CN206718373U - It is a kind of to eliminate the injection mold for exempting to spray thermoplastic current mark - Google Patents
It is a kind of to eliminate the injection mold for exempting to spray thermoplastic current mark Download PDFInfo
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- CN206718373U CN206718373U CN201720299753.6U CN201720299753U CN206718373U CN 206718373 U CN206718373 U CN 206718373U CN 201720299753 U CN201720299753 U CN 201720299753U CN 206718373 U CN206718373 U CN 206718373U
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- connection end
- breeze way
- die cavity
- runner
- expansion arc
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Abstract
The utility model provides a kind of injection mold for eliminating and exempting to spray thermoplastic current mark, cast gate including connecting passage and die cavity, the cast gate includes runner connection end and die cavity connection end, is formed by connecting successively by the first breeze way, expansion arc, the second breeze way between the runner connection end and die cavity connection end；First breeze way is sector from runner connection end to expansion arc direction；The expansion arc is heaved for arc-shaped；Second breeze way connects extreme direction from expansion arc to die cavity as sector.The mould solution, which efficiently solves, to be exempted to spray thermoplastic engineering plastic product existing current mark flaw defect in appearance, improves product appearance quality, considerable benefit is brought for production.
Description
Technical field
It the utility model is related to a kind of injection mold, and in particular to a kind of to eliminate the injection for exempting to spray thermoplastic current mark
Mould.
Background technology
Exempt from spray thermoplastic engineering plastic be intended to by material preparatory phase to material assign metal appearance effect, from
And exempt the technology link that the later stage sprays again to product outward appearance, it can so reduce production cost and shorten the construction cycle,
And can plays reduction in spraying process to the environmentally friendly purpose of the polluters such as poisonous caused by environment, pernicious gas.
The current technology path for exempting to spray thermoplastic engineering plastic is to add to have metallic luster in material preparatory phase
Metal powder pigment, the fully fusing, compound under the conveying of screw rod and shear action, then extrudes and cuts into particle after being well mixed
Shape material, it is processed into finally by injection molding without spraying and the product with metal appearance effect.
But more or less there are some current mark flaws in the Injection moulded part that practice finds to exempt to spray thermoplastic engineering plastic in appearance
Defect, this causes the presentation quality of product to receive discount greatly.The reason for thinking to cause this current mark by research has：1. the high score melted
Sub- material enters the die cavity of spaciousness by narrow nozzle, and the peculiar effect that swells of macromolecule causes melt that non-stationary flow occurs
It is dynamic, there is turbulent flow；2. metal powder pigment density is big, mobility is low, poor dispersion, and the melt for being mixed with metal powder pigment enters mould
After chamber, melt flow rate occurs drastically to change, and causes metal powder effectively can not uniformly be diffused into mould with macromolecule melt
Intracavitary, so as to occur the current mark flaw of metal powder reunion near cast gate.For these reasons, how to solve to allow to be mixed with metal
It is exactly technological difficulties urgently to be resolved hurrily at present that the melt of powder pigment, which reduces flow instabilities,.
Utility model content
To solve above technical deficiency, the utility model purpose is to provide a kind of eliminate and exempts to spray thermoplastic current mark
Injection mold.
To achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of elimination exempts to spray the injection mold of thermoplastic current mark, including the cast gate of connecting passage and die cavity, described
Cast gate includes runner connection end and die cavity connection end, successively by the first buffering between the runner connection end and die cavity connection end
Section, expansion arc, the second breeze way are formed by connecting；First breeze way is sector from runner connection end to expansion arc direction；Institute
Expansion arc is stated to heave for arc-shaped；Second breeze way connects extreme direction from expansion arc to die cavity as sector.
Further scheme, it is round and smooth excessively by the first linkage section between first breeze way and expansion arc；The expansion
It is round and smooth excessively by the second linkage section between section and the second breeze way.
Further scheme, the runner connection end are provided with slag well with runner junction, and the diameter of the slag well is equal
In the diameter of runner, the length of slag well is 4 times of flow diameter.
Cast gate in the present invention is located at the side die parting line position of injection mold.
The thickness of the utility model mould gate calculates gained using following formula：
H is the thickness of cast gate in above formula, and t is the thickness of product to be molded.
The utility model is set about in terms of mould, and creative provide a kind of is different from current existing pouring gate structure
New design, so as to efficiently solve the effect that swells of macromolecule melt, melt is allowed to enter after die cavity based on steady flow,
Flowing velocity is steady, equably fills mould, solves the problems, such as current mark, improve product appearance quality, reduce injection it is bad
Product rate, considerable benefit is brought for production.
Compared with prior art, possesses advantages below：
1. completely eliminate the outward appearance for exempting to spray current mark flaw on thermoplastic engineering plastic Injection moulded part in terms of mould to lack
Fall into, improve the adaptability to material.
2. pouring gate structure of the present utility model can allow the macromolecule melt effect that swells to be released at cast gate position, melt is allowed
After into die cavity based on steady flow, flowing velocity is steady, uniform pack mould, so as to solve the problems, such as current mark, improves
Product appearance quality, injection defective products rate is reduced, considerable benefit is brought for production.
