JPH0570566B2 - - Google Patents
Info
- Publication number
- JPH0570566B2 JPH0570566B2 JP60182734A JP18273485A JPH0570566B2 JP H0570566 B2 JPH0570566 B2 JP H0570566B2 JP 60182734 A JP60182734 A JP 60182734A JP 18273485 A JP18273485 A JP 18273485A JP H0570566 B2 JPH0570566 B2 JP H0570566B2
- Authority
- JP
- Japan
- Prior art keywords
- shielding film
- product
- filling material
- shielding
- negative pressure
- 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
- 239000000463 material Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 21
- 238000000465 moulding Methods 0.000 claims description 21
- 239000013618 particulate matter Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、原型部材に遮蔽膜を密着し、この
遮蔽膜の原型部材に対して反対側に、粒子状物か
らなる充填材料を充填し、この充填材料側を負圧
にして遮蔽膜を充填材料側に吸着し、ついで、原
型部材を離型してのちの空洞内に製品材料を流入
し硬化するようにした成型方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a method in which a shielding film is closely attached to a prototype member, and a filling material made of particulate matter is filled on the opposite side of the shielding film with respect to the prototype member. This invention relates to a molding method in which a negative pressure is applied to the filling material side so that the shielding film is adsorbed to the filling material side, and then the prototype member is released from the mold, and then the product material is flowed into the cavity and cured.
［従来の技術］
従来の成型方法は、金属、樹脂などからなる固
体物を成型してすでに型体として形成された金型
などを用いて、その金型内に注湯することにより
所定の成型製品を得る構成とされてきた。[Prior art] The conventional molding method uses a mold that has already been formed by molding a solid object made of metal, resin, etc., and pours the metal into the mold to form a predetermined shape. It has been considered as a configuration for obtaining products.
上記成型方法であれば、金型の製作に手間と費
用がかかるだけでなく、製品の取り出しなどに労
力と時間を要し、また、金型が固体物からなるこ
とから、多種多様な金型を常備しておく必要があ
ることから、これらの保管が面倒である。 With the above molding method, not only does it take time and effort to manufacture the mold, it also takes time and effort to take out the product, and since the mold is made of solid material, it requires a wide variety of molds. Since it is necessary to keep these on hand at all times, it is troublesome to store them.
そのため、たとえば、特公昭50−8409号公報に
開示されているように、上記金型によらず、粒子
状物が負圧吸引により固結化し、負圧吸引の解除
により固結が解除されることを利用してして、鋳
造製品を容易に得る鋳造方法が提案されている。 Therefore, for example, as disclosed in Japanese Patent Publication No. 50-8409, regardless of the mold described above, particulate matter is solidified by negative pressure suction, and the solidification is released by releasing the negative pressure suction. A casting method has been proposed that takes advantage of this fact to easily obtain cast products.
この鋳造方法は、原型部材に遮蔽部材を密着
し、この遮蔽部材を有する原型部材の外周に粒子
状物を充填し、この粒子状物側を負圧にして上記
遮蔽部材を粒子状物側に吸着し、ついで、上記原
型部材を離型して空洞を形成し、この空洞内に製
品材料を流入して硬化する工程を有するものであ
る。 In this casting method, a shielding member is closely attached to a prototype member, the outer periphery of the prototype member having this shielding member is filled with particulate matter, and the shielding member is placed on the particulate matter side by applying negative pressure to the particulate matter side. This method includes the steps of adsorbing, then releasing the original mold member to form a cavity, and flowing the product material into the cavity for curing.
［発明が解決しようとする問題点］
しかし、上記公報による鋳造方法においては、
遮蔽膜として通気性をもたない樹脂フイルムなど
を用いている。[Problems to be solved by the invention] However, in the casting method according to the above publication,
A non-breathable resin film or the like is used as the shielding membrane.
こうした通気性をもたない遮蔽膜を用いると、
つぎの問題点がある。 When using such a shielding membrane that does not have air permeability,
There are the following problems.
