CN114654629A - High-temperature-resistant spring air hole sleeve - Google Patents
High-temperature-resistant spring air hole sleeve Download PDFInfo
- Publication number
- CN114654629A CN114654629A CN202210295852.2A CN202210295852A CN114654629A CN 114654629 A CN114654629 A CN 114654629A CN 202210295852 A CN202210295852 A CN 202210295852A CN 114654629 A CN114654629 A CN 114654629A
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- shaft
- sleeve
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- hole
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a high-temperature-resistant spring air hole sleeve which comprises a sleeve shell with an axle hole, a mandrel and a spring, wherein the spring sleeve is arranged outside the mandrel and is sleeved in the axle hole, an exhaust channel is formed between the outer side surface of the mandrel and the inner side surface of the sleeve shell, the mandrel comprises a shaft head, a shaft body and a shaft tail which are sequentially connected and integrally formed, and the spring sleeve is arranged on the shaft body; the outer diameter of the shaft head is larger than that of the shaft body and is adaptive to the diameter of the top opening of the shaft hole; when no external force acts, the spindle head extends out of the top end of the casing from the top opening of the shaft hole under the elastic force action of the spring; the high-temperature-resistant spring air hole sleeve solves the problems that the spring air hole sleeve is difficult to replace and inconvenient to operate in the prior art.
Description
Technical Field
The invention belongs to the field of tire vulcanization molds, and particularly relates to a high-temperature-resistant spring air hole sleeve.
Background
In the tire vulcanization process, after mold closing is needed to be ensured, gas in the inner rubber raw material in the vulcanization mold is smoothly exhausted, so that a plurality of exhaust holes are formed in the vulcanization mold to communicate the mold cavity with the outer space of the vulcanization mold. In order to ensure that the exhaust holes normally exhaust, the raw materials of the formed tire cannot overflow from the exhaust holes and also cannot block the exhaust holes, in the prior art, a spring air hole sleeve is generally arranged in the exhaust holes, the spring air hole sleeve is provided with an exhaust channel parallel to the axis of the exhaust holes, so that the exhaust of gas in a mold is facilitated, and meanwhile, the overflow of the raw materials is also effectively avoided.
However, because the diameter of the vent hole is very small, the diameter of the spring air hole sleeve can be very small therewith, and deactivation easily occurs during work, namely, a mandrel in the spring air hole sleeve cannot move at a small distance under the action of a spring in the sleeve shell, so that the discharge of gas in the die cavity is influenced.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant spring air hole sleeve, which solves the problems that the spring air hole sleeve is difficult to replace and inconvenient to operate in the prior art.
The invention provides a high-temperature-resistant spring air hole sleeve, which comprises a sleeve shell with an axle hole, a mandrel and a spring, wherein the spring sleeve is arranged outside the mandrel and is sleeved in the axle hole, an exhaust channel is formed between the outer side surface of the mandrel and the inner side surface of the sleeve shell, the mandrel comprises a shaft head, a shaft body and a shaft tail which are sequentially connected and integrally formed, and the spring sleeve is arranged on the shaft body; the outer diameter of the shaft head is larger than that of the shaft body and is adaptive to the diameter of the top opening of the shaft hole; when no external force acts on the sleeve, the mandrel is under the elastic force action of the spring, and the shaft head extends out of the top end of the sleeve shell from the top opening of the shaft hole.
Preferably, the distance from the top end of the shaft head to the bottom end of the shaft body is greater than the height of the casing; when no external force acts, the top surface of the spindle head extends out of the top end of the casing by 1-2mm under the elastic force action of the spring of the spindle.
Preferably, the spindle head comprises a first cylindrical shaft and an inverted first frustoconical shaft; one end of the first cylindrical shaft is fixedly connected with the top end of the shaft body, and the other end of the first cylindrical shaft is fixedly connected with the first round platform shaft; the diameter of the top end of the first circular truncated cone shaft is 0.2-0.5mm larger than that of the top opening of the shaft hole, the diameter of the bottom end of the first circular truncated cone shaft is matched with that of the first cylindrical shaft and is larger than that of the shaft body, and the diameter of the first cylindrical shaft is larger than that of the spring.
Preferably, a plurality of exhaust grooves are formed in the outer side face of the first circular truncated cone shaft, extend downwards from the top face of the first circular truncated cone shaft, and are communicated with the exhaust channel.
Preferably, the shaft tail penetrates out of the bottom end of the housing and comprises a second cylindrical shaft and an inverted second circular truncated cone shaft; one end of the second cylindrical shaft is fixedly connected with the bottom end of the shaft body, and the other end of the second cylindrical shaft is fixedly connected with the top end of the second round platform shaft; the diameter of the second cylindrical shaft is matched with that of the top end of the second round platform shaft and is larger than that of the bottom opening of the shaft hole.
