JPS61143113A - Method for molding low fluidity synthetic resin - Google Patents
Method for molding low fluidity synthetic resinInfo
- Publication number
- JPS61143113A JPS61143113A JP59264519A JP26451984A JPS61143113A JP S61143113 A JPS61143113 A JP S61143113A JP 59264519 A JP59264519 A JP 59264519A JP 26451984 A JP26451984 A JP 26451984A JP S61143113 A JPS61143113 A JP S61143113A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- liquid organic
- billet
- powder
- molding
- 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
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、低流動性の合成樹脂を成形する方法に関する
。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method for molding a synthetic resin with low fluidity.
（従来技術）
低流動性樹脂は、混練ができないため、スクリューを用
いた押出成形が不可能である。このため、従来では特開
昭５６−３８２４３号公報に示すラム押出法や、ペース
ト押出法を用いでいる。(Prior Art) Low fluidity resins cannot be kneaded and therefore cannot be extruded using a screw. For this reason, conventionally, a ram extrusion method or a paste extrusion method as disclosed in JP-A-56-38243 has been used.
ラム押出法は、少量の低流動性合成樹脂の粉体を押出成
形装置内に装填し、合成樹脂の融点以上で加熱するとと
もにラムによって加圧することにより、粉体間の空気を
除去しながら粉体同士を融着して成形し、次にラムを後
退させてさらに少量の粉体を金型に装填し、以下、上記
と同じ動作を繰り返す。しかし、上記のラム押出法では
、内部空気を除去するために合成樹脂を少量ずつしか成
形で外す、成形時間が非常に長かった。In the ram extrusion method, a small amount of low-fluidity synthetic resin powder is loaded into an extrusion molding device, heated above the melting point of the synthetic resin, and pressurized by a ram to extrude the powder while removing air between the powders. The bodies are fused together and molded, then the ram is retracted to load an additional small amount of powder into the mold, and the same operation as above is repeated. However, in the above-mentioned ram extrusion method, the synthetic resin was molded out only in small amounts in order to remove internal air, and the molding time was extremely long.
ペースト押出法は、ふっ素樹脂の成形に広く利用されて
いる。詳述すると、低流動性合成樹脂の粉体に比較的沸
点の低い有機溶剤を混合し、この混合原料を押出成形装
置内に装填し、ラムにより比較的弱い圧力で加圧するこ
とによりビレットを予備成形する。次に、ラムによりビ
レットを加圧してダイ部から押し出して成形品を得る。Paste extrusion methods are widely used for molding fluororesins. Specifically, an organic solvent with a relatively low boiling point is mixed with a powder of a low-flow synthetic resin, the mixed raw material is loaded into an extrusion molding device, and a billet is prepared by pressurizing it with a relatively weak pressure using a ram. Shape. Next, the billet is pressurized by a ram and extruded from the die to obtain a molded product.
次に、成形品を乾燥し、有機溶剤を蒸発させて除去する
。Next, the molded article is dried and the organic solvent is removed by evaporation.
最後に、成形品を合成樹脂の融点より高い温度で焼成し
て最終製品を得る。このペースト押出法では、押出成形
の速度を向上させることができるが、有機溶剤の抽出、
焼成の工程が必要であり、工程数が多く生産性が低かっ
た。Finally, the molded article is fired at a temperature higher than the melting point of the synthetic resin to obtain the final product. This paste extrusion method can improve the extrusion speed, but the extraction of organic solvents and
A firing process was required, resulting in a large number of steps and low productivity.
（発明の目的）
本発明は上記事情に基づきなされたもので、その目的は
、低流動性合成樹脂を生産性良く成形できる低流動性合
成樹脂の成形方法を提供することにある。 ′”
（発明の要旨）
本発明の要旨は、低流動性合成樹脂の粉体に、この合成
樹脂の融点より高い沸点を有する液状の有機物を混合し
、この混合材料を、合成樹脂の融点と液状有機物の沸点
との間の温度で加熱するとともに加圧子ることにより、
液状有機物を逃がすとともに粉体同士を融着してビレッ
トを成形し、このビレットを固相状態で押出成形するこ
とを特徴とする低流動性合成樹脂の成形方法にある。(Objective of the Invention) The present invention was made based on the above-mentioned circumstances, and its object is to provide a method for molding a low-fluidity synthetic resin by which the low-flowability synthetic resin can be molded with good productivity. ’” (Summary of the Invention) The gist of the present invention is to mix a liquid organic substance having a boiling point higher than the melting point of the synthetic resin with a powder of a low-flow synthetic resin, and to mix this mixed material with the melting point of the synthetic resin. By heating at a temperature between the boiling point of liquid organic matter and using a pressurizer,
A method for molding a low-fluidity synthetic resin is characterized in that a billet is formed by releasing liquid organic matter and fusing powders together, and extrusion molding the billet in a solid state.
