CN218429579U - Double-color mold core pulling structure and double-color mold - Google Patents

Abstract

The embodiment of the application discloses a double-color mold core pulling structure and a double-color mold, the double-color mold core pulling structure is arranged in a rear mold of the double-color mold, the slider is slidably embedded in a clamping space of the rear mold plate through the matching design of the slider and a shifting block, the matching design of the ejector rod and the slider and the inclined design of an inclined guide part of the shifting block, so that the rear mold plate of the double-color mold drives the slider to move under the guide of the inclined guide part in the mold opening process, core pulling is realized, and in the mold closing process, the rear mold plate drives the slider to return to the original position along the inclined guide part, so that the slider can move along with mold opening and mold closing in the clamping space of the rear mold plate, the core pulling structure meets the injection molding requirement of rotary injection molding of the double-color mold rear mold, relevant moving parts in the core pulling structure are independent of the double-color mold, independent of external auxiliary equipment of the double-color mold, the performance is reliable, the maintenance is simple, the mold occupation space is saved, the production efficiency of the mold is improved, the labor cost is controlled, and the whole development cost of the mold is not greatly influenced.

Description

Double-color mold core pulling structure and double-color mold

Technical Field

The application relates to the technical field of dies, in particular to a double-color die core pulling structure and a double-color die.

Background

Due to the special structural requirements of products, for example, when an inverted buckle structure exists in a product, a rear die springboard is required to be added to the die structure to meet the forming requirements of the product, the driving force for tripping the inner row position and the product comes from a shovel base, the shovel base is fixed on the springboard, the inner row position, a rear die core and the rear die board form a movable assembly on the rear die side of the injection die, the movable assembly moves towards the front die side of the injection die, and simultaneously, the inner row position moves towards one direction under the stirring of an inclined guide rail of the shovel base, and finally the inner row position and the product are tripped successfully.

The injection mold structure meeting the tripping requirement needs to enable a movable assembly consisting of the inner row position, the rear mold core and the rear mold plate to have a driving force for moving towards the front mold side when the mold is opened by injection molding, the injection mold cannot meet the condition, and in the prior art, a fixed-distance pulling plate needs to be added on the injection mold to enable the movable assembly to move towards the front mold side.

However, the two-color mold is formed by injecting two plastic materials on the same injection molding machine in two steps, in general design, one type of plastic material is injected according to two sets of mold designs, the glue positions of the front mold (fixed mold) sides of the two sets of molds are the same in the two-color mold design, the two sets of molds are fixed during injection production, and the other type of plastic material is injected by rotating 180 degrees after one type of plastic material is injected on the rear mold (movable mold) side. This case is not possible with the use of a distance-adjustable draw plate to accomplish this rotation of the rear mold. And the core pulling structure of the injection mold with the fixed-distance pulling plate is adopted, so that the core pulling structure cannot be suitable for the core pulling requirement of the springboard of the double-color mold with the rotating action at the rear mold side.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a double-colored mould core pulling structure and double-colored mould, can solve the problem of loosing core of a springboard of the existing injection mould under the condition that the rotation of a rear mould cannot be realized.

The embodiment of the application provides a double-colored mould structure of loosing core sets up in the back mould of double-colored mould, back mould includes the edge thimble board, springboard and the back template that the die sinking direction of double-colored mould set gradually, the double-colored mould structure of loosing core includes: the sliding block is arranged on one surface, facing the springboard, of the rear template, a clamping space is formed on one surface, facing the springboard, of the rear template, two opposite side edges of the sliding block are slidably embedded in the clamping space, and a through hole is formed in the sliding block; the shifting block is arranged on the springboard and provided with an inclined guide part which penetrates through a through hole of the sliding block and is in sliding fit with the sliding block, a slotted hole matched with the inclined guide part is formed in one surface, facing the springboard, of the rear template, and the inclined guide part penetrates through one end of the through hole and extends into the inner side of the slotted hole; the ejector rod is arranged along the die opening direction, one end of the ejector rod is connected with the ejector plate, and the other end of the ejector rod penetrates through the springboard and is abutted against one surface, facing the springboard, of the sliding block; in the die opening process, the rear die plate drives the sliding block to slide from one end of the clamping space to the other end of the clamping space along the inclined guide part of the shifting block, the ejector plate drives the ejector rod to eject, the ejector rod is in abutting joint with one surface, facing the springboard, of the sliding block in a first ejection stroke to eject the sliding block, and the ejector rod is separated from the sliding block in a second ejection stroke and is in abutting joint with one surface, facing the springboard, of the rear die plate to eject the rear die plate.

