CN218966038U

CN218966038U - Injection mold for molding special-shaped hole type cavity

Info

Publication number: CN218966038U
Application number: CN202223502895.8U
Authority: CN
Inventors: 方召; 方铨
Original assignee: Shenzhen Cares Plastic Electronics Co ltd
Current assignee: Shenzhen Cares Plastic Electronics Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-05
Anticipated expiration: 2032-12-26

Abstract

The application relates to an injection mold for molding a special-shaped hole cavity, which belongs to the field of injection molding of plastic products, is mainly applied to molding special-shaped holes which are arranged on the outer surface of a product in a vertical demolding direction and realizes the effect of quick demolding, and comprises an injection upper mold and an injection lower mold which are oppositely arranged, wherein a fixed cavity is formed by the injection upper mold and the injection lower mold; the injection upper die comprises a special-shaped insert positioned in the fixed cavity, a special-shaped hole arranged on the outer surface of the product in a vertical demolding direction, and a sliding driving piece capable of driving the special-shaped insert to slide back and forth, so that the special-shaped insert can slide in a direction away from the fixed cavity to make space free for demolding of a molded product conveniently.

Description

Injection mold for molding special-shaped hole type cavity

Technical Field

The application relates to the field of injection molding of plastic products, in particular to an injection mold for molding a special-shaped hole type cavity.

Background

The injection mold is a tool for producing plastic products, is also a tool for endowing the plastic products with complete structures and precise dimensions, and belongs to important technological equipment for producing various industrial products. Injection molding is a processing method used for mass production of parts with complex shapes, and specifically refers to a method for injecting heated and melted plastic into a fixed cavity by an injection molding machine under high pressure, and obtaining a formed product after cooling and solidifying.

The injection mold in the related technical means generally comprises an injection upper mold installed on a top driving source of the injection machine and an injection lower mold installed on a jacking driving source of the injection machine, wherein the injection upper mold and the injection lower mold are oppositely arranged and can move relatively. The injection molding upper die comprises an upper die frame and an upper die core assembly fixedly arranged on the upper die frame, the injection molding lower die comprises a lower die frame and a lower die core assembly fixedly arranged on the lower die frame, and the upper die core assembly and the lower die core assembly form a shaping cavity for injection molding together. The injection upper die is also provided with a glue injection nozzle used for communicating with the injection molding machine to inject plastic and a glue injection runner used for guiding the plastic to the shaping cavity to form a molded product by injection molding. The plastic in the injection molding machine flows in through the glue injection nozzle, and then is injected into the fixed cavity through the guide flow of the glue injection runner to form a product.

For the related technical means, when the product is provided with the special-shaped hole, an insert corresponding to the special-shaped hole is generally arranged in the injection upper die or the injection lower die. When the setting direction of the insert is perpendicular to the demolding direction of the product, the problem of inconvenient demolding of the product due to blocking of the insert exists.

Disclosure of Invention

In order to improve the problem that when the setting direction of the insert is perpendicular to the demolding direction of the product, the demolding of the product is inconvenient due to the blocking of the insert, the application provides an injection mold for molding a special-shaped hole cavity.

The application provides an injection mold for special-shaped hole cavity molding, adopts following technical scheme.

An injection mold for molding a special-shaped hole cavity, comprising:

the upper injection mold comprises an upper mold frame and an upper mold core assembly;

the lower injection mold comprises a lower mold frame and a lower mold core assembly;

the upper injection mold and the lower injection mold are arranged oppositely, the upper mold core component and the lower mold core component form a shaping cavity for injection molding together, and the upper injection mold is provided with a glue injection nozzle for communicating an injection molding machine to inject plastic and a glue injection runner for guiding the plastic to the shaping cavity; the injection molding upper die further comprises a special-shaped insert and a sliding driving piece, wherein the special-shaped insert and the sliding driving piece are perpendicular to the demolding direction, and the special-shaped insert is arranged in the shaping cavity and can slide towards the direction close to or far away from the shaping cavity under the driving of the sliding driving piece.

