CN213972371U - Transparent thick-wall variable-cavity injection mold - Google Patents

Abstract

The utility model relates to an injection mold technical field just discloses variable die cavity injection mold of transparent thick wall, including preceding mould chamber, the equal fixed mounting in the left and right sides of preceding mould chamber bottom has back mould die cavity, be equipped with the shaping chamber between preceding mould chamber and the back mould die cavity, be equipped with the core in the shaping chamber, the bottom of core is equipped with the drawing of patterns backing plate. This variable die cavity injection mold of transparent thick wall pushes the core to the shaping intracavity through the elasticity of powerful spring, has reduced the shaping chamber space to avoid just injecting into the emergence of shaping intracavity turbulent flow at the melting material. Along with the continuous injection of melting material, the pressure in the shaping intracavity increases gradually, and the pressure that increases pushes away the core backward and extrudes until the core resets, has accomplished the shaping of product simultaneously. The method ensures that the molten material presents stable laminar flow in the molding cavity, avoids the occurrence of turbulent flow, and can be used for injection molding of transparent thick-wall products, thereby realizing the advantage of no appearance defects on the surface of the product.

Description

Transparent thick-wall variable-cavity injection mold

Technical Field

The utility model relates to an injection mold technical field specifically is the variable die cavity injection mold of transparent thick wall.

Background

Injection molding, also known as injection molding, is a method of molding by injection and molding. The injection molding method has the advantages of high production speed, high efficiency, automation of operation, various colors, various shapes from simple to complex, small sizes, accurate product size, easy replacement of products, capability of forming products with complex shapes, and suitability for the molding processing fields of mass production, products with complex shapes and the like.

The injection molding of thick-wall products is always a difficult point in injection molding, and because the product is thick in glue position, the surface quality of the molded product is poor, the air flow lines and sink marks and pits are serious, and for transparent products with very high quality requirements, the appearance defects seriously affect the product quality, so that the product molding design fails. The existing thick-wall product is mostly formed by adopting a gas-assisted injection molding technology or a layering multi-time injection molding method, but the forming technology needs a separate gas-assisted system or a special injection molding machine, and the equipment is improved or the investment is large.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a variable die cavity injection mold of transparent thick wall possesses product surface no appearance defect and simple structure's advantage, has solved the problem of proposing among the above-mentioned background art.

The utility model provides a following technical scheme: transparent variable die cavity injection mold of thick wall, including the front mould chamber, the equal fixed mounting in left and right sides of front mould chamber bottom has the back mould die cavity, be equipped with the die cavity between front mould chamber and the back mould die cavity, be equipped with the core in the die cavity, the bottom of core is equipped with the drawing of patterns backing plate, the bottom of drawing of patterns backing plate is equipped with the back mould fixed plate, the mounting groove has been seted up to one side on back mould fixed plate top, the inside movable mounting movable rod of mounting groove.

Preferably, the top fixed mounting of movable rod has the gag lever post, powerful spring has been cup jointed in the lateral surface activity of movable rod, the bottom of mounting groove is run through to the bottom of movable rod, the top of gag lever post contacts with the bottom of drawing of patterns backing plate.

Preferably, the top end of the strong spring is fixedly connected with the bottom end of the limiting rod, and the bottom end of the strong spring is fixedly connected with the bottom end of the inner cavity of the mounting groove.

Preferably, a cavity plate fixing plate is fixedly mounted at the left end of the rear mold cavity, a cavity plate is fixedly mounted at the top end of the cavity plate fixing plate, and the right end of the cavity plate is fixedly connected with the left end of the rear mold cavity.

Preferably, the top end of the demolding backing plate is in contact with the bottom end of the core, a demolding plate is fixedly mounted at the top end of the demolding backing plate, and one side of the demolding plate is in contact with one side of the core.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this variable die cavity injection mold of transparent thick wall, through having installed spring structure at mould core rear portion, the elasticity that utilizes powerful spring pushes the core to the shaping intracavity, has reduced the shaping chamber space to avoid just pouring into the emergence of shaping intracavity turbulent flow into at the melting material, along with the continuous injection of melting material, the pressure in the shaping intracavity increases gradually, and the pressure that increases pushes the core backward until the core resets, has accomplished the shaping of product simultaneously. The method ensures that the molten material presents stable laminar flow in the molding cavity, avoids the occurrence of turbulent flow, and can be used for injection molding of transparent thick-wall products, thereby realizing the advantage of no appearance defects on the surface of the product.

2. This variable die cavity injection mold of transparent thick wall, mould simple structure, the mould drops into and conventional mould and drops into equivalently, need not to carry out the input of special equipment, and ordinary hydraulic pressure injection molding machine alright accomplish the injection moulding processing of product.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the front mold cavity structure of the present invention;

fig. 3 is an exploded view of the structure of the strong spring and the movable rod of the present invention.

In the figure: 1. a front mold cavity; 2. a rear mold cavity; 3. a molding cavity; 4. a cavity plate; 5. a cavity plate fixing plate; 6. a core; 7. demolding the base plate; 8. a stripper plate; 9. a rear mold fixing plate; 10. mounting grooves; 11. A limiting rod; 12. a movable rod; 13. a strong spring.

