CN200993620Y - Mould for preparing samples - Google Patents
Mould for preparing samples Download PDFInfo
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- CN200993620Y CN200993620Y CN 200620167469 CN200620167469U CN200993620Y CN 200993620 Y CN200993620 Y CN 200993620Y CN 200620167469 CN200620167469 CN 200620167469 CN 200620167469 U CN200620167469 U CN 200620167469U CN 200993620 Y CN200993620 Y CN 200993620Y
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- sample
- die cavity
- mould
- cast gate
- runner
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Abstract
A die to prepare samples comprises a die cavity board, a die cavity on the die cavity board, a pouring head connected with the die cavity and a distribution channel connected with the pouring head. Wherein, the pouring head is arranged on an end face along a length of the die cavity. It is acceptable that the pouring head shares the same width with the distribution channel connected with the pouring head. The pouring head of the die is positioned on an end face along a length of the die cavity. Sample ends are usually adopted as a clamp, thus having no impact on tests. Therefore, pouring head traces after injection will not impact sample quality, thus maximizing adverse impact on plastic performance during processing and manufacturing an ensuring authentic comparability of the tested performance data.
Description
Technical field
The utility model relates to mould, particularly relates to a kind of mould that is used to prepare sample.
Background technology
Because the single-point performance data does not have comparability, when selecting material, bring very big puzzlement for the designer, particularly along with the raising day by day that product quality is required, the single-point performance data of plastics can not satisfy design requirement.Based on this, multiple spot data test standard has appearred in the world, and the multiple spot data are meant the series of values of the performance of plastics with the variation of temperature and/or time, and promptly available curve characterizes a certain performance of plastics.In order to record the multiple spot data with comparability, international standard has been stipulated the type of sample, and the sample that generally adopts mainly is divided three classes at present.Wherein a class is a multifunction sample, comprise A type 170mm * 10mm * 4mm and Type B 150mm * 10mm * 4mm, the length dimension of this class sample is longer, after carrying out tension test, cut out the end at two ends by machine work, do impact property test or bending property test etc. by remaining center section again, therefore be referred to as multifunction sample; Second class is rectangular sample, is of a size of 80mm * 10mm * 4mm; The 3rd class is square sample, is of a size of 60mm * 60mm * 2mm.
In order to obtain the comparable data of real multiple spot, the whole test surfaces that needs strict control multi-point sampler sample all should smooth smooth no vestige, and the performance complete and homogeneous of material.But because multiple spot performance test sample is for single-point performance test sample, the length of sample, burnishing surface all significantly increases, but the thickness of sample does not have to change substantially, length significantly increases with the thickness ratio, because same material is in the specific injection temperature, under the injection pressure, be subject to the flow characteristics of material, even under the situation of pressurize for a long time, also can not be full of big and shallow die cavity at all and make the large-area qualified multiple spot sample of thin type, therefore, the existing mould that is used to prepare the single-point sample can't be used to inject qualified multiple spot sample by changing cavity dimension simply.
At present, though the Standard Module of some preparation multiple spot performance samples is provided in the world, for example,, recommended the standard injection mould of two chambeies, Z-shaped or T shape runner for the injection multifunction sample; For the strip sample, recommend to adopt the standard injection mould of four chambeies, double T shape runner.Although above-mentioned corresponding standard injection molding has been recommended by international organization, but in actual the use, these Standard Modules can not inject qualified multiple spot sample, can't obtain accurately to react the multiple spot data of plastics actual performance, lost the real comparability of multiple spot performance data, still do not have at present a kind of effective mould that can inject the multiple spot sample of actual response material property, existing multiple spot sample injection mould mainly exists the design problem of following several respects to await improving:
One, the gate location of existing multiple spot sample injection mould is located at the die cavity side, the sample that injection is come out can stay the injection vestige of cast gate in the side, even remove the cast gate on surface by machine work, but near the following plastics performance cast gate in surface still obviously is different from the performance of whole sample, the sample performance heterogeneity can have a strong impact on the tensile property of material at the injection flaw of sample side.
