Splash-proof extruder head

Abstract

The utility model relates to an extruder head, in particular to a splash-proof extruder head. Comprising a machine head body, the machine head body is hollow and provided with a core rod, the outer wall of the core rod is close to the inner wall of the machine head body, and a cavity capable of containing a drip irrigation tape inner diameter rod is formed in the core rod; the upper portion of the core rod is closed inwards and protrudes out of the top end of the machine head body, a die is arranged in the circumferential direction of the outer side of the upper portion of the core rod, and the lower portion of the die is connected with the top of the machine head body and fixed through a limiting ring arranged at the top end of the machine head body. A material channel is formed between the inner wall of the mouth mold and the upper part of the core rod; a spiral groove is formed in the outer wall of the lower part of the mandrel; a feeding hole is further formed in the machine head main body, penetrates through the machine head main body and is communicated with the spiral groove; materials enter the machine head from the feeding hole, flow along the spiral groove in the core rod and are output through the material channel. The machine head has the advantages that the protruding mouth mold structure prevents the machine head body from making contact with water flow, and the machine head is prevented from being splashed and wetted.

Description

Technical Field

[0001] The utility model belongs to the field of extruder equipment, and particularly relates to an extruder head for preventing splashing and wetting. Background Art

[0002] In the prior art, most drip irrigation tapes are made of plastics. The heated plastic particles are extruded into thin-walled plastic pipes by an extruder, and then water-cooled and shaped.

[0003] During the production process of drip irrigation tapes, in order to ensure that the heated molten particles are shaped immediately after being extruded into thin-walled plastic pipes, the discharge pipe connected to the extruder head is often extended into a water-cooling tank. At this time, the extruder head is adjacent to the water-cooling tank, and a spraying device and a guiding groove are arranged at the inlet of the water-cooling tank. The water-cooling tank starts spraying water-cooling at the part where the discharge pipe enters. The discharge of the extruder discharge pipe is cooled by spraying, and part of the water flow is limited in the water-cooling tank and part is led out of the water-cooling tank through the guiding groove. However, the extruder head is adjacent to the water-cooling tank, which causes the problem that the led-out water flow is likely to splash and wet the extruder head; the temperature of the molten particles is very high, and the splashed and wetted extruder head has uneven temperature due to the water flow, which affects the stability of the materials in the extruder; moreover, the head is in a splashed and wetted state for a long time, which affects the service life of the head.

[0004] How to provide an extruder head for preventing splashing and wetting is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems in the above background art, and provides an extruder head for preventing splashing and wetting.

[0006] The technical solution of the utility model is: an extruder head for preventing splashing and wetting, including a head main body; the inside of the head main body is hollow, and a mandrel is arranged inside the head main body. The outer wall of the mandrel is close to the inner wall of the head main body. A cavity for accommodating the inner diameter rod of the drip irrigation tape is arranged inside the mandrel; the upper part of the mandrel has a structure with an inwardly converging mouth and protrudes from the top end of the head main body. A die is wrapped around the outer circumference of the upper part of the mandrel. The lower part of the die is connected to the top of the head main body and fixed by a limiting ring arranged at the top end of the head main body; the upper part of the die protrudes from the top end of the head main body and the limiting ring. A material channel is formed between the inner wall of the die and the upper part of the mandrel; a spiral groove is arranged on the outer wall of the lower part of the mandrel; a feed hole is also arranged on the head main body. The feed hole penetrates through the head main body and is communicated with the spiral groove; the material enters the inside of the head from the feed hole, flows along the spiral groove on the mandrel and is output through the material channel.

[0007] Furthermore, an annular groove is arranged at the top end of the head main body. The lower part of the die protrudes from the upper part. The lower part of the die is connected to the head main body by being embedded in the annular groove.

[0008] Further, the limiting ring covers the lower part of the die and the top end of the head body. A number of screw holes are distributed on the limiting ring, and a number of fixing bolts are respectively fixed on the head body after passing through the fixing screw holes.

[0009] Further, an adjusting ring is provided on the outer side of the upper part of the die. The adjusting ring is arranged on the part where the die protrudes from the limiting ring. The size of the adjusting ring can be adjusted, and the thickness of the drip irrigation tape can be controlled by adjusting the size of the adjusting ring.

