CN101856677B

CN101856677B - Mold core

Info

Publication number: CN101856677B
Application number: CN201010165068A
Authority: CN
Inventors: 岳光明; 陈学模
Original assignee: Hefei Smarter Technology Co Ltd
Current assignee: Hefei Smarter Technology Group Corp
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2012-10-03
Anticipated expiration: 2030-04-30
Also published as: CN101856677A

Abstract

The invention relates to an element in continuous extrusion equipment, in particular to a mold core used in equipment capable of performing continuous extrusion molding on aluminum cylindrical tubes. A through hole is arranged in the mold core body along the anterio-posterior for cables to pass through, the rear section of the mold core is a cylindrical body, the front end of the cylindrical body is provided with a styloid rod with a smaller diameter, the front end of the styloid rod is provided with a valve plate, the peripheral outline of the valve plate is oval, the front face of the valve plate is cone-shaped, a small tube head extending forwards is arranged at the orifice of the through hole, the cylinder of the cylindrical body, which is adjacent to the styloid rod, is provided with two dustpan-shaped drainage holes which are arranged in a symmetric manner and are positioned at the rear part of the oval long shaft board of the valve plate, and the valve plate, the styloid rod and the drainage holes encircles into a cavity channel which is arranged in a mold seat, can accommodate flow materials and enables the flow materials to pass through. The mutual match of the shape, path and flow of the mold core enables aluminum liquid arriving at the pipe orifice of the small tube head to be even, thereby providing basic guarantee for obtaining aluminum tubes with even wall thickness.

Description

Core rod

Technical field

The present invention relates to the parts in a kind of continuous extrusion apparatus, the parts that use on specifically exactly can the equipment of continuous extrusion aluminium cylindrical tube.

Background technology

How realize at cable outerwrap insulation screen with the mode of armouring; What adopt during in view of armouring is that strip material is wrapped on cable bus or the heart yearn with oblique or spiral way; The situation of double-deck stack will appear in the position of overlap joint each other; The situation that became uneven appears at interval in screen layer along its length just must appear in whole screen layer, and this both had been unfavorable for processing, also waste material and can't realize all layer structures.In view of the defective that exists in the above-mentioned prior art; 05 month 22 days (International Publication days) in 2009 disclosed the patent application prospectus of the PCT/GB2008/003830 of a kind of " continuous extrusion apparatus "; Wherein disclose a kind of core, be used to provide the aluminium of continuous supply tubulose.Its concrete scheme is: many spaced-apart ring-shaped grooves (4) that circumferential arrangement is arranged on the wheel rim of the roller of gathering around referring to Fig. 1,2,3 continuous extruders (2); Having passage (10) to be arranged in each cannelure (4) radially on the arc mould (8) that is slidingly matched with roller (2) locates; Semifluid that roller (2) and arc mould (8) rolling friction is generated by passage (10) or flow-like aluminium are directed to the extrusion chamber (16) that mould seat (6) and Connection Block (9) surround; Extrusion chamber (16) extends to extrusion mandrel device (12) on every side; The thermoplastic aluminium inwardly arrives vestibule (48) through extrusion mandrel device (12) by passage (10) and locates, and is packaged on cable bus or the heart yearn through extrusion mandrel device (12) and the middle die orifice (44) of extrusion die die sleeve (42).Wherein principal character is: extrusion mandrel device (12) comprises leaf, a mushroom plug (28), and this plug (28) is arranged on the termination of the stem shape bar (30) in the extrusion chamber (16) with suspending shape.The passage (10) that adjacent a pair of discharge port (27) connects separately enters into an inside die cavity object (16) in the extrusion chamber; Stretch out forward from the termination of stem shape bar (30) at the back side (34) of the sheet lobe (32) of a pair of shaping; Outline part (36) and front are incorporated into a collar (38); The shaft shoulder (42) in groove (40) paripheral zone annular; Go up the extruding space (44) that forms an annular at extruding die body (20); (34), front (36) are to the independent distance of the collar (38) Yu the groove (40) of three-dimensional circular cone chimb shape to the back side from each arc discharge port (27), and this distance is to equate fully, and the extruded material skin friction resistance is fully consistent at lobate plug (28) on every side.In the such scheme; The bow-shaped structural of discharge port (27) is that one section groove that circumferentially is provided with extends the structure that is communicated with then vertically; Aluminium behind the thermoplastic will " the shape path arrives discharge port (27) and locates, so aluminium flow and the flow direction of discharge port (27) both sides be difficult to uniformity, and the aluminium flow of locating at the collar (38) and groove (40) like this is difficult to keep evenly with the flow direction; so aluminium became uneven that on cable bus or heart yearn, coats; will cause aluminum pipe SOL in the time of seriously, and have a strong impact on the quality of cage walls, and then influence cable or bus quality through one section like this.

