JPH02158309A - Manufacture of one-piece type blow molded article - Google Patents
Manufacture of one-piece type blow molded articleInfo
- Publication number
- JPH02158309A JPH02158309A JP31314188A JP31314188A JPH02158309A JP H02158309 A JPH02158309 A JP H02158309A JP 31314188 A JP31314188 A JP 31314188A JP 31314188 A JP31314188 A JP 31314188A JP H02158309 A JPH02158309 A JP H02158309A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- core material
- melting point
- rear spoiler
- temperature
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 238000000465 moulding Methods 0.000 claims abstract description 43
- 239000011162 core material Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 26
- 230000008018 melting Effects 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 19
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 24
- 238000000071 blow moulding Methods 0.000 abstract description 9
- 229910000743 fusible alloy Inorganic materials 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 239000003292 glue Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000001175 rotational moulding Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 210000000329 smooth muscle myocyte Anatomy 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、所定の成形樹脂材料を用いて中空成形品を一
体に成形するための新規な手法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a novel method for integrally molding a hollow molded product using a predetermined molding resin material.
（背景技術）
所定の成形樹脂材料を用いて成形される中空成形品の中
に、使用成形樹脂材料や成形品に要求される性能等の制
約から、ブロー成形や回転成形等の既知の中空成形手法
では一体に成形することが困難乃至は不可能なものがあ
る。そこで、それらブロー成形や回転成形等の既知の中
空成形手法によっては一体に成形し得ない中空成形品は
、その中空成形品を複数に分割した構造の分割構成部品
を別々に成形した後、それら分割構成部品を接着剤で接
着して製造することが一般に行なわれている。(Background technology) Known blow molding methods such as blow molding and rotary molding are used in hollow molded products molded using a predetermined molding resin material due to constraints such as the molding resin material used and the performance required of the molded product. There are some methods that make it difficult or impossible to mold them in one piece. Therefore, for hollow molded products that cannot be molded in one piece using known hollow molding methods such as blow molding or rotational molding, the hollow molded product is divided into multiple parts, which are then molded separately. It is common practice to manufacture split components by bonding them together with an adhesive.
例えば、成形樹脂材料としてＳＭＣを用いる自動車用リ
ヤスポイラ−は、従来既知の中空成形手法では一体に成
形し得ないことから、第７図に示されているように、ア
ッパ部材２とロア部材４とを別々に成形した後、それら
の周縁部に設けた接着面を接着剤で後接着して製造され
ている。For example, an automobile rear spoiler using SMC as a molding resin material cannot be molded in one piece using the conventionally known blow molding method, so as shown in FIG. It is manufactured by molding the two separately and then bonding the adhesive surfaces provided on their peripheral edges with an adhesive.
ところが、かかる自動車用リヤスポイラ−の製造手法の
ように、別々に成形した複数の分割構成部品を後接着す
ることによって中空成形品を製造する従来の手法では、
各分割構成部品を成形するための複数組の成形型が必要
なことは勿論、通常、第７図に示されているように、各
分割構成部品の接着面に段差を設ける必要があることか
ら、金型が複雑になるといった問題があり、また各分割
構成部品についてパリ取り工程が必要になると共に、分
割構成部品の接着に際して、接着剤の掻き取り工程およ
び接着面の仕上げ工程が必要になることから、その製造
工程が極めて多くなるといった問題もあった。更に、複
数の部品を接着剤で接着して中空体に仕上げることから
、中空成形品の機械的強度に対する信頼性が必ずしも高
いとは言えないといった問題もあった。However, in the conventional method of manufacturing a hollow molded product by gluing together a plurality of separately molded component parts, such as the method of manufacturing a rear spoiler for an automobile,
Not only is it necessary to use multiple sets of molds to mold each divided component, but it is also usually necessary to provide a step on the bonding surface of each divided component, as shown in Figure 7. , there is a problem that the mold becomes complicated, and a deburring process is required for each divided component, and a process of scraping the adhesive and finishing the adhesive surface is required when bonding the divided components. Therefore, there was a problem in that the number of manufacturing steps was extremely large. Furthermore, since a plurality of parts are bonded together with an adhesive to form a hollow body, there is also the problem that the reliability of the mechanical strength of the hollow molded article is not necessarily high.
