CN220163108U - Plastic shell injection mold - Google Patents

Abstract

The utility model discloses a plastic shell injection mold, which comprises a hydraulic cylinder, a supporting plate and a connecting shaft, wherein a movable module capable of being quickly disassembled and assembled is connected to the connecting shaft in a sliding manner; the movable module comprises a movable die cavity, a male die, a positioning hole, a material ejection assembly, a cooling assembly and a first locking and positioning assembly; the utility model has the advantages that: when the male die needs to be replaced, the output end of the first bidirectional cylinder of the first locking and positioning assembly extends out, the first bidirectional cylinder drives the first connecting shaft to move, the first connecting shaft drives the first connecting key to move, the first connecting piece drives the first fixing pin to separate from the first pin hole, then the male die is taken out, the male die which needs to be replaced is replaced, and similarly, the first fixing pin is inserted into the first pin hole again along with the retraction of the first bidirectional cylinder, so that the male die is fixed in the movable die cavity, and the quick replacement of the male die is realized.

Description

Plastic shell injection mold

Technical Field

The utility model relates to the technical field of plastic shell injection molding, in particular to a plastic shell injection mold.

Background

The injection molding of the die is a processing method used for mass production of parts with complex shapes, and the specific principle is as follows: the plastic raw material which is heated and melted is pushed by a screw rod of an injection molding machine to be injected into a die cavity of a plastic die under high pressure, after cooling and solidifying, a plastic forming product is obtained, the plastic die consists of a movable die and a fixed die, the movable die is arranged on a movable die plate of the injection molding machine, and the fixed die is arranged on a fixed die plate of the injection molding machine.

For example, chinese application patent with publication number CN214562584U discloses an injection mold for producing mobile phone plastic shell, through the cooperation of triangular block, guide rod, pulley, connecting bar and tension spring, make the round bar jack-up the shell in the mould groove to take out the shell, this kind of device, because terrace die, the die of mould are installed, fixed through multiunit bolt, therefore when the mobile phone plastic shell that needs the production model to be different, need demolish the multiunit fixing bolt of terrace die, die first, then change required mould, the operation process is loaded down with trivial details, can't realize the quick replacement of mould, can't satisfy special production demand.

Therefore, a new plastic housing injection mold is needed to meet the process requirements of plastic housing injection molding production.

Disclosure of Invention

The utility model aims to solve the problem of the defects in the prior art, and provides an injection mold for a plastic shell.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the plastic shell injection mold comprises a hydraulic cylinder, a supporting plate and a connecting shaft, wherein the hydraulic cylinder is fixedly connected to the supporting plate, and the connecting shaft is fixedly connected to the corner of the supporting plate;

the connecting shaft is connected with a movable module capable of being disassembled and assembled quickly in a sliding way, and the connecting shaft far away from the supporting plate is fixedly connected with a fixed module capable of being disassembled and assembled quickly;

the movable die set comprises a movable die cavity, a male die, a positioning hole, a material ejection assembly, a cooling assembly and a first locking positioning assembly, wherein the movable die cavity is fixedly connected with the output end of the hydraulic cylinder, the movable die cavity is slidably connected to the connecting shaft through a bearing, the cooling assembly is fixedly connected to the lower portion of the movable die cavity, the first locking positioning assembly is fixedly connected to the upper portion of the movable die cavity, the movable end of the first locking positioning assembly penetrates through the movable die cavity to be inserted with the male die, the male die is detachably installed in the movable die cavity, the positioning holes with the same size are formed in the corners of the male die, and the material ejection assembly is telescopically connected in the male die.

Preferably, a convex die groove is formed in the middle of the side wall of the movable die cavity, which is far away from the output end of the hydraulic cylinder, and the convex die is arranged in the convex die groove.

Preferably, the convex two sides of the male die are symmetrically provided with T-shaped grooves, the ejection assembly is arranged in the T-shaped grooves, the side surface of the male die, which is close to the movable end of the first locking and positioning assembly, is symmetrically provided with first pin holes, and the movable end of the first locking and positioning assembly is inserted into the first pin holes.

