JP2003285330A - Metering and supplying method for resin material and metering and supplying apparatus therefor - Google Patents
Metering and supplying method for resin material and metering and supplying apparatus thereforInfo
- Publication number
- JP2003285330A JP2003285330A JP2002093390A JP2002093390A JP2003285330A JP 2003285330 A JP2003285330 A JP 2003285330A JP 2002093390 A JP2002093390 A JP 2002093390A JP 2002093390 A JP2002093390 A JP 2002093390A JP 2003285330 A JP2003285330 A JP 2003285330A
- Authority
- JP
- Japan
- Prior art keywords
- resin material
- tank
- metering
- resin
- hopper
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/287—Raw material pre-treatment while feeding
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、ペレット状の樹脂
材料を乾燥保管するホッパタンク内の残量が、たとえ少
なくなってもその計量吐出精度に支障がない樹脂材料の
計量供給方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin material measuring method and apparatus which does not hinder the metering and discharging accuracy even if the remaining amount in a hopper tank for drying and storing pelletized resin material is small. .
【0002】[0002]
【従来の技術】従来、図2に示しているがペレット状の
樹脂材料を乾燥保管するホッパタンク3の底部に、計量
排出出来る回転計量弁5の吸入口を直接連結して、その
吐き出し口を樹脂輸送管42に連結して樹脂材料Pを計
量供給する構成で用いられている。2. Description of the Related Art Conventionally, as shown in FIG. 2, a suction port of a rotary metering valve 5 capable of metering and discharging is directly connected to the bottom of a hopper tank 3 for drying and storing pelletized resin material, and the discharge port thereof is made of resin. It is used in a configuration in which the resin material P is metered and supplied by being connected to the transportation pipe 42.
【0003】この際に、ホッパタンクへは、ペレット状
の樹脂材料をほぼ100%レベルに投入して乾燥させた
状態で成形機に計量供給し、この樹脂材料を消費して減
量すると100%レベルから予め設けた設定時間の後、
100%レベルまで追加投入する制御で、従って常時1
00%レベルの樹脂材料を保有する方法であった。At this time, a pelletized resin material is put into the hopper tank at a level of almost 100%, and is dried and then metered to the molding machine. After the preset time set in advance,
It is a control to add up to 100% level, so it is always 1
It was a method of holding a resin material at a level of 00%.
【0004】[0004]
【発明が解決しようとする課題】しかし前述の方法で
は、樹脂成形品の色や材種を切り換える生産段取り替え
の際には、ホッパータンク内のほぼ100%レベルの多
量の残材料を抜き取り、新たに入れ替えする手間とムダ
を要していた。However, according to the above-mentioned method, a large amount of the remaining material of almost 100% level in the hopper tank is extracted at the time of the production setup change to change the color and material type of the resin molded product, and a new It took a lot of time and effort to replace it with.
【0005】というのは、図2の従来図に示しているよ
うにホッパータンク3内の残材料が少なくなると、ホッ
パタンク3内に吹き込まれる乾燥空気の流れによって、
残材料の下方への排出流れが、図3に示す様に熱風吹き
出し口23から吹き出す乾燥空気の上方への巻き上げ流
れで阻害される。This is because, as shown in the conventional diagram of FIG. 2, when the remaining material in the hopper tank 3 becomes small, the flow of dry air blown into the hopper tank 3 causes
The downward discharge flow of the residual material is obstructed by the upward flow of the dry air blown out from the hot air outlet 23 as shown in FIG.
【0006】この事から、回転計量弁の吸入口への材料
の流れが悪くなりムラが発生し、その結果、回転計量弁
の吐出量が乱れて計量精度が悪化する問題があり、ホッ
パータンク内には常時、多量の材料を保持しておく必要
があった。As a result, the flow of material to the suction port of the rotary metering valve becomes poor and unevenness occurs. As a result, there is a problem that the discharge amount of the rotary metering valve is disturbed and the metering accuracy deteriorates. It was necessary to hold a large amount of material at all times.
【0007】この様にホッパータンク内には常時、目一
杯の材料が貯蔵されている。一方、生産運転では多種少
量を効率的に行う必要があり、このことからタンク内の
材料の入れ替えの効率向上が求められた。In this way, the hopper tank always stores the maximum amount of material. On the other hand, in the production operation, it is necessary to efficiently carry out various kinds of small amounts, which requires improvement of the efficiency of material replacement in the tank.
【0008】本発明の目的は、このように繰り返される
段取り替え時に、その都度ホッパータンク内の多量の残
材料を抜き取らねば成らない問題点を改善するものであ
り、このタンク内の残量を少なくしても計量精度に支障
がない樹脂材料の計量供給方法及び樹脂材料の計量供給
装置を提供することにある。An object of the present invention is to improve the problem that a large amount of residual material in the hopper tank has to be extracted each time such a repeated setup change is performed, and the residual amount in the tank is reduced. Even if it does not hinder measurement accuracy even if it aims at providing the measuring method of the resin material and the measuring apparatus of the resin material.
