Feeding device of packaging machine

Abstract

The invention provides a feeding device of a packaging machine. The feeding device comprises a hopper. The feeding device is characterized by further comprising a bag opening expanding mechanism and a bag opening pressing mechanism, wherein the bag opening expanding mechanism comprises at least one left moving sheet and at least one right moving sheet; the left moving sheets are rotatably arranged on the left side edge of a discharge hole of the hopper, and the right moving sheets are rotatably arranged on the right side edge of the discharge hole of the hopper; the bag opening expanding mechanism further comprises a moving sheet driving mechanism for driving the left moving sheets and the right moving sheets to rotate; the bag opening pressing mechanism comprises at least one left pressing block and at least one right pressing block; the left pressing blocks are equal to the right moving sheets and are correspondingly matched with the right moving sheets; the left pressing blocks are equal to the right moving sheets and are correspondingly matched with the right moving sheets; and the bag opening pressing mechanism further comprises a pressing block translation mechanism. The feeding device for the packaging machine can ensure that materials in the hopper are fed into packaging bags smoothly, and bag openings can be kept stable during feeding; and the feeding device also can avoid the phenomenon of dislocation or twisting of the packaging bags, thereby ensuring high position precision and flatness of the follow-up procedure of sealing of the openings.

Description

technical field [0001] The invention relates to a packaging machine, in particular to a material unloading device of the packaging machine. Background technique [0002] Bag-in-bag packaging is a common packaging method at present. The steps are: first put materials (such as soybean milk powder, oatmeal, herbal tea granules, cakes, candies, etc.) into small bags, and then pack multiple small bags of materials into large packaging bag (i.e. the outer bag). [0003] The existing unloading device of a packaging machine includes a hopper and a bag mouth adsorption and opening mechanism; The suction cup translation cylinder, the right suction cup group and the right suction cup translation cylinder, the left suction cup group and the right suction cup group are all under the hopper, the left suction cup group is connected with the piston rod of the left suction cup translation cylinder, and the right suction cup group is connected with the piston rod of the right suction cup tra...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned unloading device is used to send the small bag material from the hopper into the large packaging bag, or when sending the bulk material from the hopper into the packaging bag. On the one hand, due to the large weight of a single small bag material or bulk material, Therefore, when the small bag material or block material falls into the packaging bag, it will have a greater impact on the packaging bag, which will easily cause the packaging bag, especially its mouth, to be dislocated or distorted. On the other hand, due to the single small bag material or block The volume of the material is large, and when the small bag material or block material falls into the packaging bag, its falling position is often random, so the packaging bag is often caused by the uneven distribution of the small bag material or block material in the packaging bag. The phenomenon of twisting and deformation of the mouth of the pocket

After the mouth of the packaging bag is dislocated or distorted, it will affect the position accuracy and smoothness of the subsequent sealing, and even cause the seal to be lax; moreover, if the packaging bag is dislocated or distorted seriously, it will As a result, the mouth of the bag cannot be fully opened, affecting the smooth entry of subsequent small bag materials or bulk materials into the packaging bag, and the unloading process cannot be completed

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