JPS63307929A - Molding method for plastics - Google Patents
Molding method for plasticsInfo
- Publication number
- JPS63307929A JPS63307929A JP14331887A JP14331887A JPS63307929A JP S63307929 A JPS63307929 A JP S63307929A JP 14331887 A JP14331887 A JP 14331887A JP 14331887 A JP14331887 A JP 14331887A JP S63307929 A JPS63307929 A JP S63307929A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- elastomer
- rubber
- sheet
- 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.)
- Pending
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229920003023 plastic Polymers 0.000 title claims abstract description 19
- 239000004033 plastic Substances 0.000 title claims description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 15
- 239000000806 elastomer Substances 0.000 claims abstract description 14
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 4
- 229920006311 Urethane elastomer Polymers 0.000 abstract description 4
- 229920003052 natural elastomer Polymers 0.000 abstract description 4
- 229920001194 natural rubber Polymers 0.000 abstract description 4
- 229920000181 Ethylene propylene rubber Polymers 0.000 abstract description 2
- 229920000800 acrylic rubber Polymers 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- -1 for example Polymers 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 229920000058 polyacrylate Polymers 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920001643 poly(ether ketone) Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、透明なプラスチックスの板あるいはシートの
成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of molding transparent plastic plates or sheets.
（従来の技術〕
従来、プラスチチックの成形方法として圧空成形方法、
真空成形方法は、射出成形方法、注型成形方法などに比
べ装置が簡単で、製造費が安価なことから食品等のパッ
ケージや、電気機器等のハウジング、自動車の内装品等
の成形方法として広く用いられてきた。圧空成形方法や
真空成形方法では、材料のプラスチチックスをゴム状に
軟化するまで加熱し、金型に強く押しつけ成形するが、
軟化したプラスチチックスが金型の表面に沿って移動す
るとき、金型表面の傷や、微細な荒れにより型傷を生じ
ていた。この型傷は、不透明な材料の成形や果物のパッ
ケージの成形等の型傷が実質的に問題にならないような
製品では何等問題とならないが、風防や、ＣＲＴフィル
ター、ドームなどの光学的な用途に用いられる製品の成
形には適さなかった。この型傷を防ぐ方法として、金型
表面を鏡面にする方法が考えられる。しかし、金型表面
を鏡面にすると、軟化したプラスチチックスと金型の間
の空気が抜は難く、かえって成形品の表面が荒れる現象
を生じる。型傷を生じない成形方法として、金型と軟化
したプラスチチックスが接触しないようにして成形する
方法するフリーブロー成形方法があるが成形できる形状
がドーム状のものに限られるという問題があった。(Conventional technology) Conventionally, the pressure molding method,
Vacuum forming is widely used as a molding method for packaging food products, housings for electrical equipment, interior parts of automobiles, etc. because the equipment is simpler and the manufacturing cost is lower than that of injection molding, cast molding, etc. has been used. In the pressure forming method and vacuum forming method, the plastic material is heated until it becomes rubber-like and then strongly pressed against a mold.
When the softened plastic moves along the surface of the mold, scratches and fine roughness on the surface of the mold occur, causing mold scratches. This mold damage does not pose any problem in products where mold damage is not a practical problem, such as molding of opaque materials or fruit packaging, but it is not a problem in products used in optical applications such as windshields, CRT filters, domes, etc. It was not suitable for molding products used in One way to prevent this mold damage is to make the surface of the mold a mirror surface. However, when the surface of the mold is mirror-finished, it is difficult to remove the air between the softened plastics and the mold, and the surface of the molded product becomes rough. As a molding method that does not cause mold damage, there is a free blow molding method in which the mold is molded without contact between the mold and the softened plastics, but there is a problem that the shape that can be molded is limited to a dome shape.
〔発明が解決しようとする問題点］
本発明の目的は、この様な成形により生じる成形品の傷
の発生を防止できる圧空成形方法を提供することにある
。[Problems to be Solved by the Invention] An object of the present invention is to provide a pressure molding method that can prevent scratches on molded products caused by such molding.
本発明者らは上記問題を解決すべく検討し、本発明に到
達した。The present inventors have studied to solve the above problems and have arrived at the present invention.
即ち、本発明は、透明なプラスチックスの板あるいはシ
ートを、表面にエラストマーの層を有する金型で、圧空
成形することを特徴とするプラスチックスの成形方法で
ある。That is, the present invention is a method for molding plastics, characterized in that a transparent plastic plate or sheet is pressure-formed in a mold having an elastomer layer on its surface.
