CN101279509A - One-step extrusion molding steel plastic composition pipe headpiece and material flow distributing method - Google Patents
One-step extrusion molding steel plastic composition pipe headpiece and material flow distributing method Download PDFInfo
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- CN101279509A CN101279509A CNA2008100366544A CN200810036654A CN101279509A CN 101279509 A CN101279509 A CN 101279509A CN A2008100366544 A CNA2008100366544 A CN A2008100366544A CN 200810036654 A CN200810036654 A CN 200810036654A CN 101279509 A CN101279509 A CN 101279509A
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Abstract
The invention relates to the technical field of an extruder head in an extrusion molding device, in particular to a one-step extrusion steel-plastic composite pipe machine head mainly applied to an extrusion head device for steel-plastic composite pipe of the enhancement layer and a material flow distribution method. The device at least comprises a die, a shunt, a partition plate, an internal layer shunt set, a floating core, etc.; and various components are combined into a symmetric type distribution channel integral machine head having a double-chamber tandem structure. In the method, the distribution of the material flow is realized through components such as a subchannel, a central shunting ring, an outlet, an unloading groove, etc., in the machine head, and the related technical problems of how to employ the double-chamber tandem structure in the machine head, etc. The invention has the positive effects that: the die of the invention has a double-chamber design in the machine head to ensure the firmness and continuity of the internal layer material; the invention is provided with two groups of subchannels with flow adjustable to ensure a uniform circumferential pressure of the material flow so as to reach the balance of the distribution of the flow material. The invention has the advantages of convenient use, continuous production and strong economy, etc.
Description
Technical field
The present invention relates to the extruder head field in the extrusion equipment, outstanding a kind of steel-plastic composite pipe extruder head device one one-step extrusion molding steel plastic composition pipe head and materials flow distribution method thereof that is mainly used in enhancement layer of purport.
Background technology
Metal can effectively combine the two advantage with the complex technique of plastics, produces high economic benefit.For example strengthen aspect the research and development at plastic conduit at present, occurred PAP, apply a collection of novel tubes such as copper pipe.Steel-plastics composite pipe is the novel metal enhancement mode compound pipeline complex pipeline that occurs in the recent period, and its structure is plastics for the tube wall ectonexine, and the centre accompanies the sandwich structure of a steel lining.The adding of steel backing layer can effectively improve the bearing capacity and the rigidity of tubing, can replace steel pipe and do the use of building pressure-bearing standpipe, because of the internal layer that contacts with water is a plastic material, has conventional advantages such as common plastics tubing is nontoxic, pollution-free, corrosion-resistant simultaneously.Current this class pipeline two step even three-step approach moulding process that adopt more: coated metal level and skin behind the moulding inner plastic parison, or at metal level inside and outside wall moulding plastics layer, technology is complicated, and can't produce continuously.
The continuous production that patent 02117105.X moulds pipe for steel provides a thinking preferably, but does not provide effective Die Design.Patent 02112575.9 has provided the better simply Die Design of a kind of structure, thinks by analysis, and its right-angle handpiece structure annular runner partial design difficulty of processing is higher, easily causes materials flow hoop skewness; In addition, interior layered material must enter steel duct by the hole on " perforation steel pipe ", and resistance is bigger, and ectonexine materials flow amount is uncontrollable, causes the ectonexine materials flow moving asynchronous, can't guarantee internal layer material compacting, continuous.
Summary of the invention
In order to overcome above-mentioned weak point, it is the steel-plastic composite pipe extruder head of enhancement layer with hole pattern steel lining (steel mesh pipe) that main purpose of the present invention aims to provide a kind of, wherein the hole pattern steel lining is positioned at the tube wall middle part, the shaping pipe surfaces externally and internally is plastic layer, and by designing the materials flow distribution method of a cover runner system, both had two groups of runners that flow is adjustable, guaranteed again that materials flow distributed a balanced one-step extrusion molding steel plastic composition pipe head and materials flow distribution method thereof.
The technical problem to be solved in the present invention is: mainly solve head inside and how to adopt dual cavity in-line configuration problem; Solve and how to have two groups of runner problems that flow is adjustable; Solve the concentricity problem that how to guarantee core and steel mesh pipe; Solve how to guarantee that the materials flow circumferential pressure is even, make it to reach the relevant technologies problems such as harmony that materials flow distributes.
