CN115366352A

CN115366352A - Automatic demoulding mould for internal and external threads

Info

Publication number: CN115366352A
Application number: CN202210961839.6A
Authority: CN
Inventors: 王全喜
Original assignee: Wuhan Liansu Precision Die Co ltd
Current assignee: Wuhan Liansu Precision Die Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2022-11-22
Anticipated expiration: 2042-08-11
Also published as: CN115366352B

Abstract

The invention discloses an automatic internal and external thread demoulding mould, which comprises a fixed mould component and a movable mould component which can be mutually matched, and a cutting rotation-stopping mechanism and a thread-twisting mechanism which are used for demoulding a product; the compound die through cover half part and movable mould part earlier, so that two ha fu sliders merge and form the die cavity, later mould plastics, make the product shaping, then the die sinking, accomplish the external screw thread part drawing of patterns to the product after preliminary die sinking, the external cutting detent mechanism of rethread both sides cuts and splines the product, then the outside hank tooth mechanism of redriving, so that hank tooth mechanism drive movable mould core rotates, in order to realize that the hank tooth withdraws from, realize carrying out the drawing of patterns to the internal thread part of product, whole process full automation is operated, can effectively improve production efficiency, and reduce the defective rate of product.

Description

Automatic demoulding mould for internal and external threads

Technical Field

The invention relates to an injection mold, in particular to an automatic inner and outer thread demolding mold.

Background

Currently, injection molds are tools used in the plastic processing industry to match plastic molding machines to impart a complete configuration and precise dimensions to plastic articles. At present, internal injection mold to the screw member adopts threaded core to cast the shaping more, when the drawing of patterns, cut off the product through needing external cutter, and stop the rotatory core to the product and deviate from, but this type of mould can only semi-automatic production mode usually, and the position of stopping that exists the product easily is not enough, can also realize the mould inscribe when can not realizing the drawing of patterns of hank tooth, can't effectively improve the drawing of patterns efficiency of mould, influence the production progress, and semi-automatic mode makes the demoulding effect of product not good easily, the defective rate is higher.

Disclosure of Invention

The invention provides an internal and external thread automatic demoulding mould, which is externally provided with a rotation stopping positioning structure and compatible with mould internal cutting structure under the condition that the rotation stopping position of a product is insufficient, realizes full-automatic production of the product, can effectively improve the production efficiency, reduces the reject ratio of the product, and has important guiding significance for twisted tooth products and mould internal cutting realization.

The technical scheme of the invention is as follows:

an internal and external thread automatic demoulding mould comprises a fixed mould component and a movable mould component which can be mutually matched, and a cutting rotation-stopping mechanism and a thread twisting mechanism which are used for demoulding a product;

the fixed die component comprises a fixed die panel and a fixed die plate fixed at the bottom of the fixed die panel, the fixed die plate is provided with a mounting groove, two symmetrically arranged half sliders are arranged in the mounting groove, each half slider is provided with a half die cavity and a half die runner communicated with the half die cavity, internal threads are arranged on the inner side wall of the half die cavity, the half die cavities and the half die runners of the two half sliders are oppositely arranged, the two half sliders slide along a slider guide strip on one side of the mounting groove to enable the two half die cavities oppositely arranged to realize die assembly or die sinking, and the two half die runners oppositely arranged at the moment are combined to form a main runner for injection molding or separation stripping; the top of the fixed die panel is provided with a squirt nozzle communicated with the main channel, the bottom of the fixed die panel is fixed with a fixed die core, the fixed die core is arranged between two half die cavities in which the two half die sliders are oppositely arranged, the bottom of the fixed die panel is provided with a hand-rest pin, the hand-rest pin penetrates out of an inclined guide hole of the half die slider, and a fixed die spring is arranged in the inclined guide hole and sleeved on the hand-rest pin;

the movable mould part comprises a push plate, a movable mould plate, vertical plates and a base, wherein the vertical plates are respectively fixed on two sides of the base, a hollow installation space is formed between the two vertical plates, the tops of the two vertical plates are respectively fixedly connected with two sides of the bottom of the movable mould plate, the movable mould plate is provided with a floating structure, and the push plate is installed on the top of the movable mould plate through the floating structure; the movable mold core is provided with a movable mold core, the outer side of the inserting end of the movable mold core is provided with an external thread, the movable mold core penetrates through the movable mold plate through a bearing, the inserting end penetrates through a mold core sleeve fixed on the push plate and is provided with an inserting port to be matched and inserted with the fixed mold core, so that a mold cavity is formed when the two half mold cavities are matched, and the other end penetrates through the bottom of the movable mold plate and is arranged in the mounting space and sleeved with a first transmission gear; the push plate is provided with a needle supporting groove, and when the die is closed, the tail end of the needle supporting is inserted into the needle supporting groove so that the fixed die spring is compressed;

the cutting and rotation stopping mechanism comprises a cutting assembly and rotation stopping assemblies symmetrically arranged on two sides of the push plate, each rotation stopping assembly comprises a mounting plate, a hydraulic oil cylinder, a guide rail and a push block, the mounting plate is fixed on one side of the push plate, the hydraulic oil cylinders are mounted on the mounting plate and used for driving the push blocks to slide along the guide rails, the guide rails are arranged on the push plate, the fixed template is provided with a notch for accommodating the guide rails, the tail end of each push block is provided with a rotation stopping positioning port, the cutting assembly is arranged at the tail end of one push block of the rotation stopping assemblies and comprises a cutter holder fixed at the tail end of each push block and blades arranged on two sides of the cutter holder; after the mold is opened, the rotation stopping positioning openings of the two rotation stopping assemblies respectively perform rotation stopping and jacking on the product from two sides, and simultaneously, the blade cuts off the connection between the product and the sprue;

the thread twisting mechanism comprises a main transmission shaft and a hydraulic motor, the main rotation shaft is rotatably installed in the installation space, a second transmission gear is sleeved at the top of the main transmission shaft and meshed with the first transmission gear, a third transmission gear is sleeved at the bottom of the main transmission shaft and driven by an output gear of the hydraulic motor, and the hydraulic motor is installed on one side of the base.

The using process of the invention is as follows:

when the die is closed, the injection molding machine drives the fixed die plate to be close to the push plate downwards, the tail ends of the supporting pins of the two half sliders are inserted into the supporting pin grooves of the push plate, the two half sliders are gradually drawn towards the inner side of the mounting groove along the slider guide strip due to the action of the inclined supporting pins in the downward process of the fixed die plate, the fixed die spring is gradually compressed, the floating structure at the bottom of the push plate is also compressed, when the fixed die plate is completely attached to the push plate, the two half sliders are combined together, the corresponding half die cavities and half die runners in the two half sliders are combined to form a die cavity and a main runner, the fixed die core is synchronously inserted into the plug-in port of the movable die core, the two half sliders are placed in the die cavity to complete die closing, and then the injection molding machine performs injection molding on the main runner through the squirt nozzle so that the sol flows into the die cavity through the main runner to perform injection molding on the product; the inner side wall of the cavity of the half mold is provided with internal threads, and the outer side of the inserting end of the movable mold core is provided with external threads, so that the internal threads and the external threads are formed on the inner wall and the outer wall formed in the cavity after the mold closing is carried out, so that a product is injection molded into a threaded part with the internal threads and the external threads;