（解決課題）
本発明は、このような事情を背景として為されたもので
あり、その解決すべき課題とするところは、ブロー成形
や回転成形等の既知の中空成形手法では一体に成形する
ことが困難乃至は不可能であった前記自動車用リヤスポ
イラ−の如き中空成形品を、一体中空成形品として一体
に成形することが可能な新規な中空成形品の製造手法を
提供することにある。(Problem to be solved) The present invention was made against the background of the above-mentioned circumstances, and the problem to be solved is that known hollow molding methods such as blow molding and rotational molding cannot be molded in one piece. It is an object of the present invention to provide a new method for manufacturing a hollow molded product, which makes it possible to integrally mold a hollow molded product such as the rear spoiler for an automobile as an integral hollow molded product, which has been difficult or impossible to do.
（解決手段）
そして、その課題を解決するために、本発明にあっては
、所定の成形樹脂材料を用いて一体中空成形品を製造す
るに際して、（ａ）成形樹脂材料の成形温度よりは高い
が、成形樹脂材料の耐熱温度よりは低い融点を有する低
融点合金で中子材を成形する工程と、（ｂ）その中子材
を所定の成形型にセットして、上記成形樹脂材料を用い
て成形を行ない、中子材を内部に包蔵した状態の一体中
空成形品を成形する工程と、（ｃ）中子材を構成する低
融点合金の融点よりは高く、成形樹脂材料の耐熱温度よ
りは低い温度でその一体中空成形品を加熱し、一体中空
成形品内に包蔵された中子材を熔融して、一体中空成形
品に設けた流出孔からその中子材を構成する低融点合金
を流出させる工程とを、含むようにしたのである。(Solution Means) In order to solve the problem, in the present invention, when manufacturing an integral hollow molded product using a predetermined molding resin material, (a) the molding temperature is higher than the molding temperature of the molding resin material. However, a step of molding a core material with a low melting point alloy having a melting point lower than the heat resistance temperature of the molding resin material, and (b) setting the core material in a predetermined mold and using the molding resin material as described above. (c) a step of forming an integral hollow molded product with the core material encapsulated therein; heats the integral hollow molded product at a low temperature, melts the core material contained within the integral hollow molded product, and releases the low melting point alloy that makes up the core material through the outflow hole provided in the integral hollow molded product. This includes a step of draining the water.
（作用）
このような手法によれば、ブロー成形や回転成形等の従
来既知の中空成形手法では採用することが困難乃至は不
可能であった成形樹脂材料や成形手法、例えばＳＭＣや
ＢＭＣ等の成形樹脂材料やＲ１（レジン・インジェクシ
ョン）法等を採用して一体中空成形品を製造することが
できるのである。そしてそれ故、本発明に従う一体中空
成形品の製造手法の採用により、ＳＭＣを成形樹脂材料
とする自動車用リヤスポイラ−のように、従来、成形品
を複数に分割した構造の分割構成部品を別々に成形した
後、それらを接着剤で接着して製造していた中空成形品
を、一体中空成形品として製造することが可能となった
のである。(Function) According to such a method, molding resin materials and molding methods such as SMC and BMC, which are difficult or impossible to employ with conventionally known hollow molding methods such as blow molding and rotational molding, can be used. An integral hollow molded product can be manufactured using a molding resin material, R1 (resin injection) method, or the like. Therefore, by adopting the manufacturing method of the integral hollow molded product according to the present invention, divided component parts, which have conventionally been constructed by dividing a molded product into multiple parts, such as an automobile rear spoiler using SMC as a molded resin material, can be separated. Hollow molded products, which were previously manufactured by bonding them together with adhesive after molding, can now be manufactured as integral hollow molded products.
