초록 ▼

A kind of automatic rotary weighing and packing machine having a plurality of weighers radially or annularly arranged on a circular rotary table for automatically effecting such processes as filling of product, weighing and judgement at respective positions around the table, which is especially suit

A kind of automatic rotary weighing and packing machine having a plurality of weighers radially or annularly arranged on a circular rotary table for automatically effecting such processes as filling of product, weighing and judgement at respective positions around the table, which is especially suitable in the case where the product to be packed is sticky granular or powdered bulk material and the packing container is a bag or the like. This machine uses no weigh hopper or bucket in which sticky product is liable to remain to cause weight error, and the packing container is held by a holding mechanism attached to each weigher and directly filled with product, which is then weighed and sealed. A fixed amount feeding device is used for feeding product into the container and its throughput is controlled based upon the result of a subsequent weighment for keeping the weight of product packed in each container always at a predetermined value.

대표청구항 ▼

A device for automatically filling and packing a predetermined weight of product in containers, comprising a first rotary table including a plurality of weighing heads arranged at equal intervals around said table, each weighing head including weight detecting elements and a bag-like container holdi

A device for automatically filling and packing a predetermined weight of product in containers, comprising a first rotary table including a plurality of weighing heads arranged at equal intervals around said table, each weighing head including weight detecting elements and a bag-like container holding mechanism, and a plurality of operating means disposed at first to sixth operating locations arranged in this order around said first rotary table for applying specific treatments to each weighing heads passing said locations; characterized by said operating means comprising: container feeding means for feeding a bag-like container to said holding mechanism to be held thereby when each of said weighing heads arrives at said first operating location, memory means for reading and storing the weight of said container detected by said weight detecting elements when each weighing head arrives at said second operating location, product feeding means for filling said container with a predetermined target weight of product when each weighing head arrives at said third operating location, arithmetic means for subtracting the stored weight of said container from the weight of the filled container detected by said weight detecting elements to calculate the net weight of said product for comparing said net weight with a predetermined allowable range to judge the acceptability thereof and for storing the result of judgement when each weighing head arrives at said fourth operating location, feed control means for adjusting the amount of feed of said product feeding means based upon the deviation of said net weight from said target weight while each weighing head is at said fourth operating location, sealing means for sealing the opening of said container to complete a packed product when each weighing head arrives at said fifth operating location, and delivery means for discharging said packed product from said holding mechanism and, if not acceptable, removing said product based upon said stored result of judgement when each said weighing head arrives at said sixth operating location.