CN103231494B - Injection mould with rapidly-replaced mould cores - Google Patents

Injection mould with rapidly-replaced mould cores Download PDF

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Publication number
CN103231494B
CN103231494B CN201310146657.4A CN201310146657A CN103231494B CN 103231494 B CN103231494 B CN 103231494B CN 201310146657 A CN201310146657 A CN 201310146657A CN 103231494 B CN103231494 B CN 103231494B
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core
mould
core rod
cover half
moving
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CN103231494A (en
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陈琪
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GUANGZHOU MODERN PLASTIC CO Ltd
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GUANGZHOU MODERN PLASTIC CO Ltd
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Abstract

The invention discloses an injection mould with rapidly-replaced mould cores. The injection mould is composed of a movable mould and a stationary mould, wherein a main body of the movable mould is composed of a movable mould base and a movable mould core movably arranged on the movable mould base; a main body of the stationary mould is composed of a stationary mould base and a stationary mould core movably arranged on the stationary mould base; the butt joint faces of the movable mould base and the stationary mould base are respectively provided with a mould core mounting sliding chute which horizontally extends from front to back; at least the front ends of the mould core mounting sliding chutes are provided with plug-in mounting holes for mounting or dismounting the mould cores; the mould cores are provided with tracks matched with the mould core mounting sliding chutes so as to move along the mould core mounting sliding chutes; and the mould cores are inserted to or dismounted from the mould core mounting sliding chutes on the mould bases through the plug-in mounting holes, thus the mould cores are replaced. According to the invention, only one set of mould base needs to be manufactured to be matched with the mould cores of different cavities which are manufactured according to spline standards tested based on different performance indexes; the mould replacing operation is easier and more convenient than that of the prior art, so that the mould replacing time is greatly shortened; and the manufacturing cost of various test spline moulds can also be greatly reduced.

Description

A kind of injection mold of fast changeable core rod
Technical field
The present invention relates to a kind of mould, particularly relate to a kind of injection mold of fast changeable core rod, be applicable to injection moulding and make plastic standard test bars, plastic products, rubber etc.
Background technology
Synthetic material (comprising plastics, rubber etc. material modified) is one of important making material of article used in people's daily life.In recent years, along with improving constantly of every field technical merit, to the requirement also corresponding raising of synthetic material, such as in automotive field, some auto parts must possess performance that is high temperature resistant, high strength, and some parts as upholstery then requires to possess good surface smoothness, less proportion and suitable toughness; In field of household appliances, the plastic casing of electric equipment products requires to have certain presentation quality, heat resistance and fire resistance in a certain temperature range.In addition, in order to reduce the cost of manufacture of some product, a large amount of inorganic fillings can be added in the plastic, and the increase of inorganic fillings also will inevitably have an impact to the performance of plastics.
Based on above various requirement and the impact adding inorganic fillings, material must carry out detecting to check it whether to meet the performance requirement of product before making finished product, existing common way is test bars material injection being become various various criterion, these test bars divide with test performance project difference, whether conventional test bars is various mechanical test batten (see Fig. 9 and Figure 15), flame retardant test batten, heatproof test bars etc., then can test standard batten Progressive symmetric erythrokeratodermia it can be checked to meet the requirements.In addition, in China's manufacturing industry foreign trade cooperation, be generally produce plastic standard test bars by us, give foreign side and detect voluntarily, if the performance of the performance of batten and material self has larger difference, make batten can not objective reality reflection material performance, test result just may be caused defective, and cause the order of trade cooperation to be difficult to implement and perform, this will directly affect the economic benefit of enterprise, what is more, potential threat can be caused to the existence of industry enterprise.
As from the foregoing, the performance of standard testing batten directly affects the result of testing of materials, and the performance indications of material directly can affect again the quality of product, and the mould of the performance indications of batten and injection moulding batten is closely bound up.Traditional injection moulding standard batten mould is concentrated on by conventional various battens in one set of die and made by an injection moulding, and namely no matter need any batten, all formed by same mold injection, therefore traditional mould exists following defect:
(1). the Shooting Technique of various batten all has difference, and various batten all concentrates in same mould and makes by existing mold, the Shooting Technique requirement of various batten cannot be met simultaneously, be easy to make test bars quality distortion, the performance of material can not be reflected objective reality.The trend of such as tensile bars to molecule has certain requirement, thicker batten then requires the long dwell time and that the contraction of batten is controlled to is minimum, require very fast injection speed during the thin batten of injection moulding comparison and just can be full of die cavity, obviously, no matter adopt which kind of Shooting Technique, all can not meet the Shooting Technique requirement of all battens simultaneously.
(2). the various battens of same material need to test a variety of performance indications, and the project that different materials is tested at different times is not identical yet, needs to carry out the standard batten of whole test index so adopt same mould not produce,
Therefore conventional in the prior art another kind of mode is, carry out the batten of different performance index test as required to change corresponding mould, and existing mould is generally made up of the dynamic model c be arranged on respectively on Injection Motor Template a and solid plate b and cover half d, wherein, the profiled part e formed primarily of punch and die is also included in dynamic model c and cover half d, be positioned at the running gate system f on cover half, be positioned at the ejecting mechanism g for the demoulding on dynamic model, guarantee the constitutional details etc. such as the guiding parts h of the accurate centering of dynamic model and the cover half energy when matched moulds, punch and die divide the land area place (see Figure 20) being located at dynamic model c and cover half d.When needs more mold exchange time, must by dynamic model and cover half be whole disassembles from injection machine, change another whole set of die, its weak point is:
(1). mould volume is huge and heavier, complicated with the assembling of injection machine, the labour intensity of operating personnel is very large, the whole process of more mold exchange is made often to need to spend about 45 minutes to one hour, and, the concrete condition of injection machine and mould, the physical efficiency of operating personnel, skilled operation degree all can have an impact to replacing efficiency, and directly affect the production efficiency of batten.
