CN209158893U - A kind of bilayer extrusion die - Google Patents

A kind of bilayer extrusion die Download PDF

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Publication number
CN209158893U
CN209158893U CN201821675972.0U CN201821675972U CN209158893U CN 209158893 U CN209158893 U CN 209158893U CN 201821675972 U CN201821675972 U CN 201821675972U CN 209158893 U CN209158893 U CN 209158893U
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China
Prior art keywords
mold core
double
mould mouth
extrusion die
mouth
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CN201821675972.0U
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Chinese (zh)
Inventor
陆雄球
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Foshan Shunde Xiongqiu Plastic Machinery Co Ltd
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Foshan Shunde Xiongqiu Plastic Machinery Co Ltd
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Priority to CN201821675972.0U priority Critical patent/CN209158893U/en
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Abstract

The utility model discloses a kind of double-deck extrusion dies, including die body, mould mouth, die cap and mold core, and die body, mould mouth, it is fixed to each other between die cap and mold core by bolt, the mould mouth is fixed on above mold core and forms tapping channel between die body and mold core, composite discharge mouth is formed between the mould mouth and die cap, diversion sleeve is socketed with around the mold core, the diversion sleeve is located in tapping channel, and the tapping channel is separated into two discharging runners, the discharging width of flow path becomes smaller with the increase of its depth, the utility model aim is to provide a kind of double-deck extrusion die, so that stream can be shunted, it is squeezed out from two channels, make film thickness uniform ground simultaneously, improve product quality.

