CN204526078U - A kind of combined type extrusion die - Google Patents
A kind of combined type extrusion die Download PDFInfo
- Publication number
- CN204526078U CN204526078U CN201520106178.4U CN201520106178U CN204526078U CN 204526078 U CN204526078 U CN 204526078U CN 201520106178 U CN201520106178 U CN 201520106178U CN 204526078 U CN204526078 U CN 204526078U
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Abstract
The utility model relates to a kind of combined type extrusion die of many mouthfuls of moulds composition, comprise: a current divider, described current divider is made up of upper die head and lower die head, the junction of described upper die head and lower die head is formed with the branch chamber for shunting, spreader is provided with in described branch chamber, branch chamber two ends are feed end and discharge end, and the region beyond the branch chamber on upper die head and lower die head is provided with connecting hole; Mouth mould portion, described mouth mould portion is provided with die cavity, and mouth mould portion is fixedly connected with the discharge end of current divider; A connector, described connector is connected with the feed end of current divider.The working of plastics of irregularity can be made from molten condition sizing gradually by such design, make after the extrusion that shape distortion is less; The elliptical gear of fluid in runner is little; Fluid flow resistance is little, energy consumption is low.
Description
Technical field
The utility model relates to a kind of extrusion die, particularly relates to a kind of combined type extrusion die of many mouthfuls of moulds composition.
Background technology
In plastic shaping field, extrusion molding utilizes screw rod rotary presser mode, continuously the plastics plastified got into mould, during mouth mould by definite shape, obtains the process of the plastic material adapted with Oral incision.The plastic product of extrusion molding accounts for plastic products about 30%, is mainly used in the various plastic materials that cross section is certain, length is large, as the special section of plastic tube, plate, rod, sheet, band, material and cross section complexity.Its feature be can progressive forming, productivity ratio is high, mould structure is simple, cost is low, tissue tight etc.Except fluoroplastics, nearly all thermoplastic can extrusion molding, and part thermosetting plastics also can extrusion molding.
Granular or powdered plastic sends into screw propulsion room from hopper, then delivers to thermal treatment zone melting by the screw rod rotated, and is compressed; Under the effect of spiral force, force it by the effigurate extrusion die of tool, obtain the section bar consistent with mouth mode cross section shape; The hardening plastic part obtaining solidifying of its cooling is made with injection air or water after falling conveyer belt.
When producing irregular section bar, often because the plastics of melting are fluid when flow export mould, usually can deform not in time due to cooling.The particularly extrusion profile of some structure irregularities, not only there will be the problem that malformation also there will be section bar uneven thickness.
Summary of the invention
Task of the present utility model is to provide a kind of continuous uniform that can obtain when producing irregularity section bar to extrude and shape is out of shape little extrusion die.Comprise:
One current divider, described current divider is made up of upper die head and lower die head, the junction of described upper die head and lower die head is formed with the branch chamber shunted for molten plastic, spreader is provided with in described branch chamber, branch chamber two ends are feed end and discharge end, and the region correspondence beyond the branch chamber on upper die head and lower die head is provided with connecting hole;
Mouth mould portion, described mouth mould portion is provided with die cavity, and mouth mould portion is fixedly connected with the discharge end of current divider;
A connector, the discharging opening of described connector is connected with the feed end of current divider; The discharging opening of described connector is corresponding consistent with the shape of the feed end of current divider.
Further, the shape of described spreader is similar isosceles triangle, and the drift angle of described spreader is close to described feed end, and its base is near described discharge end and be parallel to or be basically parallel to described discharge end edge.
Further, described mouth mould portion is fixedly connected sequentially by least three pieces of mouth templates and forms, and at least two pieces of mouth templates wherein near current divider constitute mouthful compression section in mould portion, and at least one piece of mouth template away from current divider constitutes mouthful flat segments in mould portion; The die cavity angle of the starting block mouth template of the close current divider in described compression section is 20-30 degree, and the die cavity angle of the end block mouth template in described compression section is 12-25 degree; Be provided with dividing plate along direction of flow in the die cavity of described compression section, the gap between described adjacent separator is 5-7 times of extruded product thickness; Cavity dimension in described flat segments is the 102%-105% of product size.
