JP5397779B2 - Receptor forming device and frame-molding device - Google Patents
Receptor forming device and frame-molding device Download PDFInfo
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Description
本発明は、抜枠鋳型造型装置に用いられ、鋳型を造型する際に受口を形成する受口形成装置及びこれを用いた抜枠鋳型造型装置に関する。 The present invention relates to a receiving port forming device that is used in a blank frame mold making device and forms a receiving port when molding a mold, and a blank frame mold making device using the same.
従来、抜枠鋳型造型装置として、例えば特許文献１に記載されたような装置が知られている。このような抜枠鋳型造型装置は、上下鋳型を鋳枠内で造型した後に、上下鋳型を型合わせして抜枠を行う。また、抜枠鋳型造型装置には、上下鋳型を造型する際に、上鋳型に受口及び湯口を形成することが行われる。この受口及び湯口に、砂粒が混入すると、溶湯に巻き込まれて砂かみ不良が発生して問題となるおそれがあった。 Conventionally, for example, an apparatus as described in Patent Document 1 is known as a punching mold making apparatus. In such a punching mold making apparatus, the upper and lower molds are molded in a casting frame, and then the upper and lower molds are matched to perform punching. Further, in the punching mold making apparatus, when the upper and lower molds are formed, a receiving port and a gate are formed in the upper mold. If sand particles are mixed into the receiving port and the gate, there is a possibility that it will be caught in the molten metal and a sand bite defect will occur, resulting in a problem.
本発明の目的は、受口及び湯口への砂粒の混入を防止しつつ、造型時に受口を形成する受口形成装置及び抜枠鋳型造型装置を提供することにある。 It is an object of the present invention to provide a receiving port forming apparatus and a blank frame mold making device that form a receiving port during molding while preventing sand particles from being mixed into the receiving port and the gate.
本発明に係る受口形成装置は、マッチプレートを挟持する上下鋳枠と、該上下鋳枠の開口部に挿入され造型空間を形成する上下スクイズプレートとにより形成された造型空間に充填された鋳型砂を圧縮して上下鋳型を造型する抜枠鋳型造型装置に用いられるとともに、上スクイズプレートに取り付けられて上鋳型に受口を形成する受口形成装置において、前記上スクイズプレートと一体化するための取付部と、前記取付部から下方側に向けて前記取付部と一体に設けられ、前記受口の斜面を形成する先端先細り状の斜面形成部と、前記斜面形成部の先端から前記取付部の端面まで貫通するように形成され、湯口を形成する湯口棒を挿通可能とする挿通部と、前記斜面形成部の基端側で、且つこの基端の外側に位置して立ち上がり形成されるとともに、壁面が外側に向くようにされた周壁部とを備え、前記斜面形成部と、前記周壁部との間には、周方向に形成された溝部が形成されている。 The receiving port forming apparatus according to the present invention includes a mold filled in a molding space formed by an upper and lower casting frame that sandwiches a match plate and an upper and lower squeeze plate that is inserted into an opening of the upper and lower casting frame to form a molding space. To be integrated with the upper squeeze plate in a mouth forming apparatus that is attached to the upper squeeze plate and forms an opening in the upper mold while being used in a punched frame mold making device that forms sand by compressing sand An attachment portion, a tip-side tapered slope forming portion which is provided integrally with the attachment portion toward the lower side from the attachment portion and forms the slope of the receiving port, and the attachment portion from the tip of the slope formation portion An insertion portion that is formed so as to penetrate to the end surface of the first portion, and allows insertion of a gate rod that forms a gate, and is formed on the base end side of the slope forming portion and outside the base end so as to rise. Moni, walls and a peripheral wall portion which is to face outwardly, and the inclined surface forming portion, between the peripheral wall portion, the groove formed in the circumferential direction are formed.
また、本発明に係る抜枠鋳型造型装置は、上述の受口形成装置を備えるとともに、さらに、マッチプレートを挟持する上下鋳枠と、該上下鋳枠の開口部に挿入され造型空間を形成する上下スクイズプレートとを備え、前記造型空間に充填された鋳型砂を圧縮して上下鋳型を造型するとともに、該造型と同時に上鋳型に受口を形成する。 In addition, a blank frame mold making apparatus according to the present invention includes the above-described receiving port forming apparatus, and further forms an molding space that is inserted into an upper and lower casting frame sandwiching a match plate and an opening of the upper and lower casting frame. An upper and lower squeeze plate is provided, and the mold sand filled in the molding space is compressed to mold the upper and lower molds, and at the same time as the molding, a receiving port is formed in the upper mold.
