Double-color mold of automobile HUD curved surface reflector

Abstract

The invention relates to a double-color mold for an automobile HUD curved surface reflector, in particular to a double-color mold for improving a microswitch mounting mode. The microswitch is mounted on the rotatable mounting plate, so that the contact of the microswitch is prevented from being excessively pressed by the pressing block. The mold comprises a first front mold, a second front mold, a bottom plate, a rear mold, a movable plate, a pressing block, a microswitch and the like. In the mold closing process, the pressing block is in contact with a contact of the microswitch to trigger the microswitch; when the contact is pressed to a limit position, the mounting plate rotates to protect the microswitch from being damaged. The double-color mold structure not only effectively prevents the microswitch from being damaged and improves the stability and reliability of the mold, but also has high adaptability, is suitable for mold production with high precision requirements, and is particularly applied to the fields of automobile HUD reflectors and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and specifically to a two-color mold for an automotive HUD curved mirror. Background Art

[0002] A two-color mold is a mold that can complete the injection molding of two different materials or colors in one injection process. Its working principle is through the alternating mold closing process of two molds, injecting plastics of different colors or different materials into the mold cavity to complete complex two-color injection molding. Two-color molds are usually used to produce plastic products that require the combination of different colors or different materials.

[0003] In the application of two-color molds, the rotary two-color mold is a common design. The rotary two-color mold makes the two mold cavities of the mold work alternately during mold closing by rotating the bottom plate. Specifically, the rotary two-color mold usually includes a first front mold, a second front mold, a rear mold, and a bottom plate. The rear mold is fixed on the bottom plate, and the bottom plate is used to drive the rear mold to rotate so that the rear mold is successively closed with the first front mold and the second front mold. When the rear mold is closed with the first front mold, a first cavity is formed for the first injection molding to obtain an intermediate part. Then the rear mold is separated from the first front mold. At this time, the intermediate part on the rear mold does not discharge material. Then the bottom plate drives the rear mold to rotate 180 degrees, and then the rear mold is closed with the second front mold to form a second cavity for the second injection molding on the basis of the intermediate part, and finally a finished part composed of two materials is obtained.

[0004] However, the rotary two-color mold often faces some challenges during use. Due to the complexity and high-precision requirements of the mold, any installation error or improper operation may lead to poor mold matching, especially in the use of microswitches. Microswitches are often used to detect whether the mold is fully closed. The contact of the microswitch usually contacts the pressure block in the mold to judge the mold closing state. However, due to installation errors or other reasons, the pressure block may exert too much pressure on the microswitch during mold closing, resulting in damage to the microswitch, thereby affecting the accuracy of the mold closing signal and the normal operation of the mold.

[0005] In the traditional two-color mold design, the installation position and structure of the microswitch are often fixed. This makes it easy for the contact of the microswitch to be damaged if there is an installation error or the contact position between the microswitch and the pressure block is improper during mold closing. Over time, frequent use of the mold may lead to the failure of the microswitch, thus affecting the stability and production efficiency of the entire two-color injection process. Summary of the Invention

[0006] The present application provides a two-color mold for an automotive HUD curved mirror, which can avoid excessive pressure on the microswitch during mold closing, thereby protecting the microswitch from being damaged.

[0007] The two-color mold of the automotive HUD curved mirror provided by this application includes a first front mold, a second front mold, a bottom plate, and a rear mold. The rear mold is fixed on the bottom plate, and the bottom plate is used to drive the rear mold to rotate so that the rear mold is successively combined with the first front mold and the second front mold.

[0008] The rear mold includes a rear mold base plate, a rear mold seat, a rear mold support plate, and a rear mold plate that are successively stacked on the bottom plate. The rear mold base plate is fixed to the bottom plate.

