An automobile lamp housing forming mold

Abstract

The present invention belongs to the technical field of injection molds, and specifically relates to an injection mold for forming an automobile lamp housing, which includes a moving mold assembly and a fixed mold assembly; the moving mold assembly includes a core, a moving template, a moving mold bottom plate, an ejector rod panel, an ejector rod bottom plate, a spacer block, a slider, a guide pillar, and a first ejector rod; the fixed mold assembly includes a fixed mold bottom plate, a fixed template, a cavity, and a sprue bushing; the core and the cavity are correspondingly arranged as two cavities in one mold, and a runner is arranged at the top of the core between the two mold cavities; movable slots are respectively arranged at both ends of the runner inside the core; the raw material is injected into the mold by an injection molding machine. The raw material first enters the interior of the mold through the sprue bushing, and then flows into the gap formed between the core and the cavity through the runner. As the raw material flows, the first ejector rod ejects the automobile lamp housing from the core, realizing that after the production of the automobile lamp housing is completed, there is no need to trim the automobile lamp housing any more.

Description

Technical Field

[0001] The present invention belongs to the technical field of injection molds, and specifically relates to an injection mold for forming an automotive lamp housing. Background Art

[0002] In the production of plastic products, injection molds are basically used for production because the manufacturing cost of injection molds is much lower and the design process is short, enabling large-scale manufacturing in a short period. Each step of injection mold manufacturing is designed and disassembled separately, and multiple types of molds need to be selected according to customer requirements in the early stage, making injection molds deeply loved by customers.

[0003] Automotive lamp housings are plastic products. In order to reduce production costs and improve production efficiency, injection molds are selected to produce automotive lamp housings. When using an injection mold for production, the raw material enters the mold interior through a sprue bushing and a runner by an injection machine. After the raw material solidifies, the automotive lamp housing is formed. However, when the raw material solidifies into the automotive lamp housing, the raw material in the runner is also connected to the automotive lamp housing and solidifies simultaneously.

[0004] Therefore, after the automotive lamp housing is produced in the injection mold, subsequent trimming and processing are required, which increases the production steps of the automotive lamp housing and reduces the production efficiency of the automotive lamp housing. To solve the problem that further trimming and processing are required after the production of the automotive lamp housing, the present invention provides an injection mold for forming an automotive lamp housing. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: An injection mold for forming an automotive lamp housing according to the present invention includes a moving mold assembly and a fixed mold assembly; the moving mold assembly includes a core; the fixed mold assembly includes a cavity.

[0007] The core and the cavity are correspondingly arranged as two cavities in one mold. A runner is provided at the top of the core between the two mold cavities; movable grooves are provided at both ends of the runner inside the core; a cutting knife is slidably connected in the movable groove; a second ejector rod is fixedly connected to the bottom of the cutting knife; the second ejector rod is slidably connected to an ejector plate, a movable template, and the core, and the second ejector rod penetrates through the ejector plate, the movable template, and the core; the end of the second ejector rod away from the cutting knife is clamped at the bottom of the ejector plate.

[0008] Preferably, a plurality of first ejector rods are clamped at the bottom of the ejector rod panel; the plurality of first ejector rods are slidably connected inside the ejector rod panel, the moving template and the core, and the first ejector rods penetrate through the ejector rod panel, the moving template and the core; the plurality of first ejector rods are symmetrically distributed at the bottom of the core; return rods are fixedly connected to the four corners of the top surface of the ejector rod panel; a first spring is sleeved outside the return rods; a bottom plate of the ejector rod is fixedly connected to the bottom of the ejector rod panel; the end of the return rod away from the ejector rod panel is slidably connected inside the moving template.

[0009] Preferably, two cushion blocks are fixedly connected to both sides of the bottom surface of the moving template; a bottom plate of the moving mold is fixedly connected to the bottom of the cushion block; four guide posts are fixedly connected to the top surface of the bottom plate of the moving mold; guide sleeves are fixedly connected to the ejector rod panel and the bottom plate of the ejector rod corresponding to the guide posts; the guide posts are slidably connected inside the guide sleeves; both the ejector rod panel and the bottom plate of the ejector rod are slidably connected between the two cushion blocks; a push hole is formed at the center of the bottom plate of the moving mold.

[0010] Preferably, two support columns are fixedly connected to the top surface of the bottom plate of the moving mold; the support columns are slidably connected to the ejector rod panel and the bottom plate of the ejector rod, and the support columns penetrate through the ejector rod panel and the bottom plate of the ejector rod; four limit posts are fixedly connected to the top surface of the ejector rod panel.

