CN109834918A - A kind of cooling mold of injection molded magnets and control method - Google Patents
A kind of cooling mold of injection molded magnets and control method Download PDFInfo
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- CN109834918A CN109834918A CN201910170516.3A CN201910170516A CN109834918A CN 109834918 A CN109834918 A CN 109834918A CN 201910170516 A CN201910170516 A CN 201910170516A CN 109834918 A CN109834918 A CN 109834918A
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- cooling
- cooling duct
- injection molded
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- permanent magnet
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Abstract
The present invention provides a kind of cooling mold of injection molded magnets and control method, the cooling mold of the injection molded magnets includes the product cavity that mode, the type core being assemblied in the mode and the mode and the type core surround, the mode offers several mutually independent annular cooling channels, each cooling duct is looped around the product cavity periphery and is axially uniformly distributed along the product cavity, and each cooling duct is equipped with an import and an outlet.The cooling mold of injection molded magnets of the present invention and control method can guarantee that the product outer diameter shrinking percentage after forming is axially distributed consistent, i.e. product outer diameter axial direction uniformity is good, and using effect is good.
Description
Technical field
The present invention relates to magnet injection molding technology field, in particular to a kind of injection molded magnets cooling mold and control method.
Background technique
Traditional upper magnet is prepared by the method or molding bonded method of sinter molding, although magnetic property
Height, but the sophisticated product of not easily molded labyrinth.As plastic processing technology and mold are orientated the progress for the technology that magnetizes, more
Carry out more magnets to prepare using the method for injection molding.Compared to sintering method, magnet is prepared using the method for injection molding and is had
The advantages of have: product size precision is high, and mechanical strength is good, the complicated easily multipole orientation of shape of product, high production efficiency, in recent years
To quick development.
Although the technique of injection molding prepare magnet have the advantages that it is more, however, after traditional cooling die forming
Product outer diameter shrinking percentage is axially distributed inconsistent, i.e. product outer diameter axial direction uniformity is poor, influences using effect.
In consideration of it, the present invention provides a kind of cooling mold of novel injection molding magnet and control method, to overcome above-mentioned existing skill
Art there are the problem of.
Summary of the invention
The object of the present invention is to provide a kind of cooling mold of injection molded magnets and control methods, to obtain outer diameter axial direction uniformity
Good product, it solves the above-mentioned problems of the prior art.
To achieve the above object, one technical scheme adopted by the invention is that: the cooling mold of the injection molded magnets comprising mould
The product cavity that benevolence, the type core being assemblied in the mode and the mode and the type core surround, the mode offer
Several mutually independent annular cooling channels, each cooling duct are looped around the product cavity periphery and along the products
Cavity is axially uniformly distributed, and each cooling duct is equipped with an import and an outlet.
The cooling duct includes being sequentially distributed to lead in the first cooling duct of the mode, the second cooling from top to bottom
Road, third cooling duct and the 4th cooling duct.
Fused raw material is filled in the product cavity, and permanent magnet magnetic ring, each cooling duct are formed after cooling and shaping
Inner sidewall is L at a distance from the permanent magnet magnetic ring outer wall.
The wall thickness of the permanent magnet magnetic ring is A, and the length of the permanent magnet magnetic ring is B, and A=0.4L, 8A≤B≤12A.
The mode has axially through upper and lower installation cavity, and the installation cavity includes upper section and lower section, in the lower section
Diameter is greater than the upper section internal diameter, and the type core is assemblied in the installation cavity.
The inlet and outlet is symmetrically distributed in the mode two sides, the import and the outlet and the product cavity
It is perpendicular.
A kind of control method of the cooling mold of injection molded magnets:
Obtain heat transfer oil temperature T1 and flow Q1 in first cooling duct, oil temperature of conducting heat in second cooling duct
Spend relational expression (T2*Q2) between T2 and flow Q2, the wall thickness A of the permanent magnet magnetic ring and the length B of the permanent magnet magnetic ring/
(T1*Q1)=(1+A/B)；According to the relational expression, conduct heat oil temperature T1, flow Q1 and institute are set in first cooling duct
It is equal to state conduct heat in the 4th cooling duct oil temperature T4, flow Q4, while heat transfer oil temperature in second cooling duct is set
T2, flow Q2 are equal with conduct heat in the third cooling duct oil temperature T3, flow Q3.
