CN107246927A - A kind of plastics knockout press testing mould and its method of testing - Google Patents
A kind of plastics knockout press testing mould and its method of testing Download PDFInfo
- Publication number
- CN107246927A CN107246927A CN201610267930.2A CN201610267930A CN107246927A CN 107246927 A CN107246927 A CN 107246927A CN 201610267930 A CN201610267930 A CN 201610267930A CN 107246927 A CN107246927 A CN 107246927A
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- China
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- cover half
- plastics
- knockout press
- pressure sensor
- thimble
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
Abstract
The invention discloses a kind of plastics knockout press testing mould and its method, complete, comprehensive testing mould can be carried out to plastic pellet by solving one, and the evaluation for the release property of plastic pellet causes certain difficulty.Its drip irrigation device is that the liftout attachment includes liftout plate and thimble, the thimble groove worn for thimble is provided with the bottom plate of cover half, two relative side plates of cover half mutually pivot enable with bottom plate and outwards overturn 0.2 ° ~ 5 ° to form its corresponding draft angle, and fixed by corresponding fixing device, bottom plate and side wall on the inside of the cover half are provided with pressure sensor, also include a pressure end, and the detection signal of pressure sensor is passed through into a processing unit processes.Reach that the relative side plate of the two of which of its cover half can be realized to be pivoted out to realize different draw tapers, its angle changing is quick and convenient, greatlyd save the cycle of adjustment draft angle complete detection, comprehensively and accurately data can be obtained.
Description
Technical field
The present invention relates to mould applications, in particular, it is related to a kind of testing mould for being used to test plastics knockout press and the method on testing plastics knockout press.
Background technology
With the fast development of mould industry, various moulds are widely used in the high volume manufacturing process of industrial products.Usually, injection-molded item will carry out processing and forming by corresponding mould, one injection-molded item takes out from mould cavity or core rod after overmolding, solidification and is commonly called as the demoulding, and it is one of major reason of injection-molded item mass defect and influence production efficiency to be stripped bad.If demolding performace is poor; the problems such as product deformation, thimble white seal, dimensional discrepancy can be produced; if demolding performace is bad; adhesion residual of the material on metal barrel can be easily caused, and then impurity is decomposed into coking, gently then causes surface particles pit; it is heavy then cause surface scratch, ripple; the surface appearance of serious infringement product just to it is above-mentioned have central the problem of, whether the mould emptier design in mould reasonable, directly influences the surface quality and physical property of product.It is accomplished by monitoring injection molding, pressurize cooling, demoulding ejection stage in real time the pressure of mould inside, so that the demolding performace to evaluate plastic pellet, but complete, comprehensive testing mould can be carried out to plastic pellet by not having one among current prior art, the evaluation for the release property of plastic pellet causes certain difficulty.
The content of the invention
The present invention the first goal of the invention be to provide it is a kind of have can fast and easy comprehensively test different draft angles for side wall and the testing mould of the knockout press of bottom wall.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of plastics knockout press testing mould, including injection device, dynamic model, cover half and liftout attachment, it is characterized in that, the liftout attachment includes liftout plate and thimble, the thimble groove worn for thimble is provided with the bottom plate of the cover half, two relative side plates of the cover half mutually pivot enable with bottom plate and outwards overturn 0.2 ° ~ 5 ° to form its corresponding draft angle, and fixed by corresponding fixing device, bottom plate and side wall on the inside of the cover half are provided with pressure sensor, also include a pressure end, the pressure end is coupled with the pressure sensor, and the detection signal of pressure sensor is passed through into a processing unit processes, the initial knockout press of final output.
By using above-mentioned technical proposal, serve the simulation of real simple injection mold, it can realize by being internally provided with least one pressure sensor in dynamic model, and pressure sensor is connected with extraneous pressure end, serving can be for the injection molding inside cover half, pressurize is cooled down, the pressure for being stripped ejection stage mould inside carries out examinations, and by processing unit processes after, feed back at pressure end, it is small with cost, detect the reliable effect of data, and due to it is also often desirable to adjust draw taper among knockout course, the adjustment angle of mould is substantially between 0.2 ° ~ 5 °, so and the relative side plate of two of which of its cover half can realize and be pivoted out realizing different draw tapers, its angle changing is quick and convenient, greatly save the cycle of adjustment draft angle complete detection, comprehensively and accurately data can be obtained.
The further setting of the present invention is that the outside of the cover half, which has, forms a chamber that can be inserted for locating piece between an external mold, the side wall of the outer membrane and cover half, the locating piece has the inclined-plane to be adapted after angle upset with side plate.