[0011] Preferably, four trash nails are fixedly connected to the top surface of the bottom plate of the moving mold; the top surface of the trash nails contacts the bottom surface of the bottom plate of the ejector rod; the trash nails are made of steel, and the top ends of the trash nails are parallel to the bottom surface of the bottom plate of the ejector rod.

[0012] Preferably, a fixed template is fixedly connected to the top surface of the cavity; a first runner is fixedly connected inside both the core and the cavity; the output end and the input end of the first runner in the cavity penetrate through the fixed template, and the output end and the input end of the first runner in the core penetrate through the moving template.

[0013] Preferably, a bottom plate of the moving mold is fixedly connected to the top surface of the moving template; an installation hole is formed at the center of the bottom plate of the moving mold; a positioning ring is fixedly connected to the top surface of the bottom plate of the moving mold corresponding to the installation hole; a sprue bushing is installed on the moving template corresponding to the positioning ring; the sprue bushing penetrates through the moving template and the cavity.

[0014] Preferably, two positioning pins are symmetrically fixedly connected to the bottom surface of the sprue bushing; sliding grooves are symmetrically formed on the side walls of the two positioning pins; annular clamping grooves are formed on the side walls of the two positioning pins; positioning grooves are formed on the moving template corresponding to the positioning pins; protrusions are arranged on the side walls of the positioning grooves corresponding to the sliding grooves; the protrusions are slidably connected to the sliding grooves; two annular clamping blocks are slidably connected to the positioning grooves corresponding to the annular clamping grooves; the two annular clamping blocks are clamped in the annular clamping grooves; two connecting rods are fixedly connected to the side walls of the annular clamping blocks away from the positioning pins; a second spring is fixedly connected to the end of the connecting rod away from the annular clamping block.

[0015] Preferably, two sets of inserts are snap - connected inside the core; on both sides of the top surface of the moving template, first grooves are respectively opened; a slider is slidably connected inside the first groove; one end of the slider close to the core contacts the side wall of the core; an inclined hole is penetrated inside the slider; a slanting rod is fixedly connected to the fixed template corresponding to the inclined hole.

[0016] Preferably, a wedge - tightening block is fixedly connected to the side wall of the slider away from the core; a protrusion is arranged on the top of the wedge - tightening block; a first hole is opened on the top surface of the protrusion; a second groove is opened on the bottom surface of the moving template corresponding to the protrusion; a limiting screw rod is fixedly connected to the top surface inside the second groove corresponding to the first hole.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the automotive lamp housing forming mold of the present invention, raw materials are injected into the mold through an injection molding machine. The raw materials first enter the interior of the mold through the sprue bushing, and then flow into the gap formed between the core and the cavity through the runner. As the raw materials flow, the gap formed between the core and the cavity will be filled with the raw materials. Subsequently, the raw materials are cooled inside the mold. Since the raw materials will shrink during cooling, the injection molding machine needs to apply pressure to the mold to ensure that no defects will occur due to shrinkage during the solidification process of the raw materials. After the pressure - holding is completed, the automotive lamp housing needs to be taken out. When taking it out, the ejector rod of the injection molding machine first pushes the ejector plate, and the ejector plate drives the second ejector rod and the cutter to move upward by a certain distance, so that the cutter cuts the automotive lamp housing from the solidified waste in the runner. Subsequently, the mold is opened, and the ejector rod of the injection molding machine continues to push the ejector plate, and the ejector plate drives the first ejector rod to move upward, and the first ejector rod then ejects the automotive lamp housing from the core, realizing that after the production of the automotive lamp housing is completed, there is no need to trim the automotive lamp housing anymore.

[0019] 2. For the automotive lamp housing forming mold of the present invention, by directly pressing the sprue bushing into the fixed template, the positioning pins on the sprue bushing will be inserted into the positioning grooves, and the protrusions in the positioning grooves are stuck with the sliding grooves, so that the sprue bushing will not shake under the action of the positioning grooves and the protrusions, making the positional relationship between the bottom end of the sprue bushing and the runner more precise. When the bottom end of the positioning pin touches the two annular clamping blocks, the annular clamping blocks will be pushed open, enabling the positioning pin to pass through the annular clamping blocks. Subsequently, the annular clamping blocks will, under the action of the second spring, clamp the positioning pin, fixing the positioning pin. When replacing the sprue bushing, only a little more force is needed to take the sprue bushing off the fixed template. Since the injection molding machine applies a force to the sprue bushing when injecting raw materials into the mold through the sprue bushing, the sprue bushing will be fixed more stably on the fixed template, realizing the rapid installation and disassembly of the sprue bushing on the fixed template and improving the use efficiency of the mold. Description of the Drawings

[0020] The present invention will be further described below with reference to the drawings.

