Injection mold convenient to demold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to an injection mold convenient to demold, which comprises an upper mold, a lower mold is attached to the bottom of the upper mold, a stand column is fixedly connected to the bottom of the lower mold, and a bottom plate is fixedly connected to the bottom of the stand column. And the upper surface of the bottom plate is fixedly connected with a first U-shaped plate. According to the injection mold convenient to demold, through cooperation of a telescopic plate, an electric telescopic rod, an elastic support and a poke rod, the jacking force of a jacking rod on a workpiece in the lower mold cannot be continuously increased after the jacking force reaches the specified value, and therefore the situation that the surface of the formed workpiece is damaged due to the too large jacking force in the demolding process is avoided; the ejector rod can be fixed through the attraction force of the electromagnet to the telescopic plate, so that when the injection mold performs injection molding on a workpiece, the situation that the surface of the formed workpiece is unqualified due to up-down jumping of the ejector rod is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold technical field, concretely relates to an injection mold convenient for demolding. BACKGROUND

[0002] Injection mold is a tool for producing plastic products, and is also a tool for giving plastic products complete structure and accurate size. Injection molding is a processing method used in batch production of some complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity by an injection molding machine under high pressure, and obtaining a shaped product after cooling and solidification.

[0003] At present, after the raw materials are cooled and formed in the injection mold, the formed workpiece is mostly pushed out from the mold by the upward moving ejector rod in the injection mold, such as the injection mold convenient for demolding disclosed in Chinese patent No. CN217944146U. However, the ejector rod is difficult to control in the process of ejecting the workpiece, which may easily damage the surface of the workpiece due to excessive ejecting force, affecting the product quality. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an injection mold convenient for demolding, which solves the problem that the ejector rod is difficult to control in the process of ejecting the workpiece, which may easily damage the surface of the workpiece due to excessive ejecting force.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] An injection mold convenient for demolding, comprising an upper mold, a lower mold is attached to the bottom of the upper mold, a stand is fixedly connected to the bottom of the lower mold, a bottom plate is fixedly connected to the bottom of the stand, a first U-shaped plate is fixedly connected to the upper surface of the bottom plate, an electromagnet is fixedly connected to the upper surface of the first U-shaped plate, an extension plate is fixedly connected to the upper surface of the electromagnet, an ejector rod is fixedly connected to the upper surface of the extension plate, an ejection hole is formed in the inside of the lower mold, the inner wall of the ejection hole is attached to the surface of the ejector rod, an electric telescopic rod is fixedly connected to the bottom of the lower mold, an elastic support is fixedly connected to the bottom of the electric telescopic rod, a push rod is fixedly connected to the side surface of the elastic support, and the upper surface of the push rod is attached to the bottom of the extension plate.

[0007] The utility model further sets up, the telescopic board includes iron sheet, first cylinder, side plate, second U shaped board, hollow column, first bolt, first nut and baffle ring, the upper surface of iron sheet and the bottom of top rod fixed connection, the bottom of iron sheet and the upper surface of electromagnet fit, the left and right sides of iron sheet all with the side surface fixed connection of first cylinder, the front and back sides of side plate all with the surface fixed connection of second U shaped board, the inner wall of second U shaped board and the surface of first cylinder fit, the bottom of hollow column and the upper surface of side plate fixed connection, the inner wall of hollow column and the surface of first bolt fit, the surface of first bolt and the inner wall of first nut thread connection, the bottom of first nut and the upper surface of iron sheet fixed connection, the surface of first bolt and the inner wall of baffle ring fixed connection, the side of baffle ring and the side of hollow column fit, the upper surface of the rod of stirring and the bottom of iron sheet fit.

[0008] The utility model further sets up, the elastic support includes horizontal plate, third U shaped board, bearing, second cylinder, scroll spring and fourth U shaped board, the upper surface of horizontal plate and the bottom of electric telescopic rod fixed connection, the upper surface of third U shaped board and the upper surface of fourth U shaped board all with the bottom of horizontal plate fixed connection, the inner wall of third U shaped board and the outer ring of bearing fixed connection, the inner ring of bearing and the surface of second cylinder fixed connection, the surface of second cylinder and the inner wall of scroll spring fixed connection, the surface of scroll spring and the inner wall of fourth U shaped board fixed connection, the side of second cylinder and the side of the rod of stirring fixed connection.