By adopting the technical scheme, the plastic flows from the glue injection nozzle to the fixed cavity through the glue injection runner, so that a formed product is formed by injection molding, and the special-shaped insert is arranged in the fixed cavity in the vertical demoulding direction, so that a special-shaped hole which is arranged on the outer surface of the product in the vertical demoulding direction can be formed; the sliding driving piece can drive the special-shaped insert to slide back and forth along the vertical demolding direction, and when the special-shaped insert slides towards the direction far away from the shaping cavity, the space can be vacated to facilitate demolding of products in the shaping cavity.

Optionally, the sliding driving piece comprises a clamping sliding block fixedly arranged with the special-shaped insert and an insert driving oil cylinder for driving the clamping sliding block to horizontally slide towards a direction close to or far from the shaping cavity; the upper die core assembly comprises an upper die core mounting plate which is spliced with the injection lower die in a butt joint way, the insert driving oil cylinder is fixedly arranged with the upper die core mounting plate, and the clamping sliding block is slidably arranged on the upper die core mounting plate and is positioned outside the shaping cavity.

By adopting the technical scheme, the insert driving oil cylinder is fixedly arranged on the upper mold core mounting plate and can drive the clamping sliding block to slide in the direction close to or far away from the fixed cavity, so that the special-shaped insert can be driven to slide in the direction far away from the fixed cavity to vacate space for facilitating product demoulding; the insert driving oil cylinder and the special-shaped insert are driven by the clamping sliding block, so that the stroke of the insert driving oil cylinder can be reduced, and the sliding efficiency can be improved.

Optionally, a nut clamping groove is formed in one end, close to the insert driving oil cylinder, of the clamping slider, and a fastening nut which is clamped and installed in the nut clamping groove in the vertical direction is arranged at the end of the push rod of the insert driving oil cylinder.

By adopting the technical scheme, the fastening nut is arranged at the end part of the push rod of the insert driving oil cylinder and is clamped in the nut clamping groove of the clamping slider, so that the clamping slider can be driven to slide back and forth, and the insert driving oil cylinder can be conveniently disassembled and assembled; and the fastening nut is vertically clamped in the nut clamping groove, so that the clamping sliding block is more stable when sliding horizontally and reciprocally along with the push rod.

Optionally, the upper die frame is fixedly provided with a limiting wedge block, and the limiting wedge block penetrates through and slides on the clamping slider; during injection molding, the limiting wedge blocks can block the reciprocating sliding of the clamping sliding blocks.

By adopting the technical scheme, the limiting wedge block and the upper die frame are fixedly arranged, so that the limiting wedge block and the upper die frame can slide together under the drive of a top driving source of the injection molding machine; when moulding plastics, spacing voussoir wears to locate in the joint slider for the joint slider drives special-shaped mold insert and is stabilized spacingly, has increased product injection moulding's stability in succession.

Optionally, the lower die core assembly includes a lower die core mounting plate, a wedge block clamping groove is formed in the lower die core mounting plate, and the wedge block clamping groove can penetrate through the clamping slider and is arranged in the wedge block clamping groove in a clamping manner.

Through adopting above-mentioned technical scheme, the setting of voussoir draw-in groove has increased the installation steadiness of spacing voussoir for spacing voussoir is by firm spacing in vertical direction, thereby has restricted the reciprocating slip of joint slider in the horizontal direction, has then further increased the spacing stability of dysmorphism mold insert when moulding plastics.

Optionally, one side of the limiting wedge block, which is close to the fixed cavity, is provided with an inclined abutting surface, and the inclined abutting surface extends downwards along a direction away from the fixed cavity.

Through adopting above-mentioned technical scheme, the setting of slope butt face provides the buffering for the wearing of spacing voussoir to establish the slip, makes things convenient for spacing voussoir along its slope butt face smooth installation and dismantles in the joint slider.

Optionally, the lower mold core mounting panel wears to establish and slides and be provided with the drawing of patterns pole that is used for the butt product inner bottom surface, the drawing of patterns pole can be towards being close to or keep away from go up the direction of die carrier.

