CN104552991A - De-molding device for large-length-diameter-ratio composite material thin wall pipe and de-molding method of de-molding device - Google Patents
De-molding device for large-length-diameter-ratio composite material thin wall pipe and de-molding method of de-molding device Download PDFInfo
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- CN104552991A CN104552991A CN201410688005.8A CN201410688005A CN104552991A CN 104552991 A CN104552991 A CN 104552991A CN 201410688005 A CN201410688005 A CN 201410688005A CN 104552991 A CN104552991 A CN 104552991A
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- demoulding
- baffle plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a de-molding device for a large-length-diameter-ratio composite material thin wall pipe and a de-molding method of the de-molding device. The de-molding device comprises a first end part baffle, de-molding brackets, sleeve ring baffles, sleeve ring baffle adjusting devices, a de-molding ejection power device and a de-molding ejection rod, wherein more than two long-strip-shaped de-molding brackets are arranged and are uniformly arranged along the periphery on the same side of the first end part baffle; each sleeve ring baffle comprises more than two baffle sections and the baffle sections are located in a space formed by enclosing of the de-molding brackets and are connected with the de-molding brackets by the sleeve ring baffle adjusting devices; the shape formed by the baffle sections of the same sleeve ring baffle is the same as the shape of the outer surface of the large-length-diameter-ratio composite material thin wall pipe in the length direction; the de-molding ejection rod is connected with the de-molding ejection power devices; and the de-molding ejection rod penetrates through the first end part baffle to stretch into the space formed by the de-molding brackets. The de-molding device is suitable for de-molding the large-length-diameter-ratio composite material thin wall pipe with the axial compression strength weaker than the friction force between a product and a mold.
Description
Technical field
The invention belongs to field of compound material, be specifically related to a kind of stripper apparatus for big L/D ratio In A Thin-walled Tube of Composite and release method thereof.
Background technology
Along with the requirement of development people to composite material pipe of modern technologies is more and more higher, as large in tubing draw ratio, wall is thin, tubing cross section structure is complicated.For ensureing composite material pipe inner surface dimensional accuracy, usually adopt mandrel molding, and demoulding difficulty is the key factor that restriction mandrel molding prepares In A Thin-walled Tube of Composite development.At present prepare the release method of tubing for mandrel molding as follows:
Mould pretreatment: the mould preprocess method being in composite material pipe demoulding consideration at present has the supplementary modes such as releasing agent, demoulding wax, vacuum bag and the process of die surface tetrafluoroethene.The patent No. is that patent discloses of CN103878986A a kind ofly places at die surface the method that tubulose vacuum bag carrys out assisted demoulding in advance.This method reduces the coefficient of friction between goods and mould, improve tubing demoulding efficiency, but the method is suitable for the pipe fitting being easy to the demoulding, and usually and other method with the use of, be not suitable for big L/D ratio and tube wall.
Medium assisted demoulding method: patent CN103640129A employing gas assisted demoulding mode realizes the demoulding to thin-wall rubber bellow; Patent ZL200820131668.X adopts the demoulding of gases at high pressure assisting demolding device realization to thin wall plastic products moulding; Patent CN201310755986.9 adopts high-pressure medium assisted demoulding mode to realize the sebific duct demoulding; Patent CN202895534U adopts high-pressure hydraulic pump success demoulding bend pipe.Said method realizes unsticking between goods and mould by injecting assist medium between goods and mould, and then realize the tubing demoulding, for the pipe fitting of toughness better (percentage elongation is large) (as rubber, the good plastic products of toughness etc.) stripping result is excellent, and demoulding efficiency is high.But, thin-walled, big L/D ratio little for elongation at break and the large tubing of wall tension is greater than goods self-strength at medium importing process resistance, easily cause goods to destroy in knockout course.
Composite tool pre-installation: patent CN103640126A adopts and first fixes a ring-type tool in advance in end, composite core rod one end, then composite tubulose idiosome and this ring-type tool are solidified in the lump, finally with this ring-type tool for supporting stress point, realize the demoulding, ring-type tool excision the most at last.Should in the method for mould ends prepackage ring-type tool, be beneficial to composite tube wall circumferencial direction overall stressed and from the core surface demoulding.But this method is only applicable to the demoulding of the smaller thick-wall tube of major diameter, for big L/D ratio thin-wall pipes, because the frictional force of the whole goods of this knockout course and core rod is much larger than light-wall pipe axial compression strength, therefore only by the prefabricated ring-type tool of mandrel tip, thin-wall pipes must be caused to destroy near tool end.