[0009] An active plate that can move along the mold opening and closing direction is arranged between the rear mold support plate and the rear mold base plate. The lower ends of multiple cylinders are all connected to the active plate. The multiple cylinders all penetrate through the rear mold support plate and the rear mold plate successively along the mold opening and closing direction. The upper ends of the multiple cylinders all protrude from the upper surface of the rear mold plate when the mold is opened. A first spring is sleeved on each cylinder. One end of each first spring is connected to the active plate, and the other end of each first spring is connected to the rear mold plate. The first spring is used to apply an upward pulling force to the active plate, and a pressure block is arranged on the active plate.

[0010] A mounting plate is rotatably arranged on the rear mold base plate. The rotation axis of the mounting plate is perpendicular to the mold opening and closing direction. A microswitch is fixedly installed on the mounting plate, and the contact of the microswitch is used to contact the pressure block.

[0011] A ejector rod is movably arranged on the bottom plate. The ejector rod can move along the mold opening and closing direction. The upper end of the ejector rod abuts against the bottom of the mounting plate. A second spring is arranged on the bottom plate, and the second spring is used to apply an upward pushing force to the ejector rod.

[0012] When the two-color mold is in the mold opening state, the first spring contracts to drive the active plate to move upward. At this time, the pressure block does not contact the contact of the microswitch, the mounting plate is in a horizontal state, and the upper ends of the multiple cylinders all protrude from the upper surface of the rear mold plate.

[0013] When the two-color mold is in the mold closing state, the first front mold or the second front mold simultaneously presses down the multiple cylinders. At this time, the pressure block moves downward synchronously with the active plate to press down and trigger the contact of the microswitch, and the first springs are all in a stretched state.

[0014] When the pressure block presses the contact of the microswitch to the limit position and the pressure block continues to move downward, the pressure block drives the mounting plate to rotate downward through the microswitch. At this time, the mounting plate presses down the ejector rod, and the second spring is compressed.

[0015] Preferably, the ejector rod successively includes a first rod body, a second rod body, and a third rod body from top to bottom. The first rod body, the second rod body, and the third rod body are coaxially arranged. The diameters of the first rod body and the third rod body are both smaller than that of the second rod body. A stepped hole is provided on the bottom plate, and the stepped hole penetrates the upper and lower surfaces of the bottom plate. The stepped hole includes a first hole with a larger diameter and a second hole with a smaller diameter. The first hole is located below the second hole. The second rod body and the third rod body are both located in the first hole. The upper end surface of the second rod body abuts against the step surface of the stepped hole. The first rod body extends upward through the second hole and then into the rear mold base plate. The upper end of the first rod body abuts against the bottom of the mounting plate. The lower end of the first hole is sealed by an end cap. The third rod body penetrates the end cap movably, and the lower end surface of the third rod body is flush with the lower end surface of the end cap. A scale is provided on the third rod body along the axial direction. The second spring is sleeved on the third rod body. One end of the second spring abuts against the lower end surface of the second rod body, and the other end of the second spring abuts against the end cap.

[0016] Preferably, a cylindrical portion is provided on the end cap. The cylindrical portion is inserted into the first hole and is threadedly connected to the inner wall of the first hole. The lower end surface of the end cap is flush with the lower surface of the bottom plate.

[0017] Preferably, a vertically extending notch is provided on the side wall of the movable plate. The pressing block is arranged in the notch. A waist-shaped hole extending vertically is provided on the pressing block. A bolt passes through the waist-shaped hole and is screwed onto the bottom surface of the notch. The bolt is used to fix the pressing block in the notch. When the bolt is loosened, the pressing block can move up and down along the notch.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0019] Through the design of the present invention, the microswitch is no longer directly fixed, but is installed through a rotatable mounting plate. In this way, not only can the mold closing state be accurately detected, but also the damage of the microswitch caused by installation errors can be avoided. The specific effects are as follows:

[0020] 1. Avoid damage: The microswitch can adapt to the movement of the pressing block during the mold closing process. By rotating the mounting plate, the microswitch is prevented from being overly pressed, thereby avoiding its damage.

