Automobile reflector injection mold with stripping structure

Abstract

This utility model belongs to the field of injection molds, specifically an injection mold for an automotive rearview mirror with a material unloading structure. It includes a fixed mold, with multiple positioning rods fixedly connected to one side of the fixed mold; an injection port connected to the other side of the fixed mold; a movable mold slidably connected between the positioning rods; a main shaft fixedly connected to one end of the movable mold; first plates symmetrically fixed to both sides of the fixed mold; multiple hard rubber rods installed on both sides of the first plates; and two pairs of connecting rods rotatably connected to one side of the movable mold, with each pair of connecting rods located on both sides of the first plates and corresponding to the hard rubber rods. Through the cooperative action of the connecting rods and the hard rubber rods, the movable mold is subjected to frequent impacts from the balls during reset, thereby demolding and unloading the product inside the movable mold, reducing the operation required for demolding the injection molded part, and also reducing deformation and damage to the product caused by direct ejection.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically an injection mold for automotive rearview mirrors with a material unloading structure. Background Technology

[0002] Car rearview mirrors are devices installed on cars to allow drivers to observe the situation behind and to the sides of the vehicle. They provide drivers with visual information about the surroundings of the vehicle, assist driving operations, and ensure driving safety.

[0003] During the manufacturing process of car rearview mirrors, the mirror housing often involves injection molding. Car rearview mirror housings are usually made of plastic materials such as ABS. These materials have advantages such as high strength, good toughness, and easy processing and molding. After modification, they have outstanding heat resistance and weather resistance, which can ensure stable performance under various environmental conditions.

[0004] In the existing technology, when demolding the product after injection molding of automotive rearview mirror housing, it is generally done by force demolding with ejector pins. However, during use and observation, it was found that this demolding method can lead to excessive stretching of the product surface due to improper ejector pin position or uneven pressure, thereby reducing the processing quality of the product by the device.

[0005] Therefore, a car rearview mirror injection mold with a material unloading structure is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A car rearview mirror injection mold with a material unloading structure, comprising a fixed mold, a plurality of positioning rods fixedly connected to one side of the fixed mold; an injection port connected to the other side of the fixed mold; a moving mold slidably connected between the positioning rods; a main shaft fixedly connected to one end of the moving mold; first plates symmetrically fixedly connected to both sides of the fixed mold; a plurality of hard rubber rods installed on both sides of the first plates; two pairs of connecting rods rotatably connected to one side of the moving mold, each pair of connecting rods located on both sides of the first plates and corresponding to the hard rubber rods; the connecting rods and the moving mold are connected by torsion springs; a ball is fixedly connected to the end of the connecting rod; through the cooperation of the connecting rods and the hard rubber rods, the moving mold is subjected to frequent impacts from the ball during reset, thereby demolding and unloading the product inside the moving mold, reducing the operation required for demolding the injection molded part, and also reducing deformation and damage to the product caused by direct ejection.

[0008] Preferably, a damping spring shock absorber is rotatably connected to the side of the connecting rod away from the ball; the damping spring shock absorber and the moving mold are rotatably connected; by setting the damping spring shock absorber, the connecting rod and the ball can quickly reset and stabilize after striking the moving mold, which facilitates the next squeezing action of the hard rubber rod on the connecting rod and ensures that the ball has sufficient striking effect on the moving mold.

[0009] Preferably, a plurality of buffer rings are fixedly attached to the surface of the moving mold; the surface of the buffer rings is an arc-shaped structure and is correspondingly arranged to the sphere; by setting the buffer rings, the impact point of the sphere on the moving mold can be buffered by the buffer rings, and the buffer rings will reduce the direct contact between the sphere and the moving mold, so as to reduce the marks left on the surface of the moving mold due to excessive impact of the sphere.

[0010] Preferably, a second plate is fixedly connected to one side of the fixed mold; a top plate is provided on one side of the moving mold; a sliding rod is fixedly connected to the inner wall of the top plate, and the sliding rod and the moving mold are through-connected and slidably connected; the top plate and the moving mold are connected by a spring, and the spring is sleeved outside the sliding rod; multiple ejector pins are fixedly connected to the surface of the sliding rod; during the resetting process of the moving mold, the ball will strike the moving mold as the connecting rod rotates. In the latter half of the striking process, the second plate on the surface of the fixed mold will approach and press against the top plate, and the top plate will push the sliding rod to slide along the moving mold. The spring will also be in a compressed state, and the ejector pins will be ejected from the forming groove of the moving mold along with the sliding rod to force the product out of the mold. At this time, due to the striking action of the ball, the bonding area between the product and the moving mold is minimized. It is worth mentioning that when the ejector pins are not ejecting the product, their end faces should be flush with the forming groove inside the moving mold.