Summary of the invention

The purpose of this invention is to provide the core rod that uses on a kind of continuous extrusion apparatus, be intended to improve the body even tube wall of extrusion modling, improve the quality of cable bus or heart yearn cage walls.

For realizing above-mentioned purpose; The present invention has adopted technical scheme: a kind of core rod, and the through hole that the confession cable that has fore-and-aft direction to open in the core rod body passes through, back segment are cylindrical body; It is characterized in that: the front end of cylindrical body has the less stem shape bar of diameter; The front end of stem shape bar has valve plate, and the peripheral profile of valve plate is oval, and the front of valve plate is a conicoid; Be positioned at place, through hole aperture the segment tube head that extends is forward arranged; Cylindrical body offers the draining hole of two dustpan shapes near symmetry on the cylinder of stem shape bar, and draining hole is positioned at the rear of the oval-shaped major axis plate face of valve plate, enclose between valve plate, stem shape bar and the draining hole be positioned at die holder hold and supply the cavity path that fluent material passes through.In the technique scheme; Offering through hole in the core rod body supplies cable to pass through; The core rod body is positioned at die holder, and the toroidal cavity that surrounds between core rod body and the die holder supplies the aluminium of fluid or semifluid shape to hold collection also to pass through, and draining hole adopts aluminium that the structure of dustpan shape is convenient to fluid or semifluid shape evenly to be transported to the back side of valve plate; Draining hole is symmetrical set two in addition; Like this, aluminium will send with charge free in time the valve plate back side around, be oval shape in view of the shape of valve plate has adopted elementary contour; Cooperatively interacting of shape, path and flow just makes that the aluminium liquid that arrives segment tube head mouth of pipe place is even like this, thereby is that the aluminum pipe that obtains uniform wall thickness provides basic guarantee.

Description of drawings

Fig. 1,2, the 3rd, the structural representation of prior art scheme;

Fig. 4 is a perspective view of the present invention;

Fig. 5,6,7 is respectively front view of the present invention, left view and vertical view;

Fig. 8,9 is respectively that A-A, B-B among Fig. 5 is to cutaway view;

Figure 10 is the perspective view of conical ring;

Figure 11 is a front view of the present invention;

Figure 12 is that A-A among Figure 11 is to cutaway view.

The specific embodiment

Like Fig. 4～9; Core rod comprises the through hole 11 that has front and back to pass through to the confession cable of opening in the core rod body 10; Back segment is a cylindrical body 12, and the front end of cylindrical body 12 has the less stem shape bar 13 of diameter, and the front end of stem shape bar 13 has valve plate 14; The peripheral profile of valve plate 14 is oval; The front of valve plate 14 is a conicoid 15, and being positioned at aperture, through hole 11 place has the segment tube head 16 that extends forward, and cylindrical body 12 offers the draining hole 17 of two dustpan shapes near symmetry on the cylinder of stem shape bar 13; Draining hole 17 is positioned at the rear of the oval-shaped major axis plate face of valve plate 14, enclose between valve plate 14, stem shape bar 13 and the draining hole 17 be positioned at die holder 20 hold and supply the cavity path that fluent material passes through.

The diameter of above-mentioned stem shape bar 13 less than cylindrical body 12 diameters at rear portion simultaneously less than its anterior valve plate 14 circumferential profiles; The aluminium liquid of fluid or semifluid shape accumulated stem shape bar 13 around; After the optimized distribution of valve plate 14 positive and negative, arrive the aluminium liquid uniformity at the mouth of pipe place of segment tube head 16, so just can guarantee the aluminum pipe of Overmolded uniform wall thickness around cable.Wherein aluminium liquid is extruded the aluminium liquid that rubs into fluid or semifluid shape by open at preceding patent application application number 200910144064.8, repeats no more here.Core of the present invention is providing a kind of core rod of structure optimization, and wherein vital content comprises draining hole 17 and the valve plate of offering on the cylindrical body 12 14, below specifies.

In fact described draining hole 17 is the interface of accepting the aluminium liquid of fluid or semifluid shape; It is again the output position of sending the aluminium liquid of fluid or semifluid shape with charge free; The position, two side of draining hole 17 demonstrates the shape of dustpan both sides; So just can implement to send with charge free to aluminium liquid symmetrically, draining hole 17 be symmetrical set two in addition, has so just guaranteed the aluminium liquid measure symmetry that obtains around valve plate 14 back sides; In addition, valve plate 14 finally arrives the mouth of pipe place aluminium liquid uniformity all around of segment tube head 16 by the reasonable distribution of the back side to the flow path in front.For the ease of processing, the peripheral profile of valve plate 14 is chosen as ellipse, and the ellipse here is not strict ellipse on the mathematical meaning, and its peripheral profile looks similar ellipse in fact.Another key character is exactly the rear that draining hole 17 is positioned at the oval-shaped major axis card of valve plate 14; Because draining hole 17 be positioned at axial direction the front portion aluminium liquid send with charge free output comparatively convenient with directly; So let the dead ahead of draining hole 17 facing to the back side at the oval-shaped major axis position of valve plate 14; Let the aluminium liquid at this position could arrive segment tube head 16 places through long path, with the distribution of this reasonable disposition aluminium liquid, as shown in Figure 4.

