CN104494075A - Self-cleaning plunger type injection device and self-cleaning plunger type injection molding machine - Google Patents
Self-cleaning plunger type injection device and self-cleaning plunger type injection molding machine Download PDFInfo
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- CN104494075A CN104494075A CN201410834571.5A CN201410834571A CN104494075A CN 104494075 A CN104494075 A CN 104494075A CN 201410834571 A CN201410834571 A CN 201410834571A CN 104494075 A CN104494075 A CN 104494075A
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- Prior art keywords
- plunger
- melt
- self
- injection
- cleaning
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- 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
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- 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
- B29C45/036—Injection pistols
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- 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
- B29C45/586—Injection or transfer plungers
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a self-cleaning plunger type injection device. The self-cleaning plunger type injection device comprises an injection base, a plunger cylinder, a plunger and a linear actuator, wherein the plunger cylinder installed on the injection base is provided with a plunger moving cavity which runs through the plunger cylinder to form a melt outlet and an opening; the plunger is installed in the plunger moving cavity, and is actuated by the linear actuator; the plunger comprises a plunger head and a plunger body; the plunger body and the plunger cylinder are matched in a sealed mode; the end surface of the plunger body is an inclined surface; the outer diameter of the plunger head is less than the outer diameter of the plunger body, and the plunger head is installed on the inclined surface; an injection storage chamber is enclosed by the inclined surface, the plunger head and the plunger moving cavity positioned between the melt outlet and the inclined surface; the plunger cylinder is provided with a melt inlet along the radial direction of the plunger cylinder; the melt inlet and the melt outlet are independent with each other and are opposite to the inclined surface, so that melt which firstly enters the plunger cylinder is discharged firstly in the injection motion, and used melt is not accumulated in the plunger cylinder so as to achieve the aim of self-cleaning, and the product quality is improved. In addition, the invention also discloses a self-cleaning plunger type injection molding machine.
Description
Technical field
The present invention relates to a kind of injection molding art, particularly relate to a kind of the melt entered at first in plunger case is injected away at first when action of injection self-cleaning plunger injection device and self-cleaning plunger-type injection molding machine.
Background technology
Along with the development of economy and the continuous progress of society, for the production of people and life provide various material consumption product, thus enrich production and the life of people, and plasthetics is exactly the one of many material consumption product.
As everyone knows, in plastic cement device, much all obtained by injection technique, therefore accelerated the usage degree of injection machine.And for plunger-type injection molding machine, current existing plunger-type injection molding machine is made up of plasticizing part and injection portion substantially.Plasticizing part comprises machine barrel and screw rod, is responsible for plastic melt and pushes toward injection portion.Injection portion comprises triple valve, nozzle, plunger and plunger case, and triple valve controls the effect of melt flow direction.When screw front end stores enough volume required melts, the contact between machine barrel and plunger case opened by triple valve, and contacting simultaneously between shut-off nozzle and plunger case; Then, screw rod pushed forward, advances in plunger case by melt through triple valve, and plunger now retreats.After plunger case stores enough melts, the contact between nozzle and plunger case opened by triple valve now, and closes contacting between plunger case and machine barrel simultaneously; Now plunger pushes forward, by the melt in plunger case through triple valve and nozzle injection in mould, thus complete the injection process of injection machine.Although the injection machine of this working method has the advantage that injection speed is fast and injection pressure is large, there is following shortcoming:
The crucial original paper plunger case of such injection machine only has unique import and export, push whole process toward storing in plunger case and melt from plunger case toward nozzle from machine barrel at melt, that the melt of laggard plunger case pushes toward nozzle at first, and technique upper prop plug cylinder always needs to retain certain pressurize feeding melt, therefore when injection cycle work completes, the head of plunger case always leaves over a part of melt, and this part melt enters plunger case at first and stays always, every task all cannot discharge, melt of long duration can decompose blackening, produce decomposition gas, the quality of product is caused and has a strong impact on.On the other hand, when needing on producing to change processing colorless product into from processing colored product, often because this is left over melt and cannot remove and make the whole machine of cleaning bring difficulty.
Therefore, be badly in need of wanting a kind of self-cleaning plunger injection device and self-cleaning plunger-type injection molding machine to overcome above-mentioned defect.
Summary of the invention
An object of the present invention is to provide a kind of self-cleaning plunger injection device that the melt entered at first in plunger case can be made to inject away to reach self-cleaning at first when action of injection and improve product quality.