[0009] The utility model further sets up, the initial elastic force of scroll spring is greater than the gravity of the rod of stirring, telescopic board and top rod.

[0010] The utility model further sets up, the front and back sides of iron sheet all are fixedly connected with scale ruler, the upper and lower sides of scale ruler all with the inner wall of second U shaped board fit.

[0011] The utility model further sets up, the inside of iron sheet is equipped with round hole, the inner wall of round hole and the upper surface of iron sheet all fit and are provided with second bolt, the surface of second bolt is connected with second nut with screw thread, the bottom of second nut and the upper surface of first U shaped board fixed connection.

[0012] The utility model discloses technical effect obtained for:

[0013] The utility model discloses an injection mold convenient to demould through the cooperation of telescopic plate, electric telescopic link, elastic support and poking rod, makes the ejection force of ejector rod to the workpiece in lower mould, will not continue to increase after reaching the specified size, and the workpiece after forming will not cause the workpiece surface damage because of the ejection force being too big when demoulding, and when electromagnet contacts telescopic plate, through the suction of electromagnet to telescopic plate, can fix the ejector rod, and then the injection mold when injection workpiece, will not cause the workpiece surface after forming to be unqualified because of the up and down bounce of ejector rod.

[0014] The utility model discloses an injection mold convenient to demould through the cooperation of first cylinder, second U-shaped plate, hollow column, first bolt, first nut and baffle ring, makes the user through the rotation first bolt, can make the distance between side plate and iron plate change, and can adjust the maximum ejection force of ejector rod to the workpiece in lower mould through the change distance between side plate and iron plate, to make the injection mold can adapt to different kinds of raw materials. DRAWINGS

[0015] Figure 1 It is the three-dimensional schematic view of the structure of the utility model;

[0016] Figure 2 It is the front view of the structure of the utility model;

[0017] Figure 3 It is the side view of the structure of the utility model;

[0018] Figure 4 It is the plan view of lower mould in the utility model;

[0019] Figure 5 It is the plan view of bottom plate in the utility model;

[0020] Figure 6 It is the three-dimensional schematic view of telescopic plate in the utility model;

[0021] Figure 7 It is the plan view of telescopic plate in the utility model;

[0022] Figure 8 It is the side view of telescopic plate in the utility model;

[0023] Figure 9 It is Figure 8 The enlarged view of A place in the utility model;

[0024] Figure 10 It is the three-dimensional schematic view of elastic support in the utility model;

[0025] Figure 11 It is the front view of elastic support in the utility model;

[0026] Figure 12 It is Figure 11Sectional view at point BB.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Upper mold; 2. Lower mold; 3. Column; 4. Base plate; 5. First U-shaped plate; 6. Electromagnet; 7. Telescopic plate; 71. Iron plate; 72. First cylinder; 73. Side plate; 74. Second U-shaped plate; 75. Hollow column; 76. First bolt; 77. First nut; 78. Retaining ring; 8. Ejector rod; 9. Ejection hole; 10. Electric telescopic rod; 11. Elastic bracket; 111. Horizontal plate; 112. Third U-shaped plate; 113. Bearing; 114. Second cylinder; 115. Scroll spring; 116. Fourth U-shaped plate; 12. Actuating rod; 13. Scale; 14. Round hole; 15. Second bolt; 16. Second nut. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figures 1 to 12 As shown, an injection mold for easy demolding includes an upper mold 1, a lower mold 2 attached to the bottom of the upper mold 1, a column 3 fixedly connected to the bottom of the lower mold 2, a base plate 4 fixedly connected to the bottom of the column 3, a first U-shaped plate 5 fixedly connected to the upper surface of the base plate 4, an electromagnet 6 fixedly connected to the upper surface of the first U-shaped plate 5, a telescopic plate 7 fixedly connected to the upper surface of the electromagnet 6, an ejector rod 8 fixedly connected to the upper surface of the telescopic plate 7, an ejection hole 9 is provided inside the lower mold 2, the inner wall of the ejection hole 9 is attached to the surface of the ejector rod 8, an electric telescopic rod 10 is fixedly connected to the bottom of the lower mold 2, an elastic bracket 11 is fixedly connected to the bottom of the electric telescopic rod 10, a toggle rod 12 is fixedly connected to the side of the elastic bracket 11, and the upper surface of the toggle rod 12 is attached to the bottom of the telescopic plate 7.