Preferably, the liftout subassembly includes T type liftout pole and spring, and T type liftout pole telescopic mounting is in T type inslot, and the thicker one end of T type liftout pole is unanimous with the height of the heavy notch of T type inslot, the left end fixed connection of spring is in T type inslot, the right-hand member and the T type liftout pole fixed connection of spring.

Preferably, the cooling assembly comprises a water inlet pipe, a water outlet pipe and a circulating water channel, wherein the water inlet pipe is fixedly connected to the lower part of the movable mold cavity, the water outlet pipe is fixedly connected to the movable mold cavity close to the water inlet pipe, one end of the circulating water channel is connected with the water inlet pipe, and the other end of the circulating water channel is connected with the water outlet pipe.

Preferably, the circulating water channel comprises two parts, one part of the circulating water channel is arranged in the movable mould cavity, the circulating water channel arranged in the movable mould cavity is respectively connected with the water inlet pipe and the water outlet pipe, the other part of the circulating water channel is arranged in the male mould, and the interface of the circulating water channel arranged in the male mould is correspondingly connected with the interface of the circulating water channel arranged in the movable mould cavity.

Preferably, the first locking positioning assembly comprises a first bidirectional cylinder, a first connecting shaft, a first connecting key and a first fixing pin, wherein the first bidirectional cylinder is fixedly connected to the upper part of the movable die cavity, one end of the first connecting shaft is fixedly connected with the driving end of the first bidirectional cylinder, the other end of the first connecting shaft is fixedly connected with the first connecting key, one end of the first fixing pin is fixedly connected with the first connecting key, and the other end of the first fixing pin penetrates through the movable die cavity to be inserted into the first pin hole.

Preferably, the cover half group includes fixed die cavity, die, locating pin and second locking locating component, and fixed die cavity fixed connection is on the connecting axle, and the die is dismantled and assembled and is installed in the fixed die cavity, and the locating pin that the four corners department fixedly connected with of die is the same in size, locating pin correspond the locating hole that sets up on with the terrace die, and the upper portion fixedly connected with second locking locating component of fixed die cavity, the expansion end of second locking locating component pass fixed die cavity and die grafting, and second locking locating component and first locking locating component symmetry set up.

Preferably, a die cavity is formed in the middle of the side wall, close to the male die, of the fixed die cavity, and the female die is arranged in the die cavity.

Preferably, the female die comprises a glue injection hole and a second pin hole, the middle part of the female die is provided with the glue injection hole, the side surface of the female die, which is close to the movable end of the second locking and positioning assembly, is provided with the second pin hole, and the movable end of the second locking and positioning assembly is inserted into the second pin hole.

Preferably, the second locking and positioning assembly comprises a second bidirectional cylinder, a second connecting shaft, a second connecting key and a second fixing pin, wherein the second bidirectional cylinder is fixedly connected to the upper part of the fixed die cavity, one end of the second connecting shaft is fixedly connected with the driving end of the second bidirectional cylinder, the other end of the second connecting shaft is fixedly connected with the second connecting key, one end of the second fixing pin is fixedly connected with the second connecting key, and the other end of the second fixing pin penetrates through the fixed die cavity to be inserted into the second pin hole.

Preferably, a glue injection groove for inserting the injection molding material pipe is formed in the middle of the side surface of the fixed mold cavity, which is far away from the female mold, and the glue injection groove is correspondingly arranged with the glue injection hole on the female mold.

Advantageous effects

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, when the male die needs to be replaced, the output end of the first bidirectional cylinder of the first locking and positioning assembly extends out, the first bidirectional cylinder drives the first connecting shaft to move, the first connecting shaft drives the first connecting key to move, the first connecting piece drives the first fixing pin to separate from the first pin hole, then the male die is taken out and replaced, meanwhile, as the first bidirectional cylinder retracts, the first fixing pin is reinserted in the first pin hole, the male die is fixed in the movable die cavity, the quick replacement of the male die is realized, and the second locking and positioning assembly can realize the quick replacement of the female die and meet production requirements.

