CN103029236B - Four-plate mould structure - Google Patents

Abstract

The present invention provides a four-plate mold mold structure, which is used for pouring and forming a cover-shaped appearance surface product, including an upper fixing plate, a lower fixing plate, a female template, and a male template provided with a male mold core. It is characterized in that: The mold structure also includes: a push plate, which is arranged between the female template and the male template; a stripping plate, which is arranged between the female template and the upper fixing plate; a rubber bushing, which is fixed It is arranged on the female formwork, and its front end is provided with a core formed by passing through the push plate and protruding toward the male mold core, and a glue inlet hole is provided in the middle. Compared with the prior art, the mold structure of the four-plate mold of the present invention adopts the method of reverse pouring to form the product with the cover-shaped appearance surface. When the mold is opened, the product is left in the mother mold, and then the product is pushed out by the push plate to leave the mold. The defect of the prior art is overcome, and the structure is simple and the manufacturing cost is low.

Description

Four-plate mold structure

【Technical field】

The invention relates to a mold structure, in particular to a four-platen mold structure, in particular to a four-platen mold structure in which a product is ejected from a mother mold.

【Background technique】

At present, in the field of molds, two-plate mold structures and three-plate mold structures are mostly used to complete the molding of plastic products. The mold structure is selected according to the conditions such as the glue feeding form. The three-plate mold structure includes a male template and a female template. One side of the male template is provided with a male mold core, and one side of the female template is provided with a female mold core. When the mold is closed and loaded, the male mold core and The space between the cores of the mother mold forms a cavity, and the melt is injected into the cavity from the runner and cooled to form. After that, the mold needs to be opened to take out the product. The three-plate mold needs to be opened three times: the first mold opening separates the product from the runner; the second mold opening peels the runner from the mold; the third mold opening The product is ejected from the male mold, so that the product is separated from the mold.

However, the above-mentioned three-plate mold structure is mostly suitable for feeding glue from the female mold side and ejecting it from the male mold side. If it is necessary to realize the product forming from the side of the master mold, the side of the master mold is ejected, that is, the product is formed by reverse injection, and other complex ejection mechanisms such as hydraulic cylinders are required in the mold, and other complex ejection mechanisms such as hydraulic cylinders are required. The mechanism is large in size and requires a large space. The corresponding mold base and molding machine need to be enlarged, there are many parts, the processing and assembly are very complicated, and the cost is correspondingly increased a lot.

【Content of invention】

In view of the above problems, the purpose of the present invention is to provide a mold structure with simple structure and low cost, so as to overcome the defect that the mold structure of the three-plate mold in the prior art is not suitable for reverse injection molding products.

In order to achieve the above-mentioned purpose, the present invention provides a four-plate mold structure, which is used to reversely form a cover-shaped appearance surface product, including an upper fixed plate, a lower fixed plate, a female template, and a male template provided with a male mold core. , characterized in that the mold structure also includes:

a push plate, which is arranged between the female template and the male template;

A stripping plate, which is arranged between the master template and the upper fixing plate;

A glue-feeding bush, which is fixed on the female formwork, is provided with a core protruding through the push plate to the male mold core at the front end, and a glue-feeding hole is arranged in the middle.

Preferably, a pressing block is arranged on the rubber-feeding bush, and the rubber-feeding bush is detachably mounted on the master template through the pressing block.

Preferably, a shutter is also provided between the master template and the push plate. The shutter cooperates to control the sequence of the master template and the push plate when the mold is opened.

Preferably, a first pull rod is further arranged between the master template and the push plate. One end of the first pull rod is fixed on the female template, and the other end of the step structure is movably arranged in the movable space formed when the push plate and the male template are closed. The first pull rod limits the mold opening distance between the master template and the push plate and transmits the mold opening force when the mold is opened.

Preferably, a second pull rod is also arranged between the push plate and the male template. One end of the second pull rod is fixed on the push plate, and the other end of the step structure is movably arranged in the movable space inside the male template. When opening the mold, the second pull rod limits the mold opening distance between the push plate and the male template and transmits the mold opening force.

Preferably, the mold structure is also provided with a two-way movable tie rod, the middle part of which is fixed on the stripping plate, the step structure at the lower end is movably set in the guide hole of the push plate and the male template, and the step structure at the upper end A T-shaped guide sleeve is fixed between the stripping plate, and the T-shaped guide sleeve is movably arranged on the upper fixing plate. When the mold is opened, the step surface of the T-shaped guide sleeve is buckled on the upper fixing plate, and when the mold is closed, a space is provided between the step surface of the T-shaped guide sleeve and the upper fixing plate.

Preferably, an elastic element is further arranged between the stripping plate and the master template. When the mold is opened, the deformation recovery force of the elastic element separates the stripping plate from the master template, and separates the runner from the product. More preferably, the elastic element is a spring. Optimally, the spring is sheathed on the two-way movable tie rod, its lower end is fixed on the mother template, and its upper end is in contact with the stripping plate when the mold is closed.

