CN210525399U - Control system of plate blank prepressing machine - Google Patents
Control system of plate blank prepressing machine Download PDFInfo
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- CN210525399U CN210525399U CN201821641794.XU CN201821641794U CN210525399U CN 210525399 U CN210525399 U CN 210525399U CN 201821641794 U CN201821641794 U CN 201821641794U CN 210525399 U CN210525399 U CN 210525399U
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- pressure sensor
- solenoid valve
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Abstract
The utility model discloses a control system of a slab pre-pressing machine; the hydraulic oil pump obtains hydraulic oil from an oil tank, and the front electromagnetic valve, the middle electromagnetic valve, the rear electromagnetic valve, the front pressure sensor, the middle pressure sensor and the rear pressure sensor are respectively electrically connected with an electric control device. The utility model discloses can solve because electric contact pressure gauge is malfunctioning easily and pressure setting is inconvenient, make the unstable problem that influences manufacturing cost of pre-compaction pressure.
Description
Technical Field
The utility model belongs to the technical field of the panel processing technique and specifically relates to a control system for slab preformer.
Background
The prepress is an important device on a medium-density fiberboard production line, and the running stability and precision of the prepress directly affect the quality of products and the consumption of raw materials, so that the production cost is affected.
The working principle of the medium-density fiberboard prepressing system (figure 1) is briefly described as follows: according to the specification of a product to be produced, certain fibers fall from the fiber bin, the fibers with a preset height are paved in the paving bin, and the fibers in the paving bin are conveyed into the prepress through the paving net belt to be compressed and exhausted and then enter the next procedure. Prepressing is the process of pressing the formed loose slab to a degree of compaction at room temperature. The air that the pre-compaction was stayed in the discharge slab reduces slab thickness to reduce opening of press clamp plate, shorten hot pressing cycle, improve press production efficiency, prevent that the solidification layer from appearing. The pre-pressed plate blank can have a faster closing speed, the strength of the plate blank is increased, and therefore the plate blank is favorable for transportation, the operation without a base plate is realized, the fluidity of glue solution is increased, and the gluing quality is ensured. The slabs are pre-pressed in a cold press, the degree of compression being mainly determined by the pressure of the press. The slab fully exhausted through the pre-compaction can improve transportation quality and speed, and influences the plate making effect of the pressing machine.
The products with certain specifications have certain pavement thickness, the pressure setting of the prepressing machine is basically unchanged, three pressure maintaining roller oil cylinders, namely a front pressure maintaining roller oil cylinder, a middle pressure maintaining roller oil cylinder and a rear pressure maintaining roller oil cylinder, are controlled by three electric contact pressure gauges (14, 15 and 16 in figure 1), the three oil cylinders share one hydraulic oil pump for supplying oil, the hydraulic oil pump always works during production, the three oil cylinders ascend or descend and are controlled by the fact that the three oil cylinders lose power through a group of electromagnetic valves, and pressure instability can also be caused due to the fact that the electric contact pressure gauges are easy to fail and the pressure setting is inconvenient.
The fundamental reason for the overlarge thickness fluctuation of the pre-pressed plate blank is that the pre-pressing pressure is unstable, a pre-pressing belt with the overlarge pre-pressing pressure slips to easily cause halt, and the plate blank is easy to spray fibers to cause raw material waste and influence the environment; if the pressure is too low, the slab is easy to crack, the product quality is reduced, and if the cracked slab is recycled, electric energy is wasted, and the production cost is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a slab pre-compaction machine control system, it can solve because electric contact pressure gauge is out of order easily and pressure setting is inconvenient, makes the unstable problem that influences manufacturing cost of pre-compaction pressure.
