CN102241110B - Automatic hot-cutting side gate injection mold, and gate cutter and injection molding process thereof - Google Patents

Automatic hot-cutting side gate injection mold, and gate cutter and injection molding process thereof Download PDF

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Publication number
CN102241110B
CN102241110B CN201110127354.9A CN201110127354A CN102241110B CN 102241110 B CN102241110 B CN 102241110B CN 201110127354 A CN201110127354 A CN 201110127354A CN 102241110 B CN102241110 B CN 102241110B
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cast gate
thimble
fixed head
cutting knife
gate cutting
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CN102241110A (en
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何�雄
刘惠林
石磊
刘时元
刘安培
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DONGMING XINGYE SCIENCE TECHNOLOGY CO., LTD.
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BEIJING DONGMING XINGYE SCIENCE TECHNOLOGY Co Ltd
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Abstract

The invention relates to an injection mold, in particular to an automatic hot-cutting side gate injection mold. The injection mold comprises a front mold fixing plate, a front mold core, a front mold plate, a rear mold core, a rear mold plate which is used for fixing the rear mold core and a rear mold fixing plate which is provided with a pushing hole, wherein the front mold plate and the rear mold core are used for fixing the front mold core; a part cavity, a pouring channel and a gate are formed between the front mold core and the rear mold core; and a gate shearing device and a product push-out device are arranged below the rear mold plate. The injection mold is characterized in that: a material handle push-out device is arranged on the rear mold plate; the product push-out device is arranged between the rear mold plate and the rear mold fixing plate; the gate shearing device is arranged between the product push-out device and the rear mold fixing plate; and the material handle push-out device is arranged on the rear mold plate. The automatic hot-cutting side gate injection mold is suitable for producing injection molding products which have complicated shapes and strict appearance requirements; and residues do not exist at an incision, subsequent secondary machining is not required, the mold is not required to be maintained and welded, and a gate cutter has long service life.

Description

Automatic hot cutting sidegated injection mold, cast gate cutting knife used and Shooting Technique
Technical field
The present invention relates to a kind of injection mold, particularly a kind ofly be applicable to complex-shaped, appearance requirement is strict injection moulding and produce, and otch noresidue, the automatic hot cutting sidegated injection mold without follow-up secondary operations, the repair welding of mould Maintenance free, cast gate cutting knife long service life, cast gate cutting knife used and Shooting Technique.
Background technology
Most injection-moulded plastic part all enters glue two board molds with side to be produced, the advantage that side is entered glue be into glue evenly, little without swash, goods internal stress, but shortcoming is that rear processing is loaded down with trivial details, employment is many.Can solve again loaded down with trivial details secondary operations for solving in using side Jiao Kou, compression human cost problem, adopts cold cut automatically in mould more, and this mode can only be for the undemanding product of appearance requirement simple in structure.Its subject matter is that otch height differs, and has residual.Thereby further develop automatic hot cutting technique in mould.
The mould of automatic hot cutting side gate in a kind of mould as disclosed in the patent No. 200820235570.9, it comprises front core rod, for the front template of fixing described front core rod, rear core rod and for the rear pattern plate of fixing described rear core rod, described front core rod coordinates with rear core rod and is formed for 2 symmetrically arranged die cavitys of shaped article and the flow passage chamber for the molding runners mouth of a river, described die cavity and flow passage chamber junction offer side gate, described rear pattern plate below is provided with the liftout attachment for product and the runner mouth of a river are ejected, described side gate below is provided with a kerf push rod, described otch push rod is fixedly arranged on described liftout attachment.Described liftout attachment comprises ejector pin retaining plate, the push pedal being fixedly connected with a described ejector pin retaining plate, secondary ejector pin retaining plate, the secondary push pedal being fixedly connected with described secondary ejector pin retaining plate, described otch push rod is fixedly arranged on a described ejector pin retaining plate, is installed with some push rods for ejecting product and the runner mouth of a river on described secondary ejector pin retaining plate.Described push pedal below is provided with a rear mold seat board, is provided with somely for supporting the back-up block of a described push pedal between described rear mold seat board and a push pedal, by the back-up block of replacing differing heights, can regulate the ejection stroke of a push pedal.
