JPS60173040A - Phenolic resin molding material - Google Patents
Phenolic resin molding materialInfo
- Publication number
- JPS60173040A JPS60173040A JP2856884A JP2856884A JPS60173040A JP S60173040 A JPS60173040 A JP S60173040A JP 2856884 A JP2856884 A JP 2856884A JP 2856884 A JP2856884 A JP 2856884A JP S60173040 A JPS60173040 A JP S60173040A
- Authority
- JP
- Japan
- Prior art keywords
- particle size
- phenolic resin
- particles
- molding material
- resin 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
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、粉末状のフェノール樹脂成形材料に関し、材
料の粒度を０．２５〜２．０胴で、分布を一定に揃える
ことによシ安定した連続射出成形が可能なことを特徴と
するフェノール樹脂成形材料に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a powdered phenolic resin molding material.The present invention relates to a powdered phenolic resin molding material. The present invention relates to a phenolic resin molding material that can be continuously injection molded.
従来技術
従来、粉砕機で破砕した粉末状成形材料では、材料のロ
フト内、ロット間での粒度分布が２ｔｒａｎ以上で５〜
３０％、０．２５ｍ以下が０〜２０％とバラツキ、特傾
微粉末の影響で粒子の分級を生じ連続射出成形に於いて
、１シヨツト毎の計量安定性に欠けるため、成形した成
形品が充填不足やパリ発生のバラツキを生じ成形管理、
自動成形が難しい。又、材料を押出機により粒径３１〜
３４咽で８０〜９５チと一定形状に造粒化することで、
よシ計量を安定化する方法があるが、粒径が大きすぎる
ため見掛は密度が小さく、成形時、シリンダーにチャー
ジする際、計量時間が長くなる欠点があシ、ハイサイク
ル化ができない欠点があった。Conventional technology Conventionally, in powdered molding materials crushed by a crusher, the particle size distribution within the loft of the material and between lots is 2tran or more.
30%, 0 to 20% for 0.25m or less, and particles are classified due to the influence of the special gradient fine powder.In continuous injection molding, there is a lack of measurement stability for each shot, so the molded product is Molding management due to insufficient filling and uneven occurrence of paris,
Automatic molding is difficult. In addition, the material is processed by an extruder to a particle size of 31~
By granulating it into a fixed shape of 80 to 95 pieces in 34 pieces,
There is a method to stabilize metering, but the particle size is too large, so the apparent density is low, and the disadvantage is that it takes a long time to measure when charging the cylinder during molding, and it is not possible to achieve high cycles. was there.
粒度を小さくすれば多少チャージ性がアップするが押出
機での生産性が著しく劣シ、２咽以下の造粒品は工業的
に生産されておらず十分な結果が得られなかった。If the particle size is made smaller, the chargeability will be improved to some extent, but the productivity in the extruder is extremely poor, and granulated products with a size of 2 or less are not produced industrially, so that satisfactory results could not be obtained.
発明の目的
本発明は、これらの欠点を解決するため検討したもので
、破砕粉末材料の粒度を０．２５〜２０澗に整粒化する
ことによシ、ロット内あるいはロットが変わっても見掛
は密度が一定であシ、計量安定性が良く、連続射出成形
でのバラツキが少なくなるため成形管理が容易となり、
自動成形を可能にすることを特徴とするフェノール樹脂
成形材料を提供することを目的とする。Purpose of the Invention The present invention was developed in order to solve these drawbacks, and by sizing the particle size of the crushed powder material to 0.25 to 20 mm, it is possible to improve the consistency within a lot or even when the lot changes. Kake has a constant density, has good measurement stability, and reduces variations in continuous injection molding, making molding management easier.
The object of the present invention is to provide a phenolic resin molding material that enables automatic molding.
発明の構成
本発明は、成形材料の粒度中が粒径０．２５〜１０簡の
範囲で２５〜５５％、１．０〜２． Ｏｒｒｒｍが４５
〜７５チ、０２５ｗｎ以下及び２． Ｏｒｒｒｊｎ以上
が３％以下好ましくは０％となることを特徴とするフェ
ノール樹脂成形材料である。Structure of the Invention The present invention is characterized in that the particle size of the molding material is 25 to 55%, 1.0 to 2. Orrrm is 45
~75chi, 025wn or less and 2. This is a phenolic resin molding material characterized in that the content of 0% or more is 3% or less, preferably 0%.
