PE (Polyethylene) film sealing and cutting device

Abstract

The invention discloses a PE (Polyethylene) film sealing and cutting device, comprising a stand, wherein the stand is provided with a front seal mould head and a back seal mould head, both of which are oppositely arranged, and a filled package bag runs between the front seal mould head and the back seal mould head; a crankshaft connecting rod mechanism is hinged between the back end of a back mould head mounting plate and a stand back end plate, a swing plate at the middle part of the crankshaft connecting rod mechanism is connected with a positive and negative rotation servo motor, a movable cutter is suspended in the front seal mould head, a movable cutter push plate connected with the movable cutter is arranged outside the front seal mould head, a fixed cutter corresponding to the movable cutter is fixed in the back seal mould head, a contact surface of the back seal mould head and the front seal mould head is respectively provided with a heating sheet and a cushioning plate, and the movable cutter push plate is driven by a cutting cylinder on the stand to realize reciprocating movement. The PE film sealing and cutting device disclosed by the invention runs reliably, can immediately heat and seal a package film after finishing a cutting operation, is very convenient to regulate, can ensure the sealing and cutting efficiency of the PE film and is of an attractive seal.

Description

technical field [0001] The invention relates to a sealing and cutting device of a packaging machine, in particular to a packaging machine device for sealing and cutting PE films. Background technique [0002] More and more bag packaging products have entered people's daily life, and there are various packaging materials and equipment to realize this type of packaging, and plastic bags are the most widely used. Plastic bags are divided into composite film, single-layer PE film and so on. Among them, although the cost of single-layer PE film is the lowest, compared with other materials, it is also the most difficult to realize the sealing and cutting of single-layer PE film large packaging in automatic packaging machines. Moreover, users of this type of packaging require linear incisions instead of tooth-shaped incisions for the incision of the packaging bag. Since the seal is still in a hot state after heat sealing, the packaging film sticks to the knife when the cutting kni...

AI Technical Summary

Problems solved by technology

Among them, although the cost of single-layer PE film is the lowest, compared with other materials, the sealing and cutting of single-layer PE film large packaging in automatic packaging machines is also the most difficult to achieve.

Moreover, users of this type of packaging require linear incisions instead of tooth-shaped incisions for the incision of the packaging bag. Since the seal is still in a hot state after heat sealing, the packaging film sticks to the knife when the cutting knife is cut, resulting in the inability to achieve a straight line incision.

In addition, the sealing is to heat the packaging film to make the packaging film in a semi-melted state. At this time, the sealing line of the packaging film basically has no toughness. When filling, the packaging film is under the gravity of the material and is easy to be broken at the sealing line.

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