Preferably, the diameter of the second cylindrical shaft is 0.2-1.0mm larger than that of the bottom opening of the shaft hole.
Preferably, the casing comprises an installation part and an air guide part which are integrally formed, the outer diameter of the installation part is matched with the diameter of an air vent on the tire mold, the top surface of the installation part is flush with the port of the air vent on the tire mold facing the cavity, and an outwards convex pressurizing ring and an inwards concave pressure reducing groove are arranged on the outer side surface of the installation part; the outer diameter of the air guide part is smaller than that of the mounting part.
Preferably, the shaft hole includes a large-diameter cylindrical hole and a small-diameter cylindrical hole which are coaxially arranged, the large-diameter cylindrical hole extends into the air guide portion from the top end of the installation portion, the small-diameter cylindrical hole is arranged in the air guide portion and close to the bottom end of the air guide portion, the diameter of the small-diameter cylindrical hole is larger than the diameter of the shaft body and smaller than the diameter of the second cylindrical shaft, and the second cylindrical shaft penetrates out of the small-diameter cylindrical hole.
Preferably, the section of the air guide part at the position of the small-diameter cylindrical hole is provided with a plurality of air guide grooves, and the air guide grooves penetrate through the inner side surface and the outer side surface of the air guide part and are communicated with the exhaust channel and the exhaust hole in the tire mold.
Preferably, the shell, the mandrel and the spring are all made of high-temperature-resistant stainless steel.
The high-temperature-resistant spring air hole sleeve has the beneficial effects that:
1. when no external force acts on the tire, the mandrel is under the elastic force action of the spring, the shaft head extends out of the top end of the sleeve shell from the top opening of the shaft hole, an operator can conveniently clamp the top end of the mandrel through a special tool, the spring air hole sleeve is integrally extracted from the air exhaust hole in the tire mold, and the replacement of the spring air hole sleeve is facilitated.
2. The outer diameter of the shaft head is larger than that of the shaft body and is adaptive to the diameter of the top opening of the shaft hole; the raw materials of the formed tire can not or as little as possible enter the spring air hole sleeve during working, the spring air hole sleeve is prevented from being blocked, and the service life of the spring air hole sleeve is prolonged.
Drawings
FIG. 1 is a schematic view of a high temperature resistant spring air hole sleeve structure according to the technical solution of the present invention,
FIG. 2 is a schematic view of the installation of a high temperature resistant spring air hole sleeve in an exhaust hole of a mold according to the technical scheme,
FIG. 3 is a schematic view of a casing structure of a high temperature resistant spring porous sleeve according to the present invention,
fig. 4 is a schematic structural view of a mandrel of a high-temperature-resistant spring porous sleeve according to a technical scheme of the invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
As shown in fig. 1 to 4, the high temperature resistant spring vent sleeve according to the technical scheme of the present invention includes a sleeve housing 1 having a shaft hole 11, a spindle 2 and a spring 3, wherein the spring 3 is sleeved outside the spindle 2 and is sleeved in the shaft hole 11. An exhaust channel is formed between the outer side surface of the mandrel 2 and the inner side surface of the casing 1. Dabber 2 is including connecting gradually and integrated into one piece's spindle nose 21, axle body 22 and axle tail 23, spring 3 cover is established on the axle body 22. The outer diameter of the shaft head 21 is larger than that of the shaft body 22 and is adapted to the diameter of the top opening of the shaft hole 11. When no external force acts, the spindle 2 is under the elastic force action of the spring 3, and the spindle head 21 extends out of the top end of the casing 1 from the top opening of the shaft hole 11.
Based on the above technical solution, as shown in fig. 1, when there is no external force (when there is no tire or tire molding material in the cavity of the tire mold), the spindle head 21 extends out of the top end of the housing 1 from the top opening of the shaft hole 11 under the elastic force of the spring 3 of the spindle 2. A gap exists between the outer side of the spindle nose 21 and the inner side face of the sleeve 1, an operator can fix the spindle nose 21 on the outer side or the side face through a wrench, a pliers, a hook, a loop rope or other special tools, and the like, then an upward pulling force is exerted, the spindle nose 2 and the sleeve 1 are pulled out from the exhaust hole 101 of the tire 100, a new spring air hole sleeve is installed in the exhaust hole 101, and replacement of the spring air hole sleeve is achieved. When no external force acts on the sleeve, the mandrel 2 is under the elastic force action of the spring 3, and the shaft head 21 extends out of the top end of the sleeve shell 1 from the top opening of the shaft hole 11, so that a force application acting point is provided when the spring air hole sleeve is replaced, and the replacement operation of the spring air hole sleeve is simple and quick.
