CN116393012A - Silicone rubber compounding machine and compounding method - Google Patents

Silicone rubber compounding machine and compounding method Download PDF

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Publication number
CN116393012A
CN116393012A CN202310227150.5A CN202310227150A CN116393012A CN 116393012 A CN116393012 A CN 116393012A CN 202310227150 A CN202310227150 A CN 202310227150A CN 116393012 A CN116393012 A CN 116393012A
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China
Prior art keywords
glue
main
rubber
pipe
valve
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CN202310227150.5A
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Chinese (zh)
Inventor
周芳
段谦
金景一
左俐娜
施梅
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Yunnan North Olightek Opto Electronic Technology Co ltd
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Yunnan North Olightek Opto Electronic Technology Co ltd
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Priority to CN202310227150.5A priority Critical patent/CN116393012A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/181—Preventing generation of dust or dirt; Sieves; Filters
    • B01F35/187—Preventing generation of dust or dirt; Sieves; Filters using filters in mixers, e.g. during venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2212—Level of the material in the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • B01F35/718051—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/36—Mixing of ingredients for adhesives or glues; Mixing adhesives and gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The silicone rubber preparation machine comprises a frame, wherein a main material rubber supply system, an auxiliary material rubber supply system and a stirring and mixing system are sequentially arranged on the frame; the main material glue supply system comprises a main material barrel, a double-bellows type feed pump and a main circulation device; the double-bellows type feeding pump comprises a cylinder, valve heads, pistons and cylinder sleeves are symmetrically arranged on the left side and the right side of the cylinder, a discharge valve and a feeding valve are connected to the cylinder sleeve, the feeding valve is connected with a glue outlet of a main material barrel through a rubber pipe, and the discharge valve is connected with a stirring and mixing system; the auxiliary material glue supply system comprises an auxiliary material barrel, and a glue outlet of the auxiliary material barrel is connected with the stirring and mixing system. The method for dispensing glue by using the glue dispensing machine can accurately measure through the sensor, realize accurate material dispensing of each glue, realize accurate control of glue dispensing proportion within a range of 10:1, and simultaneously effectively and stably perform glue defoaming for a long time in a constant vacuum environment, thereby greatly improving glue injection performance of the glue.

