Injection mold with demolding protection structure

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold with a demolding protection structure, which comprises a base, an upper mold fixedly mounted at the bottom of a hydraulic device, and a lower mold fixedly mounted at the top of the base, an ejection assembly for protecting the mold is arranged in the lower mold, and a locking assembly for locking the upper mold is arranged on the side wall of the lower mold. By arranging a sliding groove plate, a sliding groove column, a fixing block, a first cylindrical pin, a first rotating plate, a telescopic rod, a second rotating plate, a second spring, a second cylindrical pin, a rectangular plate, a second fixing plate, a motor, a first rotating shaft, a first cam, a first belt wheel, an extrusion plate, a second rotating shaft, a second belt wheel and a second cam, materials can be slowly ejected out to be prevented from being torn during ejection and demolding; and when a half of the mold is slowly ejected out, the mold can be quickly ejected out, so that the working efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and specifically relates to an injection mold with a demoulding protection structure. Background Technique

[0002] An injection mold is a tool for manufacturing plastic products. It is made of metal materials, usually steel or aluminum alloy, and has a complex cavity structure. It can inject molten plastic into a mold with a specific shape and solidify it into the required product after cooling.

[0003] For the existing injection molds, when demoulding the mold after injection molding is completed, ejector pins are used to eject the plastic products produced in the mold cavity. When the ejector pins stick to the lower mold too fast, the material may be torn, reducing the work efficiency and causing waste of resources. In view of this, we propose an injection mold with a demoulding protection structure. Content of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold with a demoulding protection structure to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An injection mold with a demoulding protection structure includes a base. A fixed column is fixedly installed on the top of the base. A first fixed plate is fixedly installed on the top of the fixed column. A hydraulic device is fixedly installed at the bottom of the first fixed plate. By setting the hydraulic device, the upper mold can be moved up and down. The bottom of the hydraulic device is fixedly installed with an upper mold. A feed pipe is fixedly installed on the side wall of the upper mold. A lower mold is fixedly installed on the top of the base. An ejection assembly for protecting the material is arranged inside the lower mold. A locking assembly for locking the upper mold is arranged on the side wall of the lower mold. The ejection assembly includes:

[0006] A first spring is fixedly installed on the inner wall of the lower mold. By setting the first spring, a reset function can be achieved. The end of the first spring away from the lower mold is fixedly installed with an ejection plate;

[0007] A sliding column is slidably installed inside the lower mold, and the sliding column penetrates through the base. By setting the sliding column, a guiding function can be achieved.

[0008] Preferably, a chute plate is fixedly installed on the side wall of the base. A chute column is slidably installed inside the chute plate. A fixed block is fixedly installed on the side wall of the chute column. A first cylindrical pin is fixedly installed on the side wall of the fixed block. By setting the first cylindrical pin, the first rotating plate can rotate inside it. The first cylindrical pin is rotatably installed on the outer wall of the first rotating plate.

[0009] Preferably, a telescopic rod is fixedly installed on the side wall of the first rotating plate. By setting the telescopic rod, the second spring can be compressed and stretched. One end of the telescopic rod away from the first rotating plate is fixedly installed with a second rotating plate. A second spring is fixedly installed on the side wall of the second rotating plate, and one end of the second spring away from the second rotating plate is fixedly installed on the side wall of the first rotating plate.

[0010] Preferably, a cylindrical pin two is rotatably installed on the inner wall of the second rotating plate, and the cylindrical pin two is fixedly installed on the side wall of the chute plate. A rectangular plate is fixedly installed at the bottom of the chute column. A second fixing plate is fixedly installed on the side wall of the base. A motor is fixedly installed on the side wall of the second fixing plate. A first rotating shaft is fixedly installed at the output end of the motor. By setting the first rotating shaft, a transmission function can be achieved. A first cam is fixedly installed on the outer wall of the first rotating shaft. A first belt pulley is fixedly installed on the side wall of the first rotating shaft. An extrusion plate is fixedly installed on the side wall of the chute column. A second rotating shaft is rotatably installed on the side wall of the base. A second belt pulley is fixedly installed on the outer wall of the second rotating shaft. The second belt pulley is connected to the first belt pulley by a belt. A second cam is fixedly installed on the outer wall of the second rotating shaft.

