JPH0623645U - Bent hole for blow molding - Google Patents
Bent hole for blow moldingInfo
- Publication number
- JPH0623645U JPH0623645U JP4097192U JP4097192U JPH0623645U JP H0623645 U JPH0623645 U JP H0623645U JP 4097192 U JP4097192 U JP 4097192U JP 4097192 U JP4097192 U JP 4097192U JP H0623645 U JPH0623645 U JP H0623645U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- mold
- valve body
- cylinder body
- vent hole
- 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.)
- Granted
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Abstract
(57)【要約】
【目的】 安価に製作でき、鋳型砂硬化ガスを無駄に消
費せず、しかも硬化ガスがキャビティ部内に十分行き渡
るベントホールを提供する。
【構成】 上端開口(16)を有する筒本体(14)と、筒本体
(14)の上端開口(16)から上下移動自在に挿入した弁体(2
0)と、筒本体(14)の下部と弁体(20)との間に配設した開
弁バネ(24)とから構成する。筒本体(14)の上部の周囲に
弁座(19)を形成する。開弁バネ(24)の押圧力により、弁
体(20)を上方へ押圧付勢して弁体(20)と弁座(19)との間
に通気口(13)を開口させるとともに、弁体(20)を上方か
らの鋳型砂の充填圧力で下方へ移動させ、通気口(13)を
閉止可能に構成する。
(57) [Summary] [Purpose] To provide a vent hole that can be manufactured at low cost, does not wastefully use the molding sand hardening gas, and that allows the hardening gas to sufficiently spread into the cavity. [Constitution] A cylinder body (14) having an upper end opening (16), and a cylinder body
A valve body (2) inserted vertically from the upper opening (16) of (14)
0) and a valve opening spring (24) arranged between the lower portion of the cylinder body (14) and the valve body (20). A valve seat (19) is formed around the upper part of the cylinder body (14). The pressing force of the valve opening spring (24) urges the valve body (20) upward to open the vent hole (13) between the valve body (20) and the valve seat (19), and The body (20) is moved downward by the filling pressure of the mold sand from above so that the vent hole (13) can be closed.
Description
【０００１】[0001]
本考案は、筒本体の上部に通気口を設け、この通気口と筒本体の下端開口とを 通気路で連通させて構成した、吹込式鋳型造型装置に使用されるベントホールに 関する。 The present invention relates to a vent hole used in a blow-molding machine, which is formed by providing a ventilation port on an upper part of a cylinder body and connecting the ventilation hole and a lower end opening of the cylinder body with a ventilation path.
【０００２】[0002]
この種のベントホールは、例えば図２及び図３に示すように、吹込式鋳型造型 装置(１)の金型(２)肉壁に空気抜き通路(７)を透設し、この空気抜き通路(７)に 嵌入される。そしてこのベントホール(12)により、鋳型砂(９)を充填する際に空 気抜き通路(７)からの鋳型砂(９)の流出を防止するのであるが、従来のベントホ ール(12)は、筒本体(14)の上壁(31)に、例えば図７に示すようなスリット(32)や 微小孔からなる通気口(13)を透設しており、この通気口(13)及びこれに連通する 筒本体(14)内の通気路(18)を介して金型(２)外部とキャビティ部(５)内とを常に 連通させていた。 This type of vent hole has, for example, as shown in FIGS. 2 and 3, an air vent passage (7) formed through the wall of the mold (2) of the blow-in mold making apparatus (1). ). The vent hole (12) prevents the mold sand (9) from flowing out of the air vent passage (7) when the mold sand (9) is filled. Has a ventilation hole (13) made of, for example, slits (32) and minute holes as shown in FIG. 7 on the upper wall (31) of the cylinder body (14). The outside of the mold (2) and the inside of the cavity (5) were always communicated with each other via the ventilation passage (18) in the cylinder body (14) communicating with this.
【０００３】[0003]
しかし、金型(２)の内外が常に連通していると、鋳型砂(９)の充填完了後にキ ャビティ部(５)内へ吹き込む鋳型砂硬化用の硬化ガス(10)が、ベントホール(12) の通気口(13)を通って金型(２)の外部へ流出することになる。 However, if the inside and outside of the mold (2) are always in communication with each other, the hardening gas (10) for hardening the molding sand blown into the cavity (5) after the completion of the filling of the molding sand (9) causes the vent hole ( It will flow out of the mold (2) through the vent (13) of (12).
