Sealing machine with a transportation structure

A sealing machine with a transportation structure has: a seal unit including an upper transporting set, a lower transporting set, a heating set, and a driving motor. The upper transporting set has a first conveying member, the lower transporting set has a second conveying member driven. The upper transporting set has an upper roller, and the lower transporting set has a lower roller for matching with the upper roller. The heating set has two heating rails and at least one electric bar, and each heating rail horizontally extends at a convey stork of the first conveying member and the second conveying member. Between the two heating rails is defined a slot. An outlet end of the slot corresponds to a pressing surface of the upper roller and the lower roller, the each heating rail has a groove so as to receive the at least one electric bar.

FIELD OF THE INVENTION

The present invention relates to a sealing machine, and more particularly to a sealing machine with a transportation structure which includes an input end and an output end so as to melt and seal an opening of an elongated plastic bag.

BACKGROUND OF THE INVENTION

A conventional vacuum sealing machine contains a movable arm disposed at a central position of a vertical plate on a rear side of a base of the vacuum sealing machine, and the movable arm swings and axially couples with a press bar so as to move with the press bar. The press bar has two sides connecting with a cylinder pillar so that the press bar returns back to an original position automatically. The movable arm has a nozzle cylinder fixed on a bottom end thereof and moving frontward and backward, and a forced lever has a wire secured therein and a heat-resistant cloth covered therearound. Thereby, the sealing machine seals a plastic bag by using the tee movable arm and the press bar. However, a length of the press bar is fixed, so an elongated plastic bag cannot be sealed, and the user has to replace another press bar with a longer length so as to seal the elongated plastic bag, thus having a complicated operation. In addition, the press bar with the longer length will increase a receiving space of the sealing machine.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a sealing machine with a transportation structure which includes an input end and an output end so as to melt and seal an opening of an elongated plastic bag.

To obtain the above objective, a sealing machine with a transportation structure provided by the present invention contains: a seal unit, and the seal unit includes an upper transporting set, a lower transporting set, a heating set, and a driving motor.

The upper transporting set has a first conveying member driven by the driving motor, the lower transporting set has a second conveying member driven by the driving motor, and the first conveying member and the second conveying member are used to clamp an elongated plastic bag, the upper transporting set has an upper roller disposed on an output end thereof, and the lower transporting set has a lower roller mounted on an output end thereof so as to match with the upper roller and used to press an elongated plastic bag which is heated.

The heating set has two heating rails and at least one electric bar, and each heating rail horizontally extends at a convey stork of the first conveying member and the second conveying member, between the two heating rails is defined a slot so as to place the elongated plastic bag which is heated and to correspond to a clamping surface of the first conveying member and the second conveying member, an outlet end of the slot corresponds to a pressing surface of the upper roller and the lower roller, the each heating rail has a groove formed therein so as to receive the at least one electric bar.

Thereby, the elongated plastic bag is horizontally put into two output ends of the first conveying member and the second conveying member, and an opening of the elongated plastic bag corresponds to an inlet end of the slot so that the first conveying member and the second conveying member clamp the elongated plastic bag and convey the elongated plastic bag to two output ends of the upper transporting set and the lower transporting set, and the opening of the elongated plastic bag is melted by the at least one electric bar in the slot, thereafter the elongated plastic bag is removed from the slot and is pressed and sealed by the upper roller and the lower roller.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference toFIGS. 1-8, a sealing machine with a transportation structure according to a preferred embodiment of the present invention comprises a seal unit1, and the seal unit1includes an upper transporting set11, a lower transporting set12, a heating set13, and a driving motor14.

The upper transporting set11has a first conveying member111driven by the driving motor14, the lower transporting set12has a second conveying member121driven by the driving motor14(the first conveying member and the second conveying member are a conveying chain has a heat-resistant effect), and the first conveying member111and the second conveying member121are used to clamp an elongated plastic bag3, the upper transporting set11has an upper roller112disposed on an output end thereof, and the lower transporting set12has a lower roller122mounted on an output end thereof so as to match with the upper roller112and used to press an elongated plastic bag3which is heated.