つまり、開閉バルブとかその配管を断熱のため
覆うカバー体を製品として得るに当つて、その断
熱のため製品を、発泡性樹脂とするのが一般的で
あるが、この場合、たとえばポリウレタン樹脂を
重合反応によつて得る際に20〜33℃の温度範囲に
おいてフレオン（登録商標名）ガスが発生し、こ
のフレオン（登録商標名）ガスが発泡気泡の外部
へ排出される。 In other words, when producing cover bodies that cover on-off valves and their piping for heat insulation purposes, the product is generally made of foamed resin.In this case, for example, polyurethane resin is polymerized. During the reaction, Freon (registered trademark) gas is generated in a temperature range of 20 to 33°C, and this Freon (registered trademark) gas is discharged to the outside of the foamed cells.
そのことから、発泡による製品材料と遮蔽膜と
の間にこれらフレオン（登録商標名）ガスが溜
り、これにより、製品の外周部に小さな気泡また
は凹みが残る結果となる。 As a result, these Freon(R) gases accumulate between the foamed product material and the shielding membrane, resulting in small bubbles or depressions remaining around the outer periphery of the product.
こうした気泡または凹みは、欠陥品を生じた
り、製品価値を下げたりするので、好ましくな
い。 Such air bubbles or dents are undesirable because they may result in defective products or reduce product value.
この発明は、上記問題に鑑みてなされたもので
あつて、気泡または凹みの発生を有効に抑えるこ
とにより、欠陥品をなくし、しかも製品価値を高
めるようにすることを目的とする。 This invention has been made in view of the above problems, and aims to eliminate defective products and increase product value by effectively suppressing the generation of bubbles or dents.
［問題点を解決するための手段］
上記問題を解決するため、この発明の成型方法
は、原型部材に遮蔽膜を密着し、この遮蔽膜の原
型部材に対して反対側に、粒子状物からなる充填
材料を充填し、この充填材料側を負圧にして遮蔽
膜を充填材料側に吸着し、ついで、原型部材を離
型してのちの空洞内に製品材料を流入し硬化する
ようにした成型方法において、上記製品材料を、
発泡性樹脂とし、かつ遮蔽膜に、多数のガス抜き
孔を形成してある。[Means for Solving the Problems] In order to solve the above-mentioned problems, the molding method of the present invention provides a molding method in which a shielding film is closely attached to a master mold member, and a particulate matter is removed from the shielding film on the opposite side of the master mold member. The filling material was filled with a negative pressure, and the shielding film was adsorbed to the filling material side.Then, the prototype member was released, and the product material was allowed to flow into the cavity and harden. In the molding method, the above product material is
It is made of foamable resin and has a large number of gas vent holes formed in the shielding film.
［作用］
上記構成でなるこの発明によれば、遮蔽膜に設
けたガス抜き孔により、発泡時に発生するガスや
残留エアーなどが製品材料側から遮蔽膜を通じて
排除される。[Function] According to the present invention having the above-mentioned configuration, gas generated during foaming, residual air, etc. are removed from the product material side through the shielding film by the gas vent holes provided in the shielding film.
［実施例］
以下、この発明の一実施例を図面にしたがつて
説明する。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図において、１は原型部材で、ここでは理
解しやすくするため、球状のものを例示してあ
る。 In FIG. 1, reference numeral 1 denotes a prototype member, and for ease of understanding, a spherical member is illustrated here.
この原型部材１は、木型、粘土、スチロールな
どによつて形成したり、または現物をそのまま用
いることもある。 The prototype member 1 may be formed from a wooden mold, clay, styrene, or the like, or may be used as it is.
２，２は遮蔽膜で、ポリエステル、アルミ箔ま
たはポリエチレンなどを適宜選定し、ここにおい
て、２枚の樹脂のフイルムからなる。 2, 2 is a shielding film, which is made of polyester, aluminum foil, polyethylene, or the like, and is made of two resin films.
これら２枚の遮蔽膜２，２を原型部材１を介し
て対向状に設け、つぎに第２図矢印のように約
100℃に加熱しつつ、両遮蔽膜２，２間を通して
吸引し、これにより、原型部材１に遮蔽膜２，２
を密着させる。 These two shielding films 2, 2 are provided facing each other with the prototype member 1 in between, and then approximately
While heating to 100°C, suction is applied between both the shielding films 2, 2, thereby applying the shielding films 2, 2 to the prototype member 1.
