JP2006035582A - Resin molding method and resin molding screw - Google Patents

Resin molding method and resin molding screw Download PDF

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JP2006035582A
JP2006035582A JP2004217408A JP2004217408A JP2006035582A JP 2006035582 A JP2006035582 A JP 2006035582A JP 2004217408 A JP2004217408 A JP 2004217408A JP 2004217408 A JP2004217408 A JP 2004217408A JP 2006035582 A JP2006035582 A JP 2006035582A
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resin molding
screw
zone
resin
surface roughness
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Manabu Sasane
学 笹根
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Japan Steel Works Ltd
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Japan Steel Works Ltd
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    • 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
    • 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
    • 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/62—Screws characterised by the shape of the thread channel, e.g. U-shaped

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent burning, yellowing, or the formation of a black spot by roughening the surface of a channel part in advance by a sand blasting method and forming a carbonized film. <P>SOLUTION: In a resin molding method and a resin molding screw, the surface roughness (9) of the channel parts (7) of a compression zone (5) and a metering zone (6) is formed by roughening in advance by the sand blasting method so that an insulating layer by the carbonized film is formed in the channel part (7) to prevent the burning, the yellowing, or the formation of the black spot. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、樹脂成形加工方法及び樹脂成形加工用スクリュに関し、特に、コンプレッションゾーン及びメータリングゾーンの溝部の面粗度をサンドブラスト法によって予め粗すことにより形成し、成形時に溝部に溶融樹脂の付着（炭化膜）による断熱層を形成し、樹脂成形品の焼け、黄変又は黒点の形成を防止し、品質を向上させるための新規な改良に関する。   The present invention relates to a resin molding processing method and a resin molding processing screw, and in particular, is formed by pre-roughening the surface roughness of a groove portion of a compression zone and a metering zone by a sandblast method, and adhesion of molten resin to the groove portion during molding. The present invention relates to a novel improvement for improving the quality by forming a heat insulating layer by (carbonized film), preventing the resin molded product from being burnt, yellowing or forming black spots.

従来、用いられていたこの種の射出成形機及び押出機等に用いるための樹脂成形加工用スクリュとしては、図１及び図２に示される構成が採用されていた。
すなわち、図１及び図２に示されるように、従来の樹脂成形加工用スクリュは、その機能上、スクリュ本体１を挿入したシリンダ（図示しない加熱筒）に供給する原料樹脂を予熱しつつ搬送するフィードゾーン４と、前記原料樹脂を圧縮加熱、いわゆる樹脂がせん断されて発熱させるコンプレッションゾーン５と、前記コンプレッションゾーン５で可塑化された溶融樹脂を均一混練して先端に溜めるメータリングゾーン６の各部から構成されている。 Conventionally, the configuration shown in FIGS. 1 and 2 has been adopted as a resin molding screw for use in this type of injection molding machine and extruder.
That is, as shown in FIG. 1 and FIG. 2, the conventional resin molding processing screw conveys the raw material resin supplied to the cylinder (heating cylinder (not shown)) in which the screw body 1 is inserted while preheating. Each part of the feed zone 4, the compression zone 5 that compresses and heats the raw material resin, that is, the resin is sheared to generate heat, and the metering zone 6 that uniformly kneads the molten resin plasticized in the compression zone 5 and collects it at the tip It is composed of

前記従来のスクリュ本体１にあっては、山部８の頂面を除いたもの、もしくは含んだもののスクリュ本体１全ての面粗度９が、算術平均粗さＲａで０．２〜０．８の研磨仕上げやバフ仕上げがなされていた。
また、従来の面粗度として特許文献１に開示の透明な光学用成形品でも、０．４Ｓ〜０．８Ｓ（０．１〜０．２Ｒａ）の効果が認められているが、飽くまでも溶融樹脂の付着を防ぐやり方でいわゆる、射出機業界では一般的な対策である。 In the conventional screw body 1, the surface roughness 9 of the screw body 1 except for or including the top surface of the peak portion 8 is 0.2 to 0.8 in terms of arithmetic average roughness Ra. Polishing finish and buff finish were made.
Further, even with the transparent optical molded product disclosed in Patent Document 1 as the conventional surface roughness, an effect of 0.4 S to 0.8 S (0.1 to 0.2 Ra) has been recognized, It is a general measure in the so-called injection machine industry in a way to prevent the adhesion of the resin.

