CN103464758B - A kind of injecting molding die preventing from flowing backwards - Google Patents
A kind of injecting molding die preventing from flowing backwards Download PDFInfo
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- CN103464758B CN103464758B CN201310375143.6A CN201310375143A CN103464758B CN 103464758 B CN103464758 B CN 103464758B CN 201310375143 A CN201310375143 A CN 201310375143A CN 103464758 B CN103464758 B CN 103464758B
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- running channel
- cover half
- groove
- molding die
- half seat
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Abstract
The present invention provides a kind of injecting molding die preventing and flowing backwards, including dynamic model seat and cover half seat with matching, plastic chamber is formed after described dynamic model seat and cover half seat matched moulds, the running channel being connected with described plastic chamber is offered on described cover half seat, the discharging opening of described running channel connects with plastic intracavity portion, it is characterized in that: the outer wall pressing close to described running channel on described cover half seat is further opened with the groove to inner side depression, is provided with chill layer in described groove.A kind of injecting molding die preventing from flowing backwards of the present invention, the groove to inner side depression is offered by pressing close to the outer wall of running channel on cover half seat, chill layer it is provided with in groove, chill layer accelerates liquation rate of cooling in running channel, i.e. accelerate the curing rate of liquation in running channel, melt in die cavity is prevented under pressure by the running channel refluence to running gate system, to reach the purpose preventing flowing backwards after liquation solidification.
Description
Technical field
The present invention relates to a kind of mould for metal powder injection molding, be specifically related to a kind of mould having and preventing refluence function, belong to powder metallurgical technology.
Background technology
Metal Injection Molding is Novel powder metallurgy forming technique modern plastics injection molding technology being introduced field of powder metallurgy and being formed.Its basic craft course is: first that pressed powder is the most mixing with organic adhesive, with curing molding in injection (mo(u)lding) machine injection mould cavity under heating plasticizing state after pelletizing, then will become the bonding agent removing in parison by the method for chemistry or thermal decomposition, last sintered densification obtains final products.Compared with traditional handicraft, there is the features such as precision height, even tissue, excellent performance, production cost are low, be particularly suitable for producing the baroque constitutional detail of small-sized three-dimensional in enormous quantities.
In process of injection molding, after pressurize terminates, plunger or screw retreats, pressure releases in die cavity, at this moment the melting material pressure in die cavity is by higher than the force value at running channel feeding mouth, at this moment in die cavity, melt is flow backwards to running gate system by running channel under pressure so that plastic produces the defects such as contraction, deformation and quality are loose.Mould is the key in plastic parts moulding technique, and therefore, the purpose of the present invention is exactly to go out from the structure of mould to send to prevent the generation of refluence phenomenon after pressurize terminates forming process.
Summary of the invention
In order to solve the deficiency in background technology, it is an object of the invention to overcome the defect of background technology, it is provided that a kind of simple in construction, there is the injecting molding die preventing refluence function.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of injecting molding die preventing from flowing backwards, including dynamic model seat and cover half seat with matching, plastic chamber is formed after described dynamic model seat and cover half seat matched moulds, the running channel being connected with described plastic chamber is offered on described cover half seat, the discharging opening of described running channel connects with plastic intracavity portion, it is characterised in that: the outer wall pressing close to described running channel on described cover half seat is further opened with the groove to inner side depression, is provided with chill layer in described groove.
In a preferred embodiment of the present invention, farther include described chill layer and fill up the inner space of described groove.
In a preferred embodiment of the present invention, farther include described groove and do not contact with the outer wall in plastic chamber in the edge near described plastic chamber.
In a preferred embodiment of the present invention, farther include the degree of depth of described groove from the feeding mouth end of described running channel to described discharge port end by deeply.
In a preferred embodiment of the present invention, farther include depth capacity is described feeding mouth width 3/5ths of described groove.
In a preferred embodiment of the present invention, farther include described running channel and be positioned at the centre position of described cover half seat.
The invention have benefit that: a kind of injecting molding die preventing from flowing backwards of the present invention, the groove to inner side depression is offered by pressing close to the outer wall of running channel on cover half seat, chill layer it is provided with in groove, chill layer accelerates liquation rate of cooling in running channel, i.e. accelerate the curing rate of liquation in running channel, melt in die cavity is prevented under pressure by the running channel refluence to running gate system, to reach the purpose preventing flowing backwards after liquation solidification.Relative to traditional mould, there is novel structure, practicality, be beneficial to the advantage promoted the use of.
Figure of description
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is a structural representation with the injecting molding die preventing refluence function of the present invention.
In figure: 2, dynamic model seat, 4, cover half seat, 6, plastic chamber, 8, running channel, 10, discharging opening, 12, groove, 14, chill layer, 16, feeding mouth.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, and it is understandable to enable the above-mentioned purpose of the present invention, feature and advantage to become apparent from, and below in conjunction with embodiment and embodiment accompanying drawing, the present invention is further detailed explanation.
