JPH0233294B2 - ORIMAGEBUHOKYOYORIBUKOZO - Google Patents
ORIMAGEBUHOKYOYORIBUKOZOInfo
- Publication number
- JPH0233294B2 JPH0233294B2 JP13837383A JP13837383A JPH0233294B2 JP H0233294 B2 JPH0233294 B2 JP H0233294B2 JP 13837383 A JP13837383 A JP 13837383A JP 13837383 A JP13837383 A JP 13837383A JP H0233294 B2 JPH0233294 B2 JP H0233294B2
- Authority
- JP
- Japan
- Prior art keywords
- bent portion
- bent
- reinforcing
- open end
- slide core
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はプラスチツク製品における折曲部補強
用リブ構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rib structure for reinforcing bent portions of plastic products.
（従来技術）
プラスチツク製品の折曲部、特にPPバンパー
の上面部等には変形対策、剛性対策としてリブを
付け補強することが必要となる。折曲部の形状
は、第１図に示すように、折曲部の主板材１から
必要角度で曲げられた曲板２の内側に内部張り出
し板３が設けられている場合を例にすると、図中
上下方向からの荷重に耐えるため曲板２と内部張
り出し板３に垂直で各板の内面に密着したリブ４
を補強用に設ける。この場合では、リブ４の設け
られた面と反対側に位置する表面に“ヒケ”が発
生するため、板材の厚みを増加させたり、金属等
の別部品を用いて補強している。この対策方法で
はコストアツプを来たすばかりでなく製品設計上
の大きな問題である。(Prior art) It is necessary to reinforce bent parts of plastic products, especially the upper surface of PP bumpers, with ribs to prevent deformation and stiffness. As shown in FIG. 1, the shape of the bent portion is, for example, when an internal projecting plate 3 is provided inside a curved plate 2 bent at a necessary angle from the main plate 1 of the bent portion. In the figure, ribs 4 are perpendicular to the curved plate 2 and the internal projecting plate 3 and are tightly attached to the inner surface of each plate in order to withstand loads from the top and bottom directions.
is provided for reinforcement. In this case, "sink marks" occur on the surface opposite to the surface on which the ribs 4 are provided, so the thickness of the plate material is increased or it is reinforced using a separate part such as metal. This countermeasure method not only increases costs but also poses a major problem in product design.
（発明の目的）
本発明は上記問題点を解消するためになされた
もので、製品の外観を損なうことがなく、かつ、
変形を防止し、製品剛性を向上させることができ
る折曲物補強用リブ構造を提供するものである。(Object of the Invention) The present invention has been made to solve the above problems, and does not impair the appearance of the product, and
The present invention provides a rib structure for reinforcing bent objects that can prevent deformation and improve product rigidity.
（発明の構成）
本発明の特徴は折り曲げ側に内部張り出し板を
有する折曲部の補強用板材を、前記折曲部の折曲
面に対して垂直な面に形成し、前記補強用板材の
一開放端を前記折曲部の折り曲げ側端部に合わ
せ、他開放端を前記折曲部の角部から離した位置
に設けたことである。(Structure of the Invention) A feature of the present invention is that a reinforcing plate material for a bent portion having an internal protruding plate on the bent side is formed in a plane perpendicular to the bending surface of the bent portion, and one of the reinforcing plate materials The open end is aligned with the bent side end of the bent portion, and the other open end is provided at a position away from the corner of the bent portion.
（作用）
本発明は上記構成により、補強用板材を折曲部
の内面より離して設けたことにより、補強用板材
と折曲部の内面との間に不要な肉盛を必要とせ
ず、一定肉厚の製品を製作できるようになる。(Function) With the above configuration, the present invention provides the reinforcing plate material at a distance from the inner surface of the bent portion, thereby eliminating the need for unnecessary build-up between the reinforcing plate material and the inner surface of the bent portion, and maintaining a constant build-up. It becomes possible to manufacture thick products.