Description

Silicone rubber compounding machine and compounding method
Technical Field
The invention belongs to the field of electronic product sealing and assembling glue, and particularly relates to a silicone rubber dispensing machine and a using method thereof.
Background art when packaging the silicon wafer in the OLED micro-display, a double-component silicon rubber is needed, usually a Dow Corning SYLGARD 184 silicon rubber is used, wherein the silicon rubber comprises a basic component and a curing agent, the basic component and the curing agent are required to be completely mixed according to the weight ratio of 10:1, the allowable error is two bits after decimal point, the control is very strict, and the vacuum operation is required to be carried out, so that no air residue exists in the glue, the glue forming is required to be used within 90 minutes, and the mobility of the glue is greatly reduced beyond the time and can not be used on the soft package of the product.
At present, the best glue preparation machine in the market can only achieve 8:1 or even lower, the proportion of the large-component glue required by production cannot be accurately controlled to be 10:1, and the vacuum operation cannot be realized, so that a large amount of air is mixed in the glue mixing process, the glue forming quality is poor, the glue forming quality cannot be ensured, and the production requirement cannot be met.
Disclosure of Invention
In order to meet the vacuum glue dispensing environment and enable the precise proportion to be precisely controlled at 10:1, the invention provides a silicone rubber glue dispensing machine and a glue dispensing method.
The silicone rubber preparation machine comprises a frame and is characterized in that a main material rubber supply system, an auxiliary material rubber supply system and a stirring and mixing system are sequentially arranged on the frame; the main material glue supply system comprises a main material barrel, a double-bellows type feed pump and a main circulation device; the double-bellows type feeding pump comprises a cylinder, valve heads, pistons and cylinder sleeves are symmetrically arranged on the left side and the right side of the cylinder, an oil window is arranged on the front side of the cylinder, a discharge valve and a feeding valve are connected to the cylinder sleeve, the feeding valve is connected with a glue outlet of a main material barrel through a rubber pipe, and the discharge valve is connected with a stirring and mixing system; the auxiliary material glue supply system comprises an auxiliary material barrel, and a glue outlet of the auxiliary material barrel is connected with the stirring and mixing system.
The main material glue supply system further comprises a main glue pump and a main circulating device, wherein the main glue pump, a stirrer driven by a motor, a main negative pressure pump with a release valve, a main material liquid level sensor, a pressure sensor and an observation window are fixedly arranged on a main glue pump barrel cover respectively, the main glue pump is connected with a main material pipe through a first valve, and a filter plug is arranged at the pipe head of the main material pipe; the bottom of the main charging basket body is provided with a glue outlet and is connected with a feed valve of a double-bellows type feed pump through a second valve; the main circulating device is composed of a first filter and a second filter, wherein the first filter is provided with a glue inlet and two glue outlets, the glue inlet is connected with a discharge valve of the double-bellows type feed pump through a rubber pipe, one glue outlet is communicated with the stirring and mixing system, the other glue outlet is connected with the glue inlet of the second filter through the rubber pipe, and the glue outlet of the second filter is connected with the main glue pump through the rubber pipe.
The auxiliary material glue supply system further comprises an auxiliary glue pump, an auxiliary negative pressure pump and a third filter, wherein an auxiliary material pipe, an auxiliary material liquid level sensor and an auxiliary negative pressure pump with a pressure release valve are arranged at the position of a cover of the auxiliary material barrel, a filter plug is arranged at a pipe head of the auxiliary material pipe, and the auxiliary material barrel is connected with the auxiliary glue pump through a rubber pipe; the bottom of the auxiliary material barrel is connected with a glue inlet of the third filter through a glue pipe, and a glue outlet of the third filter is connected with a stirring and mixing system through a glue pipe.
The stirring and mixing system comprises a fixed support, a servo motor, a planetary reducer, a glue storage area and a glue mixing pipe, wherein the planetary reducer is arranged at the top of the fixed support, the servo motor is arranged on the planetary reducer, a sensor is arranged in the middle of the fixed support, the glue storage area is arranged at the bottom of the fixed support and consists of a mounting plate, a glue outlet nozzle, a diaphragm and a material storage valve, a main material feed pipe orifice and an auxiliary material feed pipe orifice are respectively arranged at the left side and the right side of the mounting plate, the diaphragm is arranged at the front side of the mounting plate, the material storage valve is arranged on the diaphragm, a pipeline is arranged in the mounting plate and is communicated with the main material feed pipe orifice and the material storage valve inlet, the glue outlet nozzle is arranged at the bottom of the mounting plate, and the material outlet of the material storage valve is communicated with the glue outlet nozzle; and a rubber mixing pipe is arranged below the rubber outlet nozzle.
