The MultiHead has very high productivity in smaller elements such as flooring, pallet wood and fencing materials. The American division of the Wood-Mizer company has renewed manufacture of the MultiHead which stopped in 1995. During the Ligna exhibition, we put some questions Mr. Richard Vivers, CEO of Wood-Mizer Industries, Poland. - Ukrainian woodworking companies are becoming increasingly interested in productivity as labor rates increase. What can we expect from a Wood-Mizer MultiHead?
- If you saw typical pallet boards with a dimension of 100mm by 19mm, it is possible to expect production levels of 1 cubic meter of sawn lumber per hour per cutting head. Larger elements will result in higher productivity per hour, and smaller elements will result on lower productivity. Examples. In Portugal our client produces normal pallet boards meeting the requirements of the European market. Productivity - approximately 45 cubic meters of sawn material (not raw material)per 8 hour shift using a MultiHead with six cutting heads. Many of our clients in Portugal make thin boards of only 4 mm. These go into the manufacture of floor laminates, fruit boxes and fencing panels. The productivity of a 6 Head MultiHead is, in this case, approximately 9 cubic meters of sawn lumber during an 8 hour shift. These machines are operated at a speed of 9 m / min, while the maximum feed speed available is 30 m / min. To maximize the production of construction timber – for instance 50 x 150, it is better to cut a block on the breakdown sawmill to a size of 150 x 150mm and then to pass this to a 2 Head MultiHead which will re-saw this block into three 50 x 150 battens in one pass It increases the productivity of the Wood-Mizer breakdown saw by approximately by 50-100 %. - How do you calculate, how many cutting heads you require according to the material being produced?
- Establish the amount of material required per day, establish the sizes to be cut, and using an average feed speed of about 9m/min, you can calculate the number of heads required. We also have an Excell spreadsheet that you can use to help you to determine productivity in different sizes. - Does the mechanization around machines somehow influence on the productivity of MultiHead?
- The productivity and efficiency of the MultiHead depends on keeping the heads cutting at all times. This requires that blocks are always available and that they are fed “butt to butt” into the saws. This can be done manually, but is easier and less tiring if automated conveyors are used. Wood-Mizer has produced a “Merry-Go-Round” system that will ensure, with minimal physical effort, that the saw is kept fed at all times. WoodBusiness Magazine, Kiev, Ukraine