CN213321398U - Radian core-pulling injection mold - Google Patents

Abstract

The utility model discloses a radian core-pulling injection mold which is used for elbow injection molding and comprises an upper mold base, a lower mold base, an upper template, a lower template, an upper mold core and a lower mold core, the upper and lower templates are respectively positioned in the upper and lower die seats, the upper and lower cores are respectively positioned in the upper and lower templates, the upper die core and the lower die core are both arc surfaces, an arc through hole is formed after the upper die core and the lower die core are assembled, the arc-shaped through hole is embedded with a radian core pulling insert which comprises a radian core rod inserted into the through hole, the radian core bar, the upper die core and the lower die core together form an injection molding die cavity, one side of the radian core bar is provided with a core bar sliding block, a switching sliding block and a core pulling oil cylinder, the core rod sliding block and the switching sliding block and the core-pulling oil cylinder are rotatably connected through pivot connecting blocks. The utility model discloses a radian inserts of loosing core realizes the injection moulding to the return bend.

Description

Radian core-pulling injection mold

Technical Field

The utility model relates to an injection mold field, concretely relates to radian injection mold of loosing core.

Background

The plastic product is widely applied to daily life, the plastic product is manufactured by injection molding or blow molding of a mold, and the injection mold is a tool for producing plastic products; and is also a tool for giving the plastic product complete structure and accurate dimension. Injection molding is a processing method used for mass production of parts with complex shapes, and particularly relates to a method for injecting a material melted by heating into a mold cavity from high pressure, and obtaining a formed product after cooling and solidification.

An embedded core-pulling mold is adopted for a tubular injection molding part, an oil cylinder core-pulling mechanism is generally adopted in a traditional embedded core-pulling mold, a sliding block is connected to an oil cylinder part through an oil cylinder connecting piece, hydraulic energy is converted into mechanical energy, and the core pulling is realized by linear reciprocating motion. The core-pulling mechanism is only suitable for some common products, and for some products with special shapes, for example, bent pipes with arc shapes can not realize nondestructive demoulding blanking, so that bent pipe products are easy to deform and even damage.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an injection mold is loosed core to radian realizes the injection moulding to the return bend through the inserts of loosing core of radian.

In order to solve the technical problem, the utility model provides a radian core pulling injection mold which is used for elbow injection molding and comprises an upper mold seat, a lower mold seat, an upper template, a lower template, an upper mold core and a lower mold core, the upper and lower templates are respectively positioned in the upper and lower die seats, the upper and lower cores are respectively positioned in the upper and lower templates, the upper die core and the lower die core are both arc surfaces, an arc through hole is formed after the upper die core and the lower die core are assembled, the arc-shaped through hole is embedded with a radian core pulling insert which comprises a radian core rod inserted into the through hole, the radian core bar, the upper die core and the lower die core together form an injection molding die cavity, one side of the radian core bar is provided with a core bar sliding block, a switching sliding block and a core pulling oil cylinder, the core rod sliding block and the switching sliding block and the core-pulling oil cylinder are rotatably connected through pivot connecting blocks.

In a preferred embodiment of the present invention, the core bar block is provided with a positioning groove, and the upper mold core is provided with a limiting portion engaged with the positioning groove.

In a preferred embodiment of the present invention, the arc surface of the upper and lower mold cores forms the outer wall of the elbow, and the arc core rod forms the inner wall of the elbow.

The present invention further provides a method for manufacturing a mold, which comprises forming two arc-shaped through holes after the upper mold core and the lower mold core are closed, and providing two arc-shaped core rods inserted into the arc-shaped through holes respectively by the core rod slide block.

The utility model discloses a preferred embodiment, further include be provided with the mouth of moulding plastics on the upper die base, it is provided with the pipeline of moulding plastics to mould plastics mouthful below, the pipeline of moulding plastics runs through cope match-plate pattern and last mould benevolence, the pipeline of moulding plastics communicates with the mould cavity of moulding plastics.

The utility model discloses a preferred embodiment, further include four angles departments in the cope match-plate pattern are provided with the guide pin bushing, four angles departments of lower bolster be provided with guide pin bushing complex guide pillar, the guide pillar is followed the guide pin bushing motion is accomplished upper and lower template compound die and die sinking.

The utility model discloses a preferred embodiment, further include a plurality of independent cooling water pipes that set up, cooling water pipe runs through respectively and sets up in cope match-plate pattern and last mould benevolence and lower bolster and lower mould benevolence.

