CN216992844U

CN216992844U - PDCPD two-component flame-retardant injection machine

Info

Publication number: CN216992844U
Application number: CN202220388989.8U
Authority: CN
Inventors: 赵淑豪
Original assignee: Suzhou Shuanghuan Machinery Technology Co ltd
Current assignee: Suzhou Shuanghuan Machinery Technology Co ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-07-19
Anticipated expiration: 2032-02-24

Abstract

The utility model discloses a PDCPD two-component flame-retardant injection machine, which comprises a first component feeding tank and a second component feeding tank for containing a first component raw material and a second component raw material, a flame retardant feeding tank for containing a flame retardant, a first conveying pipeline and a second conveying pipeline, wherein the first conveying pipeline and the second conveying pipeline are used for hermetically communicating the first component feeding tank and the second component feeding tank with the feeding end of a high-pressure mixing head, a fire retardant feeding pipeline used for communicating the fire retardant feeding tank with the second component feeding tank, a first pump and a second pump used for pumping the first component raw material and the second component raw material into the high-pressure mixing head, the utility model ensures that flame-retardant components are uniformly mixed in mixed liquid and realizes the consistent flame-retardant characteristics of all parts of a PDCPD finished product.

Description

PDCPD two-component flame-retardant injection machine

Technical Field

The utility model relates to the technical field of PDCPD material injection molding, in particular to a PDCPD two-component flame-retardant injection machine.

Background

Polydicyclopentadiene (abbreviated as PDCPD in English letters) engineering plastic is a novel engineering material with good mechanical and physical comprehensive properties, and simultaneously has high impact strength, high bending modulus (toughness index), high hardness, high heat deformation temperature and good ageing resistance. At present, PDCPD materials are prepared by mixing and injection molding a material A containing a catalyst and a material B containing an active agent, wherein the material A and the material B are mixed and then injected into a mold for molding, and the material A and the material B are cured in the mold through chemical reaction to obtain a PDCPD product.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model provides the PDCPD two-component flame-retardant injection machine which can obtain a product with flame-retardant property, and the application range of PDCPD products is remarkably expanded.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a PDCPD two-component flame-retardant injection machine comprises a first component feeding tank, a second component feeding tank, a flame retardant feeding tank, a first pump, a second pump, a third pump, a high-pressure mixing head, a hydraulic station, a first conveying pipeline, a second conveying pipeline, a flame retardant feeding pipeline, a first nitrogen supply device, a second nitrogen supply device, a third nitrogen supply device and a control system, wherein discharge ports at the lower ends of the first component feeding tank and the second component feeding tank are respectively communicated with the feed end of at least one high-pressure mixing head through the first conveying pipeline and the second conveying pipeline in a sealing manner, the discharge port at the lower end of the flame retardant feeding tank is communicated with a flame retardant feed port at the upper end of the second component feeding tank through the flame retardant feeding pipeline in a sealing manner, the first pump and the second pump can respectively pump raw materials in the first component feeding tank and the second component feeding tank into the high-pressure mixing head through the first conveying pipeline and the second conveying pipeline, the third pump can pass through fire retardant feed pipe pump income second component feed jar with the fire retardant in the fire retardant feed jar in, hydraulic pressure station drive high pressure mixing head carries out the high pressure to getting into its inside raw materials and mixes, first confession nitrogen device, second confession nitrogen device and third confession nitrogen device give first feed jar respectively, second feed jar and fire retardant feed jar mend nitrogen gas, control system controls first pump, the second pump, the third pump, the hydraulic pressure station, first confession nitrogen device, second confession nitrogen device and third confession nitrogen device work.

As a further improvement of the utility model, a first stirring system, a second stirring system and a third stirring system are respectively arranged in the first component feeding tank, the second component feeding tank and the fire retardant feeding tank, the first stirring system, the second stirring system and the third stirring system can respectively stir raw materials in the first component feeding tank, the second component feeding tank and the fire retardant feeding tank, and the control system controls the start and stop actions of the first stirring system, the second stirring system and the third stirring system.

As a further improvement of the utility model, the motors of the first stirring system and the second stirring system are fixedly arranged at the upper ends of the first component feeding tank and the second component feeding tank, the stirring blades of the first stirring system and the second stirring system are positioned at the lower ends of the inner sides of the first component feeding tank and the second component feeding tank, the motor of the third stirring system is fixedly arranged at the lower end of the flame retardant feeding tank, the stirring blades of the third stirring system are at least two stirring blades which are arranged at intervals from the lower end to the upper end of the inner side of the flame retardant feeding tank, and the upper end of the flame retardant feeding tank is provided with an openable feeding cover.