(2). the applicable limitation of existing mold to material is larger, be only applicable to the material that soft durometer is moderate, when batten is taken out in mould die sinking, the mode that usual employing ejects, namely several positions of selected batten are as the application point ejected, if batten material hardness is higher, due to the die cavity wall adhesion of batten and mould, there will be the phenomenon of demoulding difficulty, if now forced demoulding, the performance of batten will be affected, and when carrying out extension test, batten easily breaks at the changeover portion between gripping section and active section; If batten material hardness is lower, batten can deform after demoulding, is unfavorable for the test of batten performance indications.Described batten distortion refers to that batten produces draw taper, namely refer to that the shape of cross section of batten is up big and down small upside-down trapezoid, when calculating tensile strength (MPa), need to measure the area of cross section, general employing vernier caliper measurement, but slide measure can only measure the numerical value on top margin (longer limit), therefore the area of the cross section of gained can be greater than actual numerical value, and the tensile strength finally drawn will be less than real data, cause test data inaccurate, easily cause was that batten up to standard surveys into batten not up to standard originally, in this case, quite unfavorable to providing the manufacturing enterprise of batten.
Summary of the invention
The object of the present invention is to provide a kind of injection mold of fast changeable core rod, realize quick die change by changing core rod, core rod volume is little and lightweight, reduces the requirement of muscle power to operator and skilled operation degree, accelerate die change speed, improve the production efficiency of moulding.
Above-mentioned purpose of the present invention can be realized by following technical measures: a kind of injection mold of fast changeable core rod, be made up of dynamic model and cover half, wherein, described dynamic model and cover half include profiled part, ejecting mechanism, mould guiding parts and running gate system, it is characterized in that: dynamic model main body is made up of dynamic model frame and the moving-mould-core be movably arranged on dynamic model frame, cover half main body is then made up of cover half frame and the cover half core be movably arranged on cover half frame, dynamic model frame and cover half frame are referred to as mould bases, moving-mould-core and cover half core are referred to as core rod, described core rod is the mobilizable profiled part be separated with mould bases, described core rod is cube shaped blocks, injection moulding die cavity is located in described core rod, by the die cavity be at least arranged on described moving-mould-core or cover half core land area dynamic, complete injection moulding die cavity is formed after cover half core matched moulds, described moving-mould-core and cover half core make the land area of two core rods engage respectively by dynamic model frame docks mutually with cover half frame and realize matched moulds, described cover half frame has the injection moulding jack for grafting injection machine injection nozzle, and this injection moulding jack is communicated with the injection moulding die cavity on core rod by passage, the interface of described dynamic model frame and cover half frame has core rod that an anterior-posterior horizontal extends respectively chute is installed, described core rod installation chute at least has the plug-in mounting mouth for loading and unloading described core rod in its front end, described core rod is provided with the track installing chute adaptation with described core rod and moves to make core rod install chute along core rod, and insert by described plug-in mounting mouth or split out from the core rod installation chute described mould bases, thus realize the replacing of core rod.
Advantage of the present invention is, only need make a set of mould bases, just can the core rod of different die cavitys that makes according to the batten standard of different performance index test of adapted, inject various test bars, not only can select suitable Shooting Technique for the performance requirement of different test bars, ensure the quality of injection moulding test bars; And can also quick die change be reached, improve the object of die change efficiency, when different test bars will be made, only master core need be pulled down, change corresponding core rod.Because core rod is without described mould guiding parts and ejecting mechanism main member, only with profiled part and cast passage and allow the structure such as push-rod hole of ejecting mechanism push rod effect, therefore, its volume is little and lightweight, replacing core rod will change whole dynamic model more than prior art and cover half is easily much convenient, not only greatly reduce the physical fitness requirement to operator, and the requirement that can also reduce operator's skilled operation degree, mould replacing time is shortened greatly, the mould replacing time of prior art 1 hours is foreshortened within 1 minute, in addition, greatly can also save the die cost making various test bars.
As one embodiment of the present invention, described mould guiding parts is matching used lead and fairlead, to be located at respectively on described dynamic model frame and cover half frame and to be positioned at the periphery that described core rod installs chute, docking exactly smoothly to make dynamic model frame with cover half frame.
The present invention can do following improvement, strengthen because of the core rod setting of movable installation for avoiding the push rod stroke of ejecting mechanism, described ejecting mechanism is made up of the mould bases ejecting mechanism be arranged on dynamic model frame and the core rod ejecting mechanism be arranged on moving-mould-core, described push rod is divided into two sections, one section is arranged in mould bases ejecting mechanism, be called thimble, another section is arranged in core rod, is called fore-set.Mould bases ejecting mechanism is the main body of ejecting mechanism, the core rod be arranged on described dynamic model frame is installed in the installation cavity between the base plate of chute and dynamic mould framing plate, be made up of push pedal, thimble fixed head, thimble, back-moving spring and guide pillar, push pedal is located at dynamic mould framing plate inner face, thimble panel is for being fixed on push pedal by thimble, and back-moving spring is located, between the base plate that back-moving spring is clipped in core rod installation chute and thimble panel, for making it reset after thimble advances; Described guide pillar has 2 at least, divide the rear ends being located at push pedal, one end of guide pillar is fixed on dynamic mould framing plate, and the other end is then fixed on core rod and installs on the base plate of chute, at least be set in push pedal in the middle part of guide pillar, so that push pedal is along the guiding of described guide pillar alternating translational; On chute then installed by described thimble base plate by being positioned at described core rod, the mould bases that arranges ejects endoporus and penetrates core rod and install chute and be applied on the fore-set of core rod ejecting mechanism and carry out the demoulding; During work, the exit orifice that ejects that the push rod of injection machine passes on bottom mould bases contacts in the push pedal of described mould bases ejecting mechanism, promote Ejector Retainer Plate and the spatial translation of thimble panel between thimble panel and described installation chute base plate, make thimble pass through described in eject endoporus and act on core rod ejecting mechanism, promote moulding by core rod ejecting mechanism to be again separated with injection moulding die cavity, thus realize the moulding demoulding.
As one embodiment of the present invention, described core rod ejecting mechanism is positioned at the push-rod hole of moving-mould-core, be made up of fore-set, limiting component and reset components, described core rod push-rod hole is relative with the described cast passage on core rod, described limiting component is by spacing for fore-set in described centre hole, and reset components then makes fore-set complete to eject homing after action.