[0021] Figure 1 is the perspective view of the present invention;

[0022] Figure 2 is the exploded view of the present invention;

[0023] Figure 3 is the perspective view of the ejector rod panel, the first ejector rod, the second ejector rod and the cutting knife of the present invention;

[0024] Figure 4 is the perspective view of the core of the present invention;

[0025] Figure 5 is the perspective view of the moving template and the core of the present invention;

[0026] Figure 6 is the perspective view of the moving mold bottom plate, the spacer block and the support column of the present invention;

[0027] Figure 7 is the perspective view of the sprue bushing, the locating pin and the annular clamping block of the present invention;

[0028] Figure 8 is the front view cross-sectional view of the present invention;

[0029] Figure 9 is the right view cross-sectional view of the present invention;

[0030] Figure 10 is the right view cross-sectional view of the second embodiment of the present invention.

[0031] In the figure: 1, fixed mold bottom plate; 11, locating ring; 2, fixed template; 21, sprue bushing; 22, locating pin; 23, annular clamping block; 24, connecting rod; 25, second spring; 26, cavity; 3, moving template; 31, core; 32, insert block; 33, slider; 34, guide pillar; 35, inclined rod; 36, runner; 4, spacer block; 5, moving mold bottom plate; 51, waste nail; 52, support column; 53, push hole; 6, ejector rod bottom plate; 7, ejector rod panel; 71, first ejector rod; 72, second ejector rod; 73, cutting knife; 74, limit post; 75, return rod; 76, first spring; 8, first runner; 9, wedge block; 91, limit screw. Specific Embodiments

[0032] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0033] Embodiment 1

[0034] As Figures 1 to 3As shown in the figure, a molding die for an automobile lamp housing according to an embodiment of the present invention includes a moving die assembly and a fixed die assembly; the moving die assembly includes a core 31, a moving template 3, a moving die bottom plate 5, a ejector rod panel 7, an ejector rod bottom plate 6, a spacer block 4, a slider 33, a guide pillar 34, and a first ejector rod 71; the fixed die assembly includes a fixed die bottom plate 1, a fixed template 2, a cavity 26, and a sprue bushing 21.

[0035] The core 31 and the cavity 26 are correspondingly arranged as two cavities in one mold. A runner 36 is provided at the top of the core 31 between the two mold cavities; movable grooves are provided at both ends of the runner 36 inside the core 31; a cutting knife 73 is slidably connected in the movable groove; the bottom of the cutting knife 73 is fixedly connected to a second ejector rod 72; one end of the second ejector rod 72 away from the cutting knife 73 is clamped to the bottom of the ejector rod panel 7; the second ejector rod 72 is slidably connected to the ejector rod panel 7, the moving template 3, and the core 31, and the second ejector rod 72 penetrates through the ejector rod panel 7, the moving template 3, and the core 31.

[0036] During operation, since the automobile lamp housing is produced by an injection mold, after being produced by the injection mold, solidified raw materials will remain on the surface of the automobile lamp housing corresponding to the runner 36, and manual trimming of the automobile lamp housing is required to achieve the effect of removing waste materials. However, this increases the production steps and reduces the production efficiency. The raw materials are injected into the mold through an injection molding machine. The raw materials first enter the mold interior through the sprue bushing 21, and then the raw materials flow into the gap formed between the core 31 and the cavity 26 through the runner 36. As the raw materials flow, the gap formed between the core 31 and the cavity 26 will be filled with the raw materials. Subsequently, the raw materials are cooled in the mold. Since the raw materials will shrink during cooling, the injection molding machine needs to maintain pressure on the mold to ensure that no defects will occur due to shrinkage during the solidification process of the raw materials. After the pressure holding is completed, the automobile lamp housing needs to be taken out. When taking out, the ejector rod of the injection molding machine first pushes the ejector rod bottom plate 6, and the ejector rod bottom plate 6 drives the second ejector rod 72 and the cutting knife 73 to move upward for a certain distance, so that the cutting knife 73 cuts the solidified waste in the automobile lamp housing and the runner 36. Subsequently, the mold is opened, and the ejector rod of the injection molding machine continues to push the ejector rod bottom plate 6, and the ejector rod bottom plate 6 drives the first ejector rod upward. The first ejector rod 71 then ejects the automobile lamp housing from the core 31, realizing that the automobile lamp housing does not need to be trimmed after production.

