An injection mold for an automobile lamp

Abstract

The application relates to an automobile lamp injection mold, which comprises a first mold base and a second mold base, the first mold base and the second mold base are distributed left and right, a mold cavity is arranged on the right side of the first mold base, an injection hole is arranged on the left side of the first mold base, the injection hole is communicated with the mold cavity, a module is fixedly arranged on the left side of the second mold base, a first heat dissipation mechanism is arranged on the first mold base, and a second heat dissipation mechanism is arranged on the second mold base; the first heat dissipation mechanism comprises a heat dissipation assembly, the heat dissipation assembly comprises an assembly hole and a moving pipe, the assembly hole is a blind hole, and the assembly hole is located on the right side wall of the first mold base; heat on the first mold base and the second mold base is absorbed by cooling water to realize heat dissipation; the flow of the cooling water in the water cooling channel reduces the heat transfer distance on the second mold base and improves the heat dissipation effect of the second mold base.

Description

Technical Field

[0001] This invention relates to an injection mold for automotive headlights, belonging to the field of molds. Background Technology

[0002] Vehicle lights refer to the lights on a vehicle, which are used to illuminate the road at night and to signal various driving conditions. The installation of vehicle lights requires light assemblies, which are manufactured using a combination of molds and injection molding processes.

[0003] Utility model patent application number CN202022143290.9 discloses a car lamp mold with an external cooling circulation pipe, including a fixed mold base and a movable mold base. The fixed mold base is installed on the parallel right side of the movable mold base. The fixed mold base has guide rail holes near its four corners, and the movable mold base has guide rail posts on its right outer wall near its four corners. By adding a novel position correction device to the inner walls of the two mold bases on opposite sides of the external cooling circulation pipe, the novel position correction device can correct the position when the movable mold base moves to the right and docks with the fixed mold base. This allows the movable mold base to dock accurately with the fixed mold base. After the movable mold base and the fixed mold base are docked, the position correction device can also reinforce the joint, preventing the docked movable mold base and the fixed mold base from sinking. However, in the prior art, when the mold is cooled, the heat from the molten material is transferred to the cooling water in the cooling circulation pipe through the mold base. The heat transfer takes a long time, which affects the heat dissipation efficiency.

[0004] Therefore, there is a need for an automotive headlight injection mold that can achieve efficient heat dissipation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an automotive headlight injection mold that achieves efficient heat dissipation in order to overcome the shortcomings of the prior art.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows: an injection mold for automotive headlights, including a first mold base and a second mold base, the first mold base and the second mold base are distributed on the left and right sides, a mold cavity is provided on the right side of the first mold base, an injection hole is provided on the left side of the first mold base, the injection hole communicates with the mold cavity, a module is fixedly provided on the left side of the second mold base, a first heat dissipation mechanism is provided on the first mold base, and a second heat dissipation mechanism is provided on the second mold base;

[0007] The first heat dissipation mechanism includes a heat dissipation component, which includes an assembly hole and a moving tube. The assembly hole is a blind hole located on the right side wall of the first mold base. The assembly hole consists of a sliding section and a receiving section distributed on the left and right sides. The diameter of the sliding section is smaller than the diameter of the receiving section. The moving tube passes through the receiving section, with one end inserted into the sliding section and the other end sealed. The moving tube slides and is sealed to the inner wall of the sliding section. The moving tube is elastically connected to the first mold base. A through hole is provided on the moving tube, which communicates with the inner cavity of the moving tube. An air outlet is provided on the left side wall of the first mold base. A connecting groove is provided on the right side wall of the first mold base, with both ends of the connecting groove extending to the air outlet and the receiving section, respectively. An air inlet is provided on the first mold base. The air inlet is a blind hole and communicates with the sliding section.