Close contact.
この場合、常温で行なうこともできる。 In this case, it can also be carried out at room temperature.
こうして遮蔽膜２，２が密着された原型部材１
を、第３図のように上下１対の成型用枠３，３間
に挟みつけて保持し、原型部材１を両成型用枠
３，３内に位置させる。 The prototype member 1 with the shielding films 2, 2 in close contact with each other in this way
is held between a pair of upper and lower molding frames 3, 3 as shown in FIG. 3, and the prototype member 1 is positioned within both molding frames 3, 3.
ここで、４は抑え枠を示し、また、５はフイル
タつき吸引パイプで、各成型用枠３，３に設けら
れ、その吸引パイプ５には、図示しないバルブを
介して吸引ポンプ（図示省略）が接続されてい
る。 Here, 4 indicates a restraining frame, and 5 is a suction pipe with a filter, which is provided in each molding frame 3, 3, and the suction pipe 5 is connected to a suction pump (not shown) via a valve (not shown). is connected.
上記のように、遮蔽膜２つき原型部材１を保持
しつつ、各成型用枠３，３内に、粒子状物からな
る充填材料６を吸引パイプ５を利用して流入して
充填し、上記抑え枠４で全体を仮止めする。 As described above, while holding the original member 1 with the shielding film 2, the filling material 6 made of particulate matter is flowed into each molding frame 3, 3 using the suction pipe 5, and filled. Temporarily fix the whole thing with the holding frame 4.
この場合、バイブレーシヨンを付与することも
できる。 In this case, vibration can also be applied.
この状態で矢印のように吸引パイプ５を通して
成型用枠３，３内を負圧吸引して減圧し、外部の
大気圧との圧力差によつて充填材料６を固結化す
る。その際、両遮蔽膜２，２間への負圧吸引は解
除される。 In this state, negative pressure is sucked into the molding frames 3, 3 through the suction pipe 5 as shown by the arrow to reduce the pressure, and the filling material 6 is solidified by the pressure difference with the outside atmospheric pressure. At this time, the negative pressure suction between the two shielding films 2, 2 is released.
これにより、上記負圧吸引状態を保持しつつ、
第４図に示すように、上下の成型用枠３，３を離
反させる。その際、成型用枠３，３は、ゴムまた
はポリエチレンフイルムなどからなる閉塞カバー
７，７で閉止させる。 As a result, while maintaining the negative pressure suction state,
As shown in FIG. 4, the upper and lower molding frames 3, 3 are separated. At this time, the molding frames 3, 3 are closed with closing covers 7, 7 made of rubber, polyethylene film, or the like.
この離反により、原型部材１が単独に取り出さ
れる。 As a result of this separation, the original model member 1 is taken out individually.
そののち、第５図に示すように、両成型用枠
３，３を上記負圧吸引状態のまま再び合体させ
る。 Thereafter, as shown in FIG. 5, both molding frames 3, 3 are brought together again while maintaining the negative pressure suction state.
この合体により、原型部材１（第１図）に対応
した球形の空洞８が形成され、その空洞８内に、
両遮蔽膜２，２間を通じて製品材料９を供給する
（第６図）。 By this combination, a spherical cavity 8 corresponding to the prototype member 1 (FIG. 1) is formed, and within the cavity 8,
Product material 9 is supplied between both shielding films 2, 2 (FIG. 6).
この製品材料９は、発泡性樹脂液であり、たと
えば、ポリウレタン原液の流入により、空洞８内
で重合反応を生じ、その硬化に伴なつて第６図の
ようにポリウレタン製の製品１０を得る。 This product material 9 is a foamable resin liquid, and a polymerization reaction occurs in the cavity 8 by the inflow of a polyurethane stock solution, and as it hardens, a polyurethane product 10 is obtained as shown in FIG. 6.
