JPH0530828Y2 - - Google Patents
Info
- Publication number
- JPH0530828Y2 JPH0530828Y2 JP1990019025U JP1902590U JPH0530828Y2 JP H0530828 Y2 JPH0530828 Y2 JP H0530828Y2 JP 1990019025 U JP1990019025 U JP 1990019025U JP 1902590 U JP1902590 U JP 1902590U JP H0530828 Y2 JPH0530828 Y2 JP H0530828Y2
- Authority
- JP
- Japan
- Prior art keywords
- curing
- slow
- curing agent
- agent
- fast
- 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 - Lifetime
Links
- 239000003795 chemical substances by application Substances 0.000 claims description 95
- 239000011230 binding agent Substances 0.000 claims description 33
- 239000004576 sand Substances 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 12
- 239000003110 molding sand Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007849 furan resin Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Accessories For Mixers (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、鋳物砂に混入される粘結剤に対
し、遅硬性硬化剤と速硬性硬化剤をそれぞれ適量
供給するようにした鋳型材料の調整装置に関す
る。[Detailed description of the invention] (Field of industrial application) This invention is a mold material that supplies appropriate amounts of a slow hardening agent and a quick hardening agent to the binder mixed in foundry sand. Relating to an adjustment device.
（従来の技術）
鋳型材料としては、通常、鋳物砂と、粘結剤
と、この粘結剤の硬化速度を調整する遅硬性硬化
剤と速硬性硬化剤との混合物が用いられている。(Prior Art) As a mold material, a mixture of foundry sand, a binder, and a slow hardening agent and a fast hardening agent that adjust the hardening speed of the binder is usually used.
ところで、鋳造における鋳物砂は、通常、繰り
返し使用されるものであるため、鋳型成形時に
は、高温の鋳物砂を、一旦、水冷や空冷により冷
却して温度調整することが行われる。しかし、こ
の鋳物砂の温度調整は容易ではないことから、鋳
型材料を調整しようとする際の鋳物砂の温度が一
定しないのが実情である。 By the way, since molding sand in casting is usually used repeatedly, during mold forming, the high temperature molding sand is once cooled by water cooling or air cooling to adjust the temperature. However, since it is not easy to adjust the temperature of this foundry sand, the actual situation is that the temperature of the foundry sand is not constant when trying to adjust the mold material.
従つて、鋳型材料を調整しようとする際に、例
えば、粘結剤に対し、ある一種類の硬化剤を一定
の比率で供給した場合には、このときの鋳物砂の
温度が高いと、硬化剤の一般的特性としてその硬
化速度が速くなり、つまり、鋳型の硬化が速くな
り過ぎることがある。そして、この場合には、鋳
型の表面が粗面になり易く、この結果、鋳造欠陥
が生じ易くなるという不都合がある。 Therefore, when trying to adjust the mold material, for example, if one type of curing agent is supplied at a fixed ratio to the binder, if the temperature of the molding sand is high at this time, hardening will occur. A general property of the agent is that it cures rapidly, which may cause the mold to cure too quickly. In this case, there is a disadvantage that the surface of the mold tends to be rough, and as a result, casting defects are likely to occur.
一方、鋳物砂の温度が低いと、同上硬化剤の一
般的特性としてその硬化速度が所望速度よりも遅
くなり、このため、鋳型成形の能率向上が阻害さ
れるという問題がある。 On the other hand, if the temperature of the molding sand is low, the curing rate is slower than the desired speed as a general characteristic of the curing agent mentioned above, and therefore there is a problem in that the efficiency of mold forming is inhibited.
そこで、従来では、例えば、作業者がその経験
により、鋳物砂の温度に見合う遅硬性硬化剤と速
硬性硬化剤の供給量の混合比を定めて、これを手
作業にて粘結剤に供給することが行われている。 Therefore, in the past, for example, based on their experience, workers determined the mixing ratio of the supply amount of slow hardening agent and quick hardening agent that corresponded to the temperature of the foundry sand, and then manually supplied this to the binder. things are being done.