Another object of the present invention is to provide a kind of self-cleaning plunger-type injection molding machine that the melt entered at first in plunger case can be made to inject away to reach self-cleaning at first when action of injection and improve product quality.
For realizing above-mentioned object, the invention provides a kind of self-cleaning plunger injection device, comprising injection seat, plunger case, plunger and linear actuator.Described plunger case to be arranged on described injection seat and to have the movable chamber of a plunger, described plunger case is run through along the axis of described plunger case in the movable chamber of described plunger, and the movable chamber of described plunger makes the end of described plunger case front end form a melt outlet and make the end of described plunger case rear end form an opening.Described plunger is assemblied in the movable chamber of described plunger along the axis of described plunger case, and described linear actuator is arranged on described injection seat and orders about described plunger and do action of injection in described plunger case.The direction that described plunger is exported to described opening along described melt comprises stopper head and plunger body successively, described plunger body be sealed and matched with described plunger case and seal described opening export with described melt between be communicated with, and the end face of the front end of described plunger body is the inclined plane tilted along the axis of described plunger case, the external diameter of described stopper head is less than the external diameter of described plunger body and is arranged in described inclined plane, described inclined plane, stopper head and the movable chamber of the plunger between the outlet of described melt and inclined plane cross the injection locker room pushing the melt storage come for plasticizing apparatus institute jointly.Described plunger case offers along the radial direction of this plunger case the melt pushed for described plasticizing apparatus institute and enters melt entrance in described injection locker room, and described melt entrance and described melt export separate and facing with described inclined plane.
Preferably, described melt entrance is positioned at the upside place of described plunger case, and upper end and the described melt entrance of described inclined plane face, and the lower end of described inclined plane exports towards described melt.
Preferably, described stopper head and described plunger body are coaxial layout.
Preferably, one end of the contiguous described melt outlet of described stopper head is conical structure.
Preferably, described linear actuator has and orders about the first extreme position that described plunger exports away from described melt and the second extreme position near described melt outlet.
Preferably, described melt entrance is connected with described injection locker room when described plunger is positioned at described first extreme position.
Preferably, described melt entrance is connected with described injection locker room when described plunger is positioned at described second extreme position.
For realizing above-mentioned object, the plasticizing apparatus that self-cleaning plunger-type injection molding machine of the present invention comprises frame, nozzle and is arranged in described frame.Wherein, self-cleaning plunger-type injection molding machine of the present invention also comprises inlet valve, outlet valve and self-cleaning plunger injection device of the present invention.Described injection seat is arranged in described frame, described inlet valve is arranged between described plasticizing apparatus and plunger case, and described inlet valve opens or closes described melt entrance and being communicated with between described plasticizing apparatus, one end of described outlet valve is arranged on described plunger case, described nozzle is arranged on the other end of described outlet valve, and described outlet valve open or close described nozzle export with described melt between be communicated with.
Preferably, described plasticizing apparatus comprise the plasticizing seat be arranged in described frame, along the axis of described plunger case to be arranged on described plasticizing seat and be positioned at machine barrel above described plunger case, the screw rod that rotationally moves at described machine barrel and to be arranged on described plasticizing seat and to order about described screw rod power drill/driver in rotary moving.
Preferably, described inlet valve and outlet valve all comprise valve body, the spool reciprocatingly moved in described valve body and order about the valve oil cylinder of described spool movement.