after the die assembly is completed, the die is opened, when the die is opened, the injection molding machine drives the fixed die plate to be separated upwards, the tail ends of the supporting pins arranged on the two half sliding blocks start to be separated from the supporting pin grooves of the push plate, in the upward process of the fixed die plate, the two half sliding blocks are pushed to be separated from each other gradually towards the outer side of the mounting groove along the sliding block guide strip due to the reset action of the fixed die spring, the floating structure at the bottom of the push plate is not compressed any more at this time, the push plate is also pushed to be ejected out slowly upwards to a product, when the half sliding blocks slide outwards to a limiting position, the supporting pins are completely separated from the supporting pin grooves at this time, meanwhile, the fixed die core is synchronously separated from the inserting port of the moving die core, the die opening is completed, and the external thread forming part of the product is demoulded; then the injection molding machine continues to drive the fixed mold plate to reset the fixed mold part;

after the die sinking is finished, cutting, stopping rotation and demolding are needed, when demolding is carried out, the hydraulic cylinders on the two sides are firstly driven, the two hydraulic cylinders respectively drive the two push blocks to approach to a product along the guide rails until the rotation stopping positioning openings at the tail ends of the two push blocks clamp the rotation stopping ribs on the two sides of the product, the hydraulic cylinders are stopped being driven, meanwhile, the blade at the tail end of the push block also cuts off the connection between the product and the pouring gate, and the product is stopped and pushed tightly while the product is cut off; then controlling a hydraulic motor through an injection molding machine, enabling the hydraulic motor to be in transmission with a third transmission gear through an output gear, further enabling a main transmission shaft to drive a first transmission gear to rotate through a second transmission gear, enabling a movable mold core to synchronously rotate, enabling the movable mold core to rotatably twist teeth relative to a product, enabling a push plate to float towards the axis direction of the movable mold core under the action of a floating structure at the same time of twisting teeth, further continuously jacking the bottom of the product, continuously rotating the movable mold core until the product is separated from the movable mold core, realizing demolding of an internal thread molding part of the product, and completing the demolding action of the twisting teeth, so that the product can be taken out;

after demolding is completed, the hydraulic oil cylinder is driven to reset the push block, and the hydraulic motor is also driven to rotate reversely to reset the movable mold core.

Further, the mold is also provided with an ejection mechanism, and the ejection mechanism comprises an ejector pin, an ejector pin panel, an ejector pin bottom plate, an ejector post, a return spring and a return guide post;

the thimble panels are fixed on the thimble base plate in a stacked manner, and the thimble base plate is arranged at the bottom of the mounting space; the bottom end of the back needle guide pillar is fixed on the thimble panel, and the top end of the back needle guide pillar sequentially and upwards movably penetrates through the movable template and the push plate through holes and is flush with the surface of the push plate; the return needle spring is arranged in the installation space and sleeved on the return needle guide post, one end of the return needle spring is connected with the ejector pin panel, and the other end of the return needle spring is connected with the bottom of the movable template; the bottom of the ejector pin is fixed on the ejector pin panel, and when the die is closed, the top of the ejector pin sequentially and movably penetrates out of the movable template upwards, and the push plate extends into the fixed template and corresponds to the cold burden well of the main runner; the top column is fixed at the bottom of the thimble bottom plate and is movably arranged in the through hole of the base.

After the product breaks away from the movable mould core, need carry out ejecting to the cold burden in the sprue, the knock-out pin is moved in the through-hole of base to the knock-out roll top of injection molding machine this moment, the knock-out pin is moved upwards in the through-hole of base, and then the ejector pin bottom plate of drive top is ejecting upwards, so that the thimble on the thimble panel upwards realizes ejecting to the cold burden well of sprue, the return spring is upwards compressed by the promotion of thimble panel this moment, after ejecting finishing, under the effect of return spring, the thimble panel resets downwards, and then makes the thimble accomplish and reset. After the spring is used for a long time, the elasticity of the spring can be changed, so that a gap of several millimeters exists between the thimble base plate and the base when the spring is reset, and at the moment, the top of the back needle guide pillar can be forced by hands to ensure that the back needle guide pillar pushes the thimble base plate to return to the place.

Furthermore, an ejection limiting column is fixed on the ejector pin panel. When the ejector pin is ejected upwards, the ejection limiting column is used for limiting the upward ejection height of the ejector pin so as to prevent the return spring from being compressed excessively, and meanwhile, the distance between the ejection limiting column and the bottom of the movable template is guaranteed to be larger than the distance for ejecting cold materials in the main flow passage by upward movement of the ejector pin so as to guarantee that the ejector pin can eject the cold materials smoothly.

Further, the mold is also provided with an air cooling mechanism, and the air cooling mechanism comprises an air pipe, a high-speed rotating air nozzle, a one-way mechanical air valve and an air valve contact block;

one end of the air pipe is communicated with an air source through the one-way mechanical air valve, the other end of the air pipe is connected with the high-speed rotating air faucet, the high-speed rotating air faucet is arranged in the installation space and is installed at the bottom of the movable mold core, an air passage is formed inside the movable mold core and is communicated with the high-speed rotating air faucet, the top of the air passage is communicated with the inserting port, the fixed mold core is inserted in the inserting port and forms a first circulation gap with the inserting port when the mold is closed, air outlet holes communicated with the first circulation gap are formed in two sides of the movable mold core, a second circulation gap is formed between the movable mold core and the mold core sleeve, the air outlet holes are communicated with the second circulation gap, a third circulation gap communicated with the outside is formed between the top of the movable mold plate and the bottom of the push plate, and the second circulation gap is communicated with the third circulation gap, so that air flow is discharged to the outside through the third circulation gap;

the one-way mechanical air valve is fixed on one side of the movable template, and the air valve touch block is fixed on one side of the fixed template and used for controlling the opening and closing of the one-way mechanical air valve in a contact mode.

When the product carries out the compound die and moulds plastics, need cool off the core, because the top of movable mould core and the end of cover half core adopt the grafting mode that deepens and increase the location, the cooling of make full use of cover half core takes away the heat of moulding plastics in-process movable mould core earlier, also can carry out quick cooling to movable mould core through cooling gas simultaneously, improves the cooling effect for the product shaping.

The specific cooling process is as follows:

when the compound die, the cover half core is pegged graft in the interface of movable mould core, constantly let in the cooling water to the cover half core through the pipeline and cool off, this moment is the cooling of make full use of cover half core earlier and takes away the heat of the in-process movable mould core of moulding plastics, and simultaneously, because the contact of pneumatic valve touch multitouch and one-way mechanical pneumatic valve during the compound die, the pneumatic valve is opened this moment, the trachea spouts into cooling gas through the air flue of high-speed rotatory air cock to the movable mould core, take away the heat of movable mould core fast, cooling gas continues to flow upwards in the interface along the air flue, flow to the venthole through first circulation clearance, and then accelerate to cool off the grafting part of cover half core and movable mould core, later gas flows to the second circulation clearance through the venthole, then flow to the third circulation clearance through the second circulation clearance, discharge to the external world through the third circulation clearance at last.

When the product is opened, the gas valve contact block is separated from the one-way mechanical gas valve, and the gas valve is closed and no gas is introduced for cooling. The invention realizes the functions of mold closing, ventilation, mold opening and air closing, and efficiently improves the cooling efficiency of the movable mold core during mold closing.

