CN105108984A - Conversion valve device of on-line mixing injection molding machine and control method of conversion valve device - Google Patents

Conversion valve device of on-line mixing injection molding machine and control method of conversion valve device Download PDF

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Publication number
CN105108984A
CN105108984A CN201510520592.4A CN201510520592A CN105108984A CN 105108984 A CN105108984 A CN 105108984A CN 201510520592 A CN201510520592 A CN 201510520592A CN 105108984 A CN105108984 A CN 105108984A
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CN
China
Prior art keywords
channel
valve
injection
valve channel
pressurize
Prior art date
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Pending
Application number
CN201510520592.4A
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Chinese (zh)
Inventor
汉斯·沃伯
陈炽辉
施海明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Shuangma Machinery Industry Co Ltd
Original Assignee
Ningbo Shuangma Machinery Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Shuangma Machinery Industry Co Ltd filed Critical Ningbo Shuangma Machinery Industry Co Ltd
Priority to CN201510520592.4A priority Critical patent/CN105108984A/en
Publication of CN105108984A publication Critical patent/CN105108984A/en
Priority to CN201610388047.9A priority patent/CN106042260B/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/762—Measuring, controlling or regulating the sequence of operations of an injection cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
    • F16K11/0856—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76648—Sequence, e.g. the order in which operations are conducted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76655—Location of control
    • B29C2945/76658—Injection unit

Abstract

The invention discloses a conversion valve device of an on-line mixing injection molding machine. The conversion valve device comprises a valve body and a valve element, wherein the valve element is located in the valve body. The conversion valve device is characterized in that the valve body is provided with a first valve body passage, a second valve body passage, a third valve body passage and a fourth valve body passage which are communicated with an extrusion machine, an injection cylinder, a pressure maintaining cylinder and a jet nozzle in the on-line mixing injection molding machine in a one-to-one correspondence mode; a metering passage set, an injection passage set and a pressure maintaining passage set which are distributed at intervals in the axial direction and are mutually independent are arranged in the valve element; the valve body is provided with a valve element movement driving mechanism. The conversion valve device has the advantages that the valve element is provided with the pressure maintaining passage, so that materials are fed into the injection cylinder in the pressure maintaining stage; compared with a traditional on-line mixing injection molding machine, under the condition of the same runner size, by using the conversion valve device, the formation period of the on-line mixing injection molding machine can be shortened, and the production efficiency can be improved by 10-20%.

Description

A kind of switching-valve arrangement of online mixing injection machine and control method thereof
Technical field
The present invention relates to online mixing injection machine, namely the equipment that injection machine and extruder are combined, particularly relate to a kind of switching-valve arrangement and control method thereof of online mixing injection machine.
Background technology
As everyone knows, injection machine and injection molding process are widely used in the manufacture of plastic items.At present, injection machine and extruder are essentially two kinds of independently equipment, and extruder mainly carries out modification granulation to raw materials for plastics production, and modification granulation material is carried out injection mo(u)lding by injection machine, are equivalent to " two-step method " shaping.But this forming method not only makes cost of material higher, and in injection molding process, plastics modification granulation and shaping time through twice heating, this causes the damage of the molecular structure of plastics comparatively serious, affects the quality and performance of plastic products.
In order to reduce cost of material, improve the quality and performance of plastic products, abroad someone designs online mixing injection machine, namely injection machine and extruder are combined, it is integrated with the compounding function of plastics of extruder and the shaping function of injection machine, the direct compounding moulded plastic products of raw material can be used, realize " one-step method " shaping.Period, as long as plastic pellet is through once heating, reducing the damage to plastic molecules structure, improve the quality and performance of plastic products.But current online mixing injection machine, it is expelled to plastic melt after in mould by injection cylinder, and by injection cylinder setting time in melt pressurize, this makes its molding cycle relatively long, production efficiency need improve.
