CN203818519U - Non-hydrostomia injection molding hydraulic control system - Google Patents
Non-hydrostomia injection molding hydraulic control system Download PDFInfo
- Publication number
- CN203818519U CN203818519U CN201420266533.XU CN201420266533U CN203818519U CN 203818519 U CN203818519 U CN 203818519U CN 201420266533 U CN201420266533 U CN 201420266533U CN 203818519 U CN203818519 U CN 203818519U
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- Prior art keywords
- injection
- oil
- control system
- hydraulic motor
- rodless cavity
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- Expired - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
- Check Valves (AREA)
Abstract
The utility model discloses a non-hydrostomia injection molding hydraulic control system which comprises a fuel tank (1), a hydraulic motor (2), an injection oil cylinder (3) and an injection valve (4), wherein the oil outlet of the injection valve (4) is connected with the oil return opening of the fuel tank (1); the oil outlet of the hydraulic motor (2) is directly connected with the rodless cavity (3.1) of the injection oil cylinder (3) through a pipeline; a one-way valve (5) for controlling oil to flow from the hydraulic motor (2) to the rodless cavity (3.1) of the injection oil cylinder (3) is further mounted on the pipeline; the rodless cavity (3.1) of the injection oil cylinder (3) is further connected with the oil inlet of the injection valve (4). The non-hydrostomia injection molding hydraulic control system can eliminate the hydrostomia phenomenon.
Description
Technical field
The utility model relates to injection-moulding device technical field, is specifically a kind of without salivation injection moulding hydraulic control system.
Background technology
Plastic-injection moulding machine generally adopts injection cylinder and hydraulic motor structure, by injection ram, in oil cylinder, moves around, and drives screw rod to realize injection, penetrates deactuate work, by hydraulic motor, drives shaft coupling drive screw to rotate plasticizing action.During plasticizing, screw rod rotation is carried plastic grain to barrel front end, and plastic grain is fusing gradually under the effect of barrel external heat and screw rod rotational shear, at screw front end, assembles.Because barrel front end nozzle bore is very little, the molten plastic of being on the increase produces thrust, by screw rod together with shaft coupling, hydraulic motor, penetrate plate and injection ram after platform and promote backward, now injection cylinder rodless cavity by introduction valve from fuel tank oil suction, in injection cylinder rod chamber, hydraulic oil is by overflow valve oil return, the system oil return of hydraulic motor directly flows back to fuel tank, and the oil-out of hydraulic motor is directly connected with fuel tank by pipeline.
Because existence is penetrated after platform plate and penetrates the frictional force between platform guide rod, frictional force between injection cylinder and injection ram, piston rod, and the flow resistance of hydraulic oil, screw rod astern speed is lower than molten plastic aggregation velocity, partial melting plastics can flow out from nozzle bore, and this phenomenon is called salivation.In Plastic Injection Shaping Process, produce salivation, can cause wastage of material, cause unstable product quality, reduce product percent of pass.
Utility model content
The technical problems to be solved in the utility model is that a kind of injection moulding hydraulic control system of eliminating salivation phenomenon is provided.
For solving the problems of the technologies described above, the technical solution of the utility model is, comprise fuel tank, hydraulic motor, injection cylinder and introduction valve, the oil-out of described introduction valve is connected with the oil return opening of fuel tank, the oil-out of described hydraulic motor is directly connected with the rodless cavity of injection cylinder by pipeline, on this pipeline, be also provided with and control the oily check valve that flows to injection cylinder rodless cavity from hydraulic motor, the rodless cavity of described injection cylinder is also connected with the oil-in of introduction valve.
The utility model compared with prior art, have the following advantages: injection moulding hydraulic control system of the present utility model accesses the system oil return of hydraulic motor the rodless cavity of injection cylinder by check valve, the pressure that utilizes oil return by screw rod together with shaft coupling, hydraulic motor, penetrating plate and injection ram after platform promotes backward, overcome the resistance of motion and the frictional force of each parts, make screw rod astern speed be greater than molten plastic aggregation velocity, avoided partial melting plastics to flow out from barrel front end nozzle bore, eliminated the generation of salivation phenomenon, and system oil return unnecessary in injection cylinder rodless cavity flows back into fuel tank by introduction valve, played safety guarantee effect, also avoided waste simultaneously.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram without salivation injection moulding hydraulic control system of prior art.
