CN211917653U

CN211917653U - Extrusion die is used in drip irrigation zone production

Info

Publication number: CN211917653U
Application number: CN202020485423.8U
Authority: CN
Inventors: 王庆利; 曹喆; 张昆明
Original assignee: Gansu Runnong Water Saving Technology Co ltd
Current assignee: Gansu Runnong Water Saving Technology Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-11-13
Anticipated expiration: 2030-04-07

Abstract

The invention relates to an extrusion die for producing a drip irrigation tape, which relates to the technical field of mechanical equipment.A shunting passage is symmetrically arranged on the upper side and the lower side of the inner part of an opening end on the left side of a core die, an annular passage is formed between the outer side wall of the core die and the inner side wall of a die body, and the shunting passages on the upper side and the lower side are respectively communicated with the annular passage; the middle part of the core mould is provided with a middle flow passage, the middle flow passage is communicated with the inside of the left opening end of the core mould, a plurality of branch flow passages are symmetrically arranged at equal intervals in the core mould at the upper side and the lower side of the middle flow passage, and the branch flow passages are communicated with the inside of the annular flow passage; a shaping flow channel is formed between the inner side wall of the mouth mold and the outer side wall of the core mold, and the shaping flow channel is communicated with the annular flow channel; the left open end of the core die is connected with an external melt discharging device through a connecting flange, so that the ingredients in the runner are more uniform, the phenomenon that the melt at the position of the die is inconsistent with the melt state in the die is avoided, the discharging is more uniform, and the product quality is improved.

Description

Extrusion die is used in drip irrigation zone production

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to an extrusion die for producing a drip irrigation tape.

Background

Drip irrigation is a precise irrigation method, which utilizes a low-pressure pipeline system to directly convey water to the field and then pass through emitters such as drippers, orifices or drip irrigation belts and the like arranged on a capillary; in general, the drip irrigation tape is produced by a plastic extruder and a matched extrusion die, the extrusion die for producing the drip irrigation tape in the prior art forms an extrusion molding product cavity between a core die and a die body and between the core die and the die body, and a flow channel from a nozzle to the cavity is arranged in a bottom die, and the flow channel adopts a structure of an axial flow channel and a radial flow channel, namely, materials sequentially pass through the axial flow channel and the radial flow channel from the nozzle and then enter the cavity, but the extrusion die for producing the drip irrigation tape in the structure has the following defects: because the material that comes out from the nozzle directly flows to the runner behind axial runner and the radial runner, the mould of this kind of structure makes the runner divide the batching inhomogeneous because the unreasonable of structure to cause the fuse-element that is close to nozzle department and the fuse-element state of the discharge gate department that is close to the bush inconsistent, consequently, the ejection of compact is inhomogeneous, can produce the reposition of redundant personnel line moreover on the product, the urgent need to improve.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art, and provides the extrusion die for producing the drip irrigation tape, which is simple in structure, reasonable in design and convenient to use, so that the ingredients in a runner are more uniformly distributed, the phenomenon that the melt at a neck mold is inconsistent with the melt state in the mold is avoided, the discharging is more uniform, and the product quality is improved.

In order to achieve the purpose, the invention adopts the technical scheme that: it comprises a die body, a core die, a mouth die and a gland; a core mold is inserted into the mold body, a fixed block is fixedly arranged on the outer side wall of the left end of the core mold, and the fixed block and the core mold are of an integrated structure; the fixed block is clamped on the left side wall of the die body and is fixedly connected with the left side wall of the die body through a bolt; the right end of the core mold extends outside the mold body, the extending end is fixedly sleeved with a mouth mold, and the left side wall of the mouth mold is clamped in a clamping groove formed in the right side wall of the mold body; the outer side wall of the mouth mold is sleeved with a gland, and the gland is fixedly arranged on the right side wall of the mold body through a bolt; the device also comprises an annular flow channel, a middle flow channel, a shaping flow channel, a branch flow channel and a branch flow channel; the upper side and the lower side of the inner part of the opening end on the left side of the core mold are symmetrically provided with sub-runners, an annular runner is formed between the outer side wall of the core mold and the inner side wall of the mold body, and the sub-runners on the upper side and the lower side are respectively communicated with the annular runner; the middle part of the core mould is provided with a middle flow passage, the middle flow passage is communicated with the inside of the left opening end of the core mould, a plurality of branch flow passages are symmetrically arranged at equal intervals in the core mould at the upper side and the lower side of the middle flow passage, and the branch flow passages are communicated with the inside of the annular flow passage; a shaping flow channel is formed between the inner side wall of the mouth mold and the outer side wall of the core mold, and the shaping flow channel is communicated with the annular flow channel; the open end of the left side of the core mould is connected with an external melt discharging device through a connecting flange.

