JP4458576B2 - Synthetic resin sheet molding equipment - Google Patents

Synthetic resin sheet molding equipment Download PDF

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Publication number
JP4458576B2
JP4458576B2 JP19637299A JP19637299A JP4458576B2 JP 4458576 B2 JP4458576 B2 JP 4458576B2 JP 19637299 A JP19637299 A JP 19637299A JP 19637299 A JP19637299 A JP 19637299A JP 4458576 B2 JP4458576 B2 JP 4458576B2
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Japan
Prior art keywords
mold
core
synthetic resin
resin sheet
mold body
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Expired - Fee Related
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JP19637299A
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Japanese (ja)
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JP2001018288A (en
Inventor
▲高▼広 長谷川
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Meiwa Industry Co Ltd
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Meiwa Industry Co Ltd
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Priority to JP19637299A priority Critical patent/JP4458576B2/en
Publication of JP2001018288A publication Critical patent/JP2001018288A/en
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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、合成樹脂シートの成形装置に関するものである。
【０００２】
【従来の技術】
従来より、合成樹脂シートを一対の成形型の間に配置し、そして各成形型の互いに対向する内面で合成樹脂シートを挟んで成形するようにした成形装置が知られている。また、一方の成形型には他方の成形型に対して外接する切断部が形成され、型締めと同時に切断部により合成樹脂シートの不要部分を切除するトリミング処理が行えるようになっている。
【０００３】
また、この種の一対の成形型は、一方の成形型の内面の温度を、他方の成形型の内面と異ならせる場合がある。すなわち、合成樹脂シートによっては、断熱性を有する表皮材が片面に積層される場合があるため、このような表皮材が接する方の内面の温度を、反対側の内面よりも低く設定する場合がある。前記のトリミング用の切断部は、このような温度差による熱膨張率の違いを考慮して予め位置が精密に調整されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、このような従来の技術にあっては、各成形型が予め予定された温度差に調整されると、一方の成形型に形成された切断部が他方の成形型に正確に外接して、切断部のエッジと相手方のエッジとで、合成樹脂シートの不要部分を正確に切除できるものの、各成形型間の温度差を変更すると、熱膨張により切断部の位置に狂いが生じ、型締め時に相手方の成形型に強干渉して破損を招いたり、或いは、逆に相手方の成形型との間に隙間が生じて、切断不良になるおそれがある。従って、従来は成形型の温度差の変更が不可能で、決まった温度差でしか用いることができず、成形型の汎用性が低いという課題がある。
【０００５】
この発明は、このような従来の技術に着目してなされたものであり、成形型の温度差の変更が可能で、汎用性の高い合成樹脂シートの成形装置を提供するものである。
【０００６】
【課題を解決するための手段】
請求項１記載の発明は、一対の成形型の互いに対向する内面で合成樹脂シートを挟んで成形すると共に、一方の成形型に、他方の成形型に外接して合成樹脂シートの不要部分をトリミング処理する切断部が形成された合成樹脂シートの成形装置であって、前記一方の成形型が、内面を形成する中子と、該中子を包むように支持する型本体とから形成されており、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれに、ヒーター線と冷却管双方を有し、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれを、異なる任意の温度に設定できることを特徴とする。
【０００７】
請求項１記載の発明によれば、合成樹脂シートに接触する内面が中子に形成され、また切断部は別の型本体に形成されているため、中子の温度を変更しても、切断部の位置には影響がない。従って、成形型の温度差の変更が可能で、成形型の汎用性を高めることができる。また、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれに、ヒーター線と冷却管双方を有し、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれを、異なる任意の温度に設定できることにより、様々な合成樹脂シートの成形に対応できることになる。
【０００８】
請求項２記載の発明は、中子と型本体との間には、断熱材が介在されていることを特徴とする。
【０００９】
請求項２記載の発明によれば、中子と型本体との間に断熱材が介在されているため、型本体が中子の温度影響を受けにくくなる。
【００１０】
請求項３記載の発明は、中子と型本体との間には、隙間が形成されていることを特徴とする。
【００１１】
請求項３記載の発明によれば、中子と型本体との間に隙間が形成されているため、この点においても、型本体が中子の温度影響を受けにくくなる。
【００１２】
【発明の実施の形態】
以下、この発明の好適な実施形態を図１及び図２基づいて説明する。この実施形態の合成樹脂シート１は、熱可塑性樹脂製シートの下面に、熱伝導率の低い不織布製の表皮材が積層された構造になっている。
【００１３】
一方、成形装置は、「成形型」としての下型２と上型３とから形成されている。下型２及び上型３には互いに対向する内面４、５が形成されており、この内面４、５で加熱された合成樹脂シート１を挟むことにより、合成樹脂シート１の内面４、５に応じた形状を賦与することができる。
【００１４】
また、上型３の周囲には、下型２の側面に対して外接する切断部６が下向きに形成されている。すなわち、下型２と上型３との型締め時に、切断部６のエッジ６ｅと、下型２の対応するエッジ２ｅとで、合成樹脂シート１を挟んで切断し、不要部分を取り除けるようになっている（トリミング処理）。
【００１５】
そして、下型２は、一体物で形成されているが、上型３は、中子７と型本体８とに分かれている。前記中子７は、内面５を形成するもので、型本体８に比べて重量が小さい。型本体８は、中子７を包むように支持しており、中子７に比べて重量が大きい。また、この型本体８の方に、前記切断部６が形成されている。更に、中子７の上面と型本体８の下面との間には、断熱材９が介在されており、中子７の側面と型本体８との間には、隙間１０も設けられている。
【００１６】
このような構造の下型２と、中子７及び型本体８よりなる上型３には、ぞれぞれ複数の冷却管Ｐと、図示せぬヒータ線が設けられており、それぞれを任意の温度に調整することができる。
【００１７】
この実施形態では、成形しようとする合成樹脂シート１の上面に、図示せぬ表皮材が貼着されているため、合成樹脂シート１の上面に接する内面５の方を、下面に接する内面４よりも温度を低くする必要がある。具体的には、下側の内面４の温度は、４５°Ｃで、上側の内面５の温度は、１５°Ｃに設定されている。尚、型本体８は、下型２と同じ温度（４５°）に調整されている。
【００１８】
この実施形態によれば、下側の内面４の方が上側の内面５よりも温度が高く設定されているため、合成樹脂シート１の上面に断熱性の高い表皮材を積層した構造でも、合成樹脂シート１を確実に内面４、５に応じた形状に成形することができる。また、中子７の温度を下型２と相違させても、切断部６を有する型本体８は、下型２と同じ温度のため（中子７とは無関係のため）、切断部６のエッジ６ｅと下型２のエッジ２ｅとの位置関係に変化はなく、確実な合成樹脂シート１のトリミング処理が行える。
【００１９】
また、この切断部６による切断性能は、成形する合成樹脂シート１が変って、中子７の温度を変えても、変化はない。中子７の温度を変えることにより、中子７自体は、多少熱膨張したり、熱収縮したりするが、その周りが大きな型本体８で取り囲まれているため、型本体８により押さえ込まれ、切断部６の位置に変化を与えるものではない。従って、下型２及び上型３の温度差の変更が自由に行え、成形型の汎用性を高めることができる。
【００２０】
更に、この実施形態によれば、中子７と型本体８との間に、断熱材９や隙間１０を介在させているため、型本体８が中子７の温度影響を特に受けにくくなり、切断部６の位置に全く影響を与えない。
【００２１】
【発明の効果】
請求項１記載の発明によれば、合成樹脂シートに接触する内面が中子に形成され、また切断部は別の型本体に形成されているため、中子の温度を変更しても、切断部の位置には影響がない。従って、成形型の温度差の変更が可能で、成形型の汎用性を高めることができる。また、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれに、ヒーター線と冷却管双方を有し、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれを、異なる任意の温度に設定できることにより、様々な合成樹脂シートの成形に対応できることになる。
【００２２】
請求項２記載の発明によれば、中子と型本体との間に断熱材が介在されているため、型本体が中子の温度影響を受けにくくなる。
【００２３】
請求項３記載の発明によれば、中子と型本体との間に隙間が形成されているため、この点においても、型本体が中子の温度影響を受けにくくなる。
【図面の簡単な説明】
【図１】 本願発明の一実施例に係る型締め前の成形型を示す断面図。
【図２】 図１の成形型の型締め後を示す断面図。
【符号の説明】
１ 合成樹脂シート
２ 下型（成形型）
３ 上型（成形型）
４、５ 内面
６ 切断部
７ 中子
８ 型本体
９ 断熱材
１０ 隙間
