CN117698058A - Zero-degree drawing injection mold - Google Patents

Abstract

The invention aims to provide a zero-degree drawing injection mold which comprises a fixed mold assembly, a movable mold assembly and a demolding assembly, wherein the fixed mold assembly comprises a fixed mold frame, a sliding plate and a male mold core, the sliding plate slides to lean against or be far away from the fixed mold frame, the male mold core is arranged on the fixed mold frame, the male mold core penetrates through the sliding plate, the movable mold assembly comprises a movable mold plate and a female mold core, the female mold core is arranged on one side surface of the movable mold plate, the sliding plate and the fixed mold frame are used for being sequentially buckled so that the female mold core, the male mold core and the sliding plate jointly enclose a mold cavity, the demolding assembly comprises a first linkage piece, a second linkage piece, a demolding plate and a plurality of ejector pins, the demolding plate is arranged in the fixed mold frame in a sliding mode, each ejector pin sequentially penetrates through the fixed mold frame and the male mold core, one end of each ejector pin is connected with the demolding plate, and the other end of each ejector pin extends to the surface of the male mold core, and the first linkage piece is respectively connected with the movable mold plate, the sliding plate and the fixed mold frame, and the second linkage piece is respectively connected with the movable mold plate and the demolding plate and the fixed mold frame.

Description

Zero-degree drawing injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a zero-degree drawing injection mold.

Background

The injection mold is used for producing and manufacturing plastic products, and can be divided into a movable mold and a fixed mold according to a motion state, wherein the fixed mold is a part fixedly arranged on the injection molding machine, and the movable mold is arranged on a driving shaft of the injection molding machine, so that the injection molding machine can complete mold closing when driving the movable mold to be buckled with the fixed mold, and can complete mold opening when being separated. When the movable die is buckled with the fixed die, a closed die cavity is formed between the movable die and the fixed die, molten plastic is injected into the die cavity, a plastic product consistent with the structural shape of the die cavity can be formed after cooling, and the plastic product can be taken out by driving the movable die to be far away from the fixed die by the injection molding machine.

In the past, the outer surfaces of the plastic products all have a certain gradient, and a certain draft angle is correspondingly formed on the die cavity of the die, so that the plastic products can be taken out smoothly from the die cavity, but with the increase of the demands of customers, people hope to obtain the plastic products with zero draft angle by an injection molding mode.

For example, chinese patent publication No. CN117021493a discloses a zero-degree drawing injection mold, which discloses a scheme for solving the problem of zero-degree drawing of plastic products, specifically, the zero-degree drawing injection mold comprises a male mold base and a female mold base, a guiding structure for guiding and matching is arranged between the male mold base and the female mold base, a male mold is installed on the male mold base, a female mold is installed on the female mold base, a mold cavity for zero-degree drawing is formed between the male mold and the female mold, an injection system for injecting into the mold cavity is arranged at the female mold and the male mold, an injection pore-forming structure for assisting in injection pore-forming is arranged on the female mold base, the male mold comprises a mold core main body, a first cog, a second cog, a supporting plate, a plurality of auxiliary rods, a hooking block and a power shaft, the auxiliary rods are respectively fixed with the male mold base, the supporting plate is fixed at the end parts of the auxiliary rods, the mold core main body is embedded and clamped in the supporting plate, the first cog and the second cog are respectively in sliding connection with the mold core main body, an internal groove for recovering the first cog and the second cog is formed in the mold core main body, the hook block is in sliding connection with the male mold base, the hooking block is fixed on the first cog and the power shaft is pulled out from the power block when the power block is pulled out from the first power block and pulled out from the power block to the power main body when the power block is pulled to the power block. Therefore, after the die is opened, the power shaft drives the hooking block to pull the die core main body to separate from the female die, the first embedded block and the second embedded block are mutually close to each other and generate a demoulding angle when the die core main body is pulled out, so that the problem that products are pulled out by a gap between products and the female die is solved due to the fact that products are left in the female die after the die is opened and products are pulled out by using the mechanical arm is solved.

However, the existing zero-degree drawing die has the following problems: the power shaft drives the hooking block to pull the mold core main body to separate, so that the first embedded block and the second embedded block are mutually close to each other and generate a demolding angle when the mold core main body is pulled out. It should be noted that the plastic product is still left in the female mold at this time, the plastic product is taken out from the female mold by means of the mechanical arm after being cooled and shrunk, however, because the female mold is the female mold, that is, the plastic product is still embedded in the female mold at this time, whether the female mold is in a zero-degree mold drawing structure is not disclosed in the prior art, when the female mold is in a zero-degree mold drawing structure, the side wall surface of the plastic product is parallel to the opening and closing directions of the male mold and the female mold, so that the shrinkage of the plastic product is limited, particularly when the plastic product has a certain thickness, the cooling shrinkage variation is smaller, and the zero-degree mold drawing of the plastic product on the vertical side surface can not be ensured to be smoothly realized from the female mold in the prior art. In summary, the technical problem that the plastic product realizes zero-degree drawing is not actually solved in the prior art, and in order to solve the technical problem, the zero-degree drawing injection mold of the application is provided.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a zero-degree drawing injection mold for realizing a zero-degree drawing angle of a plastic product.

