CN111331791A

CN111331791A - Mould for long cylindric piece of moulding of rotatable core

Info

Publication number: CN111331791A
Application number: CN202010213634.0A
Authority: CN
Inventors: 陈曼华; 罗卫平
Original assignee: Jinling Institute of Technology
Current assignee: Hubei Wensheng Mould Products Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-06-26
Anticipated expiration: 2040-03-24
Also published as: CN111331791B

Abstract

The application discloses a piece mould is moulded to long cylindric of rotatable core, this mould be a core rotatable mould, and the piece is moulded to specially adapted long cylindric, and the die sinking distance and the shaping cycle of mould when can reducing the piece drawing of patterns are moulded to long cylindric. This mould design core is for can following the circular arc line and carrying out pivoted part, the core rotates preset position when the compound die, core and cover half bedplate and fixed die plate make up into a complete cover half part, begin to mould plastics after the compound die, the cooling of the completion after moulding plastics, the cooling is accomplished the back die sinking, the die sinking distance of cover half part and movable mould part only need surpass mould length with safe distance can, then mechanical device through self rotates certain angle with the core along the pitch arc, mould in the mould die cavity alright release smoothly from inside, drop in the mould collecting box of below. The design mould can effectively shorten the die sinking stroke, reduces the requirement that the mould needs to lengthen the die sinking stroke to the injection molding equipment, saves the occupied space of the equipment, and improves the efficiency of the equipment.

Description

Mould for long cylindric piece of moulding of rotatable core

Technical Field

The invention relates to the field of mold manufacturing and use, in particular to a mold for a long cylindrical plastic part, which needs a rotatable core for processing the long cylindrical plastic part.

Background

The long cylindrical plastic part is frequently required to be produced in the production of the plastic part, when a corresponding mold is designed, the distance between mold opening and model taking is large due to the existing mold, a guide rail is required for the operation of the mold, the space occupied by equipment is large indirectly due to the fact that the guide rail is long, and the total time for processing the plastic part is long due to the long-distance mold opening and closing. Therefore, whether a mold can be designed or not is considered, when the injection molding long cylindrical model is manufactured, the mold does not need to be opened and closed for a long distance, the rapid production of the model is guaranteed, and equipment does not need to occupy a large space.

Disclosure of Invention

To solve the above existing problems. The invention provides a mold for a long cylindrical plastic part with a rotatable core, and aims to solve the problems that a large mold opening distance is generated when a long cylindrical plastic part is processed by a conventional mold, equipment occupies a large space, and the production time is long. The design is a long cylindric of rotatable core moulds the piece and does not need the mould to open longer distance when mould die sinking takes out to mould the piece, practices thrift the total time of injection moulding processing, improves mechanical efficiency, for reaching this purpose:

the invention provides a mold for a long cylindrical plastic part with a rotatable core, which comprises a fixed mold base plate, a core rotating plate, a fixed mold plate, a sprue bush, a core, a guide rod, a cylindrical pin, a transverse rod pressure spring, a right rotating rod, a left rotating rod, a transverse rod slider, a transverse rod, a connecting rod, a vertical rod pressure spring, a vertical rod slider, a rocker arm slider, a movable mold, a reset rod, a push plate and a push pin plate, wherein the rotatable core rotating plate is arranged on the fixed mold base plate, the core and the guide rod are arranged on the core rotating plate, the middle part of the core rotating plate is provided with the sprue bush for injection molding, one side of the core rotating plate is fixedly provided with the rocker arm, the core rotating plate is positioned between the fixed mold base plate and the fixed mold plate through a convex shoulder and can rotate, the fixed mold base plate and the fixed mold, the rotating reset device is fixedly arranged on one side of the fixed die base plate and consists of a cylindrical pin, a cross rod pressure spring, a right rotating rod, a left rotating rod, a cross rod sliding block, a cross rod, a connecting rod, a vertical rod pressure spring, a vertical rod sliding block and a rocker arm sliding block which are arranged in the longitudinal direction, the vertical rod and the cross rod are vertically fixed together, the vertical rod is horizontally fixed on one side of the fixed die base plate and is flush with the side surface of the fixed die base plate, the cross rod is perpendicular to the fixed die base plate, and the cross rod sliding block is sleeved; the vertical rod sliding block is sleeved on the vertical rod and can move up and down along the vertical rod; the rocker arm sliding block is connected with the groove frame of the vertical rod sliding block through a sliding pair and is hinged with one end of a rocker arm on the core rotating disc; two ends of the connecting rod are respectively connected with the transverse rod sliding block and the vertical rod sliding block through hinges; one end of the left rotating rod and one end of the right rotating rod are connected together through a hinge, the other end of the left rotating rod is connected with the cross rod sliding block through a hinge, the other end of the right rotating rod is connected with one end of the cross rod through a fixed hinge, a cylindrical pin is fixed on the right rotating rod close to the fixed hinge, the cylindrical pin is fixed on the right rotating rod close to the fixed hinge, and the vertical rod pressure spring is sleeved on the vertical rod and placed between the vertical rod sliding block and the cross rod; the utility model discloses a mould, including the fixed die plate, horizontal pole pressure spring cover, montant slider, movable mould and fixed die plate, the montant slider is equipped with for being convenient for gliding square hole, truss and guide rail groove, truss middle installation rocking arm slider on the horizontal pole just place on horizontal pole slider and horizontal pole, install the pressure spring board in the middle of the montant slider, montant slider and spring overlap joint's position, one set of mould is constituteed with the fixed die plate to the movable mould, the movable mould comprises movable mould main part, release link, push rod, push pedal and sales promotion board, release link and push rod are installed to movable mould main part rear middle part position, release link and push rod fixed mounting are in the push pedal, release link and push rod rear have the push pedal, the ejector.