Two, the ratio of the width of the cast gate of existing multiple spot sample injection mould and die cavity is improper, the width of cast gate is generally less than the die cavity width at present, the sample that feasible injection is come out with cast gate over against the length direction of plastic flow direction on, can't realize shrinkage-compensating, sample thickness inequality, performance are obviously uneven.The cast gate length dimension of existing mold neither be very reasonable, the injected material materials flow is longer relatively through flow process herein, greatly subdued the flow velocity of plastics, influence plastics and under specific pressure, be full of die cavity fast, be easy to the phenomenon that occurs being not fully filled, can't obtain complete sample, more have no way of referring to the qualified problem of sample.
Three, the demoulding angle of the die cavity of existing multiple spot sample injection mould neither be very reasonable, usually can not successfully make the sample demoulding, by ejecting structure sample be ejected forcibly, will inevitably cause the flatness of sample influenced, influence the test result of sample performance, it is underproof that sample remains.
Four, the ejecting structure of the existing multiple spot sample injection mould multiple spot that still is confined to post rod type ejects, this ejecting structure is for large-area thin type multiple spot sample, push rod and sample position contacting have and eject vestige on the one hand, influence the flatness of specimen surface, influence stretches and impulse test, under the ill situation of the demoulding, and also can be with the sample bending, have a strong impact on the bending property of sample, sample becomes defect ware.
Five, the demoulding angle of the runner of existing multiple spot sample injection mould normally designs a kind of demoulding angle at a kind of test material, and the versatility of mould is poor, can not be used to prepare the multiple spot sample of multiple material.
The utility model content
Technical problem to be solved in the utility model provides a kind of mould that is used to prepare sample, can inject material property homogeneous, reaction plastics actual performance, obtain under identical test condition, really to have the qualified sample of the performance data of comparability, can guarantee the high qualification rate of sample.
Another technical matters to be solved in the utility model provides a kind of mould that is used to prepare sample, can be used in the test sample of the multiple common used material of preparation, improves the universal performance of mould, reduces testing cost.
The technical solution of the utility model is: a kind of mould that is used to prepare sample comprises cavity plate, cast gate that be provided with die cavity on cavity plate, is connected with die cavity and the runner that is connected with cast gate; Described cast gate is located on the end face at die cavity length direction place.Can avoid fully like this staying any injection vestige in the upper and lower surface and the left and right side of sample, it is minimum that the process of injection molding of sample is reduced to the influence of sample performance, the sample mass height.
Preferably, the width of described cast gate equates with the width of die cavity end face.The height of described cast gate is not less than 2/3 of die cavity height.The length of described cast gate is 2～3mm.
Preferably, the demoulding oblique angle of described die cavity is less than 1 °.
Preferably, comprise that the integral body that matches with die cavity ejects core, described core is located on the liftout plate, ejects core by a fore-set contact liftout plate.
Further improve, the demoulding oblique angle of described runner is 10 °～30 °.This bigger demoulding oblique angle can be common to the test specimens of the multiple thermoplastics commonly used of preparation, improves the versatility of mould.
Preferably, include a sprue bush, this sprue bush is provided with main cast gate and the sprue that is connected with main cast gate, and this sprue is connected with runner on the cavity plate, and the diameter of this sprue is not less than 4mm, and the width of runner and highly be not less than 5mm.
Preferably, described die cavity is 2, and described runner is Z-shaped, T shape or in-line.
Preferably, described die cavity is 4, and described runner is double T shape or cruciform.
According to such scheme, effect of the present utility model is significant:
One, the cast gate of mould of the present utility model is located at die cavity along on the end face of specimen length direction, because the end of sample only is the usefulness as clamping usually, for not influence of testing experiment, therefore, can not influence the quality of sample, make the performance of plastics be subject to processing, the adverse effect in the process such as manufacturing drops to minimumly, guarantees that the measured performance data of sample is really to have comparability.