The aim of the invention is realized by the following technical scheme:

a zero degree draft injection mold comprising:

the fixed die assembly comprises a fixed die frame, a sliding plate and a male die core, wherein the sliding plate slides to lean against or be far away from the fixed die frame, the male die core is arranged on the fixed die frame, and the male die core is arranged on the sliding plate in a penetrating manner;

the movable die assembly comprises a movable die plate and a female die core, the female die core is arranged on one side surface of the movable die plate, and the movable die plate, the sliding plate and the fixed die frame are used for being buckled in sequence so as to enable the female die core, the male die core and the sliding plate to jointly enclose a die cavity;

the demolding assembly comprises a first linkage piece, a second linkage piece, a demolding plate and a plurality of ejector pins, wherein the demolding plate is arranged in the fixed mold frame in a sliding manner, each ejector pin sequentially penetrates through the fixed mold frame and the male mold core, one end of each ejector pin is connected with the demolding plate, the other end of each ejector pin extends to the surface of the male mold core, the first linkage piece is respectively connected with the movable mold plate, the sliding plate and the fixed mold frame, and the second linkage piece is respectively connected with the movable mold plate, the demolding plate and the fixed mold frame;

when the movable die assembly is separated from the fixed die assembly, the movable die plate drives the sliding plate to synchronously slide through the first linkage piece, so that the male die core is pulled out of the female die core, then the movable die plate slides relative to the sliding plate through the first linkage piece, so that the plastic product is pulled out of the female die core, then the movable die plate drives the demolding plate to synchronously slide through the second linkage piece, so that each thimble ejects the plastic product from the sliding plate, and finally the movable die plate is completely separated from the sliding plate through the second linkage piece.

Optionally, the cover half frame includes fixed die holder, push pedal and two backup pads, two the backup pads set up respectively in the both sides of fixed die holder, the push pedal sets up in two backup pads, so that the push pedal with form the drawing of patterns interval between the cover half seat, the push pedal is kept away from be provided with a plurality of guide posts on the side of drawing of patterns interval, each the guide post wears to locate respectively the board that slides, so that the board that slides is close to or keeps away from the push pedal.

Optionally, the first linkage piece includes fixture block, briquetting, bulge and ejection spring, bulge slip set up in on the lateral wall of sliding plate, ejection spring respectively with bulge reaches the sliding plate looks butt, ejection spring is used for the ejector pin bulge, so that the partial structure of bulge follows the lateral wall of sliding plate stretches out, the one end of fixture block set up in on the lateral wall of movable mould board, the other end of fixture block extends to the push pedal, the draw-in groove has been seted up on the fixture block, the draw-in groove is used for the joint bulge, the one end of briquetting sets up in the push pedal, the other end of briquetting extends to the sliding plate, set up oblique roof on the briquetting, the movable mould board with when sliding plate looks synchronous slip is kept away from the push pedal, so that oblique roof wall pushes up the bulge, and then makes the bulge is kept away from the draw-in groove.

Optionally, one of the clamping block and the pressing block is provided with a sliding groove, and the other one is arranged in the sliding groove in a sliding way.

Optionally, the structure of the second linkage is identical to the structure of the first linkage.

Optionally, the male die core includes a male die core and a plurality of inclined inserts, the male die core set up in on the push pedal, each inclined insert all in proper order oblique wear in the push pedal reaches the male die core, and each inclined insert's one end all with stripper plate sliding connection, each inclined insert's the other end all extends to the lateral wall of male die core.

Optionally, the oblique insert comprises a sliding seat, a sliding block and an oblique jacking block, wherein the sliding seat is arranged on the stripper plate, the sliding block is arranged on the sliding seat in a sliding manner, the oblique jacking block sequentially obliquely penetrates through the push plate and the male die core, one end of the oblique jacking block is rotationally connected with the sliding block, and the other end of the oblique jacking block extends to the side wall of the male die core.

Optionally, the fixed die frame further comprises a glue injection hot runner, and the glue injection hot runner sequentially penetrates through the fixed die base and the push plate to extend into the male die core.

Optionally, the movable mould assembly further comprises a panel, an inclined drawing block and an inclined insert, wherein the panel is arranged on the side, away from the die core, of the movable mould plate along the normal sliding direction of the movable mould plate, the inclined drawing block is arranged on one side, close to the movable mould plate, of the panel, the inclined insert obliquely penetrates through the die core, one end of the inclined insert is in sliding connection with the inclined drawing block, and the other end of the inclined insert extends to the side, close to the die core, of the die core.

Optionally, the movable mould assembly further comprises a mould opening spring, and the mould opening spring is respectively abutted with the panel and the movable mould plate.