Furthermore, the included angle formed by the plurality of branch flow channels and the discharge direction of the annular flow channel is 30-60 degrees; the included angles between the branch flow channel and the annular flow channel and between the branch flow channel and the intermediate flow channel are prevented from being too large, and retained materials are formed at the crossed parts.

Furthermore, the diameter of the middle flow passage is gradually increased from left to right; the phenomenon of uneven distribution of the molten material in the flow channel mainly occurs at the tail end of the annular flow channel, and the more the tail end of the annular flow channel is, the more a large amount of molten material is required to be supplied, namely the diameter of the middle flow channel is increased, so that the distribution amount of the molten material is increased.

Furthermore, a protective cover is rotatably arranged on the outer side of the gland through threads, and the protective cover is covered on the right sides of the mouth mold and the core mold; when the mold is not produced, the protective cover is screwed on the pressure cover, so that dust is prevented from entering the inside of the shaping flow channel; when the mold is used for production, the protective cover is directly rotated and taken down.

Furthermore, an outer casing is fixedly covered on the outer side wall of the die body, a cavity is arranged between the outer casing and the outer side wall of the die body, a heating wire is arranged in the cavity, and the heating wire is wound on the outer side wall of the die body; the heating wire is connected with an external power supply; the bottom of the outer housing is fixedly provided with a mounting seat which is fixedly arranged on the external machine frame; when the melt enters into the inside of mandrel, open the heater strip, heat the inside melt of mandrel, avoid appearing the phenomenon that the melt condenses in advance.

Furthermore, the distance between every two heating wires is gradually increased from left to right; the temperature of the discharge port of the neck ring mold is lower than the internal temperature, the heating wires are gradually sparse, and the phenomenon that the temperature difference between the inner side and the outer side is too large is avoided.

The working principle of the invention is as follows: connecting the feeding end of the core mold with an external melt discharging device through a connecting flange; high-temperature melt enters the inside of the core mold from the open end on the left side of the core mold, then a part of melt enters the inside of the annular flow channel from the branch flow channel, the other part enters the inside of the branch flow channel from the middle flow channel, and then enters the inside of the annular flow channel from the branch flow channel section, the annular flow channel is completely filled with the batching gaps from left to right, then the melt is extruded from the annular flow channel and enters the inside of the shaping flow channel for shaping operation, finally, the product is discharged from the discharge port of the die, and the product directly enters the cooling pool for cooling and shaping after coming out.

After adopting the structure, the invention has the beneficial effects that:

1. the melt is respectively conveyed to different positions of the annular runner through the middle runner and the branch runners, so that the ingredients in the runner are more uniform, the phenomenon that the melt at the position of the neck mold is inconsistent with the melt state in the mold body is avoided, the discharging is more uniform, and the product quality is improved;

2. the sizes of the annular flow channel and the shaping flow channel are longer than those of the prior art, so that the stability of the production size of the drip irrigation tape is improved, and the quality of the product is ensured.

Drawings

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

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a sectional view a-a in fig. 1.

Fig. 3 is a schematic view showing the structure of the core mold of the present invention.

Fig. 4 is a schematic view of the internal structure of the outer casing of the present invention.

Description of reference numerals:

the device comprises a die body 1, a core die 2, a mouth die 3, a gland 4, a clamping groove 5, an annular flow passage 6, a middle flow passage 7, a shaping flow passage 8, a branch flow passage 9, a branch flow passage 10, a protective cover 11, an outer housing 12, a cavity 13, a heating wire 14, a mounting seat 15, a fixing block 16 and a connecting flange 17.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 4, the technical solution adopted by the present embodiment is: the die comprises a die body 1, a core die 2, a mouth die 3 and a gland 4; a core die 2 is inserted into the die body 1, a fixed block 16 is fixedly arranged on the outer side wall of the left end of the core die 2, and the fixed block 16 and the core die 2 are of an integrated structure; the fixed block 16 is clamped on the left side wall of the die body 1 and is fixedly connected with the left side wall through a bolt; the right end of the core mold 2 extends outside the mold body 1, a mouth mold 3 is fixedly sleeved on the extending end, and the left side wall of the mouth mold 3 is clamped in a clamping groove 5 formed in the right side wall of the mold body 1; the surface of the core die 2 and the inner wall of the mouth die 3 are provided with a Teflon coating layer which is formed by a spraying process and has the thickness of 0.2-0.3 mm, so that the friction force between a melt and the die during forming can be reduced; the outer side wall of the neck ring mold 3 is sleeved with a gland 4, the gland 4 is fixedly arranged on the right side wall of the mold body 1 through bolts, and the gland 4 tightly presses two sides of the neck ring mold 3 in the clamping groove 5; the device also comprises an annular flow passage 6, a middle flow passage 7, a shaping flow passage 8, a branch flow passage 9 and a branch flow passage 10; the upper side and the lower side of the inner part of the opening end on the left side of the core mold 2 are symmetrically provided with sub-runners 10, an annular runner 6 is formed between the outer side wall of the core mold 2 and the inner side wall of the mold body 1, and the sub-runners 10 on the upper side and the lower side are respectively communicated with the annular runner 6; the middle part of the core mould 2 is provided with a middle flow passage 7, the middle flow passage 7 is communicated with the inside of the left opening end of the core mould 2, and the diameter of the middle flow passage 7 is gradually increased from left to right; the phenomenon of uneven material distribution of the flow channel mainly occurs at the tail end of the annular flow channel 6, a large amount of molten material is required to be supplied towards the tail end of the annular flow channel 6, namely the diameter of the middle flow channel 7 is increased to increase the distribution amount of the molten material, four branch flow channels 9 are symmetrically arranged in the core molds 2 at the upper side and the lower side of the middle flow channel 7 at equal intervals, the four branch flow channels 9 are communicated with the inside of the annular flow channel 6, and the included angle formed by the four branch flow channels 9 and the discharging direction of the annular flow channel 6 is 30-60 degrees; the phenomenon that the included angles between the branch flow channel 9 and the annular flow channel 6 and between the branch flow channel and the middle flow channel 7 are too large and retained materials are formed at the crossed parts is avoided; a shaping flow channel 8 is formed between the inner side wall of the mouth mold 3 and the outer side wall of the core mold 2, and the shaping flow channel 8 is communicated with the annular flow channel 6; the left opening end of the core mould 2 is connected with an external melt discharging device through a connecting flange 17;

