CN203267086U - Injection mould with rapidly-replaced mold core - Google Patents

Injection mould with rapidly-replaced mold core Download PDF

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Publication number
CN203267086U
CN203267086U CN 201320213428 CN201320213428U CN203267086U CN 203267086 U CN203267086 U CN 203267086U CN 201320213428 CN201320213428 CN 201320213428 CN 201320213428 U CN201320213428 U CN 201320213428U CN 203267086 U CN203267086 U CN 203267086U
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China
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core
mould
core rod
cover half
moving
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CN 201320213428
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Chinese (zh)
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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 utility model discloses an injection mould with a rapidly-replaced mold core. The injection mould is composed of a moving mould and a fixed mould, wherein a main body of the moving mould is composed of a moving mould base and a moving mould core movably arranged on the moving mould base; a main body of the fixed mould is composed of a fixed mould base and a fixed mould core movably arranged on the fixed mould base; the butt-joint surfaces of the moving mould base and the fixed mould base are respectively provided with a mould core mounting chute horizontally extending back and forth; at least the front ends of the mould core mounting chutes are provided with plug-in mounting holes for mounting and dismounting of the mould cores; the mould cores are provided with tracks adapted to the mould core mounting chutes so that the mould cores move along the mould core mounting chutes; and the mould cores are plugged in or dismounted from the mould core mounting chutes in the mould bases through the plug-in mounting holes, so that the mould cores are replaced. According to the injection mould disclosed by the utility model, only is one set of mould needed to be manufactured and can be matched with the mould cores with different cavities manufactured according to sample standards tested on the basis of different performance indexes, the mould replacing operation is easier and more convenient than that of the prior art, the mould replacing time is greatly shortened, the cost of moulds for manufacturing various testing samples can also be greatly reduced.

Description

A kind of injection mold of fast changeable core rod
Technical field
The utility model relates to a kind of mould, relates in particular to a kind of injection mold of fast changeable core rod, is applicable to injection moulding and makes plastics standard testing batten, plastic products, rubber etc.
Background technology
Synthetic material (comprising that plastics, rubber etc. are 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, also corresponding raising of requirement to synthetic material, for example in automotive field, some auto parts must possess high temperature resistant, high-intensity performance, and some parts as upholstery 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, can add a large amount of inorganic fillings in plastics, and the increase of inorganic fillings will inevitably exert an influence also to the performance of plastics.
Impact based on above various requirement and interpolation inorganic fillings, material must detect to check it whether to satisfy the performance requirement of product before making finished product, existing common way is material to be injection molded into the test bars of various various criterions, these test bars are divided with test performance project difference, whether test bars commonly used is various mechanical test battens (referring to Fig. 9 and Figure 15), flame retardant test batten, heatproof test bars etc., then the standard batten is carried out performance test can check it to meet the requirements.In addition, in China's manufacturing industry foreign trade cooperation, be generally to produce plastics standard testing batten 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 the performance of reflection material, just may cause test result defective, cause the order of trade cooperation to be difficult to implement and carry out, this will directly affect the economic benefit of enterprise, what is more, can cause potential threat 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 can directly affect the quality of product again, and the mould of the performance indications of batten and injection moulding batten is closely bound up.Traditional injection moulding standard batten mould is various battens commonly used to be concentrated in a mold and by an injection moulding make, and namely no matter needs any batten, is all formed by same mold injection, and therefore there is following defective in traditional mould:
⑴. the Shooting Technique of various battens all has difference, and existing mold all concentrates on various battens and makes in same mould, can't satisfy simultaneously the Shooting Technique requirement of various battens, be easy to make the test bars quality distortion, can not objective reality the performance of ground reflection material.For example tensile bars has certain requirement to the trend of molecule, thicker batten requires the long dwell time and makes the contraction of batten control to minimum, requiring during the thin batten of injection moulding comparison has very fast injection speed just can be full of die cavity, obviously, no matter adopt which kind of Shooting Technique, all can not satisfy simultaneously the Shooting Technique requirement of all battens.
⑵. the various battens of same material need to be tested a variety of performance indications, and different materials is not identical in the project of different times test yet, thus adopt same mould can not produce the standard batten that need to carry out whole test indexs,
therefore the another kind of mode of commonly using in the prior art is, carry out as required the batten of different performance index test and change corresponding mould, and existing mould generally is comprised of the dynamic model c and the cover half d that are arranged on respectively on Injection Motor Template a and solid plate b, wherein, also include the profiled part e that is mainly consisted of by punch and die 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 that is used for the demoulding on dynamic model, guarantee the constitutional details such as guiding parts h of dynamic model and the cover half accurate centering of energy when matched moulds etc., punch and die divide the land area place that is located at dynamic model c and cover half d (referring to Figure 20).When needs more during mold exchange, must with dynamic model and cover half is whole disassemble from injection machine, change another a whole set of mould, its weak point is:
⑴. mould is bulky and heavier, complicated with the assembling of injection machine, operating personnel's labour intensity is very large, making more, the whole process of mold exchange often needs to spend approximately 45 minutes to one hour, and, the concrete condition of injection machine and mould, operating personnel's physical efficiency, skilled operation degree all can exert an influence to changing efficient, and directly affect the production efficiency of batten.