Compared with the prior art, the invention has at least the following advantages:

1. the male die core is firstly pulled out of the plastic product through the first linkage piece, so that the plastic product is cooled and contracted, the outer side wall of the plastic product is separated from the female die core, and then the female die core is withdrawn from the plastic product under the action of the first linkage piece; then under the action of the second linkage piece, the ejector pin and the plastic product are jointly separated from the sliding plate, and finally under the action of the second linkage piece, the plastic product is ejected out by the ejector pin, and the movable die assembly and the fixed die assembly are thoroughly separated, so that the mechanical arm of the injection molding machine can directly take down the plastic product. Therefore, the plastic product can be ensured to be stably and reliably extracted from the female die core, and the outer side wall of the plastic product can be pulled out at zero degree.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a zero degree draft injection mold according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a stationary mold assembly and a mold release assembly according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the stationary mold assembly and the stripper assembly shown in FIG. 2;

FIG. 4 is a schematic diagram of a movable mold assembly according to an embodiment of the present invention;

FIG. 5 is a schematic view of a partial structure of the zero degree draft injection mold shown in FIG. 1;

FIG. 6 is a schematic structural view of a first linkage according to an embodiment of the present invention;

FIG. 7 is a schematic view of a first linkage according to another embodiment of the present invention;

FIG. 8 is a schematic diagram of a male mold insert according to an embodiment of the present invention;

FIG. 9 is a schematic view of the structure of an insert according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a linkage rod and a detent block according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of the movable mold assembly shown in FIG. 4;

FIG. 12 is a schematic view of the structure of an oblique block and an oblique insert according to an embodiment of the present invention;

FIG. 13 is a schematic cross-sectional view of an opening spring according to an embodiment of the present invention;

FIG. 14 is a schematic structural view of a plastic product according to an embodiment of the present invention;

fig. 15 is a schematic cross-sectional view of the plastic product shown in fig. 14.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present invention will be understood by those of ordinary skill in the art according to specific circumstances.

As shown in fig. 1 to 4, a zero-degree drawing injection mold 10 comprises a fixed mold assembly 100, a movable mold assembly 200 and a demolding assembly 300, wherein the fixed mold assembly 100 comprises a fixed mold frame 110, a sliding plate 120 and a male mold core 130, the sliding plate 120 slides to lean against or be far away from the fixed mold frame 110, the male mold core 130 is arranged on the fixed mold frame 110, the male mold core 130 penetrates through the sliding plate 120, the movable mold assembly 200 comprises a movable mold plate 210 and a female mold core 220, the female mold core 220 is arranged on one side surface of the movable mold plate 210, and the movable mold plate 210, the sliding plate 120 and the fixed mold frame 110 are used for surrounding a mold cavity together when being sequentially buckled; the demolding assembly 300 comprises a first linkage member 310, a second linkage member 320, a demolding plate 330 and a plurality of ejector pins 340, wherein the demolding plate 330 is slidably arranged in the fixed mold frame 110, each ejector pin 340 sequentially penetrates through the fixed mold frame 110 and the male mold core 130, one end of each ejector pin 340 is connected with the demolding plate 330, the other end of each ejector pin 340 extends to the surface of the male mold core 130, the first linkage member 310 is respectively connected with the movable mold plate 210, the sliding plate 120 and the fixed mold frame 110, the second linkage member 320 is respectively connected with the movable mold plate 210, the demolding plate 330 and the fixed mold frame 110, when the movable mold assembly 200 is separated from the fixed mold assembly 100, the movable mold plate 210 firstly drives the sliding plate 120 to synchronously slide through the first linkage member 310, so that the male mold core 130 is pulled out of the female mold core 220, then the movable mold plate 210 slides relative to the sliding plate 120 through the first linkage member 310, so that a plastic product is pulled out of the female mold core 220, and then the movable mold plate 210 drives the demolding plate 330 through the second linkage member 320 to synchronously slide so that each ejector pin 340 ejects the plastic product out of the sliding plate 120 from the sliding plate 120, and finally the movable mold plate 210 is completely separated from the sliding plate 120 through the second linkage member 320.

It should be noted that, the fixed mold assembly 100 and the movable mold assembly 200 are used for being buckled with each other or being separated from each other. When mutually buckled, the plastic product is used for injection molding, and when mutually separated, the plastic product is ejected and demoulded by the demoulding assembly 300. Specifically, the sliding plate 120 can slide relative to the fixed mold frame 110 to approach or separate from the fixed mold frame 110, and when the sliding plate 120 approaches the fixed mold frame 110, the sliding plate 120 and the fixed mold frame 110 can be buckled by overlapping each other. The male die insert 130 is mounted on the fixed die frame 110, and the male die insert 130 passes through the sliding plate 120. The female mold core 220 is mounted on the lower side of the movable mold plate 210, when the movable mold plate 210, the sliding plate 120 and the fixed mold frame 110 are sequentially stacked together, the inner side wall of the female mold core 220, the outer side wall of the male mold core 130 and the part of the sliding plate 120, which is close to the male mold core 130, are surrounded to form a closed mold cavity, and when the injection molding machine injects molten plastic into the mold cavity, plastic products with corresponding shapes and structures can be formed in the mold cavity. Further, the stripper plate 330 is slidably mounted in the fixed mold frame 110, and the stripper plate 330 and the sliding plate 120 are parallel to each other, and the sliding direction of the stripper plate 330 and the sliding plate 120 is the same with respect to the fixed mold frame 110. One end of the ejector pin 340 is connected with the stripper plate 330, and the other end of the ejector pin 340 sequentially passes through the fixed die frame 110 and the male die core 130 to extend to the surface of the male die core 130, so that when the stripper plate 330 slides relative to the sliding plate 120 or the male die core 130, the ejector pin 340 can protrude from the surface of the male die core 130.