In order to solve the above problem, the utility model discloses a technical scheme is: the control system of the plate blank prepressing machine comprises a prepress, wherein a paving mesh belt is arranged at the front end of the prepress, a paving scale is arranged between the prepress and the paving mesh belt, a front roller, a middle roller and a rear roller are arranged on the prepress, and the front roller, the middle roller and the rear roller are respectively connected with outlet ends of a front electromagnetic valve, a middle electromagnetic valve and a rear electromagnetic valve through pipelines, and the control system is characterized in that: preceding pressure sensing, well pressure sensor and back pressure sensor are equipped with respectively on the pipeline of the exit end of preceding solenoid valve, well solenoid valve and back solenoid valve, the entrance point and the hydraulic oil pump connection of preceding solenoid valve, well solenoid valve and back solenoid valve, hydraulic oil pump acquires hydraulic oil from the oil tank, hydraulic oil pump is by motor control work, preceding solenoid valve, well solenoid valve and back solenoid valve and preceding pressure sensing, well pressure sensor and back pressure sensor still the motor is connected with the electrically controlled device electricity respectively.
In the above technical solution, a more specific technical solution is: the electric control device is provided with a frequency converter.
Further: the front electromagnetic valve, the middle electromagnetic valve and the rear electromagnetic valve are all 4we6u50/ag24nz5L type electromagnetic valves.
Further: the front pressure sensor, the middle pressure sensor and the rear pressure sensor are DGI300-BZ-B-2-10 type sensors.
Further: the frequency converter is an FRN5.5G11S-4cx type frequency converter.
Since the technical scheme is used, compared with the prior art, the utility model, the beneficial effect who has is: because the utility model discloses a pressure sensor, because pressure sensor reliability is higher, so the pressure energy of system remains stable, because can set up the pressure value on electrically controlled device again, so, the pressure value setting has made things convenient for.
Drawings
Fig. 1 is a schematic view of a prior art structure.
Fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples:
the control system of the slab pre-press shown in fig. 2 comprises a pre-press, a paving mesh belt 2 is arranged at the front end of the pre-press 1, a paving scale 3 is arranged between the pre-press 1 and the paving mesh belt 2, a front roller 1-1, a middle roller 1-2 and a rear roller 1-3 are arranged on the pre-press 1, the front roller 1-1, the middle roller 1-2 and the rear roller 1-3 are respectively connected with the outlet ends of a front electromagnetic valve 7, a middle electromagnetic valve 8 and a rear electromagnetic valve 9 through pipelines, a front pressure sensor 4, a middle pressure sensor 5 and a rear pressure sensor 6 are respectively arranged on the pipelines at the outlet ends of the front electromagnetic valve 7, the middle electromagnetic valve 8 and the rear electromagnetic valve 9, the inlet ends of the front electromagnetic valve 7, the middle electromagnetic valve 8 and the rear electromagnetic valve 9 are connected with a hydraulic oil pump 10, the hydraulic oil pump 10 obtains hydraulic oil from an oil tank 13, the, The middle electromagnetic valve 8, the rear electromagnetic valve 9, the front pressure sensor 4, the middle pressure sensor 5, the rear pressure sensor 6 and the motor 11 are respectively electrically connected with an electric control device 12.
In the present embodiment, the electric control device 12 is provided with an FRN5.5G11S-4cx type frequency converter; the front electromagnetic valve 7, the middle electromagnetic valve 8 and the rear electromagnetic valve 9 are all 4we6u50/ag24nz5L type electromagnetic valves; the front pressure sensor 4, the middle pressure sensor 5 and the rear pressure sensor 6 are DGI300-BZ-B-2-10 type sensors.
Before the prepressing device starts to work, a pressure value is set on the frequency converter, the prepressing device 1 works according to the set pressure value, the pressure is always kept at a set value, and the pressure of the prepressing device 1 is stable.
The system runs after a period of time, the equipment runs normally, and the checking result is as follows: height comparison before and after slab prepressing
Table 1 comparison of the prior art of the pre-pressing control system with the thickness variation of the slab of the system
By analysing the table above (taking the 18mm product as an example) it can be concluded that: in the prior art, the maximum height of a plate blank is 90mm, the minimum height is 82mm, the requirement is 85mm, and the maximum deviation is 5 mm; the maximum height of the plate blank of the system is 87mm, the minimum height is 83mm, the requirement is 85mm, the maximum deviation is 2mm, and the thickness of the system is uniform after pre-pressing.
