CN202097903U - Flash groove of mold with fan gate - Google Patents
Flash groove of mold with fan gate Download PDFInfo
- Publication number
- CN202097903U CN202097903U CN2011201375463U CN201120137546U CN202097903U CN 202097903 U CN202097903 U CN 202097903U CN 2011201375463 U CN2011201375463 U CN 2011201375463U CN 201120137546 U CN201120137546 U CN 201120137546U CN 202097903 U CN202097903 U CN 202097903U
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- fan gate
- groove
- flash
- flash groove
- mould
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Abstract
The utility model discloses a flash groove of a mold with a fan gate, which comprises a molding plate. A cavity, a main melt inlet and a runner are arranged on the molding plate; the cavity and the main melt inlet are connected through the runner; the fan gate and the flash groove are further arranged on the molding plate; the fan gate is positioned at the tail end of the runner and communicated with the cavity; and the flash groove encircles the molding plate. The utility model has the technical effects that the flash groove with a U-shaped or V-shaped cross section is formed on the mold to collect overflow materials; and particularly, the cross section of the flash groove is designed to be a semi-circle with a diameter of 10 mm to collect more overflow materials, so as to reduce the damage of overflow materials to products.
Description
Technical field
The utility model relates to a kind of mould, relates in particular to a kind of flash groove of fan gate mould.
Background technology
Flash is claimed overlap again, the limit of overflowing etc., occur in mostly on the mould deciliter position, as the decomposition face that gathers, the slide assembling part position of slide block, the slit of mold insert, the space of push rod etc. is located.If the untimely solution of overlap will further be magnified, thereby forming local falling into, impressing mould collapses, finally possibly make nonvolatil infringement.The flash in mold insert slit and push rod space also can make goods be stuck on the mould, influences the demoulding.The generation reason of flash has following four kinds: (1) mold clamping force is not enough; (2) the material temperature is too high; (3) mold defect; (4) process conditions control is improper.
Chinese patent CN 201183304Y discloses a kind of mold runner structure that penetrates flash of slowing down, and has runner on this mould, and its upper and lower mould closes the closed surface that face is higher than runner, and both drops are greater than five centimetres, and runner comprises that main flow arrives and secondary channels.This patent produces the melten gel gravity flow track overflow up and down empty avoiding band of die face because of the full mould moment back pressure of die cavity causes runner hydraulic pressure to press greater than the board matched moulds through changing runner die face structure on every side when having avoided the melten gel ejection formation.But this patent has just been slowed down the ejaculation flash, and does not in time handle or flash is collected for the melten gel that overflows.
The utility model content
The purpose of the utility model provides a kind of flash groove of mold flashing groove, is that the groove of U-shaped or V-arrangement is collected flash through the cross section is set around the mould, has reduced the damage of flash to product.
In order to achieve the above object; The utility model provides a kind of flash groove of fan gate mould; Comprise a template, said template is provided with die cavity, melten gel main-inlet and connects said die cavity and the runner of said melten gel main-inlet, also is provided with fan gate and flash groove on the said template; Said fan gate is positioned at the terminal of said runner and connects with said die cavity, said flash groove be enclosed in said template around.
The flash groove of above-mentioned fan gate mould, the cross section of said mold flashing groove is the U font.
The flash groove of above-mentioned fan gate mould, the cross section of said mold flashing groove are semicircle.
The flash groove of above-mentioned fan gate mould, the diameter of the cross section of said mold flashing groove are 10mm.
The flash groove of above-mentioned fan gate mould, the cross section of said mold flashing groove becomes V-shape.
The flash groove of above-mentioned fan gate mould, said fan gate is fan-shaped.
The flash groove of above-mentioned fan gate mould, said template are provided with four die cavities, and each said die cavity is a corresponding fan gate respectively.
It is that the flash groove of U-shaped or V-arrangement is collected flash that the technique effect of the utility model is on mould, to be provided with the cross section, especially with flash groove be designed to the cross section be the semicircle of diameter 6mm to collect more flash, reduced the damage of flash to product.
Description of drawings
Through the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.
The sketch map of Fig. 1 the utility model fan gate mold flashing groove;
Fig. 2 is the generalized section of mold flashing groove.
The reference numeral explanation:
The 1-template, 2-fan gate, 3-runner, 4-die cavity, 5-flash groove.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further explain.
Pressing mold is that raw material is put into the reinforced chamber of mould under the forming temperature, makes its pressurized that is heated, and becomes molten condition and is full of whole die cavity.Behind the plastic solidified forming, upper and lower mould is opened and is utilized liftout attachment to eject plastic, thereby obtains required goods, is mainly used in the moulding of thermosetting melten gel.Be characterized in that simple, no running gate system, material consume less, product deformation is little, contraction is little, anisotropy is little.The typical structure of compression molding is a fixed compression mould, and its upper and lower mould all is fixed on the press, and operations such as die sinking, matched moulds, the demoulding are all carried out in press, and production efficiency is high, and simple to operate, labour intensity is little, and the die sinking vibration is little, and die life is long.But its complex structure, cost is high, and lays the inserts inconvenience.Be applicable to be shaped big in batches or the bigger plastic of shape.The compression forming of thermosetting melten gel need be spent under the higher temperature and carried out; Therefore mould must heat, and common mode of heating has electrical heating, Steam Heating, coal gas or natural gas heating etc., and electrical heating is used general; But it maintains trouble, and temperature homogeneity is difficult to control.What high-precision compression molding application was more is to adopt the oil heating, and its heating-up temperature can guarantee high conformity, and the low while of cost can prolong the service life of mould.
The version that cooperates according to the mould upper and lower mould can be divided into excessive formula, half overflow formula and three kinds of the formulas of not overflowing.