[0010] Further, the size of the spiral groove gradually becomes smaller from the feeding direction to the discharging direction.

[0011] Further, a plurality of adjusting bolts are evenly arranged at intervals along the circumference on the upper part of the head body. The adjusting bolts penetrate through the head body and then connect to the outer wall of the die. The die is made of a high-temperature resistant flexible material. By turning the adjusting bolts to extrude the shape of the die, the included angle between the die and the upper part of the mandrel can be adjusted, and the size of the material channel can be changed.

[0012] The beneficial effects of the present utility model are as follows: In the present utility model, a die protruding from the top end of the head body is provided. When the guiding groove of the water cooling box leads the water out of the water cooling box, the protruding die pulls apart the distance between the water cooling box and the head body, so that the water flow led out by the guiding groove cannot contact the head body, preventing the head body from being splashed wet, making the temperature inside and outside the head consistent, the material inside the head stable, and also reducing the damage to the head itself.

[0013] A spiral groove is arranged on the outer wall of the mandrel. After the material enters the extruder through the material hole, it can flow along the spiral groove on the mandrel to the material channel. The material realizes spiral transportation in the spiral groove, so that the material output direction is not flat transportation but has a winding type, which can increase the toughness of the drip irrigation tape; and the size of the spiral groove gradually becomes smaller from the feeding direction to the discharging direction, so that when the material is guided from the spiral groove to the material channel, the material gradually slows down, assisting the uniform output of the material. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure diagram of the head in Embodiment 1 of the present utility model;

[0015] Figure 2 It is a schematic cross-sectional structure diagram of the head in Embodiment 2 of the present utility model;

[0016] Figure 3 It is a production schematic diagram of the head in the prior art.

[0017] In the figure:

[0018] 1. Head body; 2. Mandrel; 3. Inner diameter rod cavity; 4. Die;

[0019] 5. Spiral groove; 6. Fixing bolt; 7. Feeding hole; 8. Material channel;

[0020] 9. Limiting ring; 10. Adjusting bolt; 11. Adjusting ring; 21. Inner mandrel;

[0021] 22. Outer mandrel; Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment 1

[0024] An anti-splash wet extrusion machine head includes a head body 1; the head body is hollow, and a mandrel 2 is arranged inside the head body 1. The outer wall of the mandrel 2 is close to the inner wall of the head body 1, and a cavity 3 for accommodating the inner diameter rod of the drip irrigation tape is arranged inside the mandrel 2; the upper part of the mandrel 2 has a structure with an inwardly converging opening and protrudes from the top end of the head body 1. A die 4 is circumferentially wrapped around the outer side of the upper part of the mandrel 2. The lower part of the die 4 is connected to the top of the head body 1; a ring-shaped groove is arranged at the top end of the head body 1. The lower part of the die 4 protrudes from the upper part and is connected to the head body 1 by being embedded in the ring-shaped groove.

[0025] A limiting ring 9 is arranged at the top end of the head body 1. The limiting ring 9 covers the lower part of the die 4 and the top end of the head body 1. A number of screw holes are distributed on the limiting ring 9, and a number of fixing bolts 6 are respectively fixed on the head body 1 after passing through the screw holes; the upper part of the die 4 protrudes from the top end of the head body 1 and the limiting ring 9.

[0026] The material channel 8 is between the inner wall of the die 4 and the upper part of the mandrel 2; a spiral groove 5 is arranged on the outer wall of the lower part of the mandrel 8; there is also a feed hole 7 on the head body 1. The feed hole 7 penetrates the head body 1 and is connected to the spiral groove 5. The size of the spiral groove 5 gradually becomes smaller from the feed to the discharge direction.

[0027] Exemplarily, an adjusting ring 11 is arranged on the outer side of the upper part of the die 4. The adjusting ring 11 is arranged on the part where the die 4 protrudes from the limiting ring 9. By adjusting the size of the adjusting ring 11, the thickness of the extruded thin-walled plastic pipe can be controlled.

[0028] Exemplarily, a plurality of adjusting bolts 10 are arranged circumferentially on the upper part of the head body 1. The adjusting bolts 10 penetrate the head body 1 and then connect to the outer wall of the die 4. The die 4 is made of a high-temperature resistant flexible material. When the adjusting bolts 10 are turned, the included angle between the die 4 and the upper part of the mandrel 2 can be adjusted. By adjusting the shape of the die 4 by the adjusting bolts 10 to change the size of the material channel 8, the eccentricity of the drip irrigation tape can be controlled, which is convenient for adjusting the thickness of the drip irrigation tape.

