CN213733190U - Mold for plastic injection molding - Google Patents

Abstract

The utility model discloses a mould for plastic injection moulding, which comprises a mould body, wherein the top end of the mould body is fixedly connected with a top plate, a sprue bush is arranged at the middle position of the top plate, four corners at the upper left of the sprue bush are fixedly connected with bolts, a movable mould plate is movably connected below the top plate, a bottom plate is fixedly connected at the bottom end of the mould body, an ejector rod is movably connected inside the mould body, a mould core is arranged at the upper right of the ejector rod, a mould cavity is arranged at the left end of the mould core, the ejector rod can effectively return after demoulding by using a reset spring and a limiting rod, the stability of the ejector rod return is improved, the phenomenon that the ejector rod can not return and the die is efficiently damaged is avoided, the ejector rod can be assisted to carry out reciprocating motion by using a ball sleeve, the ejector rod is limited at the same time, and the ejector rod is prevented from shaking, thereby affecting the quality of the formed product.

Description

Mold for plastic injection molding

Technical Field

The utility model relates to an injection mold technical field specifically is a mould for plastic injection moulding.

Background

The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate dimensions, and the injection molding is a processing method used when parts with complex shapes are produced in batches.

However, when the ejector rod in the existing injection molding mold is operated, the ejector rod is easy to bend and break after being ejected out for a common distance due to the rising of the mold temperature, and as a result, the exposed ejector rod cannot be reset to crash a female mold when the mold is closed next time, and the ejector rod has poor motion stability and poor return effect; and the gas in the mold cavity of the existing injection mold is not easy to discharge, and a small amount of melt overflows, so that the quality defects of cavities, air holes, sparse tissues, silver lines and the like of a formed product can be caused.

For this purpose, a mold for plastic injection molding is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mould for plastic injection moulding can prevent that the crooked rupture phenomenon from appearing at the in-process of motion in the ejector pin, can improve the stability of ejector pin back and forth movement moreover, is favorable to the inside gas of die cavity effectively to be discharged simultaneously, improves the quality of shaping article to solve the problem of proposing in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a mould for plastic injection moulding, includes the mould body, the top fixedly connected with roof of mould body, the gate cover has been seted up to the intermediate position department of roof, the equal fixedly connected with bolt of four corners of gate cover upper left side, the below swing joint of roof has the movable mould board, the bottom fixedly connected with bottom plate of mould body, the inside swing joint of mould body has the ejector pin, the upper right side of ejector pin is provided with the core, the die cavity has been seted up to the left end of core.

Through adopting above-mentioned technical scheme, at first pour into the plastic fuse-element into in the runner cover into for the plastic fuse-element carries out the die cavity inside through sprue and subchannel, dispels the heat and exhausts to the die cavity inside through the blast pipe, treats the finished product through the cooling water in to the core simultaneously and cools off, after the finished product cooling is stereotyped, promotes the ejector pin through power device and makes the ejector pin ejecting with the finished product can.

Preferably, the left end swing joint of ejector pin has the ball cover, the inside rotation of ball cover is connected with a plurality of groups of ball, the left end fixedly connected with stabilizing block of ball cover, ball cover and stabilizing block all are provided with two sets ofly, and two sets of ball cover evenly distributed are at the both ends about the ejector pin, stabilizing block is the triangle-shaped.

Through adopting above-mentioned technical scheme, with two sets of ball cover evenly distributed both ends about the ejector pin and with the ejector pin rotation link together, utilize two sets of ball covers can assist the ejector pin to carry out the up-and-down back and forth movement, in its supplementary, can carry on spacingly to the ejector pin again, prevent that the ejector pin from appearing rocking phenomenons such as to influence the quality of shaping article, the stability piece of triangle-shaped can improve the ball cover simultaneously, prevent that the ball cover from receiving external force influence and producing the phenomenon of slope.

Preferably, the bottom swing joint of ejector pin has the push rod, the upper right end swing joint of push rod has the gag lever post, the left side elastic connection of gag lever post has reset spring, reset spring and gag lever post all are provided with two sets ofly, the below fixedly connected with fixed column of push rod, the below swing joint of fixed column has the ejector pad.