the outer side of the gland 4 is rotatably provided with a protective cover 11 through threads, and the protective cover 11 is covered on the right sides of the mouth mold 3 and the core mold 2; when the mold is not produced, the protective cover 11 is screwed on the gland 4, so that dust is prevented from entering the inside of the shaping runner 8; when the mold is used for production, the protective cover 11 is directly rotated and taken down;

an outer casing 12 is fixedly covered on the outer side wall of the die body 1, a cavity 13 is arranged between the outer casing 12 and the outer side wall of the die body 1, a heating wire 14 is arranged inside the cavity 13, the heating wire 14 adopts a resistance heating mode, and the heating wire 14 is wound on the outer side wall of the die body 1; the heating wire 14 is connected with an external power supply, and the power wire passes through the side wall of the outer casing 12 and then is connected with the external power supply; the bottom of the outer housing 12 is fixedly welded with a mounting seat 15, and the mounting seat 15 is fixedly arranged on an external machine frame; when the molten material enters the core mold 2, the heating wire 14 is opened to heat the molten material inside the core mold 2, so that the phenomenon that the molten material is condensed in advance is avoided; the distance between every two heating wires 14 is gradually increased from left to right; the temperature of the discharge hole of the neck mold 3 is lower than the internal temperature, the heating wires 14 are gradually sparse, and the phenomenon that the inner side and the outer side have overlarge temperature difference is avoided.

The working principle of the specific embodiment is as follows: the feeding end of the core mould 2 is connected with an external melt discharging device through a connecting flange 17; high-temperature melt enters the core mold 2 from the left opening end of the core mold 2, then a part of the melt enters the annular flow channel 6 from the branch flow channel 10, the other part of the melt enters the branch flow channel 9 from the middle flow channel 7, and enters the annular flow channel 6 from the branch flow channel 9 in a segmented manner, so that the annular flow channel 6 is completely filled with ingredient gaps from left to right, then the melt is extruded from the annular flow channel 6 and enters the shaping flow channel 8 for shaping, finally, the product is discharged from the discharge port of the mouth mold 3, and the product directly enters the cooling pool for cooling and shaping after coming out.

After adopting above-mentioned structure, this embodiment beneficial effect does:

1. the melt is respectively conveyed to different positions of the annular flow channel 6 through the middle flow channel 7 and the branch flow channels 9, so that the distribution in the flow channel is more uniform, the phenomenon that the state of the melt at the position of the neck mold 3 is inconsistent with that of the melt in the mold body 1 is avoided, the discharging is more uniform, and the product quality is improved;

2. the sizes of the annular flow passage 6 and the shaping flow passage 8 are longer than those of the prior art, so that the stability of the production size of the drip irrigation tape is improved, and the quality of the product is ensured;

