CN209158892U

CN209158892U - A kind of single layer extrusion die

Info

Publication number: CN209158892U
Application number: CN201821675967.XU
Authority: CN
Inventors: 陆雄球
Original assignee: Foshan Shunde Xiongqiu Plastic Machinery Co Ltd
Current assignee: Foshan Shunde Xiongqiu Plastic Machinery Co Ltd
Priority date: 2018-10-16
Filing date: 2018-10-16
Publication date: 2019-07-26
Anticipated expiration: 2028-10-16

Abstract

The utility model discloses a kind of single layer extrusion dies, including die body, mold core, mould mouth and mould bowl, and die body, mold core, it is fixed to each other between mould mouth and mould bowl by bolt, the mould mouth is fixed on above mold core and forms discharging gap between the die body, the mould mouth and mould bowl form discharge port between being coaxially set, feed inlet is equipped in the middle part of the mold core bottom surface, centered on feed inlet it is radial be equipped with feed pipe and with the matched runner mouth of feed pipe, the mold core lateral wall is equipped with using runner mouth as the helical flow path of starting point, the recess of annular is equipped with above the mold core lateral wall, the recess and helical flow path connection, the utility model aim is to provide a kind of structure by improving mold core, so that improving the single layer extrusion die for squeezing out the quality of profile.

Description

A kind of single layer extrusion die

Technical field

The utility model relates to blow moulding machine apparatus field more particularly to a kind of single layer extrusion dies.

Background technique

It by extrusion molding is by heating so that plastics liquefaction by plastics, the then outlet extruding shape Jing Guo specific shape At continuous profile, there are many plastic products type processed by this method, such as tubing, film.Extrusion molding has effect The advantages that rate height, small investment, production are easy, sustainable production, and mechanical device is small, clean environment.

The head of extrusion die is the extrusion molding mould i.e. main component of extrusion die, it has following four kinds of effects: making Material is become moving along a straight line from screw；Necessary briquetting pressure is generated, guarantees that product is closely knit；Obtain material by head Further plasticizing；The product of section configuration required for being formed by head.

Liquid plastic is generally entered directly by runner and is squeezed in gap by traditional extrusion die, due to multiple flow passages Liquid plastic flow velocity is variant, will appear plastics tomography during continuous extruded product or shaped article is in uneven thickness, shadow Product quality is rung, and plastics in extrusion forming are carried out in high temperature, the plasticity of plastics at this time is high, if cooling inadequate, directly The plastics plasticity reduction for flowing into extruding gap is very few, causes the quality of extrudate not ideal enough.

Utility model content

The utility model aim is to provide a kind of structure by improving mold core, so that improving the quality for squeezing out profile Single layer extrusion die.

In order to achieve the above object, the technical solution of the utility model has:

A kind of single layer extrusion die, including die body, mold core, mould mouth and mould bowl, and between die body, mold core, mould mouth and mould bowl It is fixed to each other by bolt, the mould mouth is fixed on above mold core and forms discharging gap, the mould mouth between the die body With mould bowl be coaxially set between form discharge port, feed inlet is equipped in the middle part of the mold core bottom surface, in putting centered on feed inlet Penetrate shape equipped with feed pipe and with the matched runner mouth of feed pipe, the mold core lateral wall be equipped with using runner mouth as starting point Helical flow path, the mold core lateral wall top are equipped with the recess of annular, the recess and helical flow path connection.

A kind of single layer extrusion die of the utility model, the center set-up mode of feed inlet may make liquid plastic to enter mould Core flows to the uniform flow of each runner mouth again, and radial structure ensure that flowing through distance keeps equal；Helical flow path, can To increase the distance that flows through of plastics, the cooling time of plastics is increased from another point of view；And the recess of annular, to the plastics of inflow Buffer area is provided, plastics flow slowly into recess until filling up, since the width in discharging gap is much smaller than the depth of recess, protect Card plastic density uniformly enters discharging gap, while recess is arranged on mold core, and increase plastics flows through distance and in mould The residence time of core or mold core region, increase cooling effect.

Preferably, the helical flow path is around the mold core outer wall is located at, and the depth of helical flow path is with far from the runner Mouthful and be gradually reduced.

Further, the recessed formation cylinder groove in top at the top of the mold core, and be coaxially provided with the cylinder groove positioned at mould The air groove of the inverted cone shape of core inner, the air groove inside are equipped with the venthole of perforation to mold core bottom.

Further, mould gonys portion is stepped narrows and matches with the shape of the cylinder groove, the mould mouth pressure Gap is formed at the top of molding core and in cylinder groove.

Preferably, it is equipped with concave ring at the top of the surrounding edge of the cylinder groove, and annular groove is cooperatively formed by the pressing of mould mouth.

Preferably, the die body upper opening, and the angle being open is greater than the narrowed angle of the mould mouth.

Detailed description of the invention

Fig. 1 is the perspective view of extrusion die；

Fig. 2 is the explosive view of extrusion die；

Fig. 3 is the cross-sectional view of extrusion die；

Fig. 4 is structural schematic diagram at the A of extrusion die.

Specific embodiment

A kind of single layer extrusion die of the utility model is described with reference to the drawings.

As shown in Figures 1 to 4, a kind of single layer extrusion die, including die body 3, mold core 4, mould mouth 2 and mould bowl 1, and die body 3, Be fixed to each other between mold core 4, mould mouth 2 and mould bowl 1 by bolt, the mould mouth 2 be fixed on the top of mold core 4 and with the die body 3 Between form discharging gap 12, the mould mouth 2 and mould bowl 1 be coaxially set between form discharge port 11, in 4 bottom surface of mold core Portion be equipped with feed inlet 6, centered on feed inlet 6 it is radial be equipped with feed pipe 44 and with the matched runner of feed pipe 44 Mouth 431, it is the helical flow path 43 of starting point that 4 lateral wall of mold core, which is equipped with runner mouth 431, above 4 lateral wall of mold core Recess 42 equipped with annular, the recess 42 and 43 connection of helical flow path.

