Injection mold for automobile decorative plate

Abstract

The utility model discloses an injection mold for an automobile decorative plate, which comprises an upper mold and a lower mold, the upper mold is provided with an injection port and a movable chamber, a communication port is arranged between the injection port and the movable chamber, two limit rods are fixedly arranged in the movable chamber, a first spring is movably arranged on the outer side of each limit rod, and the two limit rods are respectively connected with a movable plate in a sliding manner. An electric push rod is fixedly arranged at the upper end of the upper mold, the driving end of the electric push rod is movably connected with the movable plate, a limiting screw is arranged on the upper mold in a screw connection mode, and one end of the limiting screw extends into the movable chamber to be movably connected with the movable plate; and the other end of the limiting screw rod extends to the outside of the upper mold, so that a bulge, close to an injection molding opening, of the injection-molded automobile decorative plate can be automatically cut off, the smooth surface of the injection-molded automobile decorative plate is guaranteed, and the quality of a finished product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, more specifically, it relates to a kind of injection mold for automobile decorative plate. BACKGROUND

[0002] Automobile decorative plate is used to improve the appearance of car and protect the car body. In the production process, the heated plastic is usually injected into the injection mold for injection molding. The existing injection mold for automobile decorative plate usually has an injection port, through which the heated plastic is injected into the injection mold. After cooling and molding, there will be a protrusion at the injection port, making the injection-molded automobile decorative plate near the injection port not smooth, affecting the quality of the finished product. Secondly, the existing injection mold for automobile decorative plate does not have an automatic demolding component. After injection molding, the automobile decorative plate needs to be manually removed, increasing the labor burden of the workers. At the same time, the formed parts are tightly contacted with the mold, making it difficult to demold the formed parts. SUMMARY

[0003] (I) Technical problem solved

[0004] To solve the technical problems in the prior art, the utility model provides an injection mold for automobile decorative plate to solve the technical problem that the existing injection mold for automobile decorative plate usually has an injection port, through which the heated plastic is injected into the injection mold. After cooling and molding, there will be a protrusion at the injection port, making the injection-molded automobile decorative plate near the injection port not smooth.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an injection mold for automobile decorative plate, comprising an upper mold and a lower mold, the upper mold is provided with an injection port and a movable chamber, a communication port is provided between the injection port and the movable chamber, two limiting rods are fixedly arranged in the movable chamber, a first spring is movably arranged outside each limiting rod, a moving plate is slidably connected to both limiting rods, a tool holder is installed on the moving plate, a cutting knife is fixedly arranged on one side of the tool holder, one end of the cutting knife extends into the communication port, an electric push rod is fixedly arranged at the upper end of the upper mold, the driving end of the electric push rod is movably connected to the moving plate, a limiting screw is connected to the upper mold by a screw rod, one end of the limiting screw extends into the movable chamber and is movably connected to the moving plate, the other end of the limiting screw extends to the outside of the upper mold, a placing groove is arranged in the lower mold, a pushing frame is movably arranged in the placing groove, and a lifting frame of L type is fixedly arranged on both sides of the pushing frame.

[0007] The utility model further provides for, fixedly be equipped with bottom plate in lower mould lower extreme, fixedly be equipped with support on bottom plate, fixedly be equipped with two hydraulic cylinders on support, two hydraulic cylinders drive end pass through support with upper die fixed connection, convenient for upper die removal.

[0008] The utility model further provides for, fixedly be equipped with horizontal plate respectively on both sides of lower mould, movably be equipped with lifting rod on horizontal plate, fixedly be equipped with limit board in lifting rod lower extreme, convenient for lifting rod removal.

[0009] The utility model further provides for, movably be equipped with second spring outside lifting rod, lifting rod upper end pass through horizontal plate with lifting frame fixed connection, convenient for pushing lifting frame.

[0010] The utility model further provides for, fixedly set up pull frame that cooperates with lifting frame respectively on both sides of upper die, convenient for pull frame removal.

[0011] The utility model further provides for, one side of moving plate is equipped with the installation groove of T type, movably be equipped with installation strip in installation groove, installation strip with tool holder fixed connection, convenient for installing tool holder.