Default end value, institute are no more than using the permanent magnet magnetic ring outer diameter axial direction distributing homogeneity Z value that the control method obtains
State Z=MAX (Φ 1, Φ 2, Φ 3, Φ 4)-MIN (Φ 1, Φ 2, Φ 3, Φ 4), wherein Φ 1 indicates that first cooling duct is straight
Diameter size, Φ 2 indicate second cooling duct diameter, and Φ 3 indicates third cooling duct diameter, 4 table of Φ
Show the 4th cooling duct diameter.
Compared with prior art, a kind of cooling mold of injection molded magnets of the present invention and control method the utility model has the advantages that design phase
Mutual independent first cooling duct, the second cooling duct, third cooling duct and the 4th cooling duct, and rule of thumb formula is set
Temperature and the flow of each cooling duct are set to adjust the uniformity that permanent magnet magnetic ring shrinking percentage is distributed along outer diameter, after causing forming
Product outer diameter is axially distributed consistent, and using effect is good.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is a kind of cooling die cut view of injection molded magnets of the present invention.
Specific embodiment
The present invention is explained in detail with reference to the accompanying drawing, but it is emphasized that following embodiment is
Illustratively, the range and application being not intended to be limiting of the invention.
Please refer to Fig. 1, the cooling mold of a kind of injection molded magnets of the invention, including mode 1, the type core 2 being assemblied in mode 1
And the product cavity 3 that mode 1 and type core 2 surround.When product shaping, fused raw material filling enters in product cavity 3, after cooling
The forming of permanent magnet magnetic ring 4 is completed.
Mode 1 has axially through upper and lower installation cavity 11, and installation cavity 11 includes upper section 111 and lower section 112, middle and lower sections
112 internal diameters are greater than 111 internal diameter of upper section, and type core 2 is assemblied in the installation cavity 11 of mode 1.The substantially T-type of type core 2, after assembly, type
Core 2 and mode 1 surround product cavity 3.Mode 1 offers several annular cooling channels, which is looped around product cavity 3
Periphery is simultaneously axially vertical with product cavity 3.In the present embodiment, mode 1 offers mutually indepedent and equally distributed annular first
Cooling duct 12, the second cooling duct 13, third cooling duct 14 and the 4th cooling duct 15.Four annular cooling channels are along forever
Magnet magnet ring 4 is axial to be uniformly distributed.First cooling duct 12, the second cooling duct 13, third cooling duct 14 and the 4th are cooling
Channel 15 is equipped with an import 16 and an outlet 17, and import 16 and outlet 17 are distributed in 1 two sides of mode.Wherein, first is cooling logical
Road 12, the second cooling duct 13, the distance of third cooling duct 14 and the 4th cooling duct 15 apart from permanent magnet magnetic ring 4 are L, this
L >=5mm in embodiment.
The cooling medium of cooling mold is heat-transfer oil, in addition, cooling mold external temperature device and flow regulator.Cooling mould
When having work, the first cooling duct 12, the second cooling duct 13, third cooling duct 14 and the 4th cooling duct 15 are respectively turned on
Heat-transfer oil, heat-transfer oil are flowed by each import 16, then, from each 17 outflow of outlet, pass through protractor and flow regulator control
Make the temperature and flow of heat-transfer oil in each cooling duct.When product shaping, fused raw material filling enters in product cavity 3, high temperature
The heat-transfer oil that the heat of raw material is recycled is taken away, and 4 cooling forming of permanent magnet magnetic ring, four annular cooling channels are along permanent magnet magnetic ring
4 are axially uniformly distributed, it is ensured that the axially distributed uniformity of 4 outer diameter of permanent magnet magnetic ring after forming is good, 4 outside journal axle of permanent magnet magnetic ring
It is indicated to distributing homogeneity with Z, Z=MAX (Φ 1, Φ 2, Φ 3, Φ 4)-MIN (Φ 1, Φ 2, Φ 3, Φ 4), and Z value is no more than
Default end value, in the present embodiment, default end value is set as 0.02mm, wherein Φ 1 indicates 12 diameter of the first cooling duct, Φ 2
Indicate 13 diameter of the second cooling duct, Φ 3 indicates 14 diameter of third cooling duct, and Φ 4 indicates the 4th cooling duct
15 diameters.