[0032] The telescopic plate 7 comprises an iron plate 71, a first cylinder 72, a side plate 73, a second U-shaped plate 74, a hollow column 75, a first bolt 76, a first nut 77 and a blocking ring 78. The upper surface of the iron plate 71 is fixedly connected with the bottom of the ejector rod 8, the bottom of the iron plate 71 is attached to the upper surface of the electromagnet 6, the left and right sides of the iron plate 71 are fixedly connected with the side surface of the first cylinder 72, the front and back sides of the side plate 73 are fixedly connected with the surface of the second U-shaped plate 74, the inner wall of the second U-shaped plate 74 is attached to the surface of the first cylinder 72, the bottom of the hollow column 75 is fixedly connected with the upper surface of the side plate 73, the inner wall of the hollow column 75 is attached to the surface of the first bolt 76, the surface of the first bolt 76 is threadedly connected with the inner wall of the first nut 77, the bottom of the first nut 77 is fixedly connected with the upper surface of the iron plate 71, the surface of the first bolt 76 is fixedly connected with the inner wall of the blocking ring 78, the side surface of the blocking ring 78 is attached to the side surface of the hollow column 75, and the upper surface of the push rod 12 is attached to the bottom of the iron plate 71.

[0033] The elastic support 11 comprises a horizontal plate 111, a third U-shaped plate 112, a bearing 113, a second cylinder 114, a volute spring 115 and a fourth U-shaped plate 116. The upper surface of the horizontal plate 111 is fixedly connected with the bottom of the electric telescopic rod 10, the upper surfaces of the third U-shaped plate 112 and the fourth U-shaped plate 116 are fixedly connected with the bottom of the horizontal plate 111, the inner wall of the third U-shaped plate 112 is fixedly connected with the outer ring of the bearing 113, the inner ring of the bearing 113 is fixedly connected with the surface of the second cylinder 114, the surface of the second cylinder 114 is fixedly connected with the inner wall of the volute spring 115, the surface of the volute spring 115 is fixedly connected with the inner wall of the fourth U-shaped plate 116, the side surface of the second cylinder 114 is fixedly connected with the side surface of the push rod 12, and the initial elastic force of the volute spring 115 is greater than the gravity sum of the push rod 12, the telescopic plate 7 and the ejector rod 8.

[0034] It should be noted that when the electromagnet 6 contacts the telescopic plate 7, the iron plate 71 on the telescopic plate 7 is attracted by the electromagnet 6, so that the ejector rod 8 is fixed, and thus when the injection mold is used to inject a workpiece, the workpiece after molding will not have an unqualified surface due to the up-and-down movement of the ejector rod 8.

[0035] When the push rod 12 is located below the side plate 73, and the electric telescopic rod 10 controls the upward movement of the push rod 12, the second cylinder 114 is rotated through the cooperation of the push rod 12 and the side plate 73, and the ejector rod 8 exerts an upward thrust on the workpiece in the lower mold 2 through the elastic force of the volute spring 115. At this time, the workpiece is moved out of the lower mold 2 through the upward thrust of the ejector rod 8 on the workpiece.

[0036] Meanwhile, the upward movement of the ejector rod 12 will increase the upward force of the ejector rod 8 on the workpiece, and when the workpiece is stuck in the lower mold 2 and cannot be normally ejected, the ejector rod 12 will be separated from the side plate 73 and moved above the side plate 73 under the action of the electric telescopic rod 10, at this time, the ejector rod 8 will not continue to increase the upward force on the workpiece after reaching the specified size.

[0037] When the ejector rod 12 moves downward from above the side plate 73, the ejector rod 12 can rotate freely around the second cylinder 114, and then the ejector rod 12 can be directly moved below the side plate 73.

