CN218053884U

CN218053884U - Forming die of double-color tube

Info

Publication number: CN218053884U
Application number: CN202220535637.0U
Authority: CN
Inventors: 耿振永; 韦立; 何勇
Original assignee: LIANSU MUNICIPAL PIPELINE (HEBEI) CO Ltd
Current assignee: LIANSU MUNICIPAL PIPELINE (HEBEI) CO Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-12-16
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to a technical field of double-colored pipe production, more specifically relates to a forming die of double-colored pipe, including first die holder and at least two sets of second die holders, first die holder is equipped with first runner, second runner, inlayer runner and outer runner, every group the second die holder includes first mold core, second mold core and bush, first mold core with be formed with first runner between the second mold core, the second mold core with be formed with the second runner between the bush, first mold core with be formed with the extrusion runner between the bush. The utility model discloses can realize the double-barrelled production of single line of double-colored pipe, improve the production efficiency of double-colored pipe, and only need two extruders to extrude inlayer raw materials and outer raw materials respectively, avoided according to the problem that space utilization is low that the mould structure caused because of needing a host computer and two auxiliary engines when carrying out the double-barrelled production of single line in the past, reduced the energy consumption simultaneously.

Description

Forming die of double-color tube

Technical Field

The utility model relates to a technical field of double-colored pipe production, more specifically relates to a forming die of double-colored pipe.

Background

At present, a PP-R double-color tube is mainly used in the PP-R market, and the double-color tube can better obstruct light transmission and is generally two colors of one dark color and one light color. The production mode of the existing single-color pipe is single-line double-pipe, and is finished by a host machine and an auxiliary machine (color line), namely, one extruder can simultaneously produce two PPR water supply pipes with the same specification and wall thickness through a double-pipe die and a production line, compared with the common single-color PP-R pipe, the production process of the double-color pipe is relatively complex, the double-color pipe needs to mix the raw materials of two colors together through a co-extrusion technology, and then the two raw materials are extruded and formed into a product through a die core, if single-line double-pipe production is carried out according to the traditional die structure, one host machine, two auxiliary machines and an additional color line extruder are needed, two pipes are simultaneously extruded and produced through feeding of one extruder, and due to the fact that precision error exists in die processing, the heat transfer of an external heating device possibly exists difference during production, the extrusion speed of the two pipes possibly exists difference, namely, one is fast and one slow, and then a sizing device with the same supercooling sizing condition leads to the performance of the two pipes to exist obvious difference.

The prior art patent discloses a production method of a double-color pipeline and a double-color pipeline forming device, which comprise the following steps: the device comprises a shell, a first spiral body, a second spiral body and a forming part; the housing has opposite first and second ends; the second spiral body is arranged in the first spiral body at intervals; the first end is provided with a first feeding hole, one end, close to the first end, of the second spiral body is provided with a second feeding hole, the forming portion is arranged at the second end, and one end, away from the first end, of the first spiral body and one end, away from the first end, of the second spiral body are both connected with the forming portion to enable a first pipeline formed by the first spiral body and a second pipeline formed by the second spiral body to be formed in an extrusion forming mode at the forming portion. In this scheme, can extrude double-colored outer tube and inner tube of pipe simultaneously, but can't be used for single line double-barrelled production in order to produce two double-colored pipes simultaneously, production efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a forming die of double-colored pipe, can be used to two double-colored pipes of coproduction, improves the production efficiency of double-colored pipe.

In order to solve the technical problem, the utility model discloses a technical scheme is:

providing a forming die of a bicolor tube, which comprises a first die holder and at least two groups of second die holders which are connected, wherein the first die holder is provided with a first pouring gate, a second pouring gate, an inner-layer runner and an outer-layer runner, the first pouring gate is communicated with the inner-layer runner, and the second pouring gate is communicated with the outer-layer runner; each group of second die holders comprises a first die core, a second die core and a mouth die, the second die cores are arranged on the periphery of the first die cores at intervals, the mouth dies are arranged on the periphery of the second die cores at intervals, a first flow channel is formed between the first die cores and the second die cores, and a second flow channel is formed between the second die cores and the mouth dies; an extrusion flow channel is formed between the first mold core and the neck mold, one end of the first flow channel is communicated with the inner flow channel, one end of the second flow channel is communicated with the outer flow channel, and the other end of the first flow channel and the other end of the second flow channel are communicated with the extrusion flow channel.

