Injection mold convenient to demold

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold convenient to demold, which comprises a mold frame and a mold base arranged at the middle end in the mold frame. A mold plate is arranged above the mold base, injection molding cavities are formed in the upper end and the lower end of the mold base, demolding ejection plates are arranged in the injection molding cavities, an empty groove is formed in the middle of the mold base, two push plates distributed up and down are arranged in the empty groove, return springs are connected between the push plates and the inner wall of the empty groove, two ejection rods are connected between the demolding ejection plates and the adjacent push plates, and the ejection rods penetrate through the mold base in a sliding mode. According to the utility model, the mold base is overturned up and down by 180 degrees, so that a plastic product in the injection molding cavity can be overturned downwards conveniently, and then the plastic product in the injection molding cavity below can be automatically ejected and demolded through the demolding top plate, so that the demolding work is more automatic and convenient, manual demolding is not needed, and the fatigue degree of manual demolding is effectively reduced.

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 molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. They are also a processing method used in mass production of parts, primarily in the industrial sector. The injection molding process involves injecting heated, molten material into the mold cavity under high pressure. After cooling and solidification, the resulting molded product is formed. These molds are categorized into thermosetting plastic molds and thermoplastic plastic molds based on their molding characteristics.

[0003] In the prior art, after a plastic product is injection molded in an injection molding cavity, it needs to be demolded. If the demolding is done manually, it is not only inconvenient but also increases the labor fatigue. In addition, during the demolding process, the existing injection mold cannot be used to injection mold the next plastic product in time. Since the demolding process delays the injection molding time of the next plastic product, the injection molding efficiency of the existing injection mold is poor. Therefore, it is necessary to design an injection mold that is easy to demold and has high injection molding efficiency. Utility Model Content

[0004] The utility model provides an injection mold that is easy to demould, which is beneficial to improving the convenience of demoulding and the efficiency of injection molding.

[0005] In order to solve the existing technical problems, the utility model discloses an injection mold that is easy to demould, comprising a mold frame and a mold base, wherein the mold base is arranged at the middle end of the mold frame;

[0006] A template is provided above the mold base, and injection cavities are provided at the upper and lower ends of the mold base, demoulding top plates are provided in the injection cavities, an empty slot is provided in the middle of the mold base, two push plates distributed up and down are provided in the empty slot, a return spring is connected between the push plates and the inner wall of the empty slot, two ejector rods are connected between the demoulding top plates and the adjacent push plates, the ejector rods slide through the mold base, electromagnets are fixed at the upper and lower ends of the inner wall of the empty slot, magnetic plates are provided on the inner sides of the electromagnets, and the magnetic plates are connected to one side of the adjacent push plates, and a switch opening and closing component is provided on the left side of the mold base;

[0007] A water inlet shaft pipe is fixed to the left end of the mold base, and the water inlet shaft pipe rotates and passes through the left side of the mold frame. A water outlet shaft pipe is fixed to the right end of the mold base, and the water outlet shaft pipe rotates and passes through the right side of the mold frame. A flip drive assembly is provided on the right side of the mold frame;

[0008] The upper and lower ends of the mold base are both provided with cooling cavities wrapped around the injection cavity, and the left end of the mold frame is provided with a cold water circulation machine.

[0009] Furthermore, a hydraulic cylinder is fixed at the top end of the mold frame, and the upper end of the template is connected to the power end of the hydraulic cylinder.

[0010] Furthermore, the switch opening and closing assembly includes a proximity switch and a proximity plate. The proximity switches are provided in two and are installed one by one at the upper and lower ends of the left side of the mold base. The proximity plate is provided at the lower left side of the mold base and is connected to the left wall inside the mold frame.

[0011] Furthermore, the flipping drive assembly includes a PLC controller, a brake motor, a main gear and a sub-gear. The PLC controller and the brake motor are fixed on the right side of the mold frame. The main gear is connected to the power end of the brake motor. The sub-gear is fixedly sleeved on the outer periphery of the water outlet shaft pipe, and the sub-gear is engaged with the main gear.

[0012] Furthermore, a material receiving concave box is provided below the mold base.