As a further improvement of the invention, a coolant channel which is convenient for cooling the plastic part is designed in the mold core and the movable mold, and a coolant channel is arranged to facilitate the introduction of coolant.

As a further improvement of the invention, a reset rod hole for the reset rod to pass through, a cavity hole for the outer surface of the molded plastic part and a guide rod hole for the guide rod to pass through are respectively arranged on the movable die at the middle position of the butt joint surface of the movable die and the fixed die plate, and the reset rod for the reset of the die push plate is arranged on the push plate; a guide rod convenient for accurate die assembly and guiding of the movable die and the fixed die is arranged on the core rotating disc; the movable die is provided with a guide rod hole matched with the guide rod, so that the reset of the die push plate and the die closing guide are facilitated.

The invention provides a mold for a long cylindrical plastic part with a rotatable core, which has the following beneficial effects:

1) the application has designed a core rolling disc, during general mould die sinking, the distance of die sinking must be greater than the length of core and mould the length of piece again, because the length of the piece is moulded to long section of thick bamboo class is very long, consequently, the die sinking distance is just greatly increased, the rotation core has been adopted in this design, when the mould is opened promptly, after the core takes off from type die cavity hole, rotate the core rolling disc rapidly promptly, make the cavity hole axis dislocation in core axis and the movable mould, just need not to continue the die sinking this moment again, can release the piece of moulding, because the core has been dodged, the piece of moulding that releases can not interfere with the core, the drawing of patterns stroke has been reduced. The occupied space of the equipment is saved, the total time of molding the plastic part is saved, and the efficiency of the equipment is improved;

2) the transverse rod sliding block is indirectly pushed by the left rotating rod and the right rotating rod, the moving speed of the transverse rod sliding block can be greatly increased by the design, and the transverse rod sliding block can move for a large distance by moving the movable die for a small distance, so that the rotating speed of the core rotating disc is increased, the positions of the axis of the core and the axis of the cavity hole are quickly staggered, and the plastic part cannot interfere with the core when pushed out;

3) the rotation of this application core rolling disc need not to rely on extra power supply, only needs to utilize the die sinking power of mould itself can accomplish the rotation of shaping core rolling disc, has practiced thrift the resource.

Drawings

FIG. 1 is a general schematic of the present invention;

FIG. 2 is a partial schematic view of the first embodiment of the present invention;

FIG. 3 is a partial schematic view of the present invention;

FIG. 4 is a partial schematic view of the third embodiment of the present invention;

FIG. 5 is a partial schematic view of the present invention;

FIG. 6 is a partial schematic view of the present invention;

FIG. 7 is a schematic view illustrating an open mold state of the present invention;

FIG. 8 is a schematic view of the rotation of the core turn disc of the present invention;

FIG. 9 is a schematic view of a mold release of the present invention;

FIG. 10 is a view showing a mold clamping state of the present invention.