Compared with prior art, due to plunger body to be sealed and matched with plunger case and sealed open to export with melt between be communicated with, the external diameter of stopper head is less than the external diameter of plunger body and is arranged in the inclined plane of the inclination of the axis along this plunger case of plunger body, this inclined plane, stopper head and the movable chamber of plunger between melt outlet and inclined plane cross the injection locker room pushing the melt storage come for plasticizing apparatus institute jointly, plunger case offers along the radial direction of this plunger case and pushes for plasticizing apparatus institute the melt come and enter the melt entrance injected in locker room, this melt entrance and melt export separate and facing with inclined plane, therefore plasticizing apparatus push come melt entered by melt entrance injection locker room in process in, under utilizing the inclination of inclined plane and melt to obtain the power of slide downward in inclined plane, the melt being flow to inclined plane place by melt entrance is automatically flowed to toward melt exit, the melt entered in injection storage chamber is made to form the type of flow of first in first out, avoid the mode first-in last-out of traditional plunger-type injection molding machine, efficiently solve melt because of problem such as long-time heating decomposition generation bad air and blackening coking etc.So self-cleaning plunger injection device of the present invention can make the melt entered at first in plunger case can inject away at first when action of injection, thus improves the quality of product, and reaches self-cleaning object.Just because self-cleaning plunger injection device of the present invention has self-cleaning ability, easily can realize the producer and convert different product color, reducing wastage of material and change clothes the time, therefore improve the adaptability of self-cleaning plunger injection device of the present invention; Again because self-cleaning plunger injection device of the present invention adopts plunger to realize injecting pressurize, compare screw of injection, its resistance is little and quality light, can realize high speed and high pressure injection.In like manner, because self-cleaning plunger-type injection molding machine of the present invention has self-cleaning plunger injection device of the present invention, therefore self-cleaning plunger-type injection molding machine of the present invention also has above-mentioned effect.
Accompanying drawing explanation
Fig. 1 is the perspective view of self-cleaning plunger-type injection molding machine of the present invention.
Fig. 2 is the internal structure schematic diagram of self-cleaning plunger-type injection molding machine of the present invention.
Fig. 3 is the perspective view of the plunger in self-cleaning plunger injection device of the present invention.
Fig. 4 is the schematic diagram that melt flows on the plunger shown in Fig. 3.
Fig. 5 is inlet valve in self-cleaning plunger-type injection molding machine of the present invention internal structure schematic diagram when being in closedown.
Fig. 6 is the internal structure schematic diagram that the inlet valve in self-cleaning plunger-type injection molding machine of the present invention is in when opening.
Fig. 7 is outlet valve in self-cleaning plunger-type injection molding machine of the present invention internal structure schematic diagram when being in closedown.
Fig. 8 is the internal structure schematic diagram that the outlet valve in self-cleaning plunger-type injection molding machine of the present invention is in when opening.
Fig. 9 a and Fig. 9 b is the workflow diagram of self-cleaning plunger-type injection molding machine of the present invention.
Detailed description of the invention
In order to describe technology contents of the present invention, structural feature in detail, accompanying drawing is coordinated to be described further below in conjunction with embodiment.
Refer to Fig. 1 and Fig. 2, self-cleaning plunger-type injection molding machine 100 of the present invention comprises frame 20, nozzle 30, the plasticizing apparatus 40 be arranged in frame 20, self-cleaning plunger injection device 10, inlet valve 50 and outlet valve 60.Particularly, as Fig. 1 and Fig. 2, and shown in Fig. 9 a and Fig. 9 b, plasticizing apparatus 40 comprises the plasticizing seat 41 be arranged in frame 20, axis along the plunger case 12 that the following describes is arranged on and plastifies on seat 41 and the machine barrel 42 be positioned at above plunger case 12, the screw rod 43 rotationally moved in machine barrel 42 and be arranged on plasticizing seat 41 on and order about screw rod 43 power drill/driver (not shown) in rotary moving, order about screw rod 43 by power drill/driver to rotate at machine barrel 42, the front end of granule materials toward machine barrel 42 is pushed, through extruding, the effects such as shearing and heating, granule materials melting is also put aside in the front end of machine barrel 42, the retrogressing and make machine barrel 42 vacate more storing spaces under the ordering about of power drill/driver of screw rod 43 now, preferably, plasticizing seat 41 is arranged on the rear end of frame 20, the space utilization of frame 20 to be got up better.
