JP2004142403A - Pressure forming die - Google Patents
Pressure forming die Download PDFInfo
- Publication number
- JP2004142403A JP2004142403A JP2002349095A JP2002349095A JP2004142403A JP 2004142403 A JP2004142403 A JP 2004142403A JP 2002349095 A JP2002349095 A JP 2002349095A JP 2002349095 A JP2002349095 A JP 2002349095A JP 2004142403 A JP2004142403 A JP 2004142403A
- Authority
- JP
- Japan
- Prior art keywords
- opening
- forming die
- opening periphery
- pressure forming
- deformation
- 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 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は，天井直付照明器具の角形カバーの成形に好適な圧空成形用金型に関する。
【０００２】
【従来の技術】
圧空成形で成形するカバーの開口部形状は、開口部の強度を保つため、開口部周縁をコの字状に形成している。
また．圧空成形の場合、板状のプラスチック材を伸ばして成形するため、材料の伸びが均一になることが望ましく、開口部も外形に合わせ、丸形カバーならば丸形の開口部、角形カバーならば角形の開口部にしている。
【０００３】
【発明が解決しようとする課題】
上記従来技術は、離型後の材料収縮について配慮されておらず、丸形カバーであれば、開口部周縁が同一形状のために材料収縮が均等に行われ反り等の変形は起こらないが、角形カバーの場合は、開口部の辺中央と辺端部では、収縮に差が出てしまい反り等の変形が起きてしまう。
このため、カバー周緑に取り付ける飾り枠等と組み合わせる際に隙間が生じたり、変形したカバーを無理矢理矯正しながら組み合わせなければならなかつた。また、変形を防ぐためには材料の冷却時間を長くする等の特殊な作業をする必要があった。本発明はこの難点を解決するものである。
【０００４】
【課題を解決するための手段】
上記課題を解決するため、開口部が変形することを考慮し、変形によって両端部と辺中央が直線に呈する程度に外側に膨らむ辺とする。このことから、成形直後は略八角形を成しているが、材料が冷却し、変形すると各辺が直線となり，四角形状となる。
【０００５】
【発明の実施の形態】
本発明の実施形態について説明する。図１におけるカバー１は、圧空成形で成形された外形が四角形の壷状をなし、開口部２は、変形に強度を保つために、断面がコの字状を成し、また、材料の伸びを均一にするため外形に合わせた辺 ３になっている。
ここで、図２−Ａ・Ｂの従来技術を説明する。図２−Ａに示す開口部４は、成形直後は材料が金型の辺に沿うため、辺５が直線の四角形になっている。しかし、離型後の材料収縮により矢印Ａの方向に辺中央６が変形してしまい、最終的には図２−Ｂに示すような辺５が変形し、つぼまった開口部４になってしまう。
図３−Ａ・Ｂの本発明構造について説明する。図３−Ａに示す開口部７は、成形直後は、辺中央８が変形によって直線に呈する程度に外側に膨らむ、くの字状の辺８を成し、略八角形を呈している。材料が収縮すると矢印Ｂの方向に辺中央８が変形するため、最終的には図３−Ｂに示すような辺８が直線の四角形の開口部７となる。
【０００６】
【発明の効果】
本発明によれば、開口部を四角形にすることができるため、飾り枠等との嵌合部材を簡単にでき、また、反りを防ぐために冷却時間を長くする等の特殊な作業も必要にならないため、コスト削減も図れる。
【図面の簡単な説明】
【図１】本発明の圧空成形による角形カバーの斜視図である。
【図２】従来技術の開口部の上面図で、Ａ・Ｂは成形過程を示す。
【図３】本発明に場合の図２同様の説明図である。
【図４】本発明に係る角形カバーを装着した天井直付形照明器具の斜視図である。
【符号の説明】
１：カバー、２：開口部、３：辺[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a compressed air molding die suitable for forming a rectangular cover of a lighting fixture directly mounted on a ceiling.
[0002]
[Prior art]
Regarding the shape of the opening of the cover formed by air pressure molding, the periphery of the opening is formed in a U-shape in order to maintain the strength of the opening.
Also. In the case of air pressure molding, since the plate-shaped plastic material is stretched and molded, it is desirable that the elongation of the material is uniform, the opening is also adjusted to the outer shape, and if it is a round cover, it is a round opening, if it is a square cover, It has a square opening.
[0003]
[Problems to be solved by the invention]
The above prior art does not consider the material shrinkage after release, and if the cover is a round cover, material shrinkage is performed evenly due to the same shape of the periphery of the opening, and deformation such as warpage does not occur. In the case of a rectangular cover, there is a difference in shrinkage between the side center and the side end of the opening, and deformation such as warpage occurs.