【0009】[0009]
【課題を解決するための手段】請求項1の樹脂材料の計
量供給方法は、熱風をホッパタンク内に吹き込んで樹脂
材料を乾燥保管して小出し計量供給する樹脂材料の計量
供給方法において、材料切り替えまでの所要量を前もっ
てホッパータンクに投入し、材料切り換えまで樹脂材料
を追加しないで消費減量させて材料切り換え時のタンク
内の残量を少なくすることを特徴としたものである。According to a first aspect of the present invention, there is provided a resin material measuring and feeding method, wherein hot air is blown into a hopper tank to dry and store the resin material, and the small amount is dispensed. It is characterized in that the required amount is charged into the hopper tank in advance, and the amount of consumption is reduced without adding the resin material until the material is changed to reduce the remaining amount in the tank when the material is changed.
【0010】これによれば、段取り替え時にはホッパタ
ンク内の投入樹脂材料が殆ど消費されてしまい、ホッパ
タンク内の樹脂材料の入れ替えに当たり、抜き取り残量
が最小に出来て、また樹脂の乾燥量が最小に出来る。According to this, most of the resin material charged in the hopper tank is consumed at the time of setup change, and when the resin material in the hopper tank is replaced, the remaining amount of extraction can be minimized and the amount of resin dried can be minimized. I can.
【0011】請求項2の樹脂材料の計量供給装置は、成
形機に供給する樹脂を乾燥させて保管するホッパータン
クと、前記ホッパータンク排出口に連結されそのタンク
内の残留樹脂を収容させる収容タンクと、前記収容タン
クの底部にその樹脂吸い込み口を接続しその吐き出し口
を樹脂輸送管へ連結した回転計量弁と、を少なくとも備
えて成ることを特徴としている。According to a second aspect of the present invention, there is provided a resin material measuring and feeding device, wherein a hopper tank for drying and storing the resin to be supplied to the molding machine and a storage tank connected to the hopper tank discharge port for storing the residual resin in the tank. And a rotary metering valve in which the resin suction port is connected to the bottom of the storage tank and the discharge port is connected to the resin transport pipe.
【0012】これによれば、樹脂材料の残量が少なくな
ってホッパタンクの底部で乾燥空気の流れに阻害され
て、その流下時間がかかっても、間欠的に回転計量する
計量停止の合間に下方の収容タンクに流下して収容タン
クを満たしているから回転計量弁の吸入効率の低下バラ
ツキを阻止できる。依って少ない残量でも計量精度を損
なうことがなくなる。[0012] According to this, even if the flow rate of the dry air is obstructed at the bottom of the hopper tank due to the small amount of the resin material remaining, and even if it takes a long time for the flow of the dry air, the resin material is intermittently rotated downward during the measurement stoppage. Since it flows down to the storage tank and the storage tank is filled with the storage tank, it is possible to prevent variations in the suction efficiency of the rotary metering valve from decreasing. Therefore, even if the remaining amount is small, the weighing accuracy is not impaired.
【0013】請求項3の樹脂材料の計量供給装置は、請
求項2において、前記収容タンクが、その壁面に乾燥後
の空気排気壁を有している。これによれば、ホッパタン
ク内の底部での乾燥空気流れを下方にある収容タンクへ
誘引する事で、残材料の乾燥条件が最後まで維持でき
る。According to a third aspect of the present invention, in the resin material measuring and feeding device according to the second aspect, the storage tank has an air exhaust wall after drying on a wall surface thereof. According to this, the dry air flow at the bottom of the hopper tank is guided to the storage tank below, so that the drying condition of the residual material can be maintained until the end.
【0014】請求項4の樹脂材料の計量供給装置は、請
求項2又は3において、前記収容タンクが、その内部の
樹脂材料の有無を検出する検出手段を備えている。これ
によれば、ホッパタンクの残材料が全て下方の収容タン
クに収容されるから、ホッパタンクの下限レベルをより
確実に捉えることが出来る。またホッパタンク内での材
料のブリッジも解消できる。According to a fourth aspect of the present invention, there is provided a resin material measuring and feeding device according to the second or third aspect, wherein the storage tank is provided with a detecting means for detecting the presence or absence of the resin material therein. According to this, all the remaining material of the hopper tank is stored in the storage tank below, so that the lower limit level of the hopper tank can be more reliably grasped. In addition, the material bridge in the hopper tank can be eliminated.
【0015】請求項5の樹脂材料の計量供給装置は、請
求項2〜4において、前記収容タンクがその内部の樹脂
材料を外部に排出する抜き口を備えてある。これによれ
ば、末端の空間から抜き取れるから、タンク内の残材量
を1箇所から簡単に確実に排出できる。According to a fifth aspect of the present invention, there is provided the resin material measuring and feeding device according to the second to fourth aspects, wherein the storage tank is provided with an outlet for discharging the resin material inside thereof. According to this, since it can be extracted from the space at the end, the amount of residual material in the tank can be easily and reliably discharged from one location.
