JPH04191023A - Cover-shaped molding - Google Patents
Cover-shaped moldingInfo
- Publication number
- JPH04191023A JPH04191023A JP32663990A JP32663990A JPH04191023A JP H04191023 A JPH04191023 A JP H04191023A JP 32663990 A JP32663990 A JP 32663990A JP 32663990 A JP32663990 A JP 32663990A JP H04191023 A JPH04191023 A JP H04191023A
- Authority
- JP
- Japan
- Prior art keywords
- main body
- end edge
- section
- cover
- communicating
- 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- RLLPVAHGXHCWKJ-IEBWSBKVSA-N (3-phenoxyphenyl)methyl (1s,3s)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-1-carboxylate Chemical compound CC1(C)[C@H](C=C(Cl)Cl)[C@@H]1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 RLLPVAHGXHCWKJ-IEBWSBKVSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はプラスチック製の家電製品、家庭用品等におけ
る蓋形成形品の表面に樹脂冷却時の肉厚部に生じる歪み
、いわゆるピケを防止し、表面を円滑面に仕上げ、かつ
所要強度を有して裏面形状に凹凸がなくすっきり仕上げ
るようになす蓋形成形品に間するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention prevents so-called picketing, which is the distortion that occurs in the thick wall portions of the lid-forming parts of plastic home appliances, household goods, etc. when resin is cooled. This is a lid-forming product that has a smooth surface, has the required strength, and has a smooth back surface with no unevenness.
家電製品、家庭用品等においては一穀に合成樹脂で形成
した蓋が取り付けられる場合が多い。In the case of home appliances, household goods, etc., a lid made of synthetic resin is often attached to each grain.
合成樹脂成形品はデザインの自由度が増し、かつ着色が
容易にできる利点があり、各分野において汎用されてい
る。Synthetic resin molded products have the advantage of increased freedom in design and can be easily colored, and are widely used in various fields.
一方、合成樹脂は上述の如き利点を有するが、木製、金
属製に比べ、強度的に劣るとともに変形を起こしやすい
。これを補うため蓋状成形品は外部から見えないその裏
面において補強用のリブを端縁近くに設けたり、あるい
は端縁を折り曲げている。On the other hand, although synthetic resin has the above-mentioned advantages, it is inferior in strength and easily deforms compared to wood and metal. In order to compensate for this, the lid-shaped molded product is provided with reinforcing ribs near the edge on the back surface that cannot be seen from the outside, or the edge is bent.
〔発明が解決しようとするｉＭ）
したがって蓋形成形品でも裏面側ではりブ等が突出して
いて凹凸のある複雑な形状となり、汚れやすく、かつ清
掃が困難である。特にコーナ部では払拭が困難で汚れが
残り、不快感を与え、さらにこのリプ付部の表面側には
ピケが生じ、外観の円滑さを損なうものとなっている。[IM to be Solved by the Invention] Therefore, even the lid-forming product has protruding ribs and the like on the back side, resulting in a complicated shape with unevenness, which is easily soiled and difficult to clean. Particularly in the corners, it is difficult to wipe away and stains remain, giving a feeling of discomfort.Furthermore, pickets occur on the surface side of the lipped parts, impairing the smooth appearance.
本発明は蓋状成形品においてその裏面における補強用の
リブを省き、かつ所要強度を保持し、表面にはピケ等が
生じないようになすことを目的とする。The object of the present invention is to omit reinforcing ribs on the back surface of a lid-shaped molded product, maintain the required strength, and prevent pickets and the like from occurring on the surface.
本発明は上記目的を達成するためになしたもので、蓋形
成形品の端縁肉厚を補強リブを省いても充分の強度を有
するように本体部肉厚より厚くし、かつ本体部と端縁部
との遠投部内に成形時におけるピケを生じないよう加圧
するための加圧空洞部を形成するとともに端縁部と本体
部との連設部内面において滑らかなカーブを描いて屈曲
連設されるようにしたことを要旨とする。The present invention was made to achieve the above object, and the edge thickness of the lid-forming molded product is made thicker than the main body part so that it has sufficient strength even without the reinforcing ribs, and A pressurized cavity is formed in the far throw part between the end edge and the main body to prevent pickling during molding, and a smooth curve is drawn on the inner surface of the connection between the end edge and the main body to form a bending connection. The main point is that it has been established.