Mould jacking mechanism: patent CN102632551A realizes the composite glass steel pipe demoulding by design jacking mechanism.Its principle is: the external mold being provided with closing device in mould side, and along the jacking mechanism that external mold circumference is arranged, this jacking mechanism is from external mold jacking to the jacking screw rod between external mold and pipe fitting and is located in the location-plate of external mold, when goods reach design strength, utilizes external mold and the jacking screw rod be embedded in goods, direct lifting, upset, after exiting jacking mechanism, utilizes the closing device of single radial cut door-plate, change mould diameter, thus realize the demoulding.But the method requires that goods reach higher design strength, is not suitable for for big L/D ratio thin-wall pipes.
Draft angle designs: draft angle design realizes the pipe demoulding comparatively effective method, but the method be not suitable for the high light-wall pipe of dimensional requirement.
Many lobes sectional die designs: many lobes sectional die mentality of designing is: core at least two pieces of template split compositions, and in the template of split, have at least a template to extract structure and the device of the demoulding out, thus mold releasability is more convenient simultaneously; Expansion type Design of Dies structure and thinking (patent CN102848501A) are: mould comprises interior bar, outer tube, carriage and some round modules that can piece together round mould, recombination process circle block combiner is in core state, during the demoulding, staggered by adjacent two circle modules and inwardly shrink to solve the interference problem during demoulding, conveniently take off composite material tube.But all there are the following problems for big L/D ratio light-wall pipe for many lobes sectional die and expansion type mould: Design of Dies is complicated; Mould Machining required precision is high, and traditional machine tool is difficult to meet the demands; There is gap in die assembly interface, affects end article precision and apparent mass; Mould Reusability is easily out of shape, poor stability; Mould design and manufacturing cost is high.
Summary of the invention
In order to overcome In A Thin-walled Tube of Composite core demoulding mould in prior art: design is complicated, requirement on machining accuracy is high; Traditional machine tool is difficult to meet the demands, and die assembly interface exists gap, affects end article precision and apparent mass; Mould Reusability is easily out of shape, poor stability; Die manufacturing cost is high, be unsuitable for the problems such as big L/D ratio light-wall pipe, the invention provides a kind of stripper apparatus for big L/D ratio In A Thin-walled Tube of Composite and release method thereof, the present invention is particularly useful for fabric and weaves in advance at die surface, and axial compression strength is less than the demoulding of the big L/D ratio light-wall pipe of frictional force between goods and mould.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is as follows:
For a stripper apparatus for big L/D ratio In A Thin-walled Tube of Composite, comprise first end baffle plate, demoulding support, collar baffle plate, collar baffle plate adjusting device, the demoulding eject power set and demoulding push rod; Demoulding support is strip, has more than two, and evenly arranges along the periphery of first end baffle plate the same face; Collar baffle plate comprises plural baffle plate lobe, baffle plate lobe is positioned at the space that demoulding support surrounds, and being connected on demoulding support by collar baffle plate adjusting device, the baffle plate lobe of same collar baffle plate surrounds the shape identical with the outer surface on big L/D ratio In A Thin-walled Tube of Composite length direction; Demoulding push rod is connected to the demoulding and ejects on power set, and demoulding push rod stretches in the space that demoulding support surrounds through first end baffle plate.
The demoulding ejects power set and is located at outside the space that demoulding support surrounds.
Refer to the space that all demoulding supports surround in the space that above-mentioned demoulding support surrounds, the center in space is in space to demoulding stent inner surface.
During the demoulding, be placed in the space that collar baffle plate formed with the big L/D ratio In A Thin-walled Tube of Composite of core, collar baffle plate adjusting device is used to distance between adjustment collar baffle plate and big L/D ratio In A Thin-walled Tube of Composite.
Above-mentioned stripper apparatus is applicable to the demoulding that axial compression strength is less than the big L/D ratio In A Thin-walled Tube of Composite of frictional force between goods and mould, is particularly useful for the In A Thin-walled Tube of Composite demoulding that fabric weaves in advance at die surface.
The baffle plate lobe of same collar baffle plate surrounds the shape identical with the outer surface on big L/D ratio In A Thin-walled Tube of Composite length direction, namely the shape of inner surface that formed of collar baffle plate is identical with the external surface shape of light-wall pipe, and the cross section of light-wall pipe can be the various shapes such as circular, square, polygon.