【０００４】 この結果、大量の硬化ガス(10)が無駄に消費されるだけでなく、キャビティ部 (５)中の鋳型砂(９)内に注入口(５)から空気抜き通路(７)に至る間の硬化ガス流 路が形成され、硬化ガス(10)をキャビティ部(５)内の他の部分へ行き渡らせるこ とが困難となって、鋳型砂(９)の硬化不良を発生するという問題があった。As a result, not only a large amount of the curing gas (10) is wasted, but also the mold sand (9) in the cavity (5) reaches the air vent passage (7) from the inlet (5). A hardening gas flow path is formed between them, making it difficult to spread the hardening gas (10) to other parts of the cavity (5), which causes the hardening failure of the mold sand (9). was there.
【０００５】 また、硬化ガス(10)には毒性を有するものがあり、この場合には金型(２)から 流出する硬化ガス(10)の影響を避けるため、作業者は防毒マスクや防塵眼鏡を着 用しなければならず、作業性が悪い問題があった。In addition, some curing gases (10) are toxic, and in this case, the worker must wear a gas mask or dust-proof glasses to avoid the influence of the curing gas (10) flowing out from the mold (2). Had to be worn, and there was a problem with poor workability.
【０００６】 そこで本出願人は先に、筒本体の上壁に通気口を透設し、通気口と筒本体の下 端部開口とを通気路で連通させ、筒本体内に開閉弁を付設し、この開閉弁の閉弁 バネのバネ設定圧力を、鋳型砂充填圧力より低く設定するとともに鋳型砂硬化ガ ス充填圧力よりも高く設定したものを提案した（実願平２−８２８３８号）。Therefore, the present applicant firstly provided a ventilation hole through the upper wall of the cylinder body, and made the ventilation hole and the lower end opening of the cylinder body communicate with each other by a ventilation passage, and provided an opening / closing valve in the cylinder body. Then, a spring setting pressure of the closing spring of the on-off valve was set to be lower than the mold sand filling pressure and higher than the mold sand hardening gas filling pressure (Japanese Patent Application No. 2-82838).
【０００７】 しかしながらこの先考案例のものでは、バネ設定圧力を鋳型砂充填圧力と硬化 ガス充填圧力との中間の僅かな圧力差内に設定しなければならず、設定が困難な うえ、硬化ガス充填圧力が開弁方向に作用することから、硬化ガス充填圧力が高 く偏位すると通気口を閉止できなくなる問題があった。However, in the case of this prior art example, the spring set pressure must be set within a slight pressure difference between the mold sand filling pressure and the hardening gas filling pressure, which is difficult to set and the hardening gas filling is difficult. Since the pressure acts in the valve opening direction, there is a problem that the vent cannot be closed if the hardening gas filling pressure is highly deviated.
【０００８】 また、ベントホールの上壁に設ける通気口は、開口率を大きくして空気を素早 く流出させるものでありながら、しかも、鋳型砂の流出を防止しなければならな いことから、微細な孔等を多数設けなければならず、製作コストが高価につく問 題がある。Further, the vent hole provided on the upper wall of the vent hole has a large opening ratio to allow the air to quickly flow out, and at the same time, it is necessary to prevent the mold sand from flowing out. Since many fine holes must be provided, the manufacturing cost is high.
【０００９】 本考案は、上記問題点を解消して、安価に製作できるうえ、鋳型砂硬化ガスを 無駄に消費することがなく、しかもこの硬化ガスを金型のキャビティ内に十分行 き渡らせて鋳型砂を隅々まで硬化させ、表面が固く高密度に充填されて表面安定 性の良い鋳型を造型できるベントホールを提供することを目的とする。The present invention solves the above-mentioned problems and can be manufactured at low cost, wastes no mold sand hardening gas, and allows this hardening gas to be sufficiently distributed in the cavity of the mold. The purpose of the present invention is to provide a vent hole in which the mold sand is hardened in every corner, and the surface is hard and filled with a high density so that a mold with good surface stability can be produced.
【００１０】[0010]
本考案は、上記目的を達成するため次のように構成したものである。 The present invention is configured as follows to achieve the above object.
