CN201201326Y

CN201201326Y - Uniform distributing plastic section bar extruding mould

Info

Publication number: CN201201326Y
Application number: CNU2008200702292U
Authority: CN
Inventors: 李乾斌; 刘军团; 曹新义; 孟培; 程伟; 魏海娟; 乔德建; 蒋景彩
Original assignee: LUOYANG JIANYUAN MOULD MANUFACTURE CO Ltd
Current assignee: LUOYANG JIANYUAN MOULD MANUFACTURE CO Ltd
Priority date: 2008-04-28
Filing date: 2008-04-28
Publication date: 2009-03-04
Anticipated expiration: 2018-04-28

Abstract

The utility model discloses a plastic section extrusion mould for evenly distributing materials. The mould comprises a molding plate (1), a pre-molding plate (2), a compression plate (3), a core body fixed plate (4), a shunting inner core fixed plate (5), a transition plate (6) and a connecting body (7); the parts are fastened together to form a mould body; a core body is fixed on the core body fixed plate; a shunting inner core is fixed on the inner core fixed plate; and an inlet of the shunting inner core is provided with a shunting cone for shunting materials. The plastic section extrusion mould is characterized in that various shunting flow passage formed between the shunting cone and the mould body have the same compression ratio (D1/D2), that is the ratio of the size (D1) of the clearance of the shunting flow passage positioned in the a tip (10) of the shunting cone to the size (D2) of the clearance of the shunting flow passage positioned in the tail (11) of the shunting cone is the same. The structure can evenly distribute the materials; the pressure and the flow speed of each part achieve the perfect state, the uniformity of the discharging speed of a finish mold parison is further ensured, the debugging time is reduced and the stability of mould operation is improved.

Description

A kind of even sub-material plastic material extrusion die

Technical field

The utility model belongs to a kind of plastic material extrusion die, relates generally to the even sub-material plastic material extrusion die of hollow plastic section bar.

Background technology

Existing extrusion profile mould sub-material mode: the extrusion profile mouth mould sub-material mode that generally adopts is at the sub-material position now, shunting inner core arrival end is carried out chamfering, make shunting inner core inlet be wedge angle, and material is assigned to each position of outer wall runner and interior muscle runner.Adopt this method that the material of inlet port mould is distributed, runner does not have the dead angle, can both be assigned to material at each position of runner.This is for circular, square with regular section bars such as the circle that muscle is arranged in having evenly, squares, and it is very uniform that his material distributes, and the discharging at each position of parison is even.What the application of section bar extrusion die was maximum is irregular section bar, at shunting beginning position, each spot size of runner has size differences, it all is that it is carried out middle branch that the shunting inner core distributes material, then each position is just different at the compression ratio of shunting position formation, make the material maldistribution, cause the discharging at each position of parison inhomogeneous.

Summary of the invention

The purpose of this utility model provides a kind of even sub-material plastic material extrusion die, makes it can solve the uneven problem of parison discharging speed that irregular section causes in extrusion die mouth mould shunting position material maldistribution.

The purpose of this utility model can adopt following technical scheme to realize: the utility model comprises profiled sheeting, parts such as preformed board, compressive plate, core body fixed head, shunting inner core fixed head, rebound, connector, above-mentioned parts are located with pin, and with the screw formation die ontology that tightens together.Core body and shunting inner core are respectively fixed on core body fixed head and the shunting inner core fixed head; The porch of shunting inner core is provided with the branch flow cone that is used for material diversion.Compression ratio by the every punishment stream runner that forms between minute flow cone and the die ontology is identical, and it is identical with the ratio that divides flow cone tail place runner gap size promptly to be positioned at shunting cone tip part runner gap.

The utility model is the runner splitter section at the mouth mould, shunting cone tip part runner gap and branch runner gap, flow cone tail place are optimized, guarantee that the cone tip part of runner shunting everywhere runner gap is identical with the ratio (being compression ratio) that divides flow cone tail place runner gap size, realize even sub-material, and then produce identical extrusion pressure, solve the uneven problem of parison discharging speed that irregular section causes in extrusion die mouth mould shunting position material maldistribution.