本発明は、受口形成装置が斜面形成部及び周壁部を備え、これらの間に溝部が形成されているので、造型時に受口を形成するとともに、受口及び湯口への砂粒の混入を防止することを実現する。 According to the present invention, the receiving port forming device includes the slope forming portion and the peripheral wall portion, and the groove portion is formed between them, so that the receiving port is formed at the time of molding, and sand particles are prevented from being mixed into the receiving port and the gate. Realize that.
本発明及び以下の説明において、湯口とは、溶湯を鋳型内に導く最初の流路を意味し、該湯口は、一般的には垂直に設けられ湯道に接続される。受口とは、湯口上部に溶湯が注ぎこまれる部分を意味する。この受口は、注湯しやすいように形成されており、例えばろうと（漏斗）形に成形されることがある。湯口棒とは、鋳型に湯口を作る棒状の模型である。せき（堰）とは、湯口系を構成する部分の一つで、湯道と鋳物部を結ぶ溶湯の流路を意味する。円錐状とは、円錐面を有する形状や、円錐面を底面と平行な平面で切り取った形状を含むものとする。 In the present invention and the following description, the sprue means the first flow path for introducing the molten metal into the mold, and the sprue is generally provided vertically and connected to the runner. The receptacle means a portion where molten metal is poured into the upper part of the gate. The receptacle is formed so as to facilitate pouring, and may be formed into a funnel shape, for example. A gate is a rod-shaped model that creates a gate in a mold. The cough (weir) is one of the parts constituting the gate system, and means a molten metal flow path connecting the runner and the casting part. The conical shape includes a shape having a conical surface and a shape obtained by cutting the conical surface along a plane parallel to the bottom surface.
以下、本発明を適用した抜枠鋳型造型装置（以下、「鋳型造型装置１」という。）について、図１を参照して説明する。図１（ａ）は、マッチプレートから抜型された後に上下鋳型が型合わせされた状態を示す図である。図１（ｂ）は、抜枠途中を示し、上スクイズプレートにより上下鋳型が押し下げられている状態を示す図である。図１（ｃ）は、下スクイズプレートにより上下鋳型が下降されるとともに、上下鋳型から上スクイズプレートが離間した状態を示す図である。 Hereinafter, a blank mold making apparatus to which the present invention is applied (hereinafter referred to as “mold making apparatus 1”) will be described with reference to FIG. FIG. 1A is a view showing a state in which the upper and lower molds are matched with each other after being extracted from the match plate. FIG.1 (b) is a figure which shows the state in which the upper and lower casting_mold | templates are pushed down by the upper squeeze plate in the middle of the frame extraction. FIG. 1C is a view showing a state where the upper and lower molds are lowered by the lower squeeze plate and the upper squeeze plate is separated from the upper and lower molds.
図１に示すように、鋳型造型装置１は、少なくとも、図示しないマッチプレートを挟持する上下鋳枠（上鋳枠２及び下鋳枠３）と、該上下鋳枠の開口部に挿入され造型空間を形成する上下スクイズプレート（上スクイズプレート４及び下スクイズプレート５）とを備える。この鋳型造型装置１は、造型空間に充填された鋳型砂を圧縮して上下鋳型（上鋳型６及び下鋳型７）を造型する。 As shown in FIG. 1, the mold making apparatus 1 includes at least a vertical casting frame (an upper casting frame 2 and a lower casting frame 3) that sandwiches a match plate (not shown), and a molding space inserted into an opening of the upper and lower casting frames. And upper and lower squeeze plates (upper squeeze plate 4 and lower squeeze plate 5). The mold making apparatus 1 compresses mold sand filled in a molding space to mold upper and lower molds (upper mold 6 and lower mold 7).
