CN111037879A - Extrusion molding die and extrusion molding process for dissimilar material composite sheath - Google Patents

Extrusion molding die and extrusion molding process for dissimilar material composite sheath Download PDF

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Publication number
CN111037879A
CN111037879A CN201910973087.3A CN201910973087A CN111037879A CN 111037879 A CN111037879 A CN 111037879A CN 201910973087 A CN201910973087 A CN 201910973087A CN 111037879 A CN111037879 A CN 111037879A
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China
Prior art keywords
die sleeve
core
die
extrusion molding
material flow
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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.)
Granted
Application number
CN201910973087.3A
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Chinese (zh)
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CN111037879B (en
Inventor
张冬梅
陈云
周震华
俞敏栋
刘晓洪
卞新海
黄晓炜
陈坚
陆静
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.)
Jiangsu Fasten Optical Communication Technology Co ltd
Jiangsu Fasten Optical Co ltd
Fasten Group Co Ltd
Original Assignee
Jiangsu Fasten Optical Communication Technology Co ltd
Jiangsu Fasten Optical Co ltd
Fasten Group 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.)
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Application filed by Jiangsu Fasten Optical Communication Technology Co ltd, Jiangsu Fasten Optical Co ltd, Fasten Group Co Ltd filed Critical Jiangsu Fasten Optical Communication Technology Co ltd
Priority to CN201910973087.3A priority Critical patent/CN111037879B/en
Publication of CN111037879A publication Critical patent/CN111037879A/en
Application granted granted Critical
Publication of CN111037879B publication Critical patent/CN111037879B/en
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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
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0075—Light guides, optical cables

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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 dissimilar material composite sheath extrusion molding die, which comprises a die core and a die sleeve sleeved on the die core, wherein the die sleeve consists of a die sleeve seat and a die sleeve core, an outer material injection hole is formed in the die sleeve seat, an inner conical surface of the die sleeve seat on the die sleeve seat is matched and positioned with an outer conical surface of the die sleeve core on the die sleeve core, a cavity formed between the front end surface of the die sleeve seat and the front end surface of the die sleeve core is communicated with a channel formed between the inner conical surface of the die sleeve seat and the outer conical surface of the die sleeve core, and the cavity is communicated with the injection hole to form an outer material flow channel; an inner layer material flow channel is formed between the conical surface of the mold core and the inner conical surface of the mold sleeve, and a gap between the mold core shaping surface and the mold sleeve seat shaping surface is formed into a shaping channel; the inner layer material flow enters the inner material flow channel, the outer layer material flow enters the outer layer material flow channel to be tightly wrapped outside the inner layer material flow, and the outer diameter of the outer layer material flow in the shaping channel is proper. The invention can realize the extrusion molding of the dissimilar material composite protective layer under the condition of not replacing the machine head, and for the optical cables with different sizes, only the mould with the corresponding size needs to be replaced.