[0012] The utility model further provides for, fixedly be equipped with fixed frame one side of moving plate, movably be equipped with plug-in rod on fixed frame, fixedly be equipped with movable plate on plug-in rod, movable plate both sides with fixed frame pass through rail sliding connection, convenient for plug-in rod removal.

[0013] The utility model further provides for, movably be equipped with third spring outside plug-in rod, plug-in rod one end pass through movable plate and insert into installation strip, convenient for fixed installation strip.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the utility model provides a kind of injection mould for automobile decorative plate, with following beneficial effects:

[0016] 1, by upper die, lower mould, injection port, activity room, communicating port, limit rod, first spring, moving plate, tool holder, cutting knife, electric push rod and limit screw cooperate, the convexity of automobile decorative plate formed by injection molding can be automatically cut down close to injection port, to ensure that the surface of automobile decorative plate formed by injection molding is smooth, improve the quality of finished product.

[0017] 2, by placing groove, push frame, lifting frame, bottom plate, support, hydraulic cylinder, horizontal plate, lifting rod, limit board, second spring and pull frame cooperate, can drive lifting frame and push frame to move upwards in the process that upper die moves upwards, to automatically pull out the automobile decorative plate formed by injection molding from lower mould, so that it is automatically demoulded, to reduce the labor burden of staff, it is very convenient to use.

[0018] 3、By the cooperation of the knife seat, the cutting knife, the installation slot, the installation strip, the fixing frame, the insertion rod, the movable plate and the third spring, the cutting knife can be disassembled and replaced when it is damaged, the whole disassembly process is simple to operate, and therefore the work efficiency of cutting knife maintenance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an injection mold for an automobile decorative plate in use;

[0020] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the support and its connecting components in the moving state of the upper mold;

[0021] Figure 3 It is Figure 2 It is a schematic diagram of the partial cross-sectional structure of the support and its connecting components in the moving state of the upper mold;

[0022] Figure 4 It is Figure 2 It is a schematic diagram of the partial cross-sectional structure of the support and its connecting components in the moving state of the upper mold;

[0023] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the lower mold and its connecting components in the moving state of the pushing frame.

[0024] In the figure: 1, the upper mold; 2, the lower mold; 3, the injection port; 4, the movable chamber; 5, the communication port; 6, the limiting rod; 7, the first spring; 8, the moving plate; 9, the knife seat; 10, the cutting knife; 11, the electric push rod; 12, the limiting screw; 13, the placing groove; 14, the pushing frame; 15, the lifting frame; 16, the bottom plate; 17, the support; 18, the hydraulic cylinder; 19, the cross plate; 20, the lifting rod; 21, the limiting plate; 22, the second spring; 23, the pulling frame; 24, the installation slot; 25, the installation strip; 26, the fixing frame; 27, the insertion rod; 28, the movable plate; 29, the third spring; 30, the top rod. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0027] In the utility model, in the case where no opposite statement is made, the orientation such as "upper, lower" is usually for the direction shown in the drawing, or for the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is usually for the left and right shown in the drawing; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0028] Please refer to Figures 1-5 The utility model discloses an injection mold for automobile decorative plate, including upper mould 1 and lower mould 2, be equipped with injection port 3 and movable chamber 4 on the upper mould 1, be equipped with the communicating port 5 between injection port 3 and movable chamber 4, be fixed with two limit rods 6 in movable chamber 4, first spring 7 is movably arranged on the outside of each limit rod 6, two limit rods 6 are slidably connected with moving plate 8, knife rest 9 is installed on moving plate 8, cutting knife 10 is fixed on one side of knife rest 9, one end of cutting knife 10 extends into communicating port 5, electric push rod 11 is fixed on the upper end of upper mould 1, and the driving end of electric push rod 11 is movably connected with moving plate 8, limit screw rod 12 is connected on the screw rod of upper mould 1, one end of limit screw rod 12 extends into movable chamber 4 and is movably connected with moving plate 8, and the other end of limit screw rod 12 extends to the outside of upper mould 1.