As a modification of the present invention, described core rod is installed before and after chute through, rotary stopper part is provided with on described plug-in mounting mouth limit, the rear port installing chute at described core rod is provided with limited block, the described limited block described core rod laid respectively on dynamic model frame and cover half frame is installed in the groove bottom of chute, to install in chute for the core rod of insertion being limited in described core rod and locating, and described rotary stopper part is hinged on the front end face of dynamic model frame and cover half frame respectively, when core rod moving-mould-core and cover half core being inserted respectively dynamic model frame and cover half frame is installed after in chute, rotate rotary stopper part spacing on mould bases by core rod to die core front end face.During dismounting core rod, turn on rotary stopper part, the core rod that core rod can be shifted out mould bases installs chute.Both contributed to quick die change, guaranteed again that core rod Fast Installation put in place and reliably working.
On the basis realizing above quick die change, the present invention can also do following improvement further: be arranged on by die cavity on single core rod, namely on the land area being only arranged on moving-mould-core or be only arranged on the land area of cover half core, the land area of another core rod is without die cavity, for plane, this core rod is applicable to the injection moulding of the moulding of standard testing batten or analogous shape, contributes to simplifying mould structure, improve the manufacturability of mould, reduce die cost.
On the basis of above-mentioned core rod mold cavity configuration, following improvement can also be done further: when described single core rod has die cavity, described die cavity profile is greater than moulding, it only has the partial contour line of moulding, be greater than the mold cavity space of moulding for holding a movable insert, this movable insert is used for being formed the profile of moulding another part, described movable insert is fixed on the land area that land area is that core rod of plane, and protrude from described land area, the height protruded and described die cavity height adapt, it has with moulding not by part outline line that die cavity limits, when moving-mould-core and cover half core matched moulds, described movable insert stretches in described die cavity, form moulding not by the profile of die cavity contour limit.The advantage that this employing movable insert is combined the injection moulding chamber forming complete moulding profile structure with die cavity has is, both the manufacturability of mould had been improved, contribute to again the demoulding of moulding, improve the harmful effect that force demoulding causes moulding performance, although because dynamic, the land area of cover half core is positioned at the end face of moulding, but still the contact surface of moulding and injection moulding chamber can be made to be dispersed on moving-mould-core and cover half core, while die sinking, the partial contour of moulding is just that the core rod of plane departs from land area, make ejecting mechanism only need apply less thrust and can make the moulding demoulding.
The following embodiment that the present invention recommends: the cast passage on described cover half core is the plug hole as sprue, the injection moulding jack of described plug hole and described cover half frame connects, moving-mould-core arranges die cavity, the land area of cover half core is plane, the land area of described cover half core arranges movable insert, described movable insert is identical with the cavity quantity that moving-mould-core is arranged, die cavity as moving-mould-core is arranged is two, movable insert then on cover half core is also two pieces, described movable insert is the distribution in front and back centered by described plug hole, two die cavitys on described moving-mould-core are corresponding with described movable insert, when cover half core and moving-mould-core matched moulds, movable insert is arranged in the die cavity on described moving-mould-core, 2 ~ 4 injection moulding chambers for the single moulding of injection moulding can be formed, each injection moulding chamber is communicated with described sprue by cast gate by runner.
The another kind of embodiment that the present invention recommends is as follows, stagger about the movable insert of described two die cavitys and correspondence thereof, described core rod ejecting mechanism is positioned at the middle part of described moving-mould-core, during die sinking, movable insert withdraws from die cavity along with moving of dynamic model, the cylindricality feed back that moulding is formed with sprue for fulcrum towards movable insert the direction of position of leaving a blank rotate and occur loosening, more contribute to the light demoulding of moulding.
In order to improve die change efficiency further; guarantee accuracy and the security of die change; the land area of cover half core of the present invention and moving-mould-core is respectively equipped with the keeper cooperatively interacted; described keeper at least adopts a pair and the keeper of mutual centering adaptation; described keeper lays respectively at the periphery of the die cavity of described cover half core and moving-mould-core; being in the position difference of the land area of core rod with described keeper and distinguishing different core rod, is namely only that the cover half core of same set of core rod is corresponding with often pair of keeper on moving-mould-core.Described keeper can specifically adopt locating dowel and locating hole.On different core rod, the position of keeper is different, and when matched moulds, the fixed half and moving half only had corresponding to same position keeper belongs to same set of core rod, and the fixed half and moving half belonging to same set of core rod could realize matched moulds; And it is different not belong to locating piece position on the fixed half and moving half of same set of core rod, keeper is not corresponding, and the fixed half and moving half therefore not belonging to same set of core rod cannot matched moulds, so, ensure that accuracy and the security of die change, further increases die change efficiency.
When die sinking, in order to avoid cylindricality feed back is bonded in the not easily demoulding in the sprue of moving-mould-core, as a modification of the present invention, the end face of the fore-set in described core rod ejecting mechanism is inclined-plane, a triangle angle is had below described inclined-plane, the incline direction of described angle is identical with the incline direction on described inclined-plane, between the hole wall of described inclined-plane and core rod push-rod hole, there is space, described angle forms with the hole wall of core rod push-rod hole the space communicated with described space, this space is as the chamber of injection moulding cylindricality feed back lower end, making the described angle when die sinking catch on cylindricality feed back lower end is bonded in sprue to avoid it, and along inclined-plane after ejecting moulding, angle takes off moulding and realizes the demoulding.The present invention along inclined-plane, angle takes off moulding, when taking, moulding is stressed little, does not substantially have an impact to the performance of moulding.
For the ease of core rod being put into mould bases or taking out from mould bases, be respectively equipped with handle and handrail in the front-end and back-end of described core rod, handle is separately positioned on the front end of cover half core and moving-mould-core, and handrail then lays respectively on the rear end of cover half core and moving-mould-core.So that workman loads and unloads core rod fast steadily.
