CN112412903A - Differentially-controlled mold opening and closing control loop and mold opening and closing control method for vulcanizing machine - Google Patents
Differentially-controlled mold opening and closing control loop and mold opening and closing control method for vulcanizing machine Download PDFInfo
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- CN112412903A CN112412903A CN201910762625.4A CN201910762625A CN112412903A CN 112412903 A CN112412903 A CN 112412903A CN 201910762625 A CN201910762625 A CN 201910762625A CN 112412903 A CN112412903 A CN 112412903A
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- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/20—Opening, closing or clamping
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
Abstract
The invention provides a differentially controlled vulcanizing machine mold opening and closing control loop and a mold opening and closing control method. The pressure of the balance valve can be completely reduced to load weight, the pilot pressure is enough to open the balance valve, the shaking of die assembly is effectively overcome, the energy storage of the lower cavity of the oil cylinder is reduced, and the phenomenon of upward bouncing can not occur when die assembly is stopped; when the die sinking stops, the pressure of the upper rod cavity is unloaded through the electromagnetic valve and the proportional valve, and the hydraulic control one-way valve is added to ensure that the cross beam does not descend. The balance valve and the hydraulic control one-way valve establish a double safety protection function together, the equipment safety standard is improved, and the requirements of a CE secondary safety circuit are met.
Description
Technical Field
The invention relates to the technical field of hydraulic control of a vulcanizing machine, in particular to a differentially controlled mold opening and closing control loop and a mold opening and closing control method of the vulcanizing machine.
Background
In a mold opening and closing hydraulic circuit of a vulcanizing machine, a balance valve needs to be directly installed on a lower cavity cylinder body of a mold opening and closing oil cylinder of the vulcanizing machine for safety, a pilot port of the balance valve is connected to an upper cavity of the oil cylinder, the balance valve can be opened only under the control of the pressure of the upper cavity, accidental mold closing can be avoided, and the condition that two mold opening and closing oil cylinders are unsynchronized in mold closing can be avoided. With the technical development of the vulcanizing machine, the pursuit of customers on production efficiency can effectively improve the mold opening speed through differential mold opening. The differential die sinking means that two oil ports of an upper rod cavity and a lower rodless cylinder of the oil cylinder are communicated, and the difference of the upper area and the lower area of a piston of the oil cylinder is utilized to generate upward driving force, so that the piston moves rapidly, and the rapid die sinking is realized.
However, the differential mold opening and closing loop has the following defects:
1) mold closing and shaking: when the movable die is rapidly extended out at the same time during rapid die closing, the pressure is rapidly reduced, the pilot pressure is not enough to open the balance valve, so that the balance valve is closed during closing, the vibration of the cross beam is reduced, various parts shake violently, the damage is great, and the same phenomenon can occur when the die is heavy and the opening of the proportional valve is large.
2) Gliding when the mold opening is stopped: at the moment when the differential die opening stops, the pressure of the upper cavity is in the same state, and due to the elasticity of oil, the pressure can last for about 1 second, so that the balance valve is opened, the cross beam can descend under the comprehensive action of gravity and the pressure of the upper cavity until the pressure of the upper cavity is reduced to close the balance valve, and the maximum sliding amount can reach 100 mm.
3) Rebounding when stopping: the method for overcoming the 2 nd defect is generally to increase the set pressure of the balance valve, but when the mold is light or has no mold, the lower cavity stores more energy, and the mold is popped up when the mold closing is stopped.