When injection mold completes after injection moulding pressurize, the push rod of injector is the push pedal in pre-top first, drive ejector pin retaining plate and otch push rod to travel forward, the distance that ejects of otch push rod is L1, that is the distance L 1 of secondary push pedal and an ejector pin retaining plate, otch push rod cuts off the also side gate in high temperature; In the time that product is cooled to eject temperature, after front template separates with rear pattern plate, the push rod of injector continues a push pedal of ejection, and then the push rod promoting on secondary push pedal and secondary ejector pin retaining plate travels forward, and then push rod ejecting product and the runner mouth of a river.
This secondary pushing tow thermal cutting mould can automatically complete cast gate excision in mould.But cast gate cutting knife frequently contacts and causes edge of a knife damage with front core rod, causes incision of product burr, residual, and core rod needs frequent repair welding, and cast gate cutting knife also needs frequent replacing, has a strong impact on production efficiency; Even if reserved 0.1mm, prevents from hitting front mould, but also have the risk of otch push rod collision front mould, and in the time ejecting for the second time, do not cut off cast gate completely, cast gate place still has residual, out-of-flatness; Material handle and part eject simultaneously, need manual sorting to expect handle and part, are unfavorable for high-speed automated production.
As can be seen here, existing automatic hot cutting sidegated injection mold, in structure and use, obviously still has inconvenience and defect, and is urgently further improved.In order to solve the problem of above-mentioned existence, relevant unit there's no one who doesn't or isn't seeks solution painstakingly, is completed by development but have no for a long time applicable design always, and this is obviously the problem that the anxious wish of relevant dealer solves.Therefore how to found a kind ofly realize increasingly automated, to complete apperance requirement the part with complicated structure mould ingate shearing, otch noresidue, without follow-up secondary operations, mould without the automatic hot cutting sidegated injection mold of repair welding, cast gate cutting knife long service life, cast gate cutting knife used and Shooting Technique, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defect that above-mentioned existing automatic hot cutting sidegated injection mold exists, practical experience and the professional knowledge of the inventor based on being engaged in this type of product design manufacture and enriching for many years, and the utilization of cooperation scientific principle, actively research and innovation in addition, to founding a kind of new automatic hot cutting sidegated injection mold, cast gate cutting knife used and Shooting Technique.Through constantly research, design, and after repeatedly studying and improving, finally create the present invention who has practical value.
Summary of the invention
The object of the invention is to, the cast gate cut surface that overcomes existing automatic hot cutting sidegated injection mold existence has residual defect, and provide a kind of new automatic hot cutting sidegated injection mold, technical problem to be solved is to meet high-speed automated production, can complete the shearing of mould ingate, otch noresidue of apperance requirement the part with complicated structure, without follow-up secondary operations.
Of the present invention have an object to be, overcomes mould that existing automatic hot cutting sidegated injection mold exists and cast gate cutting knife because of collision, the defect that the life-span is not high, and provide a kind of cast gate cutting knife to improve mould and cast gate cutting knife service life.
A further object of the present invention is to provide a kind of part and expects and, the Shooting Technique of the automatic hot cutting sidegated injection mold of the difference demoulding, further to improve die automation degree, boosts productivity.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of automatic hot cutting sidegated injection mold proposing according to the present invention, comprise the front mould fixed head sequentially arranging, front core rod, the front template of fixing described front core rod, rear core rod, the rear pattern plate of fixing described rear core rod, there is the rear mold fixed head in pushing tow hole, between described front core rod and described rear core rod, form part die cavity, running channel and cast gate, described rear pattern plate below is provided with cast gate shear and product liftout attachment, wherein said rear pattern plate is provided with material liftout attachment, described product liftout attachment is located between described rear pattern plate and described rear mold fixed head, described cast gate shear is located between described product liftout attachment and described rear mold fixed head, described material is located at liftout attachment on described rear pattern plate.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid automatic hot cutting sidegated injection mold, wherein said be located at material on rear pattern plate liftout attachment comprise material eject gripper shoe, material eject pin, material return pin, material ejector spring, fixing described material eject pin and expect the material of plate return pin thimble fixed head and expect thimble guide plate; The another side of the corresponding part die cavity of described rear pattern plate is provided with material liftout attachment accommodating chamber, and described material is located at described material in liftout attachment accommodating chamber thimble fixed head and material thimble guide plate; Described material is fixed on described material on the rear pattern plate outside liftout attachment accommodating chamber ejecting gripper shoe, with by described material thimble fixed head and material the block of thimble guide plate in described material liftout attachment accommodating chamber in; Described material is expecting thimble fixed head described in the depth ratio of liftout attachment accommodating chamber and expecting large the gross thickness of thimble guide plate L1; The material that described rear core rod and described rear pattern plate are provided with perforation is eject pin slide opening and material plate return pin slide opening, and described material is slidedly arranged on plate return pin eject pin and described material respectively in described material eject pin slide opening and expects in plate return pin slide opening; When matched moulds, described material is front core rod described in the contact of plate return pin top, and to keep material thimble guide plate and described material to be had liftout attachment accommodating chamber bottom to the distance of L1, now described material is just positioned at the end of eject pin on the running channel face of described rear core rod; Described material is located at described material ejecting gripper shoe and described material thimble guide plate or expecting between thimble fixed head ejector spring.