[0021] 2. Improve mold stability: This design improves the stability of the mold during the production process, avoids production interruptions caused by the damage of the microswitch, and increases the service life of the mold.

[0022] 3. Strong adaptability: Even if there are installation errors, this design can still ensure the normal operation of the microswitch and has a high fault tolerance.

[0023] 4. Improve production efficiency: Since the microswitch is not easily damaged, the mold closing state can be stably judged, thereby improving the production efficiency. Brief Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a structural schematic diagram of the present invention;

[0026] Figure 2 is a top view of the present invention;

[0027] Figure 3 is Figure 2 a sectional view taken along the A-A direction in

[0028] Figure 4 is Figure 2 a sectional view taken along the B-B direction in

[0029] Figure 5 is Figure 4 an enlarged view of area A in

[0030] Figure 6 is Figure 2 a sectional view taken along the C-C direction in

[0031] Figure 7 is Figure 6 an enlarged view of area B in

[0032] Explanation of reference numerals: 10, the first front mold; 20, the second front mold; 30, the bottom plate; 31, the first hole; 32, the end cover;

[0033] 40, the rear mold; 41, the rear mold base plate; 42, the rear mold seat; 43, the rear mold support plate; 44, the rear mold plate; 45, the movable plate; 451, the notch; 46, the column; 47, the first spring;

[0034] 50, the pressing block; 501, the kidney-shaped hole; 502, the bolt;

[0035] 60, the mounting plate; 61, the pin shaft; 70, the microswitch; 71, the contact;

[0036] 80, the ejector rod; 81, the first rod body; 82, the second rod body; 83, the third rod body;

[0037] 90, the second spring. Detailed Embodiments

[0038] As Figures 1 to 7As shown in the figure, the two-color mold of the automotive HUD curved mirror in this embodiment includes a first front mold 10, a second front mold 20, a bottom plate 30, and a rear mold 40. The rear mold 40 is fixed to the bottom plate 30 by fasteners. The bottom plate 30 can be driven by a driving mechanism to rotate. The bottom plate 30 is used to drive the rear mold 40 to rotate so that the rear mold 40 is successively clamped with the first front mold 10 and the second front mold 20. When the rear mold 40 is clamped with the first front mold 10, a first cavity is formed for the first injection molding to obtain an intermediate part. Then the rear mold 40 is separated from the first front mold 10. At this time, the intermediate part on the rear mold does not eject the material. Then the bottom plate 30 drives the rear mold 40 to rotate 180 degrees. Then the rear mold 40 is clamped with the second front mold 20 to form a second cavity for the second injection molding on the basis of the intermediate part, and finally a finished part composed of two materials is obtained.

[0039] The rear mold 40 includes a rear mold base plate 41, a rear mold seat 42, a rear mold support plate 43, and a rear mold plate 44 that are successively stacked on the bottom plate 30. The rear mold base plate 41 is fixed to the bottom plate 30 by fasteners. The rear mold seat 42, the rear mold support plate 43, and the rear mold plate 44 are successively stacked and fixed on the rear mold base plate 41. When the rear mold plate 44 is clamped with the first front mold 10, a first cavity is formed. When the rear mold plate is clamped with the second front mold 20, a second cavity is formed.

[0040] An activity plate 45 that can move along the mold opening and closing direction is provided between the rear mold support plate 43 and the rear mold base plate 41. That is to say, a hollow area is provided on the rear mold seat 42, and the activity plate 45 is located in this hollow area, so that the activity plate 45 can move up and down in the hollow area. The lower ends of the four columns 46 are all connected to the activity plate 45. A plurality of columns 46 all penetrate through the rear mold support plate 43 and the rear mold plate 44 successively along the mold opening and closing direction. The upper ends of the plurality of columns 46 all protrude from the upper surface of the rear mold plate 44 when the mold is opened. A first spring 47 is sleeved on each column 46. One end of each first spring 47 is connected to the activity plate 45, and the other end of each first spring 47 is connected to the rear mold plate 44. The first spring 47 is used to apply an upward pulling force to the activity plate 45. A pressing block 50 is provided on the activity plate 45. That is to say, the first spring 47 is a tension spring. In the mold open state, the first spring 47 pulls the activity plate 45 upward, and the columns 46 move upward synchronously with the activity plate, so that the upper ends of the columns 46 all protrude from the upper surface of the rear mold plate 44. At this time, the pressing block 50 does not contact the contact 71 of the microswitch 70, and the pressing block 50 is located above the microswitch 70.

