CN202826327U - Single-cylinder injection oil way of injection moulding machine - Google Patents
Single-cylinder injection oil way of injection moulding machine Download PDFInfo
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- CN202826327U CN202826327U CN 201220497991 CN201220497991U CN202826327U CN 202826327 U CN202826327 U CN 202826327U CN 201220497991 CN201220497991 CN 201220497991 CN 201220497991 U CN201220497991 U CN 201220497991U CN 202826327 U CN202826327 U CN 202826327U
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Abstract
The utility model discloses a single-cylinder injection oil way of an injection moulding machine. The single-cylinder injection oil way comprises an injection oil cylinder and an injection seat movable oil cylinder, wherein a reversing valve is adopted to control the injecting and pre-moulding of the injection oil cylinder; a two-position four-way valve which is smaller than the reversing valve is used to control the withdrawing action of the injection seat movable oil cylinder. According to the single-cylinder injection oil way provided by the utility model, the characteristic of single-cylinder injection is utilized; a large-drift diameter three-position four-way valve is adopted to control the injecting and pre-moulding action, and a small-drift diameter valve is used to control the withdrawing action; and the flow capacity of each valve is sufficiently utilized to reduce the cost. Meanwhile, the injecting valve and the withdrawing valve are separated, and the area difference of a single-rod injection rod cavity and a single-rod injection rodless cavity is combined to realize a differential injecting function and greatly improve the injecting speed.
Description
Technical field
The utility model relates to a kind of injection oil circuit of injection machine, and particularly single cylinder is injected large latus rectum valve control injection, and little latus rectum valve control is penetrated and moved back, and can realize the asphalt principle of differential injection.
Background technology
As shown in Figure 1, its check valve of injection portion oil circuit V1, the magnetic valve V2 of existing single cylinder injection injection machine moves by injection seat Shift cylinder C1 control seat stand, reversal valve V3 control is injected, is penetrated deactuate and does, the action of storing valve V4 control storing, valve V5, valve V6 control storing back pressure, injection cylinder C2 rodless cavity area A 1, rod chamber area A 2 (calculate and explanation for convenient, suppose A1=2A2).
During injection, the electromagnet D3 of reversal valve V3 gets electric, and system pressure oil enters the injection cylinder rodless cavity from the P mouth of reversal valve V3 through the A mouth, promotes the injection cylinder action, and the oil return of rod chamber is got back to fuel tank by the B mouth of reversal valve through the T mouth.Area A 1=2A2 because of rodless cavity, and injection speed V=Q1/A1=Q2/A2 (Q1 is rodless cavity oil-feed flow, Q2 is rod chamber oil return flow), so Q1=2Q2, when as seen injecting, the flow of the runner of the past T of the B of reversal valve V3 is only for 1/2 of the logical A of P, just as the water of only putting the less water yield with a very large tap, the specification of reversal valve V3 is excessive, has waste.
The utility model content
Technical problem to be solved in the utility model is the single cylinder injection oil circuit that a kind of injection machine is provided for the above-mentioned deficiency that overcomes prior art, makes that it more corresponds to actual needs, more economical pact.
The utility model solves the problems of the technologies described above the technical scheme that adopts: the single cylinder injection oil circuit of injection machine, comprise injection cylinder and injection seat Shift cylinder, adopt reversal valve to control injection and the preformed of injection cylinder, penetrate the deactuate work with one than what the little two-position four-way valve of described reversal valve specification was controlled the injection seat Shift cylinder.
Compared with prior art, the utility model has the advantage of: the characteristics of utilizing the single cylinder injection, adopt the three-position four-way valve of a large latus rectum to control injection and preformed action, control with the valve of a little latus rectum and penetrate the deactuate work, take full advantage of the through-current capability of each valve to reduce cost.Simultaneously, penetrate the separation of moving back valve by injection, in conjunction with the area difference of single cylinder injection rod chamber and rodless cavity, realize the function of differential injection, greatly improve injection speed.
Description of drawings
Fig. 1 is the single cylinder injection asphalt principle figure of existing injection machine.
Fig. 2 is the single cylinder injection asphalt principle figure of the utility model embodiment injection machine.
The specific embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
Oil circuit as shown in Figure 2, adopt a valve V7 with reversal valve V3 same size among Fig. 1 to control injection and preformed, control with a two-position four-way valve V4 than small dimension and to penetrate deactuate and do, the actuator port B of two-position four-way valve V8 links to each other with the rod chamber of injection cylinder C2, oil return inlet T links to each other with fuel tank, and pressure port P communicates with pressure oil P.When injecting like this, D4 gets electric, and system pressure enters the injection cylinder rodless cavity from the P mouth of reversal valve V7 through the B mouth, and the oil return of rod chamber is got back to fuel tank by the BT runner of reversal valve V8, the specification of two-position four-way valve V8 is directly selected by recirculating oil quantity Q2, the waste situation can not occur.
