JPH0212732B2 - - Google Patents
Info
- Publication number
- JPH0212732B2 JPH0212732B2 JP58108415A JP10841583A JPH0212732B2 JP H0212732 B2 JPH0212732 B2 JP H0212732B2 JP 58108415 A JP58108415 A JP 58108415A JP 10841583 A JP10841583 A JP 10841583A JP H0212732 B2 JPH0212732 B2 JP H0212732B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- molded product
- mold
- molded
- artificial stone
- 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
- 238000000465 moulding Methods 0.000 claims description 28
- 239000002969 artificial stone Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 7
- 239000006188 syrup Substances 0.000 claims description 7
- 235000020357 syrup Nutrition 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 239000011256 inorganic filler Substances 0.000 claims description 5
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 150000001451 organic peroxides Chemical class 0.000 claims description 3
- 229920006267 polyester film Polymers 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000001879 gelation Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Description
【発明の詳細な説明】
この発明は人造石成形品の注型成形法に関す
る。最近、建築や家具等に使用する素材として、
アクリル系樹脂シロツプに微粉状の無機質充填材
を加え、これ等を有機過酸化物の存在下で注型成
形した各種形状の人造石成形品が多用されるよう
になつた。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cast molding method for artificial stone molded articles. Recently, as a material used for architecture and furniture,
Artificial stone molded products of various shapes, which are made by adding finely powdered inorganic fillers to acrylic resin syrup and casting them in the presence of organic peroxides, have come into widespread use.
この種の人造石成形品は、表面が大理石状を呈
するほか、耐摩耗性、耐候性、耐薬品性等がよ
く、しかも、比較的成形が容易に行え、加工が簡
単で汚れや傷がつきにくい利点がある。 This type of artificial stone molded product has a marble-like surface and has good abrasion resistance, weather resistance, chemical resistance, etc. Moreover, it is relatively easy to mold, easy to process, and does not get dirty or scratched. It has some advantages.
ところが、人造石成形品を注型法で成形する
際、無機質充填材のバインダーとして使用するア
クリル系樹脂シロツプがゲル化後重合硬化時点で
８〜12％の収縮現象を生じる。 However, when molding an artificial stone product by the casting method, the acrylic resin syrup used as a binder for the inorganic filler shrinks by 8 to 12% at the time of polymerization and hardening after gelation.
前述の収縮現象は成形品全体に一様に生じず、
部分的に不規則な状態で発生する。 The aforementioned shrinkage phenomenon does not occur uniformly throughout the molded product;
Occurs in a partially irregular manner.
前述の収縮現象に起因する凹凸が成形品の表
面、特に使用上の可視面に現われると成形品の価
値が著しく低下するのみならず、使用が拒否され
る原因にもなる。 If irregularities caused by the above-mentioned shrinkage phenomenon appear on the surface of the molded article, especially on the visible surface during use, not only will the value of the molded article be significantly reduced, but it will also cause the molded article to be rejected for use.
この発明は、アクリル系樹脂シロツプをバイン
ダーとして用いても、成形品の表面に、収縮現象
に起因する凹凸が生じないような人造石成形品の
注型成形法を提供するものである。 The present invention provides a cast molding method for an artificial stone molded article in which unevenness due to shrinkage phenomenon does not occur on the surface of the molded article even when acrylic resin syrup is used as a binder.
以下実施例を図面につき詳述すると、第１図は
この発明の成形法で製作された人造石成形品１を
例示し、この人造石成形品１は第２図に示すよう
な上型３と下型４からなり、両型間に成形部５を
有する注型２によつて成形製作される。 Embodiments will be described in detail below with reference to the drawings. FIG. 1 illustrates an artificial stone molded product 1 manufactured by the molding method of the present invention, and this artificial stone molded product 1 has an upper mold 3 as shown in FIG. It is formed by a casting mold 2 consisting of a lower mold 4 and having a molding part 5 between both molds.
前記注型の上型３には成形品の裏面側Ｂを形成
する成形壁部６が、又、下型４には成形品の表面
側Ａを形成する成形壁部７がそれぞれ設けられ、
両成形壁部６，７間は成形品全体を形成する成形
部５となつている。 The upper mold 3 of the casting mold is provided with a molding wall portion 6 that forms the back side B of the molded product, and the lower mold 4 is provided with a molding wall portion 7 that forms the front side A of the molded product,
The space between the two molded walls 6 and 7 is a molded part 5 that forms the entire molded product.