The demolding process of the plastic product of the zero-degree draft injection mold 10 is described below. The first linkage 310 is connected to the movable mold plate 210, the sliding plate 120 and the fixed mold frame 110, respectively, and the second linkage 320 is connected to the movable mold plate 210, the stripper plate 330 and the fixed mold frame 110, respectively. In this way, when the zero-degree draft injection mold 10 in the mold closed state is opened, first, the movable platen 210, the slide plate 120, and the fixed mold frame 110 are in a state of being engaged with each other. As the movable mold plate 210 drives the female mold core 220 to move away from the fixed mold frame 110, the movable mold plate 210 and the sliding plate 120 are kept in the fastening state under the fastening action of the first linkage member 310, so that the sliding plate 120 and the fixed mold frame 110 are separated by a certain distance, and in this process, the stripper plate 330 and the ejector pins 340 are both in a fixed state relative to the sliding plate 120, that is, the stripper plate 330 and the ejector pins 340 slide along with the sliding plate 120 relative to the fixed mold frame 110. Because the male die core 130 is fixedly installed on the top surface of the fixed die frame 110, the distance between the male die core 130 and the female die core 220 is equal, and the plastic product and the ejector pins 340 are all left in the female die core 220. Thus, as the male mold core 130 is far away from the plastic product, one side of the plastic product near the male mold core 130 is cooled and contracted, so that the other side of the plastic product is separated from the female mold core 220. After the male mold core 130 is pulled out by a certain distance, that is, after the female mold core 220 drives the plastic product to move away from the male mold core 130 by a certain distance, the first linkage member 310 no longer clamps the movable mold plate 210 and the sliding plate 120 together, so that the movable mold plate 210 slides away from the sliding plate 120, that is, the movable mold plate 210 slides away from the sliding plate 120 and each thimble 340, and as the plastic product is still connected with the sliding plate 120 and the thimble 340, the plastic product is pulled out from the female mold core 220 along with the movable mold plate 210 being away from the female mold core. Then, under the action of the second linkage 320, the movable mold 210 and the stripper plate 330 slide synchronously relative to the sliding plate 120, so that each ejector pin 340 pushes the plastic product to slide a certain distance relative to the sliding plate 120, so that the plastic product is separated from the sliding plate 120, and the plastic product is only pushed by each ejector pin 340. Finally, after the second linkage 320 no longer clamps the movable mold plate 210 and the stripper plate 330 together, the movable mold plate 210 is far away from the stripper plate 330, i.e. the movable mold plate 210 is completely separated from the sliding plate 120, exposing the plastic product held only by the ejector pins 340. At this time, the mechanical arm on the injection molding machine can smoothly take away the plastic product. Thus, compared with the existing injection mold, the zero-degree drawing injection mold 10 of the present application can ensure that the plastic product is stably and reliably pulled out from the female mold core 220 at a zero-degree drawing angle after the mold is opened.

As shown in fig. 1, in an embodiment, the fixed mold frame 110 includes a fixed mold base 111, a push plate 112, and two support plates 113, the two support plates 113 are respectively disposed on two sides of the fixed mold base 111, the push plate 112 is disposed on the two support plates 113, so that a demolding interval is formed between the push plate 112 and the fixed mold base 111, a side surface of the push plate 112, which is far away from the demolding interval, is provided with a plurality of guide posts 114, and each guide post 114 is respectively disposed through the sliding plate 120, so that the sliding plate 120 slides close to or far away from the push plate 112.

The die holder 111, the push plate 112, and the two support plates 113 are all plate-type structures. Wherein two support plates 113 are respectively fixedly mounted on two opposite sides of the fixed die holder 111 through bolts, so that a space is provided between the two support plates 113, and then the push plate 112 is mounted on the side surface of the support plate 113 away from the fixed die holder 111, so that the push plate 112 and the fixed die holder 111 are in a mutually parallel structure. Further, a plurality of guide posts 114 are fixedly mounted on the push plate 112 such that each guide post 114 passes through the sliding plate 120, thus enabling the sliding plate 120 to slide closer to or farther from the push plate 112. For example, a plurality of guide sleeves are mounted on the sliding plate 120 such that the guide posts 114 fit through the guide sleeves, enabling the sliding plate 120 to slide stably relative to the push plate 112. In an embodiment, a plurality of guide posts are further installed between the fixed mold base 111 and the push plate 112, and each guide post passes through the stripper plate 330, so that the stripper plate 330 can reliably and stably slide back and forth between the fixed mold base 111 and the push plate 112. In an embodiment, in order to ensure that the sliding plate 120 has a maximum sliding distance with respect to the push plate 112, a countersunk hole is formed in a side of the push plate 112 away from the sliding plate 120, wherein a depth of the countersunk hole is set according to the maximum sliding distance of the sliding plate 120 with respect to the push plate 112, and then a bolt is threaded onto the sliding plate 120 after passing through the countersunk hole, so that the sliding plate 120 can be prevented from sliding away after sliding a certain distance with respect to the push plate 112, i.e. has a maximum sliding distance interval.

