JP2011073397A - Method for manufacturing acrylic resin molded product - Google Patents

Method for manufacturing acrylic resin molded product Download PDF

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JP2011073397A
JP2011073397A JP2009229543A JP2009229543A JP2011073397A JP 2011073397 A JP2011073397 A JP 2011073397A JP 2009229543 A JP2009229543 A JP 2009229543A JP 2009229543 A JP2009229543 A JP 2009229543A JP 2011073397 A JP2011073397 A JP 2011073397A
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acrylic resin
resin pipe
resin molded
molded product
heating
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Kiyohiro Iseki
清宏 井関
Satoru Ogura
哲 小倉
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SEISHOU KK
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SEISHOU KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an acrylic resin molded product of various cylindrical shape. <P>SOLUTION: The method for manufacturing the acrylic resin molded product includes a heating step for putting and heating a cylindrical acrylic resin pipe 10 in a heating furnace; a die setting step for setting the acrylic resin pipe 10 heated in the heating step to a molding die 40 having a cavity 45 of predetermined shape into the held state of both ends 12; and a gas injection step for injecting gas into the acrylic resin pipe 10 set to the molding die 40 in the die setting step to inflate the acrylic resin pipe 10 along the shape of the cavity 45 of the molding die 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明はアクリル樹脂成型品の製造方法に関する。   The present invention relates to a method for producing an acrylic resin molded product.

金型を用いた樹脂成型品の製造方法の改良について種々の提案がなされている（例えば、特許文献１及び２等）。   Various proposals have been made for improvement of a method for producing a resin molded product using a mold (for example, Patent Documents 1 and 2).

特開２００８−１６２１９８号公報JP 2008-162198 A 特開２００８−９３２４１号公報JP 2008-93241 A

本発明の目的は、多様な筒形状のアクリル樹脂成型品を製造することができる方法を提供することである。   An object of the present invention is to provide a method capable of manufacturing various cylindrical acrylic resin molded products.

本発明のアクリル樹脂成型品の製造方法は、
円筒状のアクリル樹脂パイプを加熱炉に入れて加熱する加熱ステップと、
上記加熱ステップで加熱したアクリル樹脂パイプを、所定形状のキャビティを有する成形型に、両端部が保持された状態にセットする型セットステップと、
上記型セットステップで成形型にセットしたアクリル樹脂パイプにガスを注入して、該成形型のキャビティの形状に沿うように膨張させるガス注入ステップと、
を備える。 The method for producing the acrylic resin molded product of the present invention is as follows.
A heating step of heating a cylindrical acrylic resin pipe in a heating furnace;
A mold setting step for setting the acrylic resin pipe heated in the heating step in a state where both ends are held in a mold having a cavity of a predetermined shape;
A gas injection step of injecting gas into the acrylic resin pipe set in the mold in the mold setting step, and expanding the pipe along the shape of the cavity of the mold; and
Is provided.

本発明によれば、予め加熱したアクリル樹脂パイプを成形型にセットしてガスを注入することにより、多様な筒形状のアクリル樹脂成型品を製造することができる。   According to the present invention, various cylindrical acrylic resin molded products can be manufactured by setting a preheated acrylic resin pipe in a mold and injecting gas.

アクリル樹脂パイプの斜視図である。It is a perspective view of an acrylic resin pipe. 加熱ステップの説明図である。It is explanatory drawing of a heating step. 型セットステップの説明図である。It is explanatory drawing of a type | mold setting step. （ａ）及び（ｂ）はガス注入ステップの説明図である。(A) And (b) is explanatory drawing of a gas injection | pouring step. アクリル樹脂パイプの開口を封じる方法を示す説明図である。It is explanatory drawing which shows the method of sealing the opening of an acrylic resin pipe. アクリル樹脂成型品の斜視図である。It is a perspective view of an acrylic resin molded product. アクリル樹脂成型品の変形例を示す斜視図である。It is a perspective view which shows the modification of an acrylic resin molded product.

以下、実施形態について詳細に説明する。   Hereinafter, embodiments will be described in detail.