The utility model discloses a forming die of double-colored pipe, including first die holder and at least two sets of second die holders, during the use, connect first runner, second runner and extruder respectively, make the inlayer raw materials get into the inlayer runner from first runner, the outer raw materials get into the outer runner from the second runner; because the inner layer runner is communicated with the first runner, the outer layer runner is communicated with the second runners, the inner layer raw material in the inner layer runner flows into the first runners of each group of second die holders, and the outer layer raw material in the outer layer runner flows into the second runners of each group of second die holders; the second mold cores are arranged on the periphery of the first mold core at intervals, the neck molds are arranged on the periphery of the second mold core at intervals, the second flow channels are arranged on the periphery of the first flow channels at intervals, when the outer layer raw material and the inner layer raw material flow to the extrusion flow channels, the outer layer raw material covers the outer surface of the inner layer raw material and is extruded and formed into the bicolor tube in the extrusion flow channels, the single-line double-tube production of the bicolor tube is realized, and the production efficiency of the bicolor tube is improved; and only two extruders are needed to respectively extrude the inner layer raw material and the outer layer raw material, so that the problem of low space utilization rate caused by the need of one main machine and two auxiliary machines when single-line double-pipe production is carried out according to the conventional die structure is solved, and energy consumption is reduced.

Further, the first flow channel and the second flow channel are both spiral.

The mouth mold comprises a first mouth mold and a second mouth mold which are connected, the first mouth mold is arranged at the periphery of the second mold core at intervals, the first mold core extends into the second mouth mold, a molding runner is formed between the second mold core and the second mouth mold, and the extrusion runner is communicated with the molding runner.

Furthermore, the tail end of the molding runner is in a circular tube shape.

The molding device further comprises a color line mold base, wherein the color line mold base is provided with a color line pouring gate and at least two color line runners, and two ends of each color line runner are respectively communicated with the color line pouring gate and the molding runner.

Further, the inner runner includes a first main runner and at least two sets of first branch runners, one end of the first branch runner is communicated with one end of the first main runner, the other end of the first main runner is connected with the first gate, and the other end of the first branch runner is communicated with the first runner.

Further, the outer runner includes at least two sets of second sprue and at least two sets of second branch runner group, the one end of second branch runner group with the one end intercommunication of second sprue, the other end of second sprue with the second runner is connected, the other end of second branch runner group with the second runner intercommunication.

Furthermore, each first branch runner all is equipped with first flow control valve, every second main flow all is equipped with the second flow control valve.

Furthermore, each group of the second branch runners comprises three second branch runners, and the second branch runners are communicated and arranged between the second main runner and the second runner.

Further, the first die holder comprises a first die holder body and a second die holder body, the first sprue, the second sprue, the first main runner and the second main runner are arranged on the first die holder body, the first main runner is connected with the first branch runners, the first branch runners and the second branch runners are assembled on the second die holder body, and the second main runner is connected with the second branch runner.

The utility model discloses a forming die of double-colored pipe compares with the background art, and the beneficial effect of production does:

the single-wire double-tube production of the double-color tube can be realized, and the production efficiency of the double-color tube is improved; only two extruders are needed to extrude the inner layer raw material and the outer layer raw material respectively, the problem of low space utilization rate caused by the need of one main machine and two auxiliary machines when single-line double-pipe production is carried out according to the traditional die structure is solved, and energy consumption is reduced.

Drawings

Fig. 1 is a schematic structural view of a forming mold for a bicolor tube in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion B of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

fig. 4 is a schematic structural view of the first mold base in the embodiment of the present invention;

in the drawings: 1-a first die holder; 11-a first die holder; 12-a second die holder; 13-a first gate; 14-a second gate; 15-inner layer flow channel; 151-a first primary channel; 152-a first branched flow channel; 16-outer layer flow channel; 161-a second main flow channel; 162-a second branch flow channel; 2-a second die holder; 21-a first mold core; 22-a second mold core; 23-a first die; 24-a second die; 25-a first flow channel; 26-a second flow channel; 27-extruding the runner; 28-forming a runner; 3-a color line die holder; 31-a color line gate; 32-color line flow channel; 4-a first flow regulating valve; 5-second flow regulating valve.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the same, the same is shown by way of illustration only and not in the form of limitation; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms can be understood according to specific situations by those of ordinary skill in the art.