（発明の構成）
まず、本発明方法を実施するための押出成形装置の一例
を図面を参照して説明する。この装置は、シリンダ一部
１と、ダイ部２とを有している。シリンダ一部１は内部
に軸方向に沿って延びる空洞３を有しており、ダイ部２
は空洞３に連通する樹脂通路４を有してい□る。樹脂通
路４は、出口側に向かって、大径部４ａ、断面積減少部
４ｂ、断面積が変わらない平行部４ｃを有している。(Structure of the Invention) First, an example of an extrusion molding apparatus for carrying out the method of the present invention will be described with reference to the drawings. This device has a cylinder part 1 and a die part 2. The cylinder part 1 has a cavity 3 extending along the axial direction inside, and the die part 2
has a resin passage 4 communicating with the cavity 3. The resin passage 4 has, toward the exit side, a large diameter portion 4a, a reduced cross-sectional area portion 4b, and a parallel portion 4c whose cross-sectional area does not change.
シリンダ一部１には、加熱手段としてのし−タ−６が空
洞３を囲むようにして螺旋状に埋め込まれるとともに、
冷却手段としての冷却水通路７が螺旋状に形成されてい
る。A heater 6 as a heating means is spirally embedded in the cylinder part 1 so as to surround the cavity 3.
A cooling water passage 7 serving as a cooling means is formed in a spiral shape.
ダイ部２には、加熱手段としてのヒーター８が樹脂通路
４を囲むようにして螺旋状に埋め込まれている。A heater 8 serving as a heating means is spirally embedded in the die portion 2 so as to surround the resin passage 4.
シリンダ一部１の空洞３にはラム９が挿入されて軸方向
に移動するようになっている。A ram 9 is inserted into the cavity 3 of the cylinder part 1 and is adapted to move in the axial direction.
上記構成の装置により、本発明方法を実施する。The method of the present invention is carried out using the apparatus configured as described above.
まず、低流動性合成樹脂の粉体に液状の有機物を混ぜる
ことにより、混合材料１０を用意する。合成樹脂には、
超高分子量のポリエチレン、芳香族ポリアミド、ポリイ
ミド、芳香族ポリエステル等が用いられる。液状有機物
は合成樹脂の融点より高い沸点を有しており、例えば脂
肪族炭化水素、芳香族炭化水素、シリコンオイル等が用
いられるが、合成樹脂粉体をぬらしやすい液状の有機物
が好ましい。合成樹脂と液状有機物の配合比（重量比）
は、１：１〜１００：１の範囲が好ましい。液状有機物
が１：１より多くなると成形品に多量残ってしまい、物
性の低下を引とおこす。１００：１より少ないと所望の
効果（後述する空気除去効果、加熱媒体としての効果）
を発揮でトないからである。First, a mixed material 10 is prepared by mixing a liquid organic substance with a powder of a low-flow synthetic resin. For synthetic resin,
Ultra-high molecular weight polyethylene, aromatic polyamide, polyimide, aromatic polyester, etc. are used. The liquid organic substance has a boiling point higher than the melting point of the synthetic resin, and for example, aliphatic hydrocarbons, aromatic hydrocarbons, silicone oil, etc. are used, but liquid organic substances that easily wet the synthetic resin powder are preferred. Blending ratio (weight ratio) of synthetic resin and liquid organic matter
is preferably in the range of 1:1 to 100:1. If the ratio of liquid organic matter exceeds 1:1, a large amount will remain in the molded product, causing deterioration of physical properties. If it is less than 100:1, the desired effect (air removal effect, effect as a heating medium, which will be described later)
This is because it is not possible to demonstrate this.
ダイ部２には、前工程で固相成形されたビレット１１の
一部１１ａが未成形のまま残されており、ダイ部２の樹
脂通路４を閉塞している。A portion 11a of the billet 11 that has been solid-phase molded in the previous step remains unmolded in the die portion 2, and blocks the resin passage 4 of the die portion 2.