3. the utility model is provided with slag well in runner connection end and the junction of runner, so as to greatly help solve current mark
Flaw.
4th, gate thickness of the present utility model is designed according to the thickness of product to be molded, so as to improve to material
The adaptability of material, reduce injection defective products rate.
5. mould of the present utility model solves the problems, such as to exempt to spray thermoplastic engineering plastic Injection moulded part outward appearance current mark flaw,
Extend to exempting to spray thermoplastic engineering plastic using limitation, add material compatibility.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of the cast gate in the utility model.
In figure：1- cast gates, 1.1- runners connection end, the breeze ways of 1.2- first, the linkage sections of 1.3- first, 1.4- expansion arcs,
The linkage sections of 1.5- second, the breeze ways of 1.6- second, 1.7- die cavitys connection end, 2- die cavitys, 3- runners, 4- slag wells.
Embodiment
The utility model is further described below in conjunction with specific embodiment.
Embodiment 1：
As shown in Figure 1, 2, it is a kind of to eliminate the injection mold for exempting to spray thermoplastic current mark, including connecting passage 3 and mould
The cast gate 1 of chamber 2, the cast gate 1 include runner connection end 1.1 and die cavity connection end 1.7, the runner connection end 1.1 and die cavity
It is formed by connecting successively by the first breeze way 1.2, expansion arc 1.4, the second breeze way 1.6 between connection end 1.7；First buffering
Section 1.2 is sector from runner connection end 1.1 to the direction of expansion arc 1.4；The expansion arc 1.4 is heaved for arc-shaped；Described second
Breeze way 1.6 is sector from expansion arc 1.4 to the direction of die cavity connection end 1.7.
Further scheme, it is round and smooth excessive by the first linkage section 1.3 between first breeze way 1.2 and expansion arc 1.4；
It is round and smooth excessive by the second linkage section 1.5 between the breeze way 1.6 of expansion arc 1.4 and second.
The runner connection end 1.1 is provided with slag well 4 with the junction of runner 3, and the diameter of the slag well is equal to runner 3
Diameter, the length of slag well is 4 times of flow diameter.
Cast gate 1 in the present invention is located at the side die parting line position of injection mold.
Further scheme, the thickness of the cast gate 1 calculate gained using following formula：
H is the thickness of cast gate in above formula, and t is the thickness of product to be molded.
It is raw materials used in following embodiment 2-5 to be：
Acrylonitrile-butadiene-styrene resin is the ABS750A of domestic grand celebration.
The steady agent of light for Changchun chemical industry UV-531 and LA-292 compounding (weight compares UV-531：LA-292=3:2).
Heat stabilizer is Hinered phenols (AO-50 of Changchun chemical industry) and phosphorous acid esters (the 2112 of Changchun chemical industry) (weight
Than AO-50: 2112=1：2).
Processing aid is domestic commercially available EBS.
Metal powder pigment be domestic Triratna chemical industry aluminium silver powder, sheet, particle diameter 18um.
Its raw material prepares as follows：By 92 parts of grand celebration ABS750A, (weight compares UV-531 for 2 parts of steady agent of light：LA-292=3:2),
(weight is than AO-50: 2112=1 for 2 parts of heat stabilizers：2), 2 parts of processing aid EBS, the aluminium silver powder of 2 parts of Triratna chemical industry is through high-speed stirring
Mix well mixed, then mixed, melted by double screw extruder, pelletizing is into exempting to spray ABS composite material particle.
Article surface current mark degree, article surface metal effect brightness are detected, judges that definition is shown in Table 1,2.
The article surface current mark grade of table 1 judges definition
The article surface metal effect brightness of table 2 judges definition
Embodiment 2
Using outer casing mold on the notebook computer of the pouring gate structure of embodiment 1, and cast gate is located in the side of outer casing mold
Side die parting line position, gate thickness 1.05mm；The a diameter of 8mm of slag well, slag well length are 32mm.Above-mentioned ABS is compound
Material particles are molded into product by outer casing mold on the notebook computer, article surface current mark degree, the article surface metal
Effect brightness, the results are shown in Table 3.
Comparative example 1
Using outer casing mold on the notebook computer of conventional down gate structure, center is entered to pour and without slag well, by above-mentioned ABS
Composite particles are molded into product by outer casing mold on the notebook computer, article surface current mark degree, the article surface
Metal effect brightness, the results are shown in Table 3.
Embodiment 3
Using the Automobile Dashboard panel mould of the pouring gate structure of embodiment 1, and cast gate is located in the side of outer casing mold
Side die parting line position, gate thickness 0.94mm；The a diameter of 6mm of slag well, slag well length are 24mm.Above-mentioned ABS is compound
Material particles are by the Automobile Dashboard panel mold injection into product, article surface current mark degree, the article surface metal
Effect brightness, the results are shown in Table 3.