Based on the above technical scheme, as shown in fig. 2, the outer diameter of the shaft head 21 is larger than the outer diameter of the shaft body 22 and is adapted to the diameter of the top opening of the shaft hole 11. When a tire or tire forming raw material exists in a cavity of a tire mold, namely, in work, the raw material or the tire can apply a pressure to the top end of the mandrel 2, the mandrel 2 is extruded towards the shaft hole 11, the mandrel 2 moves inwards, and the end part of the mandrel (the end part of the shaft head 21) is basically flush with the end part of the sleeve 1 or the opening part of the exhaust hole 101 of the tire 100, so that the normal forming of the tire is ensured, and the defect of a groove caused by the interference of the shaft head 21 on the tire is avoided.
Meanwhile, the shaft head 21 is basically flush with the end part of the sleeve 1 or the opening part of the exhaust hole 101 of the tire 100, so that raw materials and the like can be effectively prevented from flowing into the spring air hole sleeve, the blockage of the air hole sleeve is avoided, and the service life of the spring air hole sleeve is prolonged.
In the technical scheme, the distance from the top end of the shaft head 21 to the bottom end of the shaft body 22 is greater than the height of the casing 1, so that the shaft core 2 can move under the action of the spring 3 in work, particularly, when no external force acts, the top surface of the shaft head 21 extends out of the top end of the casing 1 by 1-2mm under the elastic force action of the spring 3 and the shaft core 2. Even if pop out on the dabber top, be convenient for press from both sides the dabber top and get or snatch or fix, ensure the quick simple change operation of dabber.
In this technical solution, the spindle head 21 includes a first cylindrical shaft 211 and an inverted first circular truncated cone shaft 212. One end of the first cylindrical shaft 211 is fixedly connected with the top end of the shaft body 22, and the other end is fixedly connected with the first truncated cone shaft 212. The diameter of the top end of the first circular truncated cone shaft 212 is 0.2-0.5mm larger than that of the top opening of the shaft hole 11, the diameter of the bottom end of the first circular truncated cone shaft 212 is matched with that of the first cylindrical shaft 211 and is larger than that of the shaft body 22, and the diameter of the first cylindrical shaft 211 is larger than that of the spring 3.
Based on the technical scheme, as shown in fig. 2, the diameter of the top end of the first circular truncated cone shaft 212 is 0.2-0.5mm larger than that of the top opening of the shaft hole 11. In the work promptly, first round platform axle 212 top (spindle nose 21 top) receives the pressure of tire raw materials, and spindle nose 21 moves to shaft hole 11 inboard, but can not get into shaft hole 11 completely in, just so make the specific separation effect of spindle nose 21 top to fashioned tire raw materials for in the tire raw materials can not get into shaft hole 11, can not have more raw materials at least and get into shaft hole 1 in, avoided the problem that spring air pocket cover is blockked up. Meanwhile, due to the mechanical matching of the shaft hole 11 and the side surface of the first circular truncated cone shaft 212, the normal discharge of gas cannot be influenced.
Among the above-mentioned technical scheme, the setting of first cylinder axle 211 for there is a right angle shoulder distance between first cylinder axle 211 and the axle body 22, like this, insert other specialized tools such as hook, circle rope of right angle shoulder position through the side direction, can further ensure to exert the pulling force of extracting to spring air pocket cover, make the operation simpler.
In this technical scheme, be provided with a plurality of air discharge slots 24 on the lateral surface of first round platform axle 212, air discharge slots 24 by the top surface downwardly extending of first round platform axle 212 and with the exhaust passage intercommunication. After the spindle nose 21 does not move into the spindle hole 11 any more, the exhaust efficiency is reduced due to the mechanical engagement between the spindle hole 11 and the side surface of the first circular truncated cone shaft 212, and at this time, the exhaust groove 24 is provided to ensure exhaust.