Collar baffle plate has two or more, and along the length direction spaced set of demoulding support.The damage during light-wall pipe demoulding can be avoided so further.
The above-mentioned stripper apparatus for big L/D ratio In A Thin-walled Tube of Composite, also comprises the second end baffle plate, the demoulding pulls power set and pull transmission device; Demoulding support one end and first end baffle plate are connected, and the other end and the second end baffle plate removably connect; Pull transmission device to be connected to the demoulding and to pull on power set, pull transmission device and stretch in the space that demoulding support surrounds through the second end baffle plate.
The above-mentioned demoulding pulls power set and is located at outside the space that demoulding support surrounds.Core can be deviate under demoulding push rod and the acting in conjunction pulling transmission device, further facilitates deviating from of core, and prevents the breakage of light-wall pipe better.
Above-mentioned big L/D ratio In A Thin-walled Tube of Composite is mandrel molding, and light-wall pipe cross section structure can be any one in circular, polygon or irregularly shaped cross section; The shape that collar baffle inner surface is formed is corresponding with the shape of light-wall pipe.
Preferably, the inner surface of all collar baffle plates is formed rectangular barrel-shaped.Further facilitate the demoulding of Circular Thin pipe like this.
The method of the above-mentioned stripper apparatus demoulding for big L/D ratio In A Thin-walled Tube of Composite, comprises the following steps that order connects:
A, the big L/D ratio In A Thin-walled Tube of Composite with core to be placed in space that collar baffle inner surface formed, the end of demoulding push rod is connected with the end, one end of core;
B, by collar baffle plate adjusting device controllable register lobe, make the inner surface of baffle plate lobe near the outer surface of big L/D ratio In A Thin-walled Tube of Composite;
C, the startup demoulding eject power set, and core is deviate under the effect of demoulding push rod.
Preferably, before big L/D ratio In A Thin-walled Tube of Composite is shaping, carry out pretreatment to core, pretreatment can be any one in the supplementary modes such as releasing agent, demoulding wax, vacuum bag or tetrafluoroethene process.
Said method, preferably, is arranged with the plural collar outside big L/D ratio In A Thin-walled Tube of Composite, the position of collar baffle plate is corresponding with cover ring position, and during the demoulding, the collar abuts against collar baffle plate ejects power set one side near the demoulding, after core is deviate from, remove the collar.The above-mentioned collar abuts against collar baffle plate ejects power set one side near the demoulding, and like this when the demoulding, the collar is by collar baffle, and the power that light-wall pipe is born is disperseed further, has further facilitated deviating from of core.
Described collar dimensions, quantity and installation site by light-wall pipe draw ratio, length, wall thickness, composite characteristics and between composite and mould tension force and coefficient of friction jointly determine, In A Thin-walled Tube of Composite draw ratio is larger, length is longer, wall is thinner, composite material rigidity is lower, between composite and mould tension force and coefficient of friction larger, then require that demoulding auxiliary sleeve ring size is larger, quantity is more, installation site is tighter; Ensure finally between any two ring sets between goods and mould frictional resistance be less than this section of goods ring axial compression strength.
The described collar can before light-wall pipe compound pre-installation global formation or install after light-wall pipe compound.Preferably, the collar is detachably connected on big L/D ratio In A Thin-walled Tube of Composite periphery.So further avoid light-wall pipe impaired.It, after successfully realizing itself and mould separating, removes from product surface by the described collar, and ensures that product surface is not destroyed.
Core one end is by demoulding push rod apical grafting, and the other end is pulled transmission device and sockets, and core is deviate under demoulding push rod with the acting in conjunction pulling transmission device.Further facilitate deviating from of core like this.
Preferably, the reinforcing material of big L/D ratio In A Thin-walled Tube of Composite is carbon fiber, glass fibre, aramid fiber, ultra high density polyethylene fiber, quartz fibre or basalt fibre.
Above-mentioned mentioned light-wall pipe refers to big L/D ratio In A Thin-walled Tube of Composite.
The NM technology of the present invention is prior art.