As shown in Figure 1, a kind of have the injecting molding die preventing liquation refluence function, including dynamic model seat 2 and cover half seat 4 with matching, plastic chamber 6 is formed after dynamic model seat 2 and cover half seat 4 matched moulds, cover half seat 4 offers the running channel 8 being connected with plastic chamber 6, concrete, the discharging opening 10 of running channel 8 connects with the inside in plastic chamber 6, the outer wall pressing close to running channel 8 on cover half seat 4 is further opened with the groove 12 to inner side depression, chill layer 14 it is provided with in groove 12, chill layer 14 accelerates liquation rate of cooling in running channel 8, i.e. accelerate the curing rate of liquation in running channel 8, melt in plastic chamber 6 is prevented to pass through the running channel 8 refluence to running gate system under pressure after liquation solidification, reach the purpose preventing flowing backwards.
Chill layer 14 fills up the inner space of groove 12, and the speed of the area the biggest liquation solidification of chill layer 14 is the fastest, prevents the effect flow backwards more preferable.
As a preferred technical solution of the present invention, groove 12 does not contacts with the outer wall in plastic chamber 6 at the edge near plastic chamber 6, chill layer 14 in groove 12 is only merely the liquation solidification accelerated in running channel 8, have no effect on the natural cooling of the internal liquation in plastic chamber 6, do not interfere with the properties of finished product itself.
In order to make the effect preventing flowing backwards reach to carry out, through experiment repeatedly, draw the concrete structure below in relation to groove 12 and parameter: the degree of depth of groove 12 is gradually deepened to discharging opening 10 end from feeding mouth 16 end of running channel 8, and 3/5ths that the degree of depth of maximum is feeding mouth 16 width, running channel 8 is positioned at the centre position of cover half seat 4, namely groove 12 is positioned at the centre position of cover half seat 4, and this structure is designed to so that preventing the effect flow backwards best on the basis of not affecting product properties.
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are also not restricted by the embodiments; the change made under other any spirit without departing from the present invention and principle, modify, substitute, combine, simplify the substitute mode that all should be equivalence, within being included in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim is defined.
Claims (5)
1. one kind prevents the injecting molding die flow backwards, including dynamic model seat and cover half seat with matching, plastic chamber is formed after described dynamic model seat and cover half seat matched moulds, the running channel being connected with described plastic chamber is offered on described cover half seat, the discharging opening of described running channel connects with plastic intracavity portion, it is characterized in that: the outer wall pressing close to described running channel on described cover half seat is further opened with the groove to inner side depression, is provided with chill layer in described groove；The degree of depth of described groove from the feeding mouth end of described running channel to described discharge port end by deeply.
A kind of injecting molding die preventing from flowing backwards the most according to claim 1, it is characterised in that: described chill layer fills up the inner space of described groove.
A kind of injecting molding die preventing from flowing backwards the most according to claim 2, it is characterised in that: described groove does not contacts with the outer wall in plastic chamber in the edge near described plastic chamber.
A kind of injecting molding die preventing from flowing backwards the most according to claim 3, it is characterised in that: the depth capacity of described groove is 3/5ths of described feeding mouth width.
A kind of injecting molding die preventing from flowing backwards the most according to claim 1, it is characterised in that: described running channel is positioned at the centre position of described cover half seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375143.6A CN103464758B (en) | 2013-08-26 | 2013-08-26 | A kind of injecting molding die preventing from flowing backwards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375143.6A CN103464758B (en) | 2013-08-26 | 2013-08-26 | A kind of injecting molding die preventing from flowing backwards |
Publications (2)
| Publication Number | Publication Date |
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| CN103464758A CN103464758A (en) | 2013-12-25 |
| CN103464758B true CN103464758B (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310375143.6A Active CN103464758B (en) | 2013-08-26 | 2013-08-26 | A kind of injecting molding die preventing from flowing backwards |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107737887B (en) * | 2017-12-04 | 2019-09-24 | 共享装备股份有限公司 | A kind of even wall cylindrical parts cast casting sandbox |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07166208A (en) * | 1993-05-24 | 1995-06-27 | Impac Technol | Method and apparatus for injection molding of slurry |
| CN1876285A (en) * | 2006-07-04 | 2006-12-13 | 北京科技大学 | Microinjection forming mould for metal and ceramic minitype parts forming |
| CN201308994Y (en) * | 2008-11-10 | 2009-09-16 | 王明喜 | Cavity powder injection forming mold of signal isolator |
| CN101535026A (en) * | 2006-09-27 | 2009-09-16 | 日本碍子株式会社 | Sprue bush and its production method |
| CN203495232U (en) * | 2013-08-26 | 2014-03-26 | 苏州米莫金属科技有限公司 | Injection molding mold capable of preventing backflow |
-
2013
- 2013-08-26 CN CN201310375143.6A patent/CN103464758B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07166208A (en) * | 1993-05-24 | 1995-06-27 | Impac Technol | Method and apparatus for injection molding of slurry |
| CN1876285A (en) * | 2006-07-04 | 2006-12-13 | 北京科技大学 | Microinjection forming mould for metal and ceramic minitype parts forming |
| CN101535026A (en) * | 2006-09-27 | 2009-09-16 | 日本碍子株式会社 | Sprue bush and its production method |
| CN201308994Y (en) * | 2008-11-10 | 2009-09-16 | 王明喜 | Cavity powder injection forming mold of signal isolator |
| CN203495232U (en) * | 2013-08-26 | 2014-03-26 | 苏州米莫金属科技有限公司 | Injection molding mold capable of preventing backflow |
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| CN103464758A (en) | 2013-12-25 |
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