特開平６−２４６８０３号公報JP-A-6-246803

従来の樹脂成形加工用スクリュは、以上のように構成されていたため、次のような課題が存在していた。すなわち、面粗度を上げても一般に金属に付着し易い樹脂、例えばＰＣ、ＰＭＭＡ、ＬＤ−ＰＥなどは製造過程で添加剤が含まれているため一般グレード以外の特殊グレードの樹脂になれば、例えば内部滑剤を多く含んだ樹脂では、溶融粘度が下がり流動性は良くなるもののスクリュデザイン上の各コーナ部に溶融樹脂が滞留し黄変や焼けを誘発していた。また難燃剤を多く含んだ樹脂は、シリンダの設定温度及び上述のせん断熱の影響によって樹脂の分子が熱分解を起こし燃焼するケースもあった。
そのため、面粗度を上げて特殊な樹脂に対応するにも限界があり、また最近では特殊なコーティング例えば、ＴｉＣ、ＴｉＮ処理や無電解Ｎｉメッキをスクリュ表面に施し対応しているが樹脂のグレードに応じては問題が発生することと、コーティング自身の費用が高価ゆえ、他の方法が不可欠であった。
なお、上述の燃焼に至るまでが、黄変や焼けの現象で炭素の状態まで進むと黒点の発生となり成形品の品質を満足させることができなかった。 Since the conventional resin molding process screw is configured as described above, the following problems exist. In other words, even if the surface roughness is increased, a resin that is generally easy to adhere to a metal, such as PC, PMMA, LD-PE, etc. contains additives in the manufacturing process, so if it becomes a special grade resin other than the general grade, For example, in a resin containing a large amount of an internal lubricant, although the melt viscosity is lowered and the fluidity is improved, the molten resin stays at each corner portion on the screw design to induce yellowing and burning. In addition, the resin containing a large amount of the flame retardant sometimes burns due to thermal decomposition of the resin molecules due to the influence of the set temperature of the cylinder and the above-described shear heat.
For this reason, there is a limit to increasing the surface roughness and supporting special resins, and recently, special coatings such as TiC and TiN treatment and electroless Ni plating are applied to the screw surface, but the resin grade Depending on the problem, other methods were indispensable due to the problem and the high cost of the coating itself.
It should be noted that until the above-described combustion progressed to the carbon state due to the phenomenon of yellowing or burning, black spots were generated and the quality of the molded product could not be satisfied.

本発明による樹脂成形加工方法は、樹脂成形機に用いられフィードゾーン、コンプレッションゾーン及びメータリングゾーンを有するスクリュ本体の前記コンプレッションゾーン及びメータリングゾーンの溝部の面粗度をサンドブラスト法により予め粗して形成することにより、少なくとも前記溝部に炭化膜による断熱層を形成し、成形される樹脂成形品の焼け、黄変又は黒点の形成を防止する方法であり、また、前記面粗度の粗さを、算術表面粗さで１．５〜２．５Ｒａにする方法であり、また、前記溝部の表面には、少なくとも硬質クロームメッキ、ＴｉＣ、ＴｉＮの表面コーティングの何れかからなるコーティング面が形成され、前記コーティング面は前記サンドブラスト法によって予め粗されている方法であり、また、本発明による樹脂成形加工用スクリュは、樹脂成形機に用いられフィードゾーン、コンプレッションゾーン及びメータリングゾーンを有するスクリュ本体からなる樹脂成形加工用スクリュにおいて、前記コンプレッションゾーン及びメータリングゾーンの溝部の面粗度は、サンドブラスト法によって予め粗して形成した構成であり、また、前記面粗度の粗さを、算術表面粗さで１．５〜２．５Ｒａにした構成であり、また、前記溝部の表面には、少なくとも硬質クロームメッキ、ＴｉＣ、ＴｉＮの表面コーティングの何れかからなるコーティング面が形成され、前記コーティング面は前記サンドブラスト法によって予め粗されている構成である。   The resin molding processing method according to the present invention is used in a resin molding machine to preliminarily roughen the surface roughness of the groove of the compression zone and metering zone of the screw body having a feed zone, a compression zone and a metering zone by a sandblast method. Forming a heat insulating layer made of a carbonized film at least in the groove portion to prevent the resin molded product being molded from being burnt, yellowed or formed with black spots, and the roughness of the surface roughness is reduced. In addition, the arithmetic surface roughness is 1.5 to 2.5 Ra, and the surface of the groove is formed with a coating surface composed of at least hard chrome plating, TiC, or TiN surface coating, The coating surface is a method that has been previously roughened by the sandblasting method, and according to the present invention. The screw for fat molding processing is a resin molding processing screw that is used in a resin molding machine and includes a screw body having a feed zone, a compression zone, and a metering zone, and the surface roughness of the grooves of the compression zone and metering zone is: It is a configuration formed by roughing in advance by a sand blast method, and the roughness of the surface roughness is a configuration in which the arithmetic surface roughness is 1.5 to 2.5 Ra, and the surface of the groove is A coating surface made of at least one of hard chrome plating, TiC, and TiN surface coating is formed, and the coating surface is roughened in advance by the sandblast method.