【0016】[0016]
【発明の実施の形態】本発明の樹脂材料の計量供給方法
及び樹脂材料の計量供給装置の一実施形態について、図
1には樹脂材料の計量供給装置を示す概念図を、図2に
はホッパタンク3内の投入レベル高さ方向における貯蔵
重量を示した従来方式の装置の説明図を、図3にはホッ
パタンク内の樹脂材料の残量が減少して乾燥用の熱風で
上方に巻き上げられる状況を示す図を、図4は樹脂材料
の計量供給装置の作動内容を示すフローチャート図を、
参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram showing a resin material measuring and supplying device, and FIG. 2 is a hopper tank regarding an embodiment of the resin material measuring and supplying method and the resin material measuring and supplying device of the present invention. Fig. 3 is an explanatory view of the conventional system showing the storage weight in the height direction of the charging level in Fig. 3, and Fig. 3 shows the situation in which the residual amount of the resin material in the hopper tank is reduced and it is wound up by hot air for drying. FIG. 4 is a flow chart showing the operation contents of the resin material metering and feeding device,
It will be described with reference to FIG.
【0017】本発明の樹脂材料の計量供給装置1につい
て、先ずその機能から説明する。ペレット状の樹脂材料
Pを押出機で可塑化し成形型に注型して、その成形型で
賦形されて樹脂成形品が製造される。この成形機に用い
られるペレット状の樹脂材料Pは、コンテナから受入口
に投入して空気輸送し本発明に係わる樹脂材料の計量供
給装置1の材料吸込み管29を介して投入される。The function of the resin material metering and supplying apparatus 1 of the present invention will be described first. The resin material P in pellet form is plasticized by an extruder, cast into a molding die, and shaped by the molding die to produce a resin molded product. The pelletized resin material P used in this molding machine is introduced into the receiving port from the container, pneumatically conveyed, and introduced through the material suction pipe 29 of the resin material measuring and feeding device 1 according to the present invention.
【0018】投入されたペレット状の樹脂材料Pは、樹
脂材料の計量供給装置1のホッパタンク3で、貯蔵され
熱風に曝されて樹脂材料P中の含水率を減じて乾燥状態
で保管される。これによって、成形される樹脂成型不良
の発生を防止している。The pelletized resin material P is stored in the hopper tank 3 of the resin material metering and feeding apparatus 1 and is exposed to hot air to reduce the water content in the resin material P and is stored in a dry state. This prevents the occurrence of defective resin molding.
【0019】この様にホッパタンク3内で乾燥された樹
脂材料Pは、乾燥状態を維持しながらタンク下方に流下
して回転計量弁5の吸入口から弁体内部の回転羽根の羽
根間に流れ込んでこの空間容積に詰められて計量し半回
転して下方位置に開口した排出口に連結した材料輸送管
42に吐き出すことによって、この材料輸送管42を延
設して成形機に送られ成型機用ホッパタンク51に備え
られた材料吸入部19に投入されるものである。The resin material P thus dried in the hopper tank 3 flows down below the tank while maintaining the dry state and flows from the suction port of the rotary metering valve 5 into the space between the blades of the rotary blades inside the valve body. This space transport volume 42 is extended and sent to the molding machine by being filled in this space volume, measured, half-turned, and discharged to the material transport tube 42 connected to the discharge port opened at the lower position. The material is introduced into the material suction unit 19 provided in the hopper tank 51.
【0020】次に、本発明の樹脂材料の計量供給装置1
の構成について、図1を用いて説明する。先ず樹脂材料
Pを貯蔵し乾燥させるホッパータンク3と、このホッパ
ータンクの底部に装着された本発明の収容タンク4と、
このタンクに吸入口を接続して樹脂材料Pを計量排出す
る回転計量弁5とから構成されている。Next, the resin material measuring and feeding device 1 of the present invention
The configuration will be described with reference to FIG. First, a hopper tank 3 for storing and drying the resin material P, a storage tank 4 of the present invention mounted on the bottom of the hopper tank,
It is composed of a rotary metering valve 5 for connecting the suction port to this tank and metering and discharging the resin material P.
【0021】続いて、この構成要素ごとに個別に、図1
を用いて説明する。先ずホッパータンク3は、タンク頂
部に材料投入部18と、タンク外に設置した熱風発生器
22に連結してタンク内に設置した熱風吹出管21と、
タンク底部に備えた材料排出口7とから構成されてい
る。Subsequently, each of the components is individually shown in FIG.
Will be explained. First, the hopper tank 3 includes a material charging unit 18 at the top of the tank, a hot air blower pipe 21 installed inside the tank by being connected to a hot air generator 22 installed outside the tank,
It is composed of a material discharge port 7 provided at the bottom of the tank.
【0022】先ず材料投入部18は、下方に円錐形を成
した缶体で出来たサイクロン24A筒から成り、筒上部
の吸気管32Aとバグフィルタ27を介して吸引ブロア
28にて吸引出来て、筒底部には投入弁25Aを設けて
ホッパタンク3上に連結してあり、サイクロン24A筒
に、この外周の接線方向から材料吸込み管29が接続し
てある。First, the material feeding section 18 is composed of a cyclone 24A cylinder made of a can body having a conical shape downward, and can be sucked by a suction blower 28 via an intake pipe 32A at the upper portion of the cylinder and a bag filter 27. A supply valve 25A is provided at the bottom of the cylinder and is connected to the hopper tank 3, and a material suction pipe 29 is connected to the cyclone 24A cylinder from the tangential direction of the outer circumference.