The technical solution adopted for the present invention to solve the technical problems is: this device comprises at least: mouthful mould, mouthful mold pressing lid, co-extrusion pressing plate, co-extrusion flange, shunting cover, current divider, cutoff board, cover, internal layer shunting cover, rear pressing cover, floating-type core and prolongation cover in stream, the symmetric form that each parts is combined as the dual cavity in-line configuration distributes the whole head of runner, wherein:
A bite mould is fixing by mouth mold pressing lid, and the co-extrusion pressing plate is provided with screw and adjusts a mouthful mould concentricity, and the co-extrusion flange is fixed by the co-extrusion pressing plate;
One cutoff board center is inlaid with cover in stream, overlaps support steel mesh pipe in stream, and and the steel mesh pipe between be concentric structure, the steel mesh pipe box is on floating-type core; Outer shunting cover and internal layer shunting cover lay respectively at the both sides of cutoff board, and runner shape, size and distributed architecture that outer shunting cover and internal layer shunting put are in full accord, and runner exit is respectively towards two chambers, and two runners inlet inserts current divider; Tail end at internal layer shunting cover is equipped with rear pressing cover, and aperture and steel mesh external diameter of pipe are complementary on it, and floating-type core afterbody external diameter and steel mesh bore are complementary;
The terminal installation of floating-type core prolongs cover, and the axial location of floating-type core is arranged in head all the time, and the tail end chamfering of rear pressing cover centre bore edge and floating-type core is towards inner-cavity structure.
The shunting cover of a described one-step extrusion molding steel plastic composition pipe head comprises: materials flow inlet, runner, central flow splitter, discharging opening and unload the power groove, wherein:
Materials flow inlet, runner, central flow splitter, discharging opening and the power groove of unloading are arranged on outer shunting and put, one end of materials flow inlet is connected with current divider, the other end is connected with runner, and runner is terminal to be connected with central flow splitter, and central flow splitter is connected with discharging opening.
The current divider of a described one-step extrusion molding steel plastic composition pipe head has two arms, one in two arms is provided with flow control device, and be provided with a cock and regulate wherein one tunnel flow size, the materials flow that is divided into two-way is the syndeton of symmetric design because of current divider, be the transposing installation direction, one road arm of Flow-rate adjustment inserts in the runner of internal layer shunting cover or outer shunting cover.
The steel mesh pipe of a described one-step extrusion molding steel plastic composition pipe head is the steel-plastic composite pipe extruder head of enhancement layer, and wherein the hole pattern steel lining is positioned at shaping pipe tube wall middle part, and the shaping pipe surfaces externally and internally is plastic layer.
The runner of a described one-step extrusion molding steel plastic composition pipe head is arranged with the main runner of half circular arc type and the secondary runner of two quadrant cambers, and materials flow is equated by inlet to outlet distance; The UNICOM position of materials flow inlet and runner is positioned at the arc top of main runner semicircle camber, and the secondary runner is concentric opposed with main runner, and radius is less than the radius of main runner, and its arc pushes up and aligns with main runner end points respectively; Between main runner and two secondary runners by the identical straight channel UNICOM of two segment length, the master of an end UNICOM runner path end points, the arc top of other end UNICOM secondary runner path arc;
The secondary runner is equipped with a central flow splitter with one heart, its path shape is round, radius is less than the radius of secondary runner, flow splitter passes through four straight channel UNICOMs that length is identical with the secondary runner, the flow splitter radial direction is prolonged in its path respectively and by secondary runner end points, materials flow divides four the tunnel evenly to be full of central flow splitter.
The discharging opening of a described one-step extrusion molding steel plastic composition pipe head is evenly distributed on the central flow splitter circumference, and quantity is at least 8, an end and central flow splitter UNICOM, and the other end is connected with each chamber respectively.