Aforesaid automatic hot cutting sidegated injection mold, the wherein said product liftout attachment of being located between rear pattern plate and rear mold fixed head comprises: product thimble, product thimble fixed head, product thimble guide plate, product ejects return spring and product and ejects guide post and form, wherein said product thimble and product eject guide post and are gripped by described product thimble fixed head and product thimble guide plate, described rear pattern plate and material are provided with product thimble slide opening liftout attachment and product ejects guide post slide opening, describedly ejected by described product thimble fixed head and the fixing product thimble of product thimble guide plate and product that guide post is slidedly arranged on respectively described product thimble slide opening and product ejects in guide post slide opening, product ejects return spring and is sheathed on described product and ejects on guide post, top is pressed between described product thimble guide plate and rear pattern plate, when matched moulds, make between product thimble guide plate and rear pattern plate, to there is larger distance, and the end of described product thimble is just positioned in the forming surface of part die cavity of described rear core rod.
Aforesaid automatic hot cutting sidegated injection mold, wherein said cast gate shear comprises: cast gate cutting knife fixed head and the cast gate cutting knife fixed head back-moving spring of cast gate cutting knife pilot hole, cast gate cutting knife slide opening, cast gate cutting knife, fixing cast gate cutting knife, and described cast gate cutting knife fixed head and cast gate cutting knife fixed head back-moving spring are located in described cast gate shear accommodating chamber; Described cast gate cutting knife is provided with gate orifice, and described cast gate cutting knife pilot hole is located at the gate location of front core rod; Described cast gate cutting knife slide opening is located at the gate location of rear core rod, and coaxial with described cast gate cutting knife pilot hole, and connect described rear core rod, rear pattern plate, material thimble guide plate, material thimble fixed head, product thimble guide plate and product thimble fixed head; The described cast gate cutting knife being fixedly arranged on cast gate cutting knife fixed head is slidedly arranged in described cast gate cutting knife slide opening, and described cast gate cutting knife fixed head is between described product thimble fixed head and rear mold fixed head; Described cast gate cutting knife fixed head back-moving spring is located between described product thimble fixed head and described cast gate cutting knife fixed head; When matched moulds, described cast gate cutting knife fixed head rear fixed plate described in contact under the effect of cast gate cutting knife fixed head back-moving spring power, and and the spacing of possessing L2 between described product thimble fixed head, the top of described cast gate cutting knife is positioned at the cast gate cutting knife pilot hole of described front core rod, the gate location of core rod before and after gate orifice on described cast gate cutting knife is just positioned at, a part for formation cast gate.
The present invention also provides a kind of cast gate cutting knife for above-mentioned automatic hot cutting sidegated injection mold, described cast gate cutting knife is made up of lower end fixed part, middle guiding sliding part and upper end cutting part, and the edge of a knife of wherein said upper end cutting part is the annular edge of a knife around cast gate.
The cast gate cutting knife of aforementioned automatic hot cutting sidegated injection mold, the annular edge of a knife of the upper end cutting part of wherein said cast gate cutting knife is formed by being located at cone-shaped gate hole on the cutting part of described upper end and the side plane of being close to described part die cavity of upper end cutting part, the small end in described cone-shaped gate hole is close to the side of described part die cavity, and the large end in described cone-shaped gate hole connects described running channel.