（考案が解決しようとする問題点）
しかし、上記のように作業者が経験的に遅硬性
硬化剤と速硬性硬化剤を供給すると、その混合比
や供給量の精度にばらつきが生じ、このため、鋳
型に適正な硬化速度が得られないおそれがある。(Problem that the invention aims to solve) However, as mentioned above, when an operator supplies a slow-curing curing agent and a fast-curing curing agent based on their experience, there will be variations in the mixing ratio and accuracy of the supply amount. , there is a risk that an appropriate curing rate may not be obtained for the mold.
（考案の目的）
この考案は、上記のような事情に注目してなさ
れたもので、鋳型材料を調整しようとする際の鋳
物砂の温度が一定しなくても、鋳型に適正な硬化
速度が得られるようにし、かつ、遅硬性硬化剤や
速硬性硬化剤の量的な管理が容易にできるように
することを目的とする。(Purpose of the invention) This invention was made with attention to the above-mentioned circumstances, and it allows the mold to have an appropriate hardening speed even if the temperature of the molding sand is not constant when adjusting the mold material. It is an object of the present invention to make it possible to obtain a curing agent and to easily control the quantity of a slow-curing curing agent and a fast-curing curing agent.
（考案の構成）
上記目的を達成するためのこの考案の特徴とす
るところは、鋳物砂に混入される粘結剤に対し、
遅硬性硬化剤と速硬性硬化剤とを供給する供給手
段と、同上鋳物砂の温度を検出する検出センサー
と、この検出センサーの検出信号を入力して上記
供給手段による遅硬性硬化剤と速硬性硬化剤の供
給量の混合比を変化させるよう信号を出力する制
御手段とを備え、かつ、この制御手段により、単
位時間における上記遅硬性硬化剤と速硬性硬化剤
の合計供給量がほぼ一定となるよう同上供給手段
を制御した点にある。(Structure of the device) The feature of this device to achieve the above object is that the binder mixed in the foundry sand is
A supply means for supplying a slow hardening agent and a fast hardening agent, a detection sensor for detecting the temperature of the same foundry sand, and a detection signal of the detection sensor is inputted to supply the slow hardening agent and fast hardening agent by the supply means. and a control means for outputting a signal to change the mixing ratio of the supply amount of the curing agent, and the control means allows the total supply amount of the slow-curing curing agent and the fast-curing curing agent to be substantially constant per unit time. The point is that the supply means is controlled so that the same as above is achieved.
（作用） 上記構成による作用は次の如くである。(effect) The effects of the above configuration are as follows.
鋳型材料１は鋳物砂２、粘結剤３、および、こ
の粘結剤３の硬化速度を調整するための硬化剤で
構成され、この硬化剤は遅硬性硬化剤４と速硬性
硬化剤５とによつて構成される。 The mold material 1 is composed of foundry sand 2, a binder 3, and a hardening agent for adjusting the hardening speed of the binder 3. Composed by.
そして、上記鋳型材料１を調整しようとする場
合には、まず、鋳物砂２の温度が検出センサー３
０によつて検出され、その検出信号が制御手段３
１に入力される。すると、上記検出信号に基づく
この制御手段３１の出力信号が、供給手段２４〜
２７に入力され、この遅硬性硬化剤ポンプ２４が
遅硬性硬化剤４と速硬性硬化剤５の供給量の混合
比Ｒを変化させる。 When trying to adjust the mold material 1, first, the temperature of the molding sand 2 is detected by the detection sensor 3.
0, and the detection signal is detected by the control means 3.
1 is input. Then, the output signal of the control means 31 based on the detection signal is transmitted to the supply means 24 to
27, and this slow hardening agent pump 24 changes the mixing ratio R of the supply amounts of the slow hardening agent 4 and the fast hardening agent 5.
