CN215550616U - Injection mold with reversely arranged mold core - Google Patents

Abstract

The utility model discloses an injection mold with a reversely arranged core, which aims at solving the problem that the prior art is not beneficial to product demoulding and provides the following technical scheme that the injection mold comprises a mold frame, a front template and a rear template which are arranged on the mold frame and oppositely matched, a core for forming the inner surface of a product, a cavity for forming the outer surface of the product and a push-out mechanism arranged on the mold frame and used for pushing out the product, wherein the push-out mechanism is movably connected with the rear template, the cavity is arranged on the rear template, the surface of the cavity is provided with spark patterns, the core is arranged on the front template, and the side wall of the core is polished. The ejecting mechanism is movably connected with the rear template, the cavity is arranged on the rear template, the core is reversely arranged on the front template, the ejecting mechanism is suitable for the condition that a product needs to be left on the rear template for ejecting and demolding when some molds are separated, the fire patterns are arranged on the surface of the cavity to increase the tensile force, and the side wall of the core is polished to enable the product to be left on the rear template for ejecting and demolding normally.

Description

Injection mold with reversely arranged mold core

Technical Field

The utility model relates to the technical field of molds, in particular to an injection mold with a reversed core.

Background

An injection mold is a tool for producing plastic products; and is also a tool for giving the plastic product complete structure and accurate dimension. The injection molding is a processing mode of pressing a plastic material in a molten state into a mold cavity by adopting a high-pressure injection mode, cooling, shaping and solidifying to obtain a complex part, and the injection molding method has high production speed and high efficiency, and is suitable for the molding processing fields of mass production, products with complex shapes and the like.

At present, chinese patent with application number 201510640971.7 discloses an injection mold, which includes a bottom plate, a fixed mold, a first concave block, a movable mold plate, a first fixed mold core, a second fixed mold core, a sprue gate, a material pulling rod, a first movable mold core, a second movable mold core, a first guide sleeve, a first guide pillar, a first screw, a first pin, a push plate member, a movable mold base, a push rod fixing plate, a second screw, a second guide sleeve, a second guide pillar, a first push rod member, a second push rod member, a third push rod member, a support member, a reset mechanism, a screw member, and a cushion block; in the using process, the push rod of the injection molding machine pushes the push plate part to drive the first push rod part, the second push rod part and the third push rod part to enable the injection molding product to be separated from the mold cavity of the injection mold.

Although the injection mold improves the molding efficiency, the mold cores are respectively arranged on the fixed mold and the movable mold plate, products can be left on the fixed mold during mold separation, but the shapes of some products are easy to wrap the mold cores, and need to be left on the movable mold plate to be ejected out of the movable mold plate so as to be demolded, and the products are not beneficial to normal ejection and demolding of subsequent products when left on the fixed mold.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the injection mold with the inverted core, which has the advantage of being beneficial to demolding.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an injection mold that core is put conversely, includes the die carrier, locates the die carrier and to the preceding template and the back template that involution in opposite directions, be used for the core of shaping product internal surface, be used for the die cavity of shaping product surface to and locate the die carrier and be used for ejecting mechanism of product, ejecting mechanism and back template swing joint, the back template is seted up in the die cavity, the die cavity surface sets up the spark pattern, the preceding template is located to the core, the core lateral wall carries out polishing treatment.

By adopting the technical scheme, the ejecting mechanism is movably connected with the rear template, the cavity is arranged in the rear template, the core is arranged in the front template, the product is left on the rear template during mold splitting, the ejecting mechanism is convenient to eject the product for demolding, the fire patterns are arranged on the surface of the cavity, the pulling force is increased, the side wall of the core is polished, the product is left on the rear template, and ejection and demolding are normally performed.

Further, the rear template is movably connected with a mold clamping module forming the bottom surface of the cavity.

By adopting the technical scheme, the rear template is movably connected with the die assembly blocks forming the bottom surface of the cavity, and the die assembly blocks forming the cavity and the rear template are designed in a split manner, so that the rear template is convenient to maintain and replace.

Furthermore, one end of the mold clamping module, which is far away from the cavity, is connected with a pushing-out mechanism.