The present invention also provides a kind of Shooting Technique for above-mentioned automatic hot cutting sidegated injection mold, comprising following steps:
A, mould closure, under the effect of return pin 83, drive material thimble enforcing return thimble guide plate in thimble fixed head and material in the material of thimble in fixing material at material, and material is the stroke L1 of thimble; When mould closure, the cast gate cutting knife of mould ingate shear inserts in the cast gate cutting knife pilot hole of front core rod;
B, injection moulding and pressurize;
C, hot cutting pouring gate, after injection moulding and pressurize, eject hot cutting pouring gate for the first time, forming machine push rod pushes the cast gate cutting knife fixed head of cast gate shear, eject for the first time, the described cast gate cutting knife fixed head drive cast gate cutting knife forward pilot hole of core rod moves, and stroke is L2 to the maximum;
D, cooling and shaping, enter cooling stage after cast gate cutting knife has moved;
E, eject material handle, after cooling and shaping completes, forming machine carries out die sinking action, material thimble fixed head material under the continuous action of ejector spring power by expect the guiding of return pin, travel forward, range L1, loosening material handle, will expect, taking out, to realize Double-ejection;
F, eject part, continue die sinking to opening completely, forming machine push rod continues to move ahead and promotes product thimble fixed head by cast gate cutting knife fixed head and continue to move ahead, and to ejection stroke terminal, product is ejected, and ejects action three times that realize mould;
G, thimble reset, and forming machine push rod retreats, and each telecontrol equipment is return under spring-force driven dual;
H, matched moulds enter next circulation.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, automatic hot cutting sidegated injection mold of the present invention and cast gate cutting knife used can reach suitable technological progress and practicality, and have the extensive value in industry, and it at least has following advantages:
1, in the cast gate shear of automatic hot cutting sidegated injection mold of the present invention, adopt the annular edge of a knife, cast gate is located in cast gate cutting knife, adopt earnestly, not only otch noresidue, without follow-up secondary operations, avoided the problem of the front core rod of the existing cast gate cutting knife collision of existing inscribe mould simultaneously, thereby greatly improve the service life of cast gate cutting knife and mould, reach cast gate cutting knife identical with die life, in use without changing cast gate cutting knife, enhance productivity, reduce maintenance cost, increase economic efficiency, in the practicality using and cost benefit, really meet industry development completely required, quite there is industrial utilization.
2, automatic hot cutting sidegated injection mold of the present invention, adopt three pushing tows to complete respectively cast gate cutting, the cast gate demoulding, the part demoulding, material is separately controlled ejection stroke and product ejection stroke, on the one hand in the next procedure without carrying out separate component and cast gate, has improved production automation degree; On the other hand, product ejection stroke can be strengthened, be more suitable for the accessible taking-up of the complex parts that thickness is larger.
3, automatic hot cutting sidegated injection mold of the present invention, whole cast gate shear embeds in mould completely, saves die cost, optimizing machining technology progress.
4, automatic hot cutting sidegated injection mold of the present invention be hollow out in original mould Shang Zuo mechanism to meet the action demand of mechanism, be applicable to the old mould transformation of property in batches.
5, the structure of automatic hot cutting sidegated injection mold of the present invention really has more technological progress than existing inscribe injection mould, and the architectural feature that it is unique and function are also far from existing inscribe mould and can compare, there is multinomial effect of enhancement, and progressive on possessing skills.
In sum, the automatic hot cutting sidegated injection mold of novelty of the present invention, cast gate cutting knife used and Shooting Technique have above-mentioned plurality of advantages and practical value, no matter all have larger improvement in its structure at method, device or function, there is technically significant progress, and produced handy and practical effect, and more existing inscribe injection mould has multinomial effect of enhancement, thus be more suitable for practicality, and there is the extensive value of industry, be really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of description, and for above and other object of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
Fig. 1 is the structure chart of automatic hot cutting sidegated injection mold of the present invention.
Fig. 2 is the structure chart of the cast gate cutting knife in automatic hot cutting sidegated injection mold of the present invention.
Detailed description of the invention
Technological means and effect of taking for reaching predetermined goal of the invention for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to the automatic hot cutting sidegated injection mold, cast gate cutting knife used and the Shooting Technique that propose according to the present invention, its detailed description of the invention, step, structure, feature and effect thereof, be described in detail as follows.