（実施例）
以下、本発明をより一層具体的に明らかにするために、
その一実施例を図面に基づいて詳細に説明する。なお、
ここでは、ＳＭＣを成形樹脂材料として用いて、第１図
および第２図に示されている如き、一体中空構造の自動
車用リヤスポイラ１０を製造する場合について、その実
施例を説明する。(Example) Hereinafter, in order to clarify the present invention more specifically,
One embodiment thereof will be described in detail based on the drawings. In addition,
Here, an example will be described in which an automobile rear spoiler 10 having an integral hollow structure as shown in FIGS. 1 and 2 is manufactured using SMC as a molding resin material.
すなわち、第１図および第２図に示す構造のりヤスボイ
ラー１０を製造するには、先ず、第３図に示すように、
複数の分割型（ここでは、上型１２および下型１４）か
らなる中子成形型１６を用い、その中子成形型１６のキ
ャビティ１８内に、後述のりヤスボイラー１０の成形温
度よりは高く、リヤスポイラ−１０を構成するＳＭＣの
耐熱温度よりは低い融点を有する所定の低融点合金溶湯
を溶湯注入口２０を通じて注入して、リヤスポイラ−１
０の内部空間２２に対応した形状の中子材２４を成形す
る。That is, in order to manufacture the steel boiler 10 having the structure shown in FIGS. 1 and 2, first, as shown in FIG.
A core mold 16 consisting of a plurality of split molds (in this case, an upper mold 12 and a lower mold 14) is used, and in the cavity 18 of the core mold 16, the molding temperature is higher than the molding temperature of the glue filer boiler 10, which will be described later. A predetermined low melting point alloy molten metal having a melting point lower than the heat resistance temperature of the SMC constituting the rear spoiler 10 is injected through the molten metal injection port 20 to create the rear spoiler 1.
A core material 24 having a shape corresponding to the internal space 22 of 0 is molded.
なお、中子成形型１６の上型１２には、キャビティ１８
内への低融点合金溶湯の注入に伴ってキャビティ１８内
の空気を外部に排出させるための空気排出孔２５を設け
ておく。また、かがる中子成形型１６を用いた中子材２
４の成形に際しては、中子成形型１６のキャビティ１８
内への低融点合金溶湯の注入時において、中子成形型１
６をその低融点合金の融点付近の温度まで予め加熱して
おくことが望ましい。Note that the upper mold 12 of the core mold 16 has a cavity 18.
An air discharge hole 25 is provided for discharging the air within the cavity 18 to the outside as the low melting point alloy molten metal is injected into the cavity. In addition, the core material 2 using the core molding die 16
4, the cavity 18 of the core mold 16 is
When pouring the low melting point alloy molten metal into the core mold 1
It is desirable to heat 6 in advance to a temperature near the melting point of the low melting point alloy.
上述のようにして中子材２４が得られたならば、次いで
、その中子材２４を、第４図に示すように、上型２６お
よび下型２８からなるＳＭＣ成形型３０の下型２８上に
、成形樹脂材料であるＳＭＣ３２，３４で上下に挟むよ
うに乃至は包むようにしてセットする。そして、前記中
子材２４を構成する低融点合金の融点よりも低い所定の
温度に成形型３０（上型２６および下型２８）を予熱し
た状態で上型２６を下降させ、上型２６と下型２８との
間でＳＭＣ３２，３４を圧縮成形する。Once the core material 24 has been obtained as described above, the core material 24 is then placed in the lower mold 28 of the SMC mold 30 consisting of the upper mold 26 and the lower mold 28, as shown in FIG. The SMCs 32 and 34, which are molded resin materials, are set on the top so as to sandwich or wrap them vertically. Then, with the mold 30 (upper mold 26 and lower mold 28) preheated to a predetermined temperature lower than the melting point of the low melting point alloy constituting the core material 24, the upper mold 26 is lowered, and the upper mold 26 and The SMCs 32 and 34 are compression molded between the lower mold 28 and the lower mold 28 .