Description

Extrusion molding die and extrusion molding process for dissimilar material composite sheath
Technical Field
The invention relates to the field of optical cable extrusion molding dies and processes, in particular to an extrusion molding die and an extrusion molding process for a dissimilar material composite sheath.
Background
The composite sheath layer of the heterogeneous material of the existing optical cable is realized by replacing the machine head, and the defects existing in the mode of replacing the machine head are as follows: 1) the manufacturing cost is expensive; 2) the two plastic extruding machines can only be fixed, and the occupied area of the field is large; 3) if the initial planning is single sheath extruding machine in the factory building, the mode of reforming into the compound sheath of dissimilar material is comparatively difficult, needs to be changed into the aircraft nose, and the input is great, still needs the central line of adjustment board, and changes the aircraft nose comparatively to waste time and energy. The invention aims to overcome the defects, can realize flexible switching between the dissimilar material composite protective layer and the single material protective layer on a single-layer plastic extruding machine, only needs to change a mould, and has less investment.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the extrusion molding die and the extrusion molding process for the dissimilar material composite sheath, which aim to solve the prior art, do not need to replace a machine head, reduce the production cost and improve the working efficiency.
The technical scheme adopted by the invention for solving the problems is as follows: a dissimilar material composite sheath extrusion molding die comprises a die core and a die sleeve sleeved on the die core, wherein the die sleeve consists of a die sleeve seat and a die sleeve core, an outer material injection hole is formed in the die sleeve seat, an inner conical surface of the die sleeve seat on the die sleeve seat is matched and positioned with an outer conical surface of the die sleeve core on the die sleeve core, a cavity formed between the front end surface of the die sleeve seat and the front end surface of the die sleeve core is communicated with a channel formed between the inner conical surface of the die sleeve seat and the outer conical surface of the die sleeve core, and the cavity is communicated with the injection hole to form an outer material flow channel; an inner layer material flow channel is formed between the conical surface of the mold core and the inner conical surface of the mold sleeve, and a gap between the mold core shaping surface and the mold sleeve seat shaping surface is formed into a shaping channel; the inner layer material flow enters the inner material flow channel, the outer layer material flow enters the outer layer material flow channel to be tightly wrapped outside the inner layer material flow, and the outer diameter of the outer layer material flow in the shaping channel is proper.
Preferably, the surface of the die sleeve core is provided with a plurality of annular sub-runners, the sub-runners divide the surface of the die sleeve core into a plurality of conical surfaces arranged at intervals, and each conical surface is provided with a plurality of sub-runners along the taper direction.
Preferably, the runner located at the tail of the surface of the die sleeve core is aligned with the outer layer material injection hole on the die sleeve seat.
Preferably, the number of the grooves formed in the die sleeve core in the direction from the shunting groove to the front end face of the die sleeve core is gradually increased.
Preferably, the shunting grooves on two adjacent conical surfaces separated by the shunting channels are arranged in a staggered manner.
The invention also provides an extrusion molding process using the extrusion molding die, which comprises the steps of placing the cable core on a pay-off rack, installing the cable core, the mold core and the mold sleeve in a machine head through the machine head, wherein the machine head is connected with a first extrusion molding machine, a second extrusion molding machine and a vacuum pump, an inner layer material flow is formed in the first extrusion molding machine, an outer layer material flow is formed in the second extrusion molding machine, coating the dissimilar material composite protective layer through the machine head, sucking air between the cable core and the inner layer material flow through the vacuum pump to enable the cable core and the protective layer to be tightly combined, then, cooling the cable core in a cooling water tank, drawing the cable core through a drawing system.
Preferably, an electric spark instrument is arranged in front of the cooling water tank and used for detecting the defects on the surface of the dissimilar material composite sheath.
Preferably, the ratio of the extrusion thickness of the inner layer flow and the outer layer flow is realized by adjusting the ratio of the extrusion amount of the first extruder and the second extruder.
Preferably, the outer diameter of the finished cable is achieved by adjusting the extrusion amount of the extruder and the drawing speed of the drawing system, and the appropriately sized core and die sleeve.
Compared with the prior art, the invention has the advantages that:
1) the die sleeve is divided into a die sleeve seat and a die sleeve core, a cavity is formed between the front end surface of the die sleeve seat and the front end surface of the die sleeve core, channels formed between the inner conical surface of the die sleeve seat and the outer conical surface of the die sleeve core are communicated, the inner conical surface of the die sleeve seat and the outer conical surface of the die sleeve core are communicated with each other and are communicated with an injection hole on the die sleeve seat to form an outer layer material flow channel, and an outer layer material flow is injected through the outer layer material flow channel; an inner layer material flow channel is formed between the conical surface of the mold core and the conical surface in the mold sleeve, and a gap between the mold core shaping surface and the mold sleeve seat shaping surface is formed into a shaping channel; inner layer material stream gets into inner stream passageway, and outer material stream gets into the inseparable parcel of outer material stream passageway and flows the outside at inner layer material to obtain suitable external diameter in the design passageway, thereby can realize the extrusion molding of the compound sheath of dissimilar material, and need not change the aircraft nose so troublesome, to the optical cable of unidimensional not, only need to change corresponding size the mould can.