When cooling forming, permanent magnet magnetic ring outer diameter shrinking percentage is axially distributed related to cooling field strength, uses conventional chilling
Permanent magnet magnetic ring uniform external diameter Z value after die forming is usually in 0.1mm or so.It is cold that the present invention designs four independent annulars
But channel, and temperature T and flow Q by controlling heat-transfer oil in each cooling duct are outer to adjust 4 shrinking percentage of permanent magnet magnetic ring edge
The uniformity of diameter distribution.
The control method of the cooling mold of injection molded magnets of the present invention: conduct heat in the first cooling duct oil temperature T1 and flow are obtained
In Q1, the second cooling duct conduct heat oil temperature T2 and flow Q2, permanent magnet magnetic ring wall thickness A and permanent magnet magnetic ring length B it
Between empirical equation (T2*Q2)/(T1*Q1)=(1+A/B) wherein, A indicate permanent magnet magnetic ring 4 wall thickness, B indicate permanent magnet magnetic
The length of ring 4, T1 indicate the temperature of heat-transfer oil in the first cooling duct, and Q1 indicates the flow of heat-transfer oil in the first cooling duct,
T2 indicates the temperature of heat-transfer oil in the second cooling duct, the flow of heat-transfer oil in the second cooling duct of Q2 expression, in the present embodiment,
A=0.4L, 8A≤B≤12A；According to the empirical equation, conduct heat oil temperature T1, flow Q1 and the are set in the first cooling duct
Heat transfer oil temperature T4, flow Q4 are equal in four cooling ducts, while conduct heat oil temperature T2, flow Q2 is arranged in the second cooling duct
It is equal with conduct heat in third cooling duct oil temperature T3, flow Q3, it is ensured that the permanent magnet magnetic ring outer diameter after forming is axially distributed
Uniformity Z value≤0.02mm.
After cooling forming, the Z value of permanent magnet magnetic ring is excessive be shunk due to inner wall it is axially distributed it is inconsistent caused by.Due to
Cooling duct temperature T is higher, flow Q is bigger, and the shrinkage of inner wall is smaller, and inner wall shrinkage is directly affected by cooling condition, i.e.,
As (Q1 ≈ Q4) > (Q2 ≈ Q3), the rule showed is that the big centre in permanent magnet magnetic ring both ends is small.So the present invention is gram
The above problem is taken, the first cooling duct temperature T1 and flow are confirmed by (T2*Q2)/(T1*Q1)=(1+A/B) relational expression
Q1, the second cooling duct temperature T2 and flow Q2, third cooling duct temperature T3 and flow Q3, the 4th cooling duct temperature T4 and
The regulative mode of flow Q4, and the inner wall shrinkage of product different parts is controlled using cooling method is classified, to control Z
Value.
Certainly, those skilled in the art in the art are it should be appreciated that above-described embodiment is intended merely to illustrate this hair
It is bright, and be not used as limitation of the invention, if in spirit of the invention, to the variation of above-described embodiment,
Modification will all be fallen within the scope of the claims.
Claims (8)
1. a kind of cooling mold of injection molded magnets comprising mode, the type core being assemblied in the mode and the mode and institute
The product cavity that the type core of stating surrounds, it is characterised in that: the mode offers several mutually independent annular cooling channels, each
The cooling duct is looped around the product cavity periphery and is axially uniformly distributed along the product cavity, and each cooling is logical
Road is equipped with an import and an outlet.
2. the cooling mold of injection molded magnets as described in claim 1, it is characterised in that: the cooling duct include from top to bottom according to
Secondary the first cooling duct for being distributed in the mode, the second cooling duct, third cooling duct and the 4th cooling duct.