【0023】従って、投入弁25Aを閉じて、吸引ブロ
ア28を作動させるとサイクロン24A筒内が減圧状態
になり材料吸込み管29を介して、吸入空気と樹脂材料
Pがサイクロン24A筒内に吸い上げられて遠心分離さ
れて樹脂材料Pはサイクロン24A筒内に貯まる。上限
に達すると吸引ブロア28を停止して投入弁25Aを開
けてホッパタンク3へ樹脂材料Pを投入出来る。Therefore, when the closing valve 25A is closed and the suction blower 28 is operated, the inside of the cyclone 24A cylinder is depressurized, and the intake air and the resin material P are sucked up into the cyclone 24A cylinder through the material suction pipe 29. Then, the resin material P is centrifuged and stored in the cylinder of the cyclone 24A. When the upper limit is reached, the suction blower 28 is stopped, the injection valve 25A is opened, and the resin material P can be injected into the hopper tank 3.
【0024】続いて、ホッパタンク3外に設置した熱風
発生器22に連結してタンク内に設置した熱風吹出管2
1は、材料排出口7に向かって材料が停滞しないように
壁面を傾斜させたホッパタンク3の内面との間に層状に
樹脂が流下する隙間を設けてこの間に図中に矢印で示し
てある様に熱風を吹き出して樹脂材料を均等に加熱出来
る。熱風は一旦タンク内の上部に回流しながら下方のタ
ンク底部の材料排出口7から収容タンク4に入り、排気
壁11から排気される。Subsequently, the hot air blowing pipe 2 installed inside the hopper tank 3 is connected to the hot air generator 22 installed inside the tank.
No. 1 has a gap between the inner surface of the hopper tank 3 whose wall surface is inclined so that the material does not stagnate toward the material discharge port 7 and in which a layer of resin flows down, as indicated by the arrow in the figure. Hot air can be blown to the resin material to heat it evenly. The hot air once flows into the upper part of the tank, enters the storage tank 4 through the material discharge port 7 at the bottom of the lower tank, and is exhausted from the exhaust wall 11.
【0025】次に、以上のホッパータンク3の底部に装
着された本発明の収容タンク4について、図1を用いて
詳述する。収容タンク4の容量は、成形機への1回の送
り量を目安にしたサイズで形成してあり上下面にそれぞ
れ接続フランジを設けてありこのフランジ間の胴体部を
拡張する事で内部容積が確保出来る形状で作製してあ
り、その拡張壁部は材料の停滞を起こさないように上下
面を傾斜面で構成してある。Next, the storage tank 4 of the present invention mounted on the bottom of the hopper tank 3 will be described in detail with reference to FIG. The capacity of the storage tank 4 is formed in a size based on a single feed amount to the molding machine, and connecting flanges are provided on the upper and lower surfaces, respectively, and the internal volume is expanded by expanding the body portion between the flanges. It is manufactured in a shape that can be secured, and the upper and lower surfaces of the expansion wall portion are configured with inclined surfaces so as not to cause material stagnation.
【0026】次いで、この収容タンク4には、本発明に
係わる空気排気壁11と、材料検出手段13と、樹脂材
料抜き取り口15とが設けてある。図1に示す様に、先
ず空気排気壁11は、収容タンク4のフランジ間の胴体
部の外面を部分的に切り抜いて、ペレット状の樹脂材料
は通さない小穴をあけたパンチング板を蓋にして被せて
構成し、ホッパタンク3内に押し込まれて暴露された後
の排熱風を排気できる通気口にしてある。Next, the storage tank 4 is provided with an air exhaust wall 11 according to the present invention, a material detecting means 13, and a resin material extracting port 15. As shown in FIG. 1, first, the air exhaust wall 11 is formed by partially cutting out the outer surface of the body portion between the flanges of the storage tank 4 and using a punching plate with a small hole through which a pellet-shaped resin material does not pass as a lid. The air vent is configured so as to cover and is configured to vent the exhaust hot air after being exposed by being pushed into the hopper tank 3.
【0027】続いて材料の有無検出手段13は、タンク
4内に回転羽根を挿入し羽根回転を遮る樹脂材料が無く
なることで検出出来る粉体用レベル計が用いてある。Subsequently, as the material presence / absence detecting means 13, a powder level meter is used which can be detected by inserting a rotary blade into the tank 4 and eliminating the resin material blocking the rotation of the blade.
【0028】更に樹脂材料の抜き取り口15は、収容タ
ンク4の下方の傾斜部に雌ネジ短管を取り付けてプラグ
ねじ込み接続口としてあり、プラグを外してホース前端
に漏斗を設けた抜取り用のホース治具で抜き取り材料を
回収容器に収容でき、材料の入れ替えが簡便に出来る。Further, the extraction port 15 for the resin material has a female screw short pipe attached to the lower inclined portion of the storage tank 4 as a plug screw connection port, and the extraction hose is provided with a funnel at the front end of the hose by removing the plug. The material extracted by the jig can be stored in the collection container, and the material can be easily replaced.