上記混合材料１０を、第１図に示すようにシリンダ一部
１内に装填し、ヒーター６により加熱するとともに、ラ
ム９によって加圧することにより、第２図に示すように
ビレット１２を成形する。上記加熱は、合成樹脂の融点
以上、液状有機物の沸点以下の温度で行なわれ、これに
よって粉体同士が融着するとともに、シリンダ一部１内
での液状有機物の気化を防止する。液状有機物は、ラム
９の加圧により、第２図中矢印で示すように、ラム９の
外周面とシリンダ一部１の内周面との開のわずかな隙間
から漏れ出てい外、粉体から除去される。上記のように
、ビレット１２の成形、粉体の融着、液状有機物の除去
を同時に行なうことができる。The mixed material 10 is loaded into a cylinder part 1 as shown in FIG. 1, heated by a heater 6, and pressurized by a ram 9 to form a billet 12 as shown in FIG. The heating is performed at a temperature above the melting point of the synthetic resin and below the boiling point of the liquid organic material, thereby fusing the powders together and preventing vaporization of the liquid organic material within the cylinder part 1. Due to the pressurization of the ram 9, the liquid organic matter leaks out from a small gap between the outer peripheral surface of the ram 9 and the inner peripheral surface of the cylinder part 1, as shown by the arrow in FIG. removed from As described above, shaping of the billet 12, fusion of powder, and removal of liquid organic matter can be performed simultaneously.
液状有機物は次の作用をする。まず、粉体との混合の際
、粉体間に入り込んで、粉体間の空気を排除し、混合材
料１０中の空気の含有量を少なくすることがでとる。ま
た、上述したように、加圧時にラム９とシリンダ一部１
の間から漏れ出る際、混合材料中に残留していた空気を
包含した状態で漏れ出てくる。したか゛って、ビレット
１２の成形の際、空気を迅速かつ確実に除去でとる。Liquid organic matter has the following effects. First, when mixing with powder, the air enters between the powder and eliminates the air between the powder, thereby reducing the air content in the mixed material 10. In addition, as mentioned above, when pressurizing, the ram 9 and the cylinder part 1
When the mixed material leaks out from the gap, it leaks out along with the air remaining in the mixed material. Therefore, when forming the billet 12, air can be quickly and reliably removed.
また、液状有機物は、ヒーター６の熱を合成樹脂の粉体
に伝達する熱媒体の作用をする。したがって、粉体への
熱伝達を効率良く行なうことができ、混合材料の加熱時
間を短縮でとるとともに、粉体同士の融着を迅速かつ確
実に行なえる。Further, the liquid organic substance acts as a heat medium that transfers the heat of the heater 6 to the synthetic resin powder. Therefore, heat can be efficiently transferred to the powder, the heating time of the mixed material can be shortened, and the powder can be fused together quickly and reliably.
上述したように、液状有機物により、空気の除去および
、粉体の融着を迅速に効率良く行なえるため、ビレット
１２の成形速度を大幅に向上できる。また、空気の除去
および粉体の融着を確実に行なえるので、ビレット１２
の密度ひいては成形品の密度を高くすることがでとる。As described above, since the liquid organic substance allows air to be removed and powder to be fused quickly and efficiently, the molding speed of the billet 12 can be significantly improved. In addition, since air removal and powder fusion can be performed reliably, billet 12
This can be achieved by increasing the density of the molded product.
また、液状有機物により粉体への熱伝達を効率良く行な
えるので、混合材料の加熱温度を合成樹脂の融点より若
干高い程度の温度例えば１０°Ｃ〜３０°Ｃ高い程度に
抑えることができ、従来法に比較して低い温度で粉体の
融着を行なうことができる。このため、高温による合成
樹脂の分解を防止でとる。、
ビレット１２の成形後に、冷却水通路７に冷却水を供給
して、ビレット１２を固相成形に適した温度、すなわも
合成樹脂のガラス転移点具」二、融点以下の温度範囲に
なるように冷却する。なお、上述したように、上記ビレ
ット１２の成形時の加熱温度を比較的低い温度に抑えて
いるため、冷却を短時間に行なえとともに、冷却手段を
簡略化できる。一方、前工程で成形されたビレット１１
の一部１１ａは、ダイ部２のヒーター８により、固相成
形に適した温度に維持されている。In addition, since the liquid organic substance can efficiently transfer heat to the powder, the heating temperature of the mixed material can be suppressed to a temperature slightly higher than the melting point of the synthetic resin, for example, 10°C to 30°C higher. Powder can be fused at a lower temperature compared to conventional methods. This prevents the synthetic resin from decomposing due to high temperatures. After forming the billet 12, cooling water is supplied to the cooling water passage 7 to bring the billet 12 to a temperature suitable for solid phase molding, that is, a temperature range below the melting point of the synthetic resin. Cool it down. As described above, since the heating temperature during molding of the billet 12 is suppressed to a relatively low temperature, cooling can be performed in a short time and the cooling means can be simplified. On the other hand, the billet 11 formed in the previous process
A portion 11a of the die section 2 is maintained at a temperature suitable for solid phase molding by the heater 8 of the die section 2.
