Injection mold with high-hardness wear-resistant coating

Abstract

The utility model discloses an injection mold with a high-hardness wear-resistant coating, which relates to the technical field of injection molds and comprises a front mold frame and a rear mold frame, a front mold groove is formed in one end, close to the rear mold frame, of the front mold frame, and a rear mold groove matched with the front mold groove is formed in one end, close to the front mold frame, of the rear mold frame. A movable groove transversely penetrating through the rear mold frame is formed in the side wall of the rear mold frame, a movable plate is arranged in the movable groove, a plurality of ejector pins are fixedly installed at the upper end of the movable plate, the upper ends of the ejector pins penetrate through the rear mold frame in a sliding mode and extend to the position above the rear mold groove, and automatic control mechanisms acting on the ejector pins are arranged on the front mold frame and the rear mold frame. Through the unique structural design, automatic operation of the ejector pin can be realized, the ejector pin automatically shrinks during mold closing, so that the top end of the ejector pin is aligned with the outer surface of the forming groove, and the ejector pin automatically ejects during mold opening, so that the demolding work of a formed part is automatically realized.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with a high-hardness wear-resistant coating. Background Technology

[0002] Injection molding, as an efficient plastic product manufacturing process, occupies an important position in the plastic processing industry. This technology involves injecting molten plastic into a closed mold, allowing it to cool and solidify before opening the mold and removing the product. Injection molding is widely used in many fields such as automobiles, electronics, and medical devices due to its high production speed, high degree of automation, and ability to produce products with complex shapes.

[0003] Injection molds require ejector pins to demold the molded parts. However, existing injection mold ejector pins require the electric telescopic rod of the injection molding machine to push the ejector plate, thus driving the ejector pin movement. This makes automatic operation of the ejector pins impossible, resulting in low automation. Therefore, an injection mold with a high-hardness, wear-resistant coating is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an injection mold with a high-hardness, wear-resistant coating to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection mold with a high-hardness wear-resistant coating, comprising a front mold base and a rear mold base. The front mold base has a front mold groove at one end near the rear mold base, and the rear mold base has a rear mold groove adapted to the front mold groove at one end near the front mold base. A movable groove is provided on the side wall of the rear mold base, and a movable plate is provided in the movable groove. A plurality of ejector pins are fixedly installed on the upper end of the movable plate. The upper ends of the ejector pins slide through the rear mold base and extend above the rear mold groove. An automatic control mechanism acting on the ejector pins is provided on the front mold base and the rear mold base. The automatic control mechanism consists of a return spring, a pressure rod, and a mating rod.

[0006] As a further preferred embodiment of this technical solution, the end of the front mold frame away from the rear mold frame is provided with an injection port that communicates with the front mold groove.

[0007] As a further preferred embodiment of this technical solution, four return springs are fixedly connected between the bottom of the movable plate and the bottom of the movable groove. Four mating rods are fixedly installed on the upper end of the movable plate. Four through holes extending to the movable groove are opened on the upper surface of the rear mold frame. The through holes slide and engage with the mating rods. The four through holes correspond one-to-one with the four mating rods. Pressure rods are fixedly installed at the bottom of the front mold frame at the extension positions of the four through holes. The pressure rods slide and engage with the through holes.

[0008] As a further preferred of the technical solution, the inner part of the four reset springs is respectively provided with a guide rod, the four guide rods are respectively slidably penetrated through the movable plate, and the upper and lower ends of the guide rod are respectively fixedly connected to the upper and lower inner walls of the movable groove.

[0009] As a further preferred of the technical solution, the length of the ejector pin extending out of the rear mold groove is equal to the sum of the length of the pressing rod and the matching rod minus the depth of the through hole.

[0010] As a further preferred of the technical solution, the bottom of the front mold frame is fixedly provided with four positioning columns, and the upper surface of the rear mold frame is provided with four positioning holes.

[0011] As a further preferred of the technical solution, the positioning hole and the positioning column are slidably matched, and the four positioning columns are respectively one-to-one corresponding to the four positioning holes.

