Injection mold convenient to demold

Abstract

The injection mold comprises a first mounting plate and a second mounting plate, a first fixed mold and a second fixed mold are arranged on one side of the first mounting plate in a sliding mode, guide grooves are formed in the top ends and the bottom ends of the first fixed mold and the second fixed mold, and an electric hydraulic cylinder is fixedly connected to one side of the second mounting plate. The electric hydraulic cylinder drives the movable die to be separated from the first fixed die and the second fixed die, so that the idler wheel on the driven rod slides in the guide grooves in the first fixed die and the second fixed die, vertical force generated by the electric hydraulic cylinder is changed into thrust in the horizontal direction in the sliding process, and the first fixed die and the second fixed die are separated; rapid demolding of a barreled injection molding part in the fixed mold is achieved, the situation that demolding is not easy due to adhesion between the surface of the injection molding part and the interior of the fixed mold is avoided, the structure is simple, the demolding effect is good, the demolding speed is high, and the demolding efficiency of a plastic barrel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold which is easy to demould. Background Art

[0002] Injection mold, also known as injection mold for short, is a mold used for plastic injection molding. Injection molding is a molding method that combines injection and molding. Its advantages are fast production speed, high efficiency, automated operation, and precise product size. It is suitable for mass production and molding of complex-shaped products.

[0003] In the prior art, for example, Chinese patent CN219044098U discloses an "injection mold for easy demolding", comprising a base, a cooling box is arranged on the top of the base, an injection mold body is arranged on the inner wall of the cooling box, a through hole is opened on the inner wall of the injection mold body, a slide groove is opened on the inner wall of the injection mold body, a slide plate is arranged on the inner wall of the slide groove, and a threaded sleeve is arranged on the bottom of the slide plate.

[0004] At present, the molds for producing barrel-shaped injection molded parts are equipped with demoulding devices that use the elastic force of springs to eject the cooled and formed barrel-shaped injection molded parts from the bottom of the mold. However, since the outer wall of the injection molded parts may adhere to the mold cavity when the injection molded parts are cooled, it is difficult for the injection molded parts to fall out of the mold cavity, and workers need to take them out, resulting in low demoulding efficiency. Utility Model Content

[0005] The utility model aims to provide an injection mold which is easy to demould, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an injection mold that is easy to demold, comprising a No. 1 mounting plate and a No. 2 mounting plate, a first fixed mold and a second fixed mold are slidably arranged on one side of the No. 1 mounting plate, the top and bottom ends of the first fixed mold and the second fixed mold are provided with guide grooves, one side of the No. 2 mounting plate is fixedly connected to an electric hydraulic cylinder, the telescopic end of the electric hydraulic cylinder is fixedly connected to a movable mold, the top and bottom ends of the movable mold are fixedly connected to two driven rods, the inner sides of the four driven rods are rotatably connected to rollers, and the outer surfaces of the four rollers are respectively slidably connected to the inner surfaces of the four guide grooves.

[0007] As a further preferred embodiment of the present technical solution, a receiving groove is provided on one side of the movable mold, a ejector ring is slidably inserted inside the receiving groove, four driven columns are fixedly connected to one side of the ejector ring, one ends of the four driven columns pass through the bottom surface of the receiving groove, and a retaining ring is fixedly connected to one side of the No. 2 mounting plate, one ends of the four driven columns are in contact with one side of the retaining ring.

[0008] As a further preferred embodiment of the technical solution, the outer surfaces of the four driven columns are sleeved with return springs, and one end of the four return springs is fixedly connected to one side of the movable mold.

[0009] As a further preferred embodiment of the present technical solution, four positioning through holes are formed through one side of the second mounting plate, positioning columns are slidably connected inside the four positioning through holes, and one end of the four positioning columns is fixedly connected to one side of the movable mold.

[0010] As a further preferred embodiment of the present technical solution, one end of the four driven columns and one end of the four positioning columns are fixedly connected with a limiting cap.

[0011] As a further preferred embodiment of the present technical solution, four sliding grooves are opened on one side of the No. 1 mounting plate, and four sliders are slidably connected inside the four sliding grooves, and the four sliders are respectively fixedly connected to one side of the first fixed mold and the second fixed mold.

[0012] As a further preferred embodiment of the technical solution, four positioning rods are fixedly connected to one side of the second fixed mold, four positioning grooves are opened on one side of the first fixed mold, and one end of the four positioning rods are respectively plugged into the inside of the four positioning grooves.