【００１１】 （請求項１の考案） 例えば、図１から図６に示すように、上部に通気口(13)を設け、この通気口(1 3)と筒本体(14)の下端開口(17)とを通気路(18)で連通させて構成した吹込式鋳型 造型用ベントホールにおいて、上端開口(16)を有する筒本体(14)と、筒本体(14) の上端開口(16)から上下移動自在に挿入した弁体(20)と、筒本体(14)の下部と弁 体(20)との間に配設した開弁バネ(24)とを具備し、上記筒本体(14)の上部の周囲 に弁座(19)を形成し、上記開弁バネ(24)は、弁体(20)を上方へ押圧付勢して、弁 体(20)と弁座(19)との間に通気口(13)を開口させ、弁体(20)は、上方からの鋳型 砂(９)の充填圧力で下方へ移動して、通気口(13)を閉止可能に構成したものであ る。(Invention of Claim 1) For example, as shown in FIGS. 1 to 6, a vent hole (13) is provided in the upper part, and this vent hole (13) and the lower end opening (17) of the cylinder body (14). ) And the vent passage (18) for communication, in the vent hole for molding, the cylinder body (14) having the upper end opening (16) and the upper and lower openings from the upper end opening (16) of the cylinder body (14). It comprises a valve body (20) movably inserted and a valve opening spring (24) arranged between the lower portion of the cylinder body (14) and the valve body (20). A valve seat (19) is formed around the upper part, and the valve opening spring (24) presses and urges the valve body (20) upward so that the space between the valve body (20) and the valve seat (19) is increased. The ventilation port (13) is opened in the valve body (20), and the valve body (20) is moved downward by the filling pressure of the molding sand (9) from above to close the ventilation port (13). .
【００１２】 (請求項２の考案) 請求項１の構成において、図５あるいは図６に示すように、弁体(20)の上面形 状を、鋳型造型用金型(２)のキャビティ部(５)の内周面(６)形状に一致させたも のである。(Invention of Claim 2) In the structure of Claim 1, as shown in FIG. 5 or 6, the shape of the upper surface of the valve body (20) is changed to the cavity portion () of the mold (2) for molding. The shape is the same as the shape of the inner peripheral surface (6) of 5).
【００１３】 (請求項３の考案) 請求項１又は請求項２の構成において、筒本体(14)と弁体(20)とを係合可能に 構成した係合部(25)を設け、開弁バネ(24)で弁体(20)を押圧付勢して弁体(20)と 弁座(19)との間に通気口(13)を開口する際に係合部(25)を介して筒本体(14)に弁 体(20)を係止させたものである。(Invention of Claim 3) In the construction of Claim 1 or Claim 2, an engagement portion (25) is provided which is configured to engage the cylinder body (14) and the valve body (20), and is opened. When the valve spring (24) presses the valve body (20) to open the vent hole (13) between the valve body (20) and the valve seat (19), the engaging portion (25) is used. The valve body (20) is locked to the cylinder body (14).
【００１４】[0014]
本考案は、鋳型砂(９)の充填圧力が弁体(20)に作用するまでは、開弁バネ(24) の押圧力で弁体(20)が上方に押圧付勢されて通気口(13)が開口しているので、鋳 型砂(９)を充填する際に金型(２)内に残っていた空気は、この通気口(13)から速 やかに排出される。 そして、鋳型砂(９)がベントホール(12)の上部にまで充填されると、この鋳型 砂(９)の充填圧力により弁体(20)が下方に押圧され、通気口(13)が閉止されるの で、この後に充填される硬化ガス(10)はベントホール(12)を設けた空気抜き通路 (７)から流出することがない。 According to the present invention, the valve body (20) is urged upward by the pressing force of the valve opening spring (24) until the filling pressure of the mold sand (9) acts on the valve body (20). The air remaining in the mold (2) when the casting sand (9) is filled is quickly exhausted from this vent hole (13) because the (13) is opened. When the mold sand (9) is filled up to the upper part of the vent hole (12), the valve body (20) is pressed downward by the filling pressure of the mold sand (9), and the vent hole (13) is closed. As a result, the hardening gas (10) charged after this does not flow out from the air vent passage (7) provided with the vent hole (12).
【００１５】[0015]
【考案の効果作用】 本考案は、上記のように構成され作用することから次の効果を奏する。 （１）鋳型砂を充填する際、筒本体と弁体との間に通気口が開口し、金型内の空 気がこの通気口から金型外へ排出されることから、鋳型砂は金型のキャビティ内 に隅々まで充填できるうえ、鋳型砂に気泡等を残さず充填密度を高くすることが できる。[Advantageous Effects of the Invention] The present invention has the following effects because it is configured and operates as described above. (1) When the mold sand is filled, the vent is opened between the cylinder body and the valve body, and the air in the mold is discharged from the vent to the outside of the mold. It is possible to fill every corner of the mold cavity and increase the packing density without leaving bubbles in the mold sand.