The present invention is used for the demoulding that the stripper apparatus of big L/D ratio In A Thin-walled Tube of Composite is the big L/D ratio In A Thin-walled Tube of Composite being less than frictional force between goods and mould for axial compression strength, avoid traditional release method and frictional force entirety between goods and mould is applied to goods axially, cause goods in the phenomenon of knockout course axial collapse, successfully solve a difficult problem for big L/D ratio In A Thin-walled Tube of Composite demoulding difficulty, and the big L/D ratio In A Thin-walled Tube of Composite demoulding of cross-sectional structure complexity can be realized, demoulding success rate is high, simple to operate, cost is low; Release method of the present invention, without the need to designing draft angle to mould (core), ensure that final light-wall pipe internal diameter size precision; Without the need to adopting sectional die and expansion type Design of Dies, Design of Dies and low cost of manufacture, it is high that rate recycled by mould, and product's dimensional precision is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for the stripper apparatus of big L/D ratio In A Thin-walled Tube of Composite;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is the B-B cross-sectional view of Fig. 1;
In figure: the 1-demoulding pulls power set; 2-first end baffle plate; 3-pulls transmission device; 4-demoulding support; 5-collar baffle plate; 6-collar baffle plate adjusting device; 7-big L/D ratio In A Thin-walled Tube of Composite; 8-core; The 9-collar; 10-demoulding push rod; The 11-demoulding ejects power set; 12 is the second end baffle plate.
Detailed description of the invention
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1
The stripper apparatus for big L/D ratio In A Thin-walled Tube of Composite as shown in the figure, is characterized in that: draw together first end baffle plate, demoulding support, collar baffle plate, collar baffle plate adjusting device, the demoulding eject power set and demoulding push rod; Demoulding support is strip, has more than two, and evenly arranges along the periphery of first end baffle plate the same face; Collar baffle plate comprises plural baffle plate lobe, baffle plate lobe is positioned at the space that demoulding support surrounds, and being connected on demoulding support by collar baffle plate adjusting device, the baffle plate lobe of same collar baffle plate surrounds the shape identical with the outer surface on big L/D ratio In A Thin-walled Tube of Composite length direction; Demoulding push rod is connected to the demoulding and ejects on power set, and demoulding push rod stretches in the space that demoulding support surrounds through first end baffle plate.
Collar baffle plate has two or more, and along the length direction spaced set of demoulding support.
The reinforcing material of above-mentioned big L/D ratio In A Thin-walled Tube of Composite is carbon fiber, glass fibre, aramid fiber, ultra high density polyethylene fiber, quartz fibre or basalt fibre.
Embodiment 2
Substantially the same manner as Example 1, difference is: for the stripper apparatus of big L/D ratio In A Thin-walled Tube of Composite, also comprises the second end baffle plate, the demoulding pulls power set and pull transmission device; Demoulding support one end and first end baffle plate are connected, and the other end and the second end baffle plate removably connect; Pull transmission device to be connected to the demoulding and to pull on power set, pull transmission device and stretch in the space that demoulding support surrounds through the second end baffle plate.Demoulding push rod is provided with preformed groove, and core is provided with the projection corresponding to preformed groove.Bracket end baffle plate 2 is connected by Bolt to position with support 4.
Big L/D ratio In A Thin-walled Tube of Composite adopts quartz fibre to be reinforcing material, and epoxy resin is matrix material, and core 8 length is 5m, and maximum gauge is 150mm.
First in core die surface acetone cleaning also releasing agent pretreatment; Mandrel surface braiding individual layer quartz textile after treatment, fabric thickness is 0.2mm; Hand paste-autoclave molding method is adopted to prepare quartzy In A Thin-walled Tube of Composite 7; The auxiliary collar 9 of the pre-installation demoulding, wherein auxiliary sleeve ring structure and In A Thin-walled Tube of Composite structure matching are shown in Fig. 2;
The method of the above-mentioned stripper apparatus demoulding for big L/D ratio In A Thin-walled Tube of Composite, the position of collar baffle plate is corresponding with cover ring position, during the demoulding, the collar abuts against collar baffle plate ejects power set one side near the demoulding, after core is deviate from, remove the collar, specifically comprise the following steps that order connects:
A, to be placed in by the big L/D ratio In A Thin-walled Tube of Composite with core in space that collar baffle inner surface formed, one end of core is connected with the end of demoulding push rod, and the other end is connected by suspension ring with pulling transmission device;
B, by collar baffle plate adjusting device controllable register lobe, make the inner surface of baffle plate lobe near the outer surface of big L/D ratio In A Thin-walled Tube of Composite, the collar is close to its corresponding collar baffle plate, and fixing, and namely each collar is all to there being corresponding collar baffle plate; Ensure that light-wall pipe 7 keeps static at knockout course near collar baffle plate 5 together with the auxiliary collar 9;
C, the startup demoulding eject power set and demoulding pulling power set, core is deviate under the effect of demoulding push rod, remove the pre-installation collar and final quartz fibre In A Thin-walled Tube of Composite is obtained to quartzy composite material tube surface treatment, the long 5m of end article, wall thickness 0.3mm.
