CN201579932U

CN201579932U - Stroke-adjustable piston

Info

Publication number: CN201579932U
Application number: CN2009202214654U
Authority: CN
Inventors: 吴志墉
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-21
Filing date: 2009-10-21
Publication date: 2010-09-15
Anticipated expiration: 2019-10-21

Abstract

A stroke-adjustable piston comprises an outer cylinder and a locking valve, wherein a holding space arranged inside outer cylinder is used for holding the piston, the outer cylinder is provided with an opening which is arranged below the piston and communicated with the holding space, a spacing is arranged between the lower side of the piston and the outer cylinder, a valve needle is arranged at the front end of the locking valve, the valve needle partially penetrates out of the opening of the outer cylinder, an adjusting ring is combined at the rear end of the locking valve in a group manner, a changeable stroke is pre-arranged between the adjusting ring and the locking valve, the outer circumference of the adjusting ring is provided with a folded edge, the folded edge is abutted against the inner wall of the outer cylinder so as to be positioned inside the outer cylinder, and the adjusting ring can be rotated so as to lead the locking valve to move up and down within the stroke range inside the outer cylinder relatively to the adjusting ring, thereby adjusting degree of the valve needle penetrating out of the outer cylinder. The stroke-adjustable piston consumes no extra time in measuring tolerance between a template and a mold to substitute the valve needle in operation, and can be adaptable to different tolerances to reliably fill mold holes so as to achieve the effect of pressurized mold closing only through simple adjustment acts.

Description

The piston of adjustable full line journey

Technical field

The utility model relates to a kind of piston, relate in particular to a kind of have adjust the piston stroke function, make needle can overcome the tolerance that exists between template and mould and cram the piston of the adjustable full line journey of mould hole really.

Background technology

Injection mould is to utilize screw rod that plastics (as thermoplastic) are plastified plastics via shearing effect between screw rod rotation and material pipe and the outer heating of material pipe basically; making it viscosity descends; inject mould subsequently; in case being full of mould, plastics promptly enter packing stage; through supercooling; eject process, finish the whole production cycle.

And the equipment of general injection mo(u)lding comprises that the gas/liquid pressure in order to close die drives mold closing mechanism and the injection device that can carry plastics, aspect the driving mold closing mechanism of close die, mostly be to cooperate board or need folding on the patrix of mould of applying with one or more template, and each template and last intermode all have the through hole of crossing for stream of plastic, through hole can be in alignment with each other and form a complete runner when superimposed, and on keeping, counterdie is to fashionable briquetting pressure, the piston that locked mode is used is housed on the template, present piston 1 is just like Fig. 1, shown in Figure 2, be to be provided with a needle 10 in a piston 1 front end, this needle 10 can pass template and with the hole 30 of syringe needle subtend mould 3,1 in this piston utilizes two pneumatic cylinders 2 to move needle 10 for defeated pressure and crams the hole 30 of mould 3 downwards and do pressurization, or upwards recesses and remove pressurization;

Yet it is well-known, template and mould 3 are because the difference slightly of specification, when superimposed, can between mould 3 and template, form tolerance, when can causing pneumatic cylinder 2 that needle 10 is released, tolerance can't cram mould 3 holes 30 really in template, cause the insufficient pressure of matched moulds, therefore the plastics that pour into mould 3 more may outflow, though the needle 10 that can utilize replacing to be fit to remedies tolerance, but need expend the extra activity duration, can also strengthen pneumatic cylinder 2 further promotes needle 10 downwards for defeated air pressure, but the strength that increases often makes needle 10 collide mould 3 holes 30 downwards, causes the breakage of hole 30 and mold damage 3.

This shows, the function of for want of adjustable full line journey of existing piston, the needle that needs special replacement to be fit to comes the tolerance between calibration template and mould, cause the inconvenience of operation and the waste of activity duration, and the pneumatic piston utilization strengthens the mode that output pressure overcomes tolerance, tend to cause needle to collide mould and cause both infringements, in addition improved necessity is arranged in fact.

The utility model content

Technical problem underlying to be solved in the utility model is, overcome the above-mentioned defective that prior art exists, and provide a kind of piston of adjustable full line journey, need not consume extra measuring time value template and the tolerance between mould when making operation and replace needle, as long as just can adapt to different tolerances and cram the effect that die hole is understood into the pressurization matched moulds thoroughly really by easy adjustment action.

