CN207747364U - Multistage mode locking hydraulic control system and injection molding machine - Google Patents
Multistage mode locking hydraulic control system and injection molding machine Download PDFInfo
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- CN207747364U CN207747364U CN201721144318.2U CN201721144318U CN207747364U CN 207747364 U CN207747364 U CN 207747364U CN 201721144318 U CN201721144318 U CN 201721144318U CN 207747364 U CN207747364 U CN 207747364U
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Abstract
The utility model is related to the hydraulic control system fields of injection molding machine, disclose a kind of multistage mode locking hydraulic control system and injection molding machine, the multistage mode locking hydraulic control system, including Mode-locking oil cylinder, it is connected to the rod chamber of the Mode-locking oil cylinder and the first working oil path of rodless cavity and the second working oil path, and the reversal valve of the flexible commutation for controlling the Mode-locking oil cylinder, mode locking back pressure control oil circuit is connected in first working oil path, it is connected with adjustable counterbalance valve on the mode locking back pressure control oil circuit, and for controlling the adjustable counterbalance valve start and stop to control the control valve whether the mode locking back pressure control oil circuit accesses first working oil path, this section mode locking hydraulic control system and injection molding machine can realize that Mode-locking oil cylinder carries out constant backpressure in the case of not pressure release and rises mould, adapt to that size is big or the production of heavy wall moulding.
Description
Technical field
The utility model is related to the hydraulic control systems of injection molding machine, more particularly to a kind of multistage mode locking hydraulic control system
And the injection molding machine with the hydraulic control system.
Background technology
In existing Hydraulic System for Injection Moulding Machine, what injection mold was excessive in order to prevent rise mould and cause to produce product and exist
Defect can generally say that hydraulic circuit is all closed after high-voltage lock mould, until before die sinking, Mode-Locking Cavity is carried out by controlling reversal valve
Pressure release.
And some super large parts, heavy section casting production process in, for prevent injection moulding after part there is contraction distortion, should
Class part needs after injection using lasting mode locking pressurize.It is internal inevitably to exist but since product thickness is big
Internal stress, and continue the release that mode locking pressurize hinders internal stress.If the internal stress of this kind of part is not with resultant force
Mode discharge elimination, product can deform under the action of the internal stress, and moulding quality is affected.
Utility model content
The purpose of this utility model is to overcome the above problems of the existing technology, provide a kind of multistage mode locking hydraulic pressure
Control system and injection molding machine, this section mode locking hydraulic control system can realize that Mode-locking oil cylinder carries out perseverance in the case of not pressure release
Determine back pressure to rise mould, adapts to that size is big or the production of heavy wall moulding.
To achieve the goals above, on the one hand the utility model provides a kind of multistage mode locking hydraulic control system, including lock
The first working oil path and the second working oil path of mould oil cylinder, the rod chamber for being connected to the Mode-locking oil cylinder and rodless cavity, with
And the reversal valve of the flexible commutation for controlling the Mode-locking oil cylinder, the control of mode locking back pressure is connected in first working oil path
Oil circuit, the mode locking back pressure control and are connected with adjustable counterbalance valve on oil circuit, and for controlling the adjustable counterbalance valve start and stop to control
Make the control valve whether the mode locking back pressure control oil circuit accesses first working oil path.
Preferably, the Mode-locking oil cylinder at least has mode locking operating mode and die sinking operating mode, institute under the control of the reversal valve
State control valve be arranged so that the Mode-locking oil cylinder can be controlled under the mode locking operating mode rodless cavity of the Mode-locking oil cylinder with
Constant pressure oil return.
Preferably, the adjustable counterbalance valve is set as proportional pressure-reducing valve, which has control chamber, the control
Chamber is connected to the mode locking back pressure by controlling brancher and controls oil circuit, and the control valve is set on the controlling brancher and by leading
Lead to or separate the controlling brancher.
Preferably, the control valve is set as two-position two-way electromagnetic directional valve, and the two-position two-way electromagnetic directional valve has
One conducting position and a cut-off position, and the cut-off position is set as unidirectionally cutting to the liquid controling cavity from mode locking back pressure control oil circuit
Only, reverse-conducting.