It should be noted that the fixed mold core, the half slide block, the push plate and the movable mold plate of the invention are all provided with circulating cooling pipelines communicated with the outside, which are common water cooling means used by those skilled in the art, belong to the known technology, and are not described herein. The gas mechanism is added to accelerate the cooling process and improve the cooling efficiency of the movable mold core.

Further, a silencing air groove is formed in the top of the movable template, the silencing air groove is in a rectangular pulse shape, when the movable template is closed, the floating structure is compressed, so that the push plate is attached to the top of the movable template, and at the moment, the silencing air groove forms a third circulation gap between the push plate and the movable template.

The cooling air inlet of the movable mold core is arranged at the tail part of the mold core and is connected by a high-speed rotating air nozzle, but the exhaust part of the third circulation gap cannot be connected by the air nozzle, so the invention mills a silencing air groove on the movable mold plate and processes the silencing air groove into a rectangular pulse-shaped groove which can slow down the air flow, thereby effectively buffering the high-speed air flow and the noise when the compressed air is exhausted and reducing the noise pollution of a workshop.

Further, the floating structure comprises a limiting equal-height screw and a floating spring, a spring groove and a limiting groove are arranged in the movable template, a through hole is formed between the spring groove and the limiting groove, the limiting end of the limiting equal-height screw is arranged in the limiting groove, the other end of the limiting equal-height screw penetrates through the limiting groove and is arranged in the spring groove, the top of the floating spring is fixedly connected with the bottom of the push plate, the floating spring is arranged in the spring groove and is sleeved on the limiting equal-height screw, one end of the floating spring is connected with the bottom of the push plate, and the other end of the floating spring is connected with the bottom of the spring groove.

When the die is closed, the fixed die plate presses the push plate downwards so that the push plate is attached to the movable die plate, and at the moment, the floating spring is compressed in the spring groove; when the mold is opened, the fixed mold plate does not compress the push plate any more, the push plate floats towards the axis direction of the movable mold core under the action of the floating spring due to the reset action of the floating spring, and the push plate does not float upwards due to the limiting action of the limiting groove on the limiting equal-height screws for limiting after floating for a certain distance. Because the core sleeve is fixed on the push plate, the core sleeve is upwards ejected relative to the movable mold core while the push plate floats, so that ejection force is applied to the bottom of a product to match the movable mold core to rotate and disengage, and the product can be quickly demoulded.

Furthermore, two the bottom of ha fu slider all is equipped with the drag hook, the hook face of going up the drag hook is the inclined plane, two the hook portion orientation of the last drag hook of ha fu slider sets up relatively, the top of movable mould board be fixed with go up the lower hook that the drag hook corresponds, the hook face of lower drag hook is the inclined plane, the hook groove has been seted up to the push pedal, the drag hook is arranged in down the hook inslot, during the compound die, go up the drag hook arrange in the hook inslot with lower hook colludes each other.

When the fixed die component and the movable die component are assembled, the two half sliding blocks approach to each other relatively under the action of the supporting pins and the sliding block guide bars to realize the assembly of the dies, and a fixed die spring in the half sliding blocks is in a compressed state at the moment; when the die is opened, in order to prevent the fixed die spring from being clamped and not being capable of popping and separating the two half sliding blocks, an upper draw hook is arranged at the bottom of the half sliding block and is in inclined plane hooking with a lower draw hook of the movable die plate, when the fixed die plate opens the die upwards, a synchronous upward force is exerted on the half sliding block, at the moment, due to the limiting effect of the lower draw hook on the upper draw hook, the two half sliding blocks start to slide and separate to the outer side of the mounting groove along the sliding block guide strip under the acting force of the lower draw hook while the half sliding block is slowly lifted upwards, and after the two half sliding blocks slide to the limiting position of the sliding block guide strip, the upper draw hook and the lower draw hook are unhooked, the die opening is completed, and the external thread forming part of the product realizes the die releasing.

Further, be equipped with three gear groove in the base, it is three output gear, fourth drive gear, third drive gear are installed through the bearing respectively in the gear groove, hydraulic motor's output shaft with output gear connects, output gear with fourth drive gear meshes, fourth drive gear with third drive gear meshes, the top of final drive shaft is installed through the bearing the bottom of movable mould board, the bottom of final drive shaft is pegged graft into through-hole the gear inslot with third drive gear is connected.

When needs carry out the hank tooth drawing of patterns, start hydraulic motor, hydraulic motor passes through output gear drive fourth drive gear and rotates, and then fourth drive gear drive third drive gear rotates to make final drive shaft synchronous rotation, then rotate through the first drive gear of second drive gear drive, make first drive gear drive movable mould core rotate, make the relative product of external screw thread at movable mould core top screw out downwards, in order to realize the hank tooth drawing of patterns. Because before the threading tooth is demolded, the two sides of the product are pushed tightly and locked to rotate through the locking positioning openings of the two locking assemblies so as to keep the product in a fixed state, the movable mold core can be stably driven by the hydraulic motor to rapidly rotate, the threading tooth is demolded, and the demolding efficiency can be effectively improved.

Furthermore, movable mold guide pillars are fixed at four corners of the movable mold plate, the movable mold guide pillars penetrate out of the push plate through heavy load linear bearings, and the fixed mold plate is provided with a fixed mold guide sleeve matched with the movable mold guide pillars.

The movable mould guide pillar plays a role in guiding and positioning, and when the mould is closed, the fixed mould guide sleeve and the movable mould guide pillar are inserted in an aligning mode, so that the fixed mould component and the movable mould component can be accurately closed. The invention changes the common guide sleeve of the push plate into a heavy-load linear bearing, so that the push plate can float towards the axis direction of the movable mold core with extremely small friction force when floating upwards under the acting force of the floating spring.

Furthermore, a travel switch is fixed on one side of the mounting plate, and a travel contact block matched with the travel switch is arranged on one side, close to the hydraulic oil cylinder, of the push block.

After demoulding, the hydraulic oil cylinder drives the push block to slide and return along the guide rail, and when the stroke contact block is contacted with the stroke switch, the hydraulic oil cylinder stops driving the push block to slide so that the push block can be accurately reset and can be started again when cutting is stopped for next time.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the fixed die plate and the movable die plate are firstly closed to combine the two half sliders to form a cavity, then injection molding is carried out to mold a product, then the die is opened again, the external thread part of the product is demolded after initial die opening, the product is cut and stopped by the external cutting rotation stopping mechanisms at two sides, and then the external thread twisting mechanism is driven to drive the movable die core to rotate so as to realize the withdrawal of the twisted thread, so that the demoulding of the internal thread part of the product is realized, the full-automatic operation in the whole process can effectively improve the production efficiency and reduce the fraction defective of the product.

The length of the internal thread of a common product is not matched with the length of the stop rotation bit, and the length of the internal thread required by an internal thread forming die is 1-2mm longer than the length of the stop rotation bit, so that the die adopts an external stop rotation and die internal cutting integrated design, can realize the simultaneous consideration of die internal cutting and stop rotation, and saves resources.