このようにすれば、中子材２４を上下で挾むよように乃
至は包むように配置されたＳＭＣ３２３４が、相対応す
る周縁部で一体に接合されて、第５図に示されているよ
うに、前記中子材２４を内部に包蔵した状態のりヤスボ
イラー１ｏが得られるのである。In this way, the SMCs 3234, which are arranged to sandwich or wrap the core material 24 at the top and bottom, are joined together at the corresponding peripheral parts, as shown in FIG. , a glue sand boiler 1o is obtained in which the core material 24 is enclosed inside.
内部に中子材２４を一体に包蔵したりヤスボイラー１０
が得られたならば、そのリヤスポイラ−１０を所定の加
熱装置、例えば第６図に示すように、高周波誘導加熱装
置３６にセットする。そして、その高周波誘導加熱装置
３６にて、中子材２４を構成する低融点合金の融点より
は高く、リヤスポイラ−１０を構成する硬化後のＳＭＣ
の耐熱温度、すなわちリヤスポイラ−１ｏの形状を損な
わず、リヤスポイラ−１０を構成するＳＭＣを劣化させ
ないような温度よりも低い温度に中子材２４を加熱して
、リヤスポイラ−１０をそのままの形状に保持させつつ
、中子材２４だけを溶融させ、リヤスポイラ−１０に設
けた合金流出孔３８からその溶融した低融点合金を外部
に流出させる。これにより、前記第１図および第２図に
示した一体中空構造のりヤスボイラー１０が得られるの
である。なお、上記低融点合金を流出させるための合金
流出孔３８は、前記リヤスポイラ−１ｏの圧縮成形時に
形成してもよく、あるいはりヤスボイラー１０の圧縮成
形後において後加工して形成するようにしてもよい。The core material 24 is integrally contained inside the Yasu boiler 10.
Once obtained, the rear spoiler 10 is set in a predetermined heating device, for example, a high frequency induction heating device 36 as shown in FIG. The high-frequency induction heating device 36 then heats the hardened SMC, which has a melting point higher than that of the low melting point alloy that makes up the core material 24 and makes up the rear spoiler 10.
The core material 24 is heated to a temperature lower than the heat-resistant temperature, that is, a temperature that does not damage the shape of the rear spoiler 1o and does not deteriorate the SMC that constitutes the rear spoiler 10, and maintains the rear spoiler 10 in its original shape. At the same time, only the core material 24 is melted, and the molten low melting point alloy is allowed to flow out from the alloy outflow holes 38 provided in the rear spoiler 10. As a result, the integral hollow structure gauze boiler 10 shown in FIGS. 1 and 2 can be obtained. The alloy outflow hole 38 for flowing out the low melting point alloy may be formed during compression molding of the rear spoiler 1o, or may be formed by post-processing after compression molding of the file boiler 10. Good too.
このように、本実施例手法によれば、従来、第７図に示
したように、ＳＭＣを用いてアッパ部材２とロア部材４
とを別々に成形した後、それらを接着剤で接着して製造
していた中空の自動車用リヤスポイラ−を、一体中空成
形品として得ることができるのである。従って、従来の
りヤスボイラーよりも、リヤスポイラ−の機械的強度を
大幅に向上できることとなったのであり、またアッパ部
材２とロア部材４との継目を無くして、リヤスポイラ−
の外観を大幅に向上できることとなったのである。As described above, according to the method of this embodiment, as shown in FIG. 7, the upper member 2 and the lower member 4 are
A hollow rear spoiler for an automobile, which was manufactured by separately molding the two parts and then bonding them together with an adhesive, can now be obtained as an integral hollow molded product. Therefore, the mechanical strength of the rear spoiler can be significantly improved compared to the conventional glue boiler, and the joint between the upper member 2 and the lower member 4 is eliminated, and the rear spoiler
This made it possible to significantly improve the appearance of the product.