The utility model discloses a preferred embodiment, further include be provided with the thimble board between lower bolster and the lower mould benevolence, be provided with on the thimble board and push away the material thimble, it runs through to push away the material thimble lower mould benevolence removes to the mould cavity direction of moulding plastics.

The utility model has the advantages that:

the utility model discloses an upper die benevolence, lower mould benevolence and the radian inserts of loosing core that have the arc surface have formed the injection mold chamber of elbow type, have realized the injection moulding to the return bend to, in the radian inserts of loosing core, the switching piece that adopts the pivot connection realizes the radian core bar and the hydro-cylinder of loosing core is connected, can drive the multi-angle swing of radian core bar in the injection mold intracavity through switching piece and pivot, can realize the radian after the completion of moulding plastics and loose core.

Drawings

Fig. 1 is a schematic view of the overall external structure of the radian core pulling injection mold of the utility model;

FIG. 2 is a schematic structural view of the inside of the radian core-pulling injection mold of the present invention;

fig. 3 is the structure schematic diagram of the radian inserts of loosing core of the utility model.

The reference numbers in the figures illustrate: 1. an upper die base; 2. a lower die base; 3. mounting a template; 4. a lower template; 5. an upper die core; 6. a lower die core; 7. a radian core-pulling insert; 701. a radian core bar; 702. a core bar slide block; 703. a transfer slide block; 704. a pivot connection block; 705. a core-pulling oil cylinder; 706. a positioning groove; 8. an injection molding port; 9. injecting a pipeline; 10. a guide sleeve; 11. a guide post; 12. a cooling water pipe; 13. an ejector plate; 14. and pushing a material thimble.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1-2, an embodiment of the radian core pulling injection mold of the present invention is used for elbow injection molding, and includes an upper mold base 1, a lower mold base 2, an upper mold plate 3, a lower mold plate 4, an upper mold core 5 and a lower mold core 6, wherein the upper and lower mold plates are respectively located in the upper and lower mold bases, the upper and lower mold cores are respectively located in the upper and lower mold plates, the upper mold core 5 and the lower mold core 6 are both arc surfaces, an arc through hole is formed after the upper mold core 5 and the lower mold core 6 are closed, a radian core pulling insert 7 is embedded in the arc through hole, the radian core pulling insert 7 includes a radian core rod 701 inserted into the through hole, the radian core rod 701, the upper mold core 5 and the lower mold core 6 together form an injection mold cavity, the arc surfaces of the upper and lower mold cores form the outer wall shape of the elbow, the radian core rod 701 forms the inner wall shape of, and injecting injection molding materials into the injection mold cavity to realize the injection molding of the bent pipe.

Referring to fig. 3, a core rod slider 702, an adapting slider 703 and a core pulling cylinder 704 are arranged on one side of the arc core rod 701, and the core rod slider 702 and the adapting slider 703 and the core pulling cylinder 704 are rotatably connected through a pivot connection block 705; after the injection molding is finished, the upper template 3 and the lower template 4 are opened, the core rod slider 702 is pulled by the core pulling cylinder 705 through the adapter slider 703, and the adapter slider 703, the core rod slider 702 and the core pulling cylinder 704 are movably connected through the pivot connecting block 705, so that the change of the angle of the radian core rod 701 can be realized in the core pulling process, and the radian core pulling of the radian core rod 701 can be realized no matter the size of the bending radian of the injection molded elbow.

In the injection molding process, the core bar sliding block 702 is movably connected through the pivot connection block 705, so that the radian core bar 701 may shake due to impact pressure of injection molding, in this embodiment, the core bar sliding block 702 is provided with the positioning groove 706, the upper die core 5 is provided with the limiting part clamped with the positioning groove 702, after die assembly is performed, the limiting part abuts against the positioning groove 702, and the movable core bar sliding block 702 is limited to move through the fixed upper die core 5, so that the radian core bar 701 is effectively prevented from shaking in the injection molding process, and the injection molding quality is ensured.

In this embodiment, two arc through holes are formed after the upper mold core 5 and the lower mold core 6 are closed, the core bar slide block 702 is provided with two arc core bars 701 which are respectively inserted into the arc through holes, in other embodiments, a plurality of arc through holes can be also formed after the mold is closed, and a plurality of arc core bars 701 which are inserted into the arc through holes are arranged on the core bar slide block 702, so that the simultaneous injection molding of a plurality of bent pipes is realized, and the production efficiency is improved.