Summary of the invention
Technical problem to be solved by this invention is to provide one can shorten molding cycle, the switching-valve arrangement of the online mixing injection machine of enhancing productivity and control method thereof.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of switching-valve arrangement of online mixing injection machine, comprise valve body and spool, described spool is arranged in described valve body and can slides at described valve body, described valve body is provided with respectively with the extruder in online mixing injection machine, injection cylinder, the first valve channel that pressurize cylinder is communicated with nozzle one_to_one corresponding, second valve channel, 3rd valve channel and the 4th valve channel, measurement channel group spaced apart and separate is vertically provided with in described spool, injection canal group and pressurize passage group, described valve body is provided with spool moving drive mechanism, under the driving of described spool moving drive mechanism, in whole injection molding process, at metering phase, described measurement channel group respectively with the first described valve channel, the second described valve channel is connected with the 3rd described valve channel, at injection stage, described injection canal group respectively with the first described valve channel, the second described valve channel, the 3rd described valve channel is connected with the 4th described valve channel, at packing stage, the first valve channel that described pressurize channel constituents is other and described, the second described valve channel, the 3rd described valve channel is connected with the 4th described valve channel.
Described measurement channel group comprises the first measurement channel and the second measurement channel, the first described measurement channel and the first described valve channel, the second described valve channel is connected, the second described measurement channel and the second described valve channel, the 3rd described valve channel is connected, described injection canal group comprises the first injection canal and the second injection canal, the first described injection canal and the first described valve channel, the 3rd described valve channel is connected, the second described injection canal and the second described valve channel, the 4th described valve channel is connected, described pressurize passage group comprises the first pressurize passage and the second pressurize passage, the first described pressurize passage and the first described valve channel, the second described valve channel is connected, the second described pressurize passage and the 3rd described valve channel, the 4th described valve channel is connected.
Described measurement channel group, described injection canal group and described pressurize passage group are arranged in order and are along the circumferential direction staggeredly located out in described spool.
Described spool moving drive mechanism is oscillating motor, and the cylinder body of described oscillating motor is fixedly connected on described valve body, and the driving shaft of described oscillating motor is fixedly connected with described spool.
Described spool moving drive mechanism comprises hydraulic cylinder and motor, and the driving shaft of described motor is fixedly connected with the cylinder body of described hydraulic cylinder, and the driving shaft of described hydraulic cylinder is fixedly connected with described spool.
Utilize a control method for described switching-valve arrangement, comprise following concrete steps:
(1), spool moving drive mechanism drives spool to move, measurement channel group is connected with the 3rd valve channel with the first valve channel, the second valve channel respectively, namely switching-valve arrangement is in metering phase, and the plastic melt melted and mix continuously is clamp-oned in injection cylinder through the first measurement channel by the extruder in online mixing injection machine;
(2), when the plastic melt in injection cylinder reaches after metering stroke, spool moving drive mechanism drives spool to move, the first injection canal in injection canal group is connected with the first valve channel, the 3rd valve channel, second injection canal is connected with the second valve channel, the 4th valve channel, namely switching-valve arrangement is in injection stage, plastic melt is pushed injection mo(u)lding in mould through the second injection canal, nozzle by injection cylinder, meanwhile, plastic melt is clamp-oned in pressurize cylinder through the first injection canal by extruder;
(3) after, injection terminates, spool moving drive mechanism drives spool to move, the first pressurize passage in pressurize passage group is connected with the first valve channel, the second valve channel, second pressurize passage is connected with the 3rd valve channel, the 4th valve channel, and namely switching-valve arrangement is in packing stage, now, plastic products in mould carry out pressurize under the effect of pressurize cylinder, meanwhile, plastic melt is clamp-oned in injection cylinder through the first pressurize passage by extruder, starts to measure stroke;
(4) after, pressurize terminates, spool moving drive mechanism drives spool to move, measurement channel group is connected with the 3rd valve channel with the first valve channel, the second valve channel respectively, namely switching-valve arrangement is in metering phase, plastic melt is injected injection cylinder through the first measurement channel and the second measurement channel by extruder and pressurize cylinder respectively, carries out injection cycle circulation.