[0011] Preferably, the locking assembly includes: a hollow block, the hollow block is fixedly installed on the side wall of the lower mold, an inclined block is slidably installed on the inner wall of the hollow block, a connecting column is fixedly installed on the side wall of the inclined block, and a pulling plate is fixedly installed at the end point of the connecting column. By setting the pulling handle, a transmission function can be achieved.

[0012] Preferably, a third spring is fixedly installed on the side wall of the pulling plate, and one end of the third spring away from the pulling plate is fixedly installed on the side wall of the lower mold. A locking rod is fixedly installed on the side wall of the upper mold. By setting the locking rod, the upper mold and the lower mold can be locked.

[0013] Compared with the prior art, the present utility model provides an injection mold with a demoulding protection structure, and has the following beneficial effects:

[0014] 1. For the injection mold with a demoulding protection structure, by setting the first spring, the ejector plate, the sliding column, the chute plate, the chute column, the fixed block, the cylindrical pin one, the first rotating plate, the telescopic rod, the second rotating plate, the second spring, the cylindrical pin two, the rectangular plate, the second fixing plate, the motor, the first rotating shaft, the first cam, the first belt pulley, the extrusion plate, the second rotating shaft, the second belt pulley and the second cam, the injection mold can be ejected slowly during demoulding to prevent the material from being torn, and when it is ejected slowly by half, the material can be ejected quickly to ensure the working efficiency.

[0015] 2. The injection mold with a demolding protection structure is provided with a hollow block, an inclined block, a connecting column, a pulling plate, a spring three and a locking rod. When the upper mold moves downward, it drives the locking rod to move downward. When the locking rod moves downward into the hollow block, the locking rod squeezes the inclined block to move outward. When the inclined block moves outward into the locking rod, the upper mold and the lower mold can be locked, avoiding the phenomenon that the upper mold and the lower mold are offset, resulting in poor injection molding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the half-sectional structure of the present invention;

[0018] Figure 3 It is a schematic diagram of a partial structure of the ejection assembly of the present invention;

[0019] Figure 4 It is a schematic diagram of a partial ejection assembly structure of the present invention;

[0020] Figure 5 It is a schematic diagram of the locking assembly structure of the present invention.

[0021] In the figure: 1. Base; 2. Fixed column; 3. First fixing plate; 4. Hydraulic device; 5. Upper mold; 6. Feeding pipe; 7. Lower mold; 8. Ejection assembly; 81. First spring; 82. Ejection plate; 83. Slide column; 84. Slide groove plate; 85. Slide groove column; 86. Fixed block; 87. First cylindrical pin; 88. First rotating plate; 89. Telescopic rod; 810. Second rotating plate; 811. Second spring; 812. Second cylindrical pin; 813. Rectangular plate; 814. Second fixing plate; 815. Motor; 816. First rotating shaft; 817. First cam; 818. First belt pulley; 819. Extrusion plate; 820. Second rotating shaft; 821. Second belt pulley; 822. Second cam; 9. Locking assembly; 91. Hollow block; 92. Inclined block; 93. Connecting column; 94. Pulling plate; 95. Third spring; 96. Locking rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] As Figures 1-5 shown, the present invention provides a technical solution: an injection mold with a demolding protection structure, including a base 1, a fixed column 2 fixedly installed at the top of the base 1, a first fixing plate 3 fixedly installed at the top of the fixed column 2, a hydraulic device 4 fixedly installed at the bottom of the first fixing plate 3, an upper mold 5 fixedly installed at the bottom of the hydraulic device 4, a feeding pipe 6 fixedly installed on the side wall of the upper mold 5, a lower mold 7 fixedly installed at the top of the base 1, an ejection assembly 8 for protecting the material is arranged inside the lower mold 7, and a locking assembly 9 for locking the upper mold 5 is arranged on the side wall of the lower mold 7.

