CN107150453B - Piercing roller - Google Patents
Piercing roller Download PDFInfo
- Publication number
- CN107150453B CN107150453B CN201611142175.1A CN201611142175A CN107150453B CN 107150453 B CN107150453 B CN 107150453B CN 201611142175 A CN201611142175 A CN 201611142175A CN 107150453 B CN107150453 B CN 107150453B
- Authority
- CN
- China
- Prior art keywords
- roller
- sheathed heater
- sheathed
- heater
- main body
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Resistance Heating (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention provides a licker-in roller, which can prevent the temperature unevenness on the surface of the roller and can perform uniform hole forming processing. The pricking roller is provided with a plurality of needles on the surface of a cylindrical roller main body, and comprises: a sheathed heater inserted through the inside of the roller main body; a support member that is provided with one or more through-holes through which the sheathed heater is inserted so as to form a gap between the sheathed heater and an inner circumferential surface of the roller body, and that supports the sheathed heater in a state in which the sheathed heater is inserted through the through-holes; and an insulating insulator disposed between the sheath heater and the support, wherein the pierce roller is configured to transmit heat from the sheath heater to the surface of the roller body by using air in a gap between the sheath heater and the inner circumferential surface of the roller body as a transmission medium.
Description
Technical Field
The present invention relates to a pierce roller for providing a rubber material for a tire with air holes.
Background
In a process for manufacturing a pneumatic tire, a plurality of sheet-like tire rubber materials are stacked to form a green tire (green tire), but if air remains between the stacked tire rubber materials, the air becomes a cause of deterioration in quality of a tire product after vulcanization.
Therefore, conventionally, a hole forming process (puncture forming process) for forming a vent hole in a tire rubber material before a green tire is molded has been performed. For example, in a PLY cutter device in an oblique crossing process for producing PLY by cutting a cord fabric blank at a predetermined angle, a pierce roller having a plurality of cones (needles) is provided, and a plurality of holes for ventilation are formed by the needles on the roller surface by pressing the pierce roller against the cord fabric blank before cutting (patent document 1).
In this case, when the temperature of the cord fabric is low, the holes temporarily formed may be blocked by the elasticity of the rubber, and therefore, the needle is heated by heating the pierce roller for piercing.
As a technique for heating such a pierce roller, a rotary roller in which a heating wire is wound around a cylindrical body made of iron or the like, or a rotary roller in which a heating wire is integrally embedded in aluminum alloy or the like has been conventionally used (patent document 2).
Patent document 1: japanese patent laid-open publication No. 2013-215908
Patent document 2: japanese laid-open patent publication No. 62-37892
However, in the above-described pricking roller, the roller is brought into contact with the heating wire to directly raise the temperature of the roller surface, and therefore, temperature unevenness occurs on the roller surface. Specifically, the temperature of the roller surface near the heating wires increases, while the temperature of the roller surface away from the heating wires decreases. When the hole forming process is performed using such a roller having temperature unevenness, the holes cannot be formed uniformly, and therefore, the quality of the rubber material may become unstable.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a pierce roller capable of preventing temperature unevenness from occurring on the surface of the roller and performing uniform hole forming.
The invention described in claim 1 is a pierce roller in which a plurality of needles are provided on the surface of a cylindrical roller body, the pierce roller comprising:
a sheathed heater inserted through the inside of the roller main body;
a support member that is provided with one or more through-holes through which the sheathed heater is inserted so as to form a gap between the sheathed heater and an inner peripheral surface of the roller main body, and that supports the sheathed heater in a state in which the sheathed heater is inserted through the through-holes; and
an insulating insulator disposed between the sheathed heater and the support member,
the licker-in roller is composed of: the air in the gap between the sheath heater and the inner circumferential surface of the roller body is used as a transmission medium, and the heat from the sheath heater is transmitted to the surface of the roller body.
The invention described in claim 2 is the pierce roller according to claim 1, wherein a plurality of the sheath heaters are disposed inside the roller main body.
