阅读说明：本技术 一种新型磨盘式机头 (Novel millstone type machine head ) 是由 燕峻杰 燕林建 于 2018-06-21 设计创作，主要内容包括：本发明公开了一种新型磨盘式机头,包括本体、口模、调整环及加热设备,其中所述本体上设有进料口和通气孔,所述口模设置于所述本体上方并与所述本体固定连接,所述调整环套设于所述口模外,且与所述口模之间设有间隙,该间隙通过流道与所述进料口连通,所述本体、口模及调整环构成磨盘式结构。这种新型磨盘式机头,体型较小,流道较短,降低加温的能源消耗,提高生产效率,从而达到高效节能的目的。(The invention discloses a novel millstone type machine head which comprises a body, a neck mold, an adjusting ring and heating equipment, wherein the body is provided with a feed inlet and a vent hole, the neck mold is arranged above the body and is fixedly connected with the body, the adjusting ring is sleeved outside the neck mold, a gap is arranged between the adjusting ring and the neck mold, the gap is communicated with the feed inlet through a flow passage, and the body, the neck mold and the adjusting ring form a millstone type structure. The novel millstone type machine head is small in size and short in flow channel, reduces heating energy consumption, improves production efficiency, and achieves the purpose of high efficiency and energy conservation.)

1. The utility model provides a novel mill formula aircraft nose which characterized in that: the heating device comprises a body, a mouth mold, an adjusting ring and heating equipment, wherein a feeding hole and an air vent are formed in the body, the mouth mold is arranged above the body and fixedly connected with the body, the adjusting ring is sleeved outside the mouth mold and provided with a gap between the adjusting ring and the mouth mold, the gap is communicated with the feeding hole through a flow channel, and the body, the mouth mold and the adjusting ring form a millstone type structure.

2. The new burr head of claim 1, wherein: the body is provided with a boss.

3. The new burr head of claim 1, wherein: the adjusting ring is provided with a plurality of adjusting bolts, and the adjusting bolts penetrate through the adjusting ring and are abutted to the body.

4. The new burr head of claim 1, wherein: and reinforcing ribs are arranged on the inner wall of the adjusting ring.

5. The new burr head of claim 1, wherein: the number of the vent holes is 4-6.

6. The new burr head of claim 3, wherein: the number of the adjusting bolts is 6-10.

7. The new burr head of claim 1, wherein: the flow channels are radial channels which are positioned in the same horizontal plane and have equal included angles.

8. The new burr head of claim 1, wherein: the heating equipment is a resistance element or a heating oil pipe.

Technical Field

The invention relates to the technical field of blown film forming, in particular to a novel millstone type machine head.

Background

The plastic film is a plastic product widely used at present, and the production mode mainly adopts blow molding. The blow molding film is formed by extruding plastic into a ring-shaped film tube with uniform thickness through a machine head, and blowing a proper amount of compressed air into the film tube from the lower part of the machine head to expand the film tube so as to obtain the tubular film. Due to the strong market demand for functional films and the like and the development of coextrusion technology, in recent years, blown film forming is rapidly developed, and higher demand is also generated for film heads.

Disclosure of Invention

The invention aims to provide a novel millstone type machine head which is small in size, simple in structure, low in energy consumption and high in production efficiency, so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a novel millstone type machine head which comprises a body, a neck mold, an adjusting ring and heating equipment, wherein the body is provided with a feed inlet and a vent hole, the neck mold is arranged above the body and is fixedly connected with the body, the adjusting ring is sleeved outside the neck mold, a gap is arranged between the adjusting ring and the neck mold, the gap is communicated with the feed inlet through a flow passage, and the body, the neck mold and the adjusting ring form a millstone type structure.

Preferably, the body is provided with a boss.

Preferably, a plurality of adjusting bolts are arranged on the adjusting ring and penetrate through the adjusting ring to be propped against the body.

Preferably, a reinforcing rib is arranged on the inner wall of the adjusting ring.

Preferably, the number of the vent holes is 4-6.

Preferably, the number of the adjusting bolts is 6-10.

Preferably, the flow passages are radial passages which are located on the same horizontal plane and have equal included angles.

Preferably, the heating device is a resistive element or a heated oil tube.

Compared with the prior art, the invention has the following beneficial technical effects:

the novel grinding disc type machine head provided by the invention adopts a grinding disc type structure, only comprises the body, the mouth mold and the adjusting ring, optimizes the whole structure of the machine head compared with the existing film machine head, reduces the complexity of the structure of the machine head, has good assembly manufacturability, is convenient to maintain, has small size, uses less materials for manufacturing the machine head, has short heating time and low heat loss, and saves material cost and energy. Meanwhile, the runner of the millstone type machine head is short, the pressure on the plastic melt in the runner is small, the film discharging efficiency is high, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a top view of the novel burr head of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of the novel burr head of the present invention;

fig. 3 is a schematic view of the radial flow path of the novel burr head of the present invention.

