Automatic unpacking and feeding method for granular materials

Abstract

The invention discloses an automatic unpacking and feeding method for granular materials. A bag carrying machine is adopted for carrying material bags to a discharging mechanism; in the discharging mechanism, the material bags are supported by a bag supporting mechanism; the bottoms of the material bags are linearly cut by a cutting mechanism, and discharging begins; a folding and unfolding mechanism is used for repeatedly folding and unfolding the material bags after supporting claws are inserted into the material bags from cutting openings, and intermittent impacting is carried out on the bag walls of the material bags by pulse type high-pressure airflow when the material bags are tensioned, and residual materials are discharged; and a material collecting and conveying mechanism is used for collecting the discharged materials and conveying the discharged materials, so that automatic feeding is realized. Automatic unpacking, discharging and feeding are achieved in the method, and packaging bag chipping pollution to the granular materials is avoided; and through folding, unfolding and bag lifting of a supporting frame, bag shaking is carried out through a pulse type air blowing method, residual-free falling is achieved, and raw material waste is prevented.

Description

technical field [0001] The invention relates to the field of automatic feeding in industrial production, in particular to an automatic unpacking and feeding method for granular materials. Background technique [0002] The main raw material for the production of plastics such as biaxially oriented film BOPP is polymer particle PP material, which is packed and transported in woven bags. At present, most of the feeding of granular materials in China is still done manually, and there are many disadvantages in manual feeding. First of all, manual feeding seriously reduces the degree of automation of the process, and manual unpacking is labor-intensive and prone to fatigue, resulting in unstable feeding speed, which is prone to problems that the manual speed cannot keep up with supporting equipment; secondly, material bag feeding and cutting is a heavy task. It is tedious manual labor, and it is difficult for manual feeding to be efficient and smooth all-weather. Therefore, the ...

AI Technical Summary

Problems solved by technology

For the granular material package, Italy has developed an automatic feeding and cutting system for the polymer particle material package, which uses a manipulator to move the material package to a special cutter head bag breaker, then puts the material bag down, and the material bag falls to the cutter head This system is easy to break the woven bag and cause the problem that the woven bag debris pollutes the raw material

Similarly, some domestic automatic unpacking devices also have this problem, such as Chinese patent CN2013102767140 and patent CN201510116184, both use saw blades or blades to destructively unpack bags, which is prone to bag debris

[0004] Chinese patent CN2015108873053 has improved this problem. When the bag is broken, the bag debris will not fall into the material pool with the material, but it still has the incomplete whereabouts of the material in the material bag, and it is easy to fall into the folds and corners of the material bag. The problem of residual material

However, Chinese patent 2016110411381 uses a magnetic needle as an unloading tool, and the needle moves up and down to shake the bag to help discharge the residual material. Chinese patent 2017100372440 helps discharge the material by vibrating and beating the bag from the outside. These devices or methods were found in the test. The jitter produced in the process is better for square brick-shaped material packages, but its strength and effect are not good enough for ordinary non-stereo-formed material packages. Due to many folds, it is still easy to leave residues in some corners, especially in the stacked places. Therefore, a new method of unpacking and loading is required

[0005] It can be seen that the automatic unpacking and feeding device in the prior art often produces packaging bag debris, which is easily mixed into the material, and the incomplete whereabouts of the material causes the problem of waste of residual material

Images