As shown in fig. 5 and 6, in an embodiment, the first linkage member 310 includes a clamping block 311, a pressing block 312, a protruding block 313 and an ejection spring 314, the protruding block 313 is slidably disposed on a side wall of the sliding plate 120, the ejection spring 314 is respectively abutted against the protruding block 313 and the sliding plate 120, the ejection spring 314 is used for ejecting the protruding block 313, so that a part of the structure of the protruding block 313 protrudes from the side wall of the sliding plate 120, one end of the clamping block 311 is disposed on the side wall of the movable mold plate 210, the other end of the clamping block 311 extends to the push plate 112, a clamping groove 3111 is formed in the clamping block 311, the clamping groove 3111 is used for clamping the protruding block 313, one end of the pressing block 312 is disposed on the push plate 112, the other end of the pressing block 312 extends to the sliding plate 120, and an inclined top wall 3121 is formed in the pressing block 312, when the movable mold plate 210 and the sliding plate 120 synchronously slide away from the push plate 112, so that the inclined top wall 3121 pushes the protruding block 313, and the protruding block 313 is further away from the clamping groove 3111.

It should be noted that, a void-avoiding groove is formed on the side wall of the sliding plate 120, the protruding block 313 is clamped in the void-avoiding groove by a bolt, so that the protruding block 313 can extend or retract along the void-avoiding groove, the ejection spring 314 is installed in the void-avoiding groove, so that the ejection spring 314 is respectively abutted against the protruding block 313 and the bottom wall of the void-avoiding groove, and thus, under the elastic thrust of the ejection spring 314, the protruding block 313 is in a state protruding from the side wall of the sliding plate 120 in a natural state, and when pressure is applied to the protruding block 313, the protruding block 313 compresses the ejection spring 314, so that the protruding block 313 is completely retracted into the side wall of the sliding plate 120. One end of the clamping block 311 is mounted on the side wall of the movable mold plate 210 through a bolt, and the clamping block 311 is provided with a clamping groove 3111, so that the side wall of the clamping groove 3111 clamps the protruding block 313, and when the movable mold plate 210 slides away from the push plate 112, the movable mold plate 210 and the sliding plate 120 slide away from the push plate 112 simultaneously under the cooperation of the clamping groove 3111 and the protruding block 313. One end of the pressing block 312 is mounted on the push plate 112 through a bolt, and an inclined top wall 3121 is formed on the pressing block 312, when the movable mold plate 210 and the sliding plate 120 synchronously slide away from the push plate 112, the protruding block 313 passes through the inclined top wall 3121, and since the inclined top wall 3121 is of an inclined surface structure, the inclined top wall 3121 gradually presses the protruding block 313 into the side wall of the sliding plate 120, so that the protruding block 313 is not clamped with the clamping groove 3111, and thus, the movable mold plate 210 and the sliding plate 120 are not synchronous. In this way, under the action of the first linkage element 310, after the movable mold plate 210 and the sliding plate 120 slide for a certain distance relative to the push plate 112, the movable mold plate 210 is separated from the sliding plate 120, so that the male mold core 130 is pulled out of the plastic product first, and then the plastic product is pulled out of the female mold core 220.

As shown in fig. 6 and 7, in one embodiment, one of the clamping block 311 and the pressing block 312 is provided with a sliding slot 3112, and the other is slidably disposed in the sliding slot 3112.

It should be noted that, since the latch 311 is used to push against the protrusion 313, the press block 312 is used to press the protrusion 313 into the sidewall of the sliding plate 120. In order to balance the force of the protrusion 313, one of the latch 311 and the press 312 is provided with a chute 3112, and the other slides along the chute 3112. Specifically, when the chute 3112 is located in the latch 311, the pressing block 312 is located inside the latch 311, the latch slot 3111 on the latch 311 is used to clamp the two ends of the protruding block 313, and the pressing block 312 is used to press the middle portion of the protruding block 313. When the chute 3112 is located at the pressing block 312, the clamping block 311 is located at the inner side of the pressing block 312, the clamping groove 3111 on the clamping block 311 clamps the middle position of the protruding block 313, and the pressing block 312 presses the two ends of the protruding block 313, so that the protruding block 313 is ensured to be balanced, and the pressing block 312 can be smoothly pressed into the side wall of the sliding plate 120. In one embodiment, the structure of the second linkage member 320 is identical to the structure of the first linkage member 310.

As shown in fig. 3, 14 and 15, in an embodiment, the male die core 130 includes a male die core 131 and a plurality of inclined inserts 132, the male die core 131 is disposed on the push plate 112, each inclined insert 132 sequentially penetrates through the push plate 112 and the male die core 131 in an inclined manner, one end of each inclined insert 132 is slidably connected with the stripper plate 330, and the other end of each inclined insert 132 extends to the side wall of the male die core 131.

