CN115352098A - Pressurizing and preheating method for car tire mold - Google Patents
Pressurizing and preheating method for car tire mold Download PDFInfo
- Publication number
- CN115352098A CN115352098A CN202210949677.4A CN202210949677A CN115352098A CN 115352098 A CN115352098 A CN 115352098A CN 202210949677 A CN202210949677 A CN 202210949677A CN 115352098 A CN115352098 A CN 115352098A
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- CN
- China
- Prior art keywords
- mold
- preheating
- temperature
- closing force
- mold closing
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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.)
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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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0662—Accessories, details or auxiliary operations
-
- 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
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
-
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
-
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0662—Accessories, details or auxiliary operations
- B29D2030/0666—Heating by using fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention discloses a pressurizing and preheating method of a car tire mold, which increases certain pressure during mold preheating by calculating mold closing forces of different specifications, improves the temperature in a mold cavity, achieves the effect of shortening the mold preheating time, and achieves the aims of improving the production efficiency and reducing the steam consumption.
Description
Technical Field
The invention relates to the technical field of tire manufacturing, in particular to a pressurizing and preheating method of a car tire mold.
Background
With the resource and environment cost brought by the development and progress of industry, the energy-saving and emission-reducing work is strengthened, and the urgent need for dealing with global climate change is provided. In the tire manufacturing process, a mold must be preheated and can be vulcanized when reaching a certain temperature, otherwise, a series of quality problems can occur, the traditional tire mold preheating mode is a hot mold which is preheated to the required temperature by a cold mold, a large amount of time and steam are consumed, and in consideration of energy and working efficiency, through research, the tire mold preheating mode is changed, and under the condition of not increasing equipment and other investment, the mold preheating time is shortened by improving a mold preheating method, so that the purposes of improving the production efficiency and reducing the steam consumption are achieved.
Disclosure of Invention
The invention aims to provide a pressurizing and preheating method of a car tire mold, which aims to solve the technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pressurizing and preheating method for a car tire mold comprises the following steps:
step 1: according to the specification and size of tires and the sizes of molds of different manufacturers, the mold closing force required by mold preheating is calculated, the mold closing force for mold preheating is set according to 30% -50% of the mold closing force required by vulcanized tires, the mold closing force controlled by a hydraulic cylinder is adopted to ensure that the numerical value is stable and cannot fluctuate too much, and the tolerance of the mold closing force is controlled within +/-50 KN;
and 2, step: assembling a tire mold, cleaning impurities on the surface of the mold before assembling, adjusting fit clearance, and confirming the fit clearance between a pattern block and a sliding block, between a steel ring and a side plate, between an upper side plate and an upper cover, and between a lower side plate and a base to ensure that the requirements are met;
and 3, step 3: the mold is put on a machine, a lead pressing test is carried out at 4 points before the mold is put on the machine, so that the mold clamping force is uniform and consistent, when the gasket is used for compensating and preloading, the gasket with uniform size is required to be uniformly placed on the periphery, the thickness is less than 0.5mm, the mold clamping device is adjusted after the mold is put on the machine, the mold clamping and pressurizing effect is ensured, and the mold clamping force is set according to the molds of different models;
and 4, step 4: carrying out die assembly preheating, adjusting the height of a heat-insulating cover of the vulcanizing machine in place, confirming that the temperature and the pressure of each medium meet the standard, and starting to calculate the preheating time from the steam temperature to the standard value until the preheating of the die is completed after 2-2.5 hours;
and 5: the measurement of the preheating temperature of the mold is carried out, in order to ensure the accuracy of the measured temperature, a contact type temperature measuring instrument is adopted as a measuring tool, a flat position without pattern lines is selected during measurement, a temperature measuring head is perpendicular to the surface of a side plate and is completed within 3 minutes of mold opening, the temperature reduction caused by long-time mold opening is avoided, the surface of the mold is ensured to be clean and pollution-free, and finally the surface temperature of the mold reaches over 160 ℃, namely the mold is qualified after preheating.
The invention has the beneficial effects that: according to the invention, through calculating the mold clamping forces of different specifications, certain pressure is increased during mold preheating, the temperature in the mold cavity of the mold is increased, the effect of shortening the mold preheating time is achieved, and the purposes of improving the production efficiency and reducing the steam consumption are achieved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A pressurizing and preheating method for a car tire mold comprises the following steps:
step 1: according to the specification and the size of the tire and the sizes of molds of different manufacturers, the mold closing force required by mold preheating is calculated, the mold closing force for mold preheating is set according to 30% -50% of the mold closing force required by vulcanized tires, the mold closing force controlled by a hydraulic cylinder is adopted to ensure that the numerical value is stable and cannot fluctuate too much, and the tolerance of the mold closing force is controlled within +/-50 KN;
step 2: assembling a tire mold, cleaning impurities on the surface of the mold before assembling, adjusting fit clearance, confirming the fit clearance between the pattern block and the sliding block, between the steel ring and the side plate, between the upper side plate and the upper cover, and between the lower side plate and the base, and ensuring the requirement is met;
and step 3: the method comprises the following steps that a mould is arranged on a machine, a lead pressing test is carried out at 4 points before the mould is arranged on the machine, so that the uniformity and consistency of mould closing force are ensured, when a gasket is used for compensating and preloading, the gasket with uniform size is required to be uniformly arranged on the periphery, the thickness is less than 0.5mm, a mould closing device is adjusted after the mould is arranged on the machine, the effect of mould closing and pressurizing is ensured, and the mould closing force is set according to moulds of different models;
and 4, step 4: carrying out die assembly preheating, adjusting the height of a heat-insulating cover of the vulcanizing machine in place, confirming that the temperature and the pressure of each medium meet the standard, and starting to calculate the preheating time from the steam temperature to the standard value until the preheating of the die is completed after 2-2.5 hours;
and 5: the measurement of the preheating temperature of the die is carried out, in order to ensure the accuracy of the measured temperature, a contact type temperature measuring instrument is adopted as a measuring tool, a flat position without a pattern line is selected during measurement, a temperature measuring head is perpendicular to the surface of a side plate and is completed within 3 minutes after die opening, temperature reduction caused by long-time die opening is avoided, the surface of the die is ensured to be clean and pollution-free, and finally the surface temperature of the die reaches over 160 ℃, namely the preheating is qualified.