Refer to Fig. 1, shown in, a kind of automatic hot cutting sidegated injection mold of preferred embodiment of the present invention, comprise the front mould fixed head 1 sequentially arranging, front core rod 3, the front template 2 of fixing described front core rod 3, rear core rod 4, the rear pattern plate 5 of fixing described rear core rod 4, there is the rear mold fixed head 12 in pushing tow hole, between described front core rod 3 and described rear core rod 4, form part die cavity 17, running channel 18 and cast gate 19, described rear pattern plate 5 belows are provided with cast gate shear 6 and product liftout attachment 7, wherein said rear pattern plate 5 is provided with material liftout attachment 8, described product liftout attachment 7 is located between described rear pattern plate 5 and described rear mold fixed head 12, described cast gate shear 6 is located between described product liftout attachment 7 and described rear mold fixed head 12, described material is located at liftout attachment on described rear pattern plate 5.
Described be located at material on rear pattern plate 5 liftout attachment 8 comprise material eject gripper shoe 81, material eject pin 82, material return pin 83, material ejector spring 84, fixing described material eject pin 82 and expect the material of plate return pin 83 thimble fixed head 85 and expect thimble guide plate 86; The another side of the corresponding part die cavity 17 of described rear pattern plate is provided with material liftout attachment accommodating chamber 51, and described material is located at described material in liftout attachment accommodating chamber 51 thimble fixed head 85 and material thimble guide plate 86; Described material is fixed on described material on the rear pattern plate 5 outside liftout attachment accommodating chamber 51 ejecting gripper shoe 81, with by described material thimble fixed head 85 and material 86 block of thimble guide plate in described material liftout attachment accommodating chamber 51 in; Described material is expecting thimble fixed head described in the depth ratio of liftout attachment accommodating chamber 51 and expecting large the gross thickness of thimble guide plate L1, namely expect that liftout attachment is had to the displacement that is L1 to the maximum, with feed ejecting, in the present embodiment L1 be specifically of a size of 5mm; The material that described rear core rod 4 and described rear pattern plate 5 are provided with perforation is eject pin slide opening 87 and material plate return pin slide opening 88, and described material is slidedly arranged on plate return pin 83 eject pin 82 and described material respectively in described material eject pin slide opening 87 and expects in plate return pin slide opening 88; When matched moulds, described material is front core rod 3 described in plate return pin 83 top contacts, to keep material thimble guide plate and described material to be had liftout attachment accommodating chamber bottom to the distance of L1, now described material is just positioned at the end of eject pin 82 on the running channel face of described rear core rod 4; Described material is located at described material ejecting gripper shoe 81 and described material thimble guide plate 86 or expecting between thimble fixed head 85 ejector spring 84, in diagram specific embodiment, be the ejector spring locating hole that is provided with perforation on thimble fixed head 85 at material, described ejector spring 84 is located in the ejector spring locating hole of described perforation, and top pressure and described material are ejecting gripper shoe 81 and described material between thimble guide plate 86.Also can by be located at material ejector spring locating hole on thimble fixed head 85 for not connecting blind hole, described ejector spring 84 tops press and described material ejecting gripper shoe 81 and expecting between thimble fixed head 85.
The described product liftout attachment 7 of being located between rear pattern plate 5 and rear fixed plate 12 comprises: product thimble 71, product thimble fixed head 72, product thimble guide plate 73, product ejects return spring 74 and product and ejects guide post 75 and form, wherein said product thimble 71 and product eject guide post 75 and are gripped by described product thimble fixed head 72 and product thimble guide plate 73, described rear pattern plate 5 and material are provided with product thimble slide opening 76 liftout attachment 8 and product ejects guide post slide opening 77, describedly ejected by product thimble fixed head and the fixing product thimble 71 of product thimble guide plate and product that guide post 75 is slidedly arranged on respectively described product thimble slide opening 76 and product ejects in guide post slide opening 77, product ejects return spring 74 and is sheathed on described product and ejects on guide post 75, top is pressed between described product thimble guide plate 73 and rear pattern plate 5, when matched moulds, make to there is larger distance between product thimble guide plate 73 and rear pattern plate 5, and the end of described product thimble 71 is just positioned in the forming surface of part die cavity 17 of described rear core rod 4.