Description

A kind of bilayer extrusion die
Technical field
The utility model relates to blow moulding machine fields, more particularly to the double-deck extrusion die.
Background technique
Blow molding is also referred to as hollow blow molding, a kind of plastic working method quickly grown, and thermoplastic resin is squeezed out or is injected into The tubular plastic parison that type obtains is placed in split cavity while hot (or being heated to soft state), is led in parison immediately after die closing Enter compressed air, make plastic parison inflation and be tightly attached on mould inner wall, arrives various hollow products through cooling and demolding.
The film of single layer structure can only be handled in existing extrusion die, die head its components during the work time it is opposite Position is fixed, therefore is mainly influenced by mold shape and temperature in the process of extrusion film, causes to produce thin Film is uneven, and translucency disunity.
Utility model content
The utility model aim is to provide a kind of double-deck extrusion die and squeezes out so that can shunt stream from two channels, Make film thickness uniform ground simultaneously, improves product quality.
In order to achieve the above object, the technical solution of the utility model has:
A kind of bilayer extrusion die, including die body, mould mouth, die cap and mold core, and between die body, mould mouth, die cap and mold core It is fixed to each other by bolt, the mould mouth is fixed on above mold core and forms tapping channel, the mould between die body and mold core Composite discharge mouth is formed between mouth and die cap, is socketed with diversion sleeve around the mold core, the diversion sleeve is located in tapping channel, And the tapping channel is separated into two discharging runners, the discharging width of flow path becomes smaller with the increase of its depth.
A kind of double-layer coextrusion die head of the utility model is arranged diversion sleeve in tapping channel, forms two discharging runners, expect Stream gradually fills up tapping channel after entering tapping channel, so that a tapping channel is because input stream has flow velocity, it is another Item is static, so that the stream for being located at stagnant zone enters composite discharge mouth with the stream of flowing, since stream flow velocity is slow and companion It is acted on the delay of static stream, so that stream is evenly distributed in tapping channel, sufficiently, density is high for stream mixing, improves The quality of product;The discharging width of flow path becomes smaller with the increase of its depth, after running for a period of time, so that stream is going out It is uniformly radially flowed in stream road, eddy flow will not be generated in discharging runner due to gating location influences and influence product Quality.
Further, it is in triangular shape that anchor ring center is tilted to two sides at the top of the diversion sleeve, and its top is against described multiple Close discharge port.
Further, it is equipped with gap on the upside of the mold core outer wall and diversion sleeve outer wall, so that two runners that discharge Cross sectional shape is consistent.
Further, the mold core includes pedestal and diversion column, and the base center is equipped with feed inlet, with feed inlet is The heart has been arranged radially feed pipe, and feed inlet is connected to by feed pipe with tapping channel.
Further, the spiral that by bottom spiral and depth gradually becomes shallower as is equipped on the diversion sleeve and diversion column Runner 45.
Further, the mould mouth axial location is equipped with inlet channel, is equipped with air groove, the air inlet inside the mold core Channel is connected to air groove.
Further, it protrudes outward to form waist in the middle part of the mould mouth, bends simultaneously shape to mould mouth middle part using waist as starting point At step, the mold core is equipped with the joint portion cooperated with the step, forms annular gap between the joint portion and step.
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 sectional view of extrusion die;
Fig. 4 is structure chart at the A of Fig. 3.
Specific embodiment
A kind of double-layer coextrusion pressing die head of the utility model is described with reference to the drawings.
As shown in Figures 1 to 4, a kind of double-deck extrusion die, including die body 5, mould mouth 2, die cap 1 and mold core 4, and die body 5, mould Be fixed to each other between mouth 2, die cap 1 and mold core 4 by bolt, the mould mouth 2 be fixed on the top of mold core 4 and with die body 5 and mold core 4 Between form tapping channel 31, form composite discharge mouth 24 between the mould mouth 2 and die cap 1, be socketed with point around the mold core 4 Stream set 3, the diversion sleeve 3 is located in tapping channel 31, and the tapping channel 31 is separated into two discharging runners 32, described Discharging 32 width of runner becomes smaller with the increase of its depth.
A kind of double-layer coextrusion die head of the utility model is arranged diversion sleeve 3 in tapping channel 31, forms two discharging runners 32, stream gradually fills up tapping channel 31 after entering tapping channel 31, so that a tapping channel 31 is because of input stream tool There is flow velocity, another static, so that the stream for being located at stagnant zone enters composite discharge mouth 24 with the stream of flowing, due to stream Flow velocity slowly and with the delay of static stream acts on, so that stream is evenly distributed in tapping channel 31, stream mixing is abundant, Density is high, improves the quality of product;Discharging 32 width of runner becomes smaller with the increase of its depth, in operation a period of time It afterwards, will not be due to gating location influences in discharging runner 32 so that stream uniformly radially flows in discharging runner 32 Interior generation eddy flow and influence product quality.
It further, will be described point as shown in figure 3, being mixed into composite discharge mouth 24 to converge stream on one point 3 top anchor ring centers of stream set are obliquely installed to two sides in triangular shape, and its top abuts the composite discharge mouth 24.
Further, as shown in figure 3, being equipped with gap 33 on the upside of 3 outer wall of 4 outer wall of the mold core and diversion sleeve, so that The cross sectional shape of two discharging runners 32 is consistent, and gap 33 ensure that stream when flowing through discharging runner 32, gives stream buffering, It is too fast to place stream climbing speed, and the setting of gap 33 broadens discharging 32 width of runner, and air may be contained in stream Bubble can will flow into the stream moment even uniform at this at gap 33, and air entrapment steeps, so that product quality is smooth and complete Entirely.
Further, as shown in Figure 2 to Figure 3, the mold core 4 includes pedestal 43 and diversion column 41,43 center of pedestal Equipped with feed inlet, feed pipe 42 is arranged radially centered on feed inlet, feed inlet passes through feed pipe 42 and discharging Channel 31 is connected to, and radial feed pipe 42 ensure that stream enters the efficiency of discharging runner 32, improves production efficiency.
Further, as shown in Fig. 2, in order to enable stream is evenly distributed in die internal, the diversion sleeve 3 and diversion column It is equipped with the helical flow path 45 that by bottom spiral and depth gradually becomes shallower as on 41, makes the gap meeting between mold core 4 and die body 5 It is gradually increased with the rising of helical flow path 45, in this section, stream will appear the flowing radial along helical flow path 45 It is flowed with along the axial direction of 5 outer wall of die body, as time increases, the ratio of Radial Flow reduces, axially opposite flowing Ratio increases, and final whole stream makes stream uniform in die internal distribution density in this way along axial flowing, And flow direction is unified.
Further, as shown in figures 2 and 3,2 axial location of mould mouth is equipped with inlet channel 21, sets inside the mold core 4 Have air groove 44, the inlet channel 21 is connected to air groove 44, injecting compressed air in air groove 44, by compressed air into Row heat exchange cools down die head.
Further, as shown in figure 3 or 4, in order to prevent stream in flow process due to all parts connection between have The material leakage that gap generates is that starting point is curved to 2 middle part of mould mouth with waist 25 because protruding outward to form waist 25 in the middle part of the mould mouth 2 Step 23 is rolled over and is formed, the mold core 4 is equipped with the joint portion cooperated with the step 23, shape between the joint portion and step 23 Gap 231 is circularized, the material leakage of generation is trapped in cool down in annular gap 231 expires up to filling annular gap 231, due to Stream sheet, can be with mold core 4 and mould mouth 2 is seamless is bonded as fluid, and solidifying partition stream completely prevents stream from leaking outside.
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 (7)