Example one

As shown in fig. 1 to 4, a forming mold for a dual-color tube includes a first mold base 1 and at least two sets of second mold bases 2, the first mold base 1 is provided with a first gate 13, a second gate 14, an inner runner 15 and an outer runner 16, the first gate 13 is communicated with the inner runner 15, and the second gate 14 is communicated with the outer runner 16; each group of second die holders 2 comprises a first die core 21, a second die core 22 and a die, the second die cores 22 are arranged at the periphery of the first die core 21 at intervals, the die is arranged at the periphery of the second die core 22 at intervals, a first flow passage 25 is formed between the first die core 21 and the second die core 22, and a second flow passage 26 is formed between the second die core 22 and the die; an extrusion flow channel 27 is formed between the first mold core 21 and the die, one end of the first flow channel 25 is communicated with the inner layer flow channel 15, one end of the second flow channel 26 is communicated with the outer layer flow channel 16, and the other end of the first flow channel 25 and the other end of the second flow channel 26 are communicated with the extrusion flow channel 27.

When the forming die for the double-color tube is used, the first pouring gate 13 and the second pouring gate 14 are respectively connected with an extruder, so that the inner layer raw material enters the inner layer runner 15 from the first pouring gate 13, and the outer layer raw material enters the outer layer runner 16 from the second pouring gate 14; because the inner layer runner 15 is communicated with the first runner 25, and the outer layer runner 16 is communicated with the second runner 26, the inner layer raw material in the inner layer runner 15 flows into the first runner 25 of each group of second die holders 2, and the outer layer raw material in the outer layer runner 16 flows into the second runner 26 of each group of second die holders 2; because the second mold cores 22 are arranged at the periphery of the first mold core 21 at intervals, and the neck molds are arranged at the periphery of the second mold core 22 at intervals, the second flow passages 26 are arranged at the periphery of the first flow passage 25 at intervals, when the outer layer raw material and the inner layer raw material flow to the extrusion flow passage 27, the outer layer raw material covers the outer surface of the inner layer raw material and is extruded and formed into a bicolor tube in the extrusion flow passage 27, the single-line double-tube production of the bicolor tube is realized, and the production efficiency of the bicolor tube is improved; and only two extruders are needed to respectively extrude the inner layer raw material and the outer layer raw material, so that the problem of low space utilization rate caused by the need of one main machine and two auxiliary machines when single-line double-pipe production is carried out according to the conventional die structure is solved, and energy consumption is reduced.

As shown in fig. 1, the first flow channel 25 and the second flow channel 26 are each helical. After the inner layer raw material enters the first flow channel 25 from the inner layer flow channel 15 and flows in the first flow channel 25, the inner layer raw material can be uniformly distributed on the periphery of the first mold core 21, after the outer layer raw material enters the second flow channel 26 from the outer layer flow channel 16 and flows in the second flow channel 26, the outer layer raw material can be uniformly distributed on the periphery of the second mold core 22 and then covers the outer surface of the inner layer raw material, the discharging pressure of the inner layer raw material is balanced, the discharging pressure of the outer layer raw material is balanced, uniform discharging along the peripheries of the first mold core 21 and the second mold core 22 when the inner layer raw material and the outer layer raw material are extruded to a die mold can be guaranteed, namely, the thicknesses of inner tubes of the bicolor tubes are kept consistent, the thicknesses of outer tubes of the bicolor tubes are kept consistent, and the forming quality of the bicolor tubes is improved.

