Injection mold of automobile bumper

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold of an automobile bumper, which comprises a first module, a second module arranged on one side of the first module, four guide columns fixedly connected onto the first module, and four guide sleeves fixedly connected onto the second module. The guide columns are inserted into the adjacent guide sleeves and are in sliding connection with the guide sleeves, first protective covers are arranged on the outer sides of the guide columns, second protective covers are in sliding connection with the outer sides of the first protective covers, third protective covers are in sliding connection with the outer sides of the second protective covers, and baffle rings are detachably mounted at one ends of the third protective covers; the outer side of the third protective cover is sleeved with a spring. After the guide column is separated from the guide sleeve, the outside of the guide column can be shielded and protected, so that dirt such as cooling liquid can be prevented from being splashed to the surface of the guide column, cleanliness of the surface of the guide column is guaranteed, the matching precision is guaranteed, and meanwhile the service life of the guide column and the service life of the guide sleeve are guaranteed.

Description

Technical Field

[0001] This utility model relates to an injection mold, specifically an injection mold for an automobile bumper, and belongs to the field of injection mold technology. Background Technology

[0002] As a key safety and appearance component of a car body, the molding precision and surface quality of the car bumper directly affect the vehicle's assembly performance, collision safety, and visual appeal. Injection molds are the core equipment for mass production of car bumpers, and the guiding precision during mold closing is a crucial factor in ensuring the dimensional stability of the bumper. The precise fit between the guide pillars and guide sleeves ensures accurate alignment between the moving and fixed molds, avoiding defects such as flash and material shortages caused by cavity misalignment, while also reducing collision wear on mold components.

[0003] However, the guide pillars are completely exposed to the workshop environment when the mold is open, and there are often issues such as coolant splashing and lubricating oil dripping in automotive bumper production workshops. These contaminants adhering to the guide pillars can cause multiple problems: First, contaminants are squeezed into the mating gaps when the mold is closed, causing scratches and wear on the guide pillars and guide sleeves, resulting in decreased mating accuracy. This, in turn, can cause dimensional deviations in the bumper, such as hole misalignment and edge warping, leading to an increased defect rate. Second, the corrosive medium formed by the mixture of oil and water can accelerate the peeling of the chrome plating on the surface of the guide pillars and the corrosion of the inner wall of the guide sleeves, significantly shortening the service life of the guide components. Utility Model Content

[0004] The purpose of this utility model is to provide an injection mold for an automobile bumper to solve the above problems. When the guide post and the guide sleeve are separated, the outside of the guide post can be shielded and protected, thereby preventing coolant and other dirt from splashing onto the surface of the guide post, ensuring the cleanliness of the guide post surface, thus ensuring the fitting accuracy, and at the same time ensuring the service life of the guide post and the guide sleeve.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an injection mold for an automobile bumper, comprising a first module, a second module provided on one side of the first module, four guide posts fixedly connected to the first module, and four guide sleeves fixedly connected to the second module, the guide posts being inserted into the interior of adjacent guide sleeves and slidably connected to the guide sleeves, a protective structure installed on the first module, the protective structure comprising a first protective cover and a second protective cover, the first protective cover being provided on the outer side of the guide posts, the first protective cover being provided with a fixing structure, the second protective cover being slidably connected to the outer side of the first protective cover, the second protective cover being slidably connected to the outer side of the second protective cover, a retaining ring being detachably installed at one end of the third protective cover, a spring being sleeved on the outer side of the third protective cover, one end of the spring abutting against the retaining ring, and the other end of the spring abutting against the first protective cover.

[0006] Preferably, the center of the first protective cover and the center of the guide post located inside it are on the same straight line, and the center of the retaining ring and the third protective cover are on the same straight line.

[0007] Preferably, one side of the retaining ring is provided with multiple positioning protrusions, and the inner side of the third protective cover is fixedly connected with multiple connecting seats corresponding one-to-one with the positioning protrusions. The positioning protrusions are engaged with the adjacent connecting seats, and bolts are threaded through the interior of the positioning protrusions. The bolts are threadedly connected to the adjacent connecting seats.

[0008] Preferably, the cross-section of one end of the positioning protrusion is trapezoidal, and the four positioning protrusions are arranged in a circumferential array about the middle of the retaining ring.

[0009] Preferably, the fixing structure includes a connecting block and a connecting shaft. Two connecting blocks are fixedly connected to the first protective cover. A connecting shaft is provided through the connecting block. The connecting shaft is fixedly connected to the first module. A nut is threaded onto the connecting shaft. The nut abuts against the connecting block.

[0010] Preferably, one side of the nut is integrally formed with a positioning protrusion, and the connecting block is provided with a groove, and the positioning protrusion and the groove are engaged.

[0011] Preferably, the two connecting blocks are arranged in a circumferential array about the middle of the first protective cover, and the cross-section of one end of the positioning protrusion is trapezoidal.

[0012] Preferably, the first module is provided with multiple mounting holes, and the second module is also provided with multiple mounting holes, with adjacent mounting holes being linearly and equidistantly distributed.

[0013] The beneficial effects of this utility model are as follows: During the mold opening process, the first module will drive the four guide pillars to move away from the second module. Simultaneously, the spring will extend, driving the retaining ring to move. The retaining ring will cause the third protective cover to slide outside the second protective cover. After the third protective cover moves a certain distance, it will again drive the second protective cover to slide outside the first protective cover. When the guide pillars disengage from the inside of the guide sleeve, the second protective cover will abut against the first protective cover under the action of the spring. At the same time, the ends of the guide pillars are located inside the third protective cover. Therefore, after mold opening, the first, second, and third protective covers can pass through. The protective cover shields the outside of the guide post, preventing coolant and other contaminants from splashing onto its surface, thus ensuring cleanliness and precision. This also extends the lifespan of the guide post and guide sleeve. Since the retaining ring is detachable, the spring can be replaced when its elasticity decreases due to repeated extensions and retractions. The first protective cover can be removed from the first module, and the second and third protective covers can be removed along with it, exposing the guide post. Exposing the guide post facilitates lubrication and cleaning, making maintenance easier. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0016] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of section B.

[0017] Figure 4 This is a schematic diagram of the connection structure between the retaining ring and the positioning protrusion of this utility model;

[0018] Figure 5 This is a schematic diagram of the connection structure between the connecting block and the groove of this utility model;

[0019] Figure 6 This is a schematic diagram of the connection structure between the first module and the second module of this utility model.

[0020] In the diagram: 1. First module; 2. Second module; 3. Guide post; 4. Guide sleeve; 5. Protective structure; 501. First protective cover; 502. Second protective cover; 503. Third protective cover; 504. Retaining ring; 505. Spring; 506. Positioning protrusion; 507. Bolt; 508. Connecting seat; 6. Fixing structure; 601. Connecting block; 602. Connecting shaft; 603. Nut; 604. Positioning protrusion; 605. Groove; 7. Mounting hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-6 As shown, an injection mold for a car bumper includes a first module 1, a second module 2 on one side of the first module 1, four guide posts 3 fixedly connected to the first module 1, and four guide sleeves 4 fixedly connected to the second module 2. The guide posts 3 are inserted into the interior of adjacent guide sleeves 4 and are slidably connected to the guide sleeves 4. A protective structure 5 is installed on the first module 1, the protective structure 5 including a first protective cover 501 and a second protective cover 502. The first protective cover 501 is located on the outer side of the guide posts 3, and the center of the first protective cover 501 and the guide posts located on its inner side are connected. The centers of the three are on the same straight line. The first protective cover 501 is provided with a fixed structure 6. The outer side of the first protective cover 501 is slidably connected to the second protective cover 502. The outer side of the second protective cover 502 is slidably connected to the third protective cover 503. A retaining ring 504 is detachably installed at one end of the third protective cover 503. The centers of the retaining ring 504 and the third protective cover 503 are on the same straight line. A spring 505 is sleeved on the outer side of the third protective cover 503. One end of the spring 505 abuts against the retaining ring 504, and the other end of the spring 505 abuts against the first protective cover 501.

[0023] As a technical optimization of this utility model, a plurality of positioning protrusions 506 are provided on one side of the retaining ring 504. The positioning protrusions 506 can be used to position the retaining ring 504 during installation, so that the subsequent bolts 507 can be smoothly inserted into the interior of the connecting seat 508. A plurality of connecting seats 508 corresponding one-to-one with the positioning protrusions 506 are fixedly connected to the inner side of the third protective cover 503. The positioning protrusions 506 engage with the adjacent connecting seats 508. The bolts 507 are threaded through the interior of the positioning protrusions 506. The retaining ring 504 can be fixed by the threaded connection between the bolts 507 and the connecting seats 508.

[0024] As a technical optimization of this utility model, the cross-section of one end of the positioning protrusion 506 is trapezoidal, so it can play a role in motion guidance when the positioning protrusion 506 and the connecting seat 508 are engaged. The four positioning protrusions 506 are arranged in a circumferential array about the middle of the retaining ring 504.

[0025] As a technical optimization of this utility model, the fixing structure 6 includes a connecting block 601 and a connecting shaft 602. Two connecting blocks 601 are fixedly connected to the first protective cover 501. The connecting block 601 is provided with a connecting shaft 602 through it. The connecting shaft 602 is fixedly connected to the first module 1. A nut 603 is threadedly connected to the connecting shaft 602. The nut 603 abuts against the connecting block 601, so that the first protective cover 501 can be fixed on the first module 1.

[0026] As a technical optimization of this utility model, a positioning protrusion 604 is integrally formed on one side of the nut 603, and a groove 605 is provided on the connecting block 601. The positioning protrusion 604 and the groove 605 are engaged, so the precise positioning between the first protective cover 501 and the first module 1 can be achieved by the engagement between the positioning protrusion 604 and the groove 605.

[0027] As a technical optimization of this utility model, the two connecting blocks 601 are arranged in a circumferential array about the middle of the first protective cover 501, and the cross-section of one end of the positioning protrusion 604 is trapezoidal, so it can play a guiding role when the positioning protrusion 604 and the groove 605 are engaged.

[0028] As a technical optimization of this utility model, the first module 1 is provided with a plurality of mounting holes 7, so the first module 1 can be installed and fixed through the mounting holes 7. The second module 2 is also provided with a plurality of mounting holes 7, so the second module 2 can be installed and fixed through the mounting holes 7. The plurality of adjacent mounting holes 7 are linearly and equidistantly distributed.

[0029] In use, during the mold opening process, the first module 1 drives the four guide posts 3 to move away from the second module 2. Simultaneously, the spring 505 extends, causing the retaining ring 504 to move. The retaining ring 504 causes the third protective cover 503 to slide outside the second protective cover 502. After the third protective cover 503 moves a certain distance, it again causes the second protective cover 502 to slide outside the first protective cover 501. When the guide posts 3 disengage from the inside of the guide sleeve 4, the second protective cover 502, under the action of the spring 505, will abut against the first protective cover 501. At the same time, the guide posts 3... The end is located inside the third protective cover 503. Therefore, after mold opening, the outer side of the guide post 3 can be shielded and protected by the first protective cover 501, the second protective cover 502, and the third protective cover 503, thereby preventing coolant and other dirt from splashing onto the surface of the guide post 3, ensuring the cleanliness of the guide post 3 surface, thus ensuring the fitting accuracy, and also ensuring the service life of the guide post 3 and the guide sleeve 4. When the spring 505 loses elasticity due to excessive extension and contraction, multiple bolts 507 can be unscrewed from the connecting seat 508 using an Allen wrench, and then the retaining ring 504 can be removed from one end of the third protective cover 503. Remove the old spring 505 from the third protective cover 503 and place the new spring 505 on the outside of the third protective cover 503. After the new spring 505 is on, move the retaining ring 504 to one end of the third protective cover 503 and engage the positioning protrusion 506 with the connecting seat 508 to position the retaining ring 504. Finally, insert the multiple bolts 507 into the connecting seat 508 to lock it in place, thus replacing the spring 505. When it is necessary to clean or lubricate the surface of the guide post 3, the nut 603 can be turned with a wrench. The movable positioning protrusion 604 will disengage from the inside of the groove 605. After both positioning protrusions 604 disengage from the inside of the groove 605, the first protective cover 501 can be rotated. During the rotation of the first protective cover 501, the two connecting blocks 601 will disengage from the two connecting shafts 602 at the same time. Then the first protective cover 501 can be removed from the outside of the guide post 3. The second protective cover 502 and the third protective cover 503 will be removed together with the first protective cover 501, thereby exposing the guide post 3. After the guide post 3 is exposed, it is convenient to lubricate and clean its surface, thus facilitating the inspection and maintenance of the guide post 3.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An injection mould for a motor vehicle bumper comprising a first mould block (1), characterised in that: A second module (2) is provided on one side of the first module (1). Four guide posts (3) are fixedly connected to the first module (1), and four guide sleeves (4) are fixedly connected to the second module (2). The guide posts (3) are inserted into the interior of the adjacent guide sleeves (4) and are slidably connected to the guide sleeves (4). A protective structure (5) is installed on the first module (1). The protective structure (5) includes a first protective cover (501) and a second protective cover (502). The first protective cover (501) is provided on the outside of the guide posts (3). The first protective cover (501) is provided with a fixing structure (6). The outer side of the first protective cover (501) is slidably connected to the second protective cover (502). The outer side of the second protective cover (502) is slidably connected to the third protective cover (503). One end of the third protective cover (503) is detachably installed with a retaining ring (504). The outer side of the third protective cover (503) is fitted with a spring (505). One end of the spring (505) abuts against the retaining ring (504), and the other end of the spring (505) abuts against the first protective cover (501).

2. An injection mold for an automobile bumper according to claim 1, wherein: The center of the first protective cover (501) and the center of the guide post (3) located inside it are on the same straight line, and the centers of the retaining ring (504) and the third protective cover (503) are on the same straight line.

3. The injection mold for an automobile bumper of claim 1, wherein: The retaining ring (504) has multiple positioning protrusions (506) on one side. The inner side of the third protective cover (503) is fixedly connected with multiple connecting seats (508) that correspond one-to-one with the positioning protrusions (506). The positioning protrusions (506) are engaged with the adjacent connecting seats (508). The positioning protrusions (506) are provided with bolts (507) through the interior of the positioning protrusions (506). The bolts (507) are threadedly connected to the adjacent connecting seats (508).

4. The injection mold for an automobile bumper of claim 3, wherein: The cross-section of one end of the positioning protrusion (506) is trapezoidal, and the four positioning protrusions (506) are arranged in a circular array about the middle of the retaining ring (504).

5. The injection mold for an automobile bumper of claim 1, wherein: The fixing structure (6) includes a connecting block (601) and a connecting shaft (602). Two connecting blocks (601) are fixedly connected to the first protective cover (501). A connecting shaft (602) is provided through the connecting block (601). The connecting shaft (602) is fixedly connected to the first module (1). A nut (603) is threadedly connected to the connecting shaft (602). The nut (603) abuts against the connecting block (601).

6. An injection mold for an automobile bumper according to claim 5, wherein: The nut (603) has a positioning protrusion (604) integrally formed on one side, and the connecting block (601) has a groove (605) thereon, and the positioning protrusion (604) and the groove (605) engage with each other.

7. An injection mold for an automotive bumper according to claim 6, wherein: The two connecting blocks (601) are arranged in a circular array about the middle of the first protective cover (501), and the cross-section of one end of the positioning protrusion (604) is trapezoidal.

8. The injection mold for an automotive bumper of claim 1, wherein: The first module (1) is provided with a plurality of mounting holes (7), and the second module (2) is also provided with a plurality of mounting holes (7), and a plurality of the mounting holes (7) are linearly and equidistantly distributed between adjacent mounting holes (7).

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