By adopting the technical scheme, one end, far away from the cavity, of the mold clamping block is connected with the pushing-out mechanism, and the pushing-out mechanism drives the mold clamping block to abut against the bottom surface of a product when ejecting the product, so that product demolding is facilitated.

Further, the mold core is detachably connected with the front mold plate.

By adopting the technical scheme, the mold core and the front mold plate are detachably connected, and the mold core and the front mold plate are designed in a split manner, so that the maintenance and the replacement are convenient.

Furthermore, the front template is provided with a guide pillar for positioning, and the rear template is provided with a guide sleeve matched with the guide pillar.

Compared with the prior art in which a guide device is usually arranged on the die carrier to guide the front die plate to be closed with the rear die plate, the technical scheme is adopted, the front die plate is also provided with a guide pillar for positioning, the rear die plate is provided with a guide sleeve matched with the guide pillar, the guide pillar and the guide sleeve are closer to the die cavity, the position of the front die plate and the rear die plate in the opposite process is more accurate, and the precision of product forming is improved.

Furthermore, the front template is connected with a main runner communicated with the injection molding machine, the rear template is provided with a pouring gate used for injecting plastic into the cavity, the front template and the rear template are respectively sunken inwards, and the sunken parts jointly form a sub-runner communicated with the main runner and the pouring gate.

By adopting the technical scheme, the front template is connected with the main runner communicated with the injection molding machine, the rear template is provided with the sprue used for injecting the plastic into the cavity, the front template and the rear template are respectively inwards recessed, the recessed parts jointly form the sub-runners communicated with the main runner and the sprue, the plastic is injected into the cavity from the main runner through the sprue via the sub-runners for molding, and the sub-runners are formed by the front template and the rear template, so that the product can be conveniently ejected.

Further, the pouring gate is arranged on the side wall of the cavity and inclines towards the bottom surface of the cavity.

By adopting the technical scheme, the pouring gate is arranged on the side wall of the cavity and inclines towards the bottom surface of the cavity, so that plastic can flow from the pouring gate to two sides conveniently, and the phenomenon of glue shortage is reduced.

Furthermore, the sub-runners extend along the diagonal direction of the rear mold plate to four corners and are respectively communicated with the four gates, and the four gates are correspondingly communicated with the four cavities.

For the perpendicular setting of runner among prior art, adopt above-mentioned technical scheme, runner extends along the diagonal direction four corners of back template, reduces the plastic and receives the uneven phenomenon of gravity influence distribution, communicates four runners respectively, and four runners correspond four die cavities of intercommunication, but four products of one shot forming have improved the efficiency of moulding plastics.

Further, the gate has a shape of a bull-horn gradually decreasing toward the cavity.

Adopt above-mentioned technical scheme, the runner has the ox horn shape that gradually diminishes to the die cavity, and the radian of the runner of ox horn shape helps the pressure of buffering injection moulding, reduces the ripple of injection moulding product, improves the quality of product.

Further, the front mold plate is provided with a chamfer for core installation guidance.

By adopting the technical scheme, the front template is provided with the chamfer, and the core is installed on the front template along the chamfer to play a role in guiding and facilitate the assembly of parts.

In conclusion, the utility model has the following beneficial effects:

1. the ejecting mechanism is movably connected with the rear template, the cavity is arranged on the rear template, the core is reversely arranged on the front template, the ejecting mechanism is suitable for the condition that a product needs to be left on the rear template for ejecting and demoulding when a plurality of moulds are separated, the surface of the cavity is provided with fire patterns to increase the pulling force, the side wall of the core is polished to enable the product to be left on the rear template for ejecting and demoulding normally;

2. the cavity and the core are designed separately, so that the maintenance and the replacement are convenient, and the service life of the die is prolonged;

3. alleviate the pressure of moulding plastics through setting up ox horn formula runner and reduce the production of ripple, improved the quality of product.

Drawings

FIG. 1 is a perspective view of an injection mold with cores reversed in the embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of section I of FIG. 2;

FIG. 4 is a right side view of a rear mold plate of an injection mold with inverted cores in an embodiment;

FIG. 5 is a left side view of a front mold plate of an injection mold with an inverted core in an embodiment.