Compared with prior art, the present invention has following significant effect:
(1) the present invention only need make a set of mould bases, just can the core rod of different die cavitys that makes according to the batten standard of different performance index test of adapted, inject various test bars, not only can select suitable Shooting Technique for the performance requirement of different test bars, ensure the quality of injection moulding test bars; And can also quick die change be reached, improve the object of die change efficiency, when different test bars will be made, only master core need be pulled down, change corresponding core rod.Volume due to core rod is little and lightweight, die change is easily convenient more than prior art, not only greatly reduce the physical fitness requirement to operator, and the requirement that can also reduce operator's skilled operation degree, mould replacing time is shortened greatly, the mould replacing time of prior art 1 hours is foreshortened within 1 minute, in addition, greatly can also save the die cost making various test bars.
(2) limited block of the present invention and rotary stopper part are installed spacing for core rod in chute at core rod jointly, prevent core rod from deviating from, both contribute to quick die change, guarantee that again core rod is in place and reliably working.
(3) running channel of the present invention is shorter, and the raw material remained on running channel is few, saves raw material, reduces cost, reduce the reduction of raw material simultaneously, considerable influence can not be produced to the density of moulding, and, during pressurize, pressure consume is little, and pressurize is easy, ensure that the quality of moulding; By changing core rod, difform movable insert and die cavity coordinate and form different injection moulding die cavitys, the Shooting Technique requirement of various batten can be met, produce the standard batten needing to carry out whole test index, can realize needing to test the making at the batten of the mutually not equal multiple situation of different times test event of a variety of performance indications and different materials to the various battens of same material.
(4) die cavity is arranged on the scheme on single core rod by the present invention, is applicable to the injection molding of the moulding of standard testing batten or analogous shape, contributes to simplifying mould structure, improves the manufacturability of mould, reduces die cost.
(5) the present invention is on the basis of (4) putting, be staggeredly arranged about the movable insert of the die cavity of two on core rod and correspondence thereof, during die sinking, along with movable insert withdraws from die cavity, moulding is because the open meeting of partial contour is around cylindricality feed back center and pour point turn certain angle a little, the demoulding is realized for ejecting a little to be ejected by moulding again with pour point, the rotation of moulding is translational motion, its institute is stressed is horizontal direction active force, moulding uniform force, and be that summit ejects with pour point by moulding, moulding stressed little, the demoulding is easy, and moulding not easily deforms, therefore mold materials of the present invention is applied widely, and test data is accurate, knockout course due to test bars can not produce the impact in performance on batten, therefore further improve the quality of batten, make the performance indications of the performance of batten and material basically identical, ensure that the quality of the product used made by this material.
(6) on different core rods, the position of keeper is different, and when matched moulds, the cover half core and the moving-mould-core that only belong to same set of core rod could realize matched moulds; And the cover half core not belonging to same set of core rod is different with the locating piece position on moving-mould-core, therefore cannot matched moulds, so, ensure that accuracy and the security of die change, further increase die change efficiency.
(7) fore-set has angle, make this angle when die sinking catch on cylindricality feed back lower end and after ejecting moulding along inclined-plane, angle takes off moulding, when die sinking, cylindricality feed back can be avoided to be bonded in sprue, and along inclined-plane, angle takes off moulding, when taking, moulding is stressed little, does not substantially have an impact to the performance of moulding.
(8) core rod of the present invention can increase core rod according to the demand of standard batten, fast and easy in real time, and efficiency is higher, and can not waste, and reduces cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the front view of the mould bases of the embodiment of the present invention 1;
Fig. 2 is the left view of cover half frame in Fig. 1;
Fig. 3 is the right view of dynamic model frame in Fig. 1;
Fig. 4 is the A-A line sectional view along Fig. 1;
Fig. 5 is the sectional view along the B-B line of Fig. 3 after moving mold and cover half frame combine;
Fig. 6 is that in embodiment 1, core rod is arranged on the front view in mould bases;
Fig. 7 is the land area view that embodiment 1 makes the cover half core of extension test batten;
Fig. 8 is the land area view of embodiment 1 moving-mould-core;
Fig. 9 is moulding---the extension test batten front view that embodiment 1 makes;
Figure 10 is the sectional view along C-C line in Fig. 8 after moving-mould-core in embodiment 1 and the combination of cover half core;
Figure 11 is D enlarged diagram in Figure 10;
Figure 12 is the sectional view along E-E line in Fig. 8 after moving-mould-core in embodiment 1 and the combination of cover half core;
Figure 13 is the land area view that the embodiment of the present invention 2 makes the cover half core of impact bending test bars;
Figure 14 is the land area view of embodiment 2 moving-mould-core;
Figure 15 is the front view of the moulding that embodiment 2 makes;
Figure 16 is the sectional view along F-F line in Figure 14 after moving-mould-core in embodiment 2 and the combination of cover half core;
Figure 17 is the sectional view along G-G line in Figure 14 after moving-mould-core in embodiment 2 and the combination of cover half core;
Figure 18 is the schematic diagram (cover half core only draws the movable insert on it) when movable insert is positioned at die cavity after cover half core and moving-mould-core combination in embodiment 2;
Figure 19 is the schematic diagram of fore-set in core rod ejecting mechanism;
Figure 20 is mould schematic diagram of the prior art.
Detailed description of the invention
Embodiment 1
As Fig. 1 ~ 12, shown in 19, it is the injection mold of a kind of fast changeable core rod of the present invention, in the present embodiment, make testing standard batten, see Fig. 9, injection mold is made up of dynamic model and cover half, wherein, dynamic model and cover half include profiled part, ejecting mechanism, mould guiding parts and running gate system, dynamic model main body is made up of dynamic model frame 22 and the moving-mould-core 12 be movably arranged on dynamic model frame 22, cover half main body is then made up of cover half frame 21 and the cover half core 11 be movably arranged on cover half frame 21, dynamic model frame 22 and cover half frame 21 are referred to as mould bases, moving-mould-core 12 and cover half core 11 are referred to as core rod, core rod is the mobilizable profiled part be separated with mould bases, core rod is cube shaped blocks, injection moulding die cavity is located in core rod, by the die cavity be at least arranged on moving-mould-core or cover half core land area dynamic, complete injection moulding die cavity is formed after cover half core matched moulds,
In the present embodiment, die cavity is positioned on moving-mould-core 12, moving-mould-core and cover half core make the land area of two core rods engage respectively by dynamic model frame 22 docks mutually with cover half frame 21 and realize matched moulds, cover half frame 21 has the injection moulding jack 211 for grafting injection machine injection nozzle, and this injection moulding jack 211 is communicated with the injection moulding die cavity on core rod by passage; Dynamic model frame 22 interface with cover half frame 21 has core rod that an anterior-posterior horizontal extends respectively chute 80,90 is installed, core rod installation chute has the plug-in mounting mouth for loading and unloading core rod in its front end, core rod is provided with the track installing chute adaptation with core rod and moves to make core rod install chute along core rod, and insert by plug-in mounting mouth or split out from the core rod installation chute mould bases, thus realize the replacing of core rod.
