JPH0441643B2 - - Google Patents
Info
- Publication number
- JPH0441643B2 JPH0441643B2 JP23670183A JP23670183A JPH0441643B2 JP H0441643 B2 JPH0441643 B2 JP H0441643B2 JP 23670183 A JP23670183 A JP 23670183A JP 23670183 A JP23670183 A JP 23670183A JP H0441643 B2 JPH0441643 B2 JP H0441643B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molded product
- lower molds
- press molding
- resin
- 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
Links
- 238000000465 moulding Methods 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 description 10
- 239000012768 molten material Substances 0.000 description 8
- 239000000155 melt Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 229920001169 thermoplastic Polymers 0.000 description 5
- 239000004416 thermosoftening plastic Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は熱可塑性合成樹脂より被成形品を成形
するのに使用される樹脂プレス成形装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a resin press molding apparatus used for molding a molded article from a thermoplastic synthetic resin.
従来例の構成とその問題点
従来例の構成を第１図から第６図に従つて説明
する。１は樹脂のプレス成形装置で成形された、
例えば冷蔵庫に使用する蒸発皿等の被成形品であ
る。Configuration of the conventional example and its problems The configuration of the conventional example will be explained with reference to FIGS. 1 to 6. 1 was molded using a resin press molding device,
For example, it is a molded product such as an evaporating dish used in a refrigerator.
この被成形品１は上面を開口した容器状に形成
され、その外周端１′は下方へ折れ曲つて形成さ
れている。 This molded product 1 is formed into a container shape with an open top, and its outer peripheral end 1' is bent downward.
２はこの被成形品１を形成する雄の上金型３と
雌の下金型４とからなるプレス成形装置である。
前記下金型４はほぼ中央部にポリプロピレン等の
熱可塑性合成樹脂の溶融物５を供給するノズル６
と垂直面７をもつ外周部８とを有している。ま
た、上金型３は下金型４に沿つた押圧部９と下金
型４の外周部８よりも約0.1mm大きく、垂直面７
に対面する金型封止面１０とを有している。この
外周部８と金型封止面１０とで前記被成形品１の
外周端１′を形成している。また上下金型３，４
は油圧プレスのプレート１１，１１′に固定され
ている。この様な従来の構成における樹脂のプレ
ス成形の加工工程を、第４図から第６図に従つて
説明する。すなわち、開放状態にある上下金型
３，４間に一定量の溶融物５を下金型４のほぼ中
央部にあるノズル６より供給し、その後、油圧プ
レスを稼動させプレート１１，１１′に固定され
た上下金型３，４を閉じて溶融物５を圧縮してい
く（第３図の状態）。そして上下金型３，４が接
触した（第４図の状態）後も、下金型４の外周部
８に位置する垂直面７が、上金型４の金型封止面
１０よりも約0.1mm小さいので、垂直面７と金型
封止面１０とは嵌合しながらさらに溶融物５を圧
縮し、上下金型３，４の空間内に溶融物５を押し
拡げることになる。そして、この上下金型３，４
が接近した状態で冷却後、上下金型３，４を離し
て離型することにより被成形品１が得られる。こ
の際、下金型４と外周部８と垂直面７と上金型３
の金型封止面１０とのクリヤランスは約0.1mm以
下であれば溶融物５の壁面抵抗が大きくなりバリ
の発生は防止できる。 Reference numeral 2 denotes a press molding device comprising a male upper mold 3 and a female lower mold 4 for forming the molded product 1.
The lower mold 4 has a nozzle 6 that supplies a melt 5 of a thermoplastic synthetic resin such as polypropylene approximately in the center.
and an outer peripheral portion 8 having a vertical surface 7. In addition, the upper mold 3 is approximately 0.1 mm larger than the pressing part 9 along the lower mold 4 and the outer peripheral part 8 of the lower mold 4, and the vertical surface 7
It has a mold sealing surface 10 facing the mold. This outer peripheral portion 8 and the mold sealing surface 10 form an outer peripheral end 1' of the molded product 1. Also, upper and lower molds 3 and 4
are fixed to the plates 11, 11' of the hydraulic press. The process of press molding resin in such a conventional configuration will be explained with reference to FIGS. 4 to 6. That is, a certain amount of molten material 5 is supplied between the upper and lower molds 3 and 4 which are in an open state from a nozzle 6 located approximately in the center of the lower mold 4, and then the hydraulic press is operated and the melt is applied to the plates 11 and 11'. The fixed upper and lower molds 3 and 4 are closed to compress the molten material 5 (the state shown in FIG. 3). Even after the upper and lower molds 3 and 4 come into contact (the state shown in FIG. 4), the vertical surface 7 located on the outer peripheral part 8 of the lower mold 4 is approximately lower than the mold sealing surface 10 of the upper mold 4. Since it is 0.1 mm smaller, the vertical surface 7 and the mold sealing surface 10 further compress the molten material 5 while fitting together, and force the molten material 5 to spread within the space between the upper and lower molds 3 and 4. And these upper and lower molds 3 and 4
After cooling while the molds are close to each other, the upper and lower molds 3 and 4 are separated and released to obtain the molded product 1. At this time, the lower mold 4, the outer peripheral part 8, the vertical surface 7, and the upper mold 3
If the clearance with the mold sealing surface 10 is about 0.1 mm or less, the wall resistance of the molten material 5 will be large and the generation of burrs can be prevented.