本発明において利用できる金型は、表面が滑らかなもの
が好ましい、また、本発明の成形方法では、表面が滑ら
かであれば、金属性の金型の他にセラミックス、ガラス
、木材などでできた型でも特に問題な（使用できる。The mold that can be used in the present invention preferably has a smooth surface.In addition, in the molding method of the present invention, as long as the surface is smooth, in addition to metal molds, molds made of ceramics, glass, wood, etc. It is particularly problematic even in types (can be used.
金型の表面に設けるエラストマ一層の厚みとしては、０
．１〜５腫が好ましい、０．１−未満の厚みでは、連続
使用の際十分な耐久性を有しない、また、５閣を越える
厚みでは、エラストマ一層が波うち金型の形状が材料に
十分に転写できない。The thickness of one layer of elastomer provided on the surface of the mold is 0.
．． A thickness of 1 to 5 mm is preferable; a thickness of less than 0.1 mm will not provide sufficient durability during continuous use; a thickness of more than 5 mm will cause the elastomer layer to wave and the shape of the mold to be insufficient for the material. cannot be transferred to
本発明において利用できるエラストマーの種類としては
、例えば、エチレン−プロピレンゴム、エチレン−１−
ブテンゴム、ブチルゴム、ブタジェンゴム、スチレン−
ブタジェンゴム、エチレン−ブタジェンゴム、シリコン
ゴム、天然ゴム、ウレタンゴム、アクリルゴムなどが挙
げられる。Examples of the types of elastomers that can be used in the present invention include ethylene-propylene rubber, ethylene-1-
Butene rubber, butyl rubber, butadiene rubber, styrene
Examples include butadiene rubber, ethylene-butadiene rubber, silicone rubber, natural rubber, urethane rubber, and acrylic rubber.
エラストマーを金型表面に設ける方法として、例えば厚
みが０．１〜５■であるエラストマーのシートを金型の
表面に張り付ける方法、エラストマーのモノマー又は、
溶液を金型表面にコーティングする方法などが挙げられ
る。Examples of methods for providing the elastomer on the mold surface include pasting an elastomer sheet with a thickness of 0.1 to 5 cm on the mold surface, elastomer monomer, or
Examples include a method of coating a mold surface with a solution.
本発明による成形方法が利用できる透明なプラスチック
スとしては、例えば、ポリ塩化ビニル、高ニトリル樹脂
、ポリスチレン、ＡＢＳ樹脂、ＡＳ樹脂、ポリエーテル
ケトン、ポリエーテルケトンォン、ポリカーボネート、
ジエチレングリコールビスアリルカーボネート樹脂、ポ
リエチレンテレフタレート、ポリメチルメタアクリレー
ト等が挙げられる。また、二種類以上のプラスチチック
スの積層板やシートであってもよい。Transparent plastics that can be used in the molding method of the present invention include, for example, polyvinyl chloride, high nitrile resin, polystyrene, ABS resin, AS resin, polyetherketone, polyetherketone, polycarbonate,
Examples include diethylene glycol bisallyl carbonate resin, polyethylene terephthalate, and polymethyl methacrylate. It may also be a laminate or sheet of two or more types of plastics.
本発明の成形方法において、材料のプラスチチックスの
加熱は、ヒーター、材料のブラスチチックス、金型の順
に配置し行うことが好ましい、材料のプラスチチックス
と金型の間にヒーターを入れて加熱するとヒーターが移
動する際、金型、或いは軟化したブラスチチックスの表
面に埃などが落ち成形品に傷を生じる。In the molding method of the present invention, it is preferable to heat the plastic material by placing the heater, the plastic material, and the mold in this order. When the heater moves, dust falls onto the surface of the mold or the softened plastics, causing damage to the molded product.
本発明の成形温度、加熱時間、圧力は、成形するプラス
チチックスの従来の圧空成形温度、加熱時間、圧力をそ
のまま適用できる。The molding temperature, heating time, and pressure of the present invention can be the same as the conventional air pressure molding temperature, heating time, and pressure for plastics to be molded.
以下、実施例により本発明を説明する。 The present invention will be explained below with reference to Examples.
中心線平均粗さはＪＩＳ Ｂ−０６０１法（低域カット
オフ値０．８ｍｍ、測定長さ２霞−）により測定した。The center line average roughness was measured according to the JIS B-0601 method (low cutoff value 0.8 mm, measurement length 2 haze).