【００１６】 （２）鋳型砂の充填後は、ベントホールの通気口が鋳型砂の充填圧力により確実 に閉止されることから、硬化ガスの充填時には硬化ガスが金型から外部に流出す ることがなく、充填圧力により硬化ガスが金型キャビティ内の隅々にまで行き渡 る。この結果、鋳型砂の硬化不良の発生を確実に防止することができ、特に、厚 肉の鋳型を造型する場合であっても、短時間に鋳型砂内部まで均一に硬化でき、 強度の高い鋳型を造型できる。(2) After the mold sand is filled, the vent hole vent hole is surely closed by the mold sand filling pressure, so that the hardening gas flows out of the mold when the hardening gas is filled. There is no pressure, and the filling pressure causes the curing gas to reach every corner of the mold cavity. As a result, it is possible to reliably prevent the curing failure of the molding sand, and in particular, even when molding a thick-walled mold, the inside of the molding sand can be uniformly hardened in a short time, and a mold with high strength can be obtained. Can be molded.
【００１７】 （３）硬化ガスが金型から外部に流出しないので、鋳型造形のコストを低減でき るうえ、作業環境が悪化せず、従って作業者は防毒マスクや防塵眼鏡を着用する 必要がなく、作業性がよい。(3) Since the curing gas does not flow out of the mold, the cost for molding can be reduced and the working environment does not deteriorate, so that the worker does not need to wear a gas mask or dust-proof glasses. , Workability is good.
【００１８】 （４）ベントホールの筒本体と弁体との間に通気口を形成することから、従来技 術のように微小なスリットや孔をベントホール上壁に数多く設ける必要がなく、 安価に製作することができる。(4) Since the vent hole is formed between the cylinder body of the vent hole and the valve element, it is not necessary to provide many minute slits or holes on the upper wall of the vent hole as in the conventional technique, which is inexpensive. Can be manufactured.
【００１９】 （５）弁体上面は微細な孔等を設ける必要がなく平滑面に形成できるので、造形 した鋳型の型離れが良いうえ、金型を開く際に弁体上部に加わっていた充填圧力 が除かれるので、開弁バネの押圧力により弁体を介して鋳型砂が上方へ押し上げ られることになり、このため、造型した鋳型砂が金型内周面から一層離れ易く、 離型操作時での造型品の破損を防ぐことができる。(5) Since it is possible to form a smooth surface on the upper surface of the valve body without providing fine holes, it is easy to separate the molded mold from the mold, and the filling applied to the upper part of the valve body when the mold is opened. Since the pressure is removed, the mold sand is pushed upward through the valve body by the pressing force of the valve opening spring, which makes it easier for the molded sand to be separated from the inner peripheral surface of the mold, and the mold release operation is performed. It is possible to prevent the molded product from being damaged at a certain time.
【００２０】 （６）通気口から筒本体内に流入し、筒本体内面等に付着した鋳型砂は、開弁バ ネの伸縮動作によって掻き落とされるので、内部に付着した鋳型砂により筒本体 内の通気路が封鎖されることを防止する。(6) Since the mold sand that has flowed into the cylinder body from the ventilation port and adhered to the inner surface of the cylinder body and the like is scraped off by the expansion and contraction operation of the valve opening fan, the mold sand that adheres to the inside Prevents the ventilation passages from being blocked.
【００２１】 （７）通気口は弁体と筒本体との間に形成され、従来技術とは異なってベントホ ール上壁に多数の通気口を開口する必要がないことから、弁体の上面形状を鋳型 造型用金型のキャビティ部の内周面形状に容易に一致させることができる。この 結果、キャビティのコーナー部など、内周面が曲面状の部位にあっても安価にベ ントホールを設けることができるので、鋳型砂の充填効率を高めることができ、 造型の歩留りを向上できる。(7) The vent hole is formed between the valve body and the cylinder body, and unlike the prior art, it is not necessary to open a large number of vent holes in the upper wall of the vent hole. The shape can be easily matched with the shape of the inner peripheral surface of the cavity of the mold for molding. As a result, even if the inner peripheral surface is a curved portion such as a corner portion of the cavity, the vent hole can be provided at low cost, so that the efficiency of filling the mold sand can be improved and the yield of molding can be improved.
【００２２】 （８）筒本体と弁体との間に係合部を設け、開弁バネで弁体を押圧付勢して弁体 と弁座との間に通気口を開口する際に係合部を介して筒本体に弁体を係止させた 場合には、空気抜き通路からキャビティ部内へ弁体が必要以上に飛び出さず、こ の結果、鋳型砂充填時に通気口から鋳型砂が流出することを確実に防止できる。(8) An engaging portion is provided between the cylinder body and the valve body, and is engaged when the valve body is pressed and urged by the valve opening spring to open the vent hole between the valve body and the valve seat. When the valve body is locked to the cylinder body through the joint, the valve body does not pop out from the air vent passage into the cavity more than necessary, and as a result, the mold sand flows out from the vent when filling the mold sand. Can be surely prevented.