[0023] The above-mentioned ejecting assembly 8 includes: a first spring 81, an ejecting plate 82, a sliding column 83, a chute plate 84, a chute column 85, a fixing block 86, a first cylindrical pin 87, a first rotating plate 88, a telescopic rod 89, a second rotating plate 810, a second spring 811, a second cylindrical pin 812, a rectangular plate 813, a second fixing plate 814, a motor 815, a first rotating shaft 816, a first cam 817, a first belt pulley 818, an extrusion plate 819, a second rotating shaft 820, a second belt pulley 821 and a second cam 822. The first spring 81 is fixedly installed on the inner wall of the lower mold 7, and the end of the first spring 81 away from the lower mold 7 is fixedly installed with the ejecting plate 82. By setting the ejecting plate 82, the mold can be ejected. The sliding column 83 is slidably installed inside the lower mold 7, and the sliding column 83 penetrates through the base 1. The side wall of the base 1 is fixedly installed with the chute plate 84. By setting the chute plate 84, the chute column 85 can slide inside it. The chute column 85 is slidably installed inside the chute plate 84. The side wall of the chute column 85 is fixedly installed with the fixing block 86. By setting the fixing block 86, the first cylindrical pin 87 can be fixed. The side wall of the fixing block 86 is fixedly installed with the first cylindrical pin 87. The outer wall of the first cylindrical pin 87 is rotatably installed with the first rotating plate 88. The side wall of the first rotating plate 88 is fixedly installed with the telescopic rod 89. The end of the telescopic rod 89 away from the first rotating plate 88 is fixedly installed with the second rotating plate 810. By setting the second rotating plate 810, it can rotate. The side wall of the second rotating plate 810 is fixedly installed with the second spring 811, and the end of the second spring 811 away from the second rotating plate 810 is fixedly installed on the side wall of the first rotating plate 88. By setting the second spring 811, the functions of resetting and stretching can be achieved. The inner wall of the second rotating plate 810 is rotatably installed with the second cylindrical pin 812, and the second cylindrical pin 812 is fixedly installed on the side wall of the chute plate 84. By setting the second cylindrical pin 812, the second rotating plate 810 can rotate inside it. The bottom of the chute column 85 is fixedly installed with the rectangular plate 813. By setting the rectangular plate 813, it can be squeezed by the first cam 817. The side wall of the base 1 is fixedly installed with the second fixing plate 814. By setting the second fixing plate 814, the motor 815 can be fixed. The side wall of the second fixing plate 814 is fixedly installed with the motor 815. The output end of the motor 815 is fixedly installed with the first rotating shaft 816. By setting the first rotating shaft 816, the function of transmission can be achieved. The outer wall of the first rotating shaft 816 is fixedly installed with the first cam 817. The side wall of the first rotating shaft 816 is fixedly installed with the first belt pulley 818. The side wall of the chute column 85 is fixedly installed with the extrusion plate 819. The side wall of the base 1 is rotatably installed with the second rotating shaft 820. The outer wall of the second rotating shaft 820 is fixedly installed with the second belt pulley 821. The second belt pulley 821 and the first belt pulley 818 are connected by a belt for transmission. By setting the second belt pulley 821 and the first belt pulley 818, the function of transmission can be achieved. The outer wall of the second rotating shaft 820 is fixedly installed with the second cam 822. By setting the second cam 822, the extrusion plate 819 can be squeezed.

[0024] Further, the locking assembly 9 includes: a hollow block 91, an inclined block 92, a connecting column 93, a pulling plate 94, a third spring 95, and a locking rod 96. The hollow block 91 is fixedly installed on the side wall of the lower mold 7. The inclined block 92 is slidably installed on the inner wall of the hollow block 91. By providing the inclined block 92, the locking rod 96 can be limited. A connecting column 93 is fixedly installed on the side wall of the inclined block 92. By providing the connecting column 93, the inclined block 92 and the pulling plate 94 can be connected. The end point of the connecting column 93 is fixedly installed with the pulling plate 94. A third spring 95 is fixedly installed on the side wall of the pulling plate 94, and the end of the third spring 95 away from the pulling plate 94 is fixedly installed on the side wall of the lower mold 7. By providing the third spring 95, the reset function can be achieved. The locking rod 96 is fixedly installed on the side wall of the upper mold 5.