For defects 1 and 3, the equilibrium valve pressure needs to be adjusted down; aiming at the defect 2, the pressure of the balance valve needs to be increased; in addition, the weight of the die is different, the proportional valve is opened in a small size, and the balance valve is difficult to adjust to the optimal pressure.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a differentially controlled mold opening and closing control circuit of a vulcanizing machine and a mold opening and closing control method.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
a differentially controlled mold opening and closing control loop of a vulcanizing machine comprises a three-position four-way proportional valve, a balance valve and a mold opening and closing oil cylinder, wherein a piston rod of the mold opening and closing oil cylinder is connected with a cross beam of the vulcanizing machine, an oil inlet P of the three-position four-way proportional valve is connected with a main oil supply circuit of a hydraulic system, an oil return port T of the three-position four-way proportional valve is connected with a main oil return circuit, a working oil port A of the three-position four-way proportional valve is connected to a lower rodless cavity of the mold opening and closing oil cylinder through a hydraulic control one-way valve and a balance valve in sequence by pipelines, the type of the hydraulic control one-way valve is a control pressure opening valve, a control oil port of the hydraulic control one-way valve is communicated with the main oil supply oil circuit and the main oil return oil circuit through an electromagnetic pilot valve, the pilot port of the balance valve is connected to the upper rod cavity of the mold opening and closing oil cylinder, and the working oil port B of the three-position four-way proportional valve is connected to the upper rod cavity of the mold opening and closing oil cylinder through a one-way valve through a pipeline; the hydraulic control valve further comprises an electromagnetic valve, one working port of the electromagnetic valve is connected to an oil way between the one-way valve and a rod cavity on the die opening and closing oil cylinder through a pipeline, and the other working port of the electromagnetic valve is connected to an oil way between the three-position four-way proportional valve and the hydraulic control one-way valve through a pipeline.
Compared with the prior art, the pressure of the balance valve can be completely reduced to load weight, the pilot pressure is enough to open the balance valve, the shaking of die assembly is effectively overcome, the energy storage of the lower cavity of the oil cylinder is reduced, the phenomenon of upward springing does not occur when the die assembly is stopped, and the problems of defects 1 and 3 in the prior art can be completely avoided; when the mold opening is stopped, the pressure of the upper rod cavity is unloaded through the electromagnetic valve and the middle position of the three-position four-way proportional valve, and the hydraulic control one-way valve is adopted, so that the cross beam is ensured not to fall, and the problem of defect 2 in the prior art can be completely avoided. The balance valve and the hydraulic control one-way valve establish a double safety protection function together, effectively prevent the cross beam from accidentally sliding down, improve the safety standard of equipment and meet the requirements of a CE secondary safety circuit.
Further, the electromagnetic valve is a normally open electromagnetic seat valve.
Furthermore, the middle position of the three-position four-way proportional valve is Y-shaped.
Further, the set pressure of the balance valve is slightly higher than the load weight of the corresponding die opening and closing oil cylinder.
Furthermore, the hydraulic control one-way valve adopts a cone valve structure.
By adopting the preferable scheme, the hydraulic control one-way valve adopts a cone valve structure form, the response time is short, the opening and closing are sensitive, and the positioning is accurate.
And furthermore, a displacement sensor for detecting the mold opening and closing position is further arranged on the vulcanizing machine, and a main controller of the vulcanizing machine receives a mold opening and closing position signal detected by the displacement sensor and sends out an instruction signal for controlling the opening proportion of the three-position four-way proportional valve after processing.
By adopting the preferable scheme, different die opening and closing speeds can be provided conveniently according to different die opening and closing position sections.
When the mold is closed, an electromagnet YV10C of an electromagnetic valve is electrified, the electromagnetic valve is closed, and a differential connection oil way is cut off; the electromagnet YV10B of the three-position four-way proportional valve is electrified, and high-pressure oil of a main oil supply path enters a rod cavity on the die opening and closing oil cylinder from a working oil port B of the three-position four-way proportional valve; an electromagnet YV10D of the electromagnetic pilot valve is electrified, high-pressure oil enters a control oil port of the hydraulic control one-way valve, the hydraulic control one-way valve is opened, and oil in a rodless cavity under the mold opening and closing oil cylinder flows back to the main oil return oil way through the balance valve, the hydraulic control one-way valve and the three-position four-way proportional valve;
when the die is opened, the electromagnet YV10C of the electromagnetic valve is de-energized, the electromagnetic valve is opened, and the differential connection oil way is conducted; an electromagnet YV10D of the electromagnetic pilot valve is electrified, high-pressure oil enters a control oil port of the hydraulic control one-way valve, and the hydraulic control one-way valve is opened; the electromagnet YV10A of the three-position four-way proportional valve is electrified, high-pressure oil of a main oil supply path enters a lower rodless cavity of the mold opening and closing oil cylinder from a working oil port A of the three-position four-way proportional valve sequentially through the hydraulic control one-way valve and the balance valve, and oil liquid in a rod cavity on the mold opening and closing oil cylinder sequentially enters the lower rodless cavity of the mold opening and closing oil cylinder through the electromagnetic valve, the hydraulic control one-way valve and the balance valve to realize differential mold opening.