Illustration of the drawings:

1. a fixed die base plate; 2. a core rotating disk; 2-1, a rocker arm; 3. fixing a template; 4. a sprue bush; 5. a core; 6. a guide bar; 7. a cylindrical pin; 8. a cross bar compression spring; 9. a right rotating rod; 10. a left rotating rod; 11. a cross bar slider; 12. a cross bar; 12-1, a cross bar retaining ring; 13. a connecting rod; 14. a vertical rod; 15. a vertical rod compression spring; 16. a vertical rod sliding block; 16-1, square holes; 16-2, a slot frame; 16-3, guide rail grooves; 16-4, a compression spring plate; 17. a rocker arm slider; 18. moving the mold; 19. a reset lever; 19-1, a cavity hole; 19-2, a guide rod hole; 19-3, a reset rod; 20. a push rod; 21. pushing the plate; 22. a push pin plate; 23. and (5) molding.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

the invention provides a mold for a long cylindrical plastic part with a rotatable core, and aims to solve the problems that the existing conventional mold has large space for opening the mold and taking the plastic part when the long cylindrical plastic part is injected, the guide rail is long for the operation of the mold, the equipment occupies large space of a factory, and the total time for processing the plastic part is long due to long-distance opening and closing of the mold. The mold for the long cylindrical plastic part with the rotatable core is designed, the rotating core is adopted, when the mold is opened, the core rotating disc is rapidly rotated after the core is separated from the cavity hole, so that the axis of the core is staggered with the axis of the cavity hole in the movable mold, the mold opening is not needed to be continued at the moment, the plastic part can be pushed out, and the mold core is already kept away, so that the pushed plastic part cannot interfere with the core, and the mold opening stroke is reduced. And accurate, reliable, efficient and quick.

In the core rotatable mold shown in fig. 1, when the mold is closed, the fixed mold plate 3 is fixed on the fixed mold base plate 1, a rotation resetting device for rotating the core is installed on one side of the fixed mold base plate 1, and a cylindrical pin 7 on the transverse direction of the rotation resetting device corresponds to a push pin plate 22 installed on the movable mold 3. When the mold is opened or closed, the core rotating and resetting device drives the core rotating disc to rotate, so that the core is driven to rotate. The rear end of the movable die 18 is provided with a reset rod 19 and a plastic push rod 20, the reset rod 19 and the push rod 20 are fixedly arranged on a push plate 21, and the tail end of the movable die 18 is provided with an inner concave strip for displaying the movement distance of the push plate 21.

As shown in fig. 2 and 3: the fixed die plate 3 is installed on the fixed die base plate 1, the rotatable core rolling disc 2 is installed at the middle position of the fixed die plate 3, the core 5 and the guide rod 6 are installed on the core rolling disc 2, and a mechanical device convenient for rotating the core rolling disc 2 to rotate is arranged at an opening in one side of the fixed die plate 3. And the middle part of the core rotating disc is provided with an injection molding sprue bush 4. A device for enabling the core rotating disc 2 to rotate and reset is installed on one side of the fixed die base plate 1, the device is fixedly installed on one side of the fixed die base plate 1 and consists of a cylindrical pin 7, a cross rod pressure spring 8, a right rotating rod 9, a left rotating rod 10, a cross rod sliding block 11, a cross rod 12, a connecting rod 13, a vertical rod 14, a vertical rod pressure spring 15, a vertical rod sliding block 16, a rocker arm sliding block 17 and a rocker arm 2-1 in the longitudinal direction. The base of the cross rod 12 is arranged on the fixed die base plate 1, the left side of the fixed die base plate is respectively provided with a right rotating rod 9, a cross rod pressure spring 8 and a left rotating rod 10, the cross rod pressure spring 8 is arranged between the right rotating rod 9 and the left rotating rod 10, and the tail part of the right rotating rod is provided with a cylindrical pin 7. The upper end of the cross rod 12 is provided with a vertical rod 14, and the other end of the vertical rod 14 is fixed on the fixed template 1 through a mounting base. A vertical rod pressure spring 15 is arranged in the middle of the vertical rod, a vertical rod sliding block 16 is arranged at the upper end of the vertical rod pressure spring 15, a rocker arm sliding block 17 is arranged between the groove frames in the vertical rod sliding block 16, and the rocker arm sliding block 17 is connected with the rocker arm 2-1. The rocker arm 2-1 drives the rotation of the rotary core rotating disc 2.