It should be noted that, since the concave positions are generally formed on the inner side of the plastic product, in order to enable the male mold insert 130 to be smoothly drawn out from the female mold insert 220, that is, the male mold insert 130 is drawn out from the inner side of the plastic product, the male mold insert 130 is configured in a structure that the male mold insert 131 is combined with the plurality of diagonal inserts 132. Specifically, the male mold core 131 is mounted on the push plate 112 by bolts, and each of the diagonal inserts 132 passes through the push plate 112 and the male mold core 131 at a certain inclination angle, wherein one end of the diagonal insert 132 is located on the side wall of the male mold core 131, and the other end of the diagonal insert 132 is slidably connected with the stripper plate 330. When the movable mold plate 210 drives the sliding plate 120 to move away from the push plate 112, the movable mold plate 210 and the sliding plate 120 serve as references, which is equivalent to that the push plate 112 drives the convex mold core 131 to withdraw from the female mold core 220, and the stripper plate 330 is clamped and fixed by the sliding plate 120 and the movable mold plate 210 together, so that the stripper plate 330 is integrated with the movable mold plate 210 and the sliding plate 120, and the bottom ends of the inclined mold inserts 132 are connected with the stripper plate 330, so that the inclined mold inserts 132 are forced to slide transversely relative to the convex mold core 131 along with the withdrawal of the convex mold core 131 from the female mold core 220, so that the top ends of the inclined mold inserts 132 are separated from the inner side of the plastic product, and the convex mold core 131 is withdrawn from the inner side wall 22 of the plastic product at the same time, so that the plastic product is only connected with the sliding plate 120, the ejector pins 340 and the female mold core 220.

As shown in fig. 3, 8 and 9, in one embodiment, the diagonal insert 132 includes a sliding seat 1321, a sliding block 1322 and a diagonal top block 1323, the sliding seat 1321 is disposed on the stripper plate 330, the sliding block 1322 is slidably disposed on the sliding seat 1321, the diagonal top block 1323 sequentially penetrates through the push plate 112 and the punch core 131, one end of the diagonal top block 1323 is rotatably connected with the sliding block 1322, and the other end of the diagonal top block 1323 extends to a sidewall of the punch core 131.

It should be noted that, the slide 1321 is mounted on the stripper plate 330 by a bolt, in an embodiment, a T-shaped slot 13211 is formed in the slide 1321, and the slide 1322 is in a T-shaped rail structure, where the T-shaped rail is adapted to the T-shaped slot, so that the slide 1322 can slide relative to the slide 1321. In one embodiment, the slider 1322 is provided with a circular groove 13221, and the bottom of the pitched roof block 1323 is provided with a cylinder 13231, where the cylinder 13231 is adaptively inserted into the circular groove 13221, so that the pitched roof block 1323 can rotate relative to the slider 1322. In this way, when male mold core 131 is withdrawn from female mold core 220, angled top block 1323 is forced to slide laterally relative to slide 1321. It should be emphasized that, according to the prior art oblique ejection structure, the corresponding T-shaped rail is directly disposed on the oblique ejection block 1323, and in this structure, the machining precision of the oblique ejection block 1323 needs to be high enough to ensure that the oblique ejection block 1323 can be adaptively and obliquely inserted into the punch core 131, and simultaneously, be adaptively installed with the T-shaped slot of the slide seat 1321. In this application, the slide block 1322 is disposed between the inclined top block 1323 and the slide seat 1321 as a middle connection structure, so that when the inclined top block 1323 is processed, only the adapting structure between the inclined top block 1323 and the male die core 131 needs to be considered, the adapting structure between the inclined top block 1323 and the slide seat 1321 is determined by the slide block 1322, and the inclined top block 1323 and the slide block 1322 can be rotated by a certain angle according to practical situations to complete the assembly. In this manner, the flexibility of the process between the angled roof block 1323 and the slide 1321 can be greatly increased.

As shown in fig. 2 and 10, in an embodiment, the demolding assembly 300 further includes a plurality of linkage rods 351 and a plurality of clamping blocks 352, one end of each linkage rod 351 is disposed on the demolding plate 330, the other end of each linkage rod 351 sequentially penetrates through the push plate 112 and the sliding plate 120, and each clamping block 352 is disposed on one end of each linkage rod 351 located on the sliding plate 120.

When the sliding plate 120 and the movable die plate 210 slide away from the push plate 112, the sliding plate 120 and the movable die plate 210 clamp the clamping blocks 352 together, so that the stripper plate 330 is kept in a relatively stationary state with respect to the sliding plate 120 and the movable die plate 210 by the linkage rods 351. Thus, as the male mold core 131 is pulled away from the female mold core 220, each of the inclined top blocks 1323 is forced to slide laterally relative to the stripper plate 330, so that the end of the inclined top block 1323 close to the female mold core 220 can be smoothly separated from the inner sidewall of the plastic product.

As shown in fig. 1 and 4, in an embodiment, the mold fixing frame 110 further includes a glue injection hot runner 115, and the glue injection hot runner 115 sequentially penetrates through the mold fixing frame 111, the stripper plate 330 and the push plate 112 to extend into the punch core 131.

It should be noted that, compare in traditional injecting glue system and drawing of patterns system and be located the cover half part and the movable mould part of mould respectively, this application is in order to realize the zero degree pattern drawing of plastic goods, consequently has set up injecting glue system and drawing of patterns system in the one side of cover half part. Specifically, in order to enable the plastic of the injection molding machine to smoothly flow into the mold cavity, one end of the injection hot runner 115 is disposed on the positioning seat 111, and the other end sequentially passes through the stripper plate 330 and the push plate 112, and finally extends into the male mold core 131. The non-contact structure is between the injection hot runner 115 and the stripper plate 330, and the contact fixing structure is between the injection hot runner 115 and the fixed mold base 111, the push plate 112, and the male mold core 131, so that the stripper plate 330 can slide relative to the injection hot runner 115. Second, the injection molding hot runner 115 can keep the plastic in a molten state all the time, and no condensate need be removed during injection molding.

