CN109342514A - The dielectric constant measurement method and device of dielectric plastic - Google Patents
The dielectric constant measurement method and device of dielectric plastic Download PDFInfo
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- CN109342514A CN109342514A CN201811025868.1A CN201811025868A CN109342514A CN 109342514 A CN109342514 A CN 109342514A CN 201811025868 A CN201811025868 A CN 201811025868A CN 109342514 A CN109342514 A CN 109342514A
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- dielectric constant
- die cavity
- product
- sample
- injection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
Abstract
The present invention provides a kind of dielectric constant measurement method and device of dielectric plastic, and dielectric constant measurement method includes: that the dynamic model for controlling mold base and cover half mold to form interconnected formed product die cavity and product sampling die cavity；Mobile injection device samples die cavity injection to the formed product die cavity and the product to designated position and according to default injecting condition；Pressure maintaining and cooling preset time；It obtains the sample in the product sampling die cavity and measures the dielectric constant of the sample.Technical solution of the present invention uses identical injected plastics material due to sampling sample and made product, it ensure that the phase same sex of the measuring point with the technological parameter of original part, it ensure that the authenticity of measurement result, and since measurement sampling point is equally with mold injection molding, so the precision and stability of size is there has also been ensuring, to guarantee and the stability and authenticity of dielectric constant measurement result.
Description
Technical field
The present invention relates to plastic injection technique field more particularly to the dielectric constant measurement methods and dress of a kind of dielectric plastic
It sets.
Background technique
Dielectric plastic refers to the plastic cement products with material dielectric constant requirement, is mainly used in communication equipment and electric power
In equipment, the dielectric constant technology stability of material is required relatively high.The dielectric constant measurement scheme of existing dielectric plastic has
Two kinds: the first is sampled in raw material, is molded into specific shape and then is measured in dedicated decameter；
Second is sampled in the finished plastic of injection formed, is cut into specific shape and then in dedicated decameter
Measurement.
Above two scheme has the disadvantage in that for the first measurement scheme, because influencing in entire Shooting Technique
There are many factor of dielectric constant, and measurement scheme is sampled just for raw material, can not detect various parameters pair in Shooting Technique
The limitation of the influence of product dielectric constant, testing result is very big.For second scheme, because being molded various zero wanted
Part, shape difference is very big, is unable to satisfy measurement sampling requirement after the cutting of many shapes, or the dimensional accuracy of sampling cutting is not high
Seriously affect the authenticity of the measurement result in dielectric Changshu.Therefore, it exists in the prior art and dielectric constant of the dielectric material is surveyed
Measure the problem of inaccuracy.
Summary of the invention
The purpose of the present invention is to provide a kind of dielectric constant measurement method and devices of dielectric plastic, to solve existing skill
There is a problem of measuring inaccuracy to dielectric constant of the dielectric material in art.
The invention is realized in this way first aspect present invention provides a kind of dielectric constant measurement method of dielectric plastic,
The dielectric constant measurement method includes:
The dynamic model and cover half for controlling mold base mold to form interconnected formed product die cavity and product sampling die cavity；
Mobile injection device is to designated position and according to default injecting condition to the formed product die cavity and the product
Sample die cavity injection；
Pressure maintaining and cooling preset time；
It obtains the sample in the product sampling die cavity and measures the dielectric constant of the sample.
Second aspect of the present invention provides a kind of dielectric constant measuring apparatus of dielectric plastic, which is characterized in that the dielectric
Constant measuring apparatus includes:
Control module, dynamic model and cover half for controlling mold base mold to form interconnected formed product die cavity and product
Sample die cavity；
Drive module, for moving injection device to designated position and according to default injecting condition to the product forming molds
Chamber and the product sample die cavity injection；
Pressure control module, for pressure maintaining and cooling preset time；
Measurement module samples the sample in die cavity for obtaining the product and measures the dielectric constant of the sample.