【0029】次に、上述の収容タンク4の下面に、その
吸入口を接続して樹脂材料Pを計量排出する回転計量弁
5について図1を用いて説明する。回転計量弁5は、収
容タンク4の底部にその樹脂吸い込み口を接続して、樹
脂材料Pを取り込んで回転停止時は閉め切り弁の機能を
果たして、回転時は弁体内面と回転羽根間で構成する計
量キャビティに順繰りに連続的に吸入口で材料を取り込
んで半回し排出口で取り込んだ材料を連続的に吐き出し
て回転計量出来る。Next, the rotary metering valve 5 which connects the suction port to the lower surface of the above-mentioned storage tank 4 and measures and discharges the resin material P will be described with reference to FIG. The rotary metering valve 5 has its resin suction port connected to the bottom of the storage tank 4 to take in the resin material P and perform the function of a shutoff valve when the rotation is stopped, and is configured between the inner surface of the valve and the rotary vane when rotating. The material can be sequentially taken into the metering cavity through the suction port, half-turned, and the material taken in through the discharge port can be continuously discharged to measure the rotation.
【0030】この吐き出した樹脂材料Pは、図1に示す
様に、成形機50上に設置されるホッパータンク51へ
輸送される。このタンク上に連結されたサイクロン24
Bの胴部に材料輸送管42を連結してこのサイクロン2
4Bの頂部に繋がれた吸気管32Bを通して減圧する事
で回転計量弁5の排出口の近傍に設けた空気導入弁34
から導入される空気で、吐き出した樹脂材料Pは、サイ
クロン24B筒に取り込まれて、その底部の投入弁25
Bを開放してホッパータンク51へ輸送される。The discharged resin material P is transported to a hopper tank 51 installed on the molding machine 50, as shown in FIG. Cyclone 24 connected on this tank
Connect the material transport pipe 42 to the body of B
Air intake valve 34 provided in the vicinity of the outlet of rotary metering valve 5 by reducing the pressure through intake pipe 32B connected to the top of 4B.
The resin material P discharged by the air introduced from the above is taken into the cyclone 24B cylinder, and the injection valve 25 at the bottom thereof is introduced.
B is opened and transported to the hopper tank 51.
【0031】以下に、本発明の樹脂材料の計量供給装置
の動作について、説明する。投入量算出(S10)は、
本材料を入れ替える迄の成形材料の使用量を算出して、
ほぼ使い切ってタンク残量を最小にすることにあり、タ
ンクへの仕込量を成形個数と1個当たり成形重量を掛け
合わせて余裕を加味して求める。The operation of the resin material measuring and feeding device of the present invention will be described below. Input amount calculation (S10)
Calculate the amount of molding material used until this material is replaced,
It is almost used up to minimize the remaining amount of the tank, and the amount charged into the tank is calculated by multiplying the number of moldings and the molding weight per one, and adding a margin.
【0032】材料投入部で計量(S11)は、先に求め
た樹脂材料の仕込量分を計量して、ホッパタンク3上に
備えた材料投入部18を運転して、投入弁25を閉じて
吸引ブロア28を運転しサイクロン24を減圧して、樹
脂材料を吸込管29を介してサイクロン24に取込んで
減圧を解除する。In the material charging section (S11), the amount of the resin material obtained previously is measured, the material charging section 18 provided on the hopper tank 3 is operated, and the charging valve 25 is closed to suck the material. The blower 28 is operated to decompress the cyclone 24, and the resin material is taken into the cyclone 24 via the suction pipe 29 to release the decompression.
【0033】ホッパタンクへ投入貯蔵(S12)は、サ
イクロン24に取込んだ樹脂材料を、投入弁25を開け
て、ホッパタンク3に投入する、これを繰り返して全量
を仕込む。In the hopper tank for charging and storing (S12), the resin material taken into the cyclone 24 is charged into the hopper tank 3 by opening the charging valve 25, and this is repeated to charge the entire amount.
【0034】ホッパタンクで熱風乾燥(S13)は、ホ
ッパタンク3に投入された樹脂材料Pは、熱風吹出し管
21の下面に面した開口から仕込んだ材料中に吹き出し
て、乾燥させる。In the hot air drying (S13) in the hopper tank, the resin material P charged in the hopper tank 3 is blown into the material charged from the opening facing the lower surface of the hot air blowing pipe 21 to be dried.
【0035】成形機用ホッパタンクレベル検出の有/無
?(S14)は、成形機の運転に伴って成形機用ホッパ
タンク51のレベルが上限を割ると設置時間後に、本樹
脂材料計量供給装置へ新たに供給信号を発して、乾燥貯
蔵した樹脂材料の補充する。Whether or not the hopper tank level for the molding machine is detected? In (S14), when the level of the molding machine hopper tank 51 falls below the upper limit as the molding machine operates, a new supply signal is issued to the resin material metering and supplying device after the installation time to replenish the dry and stored resin material. To do.