[0011] Preferably, a protective sleeve is fixed to the outer wall of the hard rubber rod; the outer wall of the protective sleeve has an arc-shaped structure, and the protective sleeve and the connecting rod are correspondingly arranged; by setting the protective sleeve, the protective sleeve will come into direct contact with the connecting rod, and the contact area between the hard rubber rod and the connecting rod will be reduced, thereby reducing the wear on the surface of the hard rubber rod caused by friction and compression.

[0012] Preferably, the hard rubber rod and the first plate are connected by a thread; by making the first plate and the hard rubber rod a threaded connection, it is convenient to disassemble and replace the hard rubber rod.

[0013] The advantages of this utility model are:

[0014] 1. The automotive rearview mirror injection mold with unloading structure described in this utility model, through the cooperation of the connecting rod and the hard rubber rod, causes the moving mold to be subjected to frequent knocking action by the ball when resetting, thereby demolding and unloading the product in the moving mold, reducing the operation required for demolding the injection molded part, and also reducing the deformation and damage of the product caused by direct ejection.

[0015] 2. The automotive rearview mirror injection mold with unloading structure described in this utility model, by setting a damping spring shock absorber, allows the connecting rod and the ball to quickly reset and stabilize after being struck by the moving mold, facilitating the next pressing action of the hard rubber rod on the connecting rod and ensuring that the ball has sufficient striking force on the moving mold. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main body of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the first plate in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the second plate in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the hard rubber rod in this utility model;

[0021] Figure 5 This is a schematic diagram of the top plate structure in this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the ejector pin in this utility model.

[0023] In the diagram: 1. Fixed mold; 12. Moving mold; 13. Injection port; 14. Positioning rod; 15. Main shaft; 16. First plate; 17. Hard rubber rod; 18. Connecting rod; 19. Ball; 2. Damping spring shock absorber; 3. Buffer ring; 4. Top plate; 42. Slide rod; 44. Ejector pin; 45. Second plate; 5. Sheath. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] Specific implementation examples are given below.

[0026] Please see Figures 1 to 6As shown in the embodiment of this utility model, an injection mold for a car rearview mirror with a material unloading structure includes a fixed mold 1. Multiple positioning rods 14 are fixedly connected to one side of the fixed mold 1. An injection port 13 is connected to the other side of the fixed mold 1. A movable mold 12 is slidably connected between the positioning rods 14. A main shaft 15 is fixedly connected to one end of the movable mold 12. First plates 16 are symmetrically fixed to both sides of the fixed mold 1. Multiple hard rubber rods 17 are installed on both sides of the first plates 16. The movable mold 12 has a... Two pairs of connecting rods 18 are rotatably connected, with each pair of connecting rods 18 located on both sides of the first plate 16 and corresponding to the hard rubber rod 17; the connecting rods 18 and the moving mold 12 are connected by torsion springs; a ball 19 is fixedly attached to the end of each connecting rod 18; the injection port 13 of the fixed mold 1 is connected to the injection nozzle of the injection molding machine and installed on the station of the injection molding machine; the main shaft 15 on one side of the moving mold 12 is connected to the shaft end of the injection molding machine, specifically a radial drive module such as a hydraulic cylinder, which can be pushed by the main shaft 15 during injection molding. The moving mold 12 faces the fixed mold 1. After the moving mold 12 and the fixed mold 1 are fitted together, the injection molding machine can inject material into the mold cavity formed between the fixed mold 1 and the moving mold 12 through the injection port 13. After the workpiece is formed, the moving mold 12 can be pulled back and reset by the spindle 15. During the pulling process of the spindle 15, multiple connecting rods 18 on one side of the moving mold 12 will make multiple contacts with the hard rubber rods 17 on the first plate 16. The connecting rods 18 will rotate the ball 19 under the squeezing action of the hard rubber rods 17 and make the ball 19 rotate against the moving mold 12. A tapping action is performed on one side of the mold 12, causing the product inside the forming groove of the moving mold 12 to detach from the moving mold 12 under repeated vibration, thereby achieving indirect demolding of the product inside the moving mold 12 by the device. Through the cooperation of the connecting rod 18 and the hard rubber rod 17, the moving mold 12 is subjected to frequent tapping action from the ball 19 when it is reset, thereby demolding and unloading the product inside the moving mold 12, reducing the operation required for demolding of the injection molded parts by the device, and also reducing the deformation and damage of the product caused by direct ejection.

