CN112208081A - Die structure convenient for removing die adhesion precipitate - Google Patents

Die structure convenient for removing die adhesion precipitate Download PDF

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Publication number
CN112208081A
CN112208081A CN202010974852.6A CN202010974852A CN112208081A CN 112208081 A CN112208081 A CN 112208081A CN 202010974852 A CN202010974852 A CN 202010974852A CN 112208081 A CN112208081 A CN 112208081A
Authority
CN
China
Prior art keywords
die
bush
neck ring
round mouth
facilitating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010974852.6A
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Chinese (zh)
Inventor
曾广跃
宋科明
余华林
杨晏茏
谢铖山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN LIANSU PRECISION DIE Co.,Ltd.
Original Assignee
Guangdong Liansu Technology Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Liansu Technology Industrial Co Ltd filed Critical Guangdong Liansu Technology Industrial Co Ltd
Priority to CN202010974852.6A priority Critical patent/CN112208081A/en
Publication of CN112208081A publication Critical patent/CN112208081A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a die structure, in particular to a die structure convenient for removing precipitates adhered to a neck ring die, which comprises the neck ring die, a die core and a neck ring die attachment, wherein the middle of the neck ring die is provided with a containing cavity for containing the die core, a gap between the outer surface of the die core and the inner surface of the containing cavity of the neck ring die forms an annular melt flow channel, the neck ring die attachment is fixed on the end surface of the neck ring die, the die core, the neck ring die and the neck ring die attachment are coaxially arranged, the neck ring die attachment is a hollow cylinder consisting of two semi-circular attachments, a discharge port is formed in the middle of the neck ring die attachment, the discharge port comprises an inner circular opening and an outer circular opening, the radius of the inner circular opening is equal to that of the neck ring die, and the outer side edge of the. Through the die structure, the problems that the carbide is separated out from the die and the cleaning is frequent and difficult can be effectively solved, the surface of the pipe can be prevented from being scraped, and the production efficiency is greatly improved.