Optionally, two pressing plates are convexly arranged on one side, facing the springboard, of the rear template, a gap is reserved between the pressing plates and one side, facing the springboard, of the rear template to form the clamping space, and two opposite ends of the sliding block are respectively slidably embedded into the clamping space; one surface of the springboard facing the rear template is provided with a containing groove matched with the two pressing plates and the sliding block; and in a matched die state, the two pressing plates and the sliding block are positioned in the accommodating groove.

Optionally, a groove is formed in one surface, facing the springboard, of the rear template, the two pressing plates are arranged on the inner walls of the two opposite sides of the groove at intervals, and the groove hole is formed in the middle of the bottom surface of the groove; a gap is reserved between the pressing plate and the bottom surface of the groove to form the clamping space, a protruding part matched with the clamping space is convexly arranged on the side edge of the sliding block, the protruding part is inserted into the clamping space, and the sliding block is limited in the groove by the two pressing plates; in a die assembly state, the slide block is positioned at one end of the inner side of the groove; in the die opening process, the sliding block slides to the other end of the inner side of the groove from one end of the inner side of the groove along the inclined guide part.

Optionally, in a die assembly state, at least one positioning piece is arranged at one end, far away from the sliding block, of the inner side of the groove; in the mould opening process, when the sliding block slides to the other end of the inner side of the groove, the sliding block is tightly attached to the positioning piece.

Optionally, the shifting block comprises a connecting part and an inclined guide part which are sequentially arranged, and the shifting block is fixedly connected with the springboard through the connecting part; in the die sinking process, when the sliding block slides to the other end of the inner side of the groove, the port of one end of the springboard is far away from the through hole, and the inclined guide part of the shifting block is far away from the end face of one end of the connecting part and is parallel and level.

Optionally, at least one elastic piece is arranged on the end face of one end, away from the positioning piece, of the sliding block, and one end, away from the sliding block, of the elastic piece abuts against the inner wall of the groove.

Optionally, the middle of the inner wall of the groove abutting against the elastic member protrudes in a direction away from the slider to form a protruding portion, and the protruding portion forms an avoidance groove for the ejector rod to extend into; one end of the ejector rod, which is far away from the ejector pin plate, extends into the inner side of the avoiding groove in the second ejection stroke so as to push the rear template.

Optionally, when the sliding block is tightly attached to the positioning member, a gap exists between the top rod and the sliding block.

Meanwhile, the embodiment of the application also provides a double-color mold, the double-color mold comprises two rear molds which are arranged at intervals, and each rear mold is internally provided with two double-color mold core-pulling structures; the two ends of the rear die core of the rear die are respectively provided with one double-color die core pulling structure, and the inclined directions of the inclined guide parts of the shifting blocks of the two double-color die core pulling structures are opposite.

Optionally, the rear mold comprises a lower ejector plate, an upper ejector plate, a springboard and a rear mold plate which are sequentially arranged, and the lower ejector plate and the upper ejector plate are stacked; the rear die also comprises an ejector rod, one end of the ejector rod is connected with the lower ejector plate, and the other end of the ejector rod sequentially penetrates through the upper ejector plate and the springboard and is inserted in the rear die plate; the ejector rod is sleeved with a spring, one end of the spring is abutted to one surface, facing the springboard, of the upper ejector pin plate, and the other end of the spring penetrates through the springboard and is abutted to one surface, facing the springboard, of the rear template.