Ｐ 冷却管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin sheet molding apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a molding apparatus in which a synthetic resin sheet is disposed between a pair of molding dies, and the synthetic resin sheets are sandwiched between inner surfaces facing each other. In addition, a cutting portion circumscribing the other mold is formed in one mold, and a trimming process for cutting off unnecessary portions of the synthetic resin sheet by the cutting section can be performed simultaneously with clamping.
[0003]
Moreover, this type of pair of molds may make the temperature of the inner surface of one mold different from the inner surface of the other mold. That is, depending on the synthetic resin sheet, there may be a case where a heat-insulating skin material is laminated on one side, so the temperature of the inner surface on which such a skin material contacts may be set lower than the inner surface on the opposite side. is there. The position of the trimming cutting portion is precisely adjusted in advance in consideration of the difference in thermal expansion coefficient due to such a temperature difference.
[0004]
[Problems to be solved by the invention]
However, in such a conventional technique, when each mold is adjusted to a predetermined temperature difference, the cut portion formed in one mold is accurately circumscribed on the other mold. Although the unnecessary part of the synthetic resin sheet can be accurately cut off at the edge of the cutting part and the other party's edge, changing the temperature difference between the molds will cause a deviation in the position of the cutting part due to thermal expansion, and clamping At times, there is a risk of causing a breakage due to strong interference with the other mold or conversely forming a gap with the other mold. Therefore, conventionally, it is impossible to change the temperature difference of the mold, it can be used only at a fixed temperature difference, and there is a problem that versatility of the mold is low.
[0005]
The present invention has been made by paying attention to such a conventional technique, and provides a highly versatile synthetic resin sheet molding apparatus that can change the temperature difference of a molding die.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, the synthetic resin sheet is sandwiched between the inner surfaces facing each other of the pair of molding dies, and an unnecessary portion of the synthetic resin sheet is trimmed by circumscribing the other molding die to one molding die. A molding apparatus for a synthetic resin sheet in which a cutting portion to be processed is formed, wherein the one mold is formed of a core that forms an inner surface and a mold body that supports the core so as to wrap the core . Each of the core and mold body of the one mold and the other mold has both a heater wire and a cooling pipe, and each of the core of the one mold and the mold body and the other mold, It can be set to any different temperature .
[0007]
According to the first aspect of the present invention, since the inner surface that contacts the synthetic resin sheet is formed in the core, and the cutting portion is formed in another mold body, the cutting can be performed even if the temperature of the core is changed. The position of the part is not affected. Therefore, the temperature difference of the mold can be changed, and the versatility of the mold can be enhanced. Further, each of the core and mold body of the one mold and the other mold has both a heater wire and a cooling pipe, and each of the core, mold body and the other mold of the one mold Can be set to different arbitrary temperatures, so that various synthetic resin sheets can be molded.
[0008]
The invention described in claim 2 is characterized in that a heat insulating material is interposed between the core and the mold body .
[0009]
According to the second aspect of the invention, since the heat insulating material is interposed between the core and the mold body, the mold body is not easily affected by the temperature of the core.
[0010]
The invention described in claim 3 is characterized in that a gap is formed between the core and the mold body .
[0011]
According to the third aspect of the present invention, since the gap is formed between the core and the mold main body, the mold main body is hardly affected by the temperature of the core also in this respect.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to FIGS. The synthetic resin sheet 1 of this embodiment has a structure in which a non-woven skin material having a low thermal conductivity is laminated on the lower surface of a thermoplastic resin sheet.
[0013]
On the other hand, the molding apparatus is formed of a lower mold 2 and an upper mold 3 as “molding dies”. The lower mold 2 and the upper mold 3 are formed with inner surfaces 4 and 5 facing each other, and the synthetic resin sheet 1 heated by the inner surfaces 4 and 5 is sandwiched between the inner surfaces 4 and 5 of the synthetic resin sheet 1. A corresponding shape can be given.