[0027] Please see Figure 5 As shown, a damping spring damper 2 is rotatably connected to the side of the connecting rod 18 away from the ball 19; the damping spring damper 2 and the moving mold 12 are rotatably connected; by setting the damping spring damper 2, the connecting rod 18 will drive the damping spring damper 2 to stretch when it rotates. When stretched, the damping spring damper 2 will absorb the kinetic energy of the connecting rod 18 when it rotates under the damping action, so that the connecting rod 18 can quickly return to a parallel and stable posture after hitting the moving mold 12, so that the next time the hard rubber rod 17 squeezes the connecting rod 18, there is sufficient pressure and speed; by setting the damping spring damper 2, the connecting rod 18 and the ball 19 can quickly return to a stable position after hitting the moving mold 12, which facilitates the next squeezing action of the hard rubber rod 17 on the connecting rod 18, and ensures that the ball 19 has sufficient impact on the moving mold 12.

[0028] Please see Figure 5 As shown, multiple buffer rings 3 are fixed to the surface of the moving mold 12; the surface of the buffer ring 3 is an arc-shaped structure and is correspondingly set to the sphere 19; by setting the buffer ring 3, the impact point of the sphere 19 on the moving mold 12 can be buffered by the buffer ring 3, and the buffer ring 3 will reduce the direct contact between the sphere 19 and the moving mold 12, so as to reduce the marks left on the surface of the moving mold 12 due to excessive impact of the sphere 19.

[0029] Please see Figures 3 to 6 As shown, a second plate 45 is fixedly connected to one side of the fixed mold 1; a top plate 4 is provided on one side of the moving mold 12; a sliding rod 42 is fixedly connected to the inner wall of the top plate 4, and the sliding rod 42 and the moving mold 12 are through-connected and slidably connected; the top plate 4 and the moving mold 12 are connected by a spring, and the spring is sleeved on the outside of the sliding rod 42; multiple ejector pins 44 are fixedly connected to the surface of the sliding rod 42; during the resetting process of the moving mold 12, the ball 19 will strike the moving mold 12 as the connecting rod 18 rotates, and in the latter half of the striking process... The second plate 45 on the surface of the fixed mold 1 will approach and press against the top plate 4. The top plate 4 will push the slide bar 42 to slide along the moving mold 12. The spring will also be in a compressed state. The ejector pin 44 will be ejected from the forming groove of the moving mold 12 along with the slide bar 42 to force the product to be ejected and demolded. At this time, due to the impact of the ball 19, the bonding area between the product and the moving mold 12 is minimized. It is worth mentioning that when the ejector pin 44 is not ejecting the product, its end face should be flush with the forming groove in the moving mold 12.

[0030] Please see Figure 4 As shown, a sheath 5 is fixed to the outer wall of the hard rubber rod 17; the outer wall of the sheath 5 has an arc-shaped structure, and the sheath 5 and the connecting rod 18 are correspondingly arranged; by setting the sheath 5, the sheath 5 will come into direct contact with the connecting rod 18, and the contact area between the hard rubber rod 17 and the connecting rod 18 will be reduced, thereby reducing the wear on the surface of the hard rubber rod 17 caused by friction and compression.

[0031] Please see Figure 4 As shown, the hard rubber rod 17 and the first plate 16 are threaded together; by making the first plate 16 and the hard rubber rod 17 threaded together, it is convenient to disassemble and replace the hard rubber rod 17.

