Process combining screw compression plasticizing granulation and screw compression extrusion molding
By combining single screw press-extension granulation technology with screw press-forming process in the production of screw press-forming double-base propellant, a continuous production line is formed, which solves the problems of low production efficiency and prone to combustion and explosion accidents in traditional processes, and achieves efficient and safe screw press-forming and molding production.
Patent Information
- Application Number
- CN202411728342.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-03-07
AI Technical Summary
The traditional screw pressure-to-double-based propellant molding processing technology contains high-energy explosives during the second-pass depressing, has a small process parameter range, and is harsh in production conditions, which are prone to combustion and explosion accidents, and has low production efficiency. It requires a separate production line and cannot achieve continuous production.
Single screw press-extension granulation technology is used to replace the second pass of groove calendering and granulation, and organically combine it with the screw press-forming process to form a continuous production line integrating screw press-forming and screw press-forming. The specific process flow includes drug granular drying, iron removal, screw granulation, pelletization, screw extrusion molding and drug column cutting.
Continuous operations of screw press granulation and screw press forming are achieved, production efficiency is improved, labor is reduced, and dangerous workers are reduced. The automation level is significantly improved. The performance of the produced medicine column is consistent with the traditional process and the density is better than that of traditional process.
Abstract
Description
Technical Field
[0001] The invention relates to a screw-pressing plasticizing granulation combined with screw-pressing extrusion molding process, and belongs to the field of screw-pressing modified double-base propellant molding and manufacturing. Background Art
[0002] The traditional screw-pressed double-base propellant molding process consists of three parts: absorption drug water-displacing process, calendering plasticizing granulation process and screw-pressing molding process. Since a large amount of solid components are added to the screw-pressed double-base propellant, plasticization is difficult, so the calendering plasticizing granulation process adopts two-pass calendering plasticizing technology. However, during the second calendering, because the screw-pressed double-base propellant contains a large amount of high-energy explosives, the process parameter range is small, the production conditions are demanding, and if the control is not careful, it is very easy to cause explosion accidents, causing personal and property losses. For this reason, a process using one-pass groove calendering + single-screw extruder granulation was developed to replace the two-pass calendering plasticizing granulation process. Since the single-screw extruder granulation process is different from the traditional extrusion molding process and requires a separate production line, the modified double-base screw-pressed production line consists of two separate units, extrusion granulation and extrusion molding, which cannot be produced continuously at the same time, with low production efficiency and more production labor. Summary of the invention
[0003] The purpose of the present invention is to adopt single screw extrusion granulation technology to replace the second groove calendering granulation in the production of screw compression modified double-base propellant, and organically combine it with the screw compression molding process to form a continuous production line integrating screw compression granulation and screw compression molding.
[0004] The objective of the present invention is achieved through the following technical solutions:
[0005] The present invention discloses a screw-pressing plasticizing granulation combined with a screw-pressing extrusion molding process, and the specific process flow is as follows:
[0006] 1) adding the modified double-base granules that have been subjected to groove rolling once to a drying device through a quantitative feeding device to remove moisture and increase the temperature of the granules;
[0007] 2) After the iron removal process, the granules obtained in step 1) are added into a screw granulator through a quantitative feeding device for plasticization and extrusion;
[0008] 3) The extruded medicine material is formed into medicine granules matching the shape of the second-pass calendering granulation by a granulator and a cutting machine;
[0009] 4) The drug pellets obtained in step 3) are then added to a screw extruder through a quantitative feeding device, and are screw extruded through a screw pressing mold. The extruded drug material is cut into drug column products of a predetermined length through a drug cutting device.
[0010] Beneficial Effects
[0011] The screw compression plasticizing granulation combined with the screw compression extrusion molding process of the present invention can simultaneously complete the tasks of screw compression granulation and screw compression molding, realize the continuous operation of screw compression granulation and screw compression molding, and improve the production efficiency. At the same time, new technologies such as automatic loading and unloading technology and automatic coding technology, automatic drug type detection and weighing technology, and automatic drug column conveying technology are adopted to improve the automation level, reduce the number of operators, reduce dangerous operators, and improve labor efficiency. DETAILED DESCRIPTION
[0012] The present invention will be further described below in conjunction with the embodiments.