The invention described in claim 3 is the pierce roller described in claim 2, and is characterized in that the number of the sheathed heaters is four.
The invention described in claim 4 is the pierce roller according to claim 2 or 3, wherein the sheath heaters are arranged at equal intervals in the circumferential direction.
The invention described in claim 5 is the pierce roller according to any one of claims 1 to 4, characterized in that the insulator is made of porcelain or ceramic.
The invention described in claim 6 is the pierce roller described in any one of claims 1 to 5, characterized in that the roller main body is made of stainless steel.
The invention described in claim 7 is the pierce roller according to any one of claims 1 to 6, characterized in that the sheathed heater is configured by accommodating an electric heating wire inside a metal tube, and an insulating mica spacer is provided between an end face of the metal tube and an electrode portion for supplying electric power to the electric heating wire.
According to the present invention, it is possible to provide a pierce roller capable of preventing the occurrence of temperature unevenness on the roller surface and performing uniform hole forming.
Drawings
Fig. 1 is a schematic view showing a cross-sectional structure of a pierce roller according to an embodiment of the present invention.
Fig. 2 is a view showing a state in which the taker-in roller of fig. 1 is disassembled.
Fig. 3 is a perspective view showing a sheathed heater and a support member of the pierce roller of fig. 1.
Fig. 4 is a schematic cross-sectional view showing the periphery of the support of the piercing roll of fig. 1.
Fig. 5 is a graph showing the relationship between the heater temperature and the surface temperature of the spike roll.
Description of reference numerals: 1 … punching roller; 2 … roller body; 2a … needles; 3 … sheathed heaters; 3a … heating wire; 3b … metal tube; 5 … support member; 6 … supporting the shaft; 9 … bearing; 11 … supply lines; 101 … mica pads; 102 … mica tubes; 103 … insulator; 106 … electrode portion.
Detailed Description
1. Achievement of the Process of the invention
Before describing the embodiments of the present invention, the process of accomplishing the present invention will be described.
The inventors of the present invention first consider that, in order to prevent temperature unevenness from occurring on the roller surface: a rod-shaped sheathed heater in which an electric heating wire and an anti-creeping insulating material (for example, magnesium oxide) are accommodated in a metal tube (sheath) is inserted into a cylindrical roller main body, and the sheathed heater is supported so that a gap is provided between the inner circumferential surface of the roller main body and the sheathed heater.
In this case, since the air in the gap between the inner peripheral surface of the roller main body and the sheath heater is used as a transmission medium to transmit the heat of the sheath heater to the roller main body, and the heat generated from the sheath heater is appropriately dispersed in the air in the gap, unlike the conventional technique in which the roller is in contact with the heating wire, the temperature of the vicinity of the heating wire is not merely increased, and the temperature unevenness on the surface of the roller can be prevented from occurring.
However, when such a sheathed heater is used, there is a new problem that a current supplied to the sheathed heater may leak into the roller main body.
Specifically, in order to appropriately perform the hole forming process on the rubber material for a tire, it is necessary to raise the surface temperature of the pierce roller (prinkingroller) to about 140 ℃. Since the heating temperature of 400 ℃ or higher exceeds the insulation limit temperature of the electrical leakage preventing insulating material filled in the heater, it does not function as an insulating material. In this case, the heating wire inside the sheathed heater may be electrically connected to the roller main body via the metal pipe of the sheathed heater and the support member supporting the sheathed heater, and a leakage failure may occur.
Therefore, the inventors of the present invention have further studied in order to prevent the occurrence of a leakage failure in the case of using a sheathed heater, and have conceived that an insulator made of an insulating material is disposed between the sheathed heater and a support member, so that a current does not flow from a heating wire to a roller main body even when the heater temperature exceeds the insulation limit temperature of the insulating material, and have completed the present invention.
2. The pricking roller of the present embodiment
Hereinafter, a pricking roller according to an embodiment of the present invention will be described in detail.