The utility model has the advantages of, a two-color mold core pulling structure is provided, set up in the back mould of two-color mold, through the cooperation design of slider and shifting block, the cooperation design of ejector pin and slider and the slope design of the oblique guide portion of shifting block, the slider inlays to be located in the block space of back template slidable, make the back template of two-color mold drive the slider and move down at the guide of the oblique guide portion of shifting block at the die sinking in-process, thereby make the slider slide to the block space other end along oblique guide portion by block space one end in the die sinking process, realize loosing core, and in the die sinking process of back template, back template area moves the slider and returns the normal position along the oblique guide portion of shifting block, thereby realize the slider along with the reciprocating motion of die sinking, compound die in the block space of back template, make the core pulling structure satisfies the rotatory injection molding demand of moulding plastics of two-color mold, relevant moving part is all independent of two-color mold itself in the core pulling structure, do not rely on two-color mold external auxiliary assembly, the dependable performance, it is simple to maintain, save mould occupation space, promote mould production efficiency, control cost and the whole development cost of the mould does not influence is big.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a two-color mold core pulling structure provided in an embodiment of the present application in a mold closing state;

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

fig. 3 is a schematic structural diagram of a two-color mold core pulling structure provided in an embodiment of the present application in an open state;

fig. 4 is a schematic structural view of a slider and a shifting block in a critical state in a mold opening state of a dual-color mold core pulling structure provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a two-color mold;

FIG. 6 isbase:Sub>A sectional view taken along line A-A of FIG. 5;

FIG. 7 is an enlarged view of the structure at B of FIG. 6;

fig. 8 is a schematic structural diagram of a two-color mold core pulling structure and a rear mold plate in a mold closing state according to an embodiment of the present application;

fig. 9 is a schematic structural view of a two-color mold core pulling structure and a rear mold plate in an open state according to an embodiment of the present application;

fig. 10 is a schematic view of an assembly structure of a shift block and a springboard in a two-color mold core pulling structure according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a two-color mold core pulling structure and a two-color mold rear mold assembly according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another angle of the two-color mold core pulling structure and the two-color mold post-mold assembly according to an embodiment of the present application;

FIG. 13 is a schematic view of the structure of the rear mold plate separated from the diving board in the two-color mold;

FIG. 14 is a schematic view of an assembly structure of a product and an inner row bit;

fig. 15 is a schematic structural diagram of the trip of the shovel base shifting inner row position and the product.

Description of reference numerals:

100. the core pulling structure of the double-color mold comprises a core pulling structure of the double-color mold, 110, a pressing plate, 120, a sliding block, 121, a through hole, 122, a protruding part, 123, an elastic part, 130, a shifting block, 131, a connecting part, 132, an inclined guide part, 140 and a push rod;

200. the double-color mold comprises a double-color mold body 201, a turntable 210, a front mold body 220, a rear mold body 221, an inner traveling position 222, an ejector rod 223, a spring 230, a rear mold plate 231, a groove 232, a slotted hole 233, a positioning piece 234, a protruding part 235, an avoiding groove 240, a springboard 241, a shovel base 250, an ejector plate 251, an upper ejector plate 252 and a lower ejector plate;

300. and (5) producing the product.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present application, are given by way of illustration and explanation only, and are not intended to limit the present application. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.

The utility model provides a double-colored mould core pulling structure, set up in the back mould of double-colored mould, through the cooperation design of slider and shifting block, the cooperation design of ejector pin and slider and the slope design of the oblique guide portion of shifting block, the slider inlays to be located in the block space of back template slidable, make the back template of double-colored mould drive the slider and move down at the guide of the oblique guide portion of shifting block at the die sinking in-process, thereby make the slider slide to the block space other end along oblique guide portion by block space one end in the die sinking process, realize loosing core, and in the die sinking process of back template, back template area moves the slider and returns the normal position along the oblique guide portion of shifting block, thereby realize the slider along with the reciprocating motion of die sinking, compound die in the block space of back template, make core pulling structure satisfies the rotatory injection moulding plastics demand of double-colored mould back mould, relevant moving part is all independent of double-colored mould itself in the core pulling structure, does not rely on double-colored mould external auxiliary assembly, the dependable performance, it is simple to maintain, saves mould occupation space, promotes mould production efficiency, control cost of labor and the whole development cost influence is not big to the mould. As a typical application, the core pulling structure of the double-color mold can be used in a rear mold of the double-color mold to be matched with the rotating action of the rear mold in the injection molding process of the double-color mold.

