Injection mold for outer shell of front top lamp of automobile and injection molding method of injection mold

Abstract

The invention relates to the technical field of plastic injection molding equipment, and discloses an injection mold for an outer shell of an automobile front top lamp and an injection molding method thereof.The injection mold comprises a working table, a plurality of supporting bases are fixedly connected to the bottom of the working table, and a plurality of sliding columns are fixedly connected to the position over the working table. According to the device, when an extrusion pin roller and an extrusion inclined plate II extrude each other, the extrusion inclined plate II drives one end of an extrusion inclined plate I to slide upwards along a limiting column, the extrusion inclined plate I drives a plurality of ejection sliding plates on a sliding ejection plate to move upwards, and at the moment, the ejection sliding plates drive a plurality of ejection columns to eject out connecting columns in connecting holes upwards along the connecting holes; meanwhile, the ejection sliding plate drives a plurality of ejection blocks at the top to upwards drive the edge of the ceiling lamp shell to upwards separate along the mold, so that on one hand, the device and a finished lamp shell are assisted to be demolded, and on the other hand, the fragile connecting column is protected; and the connecting column is prevented from being broken in the connecting hole in the mold base in the demolding process.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic injection molding equipment, and particularly to an injection mold for an automobile front dome light housing and an injection molding method thereof. Background Art

[0002] Currently, most of the automobile front dome light housings are transparent components for controlling or adjusting light. Due to their structure being an irregular arc structure, and there are several support columns, connecting columns, etc. on the inner wall of the arc structure, this poses special requirements for the production molds.

[0003] The injection molds for automobile front dome light housings in the prior art can basically meet people's usage requirements. However, several small components such as support columns and connecting columns arranged on the inner wall of the existing automobile dome light housing are not easily separated from the mold during injection molding and demolding. Due to the low strength of the small components, the small components break inside the mold during the demolding of the lamp housing. Summary of the Invention

[0004] The purpose of the present invention is to provide an injection mold for an automobile front dome light housing and an injection molding method thereof to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is an injection mold for an automobile front dome light housing and an injection molding method thereof, including a workbench surface. The bottom of the workbench surface is fixedly connected with several support bases. The top of the workbench surface is fixedly connected with several sliding columns. One end of the sliding column away from the workbench surface is slidably connected with a lifting platform. The side wall of the workbench surface is provided with cooling holes, and the side wall of the workbench surface is provided with injection holes. It further includes:

[0007] An injection mold mechanism, which includes electric push rods fixedly connected to both sides of the workbench surface. One end of the electric push rod away from the workbench surface is fixedly connected with a driving rod. One end of the driving rod away from the electric push rod is fixedly connected with the top of the lifting platform. A positioning groove is opened above the workbench surface. The bottom of the positioning groove is fixedly connected with a mold base. Several connecting holes are arranged inside the mold base. Several connecting springs are fixedly connected to the inner wall of the lifting platform. One end of the connecting spring away from the inner wall of the lifting platform is fixedly connected with a mold top cover. The mold top cover is slidably connected to the bottom of the lifting platform.

[0008] Furthermore, a sealing and pressing mechanism is arranged inside the lifting platform. The sealing and pressing mechanism includes several extrusion columns slidably connected to the bottom of the lifting platform. The top of the extrusion column is fixedly connected with an extrusion spring. A sliding groove is opened inside the lifting platform. Several sliders are slidably connected inside the sliding groove.

[0009] Further, the sealing and pressing mechanism further includes a first connecting rod rotatably connected to the top of the extrusion column. One end of the first connecting rod away from the extrusion column is rotatably connected to the slider. A sliding rod is fixedly connected to the top of the sliding groove, and a second connecting rod is rotatably connected to the bottom of the slider.

[0010] Further, the sealing and pressing mechanism further includes a driving plate slidably connected to the sliding rod. One end of the second connecting rod away from the slider is rotatably connected to the driving plate. A pressing telescopic rod is fixedly connected to the bottom of the end of the driving plate away from the sliding rod. One end of the pressing telescopic rod away from the driving plate is fixedly connected to an extrusion plate. An extrusion airbag ring is fixedly connected to the bottom of the extrusion plate. The bottom of the extrusion airbag ring is pressed against the top of the mold top cover.

[0011] Further, an extrusion mechanism is provided at the bottom of the lifting platform. The extrusion mechanism includes a plurality of downward pressing rods fixedly connected to the bottom of the lifting platform. A plurality of downward pressing grooves are formed in the top of the workbench surface. The downward pressing rods are slidably connected inside the downward pressing grooves. One end of the downward pressing rod away from the lifting platform is rotatably connected to an extrusion roller.