Refer to Fig. 1 to Fig. 4, and Fig. 9 a and Fig. 9 b, self-cleaning plunger injection device 10 comprises injection seat 11, plunger case 12, linear actuator 13 and plunger 14.Injection seat 11 is arranged in frame 20, particularly, as Fig. 1 and Fig. 2, and shown in Fig. 9 a and Fig. 9 b, injection seat 11 is the belows being positioned at machine barrel 42, is preferably, injection seat 11 is positioned at immediately below machine barrel 42, so that the melt at machine barrel 42 place pushes in plunger case 12.Plunger case 12 is arranged on injection seat 11, particularly, as Fig. 1 and Fig. 2, and shown in Fig. 9 a and Fig. 9 b, plunger case 12 is also arranged on the rear end of frame 20 and is positioned at the below of machine barrel 42, so that the melt at machine barrel 42 place flows in plunger case 12 under gravity with under the thrust of screw rod 43 more swimmingly, preferably, plunger case 12 is positioned at immediately below machine barrel 42; And plunger case 12 has the movable chamber 121 of a plunger, plunger case 12 is run through along the axis direction of arrow A indication (namely in Fig. 2) of plunger case 12 in the movable chamber 121 of this plunger, makes the end of plunger case 121 front end form a melt and exports 122 and make the end of plunger case 12 rear end form an opening 123.Plunger 14 is assemblied in the movable chamber 121 of plunger along the axis of plunger case 12, and the direction that plunger 14 exports 122 to opening 123 along melt comprises stopper head 141 and plunger body 142 successively, plunger body 142 is sealed and matched with plunger case 12 and sealed open 123 and melt export being communicated with between 122, particularly, as Fig. 1 and Fig. 2, and shown in Fig. 9 a and Fig. 9 b, realizing plunger body 142 with the mode of being sealed and matched of plunger case 12 is, plunger body 142 is assemblied in the movable chamber 121 of plunger, seal between the inwall forming the movable chamber 121 of plunger to make plunger body 142 and plunger case 12, the external world is flowed out along the axial of plunger case 12 by the cooperation place between plunger body 142 and the inwall forming the movable chamber 121 of plunger when plunger 14 does action of injection to prevent the melt entered in plunger case 12, thus guarantee that plunger 14 does on plunger case 12 and inject object reliably, will be understood that, because plunger body 142 is assemblied in the movable chamber 121 of plunger in interference fit, therefore the outside dimension of plunger body 142 equals or slightly larger than footpath, the chamber size in the movable chamber 121 of plunger.The end face of the front end of plunger body 142 is the inclined plane 1421 tilted along the axis of plunger case 12, and this inclined plane 1421 is more excellent is a plane, can also be curved surface etc. certainly, therefore not be limited with above-mentioned citing.
The external diameter of stopper head 141 is less than the external diameter of plunger body 142 and is arranged in inclined plane 1421; the part making inclined plane 1421 exceed stopper head 141 along the radial direction of plunger case 12 forms circular passage jointly with this stopper head 141; be preferably; stopper head 141 and plunger body 142 so that the formation of plunger 14 is processed, and guarantee circular passage uniformity everywhere in coaxial layout.Inclined plane 1421, stopper head 141 and the movable chamber 121 of plunger between melt outlet 122 and inclined plane 1421 jointly to cross for plasticizing apparatus 40 pushes the injection locker room 15 of the melt storage come, namely inject locker room 15 to surround by circular passage and in the movable chamber 121 of plunger that melt exports between 122 and inclined plane 1421, the movable chamber 121 of the plunger between melt outlet 122 and inclined plane 1421 can be regarded as the part between melt outlet 122 and inclined plane 1421 in the movable chamber 121 of plunger.Plunger case 12 along the radial direction of this plunger case 12 to offer for plasticizing apparatus 40 pushes the melt come and enters the melt entrance 123 injected in locker room 15, melt entrance 123 and melt export 122 separate, and melt entrance 123 is facing with inclined plane 1421, enter melt in injection locker room 15 to make plasticizing apparatus 40 by melt entrance 123 and first flow to inclined plane 1421, make flow of melt export 122 to melt by inclined plane 1421 again, realize the type of flow that the plasticizing apparatus melt be pushed in plunger case 12 forms first in first out.