Specifically, be provided with on the upper die base 1 and mould plastics mouthful 8, it is provided with the pipeline 9 of moulding plastics to mould plastics mouthful 8 below, the pipeline 9 of moulding plastics runs through cope match-plate pattern 3 and last mould benevolence 5, the pipeline 9 of moulding plastics communicates with the mould cavity of moulding plastics, if be provided with a plurality of mould cavities of moulding plastics in the mould, the pipeline 9 branch of moulding plastics flows into in a plurality of mould cavities of moulding plastics.

Specifically, guide sleeves 10 are arranged at four corners in the upper template 3, guide posts 11 matched with the guide sleeves 10 are arranged at four corners of the lower template 4, the guide posts 11 move along the guide sleeves 10 to complete the die assembly and die opening of the upper template and the lower template, and the positions of the upper template and the lower template after die assembly are more accurate through the matching of the guide posts 11 and the guide sleeves 10.

In order to realize the quick cooling molding after the injection molding is completed, the injection molding machine further comprises a plurality of cooling water pipes 12 which are independently arranged in the embodiment, the cooling water pipes 12 respectively penetrate through the upper template 3, the upper die core 5, the lower template 4 and the lower die core 6, and a water inlet and a water outlet of each cooling water pipe 12 are respectively arranged on the side walls of the upper template 3 and the lower template 5.

In order to conveniently take out the injection molding elbow after the mold is opened, an ejector plate 13 is arranged between the lower mold plate 4 and the lower mold core 6, a material pushing ejector pin 14 is arranged on the ejector plate 13, the material pushing ejector pin 14 runs through the lower mold core 6 to move towards the injection mold cavity, and after the injection molding is completed, the material pushing ejector pin 14 ejects the molded elbow out of the lower mold core 6.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims (8)

1. A radian core-pulling injection mold is used for elbow injection molding and comprises an upper mold base, a lower mold base, an upper template, a lower template, an upper mold core and a lower mold core, the upper and lower templates are respectively positioned in the upper and lower die seats, the upper and lower cores are respectively positioned in the upper and lower templates, it is characterized in that the upper die core and the lower die core are both arc surfaces, an arc through hole is formed after the upper die core and the lower die core are assembled, the arc-shaped through hole is embedded with a radian core pulling insert which comprises a radian core rod inserted into the through hole, the radian core bar, the upper die core and the lower die core together form an injection molding die cavity, one side of the radian core bar is provided with a core bar sliding block, a switching sliding block and a core pulling oil cylinder, the core rod sliding block and the switching sliding block and the core-pulling oil cylinder are rotatably connected through pivot connecting blocks.

2. The radian core pulling injection mold according to claim 1, wherein a positioning groove is formed in the core bar sliding block, and a limiting part clamped with the positioning groove is arranged on the upper mold core.

3. The radian core pulling injection mold according to claim 1, wherein the arc surfaces of the upper mold core and the lower mold core form the shape of the outer wall of the bent pipe, and the shape of the radian core rod forms the shape of the inner wall of the bent pipe.

4. The radian core pulling injection mold according to claim 1, wherein the upper mold core and the lower mold core are assembled to form two arc-shaped through holes, and the core rod slide block is provided with two radian core rods which are respectively inserted into the arc-shaped through holes.

5. The radian core pulling injection mold according to claim 1, wherein an injection port is formed in the upper mold base, an injection pipeline is arranged below the injection port, the injection pipeline penetrates through the upper mold plate and the upper mold core, and the injection pipeline is communicated with an injection mold cavity.

6. The radian core pulling injection mold according to claim 1, wherein guide sleeves are arranged at four corners in the upper mold plate, guide pillars matched with the guide sleeves are arranged at four corners of the lower mold plate, and the guide pillars move along the guide sleeves to complete mold closing and mold opening of the upper mold plate and the lower mold plate.

7. The radian core pulling injection mold according to claim 1, further comprising a plurality of independently arranged cooling water pipes, wherein the cooling water pipes respectively penetrate through the upper mold plate and the upper mold core and the lower mold plate and the lower mold core.

8. The radian core pulling injection mold according to claim 1, wherein an ejector plate is arranged between the lower mold plate and the lower mold core, a material pushing ejector pin is arranged on the ejector plate, and the material pushing ejector pin penetrates through the lower mold core and moves towards the direction of the injection mold cavity.

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