As shown in figures 4 and 5, a square hole 16-1 which is formed on the vertical rod sliding block 16 and is convenient to slide, a groove frame 16-2 and a guide rail groove 16-3 are arranged, a rocker arm sliding block 17 is arranged in the middle of the groove frame 16-2, and a pressure spring plate 16-4 is arranged at a position overlapped with a spring. The tail part of the cross bar 12 is provided with a cross bar baffle ring 12-1 for limiting the position of a cross bar compression spring.

As shown in FIG. 6, a reset rod hole 18-1, a cavity hole 18-2 and a guide rod hole 18-3 are respectively arranged at the middle position of the butt joint surface of the movable mold and the fixed mold plate.

As shown in fig. 7, 8, 9 and 10, the core rotatable mold is in several states when the mold is cooled by injection molding when the core is not rotated and the core is rotated, and fig. 10 is in a mold clamping state. The working state of the die and the advantageous characteristics thereof can be better illustrated through the demonstration of the states.

The working principle of the application is as follows:

when the mold is closed, the axis of the core is coaxial with the axis of the cavity hole of the movable mold, wherein the core is used for molding the inner surface of the plastic part; the cavity hole is used for molding the outer surface of the plastic part; when the mold is opened, the movable mold is opened under the action of an injection machine, the movable mold moves rightwards in the drawing, the mold core is gradually separated from a cavity hole of the movable mold, when the mold core completely leaves the cavity hole of the movable mold, the pushing pin plate of the movable mold touches the cylindrical pin on the right rotating rod at the moment, the pushing pin plate pushes the cylindrical pin of the right rotating rod to move rightwards along with the continuous movement of the movable mold, the right rotating rod is driven to rotate clockwise, the left rotating rod rotates anticlockwise, the included angle between the left rotating rod and the right rotating rod is continuously reduced, the cross rod slider moves rightwards rapidly under the drive of the left rotating rod, the vertical rod slider moves downwards rapidly under the action of the connecting rod, the rocker arm slider moves downwards along with the left rotating rod, and the rocker arm slider and the rocker arm of the mold core rotating disk are connected by a hinge, so that the mold core rotating disk rotates anticlockwise, and, at the moment, the movable die stops moving rightwards, the ejector rod of the injection molding machine pushes the push plate to move the push plate leftwards, the push rod on the push plate pushes out the long cylindrical plastic part in the cavity hole, the pushed plastic part cannot interfere with the mold core, and the demolding stroke is greatly shortened.

When the die is closed, the movable die moves leftwards, the pushing pin plate on the movable die moves leftwards, the pushing pin plate is separated from the cylindrical pin of the right rotating rod, the transverse rod sliding block moves leftwards rapidly to reset under the action of the pressure spring, the included angle between the left rotating rod and the right rotating rod is increased, the vertical sliding block moves upwards rapidly to reset under the pushing of the connecting rod and the action of the vertical rod pressure spring, the rocker sliding block moves upwards synchronously to drive the core rotating disc to rotate clockwise to reset, and the axis of the core is coaxial with the cavity hole of the movable die again at the moment; the movable die continues to move leftwards to be matched with the die, the guide rod and the die core on the die core rotating disc are inserted into the guide rod hole and the die cavity hole of the movable die, the reset rod on the push plate pushes the push plate to reset, and the movable die and the fixed die part are matched with the die. The inside of the mold core and the inside of the movable mold of the mold are both provided with coolant channels convenient for cooling the plastic parts, and the tail ends of the mold core and the movable mold are both provided with reserved mounting holes and corresponding matching devices which are mounted with the injection molding machine.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made according to the technical spirit of the present invention are within the scope of the present invention as claimed.