As a further improvement of the utility model, the first supply tank and the second supply tank are respectively provided with a first liquid level switch and a second liquid level switch, the first liquid level switch and the second liquid level switch can respectively sense the liquid level height in the first supply tank and the second supply tank, the first liquid level switch and the second liquid level switch are respectively and electrically connected and communicated with the control system, the first component supplement tank, the second component supplement tank, the fire retardant supplement tank, the fourth pump, the fifth pump, the sixth pump, the fourth nitrogen supply device, the fifth nitrogen supply device, the sixth nitrogen supply device, the first supplement pipeline, the second supplement pipeline, the third supplement pipeline and the vacuum pumping system are also arranged, the first component supplement tank, the second component supplement tank and the fire retardant supplement tank are respectively and hermetically communicated with the raw material inlets of the first component supply tank, the second component supply tank and the fire retardant supply tank through the first supplement pipeline, the second supplement pipeline and the third supplement pipeline, the fourth pump, the fifth pump and the sixth pump can respectively pump raw materials in the first component supplementing barrel, the second component supplementing barrel and the fire retardant supplementing barrel into the first component feeding tank, the second component feeding tank and the fire retardant feeding tank through the first supplementing pipeline, the second supplementing pipeline and the third supplementing pipeline, the fourth nitrogen supply device, the fifth nitrogen supply device and the sixth nitrogen supply device can respectively supplement nitrogen for the component supplementing barrel, the second component supplementing barrel and the fire retardant supplementing barrel, the vacuumizing system can vacuumize the fire retardant feeding tank, the pressure detection device is arranged on the fire retardant feeding tank and can detect the pressure value in the fire retardant feeding tank and transmit the pressure value to the control system, and the control system controls the fourth pump, the fifth pump, the sixth pump, the fourth nitrogen supply device, the fifth nitrogen supply device, the sixth nitrogen supply device and the vacuumizing system to act to start and stop.

As a further improvement of the utility model, the first feeding pipeline is provided with a first single valve and a first ball valve, the second feeding pipeline is provided with a second single valve and a second ball valve, the third feeding pipeline is provided with a third single valve and a third ball valve, the first check valve, the second check valve and the third check valve respectively only allow the liquid in the first component feeding barrel, the second component feeding barrel and the fire retardant feeding barrel to flow towards the first component feeding tank, the second component feeding tank and the fire retardant feeding tank, the first ball valve, the second ball valve and the third ball valve can control the first feeding pipeline, the second feeding pipeline and the third feeding pipeline to be opened or closed, and the control system controls the first ball valve, the second ball valve and the third ball valve to act.

As a further improvement of the utility model, a fire retardant return pipeline is connected to the fire retardant supply pipeline through a tee joint, the discharge end of the fire retardant return pipeline is communicated with a return feed inlet at the upper end of the fire retardant supply tank, the fire retardant supply pipeline is also provided with a fourth one-way valve and a fourth ball valve at one side of the tee joint facing the second component supply tank, the fourth one-way valve only allows liquid in the fire retardant supply tank to flow towards the second component supply tank, the fourth ball valve can control the fire retardant supply pipeline to be communicated with or closed off the second component supply tank, and the control system controls the fourth ball valve to be opened and closed.

As a further improvement of the utility model, the high-pressure mixing head comprises a first feeding chamber, a second feeding chamber, a mixing chamber, a stabilizing chamber and a feeding piston, one end of the first component backflow pipeline and one end of the second component backflow pipeline are respectively communicated with the first feeding chamber and the second feeding chamber in a sealing way, the other end of the first component backflow pipeline and the other end of the second component backflow pipeline are respectively communicated with backflow feeding ports at the upper ends of a first component feeding tank and a second component feeding tank in a sealing way, the feeding piston can respectively feed raw materials in the first feeding chamber and the second feeding chamber into the feeding end of the mixing chamber, the discharging end of the mixing chamber is communicated with the stabilizing chamber, the stabilizing chamber is communicated with an injection nozzle, the first feeding chamber and the second feeding chamber are respectively internally provided with the first component stopping or switching system and the second component stopping or switching system, the first component cut-off or switching system can control the opening of one of the first conveying pipeline and the first return pipeline, the second component cut-off or switching system can control the opening of one of the second conveying pipeline and the second return pipeline, and the control system controls the synchronous action of the first cut-off or switching system, the second cut-off or switching system and the third cut-off or switching system.

As a further improvement of the utility model, a first reflux metering device is connected to the first reflux pipeline through a first metering control valve, a second reflux metering device is connected to the second reflux pipeline through a second metering control valve, the first reflux metering device and the second reflux metering device can respectively meter the flow in the first reflux pipeline and the second reflux pipeline, the first metering control valve and the second metering control valve respectively control the start and stop of the first reflux metering device and the second reflux metering device, and the control system controls the linkage and synchronous start and stop of the metering control valves on the first reflux pipelines.