Preferably, the Mode-locking oil cylinder has multiple, and the rod chamber of multiple Mode-locking oil cylinders is commonly connected to the lock
Mould back pressure controls oil circuit.
Preferably, the Mode-locking oil cylinder is pressurizing cylinder.
On the other hand the utility model provides a kind of injection molding machine, which has above-mentioned multistage mode locking hydraulic control system
System.
By using above-mentioned technical proposal, the utility model at least has the advantages that：
(1) for there may be the parts of internal stress in the injection moulding process such as super large part, heavy wall moulding, a kind of energy mistake is provided
Realize the hydraulic control system of segmentation mode locking.It controls oil circuit by connecting mode locking back pressure in the first working oil path so that lock
Rodless cavity oil return two selections of oil of mould oil cylinder：One is the rodless cavity of Mode-locking oil cylinder is taken back into fuel tank as the prior art,
Realize the oil return of rodless cavity；It is another then be by mode locking back pressure control oil circuit on adjustable counterbalance valve carry out constant pressure oil return.Make
Used time, after first time high-voltage lock mould, lasting injection molding starts Mode-locking oil cylinder, in injection moulding process, is made by the control valve
The oil return circuit of the adjustable counterbalance valve access rodless cavity, at this point, the locked mode pressure of Mode-locking oil cylinder is down to the tune of adjustable counterbalance valve
Constant-pressure (when being more than the pressure, pressure oil by it is adjustable can pressure valve pressure release), this set pressure allows the mold mould glacier recession that rises to open
A certain distance, when mold falls back on precalculated position, high-voltage lock mould again, and by controlling the modes such as mode locking speed, make mode locking
Process coordinates the contraction process of product, repeatedly, until injection terminates.This mode can control before normal pressure release (according to one
As Shooting Technique at the time of need pressure release) rodless cavity of Mode-locking oil cylinder carries out pressure release with controllable back pressure, to discharge moulding
Internal stress.
(2) existing mode locking pressure release is connected to fuel tank after handover often through small direction of the traffic valve, at this point, Mode-locking oil cylinder has
Rod cavity return oil pressure depends on the response speed of direction valve, and the flow of direction valve itself is unable to control, the control of Mode-locking oil cylinder
Precision processed is difficult to ensure.In the present solution, adjustable counterbalance valve directly controls the return oil pressure of Mode-locking oil cylinder rodless cavity, Mode-locking oil cylinder
Control accuracy higher.
The other technologies effect of the utility model, will be specifically described in a particular embodiment.
Description of the drawings
Fig. 1 is the schematic diagram of the segmentation mode locking hydraulic control system of the utility model.
Reference sign
1- Mode-locking oil cylinders；2- reversal valves；3- is adjustable counterbalance valve；4- control valves；The first working oil paths of 10-；20- second works
Oil circuit；30- mode locking back pressures control oil circuit；40- controlling branchers.
Specific implementation mode
Firstly the need of explanation, in the following description, the terms such as used " first ", " second " primarily to
More clearly description technique scheme and the differentiation that carries out does not represent between the parts or connecting line mutually distinguished and exists
Substantive difference.
As shown in fig. 1, the multistage mode locking hydraulic control system of a kind of preferred embodiment according to the present utility model, packet
It includes Mode-locking oil cylinder 1 and controls the reversal valve 2 that each Mode-locking oil cylinder 1 carries out flexible commutation.The quantity of Mode-locking oil cylinder 1 is not limited to
It four shown in Fig. 1, can also need to be arranged according to actual use multiple, correspondingly, the quantity of reversal valve 2 increases therewith.
In the utility model, it is three-position four-way electromagnetic directional valve that reversal valve 2, which uses, and the reversal valve 2 preferably has O
Position in type, so that when reversal valve 2 works in middle position, four hydraulic fluid ports of reversal valve 2 are in reliable rest position.Prevent mode locking
It is flexible that accident occurs for oil cylinder.