形成品の端縁部を肉厚としても成形時、この肉厚部内に
ガスにて加圧しているため、成形品表面にピケが発生す
ることなく、表面を美しく仕上げることができ、 しか
も補強用リブをなくし、裏面をしっくりさせ、内側の外
観を美しく什りげられる。また充分の補強を得られる。Even if the edge of the molded product is thick, gas is pressurized into this thick part during molding, so the surface of the molded product can be finished beautifully without pickling. Eliminate ribs and make the back side look more beautiful, creating a beautiful interior appearance. It also provides sufficient reinforcement.
〔実施例〕
以下本発明蓋形成形品を図示の実施例にもとづいて説明
する。[Example] The lid-forming molded article of the present invention will be described below based on the illustrated example.
図においてＡは家電製品、例えば電気洗′＃ＩＩｌの蓋
を示し、これは家電製品等に応した形状、ライズを有す
るように成形される。このＭＡは一般にポリスチレン樹
脂をもって成形金型にて所要形状に成形するが、この樹
脂の種別は限定されることはなく、用途等に応して任怠
に選定される。In the figure, A indicates the lid of a household appliance, for example, an electric washing machine, and this is molded to have a shape and a rise corresponding to the household appliance. This MA is generally made of polystyrene resin and molded into a desired shape using a mold, but the type of resin is not limited and may be selected depending on the application and the like.
このＩＩＡの成形はシリンダー温度２４０℃、射出圧力
９０ｋｇ／−で金型のキャビティ内に注入し、６秒後、
金型に樹脂注入ゲートと別に設置されているガスゲート
より圧力４１ ｋｇ／ｃｆｆｌの圧縮窒素ガス等の不活
性ガスを注入し、その後、金型を冷却した接、およそ６
０〜１００秒佳に金型より完成品を取り出す。This IIA is injected into the mold cavity at a cylinder temperature of 240℃ and an injection pressure of 90kg/-, and after 6 seconds,
Inert gas such as compressed nitrogen gas at a pressure of 41 kg/cffl was injected into the mold through a gas gate installed separately from the resin injection gate, and then the mold was cooled down to about 6 ml.
Take out the finished product from the mold for 0 to 100 seconds.
なお、本発明蓋形成形品の成形法の一例を上述したが、
他の方法にて成形することも可能であ る。In addition, although an example of the molding method for the lid-forming article of the present invention has been described above,
It is also possible to mold by other methods.
１ｉＡは所要形状をした本体部１の端縁を一側方へ折り
曲げ、端縁部２とし、この本体片１と端縁部２の連設部
はデザインにより直角、または傾斜面を介して種々に連
接されるとともに本体部１の肉厚は所要強度を有するよ
うにして定められるが、端ｉ部２はこの本体部の強度を
増すためにも、より厚いものとし、この端縁部２が従来
の補強リブを兼用させる。そしてこの本体部ｌ、端縁部
２の連設部は他のいかなる部分よりも肉厚となるので、
この内部には成形時、不活性ガスを注入して空洞３を形
成せしめる。1iA is made by bending the end edge of the main body part 1 having the required shape to one side to form the end edge part 2, and the connecting part between the main body piece 1 and the end edge part 2 can be formed at a right angle or through an inclined surface depending on the design. The wall thickness of the main body part 1 is determined so as to have the required strength, but the end i part 2 is made thicker in order to increase the strength of the main body part. The conventional reinforcing ribs can also be used. And since the continuous part of the main body part l and the end edge part 2 is thicker than any other part,
During molding, an inert gas is injected into this interior to form a cavity 3.
これにより成形品表面にピケの生しるのを未然に防止で
きるものとなる。This makes it possible to prevent pickets from forming on the surface of the molded product.
さらにｌｉへの裏側では端縁部２と本体部１との連設部
分は緩やかな傾斜面４を介して屈曲連接するかまたは円
弧形の弧面を描くようにする。Further, on the back side of the li, the connecting portion of the edge portion 2 and the main body portion 1 is bent and connected via a gentle slope 4, or forms an arcuate surface.
