JPH0564571B2 - - Google Patents
Info
- Publication number
- JPH0564571B2 JPH0564571B2 JP19029886A JP19029886A JPH0564571B2 JP H0564571 B2 JPH0564571 B2 JP H0564571B2 JP 19029886 A JP19029886 A JP 19029886A JP 19029886 A JP19029886 A JP 19029886A JP H0564571 B2 JPH0564571 B2 JP H0564571B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- thermal stability
- heat
- changing
- resistant
- 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
- 229920005989 resin Polymers 0.000 claims description 94
- 239000011347 resin Substances 0.000 claims description 94
- 238000010438 heat treatment Methods 0.000 claims description 23
- 229920006015 heat resistant resin Polymers 0.000 claims description 15
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 7
- -1 polyethylene Polymers 0.000 description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 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
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
（産業上の利用分野）
本発明は、射出成形機の樹脂替方法及び装置に
関するものである。
（従来の技術）
第３図は従来の射出成形機の側断面図を示し、
１は加熱シリンダ、２はスクリユ、３はバンドヒ
ータ、４は熱電対、５はノズル、６はホツパ、７
は温調計を示す。
さてホツパ６からの原料は、その自重によつて
加熱シリンダ１の内部１ａに落下し、スクリユ２
の回転により混練されつつ、その溝に沿つて加熱
シリンダ１の先端部１ｂに送られる。この際原料
は加熱シリンダ１の外周に装着されたバンドヒー
タ３によつて加熱されると共に、混練作用によつ
て発生する摩擦熱が加わつて内部からも温度が上
昇して溶融状態となり、加熱シリンダ１の先端部
１ｂに溶融樹脂が貯えられるにつれて、その反力
（背圧）によりスクリユ２は後方に押戻される。
この後退量を図示しないリミツトスイツチ等に
より感知し、スクリユ２の回転を設定位置で停止
させることにより射出量をきめる。この後図示し
ない金型が閉じられて射出工程に入る。この時、
図示しない油圧シリンダ（射出シリンダ）によつ
てスクリユ２に射出力が加えられ、同スクリユ２
は射出プランジヤとなつて、加熱シリンダ１の先
端部にあるノズル５により金型内に溶融樹脂を射
出する。またバンドヒータ３は３〜５個のグルー
プに分けられ、各グループ毎に加熱ゾーンを構成
し、各ゾーンに対応して熱電対４、温調計７があ
る。
近年、射出成形においても多種少量生産化が進
み、樹脂の種類の変更（以下樹脂替と呼ぶ）の頻
度が増加している。樹脂替は、一般に以下のよう
な方法によつている。
(1) ホツパ６内の樹脂を排出口６ａを用いて全て
抜き去る。
(2) 加熱シリンダ１内に残つている今までの樹脂
をスクリユの回転、射出を繰り返して抜き去
る。
(3) 新しい樹脂をホツパ６入れて、樹脂が変更す
るまでスクリユ回転、射出を繰り返す。
（発明が解決しようとする問題点）
射出成形機に使用される樹脂は、それぞれ異つ
た熱的特性を有し、また加熱シリンダ１の設定温
度も異なる。多数の樹脂のうち硬質塩化ビニー
ル、軟質塩化ビニール、難燃性ABS樹脂、難燃
性PS樹脂等は、成形温度と分解温度が非常に近
い熱安定性の悪い樹脂である。
これらの樹脂から、加熱シリンダ１の設定温度
がより高いポリカーボネート、ポリフエニレンス
ルフアイド、ポリエーテルイミド、耐熱ABS、
変性PPE等の耐熱性樹脂に樹脂替を行なうと、