本発明を実施するには、材料を製造する際に、熱ロール
等で溶融混練し、冷却したシートを破砕粉砕後、篩分機
によシ篩分を行ない粒度調整し、成形材料を得る。特に
材料粒度が０．２５〜２．０ ｍの巾に調整した場合に
著しく計量安定性が良くなる結果を得た。ここで述べる
粒度とはＪＩＳ ２８８０１で規格されている篩で篩分
けをしたものを言う。To carry out the present invention, when producing the material, the material is melt-kneaded using hot rolls or the like, and the cooled sheet is crushed and crushed, and then sieved by a sieve machine to adjust the particle size to obtain a molding material. In particular, when the particle size of the material was adjusted to a width of 0.25 to 2.0 m, the measurement stability was significantly improved. The particle size mentioned here refers to the particle size obtained by sieving using a sieve specified in JIS 28801.
本発明では篩分によυ２． Ｏｒｒｒｍ以上及び０．２
５ ｔｔｒｍ以下の粒子をカットし粒度分布中を０２５
〜１．０咽を２５〜５５チ、１．０〜２．０祁を４５〜
７５％で一定に揃えることにより得た材料で射出成形を
行ったところ計量が安定し連続成形時のバラツキが少な
くなることを見出した。In the present invention, υ2. Orrrm or more and 0.2
Cut particles smaller than 5 ttrm and reduce particle size distribution to 025
~1.0 pharynx 25~55 chi, 1.0~2.0 qi 45~
When injection molding was performed using the material obtained by keeping the ratio constant at 75%, it was found that the measurement was stable and variations during continuous molding were reduced.
この時０．２５ｗｎ以下の微粒子が含まれると、運搬中
や成形時ホッパー内で粗粉と微粉とが分離し、粒子の分
級を生じ見掛は密度が変化し、計量安定性に欠は安定し
た成形品が得られにくい。At this time, if fine particles of 0.25wn or less are included, coarse powder and fine powder will separate during transportation or in the hopper during molding, causing particle classification and apparent density changes, resulting in poor measurement stability. It is difficult to obtain a molded product with a high temperature.
材料粒度が２．０〜４．０■の粗粉とした場合、計量時
間が長く、且つ、シリンダー内での溶融性が悪くなシハ
イサイクル成形ができなかった。When the material particle size was coarse powder with a particle size of 2.0 to 4.0 square meters, high cycle molding was not possible due to the long measuring time and poor meltability in the cylinder.
シリンダー内での溶融性は、０．２５ｍｍ以下の場合、
非常に良いが、計量安定性から粒度中を０．２５〜１．
０ ｓｎが２５〜５５％、１．０〜２．０閣を４５〜７
５％にすることで問題ない。If the meltability in the cylinder is 0.25 mm or less,
Very good, but the particle size should be between 0.25 and 1.0 for measurement stability.
0 sn is 25-55%, 1.0-2.0 is 45-7
There is no problem with setting it to 5%.
次に本発明を実施するに当って詳しく説明する。Next, the implementation of the present invention will be explained in detail.
フェノール樹脂としては、ノボラック型あるいはレゾー
ル型フェノール樹脂として一般に使用されているものに
充填材、硬化剤、顔料とを配合し、熱ロール押出機等で
溶融混練した後、冷却したシートをハンマーミル等で破
砕粉砕後、（スクリーンあるいは空気等による）篩分方
法によシ粒度を０．２５〜１． Ｏｔｒａｎを２５〜５
５％、１．０〜２０咽を４５〜７５％になるように整粒
化してフェノール樹脂成形材料全調整する。０．２５
ｒｒｎｎ以下の微粉が多い場合にはシリンダーやスクリ
ューにすぐ溶融付着するためチャージ性のバラツキの原
因となり又ホッパー内でも粗い粒子とすぐ分離するため
分−が生じ、連続成形時にショット毎に重量・クラツキ
を生じる。又２． Ｏｗ以上では、計量性が向上するが
、チャージ性が遅くる。チャージ性は容量秤量になるた
め、粒子が犬の場合１個でもチャージを大きく変化させ
るために好ましくない。As the phenolic resin, fillers, curing agents, and pigments are blended with commonly used novolac-type or resol-type phenolic resins, and the mixture is melt-kneaded using a hot roll extruder or the like, and then the cooled sheet is processed using a hammer mill or other similar machine. After crushing and crushing, the particle size is reduced to 0.25-1. Otran 25~5
The phenol resin molding material is completely adjusted by sizing the 5% and 1.0 to 20% particles to 45 to 75%. 0.25
If there is a large amount of fine powder below rrnn, it will melt and adhere to cylinders and screws quickly, causing variations in charging performance.Also, it will quickly separate from coarse particles in the hopper, resulting in a difference in weight and fluctuation for each shot during continuous molding. occurs. Also 2. If the temperature is Ow or more, the metering performance is improved, but the charging performance is slow. Since chargeability is determined by capacity measurement, even one particle of dog particles is not preferable because it causes a large change in charge.