In the figure: 1 neck mold, 2 adjusting rings, 3 main body, 4 adjusting bolts, 5 reinforcing ribs, 6 vent holes and 7 feed inlets.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a novel millstone type machine head with small size, low energy consumption and high production efficiency, which solves the problems of complex structure, large size, more material consumption, long heating time, large energy consumption, uneven heating temperature and difficult adjustment of the uniformity of a finished film in the prior art.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The embodiment provides a novel millstone type machine head, as shown in fig. 1-3, comprising a body 3 and a neck mold 1, wherein the body 3 is a cylinder and is provided with a boss, and the neck mold 1 is coaxially arranged above the boss and is fixedly connected with the boss. The lower part of the body 3 is provided with a feed inlet 7 which is connected with a discharge hole of the extruder. Meanwhile, the body 3 is provided with a step surface, the adjusting ring 2 is sleeved outside the neck mold 1, and a matching surface is arranged to be tightly attached to the step surface of the body 3. Be equipped with the clearance between adjustable ring 2 and bush 1, the boss, set up adjusting bolt 4 and run through adjustable ring 2 and push up on body 3, its figure is 8, is used for adjusting the size in clearance, and then adjusts the thickness and the degree of consistency of film. Radial runners are arranged in the circumferential direction of the boss by taking a certain point on the central axis of the boss as a center, the number of the runners is 16, all the runners are positioned on the same horizontal plane, and included angles among the runners are equal. The runner communicates the gap with the feed inlet 7, and the plastic melt entering the runner enters the gap after being evenly divided, so that the pressure is balanced in the gap. The body 3 is also provided with a vent hole 6 which can be filled with compressed air.

Further, an inclined surface is arranged below the outer edge of the neck ring die 1, and a gap between the inclined surface and the adjusting ring 2 is gradually reduced in the extrusion direction. The plastic melt enters the gap after being shunted by the runner, the pressure of the plastic melt in the gap is uniformly distributed under the balance action of the gap, the pressure applied to the plastic melt is gradually increased along with the gradual reduction of the gap, and finally the film tube is extruded through the gap of the die orifice, so that the extruded annular film tube has uniform tissue.

Furthermore, a reinforcing rib 5 is arranged between the neck ring die 1 and the adjusting ring 2. The reinforcement 5 here serves, in addition to supporting reinforcement, to assist the adjusting bolts 4 in adjusting the gap between the die 1 and the adjusting ring 2. When one adjusting bolt 4 is adjusted, the reinforcing rib 5 is indirectly subjected to the acting force transmitted by the adjusting ring 2, so that the size of the gap at the position is slightly and uniformly changed, and the size of the die gap is more uniformly adjusted.

Further, the heating device can adopt a resistance element and can also adopt a heating oil pipe. The heating device may be arranged outside the adjusting ring 2 or inside the adjusting ring 2 and the body 3.

And starting heating equipment to preheat the machine head, and conveying the plastic melt into a machine head feed inlet 7 from a discharge port of the extruder and then into the radial flow channel. The plastic melt is uniformly distributed through the radial runners, then enters the gap, the pressure of the plastic melt is balanced in the gap, then the pressure is gradually increased along with the gradual reduction of the gap, and finally the film tube is extruded through the die gap. The thickness and uniformity of the film tube can be adjusted by adjusting the size of the die gap through the adjusting bolt 4. And introducing a proper amount of compressed air from the vent holes 6 to expand the annular membrane tube, and then cooling and shaping to obtain the membrane.

The grinding disc type structure adopted by the invention only comprises the body, the mouth mold and the adjusting ring, the integral structure of the machine head is optimized, the complexity of the structure of the machine head is reduced, the assembly manufacturability is good, the maintenance is convenient, the size is small, the material consumption for manufacturing the machine head is small, the heating time is short, the heat loss is low, and the material cost and the energy are saved. Meanwhile, the runner of the millstone type machine head is short, the pressure on the plastic melt in the runner is small, the film discharging efficiency is high, and the production efficiency is improved.

The flow passage may have various other forms. In the prior art, in order to equalize the pressure inside a machine head, a longer flow channel is usually arranged, the flow channels adopted in the invention are radial structures which are positioned on the same horizontal plane and have equal included angles among the flow channels, the flow channel flow is short, the pressure of a plastic melt is reduced through uniform flow distribution, then the plastic melt enters a gap, then the pressure of the plastic melt is small and uniform through the equalizing action of the gap, and then the plastic melt enters a die gap after being extruded by an inclined plane, so that an annular membrane tube with uniform tissues is extruded.

It should be noted again that, in this embodiment, the number of the adjusting bolts 4 is set to 8, or may be 6 or 10, and on the premise that the production requirement is met, the more the number of the adjusting bolts 4 is, the more accurate the adjustment of the die gap is. Similarly, the number of flow channels may be 14, 18, or other numbers; the number of ventilation holes 6 may also be 6, 8 or another number.

The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.