（実施例） 以下、本発明の一実施例を図により説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第２図に示すように、第１図で示した部品と同
じ部品に対する補強用のリブ５を、曲板２と内部
張り出し板３との間に折曲面に対して垂直となる
ように設け、リブ５の外側開放端部（折り曲げ側
開放端部）５ａを曲板２の端部２ａと内部張り出
し板３の端部３ａに合わせ、リブ５の内側開放端
部５ｂは外側開放端部５ａの端縁と平行な端縁を
持ち、かつ、折曲部内面６または角部２ｂから離
れた位置にその端縁を設置して形成する。 As shown in FIG. 2, reinforcing ribs 5 for the same parts as shown in FIG. The outer open end 5a of the rib 5 (bending side open end) is aligned with the end 2a of the curved plate 2 and the end 3a of the internal projecting plate 3, and the inner open end 5b of the rib 5 is aligned with the outer open end 5a. It is formed by having an edge parallel to the edge, and setting the edge at a position away from the inner surface 6 of the bent part or the corner 2b.
このような形状のリブ５を形成させる製造手順
は第３図イ，ロに示すように、可動型７にはリブ
５の横断面に対して両開放端部５ａ，５ｂを結ぶ
面の１つの面を可動型７との境界としてリブ５を
形成させる空間を有するスライドコア８を嵌合
し、そのスライドコア８の後にエジエクタピン９
を可動型７とスライドコア８との境界からスライ
ドコア側に厚み方向へ傾斜させて取り付ける。可
動型７とスライドコア８で形成された空間に図の
ごとくリブ５が射出成形され、硬化された後、第
４図イ，ロに示すように、可動型（図示せず）が
後退し、エジエクタピン９が前進してスライドコ
ア８と一緒に製品を押し出す。エジエクタピン９
は可動型７とスライドコア８との境界からスライ
ドコア側へ傾斜しているため、図中左側へスライ
ドコア８を移動させて、リブ５からスライドコア
８を引き離す方向に動作させ、型抜きを行なわせ
る。 The manufacturing procedure for forming the rib 5 having such a shape is as shown in FIGS. 3A and 3B. A slide core 8 having a space where a rib 5 is formed with its surface as a boundary with the movable mold 7 is fitted, and an ejector pin 9 is fitted behind the slide core 8.
is attached to the slide core side from the boundary between the movable mold 7 and the slide core 8 so as to be inclined in the thickness direction. After the ribs 5 are injection molded into the space formed by the movable mold 7 and the slide core 8 as shown in the figure and cured, the movable mold (not shown) is retracted as shown in FIG. The ejector pin 9 moves forward and pushes out the product together with the slide core 8. ejecta pin 9
is inclined from the boundary between the movable mold 7 and the slide core 8 toward the slide core side, so move the slide core 8 to the left side in the figure and move it in the direction of separating the slide core 8 from the rib 5 to remove the mold. let it happen.
このようにして上記実施例では、製品の折曲部
に肉厚の不均一な部分のないリブ構造を実現さ
せ、成形変形を防止し、外観品質を向上させる。
外観品質が向上したことにより不良品が減少し、
生産性が向上し、コストダウンができるようにな
る。また設計上成形変形を考慮した補強対策を講
じる必要がなくなる。 In this way, in the above-mentioned embodiment, a rib structure without uneven thickness is achieved at the folded portion of the product, thereby preventing molding deformation and improving the appearance quality.
Improved appearance quality reduces defective products,
Productivity will improve and costs will be reduced. Further, there is no need to take reinforcement measures in consideration of molding deformation in the design.