In this technical scheme, the shaft tail 23 is worn out by the shell 1 bottom, including second cylinder axle 231 and the second round platform axle 232 of inversion. One end of the second cylindrical shaft 231 is fixedly connected with the bottom end of the shaft body 22, and the other end is fixedly connected with the top end of the second circular truncated cone shaft 232. The diameter of the second cylindrical shaft 231 is adapted to the diameter of the top end of the second circular truncated cone shaft 232 and is larger than the diameter of the bottom opening of the shaft hole 11. The diameter of the second cylindrical shaft 231 is larger than that of the bottom opening of the shaft hole 11, so that the second cylindrical shaft 231 is limited in the vertical direction by the shaft core 2, the shaft core 2 rises under the action of spring force, and the shaft core cannot rise any more after the upper end surface of the second cylindrical shaft 231 contacts the bottom end of the sleeve shell. Meanwhile, the diameter of the second cylindrical shaft 231 is larger than that of the bottom opening of the shaft hole 11, and when the shaft core 2 penetrates out of the shaft hole 11, the normal penetration of the mandrel 2 is ensured due to gradual expansion of the outer side inclined plane of the second circular truncated cone shaft 232 to the sleeve and the ductility of metal. When the mandrel 2 is pulled in the reverse direction, the mandrel cannot pass through the casing in the reverse direction because a right-angle shoulder is formed between the second cylindrical shaft 231 and the shaft body 22. The mandrel and the sleeve can be integrally pulled out of the exhaust hole of the mold by applying pulling force to the top end of the mandrel.
In the technical scheme, the diameter of the second cylindrical shaft 231 is 0.2-1.0mm larger than that of the bottom opening of the shaft hole 11, and is optimally 0.6mm, when the mandrel 2 and the sleeve shell 1 are ensured to be installed, the second cylindrical shaft 231 smoothly penetrates out of the shaft hole 11, and simultaneously, when the mandrel 2 is reversely pulled, the mandrel 2 cannot be taken out of the shaft hole 11, so that the mandrel 2 drives the sleeve shell 1 to smoothly pull out the exhaust hole 101 of the mold.
In this technical scheme, cover 1 includes integrated into one piece's installation department 12 and air guide 13, installation department 12 external diameter suits with the last exhaust hole 101 diameter of tire mould 100. The top surface of the mounting portion 12 is flush with the port of the vent hole 101 in the tire mold toward the cavity. The outer side of the mounting portion 12 is provided with a pressurizing ring 15 protruding outward and a relief groove 16 recessed inward. The air guide portion 13 has an outer diameter smaller than that of the mounting portion 12. The sleeve shell 1 is pressed into the exhaust hole 101 through pressure, meanwhile, the installation part 12 is in interference fit with the exhaust hole, the installation of the spring air hole sleeve in the exhaust hole 101 is ensured, and the spring air hole sleeve cannot fall out of the exhaust port in the moving or working process of the die. The arrangement of the pressure increasing ring 15 further increases the matching tightness locally, and the spring air hole sleeve is firmly fixed in the air exhaust hole 101. The arrangement of the pressure reducing groove 16 is to compensate the local metal deformation of the pressure increasing ring 15 caused by the matching, so as to avoid the deformation of the inner side surface of the exhaust hole and influence the normal installation and the normal work of the replaced new spring air hole sleeve.
In this technical scheme, shaft hole 11 includes coaxial big footpath cylinder hole 111 and the path of a circle cylinder hole 112 that sets up, and big footpath cylinder hole 111 extends to the air guide 13 in by installation department 12 top, and path of a circle cylinder hole 112 sets up in air guide 13 and near the air guide bottom. The diameter of the small-diameter cylindrical hole 112 is larger than the diameter of the shaft body 22 and smaller than the diameter of the second cylindrical shaft 231, and the second cylindrical shaft 231 penetrates through the small-diameter cylindrical hole 112. The setting of path cylindric hole 112 has realized the spacing of dabber 2 promptly, when guaranteeing dabber 2 and the installation of cover 1, shaft hole 11 is worn out smoothly to second cylinder axle 231, when guaranteeing dabber 2 reverse pulling simultaneously, can not take off in the shaft hole 11, ensures that dabber 2 drives cover 1 and extracts the exhaust hole 101 of mould smoothly.
In the technical scheme, a plurality of air guide grooves 14 are arranged at the section of the air guide part 13, which is located at the small-diameter cylindrical hole 112, and the air guide grooves 14 penetrate through the inner side surface and the outer side surface of the air guide part 13 and are communicated with an exhaust channel and an exhaust hole on a tire mold. The arrangement of the air guide groove 14 realizes the rapid introduction of the air in the exhaust channel into the exhaust hole 101, and avoids the accumulation of the air in the exhaust channel, which causes the increase of the pressure in the exhaust channel and affects the normal exhaust of the air in the mold. The air guide groove 14 ensures quick exhaust of air in the mold, and improves exhaust efficiency.
In this technical scheme, cover shell, dabber and spring material are high temperature resistant stainless steel, have high temperature resistant ability, prolong its life.
Technical solution of the invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other occasions without modification.
