CN102416690A - Mold for evaluating appearance of plastic - Google Patents
Mold for evaluating appearance of plastic Download PDFInfo
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- CN102416690A CN102416690A CN2011104007203A CN201110400720A CN102416690A CN 102416690 A CN102416690 A CN 102416690A CN 2011104007203 A CN2011104007203 A CN 2011104007203A CN 201110400720 A CN201110400720 A CN 201110400720A CN 102416690 A CN102416690 A CN 102416690A
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- plastic cement
- ocular estimate
- dynamic model
- gate
- mold
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Abstract
The invention discloses a mold for evaluating appearance of plastic. The mold comprises a movable mold and a fixed mold, wherein the surface of a mold cavity formed by closing the movable mold and the fixed mold is a smooth interface subjected to polishing treatment by No.6000 diamond paste. The mold has the advantages that: 1, the mold cavity subjected to polishing treatment can be better applied to the evaluation of the surface smoothness and gloss of a product; 2, a plurality of sprues can evaluate defects which easily occur nearby the sprues simultaneously; and 3, a plurality of scales, blind holes and through hole circular rings can be used for increasing the gloss and sensitivity of a material, so that the surface gloss of the material is enhanced, and the contraction performance of the material is measured.
Description
Technical field
The present invention relates to a kind of mould design field, estimate especially for plastic material Injection moulded part appearance property.
Background technology
Injection mo(u)lding is a processing method the most frequently used in the plastic processing; Its injection moulding process does, is molten condition with solid-state plastic cement thawing at first, and melten gel is full of mold cavity through mold runner and cast gate under the effect of screw in injection molding machine force subsequently; Experience the high pressure that continues then; In die cavity, being pressed into more melten gel, in order to shrink the reduction in bulk that is brought in the compensative material cooling procedure, is to open mould to take out product at last.On the one hand, in injection moulding process, plastic cement has experienced complicated thermodynamics course, and it is varied to influence the material appearance factor; On the other hand; Along with the development of plastic cement industry, also complicated all the more various in the Injection moulded part design, require also increasingly high to the plastic cement product; Particularly open defect requires strictness all the more, and these all utilize suitable material to propose higher requirement to the modification application and development of plastic cement.The method that in the past solved the material appearance defective all is through the test portion in the customers' place repeatedly usually; In the test portion process, constantly pinpoint the problems and improve material again; This handling problem mode is consuming time longer; Waste material and manual work take customer resources and often do not have grace time to scrutinize the root place of problem; Another kind method is to use the apparent condition that in the laboratory, utilizes colour table mould simple in structure to observe material, but the colour table appearance that obtains often has bigger difference with the product that adopts the complicated die moulding.
Summary of the invention
The present invention discloses the plastic cement ocular estimate mould of a kind of convenience, practicality, is used for the evaluation of plastic material moulding appearance property.
A kind of plastic cement ocular estimate mould, the closed mold cavity surface that forms of dynamic model and cover half is through the polishing of the above diamond cream of 6000#; Offer mold temperature control medium flow passage at dynamic model and cover half apart from cavity surface a distance, and the heat transfer medium control mold surface temperature that utilizes external die heater to carry.
In injection moulding process, utilize heat transfer medium heating cavity surface to different temperature; But assessment material is to the sensitivity that high optical mode face duplicates, product glossiness, surperficial albefaction change with Shooting Technique, and then confirms the good required Shooting Technique scope of product of forming materials outward appearance estimated.
Form A and two die cavities of B after the active and inactive mold closure, offer five cast gates on each die cavity.On the mould dynamic model, offer the gating insert installation site, install on the cast gate mold insert wherein and have four kinds of different gate forms and size, the 5th cast gate directly is opened on the dynamic model position with preceding four cast gate apart from each others.Cast gate links to each other with sprue through runner, offers the many places flow control valve on the runner.This design can be assessed the defective that appears at around the cast gate,, spray line, cold burden spot dizzy like cast gate, sprays defective such as trace, the sensitiveness that changes with gate form, size and machined parameters; Open mould go forward any one and the 5th cast gate in four cast gates through the adjustment flow control valve; Can form the welding zone in mouldings corner, and then the obvious degree of assessment material welding indenture, weld mark color and product main body color distortion, weld mark both sides color distortion are with the sensitiveness of gate form, size, molding parameter variation.
Because violent turning point takes place at flow direction and albefaction occurs in plastic cement easily in mold filling process; Thereby each die cavity all has 90 ° of corner structures and 90 ° of flanging structures, and these 90 ° of corner structures and flanging structure all can be used for the evaluating material flow divert and produce the obvious degree of stress whitening.