[0008] During mold separation, the air inlet, sliding section, moving tube cavity, and through hole form the first air passage;

[0009] When the mold is closed, the air inlet, sliding section, moving tube cavity, through hole, receiving section, connecting groove and air outlet form a second air passage;

[0010] The second heat dissipation mechanism includes a second water inlet main pipe, a baffle, and multiple second water inlet pipes. The second mold base is provided with water holes, and the two ends of the water holes extend to the left and right sides of the second mold base, respectively. A water cooling cavity is provided on the right side wall of the module, and the water cooling cavity communicates with the water holes. The baffle is located on the right side of the second mold base, and the baffle seals the water holes. The second water inlet main pipe is fixedly passed through the baffle, and one end of the second water inlet main pipe is located in the water cooling cavity. A gap is provided between the second water inlet main pipe and the inner wall of the water holes. Multiple second water inlet pipes are all fixedly passed through the baffle, and one end of the second water inlet pipe is located in the water holes.

[0011] The second water inlet main pipe cavity, the water cooling cavity, the water hole, and the second water inlet branch cavity form a water cooling channel.

[0012] Preferably, a spring is provided inside the sliding section, with the spring and the moving tube distributed on the left and right sides. One end of the spring is fixedly connected to the moving tube, and the other end of the spring is fixedly connected to the inner sidewall of the sliding section.

[0013] Preferably, the air inlet is located at the bottom of the first mold base, and the assembly hole and the air outlet are both located above the mold cavity.

[0014] Preferably, multiple heat dissipation components are provided, and the multiple heat dissipation components are evenly distributed from front to back.

[0015] Preferably, the first heat dissipation mechanism further includes a first water inlet pipe, a first water outlet pipe, and a first cooling pipe. The first cooling pipe is annular and is fixedly sleeved on the outer peripheral wall of the first mold base. Both the first water inlet pipe and the first water outlet pipe are connected to the first cooling pipe.

[0016] Preferably, there are multiple first cooling pipes, which are evenly distributed from left to right. Adjacent first cooling pipes are connected by multiple first connecting pipes, and the first water inlet pipe and the first water outlet pipe are respectively connected to two of the first cooling pipes.

[0017] Preferably, the first water inlet pipe is connected to the leftmost first cooling pipe, and the first water outlet pipe is connected to the rightmost first cooling pipe.

[0018] Preferably, the second heat dissipation mechanism further includes a second water outlet pipe and a second cooling pipe. The second cooling pipe is annular and is fixedly sleeved on the outer peripheral wall of the second mold base. Multiple second water inlets are connected to the second cooling pipe, and the second water outlet pipe is connected to the second cooling pipe.

[0019] Preferably, multiple second cooling pipes are provided, which are evenly distributed from left to right. Multiple second water inlet pipes are all connected to the rightmost second cooling pipe, and the second water outlet pipe is connected to the leftmost second cooling pipe.

[0020] Preferably, an injection fitting is installed at the outer end of the injection hole.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] 1. Heat dissipation is achieved by absorbing heat from the first and second mold bases using cooling water;

[0023] 2. The flow of cooling water in the water-cooling channel is the flow of cooling water inside the second mold base, which reduces the heat transfer distance on the second mold base and improves the heat dissipation effect of the second mold base;

[0024] 3. By the flow of air in the first and second air channels, the first mold base is cooled by air, which increases the heat dissipation of the first mold. The flow of air on the inner wall of the first mold base reduces the heat transfer distance on the first mold base and improves the heat dissipation efficiency of the first mold base. Furthermore, during mold parting, the air discharged from the through hole acts on the module, and under the action of airflow, it blows away impurities on the surface of the module. This not only avoids impurities from affecting the injection molding effect, but also achieves air cooling of the second mold base.

[0025] 4. The switching of air between the first and second air passages is achieved by moving the second mold base, which improves the degree of automation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the mold closing state of an automotive headlight injection mold according to the present invention;

[0027] Figure 2 This is a schematic diagram of the mold parting state of an automotive headlight injection mold according to the present invention;

[0028] Figure 3 for Figure 2 The main view;

[0029] Figure 4 for Figure 2 The left view;

[0030] Figure 5 for Figure 2 The right view;

[0031] Figure 6 for Figure 2 Top view;

[0032] Figure 7 A schematic diagram of the first heat dissipation mechanism in its modular state;

[0033] Figure 8 for Figure 7 A sectional view;

[0034] Figure 9 This is a schematic diagram of the first heat dissipation mechanism in the mold-closed state.

[0035] Figure 10 for Figure 9 A sectional view;

[0036] Figure 11 This is a sectional view of the first mold base;

[0037] Figure 12 This is a schematic diagram of the second heat dissipation mechanism;

[0038] Figure 13 for Figure 12 A sectional view.

[0039] in:

[0040] First mold base 1, second mold base 2, mold cavity 3, injection hole 4, module 5, first heat dissipation mechanism 6, second heat dissipation mechanism 7, injection joint 8;

[0041] Heat dissipation component 61, first water inlet pipe 62, first water outlet pipe 63, first cooling pipe 64, first connecting pipe 65;

[0042] Assembly hole 61.1, moving tube 61.2, spring 61.3, through hole 61.4, air outlet 61.5, connecting groove 61.6, air inlet 61.7;

[0043] Sliding section 61.11, storage section 61.12;

[0044] Second water inlet main pipe 71, baffle 72, second water inlet branch pipe 73, water hole 74, water cooling cavity 75, second water outlet pipe 76, second cooling pipe 77, second connecting pipe 78. Detailed Implementation

[0045] like Figure 1-13 As shown, an automotive headlight injection mold in this embodiment includes a first mold base 1 and a second mold base 2, which are distributed left and right. A mold cavity 3 is provided on the side of the first mold base 1 near the second mold base 2, and an injection hole 4 is provided on the other side of the first mold base 1. The injection hole 4 communicates with the mold cavity 3, and an injection connector 8 is installed at the outer end of the injection hole 4. A module 5 is fixedly provided on the side of the second mold base 2 near the first mold base 1. A first heat dissipation mechanism 6 is provided on the first mold base 1, and a second heat dissipation mechanism 7 is provided on the second mold base 2.

[0046] During operation, the first mold base 1 and the second mold base 2 are respectively connected to the fixed frame of the injection molding machine and the push system of the injection molding machine, and the injection joint 8 is connected to the injection port of the injection molding machine. When the push system pushes the second mold base 2 to move closer to the first mold base 1 and the first mold base 1 and the second mold base 2 close the mold, the module 5 is inserted into the mold cavity 3. Then, the injection port of the injection molding machine discharges the hot melt material and conveys it into the mold cavity 3 in sequence from the injection joint 8 and the injection hole 4. The first heat dissipation mechanism 6 dissipates heat from the first mold base 1, and the second heat dissipation mechanism 7 dissipates heat from the second mold base 2. After the material cools and is formed, the push system drives the second mold base 2 to move in the opposite direction and the first mold base 1 and the second mold base 2 separate the molds. The finished product that has been injection molded can then be taken out.

[0047] The first heat dissipation mechanism 6 includes a plurality of heat dissipation components 61, which are evenly distributed from front to back;

[0048] The heat dissipation assembly 61 includes an assembly hole 61.1 and a moving tube 61.2. The assembly hole 61.1 is a blind hole located on the right side wall of the first mold base 1. The assembly hole 61.1 consists of a sliding section 61.11 and a receiving section 61.12 distributed left and right. The diameter of the sliding section 61.11 is smaller than the diameter of the receiving section 61.12. The moving tube 61.2 passes through the receiving section 61.12. One end of the moving tube 61.2 is inserted into the sliding section 61.11, and the other end of the moving tube 61.2 is sealed. The moving tube 61.2 slides and is sealed to the inner wall of the sliding section 61.11. A spring 61.3 is provided inside the sliding section 61.11. The spring 61.3 is connected to the moving tube. The first mold base 1 has a sliding section 61.11 with its left and right sides distributed as follows: one end of the spring 61.3 is fixedly connected to the moving tube 61.2, and the other end of the spring 61.3 is fixedly connected to the inner wall of the sliding section 61.11. The moving tube 61.2 has a through hole 61.4 communicating with the inner cavity of the moving tube 61.2. The left side wall of the first mold base 1 has an air outlet 61.5, and the right side wall of the first mold base 1 has a connecting groove 61.6, with both ends extending to the air outlet 61.5 and the receiving section 61.12 respectively. The first mold base 1 has an air inlet 61.7, which is a blind hole and communicates with the sliding section 61.11. 61.7 is located at the bottom of the first mold base 1. The assembly hole 61.1 and the vent hole 61.5 are both located above the mold cavity 3. During mold parting, the vent hole 61.7, the sliding section 61.11, the cavity of the moving tube 61.2, and the through hole 61.4 form the first air passage. During mold closing, the vent hole 61.7, the sliding section 61.11, the cavity of the moving tube 61.2, the through hole 61.4, the receiving section 61.12, the connecting groove 61.6, and the vent hole 61.5 form the second air passage. During mold closing, the moving tube 61.2 is squeezed by the second module 5, causing the end of the moving tube 61.2 away from the spring 61.3 to be pushed into the receiving section 61.12, and the spring 61.3 to be compressed. According to calculation, at this time, the through hole 61.4 is located in the receiving section 61.12. 12. The air inlet 61.7 is connected to an air supply device, which can be an air pump. The air supply device delivers air to the second air passage and then discharges it from the air outlet. During mold separation, the first mold base 1 and the second mold base 2 are separated. The elastic action of the spring 61.3 causes the moving tube 61.2 to move in the opposite direction to achieve reset. According to calculation, the through hole 61.4 is located on the right side of the first module base. The air supply device delivers air to the first air passage and then discharges it from the through hole 61.4 and acts on the module 5. Under the action of the airflow, impurities on the surface of the module 5 are blown away, thereby avoiding impurities from affecting the injection molding effect. In addition, it can also achieve air cooling of the second mold base 2. Furthermore, the flow of air in the first and second air passages achieves heat dissipation of the first mold base 1.

[0049] The first heat dissipation mechanism 6 further includes a first water inlet pipe 62, a first water outlet pipe 63, and a first cooling pipe 64. Multiple first cooling pipes 64 are provided and are evenly distributed from left to right. The first cooling pipes 64 are annular and are fixedly sleeved on the outer peripheral wall of the first mold base 1. The first water inlet pipe 62 and the first water outlet pipe 63 are respectively connected to two of the first cooling pipes 64. Adjacent first cooling pipes 64 are connected by multiple first connecting pipes 65.

[0050] The first water inlet pipe 62 is connected to the leftmost first cooling pipe 64, and the first water outlet pipe 63 is connected to the rightmost first cooling pipe 64.

[0051] The first water inlet pipe 62 is connected to a water supply device, which can be a water pump. The water supply device delivers cooling water from the first water inlet pipe 62 to the leftmost first cooling pipe 64, and then through the first connecting pipe 65 to the other first cooling pipes 64 in sequence. The cooling water in the rightmost first cooling pipe 64 is discharged from the first water outlet pipe 63. The heat on the first mold base 1 is transferred to the cooling water through the first cooling pipe 64, thereby achieving heat dissipation of the first mold base 1.

[0052] The second heat dissipation mechanism 7 includes a second water inlet main pipe 71, a baffle 72, and multiple second water inlet branches 73. The second mold base 2 is provided with water holes 74, with both ends of the water holes 74 extending to the left and right sides of the second mold base 2, respectively. A water-cooling cavity 75 is provided on the right side wall of the module 5, and the water-cooling cavity 75 communicates with the water holes 74. The baffle 72 is located on the right side of the second mold base 2 and seals over the water holes 74. The second water inlet main pipe 71 is fixedly passed through the baffle 72, with one end of the second water inlet main pipe 71 located inside the water-cooling cavity 75. A gap is provided between the water hole 74 and the inner wall. Multiple second water inlet pipes 73 are fixedly passed through the baffle 72. One end of the second water inlet pipe 73 is located inside the water hole 74. The cavity of the second water inlet main pipe 71, the water cooling cavity 75, the water hole 74 and the cavity of the second water inlet pipe 73 form a water cooling channel. The second water inlet main pipe 71 is connected to a water supply device, which can be a water pump. The water supply device delivers cooling water from the second water inlet main pipe 71 to the water cooling cavity 75 and then from the water hole 74 to the second water inlet pipe 73 and discharges it. The cooling water absorbs the heat on the second mold base 2 and the module 5 to achieve heat dissipation.

[0053] The second heat dissipation mechanism 7 also includes a second water outlet pipe 76 and a second cooling pipe 77. Multiple second cooling pipes 77 are provided and are evenly distributed from left to right. The second cooling pipes 77 are annular and are fixedly sleeved on the outer peripheral wall of the second mold base 2. Multiple second water inlet pipes 73 are connected to the rightmost second cooling pipe 77. The second water outlet pipe 76 is connected to the leftmost second cooling pipe 77. Adjacent second cooling pipes 77 are connected by multiple second connecting pipes 78. The cooling water discharged from the second water inlet pipe 73 is transported to the rightmost second cooling pipe 77 and then flows to the other first cooling pipes 64 through the second connecting pipes 78. The cooling water in the leftmost second cooling pipe 77 is discharged from the second water outlet pipe 76. The heat on the second mold base 2 is transferred to the cooling water through the second cooling pipes 77, thereby achieving heat dissipation of the second mold base 2.

[0054] In summary, heat dissipation is achieved by absorbing heat from the first mold base 1 and the second mold base 2 using cooling water;

[0055] Moreover, the flow of cooling water in the water-cooling channel is the flow of cooling water inside the second mold base 2, which reduces the heat transfer distance on the second mold base 2 and improves the heat dissipation effect of the second mold base 2.

[0056] In addition, the airflow in the first and second air passages enables the first mold base 1 to be air-cooled, which increases the heat dissipation of the first mold. The airflow in the inner wall of the first mold base 1 reduces the heat transfer distance on the first mold base 1 and improves the heat dissipation efficiency of the first mold base 1. Furthermore, during mold parting, the air discharged from the through hole 61.4 acts on the module 5. Under the action of the airflow, impurities on the surface of the module 5 are blown away. This not only avoids impurities from affecting the injection molding effect, but also enables the air cooling of the second mold base 2.

[0057] Secondly, the switching of air between the first and second air passages is achieved by the movement of the second mold base 2, which improves the degree of automation;

[0058] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. An injection mold for automotive headlights, comprising a first mold base (1) and a second mold base (2), the first mold base (1) and the second mold base (2) being distributed left and right, a mold cavity (3) being provided on the right side of the first mold base (1), an injection hole (4) being provided on the left side of the first mold base (1), the injection hole (4) communicating with the mold cavity (3), and a module (5) being fixedly provided on the left side of the second mold base (2), characterized in that: The first mold base (1) is provided with a first heat dissipation mechanism (6), and the second mold base (2) is provided with a second heat dissipation mechanism (7). The first heat dissipation mechanism (6) includes a heat dissipation component (61), which includes an assembly hole (61.1) and a moving tube (61.2). The assembly hole (61.1) is a blind hole located on the right side wall of the first mold base (1). The assembly hole (61.1) consists of a sliding section (61.11) and a receiving section (61.12) distributed on the left and right sides. The diameter of the sliding section (61.11) is smaller than the diameter of the receiving section (61.12). The moving tube (61.2) passes through the receiving section (61.12). One end of the moving tube (61.2) is inserted into the sliding section (61.11), and the other end of the moving tube (61.2) is sealed. The moving tube (61.2) and the sliding section... The inner wall of (61.11) is slidably and sealed. The moving tube (61.2) is elastically connected to the first mold base (1). The moving tube (61.2) is provided with a through hole (61.4). The through hole (61.4) communicates with the inner cavity of the moving tube (61.2). The left side wall of the first mold base (1) is provided with an air outlet (61.5). The right side wall of the first mold base (1) is provided with a connecting groove (61.6). The two ends of the connecting groove (61.6) extend to the air outlet (61.5) and the receiving section (61.12) respectively. The first mold base (1) is provided with an air inlet (61.7). The air inlet (61.7) is a blind hole. The air inlet (61.7) communicates with the sliding section (61.11). During mold separation, the air inlet (61.7), sliding section (61.11), moving tube (61.2) cavity and through hole (61.4) form the first air passage; When the mold is closed, the air inlet (61.7), sliding section (61.11), moving tube (61.2) cavity, through hole (61.4), receiving section (61.12), connecting groove (61.6) and air outlet (61.5) form a second air passage; The second heat dissipation mechanism (7) includes a second water inlet main pipe (71), a baffle (72) and a plurality of second water inlet pipes (73). A water hole (74) is provided on the second mold base (2). The two ends of the water hole (74) extend to the left and right sides of the second mold base (2) respectively. A water cooling cavity (75) is provided on the right side wall of the module (5). The water cooling cavity (75) is connected to the water hole (74). The baffle (72) is located on the right side of the second mold base (2). The baffle (72) is sealed on the water hole (74). The second water inlet main pipe (71) is fixedly passed through the baffle (72). One end of the second water inlet main pipe (71) is located in the water cooling cavity (75). A gap is provided between the second water inlet main pipe (71) and the inner wall of the water hole (74). A plurality of second water inlet pipes (73) are fixedly passed through the baffle (72). One end of the second water inlet pipe (73) is located in the water hole (74). The cavity of the second water inlet main pipe (71), the water cooling cavity (75), the water hole (74) and the cavity of the second water inlet branch pipe (73) form a water cooling channel.

2. The automotive headlight injection mold according to claim 1, characterized in that: A spring (61.3) is provided inside the sliding section (61.11). The spring (61.3) and the moving tube (61.2) are distributed on the left and right. One end of the spring (61.3) is fixedly connected to the moving tube (61.2), and the other end of the spring (61.3) is fixedly connected to the inner wall of the sliding section (61.11).

3. The automotive headlight injection mold according to claim 1, characterized in that: The air inlet (61.7) is located at the bottom of the first mold base (1), and the assembly hole (61.1) and the air outlet (61.5) are both located above the mold cavity (3).

4. The automotive headlight injection mold according to claim 1, characterized in that: Multiple heat dissipation components (61) are provided, and the multiple heat dissipation components (61) are evenly distributed from front to back.

5. An automotive headlight injection mold according to any one of claims 1-4, characterized in that: The first heat dissipation mechanism (6) also includes a first water inlet pipe (62), a first water outlet pipe (63) and a first cooling pipe (64). The first cooling pipe (64) is annular and is fixedly sleeved on the outer peripheral wall of the first mold base (1). The first water inlet pipe (62) and the first water outlet pipe (63) are both connected to the first cooling pipe (64).

6. The automotive headlight injection mold according to claim 5, characterized in that: The first cooling pipe (64) is provided in multiple ways. The multiple first cooling pipes (64) are evenly distributed from left to right. Adjacent first cooling pipes (64) are connected by multiple first connecting pipes (65). The first water inlet pipe (62) and the first water outlet pipe (63) are respectively connected to two of the first cooling pipes (64).

7. The automotive headlight injection mold according to claim 6, characterized in that: The first water inlet pipe (62) is connected to the leftmost first cooling pipe (64), and the first water outlet pipe (63) is connected to the rightmost first cooling pipe (64).

8. The automotive headlight injection mold according to claim 1, characterized in that: The second heat dissipation mechanism (7) also includes a second water outlet pipe (76) and a second cooling pipe (77). The second cooling pipe (77) is annular and is fixedly sleeved on the outer peripheral wall of the second mold base (2). Multiple second water inlets are connected to the second cooling pipe (77), and the second water outlet pipe (76) is connected to the second cooling pipe (77).

9. The automotive headlight injection mold according to claim 8, characterized in that: The second cooling pipe (77) is provided in multiple ways. The multiple second cooling pipes (77) are evenly distributed from left to right. The multiple second water inlet pipes (73) are all connected to the rightmost second cooling pipe (77). The second water outlet pipe (76) is connected to the leftmost second cooling pipe (77).

10. The automotive headlight injection mold according to claim 1, characterized in that: An injection connector (8) is installed at the outer end of the injection hole (4).

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