The present invention provides a kind of dielectric constant measurement method and device of dielectric plastic, and dielectric constant measurement method includes:
The dynamic model and cover half for controlling mold base mold to form interconnected formed product die cavity and product sampling die cavity；Mobile injection device
Die cavity injection is sampled to the formed product die cavity and the product to designated position and according to default injecting condition；Pressure maintaining and cold
But preset time；It obtains the sample in the product sampling die cavity and measures the dielectric constant of the sample.The technology of the present invention side
Case uses identical injected plastics material, the technique that ensure that measuring point Yu original part due to sampling sample and made product
The phase same sex of parameter ensure that the authenticity of measurement result, and since measurement sampling point is equally to use mold injection molding,
So the precision and stability of size is there has also been ensuring, to guarantee and the stability and authenticity of dielectric constant measurement result.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of flow chart of the dielectric constant measurement method for dielectric plastic that an embodiment of the present invention provides；
Fig. 2 is a kind of structural representation of the dielectric constant measuring apparatus for dielectric plastic that an embodiment of the present invention provides
Figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solution of the present invention, the following is a description of specific embodiments.
The embodiment of the present invention provides a kind of dielectric constant measurement method of dielectric plastic, as shown in Figure 1, the dielectric constant
Measurement method includes:
The dynamic model and cover half of step S10. control mold base mold to form interconnected formed product die cavity and product sampling
Die cavity.
In step slo, mold of the invention is mainly for the production of the dielectric material in communication equipment and power equipment,
It include the basic structure fixed half and moving half of common plastic mould, cover half is corresponding with injection device, sets between dynamic model and cover half
Have to form the interconnected formed product die cavity of product and product sampling die cavity, wherein formed product die cavity is used for according to note
Moulding material forms dielectric plastic product, and formed product die cavity is connected to product sampling die cavity through hole road.
The mobile injection device of step S20. to designated position and according to default injecting condition to the formed product die cavity with
The product samples die cavity injection.
In step S20, injection device is equipped with nozzle, can be mobile by injection device to die cavity injection by nozzle
To designated position, in a kind of embodiment, designated position can be the injection port of the formed product die cavity, and injection device is to institute
It states formed product die cavity injection glue and product is flowed to by connected pore channel and sample die cavity, until glue is full of formed product die cavity
Die cavity is sampled with product；In another embodiment, designated position can be mobile injection device to the formed product die cavity
With the injection port of the connected pore channel of product sampling die cavity, injection device injects glue to the connected pore channel and passes through connection
Duct flows to product sampling die cavity and product sampling die cavity, until glue samples die cavity full of formed product die cavity and product.Make
For a kind of embodiment, the default injecting condition are as follows: injection pressure 75-85bar, injection moulding speed 25-35mm/s, barrel
Temperature is 210 DEG C.
Step S30. pressure maintaining and cooling preset time.
In step s 30, as an implementation, dwell pressure 70-90%, soaking time 30-40min are cold
But mode is classification cooling.
Step S40. obtains the sample in the product sampling die cavity and measures the dielectric constant of the sample.
In step s 40, the sample in product sampling die cavity is taken out in die sinking after the completion of injection molding, by Jie for measuring the sample
The dielectric constant of the available injecting products of electric constant measures the dielectric constant of the sample as an implementation, can be with
For that capacitance method or Resonant-cavity Method etc. can be used more by the dielectric constant of impedance instrument and Network Analyzer test sample
Kind dielectric constant measurement method.As an implementation, using impedance instrument and Network Analyzer, detection circuit is adjusted
Parameter；With the detection signal frequency measurement electromagnetic wave of setting by the phase change before and after medium known to dielectric constant, obtain
Corresponding phase difference；Relationship between obtained phase difference and known dielectric constant establishes the relationship of phase difference and dielectric constant
Model；Adjustment detection signal frequency, establish phase difference and dielectric constant relational model repeatedly, until obtain optimum detection frequency and
Corresponding optimum detection relational model；With optimum detection frequency measurement electromagnetic wave by the phase before and after the unknown medium of dielectric constant
Position variation, obtains corresponding phase difference；Obtained optimum detection relational model, the dielectric that the medium of dielectric constant is calculated are normal
Number completes detection.