Two, the width of the cast gate in the utility model and die cavity end face are wide, can guarantee on the one hand the big flow of cast gate, big flow velocity and be convenient to be full of die cavity, can avoid simultaneously the unbalanced problem of the contraction that cast gate brought, guarantee that sample thickness is even less than the die cavity width.And the Design of length of cast gate is in the scope of 2～3mm, can guarantee short flow process and realizes that big flow velocity is full of helping, and can guarantee the intensity of cast gate again, is not easy to be dashed by the large impact power of material decrease, and what guarantee injection normally carries out sample qualification rate height.
Three, the demoulding angle of die cavity is about 1 ° in the utility model, can guarantee the demoulding smoothly and is unlikely to make sample to be ejected structure bending or influence the flatness of sample, sample qualification rate height by force.
Four, mould of the present utility model has adopted the whole structure that ejects, and ejects core with cavity dimension is in full accord, and to be ejected face stressed even whole to make sample like this, is easy to eject, and can guarantees that sample is ejected the flatness of face, and sample mass is high.
Five, the demoulding angle of runner of the present utility model can be common to the test specimens of the multiple thermoplastics commonly used of preparation in 10 °～30 ° scope, and the versatility of mould is splendid.
Description of drawings
Fig. 1 is the three-dimensional exploded view of the utility model most preferred embodiment.
Fig. 2 is the rear view of the utility model most preferred embodiment assembled state.
Fig. 3 is the E-E cut-open view of Fig. 2.
Fig. 4 is the partial sectional view of most preferred embodiment among Fig. 2.
Fig. 5 faces enlarged drawing one for the cast gate of the utility model most preferred embodiment.
Fig. 6 is the side-looking enlarged drawing two at the cast gate position of the utility model most preferred embodiment.
Fig. 7 is the structural representation of T shape for the utility model runner.
Fig. 8 is the structural representation of in-line for the utility model runner.
Fig. 9 is the structural representation of double T shape for the utility model runner.
Figure 10 is criss-cross structural representation for the utility model runner.
Embodiment
Shown in Fig. 1～4, the utility model provides a kind of mould that is used to prepare sample, comprises sprue bush 1, quiet template 2, cavity plate 3, core 4, liftout plate 5, moving platen 6 and fore-set 7 in regular turn; Wherein sprue bush 1 is provided with main cast gate 11 and coupled logical sprue 12, and the diameter dimension of sprue 12 is not less than 4mm, preferably adopts 5mm; Cavity plate 3 is provided with two parallel being used to and injects A type multifunction sample (170mm * 10mm * die cavity 31 4mm), the cast gate that is connected with die cavity 31 32 and the Z-shaped runner 33 that is connected with cast gate 32, in the preferred embodiment, the width of the runner 33 on the cavity plate 3 and highly be not less than 5mm for example is 6mm.Sprue bush 1 passes the centre of the Z-shaped runner 33 of quiet template 2 on the cavity plate 3, Z-shaped runner 33 can guarantee good mold clamping force, certainly, runner also can for T shape or in-line (as Fig. 7, shown in 8), first aspect improvements of the present utility model are: described cast gate 32 is located on the end face 34 at die cavity 31 length direction places, can avoid fully staying any injection vestige in the upper and lower surface and the left and right side of sample, improve sample mass, acquisition has the multiple spot performance data of real comparability, the utility model only by cast gate 32 being located on die cavity 31 end face along its length, just can significantly improve the performance homogeneity of sample.
Second aspect in the utility model, can also be improved the performance of sample by the gate size on the change cavity plate 3.Shown in Fig. 5,6, the width W 32 of described cast gate 32 equates with the width W 31 of die cavity end face 34, can guarantee the big flow of cast gate 32, big flow velocity, be convenient to make material to be full of die cavity 31, can avoid simultaneously the unbalanced problem of the contraction that cast gate brought, guarantee that sample thickness is even less than die cavity 31 width; The height H of cast gate 32 is advisable to be not less than 2/3 of die cavity height, has guaranteed big flow, big flow velocity from another point of view, has been full of fully; The Design of length of cast gate 32 is in the scope of 2～3mm, has further strengthened short flow process, big flow velocity and has helped the project organization that is full of, guarantees the high qualification rate of sample, and can guarantee the intensity of cast gate, optimizes the life-span that prolongs mould.
