CN202016175U

CN202016175U - Die runner structure

Info

Publication number: CN202016175U
Application number: CN2011201058266U
Authority: CN
Inventors: 那仓孝行
Original assignee: SUZHOU TECHWELL PRECISION MOLD CO Ltd
Current assignee: SUZHOU TECHWELL PRECISION MOLD CO Ltd
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-10-26
Anticipated expiration: 2021-04-12

Abstract

The utility model discloses a die runner structure which comprises a first runner plate and a second first runner plate disposed below the first runner plate, wherein runners are arranged on both the first runner plate and the second runner plate, the runners on the first runner plate correspond to the runners on the second runner plate, a plurality of first runners and a plurality of second runners are arranged on the first runner plate, and one first runner is connected with at least two second runners through one connection runner. In the utility model, on one hand, the distance that smelted glue inside the first runner flows into the output end of the second runner is shorter, on the other hand, that the speed of the smelted glue tangentially flowing into the second runner is different from the speed of the smelted glue flowing from the first runner into other second runner, which causes differences on smelted glue condensation, can be avoided, and meanwhile, a flow speed control unit is further arranged inside the second runners so as to adjust the flow speed of the smelted glue inside the second runners.

Description

The mold runner structure

Technical field

The utility model relates to a kind of runner, relates in particular to a kind of flow passage structure of ejection shaping die.

Background technology

Fig. 1 is the schematic diagram of the mould of existing a kind of ejection formation, and Fig. 2 is the mold runner structural representation of Fig. 1.Please refer to Fig. 1 and Fig. 2, existing mold 100 has runner plate 110, and melten gel is to flow to each die cavity (not looking out among the figure) via the flow passage structure in the runner plate 110 200, and one forms required product 50.

Existing flow passage structure 200 comprises input duct 210, a plurality of first flow 220, a plurality of second runner 230, a plurality of the 3rd runner 240 and a plurality of delivery channel 250.One end of each first flow 220 is to connect input duct 210, and the other end of each first flow 220 connects an end of three second runners 230.The other end of each second runner 230 connects one the 3rd runner 240, and each the 3rd runner 240 connects a plurality of delivery channels 240. in addition, first flow 220, second runner 230 and the 3rd runner 240 are positioned on the same XY plane, and input duct 250 extends along the Z axle.Input duct 210 has input port 212, and melten gel is 212 inflow input ducts 210 from the input port.Then, melten gel flow through successively first flow 220, second runner 230, the 3rd runner 240 and input duct 250, and flow to each die cavity from input duct 250.

Fig. 3 is the schematic diagram of regional A1 among Fig. 2.Please refer to Fig. 2 and Fig. 3, in three second runners 230 that each first flow 220 is connected, the bearing of trend of one of them second runner 230 is identical with the bearing of trend of first flow 220, all is to extend along X-axis, and two other second runner 230 is to extend along Y-axis.In other words, when melten gel 60 when each first flow 220 flows into three second runners 230, inflow is according to flow direction originally along the melten gel 60 of second runner 230 that X-axis is extended, and inflow need be through turnover along melten gel 60 its flow directions of second runner 230 of Y-axis extension.So, will be greater than the melten gel flow of crossing in second runner 230 that extends along Y-axis along the melten gel flow in second runner 230 of X-axis extension.Therefore, in the unit interval, the melten gel amount of the die cavity of inflow region A2 (not looking out among the figure) will be bigger, and it is too much to be easy to generate the melten gel filling, cause stress raisers and the size of product 50 morphs.

Summary of the invention

The purpose of this utility model provides a kind of mold runner structure, by changing the structure of sprue and runner, makes melten gel can evenly flow to each die cavity.

In order to achieve the above object, the utility model proposes a kind of mold runner structure, comprise first-class guidance tape and second runner plate that is disposed at described first-class guidance tape below, all be provided with runner on described first-class guidance tape and described second runner plate, and the runner on the described first-class guidance tape is corresponding with the runner on described second runner plate, have at least one first flow and at least one second runner on the described first-class guidance tape, described first flow has one first input port and one first delivery outlet, described second runner has one second input port and one second delivery outlet, and described first flow connects runner by one and is connected at least two described second runners.

Above-mentioned mold runner structure, described first flow are the tangent line of circular arc and described first delivery outlet perpendicular to described connection runner.

Above-mentioned mold runner structure, described second runner is circular arc.

Above-mentioned mold runner structure, described second runner is provided with the flow velocity control assembly, the flow channel length of described second input port between the described flow velocity control assembly greater than described second delivery outlet to the flow channel length between the described flow velocity control assembly.

Above-mentioned mold runner structure, described first input port is connected with a melten gel inlet.

With respect to the existing mold flow passage structure, the utility model is arranged to runner circular-arc, and second runner tangentially is not set at the first flow output, make on the one hand melten gel in the first flow flow to second runner output the distance of process close, also avoided melten gel to flow into the speed of tangential second runner and difference that melten gel that cause condense different straight by first flow on the other hand with the speed that flows into other second runners by first flow, simultaneously, the utility model also is provided with the flow velocity control assembly in second runner, inconsistent or close or when reducing a certain second runner melten gel, can be achieved when the flow velocity in a plurality of second runners by regulating the flow velocity control assembly according to product needed.