As shown in fig. 4 and fig. 11 to fig. 15, in an embodiment, the movable mold assembly 200 further includes a panel 230, an inclined drawing block 240 and an inclined insert 250, the panel 230 is slidably disposed on a side of the movable mold plate 210 away from the female mold core 220 along a normal direction of the movable mold plate 210, the inclined drawing block 240 is disposed on a side of the panel 230 near the movable mold plate 210, the inclined insert 250 is obliquely threaded through the female mold core 220, one end of the inclined insert 250 is slidably connected with the inclined drawing block 240, and the other end of the inclined insert 250 extends to a side of the female mold core 220 near the male mold core 130.

It should be noted that, when the side groove 23 is formed on the outer sidewall of the plastic product 20, the above structure is provided to form the side groove 23. Specifically, the panel 230 and the movable die plate 210 are in a structure parallel to each other, for example, a guide bar is provided on the panel 230 such that the guide bar passes through the movable die plate 210, so that the panel 230 can slide close to or away from the movable die plate 210 with respect to a normal direction of the movable die plate 210. The inclined insert 250 obliquely passes through the female die core 220, so that one end of the inclined insert 250 extends to the inner side of the female die core 220, and the other end of the inclined insert 250 extends to the panel 230. The oblique drawing block 240 is mounted on the panel 230, and the oblique drawing block 240 is slidably connected with the oblique insert 250, so that when the panel 230 slides away from the die plate 210, the oblique drawing block 240 drives the oblique insert 250 to slide out from the die core 220, so that the oblique insert 250 is drawn away from the side groove 23 of the plastic product 20, and the subsequent plastic product 20 can be smoothly drawn out from the die core 220. In an embodiment, a T-shaped rail is also disposed on the oblique drawing block 240, and a T-shaped groove is disposed on the oblique insert 250, so that the T-shaped rail and the T-shaped groove are installed in an adaptive manner, wherein the T-shaped rail and the T-shaped groove are both of an oblique structure and, thus, when the oblique drawing block 240 slides to be far away from the movable mold plate 210, the T-shaped rail of the oblique structure can be decomposed into two component forces of a horizontal direction and a vertical direction, so that the T-shaped rail pushes against the inner side wall of the T-shaped groove, and the oblique insert 250 slides along the horizontal direction and the vertical direction to be drawn out from the female mold core 220.

As shown in fig. 13, in one embodiment, the movable mold assembly 200 further includes a mold opening spring 260, and the mold opening spring 260 is respectively abutted against the panel 230 and the movable mold plate 210.

When the mold is opened, in order to allow the tilt insert 250 to be first pulled out of the plastic product 20, an opening spring 260 is installed between the panel 230 and the movable die plate 210. The die opening springs 260 are respectively abutted against the panel 230 and the movable die plate 210. Thus, when the fixed mold assembly 100 is separated from the movable mold assembly 200, the movable mold plate 210, the sliding plate 120 and the pushing plate 112 are kept engaged with each other by the elastic pushing force of the mold opening spring 260, and the mold opening spring 260 pushes the panel 230, so that the panel 230 slides away from the movable mold plate 210, and the inclined drawing block 240 drives the inclined insert 250 to draw out from the female mold core 220. After the mold opening spring 260 is sprung to a maximum distance, the panel 230 drives the movable mold plate 210 away from the fixed mold assembly 100. In one embodiment, a plurality of mold opening springs 260 are provided, and each mold opening spring 260 is respectively abutted against the panel 230 and the movable mold plate 210.

In an embodiment, a structure equivalent to the linkage rod 351 and the clamping block 352 is also disposed between the panel 230 and the movable mold plate 210, so that the panel 230 can slide along the normal direction of the movable mold plate 210 for a certain distance and then be clamped, thereby preventing the panel 230 from falling off from the movable mold plate 210.

In an embodiment, two first linkage members 310 and two second linkage members 320 are disposed, and the two first linkage members 310 are respectively located on two opposite outer sidewalls of the movable mold plate 210, and the two second linkage members 320 are respectively located on the other two opposite outer sidewalls of the movable mold plate 210.

Further, in an embodiment, the movable mold plate 210, the sliding plate 120 and the pushing plate 112 are all installed with water channels, and the mold can be cooled rapidly by injecting cold water into the water channels.

As shown in fig. 2, in an embodiment, the sliding plate 120 includes a plate seat 121 and a sliding mold core 122, the plate seat 121 is slidably disposed on the push plate 121, and the sliding mold core 122 is disposed on the plate seat 121, so that the punch core 130 sequentially penetrates through the plate seat 121 and the sliding mold core 122. Thus, the sliding mold core 122, the male mold core 130 and the female mold core 220 together enclose a mold cavity.