Compared with prior art, advantage of the present invention is owing to spool being provided with pressurize passage, injection cylinder is made just to carry out charging at packing stage, compared with traditional online mixing injection machine, when identical channel size, adopt this switching-valve arrangement, can shorten the molding cycle of online mixing injection machine, production efficiency can improve 10 ~ 20%; If when identical molding cycle, adopt this switching-valve arrangement, the channel size of online mixing injection machine can be made to reduce about 15%, make the more compact structure of online mixing injection machine, reduce equipment cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention in conjunction with injection cylinder, pressurize cylinder, nozzle;
Fig. 2 is the stereogram of the spool of the embodiment of the present invention one;
Fig. 3 is the cooperation schematic diagram of the present invention at metering phase;
Fig. 4 is the cooperation schematic diagram of the present invention at injection stage;
Fig. 5 is the cooperation schematic diagram of the present invention at packing stage;
Fig. 6 is the cooperation schematic diagram of the present invention at metering phase;
Fig. 7 is the stereogram of the spool of the embodiment of the present invention two;
Fig. 8 is the action timing diagram of the online mixing injection machine of tradition;
Fig. 9 is action timing diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one: as shown in the figure, a kind of switching-valve arrangement of online mixing injection machine, comprise valve body 1 and spool 2, spool 2 is arranged in valve body 1 and can slides at valve body 1, valve body 1 is provided with respectively with the extruder 3 in online mixing injection machine, injection cylinder 4, the first valve channel 11 that pressurize cylinder 5 is communicated with nozzle 6 one_to_one corresponding, second valve channel 12, 3rd valve channel 13 and the 4th valve channel 14, measurement channel group 21 spaced apart and separate is vertically provided with in spool 2, injection canal group 22 and pressurize passage group 23, measurement channel group 21, injection canal group 22 and pressurize passage group 23 are arranged in order and are along the circumferential direction staggeredly located out in spool 2, measurement channel group 21 comprises the first measurement channel 211 and the second measurement channel 212, injection canal group 22 comprises the first injection canal 221 and the second injection canal 222, pressurize passage group 23 comprises the first pressurize passage 231 and the second pressurize passage 232, valve body 1 is provided with oscillating motor (not shown), the cylinder body of oscillating motor is fixedly connected on valve body 1, the driving shaft of oscillating motor is fixedly connected with spool 2, under the driving of oscillating motor, in whole injection molding process, at metering phase, first measurement channel 211 and the first valve channel 11, second valve channel 12 is connected, second measurement channel 212 and the second valve channel 12, 3rd valve channel 13 is connected, at injection stage, first injection canal 221 and the first valve channel 11, 3rd valve channel 13 is connected, second injection canal 222 and the second valve channel 12, 4th valve channel 14 is connected, at packing stage, first pressurize passage 231 and the first valve channel 11, second valve channel 12 is connected, second pressurize passage 232 and the 3rd valve channel 13, 4th valve channel 14 is connected.
Embodiment two: as shown in the figure, a kind of switching-valve arrangement of online mixing injection machine, comprise valve body 1, spool 2, the hydraulic cylinder (not shown) of motor and linear motion type, spool 2 is arranged in valve body 1 and can slides at valve body 1, valve body 1 is provided with respectively with the extruder 3 in online mixing injection machine, injection cylinder 4, the first valve channel 11 that pressurize cylinder 5 is communicated with nozzle 6 one_to_one corresponding, second valve channel 12, 3rd valve channel 13 and the 4th valve channel 14, measurement channel group 21 spaced apart and separate is vertically provided with in spool 2, injection canal group 22 and pressurize passage group 23, measurement channel group 21, injection canal group 22 and pressurize passage group 23 are arranged in order and just right vertically in spool 2, measurement channel group 21 comprises the first measurement channel 211 and the second measurement channel 212, injection canal group 22 comprises the first injection canal 221 and the second injection canal 222, pressurize passage group 23 comprises the first pressurize passage 231 and the second pressurize passage 232, the driving shaft of motor is fixedly connected with the cylinder body of hydraulic cylinder, the driving shaft of hydraulic cylinder is fixedly connected with spool 2, under the driving of hydraulic cylinder, in whole injection molding process, at metering phase, first measurement channel 211 and the first valve channel 11, second valve channel 12 is connected, second measurement channel 212 and the second valve channel 12, 3rd valve channel 13 is connected, at injection stage, first injection canal 221 and the first valve channel 11, 3rd valve channel 13 is connected, second injection canal 222 and the second valve channel 12, 4th valve channel 14 is connected, at packing stage, first pressurize passage 231 and the first valve channel 11, second valve channel 12 is connected, second pressurize passage 232 and the 3rd valve channel 13, 4th valve channel 14 is connected.