[0037] As Figures 1 to 3As shown in the figure, multiple groups of first ejector rods 71 are snap-connected to the bottom of the ejector rod panel 7; multiple groups of the first ejector rods 71 are slidably connected inside the ejector rod panel 7, the moving template 3, and the core 31, and the first ejector rods 71 penetrate through the ejector rod panel 7, the moving template 3, and the core 31; multiple groups of the first ejector rods 71 are symmetrically distributed at the bottom of the core 31; return rods 75 are fixedly connected to the four corners of the top surface of the ejector rod panel 7; a first spring 76 is sleeved outside the return rod 75; the bottom of the ejector rod panel 7 is fixedly connected to an ejector rod bottom plate 6 by screws; one end of the return rod 75 away from the ejector rod panel 7 is slidably connected inside the moving template 3.

[0038] During operation, the ejector rod of the injection machine first pushes the ejector rod bottom plate 6, so that the cutting knife 73 cuts the solidified waste in the automotive lamp housing and the runner 36, and then the mold is opened. The ejector rod of the injection machine continues to push the ejector rod bottom plate 6, and the ejector rod bottom plate 6 drives the first ejector rods 71 to move upward. The first ejector rods 71 then eject the automotive lamp housing from the core 31. After the automotive lamp housing is taken out, the mold needs to be closed. When the mold is closed, a force is required to reset the first ejector rods 71, the second ejector rods 72, the ejector rod panel 7, and the ejector rod bottom plate 6 so that the production of the automotive lamp housing can continue. When the mold is opened and the automotive lamp housing is taken out, the first spring 76 is compressed. When the mold is closed, the first spring 76 will push the ejector rod panel 7 to move, and drive the first ejector rods 71, the second ejector rods 72, and the ejector rod bottom plate 6 to move accordingly. Under the action of the first spring 76, the first ejector rods 71, the second ejector rods 72, the ejector rod panel 7, and the ejector rod bottom plate 6 are reset, realizing that after the first ejector rods 71, the second ejector rods 72, the ejector rod panel 7, and the ejector rod bottom plate 6 eject the automotive lamp housing, the first ejector rods 71, the second ejector rods 72, the ejector rod panel 7, and the ejector rod bottom plate 6 can be reset, so that the first ejector rods 71 and the second ejector rods 72 will not affect the production of the next automotive lamp housing.

[0039] As Figures 1 to 6 As shown in the figure, two cushion blocks 4 are fixedly connected to both sides of the bottom surface of the moving template 3 by screws; the bottom of the cushion block 4 is fixedly connected to a moving die bottom plate 5; four guide posts 34 are fixedly connected to the top surface of the moving die bottom plate 5 between the two cushion blocks 4; the ejector rod panel 7 and the ejector rod bottom plate 6 are fixedly connected with guide sleeves corresponding to the guide posts 34; the guide posts 34 are slidably connected inside the guide sleeves; both the ejector rod panel 7 and the ejector rod bottom plate 6 are slidably connected between the two cushion blocks 4; a push hole 53 is opened at the center of the moving die bottom plate 5.

[0040] During operation, in order to restrict the movement trajectories of the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6, and to prevent deviations when the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6 move, which may cause the inability to push out the automotive lamp housing. Also, during mold closing, the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6 will not disengage from the moving template 3. By setting the spacer blocks 4 and the moving mold base, the base of the mold is formed, and the distance between the moving template 3 and the moving mold base is the moving distance of the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6, avoiding the first ejector rod 71 and the second ejector rod 72 moving upward too far and hitting the cavity 26, causing scratches on the surface of the cavity 26, which affects the uneven surface of the automotive lamp housing after production. And since the ejector rod base plate 6 is used to support the first ejector rod 71 and the second ejector rod 72 on the ejector rod panel 7, the guide bushings and screws fix the ejector rod panel 7 and the ejector rod base plate 6 together, so that when the first ejector rod 71 and the second ejector rod 72 move, they will not shake. The guide pillars 34 also make the movement of the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6 more stable, achieving the avoidance of the first ejector rod 71 and the second ejector rod 72 moving upward too far and hitting the cavity 26, causing scratches on the surface of the cavity 26, which affects the uneven surface of the automotive lamp housing after production, and also making the movement of the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6 more stable.

[0041] As Figures 1 to 6 shown, on the top surface of the moving mold base plate 5, two support columns 52 are fixedly connected on both sides of the push hole 53; the support columns 52 are slidably connected to the ejector rod panel 7 and the ejector rod base plate 6, and the support columns 52 penetrate through the ejector rod panel 7 and the ejector rod base plate 6; four limit columns 74 are fixedly connected to the top surface of the ejector rod panel 7.

[0042] During operation, the support columns 52 are used to support the moving template 3 and improve the strength of the moving template 3. Since the support of the moving template 3 depends on the support of the two spacer blocks 4 on the side wall of the moving template 3, but the area of the moving template 3 is large, and when the injection machine injects into the mold, the pressure is high. If there is no support at the center of the bottom of the moving template 3, the moving template 3 will deform, thus affecting the quality of the automotive lamp housing. In order to prevent the first spring 76 from being overcompressed and to prevent the first ejector rod 71 and the second ejector rod 72 from moving upward excessively, four limit columns 74 are provided on the ejector rod panel 7. When the ejector rod panel 7 moves upward continuously, the limit columns 74 will prevent the top plate panel from moving upward further, achieving that the first spring 76 will not be overcompressed, thus ensuring the elasticity of the first spring 76 and ensuring the reset of the first ejector rod 71, the second ejector rod 72, the ejector rod panel 7, and the ejector rod base plate 6.

[0043] As Figures 1 to 6As shown, four garbage nails 51 are fixedly connected to the top surface of the movable mold bottom plate 5, and the garbage nails 51 are located between the two pads 4; the top surface of the garbage nails 51 contacts the bottom surface of the top rod bottom plate 6; the garbage nails 51 are made of steel, and the top end of the garbage nails 51 is parallel to the bottom surface of the top rod bottom plate 6.

[0044] During operation, there will be no post-processing of the appearance after the automobile lamp housing is formed, so the requirements for the No. 1 ejector pin 71 are relatively high. There should be no obvious marks where the No. 1 ejector pin 71 contacts the product, so the ejector bottom plate 6 must ensure flatness. If the garbage nail 51 is not placed, it is possible that when the mold is opened, debris and waste will adhere between the ejector bottom plate 6 and the movable mold bottom plate 5, causing the ejector bottom plate to be uneven after resetting, so that the No. 1 ejector pin 71 cannot be fully returned to its position, resulting in the quality of the automobile lamp housing being affected.

[0045] like Figures 1 to 4 As shown, the top surface of the cavity 26 is fixedly connected to a fixed template 2; a No. 1 flow channel 8 is fixedly connected to both the core 31 and the cavity 26; the output end and the input end of the No. 1 flow channel 8 in the cavity 26 both pass through the fixed template 2, and the output end and the input end of the No. 1 flow channel 8 in the core 31 both pass through the movable template 3; the No. 1 flow channel 8 is a U-shaped flow channel, and the No. 1 flow channel 8 is respectively located on the side walls of the core 31 and the cavity 26.

[0046] During operation, a large amount of heat is released when the raw material solidifies in the mold. If the heat is not dissipated in time, it will affect the solidification speed of the raw material, thereby reducing the production efficiency of the automobile lamp shell. If the solidification speed of the raw material is too fast, cracks or bubbles may be generated on the surface of the finished automobile lamp shell. By respectively setting a No. 1 flow channel 8 in the core 31 and the cavity 26, a coolant flows in the No. 1 flow channel 8. The coolant circulates in the No. 1 flow channel 8 to take away the heat released when the raw material solidifies. In order to ensure that the solidification rate of the raw material is not too fast, the flow rate of the coolant can be adjusted to ensure the solidification rate of the raw material, thereby realizing the regulation of the solidification rate of the raw material and ensuring the production efficiency and quality of the automobile lamp shell.

[0047] like Figures 1 to 4 As shown, the top surface of the movable mold plate 3 is fixedly connected to the movable mold base plate 5; a mounting hole is opened at the center of the movable mold base plate 5; a positioning ring 11 is fixedly connected to the top surface of the movable mold base plate 5 corresponding to the mounting hole; a gate sleeve 21 is installed on the movable mold plate 3 corresponding to the positioning ring 11; the gate sleeve 21 passes through the movable mold plate 3 and the cavity 26; and a diverter channel 36 is opened on the top surface of the core 31 corresponding to the gate sleeve 21.

[0048] During operation, to ensure that the injection nozzle of the injection molding machine can accurately align with the opening of the sprue bushing 21, a locating ring 11 is fixedly connected to the center of the top of the moving mold base plate 5. When the injection molding machine is installed with the mold, the injection molding machine can fix the positional relationship between the mold and the injection molding machine through the locating ring 11, and can accurately align the injection nozzle of the injection molding machine with the opening of the sprue bushing 21, realizing that the injection nozzle of the injection molding machine can accurately align with the opening of the sprue bushing 21, so that the raw material can smoothly pass through the sprue bushing 21 and enter the mold.