The utility model solves the uneven problem of parison discharging speed that irregular section causes in extrusion die mouth mould shunting position material maldistribution at the plastic hollow section bar.By inlet shunting position at the mouth mould, calculating to big re-entrant portion and areola spot size difference and the distribution of interior muscle, splitter section entrance channel cross section is analyzed, this position runner is optimized design, each position of parison is adjusted at sub-material inlet position sectional area, this technology has fully solved the problem of mouthful mould sub-material position material maldistribution, makes the pressure at each position and flow velocity reach perfect condition, and then guarantees mouthful uniformity of model base discharging speed.Reduce debug time, increase the stability of mould operation.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is A-A views of Fig. 1.

Accompanying drawing 3 is B-B views of Fig. 1.

Accompanying drawing 4 is C-C views of Fig. 2.

Accompanying drawing 5 is D-D views of Fig. 2.

Accompanying drawing 6 is E-E views of Fig. 2.

Among the figure: 1, profiled sheeting, 2, preformed board, 3, compressive plate, 4, the core body fixed head, 5, divide

Stream inner core fixed head, 6, rebound, 7, connector, 8, core body, 9, the shunting inner core, 10, divide the flow cone point, 11, divide the flow cone tail, 12,13,14, flow manifold.

The specific embodiment

In conjunction with the accompanying drawings, specific embodiment of the utility model is described

As accompanying drawing 1,2,3, the utility model comprises profiled sheeting 1, parts such as preformed board 2, compressive plate 3, core body fixed head 4, shunting inner core fixed head 5, rebound 6, connector 7, above-mentioned parts tighten together with screw and constitute the body of mould, and the processing pin guarantees relative position to adjacent part location.Core body 8 is fixed on the core body fixed head 4, and the location; Shunting inner core 9 is fixed on the shunting inner core fixed head 5, and the location.At profiled sheeting 1, preformed board 2, compressive plate 3, core body fixed head 4, shunting inner core fixed head 5, rebound 6 is provided with die cavity on connector 7 parts, forms the outline of runner; On core body 8 and shunting inner core 9, die cavity is set, forms the interior profile of runner; The porch of shunting inner core 9 is provided with the branch flow cone that is used for material diversion, and the material diversion position begins to be diverted to branch flow cone tail 11 end of branch flow cone from the branch flow cone point 10 of minute flow cone.Wherein by in each flow manifold that forms between minute flow cone and the die ontology, the flow manifold gap that is positioned at branch flow cone point 10 places equates with minute ratio in the flow manifold gap at flow cone tail 11 places.

As Fig. 4, Fig. 5, Fig. 6, in the present embodiment, shunt the three

punishment stream runners

12,13,14 that form by the branch flow cone of shunting inner core, compression ratio D1/D2 in the flow manifold at every place equates that all the flow manifold clearance D 1 (the awl point is to the distance of die ontology inwall) that promptly is positioned at sharp 10 places of awl in the flow manifold at every place equates with the ratio D1/D2 in the flow manifold D2 gap (the awl tail is to the distance of die ontology inwall) at awl tail 11 places, guarantees shunting position material distributed uniform.

Claims

1, a kind of even sub-material plastic material extrusion die, comprise profiled sheeting (1), preformed board (2), compressive plate (3), core body fixed head (4), shunting inner core fixed head (5), rebound (6), connector (7), above-mentioned parts tighten together and constitute the body of mould, are fixed with core body (8) on the core body fixed head (4); Be fixed with shunting inner core (9) on the inner core fixed head (5), the porch of shunting inner core (9) is provided with the branch flow cone that is used for material diversion, it is characterized in that: the compression ratio (D1/D2) by the every punishment stream runner that forms between minute flow cone and the die ontology is identical, and the ratio that promptly is positioned at the flow manifold gap size (D2) that flow manifold gap (D1) that shunting awl point (10) locates and branch flow cone tail (11) locate is identical.