Track on core rod and core rod are installed and coordinating of chute are adopted strip slide block 111 and chute 86, and wherein, slide block 111 is positioned on four sides of core rod, and chute 86 is positioned at core rod and installs on four sides of chute, and slide block 111 is arranged in chute.
Core rod is installed before and after chute through, rotary stopper part 3 is provided with on plug-in mounting mouth limit, the rear port installing chute at core rod is provided with limited block 4, limited block 4 core rod laid respectively on dynamic model frame and cover half frame is installed in the groove bottom of chute, to install in chute for the core rod of insertion being limited in core rod and locating, and rotary stopper part 4 is hinged on dynamic model frame 22 respectively with on the front end face of cover half frame 21, when core rod moving-mould-core 12 and cover half core 11 being inserted respectively dynamic model frame 22 and cover half frame 21 installs chute 80, after in 90, rotate rotary stopper part 4 to die core front end face spacing on mould bases by core rod, during dismounting core rod, turn on rotary stopper part, the core rod that core rod can be shifted out mould bases installs chute.
Mould guiding parts is matching used four pairs of leads 31 and fairlead 32, lead 31 is located on dynamic model frame 22, and fairlead 32 is located on cover half frame 21, be positioned at the periphery that dynamic model frame 22 and the core rod of cover half frame 21 install chute, realize successfully docking of dynamic model frame and cover half frame.Wherein, lead 31 is arranged on dynamic mould fixing plate 221, and fairlead 32 is positioned on cover half fixed head 214, and lead 31 is set in fairlead 32 and realizes cover half frame and fix with docking of dynamic model frame.
Ejecting mechanism is made up of the mould bases ejecting mechanism 5 be arranged on dynamic model frame 22 and the core rod ejecting mechanism 6 be arranged on moving-mould-core, push rod to be divided into two sections, one section is arranged in mould bases ejecting mechanism, is called thimble 229, another section is arranged in core rod, is called fore-set 62.Mould bases ejecting mechanism 5 is the main body of ejecting mechanism, the core rod be arranged on dynamic model frame 22 is installed in the installation cavity between the base plate of chute and dynamic mould framing plate, wherein, dynamic mould framing plate is made up of square iron 223 and base plate 224, square iron 223 points is located at the both sides of base plate 224, and the base plate that core rod installs chute is made up of dynamic mould fixing plate 221 and chute base plate 222, the both sides that dynamic mould fixing plate 221 points is located at chute base plate 222 form installation chute 80, mould bases ejecting mechanism 5 is by push pedal 511, thimble panel 522, thimble 229, back-moving spring 227 and guide pillar 228 form, push pedal 511 is located at dynamic mould framing plate inner face, thimble panel 522 is for being fixed on push pedal 511 by thimble 229, and back-moving spring 227 is located, between the base plate that back-moving spring 227 is clipped in core rod installation chute and thimble panel 522, for making it reset after thimble 229 advances, guide pillar 228 has 4, divide the rear ends being located at push pedal 511 in pairs, one end of guide pillar 228 is fixed on dynamic mould framing plate, and the other end is then fixed on core rod and installs on the base plate of chute, be set in the middle part of guide pillar 228 in push pedal 511, so that push pedal 511 is along the guiding of guide pillar 228 alternating translational, on chute installed by 229, thimble base plate by being positioned at core rod, the mould bases that arranges ejects endoporus and penetrates core rod and install chute and be applied on the fore-set of core rod ejecting mechanism and carry out the demoulding.During work, the exit orifice that ejects that the push rod of injection machine passes on bottom mould bases contacts in the push pedal of mould bases ejecting mechanism, promote push pedal and the spatial translation of thimble panel between thimble panel and installation chute base plate, making thimble pass through to eject endoporus acts on core rod ejecting mechanism, promote moulding by core rod ejecting mechanism to be again separated with injection moulding die cavity, thus realize the moulding demoulding.
In the present embodiment, be set in push pedal 511 in the middle part of guide pillar 228, specifically in push pedal and thimble panel, be provided with installation through hole, middle care set 230 is fixed on installs in through hole, one end of guide pillar 228 is fixed on base plate 224, and the other end is fixed on chute base plate 222 after being upward through middle care set 230, and the plate face of push pedal is positioned at mould bases and ejects exit orifice 225 front end, be forced through middle care set by the push rod of injection machine to move along guide pillar, and thimble is upwards released.The outer wall of middle care set 230 is provided with annular flange flange 7 along its circumference, install through hole hole wall circumferentially correspondence be provided with annular slot, through hole is installed be made up of the straight hole be positioned on thimble panel and the stepped hole be positioned in push pedal, stepped hole is made up of two sections of up big and down small concentric different diameter holes, the aperture of upper sector hole is greater than the aperture of straight hole and forms annular slot, and annular flange flange is arranged in annular slot.
Cover half frame 21 comprises locating ring 212, cover half panel 213 and cover half fixed head 214 for being positioned on injection machine, locating ring 212 is positioned at the centre of cover half panel 213, injection moulding jack 211 to be located on cover half panel 213 and to be positioned at locating ring 212, and cover half fixed head 214 points is located at the both sides of cover half panel 213 and forms cover half and install chute 90.