The gradient thickness design is all adopted in A die cavity and Type B chamber, can be used for assessing the difference that causes the outer light face glossiness difference and the mist that turns white because of the thickness difference.
The A die cavity has decorative thread, and this design is that strip is protruding in the dynamic model side, is the strip pit in the cover half side, and protruding and pit is positioned at same position on the mould, is used for assessing melt and flows to the influence of product appearance in the mould upset.
The A die cavity has the rule design of three places; The rule design of one place is arranged on the vertical melt plastic cement flow direction of corner; The direction that is parallel to die cavity edges in the both sides, turning respectively has place rule design; When closing the 5th cast gate and opening in preceding four cast gates any cast gate; The rule of nearly gate end is used to estimate the shrinkage factor perpendicular on the melten gel flow direction, and corner's rule is used to estimate melten gel flow divert place shrinkage factor, and the rule of gate end far away can be used for estimating the shrinkage factor that is parallel on the melten gel flow direction.
It is 0.5mm that Type B chamber dynamic model side has four degree of depth, and radius is the blind hole of 5mm, and each blind hole has different transition section lengths.This design can be used for the albefaction of assessment material appearance and the gloss uneven defective sensitiveness to the blind hole transition section length.Type B chamber dynamic model side also has four kinds of screw columns, and can change the screw hole diameter through the ejector pin of changing different thicknesses.Can be used for assessment material shrink mark, glossiness difference sensitiveness with screw column design and change in size.Type B chamber dynamic model side has the different muscle position of separate thickness everywhere; The muscle position is opened in and is installed on the inserting of dynamic model side; And can insert through replacing and change muscle position thickness, this design can be used for the assessment material shrink mark or turn white to the sensitiveness of different muscle position thickness in the muscle position.Type B chamber dynamic model side has place's through hole toroidal design, and annulus connects the thin-walled muscle position design of a parallel die cavity edges.When cast gate is opened arbitrarily in current four cast gates, all can become plastic cement welding zone behind the annulus and form weld mark, fill the appearance of weld mark down at a high speed in order to assessment.
Evaluation mould according to the invention is applicable to the ocular estimate of following high luminescent material: high-light ABS, HIPS, PMMA, AS, PC, PPE etc. reach the high luminescent material by their one or more blending and modifying gained.
Plastic cement ocular estimate mould according to the invention, its advantage is following:
1. the mold cavity through polishing can be applied to assess product surface smoothness and glossiness preferably;
2. near many different cast gates defective of appearing at the cast gate of commute are simultaneously assessed;
3. many scales, blind hole and through hole annulus can be in order to increasing the material glossiness to its susceptibility, thereby strengthen the measurement of its lustrous surface and shrinkage.
Description of drawings
Fig. 1 is the schematic perspective view of said mould;
Schematic perspective view on Fig. 2 inserts for cast gate is opened in;
Fig. 3 is the structural representation of screw column;
Fig. 4 is the structural representation of die cavity gradient thickness design.
The main element explanation
| 1: | The A die cavity | 2: | The Type B chamber |
| 3: | Sprue | 4: | Runner |
| 5: | Cow glue powder | 6: | Sub marine gate |
| 7: | Thin side gate | 8: | Thick side gate |
| 9: | Rule | 10: | The muscle position |
| 11: | The through hole annulus | 12: | The thin-walled muscle |
| 13: | Decorative thread | 14: | Blind hole |
| 15: | Screw column | 16: | Flanging |
| 17: | Insert | 18: | Ejector pin |
| 19: | Outer side edges | 20: | Inner side edge |
The specific embodiment
Provide embodiment below more specifying the present invention, but the present invention is not limited to these embodiment, some nonessential change and adjustment that one of skill in the art makes according to technique scheme still belong to protection scope of the present invention.
Fig. 1 is the schematic perspective view of mould; Plastic cement ocular estimate mold cavity is made up of dynamic model and cover half closure at least; Two die cavitys of A and B are arranged in the close die, and cavity surface is through polishing, the interior mold temperature control medium flow passage that offers from die face a distance of dynamic model and cover half.
Said die cavity connects cast gate, runner 4, sprue 3 successively; The multiple structure that is used for the assessment material appearance property is arranged in the die cavity, comprise different gate forms, size and position, the gradual change wall thickness design; The design of different directions rule; Blind hole design with different transition section lengths, different screw column designs, the muscle position design of different-thickness.
Wherein, each die cavity all has 5 cast gates, and preceding 4 mutual close together of cast gate are positioned at die cavity the same area, and the 5th is opened on preceding 4 cast gates die cavity far away, and cast gate links to each other with sprue through runner, offers flow control valve on the runner.From left to right be respectively that thick side gate 5, thin side gate 6, sub marine gate 7,8, the 5 cast gates of horn gate adopt thick side gate design, preceding 4 cast gates are opened on the gating insert that is installed in the dynamic model, and the 5th cast gate directly is opened on the dynamic model.