As shown in fig. 14 and 15, in an embodiment, an included angle between the outer top surface 24 and the outer side surface 25 of the plastic product 20 is 90 °, so that when the plastic product 20 is drawn out from the female mold core 220, an included angle between the outer side surface 25 and the demolding direction is 0 °, and zero degree drawing of the plastic product 20 can be achieved through the zero degree drawing injection mold 10 of the present application.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A zero degree draft injection mold, comprising:

the fixed die assembly comprises a fixed die frame, a sliding plate and a male die core, wherein the sliding plate slides to lean against or be far away from the fixed die frame, the male die core is arranged on the fixed die frame, and the male die core is arranged on the sliding plate in a penetrating manner;

the movable die assembly comprises a movable die plate and a female die core, the female die core is arranged on one side surface of the movable die plate, and the movable die plate, the sliding plate and the fixed die frame are used for being buckled in sequence so as to enable the female die core, the male die core and the sliding plate to jointly enclose a die cavity;

the demolding assembly comprises a first linkage piece, a second linkage piece, a demolding plate and a plurality of ejector pins, wherein the demolding plate is arranged in the fixed mold frame in a sliding manner, each ejector pin sequentially penetrates through the fixed mold frame and the male mold core, one end of each ejector pin is connected with the demolding plate, the other end of each ejector pin extends to the surface of the male mold core, the first linkage piece is respectively connected with the movable mold plate, the sliding plate and the fixed mold frame, and the second linkage piece is respectively connected with the movable mold plate, the demolding plate and the fixed mold frame;

when the movable die assembly is separated from the fixed die assembly, the movable die plate drives the sliding plate to synchronously slide through the first linkage piece, so that the male die core is pulled out of the female die core, then the movable die plate slides relative to the sliding plate through the first linkage piece, so that the plastic product is pulled out of the female die core, then the movable die plate drives the demolding plate to synchronously slide through the second linkage piece, so that each thimble ejects the plastic product from the sliding plate, and finally the movable die plate is completely separated from the sliding plate through the second linkage piece.

2. The zero-degree drawing injection mold of claim 1, wherein the fixed mold frame comprises a fixed mold base, a push plate and two support plates, the two support plates are respectively arranged on two sides of the fixed mold base, the push plate is arranged on the two support plates so that a demolding interval is formed between the push plate and the fixed mold base, a plurality of guide posts are arranged on one side surface of the push plate away from the demolding interval, and each guide post is respectively penetrated through the sliding plate so that the sliding plate slides to be close to or far away from the push plate.

3. The zero-degree drawing injection mold of claim 2, wherein the first linkage piece comprises a clamping block, a pressing block, a protruding block and an ejection spring, the protruding block is slidably arranged on the side wall of the sliding plate, the ejection spring is respectively abutted against the protruding block and the sliding plate, the ejection spring is used for ejecting the protruding block, so that part of the structure of the protruding block extends out of the side wall of the sliding plate, one end of the clamping block is arranged on the side wall of the movable mold plate, the other end of the clamping block extends to the push plate, a clamping groove is formed in the clamping block and is used for clamping the protruding block, one end of the pressing block is arranged on the push plate, the other end of the pressing block extends to the sliding plate, an oblique top wall is formed in the pressing block, and the movable mold plate and the sliding plate synchronously slide away from the push plate, so that the oblique top wall ejects the protruding block, and further the protruding block is away from the clamping groove.

4. The zero draft injection mold of claim 3 wherein one of said block and said block defines a runner and the other is slidably disposed within said runner.

5. The zero draft injection mold of claim 3 or 4 wherein the structure of the second linkage is identical to the structure of the first linkage.

6. The zero-degree drawing injection mold of claim 2, wherein the male mold core comprises a male mold core and a plurality of inclined inserts, the male mold core is arranged on the push plate, each inclined insert sequentially penetrates through the push plate and the male mold core in an inclined mode, one end of each inclined insert is slidably connected with the stripper plate, and the other end of each inclined insert extends to the side wall of the male mold core.

7. The zero draft injection mold of claim 6, wherein the diagonal insert comprises a slide, a slide and a diagonal top block, the slide is disposed on the stripper plate, the slide is slidably disposed on the slide, the diagonal top block sequentially penetrates the push plate and the punch core in a diagonal manner, one end of the diagonal top block is rotatably connected with the slide, and the other end of the diagonal top block extends to the side wall of the punch core.

8. The zero draft injection mold of claim 6 wherein said stationary mold frame further comprises a hot runner for injecting glue, said hot runner for injecting glue passing through said stationary mold base and said push plate in sequence to extend into said male mold core.

9. The zero-degree drawing injection mold of claim 1, wherein the movable mold assembly further comprises a panel, an inclined drawing block and an inclined insert, the panel is slidably arranged on the side, away from the female mold core, of the movable mold plate along the normal direction of the movable mold plate, the inclined drawing block is arranged on one side, close to the movable mold plate, of the panel, the inclined insert obliquely penetrates through the female mold core, one end of the inclined insert is slidably connected with the inclined drawing block, and the other end of the inclined insert extends to the side, close to the male mold core, of the female mold core.

10. The zero draft injection mold of claim 9, wherein said movable mold assembly further comprises an opening spring, said opening spring abutting said panel and said movable mold plate, respectively.