しかし、このような構成による樹脂のプレス成
形であれば、垂直面７と金型封止面１０のクリヤ
ランスをできるだけ小さくすることによりバリの
発生は防止できても被成形品１の端面１２に生じ
る鋭いエツジを無くすことができなかつた。この
様な被成形品１の端面に生じる鋭いエツジは、被
成形品１の取扱い上において、人体の肌を傷付け
る恐れがあり、危険であつた。 However, in the case of press molding of resin with such a configuration, even if the occurrence of burrs can be prevented by reducing the clearance between the vertical surface 7 and the mold sealing surface 10 as much as possible, burrs will be generated on the end surface 12 of the molded product 1. I couldn't get rid of the sharp edges. Such sharp edges formed on the end surface of the molded product 1 are dangerous when handling the molded product 1 because they may injure human skin.
発明の目的
本発明は、冷蔵庫に使用される蒸発皿等の被成
形品を樹脂プレス成形装置で形成する際、被成形
品の端面に位置する部分になめらかな凹溝を外周
に設け、端面部のエツジを無くし、目的の被成形
品を得ることのできる樹脂プレス成形装置を提供
することを目的とする。Purpose of the Invention The present invention provides a method for forming a molded product such as an evaporating dish used in a refrigerator using a resin press molding device, by providing a smooth concave groove on the outer periphery of the part located at the end surface of the molded product. An object of the present invention is to provide a resin press molding apparatus that can eliminate the edges and obtain the desired molded product.
発明の構成
この目的を達成するために、本発明は上下金型
を閉じてポリプロピレン等の熱可塑性合成樹脂の
溶融物を上下金型空間内に押し拡げて加工する
際、一方の金型の被成形品の端面に位置する金型
封止面に外周部側になめらかな凹溝を形成したも
のである。すなわち、上下金型が閉じた時、押し
拡げられた前記溶融物が被成形品の端面部に位置
する部分でなめらかな凹溝に沿つて流れるため、
鋭いエツジを防止することになる。Composition of the Invention In order to achieve this object, the present invention provides a method for processing when the upper and lower molds are closed and a molten material of thermoplastic synthetic resin such as polypropylene is forced into the upper and lower mold spaces. A smooth groove is formed on the outer peripheral side of the mold sealing surface located at the end surface of the molded product. That is, when the upper and lower molds are closed, the expanded molten material flows along the smooth concave groove at the end surface of the molded product.
This will prevent sharp edges.
実施例の説明
以下本発明の一実施例について第７図から第１
１図を参考に説明するが、従来と同一構造につい
ては同一番号を付けて説明を省略する。DESCRIPTION OF THE EMBODIMENTS The following describes an embodiment of the present invention from FIG. 7 to 1.
The description will be made with reference to FIG. 1, and structures that are the same as those of the prior art will be given the same numbers and the description will be omitted.
１４は雄状の上金型１５の金型封止面１６に形
成された凹溝で、この位置は被成形品１７の端面
１８に位置する部分である。そして、外周側へな
めらかな凹部となる様形成された溝である。 Reference numeral 14 denotes a groove formed in the mold sealing surface 16 of the male-shaped upper mold 15, and this position is a portion located on the end surface 18 of the molded product 17. The groove is formed to form a smooth concave portion toward the outer circumference.
次にかかる樹脂のプレス成形装置で、冷蔵庫に
使用される蒸発皿等の被成形品１７を成形する加
工工程について説明する。この被成形品１７は上
面を開口した容器となつており、その外周端１
７′を下方へ折曲した形状にしている。 Next, a processing process for molding a molded article 17, such as an evaporating dish used in a refrigerator, using the resin press molding apparatus will be described. This molded product 17 is a container with an open top surface, and its outer peripheral end 1
7' is bent downward.
開放状態にある上下金型１５，４間にポリプロ
ピレン等の熱可塑性合成樹脂の溶融物５を供給
し、その後、上下金型１５，４を閉じて溶融物５
を圧縮していく（第８図の状態）。そして溶融物
５が完全に上下金型１５，４間に充填されると型
締めは完了する。この際、供給された溶融物５の
体積により、被成形品１７の肉厚が制御でき、型
締め完了時には上金型１５の金型封止面１６に形
成したなめらかな凹部をもつ溝１４の下部が、下
金型４の外周部の端面８とが同位置になる様して
おく（第９図の状態）。そして冷却後、上下金型
１５，４を開き、金型より被成形品１７をとり出
す。 A melt 5 of thermoplastic synthetic resin such as polypropylene is supplied between the upper and lower molds 15 and 4 which are in an open state, and then the upper and lower molds 15 and 4 are closed to supply the melt 5.