Description

Die structure convenient for removing die adhesion precipitate
Technical Field
The invention relates to a die structure, in particular to a die structure convenient for removing precipitates adhered to a die.
Background
At present, extrusion molding of a plastic pipeline needs to be carried out through a mouth mold, the problem of bonding of supplied materials is often caused in the extrusion process, and the problem of roughness of the inner wall of the pipeline is easily caused, for example, Chinese patents disclosed in publication No. CN207523010U and publication No. 2018.6.22, namely a PE pipe extruder mold, wherein through the recombination design of the mouth mold and a core mold, a core insert and a ring insert made of tetrafluoroethylene are adopted to carry out recombination to form the mold, and the defect that high-temperature supplied materials are easily adhered to the inner wall of the mouth mold and the outer wall of the core mold is overcome by utilizing the temperature difference of materials, so that the supplied materials are smoothly extruded without generating bubbles, and the smoothness of the inner wall of a. However, most of the current incoming materials are HDPE, and the molecular weight distribution of the HDPE material is usually mainly unimodal distribution, so that high and low molecular weight polymers exist; the low molecular weight substances are easily decomposed and separated out under the influence of the shearing action of a screw and the processing temperature in the production and processing process, precipitates are easily adhered to a discharge port of a neck mold and finally carbonized when extruded, extruded melt is directly contacted with the adhered carbonized materials, so that more scribing lines with different depths appear on the surface of the pipe, the scribing lines easily cause stress concentration and pipe explosion of the pipe and influence the appearance of the product, and obviously, the condition is not considered in the patent, and the scribing lines appear on the surface of the pipe easily. The existing common practice of production is to remove precipitates through a frequent scraping die, but the scraping is easy to scrape flowers or scrape the surface of a melt by using a tool, the scraped melt is easy to explode in a vacuum box or the scraped precipitated carbide is easy to adhere to the surface of the melt and finally enters or is clamped in a gap of a sizing sleeve because a pipe with a deeper surface scratch needs to be subjected to waste treatment, so that the wire scraping in a larger range is caused, the sizing sleeve needs to be cleaned by stopping the machine, and the production efficiency is seriously influenced.
Disclosure of Invention
The invention provides a die structure convenient for removing precipitates adhered to a neck ring die, which can effectively solve the problems of frequent and difficult cleaning of carbide precipitates separated from the neck ring die, avoid scraping the surface of a pipe and greatly improve the production efficiency.
The technical scheme of the invention is as follows:
the utility model provides a mould structure convenient to drive bush adhesion educt, includes bush, mold core and bush annex, the centre of bush is equipped with and is used for holding the appearance chamber of mold core, the surface of mold core with the clearance that holds between the intracavity surface of bush forms annular fuse-element runner, the bush annex is fixed on the terminal surface of bush, mold core, bush, the coaxial setting of bush annex, the bush annex is the hollow cylinder who comprises two semicircle annular pieces of subsides, and the centre forms discharge port, discharge port includes interior circle mouth and excircle mouth, the radius of interior circle mouth with the appearance chamber radius of bush equals, just the outside border of interior circle mouth with the appearance chamber border of bush is aimed at and is pasted tightly.
The invention improves the mouth mold aiming at the problem that the low molecular weight substances of the mouth mold are separated out, adhered and carbonized to cause the surface of a pipe to be scribed, adds a separable mouth mold attachment which is tightly attached to the surface of the mouth mold, wherein the size of an inner circular opening of the mouth mold attachment is consistent with the size of an accommodating cavity of the mouth mold, which is equivalent to the extension of the length of a melt flow channel of a melt extruded by the mouth mold, so that the low molecular weight substances are directly adhered to the inner circular opening of the mouth mold attachment when being separated out from the melt flow channel, when being cleaned, the separated substances on the inner circular opening can be cleaned only by separating two semicircular ring attachments which form the mouth mold attachment, and after being cleaned, the two semicircular ring attachments are closed again to continue the operation.
Further, the end face of the neck ring die is symmetrically provided with fixing columns at two sides, fixing grooves are formed in the top and the bottom of each fixing column, protrusions matched with the fixing grooves are formed in two ends of each semi-circular patch, and the two semi-circular patches are embedded into the fixing grooves of the fixing columns through the protrusions at the two ends to be installed to form the neck ring die attachment.
The bulges at the two ends of the two semicircular ring-shaped patches are respectively embedded into the fixed grooves of the fixed columns from the upper side and the lower side to be fixed to form the mouth mold patch, low-molecular substances are directly adhered to the inner circular opening of the mouth mold patch when being separated out, the two semicircular ring-shaped patches are separated to remove the separated substances on the inner circular opening when removing the separated substances, and the two semicircular ring-shaped patches are tightly closed after being cleaned up to continue the operation.