Further, described mouth mould portion is fixedly connected sequentially by seven pieces of mouth templates and forms, and described mouth template seven, mouth template six, mouth template play the compression section in composition mouth mould portion May Day, and mouth template four is to the flat segments in mouth template one or four pieces of mouth template composition mouth mould portions; Wherein mouth template seven is the starting block mouth template of compression section and is fixed together with the discharge end of described current divider, and mouth template five is the end block mouth template of compression section and is connected with mouth template four.
Further, the starting block mouth template of compression section, described mould portion and the die cavity of end block template there is plano-concave section and be positioned at plano-concave section two ends and with raised section of the smooth connection of plano-concave section; The import department of described raised section is that level upwards designs to export department, and the import department of described plano-concave section is that level designs downwards to export department.
Further, the branch chamber exterior lateral area of described upper and lower die head is processed with groove.
Further, described connector, current divider, mouth mould are positioned by alignment pin between portion.
Further, described mold outer surface is provided with heating plate installing hole.
The mould of this structure is adopted to have following beneficial effect:
1, arranged by many mouth templates extrusion plastic stablizing gradually can be made shaping, therefore design of the present utility model can make the working of plastics of irregularity shape gradually from molten condition, can ensure that shape of product distortion is after the extrusion enough little.
2, angle by being set to designed by the utility model by the charging aperture of mouth mould portion compression section mouth template to the die cavity angle of discharging opening, can be conducive to plastic liquid and effectively complete sizing smoothly by many mouth templates when getting into and extruding; Adopt the cavity dimension design of the utility model mouth mould portion flat segments, can extruded product can be made after fully taking into account the shrinkage factor of plastic liquid to complete after cooling forming to shape and within the margin of tolerance falling into size.
3, in the die cavity of compression section, mouth mould portion, dividing plate is set along fluid flow direction, and by the gap between described dividing plate be product thickness 5-7 doubly, effectively can prevent plastic liquid turbulent flow in die cavity, thus ensure that the directed flow of fluid is to reduce fluid flow resistance and energy ezpenditure.
4, further, mouth template is set to polylith as being preferably seven pieces, connecting plate is set between the feed end and discharge end of compression section, and rebound is set between compression section and flat segments, all can play the impact flow effectively reducing and produce when fluid moves in mouth mould portion.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of a kind of combined type extrusion die of the utility model;
Fig. 2 is the structural representation of another angle of Fig. 1;
Fig. 3 is the die head schematic diagram in Fig. 1 in current divider;
Fig. 4 is the structural representation of a mouth template of compression section, Fig. 1 mouth mould portion;
Fig. 5 is the structural representation of connector in Fig. 1.
Description of reference numerals:
10-current divider, 12-upper die head, 14-lower die head, 16-branch chamber, 162-spreader, 164-feed end, 166-discharge end, 18-connecting hole, 20-mouth mould portion, 21-die cavity, 212-dividing plate, 22-fixing hole, 23-mouth template one, 24-mouth template two, 25-mouth template three, 26-mouth template four, 27-mouth template five, 28-mouth template six, 29-mouth template seven, 30-connector, 40-dowel hole.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of each component involved in detailed description of the invention of the present utility model, structure, each several part and annexation, each several part and operation principle etc. are described in further detail.
As shown in Figures 1 to 4, the present embodiment combined type extrusion die is made up of connector 30, current divider 10 and mouth mould portion 20, connector 30 is for being connected mold runner with plastic extruder, connector 30 is a flange in the present embodiment, and this flange is fixed together by bolt and current divider 10.