Described cast gate shear 6 comprises: cast gate cutting knife fixed head 64 and the cast gate cutting knife fixed head back-moving spring 65 of cast gate cutting knife pilot hole 61, cast gate cutting knife slide opening 62, cast gate cutting knife 63, fixing cast gate cutting knife, described cast gate cutting knife 63 is provided with gate orifice 631 (seeing Fig. 2), and described cast gate cutting knife pilot hole 61 is located at the gate location of front core rod 3; Described cast gate cutting knife slide opening 62 is located at the gate location of rear core rod 4, and coaxial with described cast gate cutting knife pilot hole 61, and connect described rear core rod 4, rear pattern plate 5, material thimble guide plate 86, expect thimble fixed head 85, product thimble guide plate 73 and product thimble fixed head 72; The described cast gate cutting knife 9 being fixedly arranged on cast gate cutting knife fixed head 64 is slidedly arranged in described cast gate cutting knife slide opening 62, and described cast gate cutting knife fixed head 64 is between described product thimble fixed head 72 and rear fixed plate 12; Described cast gate cutting knife fixed head back-moving spring 65 is located between described product thimble fixed head 72 and described cast gate cutting knife fixed head 64; It should be noted that the cast gate cutting knife fixed head shown in Fig. 1 is overall structure, specifically establish T-shaped hole at cast gate cutting knife fixed head 64, the fixed part of described cast gate cutting knife is made as T-shaped bar, cast gate cutting knife is inserted behind the T-shaped hole of cast gate cutting knife fixed head, hold out against again fixingly with screw, also can adopt with fixing material thimble or the identical structure of product thimble; When matched moulds, described cast gate cutting knife fixed head 64 rear fixed plate 12 described in contact under the elastic force effect of cast gate cutting knife fixed head back-moving spring 65, and and the spacing of possessing L2 between described product thimble fixed head 72, the top of described cast gate cutting knife 9 is positioned at the cast gate cutting knife pilot hole 61 of described front core rod 3, the gate location of core rod before and after gate orifice 91 on described cast gate cutting knife is just positioned at, a part for formation cast gate.
As shown in Figure 2, the present invention also provides a kind of cast gate cutting knife 63 for above-mentioned automatic hot cutting sidegated injection mold, described cast gate cutting knife 63 is made up of lower end fixed part 632, middle guiding sliding part 633 and upper end cutting part 634, and the edge of a knife of wherein said upper end cutting part 634 is the annular edge of a knife around cast gate.
The annular edge of a knife 635 of the upper end cutting part 634 of described cast gate cutting knife is formed with the side plane of being close to described part die cavity of upper end cutting part by the cone-shaped gate hole 31 of being located on the cutting part of described upper end, the small end in described cone-shaped gate hole 631 is close to the side of described part die cavity, and the large end in described cone-shaped gate hole connects described running channel.
The present invention also provides a kind of Shooting Technique for above-mentioned automatic hot cutting sidegated injection mold, comprises the following steps:
A, mould closure, under the effect of return pin 83, drive material that thimble 82 is forced to return thimble guide plate 86 in thimble fixed head 85 and material in the material of thimble 82 in fixing material at material, and material is the stroke L1 of thimble 82; The cast gate cutting knife 63 of mould ingate shear 6 inserts in the cast gate cutting knife pilot hole 61 of front core rod simultaneously;
B, injection moulding and pressurize;
C, hot cutting pouring gate, after injection moulding and pressurize, eject for the first time hot cutting pouring gate, forming machine push rod pushes the cast gate cutting knife fixed head 64 of cast gate shear 6, eject for the first time, described cast gate cutting knife fixed head 64 drive cast gate cutting knife forward the pilot hole 61 of core rod 3 move, stroke is L2 to the maximum, the faying face of annular edge of a knife cutting cast gate and part, makes to separate; And cast gate and running channel junction are bent.