【0036】計量弁回転(S15)は、上述からの指令
で、予め決められた回転を計量弁に与えて材料排出管4
2に吐き出す、空気輸送(S16)は、吐き出された樹
脂材料を樹脂成形機上に設けられた成型機用ホッパタン
ク51に投入するサイクロン24に減圧吸入されて、輸
送される。The metering valve rotation (S15) is a command from the above, and a predetermined rotation is given to the metering valve to supply the material discharge pipe 4
In the pneumatic transportation (S16) to be discharged to No. 2, the discharged resin material is sucked under reduced pressure into the cyclone 24 that is put into the hopper tank 51 for the molding machine provided on the resin molding machine and transported.
【0037】収容タンクレベルの有/無?(S17)
は、前述の材料計量供給作動が収容タンクレベルが有る
場合は、必要に応じ次ステップに進行できて、逆に収容
タンクレベルが無くなると警報を発し次ステップに進行
できない様に監視している。With / without storage tank level? (S17)
Monitors that the above-mentioned material metering and supplying operation can proceed to the next step as necessary when the storage tank level is present, and conversely, when the storage tank level is exhausted, an alarm is issued and the process cannot proceed to the next step.
【0038】計量タイマが未了/完了?(S18)は、
計量弁が回転して計量タイマが完了すると計量は停止
し、逆に計量時間が未了の際は収容タンクレベルが無く
なり警報を発するまで計量弁は回転し空気輸送する。Measurement timer incomplete / completed? (S18) is
When the metering valve rotates and the metering timer is completed, the metering stops, and conversely, when the metering time is not completed, the metering valve rotates and pneumatically conveys until the storage tank level runs out and an alarm is issued.
【0039】計量弁回転停止(S19)は、以上のよう
に、成形機用ホッパタンク51の乾燥された樹脂材料が
所定レベルまで無くなると、本樹脂材料の計量供給装置
から計量弁回転作動と空気輸送を持って所定のプログラ
ムで自動供給されてこれを繰り返し、材料切換時にはホ
ッパタンク3の残量は最少に成るように使い切る様にし
てある。As described above, the metering valve rotation stop (S19) means that when the resin material dried in the hopper tank 51 for the molding machine is exhausted to a predetermined level, the metering valve rotation operation and pneumatic transportation are performed from the resin material metering and supplying device. It is automatically supplied according to a predetermined program, and this is repeated, and when the material is changed, the hopper tank 3 is used up so that the remaining amount is minimized.
【0040】[0040]
【実施例】次に本発明及び従来技術の方法を用いて、そ
れぞれホッパタンク3内の樹脂材料Pの残量を変化させ
て、このタンクから排出される計量精度を以下比較確認
した。EXAMPLES Next, the residual amount of the resin material P in the hopper tank 3 was changed using the method of the present invention and the method of the prior art, and the weighing accuracy discharged from this tank was compared and confirmed below.
【0041】先ず本発明に基づいて、図1に示す様に、
ホッパタンク3と回転計量弁5との間に本発明の収容タ
ンク(容積が9l)を設けて、機器条件については、ホ
ッパタンク容量:500kg、熱風温度:80〜130
℃、熱風風量:20m3/min、計量設定値:470
0g、計量速度:4000〜5000g/minとし
た。
[実施例1]次に図2に示すタンク内残量に従って変化
させて、その時の回転計量精度を求めた。表1には、そ
れぞれの残量(kg)位置での計量設定値4700gに
対する過不足量をプラスマイナスのグラム値と、同時に
括弧値にはその計量設定値4700gに対する百分率で
計量精度として併記した。First, according to the present invention, as shown in FIG.
The storage tank of the present invention (having a volume of 9 l) is provided between the hopper tank 3 and the rotary metering valve 5, and the equipment conditions are as follows: hopper tank capacity: 500 kg, hot air temperature: 80-130.
° C, hot air volume: 20 m 3 / min, set value for measurement: 470
0 g, metering speed: 4000-5000 g / min. [Example 1] Next, the rotational weighing accuracy at that time was obtained by changing the amount according to the remaining amount in the tank shown in FIG. In Table 1, the excess / deficiency amount with respect to the weighing set value of 4700 g at each remaining amount (kg) position is shown as plus or minus gram value, and at the same time, the parenthesis value is also shown as the weighing accuracy in percentage to the weighing set value of 4700 g.
【0042】この結果に示す様に、タンク内残量が47
kg以下でも狙い値に対してー1.4%でまたタンク内
残量が10kgと最小になってもこれ以内の計量精度が
得られた。As shown in this result, the remaining amount in the tank is 47
Even if it was less than or equal to kg, it was -1.4% of the target value, and even if the remaining amount in the tank was as small as 10 kg, the weighing accuracy within this range was obtained.
