Utility model content
The technical problems to be solved in the utility model is: for overcoming the problems referred to above, provides the Novel screw type low-pressure injection molding machine of a kind of anticol material carbonization.
The utility model solves the technical scheme that its technical problem adopts:
A kind of Novel screw type low-pressure injection molding machine, comprise gun barrel, the outer wall of described gun barrel is provided with calandria, described calandria comprises first order calandria, second level calandria and third level calandria, the upper end of described gun barrel is sealedly connected with upper seal support, the sidewall of described upper seal support is communicated with barrel, screw rod is provided with in the seal of described upper seal support upper end, described screw rod upper end is connected with drive rotating device and is turned by it, the lower end of described gun barrel is stretched in the lower end of described screw rod, lower end and the heater of described gun barrel are tightly connected, the lower end of described gun barrel is communicated with appearance glue space shaping in described heater, the side of described heater is provided with the first pressure sensor, the collection terminal of described first pressure sensor stretches in described appearance glue space, described heater is also provided with the plastic hole be communicated with described appearance glue space, the side of described plastic hole is also provided with glue feeding opening, described glue feeding opening is communicated with the sebific duct connecting hole be arranged on the downside of described heater, described drive rotating device is all connected with a controller with the first pressure sensor.
Preferably, the return valve of described glue feeding opening side relative to being arranged on it is communicated with, and described return valve is communicated with described appearance glue space by return flow path, and described return valve is connected with return valve cylinder.
Preferably, the side of described heater is provided with the second pressure sensor, and the collection terminal of described second pressure sensor stretches in described sebific duct connecting hole, and described second pressure sensor is also connected with described controller.
Preferably, described heater comprises multiple fire-bar, and described multiple fire-bar is separately positioned in multiple through hole running through described heater.
Preferably, described through hole is provided with 8, and described through hole is arranged on the side of described heater uniformly.
Preferably, described heater is overall aluminium block.
Preferably, the junction of described gun barrel and described heater and upper seal support is all provided with diaphragm seal.
The beneficial effects of the utility model are: gun barrel is divided into three sections of temperature controlled region by arranging of calandria multistage described in the utility model; This kind is arranged so that the sizing material on upper strata is graininess, and the sizing material of lower floor is liquid, effectively can prevent liquid sizing material adverse current; The actual pressure value that described first pressure sensor detects can compare with the reference pressure value preset in the controller; when actual pressure is less than normal pressure; described controller controls drive rotating device and rotates; sizing material is supplemented into described appearance glue space; avoid holding under remaining a small amount of sizing material is in hot environment for a long time in glue space and cause carbonization; postpone sizing material carbonization time; improve sizing material carbonization problem and in order to avoid in time reinforcedly cause shutdown, and by the backflow of return valve application solutions sizing material.
Detailed description of the invention
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
The specific embodiment of a kind of Novel screw type low-pressure injection molding machine described in the utility model is provided below.
Embodiment 1
Described in the utility model a kind of Novel screw type low-pressure injection molding machine as shown in Figure 1, comprise gun barrel 2, the outer wall of described gun barrel 2 is provided with calandria, described calandria comprises first order calandria, second level calandria and third level calandria (three calandrias do not show in the drawings), described first order calandria, second level calandria and third level calandria preferably set gradually from top to down, and preferred heating-up temperature increases gradually, described first order calandria, second level calandria and third level calandria can adopt conventional electrified regulation sheet or other Conventional heaters, specifically do not limit, gun barrel 2 is divided into three sections of temperature controlled region by arranging of multistage calandria: A section: low-temperature space, sizing material is graininess, B section: middle warm area, sizing material is half thawing shape, C section: high-temperature region, sizing material is for melting shape, this kind is arranged so that the sizing material on upper strata is graininess, and the sizing material of lower floor is liquid, effectively can prevent liquid sizing material adverse current.
The upper end of described gun barrel 2 is sealedly connected with upper seal support 3, as shown in Figure 2, the sidewall of described upper seal support 3 is communicated with barrel 1, make the sizing material in described barrel 1 can enter in described gun barrel 2 by upper seal support 3, screw rod 5 is provided with in the seal of described upper seal support 3 upper end, described screw rod 5 upper end is connected with drive rotating device 4 and is turned by it, described drive rotating device 4 preferably adopts motor, the lower end of described gun barrel 2 is stretched in the lower end of described screw rod 5, lower end and the heater 6 of described gun barrel 2 are tightly connected, the lower end of described gun barrel 2 is communicated with appearance glue space 13 shaping in described heater 6, sizing material enters in described appearance glue space 13 by gun barrel 2, as shown in Figure 3, the side of described heater 6 is provided with the first pressure sensor 8, the collection terminal of described first pressure sensor 8 stretches in described appearance glue space 13, described heater 6 is also provided with the plastic hole 10 be communicated with described appearance glue space 13, the side of described plastic hole 10 is also provided with glue feeding opening 11, described glue feeding opening 11 is communicated with the sebific duct connecting hole 14 be arranged on the downside of described heater 6, described plastic hole 10 is communicated with appearance glue space 13, as shown in Figure 6, preferably through glue pump 17, sizing material is extracted out by plastic hole 10, send into glue feeding opening 11 again finally by sebific duct connecting hole 14 via sebific duct, utilize glue rifle, be filled with in mold cavity, described glue pump 17 also can be used to supercharging (pressure that different product needed is different), described drive rotating device 4 is all connected with a controller with the first pressure sensor 8, described glue pump 17 is preferably also connected with described controller 8, supercharging is carried out by the setting value in controller 8, along with the sizing material in described appearance glue space 13 increases gradually, described appearance glue space 13 internal pressure also strengthens gradually, the actual pressure value that described first pressure sensor 8 detects can compare with the reference pressure value preset in the controller, when actual pressure arrives normal pressure, described controller controls drive rotating device 4 and stops operating, no longer charging, avoiding continuing reinforced causing in colloidal sol space that pressure is excessive affects injection moulding,
After sizing material is extracted out from described appearance glue space 13; as shown in Figure 2; the actual pressure value that described first pressure sensor 8 detects can compare with the reference pressure value preset in the controller; when actual pressure is less than normal pressure; described controller controls drive rotating device 4 and rotates; sizing material is supplemented into described appearance glue space 13; avoid holding under remaining a small amount of sizing material is in hot environment for a long time in glue space 13 and cause carbonization; postpone sizing material carbonization time, improve sizing material carbonization problem and in order to avoid feed in raw material in time cause shutdown.