[0012] The utility model provides a kind of injection mold with high-hardness wear-resistant coating, with the following beneficial effects:

[0013] The utility model discloses a kind of injection mold with high-hardness wear-resistant coating, with the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the schematic diagram of the overall structure of the utility model;

[0015] Fig. 2 It is the schematic diagram of the overall structure of the utility model;

[0016] Fig. 3 It is the schematic diagram of the overall structure of the utility model;

[0017] Fig. 4 It is the schematic diagram of the overall structure of the utility model;

[0018] In the drawing: 1, front mold frame;2, rear mold frame;3, movable groove;4, reset spring;5, movable plate;6, through hole;7, pressing rod;8, positioning hole;9, positioning column;10, injection port;11, rear mold groove;12, front mold groove;13, guide rod;14, matching rod;15, ejector pin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0020] The utility model provides technical scheme: as Figs. 1 to 4As shown in the embodiment, the injection mold with high-hardness wear-resistant coating comprises a front mold frame 1 and a rear mold frame 2, the front mold frame 1 is provided with a front mold groove 12 at one end close to the rear mold frame 2, the rear mold frame 2 is provided with a rear mold groove 11 at one end close to the front mold frame 1, the front mold frame 1 is provided with an injection port 10 at one end away from the rear mold frame 2, the rear mold frame 2 is provided with a movable slot 3 across the rear mold frame 2, the movable slot 3 is provided with a movable plate 5, the movable plate 5 is provided with a plurality of ejector pins 15, the upper end of the ejector pin 15 is slidably penetrated through the rear mold frame 2 and extends above the rear mold groove 11, the front mold frame 1 and the rear mold frame 2 are provided with an automatic control mechanism acting on the ejector pin 15, the automatic control mechanism comprises a reset spring 4, a pressing rod 7 and a matching rod 14.

[0021] The outer surfaces of the front mold frame 1 and the rear mold frame 2 are coated with high-hardness wear-resistant coating to prolong the service life of the injection mold.

[0022] The bottom of the movable plate 5 is fixedly connected with the bottom of the movable slot 3 through four reset springs 4, the upper end of the movable plate 5 is fixedly provided with four matching rods 14, the upper surface of the rear mold frame 2 is provided with four through holes 6 extending into the movable slot 3, the through hole 6 is slidably matched with the matching rod 14, the four through holes 6 are respectively and correspondingly matched with the four matching rods 14, the bottom of the front mold frame 1 is fixedly provided with the pressing rod 7 at the extension position of the four through holes 6, and the pressing rod 7 is slidably matched with the through hole 6.

[0023] The inner part of the reset spring 4 is provided with a guide rod 13, the guide rod 13 is slidably penetrated through the movable plate 5, and the upper and lower ends of the guide rod 13 are fixedly connected to the upper and lower inner walls of the movable slot 3.

[0024] The guide rod 13 can make the movable plate 5 move more stably.

[0025] The length of the ejector pin 15 extending out of the rear mold groove 11 is equal to the sum of the lengths of the pressing rod 7 and the matching rod 14 minus the depth of the through hole 6.

[0026] In this way, when the front mold frame 1 and the rear mold frame 2 are closed, the length of the bottom of the matching rod 14 extending into the movable slot 3 is just equal to the sum of the lengths of the pressing rod 7 and the matching rod 14 minus the depth of the through hole 6, and the length of the bottom of the matching rod 14 extending into the movable slot 3 is just equal to the height of the movable plate 5 descending, and when the height of the movable plate 5 moving downward is equal to the length of the ejector pin 15 extending out of the rear mold groove 11, it means that the top end of the ejector pin 15 is just aligned with the outer surface of the rear mold groove 11 after the front mold frame 1 and the rear mold frame 2 are closed, thereby avoiding the influence of the fixed ejector pin 15 on the shape of the molded part.

[0027] The bottom of the front mold frame 1 is fixedly provided with four positioning columns 9, and the upper surface of the rear mold frame 2 is provided with four positioning holes 8, the positioning holes 8 and the positioning columns 9 are in sliding fit, and the four positioning columns 9 correspond to the four positioning holes 8 one by one.

[0028] When the front mold frame 1 and the rear mold frame 2 are closed, the front mold groove 12 and the rear mold groove 11 can be more accurately aligned through the positioning columns 9 and the positioning holes 8.