Linear actuator 13 is arranged on injection seat 11, and linear actuator 13 orders about plunger 14 in plunger case 12, do action of injection, realizes plunger 14 and the melt entered in injection locker room 15 is expelled to the object of going in the external world; Preferably, linear actuator 13 is plunger cylinder, and the action of injection for plunger 14 provides stronger motive force and packing pressure.More specifically, melt entrance 124 is positioned at the upside place of plunger case 12, more excellently be, melt entrance 124 is positioned at the highest position on the upside of plunger case 12, inclined plane 1421 place is more easily flowed to make the melt entered in melt entrance 124, and melt entrance 124 is positioned at the rear of melt outlet 122 along the axis of plunger case 12, and export 122 with melt and adjacently to establish, upper end and the melt entrance 124 of inclined plane 1421 face, the lower end of inclined plane 1421 is towards melt outlet 122, thus reliably the melt be introduced into is pushed to melt by inclined plane 1421 and exports 122 places.Meanwhile, one end of the contiguous melt outlet 122 of stopper head 141 is conical structure 1411, and this conical structure 1411 mates with the end of the movable front end, chamber 121 of plunger, guarantees the reliability of plunger 14 in action of injection.Due to plunger 14 drive by plunger cylinder, therefore plunger cylinder have order about plunger 14 away from melt outlet 122 the first extreme position (see Fig. 9 a) and near melt outlet 122 the second extreme position (Fig. 9 b); When plunger 14 is positioned at the first extreme position as illustrated in fig. 9, melt entrance 124 is now connected with injection locker room 15, that is to say, the inclined plane of plunger 14 1421 and melt entrance 124 face and can be gone according to actual needs to adjust by plunger cylinder; When plunger 14 is positioned at the second extreme position as shown in figure 9b, melt entrance 124 is now connected with injection locker room 15, namely be plunger 14 when initial, melt entrance 124 faces with the inclined plane 1421 of plunger 14, is conducive to the pressurize of plunger cylinder to plunger 14.
Refer to Fig. 1 and Fig. 2, and Fig. 9 a and Fig. 9 b, inlet valve 50 is arranged between plasticizing apparatus 40 and plunger case 12, specifically, one end of inlet valve 50 is arranged on the front end place of the machine barrel 42 of plasticizing apparatus 40, the other end of inlet valve 50 is arranged on the position that plunger case 12 offers melt entrance 124, and inlet valve 50 opens or closes being communicated with between melt entrance 124 with plasticizing apparatus 40, to control machine barrel 42 toward conveyed melt in plunger case 12.Particularly, as shown in Figure 5 and Figure 6, inlet valve 50 comprises valve body 51, the spool 52 reciprocatingly moved in valve body 51 and orders about the valve oil cylinder 53 of spool 52 movement, to simplify the structure of inlet valve 50.And the operation principle of inlet valve 50 is, when valve oil cylinder 53 orders about the intercommunicating pore of spool 52 and the intercommunicating pore sequence of valve body 51 and is in state as shown in Figure 5, spool 52 now the intercommunicating pore of sealed valve body 51 and realize the function that inlet valve 50 cuts out; When the intercommunicating pore that valve oil cylinder 53 orders about spool 52 to communicate with the intercommunicating pore of valve body 51 and is in state as shown in Figure 6, spool 52 is now opened the intercommunicating pore of valve body 51 and is realized the function that inlet valve 50 opens.More specifically, the rear end of the valve body 51 of inlet valve 50 is arranged on the front end place of machine barrel 42, and the front end of the valve body 51 of inlet valve 50 is mounted in the position that plunger case 12 offers melt entrance 124.
Meanwhile, one end of outlet valve 60 is arranged on plunger case 12, and nozzle 30 is arranged on the other end of outlet valve 60, and outlet valve 60 opens or closes nozzle 30 exports being communicated with between 122 with melt, pushes toward nozzle 30 place to control the melt injected in locker room 15; Particularly, particularly, as shown in Figure 7 and Figure 8, outlet valve 60 comprises valve body 61, the spool 62 reciprocatingly moved in valve body 61 and orders about the valve oil cylinder 63 of spool 62 movement, to simplify the structure of outlet valve 60, and the operation principle of outlet valve 60 is, when valve oil cylinder 63 orders about the intercommunicating pore of spool 62 and the intercommunicating pore sequence of valve body 61 and is in state as shown in Figure 7, spool 62 now the intercommunicating pore of sealed valve body 61 and realize the function that inlet valve 60 cuts out; When the intercommunicating pore that valve oil cylinder 63 orders about spool 62 to communicate with the intercommunicating pore of valve body 61 and is in state as shown in Figure 8, spool 62 is now opened the intercommunicating pore of valve body 61 and is realized the function that outlet valve 60 opens.More specifically, the rear end of the valve body 61 of outlet valve 60 is arranged on the position that plunger case 12 offers melt outlet 12, and nozzle 30 is arranged on the front end of the valve body 61 of outlet valve 60 along the axis of plunger case 12.