[0013] The utility model provides an injection mold that is easy to demould, and has the following beneficial effects:

[0014] (1) The utility model drives the movable mold to separate from the first fixed mold and the second fixed mold through the electric hydraulic cylinder, so that the roller on the driven rod slides in the guide grooves on the first fixed mold and the second fixed mold, and during the sliding process, the vertical force generated by the electric hydraulic cylinder is changed into a thrust in the horizontal direction, so as to separate the first fixed mold and the second fixed mold, thereby realizing the rapid demolding of the barreled injection molded parts in the fixed mold, avoiding the situation that the surface of the injection molded parts adheres to the inside of the fixed mold and is difficult to demold. The utility model has a simple structure, good demolding effect and fast demolding speed, and improves the demolding efficiency of the plastic barrel.

[0015] (2) In the process of the movable mold moving, the four driven columns of the utility model contact with the resisting ring, and the force exerted on the movable mold is converted into a thrust on the ejector ring, so that the ejector ring pushes the injection molded part on the mold core to be demolded. The utility model has a simple structure, is easy to operate, and reduces the use of power devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the expansion of the first fixed mold and the second fixed mold structure of the utility model;

[0018] Figure 3It is an exploded schematic diagram of the structure between the first fixed mold, the second fixed mold and the first mounting plate of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the movable mold of the utility model.

[0020] In the figure: 1. Mounting plate No. 1; 2. First fixed die; 3. Second fixed die; 4. Guide groove; 5. Moving die; 6. Follower rod; 7. Mounting plate No. 2; 8. Electric hydraulic cylinder; 9. Slide groove; 10. Sliding block; 11. Positioning rod; 12. Positioning groove; 13. Roller; 14. Receiving groove; 15. Ejecting ring; 16. Follower column; 17. Return spring; 18. Positioning column; 19. Positioning through hole; 20. Limiting cap; 21. Retaining ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a technical solution: Figure 1-3 As shown, in the present embodiment, an injection mold for easy demoulding comprises a mounting plate No. 1 1 and a mounting plate No. 2 7, a first fixed mold 2 and a second fixed mold 3 are slidably arranged on one side of the mounting plate No. 1 1, a guide groove 4 is provided at the top and bottom ends of the first fixed mold 2 and the second fixed mold 3, an electric hydraulic cylinder 8 is fixedly connected to one side of the mounting plate No. 2 7, a movable mold 5 is fixedly connected to the telescopic end of the electric hydraulic cylinder 8, two driven rods 6 are fixedly connected to the top and bottom ends of the movable mold 5, rollers 13 are rotatably connected to the inner sides of the four driven rods 6, and the outer surfaces of the four rollers 13 are respectively slidably connected to the inner surfaces of the four guide grooves 4, wherein, by providing the guide grooves 4 and the driven rods 6, the force generated by the movement of the movable mold 5 can be converted into a thrust on the first fixed mold 2 and the second fixed mold 3, so that the first fixed mold 2 and the second fixed mold 3 can be separated, by providing the electric hydraulic cylinder 8, the movable mold 5 can be driven to move, and by providing the rollers 13, the friction between the guide grooves 4 and the driven rods 6 can be reduced.

[0023] like Figure 2 and Figure 4 As shown, a receiving groove 14 is opened on one side of the movable mold 5, and a ejector ring 15 is slidably inserted inside the receiving groove 14, and four driven columns 16 are fixedly connected to one side of the ejector ring 15, and one end of the four driven columns 16 passes through the bottom surface of the inner part of the receiving groove 14, and a retaining ring 21 is fixedly connected to one side of the No. 2 mounting plate 7, and one end of the four driven columns 16 contacts one side of the retaining ring 21. By setting the retaining ring 21, the driven columns 16 can be pushed to move when the movable mold 5 is demolded, and by setting the ejector ring 15, the injection molded parts on the mold core can be demolded.

[0024] like Figure 4As shown, the outer surfaces of the four driven columns 16 are sleeved with reset springs 17 , one end of the four reset springs 17 is fixedly connected to one side of the movable mold 5 , which can reset the driven columns 16 and further drive the ejector ring 15 to enter the receiving groove 14 .

[0025] like Figure 2 and Figure 4 As shown, four positioning through holes 19 are opened through one side of the second mounting plate 7, and positioning columns 18 are slidably connected inside the four positioning through holes 19. One end of the four positioning columns 18 is fixedly connected to one side of the movable mold 5, which can position the movable mold 5 to prevent it from being skewed and improve stability.

[0026] like Figure 1 , Figure 2 and Figure 4 As shown, one end of each of the four driven columns 16 and the four positioning columns 18 is fixedly connected with a limiting cap 20, which can limit the moving distance and prevent falling off.