【0043】[比較例]図1から、本発明の収容タンク
(容積が9l)を取り除いた図2に示す従来方式にて、
上記と同様にタンク内残量を変化させて、比較測定して
同じく上記計量条件での過不足量(g)と回転計量精度
(%)を求めたものである。[Comparative Example] The conventional method shown in FIG. 2 in which the storage tank of the present invention (having a volume of 9 l) is removed from FIG.
Similarly to the above, the remaining amount in the tank was changed and comparative measurement was performed to similarly determine the excess / deficiency amount (g) and the rotational measurement accuracy (%) under the above measurement conditions.
【0044】この結果においては、タンク内残量が16
0kg以下になると計量精度が2.5%から急速に悪化
して、タンク内残量が10kgと最小に成ると−12.
7%にいたった。In this result, the remaining amount in the tank is 16
When it becomes less than 0 kg, the weighing accuracy rapidly deteriorates from 2.5%, and when the remaining amount in the tank becomes 10 kg, which is the minimum, -12.
It was 7%.
【0045】[0045]
【表1】
表1の結果より、従来方式の比較例ではタンク内残量が
160kg以下になると計量精度が2.5%から急速に
悪化して、タンク内残量が10kgと最小に成ると、−
12.7%のバラツキ状態になるのに対して、収容タン
ク4を用いた本発明の方式ではタンク内残量が47kg
以下でも狙い値に対してー1.4%で更にタンク内残量
が10kgと最小になってもこれ以内の計量精度が得ら
れた。この様に本発明の効果が確認できた。[Table 1] From the results of Table 1, in the comparative example of the conventional method, when the remaining amount in the tank is 160 kg or less, the weighing accuracy rapidly deteriorates from 2.5%, and the remaining amount in the tank reaches the minimum of 10 kg, −
In contrast to the 12.7% variation, in the method of the present invention using the storage tank 4, the remaining amount in the tank is 47 kg.
Even below, the measurement accuracy was within this range even if the remaining amount in the tank was 10 kg, which was -1.4% of the target value. Thus, the effect of the present invention was confirmed.
【0046】尚、本発明の樹脂材料の計量供給方法及び
その計量供給装置では、図1〜図4に示すものに限定さ
れず、例えば次の様な形態をとることが出来る。1)材
料投入部18は、本事例では空気輸送方式を示している
がチューブコンベヤ輸送等の他の方式も用いることが出
来る。The resin material metering and feeding method and the metering and feeding apparatus of the present invention are not limited to those shown in FIGS. 1 to 4, but may be in the following forms, for example. 1) The material feeding section 18 shows an air transportation method in this example, but other methods such as tube conveyor transportation can be used.
【0047】[0047]
【発明の効果】請求項1に記載の樹脂材料の計量供給方
法や請求項2に記載の樹脂材料の計量供給装置では、段
取り替え時の抜き取り時間が最小に出来て、余分な樹脂
材料の乾燥処理も不要になるから、度重なる段取り替え
に対して大幅な切換時間の短縮が得られ、乾燥エネルギ
ーも節減できる。この様な工程は、ホッパタンク底部に
接続された回転計量弁との間に本発明の収容タンクを挿
入する機構を用いることにより計量精度を損なわないか
ら、ホッパータンク内の樹脂材料を最小に成るまで使い
切る事が出来る。According to the resin material measuring and feeding method of the first aspect and the resin material measuring and feeding apparatus of the second aspect, the sampling time at the time of setup change can be minimized, and the excess resin material is dried. Since no treatment is required, the switching time can be greatly shortened for repeated setup changes, and the drying energy can be saved. Since such a process does not impair the measuring accuracy by using the mechanism for inserting the storage tank of the present invention between the rotary measuring valve connected to the bottom of the hopper tank, the resin material in the hopper tank is minimized. Can be used up.
【0048】請求項3に記載の樹脂材料の計量供給装置
では、回転計量弁への樹脂材料の吸込効率が更に向上す
るから計量精度が更に良くなり、樹脂材料の乾燥品質が
最後まで維持できる。In the resin material metering and feeding device according to the third aspect, the efficiency of sucking the resin material into the rotary metering valve is further improved, so that the metering accuracy is further improved and the dry quality of the resin material can be maintained until the end.
【0049】請求項4に記載の樹脂材料の計量供給装置
では、ホッパタンクの下限レベルをより確実に最低量を
捉えることが出来るから、ホッパタンクの残量を最小レ
ベルで管理できるから、抜き取り残量が相応に少なく出
来て段替えの短縮に成る。In the resin material metering and feeding device according to the fourth aspect, since the lower limit level of the hopper tank can be more reliably grasped as the minimum amount, the remaining amount of the hopper tank can be controlled at the minimum level, and therefore the extraction remaining amount is It is possible to reduce the number accordingly and shorten the stage change.
【0050】請求項5に記載の樹脂材料の計量供給装置
では、抜き取り時間が短縮できるから段取り替え時間が
短縮できる。In the resin material measuring and feeding device according to the fifth aspect, the time required for withdrawal can be shortened, and therefore the time required for setup change can be shortened.