また、鋳型造型装置１は、上スクイズプレート４に取り付けられて上鋳型６に受口８を形成する受口形成装置として、例えば図２（ａ）に示すような受口形成装置１０又は図２（ｂ）に示すような受口形成装置２０を有している。鋳型造型装置１は、上述の造型と同時に上鋳型６に受口８を形成する装置である。 Moreover, the mold making apparatus 1 is, for example, a receiving port forming apparatus 10 shown in FIG. 2A or FIG. 2 as a receiving port forming apparatus that is attached to the upper squeeze plate 4 and forms the receiving port 8 in the upper mold 6. There is a mouth forming device 20 as shown in FIG. The mold making apparatus 1 is an apparatus for forming the receiving port 8 in the upper mold 6 simultaneously with the above-described molding.
図２で示した受口形成装置１０，２０は、本発明を適用した受口形成装置である。該受口形成装置１０，２０の説明に先立ち、鋳型造型装置１の抜型動作について説明するとともに、この抜型動作に関連して従来の受口形成装置の問題点を説明する。 The receiving port forming apparatuses 10 and 20 shown in FIG. 2 are receiving port forming apparatuses to which the present invention is applied. Prior to the description of the receiving port forming apparatuses 10 and 20, the mold cutting operation of the mold making apparatus 1 will be described, and the problems of the conventional receiving port forming apparatus will be described in relation to the mold cutting operation.
まず、図１を用いて鋳型造型装置１の抜枠工程について説明する。図１の前工程では、スクイズ、抜型、型合わせが行われる。図１（ａ）では、図示しない昇降手段で上昇された下スクイズプレート５と、図示しない昇降手段で下降された上スクイズプレート４とで上下鋳型６，７が挟まれる。このとき、下スクイズプレート５は、モールド受けとして機能する。 First, the blanking process of the mold making apparatus 1 will be described with reference to FIG. In the pre-process of FIG. 1, squeeze, die cutting, and die matching are performed. In FIG. 1A, the upper and lower molds 6 and 7 are sandwiched between a lower squeeze plate 5 raised by an elevator means (not shown) and an upper squeeze plate 4 lowered by an elevator means (not shown). At this time, the lower squeeze plate 5 functions as a mold receiver.
次に、図１（ｂ）に示すように、上スクイズプレート４が下降されるとともに、下スクイズプレート５がこれに同調して下降されることにより、上下鋳型６，７が下降される。この際、上下鋳型６，７は、上下鋳枠２，３から拘束を解かれ、すなわち、上下鋳枠２，３からの保持力が開放された状態とされている。 Next, as shown in FIG. 1B, the upper squeeze plate 4 is lowered, and the lower squeeze plate 5 is lowered in synchronization therewith, whereby the upper and lower molds 6 and 7 are lowered. At this time, the upper and lower molds 6 and 7 are released from the upper and lower casting frames 2 and 3, that is, the holding force from the upper and lower casting frames 2 and 3 is released.
この状態で、上スクイズプレート４が上昇されるとともに、下スクイズプレート５は、上下鋳型６，７を載置させた状態で下降される。この際に、上鋳型６の上面から上スクイズプレートが離間するときに、上鋳型６の上面と上スクイズプレート４の下面との間が負圧となり、外周部から中心部に向けて気流が発生する。本発明者達は、この気流発生の現象を見出し、この気流により、上鋳型６の上面及び外周部の砂粒が中心部に吹き寄せられ、従来の受口形成装置を用いた場合では、上鋳型６に形成された溶湯を受ける受口８から湯口９に砂粒が混入するおそれがある点に着目し、これを解決するために、本発明に係る受口形成装置を見出した。 In this state, the upper squeeze plate 4 is raised, and the lower squeeze plate 5 is lowered with the upper and lower molds 6 and 7 placed thereon. At this time, when the upper squeeze plate is separated from the upper surface of the upper mold 6, a negative pressure is generated between the upper surface of the upper mold 6 and the lower surface of the upper squeeze plate 4, and an air flow is generated from the outer peripheral portion toward the center portion. To do. The present inventors have found the phenomenon of the air flow generation, and by this air flow, the sand particles on the upper surface and the outer peripheral portion of the upper mold 6 are blown toward the center, and in the case of using the conventional receiving port forming apparatus, the upper mold 6 In order to solve this problem, the inventors have found a mouth forming apparatus according to the present invention.