(state shown in Figure 8). When the molten material 5 is completely filled between the upper and lower molds 15 and 4, mold clamping is completed. At this time, the thickness of the molded product 17 can be controlled by the volume of the supplied melt 5, and when the mold clamping is completed, the groove 14 with a smooth recess formed in the mold sealing surface 16 of the upper mold 15 is The lower part is placed in the same position as the end surface 8 of the outer peripheral part of the lower mold 4 (the state shown in FIG. 9). After cooling, the upper and lower molds 15 and 4 are opened and the molded product 17 is taken out from the molds.
この装置により得られた被成形品１７の端面１
８は上金型１５のなめらかな凹溝１４に沿つて形
成されるため、なめらかなアールをもつものとな
る。したがつて従来例の様に、被成形品の端面に
鋭いエツジが生じることなく、取扱い上安全な製
品を得ることができるものである。 End face 1 of molded product 17 obtained by this device
8 is formed along the smooth groove 14 of the upper mold 15, so it has a smooth radius. Therefore, unlike the conventional example, there are no sharp edges on the end face of the molded product, and a product that is safe to handle can be obtained.
発明の効果
以上の説明からも明らかな様に、本発明は、開
放状態にある上下金型間に、ポリプロピレン等の
熱可塑性合成樹脂の溶融物を供給し、その後、上
下金型を閉じて前記溶融樹脂を上下金型空間内に
押し拡げて成形する際に前記上下金型の嵌合部の
被成形品の端面に位置する金型封止面に外周側へ
なめらかな凹溝を形成するもので二次加工による
端面の処理を必要とせずして、被成形品の端面に
鋭いエツジを生じさせないものであり、取扱い上
安全な被成形品を作る樹脂プレス成形装置であ
る。Effects of the Invention As is clear from the above description, the present invention supplies a melt of a thermoplastic synthetic resin such as polypropylene between the upper and lower molds that are in an open state, and then closes the upper and lower molds to Forming a smooth concave groove toward the outer periphery of the mold sealing surface located at the end surface of the molded product at the fitting portion of the upper and lower molds when molding the molten resin by forcing it into the upper and lower mold spaces. This is a resin press molding device that does not require end face treatment through secondary processing, does not produce sharp edges on the end face of the molded product, and produces molded products that are safe to handle.
第１図は従来の樹脂プレス成形装置により成形
された被成形品の一部欠切した斜視図、第２図は
同第１図のＡ部拡大断面図、第３図は従来の樹脂
プレス成形装置の要部断面図、第４図から第６図
は同第３図の工程を示す断面図、第７図は本発明
の一実施例における樹脂プレス成形装置の要部断
面図、第８図，第９図は同第７図の工程を示す断
面図、第１０図は本発明により成形された被成形
品の一部欠切した斜視図、第１１図は同第１０図
のＢ部断面拡大図である。
１……被成形品、１２……エツジ、１４……
溝、１５……上金型、１８……端面。
Figure 1 is a partially cutaway perspective view of a molded product molded by a conventional resin press molding device, Figure 2 is an enlarged sectional view of section A in Figure 1, and Figure 3 is a conventional resin press molding. 4 to 6 are sectional views showing the steps shown in FIG. 3; FIG. 7 is a sectional view of the main parts of a resin press molding apparatus according to an embodiment of the present invention; FIG. 8 , FIG. 9 is a cross-sectional view showing the process shown in FIG. 7, FIG. 10 is a partially cutaway perspective view of a molded product molded according to the present invention, and FIG. 11 is a cross-sectional view of section B in FIG. 10. It is an enlarged view. 1... Product to be molded, 12... Edge, 14...
Groove, 15... Upper mold, 18... End surface.
Claims (1)
形状に成形する上金型と下金型とを有し、この上
下金型の一方における金型封止面に底が外方へな
めらかな凹溝を形成した樹脂プレス成形装置。1. It has an upper mold and a lower mold that close together the molten resin supplied between them and form it into a predetermined shape, and the mold sealing surface of one of the upper and lower molds has a concave surface with a smooth outward facing bottom. A resin press molding device that forms grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23670183A JPS60127123A (en) | 1983-12-15 | 1983-12-15 | Resin press molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23670183A JPS60127123A (en) | 1983-12-15 | 1983-12-15 | Resin press molding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60127123A JPS60127123A (en) | 1985-07-06 |
| JPH0441643B2 true JPH0441643B2 (en) | 1992-07-09 |
Family
ID=17004481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23670183A Granted JPS60127123A (en) | 1983-12-15 | 1983-12-15 | Resin press molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60127123A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63286329A (en) * | 1987-05-18 | 1988-11-24 | 下村 清雄 | Molding equipment for vessel made of paper |
-
1983
- 1983-12-15 JP JP23670183A patent/JPS60127123A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60127123A (en) | 1985-07-06 |
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