For reaching aforementioned purpose, the utility model comprises:

One outer shell, have an accommodation space in this outer shell and insert, and in the loop order of inwall moulding one convex, this outer shell is offered an opening that is communicated with accommodation space in the piston below for a piston, this piston below then and leave a gap between outer shell, the gap that stays between this piston and this outer shell is slightly larger than 1cm;

This piston comprises a locked mode valve, this locked mode valve front end is provided with a needle, this needle part passes the opening of outer shell, this locked mode valve rear end is provided with a spool, establishes one with this spool group and adjusts ring, is reserved with a variable stroke between this adjustment ring and locked mode valve, the stroke of reserving between this adjustment ring and locked mode valve is 1cm, turn should be adjusted the stroke of the each 0.05mm of transfer of ring, and this adjustment is equipped with and rings sheet, all can produce the sound of prompting in each transfer;

This adjustment ring peripheral ring is provided with a flanging, offsets and is positioned in the outer shell with the loop order of this flanging and the outer inside wall of cylinder, and this adjustments ring is to offer one in central authorities to wear mouth, passes and will adjust with this spool of wearing confession locked mode valve and encircle and locked mode valve group is established;

The outer shell that is equipped with piston is inserted in the template, make this needle pass template and the hole of subtend mould, this adjustment ring of turn makes the locked mode valve adjust ring upper and lower displacement in outer shell relatively in stroke range, adjust the degree that the ring pin passes outer shell whereby, make needle can adapt to tolerances different between template and mould and cram the effect that die hole is understood into the pressurization matched moulds thoroughly really.

In addition, the utlity model has following advantage:

One, piston structure intensity is strong, can be used for the mold closing mechanism of air pressure driving or oil pressure actuated, has the compatibility and the applicability of height with board for the injection moulding pressing mold of different type of machines.

Two, the stroke of adjusting ring is adjusted every loud 0.05mm, promotes to adjust precision adapting to the situation of having only small tolerance between template and mould, and be aided with sound prompting adjustment degree when fine setting.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is that existing piston can't be adjusted stroke and the view that can't cram the mould hole.

Fig. 2 is that existing piston strengthens the view that output pressure causes needle collision mould hole.

Fig. 3 is the perspective exploded view of the piston of the adjustable full line journey of the utility model.

Fig. 4 is that the utility model is inserted the stereoscopic schematic diagram after template is finished assembling.

Fig. 5 is the structural profile schematic diagram of the utility model piston in outer shell internal standard position.

Fig. 6 is that the utility model strengthens the structural profile schematic diagram that stroke is adjusted the ring pin downwards.

Fig. 7 is that the utility model dwindles the structural profile schematic diagram that stroke adjusts upward the ring pin.

The number in the figure explanation:

Piston 1 needle 10 pneumatic cylinders 2

Mould 3 holes 30

Outer shell 4 accommodation spaces 40 loop orders 41

Opening 42 pistons 5 locked mode valves 50

Valve body 501 neck grooves 5011 O type rings 5012

Needle 502 spools 503 are adjusted ring 51

Flanging 511 is worn mouthful 512 templates 6

Notch 60 lids 61 moulds 7

Hole 70 gap A stroke B

The specific embodiment

The utility model is the piston of relevant a kind of adjustable full line journey, please consults Fig. 3 earlier to shown in Figure 5, comprises in present embodiment:

One outer shell 4, these outer shell 4 outer surfaces are stepped, in then have an accommodation space 40 and insert for a piston 5, and in the loop order 41 of inwall moulding one convex, this outer shell 4 is offered a circular open 42 that is communicated with accommodation space 40 in piston 5 belows, these piston 5 belows then and 4 of outer shells leave a gap A, the gap A that 4 of this piston 5 and this outer shells stay is slightly larger than 1cm;

This piston 5 comprises a locked mode valve 50, these locked mode valve 50 stage casings are shaped to a valve body 501 than the bigger external diameter of other parts tool, these valve body 501 peripheries are concaved with the neck groove 5011 of a ring-type, this valve body 501 contacts with outer shell 4 inwalls, and in neck groove 5011 an O type ring 5012 is set locked mode valve 50 and outer shell 4 inwalls are done appropriate packing location, prevent that it from moving and preventing to import the leakage of air pressure or hydraulic pressure arbitrarily when not adjusting, these locked mode valve 50 front ends are provided with a needle 502, these needle 502 parts pass the opening 42 of outer shell 4, these locked mode valve 50 rear ends are provided with a spool 503, establish one with 503 groups of this spools and adjust ring 51, this

adjustment ring

51 and 50 on locked mode valve are reserved with a variable stroke B, and the stroke B of this

adjustment ring

51 and 50 reservations of locked mode valve is 1cm;