このため、例えば、鋳物砂２の温度が高いとき
には、遅硬性硬化剤４の供給量が多くなるよう上
記混合比Ｒを変化させて、粘結剤３の硬化速度が
速くなり過ぎることを抑制する。一方、鋳物砂２
の温度が低いときには、速硬性硬化剤５の供給量
が多くなるよう上記混合比Ｒを変化させて、粘結
剤３の硬化速度が遅くなり過ぎることを防止す
る。よつて、鋳物砂２の温度が一定しなくても、
粘結剤３に対する遅硬性硬化剤４や速硬性硬化剤
５の供給量が適正に調整されて、鋳物成形を所望
速度ですることができる。 For this reason, for example, when the temperature of the foundry sand 2 is high, the mixing ratio R is changed so that the supply amount of the slow hardening agent 4 is increased, thereby suppressing the hardening speed of the binder 3 from becoming too fast. . On the other hand, foundry sand 2
When the temperature is low, the mixing ratio R is changed so that the supply amount of the fast-curing curing agent 5 increases, thereby preventing the curing speed of the binder 3 from becoming too slow. Therefore, even if the temperature of the molding sand 2 is not constant,
By appropriately adjusting the supply amount of the slow hardening agent 4 and the fast hardening agent 5 to the binder 3, the casting can be formed at a desired speed.
（実施例）
以下、この考案の実施例を図面により説明す
る。(Example) Hereinafter, an example of this invention will be described with reference to the drawings.
（第１実施例） 第１図と第２図は第１実施例を示している。(First example) 1 and 2 show a first embodiment.
第１図において、鋳型材料１の最終製品は、鋳
物砂２、粘結剤３、および、この粘結剤３の硬化
速度を調整するための遅硬性硬化剤４や速硬性硬
化剤５によつて構成される。 In FIG. 1, the final product of the mold material 1 is made of foundry sand 2, a binder 3, and a slow-hardening agent 4 and a fast-hardening agent 5 for adjusting the hardening speed of the binder 3. It is composed of
上記鋳物砂２は繰り返し使用されるものであつ
て、鋳型材料１を調整する場合には、この繰り返
し使用の過程において、高温となつている鋳物砂
２は、水冷却式や空気冷却式の温度調整装置７に
よつて、約20℃程度にまで冷却される。上記温度
調整装置７の下部にはダンパー８が取り付けられ
ており、このダンパー８を開ければ、温度調整装
置７で冷却された鋳物砂２が下方に向つて排出さ
れるようになつている。 The foundry sand 2 is used repeatedly, and when adjusting the mold material 1, the foundry sand 2, which has become high in the process of repeated use, is heated to a temperature of a water-cooled or air-cooled type. It is cooled down to about 20° C. by the adjusting device 7. A damper 8 is attached to the lower part of the temperature adjustment device 7, and when the damper 8 is opened, the molding sand 2 cooled by the temperature adjustment device 7 is discharged downward.
９はスクリユーコンベア式のラインミキサー
で、このラインミキサー９は軸心ほぼ水平の円筒
状ケーシング１０を有し、このケーシング１０の
一端には受入ホツパ１１が取り付けられ、他端に
は排出シユート１２が取り付けられている。ま
た、上記ケーシング１０内にはスクリユー１３が
回転自在に収納され、このスクリユー１３を駆動
させる電動機１４が設けられている。 9 is a screw conveyor type line mixer, and this line mixer 9 has a cylindrical casing 10 whose axis is approximately horizontal.A receiving hopper 11 is attached to one end of the casing 10, and a discharge chute 12 is attached to the other end. is installed. Further, a screw 13 is rotatably housed in the casing 10, and an electric motor 14 for driving the screw 13 is provided.
そして、前記温度調整装置７から排出されてき
た鋳物砂２は、上記受入ホツパ１１を通してライ
ンミキサーに投入される。また、上記電動機１４
によるスクリユー１３の駆動で、受入ホツパ１１
に投入された鋳物砂２は、ケーシング１０内にお
いてそれ自体混合されながら、排出シユート１２
側に送られて、ここから排出される。 Then, the molding sand 2 discharged from the temperature adjusting device 7 is fed into the line mixer through the receiving hopper 11. Further, the electric motor 14
The receiving hopper 11 is driven by the screw 13.