Through adopting above-mentioned technical scheme, through the left side elastic connection reset spring at the gag lever post, the ejector pin makes reset spring form the extrusion space at the in-process that rises, after the ejector pin operation, automatic return after the reset spring extrusion to drive the ejector pin and reset, prevent that the ejector pin from moving one section distance back card in the inside of mould body, influence other die, two sets of fixed columns and push rod can prevent that the ejector pin from receiving external force to produce bending phenomenon simultaneously, improve the stability of ejector pin.

Preferably, the left end of the cavity is fixedly connected with an exhaust pipe, an overflow hole is formed in the joint of the exhaust pipe and the cavity, a push disc is movably connected to the left side of the overflow hole, a connecting rod is fixedly connected to the left end of the push disc, a pressure spring is elastically connected to the left end of the connecting rod, a pressing block is fixedly connected to the left end of the pressure spring, and an exhaust hole is formed in the left side of the pressing block.

Through adopting above-mentioned technical scheme, with the left end fixedly connected with blast pipe of die cavity, when the inside plastic fuse-element of die cavity is treated and will be overflowed, utilize and push away the dish and can prevent that the plastic fuse-element from overflowing through the blast pipe for push away the dish atress and remove left, make the pressure spring atress, discharge in the inside unnecessary gas of die cavity from the blast pipe, drive after the pressure spring atress simultaneously and push away the dish and remove right the reset.

Preferably, a main runner is arranged below the sprue bush, a sub-runner is arranged below the main runner, and two groups of mold feet are fixedly connected to the left side inside the mold body.

Through adopting above-mentioned technical scheme, through having seted up the sprue in the below of runner cover, the subchannel has been seted up to the below of sprue, and the plastic fuse-element passes through runner cover flow direction sprue to make the plastic fuse-element in the sprue carry out two sets of die cavities through the subchannel in, thereby can be even inject core and die cavity.

Preferably, the ejector rods are arranged in two groups, and the bottom plate is movably connected with the ejector rods.

By adopting the technical scheme, the bottom plate and the ejector rods are movably connected together, and the push block above the bottom plate is pushed by the external power device, so that the two groups of ejector rods push the to-be-formed product.

Compared with the prior art, the beneficial effects of the utility model are that:

1. set up fixed column and ejector pad through the below at the ejector pin, utilize two sets of fixed columns and two sets of push pedals to make the push rod more stable at the in-process of up-and-down motion, prevent the push rod atress and damage and crooked, utilize reset spring and gag lever post simultaneously, can make the ejector pin effectual return of carrying on after the drawing of patterns, improve the stability of ejector pin return, avoid the ejector pin to appear can not reset and hit the phenomenon of bad die, utilize the ball cover can assist the ejector pin efficient to carry out reciprocating motion, carry on spacingly to the ejector pin simultaneously, prevent that the ejector pin from appearing rocking, thereby influence the finished product quality.

2. Through setting up the blast pipe, pushing away set and pressure spring, utilize and push away set and pressure spring and can prevent that the inside fuse-element of die cavity from passing through the blast pipe and overflowing to influence the plumpness that the plastic was moulded plastics, when blockking the fuse-element, the inside gas of die cavity of again being convenient for discharges, avoids inside exhaust of die cavity not smooth to lead to the finished product quality defects such as cavity, gas pocket, tissue are dredged and the silver line to appear.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a view of the internal structure of the present invention;

FIG. 3 is an enlarged structural view of the ejector pin at the position A of the present invention;

fig. 4 is an enlarged structural view of the exhaust pipe at the position B of the present invention.

In the figure: 1. a top plate; 2. a bolt; 3. a sprue bush; 4. a mold body; 5. a base plate; 6. moving the template; 7. a mould leg; 8. a top rod; 9. a shunt channel; 10. a main flow channel; 11. a core; 12. fixing a column; 13. a push rod; 14. a stabilizing block; 15. a ball sleeve; 16. a return spring; 17. a limiting rod; 18. a push block; 19. an exhaust pipe; 20. a cavity; 21. pushing the disc; 22. a connecting rod; 23. a pressure spring; 24. an exhaust hole; 25. and (7) briquetting.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a mould for plastic injection moulding, as shown in fig. 1 to 2, including mould body 4, mould body 4's top fixedly connected with roof 1, runner cover 3 has been seted up to roof 1's intermediate position department, the equal fixedly connected with bolt 2 of four corners of 3 upper left sides of runner cover, roof 1's below swing joint has movable mould board 6, mould body 4's bottom fixedly connected with bottom plate 5, mould body 4's inside swing joint has ejector pin 8, ejector pin 8's upper right side is provided with core 11, die cavity 20 has been seted up to core 11's left end.

