金型材料の選択は、金型の設計と製造において重要な問題です。, 金型の製造工程に直接影響します, 金型の耐用年数, プラスチック部品の成形品質と金型の加工コスト.
このため, 国内外の学者は、優れた性能を持つ新しい金型鋼を開発しました, 加工性能と熱処理変形, プリハードン鋼など, 新焼入れ焼戻し鋼、マルエージング鋼.
加えて, in order to improve the lifetime of the mold, many research and engineering practices have been done on the surface strengthening treatment of the molded parts, and good results have been achieved.
So far, the above research and development work has been continuously carried out in depth, and the results achieved have been vigorously promoted.
The working conditions of plastic molds generally have to work at 150~200 °C, in addition to the pressure, there is also the effect of temperature.
According to the different conditions and processing methods of plastic molding dies, the basic performance requirements of steel for plastic molds are roughly summarized as follows:
(1) Sufficient surface hardness and wear resistance
The hardness of the plastic mold is usually below 50~60 HRC, and the heat-treated mold should have sufficient surface hardness to ensure the mold has sufficient rigidity.
In the work, the mold is subjected to large compressive stress and friction due to the filling and flowing of the plastic. The mold is required to maintain the accuracy of the shape and the stability of the dimensional accuracy to ensure the mold has a sufficient service life.
金型の耐摩耗性は、鋼の化学組成と熱処理硬度に依存します, so increasing the hardness of the mold is beneficial to improve its wear resistance.
(2) 良好な機械加工性
Use steel grades that are easy to cut and that provide high-precision parts after machining.
このために, medium carbon steel and medium carbon alloy steel are most commonly used, which is especially important for large molds.
For parts requiring EDM, the burn hardened layer of the steel is also required to be thin.
(3) 優れた研磨性能
High-quality plastic products require a small roughness value on the surface of the cavity.
したがって、, the working surface of the injection molded part needs to be polished to the mirror surface, Ra≤0.05μm, the hardness of the steel is required to be 35~40 HRC, and the surface is too hard, which makes the polishing difficult.
このために, the selected steel requires less material impurities, the microstructure should be uniform and dense, and there is no fiber directionality. There should be no pitting or orange peel defects during polishing.
(4) 良好な熱安定性
The shape of the parts of the plastic injection mold is often complicated, 焼入れ後の加工が難しい. したがって、, materials with good thermal stability should be selected as much as possible, so that the linear expansion coefficient of the molded parts after heat treatment is small, 熱処理変形が小さい, and the dimensional change caused by the temperature difference
The rate is small, 金属組織と金型サイズが安定している, which can be reduced or no longer processed, thus ensuring the dimensional accuracy and surface roughness requirements of the mold.
(5) Good wear resistance and fatigue resistance
The injection molded cavity is not only washed by the high pressure plastic melt, but also by the temperature stress of the alternating heat and cold.
The general high carbon alloy steel can be heat treated to obtain high hardness, but the toughness is poor, and it is easy to form surface cracks, which is not suitable.
The selected steel grade should enable the injection mold to reduce the number of times of polishing and repair, and maintain the dimensional accuracy of the cavity for a long time, achieving the service life of mass production.
(6) 耐食性
For some plastic types, such as polyvinyl chloride and flame retardant plastics, steel grades with corrosion resistance must be considered.
加えて, when selecting materials, it is necessary to consider preventing scratches and gluing. If there is relative motion between the two surfaces, try to avoid selecting materials with the same structure. In special cases, one side may be plated or nitride to make the two sides different surface structure.
JasonMould Industrial CompanyLimitedについて
ジェイソンモールドは 中国の金型メーカー プラスチック金型の- 射出成形金型, ダイカスト金型, プラスチックブロー成形, 回転成形, 医療 プラスチック射出成形, ツーショット プラスチック射出成形, インサート成形, オーバーモールド, 金属射出成形, マイクロ射出成形, 粉末射出成形, セラミック射出成形, 液体射出成形, ハスキーインジェクションモールディング, 家庭用カビ, 鋳造金型, ダイモールドツール, カスタムモールド, 中国のカビ, ラピッドプロトタイピングツール, プラスチックプロトタイピングツーリング, パンチプレス工具, 携帯電話/携帯電話部品用の金型と工具, 自動車部品, 掃除機, 充電式ツール, 電話, コピー機, コンピューター, マルチメディアスピーカー, および他の多くの電子製品および家電製品. また、プラスチック製品メーカー, 金型メーカー中国- プラスチックの部品, プラスチック製の水タンク, プラスチックボール, プラスチック容器, プラスチックバックル, プラスチックアンカー, プラスチックハンガー, プラスチックスプーン, プラスチックパイプフィッティング, プラスチックタンブル, プラスチック製食器, プラスチックのコップ, ペットボトル, プラスチックトレイ, プラスチック化粧品容器, プラスチックケース, プラスチック製の食品容器, プラスチック製の椅子, プラスチックキャップ, プラスチックキャップクロージャー, プラスチックチューブ, プラスチック製の水道管, プラスチック製のノブ, プラスチックチューブ, プラスチック製ユーティリティボックス, プラスチックラックなど.
連絡先:
人: ジェームズ・ユアン
会社: JasonMould Industrial Company Limited
追加: 竜崗村,Long西町,博羅県,恵州市,広東省, 中国
電話: 86-752-6682869
Eメール: [email protected]