The foundry sand 2 introduced into the casing 10 is mixed within the casing 10 while being discharged through the discharge chute 12.
It is sent to the side and discharged from here.
前記粘結剤３は液状のフラン樹脂であつて、こ
の粘結剤３を溜める粘結剤タンク１６が設けられ
ている。また、この粘結剤タンク１６内の粘結剤
３を上記ラインミキサー９に送り込む粘結剤ポン
プ１７が設けられ、この粘結剤ポンプ１７は電動
機１８によつて駆動される。上記粘結剤ポンプ１
７の吐出口は、送液パイプ１９によつてラインミ
キサー９に連結され、粘結剤３はラインミキサー
９内の鋳物砂２に混入可能とされている。 The binder 3 is a liquid furan resin, and a binder tank 16 for storing the binder 3 is provided. Further, a binder pump 17 is provided for feeding the binder 3 in the binder tank 16 to the line mixer 9, and this binder pump 17 is driven by an electric motor 18. The above binder pump 1
The discharge port 7 is connected to the line mixer 9 by a liquid feed pipe 19, and the binder 3 can be mixed into the foundry sand 2 in the line mixer 9.
前記遅硬性硬化剤４や速硬性硬化剤５は液状の
スルホン酸などの酸や、アルカリ性のものであつ
て、これらを溜める遅硬性硬化剤タンク２１と速
硬性硬化剤タンク２２とが設けられている。ま
た、上記各タンク２１，２２内の硬化剤４，５を
それぞれ前記ラインミキサー９に送り込む供給手
段たる遅硬性硬化剤ポンプ２４と速硬性硬化剤ポ
ンプ２５、および、これらを変速可能に駆動させ
る電動機２６，２７が設けられる。 The slow-curing curing agent 4 and the fast-curing curing agent 5 are liquid acids such as sulfonic acid or alkaline substances, and a slow-curing curing agent tank 21 and a fast-curing curing agent tank 22 are provided to store them. There is. Further, a slow curing curing agent pump 24 and a fast curing curing agent pump 25, which serve as supply means for feeding the curing agents 4 and 5 in the tanks 21 and 22 into the line mixer 9, respectively, and an electric motor that drives these in a variable speed manner. 26 and 27 are provided.
上記両ポンプ２４，２５の各吐出口は送液パイ
プ２８により互いに合流させられており、その合
流後、ミキサー２９に連結されている。このミキ
サー２９はケーシングと、このケーシング内で上
記遅硬性硬化剤４と速硬性硬化剤５とを互いに十
分に混合させる攪拌羽根とを備えている。 The respective discharge ports of both the pumps 24 and 25 are made to merge with each other by a liquid sending pipe 28, and after the merge, they are connected to a mixer 29. The mixer 29 includes a casing and stirring blades for sufficiently mixing the slow curing agent 4 and the fast curing agent 5 with each other within the casing.
また、このミキサー２９の排出口は前記ライン
ミキサー９に連結され、このラインミキサー９内
に、十分混合された上記各硬化剤４，５が供給さ
れる。そして、上記ラインミキサー９内に鋳物砂
２、粘結剤３、および各硬化剤４，５が供給され
ると、これらはこのラインミキサー９内で互いに
十分に混合されることとなる。 Further, the outlet of this mixer 29 is connected to the line mixer 9, into which the curing agents 4 and 5 that have been sufficiently mixed are supplied. When the foundry sand 2, the binder 3, and the hardening agents 4 and 5 are supplied into the line mixer 9, they are sufficiently mixed with each other within the line mixer 9.