[0049] As Figures 1 to 8 shown, two locating pins 22 are symmetrically and fixedly connected to the bottom surface of the sprue bushing 21; sliding grooves are symmetrically formed on the side walls of the two locating pins 22; annular clamping grooves are formed on the side walls of the two locating pins 22; positioning grooves are formed on the moving template 3 corresponding to the locating pins 22; protrusions are arranged on the side walls of the positioning grooves corresponding to the sliding grooves; the protrusions are slidably connected to the sliding grooves; two annular clamping blocks 23 are slidably connected to the positioning grooves corresponding to the annular clamping grooves; the two annular clamping blocks 23 are clamped in the annular clamping grooves; two connecting rods 24 are fixedly connected to the side walls of the annular clamping blocks 23 away from the locating pins 22; a second spring 25 is fixedly connected to one end of the connecting rod 24 away from the annular clamping block 23; rounded corners are formed on the contact surfaces of the annular clamping blocks 23 and the locating pins 22.

[0050] During operation, since the raw material enters the mold through the sprue bushing 21, when the automotive lamp housing solidifies and forms in the mold, residual waste will adhere to the inner wall of the sprue bushing 21, affecting the rate of the next raw material entering the mold. When the raw material has not completely filled the gap formed by the core 31 and the cavity 26 and starts to solidify, the quality of the automotive lamp housing does not meet the standard. Therefore, the sprue bushing 21 needs to be frequently replaced. By directly pressing the sprue bushing 21 into the fixed template 2, the locating pins 22 on the sprue bushing 21 will be inserted into the positioning grooves, and the protrusions in the positioning grooves will be stuck with the sliding grooves, so that the sprue bushing 21 will not shake under the action of the positioning grooves and the protrusions, making the positional relationship between the bottom end of the sprue bushing 21 and the runner 36 more accurate. When the bottom end of the locating pin 22 touches the two annular clamping blocks 23, the annular clamping blocks 23 will be pushed open, enabling the locating pin 22 to pass through the annular clamping blocks 23. Subsequently, the annular clamping blocks 23 will, under the action of the second spring 25, clamp the locating pin 22, fixing the locating pin 22. When replacing the sprue bushing 21, only a little more force is needed to remove the sprue bushing 21 from the fixed template 2. Since the injection molding machine applies a force to the sprue bushing 21 when injecting raw material into the mold through the sprue bushing 21, the sprue bushing 21 will be more stably fixed on the fixed template 2, realizing the rapid installation and disassembly of the sprue bushing 21 on the fixed template 2 and improving the use efficiency of the mold.

[0051] As Figures 1 to 4As shown, two sets of inserts 32 are snap-connected inside the core 31; on both sides of the top surface of the moving template 3, first grooves are respectively formed; a slider 33 is slidably connected inside the first groove; one end of the slider 33 close to the core 31 contacts the side wall of the core 31; an inclined hole is formed through the slider 33; a diagonal rod 35 is fixedly connected to the fixed template 2 corresponding to the inclined hole.

[0052] During operation, the buckle position on the side wall of the car lamp housing is perpendicular to the mold opening direction, and it is very difficult for the buckle structure to be formed by the core 31 moving in the demolding direction. Only the slider 33 perpendicular to the mold opening direction in the mold can be used to realize the buckle structure on the side wall of the car lamp housing. By setting the slider 33, the slider 33 contacts the core 31, and the gap formed between the slider 33 and the core 31 conforms to the buckle structure on the side wall of the car lamp housing. After the raw material solidifies in the mold to form the car lamp housing, when the mold is opened, the fixed mold assembly and the moving mold assembly are separated. The diagonal rod 35 will slide in the inclined hole. When sliding, the slider 33 will slide outwards from the mold, so that the slider 33 is separated from the car lamp housing, and the slider 33 will not prevent the car lamp housing from being pushed out from the core 31. After the car lamp housing is removed, the mold is closed, and the fixed mold assembly and the moving mold assembly are closed. When closing, the diagonal rod 35 slides in the inclined hole. When sliding, the slider 33 will slide inwards from the mold under the action of the diagonal rod 35, so that the slider 33 contacts the core 31, realizing the formation of the buckle structure on the side wall of the car lamp housing and facilitating the removal of the car lamp housing after molding.

[0053] Embodiment 2

[0054] As Figure 10 As shown, compared with Embodiment 1, another implementation manner of the present invention is: a wedge block 9 is fixedly connected to the side wall of the slider 33 away from the core 31; a protrusion is arranged on the top of the wedge block 9; a first hole is formed on the top surface of the protrusion; a second groove is formed on the bottom surface of the moving template 3 corresponding to the protrusion; a limiting screw 91 is fixedly connected to the top surface of the second groove corresponding to the first hole.

[0055] During operation, since the closing and opening between the movable mold assembly and the fixed mold assembly are guided by the guide column 34 to limit the movement of the mold, since the movable mold assembly and the fixed mold assembly need to move, there is a gap between the guide column 34 and the movable mold assembly and the fixed mold assembly, so that the movable mold assembly and the fixed mold assembly will have a left and right swing margin when closing and opening, which may cause the movable mold assembly and the fixed mold assembly to be not closed tightly, resulting in a loose gap between the core 31 and the cavity 26, leakage of raw materials, and the inability to form the automobile lamp shell. Therefore, in order to improve the tightness of the closure of the movable mold assembly and the fixed mold assembly, a wedge block 9 is set on the side wall of the slider 33 when the fixed mold assembly and the movable mold assembly are closed. The wedge block 9 will be engaged with the No. 2 groove to play a positioning effect, and the limit screw 91 in the No. 2 groove will be inserted into the No. 1 hole in the wedge block 9, which can improve the positioning effect and make the fixed mold assembly and the movable mold assembly tighter when closed.

[0056] Working principle: the raw material is injected into the mold through the injection molding machine. The raw material first enters the mold through the gate sleeve 21, and then the raw material flows into the gap formed between the core 31 and the cavity 26 through the branch channel 36. As the raw material flows, the raw material will fill the gap formed between the core 31 and the cavity 26. Then the raw material is cooled in the mold. Since the raw material will shrink during cooling, the injection molding machine needs to maintain the pressure of the mold to ensure that there will be no defects due to shrinkage during the solidification of the raw material. After the pressure maintenance is completed, the automobile lamp shell needs to be taken out. When taking it out, the ejector rod of the injection molding machine first pushes the ejector bottom plate 6, and the ejector bottom plate 6 drives the No. 2 ejector 72 and the cutter 73 to move upward for a distance, so that the cutter 73 cuts the automobile lamp shell and the solidified waste in the branch channel 36. Then the mold is opened, and the ejector rod of the injection molding machine continues to push the ejector bottom plate 6, and the ejector bottom plate 6 drives the No. 1 ejector to move upward, and the No. 1 ejector 71 removes the automobile lamp shell from the core 31. The first spring 76 is squeezed, and the base of the mold is formed by setting the cushion block 4 and the movable mold base, and the distance between the movable mold plate 3 and the movable mold base is the moving distance of the first ejector pin 71, the second ejector pin 72, the ejector panel 7, and the ejector bottom plate 6, which avoids the first ejector pin 71 and the second ejector pin 72 from moving upward too far, resulting in the ejection to the cavity 26, scratching the surface of the cavity 26, affecting the uneven surface after the production of the automobile lamp housing, and because the ejector bottom plate 6 is used to support The No. 1 push rod 71 and the No. 2 push rod 72 on the push rod panel 7, the guide sleeve and the screw fix the push rod panel 7 and the push rod bottom plate 6 together, so that the No. 1 push rod 71 and the No. 2 push rod 72 will not shake when moving, and the guide column 34 also makes the movement of the No. 1 push rod 71, the No. 2 push rod 72, the push rod panel 7, and the push rod bottom plate 6 more stable. Then, under the action of the No. 1 spring 76, the No. 1 push rod 71, the No. 2 push rod 72, the push rod panel 7, and the push rod bottom plate 6 are reset, and the mold is closed.

[0057] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. An automotive lamp housing forming mold, characterized in that: It includes a moving mold assembly and a fixed mold assembly; the moving mold assembly includes a core (31); the fixed mold assembly includes a cavity (26); The core (31) and the cavity (26) are correspondingly arranged as two cavities in one mold. A runner (36) is opened at the top of the core (31) between the two mold cavities. Activity slots are opened at both ends of the runner (36) inside the core (31). A cutting knife (73) is slidably connected in the activity slot. A second ejector rod (72) is fixedly connected to the bottom of the cutting knife (73). The second ejector rod (72) is slidably connected to an ejector rod panel (7), a moving template (3), and the core (31), and the second ejector rod (72) penetrates through the ejector rod panel (7), the moving template (3), and the core (31). The end of the second ejector rod (72) away from the cutting knife (73) is clamped at the bottom of the ejector rod panel (7); A moving mold bottom plate (5) is fixedly connected to the top surface of the moving template (3). A mounting hole is opened at the center of the moving mold bottom plate (5). A locating ring (11) is fixedly connected to the top surface of the moving mold bottom plate (5) corresponding to the mounting hole. A sprue bushing (21) is installed on the moving template (3) corresponding to the locating ring (11). The sprue bushing (21) penetrates through the moving template (3) and the cavity (26); Two locating pins (22) are symmetrically and fixedly connected to the bottom surface of the sprue bushing (21). Slide grooves are symmetrically opened on the side walls of the two locating pins (22). Annular clamping grooves are opened on the side walls of the two locating pins (22). Locating grooves are opened on the moving template (3) corresponding to the locating pins (22). Protrusions are arranged on the side walls of the locating grooves corresponding to the slide grooves. The protrusions are slidably connected to the slide grooves. Two annular clamping blocks (23) are slidably connected to the locating grooves corresponding to the annular clamping grooves. The two annular clamping blocks (23) are clamped in the annular clamping grooves. Two connecting rods (24) are fixedly connected to the side walls of the annular clamping blocks (23) away from the locating pins (22). A second spring (25) is fixedly connected to the end of the connecting rod (24) away from the annular clamping block (23); Two groups of inserts (32) are clamped inside the core (31). First slots are opened on both sides of the top surface of the moving template (3). Sliders (33) are slidably connected in the first slots. The end of the slider (33) close to the core (31) contacts the side wall of the core (31). An inclined hole is penetrated through the inside of the slider (33). An inclined rod (35) is fixedly connected to the fixed template (2) corresponding to the inclined hole.

2. The forming die for an automobile lamp housing according to claim 1, characterized in that: A plurality of first ejector rods (71) are snap-connected to the bottom of the ejector rod panel (7); the plurality of first ejector rods (71) are slidably connected inside the ejector rod panel (7), the moving template (3), and the core (31), and the first ejector rods (71) penetrate through the ejector rod panel (7), the moving template (3), and the core (31); the plurality of first ejector rods (71) are symmetrically distributed at the bottom of the core (31); return rods (75) are fixedly connected to the four corners of the top surface of the ejector rod panel (7); a first spring (76) is sleeved outside the return rods (75); an ejector rod bottom plate (6) is fixedly connected to the bottom of the ejector rod panel (7); and the ends of the return rods (75) away from the ejector rod panel (7) are slidably connected inside the moving template (3).

3. The automotive lamp housing forming mold according to claim 2, wherein: Two cushion blocks (4) are fixedly connected to both sides of the bottom surface of the moving template (3); a moving die bottom plate (5) is fixedly connected to the bottom of the cushion blocks (4); four guide columns (34) are fixedly connected to the top surface of the moving die bottom plate (5); the ejector rod panel (7) and the ejector rod bottom plate (6) are fixedly connected with guide sleeves corresponding to the guide columns (34); the guide columns (34) are slidably connected inside the guide sleeves; the ejector rod panel (7) and the ejector rod bottom plate (6) are both slidably connected between the two cushion blocks (4); and a push hole (53) is formed at the center of the moving die bottom plate (5).

4. A molding die for an automobile lamp housing according to claim 3, characterized in that: Two support columns (52) are fixedly connected to the top surface of the moving die bottom plate (5); the support columns (52) are slidably connected with the ejector rod panel (7) and the ejector rod bottom plate (6), and the support columns (52) penetrate through the ejector rod panel (7) and the ejector rod bottom plate (6); and four limit columns (74) are fixedly connected to the top surface of the ejector rod panel (7).

5. The automotive lamp housing forming mold according to claim 2, characterized in that: Four trash pins (51) are fixedly connected to the top surface of the moving die bottom plate (5); the top surfaces of the trash pins (51) are in contact with the bottom surface of the ejector rod bottom plate (6); the trash pins (51) are made of steel, and the tops of the trash pins (51) are parallel to the bottom surface of the ejector rod bottom plate (6).

6. The automotive lamp housing forming die according to claim 1, wherein: A fixed template (2) is fixedly connected to the top surface of the cavity (26); a first runner (8) is fixedly connected inside both the core (31) and the cavity (26); the output end and the input end of the first runner (8) inside the cavity (26) penetrate through the fixed template (2), and the output end and the input end of the first runner (8) inside the core (31) penetrate through the moving template (3).

7. A molding die for an automobile lamp housing according to claim 1, wherein: A wedge block (9) is fixedly connected to the side wall of the slider (33) away from the core (31); a protrusion is provided at the top of the wedge block (9); a first hole is formed in the top surface of the protrusion; a second groove is formed in the bottom surface of the moving template (3) corresponding to the protrusion; and a limit screw (91) is fixedly connected to the top surface inside the second groove corresponding to the first hole.

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