その際、20〜33℃で各気泡体からフレオン（登
録商標名）ガスが発生するが、このフレオン（登
録商標名）ガスが外部に流出することから、この
発明では、遮蔽膜２，２にガス抜き孔（図示省
略）を形成しておく。 At that time, Freon (registered trademark) gas is generated from each bubble at 20 to 33°C, but since this Freon (registered trademark) gas flows out to the outside, in this invention, the shielding films 2, 2 are A gas vent hole (not shown) is formed in advance.
このガス抜き孔は、たとえば、直径約0.01mmの
ものを互いに10mm程度の間隔で配列する。 The gas vent holes are, for example, about 0.01 mm in diameter and arranged at intervals of about 10 mm.
こうしたガス抜き孔の存在により、上記で発生
したフレオン（登録商標名）ガスが流出して遮蔽
膜２内に溜ろうとしても、その外部に排除され、
吸引により成型用枠３，３外へ排出される。ここ
には、残留エアーも含まれる。 Due to the presence of these gas vent holes, even if the Freon (registered trademark) gas generated above flows out and attempts to accumulate inside the shielding membrane 2, it is removed to the outside.
It is discharged outside the molding frames 3, 3 by suction. This also includes residual air.
なお、製品１０はつぎに同様の成型を行なう必
要がある場合には、第７図に示すように、吸引し
たまま両成型用枠３，３を離反させて取り出す工
程を踏み、その必要性がなければ、第８図に示す
ように、吸引パイプ５を通じての負圧吸引を解除
して充填材料６を排除することにより、同時に製
品１０を取り出し、あとは、必要なばり取りなど
を行なつて製品としての仕上げを行なう。 In addition, if the product 10 needs to be molded in the same way next time, as shown in FIG. For example, as shown in FIG. 8, by releasing the negative pressure suction through the suction pipe 5 and removing the filling material 6, the product 10 is taken out at the same time, and then the product 10 is removed by performing necessary deburring. Perform the finishing touches.
上記のように、ガス抜き孔を形成した遮蔽膜
２，２を用いて発泡するので、製品１０に気泡と
か凹みが残ることがなく、そのことから、製品価
値が高められる。 As described above, since foaming is performed using the shielding films 2, 2 in which gas vent holes are formed, no air bubbles or dents remain in the product 10, which increases the product value.
なお、上記ガス抜き孔は吸引時に通気作用を伴
なうが、その通気作用に対して充填材料を固結化
することができる程度に負圧吸引の能力を設定す
ることはいうまでもない。 It should be noted that the above-mentioned gas vent holes are accompanied by a ventilation effect during suction, and it goes without saying that the ability of negative pressure suction is set to such an extent that the filling material can be solidified in response to the ventilation effect.
また、上記実施例において、成型用枠３，３を
上下に２分割する構成について説明したけれど
も、たとえば、上方に開口をもつた有底筒状の成
型用枠を構成し、この枠内に上記遮蔽膜２，２で
被覆された複数の棒状原型部材１をその上方開口
から垂直方向へ互いに平行に装填したのち、上記
充填材料６を充填し、所定の空洞８が形成される
ように、上記原型部材１を成型用枠の上方開口か
ら抜き取るようにしてもよい。この場合、上記原
型部材１の抜き取りを容易にするため、遮蔽膜
２，２との間にポリエチレンのような滑り摩擦抵
抗の小さな剥離膜を介装してもよいことはいうま
でもない。 In addition, in the above embodiment, a configuration in which the molding frames 3, 3 are divided into upper and lower halves was explained. After loading a plurality of rod-shaped prototype members 1 covered with shielding films 2, 2 vertically and parallel to each other from their upper openings, the above-mentioned filling material 6 is filled, and the above-mentioned filling material 6 is filled so that a predetermined cavity 8 is formed. The original member 1 may be extracted from the upper opening of the molding frame. In this case, in order to facilitate extraction of the prototype member 1, it goes without saying that a peeling film with low sliding friction resistance, such as polyethylene, may be interposed between the shielding films 2, 2.
その他、この発明の技術内容を逸脱しない範囲
内で、各種の変形手段が案出されることはいうま
でもない。 It goes without saying that various other modifications can be devised without departing from the technical content of the present invention.