As a further improvement of the utility model, the first feeding tank, the second feeding tank and the fire retardant feeding tank are respectively provided with a first temperature sensing device, a second temperature sensing device and a third temperature sensing device, the first temperature sensing device, the second temperature sensing device and the third temperature sensing device can respectively sense the liquid temperature in the first feeding tank, the second feeding tank and the fire retardant feeding tank, the first temperature sensing device, the second temperature sensing device and the third temperature sensing device are respectively electrically connected and communicated with the control system, the side walls of the first feeding tank, the second feeding tank and the fire retardant feeding tank are respectively provided with a circulating water flow passage, the first return pipeline and the second return pipeline are respectively provided with a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger are respectively communicated with a water circulation temperature control machine to form a circulation temperature control loop.

As a further improvement of the present invention, the first and second delivery pipes are further provided with a first pressure sensor and a second pressure sensor, the first and second pressure sensors can detect pressure values in the first and second delivery pipes respectively and transmit the pressure values to the control system, the first and second delivery pipes are further provided with a first overflow pipeline and a second overflow pipeline, the first and second overflow pipelines are respectively communicated with the first and second return pipelines, the first and second overflow pipelines are provided with a first overflow control valve and a second overflow control valve respectively, and the first and second overflow control valves can control the opening and closing of the first and second overflow pipelines.

The utility model has the beneficial effects that: according to the utility model, the flame retardant is uniformly mixed in the flame retardant feeding tank and then injected into the second component feeding tank to be mixed with the second component raw material, then the second component raw material mixed with the flame retardant and the first component raw material are mixed in the high-pressure mixing head and then injected into the sealed die, and finally the cured and molded product has a flame retardant effect.

Drawings

Fig. 1 is a schematic diagram of the principle of the present invention.

Detailed Description

Example (b): PDCPD two-component flame-retardant injection machine, including first component feed jar 1, second component feed jar 2, fire retardant feed jar 3, first pump 4, second pump 5, third pump 6, high-pressure mixing head 7, hydraulic pressure station, first pipeline 8, second pipeline 9, fire retardant feed pipeline 10, first nitrogen supply device 11, second nitrogen supply device 12, third nitrogen supply device 13 and control system, the discharge gate of first component feed jar 1 and second component feed jar 2 lower extreme is respectively through the sealed intercommunication of first pipeline 8 and second pipeline 9 and at least one high-pressure mixing head 7's feed end, the discharge gate of fire retardant feed jar 3 lower extreme passes through fire retardant feed pipeline 10 and the sealed intercommunication of fire retardant feed inlet of second component feed jar 2 upper end, first pump 4 and second pump 5 do not can pump the raw materials in first component feed jar 1 and the second component feed jar 2 into high-pressure mixing head 7 through first pipeline 8 and second pipeline 9 through first pipeline 9 In, the fire retardant in the third pump 6 can be with fire retardant feed jar 3 is gone into second component feed jar 2 through fire retardant feed pipeline 10 pump, hydraulic pressure station drive high pressure mixing head 7 carries out the high pressure to the raw materials that gets into its inside and mixes, first confession nitrogen device 11, second confession nitrogen device 12 and third confession nitrogen device 13 give first feed jar respectively, second feed jar and 3 compensations of fire retardant feed jar nitrogen gas, control system controls first pump 4, the second pump 5, the third pump 6, hydraulic pressure station, first confession nitrogen device 11, the second confession nitrogen device 12 and the work of third confession nitrogen device 13.

During injection molding, the third pump 6 is started firstly, the mixed flame retardant in the flame retardant feeding tank 3 is pumped into the first component feeding tank 1, the flame retardant is mixed with the raw material in the second feeding tank, then the mixed raw material in the first component feeding tank 1 and the second feeding tank is pumped into the high-pressure mixing head 7 by the first pump 4 and the second pump 5 respectively for high-pressure opposite-flushing mixing, the mixed raw material is injected into a sealed die after mixing, the raw materials in the first feeding tank and the second feeding tank are fully reacted and cured in the die to form a PDCPD product with flame retardant effect, along with the first feeding tank, the raw materials in the second feeding tank and the flame retardant feeding tank 3 are pumped out, the first nitrogen supply device, the second nitrogen supply device 12 and the third nitrogen supply device 13 automatically supply the first feeding tank respectively, nitrogen is supplemented in the second feeding tank and the flame retardant feeding tank 3, and the raw material oxidation is avoided, the flame retardant can be a reactive flame retardant or an additive flame retardant, the reactive flame retardant and a monomer form a copolymer or a macromolecule is subjected to a grafting reaction to form a macromolecule flame retardant, for example, norbornene is selected as the reactive flame retardant, the norbornene is modified to enable the structure of the norbornene to have flame retardant elements, a modified norbornene derivative (NBE) is obtained, and then the norbornene derivative (NBE) is copolymerized with PDCPD, so that an ideal PDCPD flame retardant product is obtained; the additive flame retardant does not react with the base material and other components in the base material and is only dispersed in the base material in a physical mode.