The heating set13has two heating rails131and at least one electric bar132(there are two electric bars provided in this embodiment), and each heating rail131horizontally extends along a conveying track of the first conveying member111and the second conveying member121. Between two input ends of the two heating rails131is defined a slot133so as to place the elongated plastic bag3which is heated and to correspond to a clamping surface of the first conveying member111and the second conveying member121; an outlet end of the slot133corresponds to a pressing surface of the upper roller112and the lower roller122. Each heating rail131has a groove134formed therein so as to receive the at least one electric bar (heating element)132.

In addition, the upper transporting set11also has a first guiding roller113, and two ends of the first conveying member111fit with the upper roller112and the first guiding roller113, the lower transporting set12has a second guiding roller123, and two ends of the second conveying member121fit with the lower roller122and the second guiding roller123, the first guiding roller113meshes with the second guiding roller123and is driven by the driving motor14, such that the driving motor14drives the first conveying member111and the second conveying member121so that the elongated plastic bag3is clamped by the first conveying member111and the second conveying member121.

The seal unit1also includes a fixing member15, and the fixing member15has a fixed seat151, a movable seat152, and a spring153. The upper roller112is axially fixed in the movable seat152, and the movable seat152is connected with the fixed seat151and vertically moves relative to the fixed seat151. The spring153has two ends abutting against the fixed seat151and the movable seat152, and the upper roller112is pushed by the spring153to abut against the lower roller122such that an opening of the elongated plastic bag3which is heated is sealed, and the spring153has a retractable elasticity so as to match with elongated plastic bags3with different thickness.

Also, the seal unit1further includes a mount16, and the mount16has a fixed post161, a movable post162, and at least one resilient element163. The fixed post161and the movable post162are defined between the first guiding roller113and the upper roller112, and the fixed post161is fitted with the first conveying member111. The movable post162is coupled with the fixed post161and vertically moves relative to the fixed post161. The resilient element163has two ends abutting against the fixed post161and the movable post162. A bottom surface of the first conveying member111is pushed by the resilient element163to abut against a top surface of the second conveying member121, such that the elongated plastic bag3is clamped so that the first conveying member111and the second conveying member121drive the elongated plastic bag3, and the resilient element163has a retractable elasticity so as to match with the elongated plastic bags3with different thickness.

The upper roller112has a plurality of press strips114for sealing the elongated plastic bag3, thus obtaining a sealing effect.

The seal unit1includes a guide slideway17corresponding to the slot133, and the guide slideway17has a hole171formed on an input end thereof so as to feed the elongated plastic bag3and has a predetermined contacting position for corresponding to the slot133as the elongated plastic bag3is fed into the guide slideway17.

An improvement of the sealing machine of the present invention comprises a base2for receiving the seal unit1, and the base2has an inlet21for putting the seal unit1into the base2and a control panel22for adjusting a temperature of the at least one electric bar132.

Referring further toFIGS. 4-8, in operation, the elongated plastic bag3is horizontally put into the sealing machine from the inlet21so that the elongated plastic bag3corresponds to two input ends of the first conveying member111and the second conveying member121, and the opening of the elongated plastic bag3corresponds to an inlet end of the slot133so that the first conveying member111and the second conveying member121clamp the elongated plastic bag3and convey the elongated plastic bag3to two output ends of the upper transporting set11and the lower transporting set12, and the opening of the elongated plastic bag3is melted by the at least one electric bar132in the slot133, thereafter the elongated plastic bag3is removed from the slot133and is pressed and sealed by the upper roller112and the lower roller122.

Thereby, the sealing machine with the transportation structure contains the first conveying member111and the second conveying member121so as to clamp and convey the elongated plastic bags3with different sizes, and then the elongated plastic bags3are sealed by the upper roller112and the lower roller122.