Die cavity is arranged on single core rod, namely on the land area being only arranged on moving-mould-core or be only arranged on the land area of cover half core, the land area of another core rod is without die cavity, for plane, when single core rod has die cavity, die cavity profile is greater than moulding, it only has the partial contour line of moulding, be greater than the mold cavity space of moulding for holding a movable insert, this movable insert is used for being formed the profile of moulding another part, movable insert is fixed on the land area that land area is that core rod of plane, and protrude from land area, the height protruded and die cavity height adapt, it has with moulding not by part outline line that die cavity limits, when moving-mould-core and cover half core matched moulds, movable insert stretches in die cavity, form moulding not by the profile of die cavity contour limit.
As shown in Fig. 7 ~ 12, cast passage on cover half core 11 is the plug hole as sprue, the injection moulding jack 211 of plug hole and cover half frame 21 connects, moving-mould-core 12 arranges die cavity, the land area of cover half core 11 is plane, the land area of cover half core 11 arranges movable insert, movable insert is identical with the cavity quantity that moving-mould-core 12 is arranged, in the present embodiment, the die cavity 122 that moving-mould-core 12 is arranged is two, movable insert 112 then on cover half core 11 is also two pieces, movable insert 112 is the distribution in front and back centered by plug hole, stagger about the movable insert of two die cavitys and correspondence thereof, two die cavitys 122 on moving-mould-core 12 are corresponding with movable insert 112, when cover half core 11 and moving-mould-core 12 matched moulds, movable insert 112 is arranged in the die cavity 122 on moving-mould-core 12, 2 injection moulding chambers for the single moulding of injection moulding can be formed, in the present embodiment, moulding is extension test batten 100, see Fig. 9, each injection moulding chamber is communicated with sprue by cast gate by runner 123.Core rod ejecting mechanism is positioned at the middle part of moving-mould-core, during die sinking, piece moulding inlaying withdraws from die cavity along with moving of dynamic model, the cylindricality feed back that moulding is formed with sprue for fulcrum towards piece moulding inlaying the direction of position of leaving a blank rotate and occur loosening, more contribute to the light demoulding of moulding.
In order to core rod is easy to make, die cavity 122 forms with groove primarily of fixing mold insert 124, fixing mold insert 124 is arranged along the side cell wall of groove, and two fixing mold inserts 124 are along the lateral alternate of moving-mould-core 12, cover half core 11 and moving-mould-core 12 matched moulds make movable insert 112 be positioned at die cavity 122 and abut against on the opposite side cell wall of groove to form injection moulding die cavity, see Fig. 8.Cover half core 11 is fixing by upper cover half central layer 113 and lower cover half central layer about 114 respectively and form, moving-mould-core 12 is fixing by upper dynamic model central layer 51 and lower dynamic model central layer about 52 respectively and form, movable insert is positioned on lower cover half central layer 114, and die cavity is positioned on dynamic model central layer 51; Sprue bush 53 for accepting injection machine injection nozzle is installed in plug hole, sprue is the inner duct 54 of sprue bush, the inner duct 54 of sprue bush 53 is made up of the lower sector hole of sector hole in the infundibulate on top and flaring, the outer wall of sprue bush 53 has annular flange flange 55, the position that the hole wall of plug hole corresponds to annular flange flange 55 is provided with annular bayonet socket, and annular flange flange is positioned at annular bayonet socket with fixing sprue bush.
Cover half core 11 and the land area of moving-mould-core 12 are respectively equipped with the keeper cooperatively interacted, keeper at least adopts a pair and the keeper of mutual centering adaptation, keeper lays respectively at the periphery of the die cavity of cover half core and moving-mould-core, being in the position difference of the land area of core rod with keeper and distinguishing different core rod, is namely only that the cover half core of same set of core rod is corresponding with often pair of keeper on moving-mould-core.In the present embodiment, keeper adopts four pairs of locating dowels and locating hole, wherein, locating hole 43 is positioned on the corner of cover half core land area, locating dowel 42 is positioned on the corner of moving-mould-core land area, locating dowel is corresponding with the setting position of locating hole, and during matched moulds, locating dowel 42 is arranged in the effect that locating hole 43 plays guiding and accurately locates.
As shown in Figure 10,11 and 19, core rod ejecting mechanism 6 is positioned at the push-rod hole of moving-mould-core, is made up of fore-set 62, limiting component and reset components, and limiting component is by spacing for fore-set in centre hole, and reset components then makes fore-set complete to eject homing after action.Reset components adopts spring 63, limiting component adopts spacer 64 and ejector sleeve 61, core rod push-rod hole is relative with the cast passage on core rod, core rod push-rod hole is communicated with the runner of moving-mould-core land area, core rod push-rod hole core rod push-rod hole core rod push-rod hole core rod push-rod hole core rod push-rod hole core rod push-rod hole is large and upper primarily of stage casing, three sections that hypomere is little concentric different diameter hole compositions, fore-set 62 is "T"-shaped, ejector sleeve 61 is lid, ejector sleeve 61 is arranged in the bottom of sector hole, fore-set 62 extends upwardly in sector hole through spacer 64 and spring 63, the head 621 of fore-set 62 is then fixed in ejector sleeve 61 by spacer 64, the upper end of spring 63 contacts on the top of middle sector hole, lower end contacts on spacer 64, thimble on dynamic model frame 22 by lower sector hole upwardly ejector sleeve, make fore-set contact on cylindricality feed back by moulding upwards jack-up realize the demoulding or cancel thrust fore-set is resetted under the effect of spring-return power.Protrude the boss forming hollow in the middle part of the bottom surface of ejector sleeve 61 in downward sector hole, the head of fore-set 62 is positioned at this boss, and spacer 64 is on reducing step surface, and the table top of boss is concordant with the lower peritreme of lower sector hole; There is ring-shaped step spacing with what make ejector sleeve move up to contact to realize on ring-shaped step to ejector sleeve on the top of middle sector hole.
The end face of the fore-set 62 in core rod ejecting mechanism is inclined-plane 400, a triangle angle 622 is had below inclined-plane, the incline direction of angle 622 is identical with the incline direction on inclined-plane 400, between the hole wall of inclined-plane 400 and core rod push-rod hole, there is space, angle 622 forms with the hole wall of core rod push-rod hole the space communicated with space, this space is as the chamber of injection moulding cylindricality feed back lower end, make the angle when die sinking catch on cylindricality feed back lower end to be bonded in sprue to avoid it, and after ejecting moulding along inclined-plane, angle takes off moulding and realizes the demoulding.See Figure 19.