前記温度調整装置７の底部における鋳物砂２の
温度を検出する検出センサー３０が設けられる。
また、この検出センサー３０の検出信号を入力し
て、上記電動機２６，２７に信号を出力する電子
的な制御手段３１が設けられている。そして、こ
の制御手段３１は、上記各電動機２６，２７への
信号の出力によつて、各ポンプ２４，２５の作動
速度を変化させ、つまり、これにより遅硬性硬化
剤４と速硬性硬化剤５の供給量をそれぞれ変化さ
せる。 A detection sensor 30 is provided to detect the temperature of the foundry sand 2 at the bottom of the temperature adjustment device 7.
Further, an electronic control means 31 is provided which inputs the detection signal of this detection sensor 30 and outputs a signal to the electric motors 26 and 27. The control means 31 changes the operating speed of each of the pumps 24 and 25 by outputting a signal to each of the electric motors 26 and 27, thereby causing the slow curing agent 4 and the fast curing agent 5 to The supply amount of each is changed.
第２図において、前記遅硬性硬化剤４と速硬性
硬化剤５の供給量の混合比がＲとされ、つまり、
（遅硬性硬化剤４の供給量）／（速硬性硬化剤５
の供給量）＝混合比Ｒとされている。 In FIG. 2, the mixing ratio of the supply amounts of the slow-curing curing agent 4 and the fast-curing curing agent 5 is R, that is,
(supply amount of slow curing agent 4)/(fast curing agent 5
supply amount)=mixing ratio R.
ところで、鋳型材料１を調整しようとする際、
鋳物砂２の温度が高いときには、この温度によ
り、粘結剤３の硬化が速められて好ましくない。
そこで、検出センサー３０により検出される鋳物
砂２の温度が高いときには、遅硬性硬化剤４の供
給量を多くする一方、速硬性硬化剤５の供給量を
少なくし、つまり、図中実線で示すように混合比
Ｒを段階的に増加させるよう制御手段３１が構成
されている。このため、鋳型成形時の粘結剤３の
硬化速度が速くなり過ぎることが抑制され、適正
な速度で鋳型成形がなされることとなる。 By the way, when trying to adjust the mold material 1,
When the temperature of the foundry sand 2 is high, this temperature accelerates the hardening of the binder 3, which is undesirable.
Therefore, when the temperature of the foundry sand 2 detected by the detection sensor 30 is high, the amount of slow-hardening curing agent 4 is increased, while the amount of fast-hardening hardening agent 5 is decreased, as indicated by the solid line in the figure. The control means 31 is configured to increase the mixture ratio R step by step. Therefore, the curing speed of the binder 3 during mold molding is prevented from becoming too fast, and mold molding can be performed at an appropriate speed.
一方、鋳物砂２の温度が低いときには、遅硬性
硬化剤４の供給量を少なくする一方、速硬性硬化
剤５の供給量を多くし、つまり、混合比Ｒが段階
的に減少させられるよう同上制御手段３１が構成
されている。このため、鋳型成形時の粘結剤３の
硬化速度が遅くなり過ぎることが防止される。 On the other hand, when the temperature of the foundry sand 2 is low, the amount of slow hardening hardening agent 4 is decreased while the amount of fast hardening hardening agent 5 is increased, that is, the mixing ratio R is reduced in stages. A control means 31 is configured. Therefore, the curing speed of the binder 3 during mold molding is prevented from becoming too slow.
上記の場合、各ポンプ２４，２５によりライン
ミキサー９に供給される遅硬性硬化剤４と速硬性
硬化剤５は、単位時間におけるこれらの合計量が
ほぼ一定となるよう各電動機２６，２７が制御手
段３１によつて制御されている。即ち、このよう
に制御することによつて、各硬化剤４，５の残量
等の量の管理をし易くしてあり、また、これらの
合計量が過大、もしくは過少になることを防止し
ている。 In the above case, the slow curing curing agent 4 and the fast curing curing agent 5 supplied to the line mixer 9 by the pumps 24 and 25 are controlled by the electric motors 26 and 27 so that the total amount thereof per unit time is approximately constant. It is controlled by means 31. That is, by controlling in this way, it is possible to easily manage the remaining amounts of each of the curing agents 4 and 5, and also prevent the total amount of these from becoming too large or too small. ing.