実施例１
自動車のフロントガラス用のアルミニウム製金型（８０
ｃｓＸ １８０ｃｍ、中心線平均粗さ ０．０２μｓ
）を製造し、金型の表面に厚みが１．０ｍ＋＊のウレタ
ンゴムのシート （中心線平均粗さ ０．１０μ■）を
張り、金型とした。厚さ３−のポリメチルメタアクリレ
ートシート（中心線平均粗さ ０．０２μｍ）を１６０
℃に加熱し、上記金型に５ ｋｇ／ｃｉｉの圧力で押し
、ポリメチルメタアクリレート製のフロントガラスを得
た。Example 1 Aluminum mold for automobile windshield (80
csX 180cm, center line average roughness 0.02μs
) was manufactured, and a urethane rubber sheet with a thickness of 1.0 m+* (center line average roughness 0.10 μ■) was placed on the surface of the mold to form a mold. A 3-thick polymethyl methacrylate sheet (center line average roughness 0.02 μm) was
℃ and pressed into the mold at a pressure of 5 kg/cii to obtain a windshield made of polymethyl methacrylate.
得られたフロントガラスは目視により金型と接する面の
傷の有無を観察したが実用上問題になる傷はなかった。The obtained windshield was visually inspected for scratches on the surface in contact with the mold, but there were no scratches that would pose a practical problem.
また、中心線平均粗さを測定したが０．０２ｐｍであっ
た。Moreover, the center line average roughness was measured and was 0.02 pm.
比較例１
実施例１の金型からウレタンゴムのシートを取去る他は
実施例１と同様にしてポリメチルメタアクリレート製の
フロントガラスを製造した。Comparative Example 1 A windshield made of polymethyl methacrylate was produced in the same manner as in Example 1 except that the urethane rubber sheet was removed from the mold of Example 1.
得られたフロントガラスはたくさんの型傷が見受けられ
た。実施例１と同様に中心線平均粗さを測定したところ
、０．０４μ閣であり、実施例１と比べ表面が荒れてい
た。The obtained windshield had many mold scratches. When the center line average roughness was measured in the same manner as in Example 1, it was found to be 0.04μ, and the surface was rougher than in Example 1.
実施例２
１４インチのテレビのブラウン菅より石膏製の型（中心
線平均粗さ０．０２１μ−）を製造し、これに厚さ０．
５■■の天然ゴム製シート（中心線平均粗さ０．１０μ
ｍｍ ）を張り金型の代りにした。厚さが１．０−の硬
質ポリ塩化ビニルのシート（中心線平均粗さ０．０２μ
ｍ）を１３０°Ｃに加熱し、上記の型に５ｋｇ／ ｃｊ
の圧力で押し、テレビ用フィルターを製造した。！１ｊ
フィルターをテレビに取付は使用したが問題なく良好で
あった。また、該フィルターの表面の中心線平均粗さは
０．０２２μ湯であった。Example 2 A plaster mold (center line average roughness: 0.021 μ-) was manufactured from a brown tube of a 14-inch television, and the mold had a thickness of 0.02 μm.
5■■ natural rubber sheet (center line average roughness 0.10μ
mm) was used instead of the tension mold. Rigid polyvinyl chloride sheet with a thickness of 1.0 - (center line average roughness 0.02μ)
m) to 130°C and 5kg/cj into the above mold.
A TV filter was manufactured by pressing with a pressure of ! 1j
I used the filter to attach it to the TV and it worked fine without any problems. Moreover, the center line average roughness of the surface of the filter was 0.022μ.
比較例２
実施例２の金型の代用物から天然ゴムのシートを取去る
他は実施例２と同様にしてテレビ用フィルターを製造し
た。該フィルターをテレビに取りつけ使用したが画面が
ゆがんで見える部分があった。また、該フィルターの中
心線平均粗さは０．０３μ腸であり、実施例２と比べ表
面が荒れていた。Comparative Example 2 A television filter was produced in the same manner as in Example 2, except that the natural rubber sheet was removed from the mold substitute in Example 2. I used this filter attached to a TV, but there were parts of the screen that looked distorted. Further, the center line average roughness of the filter was 0.03 μm, and the surface was rougher than in Example 2.