The first working oil path 10 and the second working oil path 20 are connected separately on the rod chamber and rodless cavity of Mode-locking oil cylinder 1,
Two oil circuits are under the control of reversal valve 2, an oil inlet, an oil return, so that Mode-locking oil cylinder 1 has mode locking operating mode and die sinking work
Condition, and when the rodless cavity of Mode-locking oil cylinder 1 oil inlet/rod chamber oil return, Mode-locking oil cylinder 1 works in mode locking operating mode.
When Mode-locking oil cylinder 1 is in mode locking operating mode, the pressure oil of rod chamber is flowed outwardly by the first working oil path 10.
It is provided with mode locking back pressure oil circuit 30 in first working oil path 10, for controlling the pressure value in the first working oil path 10, and then controls
The oil cylinder chamber oil return oil pressure of lockmaking mould oil cylinder 1.When in hydraulic control system there are when multiple Mode-locking oil cylinders 1, multiple Mode-locking oil cylinders 1
Rod chamber access mode locking back pressure control oil circuit 30 jointly so that each 1 return oil pressure having the same of Mode-locking oil cylinder.
Specifically, it is connected with an adjustable counterbalance valve 3 on mode locking back pressure control oil circuit 30 and one can for controlling this
Adjust the control valve 4 of the intervention state of counterbalance valve 3.Herein, control valve 4 is a two-position two-way electromagnetic directional valve, the bi-bit bi-pass
Solenoid directional control valve has a conducting position and a cut-off position, and the cut-off position of control valve 4 is internally provided with a check valve.
As a kind of embodiment having choosing, adjustable counterbalance valve 3 is selected as proportional pressure-reducing valve, which has control
The control chamber whether proportional pressure-reducing valve works, control chamber are connected to mode locking back pressure by controlling brancher 40 and control on oil circuit 30,
Control valve 4 is set on the controlling brancher 40, and with the oil inlet situation of the control chamber by controlling proportional pressure-reducing valve, regulation and control ratio subtracts
Whether pressure valve accesses mode locking back pressure control oil 30.
In use, the electromagnet DP1 of control valve 4 obtain it is electric so that control valve 4 switches to the conducting of right position, at this point, controlling brancher
There are pressure oil inflow, adjustable counterbalance valve 3 to start to work in 40, the rod chamber oil return of Mode-locking oil cylinder 1 is by mode locking back pressure control oil
Fuel tank is flowed back on road 30, when by adjustable counterbalance valve 3, is acted on by its pressure relief valve port so that return oil pressure is stable and can be with
Adjustment.Especially when adjustable counterbalance valve 3 is selected as electro-hydraulic proportional reducing valve, spool actuating quantity by closed-loop control, Mode-locking oil cylinder 1
The control of rod chamber return pressure is more preferably reliable and stable.
In addition, the utility model also provides a kind of injection molding machine, with above-mentioned multistage mode locking hydraulic control system.
When by the injection molding machine be used as heavy wall, big weight product special process when, when first time high-voltage lock mould, pass through control
The DP1 of valve 4 controls adjustable counterbalance valve 3 and does not work, and the oil circuit 30 of mode locking back pressure control at this time does not work, and realizes setting clamp force.Note
When penetrating, control DP1 obtain it is electric, adjustable counterbalance valve 3 access Mode-locking oil cylinder 1 rodless cavity oil return line on, pass through adjustable counterbalance valve 3
Set pressure realizes Mode-Locking Cavity constant pressure.When injection, due to there is material to press in die cavity, certain mould power that rises is generated, due to mode locking
There are constant clamp forces for chamber, so template passively molds, cavity detaches in mold, discharges interiors of products stress, when mold separates
To setpoint distance, separates mode locking back pressure again and controls oil circuit, and normal high-voltage lock mould works repeatedly to pressure is set,
Reach technological requirement.The mode of segmented mode locking so that twice between high-voltage lock mould, product can cross the inner mold detached by mould sentence
Chamber discharges internal stress, and this release process can carry out repeatedly, after prevention injection molding product due to internal stress problem and
It is deformed.Also, during discharging internal stress, the distance passively molded more can be adjusted accurately.
Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail above in association with attached drawing
In this.In the range of the technology design of the utility model, a variety of simple variants can be carried out to the technical solution of the utility model,
It is combined in any suitable manner including each particular technique feature, in order to avoid unnecessary repetition, the utility model
Various combinations of possible ways are no longer separately illustrated.But these simple variants and combination equally should be considered as the utility model institute
Disclosure belongs to the scope of protection of the utility model.