As shown in fig. 1, the die comprises a first die 23 and a second die 24 which are connected, the first die 23 is arranged at the periphery of the second die core 22 at intervals, the first die core 21 extends into the second die 24, a forming flow passage 28 is formed between the second die core 22 and the second die 24, and the extrusion flow passage 27 is communicated with the forming flow passage 28. In operation, the inner layer material flows in the first flow channel 25, the outer layer material flows in the second flow channel 26 between the second mold core 22 and the die, the outer layer flow channel 16 flows out from one end of the second flow channel 26 and covers the periphery of the inner layer material, the extrusion flow channel 27 between the first mold core 21 and the first die 23 is extruded and molded, and further extrusion is performed in the molding flow channel 28 between the second mold core 22 and the second die 24, so that the density of the inner pipe and the outer pipe with lower density is increased after extrusion, the inner pipe and the outer pipe are compact, and the adhesiveness of the inner pipe and the appearance is improved. Wherein, the end of the molding runner 28 is in a shape of a circular tube, which ensures that the molded bicolor tube is in a shape of a circular tube.

Example two

The embodiment is similar to the embodiment, except that, as shown in fig. 1, the color line mold base 3 is further included, the color line mold base 3 is provided with a color line gate 31 and at least two color line runners 32, and two ends of each color line runner 32 are respectively communicated with the color line gate 31 and the molding runner 28. In practice, a color line extruder is connected with the color line sprue 31, so that the color line melt enters the color line runner 32 from the color line sprue 31, the color line runner 32 is communicated with the forming runner 28, when the inner pipe and the outer pipe are formed into a bicolor pipe in the forming runner 28, the color line melt flows to the outer wall of the bicolor pipe from the color line runner 32, and when the bicolor pipe moves under the action of a tractor, the color line melt coats the outer wall of the bicolor pipe with a color line. When the color line is red, the produced double-color pipe is a hot water supply pipe, and when the color line is blue, the produced double-color pipe is a cold water supply pipe.

EXAMPLE III

The present embodiment is similar to the second embodiment, except that, as shown in fig. 1 and fig. 4, the inner layer runner 15 includes a first main runner 151 and at least two sets of first branch runners 152, one end of the first branch runner 152 is communicated with one end of the first main runner 151, the other end of the first main runner 151 is connected to the first gate 13, and the other end of the first branch runner 152 is communicated with the first runner 25. In practice, the extruder for extruding the inner layer raw material is connected to the first gate 13, and the inner layer raw material flows to the at least two sets of first branch runners 152 through the main runner, so that the inner layer raw material flows into the at least two sets of first runners 25 to be used for molding the inner tubes of the at least two bicolor tubes.

As shown in fig. 1 and 4, the outer layer runner 16 includes at least two sets of second main runners 161 and at least two sets of second branch runners, one end of the second branch runner is communicated with one end of the second main runner 161, the other end of the second main runner 161 is connected with the second gate 14, and the other end of the second branch runner is communicated with the second runner 26. In practice, the extruder for extruding the outer layer raw material is connected to the second gate 14, and the outer layer raw material flows to the at least two second branch flow channel sets through the at least two second main flow channels 161, so that the outer layer raw material flows into the at least two second flow channels 26 for forming the outer tubes of the at least two bicolor tubes.

As shown in fig. 1 and 4, each of the first branch flow passages 152 is provided with a first flow rate adjustment valve 4, and each of the second main flow passages 161 is provided with a second flow rate adjustment valve 5. During implementation, the first flow regulating valve 4 is used for regulating the flow speed and the flow balance of the inner layer raw material, and the second flow regulating valve 5 is used for regulating the flow speed and the flow balance of the outer layer raw material, so that the production speeds of the bicolor tubes on the second die holders 2 in different groups are synchronous, and the quality of the bicolor tubes is ensured.

Specifically, as shown in fig. 1, 3 and 4, each of the second branch flow channel groups includes three second branch flow channels 162, and the second branch flow channels 162 are communicatively disposed between the second main flow channel 161 and the second flow channel 26. Specifically, the center lines of the three second branch runners 162 are respectively parallel to the center line of the second runner 26, and the three second branch runners 162 are uniformly distributed along the circumferential direction of the second runner 26, so that the outer layer raw material is ensured to uniformly flow in from the circumferential direction of the second runner 26, and the outer layer raw material is further ensured to be uniformly extruded from the second runner 26.