A kind of materials flow distribution method of an one-step extrusion molding steel plastic composition pipe head, this method is by the mouth mould in the head, mouthful mold pressing lid, co-extrusion pressing plate, co-extrusion flange, outer shunting cover, current divider, cutoff board, cover, internal layer are shunted cover, rear pressing cover, floating-type core, prolongation cover, steel mesh pipe, materials flow inlet, runner, central flow splitter, discharging opening and unloaded the power groove in stream, the materials flow that realizes head distributes, and the concrete job step that this materials flow distributes is:
Step 1. feed
The steel mesh pipe is rolled and welds on steel mesh pipe moulding welding machine by the hole pattern steel band, and the steel mesh pipe of forming is entered by head one end, extruder by the side to the head feed;
The materials flow of being sent into head by extruder is entered the runner system of outer shunting cover and internal layer shunting cover respectively by distributor;
Step 2. is fixed on the rolling machine
The core afterbody is equipped with a pilot sleeve, be to keep the horizontal level of core in head, and pilot sleeve is by the draw bar tractive, and this draw bar passes the good steel mesh pipe of welding, passes from the part of steel mesh pipe not closed welding still, is fixed on the rolling machine;
Step 3. enters the runner system
In runner, materials flow is equally divided into two-way earlier and enters the secondary runner in main runner;
Materials flow is divided into four the tunnel and enters central flow splitter in the secondary runner;
Step 4. enters each chamber
After 2 mean allocation,, after the 3rd mean allocation, enter each chamber by being arranged in 8 circumferential discharging openings of central flow splitter;
The charging of step 5. internal layer
After the steel mesh pipe penetrated head, first chamber of prolonging its direction of motion was primarily aimed at the internal layer charging, and it is closely knit that materials flow enters its inner filling via the hole on the steel mesh pipe;
Travel forward with the steel mesh pipe, it is outer to internal layer feed supplement pressurize and formation to enter second chamber;
Step 7. composite molding
In head the steel mesh pipe with enter the plastics of each chamber compound after, after machine head port mould, floating-type core moulding, enter the cooling and shaping case;
The harmony that step 8. materials flow distributes
Distributor can be regulated the flow proportional of two chamber materials flows, and the runner inlet is in full accord to the distance of each outlet, finishes the harmony that materials flow distributes.
The invention has the beneficial effects as follows: head of the present invention inside is two chamber design, and two chambeies form steel respectively and mould inner tube layer and skin; Both can there be positioning action middle the partition to the hole pattern steel lining, can increase the materials flow pressure of internal layer feed chamber again, guaranteed that the internal layer material compacting is continuous; Have two groups of runners that flow is adjustable, respectively feed is carried out in two chambeies; Head charging aperture place is provided with distributor, makes the assignment of traffic of two groups of runners adjustable, is easy to guarantee consistent with the mobile synchronism of pressure of ectonexine materials flow; Each runner enters the mouth to the head each chamber exit apart from unanimity by materials flow, and hoop evenly distributes, and guarantees that the materials flow circumferential pressure is even; Have a unsteady core, the afterbody tractive is fixed.Core is provided with streamlined alignment pin, can guarantee the concentricity of core and steel mesh pipe; Have easy to use, can produce continuously, advantage such as economy is strong.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Accompanying drawing 1 is the integrally-built longitudinal sectional drawing of the present invention;
Accompanying drawing 2 is shunted the structural representation of cover for the present invention;
Label declaration in the accompanying drawing:
1-mouth mould;
2-mouth mold pressing lid;
3-co-extrusion pressing plate;
4-co-extrusion flange;
5-shunts cover;
The 6-current divider;
The 7-cutoff board;
8-is cover in stream;
9-internal layer shunting cover;
The 10-rear pressing cover;
The 11-floating-type core;
13-steel mesh pipe;
14-materials flow inlet;
The 15-runner;
16-central authorities flow splitter;
The 17-discharging opening;
18-unloads the power groove;
The specific embodiment
See also shown in the accompanying drawing 1,2, apparatus of the present invention comprise at least: mouthful mould 1, mouthful mold pressing lid 2, co-extrusion pressing plate 3, co-extrusion flange 4, shunting cover 5, current divider 6, cutoff board 7, cover 8, internal layer shunting cover 9, rear pressing cover 10, floating-type core 11 and prolong and overlap 12 in stream, the symmetric form that each parts is combined as the dual cavity in-line configuration distributes the whole head of runner, wherein:
A bite mould 1 is fixing by mouth mold pressing lid 2, and co-extrusion pressing plate 3 is provided with screw and adjusts a mouthful mould concentricity, and co-extrusion flange 4 is fixing by co-extrusion pressing plate 3;
One cutoff board, 7 centers are inlaid with cover 8 in stream, overlap 8 support steel mesh pipes 13 in stream, and and steel mesh pipe 13 between be concentric structure, steel mesh pipe 13 is enclosed within on the floating-type core 11; Outer shunting cover 5 and internal layer shunting cover 9 lay respectively at the both sides of cutoff board 7, and runner shape, size and distributed architecture on outer shunting cover 5 and the internal layer shunting cover 9 are in full accord, and runner exit is respectively towards two chambers, and two runners inlet inserts current divider 6; Tail end at internal layer shunting cover 9 is equipped with rear pressing cover 10, and aperture and steel mesh pipe 13 external diameters are complementary on it, and floating-type core 11 afterbody external diameters and steel mesh pipe 13 internal diameters are complementary;
Floating-type core 11 terminal installations prolong cover 12, and the axial location of floating-type core 11 is arranged in head all the time, and the tail end chamfering of rear pressing cover 10 centre bore edges and floating-type core 11 is towards inner-cavity structure.