3. the cooling mold of injection molded magnets as claimed in claim 2, it is characterised in that: filling melting is former in the product cavity
Material, forms permanent magnet magnetic ring, each cooling duct inner sidewall is at a distance from the permanent magnet magnetic ring outer wall after cooling and shaping
For L.
4. the cooling mold of injection molded magnets as claimed in claim 3, it is characterised in that: the wall thickness of the permanent magnet magnetic ring is A, institute
The length of permanent magnet magnetic ring is stated as B, and A=0.4L, 8A≤B≤12A.
5. the cooling mold of injection molded magnets as claimed in claim 4, it is characterised in that: the mode has axially through upper and lower
Installation cavity, the installation cavity include upper section and lower section, and the lower section internal diameter is greater than the upper section internal diameter, and the type core is assemblied in institute
It states in installation cavity.
6. the cooling mold of injection molded magnets as claimed in claim 5, it is characterised in that: the inlet and outlet is symmetrically distributed in institute
Mode two sides are stated, the import and the outlet are perpendicular with the product cavity.
7. a kind of control method of the cooling mold of injection molded magnets comprising the cooling mold of injection molded magnets in claim 2 to 6,
It is characterized by: obtaining heat transfer oil temperature T1 and flow Q1 in first cooling duct, conducting heat in second cooling duct
Relational expression (T2* between the length B of oil temperature T2 and flow Q2, the wall thickness A of the permanent magnet magnetic ring and the permanent magnet magnetic ring
Q2)/(T1*Q1)=(1+A/B)；According to the relational expression, conduct heat oil temperature T1, flow Q1 are set in first cooling duct
It is equal with conduct heat in the 4th cooling duct oil temperature T4, flow Q4, while heat-transfer oil in second cooling duct is set
Temperature T2, flow Q2 are equal with conduct heat in the third cooling duct oil temperature T3, flow Q3.
8. the control method of the cooling mold of injection molded magnets as claimed in claim 7, it is characterised in that: obtained using the control method
The permanent magnet magnetic ring outer diameter axial direction distributing homogeneity Z value obtained is no more than default end value, the Z=MAX (Φ 1, Φ 2, Φ 3, Φ
4)-MIN (Φ 1, Φ 2, Φ 3, Φ 4), wherein Φ 1 indicates first cooling duct diameter, and Φ 2 indicates described second
Cooling duct diameter, Φ 3 indicate third cooling duct diameter, and Φ 4 indicates the 4th cooling duct diameter
Size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910170516.3A CN109834918A (en) | 2019-03-07 | 2019-03-07 | A kind of cooling mold of injection molded magnets and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910170516.3A CN109834918A (en) | 2019-03-07 | 2019-03-07 | A kind of cooling mold of injection molded magnets and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109834918A true CN109834918A (en) | 2019-06-04 |
Family
ID=66885443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910170516.3A Pending CN109834918A (en) | 2019-03-07 | 2019-03-07 | A kind of cooling mold of injection molded magnets and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109834918A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205929379U (en) * | 2016-08-08 | 2017-02-08 | 马鞍山福亨汽车内饰有限公司 | Injection mold's cooling tube measuring device |
| CN109080082A (en) * | 2018-08-28 | 2018-12-25 | 苏州格瑞林达医疗科技有限公司 | A kind of injection mold of electric appliance silica gel part |
| CN209794470U (en) * | 2019-03-07 | 2019-12-17 | 太仓维品精密科技有限公司 | Injection molding magnet cooling mold |
-
2019
- 2019-03-07 CN CN201910170516.3A patent/CN109834918A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205929379U (en) * | 2016-08-08 | 2017-02-08 | 马鞍山福亨汽车内饰有限公司 | Injection mold's cooling tube measuring device |
| CN109080082A (en) * | 2018-08-28 | 2018-12-25 | 苏州格瑞林达医疗科技有限公司 | A kind of injection mold of electric appliance silica gel part |
| CN209794470U (en) * | 2019-03-07 | 2019-12-17 | 太仓维品精密科技有限公司 | Injection molding magnet cooling mold |
Non-Patent Citations (1)
| Title |
|---|
| 张金升: "纳米磁性液体的制备及其性能表征", 哈尔滨工业大学出版社, pages: 11 - 12 * |
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