シリンダ１の高温度により、熱安定性の悪い樹脂
が熱分解をおこして炭化物を生じる。この炭化物
はスクリユ及び加熱シリンダ内部に滞留するの
で、完全に排出するのが困難である。そのためス
クリユ２を抜き出して、清掃する手間が必要とな
る。
また炭化物の生成に気がつかずに、耐熱性樹脂
の成形を開始すると、成形品に炭化物が混入する
不具合を生ずる。また前記熱安定性の悪い樹脂の
熱分解の際、腐食性のハロゲン系ガスが生じるの
で、加熱シリンダ内部やスクリユを腐食させる問
題点があつた。
（問題点を解決するための手段）
本発明は前記従来の問題点を解決するために提
案されたもので、熱安定性の悪い樹脂から耐熱性
樹脂へ樹脂替するに際し、一旦同樹脂とほぼ同一
のシリンダ設定温度の熱安定性の良い暫定置換用
の樹脂に樹脂替を行なつてから、続いて耐熱性樹
脂に樹脂替するようにしてなるものであり、これ
を問題点解決のための手段とするものである。
また本発明は、熱安定性の悪い樹脂と耐熱性樹
脂を貯蔵するホツパと、暫定置換用の樹脂貯蔵装
置を設け、熱安定性の悪い樹脂から耐熱性樹脂に
切換える際、各樹脂に対応した加熱シリンダの温
度制御及び前記各樹脂の供給、停止等のシーケン
ス制御を行なう制御装置とからなるものであり、
これを問題点解決のための手段とするものであ
る。
（作用）
熱安定性の悪い樹脂と、加熱シリンダの設定温
度がほぼ同一のポリエチレン、ポリプロピレン、
ABS等の熱安定性の良い樹脂に樹脂替を行つた
後、加熱シリンダの設定温度を耐熱性樹脂に必要
な高い温度に昇温して、前記熱安定性の良い樹脂
から耐熱性樹脂へ樹脂替を行なう。
（実施例）
以下本発明を図面の実施例について説明する
と、第１図は本発明を実施する射出成形機を示
す。なお、図中１，１ａ，１ｂ，２，３，４，
５，６の各部分は前記第３図のものと同一である
ので、これらの詳細な説明は省略する。
ここで前記従来との相違点について説明する
と、１０は本発明の樹脂替方法を自動的に行なう
様に以下に述べる各装置を制御する制御装置、１
１はポリエチレン、ポリプロピレン、ABS等の
熱安定性の良い樹脂を入れる暫定置換用樹脂貯蔵
装置、１２，１３は樹脂の落下をON−OFF制御
する電磁弁やフイードスクリユ等からなる樹脂供
給装置、１４は樹脂落下孔である。
制御装置１０は第２図に示す様に以下の構成か
らなつている。即ち、操作パネル２０、樹脂供給
装置１２，１３の動作指令及び温度制御用CPU
２２及びスクリユ動作制御用CPU２３への動作
指令及びデータ転送を行なうメインCPU２１、
インターフエース２４，２５，２６から構成され
ている。
次に以上の如く構成された実施例について説明
すると、例えば熱安定性の悪い樹脂である難燃性
ABS樹脂の成形が終了すると、ホツパ６内の同
樹脂を排出口６ａより抜き去る。次に前記樹脂と
加熱シリンダの設定温度がほぼ同一で、熱安定性
の良い、例えばポリエチレン等の樹脂を暫定置換
用樹脂貯蔵１１に投入し、制御装置１０の操作パ
ネル２０から、樹脂替動作時間、樹脂替時のスク
リユ回転数、背圧、耐熱性樹脂である、例えば変
性PPE樹脂に適する加熱シリンダ設定温度を設
定する。
第１表は前記難燃性ABS樹脂と変性PPE樹脂
の加熱シリンダ設定温度の例を示す。
(Industrial Application Field) The present invention relates to a resin changing method and apparatus for an injection molding machine. (Prior art) Figure 3 shows a side sectional view of a conventional injection molding machine.
1 is a heating cylinder, 2 is a screw, 3 is a band heater, 4 is a thermocouple, 5 is a nozzle, 6 is a hopper, 7
indicates a temperature controller. Now, the raw material from the hopper 6 falls into the interior 1a of the heating cylinder 1 due to its own weight, and the raw material from the hopper 6 falls into the interior 1a of the heating cylinder 1.