Fig. 1 is a view schematically showing a cross-sectional structure of a pierce roller according to the present embodiment, and fig. 2 is a view showing an exploded state of the pierce roller of fig. 1. Fig. 3 is a perspective view showing a sheath heater and a support of the pierce roller of fig. 1, and fig. 4 is a view schematically showing a cross-sectional structure of the periphery of the support.
(1) Integral structure
As shown in fig. 1, the pierce roller 1 of the present embodiment has a plurality of sheath heaters 3 inserted inside a roller body 2. In the present embodiment, four sheathed heaters 3 are used (see fig. 3).
The roller body 2 is a cylindrical member, and has a plurality of needles 2a provided at predetermined intervals on the outer peripheral surface thereof, and the needles 2a pierce a tire rubber material (not shown) to form ventilation holes in the tire rubber material. A cylinder made of stainless steel is preferably used for the roller body 2.
The sheathed heater 3 is a rod-shaped heater (see fig. 4) in which a coil of a heating wire (e.g., nichrome wire) 3a as a heating element is housed inside a metal tube 3 b. Further, an insulator (for example, magnesium oxide) for preventing electric leakage is filled in the metal tube 3b of the sheathed heater 3.
Further, although not shown, the sheath heater 3 in the pierce roller is connected to a control mechanism, and the power supply to the sheath heater 3 is controlled so as to maintain the surface temperature of the roller body 2 at a set temperature (for example, 140 ℃).
The spike roll of the present embodiment is characterized by the following two points.
(2) First characteristic
The piercing roller of the present embodiment is characterized by a first feature in that: the roller is provided with a support 5 for supporting the sheathed heater 3 so as to form a gap between the sheathed heater 3 and the inner circumferential surface of the roller body 2, and the heat from the sheathed heater 3 is transmitted to the surface of the roller body 2 by using the air in the gap as a transmission medium.
Specifically, as shown in fig. 3, the support 5 is two disk-shaped members having a plurality of through holes formed therein, the support shaft 6 is inserted through the central through hole of the support 5, and the sheathed heater 3 is inserted through and supported by the through holes around the support shaft 6.
As shown in fig. 1, in the present embodiment, five receiving elements 5 having the above-described structure are provided at predetermined intervals in the axial direction of the sheathed heater 3, and the sheathed heater 3 is inserted into the roller body 2 while being supported by the respective receiving elements 5.
In this way, by supporting each of the plurality of sheathed heaters 3 by the support 5, a gap is formed between the sheathed heater 3 and the inner circumferential surface of the roller body 2. In the present embodiment, the air in the gap serves as a transmission medium, and the heat from the sheathed heater 3 is transmitted to the surface of the roller body 2. At this time, since the heat from the sheathed heater 3 is dispersed when it is transferred to the air, the roller surface and the needles 2a can be uniformly heated without generating temperature unevenness, unlike the conventional roller.
As a result, when the needle 2a is pierced into a rubber material for a tire (not shown) to form a hole for ventilation, the hole can be uniformly formed, and therefore, a rubber material having stable quality can be easily manufactured.
(3) Second characteristic
Next, a second feature of the pierce roller according to the present embodiment is that it includes an insulator for insulating the sheathed heater from the backup material.
As shown in fig. 3 and 4, the insulator 103 is an annular member fitted into the through hole of the support 5, and the sheathed heater 3 is inserted into a hole in the center of the insulator 103. Further, the insulator 103 into which the sheathed heater 3 is inserted is held by being sandwiched between the two supports 5.
The insulator 103 is made of an insulating material (e.g., alumina porcelain, ceramic) that does not lose its insulating function even when the sheathed heater 3 is in a severe high-temperature state, and prevents the sheathed heater 3 from being electrically connected to the support 5.
In the present embodiment, since the insulating insulator 103 is disposed between the sheathed heater 3 and the support 5 in this manner, even when the temperature of the sheathed heater 3 exceeds the insulation limit temperature of the insulation in the metal pipe 3b, current does not flow from the sheathed heater 3 to the support 5, and leakage into the roller main body 2 is prevented.