Comparative example 2
Side is carried out using the Automobile Dashboard panel mould of conventional edge rectangle pouring gate structure to enter to pour, sprue and runners
Junction is provided with slag well, slag well diameter 6mm, length 6mm, above-mentioned ABS composite material particle is passed through into the automobile pair instrument
Plate panel mold injection the article surface current mark degree, article surface metal effect brightness, the results are shown in Table 3 into product.
Embodiment 4
Mould is switched using the car door front panel storage tank of the pouring gate structure of embodiment 1, and cast gate is located in shell
The side die parting line position of mould, gate thickness 1.14mm；The a diameter of 6mm of slag well, slag well length are 24mm.Will be above-mentioned
ABS composite material particle switchs mould by the car door front panel storage tank and is molded into product, the article surface current mark journey
Degree, article surface metal effect brightness, the results are shown in Table 3.
92 parts of grand celebration ABS750A, (weight compares UV-531 for 2 parts of steady agent of light：LA-292=3:2), 2 parts of heat stabilizer (weights
Amount is than AO-50: 2112=1：2), 2 parts of processing aid EBS, the aluminium silver powder of 2 parts of Triratna chemical industry are well mixed through high-speed stirred, so
Mixed, melted by double screw extruder afterwards, pelletizing into exempt from spray ABS composite material particle, then pass through instrument before car door
Plate storage tank switchs mold injection molding.Mould is using mentioning mould solution in the utility model：Cast gate uses this practicality
New pouring gate structure in new, cast gate are located in part forming die side, die parting line, gate thickness 1.14mm；Slag well diameter
For 6mm, slag well length is 24mm.Injection, which is produced, exempts from spray car instrument board storage tank switch product in front of the door.
Article surface current mark degree, article surface metal effect brightness are detected, the results are shown in Table 3.
Comparative example 3
Using normal edge pin-point gate structure car door front panel storage tank switch mould carry out center enter to pour, cast gate with
Runner junction is without slag well.Above-mentioned ABS composite material particle is switched into mould by the car door front panel storage tank to note
Product is moulded into, the article surface current mark degree, article surface metal effect brightness, the results are shown in Table 3.
The article surface appearance test result of table 3
By above example and comparative example, using novel injection molding pouring gate structure mould of the present utility model, injection molding
The product outward appearance current mark gone out is effectively eliminated, and metal effect is notable, improves product specification.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this reality
With new.Person skilled in the art obviously can easily make various modifications to these embodiments, and saying herein
Bright General Principle is applied in other embodiment without by performing creative labour.Therefore, the utility model is not limited to this
In embodiment, according to announcement of the present utility model, do not depart from that the utility model category made changes those skilled in the art
Entering and change all should be within the scope of protection of the utility model.
Claims (4)
1. a kind of eliminate the injection mold for exempting to spray thermoplastic current mark, including connecting passage（3）And die cavity（2）Cast gate
（1）, it is characterised in that：The cast gate（1）Including runner connection end（1.1）With die cavity connection end（1.7）, the runner connection end
（1.1）With die cavity connection end（1.7）Between successively by the first breeze way（1.2）, expansion arc（1.4）, the second breeze way（1.6）Even
Connect and form；First breeze way（1.2）From runner connection end（1.1）To expansion arc（1.4）Direction is sector；The expansion arc
（1.4）Heaved for arc-shaped；Second breeze way（1.6）From expansion arc（1.4）To die cavity connection end（1.7）Direction is fan
Shape.
2. injection mold according to claim 1, it is characterised in that：First breeze way（1.2）And expansion arc（1.4）
Between pass through the first linkage section（1.3）It is round and smooth excessive；The expansion arc（1.4）With the second breeze way（1.6）Between pass through second
Linkage section（1.5）It is round and smooth excessive.
3. injection mold according to claim 1, it is characterised in that：The runner connection end（1.1）With runner（3）Connection
Place is provided with slag well（4）, the slag well（4）Diameter be equal to runner（3）Diameter, slag well（4）Length be runner
4 times of diameter.
4. injection mold according to claim 1, it is characterised in that：The cast gate（1）Positioned at the side of injection mold point
Loft position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720299753.6U CN206718373U (en) | 2017-03-26 | 2017-03-26 | It is a kind of to eliminate the injection mold for exempting to spray thermoplastic current mark |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720299753.6U CN206718373U (en) | 2017-03-26 | 2017-03-26 | It is a kind of to eliminate the injection mold for exempting to spray thermoplastic current mark |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206718373U true CN206718373U (en) | 2017-12-08 |
Family
ID=60502461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720299753.6U Active CN206718373U (en) | 2017-03-26 | 2017-03-26 | It is a kind of to eliminate the injection mold for exempting to spray thermoplastic current mark |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206718373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370552A (en) * | 2019-08-27 | 2019-10-25 | 庄佳敏 | A kind of vehicle side assembly mold for fixing splendid injection molding anti-foaming |
-
2017
- 2017-03-26 CN CN201720299753.6U patent/CN206718373U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370552A (en) * | 2019-08-27 | 2019-10-25 | 庄佳敏 | A kind of vehicle side assembly mold for fixing splendid injection molding anti-foaming |
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