[0032] Working principle: The injection port 13 of the fixed mold 1 is connected to the injection nozzle of the injection molding machine and installed on the station of the injection molding machine. The spindle 15 on one side of the moving mold 12 is connected to the shaft end of the injection molding machine. Specifically, it can be a radial drive module such as a hydraulic cylinder. During injection, the spindle 15 can push the moving mold 12 toward the fixed mold 1. After the moving mold 12 and the fixed mold 1 are in contact, the injection molding machine can inject material into the mold cavity formed between the fixed mold 1 and the moving mold 12 through the injection port 13. After the workpiece is formed, the spindle 15 can pull back and reset the moving mold 12. During the pulling process of the spindle 15, multiple connecting rods 18 on one side of the moving mold 12 will make multiple contacts with the hard rubber rods 17 on the first plate 16. The connecting rod 18, carrying the ball 19, rotates under the pressure of the hard rubber rod 17, causing the ball 19 to strike one side of the moving mold 12. This causes the product in the forming groove of the moving mold 12 to detach from the moving mold 12 under repeated vibration, thus achieving indirect demolding of the product in the moving mold 12. By setting a damping spring damper 2, the rotation of the connecting rod 18 drives the damping spring damper 2 to stretch. When stretched, the damping spring damper 2 absorbs the kinetic energy of the connecting rod 18 during rotation under damping action, so that the connecting rod 18 can quickly return to a parallel and stable posture after striking the moving mold 12, so that when the hard rubber rod 17 squeezes the connecting rod 18 again... It has sufficient pressure and speed; by setting a buffer ring 3, the impact point of the ball 19 on the moving mold 12 can be buffered by the buffer ring 3. The buffer ring 3 will reduce the direct contact between the ball 19 and the moving mold 12, so as to reduce the marks left on the surface of the moving mold 12 due to excessive impact from the ball 19; during the resetting process of the moving mold 12, the ball 19 will impact the moving mold 12 as the connecting rod 18 rotates. In the latter half of the stroke of the impact process, the second plate 45 on the surface of the fixed mold 1 will approach and press the top plate 4, and the top plate 4 will push the slide rod 42 to slide along the moving mold 12. The spring will also be in a compressed state, and the ejector pin 44 will move along with the spring. The slide bar 42 is ejected from the forming groove of the moving mold 12 to force the product out of the mold. At this time, due to the impact of the ball 19, the bonding area between the product and the moving mold 12 is minimized. It is worth mentioning that when the ejector pin 44 is not ejecting the product, its end face should be flush with the forming groove in the moving mold 12. By setting the sleeve 5, the sleeve 5 will have direct contact with the connecting rod 18, and the contact area between the hard rubber rod 17 and the connecting rod 18 will be reduced, thereby reducing the wear on the surface of the hard rubber rod 17 caused by friction and extrusion. By setting the first plate 16 and the hard rubber rod 17 as a threaded connection, it is easy to disassemble and replace the hard rubber rod 17.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An injection mold for an automotive rearview mirror with a discharge structure, comprising a fixed mold (1), wherein a plurality of positioning rods (14) are fixedly connected to one side of the fixed mold (1); an injection port (13) is connected to the other side of the fixed mold (1); a movable mold (12) is slidably connected between the positioning rods (14); and a main shaft (15) is fixedly connected to one end of the movable mold (12); characterized in that: The fixed mold (1) is symmetrically fixed with a first plate (16) on both sides; a plurality of hard rubber rods (17) are installed on both sides of the first plate (16); two pairs of connecting rods (18) are rotatably connected to one side of the moving mold (12), and each pair of connecting rods (18) is located on both sides of the first plate (16) and is correspondingly set with the hard rubber rods (17); the connecting rods (18) and the moving mold (12) are connected by a torsion spring; a ball (19) is fixed to the end of the connecting rod (18).

2. The automotive rearview mirror injection mold with a discharge structure according to claim 1, characterized in that: The connecting rod (18) is rotatably connected to a damping spring shock absorber (2) on the side away from the sphere (19); the damping spring shock absorber (2) and the moving mold (12) are both rotatably connected.

3. The injection mold for an automotive rearview mirror with a discharge structure according to claim 2, characterized in that: Multiple buffer rings (3) are fixed to the surface of the moving mold (12); the surface of the buffer ring (3) is an arc-shaped structure and is set in correspondence with the sphere (19).

4. The automotive rearview mirror injection mold with a discharge structure according to claim 3, characterized in that: A second plate (45) is fixedly connected to one side of the fixed mold (1); a top plate (4) is provided on one side of the moving mold (12); a slide rod (42) is fixedly connected to the inner wall of the top plate (4), and the slide rod (42) and the moving mold (12) are connected through and slidably connected; the top plate (4) and the moving mold (12) are connected by a spring, and the spring is sleeved on the outside of the slide rod (42); a plurality of ejector pins (44) are fixedly connected to the surface of the slide rod (42).

5. The automotive rearview mirror injection mold with a discharge structure according to claim 4, characterized in that: The outer wall of the hard rubber rod (17) is fixed with a sheath (5); the outer wall of the sheath (5) is an arc-shaped structure, and the sheath (5) and the connecting rod (18) are correspondingly set.

6. The injection mold for an automotive rearview mirror with a discharge structure according to claim 5, characterized in that: The hard rubber rod (17) and the first plate (16) are threaded together.

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