また、鋳物砂２の温度変化に対する混合比Ｒの
変化は、第２図中仮想線で示すように連続的であ
つてもよい。また、粘結剤３はフラン樹脂以外
に、フエノール樹脂や、その他の有機合成樹脂で
あつてもよい。更に、硬化剤４，５は三種以上の
硬化剤を供給するようにしてもよい。また、検出
センサー３０は受入ホツパ１１内の鋳物砂２の温
度を検出するように設けてもよい。 Further, the change in the mixing ratio R with respect to the temperature change of the foundry sand 2 may be continuous as shown by the imaginary line in FIG. Further, the binder 3 may be a phenol resin or other organic synthetic resin in addition to the furan resin. Furthermore, three or more types of curing agents 4 and 5 may be supplied. Further, the detection sensor 30 may be provided to detect the temperature of the molding sand 2 in the receiving hopper 11.
（第２実施例） 第３図と第４図とは第２実施例を示している。(Second example) 3 and 4 show a second embodiment.
これによれば、遅硬性硬化剤ポンプ２４と速硬
性硬化剤ポンプ２５の吐出側である送液パイプ２
８の中途部から遅硬性硬化剤４と速硬性硬化剤５
に向う戻りパイプ３３，３４が設けられ、これら
戻りパイプ３３，３４の中途部には絞り弁３５，
３６が介設されている。 According to this, the liquid sending pipe 2 which is the discharge side of the slow curing curing agent pump 24 and the fast curing curing agent pump 25
From the middle part of 8, slow curing curing agent 4 and fast curing curing agent 5
Return pipes 33 and 34 are provided, and a throttle valve 35,
36 are interposed.
また、上記送液パイプ２８には遅硬性硬化剤ポ
ンプ２４と速硬性硬化剤ポンプ２５に対応して、
それぞれ電動式もしくはソレノイド式の供給装置
たる自動開閉弁３７，３８が介設されている。 In addition, the liquid sending pipe 28 is provided with a slow curing curing agent pump 24 and a fast curing curing agent pump 25.
Automatic opening/closing valves 37 and 38, each of which is an electric or solenoid type supply device, are interposed.
そして、検出センサー３０の検出信号に基づ
き、制御手段３１が上記各自動開閉弁３７，３８
に信号を出力し、これにより、これらの開度をそ
れぞれに調整し、つまり、これにより遅硬性硬化
剤４と速硬性硬化剤５の供給量をそれぞれ変化さ
せる。なお、この場合、遅硬性硬化剤ポンプ２４
と速硬性硬化剤ポンプ２５から吐出された遅硬性
硬化剤４や速硬性硬化剤５の一部は戻りパイプ３
３，３４を通つて遅硬性硬化剤タンク２１や速硬
性硬化剤タンク２２に戻され、これにより、遅硬
性硬化剤ポンプ２４や速硬性硬化剤ポンプ２５の
各吐出側がそれぞれほぼ一定圧に保たれるように
なつている。 Then, based on the detection signal from the detection sensor 30, the control means 31 controls the automatic opening/closing valves 37, 38.
A signal is output to , thereby adjusting these opening degrees respectively, that is, thereby changing the supply amounts of the slow-curing curing agent 4 and the fast-curing curing agent 5, respectively. In this case, the slow curing agent pump 24
A portion of the slow hardening agent 4 and quick hardening agent 5 discharged from the fast hardening agent pump 25 is returned to the return pipe 3.
3 and 34, and is returned to the slow-curing curing agent tank 21 and the fast-curing curing agent tank 22, so that the respective discharge sides of the slow-curing curing agent pump 24 and the fast-curing curing agent pump 25 are maintained at approximately constant pressures. It's starting to become easier.