Further, the fixing column is a metal column and is welded on the end face of the neck mold.
Further, the protrusion is made of a magnetic material, and the protrusion is embedded in the fixing groove and tightly attracted. The magnetic bulge and the metal fixing groove are tightly attracted and embedded, so that the magnetic bulge and the metal fixing groove can be stably combined and can be conveniently and quickly separated, and the work efficiency of removing precipitates can be improved.
Further, the protrusion is spherical, and the fixing groove is a spherical groove.
Further, the thickness of the inner round opening is 1mm-3 mm.
Further, the thickness of the inner round mouth is 2 mm.
The thickness of the inner round opening is the length of the precipitate which can be adhered, the length of 1mm-3mm is reserved to enable low molecular weight substances to be separated and adhered on the inner round opening, the phenomenon that the extrusion of the pipe is affected due to the fact that the length of the inner round opening is too long is avoided, and the length is preferably 2 mm.
Furthermore, smooth transition is carried out between an inner circular opening and an outer circular opening of the discharge port.
Further, the radius of the outer round opening is larger than that of the inner round opening.
Further, the discharge port is of an R-angle structure.
The discharge port is of an R-angle structure with an outer circular opening larger than an inner circular opening, so that the discharging fluidity of the melt flow channel cannot be influenced in the closing and separating processes of the die attachment, and the operation is convenient.
The invention has the beneficial effects that:
the invention can effectively solve the problems of frequent and difficult cleaning of the precipitated carbide substances of the mouth mold, and has the principle that the precipitated low-molecular substances are changed from originally adhering to the discharge port of the mouth mold to adhering to the inner circular port of the mouth mold attachment by utilizing the mouth mold attachment which can be separated from top to bottom and closed, and the precipitated carbide adhering to the inner circular port is also separated from the surface of the extruded melt along with the separation of the upper semicircular attachment and the lower semicircular attachment, so that the precipitated carbide on the inner circular port can be removed, and the operation can be continued by closing the two semicircular attachments again after the mouth mold is cleaned. The up-and-down separation type die attachment enables precipitates to be convenient to clean and not to scrape the surface of a melt, solves the problem that carbonized materials which are originally cleaned and separated out are easy to adhere to the surface of the melt and finally enter and are clamped in gaps of a sizing sleeve to cause large-area pipe material wire scraping and sizing sleeve cleaning, greatly improves the working efficiency, has the inner circular opening thickness of the end face of the die attachment close to the discharging end face of the die being 1-3 mm, and has the discharging end opening with the R-angle structure, so that the die attachment can not influence the discharging fluidity of a melt flow channel in the closing and separating processes, and is convenient to operate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side schematic view of FIG. 1;
FIG. 3 is a schematic view of the die attachment in a detached state;
FIG. 4 is a schematic end view of a semi-circular patch;
FIG. 5 is an enlarged view of portion A of FIG. 4;
in the figure: the mold comprises a mold 1, a mold core 2, a mold paste accessory 3, a semicircular annular paste piece 301, an inner circular opening 302, an outer circular opening 303, a protrusion 304, a melt flow channel 4, a fixing column 5 and a fixing groove 501.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features 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 positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1-4, a mold structure convenient for removing precipitates adhered to a neck mold comprises a neck mold 1, a mold core 2 and a neck mold attachment 3, wherein a cavity for accommodating the mold core 2 is arranged in the middle of the neck mold 1, an annular melt flow channel 4 is formed in a gap between the outer surface of the mold core 2 and the inner surface of the cavity of the neck mold 1, the neck mold attachment 3 is fixed on the end surface of the neck mold 2, the mold core 2, the neck mold 1 and the neck mold attachment 3 are coaxially arranged, the neck mold attachment 3 is a hollow cylinder formed by two semicircular ring attachments 301, a discharge port is formed in the middle of the neck mold attachment, the discharge port comprises an inner circular port 302 and an outer circular port 303, the radius of the inner circular port 302 is equal to that of the cavity of the neck mold 1, and the outer edge of the inner.
Referring to fig. 1 and 3, in this embodiment, the fixing columns 5 are symmetrically arranged on two sides of the end surface of the die 1, the fixing slots 501 are formed in the top and the bottom of each fixing column 5, the protrusions 304 matched with the fixing slots 501 are arranged at two ends of the semicircular ring-shaped sticker 301, and the two semicircular ring-shaped stickers 301 are embedded into the fixing slots 501 of the fixing columns 5 through the protrusions 304 at the two ends to form the die sticker 3. The bulges 304 at the two ends of the two semicircular ring-shaped patches 301 are respectively embedded into the fixing grooves 501 of the fixing columns 5 from the upper side and the lower side to be fixed to form the mouth mold patch 3, low molecular substances are directly adhered to the inner circular opening 302 of the mouth mold patch 3 when being separated out, the separated substances on the inner circular opening 302 can be removed by separating the two semicircular ring-shaped patches 301 when the separated substances are removed, and the two semicircular ring-shaped patches 301 are tightly closed after being cleaned up, so that the operation can be continued.