Further, the technical program can also realize on-line measurement, and product sampling die cavity includes side wall and bottom plate, described
The moving template of bottom plate and mold constitutes capacitor, is provided with insulating layer between electrode plate and solid plate, and electrode plate and mold
Die cavity contact；Further include convert of capacitor to voltage device, connect with capacitor, is used in entire injection molding process, by capacitor
On capacitance signal be converted into corresponding analog voltage signal；Analog-digital commutator is connect with capacitance voltage converter, and being used for will
The collected analog voltage signal of capacitance voltage converter is converted into corresponding digital voltage signal；Data acquisition device, respectively
It is connect with analog-digital commutator and processor, for acquiring the digital voltage signal of analog-digital commutator generation, and is transmitted to net
In network analyzer, for the dielectric constant of melt in die cavity in the entire injection molding process of Network Analyzer on-line checking.It is being molded
In the process, when it is only air that type is intracavitary, the dielectric constant of detection capacitor is remained unchanged, and corresponding voltage signal remains unchanged, so
After start at the uniform velocity to inject packing material into type chamber, due to packing material dielectric constant be less than air dielectric constant, with
The continuous injection of packing material, voltage signal then become larger therewith, and the dielectric constant of detection reduces therewith, stop injecting into type chamber
The packing material of packing material, liquid begins to cool into solid-state, and the dielectric constant for detecting capacitor is increased therewith, when detection
When dielectric constant is in pre-set interval, determine that the injecting products are qualified products.
Technical solution of the present invention ensure that survey since sampling sample and made product use identical injected plastics material
The phase same sex for measuring position and the technological parameter of original part ensure that the authenticity of measurement result, and due to measuring sampling portion
Position is equally with mold injection molding, so the precision and stability of size is there has also been ensuring, to guarantee and dielectric constant is surveyed
Measure the stability and authenticity of result.
Another kind embodiment of the invention provides a kind of dielectric constant measuring apparatus 20 of dielectric plastic, as shown in Fig. 2, described
Dielectric constant measuring apparatus includes:
Control module 201, dynamic model and cover half for controlling mold base mold to be formed interconnected formed product die cavity and
Product samples die cavity；
Drive module 202, for move injection device to designated position and according to default injecting condition to the product at
Pattern chamber and the product sample die cavity injection；
Modular pressure 203, for pressure maintaining and cooling preset time；
Measurement module 204 samples the sample in die cavity for obtaining the product and measures the dielectric constant of the sample.
The drive module 202 is specifically used on mobile injection device to the injection port of the formed product die cavity.
The drive module 202 is specifically used for mobile injection device to the formed product die cavity and the product sampling mold
On the injection port of the connected pore channel of chamber.
The default injecting condition are as follows:
Injection pressure is 75-85bar, and injection moulding speed 25-35mm/s, barrel temperature is 210 DEG C.
The measurement module 204 includes impedance instrument and Network Analyzer；
The impedance instrument and the Network Analyzer test the dielectric constant of the sample.