The shunting of described one-step extrusion molding steel plastic composition pipe head cover 5 comprises: materials flow inlet 14, runner 15, central flow splitter 16, discharging opening 17 and unload power groove 18, wherein: materials flow inlet 14, runner 15, central flow splitter 16, discharging opening 17 and unload power groove 18 and be arranged on the outer shunting cover 5, one end of materials flow inlet 14 is connected with current divider 6, the other end is connected with runner 15, runner 15 ends are connected with central flow splitter 16, and central flow splitter 16 is connected with discharging opening 17.
The current divider 6 of a described one-step extrusion molding steel plastic composition pipe head has two arms, one in two arms is provided with flow control device, and be provided with a cock and regulate wherein one tunnel flow size, the materials flow that is divided into two-way is the syndeton of symmetric design because of current divider 6, be the transposing installation direction, one road arm of Flow-rate adjustment inserts in the runner of internal layer shunting cover 9 or outer shunting cover 5.
The steel mesh pipe 13 of a described one-step extrusion molding steel plastic composition pipe head is the steel-plastic composite pipe extruder head of enhancement layer, and wherein the hole pattern steel lining is positioned at shaping pipe tube wall middle part, and the shaping pipe surfaces externally and internally is plastic layer.
The runner 15 of a described one-step extrusion molding steel plastic composition pipe head is arranged with the main runner of half circular arc type and the secondary runner of two quadrant cambers, and materials flow is equated by inlet to outlet distance; The UNICOM position of materials flow inlet 14 and runner 15 is positioned at the arc top of main runner semicircle camber, and the secondary runner is concentric opposed with main runner, and radius is less than the radius of main runner, and its arc pushes up and aligns with main runner end points respectively; Between main runner and two secondary runners by the identical straight channel UNICOM of two segment length, the master of an end UNICOM runner path end points, the arc top of other end UNICOM secondary runner path arc;
The secondary runner is equipped with a central flow splitter 16 with one heart, its path shape is round, radius is less than the radius of secondary runner, flow splitter passes through four straight channel UNICOMs that length is identical with the secondary runner, the flow splitter radial direction is prolonged in its path respectively and by secondary runner end points, materials flow divides four the tunnel evenly to be full of central flow splitter 16.
The discharging opening 17 of a described one-step extrusion molding steel plastic composition pipe head is evenly distributed on central flow splitter 16 circumference, and quantity is at least 8, an end and central flow splitter 16 UNICOMs, and the other end is connected with each chamber respectively.