⑵. existing mold is larger to the applicable limitation of material, be only applicable to the moderate material of soft durometer, when batten is taken out in the mould die sinking, usually adopt the mode that ejects, namely several positions of selected batten are as the application point that ejects, if the batten material hardness is higher, die cavity wall adhesion due to batten and mould, the phenomenon that demoulding difficulty can occur, if this moment 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 the batten material hardness is lower, batten can deform after the demoulding, is unfavorable for the test of batten performance indications.described batten distortion refers to that batten produces draw taper, the shape of cross section that namely refers to batten is that up big and down small inversion is trapezoidal, when calculating tensile strength (MPa), need to measure the area of cross section, the general vernier caliper measurement that adopts, yet slide measure can only be measured the numerical value on top margin (long limit), therefore the area of the cross section of gained can be greater than actual numerical value, and the tensile strength that draws at last will be less than real data, cause test data inaccurate, easily cause was that batten up to standard is surveyed into batten not up to standard originally, in this case, quite unfavorable to the manufacturing enterprise that batten is provided.
The utility model content
The purpose of this utility model is to provide a kind of injection mold of fast changeable core rod, realize quick die change by changing core rod, the core rod volume is little and lightweight, has reduced the requirement to operator's muscle power and skilled operation degree, accelerate die change speed, improved the production efficiency of moulding.
above-mentioned purpose of the present utility model can realize by following technical measures: a kind of injection mold of fast changeable core rod, formed by 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: the dynamic model main body is comprised of dynamic model frame and the moving-mould-core that is movably arranged on the dynamic model frame, the cover half main body is comprised of cover half frame and the cover half core that is movably arranged on the 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, the mobilizable profiled part of described core rod for separating with mould bases, described core rod is cube shaped blocks, the injection moulding die cavity is located in described core rod, moved by the die cavity that is arranged at least on described moving-mould-core or cover half core land area, form complete injection moulding die cavity after cover half core matched moulds, described moving-mould-core and cover half core dock by dynamic model frame and cover half frame the land area joint that makes two core rods respectively mutually realizes 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 injection moulding die cavity on core rod by passage, have respectively a horizontally extending core rod in front and back on the interface of described dynamic model frame and cover half frame chute is installed, described core rod is installed chute and is had be used to the plug-in mounting mouth that loads and unloads described core rod at its front end at least, described core rod is provided with installs the adaptive track of chute with described core rod so that core rod moves along core rod installation chute, and the core rod from described mould bases is installed and to be inserted chute or to split out by described plug-in mounting mouth, thereby realizes the replacing of core rod.
The utility model has the advantages that, only need to make a cover mould bases, the core rod of the different die cavitys of just can adapted making according to the batten standard of different performance index test, inject various test bars, not only can select suitable Shooting Technique for the performance requirement of different test bars, guarantee the quality of injection moulding test bars; And can also reach quick die change, and improve the purpose of die change efficient, in the time will making different test bars, only need master core is pulled down, change corresponding core rod and get final product.due to core rod without described mould guiding parts and ejecting mechanism main member, only with profiled part and cast with passage and allow the structures such as push-rod hole of ejecting mechanism push rod effect, therefore, its volume is little and lightweight, the replacing core rod will change whole dynamic model more than prior art and cover half wants easily much convenient, not only greatly reduce the physical fitness requirement to the operator, and can also reduce requirement to operator's skilled operation degree, mould replacing time is shortened greatly, the mould replacing time of prior art about 1 hour foreshortened in 1 minute, in addition, can also greatly save the die cost of making various test bars.
As a kind of embodiment of the present utility model, described mould guiding parts is matching used lead and fairlead, be located at respectively on described dynamic model frame and cover half frame and be positioned at the periphery that described core rod is installed chute, so that the dynamic model frame docks smoothly exactly with the cover half frame.
The utility model can be done following improvement, for the core rod setting because of movable installation of the push rod stroke of avoiding ejecting mechanism strengthens, described ejecting mechanism is comprised of with the core rod ejecting mechanism that is arranged on moving-mould-core the mould bases ejecting mechanism that is arranged on the dynamic model frame, in order to described push rod is divided into two sections, one section is arranged in the mould bases ejecting mechanism, be called thimble, another section is arranged in core rod, is called fore-set.The mould bases ejecting mechanism is the main body of ejecting mechanism, the core rod that is arranged on described dynamic model frame is installed in the base plate and the installation cavity between dynamic model frame base plate of chute, formed by push pedal, thimble fixed head, thimble, back-moving spring and guide pillar, push pedal is located at dynamic model frame base plate inner face, the thimble panel is used for thimble is fixed on push pedal, and back-moving spring is located, back-moving spring is clipped in core rod and installs between the base plate and thimble panel of chute, is used for after thimble advances, it being resetted; Described guide pillar has 2 at least, divide the end, front and back that is located at push pedal, an end of guide pillar is fixed on dynamic model frame base plate, and the other end is fixed on core rod and installs on the base plate of chute, the guide pillar middle part is set in push pedal at least, so that push pedal is along the guiding of the reciprocal translation of described guide pillar; Described thimble is installed the mould bases that arranges on the base plate of chute and is ejected endoporus and penetrate core rod and chute is installed and is applied on the fore-set of core rod ejecting mechanism and carry out the demoulding by being positioned at described core rod; During work, the outer hole that ejects that the push rod of injection machine passes on mould bases bottom 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, thimble is acted on the core rod ejecting mechanism by the described endoporus that ejects, promote moulding by the core rod ejecting mechanism again and separate with the injection moulding die cavity, thereby realize the moulding demoulding.
As a kind of embodiment of the present utility model, described core rod ejecting mechanism is positioned at the push-rod hole of moving-mould-core, formed by fore-set, limiting component and reset components, described core rod push-rod hole is relative with passage with the described cast on core rod, described limiting component is spacing in described centre hole with fore-set, and reset components makes fore-set complete and ejects the rear homing of action.
as a kind of improvement of the present utility model, described core rod connects before and after chute is installed, be provided with rotary stopper spare on described plug-in mounting mouth limit, the rear port that chute is installed at described core rod is provided with limited block, the described core rod that described limited block lays respectively on dynamic model frame and cover half frame is installed on the groove bottom of chute, being limited in described core rod with the core rod that is used for inserting installs in chute and the location, and described rotary stopper spare is hinged on respectively on the front end face of dynamic model frame and cover half frame, after the core rod that moving-mould-core and cover half core is inserted respectively dynamic model frame and cover half frame is installed in chute, it is spacing on mould bases that rotation rotary stopper spare to die core front end face is about to core rod.During the dismounting core rod, turn-off rotary stopper spare can shift out core rod the core rod of mould bases chute is installed.Both helped quick die change, guaranteed again that the core rod Fast Installation put in place and reliably working.
Realizing on the basis of above quick die change, the utility model can also further be done following improvement: die cavity is arranged on single core rod, namely only be arranged on the land area of moving-mould-core or only be arranged on the land area of cover half core, the land area of another core rod is without die cavity, be the plane, this core rod is applicable to the injection moulding of the moulding of standard testing batten or analogous shape, helps to simplify mould structure, improve the manufacturability of mould, reduce die cost.
on the basis of above-mentioned core rod mold cavity configuration, can also further do following improvement: described single core rod has in the situation of die cavity, described die cavity profile is greater than moulding, it only has the partial contour line of moulding, die cavity space greater than moulding is used for holding a movable insert, this movable insert is used for forming the profile of moulding another part, described movable insert is fixed on the land area of that core rod that land area is the plane, and protrude from described land area, the height and the described die cavity height that protrude adapt, it has the part outline line that is not limited by die cavity with moulding, 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.this employing movable insert is combined the advantage that the structure of the injection moulding chamber that forms complete moulding profile has and is with die cavity, both improved the manufacturability of mould, help again the demoulding of moulding, improve the harmful effect that force demoulding causes the moulding performance, although because moving, the land area of cover half core is positioned at the end face of moulding, but still the contact-making surface that can make moulding and injection moulding chamber is dispersed on moving-mould-core and cover half core, in die sinking, the partial contour of moulding is just the core rod disengaging on plane with land area, make ejecting mechanism only need apply less thrust and can make the moulding demoulding.
the following embodiment that the utility model is recommended: 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, die cavity is set on moving-mould-core, the land area of cover half core is the plane, on the land area of described cover half core, movable insert is set, the cavity quantity that arranges on described movable insert and moving-mould-core is identical, it is two as the die cavity that arranges on moving-mould-core, the movable insert on the cover half core is also two, before and after being centered by described plug hole, described movable insert distributes, 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, can form 2~4 injection moulding chambers that are used for the single moulding of injection moulding, each injection moulding chamber is communicated with described sprue by cast gate by runner.
The another kind of embodiment that the utility model is recommended 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 is withdrawn from die cavity along with moving of dynamic model, the cylindricality feed back that moulding forms take sprue more helps the light demoulding of moulding as fulcrum rotates and occurs to become flexible towards the left a blank direction of position of movable insert.
In order further to improve die change efficient; guarantee accuracy and the security of die change; be respectively equipped with the keeper that cooperatively interacts on the land area of cover half core described in the utility model and moving-mould-core; described keeper adopts the adaptive keeper of a pair of and mutual centering at least; described keeper lays respectively at the periphery of the die cavity of described cover half core and moving-mould-core; the position of land area that is in core rod with described keeper is different and distinguish different core rods, is only namely that the cover half core of same set of core rod is corresponding with every pair of keeper on moving-mould-core.Described keeper can specifically adopt locating dowel and locating hole.On different core rods, the position of keeper is different, and when matched moulds, the fixed half and moving half that only has corresponding to the same position keeper belongs to same set of core rod, and the fixed half and moving half that belongs to same set of core rod could be realized matched moulds; And the locating piece position that does not belong on the fixed half and moving half of same set of core rod is different, and keeper is not corresponding, and the fixed half and moving half that does not therefore belong to same set of core rod can't matched moulds, so, has guaranteed accuracy and the security of die change, has further improved die change efficient.
when die sinking, be bonded in for fear of the cylindricality feed back in the sprue of moving-mould-core and be difficult for the demoulding, as a kind of improvement of the present utility model, the end face of the fore-set in described core rod ejecting mechanism is the inclined-plane, have a triangle angle below described inclined-plane, the incline direction of described angle is identical with the incline direction on described inclined-plane, has the space between the hole wall of described inclined-plane and core rod push-rod hole, described angle forms with the hole wall of core rod push-rod hole the space that communicates with described space, this space is as the chamber of injection moulding cylindricality feed back lower end, make when die sinking described angle catch on cylindricality feed back lower end to avoid during it is bonded in sprue, and after ejecting moulding along the inclined-plane, angle takes off moulding and realizes the demoulding.The utility model along the inclined-plane, angle takes off moulding, when taking, moulding is stressed little, and the performance of moulding is not exerted an influence substantially.
For the ease of core rod being put into mould bases or being taken 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 lays respectively on the rear end of cover half core and moving-mould-core.So that the workman loads and unloads core rod fast steadily.
Compared with prior art, the utlity model has following significant effect:
⑴ the utility model only need be made a cover mould bases, the core rod of the different die cavitys of just can adapted making according to the batten standard of different performance index test, inject various test bars, not only can select suitable Shooting Technique for the performance requirement of different test bars, guarantee the quality of injection moulding test bars; And can also reach quick die change, and improve the purpose of die change efficient, in the time will making different test bars, only need master core is pulled down, change corresponding core rod and get final product.Because the volume of core rod is little and lightweight, die change is easily convenient more than prior art, not only greatly reduce the physical fitness requirement to the operator, and can also reduce requirement to operator's skilled operation degree, mould replacing time is shortened greatly, the mould replacing time of prior art about 1 hour foreshortened in 1 minute, in addition, can also greatly save the die cost of making various test bars.
⑵ limited block of the present utility model and rotary stopper spare are jointly spacing in core rod is installed chute with core rod, prevent that core rod from deviating from, and have both helped quick die change, guarantee that again core rod is in place and reliably working.
⑶ running channel of the present utility model is shorter, and the raw material that remains on running channel is few, has saved raw material, has reduced cost, reduce simultaneously the reduction of raw material, can not produce considerable influence to the density of moulding, and, during pressurize, the pressure consume is little, and pressurize is easy, has guaranteed the quality of moulding; By changing core rod, difform movable insert coordinates the different injection moulding die cavity of formation from die cavity, can satisfy the Shooting Technique requirement of various battens, produce the standard batten that need to carry out whole test indexs, can realize to test a variety of performance indications and different materials in the making of the batten of the mutually not equal multiple situation of different times test event to the various battens of same material.
⑷ the utility model is arranged on scheme on single core rod with die cavity, is applicable to the injection molding of the moulding of standard testing batten or analogous shape, helps to simplify mould structure, improves the manufacturability of mould, reduces die cost.
⑸ the utility model is on the basis that ⑷ is ordered, two die cavitys on core rod and corresponding movable insert left and right thereof are staggeredly arranged, during die sinking, along with movable insert is withdrawn from die cavity, moulding can be pour point turn certain angle a little around cylindricality feed back center because partial contour is open, eject and realize the demoulding for ejecting the moulding of naming a person for a particular job with pour point again, the rotation of moulding is translational motion, its stressed be level to active force, moulding is stressed evenly, and moulding is ejected take pour point as the summit, moulding stressed little, the demoulding is easy, and moulding is difficult for deforming, therefore the utility model mold materials is applied widely, and test data is accurate, because the knockout course of test bars can not produce impact on performance to batten, therefore further improved the quality of batten, make the performance indications of the performance of batten and material basically identical, guaranteed to use the quality of the made product of this material.
⑹ on different core rod, 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 be realized matched moulds; And the cover half core that does not belong to same set of core rod is different with the locating piece position on moving-mould-core, therefore can't matched moulds, so, guaranteed accuracy and the security of die change, and further improved die change efficient.
⑺ fore-set has angle, make after this angle catches on cylindricality feed back lower end and ejecting moulding when die sinking along the inclined-plane, angle takes off moulding, when die sinking, can avoid the cylindricality feed back to be bonded in sprue, and along the inclined-plane, angle takes off moulding, when taking, moulding is stressed little, and the performance of moulding is not exerted an influence substantially.
⑻ core rod of the present utility model can increase core rod in real time according to the demand of standard batten, fast and easy, and efficient is higher, and can not waste, and has reduced cost.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the front view of the mould bases of the utility model embodiment 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 cutaway view along Fig. 1;
Fig. 5 is along the cutaway view of the B-B line of Fig. 3 after the combination of moving mold and cover half frame;
Fig. 6 is that in embodiment 1, core rod is arranged on 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 moving-mould-core and the rear cutaway view along C-C line in Fig. 8 of cover half core combination in embodiment 1;
Figure 11 is D enlarged diagram in Figure 10;
Figure 12 is moving-mould-core and the rear cutaway view along E-E line in Fig. 8 of cover half core combination in embodiment 1;
Figure 13 is the land area view that the utility model embodiment 2 makes the cover half core of impact bending test bars;
Figure 14 is the land area view of embodiment 2 moving-mould-cores;
Figure 15 is the front view of the moulding of embodiment 2 making;
Figure 16 is moving-mould-core and the rear cutaway view along F-F line in Figure 14 of cover half core combination in embodiment 2;
Figure 17 is moving-mould-core and the rear cutaway view along G-G line in Figure 14 of cover half core combination in embodiment 2;
Figure 18 is the schematic diagram (the cover half core only draws the movable insert on it) when in embodiment 2, after the combination of cover half core and moving-mould-core, movable insert is positioned at die cavity;
Figure 19 is the schematic diagram of fore-set in the core rod ejecting mechanism;
Figure 20 is mould schematic diagram of the prior art.
The specific embodiment
Embodiment 1
as Fig. 1~12, shown in 19, it is the injection mold of a kind of fast changeable core rod of the utility model, in the present embodiment, to make the testing standard batten, referring to Fig. 9, injection mold is comprised of dynamic model and cover half, wherein, dynamic model and cover half include profiled part, ejecting mechanism, mould guiding parts and running gate system, the dynamic model main body is comprised of dynamic model frame 22 and the moving-mould-core 12 that is movably arranged on dynamic model frame 22, the cover half main body is comprised of cover half frame 21 and the cover half core 11 that is movably arranged on cover half frame 21, dynamic model frame 22 is referred to as mould bases with cover half frame 21, moving-mould-core 12 is referred to as core rod with cover half core 11, the mobilizable profiled part of core rod for separating with mould bases, core rod is cube shaped blocks, the injection moulding die cavity is located in core rod, moved by the die cavity that is arranged at least on moving-mould-core or cover half core land area, form complete injection moulding die cavity 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 dock by dynamic model frame 22 and cover half frame 21 the land area joint that makes two core rods respectively mutually realizes 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 injection moulding die cavity on core rod by passage; Have respectively a horizontally extending core rod in front and back on the interface of dynamic model frame 22 and cover half frame 21 chute 80,90 is installed, core rod is installed chute and is had for the plug-in mounting mouth that loads and unloads core rod at its front end, core rod is provided with installs the adaptive track of chute with core rod so that core rod moves along core rod installation chute, and the core rod from mould bases is installed and to be inserted chute or to split out by the plug-in mounting mouth, thereby realizes the replacing of core rod.
Track on core rod is installed coordinating of chute with core rod and is adopted strip slide block 111 and chute 86, and wherein, slide block 111 is positioned on four sides of core rod, and 86 of chutes are positioned at core rod to be installed on four sides of chute, and slide block 111 is arranged in chute.
core rod connects before and after chute is installed, be provided with rotary stopper spare 3 on plug-in mounting mouth limit, the rear port that chute is installed at core rod is provided with limited block 4, the core rod that limited block 4 lays respectively on dynamic model frame and cover half frame is installed on the groove bottom of chute, being limited in core rod with the core rod that is used for inserting installs in chute and the location, and rotary stopper spare 4 is hinged on respectively on the front end face of dynamic model frame 22 and cover half frame 21, when the core rod that moving-mould-core 12 and cover half core 11 is inserted respectively dynamic model frame 22 and cover half frame 21 is installed chute 80, 90 interior after, it is spacing on mould bases that rotation rotary stopper spare 4 to die core front end face is about to core rod, during the dismounting core rod, turn-off rotary stopper spare, core rod can be shifted out the core rod of mould bases chute is installed.
The 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, is positioned at the periphery that dynamic model frame 22 and the core rod of cover half frame 21 are installed chute, realizes 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 on realizes in fairlead 32 that the cover half frame fixes with docking of dynamic model frame.
Ejecting mechanism is comprised of with the core rod ejecting mechanism 6 that is arranged on moving-mould-core the mould bases ejecting mechanism 5 that is arranged on dynamic model frame 22, in order to push rod is divided into two sections, one section is arranged in the 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 that is arranged on dynamic model frame 22 is installed in the base plate and the installation cavity between dynamic model frame base plate of chute, wherein, dynamic model frame base plate is comprised of square iron 223 and base plate 224, square iron was located at the both sides of base plate 224 in 223 minutes, and the base plate of core rod installation chute is comprised of dynamic mould fixing plate 221 and chute base plate 222, the both sides that dynamic mould fixing plate was located at chute base plate 222 in 221 minutes consist of 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 model frame base plate inner face, thimble panel 522 is used for thimble 229 is fixed on push pedal 511, and back-moving spring 227 is located, back-moving spring 227 is clipped in core rod and installs between the base plate and thimble panel 522 of chute, be used for after thimble 229 advances, it being resetted, guide pillar 228 has 4, divide in pairs the end, front and back that is located at push pedal 511, an end of guide pillar 228 is fixed on dynamic model frame base plate, and the other end is fixed on core rod and installs on the base plate of chute, guide pillar 228 middle parts are set in push pedal 511, so that push pedal 511 is along the guiding of guide pillar 228 reciprocal translations, 229, thimble is installed the mould bases that arranges on the base plate of chute and is ejected endoporus and penetrate core rod and chute is installed and is applied on the fore-set of core rod ejecting mechanism and carry out the demoulding by being positioned at core rod.During work, the outer hole that ejects that the push rod of injection machine passes on mould bases bottom contacts in the push pedal of mould bases ejecting mechanism, promote the spatial translation between thimble panel and installation chute base plate of push pedal and thimble panel, thimble is acted on the core rod ejecting mechanism by ejecting endoporus, promote moulding by the core rod ejecting mechanism again and separate with the injection moulding die cavity, thereby realize the moulding demoulding.
In the present embodiment, guide pillar 228 middle parts are set in push pedal 511, specifically be provided with the installation through hole on push pedal and thimble panel, 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 outer hole 225 front ends, push rod by injection machine promotes to move along guide pillar by middle care set, and thimble is upwards released.The outer wall of middle care set 230 is provided with annular flange flange 7 along its circumference, on the hole wall circumference of installation through hole, correspondence is provided with annular slot, through hole is installed to be comprised of with the stepped hole that is positioned in push pedal the straight hole that is positioned on the thimble panel, stepped hole is made of two sections up big and down small concentric different diameter holes, the aperture of upper sector hole forms annular slot greater than the aperture of straight hole, annular flange flange is arranged in annular slot.
Cover half frame 21 comprises be used to the locating ring 212, cover half panel 213 and the cover half fixed head 214 that are positioned on injection machine, locating ring 212 is positioned at the centre of cover half panel 213, injection moulding jack 211 is located on cover half panel 213 and is positioned at locating ring 212, and the cover half fixed head was located at the both sides of cover half panel 213 in 214 minutes and formed cover half installation chute 90.
die cavity is arranged on single core rod, namely only be arranged on the land area of moving-mould-core or only be arranged on the land area of cover half core, the land area of another core rod is without die cavity, be the plane, single core rod has in the situation of die cavity, the die cavity profile is greater than moulding, it only has the partial contour line of moulding, die cavity space greater than moulding is used for holding a movable insert, this movable insert is used for forming the profile of moulding another part, movable insert is fixed on the land area of that core rod that land area is the plane, and protrude from land area, the height and the die cavity height that protrude adapt, it has the part outline line that is not limited by die cavity with moulding, 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, on moving-mould-core 12, die cavity is set, the land area of cover half core 11 is the plane, on the land area of cover half core 11, movable insert is set, the cavity quantity that arranges on movable insert and moving-mould-core 12 is identical, in the present embodiment, the die cavity 122 that arranges on moving-mould-core 12 is two, the movable insert 112 on cover half core 11 is also two, before and after being centered by plug hole, movable insert 112 distributes, stagger in two die cavitys and corresponding movable insert left and right 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, can form 2 injection moulding chambers that are used for the single moulding of injection moulding, in the present embodiment, moulding is extension test batten 100, referring to Fig. 9, each injection moulding chamber is communicated with sprue by cast gate by runner 123.The core rod ejecting mechanism is positioned at the middle part of moving-mould-core, during die sinking, piece moulding inlaying is withdrawn from die cavity along with moving of dynamic model, the cylindricality feed back that moulding forms take sprue more helps the light demoulding of moulding as fulcrum rotates and occurs to become flexible towards the left a blank direction of position of piece moulding inlaying.
For core rod easy to make, die cavity 122 is mainly by fixedly mold insert 124 and groove form, fixedly mold insert 124 arranges along a side channel wall of groove, and two fixedly mold insert 124 along the lateral alternate of moving-mould-core 12, cover half core 11 makes movable insert 112 be positioned at die cavity 122 with moving-mould-core 12 matched moulds and abuts against formation injection moulding die cavity on the opposite side cell wall of groove, referring to Fig. 8.Cover half core 11 is fixed up and down and is consisted of by upper cover half central layer 113 and lower cover half central layer 114 respectively, moving-mould-core 12 is fixed up and down and is consisted of by upper dynamic model central layer 51 and lower dynamic model central layer 52 respectively, movable insert is positioned on lower cover half central layer 114, and die cavity is positioned on dynamic model central layer 51; Be equipped with in plug hole be used to the sprue bush 53 of accepting the injection machine injection nozzle, sprue is the inner duct 54 of sprue bush, the inner duct 54 of sprue bush 53 is comprised of the lower sector hole of sector hole and flaring on the infundibulate on top, has annular flange flange 55 on the outer wall of sprue bush 53, the hole wall of plug hole is provided with annular bayonet socket corresponding to the position of annular flange flange 55, and annular flange flange is positioned at annular bayonet socket with fixing sprue bush.
Be respectively equipped with the keeper that cooperatively interacts on the land area of cover half core 11 and moving-mould-core 12, keeper adopts the adaptive keeper of a pair of and mutual centering at least, keeper lays respectively at the periphery of the die cavity of cover half core and moving-mould-core, the position of land area that is in core rod with keeper is different and distinguish different core rods, is only namely that the cover half core of same set of core rod is corresponding with every 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 four jiaos of cover half core land area, locating dowel 42 is positioned on four jiaos of moving-mould-core land area, the setting position of locating dowel and locating hole is corresponding, and during matched moulds, locating dowel 42 is arranged in locating hole 43 and plays guiding and the accurately effect of location.
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 comprised of fore-set 62, limiting component and reset components, and limiting component is spacing in centre hole with fore-set, and reset components makes fore-set complete and ejects the rear homing of action.reset components adopts spring 63, limiting component adopts spacer 64 and ejector sleeve 61, the core rod push-rod hole is relative with passage with the cast on core rod, the 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 mainly large and upper by the stage casing, three sections concentric different diameter holes that hypomere is little form, 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 passes spacer 64 and spring 63 and upwards stretches in the epimere hole, the head 621 of fore-set 62 is fixed in ejector sleeve 61 by spacer 64, the upper end of spring 63 contacts on the top of middle sector hole, the lower end contacts on spacer 64, thimble on dynamic model frame 22 upwards promotes ejector sleeve by lower sector hole, fore-set is contacted on the cylindricality feed back and jack-up that moulding is made progress is realized the demoulding or cancel thrust that fore-set is resetted under the effect of spring restoring force.The boss that forms hollow is protruded in sector hole downwards in the middle part, bottom surface of ejector sleeve 61, and the head of fore-set 62 is positioned at this boss, and spacer 64 is on the reducing step surface, and the table top of boss is concordant with the lower peritreme of lower sector hole; Have ring-shaped step on the top of middle sector hole and realize spacing to ejector sleeve so that ejector sleeve moves up to contact on ring-shaped step.
The end face of the fore-set 62 in the core rod ejecting mechanism is inclined-plane 400, the below, inclined-plane has a triangle angle 622, the incline direction of angle 622 is identical with the incline direction on inclined-plane 400, has the space between the hole wall of inclined-plane 400 and core rod push-rod hole, angle 622 forms with the hole wall of core rod push-rod hole the space that communicates with the space, this space is as the chamber of injection moulding cylindricality feed back lower end, make when die sinking angle catch on cylindricality feed back lower end avoiding during it is bonded in sprue, and after ejecting moulding along the inclined-plane, angle takes off moulding and realizes the demoulding.Referring to 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 the workman loads and unloads core rod fast steadily.
The course of work of the present utility model is:
⑴ change core rod: when the tensile bars of embodiment 1 is made complete, when needing to make the standard testing batten of embodiment 2, realize by changing core rod, be that both hands pull coordinating between the core rod installation chute of the guide rail of handle by core rod and mould bases that the core rod of embodiment 1 is extracted out from mould bases, 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 rods is different, therefore when inserting the cover half core of embodiment 2 and moving-mould-core in the mould bases, if after having occured to insert the cover half core of 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 can't insert cover half core matched moulds with embodiment 2, guaranteed the safety of matched moulds.
⑵ production standard test bars: cover half core and moving-mould-core matched moulds, form the injection moulding die cavity on land area, the injection nozzle of injection machine inserts in sprue bush, fused solution flows in the injection moulding die cavity by runner, cast gate from sprue by sprue bush, after naturally cooling, two battens that are formed for testing in the injection moulding die cavity are to be molded over the interior cylindricality feed back of sprue and the plates that are molded in runner and cast gate between two battens.
⑶ 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, make the cylindricality feed back can not be bonded in sprue bush, simultaneously, along with movable insert is withdrawn from die cavity, the standard testing batten can be pour point turn certain angle a little around the cylindricality feed back, produce loosening, the mould bases of the push rod of injection machine by the dynamic model frame ejects outer hole and contacts in push pedal, making thimble panel and push pedal drive thimble moves up, thimble promotes ejector sleeve, push rod contacts the cylindricality feed back, at this moment, inclined-plane and angle along fore-set take off the injection moulding batten, this kind stripping means, batten is stressed little, its performance is not exerted an influence substantially.
⑷ fracture to take out test bars for forming fracture between the batten of testing and middle part plates along fracture.
Embodiment 2
as shown in Figure 13~18, the present embodiment is from the difference part of embodiment 1: the injection moulding die cavity on core rod is different, referring to Figure 15, the applicable moulding of the present embodiment core rod is cantilever beam 91, crooked standard testing batten 92, normal of impact test bars 93, be provided with 2 movable inserts 70 on the land area of cover half core 11, 71, before and after being centered by plug hole (being the inner duct 54 of sprue bush), movable insert distributes, be provided with 2 die cavitys 73 on the land area of moving-mould-core 12, 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, it is movable insert 70, 71 lay respectively on the medium position of die cavity of moving-mould-core, the shape of 4 injection moulding chambers adapts with moulding shape to be produced respectively, be formed for making two cantilever beams, crooked, 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.
Be provided with locating dowel 42 on four jiaos of the upper dynamic model central layer of moving-mould-core, be provided with locating hole 43 on four jiaos of the lower dynamic model central layer of cover half core, the setting position of locating dowel and locating hole is corresponding, the setting position of this locating dowel 42 locating dowel on the setting position on core rod and embodiment 1 core rod and locating hole with locating hole 43 is slightly different, and the fixed half and moving half that belongs to same set of core rod could be realized matched moulds.
Embodiment of the present utility model is not limited to this; according to foregoing of the present utility model; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model also has modification, replacement or the change of various ways, within all dropping on the utility model rights protection scope.

Claims (12)

1. the injection mold of a fast changeable core rod, formed by 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: the dynamic model main body is comprised of dynamic model frame and the moving-mould-core that is movably arranged on the dynamic model frame, the cover half main body is comprised of cover half frame and the cover half core that is movably arranged on the 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, the injection moulding die cavity is located in described core rod, moved by the die cavity that is arranged at least on described moving-mould-core or cover half core land area, form complete injection moulding die cavity after cover half core matched moulds, described moving-mould-core and cover half core dock by dynamic model frame and cover half frame the land area joint that makes two core rods respectively mutually realizes 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 injection moulding die cavity on core rod by passage, have respectively a horizontally extending core rod in front and back on the interface of described dynamic model frame and cover half frame chute is installed, described core rod is installed chute and is had be used to the plug-in mounting mouth that loads and unloads described core rod at its front end at least, described core rod is provided with installs the adaptive track of chute with described core rod so that core rod moves along core rod installation chute, and the core rod from described mould bases is installed and to be inserted chute or to split out by described plug-in mounting mouth, thereby realizes the replacing of core rod.
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, be located at respectively on described dynamic model frame and cover half frame and be positioned at the periphery that described core rod is installed chute, so that the dynamic model frame docks smoothly exactly with the cover half frame.
3. the injection mold of fast changeable core rod according to claim 2, it is characterized in that: described ejecting mechanism is comprised of with the core rod ejecting mechanism that is arranged on moving-mould-core the mould bases ejecting mechanism that is arranged on the dynamic model frame, in order to described push rod is divided into two sections, one section is arranged in the mould bases ejecting mechanism, be called thimble, another section is arranged in core rod, be called fore-set, the mould bases ejecting mechanism is the main body of ejecting mechanism, the core rod that is arranged on described dynamic model frame is installed in the base plate and the installation cavity between dynamic model frame base plate of chute, by push pedal, the thimble fixed head, thimble, back-moving spring and guide pillar form, push pedal is located at dynamic model frame base plate inner face, the thimble panel is used for thimble is fixed on push pedal, and back-moving spring is located, back-moving spring is clipped in core rod and installs between the base plate and thimble panel of chute, be used for after thimble advances, it being resetted, described guide pillar has 2 at least, divide the end, front and back that is located at push pedal, an end of guide pillar is fixed on mould framing plate, and the other end is fixed on core rod and installs on the base plate of chute, the guide pillar middle part is set in push pedal at least, so that push pedal is along the guiding of the reciprocal translation of described guide pillar, described thimble is installed the mould bases that arranges on the base plate of chute and is ejected endoporus and penetrate core rod and chute is installed and is applied on the fore-set of core rod ejecting mechanism and carry out the demoulding by being positioned at described core rod.
4. the injection mold of fast changeable core rod according to claim 3, it is characterized in that: described core rod ejecting mechanism is positioned at the push-rod hole of moving-mould-core, formed by fore-set, limiting component and reset components, described core rod push-rod hole is relative with passage with the described cast on core rod, described limiting component is spacing in described centre hole with fore-set, and reset components makes fore-set complete and ejects the rear homing of action.
5. the injection mold of fast changeable core rod according to claim 4, it is characterized in that: described core rod connects before and after chute is installed, be provided with rotary stopper spare on described plug-in mounting mouth limit, the rear port that chute is installed at described core rod is provided with limited block, the described core rod that described limited block lays respectively on dynamic model frame and cover half frame is installed on the groove bottom of chute, being limited in described core rod with the core rod that is used for inserting installs in chute and the location, and described rotary stopper spare is hinged on respectively on the front end face of dynamic model frame and cover half frame, after the core rod that moving-mould-core and cover half core is inserted respectively dynamic model frame and cover half frame is installed in chute, it is spacing on mould bases that rotation rotary stopper spare to die core front end face is about to core rod.
6. the injection mold of according to claim 1~5 described fast changeable core rods of any one, it is characterized in that: described die cavity is arranged on single core rod, namely only be arranged on the land area of moving-mould-core or only be arranged on the land area of cover half core, the land area of another core rod is the plane without die cavity.
7. the injection mold of fast changeable core rod according to claim 6, it is characterized in that: described single core rod has in the situation of die cavity, described die cavity profile is greater than moulding, it only has the partial contour line of moulding, die cavity space greater than moulding is used for holding a movable insert, this movable insert is used for forming the profile of moulding another part, described movable insert is fixed on the land area of that core rod that land area is the plane, and protrude from described land area, the height and the described die cavity height that protrude adapt, it has the part outline line that is not limited by die cavity with moulding, 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.
8. the injection mold of fast changeable core rod according to claim 7, 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, die cavity is set on moving-mould-core, the land area of cover half core is the plane, on the land area of described cover half core, movable insert is set, the cavity quantity that arranges on described movable insert and moving-mould-core is identical, the die cavity that arranges on moving-mould-core is two, the movable insert on the cover half core is also two, before and after being centered by described plug hole, described movable insert distributes, two die cavitys on described moving-mould-core are corresponding with described piece moulding inlaying, when cover half core and moving-mould-core matched moulds, movable insert is arranged in the die cavity on described moving-mould-core, can form 2~4 injection moulding chambers that are used for the single moulding of injection moulding, each injection moulding chamber is communicated with described sprue by cast gate by runner.
9. the injection mold of fast changeable core rod according to claim 8, 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 is withdrawn from die cavity along with moving of dynamic model, the cylindricality feed back that moulding forms take sprue rotates and occurs to become flexible towards the left a blank direction of position of movable insert as fulcrum, so that the moulding demoulding.
10. the injection mold of fast changeable core rod according to claim 9, it is characterized in that: be respectively equipped with the keeper that cooperatively interacts on the land area of described cover half core and moving-mould-core, described keeper adopts the adaptive keeper of a pair of and mutual centering at least, described keeper lays respectively at the periphery of the die cavity of described cover half core and moving-mould-core, the position of land area that is in core rod with described keeper is different and distinguish different core rods, is only namely that the cover half core of same set of core rod is corresponding with every pair of keeper on moving-mould-core.
11. the injection mold of fast changeable core rod according to claim 10, it is characterized in that: the end face of the fore-set in described core rod ejecting mechanism is the inclined-plane, have a triangle angle below described inclined-plane, the incline direction of described angle is identical with the incline direction on described inclined-plane, has the space between the hole wall of described inclined-plane and core rod push-rod hole, described angle forms with the hole wall of core rod push-rod hole the space that communicates with described space, this space is as the chamber of injection moulding cylindricality feed back lower end, make when die sinking described angle catch on cylindricality feed back lower end to avoid during it is bonded in sprue, and after ejecting moulding along the inclined-plane, angle takes off moulding and realizes the demoulding.
12. the injection mold of fast changeable core rod according to claim 11, 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 lays respectively on the rear end of cover half core and moving-mould-core.
CN 201320213428 2012-11-09 2013-04-24 Injection mould with rapidly-replaced mold core Withdrawn - After Issue CN203267086U (en)

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