[0029] In the embodiment, after the automobile decorative plate is injection molded and cooled, the electric push rod 11 is started, the driving end of the electric push rod 11 pushes the moving plate 8 to move along the two limit rods 6, the first spring 7 is compressed, the moving plate 8 drives the knife rest 9 installed on the moving plate 8 to move, the knife rest 9 drives the cutting knife 10 to move, so that one end of the cutting knife 10 cuts the protrusion in the injection port 3 through the communicating port 5, when the driving end of the electric push rod 11 moves back and is separated from the moving plate 8, under the pushing of the first spring 7, the moving plate 8 drives the knife rest 9 and the cutting knife 10 to move back to the original position, under the limiting of the limit screw rod 12, the position of the moving plate 8 moving back can be limited, so that one end of the cutting knife 10 is still in the communicating port 5, when the heated and melted plastic is injected into the injection port 3 and then flows into the mold cavity between the upper mould 1 and the lower mould 2, the cutting knife 10 can shield the communicating port 5 to prevent the heated and melted plastic from entering the movable chamber 4.

[0030] Please refer to Figures 1-5As an embodiment of automatic demolding of the injection molded automobile decorative plate: the lower mold 2 is provided with a placing groove 13, the pushing frame 14 is movably arranged in the placing groove 13, the L-shaped lifting frame 15 is fixedly arranged on both sides of the pushing frame 14, the bottom plate 16 is fixedly arranged at the lower end of the lower mold 2, the bracket 17 is fixedly arranged on the bottom plate 16, the two hydraulic cylinders 18 are fixedly arranged on the bracket 17, the driving end of the two hydraulic cylinders 18 penetrates through the bracket 17 and is fixedly connected with the upper mold 1, the horizontal plate 19 is fixedly arranged on both sides of the lower mold 2, the lifting rod 20 is movably arranged on the horizontal plate 19, the limiting plate 21 is fixedly arranged at the lower end of the lifting rod 20, the second spring 22 is movably arranged outside the lifting rod 20, the lifting rod 20 penetrates through the horizontal plate 19 and is fixedly connected with the lifting frame 15, and the pulling frame 23 matched with the lifting frame 15 is fixedly arranged on both sides of the upper mold 1.

[0031] Specifically, the two hydraulic cylinders 18 are started, the hydraulic cylinders 18 drive the upper mold 1 to move downward, so that the upper mold 1 contacts with the lower mold 2, thereby forming a mold cavity, the molten plastic is injected into the mold cavity through the injection port 3, the cooling pipe is arranged in the lower mold 2, the cooling pipe is provided with circulating cooling liquid, and the injection molded product in the lower mold 2 and the mold cavity is cooled. Since the cooling pipe is arranged in the lower mold 2 for cooling, the specific structure and working principle are not described here. When the cooling molding is completed, the two hydraulic cylinders 18 are started, so that the upper mold 1 moves back to the original position, and the upper mold 1 drives the two pulling frames 23 to move, the pulling frame 23 drives the lifting frame 15 to move, the lifting frame 15 drives the lifting rod 20 to move, the lifting rod 20 drives the limiting plate 21 to move, the second spring 22 is compressed, and the lifting frame 15 drives the pushing frame 14 to move, so that the pushing frame 14 pushes the injection molded automobile decorative plate upward, thereby automatically demolding the injection molded automobile decorative plate. Conversely, when the pulling frame 23 is driven by the upper mold 1 to move downward, the limiting plate 21, the lifting rod 20, the lifting frame 15 and the pushing frame 14 are driven by the second spring 22 to move back to the original position. At this time, the pushing frame 14 moves back to the placing groove 13.

[0032] Please refer to Figures 1-5 As an embodiment of dismounting and replacing the cutting knife 10: the moving plate 8 is provided with a T-shaped mounting groove 24 on one side, the mounting strip 25 is movably arranged in the mounting groove 24, the mounting strip 25 is fixedly connected with the knife seat 9, the fixed frame 26 is fixedly arranged on one side of the moving plate 8, the plug rod 27 is movably arranged on the fixed frame 26, the movable plate 28 is fixedly arranged on the plug rod 27, the movable plate 28 is slidably connected with the fixed frame 26 through the track on both sides, the third spring 29 is movably arranged outside the plug rod 27, and one end of the plug rod 27 penetrates into the mounting strip 25 through the movable plate 28.