In an embodiment of the present application, referring to fig. 1, fig. 2, fig. 3, and fig. 4, the dual color mold core pulling structure 100 includes: a pressure plate 110, a slide block 120, a shifting block 130 and a push rod 140. The number of the pressing plates 110 is two, the pressing plates are arranged in parallel at intervals, the sliding block 120 is arranged between the two pressing plates 110, two opposite sides of the sliding block 120 are respectively embedded with the surfaces of the adjacent pressing plates 110, the sliding block 120 can slide along the length direction of the two pressing plates 110, the sliding block 120 is provided with a through hole 121, the shifting block 130 comprises a connecting portion 131 and an inclined guide portion 132 which are sequentially arranged, one end of the inclined guide portion 132 is inserted into the through hole 121, the inclined guide portion 132 of the shifting block 130 is obliquely arranged relative to the sliding direction of the sliding block 120, and therefore the sliding block 120 can be forced to move along one direction. The top rod 140 is vertically arranged, and the upper end of the top rod 140 is abutted against the lower surface of the slide block 120.

Referring to fig. 5 to 13, when the dual color mold core pulling structure 100 is assembled in the dual color mold 200, the assembling structure with the dual color mold 200 is as follows: referring to fig. 5, the two-color mold 200 includes a front mold 210 and a rear mold 220, the two-color mold core pulling structure 100 is disposed in the rear mold 220 of the two-color mold 200, the rear mold 220 includes a rear mold plate 230 and a springboard 240 which are sequentially disposed, referring to fig. 7 and 8, a groove 231 is disposed on one side of the rear mold plate 230 facing the springboard 240, two pressing plates 110 are disposed on inner walls of two opposite sides of the groove 231, the two pressing plates 110 cooperate to limit the slider 120 at one end of the inner side of the groove 231, and the pressing plates 110 are fixedly mounted in the groove 231 through screws, so as to ensure that the slider 120 cannot fall from the groove 231 of the rear mold plate 230 in the mold opening process of the rear mold 230. Referring to fig. 1, 7 and 8, when the rear mold plate 230 is in a mold closing state, referring to fig. 1, 7 and 8, one end of the inclined guide portion 132 of the shift block 130, which is far away from the connecting portion 131, is located above the slider 120 and extends into the slot 232, the slider 120 is sleeved on one end of the inclined guide portion 132, which is close to the connecting portion 131, through the through hole 121, the slider 120 is located at one end inside the slot 231, referring to fig. 10, the connecting portion 131 of the shift block 130 is located below the slider 120 and is fixedly connected with the ramp 240 through a screw, so as to form a position of the shift block 130 on the ramp 240, referring to fig. 8, an inclined direction of the inclined guide portion 132 of the shift block 130 faces one end of the slot 231, which is far away from the slider 120, and an inclined direction of the inclined guide portion 132 deviates from a mold opening direction of the two-color mold 200 by a certain angle, which is greater than 0 ° and less than 90 °. Referring to fig. 10 to 13, the lift pins 140 are provided along the mold opening direction of the two-color mold 200, and in the mold closed state, one end of the lift pins 140 is fixedly connected to the lift pin plate 250 by bolts, and the other end of the lift pins 140 passes through the jump plate 240 and abuts against the slider 120 facing the jump plate 240.