第４図中実線で示すように、上記遅硬性硬化剤
４と速硬性硬化剤５の混合比Ｒは、第１実施例と
同じく温度が高くなるに従つて大きくなるように
制御手段３１や自動開閉弁３７，３８により制御
されている。 As shown by the solid line in FIG. 4, the mixing ratio R of the slow-curing curing agent 4 and the fast-curing curing agent 5 is controlled by the control means 31 or automatically so that it increases as the temperature increases, as in the first embodiment. It is controlled by on-off valves 37 and 38.
第３図において、上記制御手段３１にはバイア
ス演算器３９が接続されている。そして、このバ
イアス演算器３９を操作すれば、第４図中実線で
示した混合比Ｒが上下に３段階並行移動できるよ
うになつており、つまり、諸条件に合致した混合
比Ｒが選択できるようになつている。 In FIG. 3, a bias calculator 39 is connected to the control means 31. By operating this bias calculator 39, the mixture ratio R shown by the solid line in FIG. It's becoming like that.
例えば、本装置の稼働時期が夏であるか冬であ
るかなど雰囲気温度や湿度、また、作業条件など
の諸条件に合致するような混合比Ｒが、上記バイ
アス演算器３９により容易に得られるようになつ
ている。 For example, the bias calculator 39 can easily obtain a mixture ratio R that matches various conditions such as ambient temperature and humidity, work conditions, etc., such as whether the device is operated in summer or winter. It's becoming like that.
他の構成や作用は前記第１実施例と同様であ
る。 Other structures and functions are the same as those of the first embodiment.
（考案の効果）
この考案によれば、鋳物砂に混入される粘結剤
に対し、遅硬性硬化剤と速硬性硬化剤とを供給す
る供給手段と、同上鋳物砂の温度を検出する検出
センサーと、この検出センサーの検出信号を入力
して上記供給手段による遅硬性硬化剤と速硬性硬
化剤の供給量の混合比を変化させるよう信号を出
力する制御手段とを備えたため、例えば、鋳物砂
の温度が高いときには、遅硬性硬化剤と速硬性硬
化剤の供給量の混合比を変化させて、粘結剤の硬
化速度が速くなり過ぎることを抑制でき、一方、
鋳物砂の温度が低いときにも、同上混合比を変化
させて、粘結剤の硬化速度が遅くなり過ぎること
を防止できる。つまり、鋳物砂の温度が一定しな
くても、粘結剤に対する遅硬性硬化剤や速硬性硬
化剤の供給量が適正に調整されて、所望の速度で
鋳型成形ができることとなる。(Effect of the invention) According to this invention, there is provided a supply means for supplying a slow curing agent and a fast curing agent to the binder mixed in the foundry sand, and a detection sensor for detecting the temperature of the foundry sand. and a control means for inputting the detection signal of the detection sensor and outputting a signal to change the mixing ratio of the supply amount of the slow hardening agent and the fast hardening agent by the supplying means. When the temperature is high, it is possible to prevent the curing speed of the binder from becoming too fast by changing the mixing ratio of the supply amount of the slow-curing curing agent and the fast-curing curing agent.
Even when the temperature of the foundry sand is low, it is possible to prevent the hardening speed of the binder from becoming too slow by changing the above mixing ratio. In other words, even if the temperature of the molding sand is not constant, the amount of slow hardening agent or fast hardening agent supplied to the binder can be adjusted appropriately, and mold molding can be performed at a desired speed.
しかも、上記制御手段により、単位時間におけ
る上記遅硬性硬化剤と速硬性硬化剤の合計供給量
がほぼ一定となるよう同上供給手段を制御したた
め、各硬化剤の合計量が過大、もしくは過少にな
ることが防止されてこの硬化剤量の残量等の管理
が容易になるという利点もある。 Furthermore, since the control means controls the supply means so that the total supply amount of the slow-curing curing agent and the fast-curing curing agent per unit time is approximately constant, the total amount of each curing agent becomes too large or too small. There is also the advantage that this is prevented and the remaining amount of the curing agent, etc. can be easily managed.