The tire mold can be normally produced only when being preheated to more than 160 ℃, in order to verify the effect of a new preheating mode, 12 pairs of molds with different sizes are selected for verification in the test, the data of the traditional preheating mode and the new preheating mode are compared, the unified preheating time is 2 hours, the mold clamping force is set according to 30% -50% of the mold clamping force required by vulcanizing the tire, the temperature is measured according to the method after preheating is completed, and the specific data are shown in the following table.
As can be seen from the above table, the mold is preheated for 2 hours, if the traditional preheating mode is used, the maximum temperature of the mold is 145.5 ℃, the requirement cannot be met, the pressurizing preheating mode is adopted, the preheating temperature of the mold reaches more than 161 ℃, the requirement is completely met, and the temperature is at least increased by 15 ℃ compared with the traditional preheating mode.
Mileage performance;
and (4) performing mileage performance test on the finished tire produced in the pressurizing and preheating mode, and detecting according to the highest standard, wherein the test result meets the performance requirement. Specific data are as follows.
Measuring temperature data;
and selecting a 205/55R16 specification to carry out a temperature measurement test, preheating the die in a pressurizing and preheating mode, and detecting the vulcanization data of the first-die tire.
According to temperature measurement tests, the vulcanization degree of the tire reaches more than 90% after the positive vulcanization time of the tire is over, 19 temperature measurement points are counted, various rubber materials pass through the flat vulcanization stage of the rubber vulcanization process, certain safety time exists, and the tire produced by the mold in a pressurization preheating mode completely meets the vulcanization requirement.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The pressurizing and preheating method for the car tire mold is characterized by comprising the following steps of:
step 1: according to the specification and the size of the tire and the sizes of molds of different manufacturers, the mold closing force required by mold preheating is calculated, the mold closing force for mold preheating is set according to 30% -50% of the mold closing force required by vulcanized tires, the mold closing force controlled by a hydraulic cylinder is adopted to ensure the stability of the numerical value, and the tolerance of the mold closing force is controlled within +/-50 KN;
step 2: assembling a tire mold, cleaning impurities on the surface of the mold before assembling, adjusting fit clearance, and confirming the fit clearance between a pattern block and a sliding block, between a steel ring and a side plate, between an upper side plate and an upper cover, and between a lower side plate and a base;
and step 3: the mold is put on a machine, a lead pressing test is carried out at 4 points before the mold is put on the machine, so that the mold closing force is ensured to be uniform and consistent, when the gasket is used for compensating and preloading, the gasket with uniform size is uniformly placed on the periphery, the thickness is less than 0.5mm, the mold closing device is adjusted after the mold is put on the machine, the mold closing and pressurizing effect is ensured, and the mold closing force is set according to the molds of different models;
and 4, step 4: carrying out die assembly preheating, adjusting the height of a heat-insulating cover of the vulcanizing machine in place, confirming that the temperature and the pressure of each medium meet the standard, and starting to calculate the preheating time from the steam temperature to the standard value until the preheating of the die is completed after 2-2.5 hours;
and 5: the measurement of the preheating temperature of the mold is carried out, a contact type temperature measuring instrument is adopted as a measuring tool, a flat position without a patterned line is selected during measurement, a temperature measuring head is perpendicular to the surface of a side plate and completes mold opening within 3 minutes, temperature reduction caused by long-time mold opening is avoided, the surface of the mold is ensured to be clean and pollution-free, and finally the surface temperature of the mold reaches over 160 ℃, namely the mold is qualified after preheating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949677.4A CN115352098A (en) | 2022-08-09 | 2022-08-09 | Pressurizing and preheating method for car tire mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949677.4A CN115352098A (en) | 2022-08-09 | 2022-08-09 | Pressurizing and preheating method for car tire mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115352098A true CN115352098A (en) | 2022-11-18 |
Family
ID=84032931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210949677.4A Pending CN115352098A (en) | 2022-08-09 | 2022-08-09 | Pressurizing and preheating method for car tire mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115352098A (en) |
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2022
- 2022-08-09 CN CN202210949677.4A patent/CN115352098A/en active Pending
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