When the mold is opened for the first time, the stripping plate is separated from the master template first, so that the flow channel is separated from the product; when the mold is opened for the second time, the upper fixing plate is separated from the stripping plate, so that the flow channel is separated from the mold first ; When opening the mold for the third time, the push plate is separated from the male template, and the product is left on the core of the rubber-injected bush due to the effect of the tight force; when the mold is opened for the fourth time, the female template and the push plate Separated, the push plate pushes the edge of the product to release the product from the core of the feed bushing, thereby releasing the product from the mold.

Compared with the prior art, the mold structure of the four-plate mold of the present invention adopts the method of reverse pouring to form the product with the cover-shaped appearance surface. When the mold is opened, the product is left in the mother mold, and then the product is pushed out by the push plate to leave the mold. It overcomes the defects of the existing technology, and there is no need to design the female mold core in the mold, the stripping plate, the female template and the push plate can be made relatively thin, and the male mold part does not need to design other structures such as ejector plates and foot pads. The structure is simple and the manufacturing cost is low.

【Description of drawings】

Fig. 1 is the front sectional view of the four-platen mold structure of the present invention in the mold clamping state.

Fig. 2 is a partial side sectional view of the four-platen mold structure of the present invention in the mold clamping state.

Fig. 3 is a front sectional view of the four-platen mold structure of the present invention in the mold-opening state.

Fig. 4 is a partial side sectional view of the four-platen mold structure of the present invention in the mold-opening state.

【detailed description】

The preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1 to Fig. 4, the present invention provides a four-plate mold mold structure, which is used for pouring and forming a cover-shaped appearance surface product 10, including an upper fixing plate 20, a lower fixing plate 70, a mother template 40, One is provided with the male formwork 60 of male die kernel 61, it is characterized in that, this mold structure also comprises:

A push plate 50, which is arranged between the female template 40 and the male template 60;

A stripping plate 30, which is arranged between the master template 40 and the upper fixing plate 20;

A glue-injection bushing 80, which is fixedly arranged on the female template 40, is provided with a core formed by protruding from the push plate 50 to the male mold core 61 at its front end, and a glue-inlet hole 83 is provided in the middle thereof .

In this embodiment, the rubber inserting bush 80 is detachably mounted on the master template 40 through a pressing block 82 . Therefore, by customizing the shape of the core of the rubber-feeding bush 80 and the matching male core 61, the four-plate mold structure of the present invention can be used for molding products of different shapes.

In this embodiment, the cap-shaped cosmetic surface product 10 is a cylindrical cosmetic cap with a spherical bottom. The continuous outer surface of the product 10 has high requirements on the appearance, and no glue points, stitches and thimble marks are allowed. Therefore, the product 10 is molded by reverse pouring, so that the product 10 remains in the master mold after the mold is opened. The end face of the annular opening of the product 10 is an assembly face, and no gap is allowed, so glue cannot be fed on this face. Therefore, the best glue-feeding position of the product 10 is designed at the center of the bottom of its inner surface. During injection molding, the molten glue enters the mold cavity formed by the core and the male mold core 61 through the glue-feeding hole 83 of the glue-feeding bush 80 Inside, the runner 81 and the product 10 are formed after cooling.

In this embodiment, a shutter 52 is further disposed between the master template 40 and the push plate 50 . The shutter 52 cooperates to control the sequence of the master template 40 and the push plate 50 when the mold is opened.

In this embodiment, a first pull rod 41 is further disposed between the master template 40 and the push plate 50 . One end of the first pull rod 41 is fixed on the female template 40 , and the other end is movably arranged in the movable space formed when the push plate 50 and the male template 60 are closed with a stepped structure. The first pull rod 41 limits the mold opening distance between the master template 40 and the push plate 50 and transmits mold opening force when the mold is opened.

In this embodiment, a second pull rod 51 is disposed between the push plate 50 and the male template 60 . One end of the second pull rod 51 is fixed on the push plate 50 , and the other end of the stepped structure is movably arranged in the movable space inside the male template 60 . The second pull rod 51 limits the mold opening distance between the push plate 50 and the male template 60 and transmits the mold opening force when the mold is opened.

In this embodiment, the mold structure is also provided with a two-way movable tie rod 90, the middle part of which is fixed on the stripping plate 30, and the step structure at the lower end is movably arranged in the guide hole of the push plate 50 and the male template 60 A T-shaped guide sleeve 91 is fixed between the step structure at the upper end and the stripping plate 30 , and the T-shaped guide sleeve 91 is movably arranged on the upper fixing plate 20 . When the mold is opened, the stepped surface of the T-shaped guide sleeve 91 is buckled on the upper fixing plate 20, and when the mold is closed, a space is provided between the stepped surface of the T-shaped guiding sleeve 91 and the upper fixing plate.