[0029] The utility model provides a kind of injection mold with high-hardness wear-resistant coating, specific working principle as follows:

[0030] Use makes, the front mold frame 1 and the rear mold frame 2 are respectively installed on the injection end and the driving end of injection molding machine, the opening and closing of the front mold frame 1 and the rear mold frame 2 can be controlled by driving end, when the front mold frame 1 and the rear mold frame 2 are closed, the compression rod 7 on the front mold frame 1 will be inserted into through hole 6, and the matching rod 14 and movable plate 5 are extruded, at this time, movable plate 5 will drive ejector pin 15 to move downwards, reset spring 4 will be extruded, after the front mold frame 1 and the rear mold frame 2 are completely closed, the top end of ejector pin 15 is just aligned with the outer surface of rear mold groove 11, so as to avoid that the appearance of the molded part is affected by fixed ejector pin 15, then injection molding machine guides liquid plastic into molding groove by injection port 10, when the molded part is formed, the rear mold frame 2 is separated from the front mold frame 1 by the driving end of injection molding machine, at this time, the compression rod 7 will also be away from through hole 6, and the matching rod 14 and movable plate 5 lose the extrusion of compression rod 7, under the action that reset spring 4 restores deformation, it will be moved upwards to contact the top wall of movable groove 3, and drive ejector pin 15 to eject the molded part in molding groove, so as to automatically complete the ejection work of molded part.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments 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 mould with a high-hardness wear-resistant coating, comprising a front mould frame (1) and a back mould frame (2), characterised in that: The front mold frame (1) is provided with a front mold groove (12) near one end of the rear mold frame (2), the rear mold frame (2) is provided with a rear mold groove (11) near one end of the front mold frame (1), the rear mold frame (2) is provided with a movable slot (3) across the rear mold frame (2), the movable slot (3) is provided with a movable plate (5), the movable plate (5) is provided with a plurality of ejector pins (15), the ejector pins (15) are slidably connected to the rear mold frame (2) and extend above the rear mold groove (11), the front mold frame (1) and the rear mold frame (2) are provided with an automatic control mechanism for the ejector pins (15), the automatic control mechanism comprises a reset spring (4), a pressure rod (7) and a matching rod (14).

2. An injection mold having a high hardness wear resistant coating according to claim 1, characterized in that: The front mold frame (1) is provided with an injection port (10) connected to the front mold groove (12) away from the rear mold frame (2).

3. An injection mold having a high hardness wear resistant coating according to claim 1, characterized in that: The bottom of the movable plate (5) is fixedly connected to the bottom of the movable slot (3), the movable plate (5) is provided with four matching rods (14), the upper surface of the rear mold frame (2) is provided with four through holes (6) extending into the movable slot (3), the through holes (6) are slidably connected to the matching rods (14), the four through holes (6) are correspondingly connected to the four matching rods (14), the bottom of the front mold frame (1) is provided with a pressure rod (7) at the extension position of the four through holes (6), and the pressure rod (7) is slidably connected to the through hole (6).

4. An injection mold having a high hardness wear resistant coating according to claim 3, characterized in that: The four reset springs (4) are respectively provided with guide rods (13), the four guide rods (13) are slidably connected to the movable plate (5), and the upper and lower ends of the guide rods (13) are fixedly connected to the upper and lower inner walls of the movable slot (3).

5. An injection mold having a high hardness wear resistant coating according to claim 1, characterized in that: The length of the ejector pins (15) extending out of the rear mold groove (11) is equal to the sum of the lengths of the pressure rod (7) and the matching rod (14) minus the depth of the through hole (6).

6. An injection mold having a high hardness wear resistant coating according to claim 1, characterized in that: The bottom of the front mold frame (1) is provided with four positioning columns (9), and the upper surface of the rear mold frame (2) is provided with four positioning holes (8).

7. An injection mold having a high hardness wear resistant coating according to claim 6, characterized in that: The positioning holes (8) are slidably connected to the positioning columns (9), and the four positioning columns (9) are correspondingly connected to the four positioning holes (8).

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