2. In the utility model, when the mold is closed, the T-shaped ejector rod of the ejector component is retracted into the T-shaped groove of the male mold, the spring is in a compressed state, resilience force is generated, cooling water enters from the water inlet of the cooling component and flows out from the water outlet along the circulating water channel, rapid cooling of the male mold is realized, injection molding is accelerated, after the injection molding is finished, the hydraulic cylinder is retracted, the hydraulic cylinder drives the movable mold cavity to move, the movable mold cavity drives the male mold to move, and at the moment, the spring drives the T-shaped ejector rod to extend out of the T-shaped groove due to the resilience force of the spring, so that the molded injection molding male mold is ejected out, and automatic stripping is realized.

3. In the utility model, when the die is assembled, the T-shaped ejector rod of the ejector component is retracted into the T-shaped groove of the male die, the spring is in a compressed state, and generates resilience force, cooling water enters from the water inlet of the cooling component and flows out from the water outlet along the circulating water channel, so that the male die is rapidly cooled, and the injection molding is accelerated.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a perspective view of an injection mold for a plastic housing according to the present utility model;

FIG. 2 is a front view of an injection mold for plastic shells according to the present utility model;

FIG. 3 is a second perspective view of an injection mold for plastic shells according to the present utility model;

fig. 4 is a third perspective view of an injection mold for plastic shells according to the present utility model;

FIG. 5 is a right side view of an injection mold for plastic housings according to the present utility model;

FIG. 6 is a cross-sectional view of a plastic housing injection mold according to the present utility model taken along the direction A-A of FIG. 2;

FIG. 7 is a cross-sectional view of a plastic housing injection mold according to the present utility model taken along the B-B direction of FIG. 5;

fig. 8 is a partial enlarged view of a plastic housing injection mold of fig. 6 at C according to the present utility model.

The following is a reference numeral description:

1. a hydraulic cylinder; 2. a support plate; 3. a connecting shaft; 4. a movable module; 41. a moving mold cavity; 411. a male die groove; 42. a male die; 421. a T-shaped groove; 422. a first pin hole; 43. positioning holes; 44. a material ejection assembly; 441. a T-shaped material ejection rod; 442. a spring; 45. a cooling assembly; 451. a water inlet pipe; 452. a water outlet pipe; 453. a circulating water passage; 46. a first locking and positioning assembly; 461. a first bidirectional cylinder; 462. a first connecting shaft; 463. a first connection key; 464. a first fixing pin; 5. a fixed module; 51. a die cavity is fixed; 511. a die cavity; 52. a female die; 521. a glue injection hole; 522. a second pin hole; 53. a positioning pin; 54. the second locking and positioning assembly; 541. a second bidirectional cylinder; 542. a second connecting shaft; 543. a second connection key; 544. a second fixing pin; 6. and a glue injection groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-8 of the specification, an injection mold for plastic shells includes a hydraulic cylinder 1, a support plate 2 and a connecting shaft 3, wherein the hydraulic cylinder 1 is fixedly connected to the support plate 2, the connecting shaft 3 is fixedly connected to a corner of the support plate 2, a movable mold set 4 capable of being quickly assembled and disassembled is slidably connected to the connecting shaft 3, the movable mold set 4 includes a movable mold cavity 41, a male mold 42, a positioning hole 43, a material ejection assembly 44, a cooling assembly 45 and a first locking positioning assembly 46, the movable mold cavity 41 is fixedly connected to an output end of the hydraulic cylinder 1, the movable mold cavity 41 is slidably connected to the connecting shaft 3 through a bearing, a cooling assembly 45 is fixedly connected to a lower portion of the movable mold cavity 41, a first locking positioning assembly 46 is fixedly connected to an upper portion of the movable mold cavity 41, a movable end of the first locking positioning assembly 46 is inserted into the male mold 42 through the movable mold cavity 41, the male mold 42 is detachably mounted in the movable mold cavity 41, the corner of the male mold 42 is provided with the positioning hole 43 with the same size, and the material ejection assembly 44 is telescopically connected to the male mold 42.

When the movable die cavity 41 of the movable die set 4 is driven by the hydraulic cylinder 1 to move on the connecting shaft 3 during use, when the male die 42 needs to be replaced, the first locking and positioning assembly 46 is started, the movable end of the first locking and positioning assembly 46 inserted on the male die 42 is separated from the male die 42, at the moment, the male die 42 can be directly taken out from the movable die cavity 41, meanwhile, the required male die 42 is replaced, the first locking and positioning assembly 46 is started, the movable end of the first locking and positioning assembly 46 penetrates through the movable die cavity 41 to be inserted with the male die 42, the male die 42 is fixed in the movable die cavity 41, the quick replacement of the male die 42 is realized, and the production requirement is met.

The middle part of the side wall of the movable mould cavity 41 far away from the output end of the hydraulic cylinder 1 is provided with a convex mould slot 411, and the convex mould 42 is arranged in the convex mould slot 411.

T-shaped grooves 421 are symmetrically formed in two sides of the protrusion of the male die 42, the ejector component 44 is arranged in the T-shaped grooves 421, first pin holes 422 are symmetrically formed in the side face, close to the movable end of the first locking and positioning component 46, of the male die 42, and the movable end of the first locking and positioning component 46 is inserted into the first pin holes 422.

The ejector assembly 44 comprises a T-shaped ejector rod 441 and a spring 442, wherein the T-shaped ejector rod 441 is telescopically mounted in the T-shaped slot 421, the thicker end of the T-shaped ejector rod 441 is consistent with the height of the sinking slot of the T-shaped slot 421, the left end of the spring 442 is fixedly connected in the T-shaped slot 421, and the right end of the spring 442 is fixedly connected with the T-shaped ejector rod 441.

The cooling assembly 45 comprises a water inlet pipe 451, a water outlet pipe 452 and a circulating water channel 453, wherein the water inlet pipe 451 is fixedly connected to the lower portion of the movable mold cavity 41, the water outlet pipe 452 is fixedly connected to the movable mold cavity 41 close to the water inlet pipe 451, one end of the circulating water channel 453 is connected with the water inlet pipe 451, and the other end of the circulating water channel 453 is connected with the water outlet pipe 452.

The first locking and positioning assembly 46 comprises a first bidirectional air cylinder 461, a first connecting shaft 462, a first connecting key 463 and a first fixing pin 464, wherein the first bidirectional air cylinder 461 is fixedly connected to the upper portion of the movable mold cavity 41, one end of the first connecting shaft 462 is fixedly connected with the driving end of the first bidirectional air cylinder 461, the other end of the first connecting shaft 462 is fixedly connected with the first connecting key 463, one end of the first fixing pin 464 is fixedly connected with the first connecting key 463, and the other end of the first fixing pin 464 penetrates through the movable mold cavity 41 to be inserted into the first pin hole 422.

When in use, the hydraulic cylinder 1 drives the movable die cavity 41 to slide on the connecting shaft 3 to realize the opening and closing of the die, the first fixing pin 464 of the first locking and positioning assembly 46 is inserted into the first pin hole 422 of the male die 42, when the male die 42 needs to be replaced, the output end of the first bidirectional air cylinder 461 of the first locking and positioning assembly 46 extends out, the first bidirectional air cylinder 461 drives the first connecting shaft 462 to move, the first connecting shaft 462 drives the first connecting key 463 to move, the first connecting piece 463 drives the first fixing pin 464 to separate from the first pin hole 422, then the male die 42 is taken out, the male die 42 needs to be replaced, and similarly, the first fixing pin 464 is inserted into the first pin hole 422 again along with the retraction of the first bidirectional air cylinder 461, the male die 42 is fixed in the movable die cavity 41, and the quick replacement of the male die 42 is realized.

During die assembly, the T-shaped ejector rod 441 of the ejector assembly 44 is retracted into the T-shaped groove 421 of the male die 42, the spring 442 is in a compressed state, resilience force is generated, cooling water enters from the water inlet pipe 451 of the cooling assembly 45 and flows out from the water outlet pipe 452 along the circulating water channel 453, rapid cooling of the male die 42 is achieved, injection molding is accelerated, after injection molding is completed, the hydraulic cylinder 1 is retracted, the hydraulic cylinder 1 drives the movable die cavity 41 to move, the movable die cavity 41 drives the male die 42 to move, and at the moment, the spring 442 drives the T-shaped ejector rod 441 to extend out of the T-shaped groove 421 due to resilience force of the spring 442, so that the molded injection molding male die 42 is ejected, and automatic stripping is achieved.

And a fixed die set 5 which can be quickly disassembled and assembled is fixedly connected on the connecting shaft 3 far away from the supporting plate 2.

The fixed die set 5 comprises a fixed die cavity 51, a female die 52, a locating pin 53 and a second locking locating component 54, the fixed die cavity 51 is fixedly connected to the connecting shaft 3, the female die 52 is detachably installed in the fixed die cavity 51, locating pins 53 with the same size are fixedly connected to four corners of the female die 52, the locating pins 53 are correspondingly arranged with locating holes 43 formed in the male die 42, the second locking locating component 54 is fixedly connected to the upper portion of the fixed die cavity 51, the movable end of the second locking locating component 54 penetrates through the fixed die cavity 51 to be inserted into the female die 52, and the second locking locating component 54 and the first locking locating component 46 are symmetrically arranged.

When the female die 52 needs to be replaced, the first locking and positioning assembly 54 is started, the movable end of the first locking and positioning assembly 56 inserted on the female die 52 is separated from the female die 52, at this time, the female die 52 can be directly taken out from the female die 51, meanwhile, the female die 52 required for replacement is replaced, the first locking and positioning assembly 56 is started, the movable end of the first locking and positioning assembly 56 penetrates through the movable die cavity 51 to be inserted with the female die 52, the female die 52 is fixed in the movable die cavity 51, rapid replacement of the female die 52 is achieved, and production requirements are met.

The middle part of the side wall of the fixed die cavity 51, which is close to the male die 42, is provided with a die cavity 511, and a female die 52 is arranged in the die cavity 511.

The female die 52 comprises a glue injection hole 521 and a second pin hole 522, the middle part of the female die 52 is provided with the glue injection hole 521, the side surface of the female die 52, which is close to the movable end of the second locking and positioning assembly 54, is provided with the second pin hole 522, and the movable end of the second locking and positioning assembly 54 is inserted into the second pin hole 522.

The second locking and positioning assembly 54 comprises a second bidirectional cylinder 541, a second connecting shaft 542, a second connecting key 543 and a second fixing pin 544, wherein the second bidirectional cylinder 541 is fixedly connected to the upper portion of the fixed die cavity 51, one end of the second connecting shaft 542 is fixedly connected to the driving end of the second bidirectional cylinder 541, the other end of the second connecting shaft 542 is fixedly connected to the second connecting key 543, one end of the second fixing pin 544 is fixedly connected to the second connecting key 543, and the other end of the second fixing pin 544 penetrates through the fixed die cavity 51 to be inserted into the second pin hole 522.

During die assembly, the side wall of the female die 52 is in contact with the T-shaped ejector rod 441 of the ejector assembly 44, the T-shaped ejector rod 441 is pressed to retract into the T-shaped groove 421, the T-shaped ejector rod 441 presses the spring 442, the spring 442 is in a compressed state at the moment, resilience force is generated, after injection molding, the hydraulic cylinder 1 drives the movable die cavity 41 to be far away from the fixed die cavity 51, the die is opened, and at the moment, the spring 442 drives the T-shaped ejector rod 441 to extend out of the T-shaped groove 421 due to resilience force of the spring 442, so that the molded injection molding is ejected out of the male die 42, and automatic stripping is realized.

When the female die 52 needs to be replaced, the output end of the second bidirectional cylinder 541 of the second locking and positioning assembly 54 extends, the second bidirectional cylinder 541 drives the second connecting shaft 542 to move, the second connecting shaft 542 drives the second connecting key 543 to move, the second connecting piece 543 drives the second fixing pin 544 to separate from the second pin hole 522, then the female die 52 is taken out, the female die 52 needs to be replaced, and similarly, as the second bidirectional cylinder 541 retracts, the second fixing pin 544 is reinserted in the second pin hole 522, the female die 52 is fixed in the fixed die cavity 51, and the quick replacement of the female die 52 is realized.

In some embodiments, referring to fig. 1-8 of the specification, the circulating water channel 453 includes two parts, one part of the circulating water channel 453 is arranged in the moving mold cavity 41, the circulating water channel 453 arranged in the moving mold cavity 41 is respectively connected with the water inlet pipe 451 and the water outlet pipe 452, the other part of the circulating water channel 453 is arranged in the male mold 42, and the interface of the circulating water channel 453 arranged in the male mold 42 is correspondingly connected with the interface of the circulating water channel 453 arranged in the moving mold cavity 41.

In some embodiments, referring to fig. 1 to 8 of the specification, a glue injection groove 6 for inserting a plastic injection pipe is formed in the middle of a side surface of the fixed mold cavity 51, which is far away from the female mold 52, and the glue injection groove 6 is disposed corresponding to a glue injection hole 523 in the female mold 52.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art who is skilled in the art to which the present utility model pertains shall apply to the technical solution according to the present utility model and its inventive concept, and all equivalents and modifications are intended to be covered by the scope of the present utility model.

Claims (10)

1. The plastic shell injection mold comprises a hydraulic cylinder (1), a support plate (2) and a connecting shaft (3), wherein the hydraulic cylinder (1) is fixedly connected to the support plate (2), and the connecting shaft (3) is fixedly connected to the corner of the support plate (2);

the method is characterized in that: a movable module (4) capable of being quickly assembled and disassembled is connected on the connecting shaft (3) in a sliding way, and a fixed module (5) capable of being quickly assembled and disassembled is fixedly connected on the connecting shaft (3) far away from the supporting plate (2);

the movable die set (4) comprises a movable die cavity (41), a male die (42), a positioning hole (43), a jacking component (44), a cooling component (45) and a first locking positioning component (46), wherein the movable die cavity (41) is fixedly connected with the output end of the hydraulic cylinder (1), the movable die cavity (41) is slidably connected to the connecting shaft (3) through a bearing, the cooling component (45) is fixedly connected to the lower portion of the movable die cavity (41), the first locking positioning component (46) is fixedly connected to the upper portion of the movable die cavity (41), the movable end of the first locking positioning component (46) penetrates through the movable die cavity (41) to be spliced with the male die (42), the male die (42) is detachably arranged in the movable die cavity (41), the positioning hole (43) with the same size is formed in the corner of the male die (42), and the jacking component (44) is telescopically connected to the male die (42).

2. The plastic housing injection mold of claim 1, wherein: and a male die groove (411) is formed in the middle of the side wall of the movable die cavity (41) far away from the output end of the hydraulic cylinder (1), and the male die (42) is arranged in the male die groove (411).

3. The plastic housing injection mold of claim 2, wherein: t-shaped grooves (421) are symmetrically formed in two sides of the protrusion of the male die (42), the ejection assembly (44) is arranged in the T-shaped grooves (421), first pin holes (422) are symmetrically formed in the side face, close to the movable end of the first locking and positioning assembly (46), of the male die (42), and the movable end of the first locking and positioning assembly (46) is inserted into the first pin holes (422).

4. A plastic housing injection mold according to claim 3, wherein: the ejector assembly (44) comprises a T-shaped ejector rod (441) and a spring (442), the T-shaped ejector rod (441) is telescopically arranged in the T-shaped groove (421), the thicker end of the T-shaped ejector rod (441) is consistent with the height of a sinking slot of the T-shaped groove (421), the left end of the spring (442) is fixedly connected in the T-shaped groove (421), and the right end of the spring (442) is fixedly connected with the T-shaped ejector rod (441).

5. The plastic housing injection mold of claim 4, wherein: the cooling assembly (45) comprises a water inlet pipe (451), a water outlet pipe (452) and a circulating water channel (453), wherein the water inlet pipe (451) is fixedly connected to the lower portion of the movable mold cavity (41), the water outlet pipe (452) is fixedly connected to the movable mold cavity (41) close to the water inlet pipe (451), one end of the circulating water channel (453) is connected with the water inlet pipe (451), and the other end of the circulating water channel (453) is connected with the water outlet pipe (452).

6. The plastic housing injection mold of claim 5, wherein: the first locking positioning assembly (46) comprises a first bidirectional cylinder (461), a first connecting shaft (462), a first connecting key (463) and a first fixing pin (464), wherein the first bidirectional cylinder (461) is fixedly connected to the upper portion of the movable die cavity (41), one end of the first connecting shaft (462) is fixedly connected with the driving end of the first bidirectional cylinder (461), the other end of the first connecting shaft (462) is fixedly connected with the first connecting key (463), one end of the first fixing pin (464) is fixedly connected with the first connecting key (463), and the other end of the first fixing pin (464) penetrates through the movable die cavity (41) to be inserted into the first pin hole (422).

7. The plastic housing injection mold of claim 6, wherein: the fixed die set (5) comprises a fixed die cavity (51), a female die (52), a positioning pin (53) and a second locking positioning assembly (54), wherein the fixed die cavity (51) is fixedly connected to the connecting shaft (3), the female die (52) is detachably arranged in the fixed die cavity (51), the positioning pin (53) with the same size is fixedly connected to four corners of the female die (52), the positioning pin (53) is correspondingly arranged with a positioning hole (43) formed in the male die (42), the second locking positioning assembly (54) is fixedly connected to the upper portion of the fixed die cavity (51), the movable end of the second locking positioning assembly (54) penetrates through the fixed die cavity (51) to be spliced with the female die (52), and the second locking positioning assembly (54) and the first locking positioning assembly (46) are symmetrically arranged.

8. The plastic housing injection mold of claim 7, wherein: the middle part of the side wall of the fixed die cavity (51) close to the male die (42) is provided with a female die groove (511), and the female die (52) is arranged in the female die groove (511).

9. The plastic housing injection mold of claim 7 or 8, wherein: the female die (52) comprises a glue injection hole (521) and a second pin hole (522), the middle part of the female die (52) is provided with the glue injection hole (521), the side surface of the female die (52) close to the movable end of the second locking and positioning assembly (54) is provided with the second pin hole (522), and the movable end of the second locking and positioning assembly (54) is inserted into the second pin hole (522).

10. The plastic housing injection mold of claim 9, wherein: the second locking positioning assembly (54) comprises a second bidirectional cylinder (541), a second connecting shaft (542), a second connecting key (543) and a second fixing pin (544), wherein the second bidirectional cylinder (541) is fixedly connected to the upper portion of the fixed die cavity (51), one end of the second connecting shaft (542) is fixedly connected with the driving end of the second bidirectional cylinder (541), the other end of the second connecting shaft (542) is fixedly connected with the second connecting key (543), one end of the second fixing pin (544) is fixedly connected with the second connecting key (543), and the other end of the second fixing pin (544) penetrates through the fixed die cavity (51) to be inserted into the second pin hole (522).