前述の注型２を用いて人造石成形品を成形する
際、上型３の成形壁部６全面に離型性の良好な薄
いポリエステルフイルム８を張着する。 When molding an artificial stone molded product using the casting mold 2 described above, a thin polyester film 8 with good mold releasability is attached to the entire surface of the molding wall 6 of the upper mold 3.
次に、下型４の成形凹部５ａに成形原料を注入
する。 Next, a molding raw material is injected into the molding recess 5a of the lower mold 4.
前記成形原料は、微粉状の珪酸カルシウム、炭
酸カウシウム、水酸化アルミ等の一種、或はこれ
等の二種、時には二種以上混合した無機質充填材
にバインダーとしてアクリル系樹脂シロツプを添
加し、これ等にベンゾイルパーオキサイド、ラウ
ロイルバーオキサイド、アゾビスイソブチロニト
リル等の有機過酸化物を加えて十分混練した混合
液である。 The above-mentioned molding raw material is made by adding acrylic resin syrup as a binder to an inorganic filler such as one or two of these, sometimes a mixture of two or more of them, such as finely powdered calcium silicate, cowsium carbonate, and aluminum hydroxide. This is a mixed solution obtained by adding organic peroxides such as benzoyl peroxide, lauroyl peroxide, azobisisobutyronitrile, etc. and thoroughly kneading the mixture.
前述の成形原料を下型４の成形凹部５ａ内に注
入した後、図示の如く上型３をセツトし、この状
態で加圧加熱してゲル化重合硬化させる。 After the above-mentioned molding raw material is injected into the molding recess 5a of the lower mold 4, the upper mold 3 is set as shown in the figure, and in this state it is heated under pressure to gel and polymerize and harden.
この様にすると、前記成形原料中にアクリル系
樹脂シロツプがバインダーとして添加させてある
関係上必然的に収縮現象を発生するが、前述の如
く、人造石成形品の裏面側Ｂを形成する成形壁部
６上に離型性のよいポリエステルフイルム８を張
着したから、成形原料のゲル化後重合硬化時点で
生ずる収縮はポリエステルフイルム８が存在する
成形壁部６、即ち、成形品の裏面側Ｂに集中して
発生する。 If this is done, a shrinkage phenomenon will inevitably occur due to the fact that acrylic resin syrup is added as a binder to the molding raw material, but as mentioned above, the molded wall forming the back side B of the artificial stone molded product Since the polyester film 8 with good mold releasability is pasted on the part 6, the shrinkage that occurs at the time of polymerization and hardening after gelation of the molding raw material is caused by the shrinkage occurring at the molding wall part 6 where the polyester film 8 is present, that is, the back side B of the molded product. occurs concentratedly in
その理由は、ポリエステルフイルム８を張着し
た成形壁部６側が他方の成形壁面７側に比べて成
形品の離型性が大となり、該部に収縮作用が集中
するからである。 The reason for this is that the releasability of the molded product is greater on the side of the molded wall 6 to which the polyester film 8 is attached than on the other side of the molded wall 7, and the shrinkage action is concentrated on this side.
この発明の注型方法によると、無機質充填材等
のバインダーとして用いるアクリル系樹脂シロツ
プのゲル化後重合硬化時の収縮に起因する凹凸の
発生は、成形品の使用時における非可視面（裏面
Ｂ）に発生し、可視面（表面Ａ）には全く生じな
いから、従来のような不良品の発生がなく、成形
歩留りが著しく向上する。 According to the casting method of the present invention, the occurrence of unevenness caused by shrinkage during polymerization and curing after gelation of the acrylic resin syrup used as a binder for inorganic fillers, etc., can be avoided on the invisible surface (back side ) and not at all on the visible surface (surface A), so there is no generation of defective products as in the conventional case, and the molding yield is significantly improved.
なお、上記実施例においては、離型性の良好な
フイルム８としてポリエステルフイルムを例示し
たが、ポリエステルフイルム以外に、ポバールや
サランのフイルムを用いても同じ効果を生ずるも
のである。 In the above embodiment, a polyester film was used as the film 8 having good mold releasability, but the same effect can be obtained by using a poval or saran film in addition to the polyester film.