本実施形態に係るアクリル樹脂成型品Ａの製造方法は、例えば、筒形状のランプシェード等を製造するものである。   The manufacturing method of the acrylic resin molded product A according to the present embodiment is, for example, manufacturing a cylindrical lamp shade or the like.

＜準備工程＞
本実施形態に係るアクリル樹脂成型品Ａの製造方法では、成形材料として、図１に示すような円筒状のアクリル樹脂パイプ１０を用いる。 <Preparation process>
In the manufacturing method of the acrylic resin molded product A according to the present embodiment, a cylindrical acrylic resin pipe 10 as shown in FIG. 1 is used as a molding material.

ここで、アクリル樹脂パイプ１０は、例えば、長さが５００〜１０００ｍｍ、外径が５０〜２００ｍｍ、内径が４４〜１９４ｍｍ、及び肉厚が２〜５ｍｍである。具体的には、市販のアクリル樹脂パイプ１０としては、瑞穂化成社製やナック・ケイ・エス社のアクリルパイプ等が挙げられる。   Here, the acrylic resin pipe 10 has, for example, a length of 500 to 1000 mm, an outer diameter of 50 to 200 mm, an inner diameter of 44 to 194 mm, and a wall thickness of 2 to 5 mm. Specifically, examples of the commercially available acrylic resin pipe 10 include those made by Mizuho Kasei Co., Ltd., and acrylic pipes manufactured by Nack Kay S Co., Ltd.

＜加熱ステップ＞
本実施形態に係るアクリル樹脂成型品Ａの製造方法では、図２に示すように、アクリル樹脂パイプ１０を加熱炉２０に入れ、支持部材で両端部１２を支持して加熱する。このとき、アクリル樹脂パイプ１０が成型可能となるように可塑化する。 <Heating step>
In the manufacturing method of the acrylic resin molded product A according to the present embodiment, as shown in FIG. 2, the acrylic resin pipe 10 is placed in a heating furnace 20, and both ends 12 are supported by a support member and heated. At this time, the acrylic resin pipe 10 is plasticized so that it can be molded.

ここで、加熱炉２０の炉内設定温度は２４０〜２６０℃とすることが好ましく、２５０℃とすることがより好ましい。また、このときの加熱炉２０内でのアクリル樹脂パイプ１０の温度は１００〜１３０℃とすることが好ましく、１２０℃とすることがより好ましい。   Here, the furnace set temperature of the heating furnace 20 is preferably 240 to 260 ° C, and more preferably 250 ° C. Moreover, it is preferable that the temperature of the acrylic resin pipe 10 in the heating furnace 20 at this time shall be 100-130 degreeC, and it is more preferable to set it as 120 degreeC.

加熱炉２０内でのアクリル樹脂パイプ１０の保持時間は４〜８分とすることが好ましく、５分とすることがより好ましい。   The holding time of the acrylic resin pipe 10 in the heating furnace 20 is preferably 4 to 8 minutes, and more preferably 5 minutes.

また、この加熱ステップにおいてアクリル樹脂パイプ１０の中央の成型予定部分１１以外の両端部１２が熱により変形するのを規制する観点からは、加熱炉２０に入れる前に、アクリル樹脂パイプ１０の両端部１２にそれぞれ放熱用マスキング３１を設けておくことが好ましい。放熱用マスキング３１としては、例えば、不燃性繊維（例えば帝人社製のメタアラミド繊維、商品名：コーネックス）等の帯状布が挙げられる。放熱用マスキング３１を設ける幅は例えば４０〜５０ｍｍである。   In addition, from the viewpoint of restricting the deformation of both end portions 12 other than the central molding target portion 11 of the acrylic resin pipe 10 due to heat in this heating step, the both end portions of the acrylic resin pipe 10 are put into the heating furnace 20. 12 is preferably provided with a mask 31 for heat dissipation. Examples of the heat dissipation masking 31 include belt-like cloths such as non-combustible fibers (for example, meta-aramid fibers manufactured by Teijin Ltd., trade name: Conex). The width for providing the heat radiation masking 31 is, for example, 40 to 50 mm.