First mixing system 14, second mixing system 15 and third mixing system 16 are equipped with respectively in first component feed jar 1, second component feed jar 2 and the fire retardant feed jar 3, raw materials are stirred in first component feed jar 1, second component feed jar 2 and the fire retardant feed jar 3 respectively to first mixing system 14, second mixing system 15 and third mixing system 16, and control system controls first mixing system 14, second mixing system 15 and third mixing system 16 and opens and stop the action. Through first mixing system 14, second mixing system 15 and third mixing system 16 respectively for first component feed jar 1, second component feed jar 2 and fire retardant feed jar 3 interior raw materials stir, keep in the raw materials mixture evenly distributed, avoid appearing the deposit, and then guarantee the shaping quality.

The motor fixed mounting of first mixing system 14 and second mixing system 15 is in first component feed jar 1 and 2 upper ends of second component feed jar, and the stirring vane of first mixing system 14 and second mixing system 15 is located the inboard lower extreme of first component feed jar 1 and second component feed jar 2, the motor fixed mounting of third mixing system 16 is in fire retardant feed jar 3 lower extreme, and the stirring vane of third mixing system 16 is for at least two from the inboard lower extreme of fire retardant feed jar 3 to upper end interval arrangement, the fire retardant feed jar 3 upper end is equipped with can the open reinforced lid 17. First mixing system 14 and second mixing system 15 mainly stir at first component feed jar 1 and 2 lower extremes of second component feed jar, prevent that the deposit from blockking up the discharge gate, third mixing system 16 all stirs at 3 lower extremes of fire retardant feed jar and middle part, the realization is to the intensive mixing of each component in the fire retardant, make fire-retardant raw materials fast dispersion misce bene, avoid the lower extreme to appear the deposit simultaneously and block up the discharge gate, fire-retardant materials 'such as fire-retardant powder's input can be realized through the feed jar that can open in 3 upper ends of fire retardant feed jar.

The first feeding tank and the second feeding tank are respectively provided with a first liquid level switch 18 and a second liquid level switch 19, the first liquid level switch 18 and the second liquid level switch 19 can respectively sense the liquid level heights in the first feeding tank and the second feeding tank, the first liquid level switch 18 and the second liquid level switch 19 are respectively in electrical connection and communication with a control system, the first feeding tank 21, the second feeding tank 22, the fire retardant feeding tank 23, the fourth pump 24, the fifth pump 25, the sixth pump 26, the fourth nitrogen supply device 27, the fifth nitrogen supply device 28, the sixth nitrogen supply device 29, the first feeding pipeline 30, the second feeding pipeline 31, the third feeding pipeline 32 and the vacuum pumping system 33 are further arranged, the first feeding tank 21, the second feeding tank 22 and the fire retardant feeding tank 23 are respectively connected with the first feeding tank 1, the second feeding pipeline 31 and the third feeding pipeline 32, The raw material inlets of the second component feeding tank 2 and the fire retardant feeding tank 3 are communicated in a sealing way, the fourth pump 24, the fifth pump 25 and the sixth pump 26 can respectively pump the raw materials in the first component supplementing barrel 21, the second component supplementing barrel 22 and the fire retardant supplementing barrel 23 into the first component feeding tank 1, the second component feeding tank 2 and the fire retardant feeding tank 3 through the first supplementing pipeline 30, the second supplementing pipeline 31 and the third supplementing pipeline 32, the fourth nitrogen supply device 27, the fifth nitrogen supply device 28 and the sixth nitrogen supply device 29 can respectively supplement nitrogen into the component supplementing barrel, the second component supplementing barrel 22 and the fire retardant supplementing barrel 23, the vacuumizing system 33 can vacuumize the fire retardant feeding tank 3, the fire retardant feeding tank 3 is provided with a pressure detection device, the pressure detection device can detect the pressure value in the fire retardant feeding tank 3 and transmit the pressure value to the control system, and the control system controls the fourth pump 24, the fifth pump 22, the fifth pump 25 and the sixth pump 26, And starting and stopping the fifth pump 25, the sixth pump 26, the fourth nitrogen supply device 27, the fifth nitrogen supply device 28, the sixth nitrogen supply device 29 and the vacuum-pumping system 33. Detect raw materials liquid level in first feed jar, second feed jar and the fire retardant feed jar 3 through first level switch 18, second level switch 19 and third level switch, first level switch 18, second level switch 19 and third level switch can divide three-section control to carry out liquid level monitoring: the device is characterized in that the device is respectively a lower limit, an upper limit and an upper limit, a liquid level display device and a touch screen can be arranged on the device to display the current liquid level state in real time, and the control system respectively controls the operations of feeding the high-pressure mixing head 7 and automatically supplementing the raw materials according to the start and stop actions of the first pump 4, the second pump 5, the third pump 6, the fourth pump 24, the fifth pump 25 and the sixth pump 26 according to the liquid level information acquired by the first liquid level switch 18, the second liquid level switch 19 and the third liquid level switch.

