CN206066902U - A HDPE three-layer co-extrusion die - Google Patents

Abstract

The utility model discloses a HDPE three-layer co-extrusion die, which consists of a large material distributing sleeve, a small material distributing sleeve, a die nozzle, a die outer body, a die bowl and a die core, wherein a first feeding channel is arranged between the large material distributing sleeve and the die outer body, a second feeding channel is arranged between the small material distributing sleeve and the large material distributing sleeve, a third feeding channel is arranged between the die core and the small material distributing sleeve, a film outlet channel is arranged between the die nozzle and the die bowl, the axis of the die nozzle is provided with an air blowing hole, three kinds of film materials respectively enter the die head from the first feeding channel, the second feeding channel and the third feeding channel, then are compounded at the film outlet channel, high-pressure air is blown out from the air blowing hole, the processing of composite packaging films such as LDPE, HDPE, PE, EVA and the like can be realized, the dispersion of dissolved materials of raw materials is more uniform, the material mixing effect is better, the tensile strength of blown film products is better, especially when manufacturing ABA type films, compared with the prior three main machines, the feeding device saves the cost and occupies small area.

Description

A HDPE three-layer co-extrusion die

technical field

The utility model relates to a plastic film blowing machine, in particular to a HDPE three-layer co-extrusion die.

Background technique

Plastic film blowing machines in the prior art generally use a single extrusion device to feed a single die or a composite die, and the blown plastic film is a single layer or a composite layer, but due to the single feeding, the blown film texture is Uneven and easily broken. However, plastic products for different purposes have different requirements on their strength, thickness and toughness; in addition, when producing plastic films with good strength, thin thickness and good toughness, high-quality and high-cost raw materials must be used.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a HDPE three-layer co-extrusion die with simple structure and capable of blowing out three-layer films to form one layer.

The technical scheme that the utility model solves its technical problem adopts is:

A HDPE three-layer co-extrusion die is composed of a large material distribution sleeve, a small material distribution sleeve, a die nozzle, an outer body, a mold bowl and a mold core, the lower end of the mold core is provided with a base, the small material distribution sleeve, The large parting sleeve and the outer mold body are sequentially set outside the mold core and fixed on the base from the inside to the outside, and the mold nozzle is inserted from the upper end of the mold core and partially protrudes from the mold core. Outside the core, the mold bowl is installed on the outer body and sleeved on the die mouth; the mold core is provided with a first feed port, a second feed port and a third feed port, A first feed channel communicating with the first feed port is provided between the large distribution sleeve and the outer mold body, and a feed channel connected to the small distribution sleeve is provided between the small distribution sleeve and the large distribution sleeve. The second feed channel communicated with the second feed port, the third feed channel communicated with the third feed port is set between the mold core and the small distribution sleeve; A continuous film outlet channel is arranged between the mold bowls, and the first feed channel, the second feed channel and the third feed channel are all communicated with the film outlet channel; A blowing hole is arranged on the axis, and an air inlet communicating with the blowing hole is arranged on the mold core.

The base is provided with first bolts, and the out-of-mold body is screwed on the base through the first bolts.

The base is provided with a second bolt, and the large material sleeve is threadedly connected to the base through the second bolt.

The base is provided with a third bolt, and the small distribution sleeve is threadedly connected to the base through the third bolt.

The top of the mold bowl is provided with a fourth bolt axially penetrating through the side wall of the mold bowl, and the mold bowl is threadedly connected to the outer mold body through the fourth bolt.

A fifth bolt is provided through the side wall of the mold bowl, and an adjustment ring extending into the mold bowl is provided on the top of the outer mold body, and the front end of the fifth bolt abuts against the adjustment ring.

The outer wall of the large material distribution sleeve is provided with a first threaded groove whose inlet end communicates with the first feeding port, and the groove width of the first threaded groove gradually decreases from the inlet end to the outlet end.

The outer wall of the small distribution sleeve is provided with a second threaded groove whose inlet end communicates with the second feeding port, and the groove width of the second threaded groove gradually decreases from the inlet end to the outlet end.

The outer wall of the mold core is provided with a third thread groove whose inlet end communicates with the third feed port, and the groove width of the third thread groove gradually decreases from the inlet end to the outlet end.