[0038] Through the cooperation of the second U-shaped plate 74 and the first cylinder 72, the side plate 73 and the iron plate 71 are always parallel, when the user rotates the first bolt 76, the first bolt 76 moves left or right through the cooperation of the first bolt 76 and the nut, and the side plate 73 moves with the first bolt 76 through the cooperation of the blocking ring 78 and the hollow cylinder 75.

[0039] Meanwhile, by changing the distance between the side plate 73 and the iron plate 71, the angle of rotation of the ejector rod 12 when it is separated from the side plate 73 can be changed, and the spring force of the volute spring 115 when the ejector rod 12 is separated from the side plate 73 can be changed, at this time, by changing the spring force of the volute spring 115 when the ejector rod 12 is separated from the side plate 73, the maximum upward force of the ejector rod 8 on the workpiece in the lower mold 2 can be adjusted, so that the injection mold can be adapted to different types of raw materials.

[0040] As shown in Figures 1 to 9 The front and back of the iron plate 71 are fixedly connected with the scale 13, the upper and lower sides of the scale 13 are attached to the inner wall of the second U-shaped plate 74, and the user can intuitively judge the distance between the side plate 73 and the iron plate 71 through the scale 13.

[0041] As shown in Figures 1 to 7 The inside of the iron plate 71 is provided with a circular hole 14, the inner wall of the circular hole 14 and the upper surface of the iron plate 71 are attached with the second bolt 15, the surface of the second bolt 15 is threadedly connected with the second nut 16, and the bottom of the second nut 16 is fixedly connected with the upper surface of the first U-shaped plate 5.

[0042] It should be noted that when the second bolt 15 is inserted into the circular hole 14 and screwed into the second nut 16, the iron plate 71 can be fixed on the electromagnet 6 through the cooperation of the second bolt 15 and the second nut 16, so that the user will not cause the iron plate 71 to collide with the electromagnet 6 due to vibration when transporting the injection mold.

[0043] The working principle of the utility model discloses is as follows: first, the injection mold is fixed on the injection equipment, then, the second bolt 15 is screwed out from the second nut 16, and the second bolt 15 is separated from the iron plate 71, then, the electric telescopic rod 10 is used to move the poking rod 12 to below the side plate 73, and the electromagnet 6 is opened to generate suction force on the iron plate 71, at this time, the iron plate 71 is fixed on the electromagnet 6 by the suction force.

[0044] When the injection workpiece, first injection equipment lifting mechanism, make the upper die 1 and the lower die 2 together, then, through the injection mechanism on the injection equipment, the raw material is injected into the upper die 1 and the lower die 2, after the raw material is formed in the upper die 1 and the lower die 2, the workpiece after forming can be obtained.

[0045] Then, the lifting mechanism on the injection mold is used to separate the upper die 1 and the lower die 2, and the electromagnet 6 is closed to separate the iron plate 71 from the electromagnet 6, then, the electric telescopic rod 10 is used to control the poking rod 12 to move upwards, at this time, the second cylinder 114 is rotated through the cooperation of the poking rod 12 and the side plate 73, and the ejection rod 8 is used to exert upward ejection force on the workpiece in the lower die 2 through the elastic force of the spiral spring 115, then, the workpiece is moved out from the lower die 2 through the ejection force of the ejection rod 8 on the workpiece.

[0046] When the workpiece is stuck in the lower die 2 and cannot be normally ejected, the poking rod 12 is separated from the side plate 73 and moved to above the side plate 73 under the action of the electric telescopic rod 10, at this time, the ejection rod 8 does not exert ejection force on the workpiece, then, the electric telescopic rod 10 is used to move the poking rod 12 to below the side plate 73, and the poking rod 12 is controlled to move upwards again, so that the ejection rod 8 exerts ejection force on the workpiece again, until the workpiece is moved out from the lower die 2.

[0047] When the workpiece is taken away from the lower die 2, the electric telescopic rod 10 is used to make the poking rod 12 return to the initial position, and the iron plate 71 contacts the electromagnet 6, then, the electromagnet 6 is opened to generate suction force on the iron plate 71, at this time, the iron plate 71 is fixed on the electromagnet 6 by the suction force.