3. the heating wire 14 is additionally arranged on the outer side wall of the die body 1, when the molten material enters the core die 2, the heating wire 14 is opened, the molten material in the core die 2 is heated, and the phenomenon that the molten material is condensed in advance is avoided.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An extrusion die for producing a drip irrigation tape comprises a die body (1), a core die (2), a mouth die (3) and a gland (4); a core mold (2) is inserted into the mold body (1), a fixed block (16) is fixedly arranged on the outer side wall of the left end of the core mold (2), and the fixed block (16) and the core mold (2) are of an integrated structure; the fixed block (16) is clamped on the left side wall of the die body (1) and is fixedly connected with the left side wall through a bolt; the right end of the core mold (2) extends to the outer side of the mold body (1), a mouth mold (3) is fixedly sleeved on the extending end, and the left side wall of the mouth mold (3) is clamped in a clamping groove (5) formed in the right side wall of the mold body (1); the outer side wall of the mouth mold (3) is sleeved with a gland (4), and the gland (4) is fixedly arranged on the right side wall of the mold body (1) through bolts; the method is characterized in that: the device also comprises an annular flow passage (6), a middle flow passage (7), a shaping flow passage (8), branch flow passages (9) and branch flow passages (10); the upper side and the lower side of the inner part of the opening end on the left side of the core mold (2) are symmetrically provided with sub-runners (10), an annular runner (6) is formed between the outer side wall of the core mold (2) and the inner side wall of the mold body (1), and the sub-runners (10) on the upper side and the lower side are respectively communicated with the annular runner (6); the middle part of the core mould (2) is provided with a middle flow passage (7), the middle flow passage (7) is communicated with the inside of the left opening end of the core mould (2), a plurality of branch flow passages (9) are symmetrically arranged at equal intervals in the core mould (2) at the upper side and the lower side of the middle flow passage (7), and the branch flow passages (9) are communicated with the inside of the annular flow passage (6); a shaping flow channel (8) is formed between the inner side wall of the mouth mold (3) and the outer side wall of the core mold (2), and the shaping flow channel (8) is communicated with the annular flow channel (6); the left opening end of the core mould (2) is connected with an external melt discharging device through a connecting flange (17).

2. The extrusion die for producing the drip irrigation tape according to claim 1, wherein: the included angle formed by the plurality of branch flow channels (9) and the discharge direction of the annular flow channel (6) is 30-60 degrees; avoid the branch flow channel (9) and the annular flow channel (6) and the intermediate flow channel (7) to form too large included angle, form the material that is detained at the crossing position.

3. The extrusion die for producing the drip irrigation tape according to claim 1, wherein: the diameter of the middle flow passage (7) is gradually increased from left to right; the phenomenon of uneven distribution of the molten material in the flow channel mainly occurs at the end of the annular flow channel (6), and the larger the amount of molten material supply is toward the end of the annular flow channel (6), i.e., the larger the diameter of the intermediate flow channel (7) is, the larger the distribution amount of the molten material is.

4. The extrusion die for producing the drip irrigation tape according to claim 1, wherein: the outer side of the gland (4) is rotatably provided with a protective cover (11) through threads, and the protective cover (11) is covered on the right sides of the mouth mold (3) and the core mold (2); when the mold is not produced, the protective cover (11) is screwed on the gland (4) to prevent dust from entering the inside of the shaping flow passage (8); when the mold is used for production, the protective cover (11) is directly rotated and taken down.

5. The extrusion die for producing the drip irrigation tape according to claim 1, wherein: an outer casing (12) is fixedly covered on the outer side wall of the die body (1), a cavity (13) is arranged between the outer casing (12) and the outer side wall of the die body (1), a heating wire (14) is arranged inside the cavity (13), and the heating wire (14) is wound on the outer side wall of the die body (1); the heating wire (14) is connected with an external power supply; the bottom of the outer housing (12) is fixedly provided with a mounting seat (15), and the mounting seat (15) is fixedly arranged on an external machine frame; when the molten material enters the inner part of the core mold (2), the heating wire (14) is opened to heat the molten material in the core mold (2), so that the phenomenon that the molten material is condensed in advance is avoided.

6. The extrusion die for producing the drip irrigation tape according to claim 5, wherein: the distance between every two heating wires (14) is gradually increased from left to right; the temperature of the discharge hole of the neck mold (3) is lower than the internal temperature, and the heating wires (14) are gradually sparse, so that the excessive temperature difference between the inner side and the outer side is avoided.

7. The extrusion die for producing the drip irrigation tape according to claim 1, wherein: the working principle is as follows: the feeding end of the core mould (2) is connected with an external melt discharging device through a connecting flange (17); high-temperature molten materials enter the core mold (2) from the open end on the left side of the core mold (2), then a part of molten materials enter the annular flow channel (6) from the branch flow channel (10), the other part of molten materials enter the branch flow channel (9) from the middle flow channel (7), then the molten materials enter the annular flow channel (6) from the branch flow channel (9) in a segmented manner, the annular flow channel (6) is completely filled with the mixture gaps from left to right, then the molten materials are extruded from the annular flow channel (6) to enter the shaping flow channel (8) for shaping, finally, product discharging is carried out from the discharge port of the mouth mold (3), and the products directly enter the cooling pool for cooling and shaping after coming out.