D, cooling and shaping, enter cooling stage after cast gate cutting knife has moved;
E, eject material handle, after cooling and shaping completes, cast gate becomes material handle with the plastic shape-forming in running channel, forming machine carries out die sinking action, die sinking moment, thimble fixed head 85 is being expected under the continuous action of ejector spring 84 elastic force, by expecting the guiding of return pin, travel forward, range L1, material ejects material handle thimble, and the material handle that simultaneously makes to be embedded in cast gate cutting knife cone-shaped gate hole becomes flexible, until will expect, taking out, to realize Double-ejection;
F, eject part, continue die sinking to opening completely, forming machine push rod continues to move ahead and promotes product thimble fixed head 72 by cast gate cutting knife fixed head 64 and continue to move ahead, and to ejection stroke terminal, product is ejected, and ejects action three times that realize mould;
G, thimble reset, and forming machine push rod retreats, and each telecontrol equipment is return under spring-force driven dual;
H, matched moulds enter next circulation.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (7)

1. an automatic hot cutting sidegated injection mold, comprise the front shoe sequentially arranging, front core rod, the front template of fixing described front core rod, rear core rod, the rear pattern plate of fixing described rear core rod, there is the rear mold fixed head in pushing tow hole, between described front core rod and described rear core rod, form part die cavity, running channel and cast gate, described rear pattern plate below is provided with cast gate shear and product liftout attachment, it is characterized in that described rear pattern plate is provided with material liftout attachment, described product liftout attachment is located between described rear pattern plate and described rear mold fixed head, described cast gate shear is located between described product liftout attachment and described rear mold fixed head, described material is located at liftout attachment on described rear pattern plate,
Wherein, the another side of the corresponding part die cavity of described rear pattern plate is provided with material liftout attachment accommodating chamber; Described material comprises liftout attachment: material eject gripper shoe, material eject pin, fixing described material the material of eject pin thimble fixed head with expect thimble guide plate; Described material is located at described material in liftout attachment accommodating chamber thimble fixed head and material thimble guide plate; Described material is fixed on described material on the rear pattern plate outside liftout attachment accommodating chamber ejecting gripper shoe, with by described material thimble fixed head and material the block of thimble guide plate in described material liftout attachment accommodating chamber in; And described material is expecting thimble fixed head described in the depth ratio of liftout attachment accommodating chamber and expecting large the gross thickness of thimble guide plate;
Described cast gate shear comprises: cast gate cutting knife fixed head and the cast gate cutting knife fixed head back-moving spring of cast gate cutting knife pilot hole, cast gate cutting knife, fixing cast gate cutting knife; Described cast gate cutting knife is provided with gate orifice, and described cast gate cutting knife pilot hole is located at the gate location of front core rod; Described cast gate cutting knife fixed head is between described product liftout attachment and rear mold fixed head; Described cast gate cutting knife fixed head back-moving spring is located between described product liftout attachment and described cast gate cutting knife fixed head; When matched moulds, described cast gate cutting knife fixed head rear mold fixed head described in contact under the elastic force effect of cast gate cutting knife fixed head back-moving spring, and and possess spacing between the product thimble fixed head of described product liftout attachment, the top of described cast gate cutting knife is positioned at the cast gate cutting knife pilot hole of described front core rod, the gate location of core rod before and after gate orifice on described cast gate cutting knife is just positioned at, a part for formation cast gate.
2. automatic hot cutting sidegated injection mold according to claim 1, its feature also comprises liftout attachment in material return pin and expects ejector spring at the described material of being located on rear pattern plate; Described material is fixed on plate return pin material thimble fixed head and expects thimble guide plate; The material that described rear core rod and described rear pattern plate are provided with perforation is eject pin slide opening and material plate return pin slide opening, and described material is slidedly arranged on plate return pin eject pin and described material respectively in described material eject pin slide opening and expects in plate return pin slide opening; When matched moulds, described material is front core rod described in the contact of plate return pin top, and to keep material that thimble guide plate and described material are had to distance liftout attachment accommodating chamber bottom, now described material is just positioned at the end of eject pin on the running channel face of described rear core rod; Described material is located at described material ejecting gripper shoe and described material thimble guide plate or expecting between thimble fixed head ejector spring.