尚、混入した砂粒は、溶湯に巻き込まれ、砂かみ不良の原因となることがある。このような不良対策のため、湯道、堰等の形状を工夫することが考えられるが、完全に防止することができず、また、ストレーナー使用という対策も考えられるが、該ストレーナーをセットする煩雑な作業が必要となり、ストレーナーの購入費用も必要になる等の問題点があった。さらに、気流を抑えるため、上スクイズプレート４の上昇速度を極めて低速にすることも考えられるが、造型速度が遅くなり生産効率の低下を招く。 In addition, the sand particles mixed in may be caught in the molten metal and cause sand bite defects. In order to prevent such defects, it is conceivable to devise shapes such as runners, weirs, etc., but they cannot be completely prevented, and measures such as the use of strainers are also conceivable, but it is troublesome to set the strainers. Troublesome work and the cost of purchasing a strainer. Furthermore, in order to suppress the air flow, it is conceivable to make the ascent speed of the upper squeeze plate 4 extremely low, but the molding speed becomes slow and the production efficiency is lowered.
この現象が生じた後に、図１（ｃ）で示すように、上鋳枠１と上スクイズプレート４が上昇し、モールド受けとして機能する下スクイズプレート５が上下鋳型６，７を載せた状態で下降されて抜枠工程が完了する。 After this phenomenon occurs, as shown in FIG. 1C, the upper casting frame 1 and the upper squeeze plate 4 are raised, and the lower squeeze plate 5 functioning as a mold receiver is placed with the upper and lower molds 6 and 7 placed thereon. It is lowered to complete the blanking process.
次に、図２（ａ）を用いて、上述の問題を解消する本発明を適用した受口形成装置１０について具体的に説明する。受口形成装置１０は、上スクイズプレート４に取り付けられて上鋳型６に受口８を形成する受口形成装置である。 Next, with reference to FIG. 2 (a), a description will be given of the mouth receiving apparatus 10 to which the present invention that solves the above-described problems is applied. The receiving port forming device 10 is a receiving port forming device that is attached to the upper squeeze plate 4 and forms the receiving port 8 in the upper mold 6.
該受口形成装置１０は、上スクイズプレート４と一体化するための取付部１１と、取付部１１から下方側に向けて取付部１１と一体に設けられ、受口８の斜面を形成する先端先細り状の斜面形成部１２と、斜面形成部１２の先端１２ａから取付部１１の端面１１ａまで貫通するように形成され、湯口９を形成する湯口棒１６を挿通可能とする挿通部１３と、斜面形成部１２の基端１２ｂ側で、且つこの基端１２ｂの外側に位置して立ち上がり形成されるとともに、壁面１４ａが外側に向くようにされた周壁部１４とを備える。斜面形成部１２と、周壁部１４との間には、周方向に形成された溝部１５が形成されている。 The receiving port forming device 10 is provided with an attaching portion 11 for integrating with the upper squeeze plate 4, and a tip that is provided integrally with the attaching portion 11 from the attaching portion 11 toward the lower side, and forms a slope of the receiving port 8. A tapered slope forming part 12; an insertion part 13 which is formed so as to penetrate from the tip 12a of the slope forming part 12 to the end surface 11a of the mounting part 11; A peripheral wall portion 14 is formed on the base end 12b side of the forming portion 12 so as to rise and be positioned outside the base end 12b, and the wall surface 14a faces outward. A groove portion 15 formed in the circumferential direction is formed between the slope forming portion 12 and the peripheral wall portion 14.
取付部１１は、円筒状に形成されるとともに外周部にはネジ部１１ｂが形成されている。受口形成装置１０は、この取付部１１のネジ部１１ｂにより、上スクイズプレート４のネジ部が形成された取付孔部４ａに取り付け固定される。 The attachment portion 11 is formed in a cylindrical shape, and a screw portion 11b is formed on the outer peripheral portion. The opening forming device 10 is fixedly attached to the attachment hole portion 4 a in which the screw portion of the upper squeeze plate 4 is formed by the screw portion 11 b of the attachment portion 11.