(4) Other constructions
(a) Component for dealing with leakage
When the sheathed heater 3 is used as in the present embodiment, it is preferable to use a member for coping with leakage in addition to the insulator 103. Specifically, as shown in fig. 3 and 4, an electrode portion 106 connected to the power supply line 11 is attached to an end surface of the sheathed heater 3 in order to supply power to the heating wire 3a inside the heater, but the electrode portion 106 may be electrically connected to the metal tube 3b, which is an outer tube of the sheathed heater 3, and may leak electricity.
In order to prevent such electrical conduction between the electrode portion 106 and the metal pipe 3b of the sheathed heater 3, it is preferable to dispose annular mica spacers 101 made of an insulating material on both end surfaces of the sheathed heater 3, that is, between the electrode portion 106 and the metal pipe 3 b.
The annular mica mat 101 can insulate the electrode portion 106 from the metal pipe 3b, and can electrically connect the electrode portion 106 to the heating wire 3a of the sheathed heater 3.
In addition, the mica spacer 101 also functions to prevent the mica pipe 102 from falling off from the sheathed heater 3.
(b) Number and arrangement of sheathed heaters
In the above-described embodiment, as shown in fig. 3, four sheathed heaters 3 are used, but the number of sheathed heaters is not particularly limited, and may be one. However, in consideration of heating efficiency, etc., it is preferable to use a plurality of sheathed heaters.
In the case where a plurality of sheathed heaters are used, it is preferable that the sheathed heaters are arranged at equal intervals in the circumferential direction. This can increase the temperature of the surface of the roller body more uniformly, and more appropriately prevent temperature unevenness of the roller surface.
The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments. Various modifications can be made to the above-described embodiments within the same or equivalent scope as the present invention.
Claims (6)
1. A pierce roller having a plurality of needles provided on the surface of a cylindrical roller body, comprising:
a sheathed heater inserted through the inside of the roller main body;
a support member that is provided with one or more through-holes through which the sheathed heater is inserted so as to form a gap between the sheathed heater and an inner peripheral surface of the roller main body, and that supports the sheathed heater in a state in which the sheathed heater is inserted through the through-holes; and
an insulating insulator disposed between the sheathed heater and the support member,
the licker-in roller is composed of: transferring heat from the sheathed heater to the surface of the roller body by using air in a gap between the sheathed heater and the inner circumferential surface of the roller body as a transfer medium,
the sheathed heater is configured by accommodating an electric heating wire in a metal tube,
an insulating mica gasket is provided between an end surface of the metal pipe and an electrode portion for supplying power to the heating wire, and a mica pipe is provided on an outer peripheral surface of the metal pipe and between the insulator and the mica gasket.
2. The spike roller of claim 1,
a plurality of the sheathed heaters are disposed inside the roller main body.
3. The spike roller of claim 2 wherein,
the number of the armored heaters is four.
4. A piercing roll as claimed in claim 2 or 3,
the sheathed heaters are arranged at equal intervals in the circumferential direction.
5. A taker-in roller according to any of claims 1-3, characterised in that,
the insulator is formed of porcelain or ceramic.