As shown in fig. 1 and 4, the first mold base 1 includes a first mold base 11 and a second mold base 12, a first gate 13, a second gate 14, a first main runner 151 and a second main runner 161 are disposed on the first mold base 11, the first main runner 151 is connected to the first branch runner 152, the first branch runner 152 and the second branch runner are assembled on the second mold base 12, and the second main runner 161 is connected to the second branch runner. Specifically, the first gate 13 is disposed at the bottom of the first mold base 11, the second gate 14 is disposed at one side of the first mold base 11, the first main runner 151 and the second main runner 161 are respectively connected to the other side of the first mold base 11, two ends of the first branch runner 152 and two ends of the second branch runner set are respectively connected to two sides of the second mold base 12, and the first mold base 1 is designed in a split manner, so as to facilitate processing and manufacturing of the first mold base 11 and the second mold base 12.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The forming die for the bicolor tube is characterized by comprising a first die holder (1) and at least two groups of second die holders (2), wherein the first die holder (1) is provided with a first pouring gate (13), a second pouring gate (14), an inner-layer runner (15) and an outer-layer runner (16), the first pouring gate (13) is communicated with the inner-layer runner (15), and the second pouring gate (14) is communicated with the outer-layer runner (16); each group of second die holders (2) comprises a first die core (21), a second die core (22) and a die, the second die cores (22) are arranged at the periphery of the first die core (21) at intervals, the die is arranged at the periphery of the second die core (22) at intervals, a first flow passage (25) is formed between the first die core (21) and the second die core (22), and a second flow passage (26) is formed between the second die core (22) and the die; an extrusion flow channel (27) is formed between the first mold core (21) and the neck mold, one end of the first flow channel (25) is communicated with the inner layer flow channel (15), one end of the second flow channel (26) is communicated with the outer layer flow channel (16), and the other end of the first flow channel (25) and the other end of the second flow channel (26) are communicated with the extrusion flow channel (27).

2. The mold for molding a two-color tube according to claim 1, wherein the first flow channel (25) and the second flow channel (26) each have a spiral shape.

3. The mold for forming the bichromal tube according to claim 1, wherein the die comprises a first die (23) and a second die (24) which are connected, the first die (23) is arranged at the periphery of the second die (22) at intervals, the first die (21) extends into the second die (24), a forming flow passage (28) is formed between the second die (24) and the second die (22), and the extrusion flow passage (27) is communicated with the forming flow passage (28).

4. The mold for forming a two-color tube according to claim 3, wherein the end of the forming runner (28) is in a shape of a circular tube.

5. The forming die for the bichromal tube according to claim 3, further comprising a color line die holder (3), wherein the color line die holder (3) is provided with a color line gate (31) and at least two color line runners (32), and two ends of each color line runner (32) are respectively communicated with the color line gate (31) and the forming runner (28).

6. The mold for molding a two-color tube according to claim 1, wherein the inner layer runner (15) comprises a first main runner (151) and at least two sets of first branch runners (152), one end of the first branch runner (152) is communicated with one end of the first main runner (151), the other end of the first main runner (151) is connected with the first gate (13), and the other end of the first branch runner (152) is communicated with the first runner (25).

7. The two-color tube molding die according to claim 6, wherein the outer layer runners (16) include at least two sets of second main runners (161) and at least two sets of second branch runners, one end of the second branch runner set communicating with one end of the second main runner (161), the other end of the second main runner (161) being connected to the second gate (14), the other end of the second branch runner set communicating with the second runner (26).

8. The two-color tube molding die according to claim 7, wherein each of the first branch runners (152) is provided with a first flow rate adjustment valve (4), and each of the second main runners (161) is provided with a second flow rate adjustment valve (5).

9. The mold for molding a two-color tube according to claim 8, wherein each of the second branch runners comprises three second branch runners (162), and the second branch runners (162) are communicatively disposed between the second main runner (161) and the second runner (26).

10. The mold for molding a two-color tube according to claim 7, wherein the first mold base (1) comprises a first mold base (11) and a second mold base (12), the first gate (13), the second gate (14), the first main runner (151) and the second main runner (161) are disposed on the first mold base (11), the first main runner (151) is connected to the first branch runner (152), the first branch runner (152) and the second branch runner are disposed on the second mold base (12), and the second main runner (161) is connected to the second branch runner.