CN218985566U - Injection mold for precision parts - Google Patents

Abstract

The utility model discloses an injection mold for precision parts, wherein a cavity for injecting glue solution is formed between an upper mold core and a lower mold core, a sliding seat is slidably arranged on the outer side of the lower mold core on a lower mold plate, a first insert capable of being embedded into the cavity is arranged on the end face of the sliding seat facing the lower mold core, one end of a constant-height screw is in threaded connection with the first insert, a flange part at the other end is embedded into a horizontal sliding groove arranged on the sliding seat, a guide block is embedded into the first insert, the end face of the guide block, which is far away from the lower mold core, is fixedly connected with the sliding seat, the upper surface of one side, which is far away from the sliding seat, of the guide block is an inclined surface which is inclined downwards in the direction of approaching the lower mold core, and the lower surface of a second insert arranged above the guide block is in adhesive joint and sliding fit with the inclined surface on the guide block. The utility model not only can mold injection molding parts with complex structures, but also is convenient for ejecting and demolding the molded parts.

Description

Injection mold for precision parts

Technical Field

The utility model relates to the technical field of injection molding, in particular to an injection mold of a precision part.

Background

With the development of industrial technology, injection molds are one of the most widely used molds in current industrial production. Injection molding refers to injecting a heated and melted material into a mold cavity under high pressure, and cooling and solidifying the material to obtain a molded product. The injection mold consists of a movable mold and a fixed mold, wherein the movable mold is arranged on a movable mold plate of the injection molding machine, and the fixed mold is arranged on a fixed mold plate of the injection molding machine. The movable mould and the fixed mould are closed to form a pouring system and a cavity during injection molding, and the movable mould and the fixed mould are separated during mould opening so as to take out plastic products.

When injection molding a plastic part with a hole, a recess, a boss and the like on the side wall, the part formed on the mold must be made into a part capable of moving laterally, namely a movable core, and the movable core is drawn out before demolding the plastic part, otherwise, demolding is impossible. The whole mechanism for driving the movable core to move laterally is called a lateral parting and core pulling mechanism, and is called a lateral core pulling mechanism for short. The inclined guide post side core pulling mechanism transmits mold opening force to the side mold core or the side forming block by utilizing parts such as the inclined guide post and the like, so that the side mold core or the side forming block generates side movement to complete core pulling and parting actions. The side core pulling mechanism has the characteristics of compact structure, safe and reliable action and convenient processing and manufacturing, and is the most commonly used mechanism for designing and manufacturing the injection mold core pulling. However, when the part structure is complicated, the situation that glue injected into the cavity is cooled and molded on the outer side of the side core, so that the side core cannot loose core or the side core cannot damage the part can occur.

Disclosure of Invention

The utility model aims to provide an injection mold for precision parts, which not only can be used for molding injection parts with complex structures, but also can be used for effectively giving way to the part area which is injected into a sub-cavity between the upper part of a second insert and a first insert and molded, and is convenient for ejecting and demolding the molded parts.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an injection mold for precision parts, comprising: when the upper die plate is in a die closing state, a cavity for injecting glue solution is formed between the upper die plate and the lower die plate, a sliding seat is slidably arranged on the lower die plate and positioned on the outer side of the lower die plate, the sliding seat can reciprocate in a direction close to or far away from the lower die plate, an inclined guide groove which is vertically penetrated is formed in the upper surface of the sliding seat, an inclined guide post which is inclined in the same direction as the inclined guide groove is arranged on the upper die plate, and the lower end of the inclined guide post, connected with the upper die plate, is inclined in a direction far away from the upper die plate and can be embedded into the inclined guide groove;

the guide block is arranged in the first insert in an embedded manner, the end face of the guide block, close to the lower mold core, is flush with the end face of the first insert, far away from the lower mold core, is fixedly connected with the sliding seat, the upper surface of one side, far away from the sliding seat, is an inclined surface which is inclined downwards in the direction, close to the lower mold core, of the guide block, the lower surface of a second insert arranged above the guide block is in fit with the inclined surface on the guide block in an adhering manner, and is in sliding fit, and one end, far away from the lower mold core, of the second insert is provided with a protruding part which extends vertically upwards and is embedded into a stop groove, which is vertically arranged in the first insert.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, a sub-cavity into which glue solution is injected is formed between the first insert and the second insert, one end of which is embedded into the cavity.