Further, the technical program can also realize on-line measurement, and product sampling die cavity includes side wall and bottom plate, described
The moving template of bottom plate and mold constitutes capacitor, is provided with insulating layer between electrode plate and solid plate, and electrode plate and mold
Die cavity contact；Further include convert of capacitor to voltage device, connect with capacitor, is used in entire injection molding process, by capacitor
On capacitance signal be converted into corresponding analog voltage signal；Analog-digital commutator is connect with capacitance voltage converter, and being used for will
The collected analog voltage signal of capacitance voltage converter is converted into corresponding digital voltage signal；Data acquisition device, respectively
It is connect with analog-digital commutator and processor, for acquiring the digital voltage signal of analog-digital commutator generation, and is transmitted to net
In network analyzer, for the dielectric constant of melt in die cavity in the entire injection molding process of Network Analyzer on-line checking.It is being molded
In the process, when it is only air that type is intracavitary, the dielectric constant of detection capacitor is remained unchanged, and corresponding voltage signal remains unchanged, so
After start at the uniform velocity to inject packing material into type chamber, due to packing material dielectric constant be less than air dielectric constant, with
The continuous injection of packing material, voltage signal then become larger therewith, and the dielectric constant of detection reduces therewith, stop injecting into type chamber
The packing material of packing material, liquid begins to cool into solid-state, and the dielectric constant for detecting capacitor is increased therewith, when detection
When dielectric constant is in pre-set interval, determine that the injecting products are qualified products.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of dielectric constant measurement method of dielectric plastic, which is characterized in that the dielectric constant measurement method includes:
The dynamic model and cover half for controlling mold base mold to form interconnected formed product die cavity and product sampling die cavity；
Mobile injection device is sampled to designated position and according to default injecting condition to the formed product die cavity and the product
Die cavity injection；
Pressure maintaining and cooling preset time；
It obtains the sample in the product sampling die cavity and measures the dielectric constant of the sample.
2. dielectric constant measurement method as described in claim 1, which is characterized in that mobile injection device to designated position, packet
It includes:
On mobile injection device to the injection port of the formed product die cavity.
3. dielectric constant measurement method as described in claim 1, which is characterized in that mobile injection device to designated position, packet
It includes:
On mobile injection device to the formed product die cavity and the injection port of product sampling die cavity connected pore channel.
4. dielectric constant measurement method as described in claim 1, which is characterized in that the default injecting condition are as follows:
Injection pressure is 75-85bar, and injection moulding speed 25-35mm/s, barrel temperature is 210 DEG C.
5. dielectric constant measurement method as described in claim 1, which is characterized in that measure the dielectric constant of the sample, wrap
It includes:
The dielectric constant of the sample is tested by impedance instrument and Network Analyzer.
6. a kind of dielectric constant measuring apparatus of dielectric plastic, which is characterized in that the dielectric constant measuring apparatus includes:
Control module, dynamic model and cover half for controlling mold base mold to form interconnected formed product die cavity and product sampling
Die cavity；
Drive module, for move injection device to designated position and according to default injecting condition to the formed product die cavity and
The product samples die cavity injection；
Pressure control module, for pressure maintaining and cooling preset time；
Measurement module samples the sample in die cavity for obtaining the product and measures the dielectric constant of the sample.
7. dielectric constant measuring apparatus as claimed in claim 6, which is characterized in that the drive module is specifically used for mobile note
On injection device to the injection port of the formed product die cavity.
8. dielectric constant measuring apparatus as claimed in claim 6, which is characterized in that mobile injection device to designated position, packet
It includes:
Communicating position of the mobile injection device to the formed product die cavity and product sampling die cavity.
9. dielectric constant measuring apparatus as claimed in claim 6, which is characterized in that the default injecting condition are as follows:
Injection pressure is 75-85bar, and injection moulding speed 25-35mm/s, barrel temperature is 210 DEG C.
10. dielectric constant measuring apparatus as claimed in claim 6, which is characterized in that the measurement module includes testing impedance
Instrument and Network Analyzer；
The impedance instrument and the Network Analyzer test the dielectric constant of the sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811025868.1A CN109342514A (en) | 2018-09-04 | 2018-09-04 | The dielectric constant measurement method and device of dielectric plastic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811025868.1A CN109342514A (en) | 2018-09-04 | 2018-09-04 | The dielectric constant measurement method and device of dielectric plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11493907B2 (en) * | 2019-08-07 | 2022-11-08 | Netzsch Process Intelligence Gmbh | Data acquisition system, system and method for real-time in-line monitoring of industrial manufacturing processes |
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