斜面形成部１２は、例えば円錐状に形成されているとともに、径が小さい方の端部が上述の先端１２ａとなり、径が大きい方の端部が上述の基端１２ｂとなり、この基端１２ｂ側で取付部１１と一体になるように構成されている。ここでは、取付部１１及び斜面形成部１２は、構成を簡素化するため一体部材である。 The slope forming portion 12 is formed in, for example, a conical shape, and an end portion having a smaller diameter is the above-described distal end 12a, and an end portion having a larger diameter is the above-described base end 12b, and this base end 12b side It is comprised so that it may become integral with the attachment part 11. Here, the attachment portion 11 and the slope forming portion 12 are integral members in order to simplify the configuration.
斜面形成部１２と、周壁部１４とは、別体の部材であり、溝部１５を形成するような状態で接合されている。ここで、斜面形成部１２と周壁部１４とは、接着剤等により一体となるようにしてもよいが、ここでは、斜面形成部１２と一体にされた取付部１１を上スクイズプレート４に固定する際に、周壁部１４を斜面形成部１２の基端１２ｂと上スクイズプレート４の下端との間で挟持して一体化している。斜面形成部１２及び後述の斜面形成部２２は、例えばポリエチレン等の樹脂からなり、周壁部１４は、例えば、鉄等の金属からなる。 The slope forming part 12 and the peripheral wall part 14 are separate members and are joined in a state in which the groove part 15 is formed. Here, the slope forming part 12 and the peripheral wall part 14 may be integrated with an adhesive or the like, but here, the mounting part 11 integrated with the slope forming part 12 is fixed to the upper squeeze plate 4. In doing so, the peripheral wall portion 14 is sandwiched and integrated between the base end 12 b of the slope forming portion 12 and the lower end of the upper squeeze plate 4. The slope forming part 12 and the later-described slope forming part 22 are made of, for example, a resin such as polyethylene, and the peripheral wall part 14 is made of, for example, a metal such as iron.
周壁部１４には、挟持するための板状部分１４ｃと、この板状部分１４ｃの外周に沿って立ち上げられるリング状部分１４ｂとが設けられる。リング状部分１４ｂの外側には、壁面１４ａが形成される板状部分１４ｃには、内側に取付部１１を挿通するための挿通孔１４ｄが形成される。 The peripheral wall portion 14 is provided with a plate-like portion 14c for clamping, and a ring-like portion 14b raised along the outer periphery of the plate-like portion 14c. On the outer side of the ring-shaped part 14b, an insertion hole 14d for inserting the attachment portion 11 is formed on the inner side of the plate-like part 14c where the wall surface 14a is formed.
以上のように構成される受口形成装置１０は、前記気流により上鋳型６の上面及び外周部の砂粒が矢印Ｓ１で示すように吹き寄せられたときに、吹き寄せられた砂粒１７を、衝立部材として機能する周壁部１４の壁面１４ａで止めることができる。これにより、受口８及び湯口９への砂粒混入を防止できる。 The receiving port forming apparatus 10 configured as described above uses the sand particles 17 blown as the partition members when the sand particles on the upper surface and the outer peripheral portion of the upper mold 6 are blown by the air flow as indicated by the arrow S1. It can be stopped by the wall surface 14a of the peripheral wall portion 14 that functions. Thereby, sand particle mixing into the receiving port 8 and the gate 9 can be prevented.
さらに、受口形成装置１０は、抜枠工程が進んだときに、周壁部１４で止められた砂粒１７が吹き寄せされてしまった場合にも、周壁部１４及び溝部１５により受口８の外周に形成された混入防止溝１８により、この砂粒１７を収容して受口８及び湯口９への砂粒混入を防止できる。すなわち、混入防止溝１８は、周壁部１４及び溝部１５により、受口８形成時に同時に形成され、衝立としての壁面１４ａで止めた砂が落下した場合に留める機能を有する。 Furthermore, the mouth opening forming device 10 can be attached to the outer periphery of the mouth 8 by the peripheral wall portion 14 and the groove portion 15 even when the sand particles 17 stopped by the peripheral wall portion 14 are blown away when the frame drawing process proceeds. By the formed mixing prevention groove 18, the sand particles 17 can be accommodated to prevent the sand particles from being mixed into the receiving port 8 and the gate 9. In other words, the mixing prevention groove 18 is formed simultaneously with the peripheral wall portion 14 and the groove portion 15 when the receiving port 8 is formed, and has a function of stopping when the sand stopped by the wall surface 14a as a partition falls.
