CN205148827U - Pressurize mechanism of injection molding machine - Google Patents
Pressurize mechanism of injection molding machine Download PDFInfo
- Publication number
- CN205148827U CN205148827U CN201520872304.7U CN201520872304U CN205148827U CN 205148827 U CN205148827 U CN 205148827U CN 201520872304 U CN201520872304 U CN 201520872304U CN 205148827 U CN205148827 U CN 205148827U
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- China
- Prior art keywords
- cylinder
- oil pocket
- control valve
- injection
- cylinder barrel
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- Expired - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a pressurize mechanism of injection molding machine, including hydraulic pump, control valve and injection jar, the control valve setting is provided with the overflow valve between hydraulic pump and the control valve between hydraulic pump and injection jar, and characteristics are provided with supercharging device between control valve and the injection jar. The advantage is through setting up supercharging device between control valve and injection jar, making whole pressurize mechanism to realize high -pressure pressurize with lower force pump work through this supercharging device to reduce the produced energy loss of overflow effectively, had better energy -conserving effect.
Description
Technical field
The utility model relates to a kind of injection machine, especially relates to a kind of pressure-keeping mechanism of molding machine.
Background technology
Injection machine is a kind of special plastic molding press, and it utilizes the thermoplasticity of plastics, and after heat fused, then pressure makes it flow rapidly into die cavity in addition, through pressurize after a while and cooling, becomes the plastic products of various shape.The typical workflow of existing common injection machine is: the reach of matched moulds-penetrate platform puts in place-and preformed-injection-pressurize and cooling-die sinking-eject-preformed.
Injection machine, after injection stage completes, must switch to pressurize, and the contraction formed with supplementary cooling, till being continued until gate freeze.The pressurize oil of current existing constant displacement pump injection machine is generally directly come from hydraulic pump, and the dwell pressure needed due to packing stage is high, but the flow of required pressurize oil is little, and therefore the energy loss that produces of high pressure kicks is very large.
Summary of the invention
Technical problem to be solved in the utility model is to provide the simple and pressure-keeping mechanism of the injection machine that energy loss is little of a kind of structure.
The utility model solves the problems of the technologies described above adopted technical scheme:
A kind of pressure-keeping mechanism of injection machine, comprise hydraulic pump, control valve and injection cylinder, described control valve is arranged between described hydraulic pump and described injection cylinder, be provided with overflow valve between described hydraulic pump and described control valve, between described control valve and described injection cylinder, be provided with supercharging device.
Described supercharging device comprises pressurized cylinder, described pressurized cylinder comprises the first pressurized cylinder and the second pressurized cylinder, the first described pressurized cylinder comprises the first cylinder barrel, the first oil pocket is provided with in the first described cylinder barrel, the second described pressurized cylinder comprises the second cylinder barrel, the second oil pocket is provided with in the second described cylinder barrel, the vertical cross-section of the first described oil pocket is amassed the vertical cross-section being less than the second described oil pocket and is amassed, be provided with in the first described oil pocket and amass with the vertical cross-section of the first described oil pocket the first piston matched, be provided with in the second described oil pocket and amass with the vertical cross-section of the second described oil pocket the second piston matched, described first piston is connected by piston rod with the second described piston, described control valve is connected with the second described oil pocket, described injection cylinder is connected with the first described oil pocket.Supercharging device adopts pressurized cylinder, and structure is simple, and pressurized effect is obvious, and under guarantee carries out the prerequisite of high pressure pressurize to injection cylinder, significantly reduce the energy loss that overflow produces, energy-saving effect is remarkable.
The forward end seal of the first described cylinder barrel is provided with front capping, the back-end sealing of the second described cylinder barrel is provided with rear seal-cover, the rear end of the first described cylinder barrel is connected with the forward end seal of the second described cylinder barrel, the first described oil pocket is connected with the second described oil pocket, described rear seal-cover is provided with fuel feed hole, described front capping is provided with oil outlet, and described fuel feed hole is connected with described control valve, and described oil outlet is connected with described injection cylinder.Be ensure that the stability of pressurized cylinder work by front capping and rear seal-cover, effectively prevent the leakage problem of hydraulic oil, the first oil pocket is connected with the second oil pocket, is convenient to manufacture.
The first described cylinder barrel and the second described cylinder barrel one-body molded.Be convenient to manufacture, decrease assembly process.
Compared with prior art, the utility model has the advantage of: by arranging supercharging device between control valve and injection cylinder, make whole pressure-keeping mechanism can realize high pressure pressurize with lower pressure pump work by this supercharging device, thus significantly reduce the energy loss that overflow produces, there is good energy-saving effect.
Accompanying drawing explanation
Fig. 1 is hydraulic principle schematic diagram of the present utility model;
Fig. 2 is the sectional structure schematic diagram of supercharging device in the utility model;
Fig. 3 is pressure-flow diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, a pressure-keeping mechanism for injection machine, comprises hydraulic pump 1, control valve 2 and injection cylinder 3, and control valve 2 is arranged between hydraulic pump 1 and injection cylinder 3, be provided with overflow valve 4 between hydraulic pump 1 and control valve 2, between control valve 2 and injection cylinder 3, be provided with supercharging device 5.