[0014]
Further, a cutting portion 6 that circumscribes the side surface of the lower die 2 is formed around the upper die 3 so as to face downward. In other words, when the lower mold 2 and the upper mold 3 are clamped, the synthetic resin sheet 1 is sandwiched between the edge 6e of the cutting portion 6 and the corresponding edge 2e of the lower mold 2 so that unnecessary portions can be removed. (Trimming process).
[0015]
The lower mold 2 is formed as a single piece, but the upper mold 3 is divided into a core 7 and a mold body 8. The core 7 forms the inner surface 5 and is lighter in weight than the mold body 8. The mold body 8 supports the core 7 so as to wrap it, and is heavier than the core 7. Further, the cutting part 6 is formed on the mold body 8. Further, a heat insulating material 9 is interposed between the upper surface of the core 7 and the lower surface of the mold body 8, and a gap 10 is also provided between the side surface of the core 7 and the mold body 8. .
[0016]
The lower mold 2 having such a structure and the upper mold 3 including the core 7 and the mold body 8 are each provided with a plurality of cooling pipes P and heater wires (not shown). The temperature can be adjusted.
[0017]
In this embodiment, since a skin material (not shown) is stuck on the upper surface of the synthetic resin sheet 1 to be molded, the inner surface 5 in contact with the upper surface of the synthetic resin sheet 1 is more than the inner surface 4 in contact with the lower surface. It is necessary to lower the temperature. Specifically, the temperature of the lower inner surface 4 is set to 45 ° C., and the temperature of the upper inner surface 5 is set to 15 ° C. The mold body 8 is adjusted to the same temperature (45 °) as the lower mold 2.
[0018]
According to this embodiment, since the temperature of the lower inner surface 4 is set higher than that of the upper inner surface 5, even in a structure in which a skin material having high heat insulating properties is laminated on the upper surface of the synthetic resin sheet 1, The resin sheet 1 can be reliably molded into a shape corresponding to the inner surfaces 4 and 5. Even if the temperature of the core 7 is different from that of the lower mold 2, the mold body 8 having the cutting part 6 has the same temperature as the lower mold 2 (because it is irrelevant to the core 7). There is no change in the positional relationship between the edge 6e and the edge 2e of the lower mold 2, and a reliable trimming process of the synthetic resin sheet 1 can be performed.
[0019]
Further, the cutting performance by the cutting portion 6 does not change even if the synthetic resin sheet 1 to be molded is changed and the temperature of the core 7 is changed. By changing the temperature of the core 7, the core 7 itself thermally expands or contracts somewhat, but since the periphery is surrounded by the large mold body 8, it is pressed by the mold body 8, The position of the cutting part 6 is not changed. Therefore, the temperature difference between the lower mold 2 and the upper mold 3 can be freely changed, and the versatility of the mold can be enhanced.
[0020]
Furthermore, according to this embodiment, since the heat insulating material 9 and the gap 10 are interposed between the core 7 and the mold body 8, the mold body 8 is not particularly susceptible to the temperature effect of the core 7, The position of the cutting part 6 is not affected at all.
[0021]
【The invention's effect】
According to the first aspect of the present invention, since the inner surface that contacts the synthetic resin sheet is formed in the core, and the cutting portion is formed in another mold body, the cutting can be performed even if the temperature of the core is changed. The position of the part is not affected. Therefore, the temperature difference of the mold can be changed, and the versatility of the mold can be enhanced. Further, each of the core and mold body of the one mold and the other mold has both a heater wire and a cooling pipe, and each of the core, mold body and the other mold of the one mold Can be set to different arbitrary temperatures, so that various synthetic resin sheets can be molded.
[0022]
According to the second aspect of the invention, since the heat insulating material is interposed between the core and the mold body, the mold body is not easily affected by the temperature of the core.
[0023]
According to the third aspect of the present invention, since the gap is formed between the core and the mold main body, the mold main body is hardly affected by the temperature of the core also in this respect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mold before clamping according to an embodiment of the present invention .
2 is a cross-sectional view showing a state after the mold of FIG. 1 is clamped.
[Explanation of symbols]
1 Synthetic resin sheet 2 Lower mold (molding mold)
3 Upper mold (molding mold)
4, 5 Inner surface 6 Cutting part 7 Core 8 Type body 9 Heat insulating material 10 Crevice P Cooling pipe