By reference to the accompanying drawings, the operation principle of self-cleaning plunger-type injection molding machine of the present invention is described: when starting working, inlet valve 50 cuts out being communicated with between machine barrel 42 and the melt entrance 124 of plunger case 12, power drill/driver on plasticizing seat 41 orders about screw rod 43 and rotates in machine barrel 42, the front end of granule materials toward machine barrel 42 is pushed, through effects such as extruding, shearing and heating, granule materials melting is also put aside in the front end of machine barrel 42, and screw rod 43 now retreats and vacates more storing space.
After the front end of machine barrel 42 reaches predetermined melt amount, as shown in Figure 2, inlet valve 50 is opened, and screw rod 43 moves forward, is squeezed by the melt at machine barrel 42 front end place be advanced in the injection locker room 15 of plunger case 12 through inlet valve 50 and melt entrance 124.In the process that melt enters in injection locker room 15, melt moves forward along the inclined plane 1421 of plunger 14 at first, the front end of melt old in injection locker room 15 toward injection locker room 15 is pushed, force plunger 14 to retreat simultaneously, allow the continuous vacating space in the front end of plunger case 12 and expand injection locker room 15, old material now will accumulate in (namely inject locker room 15 foremost) foremost of plunger case.
As illustrated in fig. 9, plunger 14 still continues to retreat to vacate the melt volume needed for a shot, the melt at this time entering plunger case 12 can not impact the old material being in plunger 14 foremost position of last time injection, and the flow direction of melt on plunger 14 is as the arrow indication on the plunger 14 in Fig. 4.
As shown in figure 9b, after plunger case 12 reaches predetermined injection shot, inlet valve 50 now cuts out, simultaneously, outlet valve 60 is opened, plunger cylinder now promotes plunger 14 forward and travels forward, and the melt injected by plunger case 12 in locker room 15 is expelled in mould through melt outlet 122, outlet valve 50 and nozzle 30, completes a production cycle.Meanwhile, no longer leave the old material of last production cycle in plunger case 12, realize the self-cleaning function of plunger 14.
Compared with prior art, because plunger body 142 is sealed and matched with plunger case 12, sealed open 123 and melt export being communicated with between 122, the external diameter of stopper head 141 is less than the external diameter of plunger body 142 and is arranged in the inclined plane 1421 of the inclination of the axis along this plunger case 12 of plunger body 142, this inclined plane 1421, stopper head 141 and the movable chamber 121 of plunger between melt outlet 122 and inclined plane 1421 jointly to cross for plasticizing apparatus 40 pushes the injection locker room 15 of the melt storage come, plunger case 12 along the radial direction of this plunger case 12 to offer for plasticizing apparatus 40 pushes the melt come and enters the melt entrance 124 injected in locker room 15, this melt entrance 124 and melt export 122 separate and facing with inclined plane 1421, therefore plasticizing apparatus 40 push come melt entered by melt entrance 124 injection locker room 15 in process in, under utilizing the inclination of inclined plane 1421 and melt to obtain the power of slide downward in inclined plane 1421, the melt being flow to inclined plane 1421 place by melt entrance 124 is made automatically to export 122 places' flow directions toward melt, the melt entered in injection storage chamber 15 is made to form the type of flow of first in first out, avoid the mode first-in last-out of traditional plunger-type injection molding machine, efficiently solve melt because of problem such as long-time heating decomposition generation bad air and blackening coking etc.So self-cleaning plunger injection device 10 of the present invention can make the melt entered at first in plunger case 12 can inject away at first when action of injection, thus improves the quality of product, and reaches self-cleaning object.Just because self-cleaning plunger injection device 10 of the present invention has self-cleaning ability, easily can realize the producer and convert different product color, reducing wastage of material and change clothes the time, therefore improve the adaptability of self-cleaning plunger injection device 10 of the present invention; Again because self-cleaning plunger injection device 10 of the present invention adopts plunger 14 to realize injecting pressurize, compare screw of injection, its resistance is little and quality light, can realize high speed and high pressure injection.In like manner, because self-cleaning plunger-type injection molding machine 100 of the present invention has self-cleaning plunger injection device 10 of the present invention, therefore self-cleaning plunger-type injection molding machine 100 of the present invention also has above-mentioned effect, meanwhile, because self-cleaning plunger-type injection molding machine 100 of the present invention adopts the working method that screw rod 43 plastifies and plunger 14 is injected, at pressurize cooling Nie, screw rod 43 can carry out plasticizing work simultaneously, improves plasticizing efficiency.