The first feeding pipeline 30 is provided with a first single valve 34 and a first ball valve 35, the second feeding pipeline 31 is provided with a second single valve 36 and a second ball valve 37, the third feeding pipeline 32 is provided with a third single valve 38 and a third ball valve 39, the first check valve, the second check valve and the third check valve only allow the liquid in the first component feeding barrel 21, the second component feeding barrel 22 and the fire retardant feeding barrel 23 to flow towards the first component feeding tank 1, the second component feeding tank 2 and the fire retardant feeding tank 3 respectively, the first ball valve 35, the second ball valve 37 and the third ball valve 39 can control the first feeding pipeline 30, the second feeding pipeline 31 and the third feeding pipeline 32 to be opened or closed, and the control system controls the first ball valve 35, the second ball valve 37 and the third ball valve 39 to act. The make-and-break of the feeding pipeline is controlled by the first ball valve 35, the second ball valve 37 and the third ball valve 39, so that feeding is realized or feeding is stopped.

The fire retardant feeding pipeline 10 is connected with a fire retardant return pipeline 40 through a tee joint, the discharge end of the fire retardant return pipeline 40 is communicated with a return feed inlet at the upper end of the fire retardant feeding tank 3, the fire retardant feeding pipeline 10 is positioned at one side of the tee joint facing the second component feeding tank 2 and is also provided with a fourth single valve 41 and a fourth ball valve 42, the fourth single valve only allows liquid in the fire retardant feeding tank 3 to flow towards the direction of the second component feeding tank 2, the fourth ball valve 42 can control the fire retardant feeding pipeline 10 to be communicated with or closed by the second component feeding tank 2, and the control system controls the fourth ball valve 42 to be opened and closed. The on-off control of the fire retardant feeding pipeline 10 is realized through the fourth ball valve 42, the fire retardant is fed into the second component feeding tank 2 or the fire retardant is stopped to be fed continuously, and after the fourth ball valve 42 is closed, the fire retardant pumped by the third pump 6 returns to the fire retardant feeding tank 3 through the fire retardant return pipeline 40 to be stored.

The high-pressure mixing head 7 comprises a first feeding chamber, a second feeding chamber, a mixing chamber, a stabilizing chamber and a feeding piston, wherein one end of the first component backflow pipeline 43 and one end of the second component backflow pipeline 44 are respectively communicated with the first feeding chamber and the second feeding chamber in a sealing manner, the other end of the first component backflow pipeline 43 and the other end of the second component backflow pipeline 44 are respectively communicated with backflow feeding ports at the upper ends of the first component feeding tank 1 and the second component feeding tank 2, the feeding piston can respectively feed raw materials in the first feeding chamber and the second feeding chamber into the feeding end of the mixing chamber, the discharging end of the mixing chamber is communicated with the stabilizing chamber, the stabilizing chamber is communicated with an injection nozzle, the first feeding chamber and the second feeding chamber are internally provided with a first component stopping or switching system 45 and a second component stopping or switching system 46 respectively, the first component cut-off or switching system 45 is able to control the opening of either the first delivery duct 8 or the first return duct, the second component cut-off or switching system 46 is able to control the opening of either the second delivery duct 9 or the second return duct, the control system controlling the first cut-off or switching system, the second cut-off or switching system and the third cut-off or switching system to act in synchronism. Raw materials in first component feed jar 1 and the second component feed jar 2 get into respectively in the high pressure mixing head 7, after the injection is accomplished, first in the high pressure mixing head 7 by or switching system and second by or switching system closes first pipeline 8 and 9 discharge gates of second pipeline, open first backward flow pipeline and second backward flow pipeline feed inlet simultaneously, the indoor raw materials of each feeding of high pressure mixing head 7 can follow first backward flow pipeline and second backward flow pipeline and flow back, make each component raw materials form recycling, avoid the raw materials extravagant.