Referring to fig. 3, 9 and 13, when the mold is opened, the rear mold plate 230 moves towards the front mold 210 of the two-color mold 200, the rear mold plate 230 is separated from the ramp 240, the pressing plate 110 then moves with the mold plate 230, and the slider 120 is further driven to move from one end of the ramp 132 close to the connecting portion 131 to one end of the ramp 132 away from the connecting portion 131 along the ramp 132 of the dial 130, because the ramp 132 moves towards the groove 231 and away from one end of the slider 120, during the movement of the slider 120 along the ramp 132, the slider 120 slides from one end inside the groove 231 to the other end inside the groove 231 along the pressing plate 110 under the guiding action of the ramp 132, so as to realize core pulling. When the mold is closed, the rear mold plate 230 moves towards the direction of the springboard 240, and drives the slider 120 to return to one end of the inclined guide part 132 close to the connecting part 131 along the inclined guide part 132, and when the rear mold plate 230 is attached to the springboard 240, the slider 120 returns to the original position along the pressure plate 110, namely, the position of the slider 120 in the groove 231 in the mold closing state is returned. So that the slide 120 performs a reciprocating movement in the groove 231 in accordance with the switching of the mold opening and closing. In the process of opening the mold, the ejector rod 140 has two ejection strokes, namely a first ejection stroke and a second ejection stroke, in the first ejection stroke, the ejector rod 140 is ejected under the driving of the ejector plate 250, the ejector rod 140 ejects the slider 120 to move along the inclined guide portion 132, the slider 120 slides from one end of the inner side of the groove 231 to the other end of the inner side of the groove 231 under the guide of the inclined guide portion 132, and the inclined guide portion 132 is obliquely arranged and inclines away from the mold opening direction, so that the slider 120 is separated from the ejector rod 140 in the sliding process, after the slider 120 is separated from the ejector rod 140, the ejector rod 140 performs the second ejection stroke, one end of the ejector rod 140, which is far away from the ejector plate 250, is abutted against one surface of the rear mold plate 230, which faces the jump plate 240, and the ejector rod 140 ejects the rear mold plate 230 to open the mold under the driving of the ejector plate 250. A gap is left between the pressing plate 110 and the bottom surface of the groove 231, so that a clamping space (not shown in the figure) is formed between the pressing plate 110 and the rear mold plate 230 toward one surface of the jump board 240 (specifically, the bottom surface of the inner side of the groove 231), referring to fig. 1 and 3, a protruding portion 122 matched with the clamping space is convexly arranged on the side edge of the slider 120 adjacent to the pressing plate 110, the protruding portion 122 is embedded into the adjacent clamping space, a 'hanging' state of the slider 120 between the two pressing plates 110 is formed, the slider 120 is limited in the groove 231 by the pressing plate 110 through the matching of the clamping space and the protruding portion 122, the stability of the assembly of the slider 120 in the groove 231 is ensured, and the slider 120 slides in the clamping space through the protruding portion 122.

In other implementation manners of the present application, the pressing plate 110 is convexly disposed on one side of the rear mold plate 230 facing the springboard 240, that is, the groove 231 is not disposed on one side of the rear mold plate 230 facing the springboard 240, opposite surfaces of the two pressing plates 110 protrude relatively to form a protruding portion, a gap between the protruding portion and one side of the rear mold plate 230 facing the springboard 240 forms a clamping space, the protruding portion 122 of the slider 120 is embedded into the clamping space to realize sliding of the slider 120 between the two pressing plates 110, and in order to ensure tight fitting between the rear mold plate 230 and the springboard 240, a receiving groove (not shown in the figure) is disposed on one side of the springboard 240 facing the rear mold plate 230 and is matched with the pressing plates 110 and the slider 120, so that when the rear mold plate 230 and the springboard 240 are matched, the pressing plates 110 and the slider 120 can be embedded into the receiving groove.

In another implementation manner of the present application, referring to fig. 8, two positioning members 233 are convexly disposed at one end of the bottom surface of the groove 231, which is far away from the slider 120, and the positioning members 233 are arranged at intervals, in this embodiment, the positioning members 233 are screws, and the design of the positioning members 233 enables the slider 120 to move to the other end of the inner side of the groove 231 along the shifting block 130, so that when the slider 120 is tightly attached to the positioning members 233, the shifting block 130 is matched with the through hole 121 on the slider 120 without being separated.