Claims

1. A mold for a long cylindrical plastic part with a rotatable core comprises a fixed mold base plate (1), a core rotating disc (2), a fixed mold plate (3), a sprue bush (4), a core (5), a guide rod (6), a cylindrical pin (7), a cross rod pressure spring (8), a right rotating rod (9), a left rotating rod (10), a cross rod sliding block (11), a cross rod (12), a connecting rod (13), a vertical rod (14), a vertical rod pressure spring (15), a vertical rod sliding block (16), a rocker arm sliding block (17), a movable mold (18), a reset rod (19), a push rod (20), a push plate (21) and a push pin plate (22), and is characterized in that the rotatable core rotating disc (2) is installed on the fixed mold base plate (1), the core (5) and the guide rod (6) are installed on the core rotating disc (2), and the middle part of the core rotating disc (2) is provided with the sprue, the core rotating disc is characterized in that a rocker arm (2-1) is fixed on one side of the core rotating disc (2), the core rotating disc (2) is positioned between a fixed die base plate (1) and a fixed die plate (3) through a convex shoulder and can rotate, the fixed die base plate (1) and the fixed die plate (3) are fixed together through screws, a device for enabling the core rotating disc (2) to rotate and reset is installed on the fixed die base plate (1) through the rocker arm (2-1), the device for rotating and resetting is fixedly installed on one side of the fixed die base plate (1) and consists of a transverse cylindrical pin (7), a transverse rod pressure spring (8), a right rotating rod (9), a left rotating rod (10), a transverse rod sliding block (11), a transverse rod (12), a longitudinal connecting rod (13), a vertical rod (14), a vertical rod pressure spring (15), a vertical rod sliding block (16) and a rocker arm sliding block (17), and the vertical, the vertical rod (14) is horizontally fixed on one side of the fixed die base plate (1) and is flush with the side surface of the fixed die base plate (1), the cross rod (12) is perpendicular to the fixed die base plate (1), and the cross rod sliding block (11) is sleeved on the cross rod (12) and can move along the cross rod (12); the vertical rod sliding block (16) is sleeved on the vertical rod (14) and can move up and down along the vertical rod (14); the rocker arm sliding block (17) is connected with a groove frame (16-2) of the vertical rod sliding block (16) through a sliding pair and is hinged with one end of a rocker arm (2-1) on the core rotating disc (2); two ends of the connecting rod (13) are respectively connected with the transverse rod sliding block (11) and the vertical rod sliding block (16) through hinges; one end of the left rotating rod (10) is connected with one end of the right rotating rod (9) through a hinge, the other end of the left rotating rod (10) is connected with the cross rod sliding block (11) through a hinge, the other end of the right rotating rod (9) is connected with one end of the cross rod (12) through a fixed hinge, a cylindrical pin (7) is fixed on the right rotating rod (9) close to the fixed hinge, the cylindrical pin (7) is fixed on the right rotating rod (9) close to the fixed hinge, and the vertical rod pressure spring (15) is sleeved on the vertical rod (14) and placed between the vertical rod sliding block (16) and the cross rod (12); the transverse rod pressure spring (8) is sleeved on the transverse rod (12) and is placed between transverse rod retaining rings (12-1) on a transverse rod sliding block (11) and the transverse rod (12), a square hole (16-1), a groove frame (16-2) and a guide rail groove (16-3) which are convenient to slide are formed in the vertical rod sliding block (16), the guide rail groove (16-3) is formed in the groove frame (16-2), a rocker arm sliding block (17) is installed in the middle of the groove frame (16-2), a pressure spring plate (16-4) is arranged at the position where the vertical rod sliding block (16) is in lap joint with a spring, a set of die is formed by the movable die (18) and the fixed die plate (1), the movable die (18) is formed by a movable die main body, a reset rod (19), a push rod (20), a push plate (21) and a push pin plate (22), the reset rod (19) and the push rod (20), reset lever (19) and push rod (20) fixed mounting have push pedal (21) on push pedal (21), reset lever (19) and push rod (20) rear have push pedal (21), ejector pin board (22) are installed to one side that movable mould (18) lean on core rolling disc (2).

2. A mold for a long cylindrical plastic member with a rotatable core according to claim 1, wherein: the inner parts of the core (5) and the movable mould (18) are designed with coolant channels which are convenient for cooling the plastic part (23).

3. A mold for a long cylindrical plastic member with a rotatable core according to claim 1, wherein: and a reset rod hole (18-1) for a reset rod (19) to pass through, a cavity hole (18-2) on the outer surface of the molding plastic part and a guide rod hole (18-3) for a guide rod (6) to pass through are respectively arranged in the middle of the butt joint surface of the movable mold (18) and the fixed mold plate (3).