The current divider 10 of the present embodiment is combined by upper die head 12 and lower die head 14, and edge's correspondence of upper and lower die head is provided with connecting hole 18, does not occur to leak material for making upper and lower die head closely cooperate.Described upper die head 12 is formed with the junction of lower die head 14 branch chamber 16 shunted for molten plastic, spreader 162 is provided with in described branch chamber 16, branch chamber 16 two ends are feed end 164 and discharge end 166, and the region correspondence beyond the branch chamber 16 on upper die head 12 and lower die head 14 is provided with connecting hole 18; The shape of described spreader 162 is similar isosceles triangle, and the drift angle of described spreader 162 is close to described feed end 164, and its base is near described discharge end 166 and be parallel to or be basically parallel to described discharge end 166 edge.
The mouth mould portion 20 of the present embodiment is provided with die cavity 21, and mouth mould portion 20 is fixedly connected with the discharge end 166 of current divider 10, described mouth mould portion 20 is fixedly connected sequentially by least three pieces of mouth templates and forms, wherein, at least two pieces of mouth templates near current divider 10 constitute mouthful compression section in mould portion 20, and at least one piece of mouth template away from current divider 10 constitutes mouthful flat segments in mould portion 20.The die cavity angle of the starting block mouth template of the close current divider in described compression section is 20-30 degree, and the die cavity angle of the end block mouth template in described compression section is 12-25 degree.Be provided with dividing plate 212 along direction of flow in the die cavity of described compression section, the gap between described adjacent separator 212 is 5-7 times of product thickness; Distance current divider 10 mouth template is farthest mouthful flat segments in mould portion 20, and the cavity dimension in described flat segments is the 102%-105% of product size.
As preferably, the mouth mould portion of the present embodiment is fixedly connected sequentially by seven pieces of mouth templates and forms, and the numbering of each mouth template is followed successively by template 1, mouth template 2 24, mouth template 3 25, mouth template 4 26, mouth template 5 27, mouth template 6 28, mouth template 7 29.Described mouth template 7 29, mouth template 6 28, mouth template 5 27 form the compression section in mouth mould portion together, and mouth template 4 26 is to the flat segments in mouth template one 23 four pieces of mouth template composition mouth mould portions; Wherein mouth template 7 29 is the starting block mouth template of compression section and is fixed together with the discharge end 166 of described current divider 10, and mouth template 5 27 is the end block mouth template of compression section and is connected with mouth template 4 26.Wherein mouth template 7 29 is fixed together with the discharge end 166 of current divider 10, and discharge end 166 corresponding matching of die cavity on mouth template 7 29 and current divider 10.
In order to obtain final extruded product smoothly, the die cavity angle of mouth template 5 27 is processed into 12-25 degree, and the die cavity angle on mouth template 7 29 is processed into 20-30 degree, described angle finger-type chamber median plane angle with respect to the horizontal plane.Die cavity transition connector template 7 29 on mouth template 6 28 and the die cavity on mouth template 5 27, make the plastic liquid of molten condition can from the round and smooth die cavity being transitioned into mouth template 5 27 of mouth template 7 29.
In order to ensure that the plastic liquid of molten condition does orderly, the parallel and mutual motion do not mixed in die cavity, in the die cavity of every block mouth template of compression section, a segment distance is provided with the dividing plate 212 consistent with direction of flow, different according to the viscosity of variety classes plastics, the distance between dividing plate 212 is set as the 5-7 of extruded product thickness doubly.Can the directed flow of reinforced plastics by arranging dividing plate, effectively prevent the plastics of molten condition from die cavity 21, turbulent phenomenon occurring, and cause that fluid flow resistance in die cavity 212 increases, energy ezpenditure increases.