While being kneaded by the rotation, the mixture is sent to the tip 1b of the heating cylinder 1 along the groove. At this time, the raw material is heated by the band heater 3 attached to the outer periphery of the heating cylinder 1, and the frictional heat generated by the kneading action is added to the raw material, causing the temperature to rise from the inside and become molten. As the molten resin is stored in the tip 1b of the screw 2, the reaction force (back pressure) pushes the screw 2 back. The amount of retraction is sensed by a limit switch (not shown) or the like, and the rotation of the screw 2 is stopped at a set position to determine the amount of injection. After this, the mold (not shown) is closed and the injection process begins. At this time,
An injection force is applied to the screw 2 by a hydraulic cylinder (injection cylinder) not shown, and the screw 2
The nozzle 5 serves as an injection plunger and injects molten resin into the mold through a nozzle 5 at the tip of the heating cylinder 1. Furthermore, the band heaters 3 are divided into three to five groups, each group forming a heating zone, and a thermocouple 4 and a temperature controller 7 are provided corresponding to each zone. In recent years, production of a wide variety of products in small quantities has progressed in injection molding, and the frequency of changing the type of resin (hereinafter referred to as "resin change") has increased. Resin replacement is generally performed by the following method. (1) Remove all the resin in the hopper 6 using the discharge port 6a. (2) Remove the resin remaining in the heating cylinder 1 by repeating the rotation and injection of the screw. (3) Put new resin into the hopper 6 and repeat the screw rotation and injection until the resin is changed. (Problems to be Solved by the Invention) Resins used in injection molding machines have different thermal properties, and the set temperature of the heating cylinder 1 also differs. Among the many resins, hard vinyl chloride, soft vinyl chloride, flame-retardant ABS resin, flame-retardant PS resin, etc. are resins with poor thermal stability, with molding temperatures and decomposition temperatures very close to each other. From these resins, polycarbonate, polyphenylene sulfide, polyetherimide, heat-resistant ABS,
When changing resin to heat-resistant resin such as modified PPE,
Due to the high temperature of the cylinder 1, the resin with poor thermal stability causes thermal decomposition to produce carbide. Since this carbide remains inside the screw and heating cylinder, it is difficult to completely discharge it. Therefore, it is necessary to take out the screw 2 and clean it. Furthermore, if molding of a heat-resistant resin is started without noticing the formation of carbides, a problem will occur in which carbides will be mixed into the molded product. Further, when the resin with poor thermal stability is thermally decomposed, corrosive halogen-based gas is generated, which causes the problem of corrosion of the inside of the heating cylinder and the screw. (Means for Solving the Problems) The present invention was proposed to solve the above-mentioned conventional problems, and when changing from a resin with poor thermal stability to a heat-resistant resin, it is necessary to The resin is changed to a temporary replacement resin with good thermal stability at the same cylinder set temperature, and then the resin is changed to a heat-resistant resin. It is a means. In addition, the present invention provides a hopper for storing resins with poor thermal stability and heat-resistant resins, and a resin storage device for temporary replacement, so that when switching from resin with poor thermal stability to heat-resistant resin, It consists of a control device that performs temperature control of the heating cylinder and sequence control such as supply and stop of each of the resins,
This is a means to solve problems. (Function) Resins with poor thermal stability and polyethylene, polypropylene, which have almost the same heating cylinder temperature setting.
After changing the resin to a resin with good thermal stability such as ABS, raise the temperature setting of the heating cylinder to the high temperature required for the heat-resistant resin, and change the resin from the resin with good thermal stability to the heat-resistant resin. Make a change. (Example) The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows an injection molding machine for carrying out the present invention. In addition, in the figure 1, 1a, 1b, 2, 3, 4,
Since each part 5 and 6 is the same as that shown in FIG. 3, detailed explanation thereof will be omitted. Here, to explain the difference from the conventional method, 10 is a control device for controlling each device described below so as to automatically carry out the resin changing method of the present invention;
Reference numeral 1 is a temporary replacement resin storage device for storing resins with good thermal stability such as polyethylene, polypropylene, ABS, etc. Reference numerals 12 and 13 are resin supply devices consisting of solenoid valves and feed screws that control the falling of resin on and off, and 14 is a resin supply device. This is a resin drop hole. As shown in FIG. 2, the control device 10 has the following configuration. That is, the operation panel 20, the CPU for operating commands and temperature control of the resin supply devices 12 and 13.
22 and a main CPU 21 that transfers operation commands and data to the screw operation control CPU 23;
It is composed of interfaces 24, 25, and 26. Next, to explain the embodiment configured as above, for example, flame retardant resin which is a resin with poor thermal stability
When the molding of the ABS resin is completed, the resin in the hopper 6 is removed from the discharge port 6a. Next, a resin such as polyethylene, which has almost the same set temperature of the resin and the heating cylinder and has good thermal stability, is put into the temporary replacement resin storage 11, and from the operation panel 20 of the control device 10, the resin replacement operation time is determined. , the screw rotation speed when changing the resin, the back pressure, and the heating cylinder temperature setting suitable for heat-resistant resin, such as modified PPE resin. Table 1 shows examples of heating cylinder temperature settings for the flame-retardant ABS resin and modified PPE resin.