[0013] Furthermore, the left end of the water inlet shaft pipe is rotatably connected and communicated with the cold water outlet of the cold water circulation machine, the water inlet of the cold water circulation machine is connected with a return pipe, and the right end of the water outlet shaft pipe is rotatably connected and communicated with the return pipe.

[0014] Furthermore, a water inlet channel is opened at the left end of the mold base, and the water inlet shaft pipe and the cooling cavity are both connected to the water inlet channel. A water outlet channel is opened at the right end of the mold base, and the water outlet shaft pipe and the cooling cavity are both connected to the water outlet channel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting an injection cavity at the upper and lower ends of the mold base, when the plastic product in the injection cavity needs to be demolded, the mold base is flipped up and down 180 degrees, so that the plastic product in the injection cavity can be turned downward. Then, the demolding top plate can automatically eject the plastic product in the lower injection cavity and demold it. The demolding work is automatic and convenient, and no manual demolding is required, which effectively reduces the fatigue of manual demolding.

[0017] 2. When the plastic product in the lower injection cavity is ejected and demolded by the demolding top plate, the plastic product can continue to be injection molded in the upper injection cavity at the same time. Therefore, during the demolding process, injection molding can still be carried out, saving the time wasted in re-injection molding after demolding, thereby effectively improving the injection molding efficiency of the injection mold;

[0018] 3. By setting up a cold water circulation machine to supply cold water into the cooling chamber, it is beneficial to quickly cool the plastic product in the injection molding cavity, thereby helping to better improve the efficiency of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the mold base of the present utility model;

[0022] Figure 4 It is a schematic diagram of the overall working structure of the utility model.

[0023] Figure 1-4 Middle: mold frame 1, mold base 2, template 3, hydraulic cylinder 4, PLC controller 5, brake motor 6, main gear 7, water outlet shaft pipe 8, sub-gear 9, material receiving concave box 10, cold water circulation machine 11, return pipe 12, proximity switch 13, proximity plate 14, water inlet shaft pipe 15, injection cavity 16, demoulding top plate 17, electromagnet 18, push plate 19, return spring 20, magnetic plate 21, water inlet channel 22, cooling cavity 23, water outlet channel 24, empty slot 25, ejector 26. DETAILED DESCRIPTION

[0024] Injection molds that are easy to demould:

[0025] like Figure 1-4 As shown, in this embodiment, it includes a mold frame 1 and a mold base 2, the mold base 2 is arranged at the middle end of the mold frame 1, and the upper and lower ends of the mold base 2 are provided with injection cavities 16, and the injection cavities 16 are provided in the injection cavities 16. A demoulding top plate 17 is provided in the middle of the mold base 2, and two push plates 19 distributed up and down are provided in the empty groove 25. A return spring 20 is connected between the push plates 19 and the inner wall of the empty groove 25, and two ejector rods 26 are connected between the demoulding top plates 17 and the adjacent push plates 19. The ejector rods 26 slide through the mold base 2, and the upper and lower ends of the inner wall of the empty groove 25 are fixed with electromagnets 18, and the inner sides of the electromagnets 18 are provided with magnetic plates 21, and the magnetic plates 21 are connected to one side of the adjacent push plates 19. A switch opening and closing component is provided on the left side of the mold base 2, and the switch opening and closing component includes a proximity switch 13 and a proximity plate 14. There are two proximity switches 13, which are installed one by one at the upper and lower ends of the left side of the mold base 2. The proximity plate 14 is provided at the lower left side of the mold base 2, and the proximity plate 14 is connected to the inner left wall of the mold frame 1. A water inlet shaft pipe 15 is fixed to the left end of the mold base 2, and the water inlet shaft pipe 15 rotates through the left side of the mold frame 1. A water outlet shaft pipe 8 is fixed to the right end of the mold base 2, and the water outlet shaft pipe 8 rotates through the right side of the mold frame 1. A flip drive assembly is provided on the right side of the mold frame 1, and the flip drive assembly includes a PLC controller 5, a brake motor 6, a main gear 7 and a sub-gear 9. The PLC controller 5 and the brake motor 6 are both fixed to the right side of the mold frame 1, the main gear 7 is connected to the power end of the brake motor 6, the sub-gear 9 is fixedly sleeved on the outer periphery of the water outlet shaft pipe 8, and the sub-gear 9 is engaged with the main gear 7. A material receiving concave box 10 is provided under the mold base 2.