本発明による樹脂成形加工方法及び樹脂成形加工用スクリュは、以上のように構成されているため、次のような効果を得ることができる。
すなわち、コンプレッションゾーン及びメータリングゾーンの溝部の面粗度をサンドブラスト法によって予め粗して粗面状に形成することにより、樹脂の成分（添加剤）を利用し、炭化膜による断熱層を形成し、また、その粗さを１．５〜２．５Ｒａにすることで強固に造ることができる。
その結果、樹脂成形時の樹脂の表面の温度上昇を防ぎ、成形品の焼け、黄変又は黒点の発生を防ぐことができ、成形品の品質向上及び歩留まりの向上を得ることができる。 Since the resin molding processing method and the resin molding processing screw according to the present invention are configured as described above, the following effects can be obtained.
In other words, the surface roughness of the grooves in the compression zone and metering zone is preliminarily roughened by sandblasting to form a rough surface, thereby using a resin component (additive) to form a heat insulating layer made of carbonized film. Moreover, it can be made strong by making the roughness 1.5-2.5Ra.
As a result, the temperature rise of the surface of the resin during resin molding can be prevented, the molded product can be prevented from burning, yellowing or black spots, and the quality of the molded product and the yield can be improved.

本発明は、コンプレッションゾーン及びメータリングゾーンの溝部の面粗度をサンドブラスト法によって予め粗して粗面状にとすることにより、成形時に溝部に樹脂の添加剤によって炭化膜による断熱層を形成し、樹脂成形品の焼け、黄変又は黒点の形成を防止し、品質を向上させることを目的とする。   In the present invention, the surface roughness of the grooves in the compression zone and the metering zone is preliminarily roughened by a sandblasting method to form a rough surface, thereby forming a heat insulating layer with a carbonized film in the groove with a resin additive during molding. An object of the present invention is to prevent the resin molded product from being burned, yellowed, or formed black spots, and to improve the quality.

以下、図面と共に本発明による樹脂成形加工方法及び樹脂成形加工用スクリュの好適な実施の形態について説明する。
尚、図１及び図２の構成は、従来例と本発明と同一に共用しているため、従来と同一部分は同一符号を用いて説明する。
図１の射出成形機（押出機も可）のスクリュ本体１にはその先端に逆流防止リング３が取付けられている。このスクリュ本体１は螺子を形成する山部８と、この山部８の間に存在する溝部７とからなる。この山部８の頂面はスクリュ本体１を図示しない加熱筒またはシリンダの内孔に挿入するため、シリンダの内孔径より僅かに小さい外径寸法に加工してある。この山部８と溝部７における加工面の面粗度は算術表面粗さＲａで０．２〜０．８程度である。
また山部８からの溝部７の深さは、スクリュ本体１の根元（図面右端）から先端に向かって浅くなっている。すなわち、スクリュ本体１の根元には図示しない原料樹脂の落下口があり、フィードゾーン４が始まる。
このフィードゾーン４は深い谷部を有し、メータリングゾーン６はこれよりも浅い谷部を有する。また、コンプレッションゾーン５はフィードゾーン４とメータリングゾーン６の間にあり、その谷部は先端に向かってしだいに浅くなるテーパ形状で前後のゾーン４、６の谷部と滑らかに接続されている。 Hereinafter, preferred embodiments of a resin molding processing method and a resin molding processing screw according to the present invention will be described with reference to the drawings.
1 and 2 are used in common with the conventional example and the present invention, the same parts as those of the conventional example will be described using the same reference numerals.
A backflow prevention ring 3 is attached to the tip of the screw body 1 of the injection molding machine (or an extruder) shown in FIG. The screw body 1 includes a peak portion 8 that forms a screw and a groove portion 7 that exists between the peak portions 8. The top surface of the peak portion 8 is machined to have an outer diameter slightly smaller than the inner hole diameter of the cylinder in order to insert the screw body 1 into an inner hole of a heating cylinder or cylinder (not shown). The surface roughness of the processed surface in the peak portion 8 and the groove portion 7 is about 0.2 to 0.8 in terms of arithmetic surface roughness Ra.
Further, the depth of the groove portion 7 from the peak portion 8 is shallower from the root (right end of the drawing) of the screw body 1 toward the tip. That is, there is a raw material resin dropping port (not shown) at the base of the screw body 1, and the feed zone 4 starts.
The feed zone 4 has a deep valley, and the metering zone 6 has a shallower valley. The compression zone 5 is located between the feed zone 4 and the metering zone 6, and its valley is tapered so that it gradually becomes shallower toward the tip, and is smoothly connected to the valleys of the front and rear zones 4, 6. .