As preferred version, the bottom surface at described draining hole 17 places overlaps with the cylinder of stem shape bar 13, and the cylinder of stem shape bar 13 overlaps with valve plate 14 minor axis dimension.This structure not only is convenient to processing, and, because valve plate 14 minor axis both sides are positioned at the highest distance position place apart from draining hole 17, can provide the shortest path to make aluminium liquid promptly arrive the positive of valve plate 14 like this and then in time sent with charge free segment tube head 16 places.

The front and rear sections of described through hole 11 is minor diameter and large diameter straight hole section, and the middle part is forward to be the taper hole changeover portion, and this taper hole changeover portion is corresponding with the front and back position of valve plate 14.Adopt said structure can make things convenient for cable to pass through from back to front, can guarantee that the leading portion smaller diameter end aperture of through hole 11 is little to cable enforcement location and locating friction simultaneously again, the back, location is in time Overmolded by aluminium liquid.

In view of the structure of core rod body 10 self is comparatively complicated, can preferably adopt composite construction or claim split type assembly structure, it is positive or claim that parts of forward, central part assembling constitute core rod body 10 integral body to be about to valve plate 14; Concrete scheme is: the positive middle part of described valve plate 14 is provided with counterbore; This counterbore is used to patch the back segment 181 of conical ring 18, and is as shown in Figure 8, and conical ring 18 middle parts are segment tube head 16; The front 141 of valve plate 14 is concordant consistent with the tapering in the front 182 of conical ring 18; As shown in Figure 6, can guarantee that like this smooth and easy of aluminium liquid flows, the outer wall of described segment tube head 16 is the recessed step axles in middle protruding both sides; A little received obstruction, occurs overstocking or packing phenomenon when the structure of this step axle shape let the aluminium flow to this position exactly, guaranteed that the aluminium liquid liquid outlet quantity around segment tube head 16 terminations is abundant and even.

In order to ensure installing and locating; Especially to guarantee that draining hole 17 is corresponding with the feed liquor path; So the position of core rod body 10 is confirmed very important when installing; Concrete solution is that symmetry is offered two locating holes 121 on the rear end face of described cylindrical body 12, and described locating hole 121 is positioned at projected position place vertically, valve plate 14 major axis tops.

Claims

1. core rod; The hole (11) that the confession cable that has fore-and-aft direction to open in the core rod body (10) passes through; Back segment is cylindrical body (12), it is characterized in that: the front end of cylindrical body (12) has the less stem shape bar (13) of diameter, and the front end of stem shape bar (13) has valve plate (14); The peripheral profile of valve plate (14) is oval; The front of valve plate (14) is conicoid (15), and being positioned at place, through hole (11) aperture has the segment tube head (16) that extends forward, and cylindrical body (12) offers the draining hole (17) of two dustpan shapes near symmetry on the cylinder of stem shape bar (13); Draining hole (17) is positioned at the rear of the oval-shaped major axis plate face of valve plate (14), enclose between valve plate (14), stem shape bar (13) and the draining hole (17) be positioned at die holder (20) hold and supply the cavity path that fluent material passes through.

2. core rod according to claim 1 is characterized in that: the bottom surface that described draining hole (17) is located overlaps with the cylinder of stem shape bar (13), and the cylinder of stem shape bar (13) overlaps with valve plate (14) minor axis dimension.

3. core rod according to claim 1 and 2; It is characterized in that: the front and rear sections of described through hole (11) is minor diameter and large diameter straight hole section; The middle part is forward to be the taper hole changeover portion, and this taper hole changeover portion is corresponding with the front and back position of valve plate (14) on axial direction.

4. core rod according to claim 1 and 2; It is characterized in that: the positive middle part of described valve plate (14) is provided with counterbore (111); This counterbore (111) is used to patch the back segment (181) of conical ring (18); Formation segment tube head (16) is extended at conical ring (18) middle part forward, and the front (141) of valve plate (14) is concordant consistent with the tapering in the front (182) of conical ring (18).

5. core rod according to claim 4 is characterized in that: the outer wall of described segment tube head (16) is the recessed step axles in middle protruding both sides.

6. core rod according to claim 1 and 2 is characterized in that: symmetry is offered two locating holes (121) on the rear end face of described cylindrical body (12), and the shaft core line of described locating hole (121) overlaps with the projection vertically of valve plate (14) major axis top.