[0041] A mounting plate 60 is rotatably arranged on a rear mold base plate 41. A recess is arranged on the side wall of the rear mold base plate 41. The mounting plate 60 is arranged in the recess. The mounting plate 60 is mounted on the rear mold base plate 41 through a pin shaft 61. The mounting plate 60 can rotate around the pin shaft 61. The pin shaft 61 is horizontally arranged, so that the mounting plate 60 can be turned up and down. The rotation axis of the mounting plate 60 is perpendicular to the mold opening and closing direction. A micro switch 70 is fixedly mounted on the mounting plate 60. The contact 71 of the micro switch 70 is located at the top of the micro switch 70. The contact 71 of the micro switch 70 is used to contact with a pressing block 50. The pressing block 50 is located above the contact 71 of the micro switch 70.

[0042] A ejector rod 80 is movably arranged on a bottom plate 30. The ejector rod 80 can move along the mold opening and closing direction, that is to say, the ejector rod 80 is vertically arranged and can move up and down. The upper end of the ejector rod 80 abuts against the bottom of the mounting plate 60. A second spring 90 is arranged on the bottom plate 30. The second spring 90 is used to apply an upward thrust to the ejector rod 80. The second spring 90 is a compression spring. The upper end of the ejector rod 80 abuts against a position on the bottom of the mounting plate 60 far away from the pin shaft 61. The ejector rod 80 forms a support for the mounting plate 60, so that in the mold opening state, the mounting plate 60 is in a horizontal state.

[0043] The ejector rod 80 sequentially includes a first rod body 81, a second rod body 82 and a third rod body 83 from top to bottom. The first rod body 81, the second rod body 82 and the third rod body 83 are integrally formed. The first rod body 81, the second rod body 82 and the third rod body 83 are coaxially arranged. The diameters of the first rod body 81 and the third rod body 83 are both smaller than that of the second rod body 82.

[0044] A stepped hole is provided on the bottom plate 30. The stepped hole penetrates the upper and lower surfaces of the bottom plate 30. The stepped hole includes a first hole 31 with a larger diameter and a second hole with a smaller diameter. The first hole 31 is located below the second hole. Both the second rod body 82 and the third rod body 83 are located in the first hole 31. The upper end surface of the second rod body 82 abuts against the stepped surface of the stepped hole. The stepped surface of the stepped hole is the connecting surface of the first hole 31 and the second hole. The first rod body 81 passes upward through the second hole and extends into the rear mold base plate 41. The upper end of the first rod body 81 abuts against the bottom of the mounting plate 60. The lower end of the first hole 31 is sealed by an end cap 32. The third rod body 83 penetrates the end cap 32 movably. The lower end surface of the third rod body 83 is flush with the lower end surface of the end cap 32. The third rod body 83 is provided with scales along the axial direction. The second spring 90 is sleeved on the third rod body 83. One end of the second spring 90 abuts against the lower end surface of the second rod body 82, and the other end of the second spring 90 abuts against the end cap 32, so that the ejector rod 80 can move up and down in the stepped hole. When the mold is closed, if the contact 71 is pressed by the pressing block 50 to the limit position and the pressing block 50 continues to press down, the pressing block 50 will drive the mounting plate 60 to turn downward through the microswitch 70 to prevent the contact of the microswitch 70 from being damaged by the pressing block 50. When the mounting plate 60 turns downward, it presses down the ejector rod 80. When the ejector rod 80 moves downward, the second spring 90 is compressed and the second spring 90 stores energy. And the lower end of the third rod body 83 extends downward out of the lower end surface of the end cap 32. Since there are scales on the third rod body 83, the distance that the ejector rod 80 moves downward can be read through the scales, so that the amplitude of the downward turn of the mounting plate 60 can be calculated, and thus the installation positions of the pressing block 50 or the microswitch 70 can be adjusted precisely.