Comparison diagram 1 and Fig. 2, reversal valve V3 is identical with reversal valve V7 specification, and the storing valve V4 among Fig. 1 is identical with the injection flow because of the storing flow, storing valve V4 specification is identical with reversal valve V3, and among Fig. 2, the specification of two-position four-way valve V8 is less than reversal valve V3, therefore cost is minimized.
Introduction valve moves back separating of valve with penetrating simultaneously, because the compression area of oil cylinder rodless cavity and rod chamber is different, under identical pressure, even if simultaneously oil-feed of two chambeies, oil cylinder still can move towards injection direction, therefore when injecting electromagnet D3 and D4 simultaneously electric with regard to realizing the function of differential injection, improve greatly injection speed.
Below be prior art and injection speed computing formula of the present utility model: flow system flow Q, system pressure p, rodless cavity area A 1, rod chamber area A 2, rodless cavity flow Q1, rod chamber flow Q2.
Prior art injection speed: V=Q/A1; The utility model injection speed: V1=Q1/A1=Q2/A2, because of Q1=Q2+Q, V1=Q/ (A1-A2)=V*A1/ (A1-A2) then.
Rod chamber equivalent pressure: P=p (A1-A2)/A1; Take A1=2A2 as example, V1=2V, P=0.5p.
When this shows the utility model, injection speed can be greatly improved, although injection pressure also can descend accordingly, by changing the Area Ratio of A1 and A2, is satisfying under the condition of certain injection pressure, reaches satisfied injection speed speedup value.For example in the situation of speedup 30%, injecting cavity equivalent pressure P=77%p calculates with system pressure 140bar, and P=107bar is in the former sections requirements that can satisfy part mould fully of injection.
Below be the application example of above-mentioned oil circuit in injection machine.
The relevant parameter of injection machine is as follows: flow system flow Q=218L/min, system pressure P=175bar, injection ram diameter D=165mm, injecting piston rod diameter d=120mm.
If by the oil circuit of prior art Fig. 1, make the valve that V4 that storing uses must select 16 latus rectums, adopt V8 behind the utility model Fig. 2 can use the valve of 10 latus rectums, the cost of reduction is the price difference of 2 valves.
The theoretical injection speed 170mm/s of prior art; The theoretical injection speed 320mm/s of the utility model, injection speed improves 89%.
Claims (1)
1. the single cylinder of injection machine is injected oil circuit, comprise injection cylinder and injection seat Shift cylinder, it is characterized in that: adopt reversal valve to control injection and the preformed of injection cylinder, penetrate the deactuate work with one than what the little two-position four-way valve of described reversal valve specification was controlled the injection seat Shift cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497991 CN202826327U (en) | 2012-09-26 | 2012-09-26 | Single-cylinder injection oil way of injection moulding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497991 CN202826327U (en) | 2012-09-26 | 2012-09-26 | Single-cylinder injection oil way of injection moulding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202826327U true CN202826327U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220497991 Expired - Fee Related CN202826327U (en) | 2012-09-26 | 2012-09-26 | Single-cylinder injection oil way of injection moulding machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN202826327U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105415616A (en) * | 2015-12-23 | 2016-03-23 | 宁波瑞宝控制技术有限公司 | Oil channel structure for melt glue of injection molding machine |
| CN111590838A (en) * | 2020-04-16 | 2020-08-28 | 姚惠祥 | Injection reducing cylinder of injection molding machine |
| CN113650252A (en) * | 2021-07-05 | 2021-11-16 | 海天塑机集团有限公司 | Hydraulic control loop for accelerating forming of PET raw material |
| CN114001059A (en) * | 2021-08-25 | 2022-02-01 | 海天塑机集团有限公司 | V-shaped injection hydraulic oil way of injection molding machine |
-
2012
- 2012-09-26 CN CN 201220497991 patent/CN202826327U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105415616A (en) * | 2015-12-23 | 2016-03-23 | 宁波瑞宝控制技术有限公司 | Oil channel structure for melt glue of injection molding machine |
| CN105415616B (en) * | 2015-12-23 | 2018-07-06 | 宁波瑞宝控制技术有限公司 | A kind of injection molding machine melten gel oil channel structures |
| CN111590838A (en) * | 2020-04-16 | 2020-08-28 | 姚惠祥 | Injection reducing cylinder of injection molding machine |
| CN113650252A (en) * | 2021-07-05 | 2021-11-16 | 海天塑机集团有限公司 | Hydraulic control loop for accelerating forming of PET raw material |
| CN114001059A (en) * | 2021-08-25 | 2022-02-01 | 海天塑机集团有限公司 | V-shaped injection hydraulic oil way of injection molding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20180926 |