1. a kind of bilayer extrusion die, including die body, mould mouth, die cap and mold core, and lead between die body, mould mouth, die cap and mold core It crosses bolt to be fixed to each other, the mould mouth is fixed on above mold core and forms tapping channel, the mould mouth between die body and mold core Composite discharge mouth is formed between die cap, which is characterized in that
It is socketed with diversion sleeve around the mold core, the diversion sleeve is located in tapping channel, and the tapping channel is separated into Two discharging runners, the discharging width of flow path become smaller with the increase of its depth.
2. a kind of double-deck extrusion die according to claim 1, which is characterized in that at the top of the diversion sleeve anchor ring center to Two sides inclination is in triangular shape, and its top abuts the composite discharge mouth.
3. a kind of double-deck extrusion die according to claim 1, which is characterized in that the mold core outer wall and diversion sleeve outer wall Upside be equipped with gap so that two discharging runners cross sectional shape it is consistent.
4. a kind of double-deck extrusion die according to claim 3, which is characterized in that the mold core includes pedestal and water conservancy diversion Column, the base center are equipped with feed inlet, feed pipe have been arranged radially centered on feed inlet, feed inlet passes through charging Pipeline is connected to tapping channel.
5. a kind of double-deck extrusion die according to claim 4, which is characterized in that be all provided on the diversion sleeve and diversion column There is the helical flow path that by bottom spiral and depth gradually becomes shallower as.
6. a kind of double-deck extrusion die according to claim 1, which is characterized in that the mould mouth axial location is equipped with air inlet Channel, the mold core inside are equipped with air groove, and the inlet channel is connected to air groove.
7. a kind of double-deck extrusion die according to claim 6, which is characterized in that protrude outward to be formed in the middle part of the mould mouth Waist to bending in the middle part of mould mouth and forms step by starting point of waist, and the mold core is equipped with the joint portion cooperated with the step, Annular gap is formed between the joint portion and step.
CN201821675972.0U 2018-10-16 2018-10-16 A kind of bilayer extrusion die Active CN209158893U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821675972.0U CN209158893U (en) 2018-10-16 2018-10-16 A kind of bilayer extrusion die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821675972.0U CN209158893U (en) 2018-10-16 2018-10-16 A kind of bilayer extrusion die

Publications (1)

Publication Number Publication Date
CN209158893U true CN209158893U (en) 2019-07-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590855A (en) * 2020-06-13 2020-08-28 常州海菲尔机械有限公司 Full-biodegradable 5-layer separation mold
CN112590168A (en) * 2020-12-22 2021-04-02 青岛新大成塑料机械有限公司 Multilayer drip irrigation pipe co-extrusion composite extrusion equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590855A (en) * 2020-06-13 2020-08-28 常州海菲尔机械有限公司 Full-biodegradable 5-layer separation mold
CN112590168A (en) * 2020-12-22 2021-04-02 青岛新大成塑料机械有限公司 Multilayer drip irrigation pipe co-extrusion composite extrusion equipment

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