The person of meriting attention, the foundation of the above-mentioned front end mentioned and rear end take Fig. 2 as benchmark, and wherein front end refers to the left side in Fig. 2, and rear end refers to the right side in Fig. 2, and the axis of plunger case 12 refers to the left and right directions in Fig. 2.
Above disclosedly be only preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a self-cleaning plunger injection device, comprise injection seat, plunger case, plunger and linear actuator, described plunger case to be arranged on described injection seat and to have the movable chamber of a plunger, described plunger case is run through along the axis of described plunger case in the movable chamber of described plunger, and the movable chamber of described plunger makes the end of described plunger case front end form a melt outlet and make the end of described plunger case rear end form an opening, described plunger is assemblied in the movable chamber of described plunger along the axis of described plunger case, described linear actuator is arranged on described injection seat and orders about described plunger and do action of injection in described plunger case, it is characterized in that, the direction that described plunger is exported to described opening along described melt comprises stopper head and plunger body successively, described plunger body be sealed and matched with described plunger case and seal described opening export with described melt between be communicated with, and the end face of the front end of described plunger body is the inclined plane tilted along the axis of described plunger case, the external diameter of described stopper head is less than the external diameter of described plunger body and is arranged in described inclined plane, described inclined plane, stopper head and the movable chamber of the plunger between the outlet of described melt and inclined plane cross the injection locker room pushing the melt storage come for plasticizing apparatus institute jointly, described plunger case offers along the radial direction of this plunger case the melt pushed for described plasticizing apparatus institute and enters melt entrance in described injection locker room, described melt entrance and described melt export separate and facing with described inclined plane.
2. self-cleaning plunger injection device as claimed in claim 1, is characterized in that, described melt entrance is positioned at the upside place of described plunger case, and upper end and the described melt entrance of described inclined plane face, and the lower end of described inclined plane exports towards described melt.
3. self-cleaning plunger injection device as claimed in claim 1, is characterized in that, described stopper head and described plunger body are coaxial layout.
4. self-cleaning plunger injection device as claimed in claim 1, is characterized in that, one end of the contiguous described melt outlet of described stopper head is conical structure.
5. self-cleaning plunger injection device as claimed in claim 1, is characterized in that, described linear actuator has orders about the first extreme position that described plunger exports away from described melt and the second extreme position near described melt outlet.
6. self-cleaning plunger injection device as claimed in claim 5, is characterized in that, described melt entrance is connected with described injection locker room when described plunger is positioned at described first extreme position.
7. self-cleaning plunger injection device as claimed in claim 5, is characterized in that, described melt entrance is connected with described injection locker room when described plunger is positioned at described second extreme position.
8. a self-cleaning plunger-type injection molding machine, comprise frame, nozzle and the plasticizing apparatus be arranged in described frame, it is characterized in that, described self-cleaning plunger-type injection molding machine also comprises inlet valve, outlet valve and the self-cleaning plunger injection device as described in any one of claim 1 to 7, described injection seat is arranged in described frame, described inlet valve is arranged between described plasticizing apparatus and plunger case, and described inlet valve opens or closes described melt entrance and being communicated with between described plasticizing apparatus, one end of described outlet valve is arranged on described plunger case, described nozzle is arranged on the other end of described outlet valve, and described outlet valve open or close described nozzle export with described melt between be communicated with.
9. self-cleaning plunger-type injection molding machine as claimed in claim 8, it is characterized in that, described plasticizing apparatus comprise the plasticizing seat be arranged in described frame, along the axis of described plunger case to be arranged on described plasticizing seat and be positioned at machine barrel above described plunger case, the screw rod that rotationally moves at described machine barrel and to be arranged on described plasticizing seat and to order about described screw rod power drill/driver in rotary moving.
10. self-cleaning plunger-type injection molding machine as claimed in claim 8, is characterized in that, described inlet valve and outlet valve all comprise valve body, the spool reciprocatingly moved in described valve body and order about the valve oil cylinder of described spool movement.
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| CN201410834571.5A CN104494075B (en) | 2014-12-26 | 2014-12-26 | Self-cleaning plunger type injection device and self-cleaning plunger type injection molding machine |
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| CN105922523A (en) * | 2016-06-27 | 2016-09-07 | 海天塑机集团有限公司 | Circulation structure of injection molding machine |
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| CN104494075B (en) | 2017-01-11 |
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