Utilize a control method for the switching-valve arrangement of above-described embodiment one, comprise following concrete steps:
(1), oscillating motor drives spool 2 to move, measurement channel group 21 is connected with the 3rd valve channel 13 with the first valve channel 11, second valve channel 12 respectively, namely switching-valve arrangement is in metering phase, as shown in Figure 3, the plastic melt melted and mix continuously is clamp-oned in injection cylinder 4 through the first measurement channel 211 by the extruder 3 in online mixing injection machine;
(2), when the plastic melt in injection cylinder 4 reaches after metering stroke, oscillating motor drives spool 2 to move, make the first injection canal 221 and the first valve channel 11 in injection canal group 22, 3rd valve channel 13 is connected, second injection canal 222 and the second valve channel 12, 4th valve channel 14 is connected, namely switching-valve arrangement is in injection stage, as shown in Figure 4, injection cylinder 4 by plastic melt through the second injection canal 222, nozzle 6 pushes injection mo(u)lding in mould, simultaneously, plastic melt is clamp-oned in pressurize cylinder 5 through the first injection canal 221 by extruder 3,
(3) after, injection terminates, oscillating motor drives spool 2 to move, the first pressurize passage 231 in pressurize passage group 23 is connected with the first valve channel 11, second valve channel 12, second pressurize passage 232 is connected with the 3rd valve channel 13, the 4th valve channel 14, namely switching-valve arrangement is in packing stage, as shown in Figure 5, now, plastic products in mould carry out pressurize under the effect of pressurize cylinder 5, simultaneously, plastic melt is clamp-oned in injection cylinder 4 through the first pressurize passage 231 by extruder 3, starts to measure stroke;
(4) after, pressurize terminates, oscillating motor drives spool 2 to move, measurement channel group 21 is connected with the 3rd valve channel 13 with the first valve channel 11, second valve channel 12 respectively, namely switching-valve arrangement is in metering phase, as shown in Figure 6, plastic melt is injected injection cylinder 4 through the first measurement channel 211 and the second measurement channel 212 by extruder 3 and pressurize cylinder 5 respectively, carries out injection cycle circulation.