In this particular embodiment, supercharging device 5 comprises pressurized cylinder, pressurized cylinder comprises the first pressurized cylinder and the second pressurized cylinder, first pressurized cylinder comprises the first cylinder barrel 51, the first oil pocket 52 is provided with in first cylinder barrel 51, second pressurized cylinder comprises the second cylinder barrel 53, the second oil pocket 54 is provided with in second cylinder barrel 53, the vertical cross-section of the first oil pocket 52 is amassed the vertical cross-section being less than the second oil pocket 54 and is amassed, be provided with in first oil pocket 52 and amass with the vertical cross-section of the first oil pocket 52 first piston 55 matched, the second piston 56 amassing with the vertical cross-section of the second oil pocket 54 and match is provided with in second oil pocket 54, first piston 55 is connected by piston rod 57 with the second piston 56, control valve 2 is connected with the second oil pocket 54, injection cylinder 3 is connected with the first oil pocket 52.Supercharging device 5 adopts pressurized cylinder, and structure is simple, and pressurized effect is obvious, and under guarantee carries out the prerequisite of high pressure pressurize to injection cylinder 4, significantly reduce the energy loss that overflow produces, energy-saving effect is remarkable.
In this particular embodiment, the forward end seal of the first cylinder barrel 51 is provided with front capping 58, the back-end sealing of the second cylinder barrel 53 is provided with rear seal-cover 59, the rear end of the first cylinder barrel 51 is connected with the forward end seal of the second cylinder barrel 53, first oil pocket 52 is connected with the second oil pocket 54, rear seal-cover 59 is provided with fuel feed hole 591, and front capping 58 is provided with oil outlet 581, fuel feed hole 591 is connected with control valve 2, and oil outlet 581 is connected with injection cylinder 4.Be ensure that the stability of pressurized cylinder work by front capping 58 and rear seal-cover 59, effectively prevent the leakage problem of hydraulic oil, the first oil pocket 52 is connected with the second oil pocket 54, is convenient to manufacture.
In this particular embodiment, the first cylinder barrel 51 and the second cylinder barrel 53 one-body molded.Be convenient to manufacture, decrease assembly process.
Specific works principle is: it is P1 that hydraulic pump 1 goes out oil pressure, and after pressurized cylinder, oil pressure is upgraded to Ph (equaling the dwell pressure of injection cylinder), P1 < Ph.According to pressurized cylinder force balance principle P1*A1=Ph*Ah(, wherein Ah, A1 are respectively the piston area that first piston 55 and the second piston 56 pass in and out oily side), i.e. the pressure ratio of pressurized cylinder: K=A1/Ah=Ph/P1.Assuming that the pressure ratio of pressurized cylinder is K=A1/Ah=Ph/P1=2, because pressure versus flow long-pending (P*Q) represents power, the energy loss that so overflow produces just reduces 50% of (during without pressurized cylinder) originally, as shown in Figure 2 and Figure 3, wherein 6 what represent is the power that pressurize effectively utilizes, and 7 what represent is the power of spill losses.
Claims (4)
1. the pressure-keeping mechanism of an injection machine, comprise hydraulic pump, control valve and injection cylinder, described control valve is arranged between described hydraulic pump and described injection cylinder, be provided with overflow valve between described hydraulic pump and described control valve, it is characterized in that being provided with supercharging device between described control valve and described injection cylinder.
2. the pressure-keeping mechanism of a kind of injection machine as claimed in claim 1, it is characterized in that described supercharging device comprises pressurized cylinder, described pressurized cylinder comprises the first pressurized cylinder and the second pressurized cylinder, the first described pressurized cylinder comprises the first cylinder barrel, the first oil pocket is provided with in the first described cylinder barrel, the second described pressurized cylinder comprises the second cylinder barrel, the second oil pocket is provided with in the second described cylinder barrel, the vertical cross-section of the first described oil pocket is amassed the vertical cross-section being less than the second described oil pocket and is amassed, be provided with in the first described oil pocket and amass with the vertical cross-section of the first described oil pocket the first piston matched, be provided with in the second described oil pocket and amass with the vertical cross-section of the second described oil pocket the second piston matched, described first piston is connected by piston rod with the second described piston, described control valve is connected with the second described oil pocket, described injection cylinder is connected with the first described oil pocket.
3. the pressure-keeping mechanism of a kind of injection machine as claimed in claim 2, it is characterized in that the forward end seal of the first described cylinder barrel is provided with front capping, the back-end sealing of the second described cylinder barrel is provided with rear seal-cover, the rear end of the first described cylinder barrel is connected with the forward end seal of the second described cylinder barrel, the first described oil pocket is connected with the second described oil pocket, described rear seal-cover is provided with fuel feed hole, described front capping is provided with oil outlet, described fuel feed hole is connected with described control valve, and described oil outlet is connected with described injection cylinder.
4. the pressure-keeping mechanism of a kind of injection machine as claimed in claim 2, it is characterized in that the first described cylinder barrel and the second described cylinder barrel one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520872304.7U CN205148827U (en) | 2015-11-04 | 2015-11-04 | Pressurize mechanism of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520872304.7U CN205148827U (en) | 2015-11-04 | 2015-11-04 | Pressurize mechanism of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205148827U true CN205148827U (en) | 2016-04-13 |
Family
ID=55684562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520872304.7U Expired - Fee Related CN205148827U (en) | 2015-11-04 | 2015-11-04 | Pressurize mechanism of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205148827U (en) |
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2015
- 2015-11-04 CN CN201520872304.7U patent/CN205148827U/en not_active Expired - Fee Related
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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: 20160413 Termination date: 20191104 |