Co-extrusion die for packaging bag production

Patent Name Co-Extrusion Die for Packaging Bags Patent Applicant Chen Yifeng Principal Applicant Address 315491 No.23 Guangming West Road, Lishan, Yuyao, Zhejiang Province Ningbo Huafeng Packaging Co., Ltd. Inventor Chen Yifeng Application (Patent) No. 200510049394.0 Date of Application 2005.03 .18 Approval Date Approval Notice No. 1669775 Audit Notice Date 2005.09.21 Instruction CD No. D0538 Main Classification No. B29C47/26 Classification No. B29C47/26; B29C55/28 Sub-division Original Application No. Priority Item Abstract A kind of packaging bag production The co-extrusion die head includes a plurality of modules, and the plurality of modules are successively stacked and fixed to each other. There is a gap between the surfaces of each module and a spiral flow channel is distributed. The upper part of the spiral flow channel converges close to each other. In the ring gap of the die lip, the lower part of the spiral flow channel communicates with each feed port, and is characterized in that a plurality of feed inlets are distributed along the circumferential surface under the spiral flow path of each module. The feeding port on the module is in communication with each other, and the respective feeding inlets communicate with each other sequentially before and after passing through the tank. The lower end of the spiral flow channel is connected, which can increase the output, reduce the energy consumption, and is suitable for the promotion and application of co-extruded packaging bags. Sovereignty Clause 1. A co-extrusion die head for packaging bag production, comprising a plurality of modules, successively stacking and fixing a plurality of modules, with a gap between the surfaces of the respective modules, and distributed with a spiral flow The upper part of the spiral flow channel merges into an annular gap near the lip of the die head. The lower part of the spiral flow channel communicates with each feed port and is characterized in that it is distributed along the circumferential surface under the spiral flow channel of each module. A plurality of sub-feed inlets, sub-feed inlets are in communication with the total feed inlets on the module, and each sub-feed inlet is in communication with one another before and after passing through the tank, and at the same time communicates with the lower end of each spiral flow passage. . International Application International Publication Entering Country Date Patent Agency Ningbo Chengyuan Patent Office Co., Ltd. Agency Address Agent Yuan Zhongwei