アクリル樹脂パイプ１０の形状を保持すると共に均一に加熱する観点からは、アクリル樹脂パイプ１０を、加熱炉２０内で水平に保持して軸回転させることが好ましい。その回転速度は毎分１０〜２０回転とすることが好ましい。   From the viewpoint of maintaining the shape of the acrylic resin pipe 10 and heating it uniformly, it is preferable to hold the acrylic resin pipe 10 horizontally in the heating furnace 20 and rotate the shaft. The rotation speed is preferably 10 to 20 rotations per minute.

＜型セットステップ＞
本実施形態に係るアクリル樹脂成型品Ａの製造方法では、図３に示すように、加熱ステップで加熱したアクリル樹脂パイプ１０を速やかに成形型４０にセットする。 <Type setting step>
In the method for manufacturing the acrylic resin molded product A according to the present embodiment, as shown in FIG. 3, the acrylic resin pipe 10 heated in the heating step is quickly set in the molding die 40.

ここで、成形型４０は、例えば、上型４１及び下型４２に分割可能に構成されており、一方端に、アクリル樹脂パイプ１０の一端を外部に露出させるように保持する一端保持部４３が構成されていると共に、他方端に、アクリル樹脂パイプ１０の他端を保持する他端保持部４４が構成されている。また、成形型４０は、アクリル樹脂パイプ１０の中央の成型予定部分１１に対応して、所定形状のキャビティ４５が形成されている。従って、このとき、アクリル樹脂パイプ１０は、成形型４０内において、一端が外部に露出した状態で一端保持部４３に保持され、また、他端が他端保持部４４に保持され、そして、それらの間の成型予定部分１１がキャビティ４５の中央に位置付けられた状態となる。   Here, the molding die 40 is configured to be divided into, for example, an upper die 41 and a lower die 42, and one end holding portion 43 that holds one end of the acrylic resin pipe 10 to be exposed to the outside at one end. The other end holding portion 44 that holds the other end of the acrylic resin pipe 10 is configured at the other end. Further, the mold 40 has a cavity 45 having a predetermined shape corresponding to the molding target portion 11 at the center of the acrylic resin pipe 10. Accordingly, at this time, the acrylic resin pipe 10 is held by the one end holding portion 43 with one end exposed to the outside in the mold 40, and the other end is held by the other end holding portion 44. The portion 11 to be molded is positioned in the center of the cavity 45.

＜ガス注入ステップ＞
本実施形態に係るアクリル樹脂成型品Ａの製造方法では、図４（ａ）に示すように、型セットステップで成形型４０にセットしたアクリル樹脂パイプ１０にガスを注入する。このとき、図４（ｂ）に示すように、アクリル樹脂パイプ１０の成型予定部分１１が成形型４０のキャビティ４５の形状に沿うように膨張する。 <Gas injection step>
In the manufacturing method of the acrylic resin molded product A according to the present embodiment, as shown in FIG. 4A, gas is injected into the acrylic resin pipe 10 set in the mold 40 in the mold setting step. At this time, as shown in FIG. 4B, the planned molding portion 11 of the acrylic resin pipe 10 expands along the shape of the cavity 45 of the molding die 40.

ここで、アクリル樹脂パイプ１０に注入するガスとしては、例えば、窒素、アルゴン等の不活性ガスの他、空気も挙げられる。ガスは、単一種のガスであってもよく、また、空気のような混合ガスであってもよい。   Here, examples of the gas injected into the acrylic resin pipe 10 include air as well as inert gas such as nitrogen and argon. The gas may be a single kind of gas or a mixed gas such as air.

アクリル樹脂パイプ１０に注入するガスの温度は２０〜４０℃とすることが好ましい。   The temperature of the gas injected into the acrylic resin pipe 10 is preferably 20 to 40 ° C.

アクリル樹脂パイプ１０に注入するガスの圧力は２９４〜４９０ｋＰａとすることが好ましい。   The pressure of the gas injected into the acrylic resin pipe 10 is preferably 294 to 490 kPa.

成形型４０の温度は６０〜８０℃とすることが好ましく、８０℃とすることがより好ましい。   The temperature of the mold 40 is preferably 60 to 80 ° C, and more preferably 80 ° C.