2. In the above scheme, the first insert is connected with the sliding seat through a spring in an extrusion state.

3. In the above scheme, one end of the spring is embedded into a containing groove horizontally arranged on the sliding seat, and the other end of the spring is connected with the first insert.

4. In the scheme, 2 springs are arranged.

5. In the scheme, one end of the second insert close to the lower mold core extends outwards from the first insert.

6. In the above scheme, the lower surface of the second insert is connected with the upper surface of the guide block in a matched manner through a group of convex strips and strip-shaped grooves.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model relates to an injection mold of a precision part, wherein a first insert capable of being embedded into a cavity is arranged on the end face of a sliding seat facing a lower mold core, one end of an equal-height screw is in threaded connection with the first insert, a flange part at the other end of the equal-height screw is embedded into a horizontal chute arranged on the sliding seat and can reciprocate in the horizontal chute, a guide block is embedded and arranged in the first insert, the end face of the guide block, which is close to the lower mold core, is flush with the end face of the first insert, which is close to the lower mold core, the end face of the guide block, which is far from the lower mold core, is fixedly connected with the sliding seat, the upper surface of one side, which is far from the sliding seat, is an inclined surface which is inclined downwards in the direction, is close to the lower mold core, a lower surface of a second insert arranged above the guide block is in contact with and sliding fit with the inclined surface on the guide block, one end, which is far from the lower mold core, is provided with a vertically upwards extending protruding part, the bulge part is embedded into the stop groove vertically arranged in the first insert, and through the cooperation between the inclined guide groove arranged on the sliding seat and the inclined guide post which moves up and down along with the upper template relative to the sliding seat, the sliding seat can be driven to move away from or close to the lower mold core and drive the first insert, the second insert or away from the cavity or close to and insert into the cavity while the mold is opened and closed, so that injection molded parts with complex structures can be formed through the cooperation of the first insert, the second insert and the upper mold core and the lower mold core, and the second insert can be downwards moved for a certain stroke before being outwards pulled out from the cavity along with the sliding seat away from the lower mold core, thereby realizing effective abdication of a part area which is injected into and formed in a sub-cavity between the upper part of the second insert and the first insert, and facilitating ejection and demolding of the molded parts; further, the first insert is connected with the sliding seat through a spring in an extrusion state, and when the movable block moves along with the sliding seat in a direction away from the lower mold core and the first insert is kept still, the sliding seat is ensured to be gradually separated from the first insert, so that the first insert is prevented from moving along with the sliding seat and driving the second insert to move to damage a part structure in the sub-cavity.

Drawings

FIG. 1 is a schematic diagram of a structure of an injection mold for precision parts of the utility model in a state of opening a screen;

FIG. 2 is a schematic view showing the structure of an injection mold of a precision part of the utility model in a bottom view in a state of opening;

FIG. 3 is a schematic view of a partial structure of an injection mold of an inventive precision part in a closed-curtain state;

FIG. 4 is a schematic view showing a partial structure in a sectional view of an injection mold of an inventive precision part in a closed-curtain state;

fig. 5 is a schematic sectional view of a part of the injection mold of the precision part of the utility model in a state of being opened.

In the above figures: 100. an upper template; 101. an upper mold core; 200. a lower template; 201. a lower mold core; 202. a mounting groove; 203. a clearance groove; 1. a sliding seat; 21. a first insert; 211. a stop groove; 22. a second insert; 221. a boss; 3. an inclined guide groove; 4. oblique guide posts; 5. a limiting block; 6. a gasket; 7. a guide rail; 8. a contour screw; 81. a flange portion; 9. a horizontal chute; 10. a guide block; 11. a spring; 111. a receiving groove; 121. a convex strip; 122. a bar-shaped groove.

Detailed Description

The present patent will be further understood by the specific examples given below, which are not intended to be limiting.

Example 1: an injection mold for precision parts, comprising: when the upper die plate 100 provided with the upper die core 101 and the lower die plate 200 provided with the lower die core 201 are in a die assembly state, a cavity for injecting glue solution is formed between the upper die core 101 and the lower die core 201, a sliding seat 1 is slidably arranged on the lower die plate 200 and positioned on the outer side of the lower die core 201, the sliding seat 1 can reciprocate in a direction approaching or separating from the lower die core 201, an inclined guide groove 3 penetrating up and down is formed on the upper surface of the sliding seat 1, an inclined guide column 4 inclined in the same direction as the inclined guide groove 3 is arranged on the upper die plate 100, and the lower end of the inclined guide column 4 connected with the upper die plate 100 is inclined in a direction separating from the upper die core 101 and can be embedded into the inclined guide groove 3;

the end face of the sliding seat 1, which faces the lower mold core 201, is provided with a first insert 21 capable of being embedded into a cavity, one end of an equal-height screw 8 is in threaded connection with the first insert 21, a flange part 81 at the other end of the equal-height screw 8 is embedded into a horizontal sliding groove 9 formed in the sliding seat 1 and can reciprocate in the horizontal sliding groove 9, the first insert 21 is embedded with a guide block 10, the end face of the guide block 10, which is close to the lower mold core 201, is flush with the end face of the first insert 21, which is close to the lower mold core 201, is fixedly connected with the sliding seat 1, the upper surface of one side, which is far from the sliding seat 1, of the guide block 10 is an inclined surface which is inclined downwards in the direction, which is close to the lower mold core 201, a lower surface of a second insert 22 arranged above the guide block 10 is in an inclined surface joint and is matched with the inclined surface on the guide block 10 in a vertically upwards extending bulge 221, the end, which is far from the lower mold core 201, is embedded into the first insert 21, is in a vertically upwards extending bulge 221, the vertically extending in the first insert 21, the length of the second insert is smaller than the vertically extending upward stop groove 211.

A sub-cavity for injecting glue solution is formed between the first insert 21 and the second insert 22 with one end embedded into the cavity; the first insert 21 is connected with the sliding seat 1 through a spring 11 in a pressed state;

one end of the spring 11 is embedded into a containing groove 111 horizontally arranged on the sliding seat 1, and the other end of the spring 11 is connected with the first insert 21; the number of the springs 11 is 2, when the movable block moves along with the sliding seat in a direction away from the lower mold core, a relative sliding friction force is generated between the second insert and the guide block fixedly connected to the sliding seat, and the friction force has an outward component force to enable the first insert to move outwards, so that the first insert is kept motionless through the springs in a compressed state, the first insert is ensured to move outwards along with the sliding seat after the sliding seat and the first insert are gradually separated to a maximum distance, and the first insert is prevented from moving along with the second insert and driving the second insert to move to damage a part structure in the sub mold cavity.

Example 2: an injection mold for precision parts, comprising: when the upper die plate 100 provided with the upper die core 101 and the lower die plate 200 provided with the lower die core 201 are in a die assembly state, a cavity for injecting glue solution is formed between the upper die core 101 and the lower die core 201, a sliding seat 1 is slidably arranged on the lower die plate 200 and positioned on the outer side of the lower die core 201, the sliding seat 1 can reciprocate in a direction approaching or separating from the lower die core 201, an inclined guide groove 3 penetrating up and down is formed on the upper surface of the sliding seat 1, an inclined guide column 4 inclined in the same direction as the inclined guide groove 3 is arranged on the upper die plate 100, and the lower end of the inclined guide column 4 connected with the upper die plate 100 is inclined in a direction separating from the upper die core 101 and can be embedded into the inclined guide groove 3;

a first insert 21 which can be embedded into a cavity is arranged on the end face of the sliding seat 1 facing the lower mold core 201, one end of an equal-height screw 8 is in threaded connection with the first insert 21, a flange part 81 at the other end of the equal-height screw 8 is embedded into a horizontal sliding groove 9 arranged on the sliding seat 1 and can reciprocate in the horizontal sliding groove 9, a guide block 10 is embedded into the first insert 21, the end face of the guide block 10 close to the lower mold core 201 is flush with the end face of the first insert 21 close to the lower mold core 201, the end face of the guide block 10 far from the lower mold core 201 is fixedly connected with the sliding seat 1, the upper surface of one side of the guide block 10 far from the sliding seat 1 is an inclined surface which is inclined downwards in the direction close to the lower mold core 201, the lower surface of a second insert 22 arranged above the guide block 10 is in engagement and sliding fit with the inclined surface on the guide block 10, one end of the second insert 22 far from the lower mold core 201 is provided with a protruding part 221 which extends vertically upwards, and the protruding part 221 is embedded into a stop groove 211 which is arranged vertically and is arranged in the first insert 21;

through the cooperation of seting up between the oblique guide slot on the sliding seat and the oblique guide pillar that reciprocates along with the relative sliding seat of cope match-plate pattern, can be when opening and shutting the mould, drive the sliding seat to keep away from or be close to the direction of lower mold core and remove and drive first income, the second income or keep away from the die cavity or be close to and imbed the die cavity, both can be through the complex injection molding part of cooperation shaping structure of first income, second income and upper and lower mold core, can realize again that the second income is along with the sliding seat keeping away from the lower mold core and before outwards taking out from the die cavity, first downward movement one section stroke, realize the effective abdicating to the injection mould type intracavity between second income upper portion and the first income and the fashioned part region, be convenient for to the ejecting drawing of patterns to the part after the shaping.

One end of the second insert 22, which is close to the lower mold core 201, extends out from the first insert 21; the lower surface of the second insert 22 is connected with the upper surface of the guide block 10 in a matching way through a group of raised strips 111 and a strip-shaped groove 112;

the strip-shaped groove 122 formed on the lower surface of the second insert 22 is a strip-shaped dovetail groove;

one end of the guide block 10 far away from the lower mold core 201 is embedded into the sliding seat 1 and fixedly connected with the sliding seat 1 through bolts;

the number of the equal-height screws 8 is 2, and the equal-height screws are arranged at intervals in the vertical direction; the second insert 22 has an inclined surface on its upper surface and an inclination angle corresponding to the lower surface, and the first insert 21 has an inclined surface on its upper surface contacting the second insert 22.

When the injection mold of the precision part is adopted, the working principle is as follows:

when the die is closed, the upper die plate drives the inclined guide post to move downwards relative to the lower die plate, in the process, the lower end of the inclined guide post is firstly embedded into the inclined guide groove, so that in the process that the upper die plate drives the inclined guide post to gradually move downwards, the sliding seat provided with the first insert and the second insert is driven to move downwards in the direction of the die core until the first insert and the second insert are completely embedded into the die cavity through the matching of the inclined guide post and the inclined guide groove arranged on the sliding seat;

injecting glue into a cavity with a first insert and a second insert, wherein the first insert and the second insert are used as a part of a mold core to assist in forming a local area of an injection molded part, however, after the injected glue flows into a sub-cavity between the first insert and the second insert and is cooled and formed, interference is formed on the second insert, and the second insert cannot be directly pulled out;

cooling and molding the injection molding part, and opening the mold;

when the die is opened, the upper die plate drives the inclined guide post to move upwards relative to the lower die plate, the inclined guide post is gradually pulled out from the inclined guide groove, so that the sliding seat provided with the movable insert is driven to move away from the lower die core, in the process, the guide block with the inclined upper surface always moves away from the lower die core along with the sliding seat, the first insert cannot move along with the sliding seat for the first time due to the arrangement of the horizontal sliding groove on the sliding seat, in the process, the inclined lower surface of the second insert and the upper surface of the guide block moving away from the lower die core generate relative movement, the second insert moves downwards for a certain stroke until the stroke of the flange part of the equal-height screw in the horizontal sliding groove is completed, and the flange part of the equal-height screw is in mortice contact with one end of the horizontal sliding groove, which is close to the lower die core;

the sliding seat continuously moves in the direction away from the lower mold core, and the first and second inserts move along with the sliding seat in the direction away from the lower mold core until the first and second inserts are completely extracted from the cavity, so that multi-dimensional interference between the first and second inserts and the molded injection molding part is prevented, and ejection and demolding of the injection molding part are influenced;

the sliding seat is driven to move away from or close to the lower mold core and drive the first insert and the second insert or to move away from or close to and embed into the mold cavity by matching the first insert, the second insert and the upper mold core and the lower mold core to form an injection molding part with complex structure, and the second insert can move downwards for a certain stroke along with the sliding seat away from the lower mold core and before being pulled out from the mold cavity, so that effective abdication of a part region which is injected into a part cavity between the upper part of the second insert and the first insert and is formed is realized, and ejection and demolding of the formed part are facilitated;

when the movable block moves along with the sliding seat in a direction away from the lower mold core and the first insert is kept still, the sliding seat is ensured to be gradually separated from the first insert, and the first insert is prevented from moving along with the second insert to drive the second insert to move so as to damage a part structure in the sub-mold cavity.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (7)

1. An injection mold for precision parts, comprising: an upper die plate (100) provided with an upper die core (101) and a lower die plate (200) provided with a lower die core (201), when in a die closing state, a cavity for injecting glue solution is formed between the upper die core (101) and the lower die core (201), and the die is characterized in that: a sliding seat (1) is slidably arranged on the lower die plate (200) and positioned on the outer side of the lower die core (201), the sliding seat (1) can reciprocate in the direction approaching or separating from the lower die core (201), an inclined guide groove (3) which penetrates up and down is formed in the upper surface of the sliding seat (1), an inclined guide pillar (4) which is inclined in the same direction as the inclined guide groove (3) is arranged on the upper die plate (100), and the lower end of the inclined guide pillar (4) which is connected with the upper die plate (100) is inclined in the direction separating from the upper die core (101) and can be embedded into the inclined guide groove (3);

the utility model discloses a mould for making a plastic bag, including sliding seat (1), lower mould core (201) and lower mould core (201), install a first income son (21) of embedding in the die cavity on the terminal surface of sliding seat (1), the one end of equal altitude screw (8) with first income son (21) threaded connection, the flange portion (81) embedding of the other end of equal altitude screw (8) is offered in horizontal spout (9) on sliding seat (1) to can reciprocate in this horizontal spout (9), first income son (21) are embedded installs a guide block (10), and the terminal surface that this guide block (10) is close to lower mould core (201) is close to the terminal surface that lower mould core (201) is close to lower mould core (201) and first income son (21), the terminal surface that lower mould core (201) were kept away from to guide block (10) and sliding seat (1) fixed connection, the upper surface that guide block (10) kept away from one side is the inclined plane of being close to lower mould core (201) in the direction downward sloping to one set up in the lower surface that second income son (22) above guide block (10) and the perpendicular downthehole son (21) of sliding block (21) are located and are kept away from in the protruding portion (221) of falling.

2. The injection mold for precision parts according to claim 1, wherein: one end of the sub-cavity is embedded into the cavity, and a sub-cavity for injecting glue solution is formed between the first insert (21) and the second insert (22).

3. The injection mold for precision parts according to claim 1, wherein: the first insert (21) is connected with the sliding seat (1) through a spring (11) in an extrusion state.

4. An injection mold for precision parts according to claim 3, characterized in that: one end of the spring (11) is embedded into a containing groove (111) horizontally arranged on the sliding seat (1), and the other end of the spring (11) is connected with the first insert (21).

5. The injection mold for precision parts according to claim 3 or 4, characterized in that: the springs (11) are provided with 2 springs.

6. The injection mold for precision parts according to claim 1, wherein: one end of the second insert (22) close to the lower mold core (201) extends outwards from the first insert (21).

7. The injection mold for precision parts according to claim 1, wherein: the lower surface of the second insert (22) is connected with the upper surface of the guide block (10) in a matched mode through a group of raised strips (121) and strip-shaped grooves (122).

Images