図１におけるＢ−Ｂ拡大図を示した図２に示すように、前記落下口から供給された原料樹脂は山部８の移送面１０から力を受けて前方へ搬送される。このため従来の技術においては溝部７の面粗度９を前述のＲａの粗さで０．２〜０．８程度にする理由として、溶融樹脂がスクリュ表面に付着せず、また剥がれ易くするためである。しかしながら特殊グレードの樹脂、例えば添加剤が少ない透明なＰＣのパウダ原材料においては、この樹脂の結晶性部位が占める割合から明確な溶融温度を有し、その温度で急速に溶融することに起因して、特にコンプレッションゾーン５においてすでに部分的に溶融し搬送力が生じない、いわゆる付着してしまう現象が起こる。また、かかる事態では付着した溶融樹脂がスクリュ本体１の表面の温度とせん断熱で堆積が始まる。   As shown in FIG. 2 showing an enlarged view of B-B in FIG. 1, the raw material resin supplied from the dropping port receives force from the transfer surface 10 of the peak portion 8 and is conveyed forward. For this reason, in the prior art, the reason why the surface roughness 9 of the groove portion 7 is about 0.2 to 0.8 in terms of the aforementioned Ra is to prevent the molten resin from adhering to the screw surface and to be easily peeled off. It is. However, special grade resins, such as transparent PC powder raw materials with few additives, have a clear melting temperature from the proportion occupied by the crystalline portion of the resin and are melted rapidly at that temperature. In particular, in the compression zone 5, there occurs a so-called adhesion phenomenon in which the material is already partially melted and no conveying force is generated. In such a situation, the deposited molten resin starts to be deposited by the temperature of the surface of the screw body 1 and the shear heat.

そこで、図２に示す面粗度９を色々検討＆試行した結果、サンドブラスト法によって予めＲａの粗さで１．５〜２．５にすることで上述の溶融樹脂の付着を誘発し堆積物（炭化膜による断熱層）を強固にすることで焼け、黄変や黒点の発生を防ぐことができた。
次に、図３は前述の面粗度の粗し方法によるＰＣパウダ原材料でのテストデータを示す。その結果、同条件でテストを行ったところ、短期間（３日目）で安定した良品を成形することができた。但し、本発明を実施しなければ、約２ケ月近く日数が掛かっていた。
また、グラフ内の滞留前ｂ値とは、色差計による数値（ｂ値）で４前後の値が良品になる。
以上説明したように本発明によれば、樹脂の成分（添加剤）を利用し、スクリュ本体１の表面の面粗度９を粗くする方法として、サンドブラスト法を利用しているため断熱層（炭化膜）を速く形成でき、またその粗さを１．５〜２．５Ｒａにすることで強固に造ることができた。
この発明により溶融樹脂の表面の温度上昇を防ぎ、成形品の焼け、黄変および黒点の安定防止に極めて効果的である。 Therefore, as a result of various examinations and trials on the surface roughness 9 shown in FIG. 2, the adhesion of the above-mentioned molten resin is induced by setting the roughness of Ra to 1.5 to 2.5 in advance by the sandblast method. By strengthening the heat insulation layer of the carbonized film, it was possible to prevent burning, yellowing and black spots.
Next, FIG. 3 shows test data on a PC powder raw material by the aforementioned surface roughness roughening method. As a result, when the test was performed under the same conditions, a stable good product could be molded in a short period (third day). However, if the present invention was not carried out, it took about two months.
Further, the b value before staying in the graph is a numerical value (b value) obtained by a color difference meter, and a value around 4 is a non-defective product.
As described above, according to the present invention, since the sand blasting method is used as a method for roughening the surface roughness 9 of the surface of the screw body 1 using a resin component (additive), a heat insulating layer (carbonized) Film) can be formed quickly, and it can be made strong by setting its roughness to 1.5 to 2.5 Ra.
According to the present invention, the temperature rise of the surface of the molten resin is prevented, and it is extremely effective for preventing the burnt, yellowing and black spots of the molded product.