Drawings

FIG. 1 is a schematic structural view of an automatic internal and external thread stripping die according to the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view B-B of FIG. 2;

FIG. 5 is an enlarged schematic view of portion C of FIG. 3;

FIG. 6 is an enlarged schematic view of portion D of FIG. 5;

FIG. 7 is a schematic structural view of a stationary mold part;

FIG. 8 is a schematic view of the stationary mold part with one of the half slides removed;

FIG. 9 is a schematic structural view of a movable mold part;

FIG. 10 is a schematic view of the movable mold part with the push plate and cut detent removed;

FIG. 11 is a schematic bottom view of the movable platen;

FIG. 12 is a schematic view of the movable mold part with the upper portion of the movable mold plate removed.

In the figure: the device comprises a fixed die panel 1, a fixed die plate 2, a half-die runner 302, a slider guide bar 4, a main runner 5, a sprue 6, a fixed die core 7, a holding pin 8, a fixed die spring 9, a push plate 10, a movable die plate 11, a vertical plate 12, a base 13, a movable die core 14, a die core sleeve 15, a first transmission gear 16, a holding pin groove 17, a mounting plate 18, a hydraulic oil cylinder 19, a guide rail 20, a push block 21, a rotation stop positioning port 22, a tool apron 23, a blade 24, a product 25, a main transmission shaft 26, a hydraulic motor 27, a second transmission gear 28, a third transmission gear 29, an output gear 30, a thimble 31, a thimble panel 32, a thimble bottom plate 33, a thimble 34, a thimble spring 35, a thimble guide post 36, an ejection limiting post 37, a limiting screw 38, a floating spring 39, a fourth transmission gear 40, a movable die guide post 41, a fixed die guide sleeve 42, a stroke switch 43, a stroke contact block 44, an air pipe 45, a high-speed rotation air nozzle 46, a one-way mechanical air valve 47, an air valve contact block 48, an air valve 49, a first flow gap 50, an air outlet hole 51, a second flow gap 52, a lower flow gap 53, a drag hook flow through air gap 53 and a drag hook groove 53.

The arrows in fig. 5 and 6 indicate the gas flow direction.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

Example 1:

as shown in fig. 1 to 12, the internal and external thread automatic demoulding mould of the embodiment comprises a fixed mould part and a movable mould part which can be mutually matched, and a cutting rotation-stopping mechanism and a thread twisting mechanism for demoulding a product;

the fixed die component comprises a fixed die panel 1 and a fixed die plate 2 fixed at the bottom of the fixed die panel 1, the fixed die plate 2 is provided with a mounting groove, two symmetrically-arranged half sliders 3 are arranged in the mounting groove, each half slider 3 is provided with a half die cavity 301 and a half die runner 302 communicated with the half die cavity 301, internal threads are arranged on the inner side wall of the half die cavity 301, the half die cavities 301 and the half die runners 302 of the two half sliders 3 are oppositely arranged, the two half sliders 3 slide along a slider guide strip 4 on one side of the mounting groove to enable the two half die cavities 301 oppositely arranged to realize die assembly or die assembly, and the two half die runners 302 oppositely arranged at the moment are combined to form a main runner 5 for injection molding or separation stripping; the top of the fixed die panel 1 is provided with a squirt nozzle 6 communicated with the main runner 5, the bottom of the fixed die panel is fixed with a fixed die core 7, the fixed die core 7 is arranged between two half die cavities 301 which are oppositely arranged by two half sliders 3, the bottom of the fixed die panel 1 is provided with a supporting pin 8, the supporting pin 8 penetrates out of an inclined guide hole of the half slider 3, and a fixed die spring 9 is arranged in the inclined guide hole and is sleeved on the supporting pin 8;

the movable mould part comprises a push plate 10, a movable mould plate 11, vertical plates 12 and a base 13, wherein the vertical plates 12 are respectively fixed on two sides of the base 13, a hollow installation space is formed between the two vertical plates 12, the tops of the two vertical plates 12 are respectively fixedly connected with two sides of the bottom of the movable mould plate 11, the movable mould plate 11 is provided with a floating structure, and the push plate 10 is installed on the top of the movable mould plate 11 through the floating structure; the movable mold core 14 is arranged on the movable mold plate 11, external threads are arranged on the outer side of the inserting end of the movable mold core 14, the movable mold core 14 penetrates through the movable mold plate 11 through a bearing installation, the inserting end penetrates through a mold core sleeve 15 fixed on the push plate 10 and is provided with an inserting port to be matched and inserted with the fixed mold core 7, so that a mold cavity is formed when the two half mold cavities 301 are matched, and the other end penetrates through the bottom of the movable mold plate 11 and is arranged in an installation space and sleeved with a first transmission gear 16; the push plate 10 is provided with a needle supporting groove 17, and when the die is closed, the tail end of the needle supporting 8 is inserted into the needle supporting groove 17 so that the fixed die spring 9 is compressed;

the cutting rotation stopping mechanism comprises a cutting assembly and rotation stopping assemblies symmetrically arranged at two sides of the push plate 10, each rotation stopping assembly comprises a mounting plate 18, a hydraulic oil cylinder 19, a guide rail 20 and a push block 21, the mounting plate 18 is fixed at one side of the push plate 10, the hydraulic oil cylinders 19 are mounted on the mounting plates 18 and are used for driving the push blocks 21 to slide along the guide rails 20, the guide rails 20 are arranged on the push plate 10, a notch used for accommodating the guide rails 20 is formed in the fixed template 2, a rotation stopping positioning port 22 is formed in the tail end of each push block 21, the cutting assembly is arranged at the tail end of each push block 21 of one rotation stopping assembly, and each cutting assembly comprises a cutter holder 23 fixed at the tail end of each push block 21 and blades 24 arranged at two sides of the cutter holder 23; after the mold is opened, the rotation stopping positioning openings 22 of the two rotation stopping assemblies respectively perform rotation stopping jacking on the product 25 from two sides, and simultaneously, the blade 24 cuts off the connection between the product 25 and a sprue;

the thread twisting mechanism comprises a main transmission shaft 26 and a hydraulic motor 27, wherein the main rotation shaft 26 is rotatably installed in the installation space, a second transmission gear 28 is sleeved on the top of the main transmission shaft 26 and meshed with the first transmission gear 16, a third transmission gear 29 is sleeved on the bottom of the main transmission shaft and is in transmission with an output gear 30 of the hydraulic motor 27, and the hydraulic motor 27 is installed on one side of the base 13.