【００２３】[0023]
以下、本考案の実施例を図面で説明する。 図１乃至図５は本考案の第１実施例を示し、図１はベントホールの縦断斜視図 、図２は鋳型砂充填工程を示す断面図、図３は硬化ガス注入工程を示す断面図で ある。 Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention, FIG. 1 is a vertical perspective view of a vent hole, FIG. 2 is a sectional view showing a mold sand filling step, and FIG. 3 is a sectional view showing a hardening gas injection step. is there.
【００２４】 図２に示すように、鋳型造形装置(１)の金型(２)は上型(３)と下型(４)とから なり、金型(２)内部にキャビティ部(５)が形成してある。As shown in FIG. 2, the mold (2) of the molding apparatus (1) is composed of an upper mold (3) and a lower mold (4), and the cavity (5) is inside the mold (2). Is formed.
【００２５】 上型(３)の上壁(3a)には鋳型砂充填用の注入口(８)が明けてあり、また上型( ３)及び下型(４)の肉壁に複数の空気抜き通路(７)が透設され、各空気抜き通路( ７)にそれぞれベントホール(12)が嵌着してある。 各ベントホール(12)の上部には、図１に示すように、通気口(13)が形成してあ り、下端開口(17)とを通気路(18)で連通してある。これにより、この通気口(13) 及び通気路(18)を介して金型(２)の外部とキャビティ部(５)内とが連通されてい る。The upper wall (3a) of the upper mold (3) has an injection port (8) for filling the mold sand, and a plurality of air vents are provided on the meat walls of the upper mold (3) and the lower mold (4). A passage (7) is transparently provided, and a vent hole (12) is fitted in each air vent passage (7). As shown in FIG. 1, a vent hole (13) is formed in the upper part of each vent hole (12) and communicates with a lower end opening (17) by a vent passage (18). As a result, the outside of the mold (2) and the inside of the cavity (5) are communicated with each other through the ventilation port (13) and the ventilation passage (18).
【００２６】 このベントホール(12)は、図４に示すように、筒本体(14)が空気抜き通路(７) 内に嵌入して固定されており、筒本体(14)の上端開口(16)の周囲に弁座(19)が形 成してある。 筒本体(14)の上端開口(16)から筒本体(14)内へ挿入された弁体(20)は、頭部(2 1)とこの頭部(21)から下方に延出した脚部(23)とで構成されており、弁部(21)の 周囲には前記弁座(19)と対向して弁面(22)が形成してある。As shown in FIG. 4, the vent hole (12) is fixed by fitting the cylinder body (14) into the air vent passage (7), and the upper end opening (16) of the cylinder body (14). A valve seat (19) is formed around the. The valve body (20) inserted into the cylinder body (14) through the upper end opening (16) of the cylinder body (14) has a head (21) and legs extending downward from the head (21). (23) and a valve face (22) is formed around the valve portion (21) so as to face the valve seat (19).
【００２７】 弁体(20)は上下移動可能に配設されており、弁体(20)の脚部(23)と筒本体(14) の下部との間に開弁バネ(24)が架着され、この開弁バネ(24)の押圧力により弁体 (20)が上方へ押圧付勢されて、上記弁座(19)と弁面(22)との間に通気口(13)が形 成される。The valve body (20) is arranged so as to be movable up and down, and a valve opening spring (24) is mounted between the leg portion (23) of the valve body (20) and the lower portion of the cylinder body (14). The valve body (20) is urged upward by the pressing force of the valve opening spring (24), and the vent hole (13) is formed between the valve seat (19) and the valve face (22). It is formed.
【００２８】 筒本体(14)には中心軸(15)と直交して取付ピン(26)が固定されている。一方、 弁体(20)の脚部(23)には、上記取付ピン(26)よりも大径の係合孔(27)が設けてあ り、この係合孔(27)に上記取付ピン(26)が通してある。A mounting pin (26) is fixed to the cylinder body (14) orthogonally to the central axis (15). On the other hand, the leg portion (23) of the valve body (20) is provided with an engagement hole (27) having a diameter larger than that of the mounting pin (26). (26) is through.
