CN205653365U - Program control bar -shaped propellant powder forming die that ftractures - Google Patents
Program control bar -shaped propellant powder forming die that ftractures Download PDFInfo
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- CN205653365U CN205653365U CN201620471755.4U CN201620471755U CN205653365U CN 205653365 U CN205653365 U CN 205653365U CN 201620471755 U CN201620471755 U CN 201620471755U CN 205653365 U CN205653365 U CN 205653365U
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Abstract
The utility model relates to a propellant powder forming die, the program control bar -shaped propellant powder forming die that ftractures who has big star hole diameter ratio, a little star -a concubine root diameter who indicates especially that solvent -free triton presses that forming technology uses. Including mould needle and die sleeve two parts, mould needle structure contains punch block section, changeover portion, star needle section, the die sleeve structure contains punch block location section, compression section, shaping section. The difficult problem of the bar -shaped propellant powder of the unable shaping program control fracture of the solvent -free triton of prior art pressure forming technology has been solved effectively to this mould.
Description
Technical field
This utility model relates to a kind of propellant powder mould, having of the molded technique of the most solvent-free triton
Big star bore dia ratio, the Programmed Splitting propellant powder mould of starlet root diameter.
Background technology
Programmed Splitting propellant powder is a kind of high cumulative property Novel emission medicine, and the cumulative property of its geometry exceedes existing
19 holes and 37 hole propellant powder.Improving the cumulative property of propellant powder is to improve cannon, particularly large aperture cannon
The main method of muzzle velocity.It is that exploitation high-performance cannon improves bullet that procedure of development controls the bar-shaped propellant powder of cracking
The research direction of ball initial velocity.
Programmed Splitting propellant powder be draw ratio more than 20, there is star bore dia than big, star root diameter
The bar-shaped propellant powder in star hole of the little feature of the sharp width of little, star.Its star bore dia, star root diameter, star point width are
Affect the key data of the cumulative property of Programmed Splitting propellant powder.
The bar-shaped propellant powder molding of existing star hole mainly has two kinds of techniques, and one is that solvent method is extruded, and two is nothing
Solvent triton is molded.Two kinds of techniques are respectively arranged with pluses and minuses.
Solvent method extruded use acetone, ethanol, ethyl acetate equal solvent by after molten for propellant powder moulding,
Squeezed out the bar-shaped propellant powder requiring size by mould under 10MPa～20MPa pressure.Solvent method is extruded
Time, it is low that solvent and propellant powder molten moulds system viscosity, and the pressure that extrusion process needs is little, the requirement to mould
Little.But the bar-shaped propellant powder squeezed out is molten in needing to carry out the technical process such as water logging, drying expeling propellant powder
Agent.Gun propellant combustion layer thickness is the biggest, drives molten the most difficult.Therefore big arc thickness propellant powder molding is not suitable for.With
Time, owing to briquetting pressure is little, in molding, solvent occupies certain volume to the extruded propellant powder of solvent method, because of
This drive molten after the finished product propellant powder density that obtains less.
Solvent-free triton is molded, by controlling screw compress machine each portion temperature, allows and has the transmitting of thermoplasticity feature
Medicine material is in 60～90 DEG C of viscous states, is squeezed out by mould and require size under 50MPa～60MPa pressure
Bar-shaped propellant powder.When solvent-free triton is molded, material viscosity is big, and extrusion process pressure is big, to mould
Requirement high, the bar-shaped propellant powder squeezed out need not drive molten process, and propellant powder finished product density is big.Solvent-free
When triton is molded, extrusion process pressure is big, and mould design, processing are that Programmed Splitting is launched
The difficult problem that medicine is developed.
Institutes Of Technology Of Nanjing of China has carried out Programmed Splitting propellant powder theoretical research, it is contemplated that without molten
Greatly, its development type uses solvent method molding for the design of agent spiral shell molding die, difficulty of processing.