The storage valve consists of a storage cabin body, a piston rod, a feeding switch, a discharging switch and a storage valve observation window, wherein the piston rod is arranged in the storage cabin body, the piston rod is electrically connected with the servo motor and the sensor, and the storage valve observation window is arranged on the front side of the storage cabin body; the storage valve comprises a main storage valve and an auxiliary storage valve, the main storage valve and the auxiliary storage valve are identical in structure, are symmetrically installed, correspond to corresponding feeding systems in installation positions, and have a volume of 10:1.
The silicone rubber dispensing machine further comprises a control system, wherein the control system is electrically connected with each part of the main material rubber supply system, the curing agent supply system and the stirring and mixing system.
A method for preparing silicone rubber is characterized by comprising the following steps:
s1: opening a first valve, sucking the main material A glue into a main material barrel through a main material pipe, and continuously stirring the main material A glue in the main material barrel for defoaming treatment;
the A glue after bubble removal is pumped into the first filter through a double-bellows type feeding pump, and two discharging pipes of the double-bellows type feeding pump can supply glue to the first filter uninterruptedly;
s2: opening a second valve, sucking the adhesive A into a double-bellows type feed pump, regularly and alternately sucking the adhesive A into a first filter from two discharge valves 125 for filtering, then sucking the adhesive A into a second filter for filtering, and sucking the adhesive A into a main material barrel again after the completion of the filtering process to complete the whole circulating filtering process;
s3: sucking the curing agent B glue into the auxiliary material barrel through the auxiliary material pipe, and directly feeding the B glue into a third filter from a discharge hole of the auxiliary material barrel for filtering;
s4: after the filtering process of the glue A and the glue B is finished, a feed switch is turned on, the glue A enters the main storage valve through the main material feeding pipe opening, the glue B enters the auxiliary storage valve through the auxiliary material feeding pipe opening, and at the moment, the discharge switch is turned off. When the sensor monitors that the two storage valves are full of glue and the ratio of glue to glue is 10:1, a signal is transmitted to the control system to open the discharge switch, the servo motor is started to drive the piston rod to push the glue A and the glue B respectively, the glue A and the glue B flow into the glue mixing pipe from the glue outlet nozzle, the glue mixing pipe rotates at a constant speed, the glue A and the glue B are fully mixed, and the glue distribution is completed from the pipe head flow of the mixed glue.
And in the S1 process, monitoring the A glue liquid level in the barrel by a main liquid level sensor, wherein the liquid level value is lower than the set alarm liquid level, and the main liquid level sensor gives a signal to prompt manual feeding until the set liquid level upper limit value is reached.
The cylinder on the double bellows type feed pump in the S2 process regularly and uninterruptedly moves left and right circularly in the feeding process, so that the glue A flows out alternately from the two discharge holes, the glue components at all positions are uniform, and the glue deposited on the pipe wall is continuously washed and dissolved.
And S3, monitoring the glue liquid level B in the barrel by using an auxiliary material liquid level sensor in the process, wherein the liquid level value is lower than the set alarm liquid level, and giving a signal by using the auxiliary material liquid level sensor to prompt manual feeding until the set liquid level upper limit value is reached.
The invention has the beneficial effects that:
firstly, the stirring and mixing system is matched with a control system to form an automatic system with fixed proportion and fixed quantity, after the main material glue A and the auxiliary material glue B enter the stirring and mixing system through respective pipelines, accurate metering is carried out through a sensor, accurate material beating of each glue is realized, and accurate control of the glue mixing proportion is realized within a range of 10:1.
Secondly, the whole glue dispensing machine is in a high vacuum environment, so that the influence of the external environment on the glue is eliminated, and the glue which is easy to react with air or easily absorb air moisture is protected in a sealing way. Therefore, preferential conditions are created for high-quality glue injection, and even the conditions are indispensable for certain types of glue. Meanwhile, the constant vacuum environment can effectively and stably carry out glue defoaming for a long time, so that air and water vapor in the glue can be removed in the process of packaging, and the glue injection performance of the glue is greatly improved.
Thirdly, the double corrugated pipe type feeding pump can exchange liquid in the material barrel and the pipeline with glue, and can homogenize the glue which is easy to precipitate by combining an automatic stirring function, so that uneven glue outlet and layering of the glue are avoided.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a silicone rubber dispenser.
Fig. 2 is a schematic structural view of the main barrel.
FIG. 3 is a schematic diagram of a dual bellows feed pump.
Fig. 4 is a schematic diagram of the structure of the auxiliary material barrel.
Fig. 5 is a schematic diagram of a stirring and mixing system.
Wherein, 1-main material glue supply system, 11-main material barrel, 12-double bellows type feed pump, 121-cylinder, 122-valve head, 123-piston, 124-cylinder sleeve, 125-discharge valve, 126-feed valve, 127-oil window, 13-main glue pump, 14-first valve, 15-main material pipe, 16-stirring pipe, 17, stirring motor, 18-stirring blade, 19 second valve, 110-first filter, 111-second filter, 112-main negative pressure pump, 113-main liquid level sensor, 114-pressure sensor, 115-observation window, 2-auxiliary material glue supply system, 21-auxiliary material barrel, 22-auxiliary glue pump, 23-third filter, 24-auxiliary material pipe, 25-auxiliary material liquid level sensor, 26-auxiliary negative pressure valve, 3-stirring and mixing system, 31-fixed support, 32-servo motor, 33-planetary reducer, 34-glue storage area, 341-mounting plate, 342-glue outlet nozzle, 343-diaphragm, 344-storage valve, 3441-storage cabin, 3442-piston rod, 3443-feed switch, 3444-discharge switch, 35-glue mixing pipe, 36-sensor, 4-frame and 5-control system.