The third aspect, the demoulding angle of die cavity 31 is about 1 °, preferably is less than 1 °, can guarantee the demoulding smoothly, improves the qualification rate of sample.
Fourth aspect, mould structure of the present utility model has improved whole liftout attachment, comprise that the integral body that matches with die cavity 31 ejects core 4, described core 4 is located on the liftout plate 5, hold and prop up liftout plate 5 and a fore-set 7 passes moving platen 6, eject core 4 forward by liftout plate 5 again and sample is ejected, the whole ejecting structure that the utility model adopts, the core 4 that ejects usefulness is in full accord with die cavity 31 sizes, to be ejected face stressed evenly whole to make sample, be easy to eject, and the lower surface that sample is ejected do not have any vestige that ejects, the flatness of specimen surface is good, and sample mass is high.
Further improvement of the present utility model, the demoulding angle A of the runner 32 on the cavity plate 3 is in 10 °～30 ° scope, can be common to the multiple tygon (PE) commonly used of preparation, the test specimens of polypropylene thermoplasticss such as (PP), the versatility of mould is splendid.
Illustrate that the die cavity 31 among this embodiment is used to inject multi-functional A type sample, can certainly be used for preparing Type B sample and rectangular sample, no longer describe in detail, only need to change cavity dimension and get final product according to specimen size.
Shown in Fig. 9,10, structure, principle and the effect of this embodiment and embodiment 1 are basic identical, no longer repeat.Difference is: the die cavity 31 on the cavity plate 3 is 4, and described runner is double T shape or cruciform, is exclusively used in the square sample of moulding.Wherein for the square sample because the length and width of die cavity are measure-alike and big (60mm), gate size with die cavity with before wide, can go out cone-shaped gate by the runner gradual change in advance, will help moulding.
In the utility model, cast gate is located at the feature (representing with A) of end face, the feature (representing with B) of gate size, the feature (representing with C) of die cavity demoulding angle, this central combination in any that integral body ejects (representing with D), can both improve the moulding qualification rate of mould, never ipsilateral improves the quality of sample; And the bigger demoulding oblique angle (representing with E) of runner will help improving the versatility of mould.The combination in any of above-mentioned five features is embodiment 3～15 of the claimed mould of the utility model, and principle and effect no longer repeat.Existing tabulation is as follows, has certain feature, with "+" expression, does not possess certain feature, with "-" expression, will be not described in detail each mould.Illustrate that embodiment 1,2 has comprised whole feature A, B, C, D, E, no longer repeat to list in this table.
| A | B | C | | E | |
| Embodiment | |||||
| 3 | + | + | - | - | - |
| |
+ | - | + | - | - |
| |
+ | - | - | + | - |
| |
+ | - | - | - | + |
| |
+ | + | + | - | - |
| Embodiment 8 | + | + | - | + | - |
| Embodiment 9 | + | + | - | - | + |
| Embodiment 10 | + | - | + | + | - |
| Embodiment 11 | + | - | + | - | + |
| Embodiment 12 | + | - | - | + | + |
| Embodiment 13 | + | + | + | + | - |
| Embodiment 14 | + | + | + | - | + |
| Embodiment 15 | + | - | + | + | + |
Comprehensive above explanation; relevant cast gate is provided with in the feature of feature, the die cavity demoulding angle of feature, the gate size of position, the feature that integral body ejects any one in this in the mould of the present utility model; can both improve the qualification rate of existing multiple spot sample mould sample injection; improve sample mass; therefore; as long as adopted the combination in any of above-mentioned any four features, just all should belong to protection domain of the present utility model.And mould of the present utility model not only is confined to prepare the above-mentioned multiple spot sample of enumerating, and the multiple spot sample of any other type also can adopt mold injects of the present utility model to go out high-quality sample.And the utility model can be used to prepare the single-point sample of size on a small scale equally, can improve performance homogeneous, the stability of single-point sample equally, improves the comparability of one point data.