The use process of the mold of the embodiment is as follows:

when the die is closed, the injection molding machine drives the fixed die plate 2 to be close to the push plate 10 downwards, the tail ends of the supporting pins 8 arranged on the two half sliders 3 are inserted into the supporting pin groove 17 of the push plate 10, in the downward process of the fixed die plate 2, due to the action of the inclined supporting pins 8, the two half sliders 3 gradually approach to the inner side of the installation groove along the slider guide strip 4, the fixed die spring 9 is gradually compressed, meanwhile, the floating structure at the bottom of the push plate 10 is also compressed, when the fixed die plate 2 is completely attached to the push plate 10, the two half sliders 3 are combined together, the corresponding half die cavities 301 and the half die runners 302 in the two half sliders 3 are combined to form a die cavity and a main runner 5, at the moment, the fixed die core 7 is synchronously inserted into the plug-in of the die core moving die 14, the two are arranged in the die cavity to complete die closing, then the injection molding machine performs injection molding on the main runner 5 through the squirt mouth 6, so that the sol flows into the die cavity through the main runner 5, and the product 25 is injection molded; because the inner side wall of the semi-mold cavity 301 is provided with internal threads and the outer side of the inserting end of the movable mold core 14 is provided with external threads, internal and external threads are formed on the inner and outer walls formed in the cavity after mold closing is carried out, so that the product 25 is injection molded into a threaded part with the internal and external threads;

after the die assembly is completed, the die opening is needed, when the die opening is performed, the injection molding machine drives the fixed die plate 2 to be separated upwards, the tail ends of the supporting pins 8 arranged on the two half sliders 3 start to be separated from the supporting pin grooves 17 of the push plate 10 at the moment, in the upward process of the fixed die plate 2, due to the reset action of the fixed die spring 9, the two half sliders 3 are pushed to gradually separate from each other along the slider guide strip 4 towards the outer side of the mounting groove, at the moment, the floating structure at the bottom of the push plate 10 is not compressed any more, the push plate 10 is also pushed to slowly eject the product 25 upwards, when the half sliders 3 slide outwards to a limiting position, the supporting pins 8 are completely separated from the supporting pin grooves 17, meanwhile, the fixed die core 7 is synchronously separated from the inserting port of the movable die core 14, the die opening is completed, and the external thread forming part of the product 25 is demoulded; then the injection molding machine continues to drive the fixed mold plate 2 to reset the fixed mold part;

after the die sinking is finished, cutting, stopping and demoulding are needed, when demoulding is carried out, the hydraulic oil cylinders 19 on the two sides are firstly driven, the two hydraulic oil cylinders 19 respectively drive the two push blocks 21 to approach the product 25 along the guide rails 20 until the stopping and rotating positioning holes 22 at the tail ends of the two push blocks 21 clamp stopping and rotating ribs on the two sides of the product 25, the hydraulic oil cylinders 19 are stopped being driven, meanwhile, the blade 24 at the tail ends of the push blocks 21 also cuts off the connection between the product 25 and a pouring gate, and the product 25 is stopped and pushed tightly when the product 25 is cut off; then controlling a hydraulic motor 27 through an injection molding machine, so that the hydraulic motor 27 is driven by an output gear 30 and a third transmission gear 29, further a main transmission shaft 26 drives a first transmission gear 16 to rotate through a second transmission gear 28, the movable mold core 14 synchronously rotates, the movable mold core 14 rotates and twists teeth relative to the product 25, simultaneously, a push plate 10 floats towards the axis direction of the movable mold core 14 under the action of a floating structure, the bottom of the product 25 is further pushed tightly continuously, the movable mold core 14 continues to rotate until the product 25 is separated from the movable mold core 14, the internal thread forming part of the product 25 realizes demolding, the teeth twisting demolding action is completed, and the product 25 can be taken out;

after the completion of the mold release, the hydraulic cylinder 19 is driven to reset the push block 21, and the hydraulic motor 27 is also reversely rotated to reset the movable mold core 14.

In this embodiment, each half-mold cavity 301 is provided for each half-mold block 3, two fixed mold cores 7 and two movable mold cores 14 are correspondingly provided in the mold, two cavities are formed in the mold after the mold closing, and two products 25 can be injection molded in the two cavities, so that the mold realizes one-out-of-two. Meanwhile, in order to enable the two half sliding blocks 3 to be more stable when the die assembly or die opening is carried out, the two sides of the half sliding blocks 3 slide through the sliding block guide strips 4, and the two sides are provided with the supporting pins 8 in a distributed mode, so that the die assembly is more stable when the supporting pins 8 are inserted.

In the embodiment, in order to make the guide rails 20 of the rotation stopping components on the two sides fit tightly during mold clamping, notches are formed at corresponding positions of the fixed mold plate 2 to accommodate the guide rails 20, so that uneven mold clamping is avoided. Similarly, on the premise of not affecting the execution process of the mold, in the present embodiment, for the placement positions of some components, some notches may be purposefully opened on the corresponding plates for receiving according to the mold clamping requirement, which is conventional for those skilled in the art, and will not be described here.

Referring to fig. 3 and 12, in the present embodiment, the mold is further provided with an ejection mechanism, which includes an ejector pin 31, an ejector pin panel 32, an ejector pin bottom plate 33, an ejector pin 34, a needle return spring 35, and a needle return guide post 36;

the thimble panel 32 is fixed on the thimble base plate 33 in a stacking manner, the thimble base plate 33 is arranged at the bottom of the installation space, and the thimble base plate 33 and the thimble panel 32 have the same size and can move in the installation space without obstruction; the bottom end of the back needle guide post 36 is fixed on the ejector pin panel 32, and the top end of the back needle guide post is sequentially and upwardly moved through the movable template 11 and the push plate 10 through the through hole and is flush with the surface of the push plate 10; the needle return spring 35 is arranged in the installation space and sleeved on the needle return guide post 36, one end of the needle return spring 35 is connected with the thimble panel 32, and the other end of the needle return spring is connected with the bottom of the movable mould plate 11; the bottom of the thimble 31 is fixed on a thimble panel 32, and when the mold is closed, the top of the thimble 31 sequentially and movably penetrates through the movable mold plate 11 upwards, and the push plate 10 extends into the fixed mold plate 2 to correspond to the cold material well of the main runner 5; the top pillar 34 is fixed at the bottom of the top needle base plate 33 and movably disposed in the through hole of the base 13.

After the product 25 is separated from the moving die core 14, the cold charge in the main runner 5 needs to be ejected, at this time, the ejector pin 34 is ejected by the ejector roller of the injection molding machine, the ejector pin 34 is ejected upwards in the through hole of the base 13, and then the ejector pin bottom plate 33 at the top is driven to eject upwards, so that the ejector pin 31 on the ejector pin panel 32 upwards ejects the cold charge well of the main runner 5, at this time, the needle return spring 34 is pushed upwards by the ejector pin panel 32 to be compressed, after the ejection is completed, under the action of the needle return spring 34, the ejector pin panel 32 resets downwards, and further the ejector pin 31 completes the reset. After the spring is used for a long time, the elasticity of the spring changes, so that a gap of several millimeters may exist between the thimble base plate 33 and the base 13 during resetting, and at this time, the top of the return pin guide post 36 can be forced by hands to ensure that the return pin guide post 36 pushes the thimble base plate 33 to return to the position.

Wherein, the ejector pin panel 32 is fixed with an ejection limiting column 37. When the thimble 31 is ejected upwards, the ejection limiting column 37 is used for limiting the upward ejection height of the thimble 31 so as to prevent the return spring 34 from being excessively compressed, and meanwhile, the distance between the ejection limiting column 37 and the bottom of the movable template 11 is ensured to be greater than the distance for ejecting the cold charge of the main runner 5 by the upward movement of the thimble 31 so as to ensure that the thimble 31 can eject the cold charge smoothly.

Referring to fig. 3, in the present embodiment, the floating structure includes a limit equal-height screw 38 and a floating spring 39, a spring groove and a limit groove are provided in the movable mold plate 11, a through hole exists between the spring groove and the limit groove, a limit end of the limit equal-height screw 38 is disposed in the limit groove, the other end of the limit equal-height screw penetrates through the limit groove and is disposed in the spring groove, the top of the floating spring is fixedly connected with the bottom of the push plate 10, the floating spring 39 is disposed in the spring groove and is sleeved on the limit equal-height screw 38, one end of the floating spring 39 is connected with the bottom of the push plate 10, and the other end of the floating spring 39 is connected with the bottom of the spring groove.