[0045] A cylindrical part is provided on the end cap 32. The cylindrical part is inserted into the first hole 31 and is threadedly connected to the inner wall of the first hole 31. The lower end surface of the end cap 32 is flush with the lower surface of the bottom plate 30. In this way, the installation and disassembly of the end cap 32 are relatively convenient.

[0046] A vertically extending notch 451 is provided on the side wall of the movable plate 45. The pressing block 50 is arranged in the notch 451. A vertically extending waist-shaped hole 501 is provided on the pressing block 50. A bolt 502 passes through the waist-shaped hole 501 and is screwed onto the bottom surface of the notch 451. The bolt 502 is used to fix the pressing block 50 in the notch 451. When the bolt 502 is loosened, the pressing block 50 can move up and down along the notch 451 to facilitate the adjustment of the installation position of the pressing block 50. After the installation position of the pressing block 50 is adjusted, the bolt 502 is tightened, and the pressing block 50 can be fixed in the notch 451.

[0047] When the two-color mold is in the open mold state, the first spring 47 contracts to drive the movable plate 45 to move upward. At this time, the pressing block 50 is not in contact with the contact point of the micro switch 70, the mounting plate 60 is in a horizontal state, and the upper ends of the plurality of columns 46 all extend out of the upper surface of the rear template 44.

[0048] When the two-color mold is in the closed mold state, the first front mold 10 or the second front mold 20 contacts the upper ends of the columns 46, thereby pressing down the plurality of columns 46 simultaneously. At this time, the pressing block 50 moves downward synchronously with the movable plate 45 to press down and trigger the contact point of the micro switch 70, and the first spring 47 is in a stretched state.

[0049] When the pressing block 50 presses down the contact point 71 of the micro switch 70 to the limit position and the pressing block 50 still needs to move downward, the pressing block 50 drives the mounting plate 60 to rotate downward through the micro switch 70. At this time, the mounting plate 60 applies a force to the upper end of the first rod 81, thereby pressing down the ejector rod 80, and the second spring 90 is compressed. In this way, the mounting plate 60 protects the micro switch 70 from being damaged by rotation, and the contact point 71 of the micro switch 70 can be normally pressed and triggered by the pressing block 50.

[0050] This specification and the drawings are only exemplary descriptions of the present application and are considered to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications.