[0026] When the finished plastic product in the upper injection molding cavity 16 is injection molded and the plastic product in the injection molding cavity 16 needs to be demolded, the PLC controller 5 is set to be connected to the brake motor 6 signal, and the PLC controller 5 controls the brake motor 6 to work. The brake motor 6 is set to drive the main gear 7 to rotate 180 degrees and stop each time it works. Therefore, when the main gear 7 rotates, it will drive the sub-gear 9, the water outlet shaft pipe 8, the mold base 2 and the water inlet shaft pipe 15 to rotate 180 degrees together. Therefore, the mold base 2 can be easily flipped up and down 180 degrees, so that the upper and lower injection molding cavities 16 can be easily swapped up and down. At this time, the injection molding cavity 16 with the plastic product that has been injection molded is open downward, and the proximity switches 13 are all set to the adjacent electric Under the premise that the magnets 18 are connected in series, when the mold base 2 is flipped up and down, the proximity switch 13 at the lower left end of the mold base 2 just senses the proximity plate 14, so the proximity switch 13 is automatically started, and then the proximity switch 13 will control the corresponding electromagnet 18 to be energized and work, and the electromagnet 18 below will attract the magnetic plate 21 through magnetic force. When the magnetic plate 21 moves down, it will drive the corresponding push plate 19, the ejector rod 26 and the demoulding top plate 17 to move downward. At the same time, the magnetic plate 21 will compress the return spring 20, so when the demoulding top plate 17 moves down, it will automatically push the plastic product in the injection cavity 16 below out of the mold, and the demoulded plastic product will automatically fall into the receiving concave box 10 for collection. In summary, the demoulding work is more automatic and convenient, and there is no need for manual demoulding, which effectively reduces the fatigue of manual demoulding.

[0027] like Figure 3 、 4 As shown, in this embodiment, a template 3 is provided above the mold base 2, a hydraulic cylinder 4 is fixed to the top end of the mold frame 1, and the upper end of the template 3 is connected to the power end of the hydraulic cylinder 4.

[0028] When the proximity switch 13 at the lower left end of the mold base 2 senses that the proximity plate 14 is activated, the proximity switch 13 at the upper left end of the mold base 2 cannot sense the proximity plate 14, so the upper electromagnet 18 will not attract the corresponding magnetic plate 21 through magnetic force, and the rebound force of the upper return spring 20 will drive the corresponding push plate 19, the ejector rod 26 and the demoulding top plate 17 to move and reset, that is, the upper demoulding top plate 17 is stored in the injection cavity 16. When the plastic product in the injection cavity 16 below the mold base 2 is being demoulded, At the same time, the template 3 is driven downward by the operation of the hydraulic cylinder 4 until the template 3 is matched with the mold base 2. Under the premise that there is an injection channel on the template 3, the hot-melt plastic can be continuously injected into the injection cavity 16 above the mold base 2 through the injection channel on the template 3. Therefore, the plastic product can continue to be injection-molded in the upper injection cavity 16. Therefore, during the demoulding process, injection molding can also be carried out, saving the time wasted in injection molding after demoulding, thereby effectively improving the injection molding efficiency of the injection mold.

[0029] like Figure 3 、 4 As shown, in this embodiment, the upper and lower ends of the mold base 2 are both provided with a cooling cavity 23 wrapped around the injection cavity 16, and the left end of the mold frame 1 is provided with a cold water circulation machine 11, and the left end of the water inlet shaft pipe 15 is rotatably connected and communicated with the cold water outlet of the cold water circulation machine 11, and the water inlet of the cold water circulation machine 11 is connected with a return pipe 12, and the right end of the water outlet shaft pipe 8 is rotatably connected and communicated with the return pipe 12, and a water inlet channel 22 is opened at the left end of the mold base 2, and the water inlet shaft pipe 15 and the cooling cavity 23 are both communicated with the water inlet channel 22, and a water outlet channel 24 is opened at the right end of the mold base 2, and the water outlet shaft pipe 8 and the cooling cavity 23 are both communicated with the water outlet channel 24.