次に、ラム９で加圧することにより、ビレット１２およ
びダイ部２に残っていたビレット１１の一部１１ａを、
固相状態で押出成形する。固相状態で成形するため、成
形後の冷却工程を省略でき、強制冷却に伴なう変形や歪
みを解消して寸法精度を向上させることができる。Next, by applying pressure with the ram 9, the billet 12 and the part 11a of the billet 11 remaining in the die part 2 are
Extrusion molding in solid state. Since molding is performed in a solid state, the cooling process after molding can be omitted, and dimensional accuracy can be improved by eliminating deformation and distortion caused by forced cooling.
次にラム９を、ビレット１２の一部をダイ部２に残した
位置で停止させ、後退させる。以下、同じ作動を繰り返
す。Next, the ram 9 is stopped at a position where a portion of the billet 12 remains in the die part 2, and is moved back. The same operation is then repeated.
本発明は上記実施例に制約されず種々の態様が可能であ
る。例えば、中空の製品を成形する場合にはマンドレル
付きのラムを用いればよく、任意の断面形状の製品を成
形できる。The present invention is not limited to the above embodiments, and various embodiments are possible. For example, when molding a hollow product, a ram with a mandrel may be used, and a product with any cross-sectional shape can be molded.
また、混合材料を押出成形装置に装填する前に予備加熱
し、押出成形装置内での加熱を省略ないしは補助的に行
なうようにしてもよい。Further, the mixed material may be preheated before being loaded into the extrusion molding apparatus, and heating within the extrusion molding apparatus may be omitted or supplementary.
さらに、上記実施例では、１台の押出成形装置により、
ビレッｔの成形と押出成形を行なったが、ビレットの成
形を一端が閉塞された筒形状の金型内で行ない、成形さ
れたビレットを金型から取り出して押出成形装置に装填
し、ここで固相押出成形を行なうようにしてもよい。Furthermore, in the above embodiment, one extrusion molding device allows
The billet was formed and extruded in a cylindrical mold with one end closed, and the formed billet was taken out of the mold and loaded into an extrusion molding device, where it was solidified. Phase extrusion molding may also be performed.
以下の成形を試みた。融点が約１３０°Ｃの超高分子量
ポリエチレンを１００重量部、沸点２００°Ｃの流動パ
ラフィンを３０重量部の割合で混合し、１５５°Ｃで２
時間予備加熱した後、押出成形装置に装填し、押出成形
装置に設けられたヒーターによって上記温度を維持しな
がら、マンドレル付きのラムで９０ＭＰａの押出圧力で
約３分加圧し、外形Ｓ、０１１１１１１．内径２１．．
５ｍｍの管形状のビレットを得た。次に、押出成形装置
内でビレットを１０５’Ｃに冷却した後、再びラムで押
出圧力 ・１００ＭＰａ、成形速度１０ｃｍ／ｎ＋ｉｎ
で押出成形し、外径３０．５＋ｕ＋、内径２１．５ｖｎ
の管形状の最終成形品を得た。成形品の外観は良好であ
った。I tried the following molding. 100 parts by weight of ultra-high molecular weight polyethylene with a melting point of about 130°C and 30 parts by weight of liquid paraffin with a boiling point of 200°C were mixed, and the mixture was heated at 155°C for 2 hours.
After preheating for a time, it was loaded into an extrusion molding device, and while the above temperature was maintained by a heater installed in the extrusion molding device, it was pressurized with an extrusion pressure of 90 MPa for about 3 minutes using a ram equipped with a mandrel. Inner diameter 21. ．．
A 5 mm tube-shaped billet was obtained. Next, after cooling the billet to 105'C in the extrusion molding apparatus, extrusion pressure is again applied to the ram at 100 MPa, molding speed 10 cm/n+in.