尚、周壁部１４の高さは、１０ｍｍ〜２５ｍｍ程度とされており、この周壁部１４の高さ分だけ上スクイズプレート４が上昇したときには、上鋳型６の上面の周囲と中央部の圧力差が小さくなっている。この状態で、砂粒１７が吹き寄せられた場合には、上述の混入防止溝１８の機能により、混入を防止している。この混入防止溝１８で壁面１４ａで止めた砂粒１７を収容した状態よりさらに、上スクイズプレート４が上昇したときには、上スクイズボード４と上鋳型６の上面の隙間がかなり広くなっており、鋳型上面の周囲と中央部の圧力差が小さく、さらに砂粒が吹き寄せられることはない。 The height of the peripheral wall portion 14 is about 10 mm to 25 mm. When the upper squeeze plate 4 is raised by the height of the peripheral wall portion 14, the pressure difference between the periphery of the upper surface of the upper mold 6 and the central portion. Is getting smaller. In this state, when the sand particles 17 are blown, the mixing prevention groove 18 functions to prevent mixing. When the upper squeeze plate 4 rises further than the state in which the sand particles 17 stopped by the wall surface 14a are accommodated in the mixing prevention groove 18, the gap between the upper squeeze board 4 and the upper mold 6 is considerably widened. The pressure difference between the periphery and the center is small, and no sand particles are blown.
続いて、図２（ｂ）を用いて、上述の問題を解消する本発明を適用した受口形成装置２０について具体的に説明する。受口形成装置２０は、上スクイズプレート４に取り付けられて上鋳型６に受口８を形成する受口形成装置である。 Next, the receiving port forming apparatus 20 to which the present invention that solves the above-described problems is applied will be specifically described with reference to FIG. The receiving port forming device 20 is a receiving port forming device that is attached to the upper squeeze plate 4 and forms the receiving port 8 in the upper mold 6.
該受口形成装置２０は、上スクイズプレート４と一体化するための取付部２１と、取付部２１から下方側に向けて取付部２１と一体に設けられ、受口８の斜面を形成する先端先細り状の斜面形成部２２と、斜面形成部２２の先端２２ａから取付部２１の端面２１ａまで貫通するように形成され、湯口９を形成する湯口棒１６を挿通可能とする挿通部２３と、斜面形成部２２の基端２２ｂ側で、且つこの基端２２ｂの外側に位置して立ち上がり形成されるとともに、壁面２４ａが外側に向くようにされた周壁部２４とを備える。斜面形成部２２と、周壁部２４との間には、周方向に形成された溝部２５が形成されている。 The receiving port forming device 20 is integrally provided with the mounting portion 21 for integration with the upper squeeze plate 4 and the mounting portion 21 downward from the mounting portion 21, and forms a slope of the receiving port 8. A tapered slope forming part 22, an insertion part 23 that is formed so as to penetrate from the tip 22 a of the slope forming part 22 to the end surface 21 a of the mounting part 21, and allows the pouring bar 16 that forms the gate 9 to be inserted, and the slope A peripheral wall portion 24 is formed on the base end 22b side of the forming portion 22 so as to rise from the base end 22b and the wall surface 24a faces outward. Between the slope forming part 22 and the peripheral wall part 24, a groove part 25 formed in the circumferential direction is formed.
取付部２１は、円筒状に形成されるとともに外周部にはネジ部２１ｂが形成されている。受口形成装置２０は、この取付部２１のネジ部２１ｂにより、上スクイズプレート４のネジ部が形成された取付孔部４ａに取り付け固定される。 The attachment portion 21 is formed in a cylindrical shape, and a screw portion 21b is formed on the outer peripheral portion. The opening forming device 20 is fixedly attached to the attachment hole portion 4 a in which the screw portion of the upper squeeze plate 4 is formed by the screw portion 21 b of the attachment portion 21.