また、前述のように、前記スクリュ本体１のコンプレッションゾーン５及びメータリングゾーン６の溝部の表面に形成されている少なくとも硬質クロームメッキ、ＴｉＣ、ＴｉＮの表面コーティングの何れかからなるコーティング面には前記サンドブラスト法による粗状面が形成されているため、炭化膜による絶縁層が形成され、前述と同様に焼け、黄変又は黒点の形成を防止することができる。   In addition, as described above, the coating surface formed of at least one of hard chrome plating, TiC, and TiN surface coating formed on the surface of the groove portion of the compression zone 5 and metering zone 6 of the screw body 1 Since the rough surface is formed by the sandblasting method, an insulating layer made of a carbonized film is formed, and it is possible to prevent burning, yellowing or formation of black spots as described above.

すなわち、本発明は、実際使用する使用樹脂の添加剤の熱劣化を利用し、樹脂が予め予熱されサンドブラスト法によって粗面に形成された溝部７のスクリュ表面に接触することと、成形過程で樹脂がフィードゾーン４から移送されコンプレッションゾーン５にかかると、移送過程で予熱された樹脂は強烈に圧縮されせん断されて発熱する。
この予熱と発熱により樹脂の表面の高分子が輻射熱や滞留、伝導による温度の上昇によって分解をはじめ燃焼が継続する特性を利用することで、樹脂表面に輻射熱を反射する物質を堆積すること、いわゆる断熱層や炭化膜を形成することによって樹脂の温度上昇を防止することができる。
従って、スクリュ溝部７の面粗度９の粗さを鋭意研究した結果１．５〜２．５Ｒａにすることで、断熱層を短期間で形成でき、また上述の数値で強固に断熱層を形成することができるため断熱層の剥がれ、いわゆる黒点の発生も少なくすることができるものである。
また、スクリュ本体１の溝部７に形成され硬質クロームメッキ、ＴｉＣ、ＴｉＮの何れかによって形成されたコーティング面にサンドブラスト法によって粗面を形成することによって、前述の断熱層を形成することができる。 That is, the present invention utilizes the thermal deterioration of the additive of the resin actually used, and the resin is preheated in advance and comes into contact with the screw surface of the groove portion 7 formed into a rough surface by the sand blasting method. Is transferred from the feed zone 4 and applied to the compression zone 5, the resin preheated in the transfer process is intensely compressed and sheared to generate heat.
By using the preheating and heat generation, the polymer on the surface of the resin accumulates a material that reflects the radiant heat on the resin surface by utilizing the property that the decomposition continues due to the increase in temperature due to radiant heat, retention, and conduction, so-called By forming the heat insulating layer or the carbonized film, the temperature rise of the resin can be prevented.
Therefore, as a result of diligent research on the roughness of the surface roughness 9 of the screw groove portion 7, the heat insulating layer can be formed in a short period of time by setting it to 1.5 to 2.5 Ra, and the heat insulating layer is firmly formed with the above-mentioned numerical values. Therefore, it is possible to reduce the exfoliation of the heat insulating layer and so-called black spots.
Moreover, the above-mentioned heat insulation layer can be formed by forming a rough surface by the sandblasting method on the coating surface formed by any one of hard chrome plating, TiC, and TiN formed in the groove portion 7 of the screw body 1.

本発明は、射出成形だけではなく、押出成形にも適用可能である。   The present invention is applicable not only to injection molding but also to extrusion molding.

本発明及び従来用いられるスクリュ本体を示す構成図である。It is a block diagram which shows the present invention and the screw main body used conventionally. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 本発明の面粗度の粗し方法によるＰＣパウダ原料でのテストデータを示すデータ図である。It is a data figure which shows the test data in the PC powder raw material by the surface roughness roughening method of this invention.