[0033] Specifically, when the cutting knife 10 needs to be replaced, the limiting screw rod 12 is rotated to move outward, and the moving plate 8 is no longer limited by the limiting screw rod 12, and is moved to one end of the movable chamber 4 under the pushing of the first spring 7. At this time, the moving plate 8 drives the knife seat 9 and the cutting knife 10 to move, so that the cutting knife 10 is completely moved into the movable chamber 4. The insertion rod 27 is pulled to drive the movable plate 28 to move, and the third spring 29 is compressed. At the same time, the end of the insertion rod 27 is separated from the mounting strip 25, the mounting strip 25 is pulled upward, so that the mounting strip 25 drives the knife seat 9 and the cutting knife 10 to be detached from the moving plate 8. The cutting knife 10, the knife seat 9 and the mounting strip 25 after replacement can be installed by using the opposite operation, and the adjustment of the limiting screw rod 12 is used to make one end of the cutting knife 10 inserted into the communicating port 5.

[0034] In summary, the overall device has the following advantages when in use:

[0035] When the automobile decorative plate needs to be injection molded, the two hydraulic cylinders 18 are started, the hydraulic cylinders 18 drive the upper mold 1 to move downward, so that the upper mold 1 contacts with the lower mold 2 to form a mold cavity. The heated and melted plastic is injected into the mold cavity through the injection port 3. The lower mold 2 is provided with a cooling pipe, and the cooling pipe is provided with circulating cooling liquid to cool the injection product in the lower mold 2 and the mold cavity. When the cooling is completed, the electric push rod 11 is started, the driving end of the electric push rod 11 pushes the moving plate 8 to move along the two limiting rods 6, the first spring 7 is compressed, the moving plate 8 drives the knife seat 9 mounted on the moving plate 8 to move, the knife seat 9 drives the cutting knife 10 to move, so that one end of the cutting knife 10 passes through the communicating port 5 to cut the protrusion in the injection port 3. When the driving end of the electric push rod 11 moves back and separates from the moving plate 8, the moving plate 8 drives the knife seat 9 and the cutting knife 10 to move back to the original position under the pushing of the first spring 7. The position of the moving plate 8 moving back can be limited by the limiting of the limiting screw rod 12, so that one end of the cutting knife 10 is still in the communicating port 5. When the heated and melted plastic is injected into the injection port 3 and then flows into the mold cavity between the upper mold 1 and the lower mold 2, the cutting knife 10 can shield the communicating port 5 to prevent the heated and melted plastic from entering the movable chamber 4.

[0036] When the injection-molded automobile decorative plate needs to be automatically demolded, the two hydraulic cylinders 18 are started, so that the upper mold 1 moves back to the original position, and the two pull frames 23 are moved by the upper mold 1, the lifting frame 15 is moved by the pull frames 23, the lifting rod 20 is moved by the lifting frame 15, the limiting plate 21 is moved by the lifting rod 20, the second spring 22 is compressed, and the pushing frame 14 is moved by the lifting frame 15, so that the pushing frame 14 pushes the injection-molded automobile decorative plate upwards to automatically demold the injection-molded automobile decorative plate, and the support 17 is provided with the ejector pin 30, which is inserted into the injection port 3 when the upper mold 1 moves upwards, and the residual plastic in the injection port 3 is ejected. Conversely, when the pull frames 23 are moved downwards by the upper mold 1, the limiting plate 21, the lifting rod 20, the lifting frame 15 and the pushing frame 14 are moved back to the original position under the pushing of the second spring 22, at which time the pushing frame 14 moves back to the placing groove 13.