3. automatic hot cutting sidegated injection mold according to claim 1, its feature comprises at the described product liftout attachment of being located between rear pattern plate and rear mold fixed head: product thimble, product thimble fixed head, product thimble guide plate, product ejects return spring and product and ejects guide post and form, wherein said product thimble and product eject guide post and are gripped by described product thimble fixed head and product thimble guide plate, described rear pattern plate and material are provided with product thimble slide opening liftout attachment and product ejects guide post slide opening, describedly ejected by described product thimble fixed head and the fixing product thimble of product thimble guide plate and product that guide post is slidedly arranged on respectively described product thimble slide opening and product ejects in guide post slide opening, product ejects return spring and is sheathed on described product and ejects on guide post, top is pressed between described product thimble guide plate and rear pattern plate, when matched moulds, make to there is distance between product thimble guide plate and rear pattern plate, and the end of described product thimble is just positioned in the forming surface of part die cavity of described rear core rod.
4. automatic hot cutting sidegated injection mold according to claim 3, its feature also comprises at described cast gate shear: cast gate cutting knife slide opening, described cast gate cutting knife fixed head and cast gate cutting knife fixed head back-moving spring are located in described cast gate shear accommodating chamber; Described cast gate cutting knife slide opening is located at the gate location of rear core rod, and coaxial with described cast gate cutting knife pilot hole, and connect described rear core rod, rear pattern plate, material thimble guide plate, material thimble fixed head, product thimble guide plate and product thimble fixed head; The described cast gate cutting knife being fixedly arranged on cast gate cutting knife fixed head is slidedly arranged in described cast gate cutting knife slide opening, and described cast gate cutting knife fixed head is between described product thimble fixed head and rear mold fixed head; Described cast gate cutting knife fixed head back-moving spring is located between described product thimble fixed head and described cast gate cutting knife fixed head.
5. according to the automatic hot cutting sidegated injection mold described in arbitrary claim in claim 1 to 4, its feature is made up of lower end fixed part, middle guiding sliding part and upper end cutting part at described cast gate cutting knife, and the edge of a knife of described upper end cutting part is the annular edge of a knife around cast gate.
6. automatic hot cutting sidegated injection mold according to claim 5, its feature is formed by being located at cone-shaped gate hole on the cutting part of described upper end and the side plane of being close to described part die cavity of upper end cutting part at the annular edge of a knife of the upper end of described cast gate cutting knife cutting part, the small end in described cone-shaped gate hole is close to the side of described part die cavity, and the large end in described cone-shaped gate hole connects described running channel.
7. for according to a Shooting Technique for the automatic hot cutting sidegated injection mold described in the arbitrary claim of claim 1 to 6, it is characterized in that comprising the following steps:
A. mould closure, under the effect of return pin, drive material thimble enforcing return thimble guide plate in thimble fixed head and material in the material of thimble in fixing material at material, material is the stroke L1 of thimble, when L1 is matched moulds, material keeps thimble guide plate and material distance liftout attachment accommodating chamber bottom; When mould closure, the cast gate cutting knife of mould ingate shear inserts in the cast gate cutting knife pilot hole of front core rod;
B. injection moulding and pressurize;
C. hot cutting pouring gate, after injection moulding and pressurize, eject for the first time hot cutting pouring gate, forming machine push rod pushes the cast gate cutting knife fixed head of cast gate shear, eject for the first time, the described cast gate cutting knife fixed head drive cast gate cutting knife forward pilot hole of core rod moves, and stroke is L2 to the maximum, when L2 is matched moulds, the spacing of possessing between cast gate cutting knife fixed head and the product thimble fixed head of product liftout attachment;
D. cooling and shaping, enters cooling stage after cast gate cutting knife has moved;
E. eject material handle, after cooling and shaping completes, forming machine carries out die sinking action, material thimble fixed head material under the continuous action of ejector spring power by expect the guiding of return pin, travel forward, range L1, loosening material handle, will expect, taking out, to realize Double-ejection;
F. eject part, continue die sinking to opening completely, forming machine push rod continues to move ahead and continues to move ahead by cast gate cutting knife fixed head promotion product thimble fixed head, to ejection stroke terminal, product is ejected, and ejects action three times that realize mould;
G. thimble resets, and forming machine push rod retreats, and each telecontrol equipment is return under spring-force driven dual;
H. matched moulds enters next circulation.
CN201110127354.9A 2011-05-17 2011-05-17 Automatic hot-cutting side gate injection mold, and gate cutter and injection molding process thereof Active CN102241110B (en)

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CN102653124A (en) * 2012-05-24 2012-09-05 山西惠丰机械工业有限公司 Automatic cutting device of restrictive pouring gate of injection mold
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