本発明の成形方法によれば、従来、難しかった自動車や
オートバイなどの風防、ドーム、ＣＲＴフィルターなど
の光学的用途に利用される透明で曲面を有するプラスチ
チックスの成形が容易に行える。また、本発明の成形方
法は、これらの光学的用途にに利用される製品の成形を
射出成形、注型成形などの方法により行う場合に比べ、
成形時間が短くてすみ、また、使用する金型も簡単な構
造であり、製品の製造費が軽減される。According to the molding method of the present invention, transparent and curved plastics used for optical applications such as windshields of automobiles and motorcycles, domes, and CRT filters can be easily molded, which has been difficult in the past. Furthermore, the molding method of the present invention is more effective than injection molding, cast molding, or other methods for molding products used for these optical applications.
The molding time is short, the mold used has a simple structure, and the manufacturing cost of the product is reduced.
Claims (1)
にエラストマーの層を有する金型で、圧空成形すること
を特徴とするプラスチックスの成形方法。1. A method for molding plastics, which comprises air-pressure molding a transparent plastic plate or sheet in a mold having an elastomer layer on its surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14331887A JPS63307929A (en) | 1987-06-10 | 1987-06-10 | Molding method for plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14331887A JPS63307929A (en) | 1987-06-10 | 1987-06-10 | Molding method for plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63307929A true JPS63307929A (en) | 1988-12-15 |
Family
ID=15335992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14331887A Pending JPS63307929A (en) | 1987-06-10 | 1987-06-10 | Molding method for plastics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63307929A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994010590A1 (en) * | 1992-11-02 | 1994-05-11 | The Dow Chemical Company | Polymeric reflective materials utilizing a back light source |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53105564A (en) * | 1977-02-25 | 1978-09-13 | Sumitomo Bakelite Co Ltd | Production of thin-wall plastic molded product and device therefor |
| JPS5443972A (en) * | 1977-09-13 | 1979-04-06 | Daiafoil | Method of making polyester moldings |
| JPS597822B2 (en) * | 1979-04-23 | 1984-02-21 | アイシン精機株式会社 | automatic embroidery sewing machine |
-
1987
- 1987-06-10 JP JP14331887A patent/JPS63307929A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53105564A (en) * | 1977-02-25 | 1978-09-13 | Sumitomo Bakelite Co Ltd | Production of thin-wall plastic molded product and device therefor |
| JPS5443972A (en) * | 1977-09-13 | 1979-04-06 | Daiafoil | Method of making polyester moldings |
| JPS597822B2 (en) * | 1979-04-23 | 1984-02-21 | アイシン精機株式会社 | automatic embroidery sewing machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994010590A1 (en) * | 1992-11-02 | 1994-05-11 | The Dow Chemical Company | Polymeric reflective materials utilizing a back light source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3211811A (en) | Method and apparatus for casting thermosetting plastic lenses | |
| US3550197A (en) | Molds for blowing engraved appearing bottles without the use of engraved molds | |
| ES8502638A1 (en) | Method and apparatus for manufacturing cast windows, and products obtained. | |
| US4545105A (en) | Method of making bright-faced reinforced plastic bumper | |
| CA2166120A1 (en) | Polystyrene foam sheet and process of making same | |
| ES532952A1 (en) | Process for thermoforming reinforced polymer sheets. | |
| SE7709776L (en) | FORMAD, FLEXIBLE DISC FOR VEHICLE CLOTHING | |
| CA2151362A1 (en) | Method and apparatus for applying a surfactant to mold surfaces | |
| CA2081575A1 (en) | Sheet for covering a substrate and a method for producing a molding using the same | |
| US3492392A (en) | Method of molding reinforced plastics | |
| CA2165757A1 (en) | A process and apparatus for expanding and molding fiberglass laminate and the panel formed thereby | |
| JPS63307929A (en) | Molding method for plastics | |
| GB1392560A (en) | Laminations | |
| JP3132925B2 (en) | Manufacturing method of injection molded products | |
| JPH02249616A (en) | Insert molding method for plate glass | |
| JP3048421B2 (en) | Manufacturing method of injection molded products | |
| CA2243114A1 (en) | Method of producing lens sheet and projection screen | |
| DE69013731T2 (en) | Biaxially stretched polyester film and process for its production. | |
| JPH0566247B2 (en) | ||
| JPH04265729A (en) | Thermoforming method of polycarbonate resin sheet | |
| JPS63188020A (en) | Manufacture of window | |
| JP2920933B2 (en) | Transfer sheet | |
| CN115657172A (en) | Fresnel lens structure, manufacturing method and application | |
| FR2235781A1 (en) | Vacuum forming optical quality sheet between rubber covers - to eliminate post polishing of mould marks or chill patterns | |
| JPH04327916A (en) | Manufacture of injection molded product |