Bulk expansion and evacuation sealing device for small-sized automatic packaging machine

Patent Name Li Jinlian, Principal Investigator for Bag Enlargement and Evacuation Sealing Device for Small Automatic Packaging Machine Address: 362000 Futian District, Quanzhou City, Fujian Province, Yuyuan Building, Sanyuan Garden Room 307, inventor Li Jinlian Application (Patent) No. 200420095508.6 Application Date 2004.11.15 Certification date Approval Notice No. 2741875 Auditing announcement date 2005.11.23 Manual CD No. D0547 Main classification number B65B31/02 Classification No. B65B31/02; B65B43/26 Division Original application No. Expanding and evacuating sealing device for packing bag of automatic packaging machine, characterized in that the device comprises a front movable valve block (1) controlled by a driven cylinder mounted on the frame of the packaging machine, and a front valve block body ( 1) The rear valve block body (2) that cooperates with the work, the small air compressor used with the air cylinder, the vacuum pump for evacuation and the solenoid valve for expansion and evacuation control, wherein the front and rear valve blocks are provided with The three-way air inlet and outlet air holes D1, D2, and D3 can be formed. In addition, at the bottom of the front movable valve block body, a heat sealing assembly with an electric heating wire and used for packaging bags is installed. The device of the utility model can be used for automatically expanding the packaging bag on a small packaging machine, and automatically vacuum-packing and automatically sealing after the material enters the bag, and has the advantages of good reliability, small volume and high automation degree. Sovereignty item 1, a bag expanding and evacuating sealing device for a small-scale automatic packaging machine, characterized in that the device comprises: a driven cylinder block-controlled front movable valve block mounted on a packaging machine frame (1 A rear valve block (2) cooperating with the front valve block (1), a small air compressor used with the cylinder, a vacuum pump for evacuation and a solenoid valve for expansion and evacuation control, wherein The front and rear valve block bodies are provided with air inlet and outlet air holes D1, D2 and D3 which can form three air passages, wherein the D3 and D2 air holes respectively pass through the respective air inlet and outlet air inlets 15 and 19 on the front and rear valve blocks. The first and second air passages are formed respectively for squeezing the edges of the bags so that they can be opened so that compressed air can be blown from the mouths of the bags using an air compressor or a vacuum pump to expand the bags or from the mouths of the bags. The air is pumped out for vacuum packing, wherein the D1 air vent is through a rectangular air port (17, 22) communicating with it, and a third air passage is formed on the rear valve block for introducing compressed air from the bag mouth of the packaging bag to expand Bulging bags or evacuating bags to Vacuum sealing. In addition, at the bottom of the front movable valve block body, a heat sealing assembly with an electric heating wire and used for packaging bags is installed.