斜面形成部２２は、例えば円錐状に形成されているとともに、径が小さい方の端部が上述の先端２２ａとなり、径が大きい方の端部が上述の基端２２ｂとなり、この基端２２ｂ側で取付部２１と一体になるように構成されている。ここでは、取付部２１及び斜面形成部２２は、構成を簡素化するため一体部材である。 The slope forming portion 22 is formed in, for example, a conical shape, and an end portion with a smaller diameter becomes the above-described tip end 22a, and an end portion with a larger diameter becomes the above-described base end 22b, and this base end 22b side It is comprised so that it may become integral with the attachment part 21. Here, the attachment portion 21 and the slope forming portion 22 are integral members in order to simplify the configuration.
斜面形成部２２と、周壁部２４とは、溝部２５が形成された一体部材からなる。換言すると、周壁部２４及び溝部２５は、斜面形成部２２の周囲が段付き状にされていることで形成されている。 The slope forming part 22 and the peripheral wall part 24 are made of an integral member in which a groove part 25 is formed. In other words, the peripheral wall portion 24 and the groove portion 25 are formed by making the periphery of the slope forming portion 22 stepped.
以上のように構成される受口形成装置２０は、前記気流により上鋳型６の上面及び外周部の砂粒が矢印Ｓ２で示すように吹き寄せられたときに、吹き寄せられた砂粒２７を、衝立部材として機能する周壁部２４の壁面２４ａで止めることができる。これにより、受口８及び湯口９への砂粒混入を防止できる。 The receiving port forming apparatus 20 configured as described above uses the sand particles 27 blown as the partition members when the sand particles on the upper surface and the outer peripheral portion of the upper mold 6 are blown by the air flow as indicated by an arrow S2. It can stop at the wall surface 24a of the surrounding wall part 24 which functions. Thereby, sand particle mixing into the receiving port 8 and the gate 9 can be prevented.
さらに、受口形成装置２０は、抜枠工程が進んだときに、周壁部２４で止められた砂粒２７が吹き寄せされてしまった場合にも、周壁部２４及び溝部２５により受口８の外周に形成された混入防止溝２８により、この砂粒２７を収容して受口８及び湯口９への砂粒混入を防止できる。すなわち、混入防止溝２８は、周壁部２４及び溝部２５により、受口８形成時に同時に形成され、衝立としての壁面２４ａで止めた砂が落下した場合に留める機能を有する。 Further, the mouth port forming device 20 is also provided on the outer periphery of the port 8 by the peripheral wall portion 24 and the groove portion 25 even when the sand particles 27 stopped by the peripheral wall portion 24 are blown away when the frame drawing process proceeds. By the formed mixing prevention groove 28, the sand particles 27 can be accommodated to prevent sand particles from mixing into the receiving port 8 and the gate 9. In other words, the mixing prevention groove 28 is formed simultaneously with the peripheral wall portion 24 and the groove portion 25 when the receiving port 8 is formed, and has a function of stopping when the sand stopped by the wall surface 24a as a partition falls.
尚、周壁部２４の高さは、周壁部１４と同様に１０ｍｍ〜２５ｍｍ程度とされており、周壁部２４を有する受口形成装置２０は、周壁部１４を有する受口形成装置１０と同様の効果を有する。 The height of the peripheral wall portion 24 is set to about 10 mm to 25 mm similarly to the peripheral wall portion 14, and the receiving port forming device 20 having the peripheral wall portion 24 is the same as the receiving port forming device 10 having the peripheral wall portion 14. Has an effect.
また、受口形成装置１０，２０を用いた鋳型造型装置及び方法は、鋳型の受口８を成型するカップ状の部材（斜面形成部１２，２２）の周囲にリング状の衝立（周壁部１４，２４）を設けたスクイズプレートで鋳型を造型して、鋳型の受口８の周囲に溝を成型することに特徴を有する。 In addition, the mold making apparatus and method using the receptacle forming apparatuses 10 and 20 is a ring-shaped partition (peripheral wall portion 14) around a cup-shaped member (slope forming portions 12 and 22) for molding the receptacle 8 of the mold. , 24), and a groove is formed around the receiving port 8 of the mold.