In the figure: 1. a front template; 11. a core; 12. a guide post; 13. chamfering; 2. a rear template; 21. a cavity; 22. a guide sleeve; 23. a mold clamping module; 24. a gate; 3. a push-out mechanism; 4. a main flow channel; 5. a shunt channel; 6. a base plate; 7. cushion blocks; 8. a mold frame; 81. a front mold frame; 82. a rear mould frame; 9. a panel; 91. and (4) injection molding of the opening.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

An injection mold with inverted cores is disclosed, and referring to fig. 1, 2 and 3, the injection mold comprises a mold frame 8, a front mold plate 1, a rear mold plate 2, a mold core 11, a mold cavity 21 and a push-out mechanism 3, wherein the mold frame 8 is fixed on an injection molding machine, the front mold plate 1 is arranged on the mold frame 8, the rear mold plate 2 is arranged on the mold frame 8, the front mold plate 1 and the rear mold plate 2 are oppositely closed for forming a product, the push-out mechanism 3 is arranged on the mold frame 8, the push-out mechanism 3 is in sliding connection with the rear mold plate 2 for pushing out the product from the rear mold plate 2, the mold cavity 21 is arranged on the rear mold plate 2, the mold cavity 21 is used for forming the outer surface of the product, the mold core 11 is arranged on the front mold plate 1, the mold core 11 is used for forming the inner surface of the product, and is suitable for the condition that the product needs to be left on the rear mold plate 2 for pushing out during mold separation, the surface of the mold cavity 21 is provided with fire patterns, the side wall of the mold core 11 is polished, the friction force between the rear mold plate 2 and the product is increased, and the friction force between the mold core 11 and the product is reduced, this eliminates the need for the product to remain on the rear mold plate 2 for ejection and demolding during mold separation.

Referring to fig. 2, 3 and 5, the front template 1 is detachably connected with the core 11, the front template 1 is provided with a through hole for installing the core 11, the front template 1 is provided with a chamfer 13 for guiding the core 11 to be inserted into the through hole to be installed with the front template 1, the front template 1 is fixed with four guide posts 12, and the guide posts 12 are used for positioning when the front template 1 is involuted with the rear template 2.

Referring to fig. 2, 3 and 4, the rear mold plate 2 is movably connected with a mold clamping block 23, the mold clamping block 23 penetrates through the rear mold plate 2 and penetrates through the rear mold plate 2, one end, close to the front mold plate 1, of the mold clamping block 23 is flush with the mold cavity 21 to form the bottom surface of the mold cavity 21, one end, far away from the mold cavity 21, of the mold clamping block 23 is fixed to the ejecting mechanism 3, when the mold is separated, the mold clamping block 23 ejects a product along with the action of the ejecting mechanism 3, the rear mold plate 2 is provided with four guide sleeves 22 matched with the guide pillars 12, and the guide sleeves 22 are used for being matched with the guide pillars 12 to position when the front mold plate 1 and the rear mold plate 2 are closed.

Referring to figures 3 and 4 of the drawings, fig. 5, front template 1 is connected with the transition piece, the both ends of transition piece intercommunication forms sprue 4, the one end intercommunication injection molding machine of back template 2 is kept away from to sprue 4, sprue 4 is close to the one end that back template 2 was kept away from to sprue 4 wide in sprue 4, back template 2 sets up four runners 24 that are used for moulding plastics in to die cavity 21, runner 24 has the ox horn shape that gradually diminishes to die cavity 21, front template 1 and back template 2 are inwards sunken respectively, inwards sunken part forms four runners 5 jointly when front template 1 and back template 2 are involuted, the one end of four runners 5 assembles and communicates with sprue 4 one end that is close to back template 2, the other end of four runners 5 extends respectively with the bottom intercommunication in four runners 24 four corners along the diagonal of back template 2, the corner point of four runners 24 communicates the lateral wall of four die cavities 21, and inclines to the bottom surface of die cavity 21.

Referring to fig. 1 and 2, the mold frame 8 includes a front mold frame 81 and a rear mold frame 82, the front mold frame 81 is fixed to the injection molding machine, the rear mold frame 82 is slidably connected to the front mold frame 81 through a guide device, the front mold plate 1 is embedded into one side of the front mold frame 81 close to the rear mold frame 82, the front mold plate 1 is connected to the front mold frame 81 through a fastener, one side of the front mold frame 81 far from the rear mold frame 82 is fixedly connected to a panel 9, the panel 9 is provided with an injection port 91 communicated with a main runner 4, the injection port 91 is used for connecting a nozzle of the injection molding machine, the rear mold plate 2 is embedded into one side of the rear mold frame 82 close to the front mold frame 81, the rear mold plate 2 is connected to the rear mold frame 82 through a fastener, one side of the rear mold frame 82 far from the front mold frame 81 is fixedly connected to a bottom plate 6 through two cushion blocks 7, the two cushion blocks 7 and a push-out mechanism 3 are arranged between the rear mold frame 82 and the bottom plate 6, wherein the push-out mechanism 3 is arranged in the center, the two cushion blocks 7 are arranged on the upper and lower sides of the push-out mechanism 3, the two spacers 7 are used to support the rear platen 2 and give a stroke space for the ejector mechanism 3.

The working process and principle of the embodiment are as follows:

during operation, the guide post 12 is aligned with the guide sleeve 22 to be positioned, the rear template 2 and the front template 1 are closed, a nozzle of an injection molding machine is installed at an injection molding opening 91, plastic flows to a pouring gate 24 through a main runner 4 through four branch runners 5, then the plastic is poured into four cavities 21 from the pouring gate 24, the mold core 11 molds the inner surface of a product, the cavity 21 molds the outer surface of the product, the side wall of the mold core 11 arranged on the front template 1 is polished, the surface of the cavity 21 arranged on the rear template 2 is provided with spark patterns, after the product is molded, the rear template 2 is far away from the front template 1 to be separated, the product is left on the rear template 2, and ejection and demolding are carried out through the ejecting mechanism 3.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (10)

1. The utility model provides an injection mold that mould core is anti-put, includes die carrier (8), locate die carrier (8) and preceding template (1) and back template (2) that involutes in opposite directions, be used for core (11) of shaping product internal surface, be used for cavity (21) of shaping product surface to and locate die carrier (8) and be used for ejecting release mechanism (3) of product, its characterized in that: the ejecting mechanism (3) is movably connected with the rear template (2), the cavity (21) is arranged in the rear template (2), fire patterns are arranged on the surface of the cavity (21), the core (11) is arranged in the front template (1), and the side wall of the core (11) is polished.

2. The inverted core injection mold of claim 1, wherein: the rear template (2) is movably connected with a mold clamping module (23) forming the bottom surface of the cavity (21).

3. The inverted core injection mold of claim 2, wherein: one end of the mold clamping module (23) far away from the cavity (21) is connected with the pushing-out mechanism (3).

4. The inverted core injection mold of claim 1, wherein: the mold core (11) is detachably connected with the front mold plate (1).

5. The inverted core injection mold of claim 1, wherein: the front template (1) is also provided with a guide post (12) for positioning, and the rear template (2) is provided with a guide sleeve (22) matched with the guide post (12).

6. An injection mold with inverted core according to any of claims 1 to 5, wherein: the injection molding machine is characterized in that the front template (1) is connected with a main runner (4) communicated with the injection molding machine, the rear template (2) is provided with a pouring gate (24) used for injection molding in the cavity (21), the front template (1) and the rear template (2) are respectively sunken inwards, and the sunken parts jointly form a sub-runner (5) communicated with the main runner (4) and the pouring gate (24).

7. The inverted core injection mold of claim 6, wherein: the sprue (24) is arranged on the side wall of the cavity (21) and inclines towards the bottom surface of the cavity (21).

8. The inverted core injection mold of claim 6, wherein: the sub-runners (5) extend along the diagonal direction of the rear template (2) to four corners and are respectively communicated with the four gates (24), and the four gates (24) are correspondingly communicated with the four cavities (21).

9. The inverted core injection mold of claim 7, wherein: the gate (24) has a shape of a bull-horn gradually decreasing toward the cavity (21).

10. The inverted core injection mold of claim 4, wherein: the front template (1) is provided with a chamfer (13) for installing and guiding a core (11).

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