[0027] like Figure 3 As shown, four slide grooves 9 are opened on one side of the No. 1 mounting plate 1, and four sliders 10 are slidably connected inside the four slide grooves 9. The four sliders 10 are fixedly connected to one side of the first fixed mold 2 and the second fixed mold 3 respectively. By setting the slide grooves 9 and the sliders 10, the first fixed mold 2 and the second fixed mold 3 can slide on the No. 1 mounting plate 1 to achieve the unfolding effect.

[0028] like Figure 3 As shown, four positioning rods 11 are fixedly connected to one side of the second fixed mold 3, and four positioning grooves 12 are opened on one side of the first fixed mold 2. One end of the four positioning rods 11 is respectively plugged into the four positioning grooves 12, so as to position the first fixed mold 2 and the second fixed mold 3, so that when the first fixed mold 2 and the second fixed mold 3 are merged, there will be no skew.

[0029] The utility model provides an injection mold that is easy to demould, and the specific working principle is as follows:

[0030] After the injection molding of the barreled injection molded parts is completed, the electric hydraulic cylinder 8 is started, and the electric hydraulic cylinder 8 drives the movable mold 5 to separate from the first fixed mold 2 and the second fixed mold 3, so that the roller 13 on the driven rod 6 slides in the guide groove 4 on the first fixed mold 2 and the second fixed mold 3, and during the sliding process, the vertical force generated by the electric hydraulic cylinder 8 is changed into a thrust in the horizontal direction, so that the first fixed mold 2 and the second fixed mold 3 are separated, and the injection molded parts in the first fixed mold 2 and the second fixed mold 3 are quickly demolded, and then the movable mold 5 continues to move. When the four driven columns 16 contact the bottom surface of the retaining ring 21, the force exerted on the driven rod 6 is converted into a thrust on the ejector ring 15 under the drive of the movable mold 5, so that the ejector ring 15 pushes the injection molded parts on the mold core to fall off.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for easy demoulding, comprising a first mounting plate (1) and a second mounting plate (7), characterized in that: A first fixed mold (2) and a second fixed mold (3) are slidably arranged on one side of the first mounting plate (1), and guide grooves (4) are provided at the top and bottom of the first fixed mold (2) and the second fixed mold (3). An electric hydraulic cylinder (8) is fixedly connected to one side of the second mounting plate (7), and a movable mold (5) is fixedly connected to the telescopic end of the electric hydraulic cylinder (8), and two driven rods (6) are fixedly connected to the top and bottom of the movable mold (5), and rollers (13) are rotatably connected to the inner sides of the four driven rods (6), and the outer surfaces of the four rollers (13) are respectively slidably connected to the inner surfaces of the four guide grooves (4).

2. The injection mold for easy demoulding according to claim 1, characterized in that: A receiving groove (14) is provided on one side of the movable mold (5), a material ejection ring (15) is slidably inserted inside the receiving groove (14), four driven columns (16) are fixedly connected to one side of the material ejection ring (15), one end of each of the four driven columns (16) passes through the inner bottom surface of the receiving groove (14), and a retaining ring (21) is fixedly connected to one side of the second mounting plate (7), one end of each of the four driven columns (16) contacts one side of the retaining ring (21).

3. The injection mold for easy demoulding according to claim 2, characterized in that: The outer surfaces of the four driven columns (16) are sleeved with return springs (17), and one end of the four return springs (17) is fixedly connected to one side of the movable mold (5).

4. The injection mold for easy demoulding according to claim 3, characterized in that: Four positioning through holes (19) are formed through one side of the second mounting plate (7), and positioning columns (18) are slidably connected inside the four positioning through holes (19), and one end of the four positioning columns (18) is fixedly connected to one side of the movable mold (5).

5. The injection mold for easy demoulding according to claim 4, characterized in that: One end of each of the four driven columns (16) and the four positioning columns (18) is fixedly connected with a limiting cap (20).

6. The injection mold for easy demoulding according to claim 1, characterized in that: Four slide grooves (9) are provided on one side of the first mounting plate (1), and four sliders (10) are slidably connected inside the four slide grooves (9), and the four sliders (10) are fixedly connected to one side of the first fixed mold (2) and the second fixed mold (3), respectively.

7. The injection mold for easy demoulding according to claim 6, characterized in that: One side of the second fixed mold (3) is fixedly connected with four positioning rods (11), one side of the first fixed mold (2) is provided with four positioning grooves (12), and one end of the four positioning rods (11) is respectively plugged into the inside of the four positioning grooves (12).

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