As shown in Figure 1, 2, the mouth template 1 of the present embodiment is the flat segments in mouth mould portion 20 to mouth template 4 26, wherein the mouth template 4 26 of flat segments links together with the mouth template 5 27 of compression section, mouth template 4 26 mainly in order to carry out transition between compression section and flat segments, to regulate the active force with buffer compression section.In order to be convenient to installing port template when die trial, usually the thickness of mouth template 4 26 is processed into more thinner than other mouth templates.In flat segments mainly in order to ensure that extruded product preform is stablized, so mouth template 1 is roughly the same with the shape and structure of extruded product to the shape of mouth template 4 26, but because plastic products are after cooling, solidification also demoulding shaping, its size and original mould size have certain difference, and the volume of plastic extrusion product can shrink under normal circumstances.According to the difference of plastic shrink rate, mouth template 1 is the 102%-105% of extruded product size to the cavity dimension on mouth template 4 26.
In addition, mouth template is also processed with dowel hole 40 and fixing hole 22, accurately locates when mounted to ensure that the docking of each mouth template upper impression 21 is accurate for mouth template.When Design of Dies, consider the convenience that the shaping needs of product, mach characteristic and mould are installed, the mouth template of normal employing different-thickness is assembled.So mouth mould portion 20 is positioned at the mouth template of flat segments, its thickness is comparatively close.Mouth template 5 27 arrives the compression section of mouth template 7 29 as mouth mould portion 20, for the ease of the pressure providing sufficient to the molten plastic of flat segments, is often designed to different thickness.The outer surface of mould is processed with various installing hole for installing the such as auxiliary equipment such as heating plate, hoisting ring.
Upper die head 12 structural representation as shown in Figure 3, be processed with branch chamber 16 in the side of this upper die head 12, branch chamber 16 extends to opposite side from the side of upper die head 12.The cavity structure of die head is symmetrical up and down under normal circumstances, the shunting that molten plastic can be symmetrical and stable can be ensured like this, therefore the structure of the branch chamber 16 of the present embodiment is similar isosceles triangle, be similar in branch chamber 16 and be provided with the consistent spreader of shape 162, the structure of this spreader 162 is also in class isosceles triangle.
The drift angle of spreader 162 is close to described feed end 164, and its base is near described discharge end 166 and be parallel to or be basically parallel to described discharge end 166 edge.The size of this spreader 162 is less than branch chamber 16 on the whole, so just forms the runner for divert molten plastic flow flowing between, the isosceles triangle that varies in size similar two shapes.Divert molten plastic flow flows to branch chamber 16 from the feed end 164 of branch chamber 16, and being then divided into two through the top of spreader 162 enters into the runner on spreader 162 both sides, and the runner place finally jointly formed on spreader 162 and branch chamber 16 base converges.The plastics that so just can realize the molten condition flowed out from current divider 10 discharge end 166 flow to a mouthful mould portion 20 according to design needs.
Seal to enable runner and do not leak material, the faying face of usual die head up and down installs the parts or structure with sealing function additional, is be typically employed in mould both sides in the extrusion die of through type to install the mode of side plate additional to seal runner at runner.In the present embodiment because runner is not bypass structure, but the cavity of relative closure, just can ensure not leak material so only need the faying face of upper and lower die head to be tightly connected.For this reason, for guaranteeing that runner sealing does not leak material, the present embodiment is processed with groove in the exterior lateral area correspondence of the branch chamber 16 of upper and lower die head, and in groove, correspondence is processed with connecting hole 18.Can avoid like this causing contact surface out-of-flatness because of machining, make to occur in conjunction with untight phenomenon during upper and lower die-head combination, thus effective reduction leaks the possibility of expecting.The plane simultaneously contacted with mouth mould portion 20 on the discharge end 166 of upper and lower die head 12 is provided with some fixing holes 22 for being linked together in mouth mould portion 20 and current divider 10, and the fixing hole on upper and lower die head is tapped blind hole.
As shown in Figure 4, mouth template is provided with fixing hole 22, dowel hole 40 and die cavity 21.The setting of fixing hole 22 installs consistent with the fixed hole position on die head.Cavity shape on every block mouth template of mouth compression section, mould portion 20 is similar.