Description of drawings

By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.

Fig. 1 is the schematic diagram of the mould of existing a kind of ejection formation;

Fig. 2 is the flow passage structure schematic diagram of the mould of Fig. 1;

Fig. 3 is the schematic diagram of regional A1 among Fig. 2;

Fig. 4 is a mold runner structural representation of the present utility model.

The specific embodiment

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

Flow passage system is also referred to as runner system or running gate system, be melten gel from the ejaculator nozzle to die cavity must channel.Flow passage system comprises sprue, runner and cast gate.

Sprue: be also referred to as main running channel, annotate road or sprue, be meant from the ejaculator nozzle and start at, the runner till the runner with the part that the mould sprue bush contacts.This part is that molten plastic enters the part of flowing through at first behind the mould.

Runner: be also referred to as branch running channel or inferior running channel, can divide into first runner and second runner again with the mould design.Runner is the transitional region between sprue and cast gate, can make the flow direction of melten gel obtain mild conversion; Have the function of uniform distribution plastics simultaneously for multi-cavity mold to each die cavity.

Cast gate: be also referred to as charging aperture.It is the narrow and small port between runner and die cavity.Solidify at first and seal at the moulding back cast gate that finishes, have to prevent that melten gel from refluxing and avoid the die cavity pressure too fast function that makes moulding product generation systolic depression that descends.

Please refer to Fig. 4, Fig. 4 is a mold runner structural representation of the present utility model.This mold runner structure comprises first-class guidance tape (not looking out among the figure) and is disposed at second runner plate (not looking out among the figure) of first-class guidance tape below, all be provided with runner on the first-class guidance tape and second runner plate, and the runner on the first-class guidance tape is corresponding with the runner on second runner plate, have at least one first flow 4 and at least one second runner 1 on the first-class guidance tape, first flow 4 has one first input port and one first delivery outlet, second runner 1 has one second input port and one second delivery outlet, and first flow 4 connects runner 5 by one and is connected at least two second runners 1.Present embodiment comprises two first flows 4 as can be seen in mold runner structural representation shown in Figure 4, first delivery outlet of two first flows 4 is connected runner 5 respectively with two middle part links to each other, each two ends that connect runner 5 all is connected with second runner 1, like this, on first-class guidance tape, just there are 4, two of two first flows to connect runner 5 and four second runners 1.

Further, first flow is the tangent line of the circular arc and first delivery outlet perpendicular to described connection runner.Such design makes the melten gel that flow into to connect behind the runner from first flow equate in the angle of first flow first delivery outlet, and then flow velocity is also close.Preferably, second runner also is circular arc, so that relax the melten gel flow velocity.

Second runner be provided with the flow channel length of flow velocity control assembly 2, the second input ports between the flow velocity control assembly 2 greater than second delivery outlet to the flow channel length between the flow velocity control assembly 2.That is to say second delivery outlet of close more second runner of flow velocity control assembly 2, if desired, can when melten gel is about to flow out, further control the speed of melten gel.

First input port is connected with a melten gel inlet 3.

The consideration that die cavity is arranged adopts balanced type to arrange as far as possible.The die cavity layout is offered with cast gate and is made every effort to symmetry, and the problem of hold mode flash takes place to prevent the mould unbalance stress from producing unbalance loading.The consideration of flow guide can successfully guide molten plastic to fill up die cavity, does not produce eddy current, and exhaust smoothly.Avoid less core and the metal insert of plastics melten gel frontal impact diameter, to prevent core displacement or distortion as far as possible.Thermal losses and pressure fall the smaller the better.Flow process will be lacked.Cross section of fluid channel is long-pending will to reach greatly.Avoid runner bending and flip-flop to flow to as far as possible.

It should be noted that; above content is to further describing that the utility model is done in conjunction with concrete embodiment; can not assert that the specific embodiment of the present utility model only limits to this; under above-mentioned guidance of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improvement or distortion drop in the protection domain of the present utility model.

Claims

1. mold runner structure, comprise first-class guidance tape and second runner plate that is disposed at described first-class guidance tape below, all be provided with runner on described first-class guidance tape and described second runner plate, and the runner on the described first-class guidance tape is corresponding with the runner on described second runner plate, have at least one first flow and at least one second runner on the described first-class guidance tape, described first flow has one first input port and one first delivery outlet, described second runner has one second input port and one second delivery outlet, it is characterized in that:

Described first flow connects runner by one and is connected at least two described second runners.

2. mold runner structure according to claim 1 is characterized in that:

Described first flow is the tangent line of circular arc and described first delivery outlet perpendicular to described connection runner.

3. want 1 described mold runner structure according to right, it is characterized in that:

Described second runner is circular arc.

4. according to claim 1 or 3 described mold runner structures, it is characterized in that:

Described second runner is provided with the flow velocity control assembly, the flow channel length of described second input port between the described flow velocity control assembly greater than described second delivery outlet to the flow channel length between the described flow velocity control assembly.

5. mold runner structure according to claim 1 and 2 is characterized in that:

Described first input port is connected with a melten gel inlet.