Detailed Description
Example 1: the Dow Corning SYLGARD 184 silicone rubber is a two-component kit product consisting of liquid components, and comprises main materials of adhesive A and curing agent of adhesive B, wherein the adhesive A and the adhesive B are required to be completely mixed according to the weight ratio of 10:1, and the adhesive preparation operation is required to be completed in a vacuum environment in the whole process. For making automatic glue preparation process more accurate, use to a silicone rubber glue preparation machine, including installing main material confession gluey system 1, auxiliary material confession gluey system 2, stirring material mixing system 3 and control system 5 in rack 4, and main material confession gluey system 1, auxiliary material confession gluey system 2, stirring material mixing system 3 are connected with control system 5 electricity respectively, and signal input goes out ETHERNET IP agreement and communicates, inputs the setting value in the control system, sets for the operating parameter of all sensors, servo motor and pump.
Wherein, the main material glue supply system 1 comprises a main material barrel 11, a double-bellows type feed pump 12 and a main circulation device. The double-bellows type feed pump 12 comprises an air cylinder 121, valve heads 122, pistons 123 and cylinder sleeves 124 are symmetrically arranged on the left side and the right side of the air cylinder 121, an oil window 127 is arranged on the front side of the air cylinder 121, a discharge valve 125 and a feed valve 126 are connected to the cylinder sleeves 124, the two feed valves 126 are connected with a glue outlet of a main material barrel 11 through a glue pipe, and the discharge valve 126 is connected to a stirring and mixing system 3 through a glue pipe; the auxiliary material glue supply system 2 comprises an auxiliary material barrel 21, and a glue outlet of the auxiliary material barrel 21 is connected with the stirring and mixing system 3.
The volume of the main material barrel 11 is 5L, the main material barrel 11 comprises a barrel body and a barrel cover, the barrel body and the barrel cover are fixedly covered by bolts, a mounting hole is formed in the barrel cover, a main glue pump 13 is fixed on the barrel cover by the mounting hole and is communicated with the barrel interior, the main glue pump 13 is connected with a main material pipe 15 by a first valve 14, and a filter plug is arranged at the pipe head of the main material pipe 15; the center of the barrel cover is provided with a stirring pipe 16 in a penetrating way, the top of the stirring pipe 16 is provided with a stirring motor 17 for driving, the stirring pipe 16 stretches into the main barrel and is provided with a stirring blade 18, and a main negative pressure pump 112 with a release valve is fixed on the barrel cover through a mounting hole; the bottom of the barrel body is provided with a glue outlet and is connected with two feed valves 126 of the double bellows type feed pump through a second valve 19. The main liquid level sensor 113, the pressure sensor 114 and the observation window 115 are fixedly installed on the installation hole on the barrel cover, the main liquid level sensor 113 stretches into and is installed in the main material barrel 11, and the observation window 115 is made of high-strength transparent materials and is symmetrically arranged on the barrel cover of the main material barrel 11. The main circulation device is composed of a first filter 110 and a second filter 111, the first filter 110 is provided with a glue inlet and two glue outlets, the glue inlet is connected with a discharge valve 125 of the double-bellows type feed pump 12 through a rubber pipe, one glue outlet is communicated with the stirring and mixing system, the other glue outlet is connected with the glue inlet of the second filter 111 through a rubber pipe, and the glue outlet of the second filter 111 is connected with the main glue pump 13 through a rubber pipe.
The auxiliary material glue supply system 2 comprises an auxiliary material barrel 21, an auxiliary glue pump 22, an auxiliary negative pressure pump 26 and a third filter 23, wherein the volume of the auxiliary material barrel 21 is 500ml, an auxiliary material pipe 24, an auxiliary material liquid level sensor 25 and the auxiliary negative pressure pump 22 with a pressure release valve are connected at the barrel cover, a filter plug is arranged at the pipe head of the auxiliary material pipe 24, and the auxiliary material barrel 21 is connected with the auxiliary glue pump 22 through a rubber pipe; the bottom of the auxiliary material barrel 21 is connected with a glue inlet of a third filter 23 through a glue pipe, and a glue outlet of the third filter 23 is connected with the stirring and mixing system 3 through a glue pipe.
