A drug material flow equalization device for a propellant extruder

A technology for extruders and propellants, applied in explosives, explosives processing equipment, offensive equipment, etc., can solve the problems of slow flow rate of charge, waste of charge, affecting the uniformity of charge column density, etc., and achieve the flow rate of charge Balance and improve the effect of current sharing effect

CN109485529BActive Publication Date: 2019-07-12SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-07-12

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Abstract

The invention discloses a medicine material flow equalizing device for a propellant extruder. The device comprises an outer cylinder, a mold body, a piston and a rubber pad, wherein the piston consists of a piston body, a piston rod and a rubber disc; a groove is formed in the bottom of the piston body; a ventilation hole communicated with the groove is formed in the top surface of the piston body; the rubber disc is fixed at the bottom of the piston body to enable a groove cavity of the groove to become an air storage chamber; inner holes of the outer cylinder are sequentially a pore diameterD1 section, a pore diameter D2 section and a pore diameter D3 section from top to bottom, and D2 > D1, D3 = D1; a plurality of medicine outlet holes with the same shape and size are formed in the mold body, through holes with the same position, number, size and shape as the medicine outlet holes on the mold body are formed in the rubber pad, and each through hole on the rubber pad is respectivelyaligned with the corresponding medicine outlet hole on the mold body when the rubber pad is fixedly connected with the mold body; and the piston body is mounted in the pore diameter D1 section, the rubber pad is mounted in the pore diameter D3 section, the mold body covers the bottom of the outer cylinder and is fixedly connected with the wall of the outer cylinder, and the pore diameter D2 section and the top surface of the rubber pad form a medicine material extrusion cavity.
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Description

Technical field

[0001] The invention belongs to the technical field of propellant extrusion molding, and relates to a propellant material flow equalizing device for a propellant extruder. Background technique

[0002] Propellant is the gunpowder used to complete projectile missions. In order to release its energy regularly, the propellant must have a specific shape. The main forming and processing method of the propellant is the extrusion method, that is, the plasticized propellant material is extruded from the mold with a certain pressure. During the extrusion process, the propellant material undergoes viscous flow, resulting in viscoelastic deformation. Grain with a certain shape and size is obtained.

[0003] However, when the existing propellant extruder is squeezed, the flow rate of the medicine at the core of the extrusion cavity is slow, and the flow rate of the medicine at the periphery of the extrusion cavity is fast, resulting in the medicine at the core of the extrusion...

Examples

Embodiment 1

[0025] In this embodiment, the charge equalizing device used in the propellant extruder is as figure 1 , figure 2 As shown, the outer cylinder 112, the mold body 114, the piston 113 and the rubber gasket 115 are included.

[0026] The piston 113 is as figure 2 , image 3 As shown, it consists of a piston body 1132, a piston rod 1133 and a rubber disc 1131. The piston rod 1133 is installed on the top surface of the piston body 1132. The center line of the piston rod and the center line of the piston body should be in a straight line during installation. The bottom of 1132 is provided with a groove, and the top surface is provided with a vent 110 communicating with the groove. The size of the rubber disk 1131 matches the groove. The rubber disk is fixed to the bottom of the piston body by vulcanization and covers the groove , And the bottom surface of the rubber plate 1131 is flush with the bottom surface of the piston body 1132, so that the cavity of the groove becomes the air st...

Embodiment 2

[0032] In this embodiment, the charge equalizing device used in the propellant extruder is as figure 1 , figure 2 As shown, the outer cylinder 112, the mold body 114, the piston 113 and the rubber gasket 115 are included. The difference from the structure of Embodiment 1 is: Aperture D2=Aperture D1+L.