[0025] Working principle: When injection molding is required, the hydraulic device 4 is started. When the upper mold 5 moves downward, it drives the locking rod 96 to move downward. When the locking rod 96 moves downward into the hollow block 91, the locking rod 96 presses the inclined block 92. When the inclined block 92 moves outward, it drives the connecting column 93 to move outward. When the connecting column 93 moves outward, it drives the pulling plate 94 to move outward, and the third spring 95 is stretched. When the inclined block 92 enters the locking rod 96, the inclined block 92 moves inward. When the inclined block 92 moves inward, it drives the connecting column 93 to move inward. When the connecting column 93 moves inward, it drives the pulling plate 94 to move inward, and the third spring 95 resets. In this way, the upper mold 5 and the lower mold 7 can be locked, avoiding the phenomenon of offset between the upper mold 5 and the lower mold 7. At this time, the plastic is injected from the feed pipe 6.

[0026] When the injection molding is completed and the material needs to be demolded, the pulling plate 94 is pulled outward at this time, and the third spring 95 is stretched. When the pulling plate 94 moves outward, it drives the connecting column 93 to move outward. When the connecting column 93 moves outward, it drives the inclined block 92 to move outward. At this time, the hydraulic device 4 is started and the upper mold 5 moves upward. When the upper mold 5 is reset, when the pulling plate 94 is released, the third spring 95 resets. When the pulling plate 94 moves inward, it drives the connecting column 93 to move inward. When the connecting column 93 moves inward, it drives the inclined block 92 to move inward. In this way, the locking assembly 9 can be reset.

[0027] At this time, the motor 815 is started. When the motor 815 starts, it drives the first rotating shaft 816 to rotate. When the first rotating shaft 816 rotates, it drives the first cam 817 and the first pulley 818 to rotate. When the first pulley 818 rotates, it drives the second pulley 821 to rotate. When the second pulley 821 rotates, it drives the second cam 822 to rotate. When the first cam 817 rotates, it squeezes the rectangular plate 813 to move upward. When the rectangular plate 813 moves upward, it drives the sliding groove column 85 to move upward in the sliding groove plate 84. When the sliding groove column 85 moves upward, it drives the fixed block 86 to move upward. When the fixed block 86 moves upward, it drives the first cylindrical pin 87 to move upward. When the first cylindrical pin 87 moves upward, it drives the first rotating plate 88 to move upward. The first rotating plate 88 moves upward and squeezes the second spring 811 to move inward. When the second spring 811 moves inward, the telescopic rod 89 moves inward. When the fixed block 86 moves to be parallel to the second rotating plate 810 and the sliding groove column 85 continues to move upward, the second spring 811 resets. When the second spring 811 resets, it drives the sliding groove column 85 to move upward quickly. When the sliding groove column 85 moves upward quickly, it drives the extrusion plate 819 to move upward. The sliding groove column 85 moves upward quickly and squeezes the sliding column 83 to move upward, and the first spring 81 is stretched. When the sliding column 83 moves upward, it drives the ejector plate 82 to move upward. In this way, when the injection mold ejects the material, it can eject the material slowly to prevent the material from being torn. When ejecting half of the material slowly, it can quickly eject the material to ensure the working efficiency.

[0028] When the second cam 822 rotates and squeezes the extrusion plate 819, the extrusion plate 819 moves downward. When the extrusion plate 819 moves downward, it drives the sliding groove column 85 to move downward. The sliding groove column 85 moves downward in the sliding groove plate 84. When the sliding groove column 85 moves downward, it drives the fixed block 86 to move downward. When the fixed block 86 moves downward, it drives the first cylindrical pin 87 to move downward. When the first cylindrical pin 87 moves downward, it drives the first rotating plate 88 to move downward. The first rotating plate 88 moves downward and squeezes the second spring 811 to move inward. When the second spring 811 moves inward, the telescopic rod 89 moves inward. When the sliding groove column 85 continues to move downward, the second spring 811 resets, driving the sliding groove column 85 to move downward quickly. When the fixed block 86 moves to be parallel to the second rotating plate 810 and the sliding groove column 85 continues to move downward, the second spring 811 resets. When the sliding groove column 85 leaves the sliding column 83, the first spring 81 resets, and the first spring 81 reset drives the ejector plate 82 to reset. In this way, the ejector assembly 8 can be reset.