Claims

1. A two-color mold for a car HUD curved reflector, characterized in that: The invention comprises a first front mold (10), a second front mold (20), a bottom plate (30) and a rear mold (40), wherein the rear mold (40) is fixed on the bottom plate (30), and the bottom plate (30) is used to drive the rear mold (40) to rotate so that the rear mold (40) is molded with the first front mold (10) and the second front mold (20) in sequence; The rear mold (40) comprises a rear mold base plate (41), a rear mold base (42), a rear mold supporting plate (43) and a rear mold plate (44) which are sequentially stacked on the bottom plate (30), and the rear mold base plate (41) is fixed to the bottom plate (30); A movable plate (45) capable of moving along the mold opening and closing direction is arranged between the rear mold support plate (43) and the rear mold base plate (41); the lower ends of a plurality of columns (46) are connected to the movable plate (45); the plurality of columns (46) successively penetrate the rear mold support plate (43) and the rear mold plate (44) along the mold opening and closing direction; the upper ends of the plurality of columns (46) extend out of the upper surface of the rear mold plate (44) when the mold is opened; each column (46) is sleeved with a first spring (47); one end of each first spring (47) is connected to the movable plate (45); the other end of each first spring (47) is connected to the rear mold plate (44); the first spring (47) is used to apply an upward pulling force to the movable plate (45); a pressing block (50) is arranged on the movable plate (45); A mounting plate (60) is rotatably arranged on the rear mold base plate (41), the rotation axis of the mounting plate (60) is perpendicular to the mold opening and closing direction, a micro switch (70) is fixedly mounted on the mounting plate (60), and a contact (71) of the micro switch (70) is used to contact the pressing block (50); A push rod (80) is movably arranged on the bottom plate (30), and the push rod (80) can move along the mold opening and closing direction, and the upper end of the push rod (80) is against the bottom of the mounting plate (60). A second spring (90) is arranged on the bottom plate (30), and the second spring (90) is used to apply an upward thrust to the push rod (80); When the two-color mold is in the mold opening state, the first spring (47) contracts to drive the movable plate (45) to move upward, at which time, the pressing block (50) is not in contact with the contact point of the micro switch (70), the mounting plate (60) is in a horizontal state, and the upper ends of the plurality of columns (46) extend out of the upper surface of the rear mold plate (44); When the two-color mold is in a mold-closing state, the first front mold (10) or the second front mold (20) presses down the multiple columns (46) at the same time, and at this time, the pressing block (50) moves downward synchronously with the movable plate (45) to press down the contact of the micro switch (70) to trigger, and the first spring (47) is in a stretched state; When the pressing block (50) presses the contact (71) of the micro switch (70) to the limit position and the pressing block (50) continues to move downward, the pressing block (50) drives the mounting plate (60) to rotate downward through the micro switch (70). At this time, the mounting plate (60) presses the push rod (80) downward, and the second spring (90) is compressed.

2. The two-color mold for the automotive HUD curved reflector according to claim 1, characterized in that: The top rod (80) includes a first rod body (81), a second rod body (82) and a third rod body (83) from top to bottom. The first rod body (81), the second rod body (82) and the third rod body (83) are coaxially arranged. The diameters of the first rod body (81) and the third rod body (83) are both smaller than those of the second rod body (82). A step hole is arranged on the bottom plate (30). The step hole passes through the upper and lower surfaces of the bottom plate (30). The step hole includes a first hole (31) with a larger diameter and a second hole with a smaller diameter. The first hole (31) is located below the second hole. The second rod body (82) and the third rod body (83) are both located in the first hole (31). The upper surface of the second rod body (82) is provided with a stepped hole. The end surface abuts against the step surface of the step hole, the first rod body (81) passes through the second hole upward and then extends into the rear mold base plate (41), the upper end of the first rod body (81) abuts against the bottom of the mounting plate (60), the lower end of the first hole (31) is sealed by the end cover (32), the third rod body (83) movably passes through the end cover (32), the lower end surface of the third rod body (83) is flush with the lower end surface of the end cover (32), the third rod body (83) is provided with a scale along the axial direction, the second spring (90) is sleeved on the third rod body (83), one end of the second spring (90) abuts against the lower end surface of the second rod body (82), and the other end of the second spring (90) abuts against the end cover (32).

3. The two-color mold for the automotive HUD curved reflector according to claim 2, characterized in that: The end cover (32) is provided with a columnar portion, which is inserted into the first hole (31) and is threadedly connected to the inner wall of the first hole (31), and the lower end surface of the end cover (32) is flush with the lower surface of the bottom plate (30).

4. The two-color mold for the automotive HUD curved reflector according to claim 2, characterized in that: A notch (451) extending up and down is provided on the side wall of the movable plate (45), and the pressing block (50) is arranged in the notch (451). A waist-shaped hole (501) extending up and down is provided on the pressing block (50). A bolt (502) passes through the waist-shaped hole (501) and is screwed onto the bottom surface of the notch (451). The bolt (502) is used to fix the pressing block (50) in the notch (451). When the bolt (502) is loosened, the pressing block (50) can move up and down along the notch (451).

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