Expansion core structure of injection mold

Abstract

The utility model discloses an injection mold expansion core structure which comprises an upper code template, a lower code template and a product, upper mold square irons are arranged on the two sides of the bottom of the upper code template, a plate A is arranged at the bottoms of the two sets of upper mold square irons together, upper mold cores are arranged on the two sides of the bottom of the plate A, a cutter bottom plate is arranged in the middle of the bottom of the upper code template, and a cutter is arranged on the cutter bottom plate. A cutter fixing plate is arranged at the bottom of the cutter bottom plate; through mutual cooperation of the small pressing plate, the spring, the chip expansion piece, the BB sickle piece, the inner production base, the upper mold pressing pair A and the lower mold core, after the mold is improved, when an iron core assembly is placed, the mold core shrinks inwards so that a product can be conveniently placed in the mold, during mold closing, the chip expansion piece mechanism moves the chip expansion piece to be attached to the surface of the iron core, and it is guaranteed that when a mold cavity is filled with materials, the product quality is guaranteed. The inner surface of the iron core is clean, the secondary material cleaning procedure is reduced, and the product manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a kind of injection mold expansion core structure. BACKGROUND

[0002] Injection mold is a tool for producing plastic products;It is also a tool that gives plastic products complete structure and accurate size, and it is also a processing method used when mass-producing parts, mainly applied in industrial field. The injection mold process is to inject high-pressure molten material into the mold cavity, and after cooling and solidification, the shaped product is obtained. The injection mold core is a key component used in injection mold, which is usually made of metal material and plays a role in fixing and supporting.

[0003] The patent with the authorized announcement number "CN205272481U" discloses an iron core injection mold and an iron core, which comprises: a fixed mold core, a fixed mold core cavity is arranged on the fixed mold core; a movable mold core, a movable mold core cavity is arranged on the movable mold core, the movable mold core cavity cooperates with the fixed mold core cavity to form a product cavity, the movable mold core cavity comprises a plurality of tooth top cavities for accommodating a plurality of tooth tops and a plurality of inclined top cavities arranged on one side of the plurality of tooth top cavities and communicating with the tooth top cavities; and an inclined top mechanism, the inclined top mechanism comprises a plurality of inclined top pins, an inclined top pin plate and a driving device, the heads of the plurality of inclined top pins are arranged in the plurality of inclined top cavities and can move between a retracted position and an extended position, the tails of the plurality of inclined top pins are installed on the inclined top pin plate; the driving device is used for driving the inclined top pin plate. The iron core injection mold provided by the utility model can reduce labor cost and improve work efficiency, and can also ensure that the product does not have problems such as breakdown caused by poor installation of the plastic framework.

[0004] The above-mentioned mold core assembly needs a certain gap when being put into the mold, which leads to peak inside the injection time gap, and secondary cleaning is needed in the later stage, which increases the redundant cleaning process and leads to the increase of production cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an injection mold expansion core structure to solve the problems in the above-mentioned background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an injection mold expansion core structure, which comprises an upper mold plate, a lower mold plate and a product, upper mold square irons are arranged on both sides of the bottom of the upper mold plate, an A plate is arranged at the bottom of the two groups of upper mold square irons, upper mold cores are arranged on both sides of the bottom of the A plate, a cutter bottom plate is arranged at the middle of the bottom of the upper mold plate, a cutter fixing plate is arranged at the bottom of the cutter bottom plate, two groups of upper mold pressing pairs B are arranged at the bottom of the cutter fixing plate, and upper mold pressing pairs A are arranged at the top of the inner sides of the two groups of upper mold cores.

[0007] Two sides of the top of the lower die template are provided with lower die square irons, the top of the two groups of lower die square irons is commonly provided with a B plate, two sides of the top of the B plate are provided with lower die cores, the bottom of the inner side of the two groups of lower die cores is provided with lower die cores, the inner side of the lower die core is sleeved with an inner production base, the top of the outer side of the inner production base is provided with an inflation core piece, the inner side of the inner production base is provided with a BB head sickle piece, the bottom of the BB head sickle piece is provided with a pull rod, the middle of the top of the lower die template is provided with a lower die ejector pin bottom plate, the top of the lower die ejector pin bottom plate is provided with a lower die ejector pin fixed plate, the cutter bottom plate and the lower die ejector pin bottom plate are sleeved on the outer side of the pull rod, the bottom of the two groups of pull rods is provided with a small pressing plate, and the bottom of the small pressing plate is provided with a spring.

[0008] Preferably, two sides of the inner side of the small pressing plate are provided with lower die ejector pins extending to the inner side of the lower die core, and two groups of ejector pins extending to the inner side of the upper die core are arranged on both sides of the bottom of the cutter fixed plate, for adjusting the air pressure in the mold cavity, controlling the flow speed and flow route of the plastic material, so that the control of the injection molding quality is realized.

[0009] Preferably, two sides of the bottom of the upper die template close to the upper die square iron are provided with guide rods, and the guide rods are fixedly connected with the upper die template through bolts, and the cutter bottom plate and the cutter fixed plate are sleeved on the outer side of the guide rod, so as to guide the cutter bottom plate and the cutter fixed plate.

[0010] Preferably, both sides of the B plate are provided with a latch, and the inner side of the BB head sickle piece and the bottom of both sides of the lower die core are provided with a plug hole matched with the latch, so that the BB head sickle piece and the lower die core are fixed.

[0011] Preferably, the top of the inner side of the upper die pressing pair A is provided with a fixed bolt, and the top of the upper die core is provided with a threaded hole matched with the fixed bolt, so that the effect of the upper die pressing pair A can be improved.

[0012] Preferably, the diameter of the inflation core piece is the same as that of the top of the lower die core, so that the surface of the lower die core can be kept clean.

[0013] Preferably, the inner side of the upper die pressing pair A is provided with a clamping groove matched with the BB head sickle piece, and the top of the BB head sickle piece can be clamped into the clamping groove during mold closing.

[0014] Compared with the prior art, the injection mold inflation core structure of the utility model is characterized in that the small pressing plate, the spring, the inflation core piece, the BB head sickle piece, the inner production base, the upper die pressing pair A and the lower die core are matched with each other, so that after the mold is improved, when the iron core assembly is placed, the core is inwardly retracted to facilitate the product to be placed, and when the mold is closed, the inflation core piece mechanism moves the inflation core piece to be in contact with the iron core surface, so that the inner surface of the iron core is kept clean when the mold cavity is filled with material, the secondary cleaning process is reduced, and the product manufacturing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the front view of the utility model;

[0016] Fig. 2 It is the first perspective view of the lower mold core of the utility model;

[0017] Fig. 3 It is the second perspective view of the lower mold core of the utility model.

[0018] In the drawing: 1, upper die template; 2, upper die square iron; 3, cutter bottom plate; 4, cutter fixed plate; 5, ejector pin; 6, A plate; 7, upper die core; 8, lower die core; 9, bolt; 10, B plate; 11, pull rod; 12, lower die square iron; 13, lower die ejector pin fixed plate; 14, lower die ejector pin bottom plate; 15, small pressing plate; 16, spring; 17, lower die template; 18, product; 19, core expander; 20, BB head sickle piece; 21, inner product base; 22, upper die pressing pair A; 23, upper die pressing pair B; 24, lower die core; 25, lower die ejector pin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figs. 1-3 The utility model provides an embodiment: a kind of injection mold expansion core structure, including upper die template 1, lower die template 17 and product 18, the bottom of upper die template 1 two sides is provided with upper die square iron 2, the bottom of two groups of upper die square iron 2 is commonly provided with A plate 6, the bottom of A plate 6 two sides is provided with upper die core 7, the middle of upper die template 1 bottom is provided with cutter bottom plate 3, the bottom of cutter bottom plate 3 is provided with cutter fixed plate 4, the bottom of cutter fixed plate 4 is provided with two groups of upper die pressing pair B 23, the top of two groups of upper die core 7 inner side is provided with upper die pressing pair A 22;

[0021] Two sides of the top of the lower mold plate 17 are provided with lower mold square irons 12, the top of the two groups of lower mold square irons 12 is commonly provided with a B plate 10, two sides of the top of the B plate 10 are provided with lower mold cores 8, the bottom of the inner side of the two groups of lower mold cores 8 is provided with lower mold cores 24, the inner side of the lower mold core 24 is sleeved with an inner production base 21, the top of the outer side of the inner production base 21 is provided with an inflation core piece 19, the inner side of the inner production base 21 is provided with a BB head sickle piece 20, the bottom of the BB head sickle piece 20 is provided with a pull rod 11, the middle of the top of the lower mold plate 17 is provided with a lower mold ejector pin bottom plate 14, the top of the lower mold ejector pin bottom plate 14 is provided with a lower mold ejector pin fixed plate 13, the cutter bottom plate 3 and the lower mold ejector pin bottom plate 14 are sleeved on the outer side of the pull rod 11, the bottom of the two groups of pull rods 11 is provided with a small pressing plate 15, the bottom of the small pressing plate 15 is provided with a spring 16.

[0022] Further, the two sides of the inner side of the small pressing plate 15 are provided with lower mold ejector pins 25 extending to the inner side of the lower mold core 8, the two sides of the bottom of the cutter fixed plate 4 are respectively provided with two groups of ejector pins 5 extending to the inner side of the upper mold core 7, for adjusting the air pressure in the mold cavity, controlling the flow speed and flow route of the plastic material, so as to realize the control of the injection molding quality.

[0023] Further, the two sides of the bottom of the upper mold plate 1 close to the upper mold square iron 2 are provided with guide rods, and the guide rods are fixedly connected with the upper mold plate 1 through bolts, the cutter bottom plate 3 and the cutter fixed plate 4 are sleeved on the outer side of the guide rod, for guiding the cutter bottom plate 3 and the cutter fixed plate 4.

[0024] Further, the two sides of the B plate 10 are provided with a latch 9, the inner side of the BB head sickle piece 20 and the bottom of the two sides of the lower mold core 24 are provided with a plug hole matched with the latch 9, so as to facilitate the fixation of the BB head sickle piece 20 and the lower mold core 24.

[0025] Further, the top of the inner side of the upper mold pressing pair A22 is provided with a fixed bolt, the top of the upper mold core 7 is provided with a threaded hole matched with the fixed bolt, which can improve the effect of the upper mold pressing pair A22.

[0026] Further, the diameter of the inflation core piece 19 is the same as the top of the lower mold core 24, which can ensure the cleanliness of the surface of the lower mold core 24.

[0027] Further, the inner side of the upper mold pressing pair A22 is provided with a clamping groove matched with the BB head sickle piece 20, the top of the BB head sickle piece 20 can be clamped into the clamping groove during clamping.

[0028] Working principle: when the device is clamped, the upper die presses A22 which can be clamped with the BB head sickle piece 20, so that the BB head sickle piece 20 can push the pull rod 11 to move downward to overcome the elastic force of the spring 16, drive the expander core 19 to move downward and be combined with the surface of the lower mold core 24, so that there is no gap between the iron core and the mold, which ensures that the inner surface of the iron core is clean when the mold cavity is filled with material, reduces the secondary cleaning process, and reduces the product manufacturing cost.

[0029] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0030] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. An injection mold expansion core structure comprising an upper mold plate (1), a lower mold plate (17) and a product (18), characterized by: The upper die square iron (2) is arranged at the bottom of the upper die square iron (2), and the A plate (6) is arranged at the bottom of the A plate (6). The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10).

2. An injection mold expansion core structure according to claim 1, wherein: The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10).

3. An injection mold expansion core structure according to claim 1, wherein: The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10).

4. An injection mold expansion core structure according to claim 1, wherein: The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10).

5. An injection mold expansion core structure according to claim 1, wherein: The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10).

6. An injection mold expansion core structure according to claim 1, wherein: The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10).

7. An injection mold expansion core structure as defined in claim 1, wherein: The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10). The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10). The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10). The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10). The lower die square iron (12) is arranged at the top of the lower die square iron (12), and the B plate (10) is arranged at the top of the B plate (10). 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