The stirring and mixing system 3 comprises a fixed support 31, a servo motor 32, a planetary reducer 33, a glue storage area 34 and a glue mixing pipe 35, wherein the planetary reducer 33 is arranged at the top of the fixed support 31, the servo motor 32 is arranged on the planetary reducer 33, and a sensor 36 is arranged in the middle of the fixed support 31. The bottom of the fixed support 31 is provided with a glue storage area 34, the glue storage area 34 is composed of a mounting plate 341, a glue outlet 342, a membrane 343 and a storage valve 344, the left side and the right side of the mounting plate 341 are respectively provided with a main material supply pipe orifice and an auxiliary material supply pipe orifice, the glue outlet of a first filter is connected with the main material supply pipe orifice through a rubber pipe, the glue outlet of a third filter is connected with the auxiliary material supply pipe orifice through a rubber pipe, the membrane 343 is arranged at the front side of the mounting plate 341, the storage valve 344 is arranged on the membrane 343, the storage valve 344 is composed of a storage cabin 3441, a piston rod 3442, a feed switch 3443 and a storage valve observation window, the piston rod 3442 is arranged in the storage cabin 3441, the piston rod 3442 is electrically connected with the servo motor 32 and the sensor 36, and the storage valve observation window is arranged at the front side of the storage cabin 3441; the storage valve 344 comprises a main storage valve and an auxiliary storage valve, the main storage valve and the auxiliary storage valve have the same structure, are symmetrically installed, correspond to the corresponding feeding systems in installation positions, and have the volume of 10:1. A pipeline is arranged in the mounting plate 341 and is respectively communicated with a main material supply pipe orifice and a main material storage valve, an auxiliary material supply pipe orifice and an auxiliary material storage valve, a glue outlet nozzle 342 is arranged at the bottom of the mounting plate 341, and the main material storage valve and the auxiliary material valve are jointly connected with the glue outlet nozzle 342; a rubber mixing pipe 35 is arranged below the rubber outlet nozzle 342.
The specific compounding method of the Dow Corning SYLGARD 184 silicone rubber is as follows:
firstly, setting technical parameters of a main glue pump and an auxiliary glue pump in a main material glue supply system 1 and an auxiliary material glue supply system 2, wherein the air extraction speed is 2L/s, the lowest vacuum value is 2mbar, and the origin minimum pressure is 6bar; secondly, setting parameter values of the stirring and mixing system 3, wherein the maximum glue injection speed is not more than 5ml/s, the proportion precision of AB glue is 2%, and the repetition precision of glue injection quantity is 2%.
After the parameters are set, the method comprises the following steps:
s1: the first valve 14 is opened, the main material A glue is sucked into the main material barrel 11 from the glue in the raw material through the main material pipe 15, and the filter plug on the main material pipe 11 can be used for filtering for the first time. The main negative pressure pump 112 continuously pumps air in the main material barrel 11 to form a vacuum environment in the barrel, and the glue A in the main material barrel 11 passes through the glue plate to enable a steam drum in the glue to escape and float upwards in the vacuum environment in an accelerating way to realize defoamation; during the period, the main liquid level sensor 113 monitors the A glue liquid level in the barrel, the liquid level value is lower than the set alarm liquid level, the main liquid level sensor 113 gives out a signal to prompt manual feeding until the set liquid level upper limit value is reached, and the circulation ensures long-term stable feeding without stopping the machine for material replacement; the condition of the glue in the main vat 11 can be monitored manually through the observation window 115.
S2: after the defoaming preprocessing is finished, the second valve 19 is opened, the A glue is pumped into the double-bellows type feed pump through the two feed valves 126, the air cylinders regularly circulate continuously, so that the A glue is regularly and respectively pumped into the first filter 110 from the two discharge valves 125 alternately for second filtering, then pumped into the second filter for third filtering, and finally pumped into the main material barrel 11 again to complete the whole circulating filtering process, and the reciprocating circulating filtering is carried out for 30 minutes.
S3: the curing agent B glue is pumped into the auxiliary material barrel 21 from the glue in the raw material pipe through the auxiliary material pipe 24, a filter plug on the auxiliary material pipe 21 can be used for filtering for the first time, and the auxiliary negative pressure pump 26 is used for pumping air in the auxiliary material barrel 21, so that a vacuum environment is formed in the barrel; the auxiliary material liquid level sensor 25 monitors the liquid level of the B glue in the barrel, the liquid level value is lower than the set alarm liquid level, the auxiliary material liquid level sensor 25 gives out a signal to prompt manual feeding until the upper limit value of the set liquid level is reached, and the long-term stable feeding is ensured by circulation without stopping the machine for material replacement; since the B glue is a catalyst and the dosage is small, the defoaming treatment is not needed, and the B glue directly enters the third filter 23 from the discharge hole of the auxiliary material barrel 21 for the second filtering.
S4: after the filtering process of the glue A and the glue B is finished, the feeding switch 3443 is opened, the glue A enters the main storage valve through the main material feeding pipe opening, the glue B enters the auxiliary storage valve through the auxiliary material feeding pipe opening, the discharging switch 3444 is closed at the moment, and the glue storage amounts of the glue A and the glue B can be observed through windows on the two storage valves 344 respectively. When the sensor 36 detects that the two storage valves 344 are full of glue and the ratio of glue is 10:1, a signal is transmitted to the control system 5 to open the discharge switch 3444, the servo motor 32 is started to drive the piston rod 3442 to move in a piston mode, glue A and glue B are pushed respectively and flow into the glue mixing pipe 35 from the glue outlet nozzle 342, the glue mixing pipe rotates at a constant speed, the glue A and the glue B are fully mixed, and the glue mixing process is completed from the pipe head.