[0029] The above text generally describes the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, the modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An injection mold with a demolding protection structure, comprising a base (1), characterized in that: A fixing column (2) is fixedly installed at the top of the base (1). A first fixing plate (3) is fixedly installed at the top of the fixing column (2). A hydraulic device (4) is fixedly installed at the bottom of the first fixing plate (3). An upper mold (5) is fixedly installed at the bottom of the hydraulic device (4). A feeding pipe (6) is fixedly installed on the side wall of the upper mold (5). A lower mold (7) is fixedly installed at the top of the base (1). An ejecting assembly (8) for protecting the material is arranged inside the lower mold (7). A locking assembly (9) for locking the upper mold (5) is arranged on the side wall of the lower mold (7). The ejecting assembly (8) includes: A first spring (81), the first spring (81) is fixedly installed on the inner wall of the lower mold (7), and an ejecting plate (82) is fixedly installed at one end of the first spring (81) away from the lower mold (7); A sliding column (83), the sliding column (83) is slidably installed inside the lower mold (7), and the sliding column (83) penetrates through the base (1).

2. The injection mold with a demolding protection structure according to claim 1, characterized in that: A chute plate (84) is fixedly installed on the side wall of the base (1). A chute column (85) is slidably installed inside the chute plate (84). A fixing block (86) is fixedly installed on the side wall of the chute column (85). A first cylindrical pin (87) is fixedly installed on the side wall of the fixing block (86). A first rotating plate (88) is rotatably installed on the outer wall of the first cylindrical pin (87).

3. The injection mold with a demoulding protection structure according to claim 2, characterized in that: A telescopic rod (89) is fixedly installed on the side wall of the first rotating plate (88). A second rotating plate (810) is fixedly installed at one end of the telescopic rod (89) away from the first rotating plate (88). A second spring (811) is fixedly installed on the side wall of the second rotating plate (810), and one end of the second spring (811) away from the second rotating plate (810) is fixedly installed on the side wall of the first rotating plate (88).

4. The injection mold with a demolding protection structure according to claim 3, wherein: A second cylindrical pin (812) is rotatably installed on the inner wall of the second rotating plate (810), and the second cylindrical pin (812) is fixedly installed on the side wall of the chute plate (84). A rectangular plate (813) is fixedly installed at the bottom of the chute column (85). A second fixing plate (814) is fixedly installed on the side wall of the base (1). A motor (815) is fixedly installed on the side wall of the second fixing plate (814). A first rotating shaft (816) is fixedly installed at the output end of the motor (815). A first cam (817) is fixedly installed on the outer wall of the first rotating shaft (816). A first belt pulley (818) is fixedly installed on the side wall of the first rotating shaft (816). An extrusion plate (819) is fixedly installed on the side wall of the chute column (85). A second rotating shaft (820) is rotatably installed on the side wall of the base (1). A second belt pulley (821) is fixedly installed on the outer wall of the second rotating shaft (820). The second belt pulley (821) is in belt transmission connection with the first belt pulley (818). A second cam (822) is fixedly installed on the outer wall of the second rotating shaft (820).

5. The injection mold with a demolding protection structure according to claim 4, characterized in that: The locking assembly (9) includes: a hollow block (91), the hollow block (91) is fixedly installed on the side wall of the lower die (7), a wedge block (92) is slidably installed on the inner wall of the hollow block (91), a connecting column (93) is fixedly installed on the side wall of the wedge block (92), and a pulling plate (94) is fixedly installed at the end point of the connecting column (93).

6. The injection mold with a demoulding protection structure according to claim 5, characterized in that: A third spring (95) is fixedly installed on the side wall of the pulling plate (94), and the end of the third spring (95) far away from the pulling plate (94) is fixedly installed on the side wall of the lower die (7), and a locking rod (96) is fixedly installed on the side wall of the upper die (5).

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