CN201566100U

CN201566100U - Exhaust push rod for ejection to shape

Info

Publication number: CN201566100U
Application number: CN2009201663891U
Authority: CN
Inventors: 脇山高志
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-30
Filing date: 2009-07-30
Publication date: 2010-09-01
Anticipated expiration: 2019-07-30

Abstract

The utility model discloses an exhaust push rod for ejection to shape, which is used in ejection and shaping so as to exhaust generated gas. A cylinder portion of the top end of the length direction of the exhaust push rod and the length direction in the cylinder portion can be provided with at least a micro exhaust groove, a gas escaping groove communicated with the micro exhaust groove, and a gas guide groove which is communicated with the gas escaping groove and is extended outside the bottom surface of the cylinder body, wherein the exhaust groove, the gas escaping groove and the gas guide groove are arranged in the exhaust push rod to form a gas guide channel for exhausting gas. Since the gas guide channel is arranged in the exhaust push rod, and the problem of imperfect action caused by exhausting outside the push rod is effectively solved.

Description

The injection molding exhaust push rod

Technical field

The utility model relates to exhaust push rod, more particularly, relates to a kind of plastic material (resin) and inject the injection molding exhaust push rod that formation manufactured goods process uses in the mould under the state of dissolving.

Background technology

Existing method for exhausting is that die joint or the joint face at mould is provided with air discharge duct or steam vent, makes the air that exists in the mould and plastic material melt the gas (claiming gas later on) that the back produces and discharges outside the mould.

In addition, on the assembly close around the push rod, offer a ventilating groove or steam vent provides certain clearance with this, internal gas is discharged outside the mould with it.

On the one hand, be stepped as the leading section of the Z prefix push rod of band runner mouth, also can't bring into play effect even done exhaust processing, so generally carry out exhaust processing.

Existing method for exhausting shown in Fig. 1～3, resin begins to inject from resin inlet 1 among the figure, through runner 2, runner mouth 3, stub bar 4, inlet 5 arrives goods portion 6, successively filling again.In this process, if gas is not discharged outside the mould, goods portion 6 those places are imperfect with regard to filling, can cause and lack material (that is: shape is incomplete), burn (the position deficiency of exhaust or too concentrated,, formed and to burn phenomenon by after high temperature compressed at the front of die joint air discharge duct 7 gas) etc. bad phenomenon.Position I avoids the position for mould in the place among Fig. 1.

In order to solve the problem of exhaust deficiency, establish a die joint air discharge duct 7 at the mould die joint place of Fig. 2, gas is run away to die joint by this groove and is escaped gas port 8 places; Establish a cutting part air discharge duct 9 in the place of cutting part 12, gas is run away to cutting part and is escaped the stop of gas port 10 places, and according to the order of resin filling successively, gas just is extruded from each air-vent then, discharges mould outer (arrow portion shown in Figure 1) at last.

In said method under the not enough local or situation that is not easy to cut apart, as Fig. 3, on push rod 13 (goods arrow points behind the resin fill), establish a push rod air discharge duct 14, make gas rest on push rod and escape gas port 15, then according to the order of resin filling successively, gas just is extruded from steam vent, discharges mould outer (arrow portion shown in Figure 1) at last.

But at die joint air discharge duct 7, under the small-sized situation of divisional plane air discharge duct 9 and push rod air discharge duct 14, exhaust to no effect; Under the situation that size is too big, the resin outflow has just become burr, and (that is: resin flows to the fleshiness phenomenon that gapped local back occurs in the mould on the contrary.)

Exhaust for the exhaust push rod end, the discharge path of gas is through near the top end face of push rod 13, include the analyte after the gasification in the gas that resin cooling back produces, additive etc. (thing that adds in order to promote the resin flows row), as Fig. 3, at push rod air discharge duct 14 places, gas is escaped gas port 15 by push rod, when discharging outside the mould, with just cooled off after the top end face of push rod 13 contacts, circumferential surface is adhered on the top of push rod 13, so the sliding part gap of exhaust push rod top ends is more and more littler, and it is bad that start takes place push rod 13.

In addition, under the situation that burr take place, the gap of exhaust push rod top sliding part is plugged, thereby the generation start is bad.

The utility model content

The utility model is exactly the problem that takes place when solving the exhaust of push rod 13 places, can exhaust that start does not take place yet is bad.

The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of injection molding exhaust push rod, be used at injection molding, discharge the gas that produces, barrel portion on the length direction top of exhaust push rod, form on the length direction in described barrel portion at least one fine air discharge duct, be connected with described fine air discharge duct escape air drain and be connected and extend to air slot outside the bottom surface of described barrel portion with the described air drain of escaping; By air discharge duct, escape air drain and air slot and be formed for gas is discharged the outer air guide channel of described exhaust push rod.