These adjustment ring 51 peripheral rings are provided with a flanging 511, abut against mutually and be positioned in the outer shell 4 with the convex loop order 41 of outer shell 4 inwalls with this flanging 511, this adjustment ring 51 is to offer one in central authorities to wear mouthfuls 512, wears mouthful 512 spools 503 for locked mode valve 50 with this and passes and will adjust ring 51 and the locked mode valve is established for 50 groups;

The outer shell 4 that is equipped with piston 5 is inserted in the template 6 that is provided with a stepped notch 60, make this needle 502 pass template 6 and the hole 70 of subtend mould 7, establish a lid 61 in the top of template 6 spiral shell again outer shell 4 and piston 5 envelopes are located at from body inside;

The continuous Fig. 5 that please refer to is to shown in Figure 7, as Fig. 5, place the normal place of location in the outer shell 4 for piston 5, adjust

ring

51 and 50 strokes that leave 0.5mm of locked mode valve this moment, 4 of piston 5 belows and outer shells leave the gap A that is slightly larger than 0.5mm, turn should be adjusted the stroke B of ring 51 each 0.05mm of transfer, and this adjustment ring 51 is provided with and rings the sheet (not shown), all can produce the sound of prompting in each transfer, as Fig. 6, when having tolerance,

template

6 and 7 on mould make the needle 502 can be on business poor and can't cram mould 7 holes 70 time, but turn adjustment ring 51 make locked mode valve 50 adjust relatively ring 51 in outer shell 4 to bottom offset, the stroke B that adjusts

ring

51 and 50 reservations of locked mode valve is added greatly 1cm from 0.5mm, pressurize matched moulds and prevent the plastics outflow of the hole 70 that needle 502 is moved down and crammed mould 7 really, as Fig. 7, if the tolerance between mould 7 and the template 6 is less or when passing the length of template 6 less than needle 502, oppositely turn adjustment ring 51 make locked mode valve 50 adjust relatively ring 51 in outer shell 4 to top offset, the stroke B that adjusts

ring

51 and 50 reservations of locked mode valve is adjusted to minimum, makes needle 502 can comply with the hole 70 of still cramming mould 7 than closed tolerance really whereby.

Be with, piston 5 of the present utility model is reserved with adjustable stroke B at

adjustment ring

51 and 50 on locked mode valve, can borrow turn adjustment ring 51 to change stroke B again and transfer needle 502 up and down, the tolerance that need not consume 7 on extra measuring time value template 6 and mould when making operation is replaced needle 502, as long as just can adapt to different tolerances and cram the effect that mould 7 holes 70 are reached the pressurization matched moulds really by easy adjustment action.

Claims

1. the piston of an adjustable full line journey is characterized in that, comprising:

One outer shell has an accommodation space and inserts for a piston in this outer shell, this outer shell is offered an opening that is communicated with accommodation space in the piston below, below this piston then and leave a gap between outer shell;

This piston comprises a locked mode valve, and this locked mode valve front end is provided with a needle, and this needle part passes the opening of outer shell, and this locked mode valve rear end group is established one and adjusted ring, is reserved with a variable stroke between this adjustment ring and locked mode valve;

This adjustment ring peripheral ring is provided with a flanging, offsets and is positioned in the outer shell with this flanging and the outer inside wall of cylinder, and turn should adjustments ring makes the locked mode valve adjust relatively in stroke range encircling upper and lower displacement in outer shell, and adjustment encircles the degree that pin passes outer shell whereby.

2. the piston of adjustable full line journey according to claim 1 is characterized in that: the stroke of reserving between described adjustment ring and locked mode valve is 1cm, and the gap that stays between this piston and this outer shell is 1cm at least.

3. the piston of adjustable full line journey according to claim 2 is characterized in that: the described adjustment ring of turn is transferred the stroke of 0.05mm at every turn, and this adjustment is equipped with and rings sheet, all can produce the sound of prompting in each transfer.

4. the piston of adjustable full line journey according to claim 1 is characterized in that: the loop order of described outer inside wall of cylinder moulding one convex, and this loop order abuts against for this flanging and will adjust loop mapping in outer shell;

This adjustment encircles offers one in central authorities and wears mouth, and this locked mode valve rear end is provided with a spool, passes with this spool that mouth will be adjusted ring and locked mode valve group is established.