Claims (9)
1. for a stripper apparatus for big L/D ratio In A Thin-walled Tube of Composite, it is characterized in that: comprise first end baffle plate, demoulding support, collar baffle plate, collar baffle plate adjusting device, the demoulding eject power set and demoulding push rod; Demoulding support is strip, has more than two, and evenly arranges along the periphery of first end baffle plate the same face; Collar baffle plate comprises plural baffle plate lobe, baffle plate lobe is positioned at the space that demoulding support surrounds, and being connected on demoulding support by collar baffle plate adjusting device, the baffle plate lobe of same collar baffle plate surrounds the shape identical with the outer surface on big L/D ratio In A Thin-walled Tube of Composite length direction; Demoulding push rod is connected to the demoulding and ejects on power set, and demoulding push rod stretches in the space that demoulding support surrounds through first end baffle plate.
2., as claimed in claim 1 for the stripper apparatus of big L/D ratio In A Thin-walled Tube of Composite, it is characterized in that: collar baffle plate has two or more, and along the length direction spaced set of demoulding support.
3. as claimed in claim 1 for the stripper apparatus of big L/D ratio In A Thin-walled Tube of Composite, it is characterized in that: also comprise the second end baffle plate, the demoulding pulls power set and pull transmission device; Demoulding support one end and first end baffle plate are connected, and the other end and the second end baffle plate removably connect; Pull transmission device to be connected to the demoulding and to pull on power set, pull transmission device and stretch in the space that demoulding support surrounds through the second end baffle plate.
4., as claimed in claim 2 or claim 3 for the stripper apparatus of big L/D ratio In A Thin-walled Tube of Composite, it is characterized in that: the inner surface of all collar baffle plates is formed rectangular barrel-shaped.
5. utilize the method for the stripper apparatus demoulding for big L/D ratio In A Thin-walled Tube of Composite described in claim 1-4 any one, it is characterized in that: comprise the following steps that order connects:
A, the big L/D ratio In A Thin-walled Tube of Composite with core to be placed in space that collar baffle inner surface formed, the end of demoulding push rod is connected with the end, one end of core;
B, by collar baffle plate adjusting device controllable register lobe, make the inner surface of baffle plate lobe near the outer surface of big L/D ratio In A Thin-walled Tube of Composite;
C, the startup demoulding eject power set, and core is deviate under the effect of demoulding push rod.
6. method as claimed in claim 5, it is characterized in that: outside big L/D ratio In A Thin-walled Tube of Composite, be arranged with the plural collar, the position of collar baffle plate is corresponding with cover ring position, during the demoulding, the collar abuts against collar baffle plate ejects power set one side near the demoulding, after core is deviate from, remove the collar.
7. method as claimed in claim 6, is characterized in that: it is peripheral that the collar is detachably connected on big L/D ratio In A Thin-walled Tube of Composite.
8. the method as described in claim 5-7 any one, it is characterized in that: demoulding push rod is provided with preformed groove, core one end is provided with the projection corresponding to preformed groove, core is provided with protruding one end and connects with the preformed groove of demoulding push rod, the other end is connected by suspension ring with pulling transmission device, and core is deviate under demoulding push rod with the acting in conjunction pulling transmission device.
9. the method as described in claim 5-7 any one, is characterized in that: the reinforcing material of big L/D ratio In A Thin-walled Tube of Composite is carbon fiber, glass fibre, aramid fiber, ultra high density polyethylene fiber, quartz fibre or basalt fibre.
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| CN201410688005.8A CN104552991B (en) | 2014-11-25 | 2014-11-25 | De-molding device for large-length-diameter-ratio composite material thin wall pipe and de-molding method of de-molding device |
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| CN201410688005.8A CN104552991B (en) | 2014-11-25 | 2014-11-25 | De-molding device for large-length-diameter-ratio composite material thin wall pipe and de-molding method of de-molding device |
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| CN104552991A true CN104552991A (en) | 2015-04-29 |
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| CN103640126A (en) * | 2013-12-10 | 2014-03-19 | 宁波市鄞州启久信息科技有限公司 | Demolding method and device of composite pipe blank |
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| CN109834958B (en) * | 2017-11-29 | 2021-05-07 | 中国航空工业集团公司济南特种结构研究所 | Demoulding device for cured composite material |
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