Extrusion Asia Edition 2-2018

47 Extrusion Asia Edition 2/2018 F rom simple single layer to multi-layer structure, from grid- shape, X-shape to irregular-shape design of hollow die, the technical difficulty of traditional hollow die is how to avoid sur- face indentation problem. For example, UV layer usually used on the surface of hollow board for anti ultraviolet and enhance weather ability, but the surface indentation will reduce the strength of the product and increase production cost. Few years ago, GMA group has successfully overcome this difficulty of hollow die, this technology is used in producing both for PC hollow board with UV coating layer and PP two-color hollow board. Via GMA’s new hollow die, surface material can be saved about 15%. The PP hollow board is one of mature product and also price sensitive product at recently years. In order to increase custo- mers’ profit, GMA developed this new hollow die, and it can help users to effectively save 50% surface material cost, with micro-foaming three-layer structure and production technolo- gy, the PP hollow board will be more widely used. After con- tinuous experiment and improving, compared with PP hollow board, the new PP micro-foaming hollow board is more light in weight, but the carrying capacity is the same, or even higher. This is breakthroughs of PP hollow board. On chart 1, from the compression test, we can see the carrying capacity of PP micro- foaming hollow board ( Picture 1 ) with weight 660g is the same as PP hollow board with 750g. This result proves that the micro-foaming technology not only makes PP hollow board light in weight, but also increases the carrying capacity and ma- terial cost saves about 15%. GMA three-layer hollow die helps users to save 50% cost of master batch and brings users quite great benefit. Remark : 1. Lab conditions-temperature: 23±2 ℃ 2. Lab conditions- relative humidity: 50±5% 3. Testing speed: 1.3mm/min GMA always stands in customers’ position and to improve quality of the die, to increase product profit for customers as well as create more additional value of product. The customer benefits of three-layer hollow die: 1. Reduce production cost 2. Enhance practicality of product (light weight, but also increases the carrying capacity) 3. Able to coat functional material on the surface, multi- function for additional value of product. 而政鈺三層複合中空模具，可進一步節省50%的色母添加 量，整體下來經濟效益驚人。 備註： 1. 實驗室條件-溫度：23±2℃ 2. 實驗室條件-相對溼度：50±5% 3. 測試速度：1.3mm/min 政鈺總是站在客戶之立場,思索更多模具提升精進方案， 提升客戶利潤，創造產品附加價值。 政鈺複合三層中空模具對客戶的利益 1. 降低客戶生產成本 2. 強化原產品實用性 (輕量化並提高承載力) 3. 表層可塗覆功能性材料,多元化應用擴充產品附加價值 圖 1: 傳統中空模具的表層凹陷問題 Picture 1: Traditional hollow die design is easy to get problem on surface indentation 圖 2: 政鈺專利三層複合微發泡中空板 Picture 2: Three-layer micro-foaming hollow board made from GMA new patent hollow die 圖 3: 微發泡中空板切面放大圖 Picture 3: The enlarged cross section of micro-foaming hol- low board GMA Machinery Enterprise Co., Ltd. No.28 Lane 362 Sec. 2 Yung Hsing Rd Wu Chi Dist Taichung 435 Taiwan www.gmatw.com