External pumping vacuum packaging machine and operation method thereof

Abstract

An external pumping vacuum packaging machine and an operation method thereof are provided. The external pumping vacuum packaging machine comprises: a stage configured to place a bag to be packaged; a plastic package device disposed on the stage, which is configured to seal the bag to be packaged; a first clamping device and a second clamping device respectively configured to clamp both ends of a bag mouth of the bag to be packaged; and a tightening device configured to drive the first clamping device and/or the second clamping device to move, so as to increase the spacing between the first clamping device and the second clamping device and tighten the bag mouth of the bag to be packaged.

1 . An external pumping vacuum packaging machine, comprising:
 a stage configured to place a bag to be packaged;   a plastic package device disposed on the stage and configured to seal the bag to be packaged;   a first clamping device and a second clamping device respectively configured to clamp both ends of a bag mouth of the bag to be packaged; and   a tightening device configured to drive the first clamping device and/or the second clamping device to move, so as to increase a spacing between the first clamping device and the second clamping device and tighten the bag mouth of the bag to be packaged.   
     
     
         2 . The external pumping vacuum packaging machine according to  claim 1 , wherein the tightening device is connected with both the first clamping device and the second clamping device, and is capable of driving the first clamping device and the second clamping device to move towards opposite directions. 
     
     
         3 . The external pumping vacuum packaging machine according to  claim 1 , wherein the first clamping device comprises a first upper clamp plate and a first lower clamp plate which are arranged opposite to each other;
 the second clamping device comprises a second upper clamp plate and a second lower clamp plate which are arranged opposite to each other;   recesses are respectively provided at positions of the stage corresponding to the first clamping device and the second clamping device; the first lower clamp plate and the second lower clamp plate are respectively disposed in the recesses; and both clamping surfaces of the first lower clamp plate and the second lower clamp plate are in parallel and level to a surface of the stage.   
     
     
         4 . The external pumping vacuum packaging machine according to  claim 3 , further comprising a driving device,
 wherein the driving device is connected with the first upper clamp plate and the second upper clamp plate and configured to drive the first upper clamp plate and the second upper clamp plate to respectively move close to the first lower clamp plate and the second lower clamp plate.   
     
     
         5 . The external pumping vacuum packaging machine according to  claim 3 , wherein the first upper clamp plate, the first lower clamp plate, the second upper clamp plate and the second lower clamp plate are all in U-shaped structures. 
     
     
         6 . The external pumping vacuum packaging machine according to  claim 5 , wherein the plastic package device comprises a plastic seal bar; and the plastic seal bar is disposed in openings of the U-shaped structures on the stage and arranged in parallel to the surface of the stage. 
     
     
         7 . The external pumping vacuum packaging machine according to  claim 4 , wherein the tightening device adopts gear transmission or threaded transmission. 
     
     
         8 . The external pumping vacuum packaging machine according to  claim 4 , wherein the driving device adopts gear transmission or threaded transmission. 
     
     
         9 . The external pumping vacuum packaging machine according to  claim 1 , further comprising a controller,
 wherein the controller is configured to control the plastic package device, the first clamping device, the second clamping device and the tightening device.   
     
     
         10 . The external pumping vacuum packaging machine according to  claim 9 , wherein the controller stores a plurality of groups of parameters for clamping; and
 according to item parameters of bags to be packaged with different specifications, the controller is configured to control the first clamping device, the second clamping device and the tightening device to clamp and tighten the bag mouth of the bag to be packaged according to different parameters for clamping.   
     
     
         11 . The external pumping vacuum packaging machine according to  claim 9 , wherein the controller stores a plurality of groups of plastic package parameters of the plastic package device; and
 according to item parameters of bags to be packaged with different specifications, the controller is configured to control the plastic package device to seal the bag mouth of the bag to be packaged according to different plastic package parameters.   
     
     
         12 . The external pumping vacuum packaging machine according to  claim 10 , wherein the item parameters comprise materials and thicknesses of the bags to be packaged. 
     
     
         13 . The external pumping vacuum packaging machine according to  claim 10 , wherein the clamping parameters comprise a clamping force of the first clamping device, a clamping force of the second clamping device, and a tightening force of the tightening device. 
     
     
         14 . The external pumping vacuum packaging machine according to  claim 11 , wherein the plastic package parameters comprise a plastic package temperature, a pressing force and a plastic package time of plastic seal. 
     
     
         15 . The external pumping vacuum packaging machine according to  claim 1 , further comprising a vacuum-pumping device. 
     
     
         16 . The external pumping vacuum packaging machine according to  claim 15 , further comprising a controller,
 wherein the controller is configured to control the vacuum-pumping device to perform vacuum-pumping on the bag to be packaged.   
     
     
         17 . The external pumping vacuum packaging machine according to  claim 15 , wherein the vacuum-pumping device comprises an exhaust tube disposed over the stage; and the exhaust tube is intersected with a connecting line of the first clamping device and the second clamping device. 
     
     
         18 . The external pumping vacuum packaging machine according to  claim 17 , wherein the exhaust tube is a flat exhaust tube. 
     
     
         19 . An operation method of the external pumping vacuum packaging machine according to  claim 1 , comprising:
 clamping both ends of the bag mouth of the bag to be packaged;   tightening the bag mouth of the bag to be packaged; and   sealing the bag to be packaged.   
     
     
         20 . The operation method according to  claim 19 , further comprising:
 performing vacuum-pumping on the bag to be packaged before sealing the bag to be packaged.