When the die is closed, the fixed die plate 2 presses the push plate 10 downwards to enable the push plate 10 to be attached to the movable die plate 11, and at the moment, the floating spring 39 is compressed in the spring groove; when the mold is opened, the fixed mold plate 2 does not compress the push plate 10 any more, due to the reset action of the floating spring 39, the push plate 10 floats towards the axis direction of the movable mold core 14 under the action of the floating spring 39, and after the push plate 10 floats for a certain distance, due to the limiting action of the limiting groove on the limiting equal-height screws 38, the push plate 10 does not float upwards any more. Because the core sleeve 15 is fixed on the push plate 10, the core sleeve 15 is also ejected upwards relative to the movable mold core 14 while the push plate 10 floats, so that ejection force is applied to the bottom of the product 25 to match the movable mold core 14 to rotate and disengage, and the product 25 can be quickly demolded.

Referring to fig. 4, in the present embodiment, three gear grooves are provided in the base 13, an output gear 30, a fourth transmission gear 40, and a third transmission gear 29 are respectively installed in the three gear grooves through bearings, an output shaft of the hydraulic motor 27 is connected with the output gear 30, the output gear 30 is engaged with the fourth transmission gear 40, the fourth transmission gear 40 is engaged with the third transmission gear 29, the top of the main transmission shaft 26 is installed at the bottom of the movable die plate 11 through a bearing, and the bottom of the main transmission shaft 26 is inserted into the gear grooves through a through hole and connected with the third transmission gear 29.

When the threading and demolding are required, the hydraulic motor 27 is started, the hydraulic motor 27 drives the fourth transmission gear 40 to rotate through the output gear 30, the fourth transmission gear 40 drives the third transmission gear 29 to rotate, so that the main transmission shaft 26 synchronously rotates, then the first transmission gear 16 is driven to rotate through the second transmission gear 28, the first transmission gear 16 drives the movable mold core 14 to rotate, and the external thread on the top of the movable mold core 14 is screwed out downwards relative to the product 25, so that the threading and demolding are realized. Before the threading die-stripping, the two sides of the product 25 are pushed tightly and stopped rotating through the rotation stopping positioning openings 22 of the two rotation stopping assemblies so as to keep the product 25 in a fixed state, so that the movable die core 14 can be stably driven by the hydraulic motor 27 to carry out the rapid rotation threading die-stripping, and the die-stripping efficiency can be effectively improved.

Referring to fig. 3, 7 and 9, in this embodiment, a movable mold guide post 41 is fixed at four corners of the movable mold plate 11, the movable mold guide post 41 passes through the push plate 10 through a heavy load linear bearing, and the fixed mold plate 2 is provided with a fixed mold guide sleeve 42 adapted to the movable mold guide post 41.

The movable mold guide post 41 plays a role in guiding and positioning, and when the mold closing is carried out, the fixed mold guide sleeve 42 is inserted into the movable mold guide post 41 in an aligning manner, so that the fixed mold component and the movable mold component can be accurately closed. The invention changes the common guide sleeve of the push plate 10 into a heavy load linear bearing, so that the push plate 10 can float towards the axial center direction of the movable mold core 14 with extremely small friction force when floating upwards under the action force of the floating spring 39.

Referring to fig. 1, in the present embodiment, a travel switch 43 is fixed to one side of the mounting plate 18, and a travel contact 44 matched with the travel switch 43 is arranged on one side of the push block 21 close to the hydraulic oil cylinder 19. After demolding is finished, the hydraulic oil cylinder 19 drives the push block 21 to perform sliding return stroke along the guide rail 20, and when the stroke contact block 44 is in contact with the stroke switch 43, the hydraulic oil cylinder 19 stops driving the push block 21 to perform sliding so that the push block 21 can be accurately reset and can be started again when the next cutting is stopped.

According to the invention, the fixed die plate 2 and the movable die plate 11 are firstly closed to combine the two half sliders 3 to form a cavity, then injection molding is carried out to mold the product 25, then the die is opened again, the external thread part of the product 25 is demolded after initial die opening, then the product 25 is cut and stopped by the external cutting rotation stopping mechanisms at two sides, and then the external thread twisting mechanism is driven to drive the movable die core 14 to rotate, so that the thread is withdrawn, the demolding of the internal thread part of the product 25 is realized, the whole process is fully-automatically operated, the production efficiency can be effectively improved, and the reject ratio of the product is reduced.

The length of the internal thread of the common product 25 is not matched with the length of the rotation stopping bit, and the length of the internal thread required by the internal thread forming die is 1-2mm longer than the length of the rotation stopping bit, so that the die disclosed by the invention adopts an external rotation stopping and die internal cutting integrated design, can realize the simultaneous consideration of die internal cutting and rotation stopping, and saves resources.

Example 2:

referring to fig. 1, fig. 3, fig. 5 and fig. 6, this embodiment is similar to embodiment 1, except that in this embodiment, the mold is further provided with an air cooling mechanism, the air cooling mechanism includes an air tube 45, a high-speed rotation air nozzle 46, a one-way mechanical air valve 47, and an air valve contact block 48;

one end of an air pipe 45 is communicated with an air source through a one-way mechanical air valve 47, the other end of the air pipe is connected with a high-speed rotation air nozzle 46, the high-speed rotation air nozzle 46 is arranged in an installation space and is installed at the bottom of the movable mold core 14, an air passage 49 formed inside the movable mold core 14 is communicated with the high-speed rotation air nozzle 46, the top of the air passage 49 is directly communicated into the plug-in port, when the mold is closed, the fixed mold core 7 is plugged in the plug-in port, a first circulation gap 50 is formed between the fixed mold core 7 and the plug-in port, air outlet holes 51 communicated with the second circulation gap 52 are formed in two sides of the movable mold core 14, a second circulation gap 52 is formed between the movable mold core 14 and the mold core sleeve 15, the air outlet holes 51 are communicated with the second circulation gap 52, a third circulation gap 53 communicated with the outside is formed between the top of the movable mold plate 11 and the bottom of the push plate 10, and the second circulation gap 52 is communicated with the third circulation gap 53, so that air flow is discharged to the outside through the third circulation gap 53;

the one-way mechanical air valve 47 is fixed on one side of the movable template 11, and the air valve contact block 48 is fixed on one side of the fixed template 2 and used for controlling the opening and closing of the one-way mechanical air valve 47 in a contact mode.

When product 25 carries out the compound die and moulds plastics, need cool off the core, because the top of movable mould core 14 and the end of cover half core 7 adopt the grafting mode that deepens and increase the location, the cooling of make full use of cover half core 7 is earlier taken away the heat of moulding plastics in-process movable mould core 14, also can carry out quick cooling to movable mould core 14 through cooling gas simultaneously, improves the cooling effect for the product shaping.