With in the exhaust push rod, in the leading section of described barrel portion, be bumped into the exhaust piece at injection molding described in the utility model, on described exhaust piece, form at least one fine air discharge duct.

With in the exhaust push rod, described exhaust piece is spliced by a plurality of exhaust fritters, and forms described at least one fine air discharge duct at injection molding described in the utility model.

With in the exhaust push rod, be bumped into the exhaust piece at injection molding described in the utility model in the leading section of described column part, described at least one fine air discharge duct is at least one the trickle groove that is processed to form on described exhaust piece.

With in the exhaust push rod, described exhaust push rod is to eject push rod or the stationary flowpath side that product uses to extract the Z prefix pull bar that product is used in the injection molding process at injection molding described in the utility model.

Implement injection molding exhaust push rod of the present utility model, have following beneficial effect:, can solve the bad problem of start that causes because of exhaust because of inside has been provided with exhaust pathway.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the part section structure schematic diagram of the mould of prior art;

Fig. 2 is the local enlarged diagram at A place among Fig. 1;

Fig. 3 is the sectional drawing of Fig. 2;

Fig. 4 is that A place the utility model injection molding is installed in structural representation in the mould with exhaust push rod among Fig. 1;

Fig. 5 is the structural representation of the utility model push rod;

Fig. 6 is the structural representation of an embodiment of the utility model exhaust fritter;

Fig. 7 is the structural representation of another embodiment of the utility model exhaust fritter;

Fig. 8 is the utility model is imbedded the exhaust fritter in exhaust push rod a sectional drawing;

Fig. 9 is the vertical view after the exhaust push rod of Fig. 8 is imbedded the exhaust fritter;

Figure 10 is the local enlarged diagram at C place among Fig. 4;

Figure 11 is the structural representation of the utility model Z prefix exhaust push rod;

Figure 12 is the sectional drawing when Z prefix exhaust push rod is imbedded the exhaust fritter among Figure 11;

Figure 13 is the planar structure schematic diagram when Z prefix exhaust push rod is imbedded the exhaust fritter among Figure 11;

Figure 14 is the local enlarged diagram at D place among Figure 12;

Figure 15 is the sectional drawing of the exhaust push rod leading section of the fine pass of the utility model;

Figure 16 is the planar structure schematic diagram of the exhaust push rod leading section of the fine pass of the utility model;

Figure 17 is the planar structure schematic diagram of the exhaust push rod of the utility model rill grooved.

The specific embodiment

[symbol description]

1 resin inlet

2 runners

3 runner mouths

4 stub bars

5 inlets

6 goods portions

7 die joint air discharge ducts

8 die joints are escaped gas port

9 cutting part air discharge ducts

10 cutting parts are escaped gas port

11 die joints

12 cutting parts

13 push rods

14 push rod air discharge ducts

15 push rods are escaped gas port

16 exhaust push rods

17 exhaust fritters with two air discharge ducts

18 exhaust fritters with an air discharge duct

The position that 19 exhaust fritters are bumped into

The air slot of offering in 20 exhaust push rods

The air discharge duct of offering on the 21 exhaust fritters

22 escape air drain

Gas port is escaped in the bottom of 23 exhaust fritters

24Z prefix exhaust push rod

25 are bumped into the ditch that is processed to form

The exhaust push rod of 26 fine passes

The steam vent of offering on the exhaust push rod of 27 fine passes

The initial apertures of the line cutting processing that is provided with on the 28 rill grooved exhaust push rods

The exhaust trench that is provided with in the 29 rill grooved exhaust push rods

Shown in Fig. 5～18, in Fig. 5, the leading section of exhaust push rod 16 discharges processing in order to be bumped into the shape of exhaust fritter such as position 19 later on, and in a preferred embodiment, it can be 2.4mm * 2.5mm * 3mm square hole 19.Then, use the pore processing machine, be processed to form air slot 20 as shown in Figure 5.Then, do an exhaust fritter 17 that has 2 air discharge ducts as shown in Figure 6, scope A1 is the tight fit scope of these parts, preferably can be 0.5mm, scope A3 is that gas is discharged scope, preferably can be 1.5～2mm, the length of corresponding A2 can be 2.5mm, after 17 assembly units of exhaust fritter, A4 is the depth dimensions of air discharge duct, it can be 0.01～2mm, and the width of exhaust position A5 can be 0.2mm, and an exhaust fritter 18 that has 1 air discharge duct as shown in Figure 7.

After the bonding agent of heat-resisting usefulness is coated in the two sides of

exhaust fritter

17,18, shown in Fig. 8 and 9,

exhaust fritter

17,18 is bumped into square hole 19 places.Make it to form four air discharge ducts in the central portion both sides of exhaust fritter 17 and the two ends, the outside of exhaust fritter 18.