Normal production is according to the record contrast, and prior art takes place almost every day that every month has about 30 precompression belt phenomena of skidding to take place, and the belt skids and causes the slab to draw and splits easily, draws and splits the slab and then influences product quality if not discover to get into the press in time, if reach discovery feed back then both extravagant electric energy and influence production speed. The system hardly generates the phenomenon of belt slip, and occasionally the slip is caused by the condition that the paving quality is poor and the plate blank is ultrahigh.
Cost and benefit
TABLE 2 Pre-compaction control System retrofit cost
From table 2, it can be seen that the cost of retrofitting the present system to the prior art is about 0.6 ten thousand dollars. The phenomenon that the prepressing belt slips about 30 times every month in the prior art before transformation occurs, and the phenomenon that the prepressing belt slips is hardly caused in the system after transformation.
The number of defective products due to the pre-pressed belt slip is counted each year as 2 defective products per belt slip (one year in 18mm products for 11 months of production): 30/month x 11 month x 2 pieces/time =660 pieces.
The yield of each product is reduced from superior products to inferior products, and the yield is reduced according to the calculation of 25 yuan/piece, namely 60 yuan/piece × 25 yuan/piece =16500 yuan.
Because the slab recycling fan is used for recycling the slabs for about 10 minutes each time, the running time of the motor is short, and the electric quantity is saved relatively little without calculation.
The data analysis shows that compared with the prior art, the system has the advantages that the operation efficiency of the equipment is improved, and the quality of products is improved.
Claims (6)
1. The utility model provides a slab pre-press machine control system, includes the pre-press the front end of pre-press is equipped with the guipure of mating formation the pre-press with be equipped with the scale of mating formation between the guipure of mating formation, be equipped with preceding roller, well roller and back roller on the pre-press, preceding roller, well roller and back roller pass through the pipeline and are connected its characterized in that with the exit end of preceding solenoid valve, well solenoid valve and back solenoid valve respectively: the utility model provides a hydraulic pump, hydraulic pump are by motor control work, preceding solenoid valve, well solenoid valve and back solenoid valve and preceding pressure sensing, well pressure sensor and back pressure sensor still the motor is connected with the electrically controlled device electricity respectively that be equipped with preceding pressure sensing, well pressure sensor and back pressure sensor on the pipeline respectively, the entrance point and the hydraulic pump of preceding solenoid valve, well solenoid valve and back solenoid valve are connected, hydraulic pump acquires hydraulic oil from the oil tank, hydraulic pump is by motor control work, preceding solenoid valve, well solenoid valve and back solenoid valve and preceding pressure sensing, well pressure sensor.
2. The slab precompressor control system according to claim 1, characterized in that: the electric control device is provided with a frequency converter.
3. The slab precompressor control system according to claim 1 or 2, characterized in that: the front electromagnetic valve, the middle electromagnetic valve and the rear electromagnetic valve are all 4we6u50/ag24nz5L type electromagnetic valves.
4. The slab precompressor control system according to claim 1 or 2, characterized in that: the front pressure sensor, the middle pressure sensor and the rear pressure sensor are DGI300-BZ-B-2-10 type sensors.
5. The slab precompressor control system according to claim 2, characterized in that: the frequency converter is an FRN5.5G11S-4cx type frequency converter.
6. The slab precompressor control system according to claim 3, characterized in that: the front pressure sensor, the middle pressure sensor and the rear pressure sensor are DGI300-BZ-B-2-10 type sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821641794.XU CN210525399U (en) | 2018-10-10 | 2018-10-10 | Control system of plate blank prepressing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821641794.XU CN210525399U (en) | 2018-10-10 | 2018-10-10 | Control system of plate blank prepressing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210525399U true CN210525399U (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821641794.XU Active CN210525399U (en) | 2018-10-10 | 2018-10-10 | Control system of plate blank prepressing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210525399U (en) |
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2018
- 2018-10-10 CN CN201821641794.XU patent/CN210525399U/en active Active
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Address after: 543000 No.81 Tangyuan Road, Wuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Sanwei home new material Co.,Ltd. Address before: 543000 No.81 Tangyuan Road, Wuzhou City, Guangxi Zhuang Autonomous Region Patentee before: GUANGXI SUNWAY FOREST PRODUCTS INDUSTRY Co.,Ltd. |