CN107986769B - 一种石英坩埚模具的制备方法 - Google Patents

一种石英坩埚模具的制备方法 Download PDF

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CN107986769B
CN107986769B CN201711337946.7A CN201711337946A CN107986769B CN 107986769 B CN107986769 B CN 107986769B CN 201711337946 A CN201711337946 A CN 201711337946A CN 107986769 B CN107986769 B CN 107986769B
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CN107986769A (zh
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刘浩
张君
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Suzhou Haoyan Precision Mould Co ltd
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Abstract

本发明公开了一种石英坩埚模具的制备方法，具体包括以下步骤：（1）将原料成分分别研磨，按比例混合搅拌；（2）注入模具中，并加入填料；（3）在真空干燥箱内进行干燥，真空度为0.08‑0.09MPa，干燥温度为50‑55℃，时间为2‑4h；（4）放入加热炉分段加热，具体温度为：200‑260℃、350‑420℃、550‑620℃；（5）喷涂填料；（6）在烧结炉中进行烧结，整个烧结流程工艺时间为24‑26h，温度为1100‑1220℃；本发明具有高强度、良好的耐磨性和耐高温性，延长了使用寿命。

Description

一种石英坩埚模具的制备方法
技术领域
本发明涉及一种石英坩埚模具的制备方法。
背景技术
模具是工业生产上用以吹塑、注塑、挤出或锻压成型、冶炼等方法得到所需产品的各种模子和工具，随着光伏市场的爆发式增长，坩埚的需求量也日益增大，同时坩埚的尺寸也越来越大，而坩埚的制造需要用到模具，但是传统的坩埚模具的埚体结构复杂，不耐高温、且强度差，容易损坏。
发明内容
本发明的目的在于提供一种石英坩埚模具的制备方法。
本发明为了实现上述目的，提供技术方案是：一种石英坩埚模具的制备方法，具体包括以下步骤：
步骤一：将纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂分别送至球磨机中，采用湿法球磨，球磨时间为3-4h，分别过筛70目和90目；
步骤二：将填料送至球磨机中，采用干法球磨，球磨时间为2-3h，该填料与纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂重量配比为1：9：7；
步骤三：将过筛后不同粒径的纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂按照上述配比加入到混料筒中，以600-650r/min的转速搅拌3-4h，使其混合均匀；
步骤四：将混合均匀后浆料陈化4-6天，然后将球磨后填料中三分之一加入到混料桶中，以300-360r/min的转速搅拌4-5h，确保浆料混合均匀；
步骤五：然后将上述混合均匀的浆料注入成型模具中，并且注入过程中加入三分之一的填料，其中成型模具由上模框、下模框和模芯三部分组成，模芯设置在整个石膏模具中心内，呈圆柱形结构，且模芯内部为中空结构，通过浆料注入口将浆料注入到模框与模芯的间距中以及模芯内部的空腔内，分三次注入，每次注入浆料后加入填料，然后继续注入浆料，其中填料分两次加入，整体注入时间为1-2min，浆料注入完毕后接着将经过浸渍处理后的带有气孔的发泡材料铺在上模框顶部，将浆料中的水分吸收干净；
步骤六：将步骤五整个成型模具送至真空干燥箱内进行干燥，真空度为0.08-0.09MPa，干燥温度为50-55℃，时间为2-4h，
步骤七：将成型模具脱除，得到石英模具毛坯，将毛坯送至加热炉中进行分段加入，具体温度为：200-260℃、350-420℃、550-620℃，加热结束后冷却至室温；
步骤八：在毛坯内部表面涂覆粘结剂，然后将剩下的三分之一的填料喷涂在石英模具内部表面，喷淋流量为50-70ml/10s；
步骤九：将毛坯放入烧结炉中进行烧结，整个烧结流程工艺时间为24-26h，温度为1100-1220℃，得到石英模具。
本发明进一步限定的技术方案是：
前述的填料按质量份数计包括以下组分：氧化锆：8-12份、碳酸钙：10-15份、氧化镁： 4-8份、碳化硅微粉：22-26份、膨润土：13-17份、高岭土：10-14份、方解石粉：7-11 份、硫酸钡：5-7份、铝粉：3-5份、镍粉1-2份。
前述的步骤六中真空度为0.08MPa，干燥温度为53℃，时间为3h。
前述的步骤七中分段加热具体温度为：230℃、400℃、600℃。
前述的步骤九中整个烧结流程工艺时间为24h，温度为1150℃。