Exhaust push rod 16 in the mould pack into when resin fill, and resin is from resin inlet 1, through runner 2, runner mouth 3, stub bar 4, inlet 5, being filled to goods portion 6, gas just from the inboard of goods portion 6 to being extruded.

The gas of extruding from goods portion 6 inside portions, as shown in figure 10, through the ventilating groove of establishing in the exhaust fritter of imbedding in exhaust push rod 16 ends 17,18 21, escape gas through escaping air drain 22, enter the bottom and escape gas port 23 exhausts, be stuck in 20 li of air slots at last, successively by the degree of filling, gas will be extruded from steam vent, be communicated with from bottom air slot 20 or with air slot 20 then, promptly shown in Figure 1, discharge from the position, die clearance.

Z prefix exhaust push rod as shown in figure 11, in the position 19 of leading section discharge processing in order to be bumped into the exhaust fritter later on of Z prefix exhaust push rod 24, in a preferred embodiment, it can be the square hole 19 of 1.6mm * 25mm * 3mm.Afterwards, with pore processing machine processing push rod air slot 20.Then, as shown in Figure 6, process an exhaust fritter 17 that has two air discharge ducts.As shown in Figure 7, exhaust fritter 18 that has an air discharge duct of processing.Coat the bonding agent of heat-resisting usefulness in the side of

exhaust fritter

17,18, shown in Figure 12,13,

exhaust fritter

17,18 is bumped into square hole 19 places, be configured, formed 3 ventilating grooves from the outside of the band air discharge duct of exhaust fritter 17,18.At last, the ditch 25 that will be processed to form in order to be bumped into the exhaust fritter carries out laser spot welding to be filled and led up, and grinds and has cut the state that returned to again after the processing before being bumped into.

When this Z prefix exhaust push rod 24 carries out resin fill in mould, resin is from resin inlet 1, through runner 2, runner mouth 3 carries out filling, the gas of stagnating at runner mouth place, through the air discharge ducts 21 that are provided with in the exhaust fritter of imbedding in the Z prefix exhaust push rod 24 17,18, escape air drain 22, gas port 23 is escaped in the bottom, be stuck in 20 li of air slots at last, as shown in figure 14, successively by the degree of filling, gas will be extruded from steam vent then, from the bottom surface or perhaps air slot 20 or be communicated with air slot 20, as shown in Figure 1, outside mould is discharged in the die clearance.

In the processing method of steam vent, shown in Figure 15 and 16, the air slot 20 of the exhaust push rod 26 of fine pass carries out not break-through discharge processing, and many holes 27 are offered at remaining thickness of slab position, and in a preferred embodiment, the diameter in hole 27 is 0.04mm.

In addition, as shown in figure 17, also available fine groove substitutes minute aperture, with pore processing machine machining hole 28, in a preferred embodiment, the diameter in hole 28 is 0.2mm, it is the initial apertures of line cutting processing, utilize that one of wire electrode cutting machine processing is wide be the exhaust trench 29 of 0.04mm, carry out laser spot welding at the initial apertures place at last and fill and lead up, cunning is tied in grinding then.

In Figure 15～17, Z prefix exhaust push rod 24 also may be used the processing method of existing minute aperture and fine ditch shape, but does not limit this example.

According to resin kind difference, for the resin of good fluidity, both made when ventilating groove is small-sized also burr to occur, can select freely to set the ventilating groove size, better for the use of minute aperture or fine ditch type.Bad for flowability, need not to worry to occur burr.

Claims

1. injection molding exhaust push rod, be used at injection molding, discharge the gas that produces, it is characterized in that, barrel portion on the length direction top of exhaust push rod, form on the length direction in described barrel portion at least one fine air discharge duct, be connected with described fine air discharge duct escape air drain and be connected and extend to air slot outside the bottom surface of described barrel portion with the described air drain of escaping; By air discharge duct, escape air drain and air slot and be formed for gas is discharged the outer air guide channel of described exhaust push rod.

2. injection molding exhaust push rod according to claim 1 is characterized in that, is bumped into the exhaust piece in the leading section of described barrel portion, forms at least one fine air discharge duct on described exhaust piece.

3. injection molding exhaust push rod according to claim 2 is characterized in that, described exhaust piece is spliced by a plurality of exhaust fritters, and forms described at least one fine air discharge duct.

4. injection molding exhaust push rod according to claim 1 is characterized in that, is bumped into the exhaust piece in the leading section of described column part, and described at least one fine air discharge duct is at least one the trickle groove that is processed to form on described exhaust piece.

5. injection molding exhaust push rod according to claim 1 is characterized in that, described exhaust push rod is to eject push rod or the stationary flowpath side that product uses to extract the Z prefix pull bar that product is used in the injection molding process.