Material weighing and packaging scale

Abstract

The invention relates to a material weighing and packaging scale. The material weighing and packaging scale comprises a rack, and is characterized in that a feeding device, a distributing tank, a weighing scale and a bag clamping mechanism are installed on the rack; the feeding device comprises a feeding hopper and a rotary shaft, the rotary shaft is connected with a sector-shaped door, a first air cylinder and a second air cylinder are installed on the outer side of the feeding hopper, a piston rod of the first air cylinder is connected with the rotary shaft through a first connecting plate, and a piston rod of the second air cylinder is connected with the rotary shaft through a connector and a second connecting plate; and the bag clamping mechanism comprises a first bag clamping arm and a second bag clamping arm, a first bag clamping air cylinder and a second bag clamping air cylinder are installed between the first bag clamping arm and the second bag clamping arm, and a piston rod of the first bag clamping air cylinder and a piston rod of the second bag clamping air cylinder are rotationally connected with the middle of the first bag clamping arm. It is guaranteed that the weighing and packaging process of the packaging scale is more stable and accurate through the improvement to the feeding device and the bag clamping device.

Description

Technical field [0001] The invention relates to a packaging scale, in particular to a material weighing and packaging scale, belonging to the technical field of weighing and packaging equipment. Background technique [0002] Quantitative packaging scales are used in automatic quantitative packaging of industrial and agricultural automated production. The entire weighing process is controlled by a computer and completed automatically; it has the characteristics of fast weighing, high weighing accuracy, labor-saving, labor-saving, simple operation and convenient maintenance. [0003] The packaging scales in the prior art mainly have the following defects: (1) The feeding method of the packaging scale is to use air cylinders for feeding. Since the positions of the air cylinders are linear, the general method is to place them horizontally, which makes the air cylinder occupy The space is larger, and the shape of the packaging machine according to the stroke is larger, and the site occu...

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Problems solved by technology

[0003] The packaging scales in the prior art mainly have the following defects: (1) The feeding method of the packaging scale is to use the cylinder for feeding. Since the action position of the cylinder is linear, the general way is to place it horizontally, so that the cylinder occupies The space is large, according to the stroke, the shape of the packaging machine is also large, and the space occupied on site is also large. It is uneconomical for the packaging of granules below 2.5 kg on a small packaging scale.

(2) The existing feeding device controls the feeding speed and feeding amount by controlling the extension of the cylinder piston rod when feeding large or small packages. This method is prone to certain errors. lead to overfeeding

After the bag clamping device clamps the packaging bag, the discharge door of the scale body is opened, and the material enters the packaging bag during the loading process; since the material of the packaging bag is relatively soft, and the bag clamping devices on both sides of the discharge port are respectively controlled by The cylinders on both sides are controlled, and there is an inconsistency in the working rhythm of the left and right cylinders, which causes the shaking of the packaging bag during the filling process and affects the stability of the packaging process. In severe cases, the packaging bag may fall off from the bag clamping device. The phenomenon of polluting the operating space and wasting materials

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