Co2 sand mold/Hope_ Copper alloy

標準

Hope_ Copper alloy, originally uploaded by Ahua.

The statue was casted in copper alloy.

經過一番勞力與心力, 加上時間的蘊釀,

終於把這座雕像casting 澆注銅合金(copper alloy)成型.

未經拋光處理的雕像,金屬的顏色及紋理,實在很美.

因為很重, 從學校抱回家時, 隨便靠在牆邊拍了這張照片,

81磅的重量,比家安跟比莉兩人加起來的重量還重.

經光線的投射,頭頂還出現光茫呢!

讓我想起台灣廟裡的神像, 被煙燻黑的臉.

沙模的製作過程:

製作方法跟Petribond sand mold making 大同小異.

材料不同, 混沙變會變硬,無法重複使用,可以製作大型的模子.

*Sodium silicate sand mold (CO2 mold making)

利用CO2 sand即矽酸鈉荃的模砂, 混合resin(樹脂)及 catalyst催化劑,

在很快的時間硬化模型。

模砂混合成分比例/Accoset formula for sand molding:

100 lb. Sand:5 lb. Resin: 12 oz. Catalyst

Add catalyst to sand, mull for1 1/2 minutes.

Add Sodium silicaate resin, mull for 3 minutes.

Build walls around pattern with cinder blocks

Coat image with Zip-Slip (parting agent)before make a sand mold.

Embed image halfway into packed Patrobond.

use motor mixer to mix Sodium silicate sand.

Add sand,resin and catalyst into mixer.

Then pour into the mold.

Fill up with catalyzed sodium silicate sand
into mold.

When hardened (overnight) turn mold and remove Petrobond.
Then fill up with catalyzed sodium silicate sand into mold for second part.

After mold hardened, open amd remove image.

There are few of undercuts. I have to break the patern and remove from mold.

無法保留原來的石膏板模, 不過它將要脫胎換骨了.

Cut gating.
Coat with core wash, seals parts of mold together.

After casting copper.

Break the mold, and degating.

Ps. 有些內容沒力也沒空再翻成中文.Sorry!

參考資料:現代鑄造法 

 

 

 

4 responses »

  1. 很自然的我就把他塑造成中國的女像.
    形容補天的女渦娘娘很恰當,
    Don 說她很像台南安平港的林默娘雕像守護行船的人.
    不管她像誰, 終究只是在詮釋他的意境. 還有是 我的第一件大作品,
    真的很有成就感.
    Hope~ 人總是對某些事物抱有希望.
    從希望當中去追求自己的夢想.

    這件未完成的作品, 我得加緊步伐, 趕快完成才能在展覽會場上亮相.

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