2) The surface of the die sleeve core is provided with the plurality of annular sub-runners, the sub-runners divide the surface of the die sleeve core into the plurality of conical surfaces which are arranged at intervals, and each conical surface is provided with the plurality of sub-runners along the taper direction, so that material flows entering the outer layer material flow channel can be uniformly and fully mixed under the action of the sub-runners and the sub-runners, the effect of the material distribution cone is achieved, on one hand, the step of independently utilizing the material distribution cone to mix materials is reduced, the extrusion efficiency is improved, on the other hand, the material distribution cone is not used, and the equipment cost can be saved.
Drawings
FIG. 1 is a schematic structural diagram of a mold core in the invention;
FIG. 2 is a schematic structural diagram of a die sleeve core in the invention;
FIG. 3 is a cross-sectional view AA in FIG. 2;
FIG. 4 is a cross-sectional view BB of FIG. 2;
FIG. 5 is a cross-sectional view CC of FIG. 2;
FIG. 6 is a cross-sectional view DD of FIG. 2;
FIG. 7 is a schematic perspective view of a ferrule core according to the present invention;
FIG. 8 is a schematic structural diagram of a ferrule holder according to the invention;
FIG. 9 is a schematic structural diagram of a die sleeve in the invention;
FIG. 10 is a schematic view of the structure of the mold core and mold sleeve assembly in the invention;
fig. 11 is a schematic view of a production line in the creation of the present invention.
In the figure:
1-mould core fixed surface; 2, a mold core; 3-mold core conical surface; 4-a shunt; 5-front end surface of die sleeve core; 6-conical surface in the die sleeve core; 7-die sleeve core; 8-the outer conical surface of the die sleeve core; 9-a splitter box; 10-front end surface of die sleeve seat; 11-the die sleeve seat fixing surface; 12-a die sleeve seat; 13-an outer layer stream injection hole; 14-inner conical surface of the die sleeve seat; 15-die sleeve; 16-an inner layer stream; 17-an outer layer stream; 18-an inner flow channel; 19-an outer stream channel; 20-shaping the channel; 22-a pay-off rack; 23-extruder one; 24-extruder two; 25-a machine head; 26-a mould; 27-a vacuum pump; 28-cooling water tank; 29-a traction system; 30-an electric spark instrument; 31-a wire take-up system.
Detailed Description
The present invention will be described in further detail with reference to examples.
Referring to fig. 1-10, the invention relates to a dissimilar material composite sheath extrusion molding die, which comprises a die core 2 and a die sleeve 15 sleeved on the die core 2, wherein the die sleeve 15 consists of a die sleeve seat 12 and a die sleeve core 7, an outer material injection hole 13 is arranged on the die sleeve seat 12, a plurality of annular shunt channels 4 are arranged on the surface of the die sleeve core 7, the shunt channels 4 divide the surface of the die sleeve core 7 into a plurality of conical surfaces which are arranged at intervals, a plurality of shunt grooves 9 along the taper direction are arranged on each conical surface, the shunt grooves 9 on two adjacent conical surfaces are arranged in a staggered manner, an inner die sleeve seat conical surface 14 on the die sleeve seat 12 is matched and positioned with an outer die sleeve core conical surface 8 on the die sleeve core 7, a channel of the outer material flow 17 of each shunt channel 4 and the shunt groove 9 is formed between the two surfaces, a die sleeve seat front end surface 10 is arranged on the die sleeve seat 12, a die sleeve core front end surface 5 is arranged on the die sleeve core, the front end surface 10 of the die sleeve seat and the front end surface 5 of the die sleeve core form a cavity which is communicated with the diversion channel 9.
The mold core 2 is provided with a mold core conical surface 3 and a mold core fixed surface 1, the mold core fixed surface 1 is positioned at the front end of the mold core 2 and is in smooth transition with the mold core conical surface 3, the mold sleeve 15 is provided with a mold sleeve inner conical surface 6 and a mold sleeve base fixed surface 11, the mold core conical surface 3 and the mold sleeve inner conical surface 6 form an inner layer material flow channel 18, and the mold core fixed surface 1 is arranged in the mold sleeve base fixed surface 11 at a gap to form a shaping channel 20.
Outer material flow 17 is injected from outer material flow injection hole 13, enter the cavity that is formed by subchannel 4, splitter box 9 and die sleeve seat front end face 10 and die sleeve core front end face 5, link into outer material flow passageway 19, the number that splitter box 9 on the die sleeve core 7 slotted to 5 directions of die sleeve core front end face increases gradually, in order to ensure that outer material flow fully and evenly mixes in outer material flow passageway, the splitter box quantity is less at first, improve the dwell time of material flow in the splitter box, more fully towards the mixing of die sleeve core front end face material flow, need let the material flow fast flow to the cavity that die sleeve seat front end face 10 and die sleeve core front end face 5 formed when being close to die sleeve core front end face this moment, make the material flow in time closely wrap up in the outer material flow of inlayer in the outside. The outer layer flow 17 is mixed uniformly and thoroughly inside the die sleeve 15. The effect similar to the material-separating cone in the machine head is achieved in the die sleeve 15.
The outer layer material flow 17 enters the outer material flow channel 19, the uniform mixing of the material flow is realized under the action of the branch flow channel 4 and the branch flow groove 9, the material flow is not required to be uniformly mixed in a material dividing cone and then injected into a mold like the conventional operation, the inner layer material flow 16 enters the inner material flow channel 18, the outer layer material flow 17 is tightly wrapped outside the inner layer material flow 16, and the proper outer diameter is obtained in the shaping channel 20.