First backflow pipeline is connected with first backflow metering device 48 through first metering control valve 47, second backflow pipeline is connected with second backflow metering device 50 through second metering control valve 49, first backflow metering device 48 and second backflow metering device 50 can measure the flow in first backflow pipeline and the second backflow pipeline respectively, first backflow metering device 48 and second metering control valve 49 control first backflow metering device 48 and second backflow metering device 50 respectively and open and stop, the synchronous start-stop of the metering control valve linkage on each first backflow pipeline of control system control. Can measure the raw materials of backward flow in the first return line and the raw materials of backward flow in the second return line through backward flow metering device, be convenient for calculate the volume of raw materials in first feed jar and the second feed jar to the accurate feed of next shot forming.

The first feeding tank, the second feeding tank and the fire retardant feeding tank 3 are respectively provided with a first temperature sensing device 51, a second temperature sensing device 52 and a third temperature sensing device 53, the first temperature sensing device 51, the second temperature sensing device 52 and the third temperature sensing device 53 can respectively sense the temperature of liquid in the first feeding tank, the second feeding tank and the fire retardant feeding tank 3, the first temperature sensing device 51, the second temperature sensing device 52 and the third temperature sensing device 53 are respectively in electric connection and communication with a control system, the side walls of the first feeding tank, the second feeding tank and the fire retardant feeding tank 3 are respectively provided with a circulating water flow channel, a water circulating temperature control machine 54 is further arranged, the water circulating temperature control machine 54 is respectively communicated with the circulating water flow channels of the first feeding tank, the second feeding tank and the fire retardant feeding tank 3 through water pipes to form a circulating temperature control loop, and the first return pipeline and the second return pipeline are respectively provided with a first heat exchanger 55 and a second heat exchanger 56 The first heat exchanger 55 and the second heat exchanger 56 are respectively communicated with the water circulation temperature control machine 54 to form a circulation temperature control loop. Through set up temperature sensing device on the feed tank, be convenient for real-time supervision feed tank interior material temperature, and carry out cooling temperature control for the feed tank through water circulation temperature control machine 54, the raw materials of first backflow pipeline and second backflow pipeline internal reflux also return first component feed tank and second component feed tank 2 after first heat exchanger 55 and the 56 heat transfer of second heat exchanger in, avoid the material temperature too high or low excessively, make the raw materials be in suitable temperature injection mold all the time, guarantee its normal solidification shaping.

The first conveying pipeline 8 and the second conveying pipeline 9 are further provided with a first pressure sensor 57 and a second pressure sensor 58 respectively, the first pressure sensor 57 and the second pressure sensor 58 can detect pressure values in the first conveying pipeline 8 and the second conveying pipeline 9 respectively and transmit the pressure values to a control system, the first conveying pipeline 8 and the second conveying pipeline 9 are further provided with a first overflow pipeline and a second overflow pipeline respectively, the first overflow pipeline and the second overflow pipeline are communicated with a first return pipeline and a second return pipeline respectively, the first overflow pipeline and the second overflow pipeline are provided with a first overflow control valve 59 and a second overflow control valve 60 respectively, and the first overflow control valve 59 and the second overflow control valve 60 can control opening and closing of the first overflow pipeline and the second overflow pipeline.

When the pressure in the first conveying pipeline and the second conveying pipeline is overlarge, the first overflow control valve 59 and the second overflow control valve 60 are opened, liquid in the first conveying pipeline 8 and the second conveying pipeline 9 is overflowed and decompressed into the first return pipeline and the second return pipeline, when the pressure of the liquid in the first pipeline and the second pipeline returns to normal, the first overflow control valve 59 and the second overflow control valve 60 are closed, the overflow is stopped, the pressure in the first conveying pipeline 8 and the pressure in the second conveying pipeline 9 are kept, the first filter 61 and the second filter 62 for filtering raw materials are respectively arranged on the discharge ports of the first feeding tank and the second feeding tank, and therefore the phenomenon that pollutants enter a die and cause defects on products is avoided.

Claims

1. A PDCPD two-component flame-retardant injection machine is characterized in that: comprises a first component feeding tank (1), a second component feeding tank (2), a fire retardant feeding tank (3), a first pump (4), a second pump (5), a third pump (6), a high-pressure mixing head (7), a hydraulic station, a first conveying pipeline (8), a second conveying pipeline (9), a fire retardant feeding pipeline (10), a first nitrogen supply device (11), a second nitrogen supply device (12), a third nitrogen supply device (13) and a control system, wherein discharge ports at the lower ends of the first component feeding tank and the second component feeding tank are respectively communicated with a feeding end of at least one high-pressure mixing head through the first conveying pipeline and the second conveying pipeline in a sealing manner, a discharge port at the lower end of the fire retardant feeding tank is communicated with a fire retardant feeding port of the second component feeding tank through the fire retardant feeding pipeline in a sealing manner, and raw materials in the first component feeding tank and the second component feeding tank can be respectively pumped into the high-pressure mixing head through the first conveying pipeline and the second conveying pipeline, the third pump can pass through fire retardant feed pipe pump income second component feed jar with the fire retardant in the fire retardant feed jar in, hydraulic pressure station drive high pressure mixing head carries out the high pressure to getting into its inside raw materials and mixes, first confession nitrogen device, second confession nitrogen device and third confession nitrogen device give first feed jar respectively, second feed jar and fire retardant feed jar mend nitrogen gas, control system controls first pump, the second pump, the third pump, the hydraulic pressure station, first confession nitrogen device, second confession nitrogen device and third confession nitrogen device work.