Claims (10)

1. The silicone rubber preparation machine comprises a frame and is characterized in that a main material rubber supply system, an auxiliary material rubber supply system and a stirring and mixing system are sequentially arranged on the frame; the main material glue supply system comprises a main material barrel, a double-bellows type feed pump and a main circulation device; the double-bellows type feeding pump comprises a cylinder, valve heads, pistons and cylinder sleeves are symmetrically arranged on the left side and the right side of the cylinder, an oil window is arranged on the front side of the cylinder, a discharge valve and a feeding valve are connected to the cylinder sleeve, the feeding valve is connected with a glue outlet of a main material barrel through a rubber pipe, and the discharge valve is connected with a stirring and mixing system; the auxiliary material glue supply system comprises an auxiliary material barrel, and a glue outlet of the auxiliary material barrel is connected with the stirring and mixing system.
2. The silicone rubber dispensing machine according to claim 1, comprising a frame, wherein the main material rubber supply system further comprises a main rubber pump and a main circulating device, wherein the main rubber pump, a stirrer driven by a motor, a main negative pressure pump with a release valve, a main liquid level sensor, a pressure sensor and an observation window are fixedly arranged on a main rubber pump barrel cover, the main rubber pump is connected with a main material pipe through a first valve, and a filter plug is arranged at the pipe head of the main material pipe; the bottom of the main charging basket body is provided with a glue outlet and is connected with a feed valve of a double-bellows type feed pump through a second valve; the main circulating device is composed of a first filter and a second filter, wherein the first filter is provided with a glue inlet and two glue outlets, the glue inlet is connected with a discharge valve of the double-bellows type feed pump through a rubber pipe, one glue outlet is communicated with the stirring and mixing system, the other glue outlet is connected with the glue inlet of the second filter through the rubber pipe, and the glue outlet of the second filter is connected with the main glue pump through the rubber pipe.
3. The silicone rubber dispensing machine according to claim 1, comprising a frame, wherein the auxiliary material rubber supply system further comprises an auxiliary rubber pump, an auxiliary negative pressure pump and a third filter, wherein an auxiliary material pipe, an auxiliary material liquid level sensor and an auxiliary negative pressure pump with a pressure release valve are arranged at the position of a cover of an auxiliary material barrel, a filter plug is arranged at the head of the auxiliary material pipe, and the auxiliary material barrel is connected with the auxiliary rubber pump through a rubber pipe; the bottom of the auxiliary material barrel is connected with a glue inlet of the third filter through a glue pipe, and a glue outlet of the third filter is connected with a stirring and mixing system through a glue pipe.
4. The silicone rubber dispensing machine according to claim 1, comprising a frame, wherein the stirring and mixing system comprises a fixed support, a servo motor, a planetary reducer, a rubber storage area and a rubber mixing pipe, the planetary reducer is arranged at the top of the fixed support, the servo motor is arranged on the planetary reducer, a sensor is arranged in the middle of the fixed support, the rubber storage area is arranged at the bottom of the fixed support and consists of a mounting plate, a rubber outlet, a diaphragm and a material storage valve, a main material supply pipe orifice and an auxiliary material supply pipe orifice are respectively arranged at the left side and the right side of the mounting plate, the diaphragm is arranged at the front side of the mounting plate, the material storage valve is arranged on the diaphragm, a pipeline is arranged in the mounting plate and communicated with the main material supply pipe orifice and the auxiliary material supply pipe orifice, the rubber outlet is arranged at the bottom of the mounting plate, and the material outlet of the material storage valve is communicated with the rubber outlet; and a rubber mixing pipe is arranged below the rubber outlet nozzle.