（発明の効果）
以上のように本発明による折曲部補強用リブ構
造は、製品成形時の外観不良を防止し、製品剛性
を高める折曲部の補強用リブ構造を与える。リブ
を折曲部の内面より離して設けたことにより一定
肉厚の製品を製作できるようになる。外観不良を
なくしたことにより製品の留止まりが良くなり生
産性が向上する。(Effects of the Invention) As described above, the rib structure for reinforcing a bent portion according to the present invention prevents appearance defects during product molding and provides a rib structure for reinforcing a bent portion that increases product rigidity. By providing the ribs at a distance from the inner surface of the bent portion, it is possible to manufacture products with a constant wall thickness. Eliminating appearance defects improves product retention and improves productivity.
第１図は従来の折曲部補強用リブ構造を示す縦
断面図、第２図は本発明による折曲部補強用リブ
構造を示す縦断面図、第３図イは射出成形された
リブ構造と金型との関係を前後方向を上下にして
示す平面縦断面図、第３図ロは第３図イの−
線に沿う側面縦断面図、第４図イは金型から抜き
出す工程を前後方向を上下にして説明するための
平面縦断面図、第４図ロは第４図イの−線に
沿う側面縦断面図である。
１……主板材、２……曲板、２ａ……曲板の端
部（折り曲げ側端部）、２ｂ……角部、３……内
部張り出し板、５……リブ（補強用板材）、５ａ
……外側開放端部（折り曲げ側開放端部）、５ｂ
……内側開放端部、６……折曲部内面。
Fig. 1 is a longitudinal sectional view showing a conventional rib structure for reinforcing a bent part, Fig. 2 is a longitudinal sectional view showing a rib structure for reinforcing a bent part according to the present invention, and Fig. 3 A is an injection molded rib structure. A plane vertical sectional view showing the relationship between the mold and the mold with the front and back direction up and down, Figure 3B is the - of Figure 3A.
Figure 4(a) is a side longitudinal sectional view taken along the line, Figure 4(a) is a plane longitudinal sectional view for explaining the process of extracting from the mold with the front and rear directions up and down, and Figure 4(b) is a side longitudinal sectional view taken along the - line of Figure 4(a). It is a front view. 1... Main plate material, 2... Curved plate, 2a... End of curved plate (bent side end), 2b... Corner, 3... Internal overhanging plate, 5... Rib (reinforcing plate material), 5a
...Outside open end (bending side open end), 5b
...Inner open end, 6...Inner surface of bent portion.
Claims (1)
の補強用板材を、前記折曲部の折曲面に対して垂
直な面に形成し、前記補強用板材の一開放端を前
記折曲部の折り曲げ側端部に合わせ、他開放端を
前記折曲部の角部から離した位置に設けたことを
特徴とする折曲部補強用リブ構造。1. A reinforcing plate material for a bent portion having an internal protruding plate on the bent side is formed in a plane perpendicular to the folding surface of the bent portion, and one open end of the reinforcing plate material is bent at the bent portion. A rib structure for reinforcing a bent portion, characterized in that the other open end is provided at a position apart from a corner of the bent portion in alignment with the side end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13837383A JPH0233294B2 (en) | 1983-07-28 | 1983-07-28 | ORIMAGEBUHOKYOYORIBUKOZO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13837383A JPH0233294B2 (en) | 1983-07-28 | 1983-07-28 | ORIMAGEBUHOKYOYORIBUKOZO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6030318A JPS6030318A (en) | 1985-02-15 |
| JPH0233294B2 true JPH0233294B2 (en) | 1990-07-26 |
Family
ID=15220412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13837383A Expired - Lifetime JPH0233294B2 (en) | 1983-07-28 | 1983-07-28 | ORIMAGEBUHOKYOYORIBUKOZO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233294B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2757597B2 (en) * | 1991-07-19 | 1998-05-25 | 日産自動車株式会社 | Mold for resin bumper |
| FR3016824B1 (en) * | 2014-01-29 | 2016-08-26 | Snecma | MOLD, IN PARTICULAR INJECTION MOLD, AND INJECTION MOLDING METHOD USING SUCH A MOLD |
-
1983
- 1983-07-28 JP JP13837383A patent/JPH0233294B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6030318A (en) | 1985-02-15 |
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