For this reason, when combining with a decorative frame or the like to be attached to the peripheral green of the cover, a gap may be generated, or the deformed cover must be combined while forcibly correcting it. Further, in order to prevent the deformation, it is necessary to perform a special operation such as extending the cooling time of the material. The present invention solves this difficulty.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in consideration of the deformation of the opening, the side is expanded outward so that both ends and the center of the side are linearly formed by the deformation. For this reason, immediately after forming, the material has a substantially octagonal shape. However, when the material is cooled and deformed, each side becomes a straight line and becomes a square shape.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described. The cover 1 shown in FIG. 1 has a rectangular urn shape in outer shape formed by air pressure molding, and the
Here, the prior art of FIGS. 2A and 2B will be described. In the opening 4 shown in FIG. 2A, the material is along the side of the mold immediately after molding, and therefore the side 5 is a straight rectangle. However, the center 6 of the side is deformed in the direction of arrow A due to the material shrinkage after the release, and the side 5 is finally deformed as shown in FIG. I will.
The structure of the present invention shown in FIGS. Immediately after molding, the opening 7 shown in FIG. 3A has a
[0006]
【The invention's effect】
According to the present invention, since the opening can be made square, the fitting member with the decorative frame or the like can be simplified, and no special operation such as prolonging the cooling time to prevent warpage is required. Therefore, cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a rectangular cover formed by pressure molding according to the present invention.
FIG. 2 is a top view of a conventional opening, and AB shows a forming process.
FIG. 3 is an explanatory view similar to FIG. 2 in the case of the present invention.
FIG. 4 is a perspective view of a ceiling-mounted lighting fixture equipped with a rectangular cover according to the present invention.
[Explanation of symbols]
1: cover, 2: opening, 3: side
Claims (1)
該金型における前記関口周緑と対応する開口周緑部をそれらの各辺が外向きに膨らむように形成し、その膨らみの程度を成形後の材料冷却にともなう変形によって前記開口周線の各辺が直線状を呈するように定めたことを特徴とする圧空成形用金型。In a pressure molding die for obtaining a square-port urn-shaped pressure-formed product having a pot-like shape in which the green around the opening is narrowed and the periphery of the Sekiguchi having a rectangular shape,
An opening peripheral green portion corresponding to the Sekiguchi peripheral green in the mold is formed so that each side thereof expands outward, and the degree of the expansion is determined by deformation accompanying material cooling after molding. A compressed air molding die characterized in that sides are determined to be linear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002349095A JP2004142403A (en) | 2002-10-25 | 2002-10-25 | Pressure forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002349095A JP2004142403A (en) | 2002-10-25 | 2002-10-25 | Pressure forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2004142403A true JP2004142403A (en) | 2004-05-20 |
Family
ID=32462971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002349095A Pending JP2004142403A (en) | 2002-10-25 | 2002-10-25 | Pressure forming die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2004142403A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160021806A (en) | 2013-06-20 | 2016-02-26 | 미츠비시 가스 가가쿠 가부시키가이샤 | Film, film molding method, mold, molding comprising film, and molding method therefor |
-
2002
- 2002-10-25 JP JP2002349095A patent/JP2004142403A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160021806A (en) | 2013-06-20 | 2016-02-26 | 미츠비시 가스 가가쿠 가부시키가이샤 | Film, film molding method, mold, molding comprising film, and molding method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1484356A4 (en) | Polylactic acid molding and process for producing the same | |
| EA200970383A1 (en) | CASTING SHAPE | |
| USD466473S1 (en) | Tire | |
| JP2004142403A (en) | Pressure forming die | |
| JP2003111189A5 (en) | ||
| BR0209991B1 (en) | mold and process for manufacturing a lost foam casting model for a lightweight cylindrical metal liner. | |
| KR101402303B1 (en) | connecting hook and method of producing the same | |
| JPS6129524A (en) | Monolithic molding method of blow molding with bracket | |
| JP2002046119A (en) | Form | |
| JP2001300950A (en) | Vacuum casting silicon mold | |
| JPS62255120A (en) | Hollow molded form and molding thereof | |
| JP2003299745A (en) | Fire-preventive division penetrating member and injection molding method thereof | |
| JP2003191217A (en) | Form for producing concrete segment | |
| JP5372415B2 (en) | Hollow molded product with seat member and method for manufacturing the same | |
| JPH06238629A (en) | Manufacture of concrete panel for decorative metal sheet | |
| JPH065131Y2 (en) | Mold for resin molding | |
| JP3068075U (en) | Mounting part structure between cabinets | |
| JPS63115648A (en) | Production of core for casting mold | |
| JP2001317200A (en) | Synthetic resin form for constructing circular arc- shaped structure | |
| JP2000005829A (en) | Die device | |
| JP2004181635A (en) | Mold equipment for injection blow molding | |
| JP2014014969A (en) | Pipe insert and insert blow molding method | |
| JP2003340914A (en) | Glove and molding method therefor | |
| JPH07114343A (en) | Utility pole display board, its manufacturing method and mold | |
| TH48306A (en) | Processes and equipment for the manufacture of thermally molded open-end polyamide packaging materials and reflective device bases. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050930 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070626 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20070703 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A02 | Decision of refusal |
Effective date: 20071031 Free format text: JAPANESE INTERMEDIATE CODE: A02 |