A and B two die cavity cross sections all have gradient thickness design to be designed with flanging, thickness by the 3mm gradual change to 2.5mm; The A die cavity has the decorative thread design, and this is designed to the strip groove, is that strip is protruding in the dynamic model side, is the strip pit in the cover half side, and protruding and pit is positioned at same position on the mould; The A die cavity has 3 rule designs, rule direction and position; Type B chamber dynamic model side has 4 places to have the blind hole design of different transition section lengths, and blind hole depth h is 0.5mm, diameter 10mm, and from left to right transition section length L is respectively 30Xh, 10Xh, 3Xh, 0Xh.
As shown in Figure 3, Type B chamber dynamic model side has the design of 4 places screw columns, and from left to right the screw column design is respectively that root has no processings, root to add glue, root subtracts glue (being commonly called as volcanic crater design), screw column reinforcement and root and subtracts glue; And can change the screw hole diameter through the ejector pin of changing different thicknesses.
Type B chamber dynamic model side has the different muscle position design of the separate wall thickness in 4 places, and the muscle position is through 4 realizations of independently inserting.Muscle position thickness is respectively 48% product body thickness, 60% product body thickness, 72% product body thickness, 80% product body thickness from last to little; Type B chamber dynamic model side has place's through hole toroidal design, connects a thin-walled strip muscle position thereafter.Annulus thickness is 2.5mm, and muscle position thickness is 1mm, annulus and the high 10mm in muscle position.
It is as shown in Figure 2 to insert, and on said cast gate was opened in and inserts, inserting was installed in the moving die insert installation position, thereby and the plastic cement that is received from cast gate ejection its performance is assessed.
Fig. 4 is the structural representation of die cavity gradient thickness design; The thickness of its outer side edges 19 is less than the thickness of inner side edge 20, and to 2.5mm, its purposes is thickness by the 3mm gradual change; Polymer can flow in die cavity easily, is full of whole die cavity easily and is beneficial to estimate its correlated performance.
Claims (15)
1. a plastic cement ocular estimate mould comprises dynamic model and cover half, it is characterized in that, cavity surface moving, the closed formation of cover half is through the smooth interface after the polishing of the above diamond cream of 6000#.
2. plastic cement ocular estimate mould according to claim 1 is characterized in that, after moving, cover half is closed (2) two die cavities of A die cavity (1) and Type B chamber is arranged.
3. according to claim 1 or 2 said plastic cement ocular estimate moulds, it is characterized in that moving, cover half all offers mold temperature control medium flow passage, and control the mould temperature through the heat transfer medium that external die heater is carried.
4. according to the said plastic cement ocular estimate of claim 2 mould; It is characterized in that; Two die cavities of A and B have a plurality of multi-form cast gates, and its gate form comprises horn gate (5), sub marine gate (6), thin side gate (7), thick side gate (8).
5. according to the said plastic cement ocular estimate of claim 4 mould, it is characterized in that on said cast gate was opened in and inserts, inserting was installed in the moving die insert installation position, also be provided with the 5th cast gate on each die cavity and be opened on the moving platen.
6. according to claim 1,2,4 or 5 said plastic cement ocular estimate moulds; It is characterized in that; Each cast gate is connected with sprue (3) through runner (4), and runner (4) is provided with flow control valve and controls the flow velocity of melt plastic cement through each cast gate through the switching of controlling each cast gate.
7. plastic cement ocular estimate mould according to claim 2 is characterized in that, A and B two die cavities all are provided with the 90 ° of turning designs in a place.
8. plastic cement ocular estimate mould according to claim 2 is characterized in that, A and B two die cavities all have 90 ° of flanging designs.
9. plastic cement ocular estimate mould according to claim 2 is characterized in that, A and B two die cavities are all had a gradient thickness design, thickness by the even gradual change of 3mm to 2.5mm.
10. plastic cement ocular estimate mould according to claim 2; It is characterized in that the flanging place, side of A die cavity is provided with a decorative thread (13), this decorative thread (13) is that strip is protruding in the dynamic model side; In the cover half side is the strip pit, and protruding and pit is positioned at same position on the mould.
11. according to claim 2 or 7 described plastic cement ocular estimate moulds; It is characterized in that; A die cavity (1) has 3 100mm of place rules (9); Its position is respectively, and place rule design is arranged on the vertical melt plastic cement flow direction of corner, and the direction that is parallel to die cavity edges in the both sides, turning respectively has place rule design.
