CN202357392U - Injection mechanism for two-step injection molding - Google Patents
Injection mechanism for two-step injection molding Download PDFInfo
- Publication number
- CN202357392U CN202357392U CN2011204993123U CN201120499312U CN202357392U CN 202357392 U CN202357392 U CN 202357392U CN 2011204993123 U CN2011204993123 U CN 2011204993123U CN 201120499312 U CN201120499312 U CN 201120499312U CN 202357392 U CN202357392 U CN 202357392U
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- China
- Prior art keywords
- injection
- diversion comb
- barrel
- outer lining
- cylinder
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- Expired - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses an injection mechanism for two-step injection molding, which comprises a pre-plastication unit and an injection unit, wherein the injection unit comprises an outer lining of a cylinder, an inner lining of the cylinder, an injection rod, a thrust ring, a check ring, a screw head and a diversion comb; the front end of the diversion comb is inserted in the inner lining of the cylinder and fixed in an inner hole of the outer lining of the cylinder; the inner hole of the outer lining of the cylinder is provided with a step limiting diversion comb; the injection rod is matched with a clearance of the diversion comb; a clearance is provided between the injection rod and an inner wall of the inner lining of the cylinder; the front end of the injection rod is connected with the thrust ring, the check ring and the screw head in order; and the front end of the outer lining of the cylinder is connected with a front cylinder and a nozzle.
Description
Technical field
The utility model relates to the injection structure of injection machine, particularly the injection mechanism of a kind of pair of rank injection moulding.
Background technology
Two rank injection structure of injection machine is generally the preceding endfeed of injecting cavity, and sealing preformed chamber during injection is to prevent feed back.The method in sealing preformed chamber comprises utilizes ball formula check (non-return) valve, the cone valve of spring structure, and little stroke reciprocating type preformed screw rod is non-return, and utilizes oil cylinder or other power unit pull switch to block modes such as material.Wherein, the ball formula check (non-return) valve accuracy of manufacture is had relatively high expectations, and implementation procedure is reliable inadequately, can not well play sealing process.The easy buildup of the device of spring structure causes and uses inconvenience.And little stroke reciprocating type screw rod is non-return with to utilize power unit such as oil cylinder non-return, all has complex structure, shortcomings such as manufacturing cost height.
Summary of the invention
The technical problem that the utility model solved is to overcome above-mentioned shortcoming and injection mechanism that a kind of pair of rank injection moulding is provided, makes structure simpler, is easy to realize.
The technical scheme that the utility model addresses the above problem is:
The injection mechanism of two rank injection moulding; Comprise preformed unit and injecting unit; Injecting unit comprises machine barrel outer lining, machine barrel liner, injection rod, thrust ring, check ring, screw head, diversion comb, and the front end of diversion comb inserts the barrel liner and is fixed together puts into the endoporus of barrel outer lining, and barrel outer lining endoporus is established the spacing diversion comb of step; Injection rod and diversion comb matched in clearance; Injection rod and barrel liner inwall are gapped, and the injection rod front end connects thrust ring, check ring and screw head successively, and barrel outer lining front end connects front barrel and nozzle.
Above-mentioned diversion comb front end is provided with the inclined-plane, to guide from material better.
During two rank injection mouldings injection, from the intermediate feed of injecting cavity, the guiding through diversion comb makes material check ring through front end under pressure; This moment, check ring moved forward under the promotion of material, and passage is opened, and material arrives injecting cavity; During injection, move behind the check ring, end face and thrust ring compress sealing; Prevent the material adverse current, the charging that has realized two stage structure injection portion non-return during with injection.
The advantage of the utility model is: thrust ring, check ring and screw head through being arranged on the injection rod front end can prevent the material adverse current.Use the diversion comb water conservancy diversion to make material can not produce the dead angle in blanking place, thus can buildup.Simultaneously, the matched in clearance of diversion comb and injection rod has guaranteed that material can not leak.
Description of drawings
Fig. 1 is the outline drawing of the utility model embodiment.
Fig. 2 is the injection mechanism structural representation that the utility model embodiment contains two rank injection moulding of injecting unit concrete structure.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is the structural representation of the utility model embodiment diversion comb.
The specific embodiment
Below in conjunction with accompanying drawing embodiment the utility model is done further to describe in detail.