A kind of materials flow distribution method of an one-step extrusion molding steel plastic composition pipe head, this method by the mouth mould 1 in the head, mouthful mold pressing lid 2, co-extrusion pressing plate 3, co-extrusion flange 4, outer shunting cover 5, current divider 6, cutoff board 7, in stream cover 8, internal layer shunting cover 9, rear pressing cover 10, floating-type core 11, prolong that cover 12, steel mesh pipe 13, materials flow enter the mouth 14, runner 15, central flow splitter 16, discharging opening 17 and unload power groove 18, the materials flow that realizes head distributes, and the concrete job step that this materials flow distributes is:
Step 1. feed
Steel mesh pipe 13 is rolled and welds on steel mesh pipe moulding welding machine by the hole pattern steel band, and the steel mesh pipe 13 of forming is entered by head one end, extruder by the side to the head feed;
The materials flow of being sent into head by extruder is entered the runner system of outer shunting cover 5 and internal layer shunting cover 9 respectively by distributor;
Step 2. is fixed on the rolling machine
The core afterbody is equipped with a pilot sleeve, be to keep the horizontal level of core in head, and pilot sleeve is by the draw bar tractive, and this draw bar passes the good steel mesh pipe 13 of welding, passes from the part of steel mesh pipe 13 not closed welding still, is fixed on the rolling machine;
Step 3. enters runner 15 systems
In runner 15, materials flow is equally divided into two-way earlier and enters the secondary runner in main runner;
Materials flow is divided into four the tunnel and enters central flow splitter 16 in the secondary runner;
Step 4. enters each chamber
After 2 mean allocation,, after the 3rd mean allocation, enter each chamber by being arranged in 8 circumferential discharging openings 17 of central flow splitter 16;
The charging of step 5. internal layer
After steel mesh pipe 13 penetrated head, first chamber of prolonging its direction of motion was primarily aimed at the internal layer charging, and it is closely knit that materials flow enters its inner filling via the hole on the steel mesh pipe 13;
Travel forward with steel mesh pipe 13, it is outer to internal layer feed supplement pressurize and formation to enter second chamber;
Step 7. composite molding
In head steel mesh pipe 13 with the plastics that enter each chamber compound after, after machine head port mould 1, floating-type core 11 moulding, enter the cooling and shaping case;
The harmony that step 8. materials flow distributes
Distributor can be regulated the flow proportional of two chamber materials flows, and the runner inlet is in full accord to the distance of each outlet, finishes the harmony that materials flow distributes.
Design feature of the present invention is:
1). two chamber design, two chambeies form steel respectively and mould inner tube layer and skin.Both can there be positioning action middle the partition to the hole pattern steel lining, can increase the materials flow pressure of internal layer feed chamber again, guaranteed that the internal layer material compacting is continuous.
2). have two groups of runners that flow is adjustable, respectively feed is carried out in two chambeies.
3). head charging aperture place is provided with distributor, makes the assignment of traffic of two groups of runners adjustable, is easy to guarantee consistent with the mobile synchronism of pressure of ectonexine materials flow.
4). each runner enters the mouth to the head each chamber exit apart from unanimity by materials flow, and hoop evenly distributes, and guarantees that the materials flow circumferential pressure is even.
5). have a unsteady core, the afterbody tractive is fixed.Core is provided with streamlined alignment pin, can guarantee the concentricity of core and steel mesh pipe.
Operation principle of the present invention is:
Used steel mesh pipe 13 is rolled on rolling machine and is welded by the hole pattern steel band, and the steel mesh pipe 13 of forming is entered by head one end, and to the head feed, steel mesh pipe and plastics composite molding enter the cooling and shaping case through machine head port mould 1, core to extruder in head by the side.Because of the particularity of institute's shaping pipe structure, core is in suspended state in head, and for guaranteeing concentricity, its stage casing is provided with alignment pin.The core afterbody is equipped with a pilot sleeve, plays guiding and counterweight, and for keeping the horizontal level of core in head, pilot sleeve is by the draw bar tractive.This draw bar passes the good steel mesh pipe 13 of welding, passes from the part of steel mesh pipe 13 not closed welding still, is fixed on the rolling machine.
The dual cavity in-line configuration has been adopted in head inside, and after steel mesh pipe 13 penetrated head, first chamber of prolonging its direction of motion was primarily aimed at the internal layer charging, and it is closely knit that materials flow enters its inner filling via the hole on the steel mesh pipe.Travel forward with steel mesh pipe 13 afterwards and enter second chamber internal layer feed supplement pressurize and formation skin.
Because of extruder is the side direction feed, the present invention is the harmony of assurance two chamber materials flow pressure and the uniformity of the circumferential feed of each chamber, an ad hoc cover runner 15 systems that counted.The materials flow of being sent into head by extruder enters runner 15 systems of two chambers respectively by distributor, after 3 mean allocation, enters each chamber by equal portion in 8 circumferential holes of each chamber.Distributor can be regulated the flow proportional of two chamber materials flows, and the runner inlet is in full accord to the distance of each outlet, has well guaranteed the harmony that materials flow distributes.