2. The PDCPD two-component flame-retardant injection machine according to claim 1, wherein: first component feed jar, second component feed jar and fire retardant feed jar are equipped with first mixing system (14), second mixing system (15) and third mixing system (16) in respectively, first mixing system, second mixing system and third mixing system can stir first component feed jar, second component feed jar and fire retardant feed jar interior raw materials respectively, and the action is opened and stop to first mixing system of control system control, second mixing system and third mixing system.

3. The PDCPD two-component flame-retardant injection machine according to claim 2, characterized in that: first mixing system and second mixing system's motor fixed mounting is in first component feed jar and second component feed jar upper end, and first mixing system and second mixing system's stirring vane is located the inboard lower extreme of first component feed jar and second component feed jar, third mixing system's motor fixed mounting is in fire retardant feed jar lower extreme, and third mixing system's stirring vane is from the inboard lower extreme of fire retardant feed jar to at least two of upper end interval arrangement, fire retardant feed jar upper end is equipped with reinforced lid (17) that can open.

4. A PDCPD two-component flame-retardant injection machine according to claim 2 or 3, characterized in that: the first feeding tank and the second feeding tank are respectively provided with a first liquid level switch (18) and a second liquid level switch (19), the first liquid level switch and the second liquid level switch can respectively sense the liquid level heights in the first feeding tank and the second feeding tank, the first liquid level switch and the second liquid level switch are respectively in electric connection and communication with a control system, the first feeding tank is further provided with a first component feeding barrel (21), a second component feeding barrel (22), a fire retardant feeding barrel (23), a fourth pump (24), a fifth pump (25), a sixth pump (26), a fourth nitrogen supply device (27), a fifth nitrogen supply device (28), a sixth nitrogen supply device (29), a first feeding pipeline (30), a second feeding pipeline (31), a third feeding pipeline (32) and a vacuum pumping system (33), and the first component feeding barrel, the second component feeding barrel and the fire retardant feeding barrel are respectively communicated with the first feeding tank, the second feeding pipeline and the third feeding pipeline, The raw material inlets of the second component feeding tank and the fire retardant feeding tank are communicated in a sealing mode, the fourth pump, the fifth pump and the sixth pump can respectively pump the raw materials in the first component supplementing barrel, the second component supplementing barrel and the fire retardant supplementing barrel into the first component feeding tank, the second component feeding tank and the fire retardant feeding tank through the first supplementing pipeline, the second supplementing pipeline and the third supplementing pipeline, the fourth nitrogen supply device, the fifth nitrogen supply device and the sixth nitrogen supply device can respectively supplement nitrogen for the component supplementing barrel, the second component supplementing barrel and the fire retardant supplementing barrel, the vacuumizing system can vacuumize the fire retardant feeding tank, the fire retardant feeding tank is provided with a pressure detection device, the pressure detection device can detect the pressure value in the fire retardant feeding tank and transmit the pressure value to the control system, and the control system controls the fourth pump, the fifth pump, the sixth pump, the fourth nitrogen supply device, the fifth nitrogen supply device, And starting and stopping the sixth nitrogen supply device and the vacuum pumping system.

5. The PDCPD two-component flame-retardant injection machine according to claim 4, wherein: the fire retardant feeding device is characterized in that a first check valve (34) and a first ball valve (35) are arranged on the first feeding pipeline, a second check valve (36) and a second ball valve (37) are arranged on the second feeding pipeline, a third check valve (38) and a third ball valve (39) are arranged on the third feeding pipeline, the first check valve, the second check valve and the third check valve only allow liquid in the first component feeding barrel, the second component feeding barrel and the fire retardant feeding barrel to flow towards the first component feeding tank, the second component feeding tank and the fire retardant feeding tank respectively, the first ball valve, the second ball valve and the third ball valve can control the first feeding pipeline, the second feeding pipeline and the third feeding pipeline to be opened or closed, and the control system controls the first ball valve, the second ball valve and the third ball valve to act.