6. A taker-in roller according to any of claims 1-3, characterised in that,
the roller body is made of stainless steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016040670A JP6736026B2 (en) | 2016-03-03 | 2016-03-03 | Pricking roller |
| JP2016-040670 | 2016-03-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107150453A CN107150453A (en) | 2017-09-12 |
| CN107150453B true CN107150453B (en) | 2020-09-29 |
Family
ID=59791505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611142175.1A Active CN107150453B (en) | 2016-03-03 | 2016-12-12 | Piercing roller |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6736026B2 (en) |
| CN (1) | CN107150453B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871052A (en) * | 2019-04-03 | 2019-06-11 | 上海颐柏科技股份有限公司 | A kind of electrothermal radiation tube temperature control equipment and its control method |
| CN113580615B (en) * | 2021-08-03 | 2022-02-08 | 绍兴寿春针纺织有限公司 | Anti-static wall cloth production process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04241716A (en) * | 1991-01-16 | 1992-08-28 | Ngk Insulators Ltd | Electrode part structure of honeycomb heater |
| CN201146613Y (en) * | 2008-01-18 | 2008-11-05 | 黄生新 | Isothermy electrothermal rotary bowl |
| JP2008265082A (en) * | 2007-04-18 | 2008-11-06 | Bridgestone Corp | Method and apparatus for drilling rubber strip |
| CN101387075A (en) * | 2008-10-23 | 2009-03-18 | 徐永锋 | PCR full-automatic fibre curtain cloth cutting splicer |
| JP2015039811A (en) * | 2013-08-21 | 2015-03-02 | 住友ゴム工業株式会社 | Pricking device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5289374U (en) * | 1975-12-25 | 1977-07-04 | ||
| JPS5332451U (en) * | 1976-08-25 | 1978-03-20 | ||
| JP3648513B2 (en) * | 1999-10-29 | 2005-05-18 | タクミ・エー・エル株式会社 | High-speed response heater unit, plate heater, and plate heater manufacturing method |
| CN104816911B (en) * | 2015-04-28 | 2017-06-16 | 重庆市金盾橡胶制品有限公司 | A kind of conveyer of the tire composite extrusion product line that can be punched |
-
2016
- 2016-03-03 JP JP2016040670A patent/JP6736026B2/en not_active Expired - Fee Related
- 2016-12-12 CN CN201611142175.1A patent/CN107150453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04241716A (en) * | 1991-01-16 | 1992-08-28 | Ngk Insulators Ltd | Electrode part structure of honeycomb heater |
| JP2008265082A (en) * | 2007-04-18 | 2008-11-06 | Bridgestone Corp | Method and apparatus for drilling rubber strip |
| CN201146613Y (en) * | 2008-01-18 | 2008-11-05 | 黄生新 | Isothermy electrothermal rotary bowl |
| CN101387075A (en) * | 2008-10-23 | 2009-03-18 | 徐永锋 | PCR full-automatic fibre curtain cloth cutting splicer |
| JP2015039811A (en) * | 2013-08-21 | 2015-03-02 | 住友ゴム工業株式会社 | Pricking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107150453A (en) | 2017-09-12 |
| JP2017154414A (en) | 2017-09-07 |
| JP6736026B2 (en) | 2020-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4271350A (en) | Blanket wire utilizing positive temperature coefficient resistance heater | |
| CN107150453B (en) | Piercing roller | |
| WO2009014333A1 (en) | Electric heater | |
| KR20210065089A (en) | Insulation units for electrical machines | |
| JPH0452866B2 (en) | ||
| EP2288230A1 (en) | Heating element unit and heating device | |
| US20220072608A1 (en) | Sintering apparatus for selective energization | |
| JP2004323920A (en) | Sintering die of electric pressure sintering device | |
| US2793277A (en) | Textile processing apparatus | |
| US20100200569A1 (en) | Controlled force ptc heater | |
| US11470690B2 (en) | Electrical energy transfer system for a wire mesh heater | |
| KR101546775B1 (en) | Heating element structure of electric heater | |
| KR102567542B1 (en) | Cable structure for electric bedding | |
| JP3935696B2 (en) | Cartridge heater | |
| CN110300464B (en) | Electric heating device and system comprising same and device with body to be heated | |
| CN219811378U (en) | High-frequency radio frequency power resistor with good heat conducting property | |
| CN217827055U (en) | Electrode device and hair curler | |
| US2647509A (en) | Massaging roller | |
| EP3574709B1 (en) | Devices for heating small-diameter tubing and methods of making and using | |
| US2054594A (en) | Electrical heating apparatus | |
| JPS634959Y2 (en) | ||
| JPS6331282B2 (en) | ||
| JP2014086290A (en) | Heater device | |
| JP2012047332A (en) | Heating device of piping | |
| JPS61287223A (en) | Heat treating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |