CN104149279A - Capping plug injection mould and capping plug injection moulding method - Google Patents
Capping plug injection mould and capping plug injection moulding method Download PDFInfo
- Publication number
- CN104149279A CN104149279A CN201410424120.4A CN201410424120A CN104149279A CN 104149279 A CN104149279 A CN 104149279A CN 201410424120 A CN201410424120 A CN 201410424120A CN 104149279 A CN104149279 A CN 104149279A
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- China
- Prior art keywords
- ejector pin
- pin retaining
- retaining plate
- plate
- push rod
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2618—Moulds having screw-threaded mould walls
- B29C45/262—Moulds having screw-threaded mould walls provided with unscrewing drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C2045/4084—Progressive ejection
Abstract
The invention discloses a capping plug injection mould and a capping plug injection moulding method. The capping plug injection mould comprises a lower mould base plate, bearing feet, a bearing plate, a mould core fixed plate, a Haff fixed plate, a small mould core fixed plate and an upper mould base plate from bottom to top. A Haff structure with a thread forming cavity is arranged in the Haff fixed plate and is composed of two pieces of Haff, and a mould core and a small mould core are correspondingly arranged. The mould further comprises a secondary push-off device composed of a first pushing rod fixed plate, a second pushing rod fixed plate, a third pushing rod fixed plate, a pushing rod, a conical pushing rod and a sprue puller, and a swing hook mechanism composed of a swing hook reset plate, a swing hook, a guide rod and a spring is arranged on the secondary push-off device. The injection moulding method comprises mould assembling, injection moulding, cooling, and mould opening ejection. According to the mould opening ejection step, secondary ejection is achieved under matching of the swing hook mechanism. According to the injection mould and the injection moulding method, the mould is simple, demoulding is easy, and injection moulding and mould opening can be achieved without a dedicated injection molding machine.
Description
Technical field
The present invention relates to carry out thering is externally threaded capping plug mould and the injection moulding process of injection moulding.
Background technology
In injection mo(u)lding, for the product with external screw thread or internal thread, its shaping and demoulding is all a great problem.For the threaded product of tool, have at present by rotatable there is the core body of screw thread die cavity or there is externally threaded core body carry out moulding, and utilize transmission mechanism to drive core body rotation to realize the demoulding, although the mould of this structure is in the time of shaped article, precision when threaded portion moulding can be relatively high, but in knockout course, easily damage the threaded portion of moulding, and the complex structure of this mould, demoulding difficulty, meanwhile, also need special injection machine to carry out drive transmission device and realize demoulding action.
Summary of the invention
The object of this invention is to provide that a kind of mould is simple, the demoulding is easier to, do not need special injection machine can realize injection mould and the injection moulding process of injection moulding and die sinking.
For achieving the above object, capping plug injection mould, comprises counterdie seat board, two support foots, support plate, core fixing plate, small-sized core fixed head, upper clamping plate, gate bush, centring ring, push rod, guide pin bushing and guide pillars; Counterdie seat board is provided with and ejects hole; The lower end of support foot is arranged on counterdie seat board, between two support foots, is formed with storage tank; Support plate is fixed on the upper end of support foot; Core fixing plate is fixed on support plate; Small-sized core fixed head is fixed on upper clamping plate; The lower end of gate bush extend in small-sized core fixed head through upper clamping plate; Centring ring is fixed on upper clamping plate and is enclosed within on gate bush upper end; Guide pin bushing is arranged on small-sized core fixed head, and the upper surface of guide pin bushing is kept out by upper clamping plate; Between core fixing plate and small-sized core fixed head, be provided with Hough fixed head, Hough fixed head is provided with the accommodating cavity of two up/down perforations, and wherein two opposite faces of accommodating cavity are bottom-up outward extending inclined-plane; In accommodating cavity, be provided with one group of half slide structure, described half slide structure is coordinated and is formed by two symmetrical Houghs, and described Hough comprises the hypotenuse that coordinates with accommodating cavity inclined-plane and the relative straight flange with hypotenuse; On the straight flange of Hough, be provided with the semicircle atrium of top-down, the inwall of atrium is provided with screw thread, and opening corresponding to rear two Houghs of two Hough combinations that is positioned at same accommodating cavity forms thread forming chamber; On core fixing plate, be fixed with upper end and pass and stretch out the core of half slide structure through thread forming chamber; On small-sized core fixed head, be provided with the die cavity corresponding with position, thread forming chamber, on small-sized core fixed head, be provided with lower end and extend into the small-sized core in die cavity; In storage tank, be provided with the first ejector pin retaining plate, the second ejector pin retaining plate and the 3rd ejector pin retaining plate from bottom to up, the first ejector pin retaining plate is fixedly connected with the second ejector pin retaining plate, the middle part of the first ejector pin retaining plate has the first through hole, and the second ejector pin retaining plate is provided with the second through hole communicating with the first through hole; The upper end of push rod contacts with Hough with core fixing plate through the second ejector pin retaining plate, the 3rd ejector pin retaining plate, support plate, and the lower end of push rod is kept out by the first ejector pin retaining plate; On the 3rd fixed head, be fixed with cone push rod, the upper end of cone push rod is up big and down small taper, the lower end of cone push rod is fixed on the 3rd ejector pin retaining plate through core, support plate, and in cone push rod, between the 3rd ejector pin retaining plate and support plate, cover has back-moving spring; On Hough fixed head, be positioned at gate bush sprue below be provided with up-small and down-big conical cavity, on the 3rd ejector pin retaining plate, be fixed with through support plate, core fixing plate, Hough fixed head the sprue puller corresponding to conical cavity; At the fixing swing hook restoring board in the two opposite sides of the first ejector pin retaining plate, swing hook fixed head comprises the upwardly extending restoring board of fixed part and self-retaining portion outer end, and restoring board is provided with kidney slot, between restoring board and the first ejector pin retaining plate, has space; The hinged inside that is positioned at restoring board in the two opposite sides of the second ejector pin retaining plate has swing hook, and the inner side, middle part of swing hook is provided with the snap fit that hooks the 3rd ejector pin retaining plate, and the inner side, upper end of swing hook is provided with guiding surface; On support plate, be provided with the skewed slot coordinating with guiding surface; On swing hook, be provided with the guide post that extend into kidney slot, on guide post, between swing hook and restoring board, cover has spring.
Utilize the method step of above-mentioned Injection Mold Formation capping plug as follows:
(1) matched moulds, in matched moulds process, half slide structure resets in accommodating cavity, and push rod, cone push rod, sprue puller reset, and swing hook resets under the effect of spring, and the snap fit holding of swing hook is on the 3rd ejector pin retaining plate;
(2) utilize injection machine to injecting material in gate bush, material enters in moulding die cavity through sprue, the runner of gate bush, and wherein moulding die cavity is made up of die cavity, thread forming chamber, small-sized core, core;
(3) after injection moulding completes, cooling;
(4) die sinking ejects capping plug, detailed process is: the push rod of injection machine is applied on the 3rd ejector pin retaining plate through the first through hole, the second through hole, die sinking, upper clamping plate, small-sized core fixed head, centring ring, gate bush are moved upward, small-sized core fixed head separates with Hough fixed head, the material that is positioned at sprue separates from sprue, and throw off in die cavity the upper end of capping plug; Push rod gives thrust upwards, in the process that starts to eject at push rod, the snap fit holding of swing hook is on the 3rd ejector pin retaining plate, now, the first ejector pin retaining plate, the second ejector pin retaining plate and the 3rd ejector pin retaining plate together move upward, push rod, cone push rod and sprue puller are together followed and are moved upward, push rod promotes half slide structure and moves upward, simultaneously, two Houghs of each group half slide structure move laterally, the male thread portion of capping plug separates from thread forming chamber, and cone push rod promotes capping plug and moves upward, and sprue puller promotes the solidifying material of cast gate and moves upward; The first ejector pin retaining plate, the second ejector pin retaining plate and the 3rd ejector pin retaining plate are in the process of moving upward, swing hook outwards swings under the effect of skewed slot and guiding surface, when push rod moves to after certain stroke, the snap fit part of swing hook departs from the 3rd ejector pin retaining plate, now, the first ejector pin retaining plate and the second ejector pin retaining plate stop motion, the 3rd ejector pin retaining plate continues to move upward, and drives cone push rod to move upward capping plug is ejected;
(5), after capping plug is ejected, matched moulds, carries out injection mo(u)lding next time.
Above-mentioned injection mould and injection moulding process owing to being provided with half slide structure, and are provided with the thread forming chamber being formed by semicircle atrium in half slide structure, and like this, in injection molding process, the threaded portion of capping plug forms in thread forming chamber, simultaneously, owing to being provided with first, second, third ejector pin retaining plate, and utilize the first ejector pin retaining plate that push rod is fixed on the second ejector pin retaining plate, push rod is responsible for Hough upwards release and open to both sides, the threaded portion of being convenient to capping plug can be thrown off in thread forming chamber, and cone push rod and sprue puller are fixed on the 3rd ejector pin retaining plate, and described cone push rod is responsible for capping plug to release, sprue puller is responsible for solidifying runner material to release from conical cavity, thereby realizes the demoulding, in addition, utilize swing hook restoring board, swing hook, guide post, spring and flume structure, can make push rod start to eject time, push rod, cone push rod and sprue puller move simultaneously, when push rod moves to after certain stroke, be that the threaded portion of capping plug when can throw off from half slide structure, swing hook departs from the 3rd ejector pin retaining plate, now, the first ejector pin retaining plate and the second ejector pin retaining plate stop moving upward, the 3rd ejector pin retaining plate continues to move upward, and drive cone push rod and sprue puller that capping plug is ejected, utilize the Double-ejection can not only be smooth through the threaded portion of capping plug, in thread forming chamber, depart from reliably, and capping plug can be ejected smoothly.Therefore, injection mo(u)lding of the present invention does not need special injection machine, and mould structure is comparatively simple.
Further, front and back end, inclined-plane at accommodating cavity is respectively equipped with gathering sill, the front and back end of Hough is provided with the gib block that is placed in gathering sill, like this, in the time upwards ejecting half slide structure, under the guide effect of gib block and gathering sill, two Houghs of every group of half slide structure can naturally be opened, and make the demoulding more smooth.
Further, between two Houghs of every group of half slide structure, be provided with guide finger, this structure, when half slide structure is in opening procedure, utilize guide finger can ensure that two Houghs together move upward and open, so that keep two Houghs of every group of half slide structure in same level, simultaneously, the two Hough synchronous resets that also can make every group of half slide structure, can ensure formed precision next time.
Further; be positioned at the second through hole in the bottom of the 3rd ejector pin retaining plate and be fixed with push pedal, this push pedal can prevent from, on push rod direct effect to the three ejector pin retaining plates, having played the effect of protecting the 3rd ejector pin retaining plate; also be convenient to change push rod, reduce maintenance cost simultaneously.
Further, be fixed with wearing plate at the 3rd ejector pin retaining plate and snap fit contact position.In injection molding process, because the snap fit of swing hook can rub frequently with the 3rd ejector pin retaining plate, in the time being provided with wearing plate, can prevent that the 3rd ejector pin retaining plate is worn, and wearing plate is not easy to be worn, and the cost of replacing wearing plate can be low, therefore, not only improve the life-span of mould, and reduced maintenance cost.
Brief description of the drawings
Fig. 1 is the top view of capping plug injection mould.
Fig. 2 is A-A cutaway view in Fig. 1.
Fig. 3 is B-B cutaway view in Fig. 1.
Fig. 4 is D-D cutaway view in Fig. 1.
Fig. 5 be in Fig. 3 C to partial view.
Fig. 6 is the top view of Hough fixed head.
Fig. 7 is E-E cutaway view in Fig. 6.
Fig. 8 is the front view of Hough.
Fig. 9 is the top view of Hough.
Figure 10 is F-F cutaway view in Fig. 9.
Figure 11 is the structural representation of capping plug.
Figure 12 is the upward view of capping plug.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
As shown in Figure 11 and Figure 12, capping plug comprises capping plug body 100, and the cross section of capping plug body 100 is circular, has bottom-up blind hole 500 in capping plug body 100, is provided with the aperture 600 of four circle distribution that communicate with blind hole 500 at the top of capping plug body 100; Capping plug body 100 comprises upper cover cock body 200 and lower cover cock body 300, and the external diameter of lower cover cock body 300 is less than the external diameter of upper cover cock body 200, is provided with external screw thread 400 on the excircle of lower cover cock body 300.
As shown in Figure 1 to Figure 3, capping plug injection mould comprises counterdie seat board 1, two support foots 2, support plate 3, core fixing plate 4, Hough fixed head 5, small-sized core fixed head 6, upper clamping plate 7, half slide structure 8, small-sized core 8a, core 8b, gate bush 9, centring ring 10, guide pin bushing 11, guide pillar 12, the first ejector pin retaining plate 13, the second ejector pin retaining plate 14, the 3rd ejector pin retaining plate 15, push pedal 16, push rod 17, cone push rod 18, sprue puller 19, back-moving spring 20, swing hook restoring board 21, swing hook 22, guide post 23 and springs 24.
The middle part of counterdie seat board 1 is provided with and ejects hole 101.By bolt, counterdie seat board 1, support foot 2, support plate 3, core fixing plate 4, Hough fixed head 5 are linked together successively from bottom to top, between two support foots, be formed with storage tank 201.
As shown in Figure 6 and Figure 7, Hough fixed head 5 is provided with the accommodating cavity 501 of two up/down perforations, and wherein two opposite faces of accommodating cavity 501 are bottom-up outward extending inclined-plane 5011, are respectively equipped with gathering sill 5012 in the front and back end, inclined-plane of accommodating cavity; Be provided with up-small and down-big conical cavity 502 in the upper surface middle part of Hough fixed head 5.
Small-sized core fixed head 6 is bolted on the lower surface of upper clamping plate 7.The die cavity that is provided with moulding upper cover cock body profile at the lower surface of small-sized core fixed head 6, this die cavity is positioned at the top in thread forming chamber; Be provided with the runner 601 communicating with sprue and die cavity at the lower surface of small-sized core fixed head 6.The injection mould of this structure forms die joint between Hough fixed head 5 and small-sized core fixed head 6.
In the present embodiment, capping plug injection mould is mould four cavity configurations, once can four capping plugs of while moulding.As depicted in figs. 1 and 2, in each accommodating cavity, be provided with one group of half slide structure 8, described half slide structure is coordinated and is formed by two symmetrical Houghs 81, as shown in Fig. 8 to Figure 10, described Hough 81 comprise the hypotenuse 811 that coordinates with accommodating cavity inclined-plane and with hypotenuse relative straight flange 812, other two opposite ends are straight flange; Be provided with the gib block 813 coordinating with gathering sill 5012 in the rear and front end of hypotenuse 811; On the straight flange 812 of Hough, be provided with two semicircle atriums 814 of top-down, the inwall of semicircle atrium 814 is provided with screw thread, semicircle atrium corresponding to rear two Houghs of two Hough combinations that is positioned at same accommodating cavity forms thread forming chamber, in each group half slide structure, has two thread forming chambeies.On each Hough 81, be provided with horizontal pin-and-hole 815, between two Houghs of each group half slide structure, be provided with the guide finger that is installed to pin-and-hole 815.
In order to improve the intensity of small-sized core 8a, small-sized core 8a is ledge structure.The upper end of small-sized core 8a has boss, the boss of small-sized core is positioned at the stepped hole of small-sized core fixed head 6, and utilize upper clamping plate to keep out, prevent small-sized core axial-movement, the lower end of small-sized core 8a is passed small-sized core fixed head 6 and is extend in die cavity, and the inserting end of small-sized core 8a is for the aperture 600 of moulding capping plug.
Core 8b is fixed on core fixing plate 4, and the upper end of core 8b is through core fixing plate 4, half slide structure 8, thread forming chamber and stretch out half slide structure in die cavity, and core 8b is for the blind hole 500 of moulding capping plug.
The upper end of gate bush 9 has locating ring, and locating ring is arranged in upper clamping plate 7, and gate bush 9 passes upper clamping plate 7 and small-sized core fixed head 6 at the middle part of upper clamping plate, and gate bush 9 has sprue, and sprue communicates with runner.Centring ring 10 is enclosed within on locating ring, and centring ring 10 protrudes upper clamping plate 7, positions for the barrel to injection machine.
Guide pin bushing 11 is fixed on small-sized core fixed head 6, and utilizes that upper clamping plate 7 is spacing keeps out.Guide pillar 12 is fixed on core fixing plate 4 and extend in guide pin bushing 11 through Hough fixed head 5, and in the time that small-sized core fixed head 6 and upper clamping plate 7 move with respect to Hough fixed head 5, guide pin bushing 11 moves with respect to guide pillar 12, plays guide effect, makes kinematic accuracy high.
In storage tank 201, be provided with the first ejector pin retaining plate 13, the second ejector pin retaining plate 14 and the 3rd ejector pin retaining plate 15 from bottom to up, the first ejector pin retaining plate 13 is fixedly connected with the second ejector pin retaining plate 14, the middle part of the first ejector pin retaining plate 13 has the first through hole 131, the second ejector pin retaining plates 14 and is provided with the second through hole 141 communicating with the first through hole 131.Push pedal 16 is fixed by screws in the 3rd ejector pin retaining plate bottom that is positioned at the second through hole 141.Between the bottom of the first ejector pin retaining plate and counterdie seat board 1, be provided with supporting nail.
Each Hough correspondence is provided with at least two push rods.The upper end of push rod 17 contacts with Hough 81 with core fixing plate 4 through the second ejector pin retaining plate 14, the 3rd ejector pin retaining plate 15, support plate 3, and ejector pin retaining plate 13 is spacing keeps out by first in the lower end of push rod 17.On the 3rd ejector pin retaining plate 15, be fixed with cone push rod 18, the upper end of cone push rod 18 is up big and down small taper, the lower end of cone push rod is fixed on the 3rd ejector pin retaining plate 15 through core 8b, support plate 3, and in cone push rod, between the 3rd ejector pin retaining plate and support plate, cover has back-moving spring 20.On the 3rd ejector pin retaining plate 15, be fixed with through support plate 3, core fixing plate 4, Hough fixed head 5 sprue puller 19 corresponding to conical cavity 502, keep out by push pedal 16 is spacing the lower end of sprue puller 19.
At the fixing swing hook restoring board 21 in the two opposite sides of the first ejector pin retaining plate 13, swing hook fixed head 21 comprises the upwardly extending restoring board 212 of fixed part 211 and self-retaining portion outer end, fixed part 211 is fixed on the first ejector pin retaining plate 13, as shown in Figure 5, restoring board 212 is provided with kidney slot 2121, between restoring board 212 and the first ejector pin retaining plate 13, has space; The hinged inside that is positioned at restoring board 212 in the two opposite sides of the second ejector pin retaining plate 14 has swing hook 22, and the inner side, middle part of swing hook 22 is provided with the snap fit 221 that hooks the 3rd ejector pin retaining plate 15, and the inner side, upper end of swing hook 22 is provided with guiding surface 222; On support plate 3, be provided with the skewed slot 301 coordinating with guiding surface; On swing hook 22, be provided with the guide post 24 that extend into kidney slot, on guide post, between swing hook and restoring board, cover has spring 24.As shown in Figure 4, be fixed with wearing plate 25 at the 3rd ejector pin retaining plate and snap fit contact position.
The method of utilizing above-mentioned injection mould to carry out injection mo(u)lding to capping plug is.
(1) matched moulds, in matched moulds process, half slide structure resets 8 in accommodating cavity 501, and half slide structure 8, in reseting procedure, owing to being provided with guide finger, therefore, can ensure two Hough energy synchronous resets of one group of half slide structure, thus the Forming Quality after ensureing.Simultaneously, push rod 17, cone push rod 18, sprue puller 19 reset, the reset of push rod 17, cone push rod 18, sprue puller 19 pass through that matched moulds and back-moving spring realize, swing hook 22 resets under the effect of spring 24, and snap fit 221 holdings of swing hook 22 are on the wearing plate 25 of the 3rd ejector pin retaining plate.
(2) utilize injection machine to injecting material in the sprue of gate bush 9, the runner of material on sprue, the small-sized core fixed head of gate bush enters in moulding die cavity, and wherein moulding die cavity is made up of jointly die cavity, thread forming chamber, small-sized core, core.
(3) after injection moulding completes, cooling.
(4) die sinking ejects capping plug 100, and detailed process is: the push rod of injection machine is applied in push pedal 16 through ejecting hole 101, the first through hole 131, the second through hole 141.First die sinking, moves upward upper clamping plate 7, small-sized core fixed head 6, centring ring 10, gate bush 9, and small-sized core fixed head 6 separates with Hough fixed head 5, and the material that is positioned at sprue is thrown off from sprue, and upper cover cock body 200 is thrown off in die cavity, then, utilize push rod to give push pedal 16 thrust upwards, in the process that starts to eject at push rod, snap fit 221 holdings of swing hook 22 are on wearing plate 25, now, the first ejector pin retaining plate 13, the second ejector pin retaining plate 14 and the 3rd ejector pin retaining plate 15 together move upward, push rod 17, cone push rod 18 and sprue puller 19 are together followed and are moved upward, push rod promotes half slide structure 8 and moves upward along gathering sill, simultaneously, two Houghs of each group half slide structure move laterally, the male thread portion of capping plug separates from thread forming chamber, cone push rod 18 promotes capping plug 100 and moves upward, sprue puller 19 promotes the solidifying material of cast gate and moves upward and depart from conical cavity 502, the first ejector pin retaining plate 13, the second ejector pin retaining plate 14 and the 3rd ejector pin retaining plate 15 are in the process of moving upward, swing hook 22 outwards swings under the effect of skewed slot and guiding surface 222, when push rod moves to after certain stroke, snap fit 221 parts of swing hook depart from wearing plate 25, depart from the 3rd ejector pin retaining plate 15, now, the first ejector pin retaining plate 13 and the second ejector pin retaining plate 14 stop motions, the 3rd ejector pin retaining plate 15 continues to move upward, and drives cone push rod 18 to move upward capping plug is ejected.
(5), after capping plug 100 is ejected, matched moulds, carries out injection mo(u)lding next time.
The injection mould of present embodiment and injection moulding process owing to being provided with half slide structure, and are provided with the thread forming chamber being formed by semicircle atrium in half slide structure, and like this, in injection molding process, the threaded portion of capping plug forms in thread forming chamber, simultaneously, owing to being provided with first, second, third ejector pin retaining plate, and utilize the first ejector pin retaining plate that push rod is fixed on the second ejector pin retaining plate, push rod is responsible for Hough upwards release and open to both sides, the threaded portion of being convenient to capping plug can be thrown off in thread forming chamber, and cone push rod and sprue puller are fixed on the 3rd ejector pin retaining plate, and described cone push rod is responsible for capping plug to release, sprue puller is responsible for solidifying runner material to release from conical cavity, thereby realizes the demoulding, in addition, utilize swing hook restoring board, swing hook, guide post, spring and flume structure, can make push rod start to eject time, push rod, cone push rod and sprue puller move simultaneously, when push rod moves to after certain stroke, be that the threaded portion of capping plug when can throw off from half slide structure, swing hook departs from the 3rd ejector pin retaining plate, now, the first ejector pin retaining plate and the second ejector pin retaining plate stop moving upward, the 3rd ejector pin retaining plate continues to move upward, and drive cone push rod and sprue puller that capping plug is ejected, utilize the Double-ejection can not only be smooth through the threaded portion of capping plug, in thread forming chamber, depart from reliably, and capping plug can be ejected smoothly.Therefore, injection mo(u)lding of the present invention does not need special injection machine, and mould structure is comparatively simple.
Half slide structure is under the guide effect of gib block 813 and gathering sill 5011, and two Houghs of every group of half slide structure can naturally be opened, and makes the demoulding more smooth.And utilize guide finger can ensure that two Houghs together move upward and open, so that keep two Houghs of every group of half slide structure in same level, meanwhile, also can make two Hough synchronous resets of every group of half slide structure, can ensure formed precision next time.In addition, in injection molding process, because the snap fit of swing hook can rub frequently with the 3rd ejector pin retaining plate, in the time being provided with wearing plate, can prevent that the 3rd ejector pin retaining plate is worn, and wearing plate is not easy to be worn, and the cost of changing wearing plate can be low, therefore, not only improve the life-span of mould, and reduced maintenance cost.
Claims (10)
1. capping plug injection mould, comprises counterdie seat board, two support foots, support plate, core fixing plate, small-sized core fixed head, upper clamping plate, gate bush, centring ring, push rod, guide pin bushing and guide pillars; Counterdie seat board is provided with and ejects hole; The lower end of support foot is arranged on counterdie seat board, between two support foots, is formed with storage tank; Support plate is fixed on the upper end of support foot; Core fixing plate is fixed on support plate; Small-sized core fixed head is fixed on upper clamping plate; The lower end of gate bush extend in small-sized core fixed head through upper clamping plate; Centring ring is fixed on upper clamping plate and is enclosed within on gate bush upper end; Guide pin bushing is arranged on small-sized core fixed head, and the upper surface of guide pin bushing is kept out by upper clamping plate; It is characterized in that:
Between core fixing plate and small-sized core fixed head, be provided with Hough fixed head, Hough fixed head is provided with the accommodating cavity of two up/down perforations, and wherein two opposite faces of accommodating cavity are bottom-up outward extending inclined-plane; In accommodating cavity, be provided with one group of half slide structure, described half slide structure is coordinated and is formed by two symmetrical Houghs, and described Hough comprises the hypotenuse that coordinates with accommodating cavity inclined-plane and the relative straight flange with hypotenuse; On the straight flange of Hough, be provided with the semicircle atrium of top-down, the inwall of atrium is provided with screw thread, and opening corresponding to rear two Houghs of two Hough combinations that is positioned at same accommodating cavity forms thread forming chamber;
On core fixing plate, be fixed with upper end and pass and stretch out the core of half slide structure through thread forming chamber;
On small-sized core fixed head, be provided with the die cavity corresponding with position, thread forming chamber, on small-sized core fixed head, be provided with lower end and extend into the small-sized core in die cavity;
In storage tank, be provided with the first ejector pin retaining plate, the second ejector pin retaining plate and the 3rd ejector pin retaining plate from bottom to up, the first ejector pin retaining plate is fixedly connected with the second ejector pin retaining plate, the middle part of the first ejector pin retaining plate has the first through hole, and the second ejector pin retaining plate is provided with the second through hole communicating with the first through hole; The upper end of push rod contacts with Hough with core fixing plate through the second ejector pin retaining plate, the 3rd ejector pin retaining plate, support plate, and the lower end of push rod is kept out by the first ejector pin retaining plate; On the 3rd fixed head, be fixed with cone push rod, the upper end of cone push rod is up big and down small taper, the lower end of cone push rod is fixed on the 3rd ejector pin retaining plate through core, support plate, and in cone push rod, between the 3rd ejector pin retaining plate and support plate, cover has back-moving spring;
On Hough fixed head, be positioned at gate bush sprue below be provided with up-small and down-big conical cavity, on the 3rd ejector pin retaining plate, be fixed with through support plate, core fixing plate, Hough fixed head the sprue puller corresponding to conical cavity;
At the fixing swing hook restoring board in the two opposite sides of the first ejector pin retaining plate, swing hook fixed head comprises the upwardly extending restoring board of fixed part and self-retaining portion outer end, and restoring board is provided with kidney slot, between restoring board and the first ejector pin retaining plate, has space; The hinged inside that is positioned at restoring board in the two opposite sides of the second ejector pin retaining plate has swing hook, and the inner side, middle part of swing hook is provided with the snap fit that hooks the 3rd ejector pin retaining plate, and the inner side, upper end of swing hook is provided with guiding surface; On support plate, be provided with the skewed slot coordinating with guiding surface; On swing hook, be provided with the guide post that extend into kidney slot, on guide post, between swing hook and restoring board, cover has spring.
2. capping plug injection mould according to claim 1, is characterized in that: the front and back end, inclined-plane at accommodating cavity is respectively equipped with gathering sill, and the front and back end of Hough is provided with the gib block that is placed in gathering sill.
3. capping plug injection mould according to claim 1, is characterized in that: between two Houghs of every group of half slide structure, be provided with guide finger.
4. capping plug injection mould according to claim 1, is characterized in that: be positioned at the second through hole in the bottom of the 3rd ejector pin retaining plate and be fixed with push pedal.
5. capping plug injection mould according to claim 1, is characterized in that: be fixed with wearing plate at the 3rd ejector pin retaining plate and snap fit contact position.
6. a method of utilizing the injection mould described in claim 1 capping plug to be carried out to injection moulding, is characterized in that comprising the steps:
(1) matched moulds, in matched moulds process, half slide structure resets in accommodating cavity, and push rod, cone push rod, sprue puller reset, and swing hook resets under the effect of spring, and the snap fit holding of swing hook is on the 3rd ejector pin retaining plate;
(2) utilize injection machine to injecting material in gate bush, material enters in moulding die cavity through sprue, the runner of gate bush, and wherein moulding die cavity is made up of die cavity, thread forming chamber, small-sized core, core;
(3) after injection moulding completes, cooling;
(4) die sinking ejects capping plug, detailed process is: the push rod of injection machine is applied on the 3rd ejector pin retaining plate through the first through hole, the second through hole, die sinking, upper clamping plate, small-sized core fixed head, centring ring, gate bush are moved upward, small-sized core fixed head separates with Hough fixed head, the material that is positioned at sprue separates from sprue, and throw off in die cavity the upper end of capping plug; Push rod gives thrust upwards, in the process that starts to eject at push rod, the snap fit holding of swing hook is on the 3rd ejector pin retaining plate, now, the first ejector pin retaining plate, the second ejector pin retaining plate and the 3rd ejector pin retaining plate together move upward, push rod, cone push rod and sprue puller are together followed and are moved upward, push rod promotes half slide structure and moves upward, simultaneously, two Houghs of each group half slide structure move laterally, the male thread portion of capping plug separates from thread forming chamber, and cone push rod promotes capping plug and moves upward, and sprue puller promotes the solidifying material of cast gate and moves upward; The first ejector pin retaining plate, the second ejector pin retaining plate and the 3rd ejector pin retaining plate are in the process of moving upward, swing hook outwards swings under the effect of skewed slot and guiding surface, when push rod moves to after certain stroke, the snap fit part of swing hook departs from the 3rd ejector pin retaining plate, now, the first ejector pin retaining plate and the second ejector pin retaining plate stop motion, the 3rd ejector pin retaining plate continues to move upward, and drives cone push rod to move upward capping plug is ejected;
(5), after capping plug is ejected, matched moulds, carries out injection mo(u)lding next time.
7. the method for capping plug injection mould injection moulding capping plug according to claim 6, is characterized in that: the front and back end, inclined-plane at accommodating cavity is respectively equipped with gathering sill, and the front and back end of Hough is provided with the gib block that is placed in gathering sill.
8. the method for capping plug injection mould injection moulding capping plug according to claim 6, is characterized in that: between two Houghs of every group of half slide structure, be provided with guide finger.
9. the method for capping plug injection mould injection moulding capping plug according to claim 6: be positioned at the second through hole in the bottom of the 3rd ejector pin retaining plate and be fixed with push pedal.
10. the method for capping plug injection mould injection moulding capping plug according to claim 6: be fixed with wearing plate at the 3rd ejector pin retaining plate and snap fit contact position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410424120.4A CN104149279B (en) | 2014-08-27 | 2014-08-27 | Capping plug injection mould and capping plug injection moulding method |
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| CN201410424120.4A CN104149279B (en) | 2014-08-27 | 2014-08-27 | Capping plug injection mould and capping plug injection moulding method |
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| CN105216249A (en) * | 2015-09-25 | 2016-01-06 | 亚新科噪声与振动技术（安徽）有限公司 | A kind of pivot pin cover Automated mould |
| CN107984714A (en) * | 2017-12-05 | 2018-05-04 | 苏州联开精密模具有限公司 | A kind of new HALF blocks mold-opening structure |
| TWI656957B (en) * | 2016-03-10 | 2019-04-21 | 鑫永銓股份有限公司 | Combined mold for making case |
| CN111673984A (en) * | 2020-05-17 | 2020-09-18 | 宁波正佳模塑有限公司 | Mould of half push pipe demoulding mechanism with pipe joint end cover edge covering |
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