By adopting the preferable scheme, differential die opening is effectively realized, the die opening speed is increased, and the production efficiency is improved. When the mold opening and closing control loop does not work, the pressure of the upper rod cavity can be unloaded through the electromagnetic valve and the three-position four-way proportional valve, and the stress safety of the oil cylinder is ensured.
Furthermore, the mold is opened and closed in a sectional way,
the mold closing stroke is divided into an upper-section high-speed mold closing stroke, a middle-section medium-speed mold closing stroke and a lower-section low-speed mold closing stroke,
in the upper-section high-speed die closing stroke, the opening of the three-position four-way proportional valve is set to be 100%;
in the middle-section medium-speed die closing stroke, the opening size of the three-position four-way proportional valve is set to be 53%;
in the lower-section low-speed die closing stroke, the opening of the three-position four-way proportional valve is set to be 30%;
the mold opening stroke is divided into a lower-section low-speed mold opening stroke, a middle-section high-speed mold opening stroke and an upper-section low-speed mold opening stroke,
in the lower-section low-speed die opening stroke, the opening of the three-position four-way proportional valve is set to 35%;
in the middle-section high-speed die opening stroke, the opening size of the three-position four-way proportional valve is set to be 100%;
in the upper-section low-speed die opening stroke, the opening of the three-position four-way proportional valve is set to be 30%.
By adopting the preferable scheme, the high speed and the low speed are organically combined, so that the mold opening and closing speed is improved, and the stability of the mold opening and closing is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic view of a segmented open-close mold embodiment of the present invention.
Names of corresponding parts represented by numerals and letters in the drawings:
1-a three-position four-way proportional valve; 2-a balancing valve; 3-opening and closing the mould oil cylinder; 4-a hydraulic control one-way valve; 5-electromagnetic pilot valve; 6-a one-way valve; 7-an electromagnetic valve; 9-vulcanizer crossbeam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
As shown in figure 1, the differentially controlled mold opening and closing control loop of the vulcanizing machine comprises a three-position four-way proportional valve 1, a balance valve 2 and a mold opening and closing oil cylinder 3, wherein a piston rod of the mold opening and closing oil cylinder 3 is connected with a cross beam 9 of the vulcanizing machine, an oil inlet P of the three-position four-way proportional valve 1 is connected with a main oil supply path of a hydraulic system, an oil return port T of the three-position four-way proportional valve 1 is connected with a main oil return path, a working oil port A of the three-position four-way proportional valve 1 sequentially passes through a hydraulic control one-way valve, the balance valve 2 is connected to a lower rodless cavity of the mold opening and closing oil cylinder 3, the type of the hydraulic control one-way valve 4 is a control pressure opening valve, a control oil port of the hydraulic control one-way valve 4 is communicated to a main oil supply oil way and a main oil return oil way through an electromagnetic pilot valve 5, a pilot port of the balance valve 2 is connected to an upper rod cavity of the mold opening and closing oil cylinder 3, and a working oil port B of the three-position four-way proportional valve 1 is connected to the upper rod cavity of the mold opening and closing oil cylinder 3 through a pipeline and a one-; the hydraulic mold opening and closing device further comprises an electromagnetic valve 7, one working port of the electromagnetic valve 7 is connected to an oil path between the check valve 6 and a rod cavity on the mold opening and closing oil cylinder 3 through a pipeline, and the other working port of the electromagnetic valve 7 is connected to an oil path between the three-position four-way proportional valve 1 and the hydraulic control check valve 4 through a pipeline.