また、本実施例手法によれば、前述のように、リヤスポ
イラ−１０の製造に際して、ＳＭＣ成形型を一組に低減
できると共に、成形品であるリヤスポイラ−１０に接着
面を形成する必要がないことから、従来手法のＳＭＣ成
形型に比べて、ＳＭＣ成形型の構造を大幅に簡略化する
ことが可能になったのであり、更には接着工程を不要に
為し得たことから、接着剤の掻き取り工程や接着面の仕
上げ工程をも不要と為して、その製造工程を大幅に簡略
化することが可能にもなったのである。Further, according to the method of this embodiment, as described above, when manufacturing the rear spoiler 10, the number of SMC molds can be reduced to one set, and there is no need to form an adhesive surface on the rear spoiler 10, which is a molded product. This made it possible to greatly simplify the structure of the SMC mold compared to conventional SMC molds, and also eliminate the need for the adhesive process. It has also become possible to greatly simplify the manufacturing process by eliminating the need for the removal process and the finishing process for the adhesive surface.
以上、本発明の一実施例を詳細に説明したが、これは文
字通りの例示であり、本考案が、かかる具体例に限定さ
れるものではなく、その趣旨を逸脱しない範囲内におい
て、種々なる変更、修正改良等を施した態様で実施でき
ることは、言うまでもないところである。Although one embodiment of the present invention has been described in detail above, this is a literal illustration, and the present invention is not limited to this specific example, and various modifications may be made without departing from the spirit thereof. It goes without saying that the present invention can be implemented with modifications and improvements.
例えば、前記実施例では、ＳＭＣを成形樹脂材料とする
自動車用リヤスポイラ−の製造に本発明を適用した例に
ついて述べたが、自動車用リヤスポイラ−以外の、ＳＭ
Ｃを成形樹脂材料とする中空成形品の製造にも、本発明
を適用することが可能であり、またＢＭＣや他の熱硬化
性樹脂材料、さらには熱可塑性樹脂材料を成形樹脂材料
とする中空成形品の製造にも、本発明を適用することが
可能である。更に、本発明手法において、中子材を包蔵
した中空成形品の成形に際しては、Ｒ１法等の成形手法
をも採用することが可能である。For example, in the above embodiment, an example was described in which the present invention was applied to the manufacture of an automobile rear spoiler using SMC as a molding resin material.
The present invention can also be applied to the manufacture of hollow molded products using C as the molding resin material, and can also be applied to the manufacture of hollow molded products using BMC, other thermosetting resin materials, and even thermoplastic resin materials as the molding resin material. The present invention can also be applied to the production of molded products. Furthermore, in the method of the present invention, when molding a hollow molded product containing a core material, it is also possible to employ a molding method such as the R1 method.
（発明の効果）
以上の説明から明らかなように、本発明に従う一体中空
成形品の製造手法によれば、従来既知の手法では一体に
成形できず、分割構成部品を別々に成形した後、それら
を接着剤で接着して製造していた中空成形品を、一体中
空成形品として製造して、その中空成形品の機械的強度
並びに外観を大幅に向上できるといった利点があるので
あり、またそのような従来の手法に比べて、成形樹脂材
料の成形型数を低減できると共に、その成形型の構造を
簡略化できるといった利点もあるのであり、更には接着
工程を不要と為し得ることから、その製造工程をも大幅
に簡略化できるといった利点もあるのである。(Effects of the Invention) As is clear from the above explanation, according to the method of manufacturing an integral hollow molded product according to the present invention, it is not possible to integrally mold the component parts using conventionally known methods. Hollow molded products, which were previously manufactured by bonding them with adhesive, can now be manufactured as integral hollow molded products, which has the advantage of greatly improving the mechanical strength and appearance of the hollow molded products. Compared to conventional methods, this method has the advantage of reducing the number of molds for molding resin material and simplifying the structure of the mold.Furthermore, it eliminates the need for an adhesion process. Another advantage is that the manufacturing process can be greatly simplified.