Through adopting above-mentioned technical scheme, the drawing of patterns pole butt product interior bottom surface, and can slide towards the direction that is close to the die carrier to the effect of the automatic drawing of patterns of injection moulding product has been realized.

Optionally, the upper injection mold and the lower injection mold are both provided with cooling pipelines for cooling.

Through adopting above-mentioned technical scheme, the setting of cooling pipeline has avoided the heat accumulation in the mould, simultaneously, mould plastics and mould plastics the lower mould and all set up cooling pipeline to improved the efficiency of plastic cooling design, improved holistic production efficiency then.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the problem that the demolding of the product is inconvenient because the setting direction of the insert is perpendicular to the demolding direction of the product can be solved. The special-shaped insert is positioned in the positioning cavity in the direction perpendicular to the demolding direction of the product, so that a special-shaped hole horizontally arranged on the outer surface of the product can be formed in the injection molding process. The clamping sliding block is fixedly arranged with the special-shaped insert, so that the insert driving oil cylinder can drive the special-shaped insert to move towards the direction far away from the fixed cavity through driving the clamping sliding block, and the space is reserved for conveniently disassembling a formed product.

2. Has higher injection molding stability. The fastening nut is vertically clamped in the nut clamping groove, so that the clamping sliding block can slide horizontally and stably along with the push rod of the insert driving oil cylinder without derailing; meanwhile, the limiting wedge block vertically penetrates through the clamping sliding block, so that the reciprocating sliding of the clamping sliding block can be blocked during injection molding, and the problem that plastic in the shaping cavity leaks due to the fault driving of the insert driving oil cylinder is solved; on the other hand, the lower mold core mounting plate is provided with a wedge block clamping groove, and the limiting wedge block is arranged in the wedge block clamping groove in a penetrating way from top to bottom in a final clamping way during mounting, so that the mounting stability of the limiting wedge block is further improved, and the injection molding stability is higher.

Drawings

FIG. 1 is an isometric view of an overall structure in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the overall structure of an embodiment of the present application;

fig. 3 is a partially exploded view of the structure in the embodiment of the present application.

Reference numerals illustrate:

100. injection molding an upper die; 110. a die carrier is arranged; 111. a glue injection nozzle; 112. a limit wedge block; 1121. an inclined abutment surface; 120. an upper mold core assembly; 121. an upper mold core mounting plate; 122. an inner female die core; 130. a special-shaped insert; 140. a slip driving member; 141. clamping a sliding block; 1411. a nut clamping groove; 142. insert driving oil cylinder; 1421. a fastening nut; 150. a cooling pipe; 200. injection molding of a lower die; 210. a lower die frame; 211. a lower die base; 212. a sliding guide post; 213. a needle ejection plate; 214. a stripper rod; 215. a return spring; 220. a lower die core assembly; 221. a lower mold core mounting plate; 2211. wedge block clamping grooves; 222. and an outer male die core.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses an injection mold for molding a special-shaped hole cavity. Referring to fig. 1, an injection mold for molding a cavity with a special hole comprises an injection upper mold 100 and an injection lower mold 200, wherein the top of the injection upper mold 100 is provided with a glue injection nozzle 111 communicated with an injection machine for injecting plastic and a glue injection runner for guiding the injected plastic is arranged inside. Referring to fig. 2, the injection upper mold 100 includes an upper mold frame 110 and an upper mold core assembly 120 mounted to the upper mold frame 110, the upper mold core assembly 120 including an upper mold core mounting plate 121 and an inner mold core 122 embedded in the upper mold core mounting plate 121; the injection lower die 200 comprises a lower die frame 210 and a lower die core assembly 220 arranged on the lower die frame 210, the lower die core assembly 220 comprises a lower die core mounting plate 221 and an outer convex die core 222 embedded in the lower die core mounting plate 221, the upper die core mounting plate 121 and the lower die core mounting plate 221 are oppositely spliced, the inner die core 122 and the outer convex die core 222 together form a shaping cavity for injection molding, and the shaping cavity is communicated with an injection runner to form a molded product through injection molding.