Claims (10)
1, a kind of mould that is used to prepare sample comprises cavity plate, cast gate that be provided with die cavity on cavity plate, is connected with die cavity and the runner that is connected with cast gate; It is characterized in that: described cast gate is located at along on the end face at die cavity length direction place.
2, the mould that is used to prepare sample as claimed in claim 1 is characterized in that: the width of described cast gate equates with the width of die cavity end face.
3, the mould that is used to prepare sample as claimed in claim 1, it is characterized in that: the height of described cast gate is not less than 2/3 of die cavity height.
4, the mould that is used to prepare sample as claimed in claim 1 is characterized in that: the length of described cast gate is 2～3mm.
5, the mould that is used to prepare sample as claimed in claim 1 is characterized in that: the demoulding oblique angle of described die cavity is less than 1 °.
6, the mould that is used to prepare sample as claimed in claim 1 is characterized in that: comprise that the integral body that matches with die cavity ejects core, described core is located on the liftout plate, by a fore-set contact liftout plate.
7, the mould that is used to prepare sample as claimed in claim 1 is characterized in that: the demoulding oblique angle of described runner is 10 °～30 °.
8, the mould that is used to prepare sample as claimed in claim 1, it is characterized in that: include a sprue bush, the sprue that this sprue bush is provided with main cast gate and is connected with main cast gate, this sprue is connected with runner on the cavity plate, the diameter of this sprue is not less than 4mm, and the width of runner and highly be not less than 5mm.
9, as any one described mould that is used to prepare sample in the claim 1～8, it is characterized in that: described die cavity is 2, and described runner is Z-shaped, T shape or in-line.
10, as any one described mould that is used to prepare sample in the claim 1～8, it is characterized in that: described die cavity is 4, and described runner is double T shape or cruciform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620167469 CN200993620Y (en) | 2006-12-14 | 2006-12-14 | Mould for preparing samples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620167469 CN200993620Y (en) | 2006-12-14 | 2006-12-14 | Mould for preparing samples |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200993620Y true CN200993620Y (en) | 2007-12-19 |
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ID=38946694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620167469 Expired - Fee Related CN200993620Y (en) | 2006-12-14 | 2006-12-14 | Mould for preparing samples |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200993620Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954737A (en) * | 2010-09-21 | 2011-01-26 | 重庆文理学院 | High polymer hot-press mold with changeable cavity and use method thereof |
| CN104458381A (en) * | 2014-12-17 | 2015-03-25 | 苏州禾昌聚合材料股份有限公司 | Sample-band mold for testing modified plastics |
| CN106442043A (en) * | 2016-08-28 | 2017-02-22 | 青岛海通车桥有限公司 | Sheet molding compound (SMC) sheet performance detection module for manufacture of automobile components, and use method of SMC sheet performance detection module |
-
2006
- 2006-12-14 CN CN 200620167469 patent/CN200993620Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954737A (en) * | 2010-09-21 | 2011-01-26 | 重庆文理学院 | High polymer hot-press mold with changeable cavity and use method thereof |
| CN101954737B (en) * | 2010-09-21 | 2015-08-19 | 重庆科技学院 | The polymer hot-pressing die of variable impression and using method |
| CN104458381A (en) * | 2014-12-17 | 2015-03-25 | 苏州禾昌聚合材料股份有限公司 | Sample-band mold for testing modified plastics |
| CN106442043A (en) * | 2016-08-28 | 2017-02-22 | 青岛海通车桥有限公司 | Sheet molding compound (SMC) sheet performance detection module for manufacture of automobile components, and use method of SMC sheet performance detection module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20100114 |