In the prior art, solvent-free triton molding die can the bar-shaped propellant powder in molding star hole, but cannot become
What type met that Programmed Splitting propellant powder uses has big star bore dia ratio, starlet root diameter feature
The bar-shaped propellant powder in star hole.Subject matter has:
Tradition star hole bar-shaped medicine forming die structure, by threadeding between punch block with star pin, punch block center has directly
The centrosome that footpath is bigger, in centrosome, processing connects the screw of star pin.Punch block centrosome is by three or four
Muscle connects punch block centring ring, and the muscle thickness of punch block is big, when molding, when material is by punch block section, and centrosome
Fluid mechanics can be divided into the porose three sections of arc logistics in center with dowel.Arc stream passes through punch block section
Enter behind compression section, can heal into complete ring-type under stress and be again divided into by star pin there is star aciculiform
The arc logistics of shape.Owing to forming process material viscosity is high, briquetting pressure is big, material when segmentation and healing,
Can produce lateral flow, lateral flow can produce the biggest lateral pressure on mould and mould pin.Lateral pressure
Power produce cause tradition star punch die star pin diameter ratio can not be excessive, excessive star pin diameter can cause star pin
Lateral force area is big, side force is big.In molding, side force makes the bending of star pin or star pin with punch block screw thread even
The weakness connect deforms and causes star pin position in mould to be displaced to side from center.This skew is in molding
During irreversible, in powder column center, (we are not called partially to cause the bar-shaped propellant powder star hole that molds
Hole).The medicine in hole partially, it is impossible to meet and use requirement.When being commonly designed, star hole bar-shaped medicine star pin diameter is less than
Centerbody size.Therefore traditional moulds structure molding cannot have bar-shaped of the star-shaped aperture of bigger star bore dia ratio
Penetrate medicine.
The screw thread that the star pin of tradition star hole bar-shaped medicine mould is connected with punch block owing to needing design, therefore star
The groove initiating terminal of pin, after the connection screw thread of star pin, is in the compression section of die sleeve.In order to ensure that molding is produced
Product density is homogeneous, and the runner of mould composition should have runner along with Flow of Goods and Materials in compression section, its cross section
The long-pending requirement that should be gradually reduced.Meanwhile, in order to ensure appearance quality of formed product, the profiled section of die sleeve should have
There is the requirement that flow area can not change.Therefore, star pin groove initiate star pin groove reach prescribed depth should
Complete in the compression section of mould, not can exceed that die sleeve compression section taper flow with the increments of clock star pin groove area
Road area reduction, to ensure that runner is in material compression state all the time in compression section.Programme-control cracking rod
Shape propellant powder is for high cumulative property medicine shape demand, it is desirable to star hole has the biggest star bore dia and the least
Star root diameter, when causing using existing mould mode to design, star pin has star root by a relatively large margin in compression section
Trench cross section amasss variable quantity, is unsatisfactory in mould runner design, and style channel of compressing section must assure that along with thing
Stream is moved, the requirement that its sectional area should be gradually reduced.Therefore, the Design of Dies structure of prior art can not be used
In the star-shaped aperture bar-shaped propellant powder molding with big star bore dia ratio, starlet root diameter feature.
Utility model content
It is straight that this utility model can not meet big star hole for the bar-shaped medicine in existing star hole solvent-free triton molding die
Footpath ratio, the Programmed Splitting propellant powder molding of starlet root diameter feature need, and devising one can
Carry out the Programmed Splitting propellant powder mould of big star bore dia ratio, starlet root diameter feature.
The mould that this utility model provides, including:
Mould pin and die sleeve two parts；
Described mould needle construction comprises punch block section, changeover portion, star pin section；
The punch block section of described mould pin is made up of the muscle divided equally in outside locating ring and ring；Muscle crosses in centre,
Intersection forms the centrosome that crosses；The centerbody size thickness according to muscle that crosses is at intersection's self-assembling formation, no
Reprocessing is specifically used for the centrosome that processing connects the large-size of screw thread；
Described mould pin transition section structure is identical with the structure of the muscle divided equally in punch block section locating ring；Changeover portion outer diameter ruler
Very little from locating ring inner chamber size arc transition to star pin size；
Described mould pin star pin segment structure is identical with the structure of the muscle divided equally in punch block section locating ring；Star pin section outer diameter ruler
Very little determine according to Programmed Splitting propellant powder medicine star bore dia；
(star hole is straight more than 0.75 for the outside dimension of described mould pin star pin section and the ratio of die sleeve profiled section intracavity diameter
Footpath ratio)；
Described die sleeve structure comprises punch block positioning section, compression section, profiled section.
Described die sleeve punch block positioning section is for the location and installation of mould pin punch block section；
Described die sleeve compression section is the die sleeve punch block positioning section tapering transition section to die sleeve profiled section, and tapering is
20 °～60 °, changeover portion inlet size is the punch block section locating ring inner chamber size of mould pin, and changeover portion outlet size is
Die sleeve profiled section inner chamber size；
The star hole of described die sleeve profiled section material finished product in molding and outside dimension sizing, its size is by journey
Sequence controls the bar-shaped propellant powder outside dimension of cracking and technique is shunk feature and determined；
Further improvement of the utility model is, the muscle number in the star pin number of teeth and punch block positioning section reduces, minimum
Minimum reduce to 3；Muscle number in the star pin number of teeth and punch block positioning section increases, and at most increases to 12；
Further improvement of the utility model is, the muscle number in punch block positioning section is unnecessary and is less than the star pin number of teeth；
Yet further, after die assembly, star pin length exceeds steel bushing 0～40mm.