アクリル樹脂パイプ１０内の圧力を容易に高めることができるという観点からは、加熱ステップで加熱炉２０に入れる前の段階で、アクリル樹脂パイプ１０の一方端の開口をガス注入孔５２を有するように封じ、且つ他方端の開口を密封することが好ましい。具体的には、図５に示すように、アクリル樹脂パイプ１０の一方端に、ガス注入孔５２が形成されたアクリル樹脂円板５１を接着剤を介して接着することにより開口を封じ、同様に、アクリル樹脂パイプ１０の他方端にアクリル樹脂円板５１を接着剤を介して接着することにより開口を封じればよい。アクリル樹脂円板５１は、アクリル樹脂パイプ１０の外径と同一乃至それよりも大きい外径を有し、そのためアクリル樹脂パイプ１０の端面に当接するように設けられてもよく、また、アクリル樹脂パイプ１０の内径と同一の外径を有し、そのためアクリル樹脂パイプ１０の開口に内嵌めされるように設けられてもよい。アクリル樹脂円板５１の厚さは例えば３〜５ｍｍである。ガス注入孔５２の孔径は例えば６〜１０ｍｍである。接着剤は、アクリル樹脂系接着剤、エポキシ樹脂接着剤等の熱硬化性樹脂接着剤が好ましい。   From the viewpoint that the pressure in the acrylic resin pipe 10 can be easily increased, the opening at one end of the acrylic resin pipe 10 is provided with a gas injection hole 52 before entering the heating furnace 20 in the heating step. It is preferable to seal and seal the opening at the other end. Specifically, as shown in FIG. 5, an acrylic resin disc 51 in which a gas injection hole 52 is formed is adhered to one end of the acrylic resin pipe 10 through an adhesive, thereby sealing the opening. The opening may be sealed by adhering the acrylic resin disc 51 to the other end of the acrylic resin pipe 10 with an adhesive. The acrylic resin disc 51 has an outer diameter that is the same as or larger than the outer diameter of the acrylic resin pipe 10, and therefore may be provided so as to contact the end surface of the acrylic resin pipe 10. 10 has the same outer diameter as that of the inner diameter 10, and therefore may be provided to be fitted into the opening of the acrylic resin pipe 10. The thickness of the acrylic resin disc 51 is 3 to 5 mm, for example. The hole diameter of the gas injection hole 52 is, for example, 6 to 10 mm. The adhesive is preferably a thermosetting resin adhesive such as an acrylic resin adhesive or an epoxy resin adhesive.

＜脱型ステップ＞
本実施形態に係るアクリル樹脂成型品Ａの製造方法では、成型予定部分１１が成形型４０のキャビティ４５の形状に沿うように膨張して所定の形状に形成されたアクリル樹脂パイプ１０を成形型４０から脱型する。なお、脱型前に、成形型４０を空冷或いは水冷し、また、アクリル樹脂パイプ１０内に冷却ガスを注入することによりアクリル樹脂パイプ１０の冷却を行ってもよい。 <Demolding step>
In the manufacturing method of the acrylic resin molded product A according to the present embodiment, the acrylic resin pipe 10 formed into a predetermined shape by expanding so that the part 11 to be molded follows the shape of the cavity 45 of the mold 40 is formed into the mold 40. Demold from. Before removing the mold, the mold 40 may be cooled with air or water, and the acrylic resin pipe 10 may be cooled by injecting a cooling gas into the acrylic resin pipe 10.

そして、脱型したアクリル樹脂パイプ１０から両端部１２の余長部を切断して、図６に示すようなアクリル樹脂成型品Ａを得る。   And the excess length part of the both ends 12 is cut | disconnected from the demolded acrylic resin pipe 10, and the acrylic resin molded product A as shown in FIG. 6 is obtained.

以上の本実施形態に係るアクリル樹脂成型品Ａの製造方法によれば、予め加熱したアクリル樹脂パイプ１０を成形型４０にセットしてガスを注入することにより、図６に示すような形状の他、図７に示すような断面略矩形の角柱状のもの等、多様な筒形状のアクリル樹脂成型品Ａを製造することができる。   According to the manufacturing method of the acrylic resin molded product A according to the above-described embodiment, the acrylic resin pipe 10 heated in advance is set in the molding die 40 and gas is injected, so that the shape shown in FIG. A variety of cylindrical acrylic resin molded products A such as a prismatic shape having a substantially rectangular cross section as shown in FIG. 7 can be manufactured.