The extrusion die of the present embodiment be in order to process extrude shape be middle for plano-concave two ends be raised product, therefore the die cavity of described mouth mould portion every block mouth template be all with extruded product mating shapes have plano-concave section be positioned at plano-concave section two ends and with raised section of the smooth connection of plano-concave section.For making fluid better effects if when flowing through compression section preformed, flow passage resistance force of waterproof is less, the starting block mouth template of the present embodiment compression section and the import department of raised section of end block template die cavity are that level upwards designs to export department, and the import department of described plano-concave section is that level designs downwards to export department.Be illustrated in figure 4 the cavity structure schematic diagram of originating port template seven, in Fig. 4, respectively cutting carried out to places such as A, B, C, D of mouth template, from A-A, B-B profile can see the angle of die cavity be level upward; The angle that D-D profile shows its die cavity be level down; C-C profile display C-C place is the transition connection portion of the top die cavity at A, B place and the bottom die cavity at D place.The left side of the die cavity sectional view on the right side of Fig. 4 is charging aperture side.
Fig. 5 is the structural representation of connector 30, and this connector is provided with dowel hole 40 and fixing hole 22.The circular setting of charging aperture be connected with extruder on the internal cavity of connector 30 as shown in Figure 1; The other end is that discharging opening is connected with current divider 10, and this discharging opening is consistent with feed end 164 shape of current divider 10.Feed end 164 due to current divider 10 is rectangle like structures, thus the mucosal structure of current divider 10 by circle gradually be transformed into the shape consistent with feed end 164.Can ensure that the plastics of melting enter into branch chamber 16 smoothly like this.In order to can set of molds be loaded accurately and rapidly in die trial and when safeguarding, on all parts, correspondence is provided with alignment pin installing hole.Only by alignment pin, each positioning parts need can be realized accurate location well during installation.And then can make to complete installation fast and accurately between each parts with bolt tension.
Further, in order to prevent the plastic liquid of molten condition from causing plastics frozen plug runner because temperature declines suddenly in runner, the outer surface in the current divider 10 in the present embodiment and mouth mould portion 20 is upper and lower, left and right is also provided with heating plate and heats to ensure that plastic flow is unimpeded to mould.The die head up and down 12 of mould or mouth mould portion 20 also can be provided with further the temperature sensor fixing hole for detecting runner temperature.So operationally can be held the change of mould transient temperature by temperature sensor accurately, thus ensure that the temperature of mould meets plastics and normally extrudes required temperature.
Runner and die cavity carry out combination by many structural members to be formed by connecting in the present embodiment, and this proposes higher requirement to the flatness of each faying face, also had higher requirement to mechanical processing technique simultaneously.In order to realize effective sealing, in these corrupt split faces, usually clamp the seal with same configuration that useful copper coin processes, copper coin preferably adopts red copper material.The compact siro spinning technology between each component is realized by the ductility that red copper is comparatively good.Finally, above-mentioned description is only the description to this embodiment of the present utility model, and the utility model is not limited to the restriction that above-described embodiment describes.In every case according to design of the present utility model, parts, structure are all fallen within protection domain of the present utility model by the innovation and creation of simple conversion or equivalent transformation gained.
Claims (9)
1. a combined type extrusion die, is characterized in that, comprising:
One current divider (10), described current divider (10) is made up of upper die head (12) and lower die head (14), described upper die head (12) is formed with the junction of lower die head (14) branch chamber (16) shunted for molten plastic, spreader (162) is provided with in described branch chamber (16), branch chamber (16) two ends are feed end (164) and discharge end (166), and the region correspondence beyond the branch chamber (16) on upper die head (12) and lower die head (14) is provided with connecting hole (18);
Mouth mould portion (20), described mouth mould portion (20) is provided with die cavity (21), and mouth mould portion (20) is fixedly connected with the discharge end (166) of current divider (10);
A connector (30), the discharging opening of described connector (30) is connected with the feed end (164) of current divider (10); The discharging opening of described connector (30) is corresponding consistent with the shape of the feed end (164) of current divider (10).