[0013] Example
[0014] The present invention discloses a screw-pressing plasticizing granulation combined with a screw-pressing extrusion molding process, and the specific process flow is as follows:
[0015] The bagged medicine pellets are transported to the drying and feeding room. The feeding uses a medicine barrel conveyor. The conveyor is equipped with 12 buffer barrels, and the materials are manually added to the barrels. The medicine barrel conveyor and the lifting and pouring barrel device are used to pour the medicine pellets into the receiving hopper on the dry quantitative distributor. The dry quantitative distributor, the dry conveyor belt conveyor, and the dry feeding belt conveyor are used to evenly feed the horizontal vibration dryer. The horizontal vibration dryer adopts a two-stage drying and conveying mode to enhance the drying of the medicine. The medicine granules coming out of the horizontal vibration dryer are slid into the screw granulator through the drying discharging belt conveyor, bucket elevator, compression quantitative distributor, magnetic separator and guide slide pipe. After further plasticization of the medicine granulator, it is extruded through the 180 new granulation die and granulated by the granulator. The medicine granules are sent to the cutting machine through the granulation discharging belt conveyor. After further granulation by the cutting machine, they are evenly fed to the temperature regulating device through the cutting discharging belt conveyor, medicine granule temperature regulating quantitative distributor, and medicine granule temperature regulating feeding belt conveyor. The medicine granules coming out of the temperature regulating device are slid into the screw granulator through the medicine granule temperature regulating discharging belt conveyor, bucket elevator, compression quantitative distributor, magnetic separator, drum screen and guide slide pipe. In the extruder, the medicine particles are pressed and formed by the screw extruder and the new 380 mold. The formed medicine column is transmitted to the pneumatic rotary medicine cutter in the medicine cutting room through the roller medicine chute. During the medicine cutting process, the frame of the pneumatic rotary medicine cutter moves with the advancement of the medicine column. After cutting, the medicine column is pushed to the medicine receiving table. The medicine column on the medicine receiving table is placed on the detection and coding table for coding, medicine type detection and weighing by the truss manipulator. The truss manipulator puts the medicine column into the medicine box. After the medicine column is full, the cover of the medicine box is opened by the cover opening mechanism, and then the medicine box is changed to the trolley of the automatic transport device through the medicine column conveying line and the line changing mechanism. The medicine box filled with medicine columns is sent to the aging treatment workshop by the automatic transport device.
[0016] This production line realizes the one-time completion of screw pressing granulation and screw pressing molding, which more than doubles the production efficiency of traditional segmented production.
[0017] This production line adopts new technologies such as automatic loading and unloading technology, automatic coding technology, automatic drug type detection and weighing technology, and automatic drug column conveying technology, which significantly improves the level of automation. Three operators are required per shift, which is five fewer than the eight operators required per shift in the intermittent production line, thus reducing the number of dangerous operators.
[0018] The physical and chemical properties, mechanical properties and ballistic properties of the medicine pellets produced by this production line are basically consistent with those of medicine pellets manufactured by traditional calendering and plasticizing granulation process, and all meet the product technical requirements. The medicine pellet density is superior to that of traditional processes.
Claims
1. A screw compression plasticizing granulation combined with screw compression extrusion molding process, characterized in that: The specific process is: 1) adding the modified double-base granules that have been subjected to groove rolling once to a drying device through a quantitative feeding device to remove moisture and increase the temperature of the granules; 2) After the iron removal process, the granules obtained in step 1) are added into a screw granulator through a quantitative feeding device for plasticization and extrusion; 3) The extruded medicine material is formed into medicine granules matching the shape of the second-pass calendering granulation by a granulator and a cutting machine; 4) The drug pellets obtained in step 3) are then added to a screw extruder through a quantitative feeding device, and are screw extruded through a screw pressing mold. The extruded drug material is cut into drug column products of a predetermined length through a drug cutting device.