The beneficial effect of adopting above-mentioned technical scheme is: the pressure of the balance valve 2 can be completely reduced to load weight, the pilot pressure is enough to open the balance valve 2, the mould closing shake is effectively overcome, the energy storage of the lower cavity of the mould opening and closing oil cylinder 3 is reduced, the phenomenon of upward ejection can not occur when mould closing is stopped, and the problems of defects 1 and 3 in the prior art can be completely avoided; when the mold opening is stopped, the pressure of the upper rod cavity is unloaded through the electromagnetic valve 7 and the middle position of the three-position four-way proportional valve 1, and the hydraulic control one-way valve 4 is adopted, so that the cross beam is ensured not to fall, and the problem of defect 2 in the prior art can be completely avoided. The balance valve 2 and the hydraulic control one-way valve 4 establish a double safety protection function together, the beam is effectively prevented from accidentally sliding down, the safety standard of the equipment is improved, and the requirement of a CE secondary safety circuit is met.
In other embodiments of the invention, the solenoid valve 7 is a normally open two-position, two-way solenoid seat valve.
In other embodiments of the invention, the middle position of the three-position, four-way proportional valve 1 is Y-shaped.
In other embodiments of the present invention, the set pressure of the balance valve is slightly higher than the load weight of the corresponding mold opening and closing cylinder, the heaviest load weight G is calculated by theory, and the pressure of the balance valve is set to (1-1.05) G.
In other embodiments of the present invention, the pilot operated check valve 4 is of a cone valve structure. The beneficial effect of adopting above-mentioned technical scheme is: when the electromagnetic pilot valve works, the electromagnet YV10D of the electromagnetic pilot valve 5 is electrified, high-pressure oil of the main oil supply oil way enters the control port of the hydraulic control one-way valve 4, and the hydraulic control one-way valve 4 is opened; when the work stops, the electromagnet YV10D of the electromagnetic pilot valve 5 loses power, the main oil return oil way is communicated with the control port of the hydraulic control one-way valve 4, and the hydraulic control one-way valve 4 only flows in one way to prevent the oil liquid of the lower rodless cavity from flowing back; the hydraulic control one-way valve adopts a cone valve structure form, has short response time, is sensitive to open and close and is accurate to position.
In other embodiments of the present invention, a displacement sensor for detecting an opening and closing mold position is further disposed on the vulcanizer, and a main controller of the vulcanizer receives a mold opening and closing position signal detected by the displacement sensor, processes the mold opening and closing position signal, and sends a command signal for controlling the opening ratio of the three-position four-way proportional valve. The beneficial effect of adopting above-mentioned technical scheme is: the convenience provides different mould opening and closing speeds according to different mould opening and closing position sections.
The following table is a table showing the operation states of the electromagnets of the respective hydraulic elements at the time of mold opening and closing, using the embodiment of fig. 1.
The mold opening and closing control method of the vulcanizing machine comprises the following steps:
when the die is closed, the electromagnet YV10C of the electromagnetic valve 7 is electrified, the electromagnetic valve is closed, and the differential connection oil way is cut off; the electromagnet YV10B of the three-position four-way proportional valve 1 is electrified, and high-pressure oil of a main oil supply path enters a rod cavity on the die opening and closing oil cylinder 3 from a working oil port B of the three-position four-way proportional valve 1; an electromagnet YV10D of the electromagnetic pilot valve 5 is electrified, high-pressure oil enters a control oil port of the hydraulic control one-way valve 4, the hydraulic control one-way valve 4 is opened, and the oil in the rodless cavity below the mold opening and closing oil cylinder 3 flows back to the main oil return oil way through the balance valve 2, the hydraulic control one-way valve 4 and the three-position four-way proportional valve 1;
when the die is opened, the electromagnet YV10C of the electromagnetic valve 7 is de-energized, the electromagnetic valve 7 is opened, and the differential connection oil way is conducted; an electromagnet YV10D of the electromagnetic pilot valve 5 is electrified, high-pressure oil enters a control oil port of the hydraulic control one-way valve 4, and the hydraulic control one-way valve 4 is opened; the electromagnet YV10A of the three-position four-way proportional valve 1 is electrified, high-pressure oil of a main oil supply path enters a lower rodless cavity of the mold opening and closing oil cylinder 3 from a working oil port A of the three-position four-way proportional valve 1 sequentially through the hydraulic control one-way valve 4 and the balance valve 2, oil liquid of an upper rod cavity of the mold opening and closing oil cylinder 3 sequentially enters a lower rodless cavity of the mold opening and closing oil cylinder 3 through the electromagnetic valve 7, the hydraulic control one-way valve 4 and the balance valve 2, and differential mold opening is achieved.