[0037] When the cutting knife 10 needs to be replaced, the limiting screw 12 is rotated to move the limiting screw 12 outward, the moving plate 8 is no longer limited by the limiting screw 12, and under the pushing of the first spring 7, the moving plate 8 moves to one end of the activity chamber 4, at which time the moving plate 8 moves the knife seat 9 and the cutting knife 10, so that the cutting knife 10 is completely moved into the activity chamber 4, the insertion rod 27 is pulled, the insertion rod 27 moves the movable plate 28, the third spring 29 is compressed, and the insertion rod 27 is separated from the mounting strip 25 at one end, the mounting strip 25 is pulled upwards, so that the mounting strip 25 moves the knife seat 9 and the cutting knife 10 from the moving plate 8, the cutting knife 10, the knife seat 9 and the mounting strip 25 after replacement can be installed by using the opposite operation, and the cutting knife 10 is inserted into the communicating port 5 through the adjustment of the limiting screw 12.

[0038] In all the schemes mentioned above, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut cooperation connection, bolt or screw connection or other known connection mode, which will not be described one by one, and the welding is preferred when the fixed connection is involved, although the embodiments of the utility model have been shown and described, those skilled in the art can understand that the embodiments can be changed, modified, replaced and modified in various ways without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An injection mold for an automobile trim panel comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) is provided with an injection port (3) and a movable chamber (4), a communication port (5) is arranged between the injection port (3) and the movable chamber (4), two limiting rods (6) are fixedly arranged in the movable chamber (4), a first spring (7) is movably arranged outside each limiting rod (6), a moving plate (8) is slidably connected to the two limiting rods (6), a tool holder (9) is arranged on the moving plate (8), a cutting knife (10) is fixedly arranged on one side of the tool holder (9), one end of the cutting knife (10) extends into the communication port (5), an electric push rod (11) is fixedly arranged at the upper end of the upper mold (1), the driving end of the electric push rod (11) is movably connected with the moving plate (8), a limiting screw rod (12) is screwedly connected to the upper mold (1), one end of the limiting screw rod (12) extends into the movable chamber (4) and is movably connected with the moving plate (8), the other end of the limiting screw rod (12) extends to the outside of the upper mold (1), a placing groove (13) is arranged in the lower mold (2), a pushing frame (14) is movably arranged in the placing groove (13), and L-shaped lifting frames (15) are fixedly arranged on the two sides of the pushing frame (14).

2. The injection mold for an automobile trim panel according to claim 1, characterized by: A bottom plate (16) is fixedly arranged at the lower end of the lower mold (2), a support (17) is fixedly arranged on the bottom plate (16), two hydraulic cylinders (18) are fixedly arranged on the support (17), and the driving ends of the two hydraulic cylinders (18) pass through the support (17) and are fixedly connected with the upper mold (1).

3. The injection mold for an automobile trim panel according to claim 2, characterized by: Lateral plates (19) are fixedly arranged on the two sides of the lower mold (2), lifting rods (20) are movably arranged on the lateral plates (19), and limiting plates (21) are fixedly arranged at the lower ends of the lifting rods (20).

4. The injection mold for an automobile trim panel according to claim 3, characterized by: Second springs (22) are movably arranged outside the lifting rods (20), and the upper ends of the lifting rods (20) pass through the lateral plates (19) and are fixedly connected with the lifting frames (15).

5. The injection mold for an automobile trim panel according to claim 4, characterized by: Pulling frames (23) matched with the lifting frames (15) are fixedly arranged on the two sides of the upper mold (1).

6. The injection mold for an automobile trim panel according to any one of claims 1 or 2, characterized by: A T-shaped mounting groove (24) is arranged on one side of the moving plate (8), a mounting strip (25) is movably arranged in the mounting groove (24), and the mounting strip (25) is fixedly connected with the tool holder (9).

7. The injection mold for an automobile trim panel according to claim 6, characterized by: A fixing frame (26) is fixedly arranged on one side of the moving plate (8), a plug rod (27) is movably arranged on the fixing frame (26), a movable plate (28) is fixedly arranged on the plug rod (27), and the movable plate (28) is slidably connected with the fixing frame (26) through a track.

8. The injection mold for an automobile trim panel according to claim 7, characterized by: A third spring (29) is movably arranged outside the plug rod (27), and one end of the plug rod (27) passes through the movable plate (28) and is inserted into the mounting strip (25).

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