5. The silicone rubber dispensing machine according to claim 4, comprising a frame, wherein the storage valve comprises a storage cabin body, a piston rod, a feed switch, a discharge switch and a storage valve observation window, the piston rod is arranged in the storage cabin body, the piston rod is electrically connected with the servo motor and the sensor, and the storage valve observation window is arranged at the front side of the storage cabin body; the storage valve comprises a main storage valve and an auxiliary storage valve, the main storage valve and the auxiliary storage valve are identical in structure, are symmetrically installed, correspond to corresponding feeding systems in installation positions, and have a volume of 10:1.
6. The silicone rubber dispensing machine of claim 1, further comprising a control system electrically connected to the components of the main material supply system, the curing agent supply system, and the stirring and mixing system.
7. A method for preparing silicone rubber is characterized by comprising the following steps:
s1: opening a first valve, sucking the main material A glue into a main material barrel through a main material pipe, and continuously stirring the main material A glue in the main material barrel for defoaming treatment;
the A glue after bubble removal is pumped into the first filter through a double-bellows type feeding pump, and two discharging pipes of the double-bellows type feeding pump can supply glue to the first filter uninterruptedly;
s2: opening a second valve, pumping the adhesive A into a double-bellows type feed pump, regularly pumping the adhesive A into a first filter alternately from two discharge valves for filtering, pumping the adhesive A into a second filter for filtering, and pumping the adhesive A into a main material barrel again after the completion of the filtering to complete the whole circulating filtering process;
s3: sucking the curing agent B glue into the auxiliary material barrel through the auxiliary material pipe, and directly feeding the B glue into a third filter from a discharge hole of the auxiliary material barrel for filtering;
s4: after the filtering process of the glue A and the glue B is finished, a feeding switch is turned on, the glue A enters the main storage valve through the main material feeding pipe opening, the glue B enters the auxiliary storage valve through the auxiliary material feeding pipe opening, and at the moment, a discharging switch is turned off;
when the sensor monitors that the two storage valves are full of glue and the ratio of glue to glue is 10:1, a signal is transmitted to the control system to open the discharge switch, the servo motor is started to drive the piston rod to push the glue A and the glue B respectively, the glue A and the glue B flow into the glue mixing pipe from the glue outlet nozzle, the glue mixing pipe rotates at a constant speed, the glue A and the glue B are fully mixed, and the glue distribution is completed from the pipe head flow of the mixed glue.
8. The method for preparing silicone rubber according to claim 7, wherein in the step S1, a main liquid level sensor monitors the liquid level of the A rubber in the barrel, the liquid level value is lower than a set alarm liquid level, and the main liquid level sensor gives out a signal to prompt manual feeding until the upper limit value of the set liquid level is reached.
9. The method for preparing silicone rubber according to claim 7, wherein the cylinders on the dual bellows type feed pump in the process of S2 move in a regular and uninterrupted and left-right circulation manner in the feed process, so that the a glue alternately flows out from the two discharge ports, the glue components at each place are uniform, and the glue deposited on the pipe wall is continuously washed and dissolved.
10. The method for preparing silicone rubber according to claim 7, wherein the auxiliary material liquid level sensor monitors the liquid level of the B rubber in the barrel in the S3 process, the liquid level value is lower than the set alarm liquid level, and the auxiliary material liquid level sensor gives out a signal to prompt manual feeding until the set liquid level upper limit value is reached.
CN202310227150.5A 2023-03-10 2023-03-10 Silicone rubber compounding machine and compounding method Pending CN116393012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310227150.5A CN116393012A (en) 2023-03-10 2023-03-10 Silicone rubber compounding machine and compounding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310227150.5A CN116393012A (en) 2023-03-10 2023-03-10 Silicone rubber compounding machine and compounding method

Publications (1)

Publication Number Publication Date
CN116393012A true CN116393012A (en) 2023-07-07

Family

ID=87013218

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310227150.5A Pending CN116393012A (en) 2023-03-10 2023-03-10 Silicone rubber compounding machine and compounding method

Country Status (1)

Country Link
CN (1) CN116393012A (en)

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