Since the inclined guide portion 132 of the shifting block 130 is inclined in one direction, a critical value (critical state) when the slider 120 contacts the inclined guide portion 132 needs to be calculated, so that the shifting block 130 can be smoothly matched with the through hole 121 of the slider 120. The critical state is when the slider 120 moves to the other end inside the groove 231 (i.e. when the slider 120 is tightly attached to the positioning element 233), referring to fig. 4 and 9, when the mold opening is completed, the port of the through hole 121 at the end away from the jump board 240 is flush with the end surface of the inclined guide portion 132 at the end away from the jump board 240, and at this time, the slider 120 and the inclined guide portion 132 of the shift block 130 are in the critical state, and beyond the critical state, the slider 120 falls off from the shift block 130, so that the core pulling structure 100 of the two-color mold loses the core pulling function, which is the critical value of the moving distance of the rear mold 230 when the mold opening is performed, and then the mold closing is performed, and the shift block 130 and the slider 120 will slowly return under the inclination of the inclined guide portion 132 of the shift block 130 only from the critical value. And the shifting block 130 has a stroke limit that the shifting block can not be separated from the sliding block 120, so that the sliding block 120 can repeatedly and continuously move in the groove 231 of the rear template 230 in the opening and closing process of the rear template 230 and the springboard 240.

In a preferred implementation manner of the present application, referring to fig. 1, fig. 3, fig. 8 and fig. 9, the slider 120 is far away from the end surface of one end of the positioning element 233, the elastic elements 123 are arranged at intervals, the elastic elements 123 are springs, the elastic elements 123 are far away from the end surface of one end of the slider 120, the end of the slider 120 abuts against the inner wall of the groove 231, the elastic elements 123 correspond to the positioning element 233, and the elastic elements 123 push and force the slider 120 and the positioning element 233 to be aligned and tightly attached, so as to ensure that the slider 120 and the shifting block 130 are in the critical state but do not exceed the critical state.

The structure of the product 300 injection molded by the two-color mold 200 is shown in fig. 14, the inside of the product 300 has an undercut structure, the two-color mold 200 needs to use the inner slide 221 disposed in the rear mold 220 to form a glue position required for the undercut structure, referring to fig. 11, 12, and 15, the inner slide 221 and the product 300 are disengaged by a driving force from a shovel base 241, the shovel base 241 is fixed on a jump board 240, the inner slide 221, a rear mold core (not shown) on the rear mold 230, and the rear mold 230 form a movable assembly on the rear mold side of the two-color mold 200, and the movable assembly moves toward the front mold 210 of the two-color mold 200 and simultaneously moves toward one direction by shifting the inner slide 221 under the inclined guide rail of the shovel base 241, and finally the inner slide 221 and the product 300 are disengaged successfully.

The structure of the dual-color mold 200 meeting the aforementioned tripping requirement needs to enable a movable assembly composed of the inner slide 221, the rear mold core and the rear mold plate 230 to have a driving force moving towards the direction of the front mold 210 when the mold is opened by injection molding, in order to provide the driving force, the present application is implemented by adding the ejector rod 222 in the rear mold 220, specifically, referring to fig. 11 and 12, the ejector rod 222 sequentially passes through the rear mold plate 230 and the jumper plate 240 and is connected with the ejector plate 250, wherein the ejector plate 250 includes an upper ejector plate 251 and a lower ejector plate 252, the upper ejector plate 251 and the lower ejector plate 252 are stacked, the ejector rod 222 passes through the upper ejector plate 251 and is connected with the lower ejector plate 252, the upper ejector plate 251 and the jumper plate 240 are arranged at intervals, the ejector rods 140 are fixedly connected with the upper ejector plate 251, when the dual-color mold 200 executes an ejection command, the ejector rod 222 drives the lower ejector plate 252, the upper ejector plate 251, the ejector rod 140 and the rear mold plate 230 to move towards the direction of the front mold 210, so as to provide a driving force for the movable assembly to move towards the direction of the front mold 210 when the mold is opened, and the ejector rod 140 can be used as an auxiliary ejector rod 222.