Be respectively equipped with handle 62 and handrail 60 in the front-end and back-end of core rod, handle 62 is separately positioned on the front end of cover half core 11 and moving-mould-core 12, and 60, handrail lays respectively on the rear end of cover half core 11 and moving-mould-core 12, so that workman loads and unloads core rod fast steadily.
The course of work of the present invention is:
(1) change core rod: when the tensile bars of embodiment 1 makes complete, when needing the standard testing batten making embodiment 2, realize by changing core rod, namely both hands pull handle to install coordinating between chute by the guide rail of core rod and the core rod of mould bases and extracted out from mould bases by the core rod of embodiment 1, and the core rod of embodiment 2 is inserted, core rod is easy to loading and unloading, and mould replacing time shortens greatly; Because the keeper setting position on different core rod is different, when therefore inserting cover half core and the moving-mould-core of embodiment 2 in mould bases, if after there occurs the cover half core inserting embodiment 2, insert again the situation of the moving-mould-core of embodiment 1, because the keeper setting position on two cover core rods is different, make the moving-mould-core of embodiment 1 cannot insert the cover half core matched moulds with embodiment 2, ensure that the safety of matched moulds.
(2) production standard test bars: cover half core and moving-mould-core matched moulds, land area is formed injection moulding die cavity, the injection nozzle of injection machine inserts in sprue bush, fused solution flows into injection moulding die cavity in from sprue by runner, cast gate by sprue bush, after naturally cooling, in injection moulding die cavity, form two battens for testing, be the cylindricality feed back be molded in sprue and the plates be molded in runner and cast gate between two battens.
(3) die sinking and the demoulding: open cover half core and moving-mould-core, the angle of fore-set catches on the lower end of cylindricality feed back, cylindricality feed back can not be bonded in sprue bush, simultaneously, along with movable insert withdraws from die cavity, standard testing batten can around cylindricality feed back and pour point turn certain angle a little, produce and loosen, the push rod of injection machine ejects exit orifice by the mould bases of dynamic model frame and contacts in push pedal, thimble panel and push pedal is made to drive thimble to move up, thimble promotes ejector sleeve, push rod then contacts cylindricality feed back, now, injection moulding batten is taken off along the inclined-plane of fore-set and angle, this kind of stripping means, batten is stressed little, its performance is not had an impact substantially.
(4), for forming fracture between the batten tested and middle part plates, fracture to take out test bars along fracture.
Embodiment 2
As shown in figure 13 to 18, the present embodiment is from the difference part of embodiment 1: the injection moulding die cavity on core rod is different, see Figure 15, the moulding that the present embodiment core rod is suitable for is cantilever beam 91, bending standard testing batten 92, normal of impact test bars 93, the land area of cover half core 11 is provided with 2 movable inserts 70, 71, movable insert is the distribution in front and back centered by plug hole (i.e. the inner duct 54 of sprue bush), the land area of moving-mould-core 12 is provided with 2 die cavitys 73, two die cavitys on moving-mould-core and movable insert 70, 71 is corresponding, during matched moulds, movable insert is arranged in the die cavity of moving-mould-core and forms the injection moulding chamber of 4 single mouldings of injection moulding, i.e. movable insert 70, 71 lay respectively on the medium position of the die cavity of moving-mould-core, the shape of 4 injection moulding chambers adapts with moulding shape to be produced respectively, formed for making two cantilever beams, bending, the injection moulding chamber of normal of impact test bars, each injection moulding chamber is communicated with sprue by cast gate by two runners 72.
The corner of the upper dynamic model central layer of moving-mould-core is provided with locating dowel 42, the corner of the lower dynamic model central layer of cover half core is provided with locating hole 43, locating dowel is corresponding with the setting position of locating hole, this locating dowel 42 is slightly different with the setting position of the setting position of locating hole 43 on core rod and the locating dowel on embodiment 1 core rod and locating hole, and the fixed half and moving half belonging to same set of core rod could realize matched moulds.
Embodiments of the present invention are not limited thereto; according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite; the present invention also has the amendment of various ways, replacement or change, all drops within rights protection scope of the present invention.

Claims (11)

1. the injection mold of a fast changeable core rod, be made up of dynamic model and cover half, wherein, described dynamic model and cover half include profiled part, ejecting mechanism, mould guiding parts and running gate system, it is characterized in that: dynamic model main body is made up of dynamic model frame and the moving-mould-core be movably arranged on dynamic model frame, cover half main body is then made up of cover half frame and the cover half core be movably arranged on cover half frame, dynamic model frame and cover half frame are referred to as mould bases, moving-mould-core and cover half core are referred to as core rod, described core rod is cube shaped blocks, injection moulding die cavity is located in described core rod, by the die cavity be at least arranged on described moving-mould-core or cover half core land area dynamic, complete injection moulding die cavity is formed after cover half core matched moulds, described moving-mould-core and cover half core make the land area of two core rods engage respectively by dynamic model frame docks mutually with cover half frame and realize matched moulds, described cover half frame has the injection moulding jack for grafting injection machine injection nozzle, and this injection moulding jack is communicated with the injection moulding die cavity on core rod by passage, the interface of described dynamic model frame and cover half frame has core rod that an anterior-posterior horizontal extends respectively chute is installed, described core rod installation chute at least has the plug-in mounting mouth for loading and unloading described core rod in its front end, described core rod is provided with the track installing chute adaptation with described core rod and moves to make core rod install chute along core rod, and insert by described plug-in mounting mouth or split out from the core rod installation chute described mould bases, thus realize the replacing of core rod, described ejecting mechanism is made up of the mould bases ejecting mechanism be arranged on dynamic model frame and the core rod ejecting mechanism be arranged on moving-mould-core, push rod to be divided into two sections, one section is arranged in mould bases ejecting mechanism, be called thimble, another section is arranged in core rod, be called fore-set, mould bases ejecting mechanism is the main body of ejecting mechanism, the core rod be arranged on described dynamic model frame is installed in the installation cavity between the base plate of chute and dynamic mould framing plate, by push pedal, thimble panel, thimble, back-moving spring and guide pillar composition, push pedal is located at dynamic mould framing plate inner face, thimble panel is for being fixed on push pedal by thimble, and back-moving spring is located, between the base plate that back-moving spring is clipped in core rod installation chute and thimble panel, for making it reset after thimble advances, described guide pillar has 2 at least, divide the rear ends being located at push pedal, one end of guide pillar is fixed on dynamic mould framing plate, and the other end is then fixed on core rod and installs on the base plate of chute, at least be set in push pedal in the middle part of guide pillar, so that push pedal is along the guiding of described guide pillar alternating translational, on chute then installed by described thimble base plate by being positioned at described core rod, the mould bases that arranges ejects endoporus and penetrates core rod and install chute and be applied on the fore-set of core rod ejecting mechanism and carry out the demoulding.