By using above-mentioned technical proposal, it can realize after the certain draft angle of side plate upset by inserting the inclination number of degrees identical fixed plate with one side gradient and side plate in chamber, it can play and side plate is fixed after rotation respective angles, it is to avoid the sideslip at angle of inclination.
The further setting of the present invention is that the dynamic model forms the die cavity of even number rectangular-shape with cover half.
By using above-mentioned technical proposal, by being provided with multiple die cavities among a mould, multi-group data can once be gathered by serving.
The further setting of the present invention is, a pressure sensor is provided with the top of the thimble.
By using above-mentioned technical proposal, by being also equipped with sensor at the top of thimble, it be able to can obtain most intuitively detecting for the bottom knockout press at thimble rod.
The further setting of the present invention is that each side wall in the cover half is provided with pressure sensor.
By using above-mentioned technical proposal, pressure sensor is provided with each side-walls, many places measurement can be served, be that measurement data is more comprehensive.
The further setting of the present invention is that the raw material in the injection device is at least one of polyethylene, polystyrene, makrolon, ABS, PS, PA.
By using above-mentioned technical proposal, the plurality of raw materials of plastic injection can be made to obtain test data, test data can also carry out across comparison, and data are comprehensively effective.
The second goal of the invention of the present invention is to provide a kind of method for testing plastics knockout press, comprises the following steps,（a）Two blocks of side plates of cover half are pivoted to the draft angle to form α laterally with same angle；（b）Corresponding locating piece is inserted side plate positioned in chamber；（c）Corresponding raw material are selected to add among injection device, raw material are homogenized and melted by injection device；（d）Raw material are injected into injection molding among the die cavity between fixed half and moving half, through cooling and shaping, opening mold；（e）Jacking system is ejected, and the pressure sensor on thimble obtains pressure value Ft1, and in side, the pressure sensor of wall obtains pressure value Fb；（f）Obtained pressure value Ft1 and Fb are passed through into processing unit processes, final initial knockout press is obtained.
The further setting of the present invention is that the step f includes：（1）The Fb values that side wall is collected substitute into Ft2=Fb in formula（μcosα-sinα）Conversion, obtains Ft2；（2）Ft1 values and Ft2 values in each die cavity is acquired, Ft is obtained1a、Ft1b、Ft1c、Ft1d、Ft1e... Ft1nAnd Ft2a、Ft2b、Ft2c、Ft2d、Ft2e.... Ft2n, above-mentioned data are averaged Ftavg1=（Ft1a+Ft1b+Ft1c+Ft1d+Ft1e+...
Ft1n）/n；Ftavg2=（Ft2a+Ft2b+Ft2c+Ft2d+Ft2e+...
Ft2n）/n.
The further setting of the present invention is, among step 2, before averaging, by the Ft collected1a、Ft1b、Ft1c、Ft1d、Ft1e... Ft1nAnd Ft2a、Ft2b、Ft2c、Ft2d、Ft2e.... Ft2nMaximum and minimum value are removed in two groups of data.
Brief description of the drawings
Fig. 1 is the outside overall schematic of plastics knockout press testing mould；
Fig. 2 is the schematic diagram of the dynamic model, cover half and liftout attachment of plastics knockout press testing mould；
Fig. 3 is the schematic diagram of the cover half of embodiment 1；
Fig. 4 is the schematic diagram of the cover half of embodiment 2；
Fig. 5 is the sectional view of cover half（Wherein locating piece is not put into chamber）；
Fig. 6 is the sectional view of cover half（Wherein locating piece is put into chamber）；
Fig. 7 is the method flow diagram of plastics knockout press testing mould.
In figure, 1, dynamic model；11st, main flow is to hole；2nd, cover half；21st, die cavity；211st, side plate；22nd, outer membrane；221st, cover plate；222nd, chamber；23rd, locating piece；3rd, liftout attachment；31st, liftout plate；32nd, thimble；4th, pressure sensor；5th, injection machine.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment 1：
It refer to accompanying drawing 1, the schematic diagram of plastics knockout press testing mould, successively including injection machine 5, cover half 2, dynamic model 1 and liftout attachment 3, wherein cover half 2 is shaped as rectangular-shape, includes the die cavity 21 of 2 rectangular-shapes；A sprue hole is provided with dynamic model 1, sprue hole is corresponded in two die cavities 21 of flowing respectively by two runners, and injection machine 5 is connected with sprue hole, and the raw material for heating melting is injected among the die cavity 21 formed between cover half 2 and dynamic model 1.Wherein raw material can be that raw material is at least one of polyethylene, polystyrene, makrolon, ABS, PS, PA, performance or a variety of combinations of course for the different knockout presses after test different material addition.