Referring to fig. 2 and 3, it is further explained that, after the injection upper mold 100 and the injection lower mold 200 are opened, the direction in which the molded article is vertically and upwardly removed along the male mold core 222 is a demolding direction. The injection upper mold 100 further includes a shaped insert 130 and a sliding driving member 140, which are perpendicular to the demolding direction of the product, wherein the shaped insert 130 is located in the positioning cavity, so that a shaped hole horizontally arranged on the outer surface of the product can be formed in the injection process. The sliding driving piece 140 comprises a clamping sliding block 141 and an insert driving oil cylinder 142, the clamping sliding block 141 and the special-shaped insert 130 are fixedly arranged, the insert driving oil cylinder 142 can drive the clamping sliding block 141 to slide back and forth along the horizontal direction in the direction close to or far away from the fixed cavity, and accordingly the special-shaped insert 130 can be driven to slide in the direction far away from the fixed cavity to vacate space, and the product demoulding is facilitated. The insert driving oil cylinder 142 and the special-shaped insert 130 are in transmission through the clamping sliding block 141, so that the sliding stroke of the insert driving oil cylinder 142 can be reduced, and the sliding efficiency can be improved conveniently and the quick demoulding can be realized.

Referring to fig. 2 and 3, it should be noted that the clamping slider 141 is slidably disposed on the upper mold core mounting plate 121 and is located outside the positioning cavity, and a nut clamping groove 1411 is vertically formed on the left side of the clamping slider 141. The nut clamping groove 1411 is cross-shaped in top view, a fastening nut 1421 is vertically clamped and installed, and the fastening nut 1421 is fixedly arranged with the push rod threads of the insert driving oil cylinder 142. The mode of joint assembly is convenient for the independent dismantlement of mold insert driving cylinder 142, simultaneously, because of the vertical joint of fastening nut 1421 in nut draw-in groove 1411 for joint slider 141 can be along with the horizontal firm slip of push rod of mold insert driving cylinder 142 can not derail.

Referring to fig. 2, the upper mold frame 110 is fixedly provided with a limiting wedge block 112, and the limiting wedge block 112 vertically penetrates through the clamping slider 141, so that the reciprocating sliding of the clamping slider 141 can be blocked during injection molding, the problem that plastic in the shaping cavity leaks due to the fault driving of the insert driving oil cylinder 142 is solved, and the stability of integral injection molding is improved. Correspondingly, the lower mold core mounting plate 221 is provided with a wedge block clamping groove 2211, and the limiting wedge block 112 is penetrated through the clamping sliding block 141 from top to bottom and finally clamped in the wedge block clamping groove 2211 during mounting, so that the effect of integrally stabilizing injection molding is realized by further increasing the mounting stability of the limiting wedge block 112. The right side surface of the limiting wedge block 112 extends downwards to form an inclined abutting surface 1121 along the direction away from the fixed cavity, so that the lower end surface of the limiting wedge block 112 is smaller than the upper end surface, the inclined abutting surface 1121 is conveniently abutted to enable the limiting wedge block 112 to be arranged in the clamping sliding block 141 in a penetrating mode, and the vertical sliding of the limiting wedge block 112 is buffered.

Referring to fig. 2, the lower mold frame 210 includes a lower mold base 211 fixedly installed on an injection molding machine, a sliding guide post 212 penetrating through and sliding on a lower mold core mounting plate 221, an ejector plate 213 fixedly arranged at the bottom of the sliding guide post 212, and a demolding rod 214 fixedly arranged at the top of the ejector plate 213, wherein the top of the demolding rod 214 is abutted against the inner bottom surface of a product, and the ejector plate 213 is fixedly arranged with an jacking driving source of the injection molding machine, so that the demolding rod 214 can be driven to vertically slide in a direction close to or far away from a fixed mold cavity, and the effect that the demolding rod 214 drives a formed product to automatically demold is achieved. A return spring 215 is further arranged between the lower mold core mounting plate 221 and the ejector plate 213, and the return spring 215 is arranged around the peripheral wall of the sliding guide post 212, so that the ejector plate 213 can be driven to rebound by the compression elastic potential energy stored during demolding.