Detailed Description

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

Referring to fig. 1-3, the transparent thick-wall variable-cavity injection mold comprises a front mold cavity 1, rear mold cavities 2 are fixedly mounted on the left and right sides of the bottom end of the front mold cavity 1, a molding cavity 3 is arranged between the front mold cavity 1 and the rear mold cavities 2, a mold core 6 is arranged in the molding cavity 3, a demolding cushion plate 7 is arranged at the bottom end of the mold core 6, a rear mold fixing plate 9 is arranged at the bottom end of the demolding cushion plate 7, a mounting groove 10 is formed in one side of the top end of the rear mold fixing plate 9, and a movable rod 12 is movably mounted in the mounting groove 10.

Wherein, the top fixed mounting of movable rod 12 has gag lever post 11, and powerful spring 13 has been cup jointed in the lateral surface activity of movable rod 12, and the bottom of mounting groove 10 is run through to the bottom of movable rod 12, and the top of gag lever post 11 contacts with the bottom of drawing of patterns backing plate 7, and the accessible presses movable rod 12 and then drives the compression of powerful spring 13 to otherwise provide the advance that elasticity drove stripper plate 8 and drawing of patterns backing plate 7.

Wherein, the top of powerful spring 13 and the bottom fixed connection of gag lever post 11, the bottom of powerful spring 13 and the bottom fixed connection of mounting groove 10 inner chamber utilize the elasticity of powerful spring 13 to push core 6 to the shaping chamber 3 in, reduced shaping chamber 3 space to avoid just pouring into the emergence of the turbulent flow in the shaping chamber 3 at the melting material.

Wherein, the left end fixed mounting of back mould die cavity 2 has die cavity board fixed plate 5, and the top fixed mounting of die cavity board fixed plate 5 has die cavity board 4, and the right-hand member of die cavity board 4 and the left end fixed connection of back mould die cavity 2.

The top end of the demoulding backing plate 7 is in contact with the bottom end of the mold core 6, the top end of the demoulding backing plate 7 is fixedly provided with a demoulding plate 8, one side of the demoulding plate 8 is in contact with one side of the mold core 6, and after a product is cooled and formed, the demoulding backing plate 7 and the demoulding plate 8 push the mold core 6 to advance under the action of a demoulding mechanism of an injection molding machine, so that the product is ejected out of the forming cavity 3, and demoulding is realized.

The working principle is as follows: when the transparent thick-wall variable-cavity injection mold is used, before mold closing, under the action of a strong spring 13, a mold stripping backing plate 7 and a mold stripping plate 8 push a mold core 6 to advance and protrude into a molding cavity 3, the space of the molding cavity 3 is reduced, proper injection molding process parameters are matched, molten materials are injected into the molding cavity 3 under the pushing of an injection unit of an injection molding machine in a stable laminar state, after the pressure of the molten materials in the molding cavity 3 is increased, the molten materials push the mold core 6 to retreat, the molten materials are continuously filled into an enlarged molding cavity 3 in the stable laminar state until the pushing force of the strong spring on the mold core 6 and the pressure of the molten materials in the molding cavity 3 reach a balanced state, pressure is continuously maintained until the product is basically cooled and molded, shrinkage is prevented, after the product is cooled and molded, under the action of a mold stripping mechanism of the injection molding machine, the mold stripping backing plate 7 and the mold stripping plate 8 push the mold core 6 to advance, and ejecting the product out of the forming cavity 3 to realize demoulding.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims (5)

1. Transparent thick wall variable cavity injection mold, including preceding mold cavity (1), its characterized in that: the equal fixed mounting in the left and right sides of preceding model chamber (1) bottom has back mould die cavity (2), be equipped with between preceding model chamber (1) and back mould die cavity (2) into die cavity (3), be equipped with core (6) in become die cavity (3), the bottom of core (6) is equipped with drawing of patterns backing plate (7), the bottom of drawing of patterns backing plate (7) is equipped with back mould fixed plate (9), mounting groove (10) have been seted up to one side on back mould fixed plate (9) top, inside movable mounting movable rod (12) of mounting groove (10).

2. The transparent thick-walled variable-cavity injection mold according to claim 1, wherein: the top fixed mounting of movable rod (12) has gag lever post (11), powerful spring (13) have been cup jointed in the lateral surface activity of movable rod (12), the bottom of mounting groove (10) is run through to the bottom of movable rod (12), the top of gag lever post (11) contacts with the bottom of drawing of patterns backing plate (7).

3. The transparent thick-walled variable-cavity injection mold according to claim 2, wherein: the top end of the strong spring (13) is fixedly connected with the bottom end of the limiting rod (11), and the bottom end of the strong spring (13) is fixedly connected with the bottom end of the inner cavity of the mounting groove (10).

4. The transparent thick-walled variable-cavity injection mold according to claim 1, wherein: the left end fixed mounting of back mould die cavity (2) has die cavity board fixed plate (5), the top fixed mounting of die cavity board fixed plate (5) has die cavity board (4), the right-hand member of die cavity board (4) and the left end fixed connection of back mould die cavity (2).

5. The transparent thick-walled variable-cavity injection mold according to claim 1, wherein: the top of drawing of patterns backing plate (7) contacts with the bottom of core (6), the top fixed mounting of drawing of patterns backing plate (7) has stripper plate (8), one side of stripper plate (8) contacts with one side of core (6).

Images