CN203650920U

CN203650920U - Surface composite layer raw material-saving hollow die head mandrel

Info

Publication number: CN203650920U
Application number: CN201420015040.9U
Authority: CN
Inventors: 梁斌
Original assignee: ZHEJIANG JINGCHENG MOULD MACHINERY CO Ltd
Current assignee: ZHEJIANG JINGCHENG MOULD MACHINERY CO Ltd
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2014-06-18
Anticipated expiration: 2024-01-10

Abstract

The utility model discloses a surface composite layer raw material-saving hollow die head mandrel. The mandrel is arranged inside a hollow die head and comprises a vertical rib group molding position and a material flow guiding position, wherein a prefilling passage is arranged on the mandrel and used for connecting a melt passage in the die head with the vertical rib molding position. The mandrel is characterized in that a diversion trench is formed in a region where the prefilling passage is; the surface of the material flow guiding position obliquely extends upwards to form a section; the diversion trench and the obliquely-extending section can be used for increasing the pressure of a material flow which flows into the prefilling passage. In a molded plate material product, wedges are not formed at the position of a vertical rib and the position of a composite layer, the surface of a raw material layer is uniformly coated with the composite layer, use of extra material on the outer layer is avoided, and the product structure is improved.

Description

Surface composite layer raw material saving hollow die head core rod

Technical field

The utility model relates to extrusion die field, is specially a kind of surface composite layer raw material saving hollow die head core rod.

Background technology

Hollow board material is to extrude aftershaping by extrusion die, has two-layer material or multilayer dose in melt extrusion passage, and skin is composite bed, covers the upper and lower surface of hollow board material, and raw material layer is moulding hollow board material main body.Shaped article of the prior art, can produce wedge between composite bed and raw material layer, middle R indication position as shown in Figure 1, and the existence of this wedge can cause the unnecessary use of outer composite bed material, and the structure of sheet material imperfection.

For this defect, in CN201632507U, disclosed mandrel structure can address this problem.As shown in Figure 2, by on plug, arrange be pre-charged with perpendicular muscle moulding position 2 ' pre-filled passage 4 ', make pre-filled passage 4 ' inner material stream fill perpendicular muscle moulding position prior to material stream in melt canal, make raw material major part in perpendicular muscle derive from pre-filled passage 4 ', the perpendicular muscle position that so just can not produce composite bed raw material and wedge hollow board material main body.But set up put pre-filled passage 4 ', material diversion position 3 ' surface and plug body surfaces are linearly, material flowing pressure in its passage is inadequate, the raw material of melt canal flow into pre-filled passage 4 ' speed and flow all inadequate, therefore after hollow board material moulding, still have the existence of fraction wedge, the structure of composite bed and raw material layer is also not bery perfect.

Utility model content

The purpose of this utility model is to provide surface composite layer raw material saving hollow die head core rod, by increasing the pressure of material stream in pre-filled passage, accelerate the injection rate of raw material layer, can effectively avoid the generation of the wedge between composite bed and raw material layer, and then improve shaped article structure.

Above-mentioned purpose is achieved through the following technical solutions:

Surface composite layer raw material saving hollow die head core rod, plug is built in hollow die head, plug has perpendicular muscle composing type position and material diversion position, on plug, there is pre-filled passage, pre-filled passage is in order to be communicated with melt canal and the perpendicular muscle moulding position in die head, it is characterized in that: described pre-filled passage region is provided with guiding gutter, surface, described material diversion position is upward stretches out a section, and guiding gutter and this section tiltedly stretching out can increase to flow into expects the pressure that flows in pre-filled passage.

Adopt the surface composite layer raw material saving hollow die head core rod of said structure, the perpendicular muscle position of plate product and composite bed position after moulding no longer include wedge, and composite bed uniform fold is on raw material layer surface, and outer material is not by unnecessary use, and product structure improves.

Brief description of the drawings

Fig. 1 is the structural representation of product after prior art extrusion molding;

Fig. 2 is the structural representation of prior art hollow die head core rod;

Fig. 3 is cross-sectional view of the present utility model;

Fig. 4 is C indication position partial enlarged drawing in Fig. 3;

Fig. 5 is the utility model overall structure schematic diagram;

Fig. 6 is another angle structural representation of the utility model;

Fig. 7 is the structural representation that the utility model plug is arranged in hollow mould head;

Fig. 8 is the structural representation of the utility model shaped article.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Fig. 3-7, surface composite layer raw material saving hollow die head core rod, plug 1 is built in hollow die head, plug 1 has perpendicular muscle composing type position 2 and material diversion position 3, on plug 1, there is pre-filled passage 4, pre-filled passage 4 is in order to be communicated with melt canal 9 and the perpendicular muscle moulding position 2 in die head, described pre-filled passage 4 regions are provided with guiding

gutter

5,3 surfaces, described material diversion position are upward stretches out a section 31, and guiding gutter 5 and this section 31 tiltedly stretching out can increase the pressure that the interior material of the pre-filled passage 4 of inflow flows.

In the time that the material in melt canal 9 is extruded, material stream in pre-filled passage 4 is filled perpendicular muscle moulding position 2 prior to expecting in melt canal that stream collects, make the perpendicular muscle raw material major part of hollow board material derive from pre-filled passage 4, when extrusion molding, composite bed raw material A uniform fold is on the surface of raw material layer, and the two ends at perpendicular muscle moulding position no longer include wedge, as shown in Figure 8, composite bed raw material is not by unnecessary use, and product structure improves.

The above, it is only preferred embodiments of the present utility model, not the utility model is done to any pro forma restriction, every foundation know-why of the present utility model, to any simple modification made for any of the above embodiments, equivalent variations or modification, still belongs in the scope of technical solutions of the utility model.

Claims

1. surface composite layer raw material saving hollow die head core rod, plug is built in hollow die head, plug has perpendicular muscle composing type position and material diversion position, on plug, there is pre-filled passage, pre-filled passage is in order to be communicated with melt canal and the perpendicular muscle moulding position in die head, it is characterized in that: described pre-filled passage region is provided with guiding gutter, surface, described material diversion position is upward stretches out a section, and guiding gutter and this section tiltedly stretching out can increase to flow into expects the pressure that flows in pre-filled passage.