The fixing column 5 is a metal column, the fixing column 5 is welded on the end face of the neck mold 1, the protrusion 304 is made of a magnetic material, and the protrusion 304 is embedded in the fixing groove 501 and tightly attracted. The magnetic protrusion 304 and the metal fixing groove 501 are tightly engaged with each other, so that the magnetic protrusion and the metal fixing groove can be stably combined and can be easily and rapidly separated, and the work efficiency of removing the precipitate can be improved. Preferably, the protrusion 304 is spherical and the fixing groove 501 is a spherical groove.
Referring to FIG. 5, the thickness of the inner circular opening 302 may be 1mm to 3mm, in this embodiment 2 mm. The thickness of the inner round mouth 302 is the length of the precipitate which can be adhered, the length of 1mm-3mm can be reserved to enable low molecular weight substances to be separated and adhered on the inner round mouth 302, but the phenomenon that the extrusion of the pipe is affected due to the overlong length of the inner round mouth 302 is avoided, and the length is preferably 2 mm.
Referring to fig. 2 and 4, in the present embodiment, the inner circular opening 302 and the outer circular opening 303 of the discharging port have a smooth transition, the radius of the outer circular opening 303 is larger than that of the inner circular opening 302, and the discharging port has an R-angle structure. The discharge port is an R-angle structure with the outer circular opening 303 larger than the inner circular opening 302, so that the die attachment 3 cannot influence the discharge flowability of the melt flow channel 4 in the closing and separating processes, and the operation is convenient.
The working principle of the invention is as follows:
the invention improves the die of the neck ring die aiming at the problem that the low molecular weight substances of the neck ring die are separated out, adhered and carbonized to cause the surface of a pipe to be scribed, a separable neck ring die attachment 3 which is tightly attached to the surface of the neck ring die 1 is added, the size of an inner round opening 302 of the neck ring die attachment 3 is consistent with the size of an accommodating cavity of the neck ring die 1, which is equivalent to the extension of the length of a melt flow channel 4 of the neck ring die 1 for extruding a melt, so that the low molecular substances are directly adhered to the inner round opening 302 of the neck ring die attachment 3 when being separated from the melt flow channel 4, when being cleaned, the separated substances on the inner round opening 302 can be removed only by separating two semicircular ring attachments 301 which form the neck ring attachment 3, and the two semicircular ring attachments 301 are closed again after being.
Meanwhile, the positioning structure of the fixing groove 501 is added on the neck ring mold 1, so that the upper movable semicircular ring-shaped attachment piece 301 and the lower movable semicircular ring-shaped attachment piece 301 can be accurately positioned, fixed and attached to the neck ring mold 1 when being tightly closed, and the phenomenon that the horizontal positions of the inner circular opening 302 of the neck ring mold attachment 3 and the outer edge of the cavity of the neck ring mold 1 are inconsistent, so that the neck ring mold discharging is influenced, is prevented.
The invention can effectively solve the problems of frequent and difficult cleaning of the carbide precipitated from the mouth mold, and the principle is that the mouth mold attachment 3 which can be separated and closed up and down is utilized, the precipitated low molecular substance is changed from the original state of being adhered to the outlet port of the mouth mold to be adhered to the inner circular port 302 of the mouth mold attachment 3, along with the separation of the upper and lower semicircular attachment pieces 301, the precipitated carbide adhered to the inner circular port 302 is also separated from the surface of the extruded melt, at the moment, the precipitated substance on the inner circular port 302 can be removed, and after the mouth mold is cleaned up, the two semicircular attachment pieces 301 are closed up again, and the operation can be continued.
The up-down separation type neck ring attachment 3 enables precipitates to be convenient to clean and not to scratch the surface of a melt, solves the problem that carbonized materials which are originally cleaned and separated out are easy to adhere to the surface of the melt and finally enter and are clamped in gaps of a sizing sleeve to cause large-area pipe material wire scraping and sizing sleeve cleaning, and greatly improves the working efficiency.
In this embodiment, the process of extruding the melt from the extruder through the melt channel 4 of the die 1, and the process of mounting the die 1 and the core 2 on the extruder, which are well known to those skilled in the art, will not be described. The invention mainly aims at the problem that the surface of a pipe is scribed because the melt is easy to separate out, adhere and carbonize when the melt flows out from a melt runner 4 of a neck ring die 1, and adds a separable neck ring die attachment 3 which is tightly attached to the surface of the neck ring die 1.
The invention is not limited to HDPE pipeline products, and is also suitable for the problem of die-stripping and line scraping generated when pipelines are produced by other materials.
It should be understood that the above-described embodiments of the present invention are merely 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 (10)