[0029] In use, an inner diameter rod is provided in the inner diameter rod cavity 3. After the material enters the extrusion head through the material hole 7, it can be spirally conveyed along the spiral groove 5 to the material passage 8 and output through the discharge pipe connected to the top of the die 4. To ensure that the heated molten particles are shaped immediately after extruding the thin-walled plastic pipe, the discharge pipe is extended into the water-cooling box. At this time, since the upper part of the die 4 protrudes from the top of the head body 1 and the limiting ring 9, the distance between the head body 1 and the water-cooling box is increased. Therefore, the water flow led out by the guiding groove of the water-cooling box cannot contact the head body 1, which can prevent the head body 1 from being splashed wet, make the temperature inside and outside the head consistent, keep the material inside the head stable, and reduce the damage to the head body 1.

[0030] Embodiment 2

[0031] Our company has developed and designed drip irrigation tape production equipment for many years. On August 10, 2023, it applied for a utility model patent with the publication number: CN220517497U, and the patent name is: A single-feed-hole double-layer supply extrusion head. Its mandrel 2 is divided into an inner mandrel and an outer mandrel, and the double-layer supply structure is also applicable to this application. Among them, the upper part of the die 4 protrudes from the top of the head body 1, which also increases the distance between the extrusion head body 1 and the water-cooling box. The water flow led out by the guiding groove of the water-cooling box cannot contact the head body 1, and can also achieve the purpose of preventing the head body 1 from being splashed wet.

[0032] Comparative Example 1

[0033] In the prior art, the die 4 and the limiting ring 9 in the head are on the same plane. When the discharge pipe connected to the head is extended into the water-cooling box and the water in the water-cooling box cools the discharge pipe, the distance between the head body and the water-cooling box is relatively close, and it is easy to wet the head.

[0034] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A splash-proof extruder die head, comprising a die body; the die body is hollow inside, and a core rod is provided inside the die body, characterized in that: The outer wall of the core rod is close to the inner wall of the head body, and the core rod is provided with a cavity for accommodating the inner diameter rod of the drip irrigation tape; The upper part of the mandrel has an inwardly constricted structure and protrudes from the top of the die body. A die is provided along the circumferential direction of the outer side of the upper part of the mandrel. The lower part of the die is connected to the top of the die body and is fixed by a limiting ring provided at the top of the die body. The upper part of the die protrudes from the top of the die body and the limiting ring, and a material channel is provided between the inner wall of the die and the upper part of the core rod; A spiral groove is provided on the lower outer wall of the core rod, and a feed hole is also provided on the head body. The feed hole penetrates the head body and is connected to the spiral groove. The material enters the head from the feed hole, flows along the spiral groove on the core rod and is output from the material channel.

2. A splash-proof extruder head according to claim 1, characterized in that: An annular groove is arranged at the top of the die body, the lower part of the die protrudes from the upper part, and the lower part of the die is connected with the die body by being embedded in the annular groove.

3. A splash-proof extruder head according to claim 1, characterized in that: The limiting ring covers the lower part of the die and the top of the machine head body. A plurality of screw holes are distributed on the limiting ring. A plurality of fixing bolts are respectively passed through the screw holes and fixed on the machine head body.

4. A splash-proof extruder head according to claim 1, characterized in that: An adjusting ring is arranged on the outer side of the upper part of the die, and the adjusting ring is arranged on the part of the die protruding from the limiting ring.

5. The splash-proof extruder head according to claim 1, characterized in that: The size of the spiral groove gradually decreases from the feeding direction to the discharging direction.

6. A splash-proof extruder head according to claim 1, characterized in that: The upper part of the head body is provided with a plurality of adjusting bolts evenly spaced along the circumferential direction. The adjusting bolts penetrate through the head body and are connected to the outer wall of the die. The die is made of high temperature resistant flexible material. The angle between the die and the upper part of the core rod can be adjusted by turning the adjusting bolts to extrude the shape of the die, thereby changing the size of the material channel.

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