［発明の効果］
以上のように、この発明によれば、遮蔽膜に設
けたガス抜き孔により、発泡時に発生するガスや
残留エアーなどが製品材料側から遮蔽膜を通じて
排除されるように構成されているので、気泡また
は凹みの発生が有効に抑えられて、欠陥品を生じ
ないばかりか、製品価値を高めることができる。[Effects of the Invention] As described above, according to the present invention, gases generated during foaming, residual air, etc. are removed from the product material side through the shielding film by the gas vent holes provided in the shielding film. Therefore, the generation of bubbles or dents can be effectively suppressed, and not only can defective products not be produced, but the product value can be increased.
第１図はこの発明の一実施例である原型部材を
遮蔽膜で包む工程を示す説明図、第２図は加熱に
より遮蔽膜を原型部材に密着させる工程を示す説
明図、第３図は遮蔽膜つき原型部材を成型用枠内
に保持して充填材料を充填してのち負圧吸引を行
なう工程を示す断面図、第４図は原型部材を離型
する工程を示す断面図、第５図は製品材料を流入
する工程を示す断面図、第６図は製品材料が反応
し硬化する工程を示す断面図、第７図は負圧吸引
しつつ製品を取り出す工程を示す断面図、第８図
は充填材料とともに製品を取り出す工程を示す断
面図である。
１……原型部材、２……遮蔽膜、６……充填材
料、８……空洞、９……製品材料。
FIG. 1 is an explanatory diagram showing a process of wrapping a prototype member with a shielding film, which is an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a process of bringing the shielding film into close contact with the prototype member by heating. FIG. FIG. 4 is a cross-sectional view showing the process of holding the film-attached prototype member in a molding frame and filling it with a filling material, followed by negative pressure suction; FIG. 4 is a cross-sectional view showing the process of releasing the prototype member from the mold; FIG. 6 is a sectional view showing the process of introducing the product material, FIG. 6 is a sectional view showing the process of reacting and hardening the product material, FIG. 7 is a sectional view showing the process of taking out the product while suctioning negative pressure, and FIG. 8 FIG. 3 is a cross-sectional view showing the process of taking out the product together with the filling material. 1... Prototype member, 2... Shielding film, 6... Filling material, 8... Cavity, 9... Product material.
Claims (1)
型部材に対して反対側に、粒子状物からなる充填
材料を充填し、この充填材料側を負圧にして遮蔽
膜を充填材料側に吸着し、ついで、原型部材を離
型してのちの空洞内に製品材料を流入し硬化する
ようにした成型方法において、上記製品材料を、
発泡性樹脂とし、かつ遮蔽膜に、多数のガス抜き
孔を形成したことを特徴とする成型方法。1. A shielding film is closely attached to the prototype member, and a filling material made of particulate matter is filled on the opposite side of the shielding film to the prototype member, and the filling material side is subjected to negative pressure, and the shielding film is placed on the filling material side. In a molding method in which the product material is adsorbed and then released from the mold, the product material is allowed to flow into the cavity and harden.
A molding method characterized in that a foamable resin is used and a large number of gas vent holes are formed in a shielding film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60182734A JPS6240950A (en) | 1985-08-20 | 1985-08-20 | Molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60182734A JPS6240950A (en) | 1985-08-20 | 1985-08-20 | Molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6240950A JPS6240950A (en) | 1987-02-21 |
| JPH0570566B2 true JPH0570566B2 (en) | 1993-10-05 |
Family
ID=16123502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60182734A Granted JPS6240950A (en) | 1985-08-20 | 1985-08-20 | Molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6240950A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4575835B2 (en) * | 2005-05-13 | 2010-11-04 | 株式会社イノアックコーポレーション | Foam molding method |
| CN106670385A (en) * | 2016-12-29 | 2017-05-17 | 马正松 | V-method model casting process for casting household appliance base |
| CN106734901A (en) * | 2017-02-24 | 2017-05-31 | 滁州金诺实业有限公司 | Household electrical appliances base class product automation Molding Casting device |
-
1985
- 1985-08-20 JP JP60182734A patent/JPS6240950A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6240950A (en) | 1987-02-21 |
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