1. The utility model provides a mould structure convenient to drive bush adhesion educt, its characterized in that, includes bush, mold core and bush annex, the centre of bush is equipped with and is used for holding the appearance chamber of mold core, the surface of mold core with the appearance intracavity surface of bush clearance between form annular fuse-element runner, the bush annex is fixed on the terminal surface of bush, mold core, bush annex coaxial arrangement, the bush annex is the hollow cylinder who comprises two semi-circular shape patches, middle discharge port that forms, discharge port includes interior round mouth and outer round mouth, the radius of interior round mouth with the appearance chamber radius of bush equals, just the outside border of interior round mouth with the chamber border alignment of bush is pasted tightly.
2. The mold structure convenient for removing die adhesion precipitates according to claim 1, wherein fixing columns are symmetrically arranged on two sides of the end surface of the die, fixing grooves are formed in the top and the bottom of each fixing column, protrusions matched with the fixing grooves are arranged at two ends of each semicircular patch, and the two semicircular patches are embedded into the fixing grooves of the fixing columns through the protrusions at the two ends to be installed to form the die patch.
3. The die structure for facilitating the removal of die adhesion deposits according to claim 2, wherein said fixing posts are metal posts, and said fixing posts are welded to the end face of said die.
4. The die structure for facilitating the removal of die-adhered precipitates as claimed in claim 3, wherein said protrusions are made of a magnetic material, and said protrusions are inserted into said holding grooves and tightly attracted thereto.
5. The die structure for facilitating the removal of die-adhered precipitates as claimed in claim 2, wherein said protrusions are spherical and said holding grooves are spherical recesses.
6. The die structure for facilitating the removal of die-adhered precipitates according to claim 1, wherein said inner round mouth has a thickness of 1mm to 3 mm.
7. The die structure for facilitating the removal of die-adhered precipitates according to claim 6, wherein said inner round mouth has a thickness of 2 mm.
8. The die structure for facilitating the removal of die-adhered precipitates according to claim 1, wherein said discharge port has a smooth transition between an inner round mouth and an outer round mouth.
9. The die structure for facilitating the removal of die adhesion precipitates of claim 8 wherein said outer round mouth has a larger radius than said inner round mouth.
10. The die structure for facilitating the removal of die adhesion deposits as recited in claim 9, wherein said exit ports are in an R-angle configuration.
CN202010974852.6A 2020-09-16 2020-09-16 Die structure convenient for removing die adhesion precipitate Pending CN112208081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010974852.6A CN112208081A (en) 2020-09-16 2020-09-16 Die structure convenient for removing die adhesion precipitate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010974852.6A CN112208081A (en) 2020-09-16 2020-09-16 Die structure convenient for removing die adhesion precipitate

Publications (1)

Publication Number Publication Date
CN112208081A true CN112208081A (en) 2021-01-12

Family

ID=74050419

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010974852.6A Pending CN112208081A (en) 2020-09-16 2020-09-16 Die structure convenient for removing die adhesion precipitate

Country Status (1)

Country Link
CN (1) CN112208081A (en)

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Effective date of registration: 20210823

Address after: 430040 No. 16, Dongwu Avenue, Jinghe street, Dongxihu District, Wuhan City, Hubei Province

Applicant after: WUHAN LIANSU PRECISION DIE Co.,Ltd.

Address before: Shunde Longzhou road Longjiang 528318 Guangdong Liansu industrial village in Foshan Province

Applicant before: Guangdong Liansu Technology Industrial Co.,Ltd.

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