符号の説明Explanation of symbols

１ スクリュ本体
３ 逆流防止リング
４ フィードゾーン
５ コンプレッションゾーン
６ メータリングゾーン
７ 溝部
８ 山部
９ 面粗度
１０ 移送面 DESCRIPTION OF SYMBOLS 1 Screw main body 3 Backflow prevention ring 4 Feed zone 5 Compression zone 6 Metering zone 7 Groove part 8 Crest part 9 Surface roughness 10 Transfer surface

Claims (6)

樹脂成形機に用いられフィードゾーン(4)、コンプレッションゾーン(5)及びメータリングゾーン(6)を有するスクリュ本体(1)の前記コンプレッションゾーン(5)及びメータリングゾーン(6)の溝部(7)の面粗度(9)をサンドブラスト法により予め粗して形成することにより、少なくとも前記溝部(7)に炭化膜による断熱層を形成し、成形される樹脂成形品の焼け、黄変又は黒点の形成を防止することを特徴とする樹脂成形加工方法。   The groove (7) of the compression zone (5) and metering zone (6) of the screw body (1) having a feed zone (4), compression zone (5) and metering zone (6) used in a resin molding machine. By forming the surface roughness (9) in advance by sandblasting, a heat insulating layer made of a carbonized film is formed at least in the groove (7), and the molded resin molded product is burnt, yellowed or blackened. A resin molding method characterized by preventing formation. 前記面粗度(9)の粗さを、算術表面粗さで１．５〜２．５Ｒａにすることを特徴とする請求項１記載の樹脂成形加工方法。   2. The resin molding method according to claim 1, wherein the roughness of the surface roughness (9) is 1.5 to 2.5 Ra in terms of arithmetic surface roughness. 前記溝部の表面には、少なくとも硬質クロームメッキ、ＴｉＣ、ＴｉＮの表面コーティングの何れかからなるコーティング面が形成され、前記コーティング面は前記サンドブラスト法によって予め粗されていることを特徴とする請求項１又は２記載の樹脂成形加工方法。   2. The surface of the groove is formed with a coating surface made of at least one of hard chrome plating, TiC, and TiN surface coating, and the coating surface is previously roughened by the sandblasting method. Or the resin molding processing method of 2. 樹脂成形機に用いられフィードゾーン(4)、コンプレッションゾーン(5)及びメータリングゾーン(6)を有するスクリュ本体(1)からなる樹脂成形加工用スクリュにおいて、
前記コンプレッションゾーン(5)及びメータリングゾーン(6)の溝部(7)の面粗度(9)は、サンドブラスト法によって予め粗して形成した構成よりなることを特徴とする樹脂成形加工用スクリュ。 In a resin molding processing screw used in a resin molding machine and comprising a screw body (1) having a feed zone (4), a compression zone (5) and a metering zone (6),
A screw for resin molding processing, characterized in that the surface roughness (9) of the groove (7) of the compression zone (5) and metering zone (6) is preliminarily formed by sandblasting. 前記面粗度(9)の粗さを、算術表面粗さで１．５〜２．５Ｒａに構成したことを特徴とする請求項４記載の樹脂成形加工用スクリュ。   5. The resin molding processing screw according to claim 4, wherein the roughness of the surface roughness (9) is 1.5 to 2.5 Ra in terms of arithmetic surface roughness. 前記溝部の表面には、少なくとも硬質クロームメッキ、ＴｉＣ、ＴｉＮの表面コーティングの何れかからなるコーティング面が形成され、前記コーティング面は前記サンドブラスト法によって予め粗されていることを特徴とする請求項４又は５記載の樹脂成形加工用スクリュ。   5. The surface of the groove is formed with a coating surface comprising at least one of hard chrome plating, TiC, and TiN surface coating, and the coating surface is roughened in advance by the sandblast method. Or the screw for resin molding processing of 5.
JP2004217408A 2004-07-26 2004-07-26 Resin molding method and resin molding screw Pending JP2006035582A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549541A (en) * 2008-04-04 2009-10-07 帝人化成株式会社 Forming method of aromatic panlite formed piece and formed piece
JP2020049790A (en) * 2018-09-27 2020-04-02 セイコーエプソン株式会社 Plasticizing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549541A (en) * 2008-04-04 2009-10-07 帝人化成株式会社 Forming method of aromatic panlite formed piece and formed piece
JP2020049790A (en) * 2018-09-27 2020-04-02 セイコーエプソン株式会社 Plasticizing apparatus
US11465347B2 (en) 2018-09-27 2022-10-11 Seiko Epson Corporation Plasticizing device
JP7180244B2 (en) 2018-09-27 2022-11-30 セイコーエプソン株式会社 Plasticizing device

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