See also shown in the accompanying drawing 1, cutoff board is 7 among Fig. 1, and the centre is inlaid with cover 8 in stream, and both divisible two chambers of its effect increase the pressure of back cavity to the internal layer charging, can support steel mesh pipe 13 again, keep its concentricity.Outer shunting cover 5 and internal layer shunting cover 9 lay respectively at cutoff board 7 both sides, runner shape, the size on it and distribute in full accordly, and runner exit is respectively towards two chambers.Two runners inlet inserts current divider 6, owing to adopt symmetric design, so the direction of current divider 6 can be changed.Generally speaking, need pass hole on the steel mesh pipe 13 because of the internal layer charging, resistance is bigger, so tackle outer current limliting; Tail end at internal layer shunting cover 9 is equipped with rear pressing cover 10, and on it match with the steel mesh external diameter of pipe in aperture, and floating-type core 11 afterbody external diameters match with steel mesh pipe 13 internal diameters; Floating-type core 11 terminal installations prolong cover 12, have the effect of leading with counterweight concurrently; Prolongation cover 12 tail ends connect stayed pole and are fixed on the steel mesh pipe bushing machine, are used for keeping the axial location of floating-type core 11 to be positioned at head all the time.Because rear pressing cover 10 centre bore edges and floating-type core 11 tail end chamferings are towards inner chamber, the steel mesh pipe travels forward during work, can prevent effectively that tail end from escaping to expect; The co-extrusion flange is 4, is used for co-extrusion tubing colour code line, and is fixing by co-extrusion pressing plate 3; The mouth mould is 1, and is fixing by mouth mold pressing lid 2, and mouthful mould concentricity is by the screw adjustment on the co-extrusion pressing plate 3.
See also shown in the accompanying drawing 2, among the shunting cover figure shown in Figure 2, the materials flow inlet is 14, and extruder extruded stock stream enters runner 15 thus through current divider 6; Materials flow enters central flow splitter 16 after runner two sub-distribution, enter chamber by 8 equally distributed discharging openings 17 at last; 18 for unloading the power groove among Fig. 2, can make the timing of shunting suit be easy to compress.As seen, runner is a symmetric design, and materials flow equates that by inlet to outlet distance discharging opening evenly distributes, and has guaranteed that materials flow prolongs the hoop uniformity, has avoided right-angle handpiece materials flow hoop problem of uneven distribution.
At first enter current divider via the materials flow behind the extruder fusion plastification, be divided into 2 the tunnel by two arms in the current divider.One in this two arm is provided with flow control device, can regulate wherein one tunnel flow size by a cock.The materials flow that is divided into two-way has been taked symmetric design because of the syndeton of current divider, can the road arm that possess Flow-rate adjustment be inserted in the runner of internal layer shunting cover or outer shunting cover by the transposing installation direction.
Because of two cover runners mirror image each other, following materials flow is described in the example that is assigned as that the internal layer shunting puts in the runner: after materials flow enters the shunting cover, be the main runner of semicircle camber by runner inlet access path.For guaranteeing the mean allocation materials flow, the runner inlet is positioned at the arc top of semicircle camber.Materials flow will arrive its two ends simultaneously in being full of the process of main runner.Concentric its path type shape is respectively the quadrant camber to being equipped with two secondary runners that radius is slightly little with main runner, and aligns with main runner end points respectively in its arc top.Between main runner and secondary runner by the identical straight channel UNICOM of two segment length, i.e. the master of an end UNICOM runner path end points, the arc top of an end UNICOM secondary runner path arc.Like this, the materials flow that is full of main runner will be full of two secondary runners gradually by two sections straight channel, and arrive four end points of secondary runner simultaneously.With the concentric flow splitter that is equipped with of secondary runner, its path shape is round, and radius is little than the secondary runner.Flow splitter passes through four straight channel UNICOMs that length is identical with the secondary runner, and its path is prolonged the flow splitter radial direction respectively and passed through secondary runner end points.Therefore, materials flow will divide four the tunnel evenly to be full of flow splitter.On flow splitter, be evenly equipped with the outlet of eight runners, its in twos with four straight channel symmetries of UNICOM's flow splitter, will evenly be divided into eight the tunnel in the materials flow flow splitter and be entered the moulding chamber.