Through adopting above-mentioned technical scheme, at first through pouring into the plastic fuse-element in the runner cover 3 for the plastic fuse-element carries out the die cavity 20 inside through sprue 10 and subchannel 9, dispels the heat and exhausts to the inside of die cavity 20 through blast pipe 19, treats the shaping article through the cooling water and cools off in to the core 11 simultaneously, after the shaping article cooling design, promotes ejector pad 18 through power device and makes ejector pin 8 ejecting with the shaping article can.

Specifically, as shown in fig. 3, the left end of the ejector rod 8 is movably connected with a ball sleeve 15, the ball sleeve 15 is rotatably connected with a plurality of groups of balls, the left end of the ball sleeve 15 is fixedly connected with a stabilizing block 14, the ball sleeve 15 and the stabilizing block 14 are both provided with two groups, the two groups of ball sleeves 15 are uniformly distributed at the left end and the right end of the ejector rod 8, and the stabilizing block 14 is triangular.

Through adopting above-mentioned technical scheme, with two sets of ball cover 15 evenly distributed about ejector pin 8 both ends and with ejector pin 8 rotate to link together, utilize two sets of ball cover 15 can assist ejector pin 8 to carry out up-and-down back and forth movement, in being supplementary to it, can be spacing to ejector pin 8 again, prevent that phenomenon such as roof pin 8 from appearing rocking, thereby influence the quality of shaping article, the steady block 14 of triangle-shaped can improve ball cover 15's stability simultaneously, prevent that ball cover 15 from receiving the influence of external force and producing the phenomenon of slope.

Specifically, as shown in fig. 3, the bottom end of the ejector rod 8 is movably connected with a push rod 13, the upper right end of the push rod 13 is movably connected with a limit rod 17, the left side of the limit rod 17 is elastically connected with a return spring 16, the return spring 16 and the limit rod 17 are both provided with two sets, a fixed column 12 is fixedly connected below the push rod 13, and a push block 18 is movably connected below the fixed column 12.

Through adopting above-mentioned technical scheme, through the left side elastic connection reset spring 16 at gag lever post 17, ejector pin 8 makes reset spring 16 form the extrusion space at the in-process that rises, after 8 operations of ejector pin, automatic return after 16 extrusion of reset spring, thereby drive ejector pin 8 and reset, prevent that ejector pin 8 from moving one section distance back card in the inside of mould body 4, influence other die, two sets of fixed columns 12 and push rod 13 can prevent that ejector pin 8 from receiving external force and producing crooked phenomenon simultaneously, improve ejector pin 8's stability.

Specifically, as shown in fig. 4, the left end of the cavity 20 is fixedly connected with an exhaust pipe 19, an overflow hole is formed at the joint of the exhaust pipe 19 and the cavity 20, the left side of the overflow hole is movably connected with a push disc 21, the left end of the push disc 21 is fixedly connected with a connecting rod 22, the left end of the connecting rod 22 is elastically connected with a pressure spring 23, the left end of the pressure spring 23 is fixedly connected with a pressing block 25, and the left side of the pressing block 25 is provided with an exhaust hole 24.

Through adopting above-mentioned technical scheme, with the left end fixedly connected with blast pipe 19 of die cavity 20, the plastic fuse-element in the die cavity 20 is when will overflowing, utilizes and pushes away the dish 21 and can prevent that the plastic fuse-element from overflowing through blast pipe 19 for push away dish 21 atress and remove left, makes pressure spring 23 atress, and the unnecessary gas in the die cavity 20 is discharged from blast pipe 19, and pressure spring 23 atress back drives and pushes away dish 21 and remove right the restoration simultaneously.