第１図と第２図はこの考案の第１実施例を示
し、第１図は全体概略線図、第２図は制御を示す
グラフ図である。第３図と第４図はこの考案の第
２実施例を示し、第３図は第１図の一部に相当す
る図、第４図は第２図に相当する図である。
１……鋳型材料、２……鋳物砂、３……粘結
剤、４……遅硬性硬化剤、５……速硬性硬化剤、
９……ラインミキサー、２４……遅硬性硬化剤ポ
ンプ（供給手段）、２５……速硬性硬化剤ポンプ
（供給手段）、２６……電動機（供給手段）、２７
……電動機（供給手段）、３０……検出センサー、
３１……制御手段、３７……自動開閉弁（供給装
置）、３８……自動開閉弁（供給装置）、Ｒ……混
合比。
1 and 2 show a first embodiment of this invention, with FIG. 1 being an overall schematic diagram and FIG. 2 being a graph diagram showing control. 3 and 4 show a second embodiment of this invention, with FIG. 3 corresponding to a part of FIG. 1, and FIG. 4 corresponding to FIG. 2. 1... Mold material, 2... Foundry sand, 3... Binder, 4... Slow hardening agent, 5... Rapid hardening agent,
9... Line mixer, 24... Slow curing curing agent pump (supply means), 25... Rapid curing curing agent pump (supplying means), 26... Electric motor (supplying means), 27
...Electric motor (supply means), 30...Detection sensor,
31...Control means, 37...Automatic on-off valve (supply device), 38...Automatic on-off valve (supply device), R...Mixing ratio.
Claims (1)
剤と速硬性硬化剤とを供給する供給手段と、同上
鋳物砂の温度を検出する検出センサーと、この検
出センサーの検出信号を入力して上記供給手段に
よる遅硬性硬化剤と速硬性硬化剤の供給量の混合
比を変化させるよう信号を出力する制御手段とを
備え、かつ、この制御手段により、単位時間にお
ける上記遅硬性硬化剤と速硬性硬化剤の合計供給
量がほぼ一定となるよう同上供給手段を制御した
鋳型材料の調整装置。 A supply means for supplying a slow hardening agent and a quick hardening agent to the binder mixed in the foundry sand, a detection sensor for detecting the temperature of the foundry sand, and a detection signal from this detection sensor is inputted. control means for outputting a signal to change the mixing ratio of the supply amount of the slow-curing curing agent and the fast-curing curing agent by the supplying means; A mold material adjusting device in which the above supply means is controlled so that the total supply amount of the fast-curing curing agent is almost constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990019025U JPH0530828Y2 (en) | 1990-02-26 | 1990-02-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990019025U JPH0530828Y2 (en) | 1990-02-26 | 1990-02-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03111440U JPH03111440U (en) | 1991-11-14 |
| JPH0530828Y2 true JPH0530828Y2 (en) | 1993-08-06 |
Family
ID=31522161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990019025U Expired - Lifetime JPH0530828Y2 (en) | 1990-02-26 | 1990-02-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530828Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5324364A (en) * | 1976-08-20 | 1978-03-07 | Teijin Ltd | Process for manufacture of extruded polyester foam product |
| EP0316166A2 (en) * | 1987-11-12 | 1989-05-17 | Herbert William Reynolds | Apparatus for and a method of producing moulding sand for moulds |
-
1990
- 1990-02-26 JP JP1990019025U patent/JPH0530828Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5324364A (en) * | 1976-08-20 | 1978-03-07 | Teijin Ltd | Process for manufacture of extruded polyester foam product |
| EP0316166A2 (en) * | 1987-11-12 | 1989-05-17 | Herbert William Reynolds | Apparatus for and a method of producing moulding sand for moulds |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03111440U (en) | 1991-11-14 |
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