Claims (7)
1, an a kind of one-step extrusion molding steel plastic composition pipe head, it is characterized in that: this device comprises at least: (5), current divider (6), cutoff board (7), cover (8), internal layer shunting cover (9), rear pressing cover (10), floating-type core (11) and prolongation cover (12) in stream are overlapped in mouthful mould (1), mouthful mold pressing lid (2), co-extrusion pressing plate (3), co-extrusion flange (4), shunting, the symmetric form that each parts is combined as the dual cavity in-line configuration distributes the whole head of runner, wherein:
A bite mould (1) is fixing by mouth mold pressing lid (2), and co-extrusion pressing plate (3) is provided with screw and adjusts a mouthful mould concentricity, and co-extrusion flange (4) is fixing by co-extrusion pressing plate (3);
One cutoff board (7) center is inlaid with cover (8) in stream, overlaps (8) support steel mesh pipe (13) in stream, and and steel mesh pipe (13) between be concentric structure, steel mesh pipe (13) is enclosed within on the floating-type core (11); Outer shunting cover (5) and internal layer shunting cover (9) lay respectively at the both sides of cutoff board (7), runner shape, size and distributed architecture on outer shunting cover (5) and the internal layer shunting cover (9) are in full accord, runner exit is respectively towards two chambers, and two runners inlet inserts current divider (6); Tail end at internal layer shunting cover (9) is equipped with rear pressing cover (10), and aperture and steel mesh pipe (13) external diameter are complementary on it, and floating-type core (11) afterbody external diameter and steel mesh pipe (13) internal diameter are complementary;
The terminal installation of floating-type core (11) prolongs cover (12), and the axial location of floating-type core (11) is arranged in head all the time, and the tail end chamfering of rear pressing cover (10) centre bore edge and floating-type core (11) is towards inner-cavity structure.
2, an one-step extrusion molding steel plastic composition pipe head according to claim 1, it is characterized in that: described shunting cover (5) comprising: materials flow inlet (14), runner (15), central flow splitter (16), discharging opening (17) and unload power groove (18), wherein:
Materials flow inlet (14), runner (15), central flow splitter (16), discharging opening (17) and unload power groove (18) and be arranged on outer shunting and overlap on (5), one end of materials flow inlet (14) is connected with current divider (6), the other end is connected with runner (15), runner (15) is terminal to be connected with central flow splitter (16), and central flow splitter (16) is connected with discharging opening (17).
3, an one-step extrusion molding steel plastic composition pipe head according to claim 1, it is characterized in that: described current divider (6) has two arms, one in two arms is provided with flow control device, and be provided with a cock and regulate wherein one tunnel flow size, the materials flow that is divided into two-way is the syndeton of symmetric design because of current divider (6), be the transposing installation direction, one road arm of Flow-rate adjustment inserts in the runner of internal layer shunting cover (9) or outer shunting cover (5).
4, an one-step extrusion molding steel plastic composition pipe head according to claim 1, it is characterized in that: described steel mesh pipe (13) is the steel-plastic composite pipe extruder head of enhancement layer, wherein the hole pattern steel lining is positioned at shaping pipe tube wall middle part, and the shaping pipe surfaces externally and internally is plastic layer.
5, an one-step extrusion molding steel plastic composition pipe head according to claim 2, it is characterized in that: described runner (15) is arranged with the main runner of half circular arc type and the secondary runner of two quadrant cambers, and materials flow is equated by inlet to outlet distance; The UNICOM position of materials flow inlet (14) and runner (15) is positioned at the arc top of main runner semicircle camber, and the secondary runner is concentric opposed with main runner, and radius is less than the radius of main runner, and its arc pushes up and aligns with main runner end points respectively; Between main runner and two secondary runners by the identical straight channel UNICOM of two segment length, the master of an end UNICOM runner path end points, the arc top of other end UNICOM secondary runner path arc;
The secondary runner is equipped with a central flow splitter (16) with one heart, its path shape is round, radius is less than the radius of secondary runner, flow splitter passes through four straight channel UNICOMs that length is identical with the secondary runner, the flow splitter radial direction is prolonged in its path respectively and by secondary runner end points, materials flow divides four the tunnel evenly to be full of central flow splitter (16).