[0048] The above is only the preferred embodiment of the utility model, it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. An injection mold facilitating demolding, characterized by: The utility model provides a mould, including upper mould (1), the bottom of upper mould (1) is matched with lower mould (2) is provided, the bottom of lower mould (2) is fixedly connected with stand (3), the bottom of stand (3) is fixedly connected with bottom plate (4), the upper surface of bottom plate (4) is fixedly connected with first U-shaped board (5), the upper surface of first U-shaped board (5) is fixedly connected with electromagnet (6), the upper surface of electromagnet (6) is fixedly connected with telescopic plate (7), the upper surface of telescopic plate (7) is fixedly connected with top rod (8), the inside of lower mould (2) is provided with ejection hole (9), the inner wall of ejection hole (9) is matched with the surface of top rod (8), the bottom of lower mould (2) is fixedly connected with electric telescopic rod (10), the bottom of electric telescopic rod (10) is fixedly connected with elastic support (11), the side of elastic support (11) is fixedly connected with the lever (12), the upper surface of lever (12) is matched with the bottom of telescopic plate (7).

2. The injection mold facilitating mold release of claim 1, wherein: The telescopic plate (7) includes iron plate (71), first cylinder (72), side plate (73), second U-shaped board (74), hollow column (75), first bolt (76), first nut (77) and baffle ring (78), the upper surface of iron plate (71) is fixedly connected with the bottom of top rod (8), the bottom of iron plate (71) is matched with the upper surface of electromagnet (6), the left and right sides of iron plate (71) are fixedly connected with the side of first cylinder (72), the front and rear sides of side plate (73) are fixedly connected with the surface of second U-shaped board (74), the inner wall of second U-shaped board (74) is matched with the surface of first cylinder (72), the bottom of hollow column (75) is fixedly connected with the upper surface of side plate (73), the inner wall of hollow column (75) is matched with the surface of first bolt (76), the surface of first bolt (76) is threadedly connected with the inner wall of first nut (77), the bottom of first nut (77) is fixedly connected with the upper surface of iron plate (71), the surface of first bolt (76) is fixedly connected with the inner wall of baffle ring (78), the side of baffle ring (78) is matched with the side of hollow column (75), the upper surface of lever (12) is matched with the bottom of iron plate (71).

3. The injection mold facilitating mold release of claim 1, wherein: The elastic support (11) comprises a horizontal plate (111), a third U-shaped plate (112), a bearing (113), a second cylinder (114), a volute spring (115) and a fourth U-shaped plate (116), the upper surface of the horizontal plate (111) is fixedly connected with the bottom of the electric telescopic rod (10), the upper surfaces of the third U-shaped plate (112) and the fourth U-shaped plate (116) are fixedly connected with the bottom of the horizontal plate (111), the inner wall of the third U-shaped plate (112) is fixedly connected with the outer ring of the bearing (113), the inner ring of the bearing (113) is fixedly connected with the surface of the second cylinder (114), the surface of the second cylinder (114) is fixedly connected with the inner wall of the volute spring (115), the surface of the volute spring (115) is fixedly connected with the inner wall of the fourth U-shaped plate (116), and the side surface of the second cylinder (114) is fixedly connected with the side surface of the push rod (12).

4. The injection mold facilitating mold release of claim 3, wherein: The initial elastic force of the volute spring (115) is greater than the gravity sum of the push rod (12), the telescopic plate (7) and the top rod (8).

5. The injection mold facilitating mold release of claim 2, wherein: The front and back sides of the iron plate (71) are fixedly connected with the scales (13), and the upper and lower sides of the scales (13) are attached to the inner walls of the second U-shaped plate (74).

6. The injection mold facilitating mold release of claim 2, wherein: The inside of the iron plate (71) is provided with a circular hole (14), the inner wall of the circular hole (14) and the upper surface of the iron plate (71) are attached with the second bolts (15), the surface of the second bolt (15) is threadedly connected with the second nut (16), and the bottom of the second nut (16) is fixedly connected with the upper surface of the first U-shaped plate (5).

Images