Claims (7)
1. a kind of multistage mode locking hydraulic control system, including Mode-locking oil cylinder (1), it is connected to having for the Mode-locking oil cylinder (1)
The first working oil path (10) and the second working oil path (20) of rod cavity and rodless cavity, and for controlling the Mode-locking oil cylinder (1)
Flexible commutation reversal valve (2), which is characterized in that be connected on first working oil path (10) mode locking back pressure control oil circuit
(30), it is connected with adjustable counterbalance valve (3) on the mode locking back pressure control oil circuit (30), and for controlling the adjustable counterbalance valve
(3) start and stop are to control the control valve (4) whether the mode locking back pressure control oil circuit (30) accesses first working oil path (10).
2. multistage mode locking hydraulic control system according to claim 1, which is characterized in that the Mode-locking oil cylinder (1) is in institute
Stating, at least there is mode locking operating mode and die sinking operating mode, the control valve (4) to be arranged so that the mode locking under the control of reversal valve (2)
Oil cylinder (1) can control the rodless cavity of the Mode-locking oil cylinder (1) with constant pressure oil return under the mode locking operating mode.
3. multistage mode locking hydraulic control system according to claim 2, which is characterized in that the adjustable counterbalance valve (3) sets
It is set to proportional pressure-reducing valve, which there is control chamber, the control chamber to be connected to the lock by controlling brancher (40)
Mould back pressure controls oil circuit (30), and the control valve (4) is set on the controlling brancher (40) and by being connected or separating the control
Branch (40) processed.
4. multistage mode locking hydraulic control system according to claim 3, which is characterized in that the control valve (4) is set as
Two-position two-way electromagnetic directional valve, the two-position two-way electromagnetic directional valve has a conducting position and a cut-off position, and the cut-off position is set
It is set to from mode locking back pressure control oil circuit (30) to the control chamber unidirectional cutoff, reverse-conducting.
5. multistage mode locking hydraulic control system according to claim 1, which is characterized in that the Mode-locking oil cylinder (1) has more
It is a, and the rod chamber of multiple Mode-locking oil cylinders (1) is commonly connected to the mode locking back pressure control oil circuit (30).
6. multistage mode locking hydraulic control system according to claim 1, which is characterized in that the Mode-locking oil cylinder (1) is to increase
Compressing cylinder.
7. a kind of injection molding machine, which is characterized in that the injection molding machine has the multistage lock as described in any one of claim 1-6
Mould hydraulic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721144318.2U CN207747364U (en) | 2017-09-07 | 2017-09-07 | Multistage mode locking hydraulic control system and injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721144318.2U CN207747364U (en) | 2017-09-07 | 2017-09-07 | Multistage mode locking hydraulic control system and injection molding machine |
Publications (1)
| Publication Number | Publication Date |
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| CN207747364U true CN207747364U (en) | 2018-08-21 |
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ID=63146657
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721144318.2U Active CN207747364U (en) | 2017-09-07 | 2017-09-07 | Multistage mode locking hydraulic control system and injection molding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605695A (en) * | 2018-11-01 | 2019-04-12 | 海天塑机集团有限公司 | A kind of molding method of injection molding machine multistage mode locking |
| CN112648246A (en) * | 2020-12-29 | 2021-04-13 | 湖南中联重科智能高空作业机械有限公司 | Safety detection valve, floating control system and aerial work platform |
-
2017
- 2017-09-07 CN CN201721144318.2U patent/CN207747364U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605695A (en) * | 2018-11-01 | 2019-04-12 | 海天塑机集团有限公司 | A kind of molding method of injection molding machine multistage mode locking |
| CN109605695B (en) * | 2018-11-01 | 2020-06-26 | 海天塑机集团有限公司 | Multi-stage mold locking molding method for injection molding machine |
| CN112648246A (en) * | 2020-12-29 | 2021-04-13 | 湖南中联重科智能高空作业机械有限公司 | Safety detection valve, floating control system and aerial work platform |
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