本発明はアクリル樹脂成型品の製造方法について有用である。   The present invention is useful for a method for producing an acrylic resin molded article.

Ａ アクリル樹脂成型品
１０ アクリル樹脂パイプ
１１ 成型予定部分
１２ 端部
２０ 加熱炉
２１ 支持部材
３１ 放熱用マスキング
４０ 成形型
４１ 上型
４２ 下型
４３ 一端保持部
４４ 他端保持部
４５ キャビティ
５１ アクリル樹脂円板
５２ ガス注入孔 A Acrylic resin molded product 10 Acrylic resin pipe 11 Molded portion 12 End 20 Heating furnace 21 Support member 31 Heat dissipation masking 40 Mold 41 Upper die 42 Lower die 43 One end holding portion 44 Other end holding portion 45 Cavity 51 Acrylic resin circle Plate 52 Gas injection hole

Claims (4)

円筒状のアクリル樹脂パイプを加熱炉に入れて加熱する加熱ステップと、
上記加熱ステップで加熱したアクリル樹脂パイプを、所定形状のキャビティを有する成形型に、両端部が保持された状態にセットする型セットステップと、
上記型セットステップで成形型にセットしたアクリル樹脂パイプにガスを注入して、該成形型のキャビティの形状に沿うように膨張させるガス注入ステップと、
を備えたアクリル樹脂成型品の製造方法。 A heating step of heating a cylindrical acrylic resin pipe in a heating furnace;
A mold setting step for setting the acrylic resin pipe heated in the heating step in a state where both ends are held in a mold having a cavity of a predetermined shape;
A gas injection step of injecting gas into the acrylic resin pipe set in the mold in the mold setting step, and expanding the pipe along the shape of the cavity of the mold; and
A method for producing an acrylic resin molded product comprising 請求項１に記載されたアクリル樹脂成型品の製造方法において、
上記加熱ステップで加熱炉に入れる前のアクリル樹脂パイプの両端部にそれぞれ放熱用マスキングを設けるアクリル樹脂成型品の製造方法。 In the manufacturing method of the acrylic resin molded product according to claim 1,
A method for producing an acrylic resin molded article, in which heat radiation masking is provided at both ends of the acrylic resin pipe before entering the heating furnace in the heating step. 請求項１又は２に記載されたアクリル樹脂成型品の製造方法において、
上記加熱ステップで加熱炉に入れる前のアクリル樹脂パイプの一方端の開口をガス注入孔を有するように封じ、且つ他方端の−開口を密封するアクリル樹脂成型品の製造方法。 In the manufacturing method of the acrylic resin molded product according to claim 1 or 2,
A method for producing an acrylic resin molded article in which an opening at one end of an acrylic resin pipe before entering the heating furnace in the heating step is sealed so as to have a gas injection hole, and the-opening at the other end is sealed. 請求項１乃至３のいずれかに記載されたアクリル樹脂成型品の製造方法において、
上記加熱ステップで、アクリル樹脂パイプを、加熱炉内で水平に保持して軸回転させるアクリル樹脂成型品の製造方法。 In the manufacturing method of the acrylic resin molded product according to any one of claims 1 to 3,
A method for producing an acrylic resin molded article, wherein the acrylic resin pipe is horizontally held in a heating furnace and rotated in the heating step.
JP2009229543A 2009-10-01 2009-10-01 Method for manufacturing acrylic resin molded product Pending JP2011073397A (en)

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CN103692641A (en) * 2013-12-17 2014-04-02 叶斌 Automatic equipment and production method for producing lampshades
CN103692640A (en) * 2013-12-17 2014-04-02 叶斌 Automatic forming machine and production method for lampshade
CN105773916A (en) * 2015-01-09 2016-07-20 株式会社小糸制作所 Mold For Resin Molded Part And Method Of Manufacturing Resin Molded Part

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