Yet further, after die assembly, star pin is shorter in length than steel bushing 0～40mm
Yet further, flap is welded on star pin.
Disclosed in this utility model, a kind of Programmed Splitting propellant powder mould, is arranged on screw extrusion
On machine mould bases, its ultimate principle is such that propellant powder material after screw extruder, formed high temperature without
Solvent viscoelasticity spice, under screw extruder pressure transmission, spice is through the mould formed by die sleeve and mould pin
Tool cavity runner, in punch block section by the muscle cutting on punch block, is further consolidated in compression section, at profiled section
Gradually shape according to pin and die sleeve size shape, become after extrusion die, have effigurate external diameter and star
The medicine rod of shape endoporus.This formed in mould bar-shaped propellant powder is utilized to have big star bore dia ratio, starlet root diameter
Feature, be in order control ftracture bar-shaped propellant powder medicine shape requirement.This mould efficiently solves existing skill
The molded technique of the solvent-free triton of art cannot Composition control ftracture bar-shaped propellant powder a difficult problem.
Accompanying drawing explanation
This utility model has 5 width accompanying drawings
Fig. 1 is this utility model mould installation diagram；
Fig. 2 is this utility model mould needle construction figure；
Fig. 3 is this utility model mould pin punch block segment structure figure；
Fig. 4 is this utility model die sleeve structure figure；
Fig. 5 is Programmed Splitting propellant powder structure chart.
Detailed description of the invention
For making those skilled in the art to become apparent from, understanding spirit of the present utility model accurately, knot below
Close accompanying drawing specific embodiment of the utility model is elaborated.
Seeing Fig. 1, Programmed Splitting propellant powder mould described in the utility model, including mould pin
1 and die sleeve 2 two parts.
Seeing Fig. 2, mould pin 1 structure described in the utility model comprises punch block section 1-1, changeover portion 1-2, star pin section
1-3；
Seeing Fig. 3, punch block section 1-1 of this example mould pin 1 is by the 8 lobe muscle divided equally in outside locating ring 1-4 and ring
1-5 forms；Muscle 1-5 crosses in centre, and intersection forms the centrosome that crosses；Cross centerbody size root
According to the thickness of muscle 1-5 at intersection's self-assembling formation；Changeover portion 1-2 and star pin section 1-3 are by the 8 of punch block section 1-1
Root muscle 1-5 continues formation, and muscle is identical with the thickness of pin, external diameter from punch block arc transition to pin footpath.Punch block section
1-1, changeover portion 1-2, the muscle of star pin section 1-3 are integrated processing；
Seeing Fig. 4, die sleeve 2 described in the utility model comprises positioning section 2-1, compression section 2-2, profiled section 2-3；
The outside dimension of mould pin 1 star pin section 1-3 described in this example and the ratio etc. of die sleeve 2 profiled section 2-3 intracavity diameter
In 0.8；Mould pin 1 star root diameter described in this example is equal to 2mm；
Mould pin 1 and die sleeve 2 fit together in positioning section cooperation, collectively form mould molding runner.Propellant powder
Material, after screw extruder, forms high temperature solvent-free viscoelasticity spice, in screw extruder pressure transmission
Under, spice is through cavity body of mould runner, in punch block section 1-1 by the muscle cutting on punch block, at compression section 2-2 quilt
Compacting, gradually shapes according to pin and die sleeve size shape at profiled section 2-3, becomes after extrusion die further,
There is big star bore dia ratio, the medicine rod of the star endoporus of starlet root diameter.Utilize this formed in mould bar-shaped
Penetrate medical instrument and have big star bore dia ratio, the feature of starlet root diameter, the control bar-shaped propellant powder medicine of cracking of being in order
Shape requirement.See Fig. 5.