The specific cooling process is as follows:

when the die is closed, the fixed die core 7 is inserted into the insertion port of the moving die core 14, cooling water is continuously introduced into the fixed die core 7 through a pipeline for cooling, at the moment, the cooling of the fixed die core 7 is fully utilized to take away heat of the moving die core 14 in the injection molding process, meanwhile, because the air valve contact block 48 is in contact with the one-way mechanical air valve 47 during die closing, the air valve is opened, the air pipe 45 sprays cooling air into an air passage 49 of the moving die core 14 through the high-speed rotating air nozzle 46 to quickly take away the heat of the moving die core 14, the cooling air continuously flows upwards into the insertion port along the air passage 49 and flows to the air outlet 51 through the first circulation gap 50, so that the cooling of the insertion part of the fixed die core 7 and the moving die core 14 is accelerated, then the air flows to the second circulation gap 52 through the air outlet 51, then flows to the third circulation gap 53 through the second circulation gap 52, and finally is discharged to the outside through the third circulation gap 53.

When the product 25 is opened, the gas valve contact block 48 is separated from the one-way mechanical gas valve 47, and at the moment, the gas valve is closed, and gas is not introduced for cooling. The invention realizes the functions of mold closing and ventilation, mold opening and air closing, and effectively improves the cooling efficiency of the movable mold core 14 during mold closing.

It should be noted that the fixed mold core 7, the half slide 3, the push plate 10 and the movable mold plate 11 of the present invention are all provided with a circulating cooling pipeline (not shown) communicated with the outside, which is a common water cooling means used by those skilled in the art, and belongs to the known technology, and the description thereof is omitted. While the gas cooling is performed, the components of the present invention are uniformly cooled by passing through a circulating cooling duct, and the gas mechanism is added to accelerate the cooling process and improve the cooling efficiency of the moving mold core 14.

Referring to fig. 3, 6 and 10, in the present embodiment, a noise reduction air groove 54 is formed at the top of the movable die plate 11, the noise reduction air groove 54 is in a rectangular pulse shape, and when the die is closed, the floating structure is compressed to make the push plate 10 closely contact with the top of the movable die plate 11, and at this time, the noise reduction air groove 54 forms a third flow gap 53 between the push plate 10 and the movable die plate 11.

The cooling air inlet of the movable mold core 14 is arranged at the tail part of the mold core and is connected by the high-speed rotating air nozzle 46, but the exhaust part of the third flowing gap 53 can not be connected by the air nozzle, so the invention mills the silencing air groove 54 on the movable mold plate and processes the silencing air groove into the rectangular pulse-shaped groove which can slow down the air flow, thereby effectively buffering the high-speed air flow and the noise when the compressed air is exhausted and reducing the noise pollution of workshops.

Example 3:

referring to fig. 4, 7 and 10, the present embodiment is similar to embodiment 1, and the difference is that in the present embodiment, the bottom portions of the two half sliders 3 are both provided with an upper hook 55, the hook surface of the upper hook 55 is an inclined surface, the hook portions of the upper hooks 55 of the two half sliders 3 face to be disposed oppositely, the top portion of the movable die plate 11 is fixed with a lower hook 56 corresponding to the upper hook 55, the hook surface of the lower hook 56 is an inclined surface, the push plate 10 is provided with a hook groove 57, the lower hook 56 is disposed in the hook groove 57, and when die assembly is performed, the upper hook 55 is disposed in the hook groove 57 and is hooked with the lower hook 56.

When the fixed die component and the movable die component are matched, the two half sliding blocks 3 approach to each other under the action of the supporting pins 8 and the sliding block guide strips 4 to realize matching, and a fixed die spring 9 in the half sliding blocks 3 is in a compressed state; when the mold is opened, in order to prevent the fixed mold spring 9 from being clamped and being incapable of popping and separating the two half sliders 3, an upper draw hook 55 is arranged at the bottom of the half slider 3 and is in inclined plane hooking with a lower draw hook 56 of the movable mold plate 11, when the fixed mold plate 2 opens the mold upwards, a synchronous upward force is exerted on the half slider 3, at the moment, due to the limiting effect of the lower draw hook 56 on the upper draw hook 55, the two half sliders 3 start to slide and separate along the slider guide strip 4 to the outer side of the installation groove under the action of the lower draw hook 56 while the half slider 3 is slowly lifted upwards, and after the two half sliders slide to the limiting position of the slider guide strip 4, the upper draw hook 55 and the lower draw hook 56 are unhooked, the mold opening is completed, and the external thread forming part of the product 25 is demolded.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An internal and external thread automatic demoulding mould is characterized by comprising a fixed mould component and a movable mould component which can be mutually matched, and a cutting rotation-stopping mechanism and a thread-twisting mechanism which are used for demoulding a product;

the fixed die component comprises a fixed die panel (1) and a fixed die plate (2) fixed at the bottom of the fixed die panel (1), wherein the fixed die plate (2) is provided with a mounting groove, two symmetrically-arranged half sliders (3) are arranged in the mounting groove, each of the two half sliders (3) is provided with a half die cavity (301) and a half die runner (302) communicated with the half die cavity (301), the inner side wall of each half die cavity (301) is provided with an internal thread, the half die cavities (301) and the half die runners (302) of the two half sliders (3) are oppositely arranged, the two half sliders (3) slide along a slider guide strip (4) on one side of the mounting groove to enable the two oppositely-arranged half die cavities (301) to realize die assembly or die opening, and the two half die runners (302) oppositely arranged at the moment are combined to form a main runner (5) or separate and strip materials; the top of the fixed die panel (1) is provided with a sprue bush (6) communicated with the main flow channel (5), the bottom of the fixed die panel is fixedly provided with a fixed die core (7), the fixed die core (7) is arranged between two half die cavities (301) in which the two half die sliders (3) are oppositely arranged, the bottom of the fixed die panel (1) is provided with a supporting needle (8), the supporting needle (8) penetrates through an inclined guide hole of the half die slider (3), and a fixed die spring (9) is arranged in the inclined guide hole and sleeved on the supporting needle (8);

the movable mould part comprises a push plate (10), a movable mould plate (11), vertical plates (12) and a base (13), the vertical plates (12) are respectively fixed on two sides of the base (13), a hollow installation space is formed between the two vertical plates (12), the tops of the two vertical plates (12) are respectively fixedly connected with two sides of the bottom of the movable mould plate (11), the movable mould plate (11) is provided with a floating structure, and the push plate (10) is installed on the top of the movable mould plate (11) through the floating structure; the movable die plate (11) is provided with a movable die core (14), the outer side of the inserting end of the movable die core (14) is provided with an external thread, the movable die core (14) penetrates through the movable die plate (11) through a bearing installation, the inserting end penetrates through a die core sleeve (15) fixed on the push plate (10) and is provided with an inserting port to be matched and inserted with the fixed die core (7), so that a die cavity is formed when the two half die cavities (301) are matched, and the other end penetrates through the bottom of the movable die plate (11) to be arranged in the installation space and is sleeved with a first transmission gear (16); the push plate (10) is provided with a needle supporting groove (17), and when the die is closed, the tail end of the needle supporting (8) is inserted into the needle supporting groove (17) so that the fixed die spring (9) is compressed;

