金型に最適な材料はどれですか?

PMMAはドライホッパーに保管する必要があります もう1つは、材料の加熱プロセス中に発生するさまざまなガスを除去することです。 meets the requirements of working conditions

1. 耐摩耗性

When the blank is plastically deformed in the 排気スロットの幅は、ランナーの幅と同じである必要があります, キャビティの表面に沿って流れて滑ります, キャビティの表面とブランクの間に激しい摩擦が生じる, 磨耗により金型が破損する原因となります. したがって, the wear resistance of the material is one of the most basic and important properties of the mold.

Hardness is the main factor affecting wear resistance. 一般に, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. 加えて, wear resistance is also related to the type, quantity, 形, size and distribution of carbides in the material.

2. Strength

The working conditions of the molds are mostly very bad, and some of them are often subjected to large impact loads, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during work, the mold must have high strength and toughness.

The toughness of the mold mainly depends on the carbon content, grain size and organization state of the material.

3. Fatigue fracture performance

In the process of mold work, under the long-term action of cyclic stress, fatigue fracture is often caused. Its forms include low-energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture, and bending fatigue fracture.

The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material.

4. High temperature performance

When the working temperature of the mold is higher, the hardness and strength will decrease, leading to early wear of the mold or plastic deformation and failure. Because the mold material should have high anti-tempering stability, to ensure that the mold has a high hardness and strength at the working temperature.

5. Resistance to cold and heat fatigue

Some molds are in a state of repeated heating and cooling during the working process, which causes the surface of the cavity to be pulled and pressure to change the stress, causing surface cracks and peeling, increasing friction, hindering plastic deformation, and reducing dimensional accuracy. Mold failure. Heat and cold fatigue is one of the main forms of failure of hot work molds, and this type of mold should have high resistance to cold and heat fatigue.

6. Corrosion resistance

When some molds such as plastic molds are working, due to the presence of chlorine, fluorine and other elements in the plastics, strong corrosive gases such as hci and hf will be resolved after being heated, which will erode the surface of the mold cavity, increase its surface roughness, and aggravate wear failure.

2番、the mold meets the process performance requirements

金型の製造には通常、鍛造などのいくつかの工程が含まれます。, 切断, そして熱処理. 金型製作の品質を確保し、生産コストを削減するため, 材料は良好な鍛造性を持っている必要があります, 被削性, 焼入性, 焼入性と研削性; it should also have small oxidation, decarburization sensitivity and quenching Deformation and cracking tendency.

1. 鍛造性

熱間鍛造変形抵抗が低い, 良好な可塑性, 広い鍛造温度範囲, low tendency of forging cracking and cold cracking and precipitation of network carbides.

2. 焼鈍加工性

球状化焼鈍温度範囲が広い, 焼きなまし硬度が低い, 変動幅が小さい, 球状化率が高い.

3. 被削性

The cutting amount is large, the tool loss is low, and the machined surface roughness is low.

4. 酸化と脱炭に対する敏感さ

高温で加熱すると, 耐酸化性は良好です, 脱炭速度が遅い, it is not sensitive to the heating medium, and the tendency of pitting is small.

5. 焼入れ性

消光後, 均一で高い表面硬度を持っています.

6. 焼入れ性

消光後, より深い硬化層が得られます, 穏やかな焼入れ媒体を使用して硬化できます。.

7. 焼入変形、割れの発生傾向

従来の焼入れでは体積変化が小さい, shape warping, slight distortion, 異常変形しにくい. Conventional quenching has low sensitivity to cracking, and is insensitive to quenching temperature and workpiece shape.

8. 研削性

The relative wear of the grinding wheel is small, and the limit of grinding without burn is large. 砥石の品質や冷却条件の影響を受けません。, and it is not easy to cause abrasion and grinding cracks.

三番目, the mold meets the economic requirements

When selecting 材料 for the もう1つは、材料の加熱プロセス中に発生するさまざまなガスを除去することです。, the principle of economy must be considered to reduce the manufacturing cost as much as possible. したがって, under the premise of satisfying the performance, first choose the lower price, carbon steel can be used without alloy steel, and domestic materials can be used without imported materials. 加えて, the production and supply of the market should also be considered when selecting materials. The selected steel grades should be as few and concentrated as possible .

The injection molding process conditions have an impact on the appearance and mechanical properties of plastic products. Each process condition parameter affects each other and is not independent. The defects of some products are the result of mutual influence.

ご不明な点がございましたら プラスチック産業,plzはお気軽にお問い合わせください フリッシュチーム,私たちはあなたに最高のサービスを提供します！

Whatsapp / Wechat 008618958305290