【００２９】 以上のように構成されたベントホール(12)は、図４に示すように、弁体(20)が 開弁バネ(24)の押圧力により上方へ移動し、取付ピン(26)と係合孔(27)とからな る係合部(25)を介して弁体(20)が筒本体(14)に係止するとともに、弁座(19)と弁 面(22)との間に通気口(13)が形成される。 一方、図５に示すように、開弁バネ(24)の押圧力に抗して弁体(20)が下方へ押 下げられると、通気口(13)が閉止されるとともに、弁体(20)上面がキャビティ部 内周面(６)と略面一状となるように構成されている。In the vent hole (12) configured as described above, as shown in FIG. 4, the valve body (20) moves upward due to the pressing force of the valve opening spring (24), and the mounting pin (26) The valve body (20) is locked to the cylinder body (14) through the engagement part (25) consisting of the engagement hole (27) and the valve seat (19) and the valve face (22). Vents (13) are formed between them. On the other hand, as shown in FIG. 5, when the valve body (20) is pushed downward against the pressing force of the valve opening spring (24), the vent hole (13) is closed and the valve body (20) is closed. ) The upper surface is configured to be substantially flush with the inner peripheral surface (6) of the cavity.
【００３０】 次に、上記鋳型造形装置(１)を用いて鋳型を造形する工程を説明する。 図２に示すように、上型(３)の上壁(3a)に形成した注入口(８)から、フェノー ル樹脂等のバインダを混入した鋳型砂(９)が圧力が３kg/cm2の圧縮空気(30)とと もに投入され、金型(２)のキャビティ部(５)内に充填される。この時、キャビテ ィ部(５)内に残っていた空気は、ベントホール(12)の通気口(13)及び通気路(18) を介して空気抜き通路(７)から排出され、鋳型砂(９)がキャビティ部(５)内の隅 々まで充填される。Next, a process of forming a mold using the mold forming apparatus (1) will be described. As shown in Fig. 2, from the inlet (8) formed in the upper wall (3a) of the upper mold (3), the mold sand (9) mixed with a binder such as phenol resin has a pressure of 3 kg / cm 2 . It is introduced together with compressed air (30) and filled in the cavity (5) of the mold (2). At this time, the air remaining in the cavity portion (5) is discharged from the air vent passage (7) through the vent hole (12) of the vent hole (12) and the vent passage (18), and the mold sand (9) is discharged. ) Is filled into every corner of the cavity (5).
【００３１】 鋳型砂(９)を充填し終ると、図３に示すように、注入口(８)から炭酸ガスや気 体エステルあるいはアミン等の硬化ガス(10)が約１kg/cm2の圧力で注入される。 このとき、図５に示すようにベントホール(12)の通気口(13)は鋳型砂(９)の充填 圧力により閉止されており、硬化ガス(10)は空気抜き通路(７)から漏れることが なく、キャビティ(2a)内の隅々にまで行きわたって、鋳型砂(９)中のバインダと 反応する。この結果、鋳型砂(９)が硬化して鋳型(11)が造形される。After the mold sand (9) is completely filled, as shown in FIG. 3, the curing gas (10) such as carbon dioxide gas, gaseous ester or amine is injected from the inlet (8) at a pressure of about 1 kg / cm 2 . Injected. At this time, the vent hole (12) of the vent hole (12) is closed by the filling pressure of the mold sand (9) as shown in FIG. 5, and the hardening gas (10) may leak from the air vent passage (7). Instead, it spreads to every corner of the cavity (2a) and reacts with the binder in the mold sand (9). As a result, the mold sand (9) is hardened and the mold (11) is modeled.
【００３２】 鋳型砂(９)の硬化が完了すると金型(２)は上型(３)と下型(４)が開かれ、造形 された鋳型(11)が取り出される。このとき、造形された鋳型(11)はベントホール (12)の弁体(20)を介して開弁バネ(24)で押圧されるので、金型(２)からの型離れ がよい。When the hardening of the mold sand (9) is completed, the upper mold (3) and the lower mold (4) of the mold (2) are opened, and the molded mold (11) is taken out. At this time, since the molded mold (11) is pressed by the valve opening spring (24) through the valve body (20) of the vent hole (12), the mold can be separated from the mold (2) well.
【００３３】 なお、開弁バネ(24)は弁体(20)の上下移動に伴って上下に伸縮することから、 通気口(13)から侵入して筒本体(14)の内面に付着した微細な鋳型砂(９)が開弁バ ネ(24)の伸縮動作により掻き落とされ、通気路(18)が閉塞されることがない。Since the valve opening spring (24) expands and contracts up and down as the valve body (20) moves up and down, the fine particles adhering to the inner surface of the cylinder body (14) through the vent hole (13). The mold sand (9) is scraped off by the expansion and contraction operation of the valve opening fan (24), and the ventilation passage (18) is not blocked.