Claims (10)
1. A high-temperature-resistant spring air hole sleeve comprises a sleeve shell with an axle hole, a mandrel and a spring, wherein the spring sleeve is arranged outside the mandrel and is sleeved in the axle hole, an exhaust channel is formed between the outer side surface of the mandrel and the inner side surface of the sleeve shell, the high-temperature-resistant spring air hole sleeve is characterized in that the mandrel comprises a shaft head, a shaft body and a shaft tail which are sequentially connected and integrally formed, and the spring sleeve is arranged on the shaft body; the outer diameter of the shaft head is larger than that of the shaft body and is adaptive to the diameter of the top opening of the shaft hole; when no external force acts on the sleeve, the mandrel is under the elastic force action of the spring, and the shaft head extends out of the top end of the sleeve shell from the top opening of the shaft hole.
2. The high temperature resistant spring vent sleeve of claim 1, wherein the distance from the top end of the spindle head to the bottom end of the spindle body is greater than the height of the sleeve; when no external force acts, the top surface of the spindle head extends out of the top end of the casing by 1-2mm under the elastic force action of the spring of the spindle.
3. The high temperature resistant spring vent sleeve of claim 2, wherein said stub shaft comprises a first cylindrical shaft and an inverted first frustoconical shaft; one end of the first cylindrical shaft is fixedly connected with the top end of the shaft body, and the other end of the first cylindrical shaft is fixedly connected with the first round platform shaft; the diameter of the top end of the first circular truncated cone shaft is 0.2-0.5mm larger than that of the top opening of the shaft hole, the diameter of the bottom end of the first circular truncated cone shaft is matched with that of the first cylindrical shaft and is larger than that of the shaft body, and the diameter of the first cylindrical shaft is larger than that of the spring.
4. The high-temperature-resistant spring vent bush according to claim 3, wherein a plurality of air exhaust grooves are formed in the outer side face of the first circular truncated cone shaft, extend downwards from the top face of the first circular truncated cone shaft, and are communicated with the air exhaust channel.
5. The high-temperature-resistant spring vent sleeve according to claim 1, wherein the shaft tail penetrates out of the bottom end of the sleeve housing and comprises a second cylindrical shaft and an inverted second circular truncated cone shaft; one end of the second cylindrical shaft is fixedly connected with the bottom end of the shaft body, and the other end of the second cylindrical shaft is fixedly connected with the top end of the second round platform shaft; the diameter of the second cylindrical shaft is matched with that of the top end of the second round platform shaft and is larger than that of the bottom opening of the shaft hole.
6. The high temperature resistant spring vent sleeve of claim 5, wherein the diameter of the second cylindrical shaft is 0.2-1.0mm larger than the diameter of the bottom opening of the shaft hole.
7. The high-temperature-resistant spring vent sleeve according to claim 1, wherein the sleeve comprises an installation part and an air guide part which are integrally formed, the outer diameter of the installation part is matched with the diameter of an air vent on a tire mold, the top surface of the installation part is flush with the port, facing a cavity, of the air vent on the tire mold, and an outwards-protruding pressurizing ring and an inwards-recessed pressure relief groove are arranged on the outer side surface of the installation part; the outer diameter of the air guide part is smaller than that of the mounting part.
8. The high temperature resistant spring vent sleeve of claim 7, wherein the axial bore includes a large diameter cylindrical bore and a small diameter cylindrical bore coaxially disposed, the large diameter cylindrical bore extending from the top end of the mounting portion into the air guide portion, the small diameter cylindrical bore disposed in the air guide portion and disposed proximate the bottom end of the air guide portion, the small diameter cylindrical bore having a diameter greater than the shaft body diameter and less than a diameter of a second cylindrical shaft, the second cylindrical shaft extending through the small diameter cylindrical bore.
9. The high-temperature-resistant spring vent sleeve as claimed in claim 8, wherein a plurality of air guide grooves are formed in the section of the air guide part at the position of the small-diameter cylindrical hole, and the air guide grooves penetrate through the inner side surface and the outer side surface of the air guide part and are communicated with an exhaust channel and an exhaust hole in a tire mold.
10. The high temperature resistant spring vent sleeve of claim 1, wherein the housing, the mandrel and the spring are all made of high temperature resistant stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295852.2A CN114654629A (en) | 2022-03-24 | 2022-03-24 | High-temperature-resistant spring air hole sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295852.2A CN114654629A (en) | 2022-03-24 | 2022-03-24 | High-temperature-resistant spring air hole sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN114654629A true CN114654629A (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210295852.2A Pending CN114654629A (en) | 2022-03-24 | 2022-03-24 | High-temperature-resistant spring air hole sleeve |
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| CN (1) | CN114654629A (en) |
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