Mechanical front mold ejection structure

Abstract

The utility model relates to the technical field of molds, and discloses a mechanical front mold ejection structure which comprises an ejection assembly and an ejection assembly, the ejection assembly comprises a pull rod, the ejection assembly comprises an elastic piece and an ejection block, a first chamfer is arranged at the top end of the pull rod, a hook groove is formed below the first chamfer, and the ejection block is arranged below the hook groove. A first chamfer is arranged on one side of the hook groove, a second chamfer is arranged on one side, far away from the first chamfer, of the hook groove, the bottom ends of the pull rods are mounted on two sides of the rear mold, one end of the elastic piece is propped against one end of the guide groove of the front mold, the other end of the elastic piece is propped against one end of the pop-up block, and a fourth chamfer is arranged at the other end of the pop-up block. The first chamfer, the second chamfer and the fourth chamfer are parallel to one another, and the pop-up block can be embedded into the hook groove. According to the utility model, the structure of the mold is simplified, the mold cost is reduced, faults are not easy to occur, the service life is prolonged, the operation and maintenance are convenient, and the injection molding production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mechanical front mold ejection structure. Background Art

[0002] An injection mold usually consists of two parts: a front mold and a rear mold. The rear mold is installed on the moving template of an injection molding machine, and the front mold is installed on the fixed template of the injection molding machine. When injection molding, the front mold and the rear mold are closed to form a gating system and a cavity. When the mold is opened, the front mold and the rear mold are separated to take out the plastic product. For automotive interior parts, an inverted injection mold is usually required. Since there are undercuts or ribs on the front mold of the injection product, in order to avoid the phenomenon of inability to eject the mold or sticking to the front mold, a method of ejecting the front mold needs to be designed. Generally, a mechanism such as an oil cylinder needs to be designed as the ejection drive for the front mold ejection, resulting in complex mold structure, high mold cost, short service life, inconvenient operation, maintenance, transportation and installation, slow oil cylinder action and low production efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a mechanical front mold ejection structure.

[0004] The purpose of the utility model is achieved by the following technical solutions: A mechanical front mold ejection structure includes an ejection assembly and a pop-up assembly. The ejection assembly includes a pull rod. The pop-up assembly includes an elastic member and a pop-up block. The top end of the pull rod is provided with a first chamfer. A hook groove is provided below the first chamfer. A second chamfer is provided on one side of the hook groove away from the first chamfer. The bottom end of the pull rod is installed on both sides of the rear mold. One end of the elastic member abuts against one end of the guide groove of the front mold, and the other end of the elastic member abuts against one end of the pop-up block. A fourth chamfer is provided at the other end of the pop-up block. The first chamfer, the second chamfer and the fourth chamfer are parallel to each other. The pop-up block can be embedded in the hook groove.

[0005] More preferably, it further includes a guide block. The rear mold includes a second intermediate plate and a lower plate. The guide block is installed on both sides of the second intermediate plate. The pull rod is provided with a strip-shaped through groove. The guide block is located in the strip-shaped through groove. The pull rod can slide relative to the guide block.

[0006] More preferably, it further includes a second bolt. The guide block is installed on the second intermediate plate through the second bolt.

[0007] More preferably, the guide block is provided with a third chamfer, and the third chamfer is parallel to the fourth chamfer.

[0008] A better choice is that the ejecting block includes a sliding part and a limiting part. The limiting parts are respectively connected to both sides of the sliding part. The fourth chamfer is arranged at one end of the sliding part far from the elastic part. Both the sliding part and the limiting part match the guiding groove.

[0009] A better choice is that it further includes a first bolt, and the pull rod is installed on the lower plate through the first bolt.

[0010] A better choice is that the elastic part is a spring.

[0011] A better choice is that the number of the ejecting structures is two.

[0012] A better choice is that the ejecting structures are symmetrically arranged.

[0013] A better choice is that the front mold includes an upper plate and a first intermediate plate. The first intermediate plate is provided with a guiding groove, and the upper plate covers the top of the first intermediate plate to form the guiding groove.

[0014] The utility model has the following advantages and beneficial effects compared with the prior art:

[0015] Through the pull rod, the elastic part and the ejecting block, the utility model simplifies the structure of the mold, reduces the cost of the mold compared with driving mechanisms such as oil cylinders. Moreover, due to the simple structure of the mechanical front mold ejecting structure, it is not easy to malfunction, prolongs the service life, and components can be replaced in time according to the wear degree of mechanical components during use, making operation and maintenance convenient. Since the oil cylinder and pipeline structures are removed, the appearance of the mold is regular, and transportation and installation are simple and convenient. Since the mechanical front mold ejecting structure is instantaneously linked with the mold opening action, the time for the oil cylinder action is saved, and the injection molding production efficiency is improved. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a mold with a mechanical front mold ejecting structure of the utility model;

[0017] Figure 2 is a schematic diagram of a mechanical front mold ejecting structure of the utility model;

[0018] Figure 3 is a sectional view of a mechanical front mold ejecting structure of the utility model;

[0019] Figure 4 is a schematic diagram of a mechanical front mold ejecting structure of the utility model;

[0020] Figure 5 is a schematic diagram of a mechanical front mold ejecting structure of the utility model;

[0021] Figure 6 is a schematic diagram of the pull rod of a mechanical front mold ejecting structure of the utility model;

[0022] Figure 7 It is a schematic diagram of a guide block of a mechanical front mold ejection structure of the present utility model;

[0023] Figure 8 It is a schematic diagram of a ejector block of a mechanical front mold ejection structure of the present utility model;

[0024] Figure 9 It is a schematic diagram of a first intermediate plate of a mechanical front mold ejection structure of the present utility model;

[0025] Markings of each component in the attached drawings: 1 - front mold; 11 - upper plate; 12 - first intermediate plate; 12a - guide groove; 2 - rear mold; 21 - second intermediate plate; 22 - lower plate; 3 - mechanical front mold ejection structure; 31 - ejection assembly; 311 - pull rod; 3111 - hook rod; 3111a - first chamfer; 3111b - hook groove; 3111c - second chamfer; 3112 - fixed block; 3113 - strip-shaped through groove; 312 - guide block; 312a - third chamfer; 313 - first bolt; 314 - second bolt; 32 - ejection component; 321 - spring; 322 - ejector block; 3221 - sliding part; 3221a - fourth chamfer; 3222 - limiting part; 323 - third bolt. Specific embodiments

[0026] The utility model purpose of the present utility model will be further described in detail below in conjunction with the attached drawings and specific embodiments. The embodiments cannot be elaborated one by one here, but the implementation manners of the present utility model are not limited to the following embodiments.

[0027] Such as Figures 1-5As shown in Figure 9, the mold includes a front mold 1, a rear mold 2 and two mechanical front mold ejection structures 3. The front mold 1 includes an upper plate 11 and a first middle plate 12, and the rear mold 2 includes a second middle plate 21 and a lower plate 22. Each mechanical front mold ejection structure 3 includes an ejection assembly 31 and an ejection assembly 32. Each ejection assembly 31 includes a pull rod 311, a guide block 312, a first bolt 313 and a second bolt 314. Each ejection assembly 32 includes an elastic member and an ejection block 322. The elastic member is a spring 321. The first middle plate 12 is symmetrically provided with guide grooves 12a on both sides. The upper plate 11 covers the top of the first middle plate 12 to form a guide groove. The guide groove is a T-shaped structure. The first middle plate 12 is connected to the upper plate 11 by a third bolt 323. One end of the elastic member abuts against one end of the guide groove, and the other end of the elastic member abuts against one end of the pop-up block 322. The pop-up block 322 can slide in and out of the guide groove. The pop-up block 322 is a T-shaped structure. The pop-up block 322 is limited by the guide groove of the T-shaped structure, which can prevent the pop-up block 322 from escaping from the guide groove. The other end of the pop-up block 322 can be embedded in the upper end of the pull rod 311. The lower end of the pull rod 311 is mounted on both sides of the lower plate 22 by the first bolt 313, and the guide block 312 is mounted on both sides of the second middle plate 21 by the second bolt 314. The pull rod 311 can slide along the guide block 312. The pull rod 311 has a strip-shaped through groove along the middle to the upper end. The guide block 312 is located in the strip-shaped through groove, and the pull rod 311 can slide relative to the guide block 312. The guide block 312 is mounted on both sides of the second middle plate 21 by the second bolt 314.

[0028] The mechanical front mold ejection structure 3 can ensure the stability and reliability of the first middle plate 12 during the ejection process. The ejection assembly 31 is used to eject the front mold 1; the pull rod 311 is used to push the ejection block 322 into the guide groove and to hook the ejection block 322 to tighten the front mold 1; the guide block 312 guides the sliding of the pull rod 311; the ejection assembly 32 cooperates with the ejection assembly 31 to eject the front mold 1; the elastic member is used to reset the ejection block 322; the ejection block 322 can be hooked by the pull rod 311 or pushed into the guide groove of the front mold 1.

[0029] like Figure 6As shown in the figure, the pull rod 311 is of a U-shaped structure, which includes two hook rods 3111 and a fixing block 3112. The two hook rods 3111 form a strip-shaped through groove 3113, and the guide block 312 is located in the strip-shaped through groove 3113 to guide the pull rod 311. At the top of the hook rod, there are two first chamfers 3111a, which are used to facilitate the pull rod 311 to push the ejector block 322 into the guide groove through the inclined surface, and also facilitate the separation of the front mold 1 and the rear mold 2. Below the first chamfer 3111a, there is a hook groove 3111b, which is used to hook the ejector block 322, so that there is no need to additionally add a cylinder to hold the front mold 1. On the side of the hook groove 3111b away from the first chamfer 3111a, there is a second chamfer 3111c, and the second chamfer 3111c can push the ejector block 322 into the guide groove through its inclined surface. The first chamfer 3111a and the second chamfer 3111c are parallel to each other. At the lower part of the fixing block 3112 of the pull rod 311, there are multiple screw holes, and the multiple screw holes are used for the first bolt 313 to pass through and fix the pull rod 311 on the rear mold 2.

[0030] As Figure 7 shown, the guide block 312 is of a cuboid structure, and there is a third chamfer 312a on the guide block 312. The third chamfer 312a is parallel to the first chamfer 3111a and the second chamfer 3111b of the pull rod 311. The third chamfer 312a is used to push the ejector block 322 into the guide groove.

[0031] As Figure 8 shown, the ejector block 322 is of a T-shaped structure, which includes a sliding part 3221 and a limiting part 3222. The limiting part 3222 is connected to both sides of the sliding part 3221. The sliding part 3221 is slidably installed in the guide groove, and the limiting part is limited in the guide groove of the front mold 1. At one end of the sliding part 3221 away from the limiting part, there is a fourth chamfer 3221a, and the fourth chamfer 3221a is located at the junction of the side surface and the bottom surface of the sliding part 3221. The fourth chamfer 3221a is parallel to the third chamfer 312a. The structure of the ejector block 322 is similar to that of the guide groove, but the size of the ejector block 322 is slightly smaller than the size of the guide groove of the front mold 1. There is a fourth chamfer 322a on the ejector block 322, and the fourth chamfer 322a is located at the junction of the bottom surface and the side surface of the ejector block 322. The fourth chamfer 322a is parallel to the first chamfer 3111a and the second chamfer 3111c. The fourth chamfer 322a is used to facilitate the guide block 312 to push and press the ejector block 322 through the inclined surface.

[0032] Description of the working process of the mechanical front mold ejection structure: The rear mold 2 drives the pull rod 311 to move forward along the guide block 312. When the first chamfer 3111a of the pull rod 311 matches the fourth chamfer 322a of the ejection block 322, the pull rod 311 presses the ejection block 322 into the guide groove of the front mold 1. The pull rod 311 continues to move forward. When the hook groove 3111b of the pull rod 311 moves to the position where the ejection block 322 is located, the ejection block 322 is not pressed by the pull rod 311, and the ejection block 322 pops out and enters the hook groove 3111b of the pull rod 311, and the pull rod 311 indirectly hooks the front mold 1. When the pull rod 311 continues to move forward, with the cooperation of the second chamfer 3111c and the fourth chamfer 322a and the third chamfer 312a and the fourth chamfer 322a, the pull rod 311 presses the ejection block 322 to enter the guide groove of the front mold 1 again.

[0033] The above specific implementation manners are the preferred embodiments of the present invention and cannot limit the present invention. Any other changes or other equivalent replacement methods made without departing from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A mechanical front mold ejection structure, characterized in that: The invention comprises an ejection component and a pop-up component, wherein the ejection component comprises a pull rod, and the pop-up component comprises an elastic member and a pop-up block. A first chamfer is arranged at the top end of the pull rod, a hook groove is arranged below the first chamfer, a second chamfer is arranged on the side of the hook groove away from the first chamfer, the bottom end of the pull rod is mounted on both sides of the rear mold, one end of the elastic member abuts against one end of the guide groove of the front mold, the other end of the elastic member abuts against one end of the pop-up block, a fourth chamfer is arranged at the other end of the pop-up block, the first chamfer, the second chamfer and the fourth chamfer are parallel to each other, and the pop-up block can be embedded in the hook groove.

2. According to claim 1, a mechanical front mold ejection structure is characterized in that: It also includes a guide block. The rear mold includes a second middle plate and a lower plate. The guide blocks are installed on both sides of the second middle plate. The pull rod is provided with a strip-shaped through groove. The guide block is located in the strip-shaped through groove. The pull rod can slide relative to the guide block.

3. A mechanical front mold ejection structure according to claim 2, characterized in that: It also includes a second bolt, and the guide block is installed on the second middle plate through the second bolt.

4. According to claim 2, a mechanical front mold ejection structure is characterized in that: The guide block is provided with a third chamfer, and the third chamfer and the fourth chamfer are parallel to each other.

5. The mechanical front mold ejection structure according to claim 1, characterized in that: The pop-up block includes a sliding portion and a limiting portion, the limiting portion is respectively connected to two sides of the sliding portion, the fourth chamfer is arranged at one end of the sliding portion away from the elastic member, and the sliding portion and the limiting portion are both matched with the guide groove.

6. The mechanical front mold ejection structure according to claim 2, characterized in that: It also includes a first bolt, and the pull rod is installed on the lower plate through the first bolt.

7. The mechanical front mold ejection structure according to claim 1, characterized in that: The elastic member is a spring.

8. The mechanical front mold ejection structure according to claim 1, characterized in that: The number of the ejection structures is 2.

9. A mechanical front mold ejection structure according to claim 8, characterized in that: The ejection structures are symmetrically arranged.

10. The mechanical front mold ejection structure according to claim 1, characterized in that: The front mold includes an upper plate and a first middle plate, the first middle plate is provided with a guide groove, and the upper plate covers the top of the first middle plate to form the guide groove.

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