【００３４】 図６は本考案の第２実施例を示し、キャビティ部内周面(６)の湾曲部に設けた 空気抜き通路(７)へ嵌着されるベントホール(12)の縦断面図を示す。FIG. 6 shows a second embodiment of the present invention, showing a vertical sectional view of a vent hole (12) fitted into an air vent passage (7) provided in a curved portion of an inner peripheral surface (6) of a cavity. .
【００３５】 この実施例では、上記第１実施例と異なり、係合部(25)の取付ピン(26)が弁体 (20)の脚部(23)に固定してあり、筒本体(14)に設けた縦長の係合孔(28)に係合し てある。 また、弁座(19)は筒本体(14)の上部の周囲に形成してあればよく、本実施例で は筒本体(14)の上部の空気抜き通路(７)の内面に形成してある。In this embodiment, unlike the first embodiment, the mounting pin (26) of the engaging portion (25) is fixed to the leg portion (23) of the valve body (20), and the cylinder body (14 ) Is engaged with a vertically long engaging hole (28). The valve seat (19) may be formed around the upper portion of the cylinder body (14), and in this embodiment, it is formed on the inner surface of the air vent passage (7) above the cylinder body (14). .
【００３６】 なお、上記第１実施例及び第２実施例では、いずれも係合部(25)を係合ピン(2 6)と係合孔(27・28)で構成したが、これに代えて筒本体(14)や弁体脚部(23)に突 起を形成する等、他の適当な係合手段で構成することができる。In each of the first and second embodiments, the engaging portion (25) is composed of the engaging pin (26) and the engaging hole (27/28), but instead of this, Other suitable engaging means such as forming protrusions on the cylinder body (14) and the valve body leg (23) can be used.
【００３７】 また、係合部(25)は弁体(20)のキャビティ部(５)内への飛び出しを防止するも のであるから、例えば開弁バネ(24)の両端をそれぞれ筒本体(14)と弁体(20)とに 固定した場合には係合部(25)を省略することも可能である。Further, since the engagement portion (25) prevents the valve body (20) from protruding into the cavity portion (5), for example, both ends of the valve opening spring (24) are respectively connected to the cylinder body (14). ) And the valve body (20), the engaging portion (25) can be omitted.
【図１】第１実施例を示す、ベントホールの縦断斜視図
である。FIG. 1 is a vertical perspective view of a vent hole showing a first embodiment.
【図２】鋳型砂の充填工程を示す、鋳型造形装置の縦断
面図である。FIG. 2 is a vertical cross-sectional view of a mold shaping apparatus showing a step of filling mold sand.
【図３】硬化ガスの注入工程を示す、図２相当図であ
る。FIG. 3 is a view corresponding to FIG. 2, showing a step of injecting a hardening gas.
【図４】通気口を開弁した状態のベントホールの縦断面
図である。FIG. 4 is a vertical cross-sectional view of a vent hole with a vent port opened.
【図５】通気口を閉止した状態の図４相当図である。FIG. 5 is a view corresponding to FIG. 4 in a state in which a vent is closed.
【図６】第２実施例を示す、図５相当図である。FIG. 6 is a view corresponding to FIG. 5, showing a second embodiment.
【図７】従来技術を示す、縦断斜視図である。FIG. 7 is a vertical perspective view showing a conventional technique.
２…鋳型造型用金型、５…キャビティ部、６…キャビテ
ィ部内周面、９…鋳型砂、１３…通気口、１４…筒本
体、１６…上端開口、１７…下端開口、１８…通気路、
１９…弁座、２０…弁体、２４…開弁バネ、２５…係合
部。2 ... Mold for mold making, 5 ... Cavity part, 6 ... Cavity part inner peripheral surface, 9 ... Mold sand, 13 ... Vent hole, 14 ... Cylinder body, 16 ... Upper end opening, 17 ... Lower end opening, 18 ... Ventilation path,
19 ... Valve seat, 20 ... Valve body, 24 ... Valve opening spring, 25 ... Engagement part.