It refer to accompanying drawing 2,3, pressure sensor 4 is provided with 21 4 side walls of die cavity of cover half 2 and the center of bottom, the top of the position of pressure sensor 4 and the side wall of cover half 2 and bottom wall are in the same horizontal line, with the Data Detection deviation for the appearance among checking of pressure sensor 4 for preventing protrusion, the pressure end of pressure sensor 4 and one is coupled, and pressure sensor 4 is handled by a processing unit, the initial knockout press of final output.
It refer to accompanying drawing 5, 6, the outside of cover half 2 is provided with an outer membrane 22, the length of outer membrane 22 is more than the length of cover half 2, that is a chamber 222 is formed between the opposed side wall of two of which and outer membrane 22 of each die cavity 21, and the chamber 222 relative to the bottom wall of cover half 2 be provided with an openable cover plate 221, and the opposed side wall of two of which of cover half 2 is on bottom wall between pivotable 0.2 ° ~ 5 °, after two blocks of side plates 211 pivot identical angle, cover plate 221 can just be opened, locating piece 23 is inserted, wherein locating piece 23 has the inclined-plane to be adapted after angle upset with side plate 211, side plate 211 is fixed with realizing.
Fig. 7 is the method flow diagram of the test of the plastics knockout press testing mould of the present invention, please with reference to accompanying drawing, two blocks of side plates 211 of cover half 2 are pivoted to the draft angle to form α laterally with same angle first, then the cover plate 221 of bottom is opened, locating piece 23 of the selection with corresponding α inclined-planes, locating piece 23 is inserted side plate 211 positioned in chamber 222, it is fixed；Corresponding raw material is selected, starts injection device and raw material is homogenized and melted, injection molding among the die cavity 21 between raw material injection cover half 2 and dynamic model 1, through cooling and shaping, opening mold；Jacking system is ejected, and jacking system ejection, the pressure sensor 4 on thimble 32 and on bottom wall obtains pressure value Ft1, and in side, the pressure sensor 4 of wall obtains pressure value Fb；Obtained data are acquired, handled by processing unit, are the step of processing：The Fb values that side wall is collected substitute into Ft2=Fb in formula（μcosα-sinα）Conversion, obtains Ft2；Ft1 values and Ft2 values in each die cavity 21 is acquired, Ft1a, Ft1b, Ft1c, Ft1d, Ft1e... Ft1n and Ft2a, Ft2b, Ft2c, Ft2d, Ft2e.... Ft2n is obtained, above-mentioned data is averaged
Ftavg1=（Ft1a+Ft1b+Ft1c+Ft1d+Ft1e+...
Ft1n）/n ；
Ftavg2=（Ft2a+Ft2b+Ft2c+Ft2d+Ft2e+...
Ft2n）/ n, obtains final initial knockout press, and shown by pressure end.
Thus, the simulation of real simple injection mold, can be in the inside injection molding of cover half 2, pressurize is cooled down, the pressure for being stripped ejection stage mould inside carries out examinations, and by processing unit processes after, feed back at pressure end, it is small with cost, detect the reliable effect of data, and the relative side plate 211 of the two of which of its cover half 2, which can be realized, to be pivoted out realizing different draw tapers, its angle changing is quick and convenient, greatly save the cycle of adjustment draft angle complete detection, but also can be analyzed according to combination of different materials, comprehensively and accurately data can be obtained.
Embodiment 2：
Refer to accompanying drawing 4, on the basis of embodiment 1, it is with the difference of embodiment 1, a cube-shaped die cavity 21 is provided with cover half 2, after can playing injection molding again, four groups of data can be collected to be compared, the group number of collection is more, its error rate is just smaller, liftout attachment 3 includes having four thimbles 32 in thimble 32 and liftout plate 31, and each die cavity 21, and pressure sensor 4 is also equipped with the top of thimble 32, so as to obtain the data of the initial knockout press on thimble 32, error can be further reduced.
Embodiment 3：
On the basis of embodiment 1, among the processing procedure of processing unit, before averaging, maximum and minimum value will be removed in two groups of data of Ft1a, Ft1b, Ft1c, Ft1d, Ft1e... Ft1n collected and Ft2a, Ft2b, Ft2c, Ft2d, Ft2e.... Ft2n, so as to reduce error amount.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make the modification without creative contribution to the present embodiment as needed after this specification is read, but as long as all being protected in scope of the presently claimed invention by Patent Law.
Claims (9)
1. a kind of plastics knockout press testing mould, including injection device, dynamic model, cover half and liftout attachment, it is characterized in that, the liftout attachment includes liftout plate and thimble, the thimble groove worn for thimble is provided with the bottom plate of the cover half, two relative side plates (211) of the cover half mutually pivot enable with bottom plate and outwards overturn 0.2 ° ~ 5 ° to form its corresponding draft angle, and fixed by corresponding fixing device, bottom plate and side wall on the inside of the cover half are provided with pressure sensor, also include a pressure end, the pressure end is coupled with the pressure sensor, and the detection signal of pressure sensor is passed through into a processing unit processes, the initial knockout press of final output.