これにより蓋裏面側には補強用１／プ等の突起物をなく
し、内側をすっきりさせる。This eliminates protrusions such as reinforcing 1/p on the back side of the lid, leaving the inside clean.
また第２図に示す実施例は本体部ｌの端部に傾斜面を有
する成形品で、外形状が第１天施例とは異なるが、成形
法及び効果は同じである。The embodiment shown in FIG. 2 is a molded product having an inclined surface at the end of the main body l, and the outer shape is different from the first embodiment, but the molding method and effects are the same.
なお成形品は蓋に限定されることはなく各種のものにも
応用できる。Note that the molded product is not limited to lids, and can be applied to various other items.
本発明による時は成形品の裏面において補強用のリブを
なくし、外周部の肉厚を増すことにより補強効果を増す
とともにコーナ部を０面またはＲ面とすることにより成
形品端部の補強と変形防止を図ることができ、かつ裏面
形状をすっきりさせ、汚れなどの清掃も簡易に行え、全
体的に高級感を与えることができる。しかも肉厚部とな
る部分には成形時、ガス圧を加えているので、 ピケが
生しることもなく表面を美しく仕Ｆげられる利点を有す
る。According to the present invention, there is no reinforcing rib on the back surface of the molded product, and the reinforcement effect is increased by increasing the thickness of the outer periphery, and by making the corner part a zero surface or R surface, the end portion of the molded product is reinforced. It is possible to prevent deformation, the shape of the back surface is clean, dirt, etc. can be easily cleaned, and the overall appearance can be given to luxury. Moreover, since gas pressure is applied to the thick parts during molding, there is no picket formation and the surface can be finished beautifully.
図面は本発明蓋形成形品の一実施例を示し、第１図は第
１実施例の断面図、第２図は第２実施例の断面図、第３
図、第４図は公知例の断面図である。
Ａは蓋、 １は本体部、２は端縁部、３は空洞部。The drawings show one embodiment of the lid-forming molded product of the present invention, and FIG. 1 is a cross-sectional view of the first embodiment, FIG. 2 is a cross-sectional view of the second embodiment, and FIG.
FIG. 4 is a sectional view of a known example. A is the lid, 1 is the main body, 2 is the edge, and 3 is the cavity.
Claims (1)
の強度を有するように本体部肉厚より厚くし、かつ本体
部と端縁部との連設部内に成形時におけるピケを生じな
いよう加圧するための加圧空洞部を形成するとともに端
縁部と本体部との連設部内面において滑らかなカーブを
描いて屈曲連設されるようにしたことを特徴とする蓋形
完成品。(1) The thickness of the edge of the lid forming product is made thicker than the thickness of the main body so that it has sufficient strength even without the reinforcing ribs, and the A lid characterized in that it forms a pressurizing cavity for pressurizing so as not to cause picketing, and is bent and connected in a smooth curve on the inner surface of the connecting part between the end edge and the main body. Completed product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32663990A JP2919603B2 (en) | 1990-11-27 | 1990-11-27 | Molding method for lid-formed products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32663990A JP2919603B2 (en) | 1990-11-27 | 1990-11-27 | Molding method for lid-formed products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04191023A true JPH04191023A (en) | 1992-07-09 |
| JP2919603B2 JP2919603B2 (en) | 1999-07-12 |
Family
ID=18190034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32663990A Expired - Fee Related JP2919603B2 (en) | 1990-11-27 | 1990-11-27 | Molding method for lid-formed products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2919603B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0531922U (en) * | 1991-10-09 | 1993-04-27 | マツダ株式会社 | Injection-molded product protrusion structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289721B (en) * | 2017-07-26 | 2019-09-17 | 合肥美的电冰箱有限公司 | Refrigerator thin-walled door end cap and refrigerator |
-
1990
- 1990-11-27 JP JP32663990A patent/JP2919603B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0531922U (en) * | 1991-10-09 | 1993-04-27 | マツダ株式会社 | Injection-molded product protrusion structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2919603B2 (en) | 1999-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |