Injection mold with auxiliary reset mechanism
By designing a combined structure of reset push rod and elastic reset part in the injection mold, the problem of elastic fatigue of traditional mold reset parts is solved, and the accurate reset of the ejection panel and the ejection pin is achieved, and the service life of the mold is extended.
Patent Information
- Application Number
- CN202422147661.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The reset parts of traditional injection molds are prone to elastic fatigue, resulting in inadequate resetting of the ejection panel and ejection needle, affecting the normal use of the mold.
An injection mold with an auxiliary reset mechanism is designed, and a combined structure of a reset push rod and an elastic reset member is adopted. The lifting push rod is used to push the ejection panel to move and reset, and the resilient reset member is used to achieve reset under the drive of the ejection panel and the rear mold assembly.
It effectively solves the problem of elastic fatigue of traditional mold reset parts, ensures accurate reset of the ejection panel and thimble, extends the service life of the mold, and ensures the normal progress of the subsequent injection molding process.
Smart Images
Figure CN222959085U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, and particularly relates to an injection mold with an auxiliary reset mechanism. Background Art
[0002] Injection molding technology is one of the widely used industrial production technologies at present. For example, various products with irregular shapes are produced through injection molds. The injection mold cavities of the molds are designed according to the shapes of the products, and plastic materials are injected into the injection mold cavities for molding, and the products are obtained after demolding. Existing injection molds generally have one or several injection runners. During injection, the plastic materials enter the injection mold cavities through the injection runners for injection molding.
[0003] In order to facilitate the removal of the injection molded parts after the injection molds form the injection molded parts, a movable ejector plate and ejector pins are generally arranged in the injection molds. After the ejector plate and the ejector pins eject the formed injection molded parts from the injection mold cavities, they need to be reset for the next use. The traditional reset parts are springs. After long-term use, the springs are prone to elastic fatigue, resulting in the incomplete reset of the ejector plate and the ejector pins, which affects the normal use of the subsequent injection molds. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the deficiencies existing in the above-mentioned prior art, and to provide an injection mold with an auxiliary reset mechanism added to assist the ejector plate in resetting in place.
[0005] The purpose of the utility model is realized as follows:
[0006] An injection mold with an auxiliary reset mechanism includes a front mold assembly and a rear mold assembly. An injection mold cavity is arranged on the rear mold assembly. A first spring and a movable ejector plate are arranged on the rear mold assembly. Two ends of the first spring are respectively abutted against the ejector plate and the rear mold assembly. Ejector pins are arranged on the ejector plate, and one ends of the ejector pins extend to the bottom surface of the injection mold cavity. The ejector plate is also provided with an elastic reset member. One end of the elastic reset member is abutted against the rear mold assembly. The elastic reset member is also provided with a reset through hole. A reset push rod is arranged on the front mold assembly. One end of the reset push rod is inserted into the rear mold assembly, and one end of the reset push rod extends into the reset through hole. For this injection mold with an auxiliary reset mechanism, when the front mold assembly and the rear mold assembly are closed, the reset push rod can push the ejector plate to move and reset. During this process, the elastic reset member also moves and resets under the drive of the ejector plate and the abutting cooperation with the rear mold assembly until the elastic reset member is reset in place and the reset push rod extends into the reset through hole of the elastic reset member, realizing the reset in place of the ejector plate, which is beneficial to the normal use of the subsequent injection molds. The auxiliary reset mechanism composed of the reset push rod and the elastic reset member has a simple structure and good implementation effect.
[0007] The object of the present utility model can also be solved by the following technical measures:
[0008] Specifically, the elastic reset member includes a reset plate and a second spring. An installation groove is formed in the ejection panel. The reset plate and the second spring are both placed on the installation groove, and both ends of the second spring are respectively abutted against the reset plate and the installation groove. One end of the reset plate abuts against the rear mold assembly. A reset through hole is formed in the reset plate. An insertion port is formed in the ejection panel corresponding to the position of the reset through hole. One end of the reset push rod passes through the insertion port and extends into the reset through hole. The installation groove provides a stable installation and movement space for the reset plate. At the same time, the structures of the reset plate and the second spring are simple and can well achieve the purpose of this patent.
[0009] Specifically, a first inclined surface is provided at one end of the reset plate. A limit block is fixed on the rear mold assembly. A second inclined surface is provided on the limit block. The first inclined surface and the second inclined surface are abutted against each other. The cooperation effect of the first inclined surface and the second inclined surface is good to realize the smooth movement of the reset plate on the installation groove.
[0010] Specifically, the rear mold assembly includes a bottom plate, an ejection panel, a backing plate and a molding plate. The ejection panel is placed on the bottom plate, and square irons are provided on both sides of the ejection panel. The backing plate is placed on the two square irons, and there is a gap for the ejection panel to move between the top surface of the ejection panel and the bottom surface of the backing plate. Both ends of the first spring are respectively abutted against the top surface of the ejection panel and the bottom surface of the backing plate. The molding plate is placed on the backing plate, and an injection mold cavity is provided on the molding plate. A driving through hole and the limit block are provided on the bottom plate. An external power source can pass through the driving through hole on the bottom plate to drive the ejection panel, so as to realize the movement of the ejection panel on the gap. At the same time, the square irons located on both sides of the ejection panel can also play a certain protective role for the ejection panel, which is beneficial to the stable operation of the ejection panel.
[0011] Specifically, an insertion portion extends from one end of the limit block. A second inclined surface is provided at the other end of the limit block. An insertion groove is formed in the bottom plate, and a through hole is formed at the bottom of the insertion groove. The insertion portion is inserted into the insertion groove. One end of a connecting screw passes through the through hole and extends into the insertion groove to be threadedly connected with the insertion portion. To realize the detachable installation of the limit block on the bottom plate, and the installation and disassembly operation of the limit block is relatively simple and convenient. At the same time, it is also convenient for users to replace the corresponding limit block according to the reset plate of different sizes.
[0012] Specifically, a limit through hole is formed in the ejection panel corresponding to the position of the limit block. The limit through hole is communicated with the installation groove. When the ejection panel moves and resets, the limit through hole can play a good limiting role on the limit block, which is beneficial to the stable cooperation between the limit block and the elastic reset member on the installation groove.
[0013] Specifically further, the insertion opening is a tapered opening that is wider at the top and narrower at the bottom; this facilitates the reset push rod to pass through the insertion opening and extend into the reset through hole of the reset plate.
[0014] Specifically further, it further includes a guide plate. The guide plate is connected to the side walls of the backing plate and the molding plate, and a guide through hole is provided on the guide plate. One side of the ejector panel is further provided with a guide post, and one end of the guide post extends into the guide through hole; the cooperation between the guide post and the guide through hole plays a good guiding and resetting role in the movement of the ejector panel, and its implementation effect is good.
[0015] The beneficial effects of the present utility model are as follows:
[0016] (1) For this injection mold with an auxiliary reset mechanism, when the front mold assembly and the rear mold assembly are closed, the reset push rod can push the ejector panel to move and reset. During this process, the elastic reset member also moves and resets under the drive of the ejector panel and in the abutting cooperation with the rear mold assembly until the elastic reset member is reset in place and the reset push rod extends into the reset through hole of the elastic reset member, realizing the reset in place of the ejector panel, which is beneficial to the normal use of the subsequent injection mold; the auxiliary reset mechanism composed of the reset push rod and the elastic reset member has a simple structure and a good implementation effect.
[0017] (2) The cooperation effect of the first inclined surface and the second inclined surface is good to realize the smooth movement of the reset plate on the placement groove.
[0018] (3) The cooperation between the guide post and the guide through hole plays a good guiding and resetting role in the movement of the ejector panel, and its implementation effect is good. Description of the Drawings
[0019] Figure 1 It is a schematic diagram of the injection mold with an auxiliary reset mechanism of the present utility model.
[0020] Figure 2 It is the first sectional view of the injection mold with an auxiliary reset mechanism of the present utility model.
[0021] Figure 3 It is the second sectional view of the injection mold with an auxiliary reset mechanism of the present utility model.
[0022] Figure 4 It is Figure 3 the enlarged view of A in
[0023] Figure 5 It is the second sectional view of the injection mold with an auxiliary reset mechanism of the present utility model.
[0024] Figure 6 It is the three-dimensional view of the rear mold assembly of the present utility model.
[0025] Figure 7 It is the three-dimensional view of the front mold assembly of the present utility model. Detailed implementation mode
[0026] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:
[0027] Embodiment, in combination with Figures 1 to 7 As shown, an injection mold with an auxiliary reset mechanism includes a front mold assembly 1 and a rear mold assembly 2. An injection mold cavity 21 is provided on the rear mold assembly 2. A first spring 3 and a movable ejector panel 4 are provided on the rear mold assembly 2. Both ends of the first spring 3 are abutted against the ejector panel 4 and the rear mold assembly 2 respectively. An ejector pin 41 is provided on the ejector panel 4 and one end of the ejector pin 41 extends to the bottom surface of the injection mold cavity 21. Its characteristic is that an elastic reset member 5 is further provided on the ejector panel 4. One end of the elastic reset member 5 is abutted against the rear mold assembly 2. The elastic reset member 5 is also provided with a reset through hole 51. A reset push rod 11 is provided on the front mold assembly 1. One end of the reset push rod 11 is inserted into the rear mold assembly 2 and one end of the reset push rod 11 extends into the reset through hole 51.
[0028] As a specific solution, the elastic reset member 5 includes a reset plate 52 and a second spring 53. An accommodation groove 42 is formed in the ejector panel 4. The reset plate 52 and the second spring 53 are both placed on the accommodation groove 42 and both ends of the second spring 53 are abutted against the reset plate 52 and the accommodation groove 42 respectively. One end of the reset plate 52 is abutted against the rear mold assembly 2. The reset through hole 51 is formed on the reset plate 52. An insertion port 43 is formed on the ejector panel 4 corresponding to the position of the reset through hole 51. One end of the reset push rod 11 passes through the insertion port 43 and then extends into the reset through hole 51.
[0029] In this embodiment, a first inclined surface 521 is provided at one end of the reset plate 52. A limit block 22 is fixed on the rear mold assembly 2. A second inclined surface 221 is provided on the limit block 22. The first inclined surface 521 and the second inclined surface 221 are abutted against each other.
[0030] As a more specific solution, the rear mold assembly 2 includes a bottom plate 6, an ejector panel 4, a backing plate 7 and a forming plate 8. The ejector panel 4 is placed on the bottom plate 6 and square irons 9 are provided on both sides of the ejector panel 4. The backing plate 7 is placed on the two square irons 9 and a gap 100 for the movement of the ejector panel 4 is provided between the top surface of the ejector panel 4 and the bottom surface of the backing plate 7. Both ends of the first spring 3 are abutted against the top surface of the ejector panel 4 and the bottom surface of the backing plate 7 respectively. The forming plate 8 is placed on the backing plate 7 and the injection mold cavity 21 is provided on the forming plate 8. A driving through hole 61 and the limit block 22 are provided on the bottom plate 6.
[0031] In this embodiment, an insertion portion 222 extends from one end of the limiting block 22, and a second inclined surface 221 is provided at the other end of the limiting block 22. An insertion groove 62 is formed on the bottom plate 6, and a through hole 63 is formed at the bottom of the insertion groove 62. The insertion portion 222 is inserted into the insertion groove 62, and one end of a connecting screw 200 passes through the through hole 63 and extends into the insertion groove 62 to be threadedly connected with the insertion portion 222.
[0032] In this embodiment, a limiting through hole 44 is formed on the ejector panel 4 corresponding to the position of the limiting block 22, and the limiting through hole 44 communicates with the placement groove 42.
[0033] As a better implementation scheme, the insertion port 43 is a tapered port with a wider upper part and a narrower lower part.
[0034] As a better implementation scheme, it further includes a guide plate 71. The guide plate 71 is connected to the side walls of the backing plate 7 and the forming plate 8, and a guide through hole 72 is formed on the guide plate 71. A guide post 45 is further provided on one side of the ejector panel 4, and one end of the guide post 45 extends into the guide through hole 72.
[0035] Working principle: When the mold is opened, the rear mold assembly 2 can move and open relative to the front mold assembly 1. Then, an external power source pushes the ejector panel 4 and the ejector pins 41 thereon to move, ejecting the injection-molded workpiece out of the injection mold cavity 21. After the external power source is withdrawn, the ejector panel 4 and the ejector pins 41 thereon can be reset under the action of the first spring 3.
[0036] When the mold is closed, the rear mold assembly 2 can move and close relative to the front mold assembly 1. During this process, if the ejector panel 4 is not reset in place, the reset push rod 11 can push the ejector panel 4 to move and reset. At the same time, the elastic reset member 5 also moves and resets under the drive of the ejector panel 4 and the abutting cooperation of the rear mold assembly 2 until the elastic reset member 5 is reset in place and the reset push rod 11 extends into the reset through hole 51 of the elastic reset member 5. At this time, the ejector panel 4 is reset in place.
Claims
1. An injection mold with an auxiliary reset mechanism, comprising a front mold component (1) and a rear mold component (2), wherein the rear mold component (2) is provided with an injection mold cavity (21), the rear mold component (2) is provided with a first spring (3) and a movable ejection panel (4), the first spring (3) having two ends respectively abutting against the ejection panel (4) and the rear mold component (2), the ejection panel (4) being provided with an ejector pin (41) and one end of the ejector pin (41) extending to the bottom surface of the injection mold cavity (21), wherein: The ejection panel (4) is also provided with an elastic reset member (5), one end of which abuts against the rear mold assembly (2), and the elastic reset member (5) is also provided with a reset through hole (51). The front mold assembly (1) is provided with a reset push rod (11), one end of which is inserted into the rear mold assembly (2) and one end of which extends into the reset through hole (51).
2. The injection mold with auxiliary reset mechanism according to claim 1, characterized in that: The elastic reset member (5) comprises a reset plate (52) and a second spring (53). A placement groove (42) is formed in the ejection panel (4). The reset plate (52) and the second spring (53) are both placed on the placement groove (42), and two ends of the second spring (53) respectively abut against the reset plate (52) and the placement groove (42). One end of the reset plate (52) abuts against the rear mold assembly (2). The reset plate (52) is formed with the reset through hole (51). An insertion opening (43) is formed on the ejection panel (4) at a position corresponding to the reset through hole (51). One end of the reset push rod (11) passes through the insertion opening (43) and extends into the reset through hole (51).
3. The injection mold with auxiliary reset mechanism according to claim 2, characterized in that: A first inclined surface (521) is provided at one end of the reset plate (52), a limiting block (22) is fixed on the rear mold assembly (2), a second inclined surface (221) is provided on the limiting block (22), and the first inclined surface (521) and the second inclined surface (221) are abutted against each other.
4. The injection mold with auxiliary reset mechanism according to claim 3, characterized in that: The rear mold assembly (2) comprises a bottom plate (6), an ejection panel (4), a pad (7) and a molding plate (8); the ejection panel (4) is placed on the bottom plate (6) and square irons (9) are provided on both sides of the ejection panel (4); the pad (7) is placed on two square irons (9) and a gap (100) is provided between the top surface of the ejection panel (4) and the bottom surface of the pad (7) for the ejection panel (4) to move; the two ends of the first spring (3) are respectively in contact with the top surface of the ejection panel (4) and the bottom surface of the pad (7); the molding plate (8) is placed on the pad (7) and the molding plate (8) is provided with the injection mold cavity (21); and the bottom plate (6) is provided with a driving through hole (61) and the limit block (22).
5. The injection mold with auxiliary reset mechanism according to claim 4, characterized in that: An inserting portion (222) extends from one end of the limit block (22), and the second inclined surface (221) is provided at the other end of the limit block (22). An inserting slot (62) is provided on the bottom plate (6), and a through hole (63) is provided at the bottom of the inserting slot (62). The inserting portion (222) is inserted into the inserting slot (62), and one end of a connecting screw (200) passes through the through hole (63) and extends into the inserting slot (62) to be threadedly connected with the inserting portion (222).
6. The injection mold with auxiliary reset mechanism according to claim 5, characterized in that: A limiting through hole (44) is formed on the ejection panel (4) at a position corresponding to the limiting block (22), and the limiting through hole (44) is in communication with the placement groove (42).
7. The injection mold with auxiliary reset mechanism according to claim 2, characterized in that: The insertion opening (43) is a tapered opening that is wider at the top and narrower at the bottom.
8. The injection mold with auxiliary reset mechanism according to claim 4, characterized in that: The ejection panel (4) further comprises a guide plate (71), the guide plate (71) being connected to the side walls of the backing plate (7) and the forming plate (8), and having a guide through hole (72) formed therein. A guide column (45) is also provided on one side of the ejection panel (4), and one end of the guide column (45) extends into the guide through hole (72).