Fig. 2 is the hydraulic schematic diagram without salivation injection moulding hydraulic control system of the present utility model.
Shown in figure, 1, fuel tank, 2, hydraulic motor, 3, injection cylinder, 3.1, rodless cavity, 4, introduction valve, 5, check valve.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Of the present utility model without salivation injection moulding hydraulic control system, comprise fuel tank 1, hydraulic motor 2, injection cylinder 3 and introduction valve 4.The oil-out of described introduction valve 4 is connected with the oil return opening of fuel tank 1, unlike the prior art, the oil-out of described hydraulic motor 2 is directly connected with the rodless cavity 3.1 of injection cylinder 3 by pipeline, is also provided with and controls the oily check valve 5 that flows to injection cylinder 3 rodless cavities 3.1 from hydraulic motor 2 on this pipeline.The rodless cavity 3.1 of described injection cylinder 3 is also connected with the oil-in of introduction valve 4.
In the present embodiment, described check valve 5 is tubular type check valve, and this tubular type check valve is highly suitable for hydraulic system, very accurate to the control flowing to.The function model of described introduction valve 4 is that meta A, B, T are logical, and the introduction valve of the type has the feature of low energy consumption and multiple mounting modes.
Of the present utility model without salivating injection moulding hydraulic control system by the rodless cavity through check valve access injection cylinder by hydraulic motor system oil return, the pressure that utilizes oil return by screw rod together with shaft coupling, hydraulic motor, penetrate plate and injection ram after platform and promote backward, overcome the resistance of motion and the frictional force of each parts, make screw rod astern speed be greater than molten plastic aggregation velocity, avoid partial melting plastics to flow out from barrel front end nozzle bore, eliminated the generation of salivation phenomenon.
Claims (3)
1. a nothing salivates injection moulding hydraulic control system, comprise fuel tank (1), hydraulic motor (2), injection cylinder (3) and introduction valve (4), the oil-out of described introduction valve (4) is connected with the oil return opening of fuel tank (1), it is characterized in that: the oil-out of described hydraulic motor (2) is directly connected with the rodless cavity (3.1) of injection cylinder (3) by pipeline, on this pipeline, be also provided with and control the oily check valve (5) that flows to injection cylinder (3) rodless cavity (3.1) from hydraulic motor (2), the rodless cavity (3.1) of described injection cylinder (3) is also connected with the oil-in of introduction valve (4).
2. according to claim 1 without salivation injection moulding hydraulic control system, it is characterized in that: described check valve (5) is tubular type check valve.
3. according to claim 1 without salivation injection moulding hydraulic control system, it is characterized in that: the function model of described introduction valve (4) is that meta A, B, T are logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266533.XU CN203818519U (en) | 2014-05-22 | 2014-05-22 | Non-hydrostomia injection molding hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266533.XU CN203818519U (en) | 2014-05-22 | 2014-05-22 | Non-hydrostomia injection molding hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203818519U true CN203818519U (en) | 2014-09-10 |
Family
ID=51474061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420266533.XU Expired - Fee Related CN203818519U (en) | 2014-05-22 | 2014-05-22 | Non-hydrostomia injection molding hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203818519U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476234A (en) * | 2015-08-25 | 2017-03-08 | 宁波优诺姆机械有限公司 | A kind of hydraulic circuit structure |
-
2014
- 2014-05-22 CN CN201420266533.XU patent/CN203818519U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476234A (en) * | 2015-08-25 | 2017-03-08 | 宁波优诺姆机械有限公司 | A kind of hydraulic circuit structure |
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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 |
Granted publication date: 20140910 Termination date: 20170522 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |