Air duct protection plate shaping equipment is used in soft-hard coextrusion sealing
Technical field
The present invention relates to middle technical field of polymer materials, especially a kind of soft-hard coextrusion sealing air duct protection plate sizing dress
Put.
Background technology
Plastic co-extrusion technology is plastic irregular profile forming technique emerging in recent years, is widely used in building industry (as door and window
Profile shapes, plastic furniture and interior/exterior decoration profile shapes), auto industry (as automobile plastic profile shapes accessory), packaging industry etc.
In field.With the continuous development of domestic and international co-extrusion technology, and in extrusion equipment, extrusion die optimization design, mould processing
The raising of the aspects such as technology, promotes plastic irregular profile product diversification and multifunction, and then while improving product specification,
Reduce the cost of product.During source material mixture ratio example, extrusion die, cooling and shaping and hauling speed are soft-hard coextrusion
Four principal elements, this plays conclusive impact to the apparent size of product and surface quality.Solving raw material, extrusion mould
After the influence factors of condition such as tool, traction, in soft-hard coextrusion profile shapes process units, the dependency structure of cooler-shaper, size
Conclusive effect all will be played to the size after product molding, surface quality etc..
Content of the invention
The purpose of the present invention is: a kind of soft-hard coextrusion sealing air duct protection plate shaping equipment, and it enables to improve air channel shield
The product demands such as profile material surface quality, extrusion dimensionally stable.
The present invention is achieved in that soft-hard coextrusion sealing air duct protection plate shaping equipment, including stock mould, stock mould
It is the functor die cavity of rectilinear structural member die cavity and arc line shaped, the wherein length of structural member die cavity on die cavity cross section
L1, thickness are d1, and the length of functor die cavity is l2, thickness is d2, the link position of structural member die cavity and functor die cavity
Angle is k, and l1:d1=1:0.05, l2:d2=1:0.01, k are 85-90 °;It was divided in the longitudinal direction in the die cavity of stock mould
Cross section and sizing section, the original width of changeover portion is l3, and the width of the final width of changeover portion and sizing section is l4, transition
Section length be a, sizing section length be b, l3:l4 be 2~2.5, a:b be 1:32~35;It is provided with stock mould and type
The parallel cooling water channel in chamber;Lubri-cating-water groove is provided with stock mould, lubri-cating-water groove is arranged perpendicular to the die cavity of stock mould, and lubricates
Tank is connected with the die cavity of stock mould.
The cooling water channel of stock mould to relation between the thickness d of c and die cavity corresponding points for the die cavity for c:d be 4~
5.Hypertelorism or section bar cooling excessively closely can be made not or excessive, leads to section bar depanning size l4 to change, finally exceeds wind
Road backplate demand size.
Described cooling water channel is divided into 3 groups, and first group of cooling water channel is 3, the cross-sectional area of each of which cooling water channel
It is s1, second group of cooling water channel is 3, the cross-sectional area of each of which cooling water channel is s2, the 3rd group of cooling water channel is 2
Individual, each of which cooling water channel cross-sectional area is s3, s1:s2:s3=1.2:1.1:1.Ratio is excessive or too small all can make not
Uneven with the cooling between position, lead to product size inharmonious.
The product that the present invention is directed to is air duct protection plate, air duct protection plate by shape model cavity during because it is not complete
Full cooling and shaping, can lead to deform in the presence of by mold cavity surface frictional force, or even can not pass through die cavity, blocking is logical
Road, so devising lubri-cating-water groove in mold cavity surface, such mode can form very thin one layer lubricating water film in Surface of profile,
Lubricating water film, while playing lubrication to section bar, also plays a part polishing to Surface of profile, makes Surface of profile thinner
Greasy, reduce surface roughness.
Due to employing technique scheme, compared with prior art, the present invention increases transition using in stock mould front end
The structure of section, is that the import of stock mould increases a guiding size, and adds lubri-cating-water groove to carry out the air duct protection plate to soft-hard coextrusion
Section bar carries out cooling and shaping.Such stock mould can make product have the advantages that preferable surface quality, dimensionally stable, very applicable
In coextrusion processing.And present configuration is simple, with low cost, easily implement, using effect is good.
Brief description,
Accompanying drawing 1 is the structural representation of the present invention;
Accompanying drawing 2 is the cross-sectional view of the stock mould of the present invention;
Accompanying drawing 3 is the structural representation of the lubri-cating-water groove of the present invention;
Accompanying drawing 4 is the cross-sectional view of the die cavity of stock mould of the present invention.
Specific embodiment,
Embodiments of the invention: soft-hard coextrusion sealing uses air duct protection plate shaping equipment, including stock mould 1, the type of stock mould 1
Be the functor die cavity of rectilinear structural member die cavity and arc line shaped on the cross section of chamber, wherein length l1 of structural member die cavity,
Thickness is d1, and the length of functor die cavity is l2, thickness is d2, becomes the ratio r:r of shaper radius r and product requirement radius r
=1.04:1, structural member die cavity is k with the angle of the link position of functor die cavity, l1:d1=1:0.05, l2:d2=1:0.01, k
For 85-90 °;Be divided into changeover portion and sizing section in the die cavity of stock mould 1, the original width of changeover portion is l3, changeover portion final
The width of width and sizing section is l4, and the length of changeover portion is a, sizing section length be b, l3:l4 is 2.4, a:b
Consider that the air duct protection plate after cooling also may proceed to shrink for 1:34(, thus l2 requires than section bar size amplification 2%~
3%);It is provided with the cooling water channel 2 parallel with die cavity in stock mould 1, cooling water channel 2 is divided into 3 groups, first group of cooling water channel 2 is 3
Individual, each of which cooling water channel 2 cross-sectional area is s1, and second group of cooling water channel 2 is 3, each of which cooling water channel 2
Cross-sectional area is s2, the 3rd group of cooling water channel 2 is 2, the cross-sectional area of each of which cooling water channel 2 is s3, s1:s2:
s3=1.2:1.1:1;Lubri-cating-water groove 3 is provided with stock mould 1, lubri-cating-water groove 3 is arranged perpendicular to the die cavity of stock mould 1, and lubricates
Tank 3 is connected with the die cavity of stock mould 1;The cooling water channel 2 of stock mould 1 arrive die cavity the thickness d apart from c and die cavity corresponding points it
Between relation for c:d be 4~5.
As shown in figure 3, on functor die cavity top, apart from die cavity import x(x=2/3a, the 2/3 of changeover portion) position is opened
If lubri-cating-water groove 3, lubri-cating-water groove 3 width be more than product width, front four certain distance be respectively 10 mm, 20 mm, 10 mm and
20 mm, are subsequently evenly arranged tank with 20mm spacing, and first five tank has only been used in functor die cavity bottom, and spacing is respectively 10
Mm, 20 mm, 10 mm and 20 mm, the lubri-cating-water groove of structural member die cavity adopts same structure, because of its hardness reason, only need to be
Outer surface adds lubri-cating-water groove, and spacing is consistent with functor die cavity upper design.
From the soft or hard section bar air duct protection plate of extrusion neck ring mold extrusion, by draw, by being the stock mould 1 of embodiment,
Pass through bosh again, then by traction machine travel to subsequent processing.During by stock mould 1, stock mould 1 is to soft or hard type
Three effects of material air duct protection plate work simultaneously: one is that stretching leads to change in size, makes profile size by extruding change in size
To l4;Two is that the lubricating water film that lubri-cating-water groove 3 is formed guarantees surface lubrication, improves section bar and passes through the smoothness of model cavity of shaping,
Polishing is played a part to Surface of profile simultaneously, reduce the roughness of Surface of profile;Three is to fixed by three groups of cooling water channels 2
Pattern is lowered the temperature it is ensured that stock mould chilling temperature in cross-sectional direction and length direction is uniform, so that it is guaranteed that passing through it
In the cooling of soft-hard coextrusion section bar uniformly.Finally, the air duct protection plate out by stock mould, then by under entrance in the presence of traction
One operation.