2. a kind of plastics knockout press testing mould according to claim 1, it is characterized in that, the outside of the cover half has an external mold, a chamber (222) that can be inserted for locating piece (23) is formed between the side wall of the outer membrane and cover half, the locating piece (23) has the inclined-plane to be adapted after angle upset with side plate (211).
3. a kind of plastics knockout press testing mould according to claim 2, it is characterised in that the die cavity of the dynamic model and cover half formation even number rectangular-shape.
4. a kind of plastics knockout press testing mould according to claim 3 a, it is characterised in that pressure sensor is provided with the top of the thimble.
5. a kind of plastics knockout press testing mould according to claim 4, it is characterised in that each side wall in the cover half is provided with pressure sensor.
6. a kind of plastics knockout press testing mould according to claim 5, it is characterised in that the raw material in the injection device is at least one of polyethylene, polystyrene, makrolon, ABS, PS, PA.
7. a kind of method for testing plastics knockout press, comprises the following steps：
A, two pieces of side plates (211) of cover half is pivoted laterally with same angle the draft angle to form α；
B, corresponding locating piece (23) is inserted side plate (211) positioned in chamber (222)；
C, selects corresponding raw material to add among injection device, and raw material are homogenized and melted by injection device；
Raw material are injected injection molding among the die cavity between fixed half and moving half, through cooling and shaping, opening mold by d；
E, jacking system ejection, the pressure sensor on thimble and on bottom wall obtains pressure value Ft1, and in side, the pressure sensor of wall obtains pressure value Fb；
F, passes through processing unit processes by obtained pressure value Ft1 and Fb, obtains final initial knockout press.
8. a kind of method for testing plastics knockout press according to claim 7, it is characterised in that the step f includes：
1st, the Fb values for collecting side wall substitute into Ft2=Fb in formula（μcosα-sinα）Conversion, obtains Ft2；
2nd, the Ft1 values and Ft2 values in each die cavity are acquired, obtain Ft1a, Ft1b, Ft1c, Ft1d, Ft1e... Ft1n and Ft2a, Ft2b, Ft2c, Ft2d, Ft2e.... Ft2n, above-mentioned data are averaged
Ftavg1=（Ft1a+Ft1b+Ft1c+Ft1d+Ft1e+... Ft1n）/n ；
Ftavg2=（Ft2a+Ft2b+Ft2c+Ft2d+Ft2e+... Ft2n）/n .
9. a kind of method for testing plastics knockout press according to claim 8, it is characterized in that, among step 2, before averaging, maximum and minimum value will be removed in two groups of data of Ft1a, Ft1b, Ft1c, Ft1d, Ft1e... Ft1n collected and Ft2a, Ft2b, Ft2c, Ft2d, Ft2e.... Ft2n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610267930.2A CN107246927B (en) | 2016-04-26 | 2016-04-26 | plastic demolding force testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610267930.2A CN107246927B (en) | 2016-04-26 | 2016-04-26 | plastic demolding force testing method |
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| CN107246927A true CN107246927A (en) | 2017-10-13 |
| CN107246927B CN107246927B (en) | 2020-01-31 |
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| CN201610267930.2A Active CN107246927B (en) | 2016-04-26 | 2016-04-26 | plastic demolding force testing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111016092A (en) * | 2019-11-21 | 2020-04-17 | 广州华新科智造技术有限公司 | Demolding force testing device and method |
| CN111380637A (en) * | 2018-12-29 | 2020-07-07 | 无锡华润华晶微电子有限公司 | Demolding force testing device and testing method thereof |
| CN113320103A (en) * | 2021-08-04 | 2021-08-31 | 南通海蓝德机械有限公司 | Automatic mould release device for injection molding machine of compound die line polishes |
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| CN103895193A (en) * | 2012-12-25 | 2014-07-02 | 住友重机械工业株式会社 | Injection molding machine with an ejector unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111380637A (en) * | 2018-12-29 | 2020-07-07 | 无锡华润华晶微电子有限公司 | Demolding force testing device and testing method thereof |
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| CN113320103A (en) * | 2021-08-04 | 2021-08-31 | 南通海蓝德机械有限公司 | Automatic mould release device for injection molding machine of compound die line polishes |
| CN113320103B (en) * | 2021-08-04 | 2021-10-01 | 南通海蓝德机械有限公司 | Automatic mould release device for injection molding machine of compound die line polishes |
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