Claims (6)
1. a Programmed Splitting propellant powder mould, it is characterised in that include mould pin (1) and die sleeve (2) two parts；
Described mould pin (1) structure comprises punch block section (1-1), changeover portion (1-2) and star pin section (1-3)；The punch block section (1-1) of described mould pin (1) is made up of the muscle (1-5) divided equally in outside locating ring (1-4) and ring；Muscle (1-5) crosses in centre, and intersection forms the centrosome that crosses；Cross the centerbody size thickness according to muscle (1-5) at intersection's self-assembling formation；Described mould pin changeover portion (1-2) structure is identical with the structure of the muscle (1-5) divided equally in punch block section locating ring；Changeover portion (1-2) outside dimension from locating ring inner chamber size arc transition to star pin size；Described mould pin star pin section (1-3) structure is identical with the structure of the muscle (1-5) divided equally in punch block section locating ring；Star pin section (1-3) outside dimension determines according to Programmed Splitting propellant powder medicine star bore dia；The outside dimension of described mould pin star pin section (1-3) and the ratio of die sleeve profiled section intracavity diameter are more than 0.75；
Described die sleeve (2) structure comprises punch block positioning section (2-1), compression section (2-2) and profiled section (2-3)；Described die sleeve punch block positioning section (2-1) is for the location and installation of mould pin punch block section (1-1)；Described die sleeve compression section (2-2) is die sleeve punch block positioning section (2-1) the tapering transition section to die sleeve profiled section (2-3), tapering is 20 °～60 °, tapering transition section inlet size is punch block section (1-1) the locating ring inner chamber size of mould pin, and tapering transition section outlet size is die sleeve profiled section (2-3) inner chamber size；The star hole of described die sleeve profiled section (2-3) material finished product in molding and outside dimension sizing, its size is shunk feature by Programmed Splitting propellant powder outside dimension and technique and is determined.
A kind of Programmed Splitting propellant powder mould the most according to claim 1, it is characterised in that muscle number in the described star pin number of teeth and punch block positioning section is minimum minimum reduces to 3；Muscle number in the star pin number of teeth and punch block positioning section at most increases to 12.
A kind of Programmed Splitting propellant powder mould the most according to claim 1, it is characterised in that the muscle number in described punch block positioning section is more or less than the star pin number of teeth.
A kind of Programmed Splitting propellant powder mould the most according to claim 1, it is characterised in that after die assembly, star pin length exceeds steel bushing 0～40mm.
A kind of Programmed Splitting propellant powder mould the most according to claim 1, it is characterised in that after die assembly, star pin is shorter in length than steel bushing 0～40mm.
A kind of Programmed Splitting propellant powder mould the most according to claim 1, it is characterised in that flap is welded on star pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620471755.4U CN205653365U (en) | 2016-05-20 | 2016-05-20 | Program control bar -shaped propellant powder forming die that ftractures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620471755.4U CN205653365U (en) | 2016-05-20 | 2016-05-20 | Program control bar -shaped propellant powder forming die that ftractures |
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| Publication Number | Publication Date |
|---|---|
| CN205653365U true CN205653365U (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620471755.4U Active CN205653365U (en) | 2016-05-20 | 2016-05-20 | Program control bar -shaped propellant powder forming die that ftractures |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556146A (en) * | 2017-08-31 | 2018-01-09 | 西安近代化学研究所 | A kind of solvent-free companding shaping mould of multi-perforated propellant and pressure stretch technique |
| CN107673942A (en) * | 2017-10-30 | 2018-02-09 | 西安近代化学研究所 | A kind of small Article Number single hole propellant powder die design method |
| CN107721779A (en) * | 2017-10-30 | 2018-02-23 | 西安近代化学研究所 | A kind of small Article Number seven apertures in the human head propellant powder die design method |
| CN108727142A (en) * | 2017-12-13 | 2018-11-02 | 北京航空航天大学 | A kind of constant pressure spiral shell pressing molding device quickly unloading medicine |
| CN114456017A (en) * | 2022-01-28 | 2022-05-10 | 中北大学 | Center-opening type in-order splitting propellant powder and forming die thereof |
-
2016
- 2016-05-20 CN CN201620471755.4U patent/CN205653365U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556146A (en) * | 2017-08-31 | 2018-01-09 | 西安近代化学研究所 | A kind of solvent-free companding shaping mould of multi-perforated propellant and pressure stretch technique |
| CN107556146B (en) * | 2017-08-31 | 2020-02-14 | 西安近代化学研究所 | Solvent-free pressing and stretching forming die and pressing and stretching process for multi-hole propellant |
| CN107673942A (en) * | 2017-10-30 | 2018-02-09 | 西安近代化学研究所 | A kind of small Article Number single hole propellant powder die design method |
| CN107721779A (en) * | 2017-10-30 | 2018-02-23 | 西安近代化学研究所 | A kind of small Article Number seven apertures in the human head propellant powder die design method |
| CN107673942B (en) * | 2017-10-30 | 2020-05-29 | 西安近代化学研究所 | Design method of small-size single-hole propellant mold |
| CN108727142A (en) * | 2017-12-13 | 2018-11-02 | 北京航空航天大学 | A kind of constant pressure spiral shell pressing molding device quickly unloading medicine |
| CN108727142B (en) * | 2017-12-13 | 2020-07-14 | 北京航空航天大学 | Unload constant voltage screw press forming device of medicine fast |
| CN114456017A (en) * | 2022-01-28 | 2022-05-10 | 中北大学 | Center-opening type in-order splitting propellant powder and forming die thereof |
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| GR01 | Patent grant |