[0030] When the plastic product is injection molded in the injection cavity 16, in order to improve the efficiency of cooling and molding the finished plastic product, cold water is injected into the water inlet shaft pipe 15, the water inlet channel 22 and the cooling cavity 23 through the cold water circulation machine 11, and then the plastic product is cooled by heat exchange with the cold water, which is conducive to quickly cooling and molding the plastic product in the injection cavity 16, and is conducive to better improving the efficiency of injection molding. In addition, the water after heat exchange will be discharged into the cold water circulation machine 11 through the water outlet channel 24, the water outlet shaft pipe 8 and the return pipe 12 for circulation and cooling, thereby achieving the effect of water cooling circulation cooling for the plastic product.

Claims

1. An injection mold for easy demoulding, comprising a mold frame (1) and a mold base (2), wherein the mold base (2) is arranged at the middle end of the mold frame (1), and is characterized in that: A template (3) is provided above the mold base (2), and an injection cavity (16) is provided at the upper and lower ends of the mold base (2), and a demoulding top plate (17) is provided in the injection cavity (16). A slot (25) is provided in the middle of the mold base (2), and two push plates (19) distributed up and down are provided in the slot (25), and a return spring (20) is connected between the push plates (19) and the inner wall of the slot (25), and two push rods (26) are connected between the demoulding top plate (17) and the adjacent push plates (19), and the push rods (26) slide through the mold base (2), and electromagnets (18) are fixed at the upper and lower ends of the inner wall of the slot (25), and magnetic plates (21) are provided on the inner side of the electromagnet (18), and the magnetic plates (21) are connected to one side of the adjacent push plates (19). A switch opening and closing component is provided on the left side of the mold base (2); A water inlet shaft pipe (15) is fixed to the left end of the mold base (2), and the water inlet shaft pipe (15) rotates and passes through the left side of the mold frame (1); a water outlet shaft pipe (8) is fixed to the right end of the mold base (2), and the water outlet shaft pipe (8) rotates and passes through the right side of the mold frame (1); a turning drive assembly is provided on the right side of the mold frame (1); The upper and lower ends of the mold base (2) are both provided with cooling cavities (23) wrapped around the injection cavity (16), and the left end of the mold frame (1) is provided with a cold water circulation machine (11).

2. The injection mold for easy demoulding according to claim 1, characterized in that: A hydraulic cylinder (4) is fixed at the top end of the mold frame (1), and the upper end of the template (3) is connected to the power end of the hydraulic cylinder (4).

3. The injection mold for easy demoulding according to claim 1, characterized in that: The switch opening and closing assembly comprises a proximity switch (13) and a proximity plate (14). The proximity switches (13) are provided in two and are installed one by one at the upper and lower ends of the left side of the mold base (2). The proximity plate (14) is provided at the lower left side of the mold base (2) and is connected to the inner left wall of the mold frame (1).

4. The injection mold for easy demoulding according to claim 1, characterized in that: The flip drive assembly comprises a PLC controller (5), a brake motor (6), a main gear (7) and a sub-gear (9); the PLC controller (5) and the brake motor (6) are both fixed to the right side of the mold frame (1); the main gear (7) is connected to the power end of the brake motor (6); the sub-gear (9) is fixedly sleeved on the periphery of the water outlet shaft pipe (8), and the sub-gear (9) is meshed with the main gear (7).

5. The injection mold for easy demoulding according to claim 1, characterized in that: A material receiving concave box (10) is provided below the mold base (2).

6. The injection mold for easy demoulding according to claim 1, characterized in that: The left end of the water inlet shaft pipe (15) is rotatably connected to and communicates with the cold water outlet of the cold water circulation machine (11), the water inlet of the cold water circulation machine (11) is connected to a return pipe (12), and the right end of the water outlet shaft pipe (8) is rotatably connected to and communicates with the return pipe (12).

7. The injection mold for easy demoulding according to claim 1, characterized in that: A water inlet channel (22) is provided at the left end of the mold base (2), and the water inlet shaft pipe (15) and the cooling cavity (23) are both connected to the water inlet channel (22); a water outlet channel (24) is provided at the right end of the mold base (2), and the water outlet shaft pipe (8) and the cooling cavity (23) are both connected to the water outlet channel (24).

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