Referring to fig. 3, further illustrating, in the injection upper mold 100 and the injection lower mold 200 of the injection mold for molding the special-shaped hole-type cavity in the application, the cooling pipeline 150 for cooling is respectively arranged in the injection upper mold and the injection lower mold, so that the problem of heat accumulation in the mold is solved, and the cooling is performed at the same time, the efficiency of cooling and shaping the plastic is improved, and the overall production efficiency is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the above description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. An injection mold for molding a special-shaped hole cavity, comprising:

an injection upper mold (100), wherein the injection upper mold (100) comprises an upper mold frame (110) and an upper mold core assembly (120);

an injection lower die (200), the injection lower die (200) comprising a lower die carrier (210) and a lower die core assembly (220);

the upper injection mold (100) and the lower injection mold (200) are arranged oppositely, the upper mold core assembly (120) and the lower mold core assembly (220) form a shaping cavity for injection molding together, and the upper injection mold (100) is provided with a glue injection nozzle (111) for communicating an injection molding machine to inject plastic and a glue injection runner for guiding the plastic to the shaping cavity; the injection molding upper die (100) further comprises a special-shaped insert (130) and a sliding driving piece (140), wherein the special-shaped insert (130) is perpendicular to the demolding direction, and the special-shaped insert (130) is arranged in the shaping cavity and can slide towards a direction close to or far away from the shaping cavity under the driving of the sliding driving piece (140).

2. Injection mold for forming a special-shaped hole cavity according to claim 1, characterized in that the sliding driving piece (140) comprises a clamping sliding block (141) fixedly arranged with the special-shaped insert (130) and an insert driving oil cylinder (142) for driving the clamping sliding block (141) to horizontally slide towards a direction approaching or separating from the shaping cavity; the upper die core assembly (120) comprises an upper die core mounting plate (121) which is spliced in a butt joint manner with the injection lower die (200), the insert driving oil cylinder (142) is fixedly arranged with the upper die core mounting plate (121), and the clamping sliding block (141) is slidably arranged on the upper die core mounting plate (121) and is positioned outside the shaping cavity.

3. The injection mold for molding the special-shaped hole cavity according to claim 2, wherein a nut clamping groove (1411) is formed in one end, close to the insert driving oil cylinder (142), of the clamping slider (141), and a fastening nut (1421) which is clamped and installed in the nut clamping groove (1411) in the vertical direction is arranged at the end of a push rod of the insert driving oil cylinder (142).

4. The injection mold for molding the special-shaped hole type cavity according to claim 2, wherein the upper mold frame (110) is fixedly provided with a limiting wedge block (112), and the limiting wedge block (112) is penetrated and slipped on the clamping slider (141); during injection molding, the limiting wedge block (112) can block the reciprocating sliding of the clamping sliding block (141).

5. The injection mold for molding the special-shaped hole cavity according to claim 4, wherein the lower mold core assembly (220) comprises a lower mold core mounting plate (221), a wedge block clamping groove (2211) is formed in the lower mold core mounting plate (221), and the wedge block clamping groove (2211) can penetrate through the clamping slider (141) and is clamped in the wedge block clamping groove (2211).

6. Injection mold for molding a cavity with a special-shaped hole pattern according to claim 4, characterized in that an inclined abutting surface (1121) is arranged on one side of the limiting wedge block (112) close to the fixed cavity, and the inclined abutting surface (1121) is arranged in a downward extending manner along a direction away from the fixed cavity.

7. Injection mold for forming a special-shaped hole cavity according to claim 5, characterized in that the lower mold core mounting plate (221) is provided with a demolding rod (214) penetrating and sliding and being used for abutting against the inner bottom surface of a product, and the demolding rod (214) can slide towards a direction approaching or separating from the upper mold frame (110).

8. Injection mold for molding a special-shaped hole cavity according to claim 1, characterized in that the injection upper mold (100) and the injection lower mold (200) are both provided with cooling pipes (150) for cooling down.