[0012] Further, the extrusion mechanism further includes a plurality of limiting columns fixedly connected inside the workbench surface. A fixed bottom plate is fixedly connected to the bottom of the limiting columns. A tension spring is sleeved on the limiting columns. A sliding top plate is slidably connected to the top of the limiting columns. The top of the tension spring is fixedly connected to the bottom of the sliding top plate.

[0013] Further, the extrusion mechanism further includes a first extrusion inclined plate rotatably connected to both ends of the sliding top plate. A second extrusion inclined plate is rotatably connected to both ends of the limiting column. One end of the second extrusion inclined plate away from the fixed bottom plate is rotatably connected to one end of the first extrusion inclined plate away from the sliding top plate.

[0014] Further, a jacking mechanism is provided at the bottom of the mold base. The jacking mechanism includes a plurality of limiting rods fixedly connected inside the workbench surface. A blanking sliding plate is slidably connected to one end of the limiting rod close to the top of the sliding top plate. The bottom of the blanking sliding plate is fixedly connected to the top of the sliding top plate. A plurality of ejector pins are fixedly connected to the top of the blanking sliding plate. The ejector pins are slidably connected inside the connection holes. Top blocks are fixedly connected to both ends of the top of the blanking sliding plate.

[0015] An injection molding method for an injection mold of an automotive front headlight housing includes the following steps:

[0016] Step 1: Seal the injection mold;

[0017] Step 2: Clean the injection mold;

[0018] Step 3: Eject the housing.

[0019] The present invention has the following beneficial effects:

[0020] (1) In the present invention, by providing a jacking mechanism, after the injection molding is completed, the coolant injected through the cooling holes cools the automotive ceiling lamp housing inside the mold sufficiently. At this time, by starting the electric push rod, it drives the lifting platform to slide upward along the sliding column. At this time, the lifting platform drives several pressing rods at the bottom to slide upward along the pressing grooves. The pressing rods drive the extrusion rollers to slide upward along the pressing grooves. When the extrusion rollers are pressed against the second extrusion inclined plate, the second extrusion inclined plate drives one end of the first extrusion inclined plate to slide upward along the limit column. The first extrusion inclined plate drives several ejector sliding plates on the sliding top plate to move upward. At this time, the ejector sliding plates drive several ejector pins to eject the connecting columns inside the connecting holes upward along the connecting holes. At the same time, the ejector sliding plates drive several top blocks at the top to drive the edge of the ceiling lamp housing to move upward along the mold to separate. Such a setting is beneficial in assisting the demolding of the device from the finished lamp housing on the one hand, and protecting the relatively fragile connecting columns on the other hand, preventing the connecting columns from breaking inside the connecting holes on the mold base during the demolding process.

[0021] (2) In the present invention, by providing an extrusion mechanism, when the electric push rod drives the lifting platform to slide downward along the sliding column, the lifting platform drives several pressing rods at the bottom to slide downward along the pressing grooves. The downward sliding of the pressing grooves drives the extrusion rollers at the bottom of the pressing rods to slide downward along the pressing grooves. First, the extrusion rollers are pressed against the first extrusion inclined plate. When the first extrusion inclined plate is pressed, it drives the sliding top plate rotatably connected to one end of the first extrusion inclined plate to stretch the tension spring upward along the limit column. The upward sliding of the sliding top plate drives the ejector sliding plate to slide upward along the limit rod. The upward sliding of the ejector sliding plate drives several ejector pins at the top to slide upward along the connecting holes. When the extrusion rollers are disengaged from contact with the first extrusion inclined plate, under the pulling force of the tension spring, the sliding top plate pulls the ejector pins on the ejector sliding plate to slide downward along the connecting holes. Such a setting is beneficial in removing foreign matters adhering to the inner wall of the connecting holes by the ejector pins on the one hand. At this time, in cooperation with a hair dryer in the prior art, the dust and other foreign matters ejected by the ejector pins are blown away from the mold base. On the other hand, the tension spring drives the ejector sliding plate at the top of the sliding top plate to reset, which is beneficial in ensuring the reset of the ejector pins inside the connecting holes, thereby ensuring the integrity of the mold.

[0022] (3) In the present invention, when using this device, first connect the external cooling water pipe to the cooling holes, and then connect the injection molding pipe to the injection molding holes. At this time, start the electric push rod. The electric push rod drives the lifting platform to slide downward along the sliding column. The lifting platform drives the mold top cover at the bottom of the internal connecting spring to slide downward. The mold top cover at the bottom of the lifting platform moves towards the end close to the alignment groove. At this time, the bottom of the lifting platform comes into contact with the alignment groove. The mold base inside the alignment groove and the mold top cover form a complete mold. When the edge of the mold top cover is pressed against the top of the mold base, the injection molding raw material is injected between the mold base and the mold top cover through the injection molding holes. Such a setting is beneficial in completing the injection molding process of the automotive ceiling lamp by this device.

[0023] (4) In the present invention, by providing a sealing and pressing mechanism, when the electric push rod drives the lifting table to move downward, the lifting table drives a plurality of extrusion columns at the bottom to move downward. When the extrusion columns are in contact with the top of the workbench surface, the extrusion columns are squeezed by the top of the workbench surface and squeeze the extrusion springs upward along the workbench surface. At this time, the extrusion columns drive the sliders at one end of the connecting rod one to slide along the sliding groove towards the end close to the sliding rod, and the sliders drive the driving plates at one end of the connecting rod two to slide downward along the sliding rod. The driving plates drive the extrusion plates at one end of the pressing telescopic rod to squeeze the extrusion airbag ring downward. The extrusion airbag ring deforms under the extrusion, which is beneficial to squeezing the top of the mold top cover by the extrusion airbag ring, so that the sealing effect between the mold top cover and the mold base is better, and the injection molding raw material is prevented from overflowing through the gap between the mold base and the mold top cover.

[0024] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a schematic cross-sectional structure diagram of the lifting table of the present invention;

[0028] Figure 3 is of the present invention Figure 2 is an enlarged view of A in;

[0029] Figure 4 is a schematic cross-sectional structure diagram of the whole of the present invention;

[0030] Figure 5 is a schematic partial cross-sectional structure diagram of the present invention;

[0031] Figure 6 is of the present invention Figure 5 is an enlarged view of B in;

[0032] Figure 7 is of the present invention Figure 5 is an enlarged view of C in;

[0033] Figure 8 is a flowchart of the usage method of the present invention.

[0034] In the drawings, the list of components represented by each reference numeral is as follows:

[0035] In the figure: 1, workbench surface; 11, support base; 12, sliding column; 13, lifting table; 14, cooling hole; 15, injection hole; 2, injection mold mechanism; 201, electric push rod; 202, driving rod; 203, alignment groove; 204, mold base; 205, connection hole; 206, connection spring; 207, mold top cover; 3, sealing and pressing mechanism; 301, extrusion column; 302, extrusion spring; 303, sliding groove; 304, slider; 305, connecting rod 1; 306, sliding rod; 307, connecting rod 2; 308, driving plate; 309, pressing telescopic rod; 310, extrusion plate; 311, extrusion airbag ring; 4, extrusion mechanism; 401, downward pressure rod; 402, downward pressure groove; 403, extrusion roller; 404, limit column; 405, fixed bottom plate; 406, tension spring; 407, sliding top plate; 408, extrusion inclined plate 1; 409, extrusion inclined plate 2; 5, jacking mechanism; 501, limit rod; 502, ejector sliding plate; 503, ejector pin; 504, ejector block. Specific implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Example 1, please refer to Figures 1-4 As shown, the present invention is an injection mold for an automotive front ceiling lamp housing and its injection method, including a workbench surface 1. A plurality of support bases 11 are fixedly connected to the bottom of the workbench surface 1. A plurality of sliding columns 12 are fixedly connected directly above the workbench surface 1. One end of the sliding column 12 away from the workbench surface 1 is slidably connected to a lifting table 13. Cooling holes 14 are opened on the side wall of the workbench surface 1 for water mist. Injection holes 15 are opened on the side wall of the workbench surface 1. It also includes:

[0038] The injection mold mechanism 2, the injection mold mechanism 2 includes electric push rods 201 fixedly connected to both sides of the workbench surface 1. One end of the electric push rod 201 away from the workbench surface 1 is fixedly connected with a driving rod 202. One end of the driving rod 202 away from the electric push rod 201 is fixedly connected to the top of the lifting table 13. A positioning groove 203 is opened directly above the workbench surface 1. The bottom of the positioning groove 203 is fixedly connected with a mold base 204. A number of connecting holes 205 are arranged inside the mold base 204. A number of connecting springs 206 are fixedly connected to the inner wall of the lifting table 13. One end of the connecting spring 206 away from the inner wall of the lifting table 13 is fixedly connected with a mold top cover 207. The mold top cover 207 is slidably connected to the bottom of the lifting table 13. The function of this component is that when using this device, first connect the external cooling water pipe to the cooling hole 14, and then connect the injection pipe to the injection hole 15. At this time, start the electric push rod 201. The electric push rod 201 drives the lifting table 13 to slide down along the sliding column 12. The lifting table 13 drives the mold top cover 207 at the bottom of the internal connecting spring 206 to slide down. The mold top cover 207 at the bottom of the lifting table 13 moves towards the end close to the positioning groove 203. At this time, the bottom of the lifting table 13 contacts the positioning groove 203. The mold base 204 inside the positioning groove 203 and the mold top cover 207 form a complete mold. When the edge of the mold top cover 207 is squeezed against the top of the mold base 204, the injection raw material is injected between the mold base 204 and the mold top cover 207 through the injection hole 15. Such a setting is beneficial for this device to complete the injection process of the car roof lamp.

[0039] A sealing and pressing mechanism 3 is arranged inside the lifting table 13. The sealing and pressing mechanism 3 includes a number of extrusion columns 301 slidably connected to the bottom of the lifting table 13. The top of the extrusion column 301 is fixedly connected with an extrusion spring 302. A sliding groove 303 is opened inside the lifting table 13. A number of sliders 304 are slidably connected inside the sliding groove 303.

[0040] The sealing and pressing mechanism 3 further includes a first connecting rod 305 rotatably connected to the top of the extrusion column 301. One end of the first connecting rod 305 away from the extrusion column 301 is rotatably connected to the slider 304. A sliding rod 306 is fixedly connected to the top of the sliding groove 303. A second connecting rod 307 is rotatably connected to the bottom of the slider 304.

[0041] The sealing and pressing mechanism 3 further includes a driving plate 308 slidably connected to the sliding rod 306. One end of the second connecting rod 307 away from the slider 304 is rotatably connected to the driving plate 308. The bottom of the end of the driving plate 308 away from the sliding rod 306 is fixedly connected with a pressing telescopic rod 309. One end of the pressing telescopic rod 309 away from the driving plate 308 is fixedly connected with a pressing plate 310. The bottom of the pressing plate 310 is fixedly connected with a pressing airbag ring 311. The bottom of the pressing airbag ring 311 is pressed against the top of the mold top cover 207. The function of this component is to set the sealing and pressing mechanism 3. When the electric push rod 201 drives the lifting table 13 to move downward, the lifting table 13 drives several pressing columns 301 at the bottom to move downward. When the pressing columns 301 are pressed against the top of the workbench surface 1, the pressing columns 301 are pressed by the top of the workbench surface 1 and press the compression spring 302 upward along the workbench surface 1. At this time, the pressing columns 301 drive the slider 304 at one end of the first connecting rod 305 to slide along the sliding groove 303 towards the end close to the sliding rod 306. The slider 304 drives the driving plate 308 at one end of the second connecting rod 307 to slide downward along the sliding rod 306. The driving plate 308 drives the pressing plate 310 at one end of the pressing telescopic rod 309 to press the pressing airbag ring 311 downward along the sliding rod 306. The pressing airbag ring 311 is deformed under the extrusion. Such a setting is beneficial to the pressing airbag ring 311 to press the top of the mold top cover 207, so that the sealing effect between the mold top cover 207 and the mold base 204 is better, and the injection molding raw material is prevented from overflowing through the gap between the mold base 204 and the mold top cover 207.

[0042] Embodiment 2, the difference from Embodiment 1 is that; as Figures 1-8 shown, an extrusion mechanism 4 is provided at the bottom of the lifting table 13. The extrusion mechanism 4 includes a plurality of downward pressing rods 401 fixedly connected to the bottom of the lifting table 13. A plurality of downward pressing grooves 402 are formed in the top of the workbench surface 1. The downward pressing rods 401 are slidably connected inside the downward pressing grooves 402. One end of the downward pressing rod 401 away from the lifting table 13 is rotatably connected to an extrusion roller 403.

[0043] The extrusion mechanism 4 further includes a plurality of limiting columns 404 fixedly connected inside the workbench surface 1. The bottom of the limiting columns 404 is fixedly connected with a fixed bottom plate 405. A tension spring 406 is sleeved on the limiting columns 404. The top of the limiting columns 404 is slidably connected with a sliding top plate 407. The top of the tension spring 406 is fixedly connected with the bottom of the sliding top plate 407.

[0044] The extrusion mechanism 4 further includes extrusion inclined plates 408 rotatably connected to both ends of the sliding top plate 407. Both ends of the limiting column 404 are rotatably connected with extrusion inclined plates 409. The end of the extrusion inclined plate 409 away from the fixed bottom plate 405 is rotatably connected with the end of the extrusion inclined plate 408 away from the sliding top plate 407. The function of this component is that by setting the extrusion mechanism 4, when the electric push rod 201 drives the lifting table 13 to slide downward along the sliding column 12, the lifting table 13 drives several downward pressing rods 401 at the bottom to slide downward along the downward pressing grooves 402. The downward sliding of the downward pressing grooves 402 drives the extrusion rollers 403 at the bottom of the downward pressing rods 401 to slide downward along the downward pressing grooves 402. First, the extrusion roller 403 is pressed against the extrusion inclined plate 408. When the extrusion inclined plate 408 is pressed, it will drive the sliding top plate 407 rotatably connected to one end of the extrusion inclined plate 408 to stretch the tension spring 406 upward along the limiting column 404.

[0045] A jacking mechanism 5 is provided at the bottom of the mold base 204. The jacking mechanism 5 includes several limiting rods 501 fixedly connected inside the workbench surface 1. One end of the limiting rod 501 close to the top of the sliding top plate 407 is slidably connected with a blanking sliding plate 502. The bottom of the blanking sliding plate 502 is fixedly connected with the top of the sliding top plate 407. Several ejector posts 503 are fixedly connected to the top of the blanking sliding plate 502. The ejector posts 503 are slidably connected inside the connection holes 205. Two ends of the top of the blanking sliding plate 502 are fixedly connected with top blocks 504. The function of this component is that by setting the jacking mechanism 5, after injection molding is completed, the coolant injected through the cooling holes 14 cools the automotive headlight housing inside the mold sufficiently. At this time, by starting the electric push rod 201 to drive the lifting table 13 to slide upward along the sliding column 12, the lifting table 13 drives several downward pressing rods 401 at the bottom to slide upward along the downward pressing grooves 402. The downward pressing rods 401 drive the extrusion rollers 403 to slide upward along the downward pressing grooves 402. When the extrusion roller 403 is pressed against the extrusion inclined plate 409, the extrusion inclined plate 409 drives one end of the extrusion inclined plate 408 to slide upward along the limiting column 404. The extrusion inclined plate 408 drives several blanking sliding plates 502 on the sliding top plate 407 to move upward. At this time, the blanking sliding plate 502 drives several ejector posts 503 to eject the connecting posts inside the connection holes 205 upward along the connection holes 205. At the same time, the blanking sliding plate 502 drives several top blocks 504 at the top to drive the edge of the headlight housing to move upward along the mold to separate. Such a setting is beneficial in assisting the demolding of the device from the finished lamp shell on the one hand, and protecting the relatively fragile connecting posts on the other hand, to prevent the connecting posts from breaking inside the connection holes 205 on the mold base 204 during the demolding process.

[0046] An injection molding method for an injection mold of an automotive front headlight housing includes the following steps:

[0047] Step 1: Seal the injection mold;

[0048] Step 2: Clean the injection mold;

[0049] Step 3: Eject the housing.

[0050] A specific application of this embodiment is as follows:

[0051] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An injection mold for an outer shell of a front ceiling lamp of an automobile, comprising a work surface (1), a plurality of support bases (11) are fixedly connected to the bottom of the work surface (1), a plurality of sliding columns (12) are fixedly connected directly above the work surface (1), a lifting platform (13) is slidably connected to one end of the sliding column (12) away from the work surface (1), a cooling hole (14) is provided on a water mist side wall of the work surface (1), and an injection hole (15) is provided on a side wall of the work surface (1), wherein: Also includes: An injection mold mechanism (2), the injection mold mechanism (2) comprising an electric push rod (201) fixedly connected to both sides of a work surface (1), one end of the electric push rod (201) away from the work surface (1) is fixedly connected to a driving rod (202), one end of the driving rod (202) away from the electric push rod (201) is fixedly connected to the top of a lifting platform (13), a positioning groove (203) is provided directly above the work surface (1), the bottom of the positioning groove (203) is fixedly connected to a mold base (204), a plurality of connecting holes (205) are provided inside the mold base (204), a plurality of connecting springs (206) are fixedly connected to the inner wall of the lifting platform (13), one end of the connecting spring (206) away from the inner wall of the lifting platform (13) is fixedly connected to a mold top cover (207), and the mold top cover (207) is slidably connected to the bottom of the lifting platform (13).

2. The injection mold for the outer shell of a front roof lamp of an automobile according to claim 1, characterized in that: A sealing clamping mechanism (3) is arranged inside the lifting platform (13), and the sealing clamping mechanism (3) comprises a plurality of squeezing columns (301) slidably connected to the bottom of the lifting platform (13), and a squeezing spring (302) is fixedly connected to the top of the squeezing column (301). A sliding groove (303) is provided inside the lifting platform (13), and a plurality of sliding blocks (304) are slidably connected inside the sliding groove (303).

3. The injection mold for the outer shell of a front roof lamp of an automobile according to claim 2, characterized in that: The sealing clamping mechanism (3) also includes a connecting rod 1 (305) rotatably connected to the top of the extrusion column (301), and the end of the connecting rod 1 (305) away from the extrusion column (301) is rotatably connected to the slider (304), the top of the sliding groove (303) is fixedly connected to a sliding rod (306), and the bottom of the slider (304) is rotatably connected to a connecting rod 2 (307).

4. The injection mold for the outer shell of the automotive front ceiling lamp according to claim 3, characterized in that: The sealing clamping mechanism (3) also includes a driving plate (308) slidably connected to the sliding rod (306), and the end of the connecting rod 2 (307) away from the sliding block (304) is rotatably connected to the driving plate (308), and the bottom of the end of the driving plate (308) away from the sliding rod (306) is fixedly connected with a clamping telescopic rod (309), and the end of the clamping telescopic rod (309) away from the driving plate (308) is fixedly connected with an extrusion plate (310), and the bottom of the extrusion plate (310) is fixedly connected with an extrusion airbag ring (311), and the bottom of the extrusion airbag ring (311) is extruded with the top of the mold top cover (207).

5. The injection mold for the outer shell of the automotive front ceiling lamp according to claim 4, characterized in that: The bottom of the lifting platform (13) is provided with an extrusion mechanism (4), and the extrusion mechanism (4) includes a plurality of downward pressing rods (401) fixedly connected to the bottom of the lifting platform (13); the top of the working table (1) is provided with a plurality of downward pressing grooves (402); the downward pressing rods (401) are slidably connected inside the downward pressing grooves (402); and one end of the downward pressing rod (401) away from the lifting platform (13) is rotatably connected to an extrusion roller (403).

6. The injection mold for the outer shell of the automotive front ceiling lamp according to claim 5, characterized in that: The extrusion mechanism (4) also includes a plurality of limit columns (404) fixedly connected to the inside of the work surface (1), the bottom of the limit columns (404) being fixedly connected to a fixed bottom plate (405), a tension spring (406) being sleeved on the limit columns (404), the top of the limit columns (404) being slidably connected to a sliding top plate (407), and the top of the tension spring (406) being fixedly connected to the bottom of the sliding top plate (407).

7. The injection mold for the outer shell of the automotive front ceiling lamp according to claim 6, characterized in that: The extrusion mechanism (4) further comprises an extrusion inclined plate 1 (408) rotatably connected to both ends of the sliding top plate (407); both ends of the limiting column (404) are rotatably connected to an extrusion inclined plate 2 (409); an end of the extrusion inclined plate 2 (409) away from the fixed bottom plate (405) is rotatably connected to an end of the extrusion inclined plate 1 (408) away from the sliding top plate (407).

8. The injection mold for the outer shell of a front roof lamp of an automobile according to claim 7, characterized in that: A lifting mechanism (5) is provided at the bottom of the mold base (204), and the lifting mechanism (5) includes a plurality of limit rods (501) fixedly connected to the inside of the work surface (1), and one end of the limit rod (501) close to the top of the sliding top plate (407) is slidably connected to a material lifting sliding plate (502), and the bottom of the material lifting sliding plate (502) is fixedly connected to the top of the sliding top plate (407), and the top of the material lifting sliding plate (502) is fixedly connected to a plurality of lifting columns (503), and the lifting columns (503) are slidably connected to the inside of the connecting hole (205), and the top two ends of the top of the material lifting sliding plate (502) are fixedly connected to lifting blocks (504).

9. An injection molding method for an injection mold of an automobile front dome light housing, using the injection mold of an automobile front dome light housing as claimed in claim 8, characterized in that: It includes the following steps: Step 1: Sealing the injection mold; Step 2: Clean the injection mold; Step 3: Remove the outer shell.

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