An extrusion molding process of a composite sheath of a dissimilar material is realized, as shown in fig. 11, a cable core is placed on a pay-off stand 22 and is installed in the head 25 through the head 25, a mold core 2 and a mold sleeve 15, wherein the head 25 is connected with a first extruding machine 23, a second extruding machine 24 and a vacuum pump 26, an inner layer material flow 16 is arranged in the first extruding machine 23, an outer layer material flow 17 is arranged in the second extruding machine 24, the composite sheath of the dissimilar material is coated through the head 25, meanwhile, the vacuum pump 26 sucks air between the cable core 21 and the inner layer material flow 16 to enable the cable core 21 and the sheath to be tightly combined, then the cable core enters a cooling water tank 27 for cooling, then the cable core is drawn through a drawing system 28, and finally a finished cable.
An electric spark instrument 29 is arranged in front of the cooling water tank 27 and is used for detecting the defects on the surface of the dissimilar material composite sheath. When the surface of the dissimilar material composite sheath has defects, the electric spark instrument 29 gives an alarm.
The ratio of the extruded thickness of the inner stream 16 and the outer stream 17 is achieved by adjusting the ratio of the extruded amounts of the first extruder 23 and the second extruder 24.
The outer diameter of the finished cable is adjusted by adjusting the extrusion amount of the first extruder 23 and the extruder 24, the drawing speed of the drawing system 28 and the proper mold core and mold sleeve.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides a compound sheath extrusion molding mould of dissimilar material, includes mold core and the die sleeve of suit on the mold core, its characterized in that: the die sleeve consists of a die sleeve seat and a die sleeve core, an outer material feeding hole is formed in the die sleeve seat, an inner conical surface of the die sleeve seat on the die sleeve seat is matched and positioned with an outer conical surface of the die sleeve core on the die sleeve core, a cavity formed between the front end surface of the die sleeve seat and the front end surface of the die sleeve core is communicated with a channel formed between the inner conical surface of the die sleeve seat and the outer conical surface of the die sleeve core, and the cavity is communicated with the feeding hole to form an outer material feeding channel; an inner layer material flow channel is formed between the conical surface of the mold core and the inner conical surface of the mold sleeve, and a gap between the mold core shaping surface and the mold sleeve seat shaping surface is formed into a shaping channel; the inner layer material flow enters the inner material flow channel, the outer layer material flow enters the outer layer material flow channel to be tightly wrapped outside the inner layer material flow, and the outer diameter of the outer layer material flow in the shaping channel is proper.
2. The extrusion molding die for composite sheath of dissimilar material as claimed in claim 1, wherein: the surface of the die sleeve core is provided with a plurality of annular shunt channels, the shunt channels divide the surface of the die sleeve core into a plurality of conical surfaces which are arranged at intervals, and each conical surface is provided with a plurality of shunt grooves along the taper direction.
3. The extrusion molding die for composite sheath of dissimilar material as claimed in claim 2, wherein: wherein the runner at the tail of the surface of the die sleeve core is right aligned with the outer layer material injection hole on the die sleeve seat.
4. The extrusion molding die for composite sheath of dissimilar material as claimed in claim 2, wherein: the number of the grooves formed in the direction from the shunting grooves on the die sleeve core to the front end face of the die sleeve core is gradually increased.
5. The extrusion molding die for composite sheath of dissimilar material as claimed in claim 2, wherein: the shunting grooves on two adjacent conical surfaces separated by the shunting channels are arranged in a staggered manner.
6. A process of extrusion molding of the dissimilar material composite sheath extrusion mold according to claim 2, wherein: the cable core is placed on a pay-off stand, the cable core passes through a machine head, a mold core and a mold sleeve are installed in the machine head, the machine head is connected with a first plastic extruding machine, a second plastic extruding machine and a vacuum pump, inner layer material flow is achieved in the first plastic extruding machine, outer layer material flow is achieved in the second plastic extruding machine, the machine head is coated with a dissimilar material composite protective layer, air between the cable core and the inner layer material flow is sucked away through the vacuum pump, the cable core and the protective layer are combined tightly, then the cable core enters a cooling water tank to be cooled, the cooling water tank is pulled through a.
7. The extrusion molding process of the extrusion molding die for the dissimilar material composite sheath according to claim 6, wherein: an electric spark instrument is arranged in front of the cooling water tank and used for detecting the defects on the surface of the dissimilar material composite sheath.
8. The extrusion molding process of the extrusion molding die for the dissimilar material composite sheath according to claim 6, wherein: the ratio of the extrusion thickness of the inner layer flow and the outer layer flow is realized by adjusting the ratio of the extrusion amount of the first extruder and the second extruder.
9. The extrusion molding process of the extrusion molding die for the dissimilar material composite sheath according to claim 6, wherein: the outer diameter of the finished cable is achieved by adjusting the extrusion amount of the extruder and the extruder, the traction speed of the traction system, and the proper size of the mold core and mold sleeve.
CN201910973087.3A 2019-10-14 2019-10-14 Extrusion molding die and extrusion molding process for dissimilar material composite sheath Active CN111037879B (en)