上記のようにして得られたフェノール樹脂成形材料は、
射出成形によシ成形品を成形されるもので計量安定性に
優れ連続成形時の成形品重量のバラツキを著しく少なく
できた。The phenolic resin molding material obtained as above is
The molded product is molded by injection molding, and has excellent measurement stability, making it possible to significantly reduce the variation in weight of molded products during continuous molding.
発明の効果
本発明方法に従うと従来、連続射出成形において成形品
重量がバラツキ、充填不足あるいはパリ発生のバラツキ
を生じ、発生したパリを取り除く作業を手作業で行りて
いたのに対し、成形品重量が安定化するため、このよう
な問題が解決され、成形の自動化が可能になる利点があ
る。Effects of the Invention According to the method of the present invention, in conventional continuous injection molding, variations in the weight of molded products, insufficient filling, or variations in the occurrence of burrs occurred, and the work to remove the generated burrs was done manually. Since the weight is stabilized, this problem is solved and molding can be automated.
実施例 以下本発明を実施例、比較例により説明する。Example The present invention will be explained below with reference to Examples and Comparative Examples.
（部は重量部である）ノボラック型フェノール樹脂（軟
化点８５℃）４５部、ヘキサメチレンテトラミン５部、
木粉（８０メツシユパス）４０部、炭酸カルシウム８部
、ステアリン酸１部、顔料１部の配合で熱ロールによシ
溶融混練し、冷却したシートをハンマーミルで粉砕後振
動ふるいによシ第１表のように整粒化してフェノール樹
脂成形材料を得た。(Parts are parts by weight) 45 parts of novolac type phenol resin (softening point 85°C), 5 parts of hexamethylenetetramine,
A mixture of 40 parts of wood flour (80 mesh pass), 8 parts of calcium carbonate, 1 part of stearic acid, and 1 part of pigment was melted and kneaded using a hot roll, and the cooled sheet was crushed using a hammer mill and passed through a vibrating sieve. The particles were sized as shown in the table to obtain a phenolic resin molding material.
上記のようにして得た材料をブレーカ−２ケ取シの射出
成形によシ、連続１００シヨツトの成形を行ったところ
比較例１〜３に比べ実施例１．２はいずれも重量バラツ
キが非常に少なく、且つ比較例に比ベチャージ時間が短
かく著しく効果が確認された。The material obtained in the above manner was subjected to injection molding using a breaker with two cavities, and 100 consecutive shots were molded. Compared to Comparative Examples 1 to 3, Examples 1 and 2 showed a large variation in weight. The charging time was shorter than that of the comparative example, and a remarkable effect was confirmed.
Claims (1)
囲で２５〜５５チ、１．０〜２．０ ｍｍが４５〜７５
チ、０、２５ ｍｍ以下及び２． Ｏｒａｎ以上が３チ
以下となることを特徴とするフェノール樹脂成形材料。The particle size of the molding material is 0.25 to 1. Orin range is 25 to 55 inches, 1.0 to 2.0 mm is 45 to 75
H, 0, 25 mm or less, and 2. A phenolic resin molding material characterized in that Oran or more is 3 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2856884A JPS60173040A (en) | 1984-02-20 | 1984-02-20 | Phenolic resin molding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2856884A JPS60173040A (en) | 1984-02-20 | 1984-02-20 | Phenolic resin molding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60173040A true JPS60173040A (en) | 1985-09-06 |
| JPH0432864B2 JPH0432864B2 (en) | 1992-06-01 |
Family
ID=12252231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2856884A Granted JPS60173040A (en) | 1984-02-20 | 1984-02-20 | Phenolic resin molding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60173040A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5394528A (en) * | 1977-01-31 | 1978-08-18 | Matsushita Electric Works Ltd | Phenolic resin molding material and method of molding the same |
| JPS5924739A (en) * | 1982-08-02 | 1984-02-08 | Matsushita Electric Works Ltd | Phenolic molding material |
-
1984
- 1984-02-20 JP JP2856884A patent/JPS60173040A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5394528A (en) * | 1977-01-31 | 1978-08-18 | Matsushita Electric Works Ltd | Phenolic resin molding material and method of molding the same |
| JPS5924739A (en) * | 1982-08-02 | 1984-02-08 | Matsushita Electric Works Ltd | Phenolic molding material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0432864B2 (en) | 1992-06-01 |
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