Claims (3)
3)と筒本体(14)の下端開口(17)とを通気路(18)で連通さ
せて構成した吹込式鋳型造型用ベントホールにおいて、 上端開口(16)を有する筒本体(14)と、筒本体(14)の上端
開口(16)から上下移動自在に挿入した弁体(20)と、筒本
体(14)の下部と弁体(20)との間に配設した開弁バネ(24)
とを具備し、 筒本体(14)の上部の周囲に弁座(19)を形成し、 上記開弁バネ(24)は、弁体(20)を上方へ押圧付勢して、
弁体(20)と弁座(19)との間に通気口(13)を開口させ、 弁体(20)は、上方からの鋳型砂(９)の充填圧力で下方へ
移動して、通気口(13)を閉止可能に構成したことを特徴
とする、吹込式鋳型造型用ベントホール。1. A ventilation hole (13) is provided on the upper part, and the ventilation hole (1)
3) and the lower end opening (17) of the cylinder body (14) are connected by a ventilation path (18) in a blow-type mold making vent hole, a cylinder body (14) having an upper end opening (16), A valve body (20) inserted movably up and down from the upper end opening (16) of the cylinder body (14) and a valve opening spring (24) arranged between the lower part of the cylinder body (14) and the valve body (20). )
And a valve seat (19) is formed around the upper part of the cylinder body (14), and the valve opening spring (24) presses and biases the valve body (20) upward,
The ventilation port (13) is opened between the valve body (20) and the valve seat (19), and the valve body (20) moves downward due to the filling pressure of the mold sand (9) from above to vent the air. Vent hole for blow mold making, characterized in that the mouth (13) can be closed.
(２)のキャビティ部(５)の内周面(６)形状に一致させ
た、請求項１に記載の吹込式鋳型造型用ベントホール。2. A mold for molding a valve body (20) having a top surface shape
The vent hole for blow molding according to claim 1, wherein the shape is the same as that of the inner peripheral surface (6) of the cavity (5) of (2).
5)を設け、開弁バネ(24)で弁体(20)を押圧付勢して弁体
(20)と弁座(19)との間に通気口(13)を開口する際に係合
部(25)を介して筒本体(14)に弁体(20)を係止させた、請
求項１又は請求項２に記載の吹込式鋳型造型用ベントホ
ール。3. An engagement part (2) between the cylinder body (14) and the valve body (20).
5) is provided and the valve body (20) is pressed and biased by the valve opening spring (24) to
The valve body (20) is locked to the cylinder body (14) through the engaging portion (25) when the vent hole (13) is opened between the valve body (20) and the valve seat (19), The vent hole for blow-mold molding according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4097192U JPH0741552Y2 (en) | 1992-05-22 | 1992-05-22 | Bent hole for blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4097192U JPH0741552Y2 (en) | 1992-05-22 | 1992-05-22 | Bent hole for blow molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0623645U true JPH0623645U (en) | 1994-03-29 |
| JPH0741552Y2 JPH0741552Y2 (en) | 1995-09-27 |
Family
ID=12595347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4097192U Expired - Lifetime JPH0741552Y2 (en) | 1992-05-22 | 1992-05-22 | Bent hole for blow molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741552Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117325494A (en) * | 2023-11-13 | 2024-01-02 | 玉环市光明眼镜制造股份有限公司 | Oil press for manufacturing glasses legs |
-
1992
- 1992-05-22 JP JP4097192U patent/JPH0741552Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117325494A (en) * | 2023-11-13 | 2024-01-02 | 玉环市光明眼镜制造股份有限公司 | Oil press for manufacturing glasses legs |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741552Y2 (en) | 1995-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7575427B2 (en) | Mold for foam molding, method of manufacturing urethane foam, and urethane foam | |
| JP3151485B2 (en) | Non-resin fluid injection molding method | |
| SE503969C2 (en) | Sarg | |
| JPH0741552Y2 (en) | Bent hole for blow molding | |
| KR200324439Y1 (en) | mold for injection molding | |
| US3989089A (en) | Hollow core molding device for use in shell mold | |
| US5911267A (en) | Cope with bore for gassing cores | |
| CA2434738C (en) | Method of manufacturing concrete form | |
| JPH03224719A (en) | Mold for manufacture of hollow molded product | |
| JP3644423B2 (en) | Bent plug and mold for molding | |
| JPS62197243A (en) | Molding method for cold box core | |
| KR100542253B1 (en) | Polyurethane Foam Forming Method | |
| JPS59124813A (en) | Preparation of helmet | |
| JPS5924492Y2 (en) | Synthetic resin injection mold | |
| JPH10264214A (en) | Method and apparatus for fluid compression of injection molded plastic material | |
| JP3410623B2 (en) | Hollow core molding machine | |
| JPS604743Y2 (en) | Mold equipment for synthetic resin injection molding | |
| JPS6018326A (en) | Manufacture of hollow molded article with additional part | |
| JPH07155899A (en) | Gas curing mold making equipment | |
| JPH0222113Y2 (en) | ||
| JP3113925B2 (en) | Core type for disk rotor molding | |
| JPH02211935A (en) | Metallic mold for molding in cold box method | |
| KR20030097520A (en) | apparatus for supplying a core sand for manufacturing a moulding core | |
| JPS5925630Y2 (en) | Mold equipment for synthetic resin injection molding | |
| JPH06206242A (en) | Check valve of mold for closed injection |