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Application Number Priority Date Filing Date Title
CN201910973087.3A CN111037879B (en) 2019-10-14 2019-10-14 Extrusion molding die and extrusion molding process for dissimilar material composite sheath

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CN111037879B CN111037879B (en) 2021-11-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114783692A (en) * 2022-05-23 2022-07-22 浙江晨光电缆股份有限公司 Cable cabling filling material injection device and injection method
CN115366378A (en) * 2022-08-26 2022-11-22 江苏永鼎盛达电缆有限公司 Extrusion molding mould of special-shaped easy-to-tear cable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202656451U (en) * 2012-07-17 2013-01-09 阔丹-凌云汽车胶管有限公司 Rubber coating extrusion tool
CN103612378A (en) * 2013-12-11 2014-03-05 湖北凯乐科技股份有限公司 Nylon and polyethylene jacket double-layer co-extrusion mold

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202656451U (en) * 2012-07-17 2013-01-09 阔丹-凌云汽车胶管有限公司 Rubber coating extrusion tool
CN103612378A (en) * 2013-12-11 2014-03-05 湖北凯乐科技股份有限公司 Nylon and polyethylene jacket double-layer co-extrusion mold

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114783692A (en) * 2022-05-23 2022-07-22 浙江晨光电缆股份有限公司 Cable cabling filling material injection device and injection method
CN114783692B (en) * 2022-05-23 2022-11-11 浙江晨光电缆股份有限公司 Cable cabling filling material injection device and injection method
CN115366378A (en) * 2022-08-26 2022-11-22 江苏永鼎盛达电缆有限公司 Extrusion molding mould of special-shaped easy-to-tear cable
CN115366378B (en) * 2022-08-26 2024-07-02 江苏永鼎盛达电缆有限公司 Extrusion molding die of special-shaped easy-to-tear cable

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