12. plastic cement ocular estimate mould according to claim 2; It is characterized in that it is 0.5mm that Type B chamber dynamic model side is provided with four degree of depth h, radius is the blind hole (14) of 5mm; The transition section length of each blind hole (14) has nothing in common with each other, and transition section length L is respectively 30Xh, 10Xh, 3Xh, 0Xh.
13. plastic cement ocular estimate mould according to claim 2; It is characterized in that; Type B chamber dynamic model side has four kinds of screw columns (15); Said four kinds of screw columns (15) are respectively that root has no processing, root to add glue, root subtracts glue, screw column reinforcement and root and subtracts glue, and screw hole is realized through ejector pin is set in the dynamic model side, can change the screw hole diameter through the ejector pin of changing different thicknesses.
14. plastic cement ocular estimate mould according to claim 2; It is characterized in that; Type B chamber dynamic model side has muscle positions separate and that thickness is different everywhere, and realize through four replaceable mold inserts are installed in the dynamic model side muscle position, can change muscle position thickness through changing mold insert.
15. plastic cement ocular estimate mould according to claim 2, Type B chamber dynamic model side have place's through hole annulus, annulus one termination is parallel to the thin-walled muscle position of die cavity edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400720.3A CN102416690B (en) | 2011-12-06 | 2011-12-06 | Mold for evaluating appearance of plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400720.3A CN102416690B (en) | 2011-12-06 | 2011-12-06 | Mold for evaluating appearance of plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102416690A true CN102416690A (en) | 2012-04-18 |
| CN102416690B CN102416690B (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110400720.3A Active CN102416690B (en) | 2011-12-06 | 2011-12-06 | Mold for evaluating appearance of plastic |
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| Country | Link |
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| CN (1) | CN102416690B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144253A (en) * | 2013-03-26 | 2013-06-12 | 苏州工业园区协利塑胶有限公司 | Thin-walled workpiece mould |
| CN110815731A (en) * | 2019-11-04 | 2020-02-21 | 宁波帅特龙集团有限公司 | Spectacle case production mold and production process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054390A (en) * | 1990-03-01 | 1991-09-11 | 吉林工业大学 | Technology for making plastics forming dies |
| CN1672112A (en) * | 2002-06-14 | 2005-09-21 | 基础技术公司 | Process and system for designing molds and dies |
| CN1837776A (en) * | 2005-03-23 | 2006-09-27 | 中南大学 | Spiral flow fluidity testing mould |
| KR20090073797A (en) * | 2007-12-31 | 2009-07-03 | 한국단자공업 주식회사 | Test mold assembly |
| CN201275849Y (en) * | 2008-08-29 | 2009-07-22 | 上海晨兴电子科技有限公司 | Light conducting board mold with adjusting device |
| CZ21104U1 (en) * | 2010-05-24 | 2010-07-12 | Technická univerzita v Liberci, Katedra strojírenské technologie, | Injection mold for producing test samples for testing plastic screws enabling variability of test sample size |
| CN202399468U (en) * | 2011-12-06 | 2012-08-29 | 金发科技股份有限公司 | Plastic appearance evaluation mould |
-
2011
- 2011-12-06 CN CN201110400720.3A patent/CN102416690B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054390A (en) * | 1990-03-01 | 1991-09-11 | 吉林工业大学 | Technology for making plastics forming dies |
| CN1672112A (en) * | 2002-06-14 | 2005-09-21 | 基础技术公司 | Process and system for designing molds and dies |
| CN1837776A (en) * | 2005-03-23 | 2006-09-27 | 中南大学 | Spiral flow fluidity testing mould |
| KR20090073797A (en) * | 2007-12-31 | 2009-07-03 | 한국단자공업 주식회사 | Test mold assembly |
| CN201275849Y (en) * | 2008-08-29 | 2009-07-22 | 上海晨兴电子科技有限公司 | Light conducting board mold with adjusting device |
| CZ21104U1 (en) * | 2010-05-24 | 2010-07-12 | Technická univerzita v Liberci, Katedra strojírenské technologie, | Injection mold for producing test samples for testing plastic screws enabling variability of test sample size |
| CN202399468U (en) * | 2011-12-06 | 2012-08-29 | 金发科技股份有限公司 | Plastic appearance evaluation mould |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144253A (en) * | 2013-03-26 | 2013-06-12 | 苏州工业园区协利塑胶有限公司 | Thin-walled workpiece mould |
| CN110815731A (en) * | 2019-11-04 | 2020-02-21 | 宁波帅特龙集团有限公司 | Spectacle case production mold and production process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102416690B (en) | 2014-09-24 |
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