Utilize a control method for the switching-valve arrangement of above-described embodiment two, comprise following concrete steps:
(1), Driven by Hydraulic Cylinder spool 2 moves, measurement channel group 21 is connected with the 3rd valve channel 13 with the first valve channel 11, second valve channel 12 respectively, namely switching-valve arrangement is in metering phase, as shown in Figure 3, the plastic melt melted and mix continuously is clamp-oned in injection cylinder 4 through the first measurement channel 211 by the extruder 3 in online mixing injection machine;
(2), when the plastic melt in injection cylinder 4 reaches after metering stroke, Driven by Hydraulic Cylinder spool 2 moves, the first injection canal 221 in injection canal group 22 is connected with the first valve channel 11, the 3rd valve channel 13, second injection canal 222 is connected with the second valve channel 12, the 4th valve channel 14, namely switching-valve arrangement is in injection stage, as shown in Figure 4, plastic melt is pushed injection mo(u)lding in mould through the second injection canal 222, nozzle 6 by injection cylinder 4, meanwhile, plastic melt is clamp-oned in pressurize cylinder 5 through the first injection canal 221 by extruder 3;
(3) after, injection terminates, Driven by Hydraulic Cylinder spool 2 moves, the first pressurize passage 231 in pressurize passage group 23 is connected with the first valve channel 11, second valve channel 12, second pressurize passage 232 is connected with the 3rd valve channel 13, the 4th valve channel 14, namely switching-valve arrangement is in packing stage, as shown in Figure 5, now, plastic products in mould carry out pressurize under the effect of pressurize cylinder 5, simultaneously, plastic melt is clamp-oned in injection cylinder 4 through the first pressurize passage 231 by extruder 3, starts to measure stroke;
(4), after pressurize terminates, motor driving hydraulic cylinder rotates, be with movable valve plug 2 synchronous axial system simultaneously, after turning over an angle, motor quits work, Driven by Hydraulic Cylinder spool 2 gets back to axial original position, then motor driving hydraulic cylinder reversion, after being with movable valve plug 2 to rotate backward equal angular simultaneously, make measurement channel group 21 respectively with the first valve channel 11, second valve channel 12 is connected with the 3rd valve channel 13, namely switching-valve arrangement is in metering phase, as shown in Figure 6, plastic melt is injected injection cylinder 4 through the first measurement channel 211 and the second measurement channel 212 by extruder 3 and pressurize cylinder 5 respectively, carry out injection cycle circulation.
Illustrate: the heavy 5kg of the plastic products of injection moulding is wanted in setting, in online mixing injection machine, the output of extruder is 7.5kg/ minute, i.e. 125g/ second, injection cycle is 40 seconds, and wherein the time devided modulation in each stage is: inject 5 seconds, pressurize 5 seconds, cooling 15 seconds, die sinking 5 seconds, eject pickup 5 seconds, matched moulds 5 seconds.
If adopt traditional device, due to its by injection cylinder setting time in melt pressurize, this makes the storing time of pressurize cylinder be 10 seconds, and the feed time of injection cylinder is 30 seconds, the maximum flow rate of melt is 5000g ÷ 30s=167g/s, and its action timing diagram is shown in Fig. 8.
Adopt this device, owing to passing through the 5 pairs of melt pressurizes of pressurize cylinder, the storing time of pressurize cylinder 5 is 5 seconds, injection cylinder 4 holds extruder 3 material out between hold period, held from extruder 3 and pressurize cylinder 5 material out in remaining 30 seconds, therefore, the feed time of injection cylinder is total up to 35 seconds, the maximum flow rate of melt is 5000g ÷ 35s=143g/s, and its action timing diagram is shown in Fig. 9.Can obtain accordingly, when identical injection cycle, adopt the channel size of this device can reduce about 15% than conventional apparatus, make the more compact structure of online mixing injection machine; If keep channel size identical, then adopt this switching-valve arrangement that injection cycle can be made to shorten about 15%, production efficiency is improved.

Claims (6)

1. the switching-valve arrangement of an online mixing injection machine, comprise valve body and spool, described spool is arranged in described valve body and can slides at described valve body, it is characterized in that described valve body is provided with respectively with the extruder in online mixing injection machine, injection cylinder, the first valve channel that pressurize cylinder is communicated with nozzle one_to_one corresponding, second valve channel, 3rd valve channel and the 4th valve channel, measurement channel group spaced apart and separate is vertically provided with in described spool, injection canal group and pressurize passage group, described valve body is provided with spool moving drive mechanism, under the driving of described spool moving drive mechanism, in whole injection molding process, at metering phase, described measurement channel group respectively with the first described valve channel, the second described valve channel is connected with the 3rd described valve channel, at injection stage, described injection canal group respectively with the first described valve channel, the second described valve channel, the 3rd described valve channel is connected with the 4th described valve channel, at packing stage, the first valve channel that described pressurize channel constituents is other and described, the second described valve channel, the 3rd described valve channel is connected with the 4th described valve channel.