【0051】以上の様に、本願の請求項1〜5記載の樹
脂材料の計量供給方法及び樹脂材料の計量供給装置に係
わる発明では、その機能を発揮する事が出来る。As described above, the functions can be exhibited in the inventions relating to the resin material measuring and supplying method and the resin material measuring and supplying device according to claims 1 to 5 of the present application.
【図1】樹脂材料の計量供給装置を示す概念図である。FIG. 1 is a conceptual diagram showing a resin material metering and supplying device.
【図2】ホッパタンク内の高さ方向における貯蔵重量を
示した従来方式の装置の説明図である。FIG. 2 is an explanatory view of a conventional apparatus showing a storage weight in a height direction in a hopper tank.
【図3】ホッパタンク内の樹脂材料の残量が減少して乾
燥用の熱風で上方に巻き上げられる状況を示す図であ
る。FIG. 3 is a diagram showing a situation in which a residual amount of a resin material in a hopper tank is reduced and the resin material is wound up by hot air for drying.
【図4】樹脂材料の計量供給装置の作動内容を示すフロ
ーチャート図である。FIG. 4 is a flowchart showing the operation of the resin material metering and supplying device.
P 樹脂材料 1 樹脂材料の計量供給装置 3 ホッパタンク 4 収容タンク 5 回転計量弁 11 排気壁 13 材料有無検出手段 15 材料抜き取り口 23 熱風吹出口 50 樹脂成形機 51 成形機用ホッパタンク P resin material 1 Resin material metering device 3 hopper tank 4 storage tank 5 rotary metering valve 11 exhaust wall 13 Material presence detection means 15 Material outlet 23 Hot air outlet 50 resin molding machine 51 Hopper tank for molding machine
Claims (5)
料を乾燥保管して小出し計量供給する樹脂材料の計量供
給方法において、材料切り替えまでの所要量を前もって
ホッパータンクに投入し、材料切り換えまで樹脂材料を
追加しないで消費減量させて材料切り換え時のタンク内
の残量を少なくすることを特徴とした樹脂材料の計量供
給方法。1. In a method of metering and feeding resin material in which hot air is blown into a hopper tank to dry-store the resin material and to dispense and meter the resin material, a required amount until the material is switched is put into the hopper tank in advance, and the resin material is switched until the material is switched. A method of metering and feeding a resin material, characterized in that the amount of consumption is reduced without adding the element and the remaining amount in the tank is reduced when the material is changed.
するホッパータンクと、前記ホッパータンク排出口に連
結されそのタンク内の残留樹脂を収容させる収容タンク
と、前記収容タンクの底部にその樹脂吸い込み口を接続
しその吐き出し口を樹脂輸送管へ連結した回転計量弁
と、を少なくとも備えて成ることを特徴とする樹脂材料
の計量供給装置。2. A hopper tank for drying and storing the resin to be supplied to the molding machine, a storage tank connected to the hopper tank discharge port for storing the residual resin in the tank, and the resin at the bottom of the storage tank. A resin material metering / supplying device comprising at least a rotary metering valve having a suction port connected thereto and the discharge port connected to a resin transport pipe.
空気排気壁を有している請求項2に記載の樹脂材料の計
量供給装置。3. The resin material metering / supplying device according to claim 2, wherein the storage tank has an air exhaust wall after drying on a wall surface thereof.
の有無を検出する検出手段を備えている請求項2又は3
に記載の樹脂材料の計量供給装置。4. The storage tank is provided with a detection means for detecting the presence / absence of a resin material inside the storage tank.
The metering and feeding device for the resin material according to.
を外部に排出する抜き口を備えている請求項2〜4の何
れかに記載の樹脂材料の計量供給装置。5. The resin material metering / supplying device according to claim 2, wherein the storage tank is provided with an outlet for discharging the resin material inside thereof to the outside.
Priority Applications (1)
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JP2002093390A JP2003285330A (en) | 2002-03-29 | 2002-03-29 | Metering and supplying method for resin material and metering and supplying apparatus therefor |
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Application Number | Priority Date | Filing Date | Title |
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JP2002093390A JP2003285330A (en) | 2002-03-29 | 2002-03-29 | Metering and supplying method for resin material and metering and supplying apparatus therefor |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1630507A1 (en) * | 2004-08-23 | 2006-03-01 | Star Seiki Co., Ltd. | Apparatus and method for drying resin pellets |
WO2011007713A1 (en) * | 2009-07-14 | 2011-01-20 | 株式会社松井製作所 | Material blending/supply device and material blending/supply method |
CN102574307A (en) * | 2009-10-07 | 2012-07-11 | 金泉坤 | Rotor-type raw material supplier |
-
2002
- 2002-03-29 JP JP2002093390A patent/JP2003285330A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1630507A1 (en) * | 2004-08-23 | 2006-03-01 | Star Seiki Co., Ltd. | Apparatus and method for drying resin pellets |
US7316079B2 (en) * | 2004-08-23 | 2008-01-08 | Star Seiki Co., Ltd. | Method for drying resin pellets |
CN1739933B (en) * | 2004-08-23 | 2010-06-09 | 星精密机械有限公司 | Apparatus for drying resin pellets and method for drying resin pellets |
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