Transforming plastic part designs into rapid prototypes with full geometry has become an essential part of the moldmaking process for today’s mold builders. Nobody can afford to make mistakes up front, which will take big dollars to fix later. The majority of rapid prototyping involves the use of two common rapid prototyping processes: stereolithography (SLA) [...]
Inefficient use of CAD technology in industry wastes millions of dollars each year. It is vitally important that businesses have the tools to quantify the skills of members of staff using CAD to make sure that they are right for the role in question, and that the role in question is right for them. Companies [...]
Checking for Positive DraftOn occasion tool marks can be so deep that they reduce the draft or the polisher accidentally takes off the draft. The key is to always check for positive draft by putting a six-inch scale on the wall and comparing the angle it makes to the parting line. It takes just a [...]
If we consider the primary metal of steel, which is iron, there are a number of features that we can observe immediately about the metal: […]
Of all the tasks polishers face in the moldmaking trade, texture and its related problems are probably among the most challenging. Getting hand texturing to match up perfectly with acid bath texturing is a skill entirely unto itself, but with a few tricks of the trade, almost any polisher will be able to stand up [...]
Many industries place strict requirements on the acceptable level of surface defects and imperfections that may appear on a plastic molded part. Such conditions often apply to critical components for the medical and pharmaceutical industries as well as for the manufacturers of lenses and other optical devices. However, for aesthetic reasons, many other consumer goods [...]
One of the most difficult jobs for any polisher is getting a high diamond finish on aluminum. Achieving a good shine in soft gummy material that constantly clogs stones and easily takes deep scratches from sandpaper is enough to challenge anyone. Brushing and buffing can easily lead to grooves and lines in the finished surface [...]
Annealing is the process of heating the steel to a particular temperature in the austenite region and cooling down the steel very slowly. There are many derivatives of the annealing process, but generally the process is a slow cool process. […]
Normalizing is a process that makes the grain size normal. This process is usually carried out after forging, extrusion, drawing or heavy bending operations. When steel is heated to elevated temperatures to complete the above operations, the grain of the steel will grow. In other words, the steel experiences a phenomenon called "grain growth." This leaves [...]
Stress relieving is an intermediate heat treatment procedure to reduce induced residual stresses as a result of machining, fabrication and welding. The application of heat to the steel during its machining or fabrication will assist in removing residual stresses that will, unless addressed during the manufacturing by stress relieving, manifest themselves at the final heat [...]