The beneficial effect of adopting above-mentioned technical scheme is: differential die opening is effectively realized, the die opening speed is increased, and the production efficiency is improved. When the mold opening and closing control loop does not work, the pressure of the upper rod cavity can be unloaded through the electromagnetic valve 7 and the middle position of the three-position four-way proportional valve 1, and the stress safety of the oil cylinder is ensured.
In other embodiments of the invention, as shown in fig. 2, a segmented open-close mold is implemented:
the mold closing stroke is divided into an upper-section high-speed mold closing stroke, a middle-section medium-speed mold closing stroke and a lower-section low-speed mold closing stroke,
in the upper-section high-speed die closing stroke, the opening of the three-position four-way proportional valve is set to be 100%;
in the middle-section medium-speed die closing stroke, the opening size of the three-position four-way proportional valve is set to be 53%;
in the lower-section low-speed die closing stroke, the opening of the three-position four-way proportional valve is set to be 30%;
the mold opening stroke is divided into a lower-section low-speed mold opening stroke, a middle-section high-speed mold opening stroke and an upper-section low-speed mold opening stroke,
in the lower-section low-speed die opening stroke, the opening of the three-position four-way proportional valve is set to 35%;
in the middle-section high-speed die opening stroke, the opening size of the three-position four-way proportional valve is set to be 100%;
in the upper-section low-speed die opening stroke, the opening of the three-position four-way proportional valve is set to be 30%.
The beneficial effect of adopting above-mentioned technical scheme is: the high speed and the low speed are organically combined, so that the mold opening and closing speed is improved, and the stability of the mold opening and closing is ensured.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (8)
1. A differentially controlled mold opening and closing control loop of a vulcanizing machine is characterized by comprising a three-position four-way proportional valve, a balance valve and a mold opening and closing oil cylinder, wherein a piston rod of the mold opening and closing oil cylinder is connected with a cross beam of the vulcanizing machine, an oil inlet P of the three-position four-way proportional valve is connected with a main oil supply circuit of a hydraulic system, an oil return port T of the three-position four-way proportional valve is connected with a main oil return circuit, a working oil port A of the three-position four-way proportional valve is connected to a lower rodless cavity of the mold opening and closing oil cylinder through a hydraulic control one-way valve and a balance valve in sequence by pipelines, the type of the hydraulic control one-way valve is a control pressure opening valve, a control oil port of the hydraulic control one-way valve is communicated with the main oil supply oil circuit and the main oil return oil circuit through an electromagnetic pilot valve, the pilot port of the balance valve is connected to the upper rod cavity of the mold opening and closing oil cylinder, and the working oil port B of the three-position four-way proportional valve is connected to the upper rod cavity of the mold opening and closing oil cylinder through a one-way valve through a pipeline; the hydraulic control valve further comprises an electromagnetic valve, one working port of the electromagnetic valve is connected to an oil way between the one-way valve and a rod cavity on the die opening and closing oil cylinder through a pipeline, and the other working port of the electromagnetic valve is connected to an oil way between the three-position four-way proportional valve and the hydraulic control one-way valve through a pipeline.
2. The differentially-controlled vulcanizer mold open and close control circuit according to claim 1, wherein the solenoid valve is a normally-open solenoid seat valve.
3. The differentially controlled vulcanizer mold open and close control circuit of claim 2 wherein said pilot operated check valve is of a cone valve construction.
4. The differentially-controlled vulcanizer mold open and close control circuit of claim 3, wherein the middle position of the three-position four-way proportional valve is Y-shaped.
5. The differentially controlled vulcanizer mold open and close control circuit of claim 4, wherein the set pressure of the balance valve is slightly higher than the load weight of the corresponding mold open and close cylinder.
6. The differential control vulcanizing machine mold opening and closing control loop as claimed in claim 1, wherein a displacement sensor for detecting the mold opening and closing position is further arranged on the vulcanizing machine, and the main controller of the vulcanizing machine receives the mold opening and closing position signal detected by the displacement sensor and sends out a command signal for controlling the opening ratio of the three-position four-way proportional valve after processing.