2. the injection mold of fast changeable core rod according to claim 1, it is characterized in that: described mould guiding parts is matching used lead and fairlead, to be located at respectively on described dynamic model frame and cover half frame and to be positioned at the periphery that described core rod installs chute, docking exactly smoothly with cover half frame to make dynamic model frame.
3. the injection mold of fast changeable core rod according to claim 2, it is characterized in that: described core rod ejecting mechanism is positioned at the push-rod hole of moving-mould-core, be made up of fore-set, limiting component and reset components, described core rod push-rod hole is relative with the cast passage on core rod, described limiting component is by spacing for fore-set in centre hole, and reset components then makes fore-set complete to eject homing after action.
4. the injection mold of fast changeable core rod according to claim 3, it is characterized in that: described core rod is installed before and after chute through, rotary stopper part is provided with on described plug-in mounting mouth limit, the rear port installing chute at described core rod is provided with limited block, the described limited block described core rod laid respectively on dynamic model frame and cover half frame is installed in the groove bottom of chute, to install in chute for the core rod of insertion being limited in described core rod and locating, and described rotary stopper part is hinged on the front end face of dynamic model frame and cover half frame respectively, when core rod moving-mould-core and cover half core being inserted respectively dynamic model frame and cover half frame is installed after in chute, rotate rotary stopper part spacing on mould bases by core rod to die core front end face.
5. the injection mold of fast changeable core rod according to claim 4, it is characterized in that: described die cavity is arranged on single core rod, namely on the land area being only arranged on moving-mould-core or be only arranged on the land area of cover half core, the land area of another core rod, without die cavity, is plane.
6. the injection mold of fast changeable core rod according to claim 5, it is characterized in that: when described single core rod has die cavity, described die cavity profile is greater than moulding, described die cavity profile only has the partial contour line of moulding, be greater than the mold cavity space of moulding for holding a movable insert, this movable insert is used for being formed the profile of moulding another part, described movable insert is fixed on the land area that land area is that core rod of plane, and protrude from described land area, the height protruded and described die cavity height adapt, described movable insert has with moulding not by part outline line that die cavity limits, when moving-mould-core and cover half core matched moulds, described movable insert stretches in described die cavity, form moulding not by the profile of die cavity contour limit.
7. the injection mold of fast changeable core rod according to claim 6, it is characterized in that: the cast passage on described cover half core is the plug hole as sprue, the injection moulding jack of described plug hole and described cover half frame connects, moving-mould-core arranges die cavity, the land area of cover half core is plane, the land area of described cover half core arranges movable insert, described movable insert is identical with the cavity quantity that moving-mould-core is arranged, the die cavity that moving-mould-core is arranged is two, movable insert then on cover half core is also two pieces, described movable insert is the distribution in front and back centered by described plug hole, two die cavitys on described moving-mould-core are corresponding with described movable insert, when cover half core and moving-mould-core matched moulds, movable insert is arranged in the die cavity on described moving-mould-core, 2 ~ 4 injection moulding chambers for the single moulding of injection moulding can be formed, each injection moulding chamber is communicated with described sprue by cast gate by runner.
8. the injection mold of fast changeable core rod according to claim 7, it is characterized in that: stagger about the movable insert of described two die cavitys and correspondence thereof, described core rod ejecting mechanism is positioned at the middle part of described moving-mould-core, during die sinking, movable insert withdraws from die cavity along with moving of dynamic model, the cylindricality feed back that moulding is formed with sprue for fulcrum towards movable insert the direction of position of leaving a blank rotate and occur loosening, so that the moulding demoulding.
9. the injection mold of fast changeable core rod according to claim 8, it is characterized in that: the land area of described cover half core and moving-mould-core is respectively equipped with the keeper cooperatively interacted, described keeper at least adopts a pair and the keeper of mutual centering adaptation, described keeper lays respectively at the periphery of the die cavity of described cover half core and moving-mould-core, being in the position difference of the land area of core rod with described keeper and distinguishing different core rod, is namely only that the cover half core of same set of core rod is corresponding with often pair of keeper on moving-mould-core.
10. the injection mold of fast changeable core rod according to claim 9, it is characterized in that: the end face of the fore-set in described core rod ejecting mechanism is inclined-plane, a triangle angle is had below described inclined-plane, the incline direction of described angle is identical with the incline direction on described inclined-plane, between the hole wall of described inclined-plane and core rod push-rod hole, there is space, described angle forms with the hole wall of core rod push-rod hole the space communicated with described space, this space is as the chamber of injection moulding cylindricality feed back lower end, making the described angle when die sinking catch on cylindricality feed back lower end is bonded in sprue to avoid it, and along inclined-plane after ejecting moulding, angle takes off moulding and realizes the demoulding.
The injection mold of 11. fast changeable core rods according to claim 10, it is characterized in that: be respectively equipped with handle and handrail in the front-end and back-end of described core rod, handle is separately positioned on the front end of cover half core and moving-mould-core, and handrail then lays respectively on the rear end of cover half core and moving-mould-core.
CN201310146657.4A 2012-11-09 2013-04-24 Injection mould with rapidly-replaced mould cores Active CN103231494B (en)

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