In this embodiment, a spring 42 is also provided between the stripping plate 30 and the master template 40, and the spring 42 is sleeved on the two-way movable pull rod 90, and its lower end is fixed on the female template 40, and its upper end It is in contact with the stripping plate 30 when the mold is closed. When the mold is opened, the deformation recovery force of the spring 42 separates the stripping plate 30 from the master template 40 and separates the runner 81 from the product 10 .

Please refer to FIG. 3 and FIG. 4 , respectively depicting the front sectional view and partial side sectional view of the four-platen mold structure of the present invention in the mold opening state.

When opening the mold for the first time, due to the deformation recovery force of the spring 42, the stripping plate 30 is separated from the master template 40 first, so that the runner 81 (not shown) is separated from the product 10 until the two-way movable pull rod The stepped structure at the lower end of 90 moves upwards to buckle the lower end of the master template, and the preset mold opening distance is greater than the length of the runner 81 (not shown).

When opening the mold for the second time, the upper end step structure of the two-way movable pull rod 90 pulls the T-shaped guide sleeve 91 and the stripping plate 30 to move downward, and the upper fixed plate 20 is separated from the stripping plate 30 until the T-shaped The stepped surface of the guide sleeve 91 is buckled on the upper fixing plate 20, and the flow channel 81 (not shown) is released from the mold.

When opening the mold for the third time, the lower end step structure of the two-way movable pull rod 90 is buckled on the mother template 40, and continues to open the mold. Due to the locking effect of the shutter 52, the mother template 40 and the push plate 50 stop at the same time movement, and the male template 60 is separated from the push plate 50, the product 10 is released from the male mold core 61 and stays on the front core of the rubber-injecting bush 80 due to the action of the tightening force until the push plate The stepped structure of the second tie rod 51 on the 50 fastens the male template 60 , and the preset mold opening distance is greater than the height of the product 10 .

When opening the mold for the fourth time, because the second pull rod 51 fastens the male template 60 and continues to open the mold to pull the push plate 50 to move downward, because the female template 40 cannot move downward due to the restriction of the two-way movable pull rod 90, The shutter 52 is forcibly opened, the push plate 50 is separated from the master template 40, and the edge of the product 10 is pushed by the push plate 50 to disengage the product 10 from the core of the injection bushing 80, thereby making the product 10 The product 10 leaves the mold until the stepped structure of the first tie rod 51 on the master template 40 fastens the lower end of the push plate 50 , and the preset mold opening distance is greater than the height of the product 10 .

Compared with the prior art, the mold structure of the four-plate mold of the present invention adopts the method of reverse pouring to form the product with the cover-shaped appearance surface. When the mold is opened, the product is left in the mother mold, and then the product is pushed out by the push plate to leave the mold. It overcomes the defects of the existing technology, and there is no need to design the female mold core in the mold, the stripping plate, the female template and the push plate can be made relatively thin, and the male mold part does not need to design other structures such as ejector plates and foot pads. The structure is simple and the manufacturing cost is low.

It should be pointed out that the present invention is not limited to the above-mentioned embodiments, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any skilled person based on the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (7)

1. a four-plate mould structure, is used for pouring in down a chimney molding one lid appearance product, including a upper mounted plate, a bottom plate, a caster, a male template being provided with male die core, it is characterised in that this mould structure also includes:

One push pedal, it is arranged between this caster and this male template；

One stripper plate, it is arranged between this caster and this upper mounted plate；

One two-way active pull rod, it is fixedly arranged in the middle part of it on this stripper plate, the ledge structure of its lower end is movably set in the guide hole of this push pedal and this male template, is installed with a T-shaped guide pin bushing between the ledge structure of its upper end and this stripper plate, and this T-shaped guide pin bushing is movably set on this upper mounted plate；

One enters glue lining, and it is fixedly arranged on this caster, and its front end is provided with a core formed through this push pedal to this male die core protrusion, is provided with glue feeding opening in the middle part of it.

Four-plate mould structure the most according to claim 1, it is characterised in that this enters to be provided with a briquetting on glue lining, and this is entered glue lining and is removably installed on this caster by this briquetting.

Four-plate mould structure the most according to claim 1, it is characterised in that be additionally provided with a shutter between this caster and this push pedal.

Four-plate mould structure the most according to claim 1, it is characterised in that be additionally provided with one first pull bar between this caster and this push pedal.

Four-plate mould structure the most according to claim 1, it is characterised in that be additionally provided with one second pull bar between this push pedal and this male template.

Four-plate mould structure the most according to claim 1, it is characterised in that be additionally provided with a flexible member between this stripper plate and this caster.

Four-plate mould structure the most according to claim 6, it is characterised in that this flexible member is a spring.