国产精品亚洲一区二区三区在线|久久人妻中文字幕乱码|免费一级韩国无码婬片aa在线看|国产一区二区无码中文

    1. <tbody id="yvnyl"><div id="yvnyl"></div></tbody>

      <track id="yvnyl"></track>
    2. <track id="yvnyl"></track>
    3. <track id="yvnyl"><div id="yvnyl"></div></track>
    4. <bdo id="yvnyl"><optgroup id="yvnyl"><dd id="yvnyl"></dd></optgroup></bdo>

      <tbody id="yvnyl"><div id="yvnyl"></div></tbody>
      <menuitem id="yvnyl"><dfn id="yvnyl"><menu id="yvnyl"></menu></dfn></menuitem>

    5. <option id="yvnyl"></option><track id="yvnyl"><span id="yvnyl"></span></track>
      <bdo id="yvnyl"><dfn id="yvnyl"></dfn></bdo>

          <tbody id="yvnyl"><div id="yvnyl"></div></tbody>
            1. <tbody id="yvnyl"><div id="yvnyl"></div></tbody>

              <bdo id="yvnyl"></bdo>
              <menuitem id="yvnyl"><dfn id="yvnyl"></dfn></menuitem>

              您好,深圳市貝斯特精密技術有限公司歡迎您!

              中文版|English

              貝斯特精工

              貝斯特精工咨詢 Phone:

              0755-29750001

              您的當前位置:網站首頁 >新聞資訊 >公司新聞

              新聞資訊

              貝斯特精工金屬粉末注射成形基本工藝步驟

              time:2020-04-21Views:1221 Author:Best Seiko

              金屬粉末注射成形的基本工藝步驟是:首先是選取符合MIM要求的金屬粉末和粘結劑,然后在一 定溫度下采用適當的方法將粉末和粘結劑混合成均勻的喂料,經制粒后在注射成形,獲得的成形坯經過脫脂處理后燒結致密化成為終成品。

              1.MIM粉末及制粉技術

                MIM對原料粉末要求較高,粉末的選擇要有利于混煉、注射成形、脫脂和燒結,而這往往是相互矛盾的,對MIM原料粉末的研究包括:粉末形狀、粒度和粒度組成、比表面等,表1中列出了適合于MIM用的原料粉末的性質。

                由于MIM原料粉末要求很細,MIM原料粉末價格一般較高,有的甚至達 到傳統PM粉末價格的10倍,這是目前限制MIM技術廣泛應用的一個關鍵因素,目前生產MIM用原料粉末的方法主要有羰基法、超 高壓水霧化法、高壓氣體霧化法等。

              2.粘結劑 

                粘結劑是MIM技術的核 心,在MIM中粘結劑具有增強流動性以適合注射成型和維持坯塊形狀這兩個基本的職能,此外它還應具有易于脫除、無 毒性、成本合理等特點,為此出現了各種各樣的粘結劑,近年來正逐漸從單憑經驗選擇向根據對脫脂方法及對粘結劑功能的要求,有針對性地設計粘結劑體系的方向發展。

                粘結劑一般是由低分子組元與高分子組元加上一些要的添加劑構成。低分子組元粘度低,流動性好,易脫去;高分子組元粘度高,強度高,保持成形坯強度。二者適當比例搭配以獲得高的粉末裝載量,終得到高 精 度和高均勻性的產品。

              3.混煉 

                混煉是將金屬粉末與粘結劑混合得到均勻喂料的過程。由于喂料的性質決定了終注射成形產品的性能,所以混煉這一工藝步驟非 常重要。這牽涉到粘結劑和粉末加入的nents to make them melt, then cool, add low melting point components, and then add metal powder in batches. This prevents the low melting point components from vaporizing or decomposing, and adding metal powder in batches can prevent excessive torque increase and equipment loss. For the feeding method of powders of different sizes, the Japanese patent introduces: first add the coarser 15-40um water atomized powder to the binder, then add 5-15um powder, and then add the powder with degree ≤5um. The shrinkage of the final product changes little. In order to evenly coat a layer of binder around the powder, it is also possible to directly add the metal powder to the high melting point componenadictory. Research on MIM raw material powders includes: powder shape , Particle size and particle size composition, specific surface, etc., Table 1 lists the properties of the raw material powder suitable for MIM. Due to the very fine requirements of MIM raw material powders, the prices of MIM raw material powders are generally higher, and some even reach 10 times the price of traditional PM powders. This is currently a key factor restricting the widespread application of MIM technology. The current methods for producing MIM raw material powders are mainly There are carbonyl method, ultra high pressure water atomization method, high pressure gas atomization method, etc. 2. Binder Binder is the core of MIM technology. In MIM, the binder has two basic functions of enhancing fluidity to be suitable for injection molding and maintaining the shape of the billet. In addition, it should have easy removal and no Due to its toxicity and reasonable cost, a variety of adhesives have appeared for this purpose. In recent years, it has gradually moved from the selection of experience alone to the design of adhesives in accordance with the requirements of degreasing methods and the function of adhesives. The development of the agent system.   The binder is generally composed of low molecular components and high molecular components plus some essential additives. Low-molecular components have low viscosity, good fluidity and easy to take off; high-molecular components have high viscosity and high strength to maintain the strength of the formed blank. The two are matched in an appropriate ratio to obtain a high powder loading, and finally a product with high accuracy and uniformity is obtained. 3. Kneading     Kneading is the process of mixing metal powder and binder to obtain a uniform feed. Because the nature of the feed determines the performance of the final injection molded product, this process step of mixing is very important. This involves the addition of binders and powders

              新聞資訊
              contact us

              電話:0755-29750001

              郵箱:hwp@szbiest.com

              網址:www.mltdz.com

              地址:深圳市寶安區燕羅街道象山大道116號


              Scan the QR code
              版權所有:深圳市貝斯特精工科技有限公司|金屬粉末注射成型工廠,制造廠家,定制公司,供應商,工藝零件 粵ICP備18054342號 

              1. <tbody id="yvnyl"><div id="yvnyl"></div></tbody>

                <track id="yvnyl"></track>
              2. <track id="yvnyl"></track>
              3. <track id="yvnyl"><div id="yvnyl"></div></track>
              4. <bdo id="yvnyl"><optgroup id="yvnyl"><dd id="yvnyl"></dd></optgroup></bdo>

                <tbody id="yvnyl"><div id="yvnyl"></div></tbody>
                <menuitem id="yvnyl"><dfn id="yvnyl"><menu id="yvnyl"></menu></dfn></menuitem>

              5. <option id="yvnyl"></option><track id="yvnyl"><span id="yvnyl"></span></track>
                <bdo id="yvnyl"><dfn id="yvnyl"></dfn></bdo>

                    <tbody id="yvnyl"><div id="yvnyl"></div></tbody>
                      1. <tbody id="yvnyl"><div id="yvnyl"></div></tbody>

                        <bdo id="yvnyl"></bdo>
                        <menuitem id="yvnyl"><dfn id="yvnyl"></dfn></menuitem>