the cutting rotation stopping mechanism comprises a cutting assembly and rotation stopping assemblies symmetrically arranged on two sides of the push plate (10); the rotation stopping assembly comprises a mounting plate (18), a hydraulic oil cylinder (19), a guide rail (20) and a push block (21), the mounting plate (18) is fixed on one side of the push plate (10), the hydraulic oil cylinder (19) is mounted on the mounting plate (18) and used for driving the push block (21) to slide along the guide rail (20), the guide rail (20) is arranged on the push plate (10), a notch used for accommodating the guide rail (20) is formed in the fixed template (2), and a rotation stopping positioning port (22) is formed in the tail end of the push block (21); the cutting assembly is arranged at the tail end of a push block (21) of one of the rotation stopping assemblies and comprises a cutter holder (23) fixed at the tail end of the push block (21) and blades (24) arranged on two sides of the cutter holder (23); after the mold is opened, the rotation stopping positioning openings (22) of the two rotation stopping assemblies respectively perform rotation stopping and jacking on a product (25) from two sides, and simultaneously, a blade (24) is used for cutting off the connection between the product (25) and a pouring gate;

the thread twisting mechanism comprises a main transmission shaft (26) and a hydraulic motor (27), wherein the main transmission shaft (14) is rotatably installed in the installation space, a second transmission gear (28) is sleeved at the top of the main transmission shaft (26) and meshed with the first transmission gear (16), a third transmission gear (29) is sleeved at the bottom of the main transmission shaft and is in transmission with an output gear (30) of the hydraulic motor (27), and the hydraulic motor (27) is installed on one side of the base (13).

2. The automatic demolding die for internal and external threads as claimed in claim 1, wherein the die is further provided with an ejection mechanism, the ejection mechanism comprises an ejector pin (31), an ejector pin panel (32), an ejector pin bottom plate (33), an ejector post (34), a needle return spring (35) and a needle return guide post (36);

the thimble panel (32) is fixed on the thimble base plate (33) in a laminated manner, and the thimble base plate (33) is arranged at the bottom of the installation space; the bottom end of the back needle guide post (36) is fixed on the ejector pin panel (32), and the top end of the back needle guide post sequentially and upwards passes through the movable template (11) and the push plate (10) through a through hole and is flush with the surface of the push plate (10); the needle returning spring (35) is arranged in the installation space and sleeved on the needle returning guide post (36), one end of the needle returning spring (35) is connected with the ejector pin panel (32), and the other end of the needle returning spring is connected with the bottom of the movable template (11); the bottom of the ejector pin (31) is fixed on the ejector pin panel (32), and when the die is closed, the top of the ejector pin (31) sequentially and movably penetrates through the movable die plate (11) upwards, and the push plate (10) extends into the fixed die plate (2) to correspond to a cold material well of the main runner (5); the ejector column (34) is fixed at the bottom of the ejector pin base plate (33) and movably arranged in the through hole of the base (13).

3. The automatic demolding die for internal and external threads as claimed in claim 2, wherein the ejector pin panel (32) is fixed with an ejection limiting column (37).

4. The automatic internal and external thread demoulding mould according to claim 1, wherein the mould is further provided with an air cooling mechanism, the air cooling mechanism comprises an air pipe (45), a high-speed rotation air nozzle (46), a one-way mechanical air valve (47) and an air valve contact block (48);

one end of the air pipe (45) is communicated with an air source through the one-way mechanical air valve (47), the other end of the air pipe is connected with the high-speed rotating air nozzle (46), the high-speed rotating air nozzle (46) is arranged in the installation space and is installed at the bottom of the movable mold core (14), an air passage (49) formed inside the movable mold core (14) is communicated with the high-speed rotating air nozzle (46), the top of the air passage (49) is communicated into the plug-in port, during mold closing, the fixed mold core (7) is plugged in the plug-in port and forms a first circulation gap (50) with the plug-in port, air outlet holes (51) communicated with the first circulation gap (50) are formed in two sides of the movable mold core (14), a second circulation gap (52) is formed between the movable mold core (14) and the mold core sleeve (15), the air outlet holes (51) are communicated with the second circulation gap (52), a third circulation gap (53) communicated with the outside is formed between the top of the movable mold plate (11) and the bottom of the push plate (10), and the second circulation gap (53) is communicated with the third circulation gap (53) through the third circulation gap (53);

the one-way mechanical air valve (47) is fixed on one side of the movable template (11), and the air valve touch block (48) is fixed on one side of the fixed template (2) and used for controlling the opening and closing of the one-way mechanical air valve (47) in a contact mode.

5. The automatic internal and external thread demoulding mould according to claim 4, wherein the top of the movable mould plate (11) is provided with a silencing air groove (54), the silencing air groove (54) is in a rectangular pulse shape, when the mould is closed, the floating structure is compressed to enable the push plate (10) to be attached to the top of the movable mould plate (11), and the silencing air groove (54) forms the third circulation gap (53) between the push plate (10) and the movable mould plate (11).

6. The automatic inner and outer thread demoulding mold according to claim 1, wherein the floating structure comprises a limit equal-height screw (38) and a floating spring (39), a spring groove and a limit groove are arranged in the movable mold plate (11), a through hole is arranged between the spring groove and the limit groove, a limit end of the limit equal-height screw (38) is arranged in the limit groove, the other end of the limit equal-height screw penetrates through the limit groove through the through hole and is arranged in the spring groove, the top of the limit equal-height screw is fixedly connected with the bottom of the push plate (10), the floating spring (39) is arranged in the spring groove and is sleeved on the limit equal-height screw (38), one end of the floating spring (39) is connected with the bottom of the push plate (10), and the other end of the floating spring is connected with the bottom of the spring groove.

7. The automatic inner and outer thread demolding die as claimed in claim 1, wherein upper draw hooks (55) are arranged at the bottoms of the two half sliding blocks (3), the hooking surfaces of the upper draw hooks (55) are inclined surfaces, the hook portions of the upper draw hooks (55) of the two half sliding blocks (3) face to be arranged oppositely, lower draw hooks (56) corresponding to the upper draw hooks (55) are fixed to the top of the movable die plate (11), the hooking surfaces of the lower draw hooks (56) are inclined surfaces, a draw hook groove (57) is formed in the push plate (10), the lower draw hooks (56) are arranged in the draw hook groove (57), and during die assembly, the upper draw hooks (55) are arranged in the draw hook groove (57) and are hooked with the lower draw hooks (56) mutually.

8. The automatic inner and outer thread demoulding mould according to claim 1, wherein three gear grooves are formed in the base (13), an output gear (30), a fourth transmission gear (40) and a third transmission gear (29) are respectively installed in the three gear grooves through bearings, an output shaft of the hydraulic motor (27) is connected with the output gear (30), the output gear (30) is meshed with the fourth transmission gear (40), the fourth transmission gear (40) is meshed with the third transmission gear (29), the top of the main transmission shaft (26) is installed at the bottom of the movable mould plate (11) through a bearing, and the bottom of the main transmission shaft (26) is inserted into the gear grooves through holes and is connected with the third transmission gear (29).

9. The automatic internal and external thread demoulding mould according to claim 1, wherein the four corners of the movable mould plate (11) are fixed with movable mould guide posts (41), the movable mould guide posts (41) penetrate out of the push plate (10) through heavy load linear bearings, and the fixed mould plate (2) is provided with a fixed mould guide sleeve (42) matched with the movable mould guide posts (41).

10. The automatic internal and external thread demoulding mould as claimed in claim 1, wherein a travel switch (43) is fixed on one side of the mounting plate (18), and a travel contact block (44) matched with the travel switch (43) is arranged on one side of the push block (21) close to the hydraulic oil cylinder (19).