In preferred embodiments, as shown in Figure 5, the return valve 15 of described glue feeding opening 11 side relative to being arranged on it is communicated with, described return valve 15 is communicated with described appearance glue space 13 by return flow path 16, described return valve 15 is connected with return valve 15 cylinder 7, after mold cavity is full of sizing material, namely packing stage is entered, sizing material safety return-flow, backflow sizing material enters sebific duct connecting hole 14, when return pressure is comparatively large, washes described return valve 15 open, backflow sizing material is entered by return valve 15 and return flow path 16 and holds glue space 13, reaches the effect of safety return-flow.
In preferred embodiments, as shown in Figure 4, the side of described heater 6 is provided with the second pressure sensor 9, the collection terminal of described second pressure sensor 9 stretches in described sebific duct connecting hole 14, described second pressure sensor 9 is also connected with described controller, the pressure in sebific duct connecting hole 14 can be detected in real time and shown by controller, the pressure that described second pressure sensor 9 is detected is plastic emitting pressure, the result meeting feedback controller of detecting, air pressure proportioning valve is controlled by controller, control countercurrent pressure, injection pressure is stablized, the pressure that described second pressure sensor 9 is detected is bound to be greater than the pressure that the first pressure sensor 8 is detected, adverse current can be produced like this, to ensure the stability of plastic emitting.
In preferred embodiments, described heater 6 comprises multiple fire-bar, described multiple fire-bar is separately positioned in multiple through hole 61 running through described heater 6, described fire-bar can adopt conventional electrified regulation resistor stripe, specifically do not limit, and the number of through hole 61 and fire-bar is arranged as required.
In preferred embodiments, described through hole 61 is arranged preferably 8, and described through hole 61 is arranged on the side of described heater 6 uniformly.
In preferred embodiments, the aluminium block that described heater 6 is preferably overall because aluminium block lightweight, thermal conductivity good, is preferred material.
In preferred embodiments, described gun barrel 2 is all provided with diaphragm seal 12 with the junction of described heater 6 and upper seal support 3, and for ensureing sealing, minimizing air enters and contacts with sizing material, thus reduces sizing material carbonization.
Embodiment 2
Adopt an injection moulding process for the Novel screw type low-pressure injection molding machine described in embodiment 1, comprise the following steps:
Reinforced: sizing material particle enters in described gun barrel 2 from described barrel 1, and described drive rotating device 4 drives described screw rod 5 to rotate, described sizing material particle is moved downward along the screw thread of described screw rod 5 and enters in described appearance glue space 13;
Heating: the first order calandria on described gun barrel 2 outer wall, second level calandria and the classification of third level calandria are heated sizing material particle, make it plastify, and described heater 6 heats the sizing material in described appearance glue space 13;
Induction controls: described first pressure sensor 8 carries out Real-Time Monitoring to the pressure in described appearance glue space 13, and send the data to described controller, when described monitoring control devices is greater than predetermined maximum to the pressure in described appearance glue space 13, described controller sends order makes described drive rotating device 4 stop operating, stop feeding in raw material to equipment, described monitoring control devices to the pressure in described appearance glue space 13 lower than predetermined minimum value time, described controller sends order makes the described drive rotating device 4 stopped starting to rotate, and feeds in raw material to equipment;
Take out glue injecting glue: extracted out by the sizing material in described appearance glue space 13 by described plastic hole 10, and injected by described glue feeding opening 11, described sizing material enters next step processing link from described sebific duct connecting hole 14.
Above step is starting to add man-hour for carry out successively, but follow-up continue to carry out time, order does not limit, may after taking out glue injecting glue step, because sizing material reduces, may carry out induction and control and addition step, described heating steps carries out always, ensure that sizing material plastifies in time, other three steps start according to need of production.
Described first order calandria, second level calandria and third level calandria make described gun barrel 2 be divided into the first bringing-up section, the second bringing-up section and the 3rd bringing-up section; In described gun barrel 2, sizing material is graininess, semi-molten shape, fusing shape respectively in the first bringing-up section, the second bringing-up section and the 3rd bringing-up section; Described first bringing-up section temperature, the second bringing-up section temperature, the 3rd bringing-up section temperature do concrete temperature setting according to the characteristic of different sizing materials.
In preferred embodiments, further comprising the steps of: after sizing material is refluxed by sebific duct connecting hole 14, enter described return valve 15, after return pressure increases and washes return valve 15 open, sizing material is entered in described appearance glue space 13 by return flow path 16.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on description, must determine its technical scope according to right.