The beneficial effects of the utility model are: three different film materials enter the die head from the first feeding channel, the second feeding channel and the third feeding channel respectively, and then compound at the film outlet channel, and the high pressure blown out by the blowing hole The gas is blown out from the axis of the film outlet channel to produce a plastic film compounded with three film materials, which can realize the processing of various LDPE, HDPE, PE, EVA and other composite packaging films, which is conducive to high-speed compounding and multi-color overprinting , not only the composite effect is good, but also the cost brought by the use of a single high-quality film material can be saved, the dispersion of the raw material is more uniform, the mixing effect is better, and the tensile strength of the blown film product is better.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is one of overall structural representation of the utility model;

Fig. 2 is the second overall structure schematic diagram of the utility model;

Fig. 3 is a schematic sectional view of the utility model;

Fig. 4 is a schematic exploded view of the structure of the utility model.

detailed description

Referring to Figures 1 to 4, a HDPE three-layer co-extrusion die is composed of a large material sleeve 1, a small material sleeve 2, a die nozzle 3, an external body 4, a mold bowl 5, and a mold core 6. The mold core The lower end of 6 is provided with a base 25, and the small distribution sleeve 2, the large distribution sleeve 1 and the outer mold body 4 are sequentially set outside the mold core 6 and fixed on the base 25 from the inside to the outside. The mold mouth 3 is inserted from the upper end of the mold core 6 and partly protrudes outside the mold core 6, and the mold bowl 5 is installed on the outer mold body 4 and sleeved on the mold mouth 3 ; The mold core 6 is provided with a first feed port 7, a second feed port 8 and a third feed port 9, and the large part material cover 1 and the outer body 4 are provided with the The first feed channel 10 communicated with the first feed port 7, and the second feed channel 11 communicated with the second feed port 8 is arranged between the small distribution cover 2 and the large distribution cover 1 , a third feed channel 12 communicating with the third feed port 9 is set between the mold core 6 and the small distribution sleeve 2; between the die mouth 3 and the die bowl 5 There is a continuous film outlet channel 13, and the first feed channel 10, the second feed channel 11 and the third feed channel 12 are all communicated with the film outlet channel 13; The axis is provided with blowing holes 14, and the mold core 6 is provided with an air inlet 15 communicating with the blowing holes 14, and three kinds of different film materials are fed from the first feeding port 7, the second feeding port 8 and the The third feed port 9 enters the die head, and then composites at the film outlet channel 13, and the high-pressure gas blown out from the blowing hole 14 is blown out from the axis of the film outlet channel 13, so that a plastic film compounded with three film materials can be produced. It can realize the processing of various LDPE, HDPE, PE, EVA and other composite packaging films, which is conducive to high-speed composite and multi-color overprinting. It not only has a good composite effect, but also can save the cost of using a single high-quality film material. Dispersion of the dissolved material is more uniform, the mixing effect is better, and the tensile strength of the blown film product is better. Especially when making ABA film, only two hosts are needed to feed the material, compared with the original three hosts. It saves cost and occupies a small area.

In order to facilitate the assembly and maintenance of the die head, each component of the die head except the die mouth adopts a bolt-locked connection mode, the base 25 is provided with a first bolt 16, and the outer body 4 passes through the first The bolt 16 is threaded on the base 25; the base 25 is provided with a second bolt 17, and the large material sleeve 1 is threaded on the base 25 by the second bolt 17; the base 25 is provided with The third bolt 18, the small distribution sleeve 2 is threaded on the base 25 by the third bolt 18; Four bolts 19, the mold bowl 5 is threadedly connected to the outer mold body 4 through the fourth bolt 19, the structure is simple, and the assembly and disassembly are convenient.

In this embodiment, the base 25 is in the shape of a step shrinking upwards, and the outer body 4, the large distribution sleeve 1 and the small distribution sleeve 2 are respectively located at the top of the three-layer step from bottom to top, The axis of the base 25 is provided with a three-layer stepped material inlet 26 that shrinks inwardly and upwardly, and the first material inlet 7, the second material inlet 8 and the third material inlet 9 are located at the In the mouth 26 and respectively located on the inner wall of the three-layer step from bottom to top, the structure is simple.