The formula mould that overflows is made up of upper die and lower die two parts, and two-part up and down accurate closure guarantees that by leading dowel the demoulding of goods leans on knock-pin to accomplish, but small-sized excessive formula mould is not necessarily led dowel and knock-pin.This mould structure is fairly simple, processing ease, and low cost of manufacture, comparatively suitable to compacting flat disk or butterfly-shaped goods, be applicable to compacting all kinds melten gel.But, should not suppress the big melten gel of shrinkage factor because of former is more shallow.When mold pressing, unnecessary material can overflow.Because the flash relation, mold closing can not be too slow during compacting, forms thicker burr otherwise flash, and it is time-consuming to remove burr, and products appearance is also influenced.Mold closing can not be too fast, otherwise spill more material, and the molding pressure partial loss is on the supporting surface of mould, and extrudate density descends, and performance reduces.Flash groove is used to the generation of overflowing unnecessary melten gel, preventing weld mark.It is opened at the position that is prone to weld mark, or is opened on the die joint.The size of flash groove should be suitable, and the excessive then flash of groove is too much, plastic tissue looseness or scarce material, and the too small then flash of groove is not enough.Generally speaking, groove width 3-4mm, dark 0.1-0.2mm is through the die trial correction.
Flashless mold is claimed closed pressing mold again, and this mould has feed compartment, and its section configuration and die cavity are identical, and feed compartment is the continuity on die cavity top.Do not have squish lip, but patrix and counterdie have highly little matched in clearance, about the about 0.075mm of general every limit gap width, melten gel unnecessary during compacting overflows along fit clearance, makes plastic form the burr of vertical direction.After the mould closes, patrix and counterdie promptly form airtight die cavity fully, and the pressure of press almost can be passed to melten gel fully during compacting.It is big that the characteristics of positive mould are that plastic bears pressure, so density is good, intensity is high.Positive mould is because the spill-out of melten gel is few. so the height dimension that how much directly affects plastic of feeding quantity; The reinforced all accurately weighings of every mould; So the plastic height dimension be difficult for to guarantee, so good fluidity, the melten gel that by volume measures easily generally do not adopt positive mould.Patrix and feed compartment sidewall friction can abrade the feed compartment sidewall inevitably, and simultaneously, the sectional dimension of feed compartment is identical with the die cavity cross section, and the feed compartment that when ejecting, has scar can damage the plastic outer surface.Positive mould must be provided with ejecting device, otherwise plastic is difficult to take out.
Fig. 1 shows the utility model fan gate mold flashing groove.The fan gate mould comprises a template 1, and the runner 3 that template 1 is provided with die cavity 4, melten gel main-inlet and connects die cavity 4 and melten gel main-inlet also is provided with fan gate 2 on the template 1, and fan gate 2 is positioned at the terminal of runner 3 and connects with die cavity 4.Runner 3 can be a sprue, also can be the runner that is separated by sprue.Fan gate 2 is fan-shaped.Fan gate 2 less ends are communicated with runner 3, and fan gate 2 more ends are communicated with die cavity 4.The thickness of the end that fan gate 2 is less is greater than the thickness of the bigger end of fan gate 2.Template 1 is provided with four die cavities 4, and each die cavity 4 is a corresponding fan gate 2 respectively.Also be provided with flash groove 5 on the template 1, flash groove 5 be enclosed in said template 1 around.
Fig. 2 is the generalized section of mold flashing groove.The cross section of flash groove 5 is the U font.The cross section of flash groove 5 is semicircle.Further, the diameter of the cross section of flash groove 5 is 10mm.The cross section of flash groove 5 also can become V-shape.
It should be noted that; Above content is the further explain that combines concrete embodiment that the utility model is done; The specific embodiment that can not assert the utility model only limits to this; Under the above-mentioned guidance of the utility model, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improve or distortion drops in the protection domain of the utility model.
Claims (7)
1. the flash groove of a fan gate mould comprises a template, and said template is provided with die cavity, melten gel main-inlet and connects said die cavity and the runner of said melten gel main-inlet, it is characterized in that:
Also be provided with fan gate and flash groove on the said template, said fan gate is positioned at the terminal of said runner and connects with said die cavity, said flash groove be enclosed in said template around.
2. the flash groove of fan gate mould according to claim 1 is characterized in that:
The cross section of said mold flashing groove is the U font.
3. the flash groove of fan gate mould according to claim 1 is characterized in that:
The cross section of said mold flashing groove is semicircle.
4. the flash groove of fan gate mould according to claim 3 is characterized in that:
The diameter of the cross section of said mold flashing groove is 10mm.
5. the flash groove of fan gate mould according to claim 1 is characterized in that:
The cross section of said mold flashing groove becomes V-shape.
6. the flash groove of fan gate mould according to claim 1 is characterized in that:
Said fan gate is fan-shaped.
7. the flash groove of fan gate mould according to claim 1 is characterized in that:
Said template is provided with four die cavities, and each said die cavity is a corresponding fan gate respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201375463U CN202097903U (en) | 2011-05-04 | 2011-05-04 | Flash groove of mold with fan gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201375463U CN202097903U (en) | 2011-05-04 | 2011-05-04 | Flash groove of mold with fan gate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202097903U true CN202097903U (en) | 2012-01-04 |
Family
ID=45383936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201375463U Expired - Fee Related CN202097903U (en) | 2011-05-04 | 2011-05-04 | Flash groove of mold with fan gate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202097903U (en) |
-
2011
- 2011-05-04 CN CN2011201375463U patent/CN202097903U/en not_active Expired - Fee Related
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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: 20120104 Termination date: 20120504 |