一个韦恩斯伯勒市（Waynesboro）制造的模样将助约翰斯敦公司（Johnstown company）铸造一个7万6千磅重的渣罐。渣罐是为一家阿根廷工厂生产的，工人使用罐子熔化的钢铁浇注而成。利用这个模具，工厂一年可生产6个这样的渣罐。
精密模样工程公司在西五街，是兰迪斯机公司店铺（Landis Machine Co shop）的旧址。而约翰斯敦特殊铸造将它租下来用于生产一个该公司史上最大的单件模样。
公司的共同拥有人和铸造师傅约瑟夫·佛罗伦萨先生说：“在过去四五年中，我们一直在为约翰斯敦特殊铸造工作。”
佛罗伦萨先生和公司的其他老板格雷格克良克顿（Greg Crunkelton）先生、鲍勃麦克卡德尔（Bob McCardell）先生以及雇员达里尔伍德林（Daryl Woodring）先生一起建造了这个独特的模样。
根据佛罗伦萨先生的朋友比尔黑尔佛利克先生的描述，这个模样直径有12英尺，总体长度达16.5英尺。由一系列1.75英寸厚的环形结构组成，每个环由16段接合而成。最后把这76个完整的环堆叠起来，粘在一起并用螺丝锁住就制成了模样的成品。
他说：“这个项目需要大规模的工程和计划，制作了数量庞大的模板和夹具。四个模样工人紧张工作了2个月半，用掉了8000英尺的干糖松板才得以完成”。
根据黑尔佛利克先生的介绍，在金属铸造中，模样也就是将要制作的部件的反面形状被放在一个金属壶中，周围充满带粘结剂的砂。当砂变硬之后，把模样取走，留下模具。要制造实际的铸件，需把原材料放入铸造厂的炉子里在2500度的高温下熔化。
黑尔佛利克先生解释说：“当金属熔化时，杂质或渣会浮起来，纯净的金属则停留在底部。把质量好的金属倒入模具制造需要的铸件后，渣会被倒入一个渣罐，后期再处理。”
佛罗伦萨先生说：“这是我们迄今为止制作过的最大的模样。它需要渊博的工程学知识和特殊的装置来制作。看到最后出来的结果我们都很高兴。铸造过程中也出现过一些小故障，但好在总体上这个项目还是顺利的。”
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Precision Pattern Works makes massive mold for steel industry
A Waynesboro made pattern will help a Johnstown company cast a 76,000 pound slag pot, a pot molten steel is poured into, for a steel mill in Argentina. The mold will be used to make six slag pots per year.
Precision Pattern Works, located in the former Landis Machine Co shop on West Fifth Street, was hired by Johnstown Specialty Castings to create the largest, one piece pattern the company has ever made.
Co owner and master patternmaker Mr Joseph Florence said that "We've been doing work for Johnstown Specialty Castings for the past four or five years."
Mr Florence created the unique pattern with co owners Mr Greg Crunkelton and Mr Bob McCardell and employee Mr Daryl Woodring.
According to Mr Florence's friend Mr Bill Helfrick, the oval shaped, hollow pattern is 12 feet in diameter and 16.5 feet long. It is constructed of 1 and ¾ inch thick rings, each made from joining 16 segments. The 76 completed rings were stacked, glued and screwed together to form the finished pattern.
He added that "The project required extensive engineering and planning, and the making of many templates and jigs to obtain the finished result. 8000 board feet of seasoned sugar pine and 2 1/2 months of intensive work by four pattern workers were needed to complete the job."
According to Mr Helfrick, in metal casting, the pattern, a mirror image of the part to be made, is placed in a metal flask and packed with sand containing a bonding agent. When the sand has hardened, the pattern is withdrawn leaving the mold behind. To make the actual casting, raw material is placed in a foundry furnace, turning molten when exposed to 2,500 degree heat.
Mr Helfrick explained that "As the metal melts the impurities or slag rises to the top and the purer metal settles on the bottom. After the good metal is poured into the mold to make the desired casting, the slag is poured into a slag pot for later disposal."
Mr Florence said that "This was the largest pattern we have ever made. It required a lot of engineering and special fixtures to make it. We are delighted with the way it turned out. There were a few glitches along the way, but all in all, the job went pretty smoothly, which is a plus."