The side wall of the mold bowl 5 is provided with a fifth bolt 20, the top of the outer mold body 4 is provided with an adjusting ring 21 extending into the mold bowl 5, and the front end of the fifth bolt 20 is against the mold bowl 5. On the adjusting ring 21, by adjusting the tightness of the fifth bolt 20 against the adjusting ring 21, the width of the film outlet channel 13 can be adjusted, and then the thickness of the film outlet can be adjusted. The structure is simple.

The outer wall of the large distribution sleeve 1 is provided with a first threaded groove 22 whose inlet end communicates with the first feed port 7, and the groove width of the first threaded groove 22 gradually decreases from the inlet end to the outlet end. Small setting; the outer wall of the small distribution sleeve 2 is provided with a second threaded groove 23 whose inlet end communicates with the second feed port 8, and the groove width of the second threaded groove 23 is from the inlet end to the outlet The end is gradually reduced; the outer wall of the core 6 is provided with a third threaded groove 24 whose inlet end communicates with the third feed port 9, and the groove width of the third threaded groove 24 is determined by its inlet end. It is gradually reduced to the outlet end, and the above-mentioned structure can improve the uniformity of each layer of membrane materials when they meet.

Claims (9)

1. a kind of HDPE Three-layer co-extrusion molds, it is characterised in that it is by big sub-material set（1）, little sub-material set（2）, mould mouth（3）, outside mould Body（4）, mould bowl（5）And core rod（6）Constitute, the core rod（6）Lower end be provided with base（25）, the little sub-material set（2）、 The big sub-material set（1）With the mould ectosome（4）It is sleeved on the core rod from inside to outside successively（6）It is outer and be fixed on the base （25）On, the mould mouth（3）From the core rod（6）Upper end insertion and partly stretch out in the core rod（6）Outward, the mould bowl （5）Installed in the mould ectosome（4）Go up and be socketed on the mould mouth（3）On；

The big sub-material set（1）With the mould ectosome（4）Between be provided with entrance positioned at the base（25）On first charging Road（10）, the little sub-material set（2）With the big sub-material set（1）Between be provided with entrance positioned at the base（25）On second Feed channel（11）, the core rod（6）With the little sub-material set（2）Between be provided with entrance positioned at the base（25）On the 3rd Feed channel（12）, the mould mouth（3）With the mould bowl（5）Between be provided with（13）, first charging Road（10）, second feed channel（11）With the 3rd feed channel（12）Outlet with it is described go out membrane channels（13）Connection；

The mould mouth（3）Axle center be provided with gas hole（14）, the core rod（6）It is provided with and the gas hole（14）Connection Air intake duct（15）.

2. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the base（25）It is provided with the first spiral shell Bolt（16）, the mould ectosome（4）By first bolt（16）It is threaded in the base（25）On.

3. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the base（25）It is provided with the second spiral shell Bolt（17）, the big sub-material set（1）By second bolt（17）It is threaded in the base（25）On.

4. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the base（25）It is provided with the 3rd spiral shell Bolt（18）, the little sub-material set（2）By the 3rd bolt（18）It is threaded in the base（25）On.

5. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the mould bowl（5）Top be provided with axle To through the mould bowl（5）4th bolt of side wall（19）, the mould bowl（5）By the 4th bolt（19）Threaded connection In the mould ectosome（4）On.

6. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the mould bowl（5）Side wall through arrange There is the 5th bolt（20）, the mould ectosome（4）Top be provided with and stretch into the mould bowl（5）Interior regulation ring（21）, described Five bolts（20）Front end be against the regulation ring（21）On.

7. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the big sub-material set（1）Outer wall on set Entrance point is equipped with positioned at first feed channel（10）Porch, the port of export be located at first feed channel（10）Exit The first thread groove（22）, first thread groove（22）Groove width by its entrance point to the port of export in being gradually reduced setting.

8. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the little sub-material set（2）Outer wall on set Entrance point is equipped with positioned at second feed channel（11）Porch, the port of export be located at second feed channel（11）Exit The second thread groove（23）, second thread groove（23）Groove width by its entrance point to the port of export in being gradually reduced setting.

9. HDPE Three-layer co-extrusion molds according to claim 1, it is characterised in that the core rod（6）Outer wall on be provided with Entrance point is located at the 3rd feed channel（12）Porch, the port of export be located at the 3rd feed channel（12）Exit Three thread grooves（24）, the 3rd thread groove（24）Groove width by its entrance point to the port of export in being gradually reduced setting.