are no shadows from the corners.With this in mind, a large number of hoppers are installed on the molding machine, making it possible to change a wide variety of resins and colors in one click, and also to realize raw material supply without the trouble of clogging of the raw material left. In addition, as shown in 1st 3 and FIG.
7 and the raw material supply port 8 to the injection cylinder 15 Input of the Ni-Ride substrate 9 15 or directly bonded to each other, so the places where adhesion residue is left before the resin change is minimized, and there is no contamination of different raw materials. Complete tree layout can be changed.

近年家庭電気製品を妬め、日用品、工業機器装置の製品
のフラスチンク化は顕著でしかも外敵、機能共に多様化
が進み、成形製造業に於いても成形品機種の切替段取回
数の増加による成形機稼動率の低下という形で影響を受
けている。本発明を応用することにより頻繁な材料切替
に対し極めて短時間、少労力で対応でき、しかも材料切
替に伴なう品質トラブルもなくすことが可能である。又
本発明を展開し、前述の一連の操作を機械化し、マイコ
ン制御と結合させれは相料切替の全自動システム可能で
あり、金型交換、成形条件変更等を含めた成型切替段取
の全自動システムへの礎石としても本発明は大きな意義
がある。
In recent years, with the envy of household electrical appliances, the use of frustinized products in daily necessities and industrial equipment has become remarkable.Furthermore, external enemies and functions have become more diversified, and in the molding manufacturing industry, the number of setups for changing molded product models has increased, resulting in molding. The impact is in the form of a decline in machine availability. By applying the present invention, it is possible to cope with frequent material changes in an extremely short time and with little effort, and also to eliminate quality problems associated with material changes. Furthermore, by developing the present invention and mechanizing the above-mentioned series of operations and combining it with microcomputer control, it is possible to create a fully automatic system for phase changeover, which can be used to control molding changeover setups, including mold changes and changes in molding conditions. The present invention has great significance as a cornerstone for a fully automatic system.

【図面の簡単な説明】[Brief explanation of the drawing]

一11図は従来の複数ホンバー供給方式を示す図。 第2図は本発明の一実施例を示す図。第3図は第2図に
於ける部分断面図。第4図は本発明の他の実施例を示す
図。第5図は第4図に於ける部分断面図。 1・・・ホンパー   2・・・乾燥用ドライヤー6・
・・開閉ゲート  4・・・バイブ5・・原料投入筒 
 6・・・射出シリンダー7・・・ステイ 8・・・射出成形機への原料投入口 9・・・スライド基板   10・・・スライド11・
・・原料樹脂ペレフト 12・・・入15・・・穴  
      14・・・傾斜角15・・・位置決め基準
穴  16・・・位置決めピン17・・・ホッパ原料落
下口 19・・・軸20・・・ロータリーアーム 21
・・・スライド基板22・・・リング状部    26
・・・/(ネロンク機構24・・・レバー      
 25・・・レノ;−26・・・細長穴      2
7・・・半球穴2日・・・位置決めビン   29・・
・〕くネ以   上 第1図 第2■ // 162−
FIG. 111 is a diagram showing a conventional multiple phone supply system. FIG. 2 is a diagram showing an embodiment of the present invention. FIG. 3 is a partial sectional view of FIG. 2. FIG. 4 is a diagram showing another embodiment of the present invention. FIG. 5 is a partial sectional view of FIG. 4. 1... Homper 2... Dryer for drying 6.
・・Opening/closing gate 4・Vibe 5・・Raw material input tube
6... Injection cylinder 7... Stay 8... Raw material input port to the injection molding machine 9... Slide substrate 10... Slide 11.
...Raw material resin pellet 12...contains 15...holes
14... Inclination angle 15... Positioning reference hole 16... Positioning pin 17... Hopper raw material fall port 19... Axis 20... Rotary arm 21
... Slide board 22 ... Ring-shaped part 26
.../(Neronk mechanism 24... lever
25...Reno;-26...Elongated hole 2
7... Hemisphere hole 2 days... Positioning bottle 29...
・]Kune or more Figure 1 Part 2■ // 162-

Claims (1)

【特許請求の範囲】[Claims] 射出成形機の原料供給口上に可動体があり該可動体に複
数のホンバーが保持され、ホッパーの原料落し口と射出
成形機の原料供給口の芯合わせのための位置決め機構と
上述のホッパーの原料落し口と射出成形機の原料供給口
を密着固定させる機構を有することを特徴とする射出成
形用原料供給装置。
There is a movable body above the raw material supply port of the injection molding machine, and the movable body holds a plurality of hubs, and a positioning mechanism for aligning the raw material drop port of the hopper and the raw material supply port of the injection molding machine, and the raw material of the hopper described above. A raw material supply device for injection molding, characterized by having a mechanism for tightly fixing a drop port and a raw material supply port of an injection molding machine.
JP5308683A 1983-03-29 1983-03-29 Supplier of raw material for injection molding Pending JPS59178232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5308683A JPS59178232A (en) 1983-03-29 1983-03-29 Supplier of raw material for injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5308683A JPS59178232A (en) 1983-03-29 1983-03-29 Supplier of raw material for injection molding

Publications (1)

Publication Number Publication Date
JPS59178232A true JPS59178232A (en) 1984-10-09

Family

ID=12932969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5308683A Pending JPS59178232A (en) 1983-03-29 1983-03-29 Supplier of raw material for injection molding

Country Status (1)

Country Link
JP (1) JPS59178232A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200962A2 (en) * 1985-04-15 1986-11-12 Karl Hehl Injection-unit for a plastics injection-moulded machine
FR2608498A1 (en) * 1986-12-23 1988-06-24 Nicoll Raccords Plastiques Method and device for automatically changing the material supply and/or for purging on production equipment of the injection-moulding press type, for converting plastics and/or rubber
EP0335298A2 (en) * 1988-03-30 1989-10-04 Karl Hehl Plastic changing apparatus for a plastic injection unit
JPH039815U (en) * 1989-06-20 1991-01-30
JPH03100411U (en) * 1990-01-31 1991-10-21
CN112960291A (en) * 2021-02-26 2021-06-15 中国水利水电第九工程局有限公司 Discharge hopper for machine-made sand shell breaking, core keeping and desliming process
CN113843967A (en) * 2021-08-10 2021-12-28 金发科技股份有限公司 Automatic cleaning method and feeding cleaning system for injection molding machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200962A2 (en) * 1985-04-15 1986-11-12 Karl Hehl Injection-unit for a plastics injection-moulded machine
FR2608498A1 (en) * 1986-12-23 1988-06-24 Nicoll Raccords Plastiques Method and device for automatically changing the material supply and/or for purging on production equipment of the injection-moulding press type, for converting plastics and/or rubber
EP0335298A2 (en) * 1988-03-30 1989-10-04 Karl Hehl Plastic changing apparatus for a plastic injection unit
JPH039815U (en) * 1989-06-20 1991-01-30
JPH03100411U (en) * 1990-01-31 1991-10-21
CN112960291A (en) * 2021-02-26 2021-06-15 中国水利水电第九工程局有限公司 Discharge hopper for machine-made sand shell breaking, core keeping and desliming process
CN112960291B (en) * 2021-02-26 2022-08-19 中国水利水电第九工程局有限公司 Discharge hopper for machine-made sand shell breaking, core keeping and desliming process
CN113843967A (en) * 2021-08-10 2021-12-28 金发科技股份有限公司 Automatic cleaning method and feeding cleaning system for injection molding machine

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