Extrusion molded with outer diameter 30.5+u+, inner diameter 21.5vn
A final molded product in the shape of a tube was obtained. The appearance of the molded product was good.
（発明の効果）
以上説明したように、本発明によれば、低流動性合成樹
脂の粉体に合成樹脂の融点より高い沸点を有する液状の
有機物を混合させることにより、粉体間の空気を迅速か
つ確実に除去できるとともに、合成樹脂の粉体同士の融
着を迅速かつ確実に行なえるため、ビレットの成形速度
を向上でき、また、ビレットの成形、粉体の融着、液状
の有機物の除去を同時に行なうので工程が簡略化し生産
性を向上できる。(Effects of the Invention) As explained above, according to the present invention, by mixing a liquid organic substance having a boiling point higher than the melting point of the synthetic resin with the powder of a low-flow synthetic resin, the air between the powders is removed. In addition to being able to quickly and reliably remove synthetic resin powders, it is also possible to quickly and reliably fuse synthetic resin powders together, increasing the billet forming speed. Since removal is performed at the same time, the process can be simplified and productivity can be improved.
図面は本発明を実施するための押出成形装置の一例を示
し、第１図は混合材料を充填した状態、第２図はビレッ
トの成形完了後の状態をそれぞれ示す。The drawings show an example of an extrusion molding apparatus for carrying out the present invention, with FIG. 1 showing the state filled with a mixed material, and FIG. 2 showing the state after the molding of the billet is completed.
Claims (5)
より高い沸点を有する液状の有機物を混合し、この混合
材料を、合成樹脂の融点と液状有機物の沸点との間の温
度で加熱するとともに加圧することにより、液状有機物
を逃がすとともに粉体同士を融着してビレットを成形し
、このビレットを固相状態で押出成形することを特徴と
する低流動性合成樹脂の成形方法。(1) A liquid organic substance having a boiling point higher than the melting point of the synthetic resin is mixed with a powder of a low-flow synthetic resin, and the mixed material is heated at a temperature between the melting point of the synthetic resin and the boiling point of the liquid organic substance. A method for molding a low-flow synthetic resin, which is characterized by heating and pressurizing to release liquid organic matter and fusing powders together to form a billet, and extrusion molding this billet in a solid state.
１〜１００：１の範囲にすることを特徴とする特許請求
の範囲第１項に記載の低流動性合成樹脂の成形方法。(2) The blending weight ratio of the synthetic resin and liquid organic substance is 1:
The method for molding a low-flow synthetic resin according to claim 1, wherein the ratio is in the range of 1 to 100:1.
徴とする特許請求の範囲第１項に記載の低流動性合成樹
脂の成形方法。(3) The method for molding a low-flow synthetic resin according to claim 1, wherein the liquid organic substance is an aliphatic hydrocarbon.
徴とする特許請求の範囲第１項に記載の低流動性合成樹
脂の成形方法。(4) The method for molding a low-flow synthetic resin according to claim 1, wherein the liquid organic substance is an aromatic hydrocarbon.
徴とする特許請求の範囲第１項に記載の低流動性合成樹
脂の成形方法。(5) The method for molding a low-flow synthetic resin according to claim 1, wherein the liquid organic substance is silicone oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59264519A JPS61143113A (en) | 1984-12-17 | 1984-12-17 | Method for molding low fluidity synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59264519A JPS61143113A (en) | 1984-12-17 | 1984-12-17 | Method for molding low fluidity synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61143113A true JPS61143113A (en) | 1986-06-30 |
| JPH0149101B2 JPH0149101B2 (en) | 1989-10-23 |
Family
ID=17404375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59264519A Granted JPS61143113A (en) | 1984-12-17 | 1984-12-17 | Method for molding low fluidity synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61143113A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5096654A (en) * | 1987-07-24 | 1992-03-17 | The National Research And Development Corporation | Solid phase deformation process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136424A (en) * | 1982-02-09 | 1983-08-13 | Mitsuboshi Belting Ltd | Ram extrusion-molding method for resin containing lubricant |
-
1984
- 1984-12-17 JP JP59264519A patent/JPS61143113A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136424A (en) * | 1982-02-09 | 1983-08-13 | Mitsuboshi Belting Ltd | Ram extrusion-molding method for resin containing lubricant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5096654A (en) * | 1987-07-24 | 1992-03-17 | The National Research And Development Corporation | Solid phase deformation process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0149101B2 (en) | 1989-10-23 |
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