As a preferable mode, referring to fig. 11 and 12, a spring 223 is sleeved on the ejector pin 222, one end of the spring 223 is in contact with one surface of the upper ejector pin plate 251 facing the springboard 240, and the other end of the spring 223 penetrates through the springboard 240 and is in contact with one surface of the rear template 230 facing the springboard 240, so that the ejector pin 222 is protected by the use of the spring 223, and a certain force effect can be achieved, thereby ensuring that the two-color mold 200 can be produced safely and stably.

The ejector 140 is used as an aid and can move along with the upper ejector plate 251 to lift the rear mold plate 230, as shown in fig. 6-8 and 9, the middle part of the inner wall of the groove 231 abutting against the elastic member 123 protrudes in a direction away from the slider 120 to form a protruding part 234, the protruding part 234 is in the shape of a groove body and is communicated with the inner side of the groove 231, the protruding part 234 is formed on one surface of the rear mold plate 230 facing the springboard 240, and the protruding part 234 forms an avoiding groove 235 for the ejector 140 to extend into. In the mold clamping state, since the slider 120 covers a part of the opening of the avoiding groove 235 and the lift pins 140 contact the bottom surface of the slider 120, the lift pins 140 do not extend into the avoiding groove 235. In the mold opening state, since the slider 120 slides to the other end (the end far from the protrusion 234) inside the groove 231 along the pressing plate 110, the opening end of the avoiding groove 235 is completely exposed, as the upper ejector plate 251 drives the ejector rod 140 to ascend, one end of the ejector rod 140 far from the upper ejector plate 251 extends into the avoiding groove 235 and abuts against the bottom surface of the avoiding groove 235, as the ejector rod 222 drives the upper ejector plate 251 to continue the above, the ejector rod 140 performs a second ejection stroke on the rear mold 230 under the driving of the upper ejector plate 251 to eject the rear mold 230, so as to provide a part of driving force for mold opening of the rear mold 230.

When the sliding block 120 is tightly attached to the positioning member 233, the push rod 140 extends into the avoiding groove 235, and as shown in fig. 3 and 9, a gap exists between the push rod 140 and the sliding block 120.

Referring to fig. 5, 11 and 12, the double-color mold 200 further includes a turntable 201 and two modules disposed on the turntable 201 at intervals, each module includes a front mold 210 and a rear mold 220, two double-color mold core pulling structures 100 are disposed in each rear mold 220, the two double-color mold core pulling structures 100 are located outside two ends of a rear mold core of the rear mold plate 230, and the inclination directions of the dial blocks 130 of the two double-color mold core pulling structures 100 are opposite, so as to match with the action of rotating the rear mold 220 of the double-color mold 200 by 180 degrees and then injecting another color plastic material.

The foregoing describes in detail a dual-color mold core pulling structure and a dual-color mold provided in an embodiment of the present application, and a specific example is applied in the description to explain the principle and the implementation manner of the present application, and the description of the foregoing embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A core pulling structure of a double-color mold is arranged in a rear mold of the double-color mold, the rear mold comprises an ejector plate, a springboard and a rear mold plate which are sequentially arranged along the mold opening direction of the double-color mold, and is characterized in that,

the double-color mold core-pulling structure comprises:

the sliding block is arranged on one surface, facing the springboard, of the rear template, a clamping space is formed on one surface, facing the springboard, of the rear template, two opposite side edges of the sliding block are slidably embedded in the clamping space, and a through hole is formed in the sliding block;

the poking block is arranged on the springboard and provided with an inclined guide part which penetrates through a through hole of the sliding block and is in sliding fit with the sliding block, a groove hole matched with the inclined guide part is formed in one surface, facing the springboard, of the rear template, and the inclined guide part penetrates through one end of the through hole and extends into the inner side of the groove hole;

the ejector rod is arranged along the die opening direction, one end of the ejector rod is connected with the ejector plate, and the other end of the ejector rod penetrates through the springboard and is abutted against one surface, facing the springboard, of the sliding block;

in the die opening process, the rear die plate drives the sliding block to slide from one end of the clamping space to the other end of the clamping space along the inclined guide part of the shifting block, the ejector plate drives the ejector rod to eject, the ejector rod is abutted against one surface, facing the springboard, of the sliding block in a first ejection stroke to eject the sliding block, and the ejector rod is separated from the sliding block in a second ejection stroke and abutted against one surface, facing the springboard, of the rear die plate to eject the rear die plate.