6, an one-step extrusion molding steel plastic composition pipe head according to claim 2, it is characterized in that: described discharging opening (17) is evenly distributed on central flow splitter (16) circumference, quantity is at least 8, an end and central flow splitter (16) UNICOM, and the other end is connected with each chamber respectively.
7, a kind of materials flow distribution method of an one-step extrusion molding steel plastic composition pipe head, it is characterized in that: this method is by the mouth mould (1) in the head, mouth mold pressing lid (2), co-extrusion pressing plate (3), co-extrusion flange (4), outer shunting cover (5), current divider (6), cutoff board (7), cover (8) in stream, internal layer shunting cover (9), rear pressing cover (10), floating-type core (11), prolong cover (12), steel mesh pipe (13), materials flow inlet (14), runner (15), central authorities' flow splitter (16), discharging opening (17) and unload power groove (18), the materials flow that realizes head distributes, and the concrete job step that this materials flow distributes is:
Step 1. feed
Steel mesh pipe (13) is rolled and welds on steel mesh pipe moulding welding machine by the hole pattern steel band, and the steel mesh pipe (13) of forming is entered by head one end, extruder by the side to the head feed;
The materials flow of being sent into head by extruder is entered the runner system of outer shunting cover (5) and internal layer shunting cover (9) respectively by distributor;
Step 2. is fixed on the rolling machine
The core afterbody is equipped with a pilot sleeve, be to keep the horizontal level of core in head, and pilot sleeve is by the draw bar tractive, and this draw bar passes the good steel mesh pipe (13) of welding, passes from the part of steel mesh pipe (13) not closed welding still, is fixed on the rolling machine;
Step 3. enters runner (15) system
In runner (15), materials flow is equally divided into two-way earlier and enters the secondary runner in main runner;
Materials flow is divided into four the tunnel and enters central flow splitter (16) in the secondary runner;
Step 4. enters each chamber
After 2 mean allocation,, after the 3rd mean allocation, enter each chamber by being arranged in circumferential 8 discharging openings (17) of central flow splitter (16);
The charging of step 5. internal layer
After steel mesh pipe (13) penetrated head, first chamber of prolonging its direction of motion was primarily aimed at the internal layer charging, and it is closely knit that materials flow enters its inner filling via the hole on the steel mesh pipe (13);
Step 6. feed supplement pressurize forms skin
Travel forward with steel mesh pipe (13), it is outer to internal layer feed supplement pressurize and formation to enter second chamber;
Step 7. composite molding
In head steel mesh pipe (13) with enter the plastics of each chamber compound after, after machine head port mould (1), floating-type core (11) moulding, enter the cooling and shaping case;
The harmony that step 8. materials flow distributes
Distributor can be regulated the flow proportional of two chamber materials flows, and the runner inlet is in full accord to the distance of each outlet, finishes the harmony that materials flow distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100366544A CN101279509B (en) | 2008-04-25 | 2008-04-25 | One-step extrusion molding steel plastic composition pipe headpiece and material flow distributing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100366544A CN101279509B (en) | 2008-04-25 | 2008-04-25 | One-step extrusion molding steel plastic composition pipe headpiece and material flow distributing method |
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| CN101279509A true CN101279509A (en) | 2008-10-08 |
| CN101279509B CN101279509B (en) | 2010-08-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111642441A (en) * | 2020-06-28 | 2020-09-11 | 广东联塑科技实业有限公司 | Sealed buoyancy tube and preparation mould thereof |
| CN113263760A (en) * | 2021-03-23 | 2021-08-17 | 菏泽三垒塑业股份有限公司 | Mesh steel belt polyethylene composite pipe and production method thereof |
-
2008
- 2008-04-25 CN CN2008100366544A patent/CN101279509B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111642441A (en) * | 2020-06-28 | 2020-09-11 | 广东联塑科技实业有限公司 | Sealed buoyancy tube and preparation mould thereof |
| CN113263760A (en) * | 2021-03-23 | 2021-08-17 | 菏泽三垒塑业股份有限公司 | Mesh steel belt polyethylene composite pipe and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101279509B (en) | 2010-08-18 |
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