2. the switching-valve arrangement of a kind of online mixing injection machine as claimed in claim 1, it is characterized in that described measurement channel group comprises the first measurement channel and the second measurement channel, the first described measurement channel and the first described valve channel, the second described valve channel is connected, the second described measurement channel and the second described valve channel, the 3rd described valve channel is connected, described injection canal group comprises the first injection canal and the second injection canal, the first described injection canal and the first described valve channel, the 3rd described valve channel is connected, the second described injection canal and the second described valve channel, the 4th described valve channel is connected, described pressurize passage group comprises the first pressurize passage and the second pressurize passage, the first described pressurize passage and the first described valve channel, the second described valve channel is connected, the second described pressurize passage and the 3rd described valve channel, the 4th described valve channel is connected.
3. the switching-valve arrangement of a kind of online mixing injection machine as claimed in claim 1, is characterized in that described measurement channel group, described injection canal group and described pressurize passage group are arranged in order and are along the circumferential direction staggeredly located out in described spool.
4. the switching-valve arrangement of a kind of online mixing injection machine as claimed in claim 3, it is characterized in that described spool moving drive mechanism is oscillating motor, the cylinder body of described oscillating motor is fixedly connected on described valve body, and the driving shaft of described oscillating motor is fixedly connected with described spool.
5. the switching-valve arrangement of a kind of online mixing injection machine as described in claim 1 or 3, it is characterized in that described spool moving drive mechanism comprises hydraulic cylinder and motor, the driving shaft of described motor is fixedly connected with the cylinder body of described hydraulic cylinder, and the driving shaft of described hydraulic cylinder is fixedly connected with described spool.
6. utilize a control method for switching-valve arrangement as claimed in claim 2, it is characterized in that comprising following concrete steps:
(1), spool moving drive mechanism drives spool to move, measurement channel group is connected with the 3rd valve channel with the first valve channel, the second valve channel respectively, namely switching-valve arrangement is in metering phase, and the plastic melt melted and mix continuously is clamp-oned in injection cylinder through the first measurement channel by the extruder in online mixing injection machine;
(2), when the plastic melt in injection cylinder reaches after metering stroke, spool moving drive mechanism drives spool to move, the first injection canal in injection canal group is connected with the first valve channel, the 3rd valve channel, second injection canal is connected with the second valve channel, the 4th valve channel, namely switching-valve arrangement is in injection stage, plastic melt is pushed injection mo(u)lding in mould through the second injection canal, nozzle by injection cylinder, meanwhile, plastic melt is clamp-oned in pressurize cylinder through the first injection canal by extruder;
(3) after, injection terminates, spool moving drive mechanism drives spool to move, the first pressurize passage in pressurize passage group is connected with the first valve channel, the second valve channel, second pressurize passage is connected with the 3rd valve channel, the 4th valve channel, and namely switching-valve arrangement is in packing stage, now, plastic products in mould carry out pressurize under the effect of pressurize cylinder, meanwhile, plastic melt is clamp-oned in injection cylinder through the first pressurize passage by extruder, starts to measure stroke;
(4) after, pressurize terminates, spool moving drive mechanism drives spool to move, measurement channel group is connected with the 3rd valve channel with the first valve channel, the second valve channel respectively, namely switching-valve arrangement is in metering phase, plastic melt is injected injection cylinder through the first measurement channel and the second measurement channel by extruder and pressurize cylinder respectively, carries out injection cycle circulation.
CN201510520592.4A 2015-08-24 2015-08-24 Conversion valve device of on-line mixing injection molding machine and control method of conversion valve device Pending CN105108984A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201510520592.4A CN105108984A (en) 2015-08-24 2015-08-24 Conversion valve device of on-line mixing injection molding machine and control method of conversion valve device
CN201610388047.9A CN106042260B (en) 2015-08-24 2016-06-02 A kind of online switching-valve arrangement and its control method for being kneaded injection molding machine

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Application publication date: 20151202