第１図は人造石成形品の一例を示す正面図、第
２図は成形金型の縦断面図である。
１……成形品、２……注型、３……上型、４…
…下型、５……成形部、５ａ……成形凹部、６，
７……成形壁部、８……フイルム、Ａ……成形品
の可視面（表面）、Ｂ……成形品の非可視面（裏
面）。
FIG. 1 is a front view showing an example of an artificial stone molded product, and FIG. 2 is a longitudinal sectional view of a molding die. 1... Molded product, 2... Cast mold, 3... Upper mold, 4...
...Lower mold, 5...Molding part, 5a...Molding recess, 6,
7... Molded wall portion, 8... Film, A... Visible surface (front surface) of the molded product, B... Invisible surface (back surface) of the molded product.
Claims (1)
混合物を用い、有機過酸化物の存在下で成形する
人造石成形品の注型成形法において、成形品の裏
面側Ｂを形成する成形壁部６を有する上型３と、
成形品の表面側Ａを形成する成形壁部７を有する
下型４とからなる注型２を使用し、前記上型の成
形壁部６に離型性の良好なフイルム８を張着して
下型４の成形壁部７より離型性を大とすると共
に、下型４の成形凹部５ａに成形原料を注入後上
型３をセツトし、加圧加熱してゲル化後重合硬化
させ、収縮を成形品の裏面に集中して発生するよ
うにしたことを特徴とする人造石成形品の注型成
形法。1 In a cast molding method for an artificial stone molded product in which a mixture of an inorganic filler and an acrylic resin syrup is molded in the presence of an organic peroxide, the molded wall portion 6 forming the back side B of the molded product is an upper mold 3 having;
A casting mold 2 consisting of a lower mold 4 having a molding wall 7 forming the surface side A of the molded product is used, and a film 8 with good mold releasability is attached to the molding wall 6 of the upper mold. The molding wall portion 7 of the lower mold 4 has greater mold releasability, and after injecting the molding raw material into the molding concave portion 5a of the lower mold 4, the upper mold 3 is set, and is heated under pressure to gel and then polymerize and harden. A cast molding method for an artificial stone molded product, characterized in that shrinkage is concentrated on the back side of the molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10841583A JPS59232813A (en) | 1983-06-15 | 1983-06-15 | Cast molding method of synthetic stone molded piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10841583A JPS59232813A (en) | 1983-06-15 | 1983-06-15 | Cast molding method of synthetic stone molded piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59232813A JPS59232813A (en) | 1984-12-27 |
| JPH0212732B2 true JPH0212732B2 (en) | 1990-03-26 |
Family
ID=14484176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10841583A Granted JPS59232813A (en) | 1983-06-15 | 1983-06-15 | Cast molding method of synthetic stone molded piece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59232813A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61230913A (en) * | 1985-04-08 | 1986-10-15 | Mitsuboshi Belting Ltd | Manufacture of polyamide mold |
| US8858850B2 (en) * | 2009-07-02 | 2014-10-14 | E I Du Pont De Nemours And Company | Process for preparing decorative surface appearance in acrylic material employing anisotropic particles |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022586A (en) * | 1973-06-27 | 1975-03-11 | ||
| JPS53115768A (en) * | 1977-03-22 | 1978-10-09 | Mitsubishi Rayon Co Ltd | Preparation of marblelike cured material |
| JPS5571526A (en) * | 1978-11-24 | 1980-05-29 | Asahi Fiber Glass Co Ltd | Method of making reinforced resin product having minute unevenness on surface |
-
1983
- 1983-06-15 JP JP10841583A patent/JPS59232813A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022586A (en) * | 1973-06-27 | 1975-03-11 | ||
| JPS53115768A (en) * | 1977-03-22 | 1978-10-09 | Mitsubishi Rayon Co Ltd | Preparation of marblelike cured material |
| JPS5571526A (en) * | 1978-11-24 | 1980-05-29 | Asahi Fiber Glass Co Ltd | Method of making reinforced resin product having minute unevenness on surface |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59232813A (en) | 1984-12-27 |
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