本发明的有益效果是：本发明采用纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂制成，具有良好的耐高温性，在高温使用过程中，热膨胀系数小，耐腐蚀，具有优良的化学稳定性，加入填料能够提高其强度、耐磨性和耐腐蚀性，延长使用寿命；
本发明通过成型模具的浇筑直接得到模具，简化了上产工序，降低了了时间，浇注时间控制在1-2min，避免浆料和空气接触时间长，影响坩埚强度，容易造成内裂纹缺陷，放入真空干燥箱中干燥，并控制干燥时间和温度，提高其强度，放在加热炉中进行分段加热，能够去除内部的一些杂质，提高其质量，在模具的内外表面喷涂填料，能够提高其耐磨性能，放入烧结炉中进行烧结，控制时间和温度能够进一步提高模具强度，同时能够加热填料,使表面粘结更加致密。
具体实施方式
实施例1
本实施例提供一种石英坩埚模具的制备方法，具体包括以下步骤：
步骤一：将纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂分别送至球磨机中，采用湿法球磨，球磨时间为3.5h，分别过筛70目和90目；
步骤二：将填料送至球磨机中，采用干法球磨，球磨时间为2.5h，该填料与纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂重量配比为1：9:7，且填料按质量份数计包括以下组分：氧化锆：9份、碳酸钙：10份、氧化镁：4份、碳化硅微粉：22份、膨润土：13份、高岭土：10份、方解石粉：7份、硫酸钡：5份、铝粉：3份、镍粉1份；
步骤三：将过筛后不同粒径的纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂按照上述配比加入到混料筒中，以630r/min的转速搅拌3.5h，使其混合均匀；
步骤四：将混合均匀后浆料陈化5天，然后将球磨后填料中三分之一加入到混料桶中，以300r/min的转速搅拌5h，确保浆料混合均匀；
步骤五：然后将上述混合均匀的浆料注入成型模具中，并且注入过程中加入三分之一的填料，其中成型模具由上模框、下模框和模芯三部分组成，模芯设置在整个石膏模具中心内，呈圆柱形结构，且模芯内部为中空结构，通过浆料注入口将浆料注入到模框与模芯的间距中以及模芯内部的空腔内，分三次注入，每次注入浆料后加入填料，然后继续注入浆料，其中填料分两次加入，整体注入时间为1.5min，浆料注入完毕后接着将经过浸渍处理后的带有气孔的发泡材料铺在上模框顶部，将浆料中的水分吸收干净；
步骤六：将步骤五整个成型模具送至真空干燥箱内进行干燥，真空度为0.08MPa，干燥温度为53℃，时间为3h；
步骤七：将成型模具脱除，得到石英模具毛坯，将毛坯送至加热炉中进行分段加入，具体温度为：230℃、400℃、600℃，加热结束后冷却至室温；
步骤八：在毛坯内部表面涂覆粘结剂，然后将剩下的三分之一的填料喷涂在石英模具内部表面，喷淋流量为60ml/10s；
步骤九：将毛坯放入烧结炉中进行烧结，整个烧结流程工艺时间为24h，温度为1150 ℃，得到石英模具。
实施例2
本实施例提供一种石英坩埚模具的制备方法，具体包括以下步骤：
步骤一：将纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂分别送至球磨机中，采用湿法球磨，球磨时间为4h，分别过筛70目和90目；
步骤二：将填料送至球磨机中，采用干法球磨，球磨时间为3h，该填料与纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂重量配比为1：9:7，且填料按质量份数计包括以下组分：氧化锆：11份、碳酸钙：13份、氧化镁：5份、碳化硅微粉：24份、膨润土：14份、高岭土：12份、方解石粉：8份、硫酸钡：6份、铝粉：4份、镍粉2份；
步骤三：将过筛后不同粒径的纯度为99.99％熔融石英砂和纯度为99.995％熔融石英砂按照上述配比加入到混料筒中，以650r/min的转速搅拌3h，使其混合均匀；
步骤四：将混合均匀后浆料陈化6天，然后将球磨后填料中三分之一加入到混料桶中，以360r/min的转速搅拌4h，确保浆料混合均匀；
步骤五：然后将上述混合均匀的浆料注入成型模具中，并且注入过程中加入三分之一的填料，其中成型模具由上模框、下模框和模芯三部分组成，模芯设置在整个石膏模具中心内，呈圆柱形结构，且模芯内部为中空结构，通过浆料注入口将浆料注入到模框与模芯的间距中以及模芯内部的空腔内，分三次注入，每次注入浆料后加入填料，然后继续注入浆料，其中填料分两次加入，整体注入时间为2min，浆料注入完毕后接着将经过浸渍处理后的带有气孔的发泡材料铺在上模框顶部，将浆料中的水分吸收干净；
步骤六：将步骤五整个成型模具送至真空干燥箱内进行干燥，真空度为0.085MPa，干燥温度为55℃，时间为2h，
步骤七：将成型模具脱除，得到石英模具毛坯，将毛坯送至加热炉中进行分段加入，具体温度为：240℃、420℃、610℃，加热结束后冷却至室温；
步骤八：在毛坯内部表面涂覆粘结剂，然后将剩下的三分之一的填料喷涂在石英模具内部表面，喷淋流量为65ml/10s；
步骤九：将毛坯放入烧结炉中进行烧结，整个烧结流程工艺时间为25h，温度为1180 ℃，得到石英模具。
除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本发明要求的保护范围。