2. The two-color mold core pulling structure according to claim 1, wherein two pressing plates are convexly arranged on one side of the rear mold plate facing the springboard, a gap is reserved between the pressing plates and one side of the rear mold plate facing the springboard to form the clamping space, and two opposite ends of the sliding block are respectively slidably embedded into the clamping space;

one surface of the springboard facing the rear template is provided with a containing groove matched with the two pressing plates and the sliding block;

and in a matched die state, the two pressing plates and the sliding block are positioned in the accommodating groove.

3. The two-color mold core pulling structure according to claim 2, wherein a groove is formed in one surface of the rear mold plate facing the springboard, the two pressing plates are arranged on inner walls on two opposite sides of the groove at intervals, and the groove hole is formed in the middle of the bottom surface of the groove;

a gap is reserved between the pressing plate and the bottom surface of the groove to form the clamping space, a protruding part matched with the clamping space is convexly arranged on the side edge of the sliding block, the protruding part is inserted into the clamping space, and the sliding block is limited in the groove by the two pressing plates;

in a die assembly state, the slide block is positioned at one end of the inner side of the groove;

in the die opening process, the sliding block slides to the other end of the inner side of the groove from one end of the inner side of the groove along the inclined guide part.

4. The two-color mold core pulling structure according to claim 3, wherein in a mold closing state, at least one positioning piece is arranged at one end, far away from the sliding block, of the inner side of the groove;

in the die opening process, when the sliding block slides to the other end of the inner side of the groove, the sliding block is tightly attached to the positioning piece.

5. The two-color mold core pulling structure according to claim 4, wherein the shifting block comprises a connecting part and an inclined guide part which are sequentially arranged, and the shifting block is fixedly connected with the springboard through the connecting part;

in the die sinking process, when the sliding block slides to the other end of the inner side of the groove, the port of one end of the springboard is far away from the through hole, and the inclined guide part of the shifting block is far away from the end face of one end of the connecting part and is parallel and level.

6. The two-color mold core pulling structure according to claim 5, wherein at least one elastic member is disposed on an end surface of the sliding block away from the positioning member, and one end of the elastic member away from the sliding block abuts against an inner wall of the groove.

7. The two-color mold core pulling structure according to claim 6, wherein the middle part of the inner wall of the groove abutting against the elastic member protrudes in a direction away from the slider to form a protrusion, and the protrusion forms an avoiding groove for the ejector rod to extend into;

one end of the ejector rod, which is far away from the ejector pin plate, extends into the inner side of the avoiding groove in the second ejection stroke so as to push the rear template.

8. The two-color mold core pulling structure according to claim 7, wherein when the sliding block is closely attached to the positioning member, a gap exists between the ejector rod and the sliding block.

9. A double-color mold is characterized by comprising two rear molds which are arranged at intervals, wherein two double-color mold core pulling structures according to any one of claims 1 to 8 are arranged in each rear mold;

the two ends of the rear die core of the rear die are respectively provided with one double-color die core pulling structure, and the inclined directions of the inclined guide parts of the shifting blocks of the two double-color die core pulling structures are opposite.

10. The two-color mold according to claim 9, wherein the rear mold comprises a lower ejector plate, an upper ejector plate, a springboard and a rear mold plate which are arranged in sequence, and the lower ejector plate and the upper ejector plate are arranged in a laminated manner;

the rear mould also comprises an ejector rod, one end of the ejector rod is connected with the lower ejector plate, and the other end of the ejector rod sequentially penetrates through the upper ejector plate and the springboard and is inserted in the rear mould plate;

the ejector rod is sleeved with a spring, one end of the spring is abutted to one surface, facing the springboard, of the upper ejector pin plate, and the other end of the spring penetrates through the springboard and is abutted to one surface, facing the springboard, of the rear template.

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