7. A mold opening and closing control method characterized by using the differentially controlled vulcanizer mold opening and closing control circuit according to any one of claims 1 to 6,
when the die is closed, the electromagnet YV10C of the electromagnetic valve is electrified, the electromagnetic valve is closed, and the differential connection oil way is cut off; the electromagnet YV10B of the three-position four-way proportional valve is electrified, and high-pressure oil of a main oil supply path enters a rod cavity on the die opening and closing oil cylinder from a working oil port B of the three-position four-way proportional valve; an electromagnet YV10D of the electromagnetic pilot valve is electrified, high-pressure oil enters a control oil port of the hydraulic control one-way valve, the hydraulic control one-way valve is opened, and oil in a rodless cavity under the mold opening and closing oil cylinder flows back to the main oil return oil way through the balance valve, the hydraulic control one-way valve and the three-position four-way proportional valve;
when the die is opened, the electromagnet YV10C of the electromagnetic valve is de-energized, the electromagnetic valve is opened, and the differential connection oil way is conducted; an electromagnet YV10D of the electromagnetic pilot valve is electrified, high-pressure oil enters a control oil port of the hydraulic control one-way valve, and the hydraulic control one-way valve is opened; the electromagnet YV10A of the three-position four-way proportional valve is electrified, high-pressure oil of a main oil supply path enters a lower rodless cavity of the mold opening and closing oil cylinder from a working oil port A of the three-position four-way proportional valve sequentially through the hydraulic control one-way valve and the balance valve, and oil liquid in a rod cavity on the mold opening and closing oil cylinder sequentially enters the lower rodless cavity of the mold opening and closing oil cylinder through the electromagnetic valve, the hydraulic control one-way valve and the balance valve to realize differential mold opening.
8. The mold opening and closing control method according to claim 7, wherein a segmented mold opening and closing is performed,
the mold closing stroke is divided into an upper-section high-speed mold closing stroke, a middle-section medium-speed mold closing stroke and a lower-section low-speed mold closing stroke,
in the upper-section high-speed die closing stroke, the opening of the three-position four-way proportional valve is set to be 100%;
in the middle-section medium-speed die closing stroke, the opening size of the three-position four-way proportional valve is set to be 53%;
in the lower-section low-speed die closing stroke, the opening of the three-position four-way proportional valve is set to be 30%;
the mold opening stroke is divided into a lower-section low-speed mold opening stroke, a middle-section high-speed mold opening stroke and an upper-section low-speed mold opening stroke,
in the lower-section low-speed die opening stroke, the opening of the three-position four-way proportional valve is set to 35%;
in the middle-section high-speed die opening stroke, the opening size of the three-position four-way proportional valve is set to be 100%;
in the upper-section low-speed die opening stroke, the opening of the three-position four-way proportional valve is set to be 30%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910762625.4A CN112412903A (en) | 2019-08-21 | 2019-08-21 | Differentially-controlled mold opening and closing control loop and mold opening and closing control method for vulcanizing machine |
| PCT/CN2019/120804 WO2021031436A1 (en) | 2019-08-21 | 2019-11-26 | Differential control mold opening and closing control loop of vulcanizing machine and mold opening and closing control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910762625.4A CN112412903A (en) | 2019-08-21 | 2019-08-21 | Differentially-controlled mold opening and closing control loop and mold opening and closing control method for vulcanizing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112412903A true CN112412903A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910762625.4A Pending CN112412903A (en) | 2019-08-21 | 2019-08-21 | Differentially-controlled mold opening and closing control loop and mold opening and closing control method for vulcanizing machine |
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| CN (1) | CN112412903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022228257A1 (en) * | 2021-04-30 | 2022-11-03 | 萨驰智能装备股份有限公司 | Integrated hydraulic system and tire vulcanizing machine |
-
2019
- 2019-08-21 CN CN201910762625.4A patent/CN112412903A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022228257A1 (en) * | 2021-04-30 | 2022-11-03 | 萨驰智能装备股份有限公司 | Integrated hydraulic system and tire vulcanizing machine |
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