Specifically, as shown in fig. 2, a main runner 10 is provided below the sprue bush 3, a branch runner 9 is provided below the main runner 10, and two sets of mold pins 7 are fixedly connected to the left side inside the mold body 4.

Through adopting above-mentioned technical scheme, through having seted up sprue 10 in the below of runner cover 3, runner 9 has been seted up to the below of sprue 10, and the plastic fuse-element flows to sprue 10 through runner cover 3 to make the plastic fuse-element in the sprue 10 carry out two sets of die cavities 20 through runner 9, thereby can be even carry out the injection to die core 11 and die cavity 20.

Specifically, as shown in fig. 2, two sets of the push rods 8 are arranged, and the bottom plate 5 is movably connected with the push rods 8.

By adopting the technical scheme, the bottom plate 5 and the ejector rods 8 are movably connected together, and the push block 18 above the bottom plate 5 is pushed by an external power device, so that the two groups of ejector rods 8 push the to-be-formed product.

The working principle is as follows: firstly, four groups of bolts 2 are screwed at four corners of a top plate 1, after a mold is checked, plastic melt flows to a main runner 10 through a sprue bush 3 by using external equipment, so that the plastic melt in the main runner 10 is subjected to two groups of cavities 20 through a branch runner 9, the inside of each cavity 20 is subjected to heat dissipation and exhaust through an exhaust pipe 19, after the plastic melt overflows from the inside of each cavity 20, the plastic melt can be blocked by using a push disc 21, meanwhile, the gas in each cavity 20 is discharged along the same trend, the effective discharge of the gas in each cavity 20 is facilitated, the quality of a formed product is improved, after the formed product is cooled and shaped, an external power device is used for pushing a push block 18 and a fixed column 12 to enable a formed product to be ejected by an ejector rod 8, the phenomenon of bending and breaking of the ejector rod 8 in the movement process is prevented, and the stability of the back-and-forth movement of the ejector rod 8 is improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a mould for plastic injection moulding, includes mould body (4), its characterized in that: the top fixedly connected with roof (1) of mould body (4), runner cover (3) have been seted up to the intermediate position department of roof (1), the equal fixedly connected with bolt (2) of four corners of runner cover (3) upper left side, the below swing joint of roof (1) has movable mould board (6), the bottom fixedly connected with bottom plate (5) of mould body (4), the inside swing joint of mould body (4) has ejector pin (8), the upper right side of ejector pin (8) is provided with core (11), die cavity (20) have been seted up to the left end of core (11).

2. The mold of claim 1, wherein: the left end swing joint of ejector pin (8) has ball cover (15), the inside rotation of ball cover (15) is connected with a plurality of groups of balls, the left end fixedly connected with stabilizing block (14) of ball cover (15), ball cover (15) and stabilizing block (14) all are provided with two sets ofly, and two sets of ball cover (15) evenly distributed are both ends about ejector pin (8), stabilizing block (14) are the triangle-shaped.

3. The mold of claim 1, wherein: the bottom swing joint of ejector pin (8) has push rod (13), the upper right end swing joint of push rod (13) has gag lever post (17), the left side elastic connection of gag lever post (17) has reset spring (16), reset spring (16) and gag lever post (17) all are provided with two sets ofly, the below fixedly connected with fixed column (12) of push rod (13), the below swing joint of fixed column (12) has ejector pad (18).

4. The mold of claim 1, wherein: the exhaust pipe is fixedly connected with the left end of the cavity (20), an overflow hole is formed in the joint of the exhaust pipe (19) and the cavity (20), a push disc (21) is movably connected with the left side of the overflow hole, a connecting rod (22) is fixedly connected with the left end of the push disc (21), a pressure spring (23) is elastically connected with the left end of the connecting rod (22), a pressing block (25) is fixedly connected with the left end of the pressure spring (23), and an exhaust hole (24) is formed in the left side of the pressing block (25).

5. The mold of claim 1, wherein: sprue (10) have been seted up to the below of runner cover (3), subchannel (9) have been seted up to the below of sprue (10), the left side fixedly connected with mould foot (7) of mould body (4) inside, mould foot (7) are provided with two sets ofly altogether.

6. The mold of claim 1, wherein: the ejector rods (8) are arranged in two groups, and the bottom plate (5) is movably connected with the ejector rods (8).

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