2. mould as claimed in claim 1, it is characterized in that: the shape of described spreader (162) is similar isosceles triangle, the drift angle of described spreader (162) is close to described feed end (164), and its base is near described discharge end (166) and be parallel to or be basically parallel to described discharge end (166) edge.
3. mould as claimed in claim 2, peculiar this is: described mouth mould portion (20) is fixedly connected sequentially by least three pieces of mouth templates and forms, at least two pieces of mouth templates wherein near current divider (10) constitute mouthful compression section in mould portion (20), and at least one piece of mouth template away from current divider (10) constitutes mouthful flat segments in mould portion (20); The die cavity angle of the starting block mouth template of the close current divider in described compression section is 20-30 degree, and the described die cavity of starting block mouth template and the discharge end of current divider match; The die cavity angle of the end block mouth template in described compression section is 12-25 degree; Be provided with dividing plate (212) along direction of flow in the die cavity of described compression section, the gap between described adjacent separator (212) is 5-7 times of extruded product thickness; Cavity dimension in described flat segments is the 102%-105% of product size.
4. mould as claimed in claim 3, it is characterized in that: by seven pieces of mouth templates (29,28,27,26,25,24,23), be fixedly connected sequentially forms described mouth mould portion (20), described mouth template seven (29), mouth template six (28), mouth template five (27) form the compression section in mouth mould portion together, and mouth template four (26) is to the flat segments in mouth template one (23) four piece of mouth template composition mouth mould portion; Wherein mouth template seven (29) the starting block mouth template that is compression section being fixed together with the discharge end (166) of described current divider (10), the end block mouth template that mouth template five (27) is compression section is also connected with mouth template four (26).
5. the mould as described in claim 3 or 4, is characterized in that: the starting block mouth template of compression section, described mouth mould portion and the die cavity of end block mouth template there is plano-concave section and be positioned at plano-concave section two ends and with raised section of the smooth connection of plano-concave section; The import department of described raised section is that level upwards designs to export department, and the import department of described plano-concave section is that level designs downwards to export department.
6. mould as claimed in claim 5, is characterized in that: the starting block mouth template of compression section, described mouth mould portion and the die cavity of end block template there is plano-concave section and be positioned at plano-concave section two ends and with raised section of the smooth connection of plano-concave section; The import department of described raised section is that level upwards designs to export department, and the import department of described plano-concave section is that level designs downwards to export department.
7. mould as claimed in claim 6, is characterized in that: the exterior lateral area of the branch chamber (16) of die head is processed with groove up and down.
8. mould as claimed in claim 7, is characterized in that: described mold outer surface is provided with heating plate or the installing hole for installing heating plate.
9. mould as claimed in claim 8, is characterized in that: the upper and lower die head of mould or mouth mould portion are provided with the temperature sensor fixing hole for detecting runner temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520106178.4U CN204526078U (en) | 2015-02-13 | 2015-02-13 | A kind of combined type extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520106178.4U CN204526078U (en) | 2015-02-13 | 2015-02-13 | A kind of combined type extrusion die |
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| Publication Number | Publication Date |
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| CN204526078U true CN204526078U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520106178.4U Expired - Fee Related CN204526078U (en) | 2015-02-13 | 2015-02-13 | A kind of combined type extrusion die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079358A (en) * | 2016-08-23 | 2016-11-09 | 鹤山联塑实业发展有限公司 | A kind of quickly cooled proof sea culture net cage pallet body production mould |
| CN106626314A (en) * | 2017-01-19 | 2017-05-10 | 中山市明氏塑胶制品有限公司 | Compound extrusion die capable of discharging stably |
-
2015
- 2015-02-13 CN CN201520106178.4U patent/CN204526078U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079358A (en) * | 2016-08-23 | 2016-11-09 | 鹤山联塑实业发展有限公司 | A kind of quickly cooled proof sea culture net cage pallet body production mould |
| CN106626314A (en) * | 2017-01-19 | 2017-05-10 | 中山市明氏塑胶制品有限公司 | Compound extrusion die capable of discharging stably |
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