Claims (3)

一対の成形型の互いに対向する内面で合成樹脂シートを挟んで成形すると共に、一方の成形型に、他方の成形型に外接して合成樹脂シートの不要部分をトリミング処理する切断部が形成された合成樹脂シートの成形装置であって、
前記一方の成形型が、内面を形成する中子と、該中子を包むように支持する型本体とから形成されており、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれに、ヒーター線と冷却管双方を有し、前記一方の成形型の中子と型本体及び他方の成形型のそれぞれを、異なる任意の温度に設定できることを特徴とする合成樹脂シートの成形装置。A pair of molds are molded with the synthetic resin sheet sandwiched between the inner surfaces facing each other, and a cutting portion is formed on one mold to circumscribe the other mold and trim the unnecessary portion of the synthetic resin sheet. A synthetic resin sheet molding apparatus,
The one mold is formed of a core that forms an inner surface and a mold body that supports the core so as to wrap the core, and each of the core, the mold body, and the other mold of the one mold to, a cooling tube both with the heater wire, molding apparatus of the synthetic resin sheet, characterized in that each of said one mold core and the mold body and the other of the mold, can be set to different arbitrary temperature. 請求項１記載の合成樹脂シートの成形装置であって、
前記中子と、前記型本体との間には、断熱材が介在されていることを特徴とする合成樹脂シートの成形装置。A synthetic resin sheet molding apparatus according to claim 1,
A synthetic resin sheet molding apparatus, wherein a heat insulating material is interposed between the core and the mold body. 請求項１又は請求項２記載の合成樹脂シートの成形装置であって、
前記中子と、前記型本体との間には、隙間が形成されていることを特徴とする合成樹脂シートの成形装置。A molding apparatus for a synthetic resin sheet according to claim 1 or 2,
A synthetic resin sheet molding apparatus, wherein a gap is formed between the core and the mold body.
JP19637299A 1999-07-09 1999-07-09 Synthetic resin sheet molding equipment Expired - Fee Related JP4458576B2 (en)

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JP4458576B2 true JP4458576B2 (en) 2010-04-28

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KR20210068639A (en) * 2019-11-25 2021-06-10 주식회사 청하 A Plastic Sheet Appratus with Hollow Structure

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