6. The PDCPD two-component flame-retardant injection machine according to claim 1, which is characterized in that: the fire retardant feeding device is characterized in that a fire retardant return pipeline (40) is connected to the fire retardant feeding pipeline through a tee joint, the discharge end of the fire retardant return pipeline is communicated with a return feeding hole in the upper end of the fire retardant feeding tank, the fire retardant feeding pipeline is located in the tee joint and is communicated with a fourth check valve (41) and a fourth ball valve (42) towards one side of the second component feeding tank, the fourth check valve only allows liquid in the fire retardant feeding tank to flow towards the direction of the second component feeding tank, the fourth ball valve can control the fire retardant feeding pipeline to be communicated with or closed with the second component feeding tank, and a control system controls the fourth ball valve to be opened and closed.

7. The PDCPD two-component flame-retardant injection machine according to claim 1, wherein: the high-pressure mixing head is also provided with a first component backflow pipeline (43), a second component backflow pipeline (44), a first component stopping or switching system (45) and a second component stopping or switching system (46), the high-pressure mixing head comprises a first feeding chamber, a second feeding chamber, a mixing chamber, a stabilizing chamber and a feeding piston, one end of the first component backflow pipeline and one end of the second component backflow pipeline are respectively communicated with the first feeding chamber and the second feeding chamber in a sealing manner, the other end of the first component backflow pipeline and the other end of the second component backflow pipeline are respectively communicated with backflow feeding ports at the upper ends of a first component feeding tank and a second component feeding tank in a sealing manner, the feeding piston can respectively feed raw materials in the first feeding chamber and the second feeding chamber into the feeding end of the mixing chamber, the discharging end of the mixing chamber is communicated with the stabilizing chamber, the stabilizing chamber is communicated with an injection nozzle, the first component stopping or switching system and the second component stopping or switching system are respectively arranged in the first feeding chamber and the second feeding chamber, the first component cut-off or switching system can control the opening of one of the first conveying pipeline and the first return pipeline, the second component cut-off or switching system can control the opening of one of the second conveying pipeline and the second return pipeline, and the control system controls the synchronous action of the first cut-off or switching system, the second cut-off or switching system and the third cut-off or switching system.

8. The PDCPD two-component flame-retardant injection machine according to claim 7, wherein: the first backflow pipeline is connected with a first backflow metering device (48) through a first metering control valve (47), the second backflow pipeline is connected with a second backflow metering device (50) through a second metering control valve (49), the first backflow metering device and the second backflow metering device can meter the flow in the first backflow pipeline and the second backflow pipeline respectively, the first backflow metering device and the second backflow metering device are controlled by the first metering control valve and the second metering control valve respectively to start and stop, and the metering control valves on the first backflow pipelines are controlled by a control system to synchronously start and stop in a linkage mode.

9. The PDCPD two-component flame-retardant injection machine according to claim 7, wherein: the feeding device is characterized in that a first temperature sensing device (51), a second temperature sensing device (52) and a third temperature sensing device (53) are further arranged on the first feeding tank, the second feeding tank and the fire retardant feeding tank respectively, the first temperature sensing device, the second temperature sensing device and the third temperature sensing device can sense the liquid temperatures in the first feeding tank, the second feeding tank and the fire retardant feeding tank respectively, the first temperature sensing device, the second temperature sensing device and the third temperature sensing device are communicated with the control system in an electric connection mode respectively, a circulating water flow channel is further arranged on the side wall of each of the first feeding tank, the second feeding tank and the fire retardant feeding tank, a water circulating temperature control machine (54) is further arranged, the water circulating temperature control machine is communicated with the circulating water flow channels of the first feeding tank, the second feeding tank and the fire retardant feeding tank through water pipes respectively to form a circulating temperature control loop, and a first heat exchanger (55) and a second heat exchanger (56) are further arranged on the first return pipeline and the second return pipeline respectively ) And the first heat exchanger and the second heat exchanger are respectively communicated with a water circulation temperature control machine to form a circulation temperature control loop.

10. The PDCPD two-component flame-retardant injection machine according to claim 7, wherein: still be equipped with first pressure sensor (57) and second pressure sensor (58) on first pipeline and the second pipeline respectively, first pressure sensor and second pressure sensor can detect the pressure value in first pipeline and the second pipeline respectively and signal for control system, still set up first overflow pipeline and second overflow pipeline on first pipeline and the second pipeline respectively, first overflow pipeline and second overflow pipeline communicate with first return line and second return line respectively, set up first overflow control valve (59) and second overflow control valve (60) on first overflow pipeline and the second overflow pipeline respectively, first overflow control valve and second overflow control valve can control first overflow pipeline and second overflow pipeline switching.