【表】
次いで変性PPE樹脂をホツパ６に入れて、操
作パネル２０のスイツチにより樹脂替動作開始信
号を出力する。次に開始信号をメインCPU２１
が入力すると、樹脂供給装置１３に指令信号を出
力して、暫定置換用樹脂貯蔵装置１１内のポリエ
チレンを樹脂落下孔１４を経て、加熱シリンダ１
の内部１ａへ供給する。
メインCPU２１からCPU２３へ指令信号が出
力されると、CPU２３は図示しないスクリユ駆
動装置により、スクリユの回転、射出を繰り返
す。これにより難燃性ABS樹脂からポリエチレ
ン樹脂に樹脂替される。次いで前記スクリユ動作
時間が樹脂替動作時間に到達すると、メイン
CPU２１はCPU２３へ指令信号を出力し、前記
スクリユ動作及び樹脂供給装置１３を停止させ
る。
次にメインCPU２１から第１表に示す様な変
性PPE樹脂の設定温度指令信号をCPU２２へ出
力する。CPU２２は熱電対４の検出温度と前記
設定温度と比較して、加熱シリンダ１の温度が変
性PPE樹脂の設定温度になる様にバンドヒータ
３を制御する。次いで加熱シリンダ１の温度が、
変性PPE樹脂設定温度に到達すると、CPU２２
は、メインCPU２１へ昇温完了信号を出力する。
次に前記信号を入力するとメインCPU２１は、
樹脂供給装置１２へ指令し、ホツパ６の変性
PPE樹脂を加熱シリンダ１の内部１ａへ供給す
る。
メインCPU２１の指令により、CPU２３は図
示しないスクリユ駆動装置によりスクリユ回転、
射出を繰り返し、ポリエチレン樹脂から変性
PPE樹脂へ樹脂替される。また前記動作時間が
樹脂替動作時間に到達すると、メインCPU２１
の指令により、樹脂供給装置１２及びスクリユ回
転、射出が停止する。
なお、樹脂替動作時間を設定するかわりに、暫
定置換用樹脂貯蔵装置１１及びホツパ６の内部に
図示しないレベル計を設け、樹脂替において、同
レベル計の検出する暫定置換用貯蔵装置１１及び
ホツパ６内の樹脂の高さが、予め設定した高さま
で減少すると、各樹脂替動作が終了したと、制御
装置１０内のメインCPU２１が判断する樹脂替
装置としてもよい。
（発明の効果）
以上詳細に説明した如く本発明は構成されてお
り、熱安定性の良い樹脂に樹脂替を行なつてか
ら、加熱シリンダの温度を上げて耐熱性樹脂に樹
脂替するので、熱安定性の悪い樹脂の熱分解によ
る炭化物の混入等の成形不良や、可塑化装置の腐
食等を解決できる。また自動的に熱安定性の悪い
樹脂から耐熱性樹脂に樹脂替ができるので、生産
性が向上する。[Table] Next, the modified PPE resin is put into the hopper 6, and a switch on the operation panel 20 outputs a resin change operation start signal. Next, send the start signal to the main CPU21
When inputted, a command signal is output to the resin supply device 13, and the polyethylene in the temporary replacement resin storage device 11 is transferred to the heating cylinder 1 through the resin drop hole 14.
is supplied to the interior 1a of the When a command signal is output from the main CPU 21 to the CPU 23, the CPU 23 repeats the rotation and injection of the screw using a screw driving device (not shown). As a result, the flame-retardant ABS resin is replaced with polyethylene resin. Next, when the screw operation time reaches the resin change operation time, the main
The CPU 21 outputs a command signal to the CPU 23 to stop the screw operation and the resin supply device 13. Next, the main CPU 21 outputs a set temperature command signal for the modified PPE resin as shown in Table 1 to the CPU 22. The CPU 22 compares the temperature detected by the thermocouple 4 with the set temperature, and controls the band heater 3 so that the temperature of the heating cylinder 1 becomes the set temperature of the modified PPE resin. Next, the temperature of the heating cylinder 1 is
When the modified PPE resin temperature reaches the set temperature, the CPU22
outputs a temperature rise completion signal to the main CPU 21.
Next, when the above signal is input, the main CPU 21
Command the resin supply device 12 to modify the hopper 6
PPE resin is supplied to the inside 1a of the heating cylinder 1. In response to a command from the main CPU 21, the CPU 23 rotates the screw using a screw drive device (not shown).