Claims (4)

1.一种石英坩埚模具的制备方法，其特征在于：具体包括以下步骤：
步骤一：将纯度为99.99%熔融石英砂和纯度为99.995%熔融石英砂分别送至球磨机中，采用湿法球磨，球磨时间为3-4h，分别过筛70目和90目；
步骤二：将填料送至球磨机中，采用干法球磨，球磨时间为2-3h，该填料与纯度为99.99%熔融石英砂和纯度为99.995%熔融石英砂重量配比为1:9:7，其中填料按质量份数计包括以下组分：氧化锆：8-12份、碳酸钙：10-15份、氧化镁：4-8份、碳化硅微粉：22-26份、膨润土：13-17份、高岭土：10-14份、方解石粉：7-11份、硫酸钡：5-7份、铝粉：3-5份、镍粉1-2份；
步骤三：将过筛后不同粒径的纯度为99.99%的熔融石英砂和纯度为99.995%的熔融石英砂按照上述配比加入到混料筒中，以600-650r/min的转速搅拌3-4h，使其混合均匀；
步骤四：将混合均匀后浆料陈化4-6天，然后将球磨后所得填料的三分之一加入到混料桶中，以300-360r/min的转速搅拌4-5h，确保浆料混合均匀；
步骤五：然后将上述混合均匀的浆料注入成型模具中，并且注入过程中加入三分之一的填料，其中成型模具由上模框、下模框和模芯三部分组成，模芯设置在整个石膏模具中心内，呈圆柱形结构，且模芯内部为中空结构，通过浆料注入口将浆料注入到模框与模芯的间距中以及模芯内部的空腔内，分三次注入，每次注入浆料后加入填料，然后继续注入浆料，其中填料分两次加入，整体注入时间为1-2min，浆料注入完毕后接着将经过浸渍处理后的带有气孔的发泡材料铺在上模框顶部，将浆料中的水分吸收干净；
步骤六：将步骤五整个成型模具送至真空干燥箱内进行干燥，真空度为0.08-0.09MPa，干燥温度为50-55℃，时间为2-4h，
步骤七：将成型模具脱除，得到石英模具毛坯，将毛坯送至加热炉中进行分段加热，具体温度为：200-260℃、350-420℃、550-620℃，加热结束后冷却至室温；
步骤八：在毛坯内部表面涂覆粘结剂，然后将剩下的三分之一的填料喷涂在石英模具内部表面，喷淋流量为50-70ml/10s；
步骤九：将毛坯放入烧结炉中进行烧结，整个烧结流程工艺时间为24-26h，温度为1100-1220℃，得到石英模具。
2.根据权利要求1所述的石英坩埚模具的制备方法，其特征在于：所述步骤六中真空度为0.08MPa，干燥温度为53℃，时间为3h。
3.根据权利要求1所述的石英坩埚模具的制备方法，其特征在于：所述步骤七中分段加热具体温度为：230℃、400℃、600℃。
4.根据权利要求1所述的石英坩埚模具的制备方法，其特征在于：所述步骤九中整个烧结流程工艺时间为24h，温度为1150℃。
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