A kind of single layer extrusion die of the utility model, the center set-up mode of feed inlet 6 may make liquid plastic to enter Mold core 4 flows to the uniform flow of each runner mouth 431 again, and radial structure ensure that flowing through distance keeps equal；Spiral Runner 43 can increase the distance that flows through of plastics, increase the cooling time of plastics from another point of view；And the recess 42 of annular, Buffer area is provided to the plastics of inflow, plastics flow slowly into recess 42 until filling up, since the width in discharging gap is far small In the depth of recess 42, guarantee that plastic density uniformly enters discharging gap, while recess 42 is arranged on mold core 4, increases Plastics flow through distance and the residence time in 4 region of mold core 4 or mold core, increase cooling effect.

As shown in figure 3, the helical flow path 43 surround and is located at the mould in order to enable stream is evenly distributed in die internal The depth of 4 outer wall of core, helical flow path 43 is gradually reduced with far from the runner mouth 431, while between mold core 4 and die body 3 Gap can be gradually increased with the rising of helical flow path 43, and in this section, stream will appear radial along helical flow path 43 Flowing and flowed along the axial direction of 3 outer wall of die body, as time increases, the ratio of Radial Flow reduces, axially opposite The ratio of flowing increases, and final whole stream is distributed stream in die internal close along axial flowing Degree uniformly, and flows to unified.

Further, as shown in figure 3, general extrusion die all has cooling device, at the top of the mold core 4 under top Spill is coaxially provided with the cylinder groove 41 air groove 5 of the inverted cone shape inside mold core 4, inverted cone shape at cylinder groove 41 Structural stability relative to other shapes height, since stream is to increase heat transfer area, the sky from 4 side flow of mold core It is equipped with the venthole 51 of perforation to 4 bottom of mold core inside air drain 5, is imported in compressed air to air groove 5 by venthole 51, benefit Heat is absorbed with compressed air to cool down.

Further, as shown in figure 3, fixation in order to guarantee mould mouth 2 Yu mold core 4, the stepped receipts in 2 bottom of mould mouth It is narrow and matched with the shape of the cylinder groove 41, and its mating surface is equipped with multiple screw hole/slots, guarantees that mould mouth 2 and mold core 4 are logical It crosses screw to further fix, the mould mouth 2 presses 4 top of mold core and forms gap in cylinder groove 41, due to flowing into die head Stream temperature is 100 DEG C to 150 DEG C, belongs to high-temperature fusant, according to the principle expanded with heat and contract with cold, reserved margin, guarantee the structure not by Damage.

Preferably, as shown in figure 3 or 4, it is equipped with concave ring at the top of the surrounding edge of the cylinder groove 41, and is matched by the pressing of mould mouth 2 Conjunction forms annular groove 45 and might have when stream flows into the junction of the mould mouth 2 and mold core 4 between discharging gap 12 from recess 42 High temperature feedstock infiltrates into 4 inside of mold core and enters air groove 5, and annular groove 45 stores the raw material of infiltration, due to being inside mold core 4 Cooling device, the part material are condensed into solid in annular groove 45, thoroughly raw material are prevented to penetrate into air groove 5.

Preferably, as shown in figure 3,3 upper opening of the die body, and the angle being open is greater than the narrowed angle of the mould mouth 2 Degree, so that discharging gap 12 is in tip-angled shape, the discharging gap 12 of the setting makes material density distribution more uniform, it is easier to squeeze It forms out, meets quality of production demand.

According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality The mode of applying is changed and is modified.Therefore, the utility model is not limited to specific embodiment disclosed and described above, right Some modifications and changes of the utility model should also be as falling into the protection scope of the claims of the present utility model.In addition, to the greatest extent It is used some specific terms in pipe this specification, these terms are merely for convenience of description, not to the utility model Constitute any restrictions.

Claims

1. a kind of single layer extrusion die, including die body, mold core, mould mouth and mould bowl, and lead between die body, mold core, mould mouth and mould bowl Bolt is crossed to be fixed to each other, the mould mouth is fixed on above mold core and is formed between the die body discharging gap, the mould mouth with Mould bowl forms discharge port between being coaxially set, which is characterized in that

Feed inlet is equipped in the middle part of the mold core bottom surface, it is radial centered on feed inlet to be equipped with feed pipe and and feed pipe Matched runner mouth, the mold core lateral wall is equipped with using runner mouth as the helical flow path of starting point, above the mold core lateral wall Recess equipped with annular, the recess and helical flow path connection.

2. a kind of single layer extrusion die according to claim 1, which is characterized in that the helical flow path is described around being located at The depth of mold core outer wall, helical flow path is gradually reduced with far from the runner mouth.

3. a kind of single layer extrusion die according to claim 1, which is characterized in that recessed formation cylinder at the top of the mold core Slot, and it is coaxially provided with the cylinder groove air groove of the inverted cone shape inside mold core, perforation is equipped with inside the air groove To the venthole of mold core bottom.

4. a kind of single layer extrusion die according to claim 3, which is characterized in that mould gonys portion is stepped to narrow And matched with the shape of the cylinder groove, gap is formed at the top of the mould mouth pressing mold core and in cylinder groove.

5. a kind of single layer extrusion die according to claim 4, which is characterized in that be equipped at the top of the surrounding edge of the cylinder groove Concave ring, and annular groove is cooperatively formed by the pressing of mould mouth.

6. a kind of single layer extrusion die according to claim 1, which is characterized in that the die body upper opening, and be open Angle be greater than the mould mouth narrowed angle.