As shown in Figure 1, the injection mechanism of two rank injection moulding comprises preformed unit 1 and injecting unit 2, and 1 effect of preformed unit is that plastic raw materials is plasticized to molten condition, and injecting unit 2 effects are that the material that preformed is good injects mould.
Fig. 2 and Fig. 3 are the concrete structure of injecting unit 2, and the barrel that comprises injection seat 3, injecting unit is double-decker, barrel outer lining 4, front barrel flange 5, nozzle 6, thrust ring 9, check ring 8, screw head 7, barrel liner 10, diversion comb 11 and injection rod 12.
The front end of diversion comb 11 inserts barrel liner 10, through the counterbore on the diversion comb wall diversion comb 11 and barrel liner 10 is connected the endoporus of putting into barrel outer lining 4 with screw, and the step of barrel outer lining 4 endoporus plays position-limiting action to diversion comb 11.
Injection rod 12 adopts matched in clearance with diversion comb 11, prevents material from leakage, and injection rod 12 is gapped with barrel liner 10 inwalls, is the passage that material gets into injecting cavity.
The injection rod front end connects thrust ring 9, check ring 8 and screw head 7 successively.
Barrel outer lining front end connects front barrel flange 5 and nozzle 6.
Fig. 4 partly cuts open figure for diversion comb 11, and the diversion comb front end is provided with inclined-plane 13, sees Fig. 3.The effect of diversion comb 11 is after the material of fusion gets into injecting cavity from feed opening, because the existence on diversion comb front end inclined-plane has good guiding function to material; Material under pressure; Flow forward along the inclined-plane, pass the gap of check ring and screw head, get into injecting cavity.
When preformed unit preformed, material flows into injecting unit by feed opening under the effect of pressure, and material flows forward under pressure under the guiding of diversion comb, promotes the check ring reach, and material gets into the front end of injecting cavity through the gap of check ring and screw head.
During injection, injection rod forward, check ring moves after under the pressure of material, fits with the end face of thrust ring, thereby realizes the effect of sealing, the adverse current of blocking-up material.
Material gets into the front end of injecting cavity through the gap of check ring and screw head, promotes injection rod backward, and in this process with the material compacting, after injection rod falls back on assigned address, stop preformed, thus the metering of realization material.
Claims (2)
1. the injection mechanism of two rank injection moulding; Comprise preformed unit and injecting unit; It is characterized in that: injecting unit comprises machine barrel outer lining, machine barrel liner, injection rod, thrust ring, check ring, screw head, diversion comb, and the front end of diversion comb inserts the barrel liner and is fixed together puts into the endoporus of barrel outer lining, and barrel outer lining endoporus is established the spacing diversion comb of step; Injection rod and diversion comb matched in clearance; Injection rod and barrel liner inwall are gapped, and the injection rod front end connects thrust ring, check ring and screw head successively, and barrel outer lining front end connects front barrel and nozzle.
2. the injection mechanism of as claimed in claim 1 pair of rank injection moulding is characterized in that: described diversion comb front end is provided with the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204993123U CN202357392U (en) | 2011-12-05 | 2011-12-05 | Injection mechanism for two-step injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204993123U CN202357392U (en) | 2011-12-05 | 2011-12-05 | Injection mechanism for two-step injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202357392U true CN202357392U (en) | 2012-08-01 |
Family
ID=46568605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204993123U Expired - Fee Related CN202357392U (en) | 2011-12-05 | 2011-12-05 | Injection mechanism for two-step injection molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202357392U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922655A (en) * | 2012-11-08 | 2013-02-13 | 柳州市欧科塑胶机械成套设备有限公司 | Injection molding machine for unsaturated polyester bulk molding compound |
| CN107672117A (en) * | 2017-11-06 | 2018-02-09 | 威塑机械科技（上海）有限公司 | Injection machine and former |
-
2011
- 2011-12-05 CN CN2011204993123U patent/CN202357392U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922655A (en) * | 2012-11-08 | 2013-02-13 | 柳州市欧科塑胶机械成套设备有限公司 | Injection molding machine for unsaturated polyester bulk molding compound |
| CN102922655B (en) * | 2012-11-08 | 2015-04-29 | 广西柳州中嘉知识产权服务有限公司 | Injection molding machine for unsaturated polyester bulk molding compound |
| CN107672117A (en) * | 2017-11-06 | 2018-02-09 | 威塑机械科技（上海）有限公司 | Injection machine and former |
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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: 20120801 Termination date: 20191205 |