以上のように、本発明を適用した受口形成装置１０，２０及びこれを用いた鋳型造型装置や方法は、斜面形成部１２，２２及び周壁部１４，２４を備え、これらの間に溝部１５，２５が形成されているので、造型時に受口８を形成するとともに、受口８及び湯口９への砂粒の混入を防止することを実現する。 As described above, the receiving port forming apparatuses 10 and 20 to which the present invention is applied and the mold making apparatus and method using the same include the slope forming portions 12 and 22 and the peripheral wall portions 14 and 24, and the groove portion 15 therebetween. , 25 are formed, it is possible to form the receiving port 8 during molding and to prevent sand particles from being mixed into the receiving port 8 and the gate 9.
すなわち、受口形成装置１０，２０等は、湯口部への砂粒の混入が回避でき、湯道、堰等の形状工夫の必要がなくすことができ、また、ストレーナーセットの煩雑な作業と購入費用も不要にでき、生産効率の低下を招くことを防止できる。 That is, the receiving port forming apparatuses 10, 20 and the like can avoid the mixing of sand particles into the gate, can eliminate the need for shape adjustments such as runners and weirs, and the complicated work and purchase cost of the strainer set. Can also be eliminated, and it is possible to prevent a decrease in production efficiency.
１ 鋳型造型装置
２ 上鋳枠
３ 下鋳枠
４ 上スクイズプレート
５ 下スクイズプレート
６ 上鋳型
７ 下鋳型
８ 受口
９ 湯口
２０ 受口形成装置
２１ 取付部
２２ 斜面形成部
２３ 挿通部
２４ 周壁部
２５ 溝部
DESCRIPTION OF SYMBOLS 1 Mold making apparatus 2 Upper casting frame 3 Lower casting frame 4 Upper squeeze plate 5 Lower squeeze plate 6 Upper mold 7 Lower mold 8 Receptacle 9 Pouring opening 20 Receptacle forming apparatus 21 Mounting part 22 Slope formation part 23 Insertion part 24 Circumferential wall part 25 Groove
Claims (5)
前記上スクイズプレートと一体化するための取付部と、
前記取付部から下方側に向けて前記取付部と一体に設けられ、前記受口の斜面を形成する先端先細り状の斜面形成部と、
前記斜面形成部の先端から前記取付部の端面まで貫通するように形成され、湯口を形成する湯口棒を挿通可能とする挿通部と、
前記斜面形成部の基端側で、且つこの基端の外側に位置して立ち上がり形成されるとともに、壁面が外側に向くようにされた周壁部とを備え、
前記斜面形成部と、前記周壁部との間には、周方向に形成された溝部が形成されている受口形成装置。 The upper and lower molds are formed by compressing the mold sand filled in the molding space formed by the upper and lower casting frames sandwiching the match plate and the upper and lower squeeze plates inserted into the openings of the upper and lower casting frames to form the molding spaces. In a receiving port forming device that is used in a punched frame mold making device and attached to the upper squeeze plate to form a receiving port in the upper mold,
A mounting portion for integrating with the upper squeeze plate;
A tapered tip-shaped slope forming portion that is provided integrally with the mounting portion from the mounting portion toward the lower side and forms the slope of the receiving port;
An insertion portion that is formed so as to penetrate from the tip of the slope forming portion to the end surface of the attachment portion, and allows insertion of a gate pole that forms a gate.
A peripheral wall portion formed on the base end side of the inclined surface forming portion and standing on the outside of the base end, and having a wall surface facing outward;
A receiving port forming apparatus in which a groove portion formed in the circumferential direction is formed between the slope forming portion and the peripheral wall portion.
さらに、マッチプレートを挟持する上下鋳枠と、該上下鋳枠の開口部に挿入され造型空間を形成する上下スクイズプレートとを備え、
前記造型空間に充填された鋳型砂を圧縮して上下鋳型を造型するとともに、該造型と同時に上鋳型に受口を形成する抜枠鋳型造型装置。
While comprising the receptacle forming device according to any one of claims 1 to 4,
Furthermore, an upper and lower casting frame that sandwiches the match plate, and an upper and lower squeeze plate that is inserted into the opening of the upper and lower casting frame to form a molding space,
A die-casting mold making apparatus that compresses the molding sand filled in the molding space to mold upper and lower molds and simultaneously forms a receiving port in the upper mold.
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| JPH0553752U (en) * | 1991-12-27 | 1993-07-20 | 新東工業株式会社 | Brow squeeze head device |
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