第１図は、本発明手法に従って製造される一体中空成形
品としての自動車用リヤスポイラ−の外観を示す斜視図
であり、第２図は、第１図のりヤスボイラーの横断面図
である。第３図、第４図および第６図は、それぞれ、第
１図のりヤスボイラーの製造工程を説明するための説明
図であり、第５図は、第４図のりヤスボイラーの成形工
程によって製造される、中子材を包蔵したりヤスボイラ
ーの横断面図である。第７図は、自動車用リヤスポイラ
−の従来の製造手法を説明するための説明図である。
１０：リヤスポイラ−１６：中子成形型２４：中子材
３０ ： ＳＭＣ成形型３２．３４ ：ＳＭＣ（
成形樹脂材料）３６：高周波誘導加熱装置
３８二合金流出孔FIG. 1 is a perspective view showing the appearance of an automobile rear spoiler as an integral hollow molded product manufactured according to the method of the present invention, and FIG. 2 is a cross-sectional view of the glue boiler shown in FIG. 1. Figures 3, 4, and 6 are explanatory diagrams for explaining the manufacturing process of the glue sand boiler shown in Figure 1, respectively, and Figure 5 is an explanatory diagram for explaining the manufacturing process of the glue sand boiler shown in Figure 4. It is a cross-sectional view of a Yasu boiler containing core material. FIG. 7 is an explanatory diagram for explaining a conventional manufacturing method of an automobile rear spoiler. 10: Rear spoiler - 16: Core mold 24: Core material
30: SMC mold 32.34: SMC (
Molding resin material) 36: High frequency induction heating device 38 Two alloy outflow holes
Claims (1)
方法にして、 前記成形樹脂材料の成形温度よりは高いが、該成形樹脂
材料の耐熱温度よりは低い融点を有する低融点合金で中
子材を成形する工程と、 該中子材を所定の成形型にセットして、前記成形樹脂材
料を用いて成形を行ない、該中子材を内部に包蔵した状
態の一体中空成形品を成形する工程と、 前記中子材を構成する低融点合金の融点よりは高く、前
記成形樹脂材料の耐熱温度よりは低い温度で該一体中空
成形品を加熱し、該一体中空成形品内に包蔵された中子
材を溶融して、該一体中空成形品に設けた流出孔から該
中子材を構成する低融点合金を流出させる工程とを、 含むことを特徴とする一体中空成形品の製造方法。[Claims] A method for producing an integral hollow molded article using a predetermined molding resin material, the method comprising: having a melting point higher than the molding temperature of the molding resin material but lower than the heat resistance temperature of the molding resin material. A process of molding a core material from a low melting point alloy, and setting the core material in a predetermined mold and molding it using the molding resin material, and forming an integral product with the core material encapsulated inside. a step of molding a hollow molded product; heating the integral hollow molded product at a temperature higher than the melting point of the low melting point alloy constituting the core material but lower than the heat resistance temperature of the molding resin material; An integral hollow body characterized by comprising the step of melting a core material contained within the product and causing a low melting point alloy constituting the core material to flow out from an outflow hole provided in the integral hollow molded product. Method of manufacturing molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31314188A JPH02158309A (en) | 1988-12-12 | 1988-12-12 | Manufacture of one-piece type blow molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31314188A JPH02158309A (en) | 1988-12-12 | 1988-12-12 | Manufacture of one-piece type blow molded article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02158309A true JPH02158309A (en) | 1990-06-18 |
Family
ID=18037593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31314188A Pending JPH02158309A (en) | 1988-12-12 | 1988-12-12 | Manufacture of one-piece type blow molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02158309A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206708A (en) * | 2015-05-28 | 2017-09-26 | 宝马股份公司 | Method for manufacturing SMC hollow units |
-
1988
- 1988-12-12 JP JP31314188A patent/JPH02158309A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206708A (en) * | 2015-05-28 | 2017-09-26 | 宝马股份公司 | Method for manufacturing SMC hollow units |
| CN107206708B (en) * | 2015-05-28 | 2020-06-30 | 宝马股份公司 | Method for manufacturing SMC hollow members |
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