CN211279548U

CN211279548U - Injection mold with excellent sealing performance

Info

Publication number: CN211279548U
Application number: CN201922104887.XU
Authority: CN
Inventors: 吴剑
Original assignee: Changzhou Haizhuo Precision Mold Co ltd
Current assignee: Changzhou Haizhuo Precision Mold Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-18
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to the technical field of molds, in particular to an injection mold with excellent sealing performance, which comprises a static template base, a static template, a movable template base, a movable template and the like, wherein the lower end surface of the movable template is connected with a rubber plate, and a second groove is arranged at the top of the static template corresponding to the rubber plate; a first pipeline is arranged in the static template, one end of the first pipeline is communicated with the inside of the second groove, and the other end of the first pipeline is fixedly connected with a vacuum pump; a second pipeline is arranged in the static template, one end of the second pipeline is communicated with the inside of the second groove, and the other end of the second pipeline is in threaded connection with the sealing cover; the rubber sheet and the second recess mutually support and form sealed cavity, and the sealed cavity is pumped into the vacuum through the vacuum pump, under the effect of inside and outside pressure difference, has improved injection mold's sealing pressure, guarantee injection mold's leakproofness.

Description

Injection mold with excellent sealing performance

Technical Field

The utility model belongs to the technical field of the mould technique and specifically relates to an injection mold with excellent leakproofness.

Background

The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate dimensions, and particularly relates to a method for injecting heated and molten plastic into a mold cavity from an injection molding machine at high pressure and obtaining a formed product after cooling and solidification. The injection mold is an important process equipment for producing various industrial products, and with the rapid development of the plastic industry and the popularization and application of plastic products in the industrial departments of aviation, aerospace, electronics, machinery, ships, automobiles and the like, the requirements of the products on the mold are higher and higher.

The movable mould plate is pushed by a push rod in the existing injection mould mostly, so that the movable mould plate and the static mould plate complete mould assembly and form a cavity.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an injection mold having excellent sealability, which is simple in structure, is provided.

The utility model provides a technical scheme that its technical problem adopted is: the movable formwork comprises a static formwork base, a static formwork, a movable formwork base and a movable formwork, wherein the upper end face of the static formwork base is fixedly connected with the static formwork, and the lower end face of the movable formwork base is fixedly connected with the movable formwork; the lower end face of the movable template is fixedly connected with a rubber plate, the cross section of the rubber plate is circular, the longitudinal section of the rubber plate is trapezoidal, a second groove is formed in the position, corresponding to the rubber plate, of the top of the static template, the inner side wall of the second groove is tightly attached to the outer side wall of the rubber plate, the depth of the second groove is larger than the height of the rubber plate, and a sealed cavity is formed between the second groove and the bottom of the rubber plate; first pipeline has been seted up to the inside of quiet template, the one end of first pipeline and the inside through connection of second recess, the other end and the vacuum pump fixed connection of first pipeline, the second pipeline has been seted up to the inside of quiet template, the one end of second pipeline and the inside through connection of second recess, the other end and the sealed threaded connection that covers of second pipeline.

The static template is fixedly connected with the sprue bush, the upper end face of the static template base is fixedly connected with the guide rod, the guide rod penetrates through the static template, and the upper end of the guide rod is connected with the movable template in a sliding mode.

Foretell injection mold with excellent leakproofness, the through-hole has been seted up at the middle part of movable mould board base, and the inside of through-hole is provided with the push pedal, push pedal and movable mould board base sliding connection, the lower terminal surface fixedly connected with many push rods of push pedal.

Foretell injection mold with excellent leakproofness, the lower terminal surface middle part fixedly connected with core of movable mould board, the top of quiet template corresponds the position department of core and has seted up first recess.

The injection mold with excellent sealing performance is characterized in that a sealing ring is fixedly arranged at the top of the static template, a groove is formed in the position, corresponding to the sealing ring, of the lower end face of the movable template, and the sealing ring is made of polyurethane rubber.

The sealing cover is fixedly sleeved with the sealing ring at one end close to the second pipeline, and the sealing ring is made of natural rubber.

The utility model has the advantages that:

1. injection mold is behind the compound die, and the rubber slab forms sealed cavity with first recess cooperation, installs the vacuum pump in the below of sealed cavity, and the vacuum pump is managed to find time with the air of sealed cavity department, makes this cavity become vacuum state, and under the effect of sealed cavity and external pressure difference, movable mould board and quiet template can receive great pressure and make the two closely laminate each other, make the utility model discloses possess profitable leakproofness.

2. The sealing ring on the static template is matched with the groove on the movable template, so that the injection mold has good sealing performance when being closed.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the utility model after mold closing;

FIG. 2 is a schematic view of the present invention before mold assembly;

FIG. 3 is an enlarged view of part A of the present invention 1;

fig. 4 is a partially enlarged view of portion B of fig. 1.

In the figure: 1. a stationary platen base; 2. a static template; 3. a sprue bush; 4. a guide bar; 5. a movable template base; 6. moving the template; 7. a through hole; 8. pushing the plate; 9. a push rod; 10. a core; 11. a first groove; 12. A rubber plate; 13. a second groove; 14. sealing the cavity; 15. a first conduit; 16. a second conduit; 17. A vacuum pump; 18. a sealing cover; 19. a seal ring; 20. and (4) a sealing ring.

Detailed Description

In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the present invention and are not to be considered as limiting, and that all other embodiments can be made by one of ordinary skill in the art without any inventive work.

Referring to fig. 1-4, an embodiment of the present invention discloses an injection mold with excellent sealing performance, including a stationary mold plate base 1, a stationary mold plate 2, a movable mold plate base 5, and a movable mold plate 6, wherein the stationary mold plate 2 is fixedly connected to an upper end surface of the stationary mold plate base 1, and the movable mold plate 6 is fixedly connected to a lower end surface of the movable mold plate base 5; the lower end face of the movable template 6 is fixedly connected with a rubber plate 12, the cross section of the rubber plate 12 is circular, the longitudinal section of the rubber plate 12 is trapezoidal, a second groove 13 is formed in the position, corresponding to the rubber plate 12, of the top of the static template 2, the inner side wall of the second groove 13 is tightly attached to the outer side wall of the rubber plate 12, the depth of the second groove 13 is larger than the height of the rubber plate 12, and a sealed cavity 14 is formed between the second groove 13 and the bottom of the rubber plate 12; a first pipeline 15 is arranged inside the static template 2, one end of the first pipeline 15 is communicated with the inside of the second groove 13, the other end of the first pipeline 15 is fixedly connected with a vacuum pump 17, a second pipeline 16 is arranged inside the static template 2, one end of the second pipeline 16 is communicated with the inside of the second groove 13, and the other end of the second pipeline 16 is in threaded connection with a sealing cover 18; the section of the sealing cover 18 is circular, the sealing cover 18 is made of rubber, an external thread is arranged at one end of the sealing cover, a static template 2 is fixedly connected to the upper end face of the static template base 1, the static template 2 is fixedly connected with the sprue bush 3, a guide rod 4 is fixedly connected to the upper end face of the static template base 1, the guide rod 4 penetrates through the static template 2, and the upper end of the guide rod 4 is in sliding connection with the movable template 6; the lower end face of the movable template base 5 is fixedly connected with a movable template 6, the middle part of the movable template base 5 is provided with a through hole 7, a push plate 8 is arranged in the through hole 7 and is in sliding connection with the movable template base 5, and the lower end face of the push plate 8 is fixedly connected with a plurality of push rods 9; the middle part of the lower end face of the movable template 6 is fixedly connected with a mold core 10, and a first groove 11 is formed in the position, corresponding to the mold core 10, of the top of the static template 2; a sealing ring 19 is fixedly arranged at the top of the static template 2, a groove is formed in the position, corresponding to the sealing ring 19, of the lower end face of the movable template 6, and the sealing ring 19 is made of polyurethane rubber; the end of the sealing cover 18 close to the second pipe 16 is fixedly sleeved with a sealing ring 20, and the sealing ring 20 is made of natural rubber.

In the specific use process, after the movable die plate 6 and the static die plate 2 are matched, the mold core 10 and the first groove 11 are matched to form a mold cavity, and the mold cavity is separated from the outside air by a sealing ring 19 between the movable die plate 6 and the static die plate 2, so that a first sealing measure is formed; the rubber plate 12 is tightly matched with the second groove 13 to form a second sealing measure; the rubber plate 12 is matched with the second groove 13 to form a sealed cavity 14, the vacuum pump 17 pumps air in the sealed cavity 14 out along the first pipeline 15 to enable the air to be in a vacuum state, and under the action of the pressure difference between the sealed cavity 14 and the outside, the pressure between the movable template 6 and the static template 2 is increased, so that a third sealing measure is formed; the sealing cover 18 is tightly connected with the outer end of the second pipeline 16 through threads in a matching way, so that outside air is prevented from entering the sealing cavity 14 through the second pipeline 16; at the moment, the injection molding machine continuously injects plastic melt into the cavity through the sprue bush 3, gas in the cavity is exhausted out of the injection molding mold through the exhaust system, after the plastic melt is cooled and molded, the vacuum pump 17 is closed, the sealing cover 18 is opened, air enters the sealing cavity 14 along the second pipeline 16, the movable mold plate 6 is separated from the static mold plate 2, the push plate 8 drives the push rod 9 to separate a molded plastic part from the movable mold plate 6, and after the molded plastic part is taken out, one-time working cycle is completed.

According to the above embodiment, the guide bar 4 is provided between the movable platen 6 and the stationary platen 2 to ensure that the movable platen 6 and the stationary platen 2 are not deviated when the molds are closed.

Based on the above embodiment, after the movable template 6 is separated from the static template 2, the bottom of the push plate 8 is symmetrically provided with a plurality of push rods 9, so that the stability of the formed plastic part and the movable template 6 during separation is ensured.

Based on the above embodiment, the sealing rings 20 are disposed at the outlets of the first pipe 15 and the second pipe 16, so as to prevent air from entering the sealed cavity 14, and further improve the sealing performance of the injection mold.

Based on the above embodiment, the material of the seal ring 19 is urethane rubber, and the urethane rubber has excellent wear resistance and good air impermeability.

Based on the above embodiment, the sealing ring 20 is made of natural rubber, and compared with most synthetic rubbers, natural rubber has good comprehensive mechanical properties, cold resistance, and high resilience and wear resistance.

Based on the above embodiment, one end of the sealing cover 18 is provided with a groove, the inner side wall of the groove is provided with an internal thread, and one end of the second pipeline 16 is provided with an external thread which can be screwed with the internal thread.

Based on the above-mentioned embodiment, the vacuum pump 17 is fixedly arranged on the ground, so as to ensure the stability of the vacuum pump 17 during operation, and the vacuum pump 17 is the prior art, and the specific structure thereof is not described herein.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an injection mold with excellent leakproofness, includes quiet template base (1), quiet template (2), movable mould board base (5), movable mould board (6), its characterized in that: the upper end face of the static template base (1) is fixedly connected with the static template (2), and the lower end face of the movable template base (5) is fixedly connected with the movable template (6); the lower end face of the movable template (6) is fixedly connected with a rubber plate (12), the cross section of the rubber plate (12) is circular, the longitudinal section of the rubber plate (12) is trapezoidal, a second groove (13) is formed in the position, corresponding to the rubber plate (12), of the top of the static template (2), the inner side wall of the second groove (13) is tightly attached to the outer side wall of the rubber plate (12), the depth of the second groove (13) is larger than the height of the rubber plate (12), and a sealed cavity (14) is formed between the second groove (13) and the bottom of the rubber plate (12); first pipeline (15) have been seted up to the inside of quiet template (2), the one end of first pipeline (15) with the inside through connection of second recess (13), the other end and vacuum pump (17) fixed connection of first pipeline (15), second pipeline (16) have been seted up to the inside of quiet template (2), the one end of second pipeline (16) with the inside through connection of second recess (13), the other end and the sealed lid (18) threaded connection of second pipeline (16).

2. An injection mold having excellent sealability as claimed in claim 1, wherein: the fixed die plate (2) is fixedly connected with the sprue bush (3), the upper end face of the fixed die plate base (1) is fixedly connected with a guide rod (4), the guide rod (4) penetrates through the fixed die plate (2), and the upper end of the guide rod (4) is connected with the movable die plate (6) in a sliding mode.

3. An injection mold having excellent sealability as claimed in claim 1, wherein: through-hole (7) have been seted up at the middle part of movable mould board base (5), the inside of through-hole (7) is provided with push pedal (8), push pedal (8) with movable mould board base (5) sliding connection, many push rods (9) of lower terminal surface fixedly connected with of push pedal (8).

4. An injection mold having excellent sealability as claimed in claim 1, wherein: the middle part of the lower end face of the movable template (6) is fixedly connected with a mold core (10), and a first groove (11) is formed in the position, corresponding to the mold core (10), of the top of the static template (2).

5. An injection mold having excellent sealability as claimed in claim 1, wherein: the top of the static template (2) is fixedly provided with a sealing ring (19), the lower end face of the movable template (6) is provided with a groove at a position corresponding to the sealing ring (19), and the sealing ring (19) is made of polyurethane rubber.

6. An injection mold having excellent sealability as claimed in claim 1, wherein: the sealing cover (18) is fixedly sleeved with a sealing ring (20) at one end close to the second pipeline (16), and the sealing ring (20) is made of natural rubber.