Modified from polyethylene resin by repeated injection
The resin was changed to PPE resin. Furthermore, when the operating time reaches the resin changing operating time, the main CPU 21
In response to this command, the resin supply device 12, screw rotation, and injection are stopped. In addition, instead of setting the resin change operation time, a level meter (not shown) is provided inside the temporary replacement resin storage device 11 and the hopper 6, and when changing the resin, the temporary replacement storage device 11 and the hopper detected by the level meter are set. The resin changing device may be configured such that the main CPU 21 in the control device 10 determines that each resin changing operation has been completed when the height of the resin in the resin inside 6 decreases to a preset height. (Effects of the Invention) The present invention is configured as described in detail above, and the resin is changed to a resin with good thermal stability, and then the temperature of the heating cylinder is raised to change the resin to a heat-resistant resin. This can solve problems such as molding defects such as the inclusion of carbides due to thermal decomposition of resins with poor thermal stability, and corrosion of plasticizing equipment. Furthermore, since the resin can be automatically changed from a resin with poor thermal stability to a heat-resistant resin, productivity is improved.
第１図は本発明の実施例を示す射出成形機の制
御装置を付加した側断面図、第２図は同制御装置
のブロツク図、第３図は従来の射出成形機の側断
面図である。
図の主要部分の説明、６……ホツパ、１０……
制御装置、１１……暫定置換用樹脂貯蔵装置、１
２，１３……樹脂供給装置、１４……樹脂落下
孔。
Fig. 1 is a side sectional view of an injection molding machine according to an embodiment of the present invention with a control device added thereto, Fig. 2 is a block diagram of the same control device, and Fig. 3 is a side sectional view of a conventional injection molding machine. . Explanation of the main parts of the diagram, 6...hotspa, 10...
Control device, 11...Temporary replacement resin storage device, 1
2, 13...Resin supply device, 14...Resin drop hole.
Claims (1)
するに際し、一旦同樹脂とほぼ同一のシリンダ設
定温度の熱安定性の良い暫定置換用の樹脂に樹脂
替を行なつてから、続いて耐熱性樹脂に樹脂替す
ることを特徴とする射出成形機の樹脂替方法。 ２ 熱安定性の悪い樹脂と耐熱性樹脂を貯蔵する
ホツパと、暫定置換用の樹脂貯蔵装置を設け、熱
安定性の悪い樹脂から耐熱性樹脂に切換える際、
各樹脂に対応した加熱シリンダの温度制御及び前
記各樹脂の供給、停止等のシーケンス制御を行な
う制御装置とからなることを特徴とする射出成形
機の樹脂替装置。[Scope of Claims] 1. When changing the resin from a resin with poor thermal stability to a heat-resistant resin, first change the resin to a temporary replacement resin with good thermal stability and a cylinder set temperature that is almost the same as the same resin. A method for changing resin in an injection molding machine, which comprises changing the resin to a heat-resistant resin. 2. Provide a hopper for storing resins with poor thermal stability and heat-resistant resins, and a resin storage device for temporary replacement, when switching from resin with poor thermal stability to heat-resistant resin.
A resin changing device for an injection molding machine, comprising a control device that performs temperature control of a heating cylinder corresponding to each resin and sequence control such as supply and stop of each resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19029886A JPS6347117A (en) | 1986-08-13 | 1986-08-13 | Method for changing resin in injection molder and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19029886A JPS6347117A (en) | 1986-08-13 | 1986-08-13 | Method for changing resin in injection molder and device therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6347117A JPS6347117A (en) | 1988-02-27 |
| JPH0564571B2 true JPH0564571B2 (en) | 1993-09-14 |
Family
ID=16255836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19029886A Granted JPS6347117A (en) | 1986-08-13 | 1986-08-13 | Method for changing resin in injection molder and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6347117A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19858672A1 (en) * | 1998-12-18 | 2000-06-21 | Basf Ag | Composition for cleaning plastics processing equipment, especially injection molding machines comprises high melting thermoplastic particles in a lower-melting thermoplastic polymer |
| KR20010110904A (en) * | 2000-06-09 | 2001-12-15 | 목광원 | Apparatus for manufacturing corner support frame which prevents bed spring from sagging down |
| JP6068389B2 (en) * | 2014-05-19 | 2017-01-25 | 日精樹脂工業株式会社 | Purge method for injection molding machine |
| CN105415576A (en) * | 2015-12-15 | 2016-03-23 | 长春富维—江森自控汽车饰件系统有限公司 | Discharging method for microcellular foam injection molding technology |
-
1986
- 1986-08-13 JP JP19029886A patent/JPS6347117A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6347117A (en) | 1988-02-27 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |