Injection mold capable of automatically removing material bases

Abstract

The automatic material base removing injection mold comprises an upper mold body, a lower mold body and an injection molding head, an injection molding cavity is formed by the upper mold body and the lower mold body, an injection molding opening is formed in the injection molding cavity, and a rotating assembly is arranged on the injection molding opening and comprises a rotating disc; a driving assembly and a material pressing assembly and a material pushing assembly driven by the driving assembly are arranged on the rotating disc, the material pressing assembly comprises a material pressing hole formed in the rotating disc, the material pushing assembly comprises a material pushing hole formed in the rotating disc, and the injection molding head is used for injecting an injection molding material into the injection molding cavity through the injection molding opening after being connected with the material pushing hole; the rotating assembly is used for switching the connecting state of the material pressing hole, the material pushing hole and the injection molding opening, the driving assembly is used for driving the material pressing assembly to press injection molding materials in the injection molding opening into the injection molding cavity and driving the material pushing assembly to extrude the injection molding materials in the material pushing hole into the injection molding head at the same time, material bases of products are automatically removed, materials are recycled, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to an injection mold with automatic material removal. Background Art

[0002] Moulds are various moulds and tools used in industrial production to obtain the required products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. Injection molding is a molding method that combines injection and molding. By injecting molten injection material into the injection mould, it forms an injection moulded part that conforms to the injection mould during the cooling process, which can efficiently and quickly realize the production of complex products.

[0003] The Chinese patent with publication number CN114889061A discloses an injection mold, wherein after the upper mold and the lower mold are molded together, the injection head and the injection port are docked, and the sealing plug is controlled by a sealing mechanism, so that the sealing plug opens the injection head. After the injection head injects molten glue into the mold cavity through the injection port, the sealing mechanism causes the sealing plug to seal the injection port, so that the sealing plug is tightly plugged and flush with the inner wall of the mold cavity of the upper mold. The sealing plug presses the glue tightly, so that the hydraulic pressure of the glue in the mold cavity is appropriate. After the injection of glue in this injection mold, it is compacted by the sealing plug, so that no redundant part is formed, reducing waste. However, when the mold is used, when the sealing plug is compacted, the glue in the injection port will flow to the sealing plug and solidify, resulting in inconvenience in the use of the sealing plug. Secondly, when the mold is used, the injection efficiency is low and the process is complicated. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and to provide an injection mold with automatic material stem removal. The mold can switch the connection status between the pressure hole, the push hole and the injection port by a turntable, and separate the injection plastic that has initially solidified in the push hole from the injection plastic that has initially solidified in the injection port. Subsequently, the pressure rod presses the injection plastic in the injection port into the injection cavity, and at the same time drives the push rod to push the injection plastic in the push hole into the injection head, thereby improving the use efficiency of the injection plastic and automatically removing the material stem of the product. The mold has a simple structure and is easy to use.

[0005] The technical solutions of the present invention are as follows:

[0006] An injection mold with automatic material stem removal comprises an upper mold, a lower mold and an injection head, the upper mold and the lower mold form an injection cavity, the injection cavity is provided with an injection port, the injection port is provided with a rotating component, the rotating component comprises a turntable, the turntable is provided with a driving component and a pressing component and a pushing component driven by the driving component, the pressing component comprises a pressing hole provided on the turntable, the pushing component comprises a pushing hole provided on the turntable, the injection head is used to connect with the pushing hole and then inject the injection material into the injection cavity through the injection port, the rotating component is used to switch the connection state of the pressing hole, the pushing hole and the injection port, the driving component is used to drive the pressing component to press the injection material in the injection port into the injection cavity, and at the same time drive the pushing component to squeeze the injection material in the pushing hole into the injection head.

[0007] Preferably, the rotating assembly also includes a support plate fixedly mounted on the upper mold, a servo motor fixedly mounted on the support plate, the turntable is rotatably mounted on the support plate, the output shaft of the servo motor is connected to the turntable via a belt, and the bottom surface of the turntable fits the top surface of the upper mold.

[0008] Preferably, the driving assembly includes a motor fixedly mounted on a turntable, a screw fixedly mounted on an output shaft of the motor, a nut rotatably mounted on the screw, a cylinder fixedly mounted on the turntable, a piston slidably mounted in the cylinder, and a rectangular rod fixedly mounted on the piston, wherein the rectangular rod is fixedly connected to the nut.

[0009] As a preference, the pressing assembly also includes a pressing rod slidably disposed in the pressing hole, a spring fixedly connected between the pressing rod and the pressing hole, and a first connecting tube fixedly connected between the cylinder and the pressing hole, and the pressing rod cooperates with the injection port.

[0010] As a preferred embodiment, the pushing assembly also includes a through groove opened in the upper mold, a pushing rod slidably arranged in the through groove, a spring fixedly connected between the pushing rod and the through groove, a heating wire fixedly arranged on the pushing hole, a second connecting tube fixedly connected to the cylinder body, and a third connecting tube fixedly connected to the through groove; the pushing rod cooperates with the pushing hole, and the second connecting tube cooperates with the third connecting tube.

[0011] Preferably, a baffle plate and a bellows fixedly arranged on the baffle plate are fixedly arranged on the upper mold, the bottom surface of the baffle plate matches the top surface of the push hole, and the bellows are connected with the push hole and the injection head.

[0012] As a preference, cooling pipes are provided in both the upper mold and the lower mold.

[0013] As a preferred embodiment, the pressing rod and the pushing rod are both made of steel.

[0014] The beneficial effects of the present invention are

[0015] 1. The present invention is provided with a rotating component and a pressing component. The injection head injects the injection plastic into the injection cavity. After the injection plastic is semi-solidified, the turntable rotates 180 degrees under the drive of the servo motor. During the rotation, the turntable separates the injection plastic in the push hole from the injection plastic in the injection port. Then the motor drives the rectangular rod and the piston to descend, and the gas in the cylinder is injected into the pressing hole, driving the pressing rod to descend, and the injection plastic in the injection port is squeezed into the injection cavity. The bottom surface of the pressing rod is flush with the bottom surface of the injection port, so that the product has no material stem after molding, eliminating the step of manual removal of the material stem in the later stage, thereby improving product production efficiency.

[0016] 2. The present invention is provided with a pusher assembly, and the gas cylinder is injected into the through groove through the second connecting pipe and the third connecting pipe, driving the pusher rod to rise and squeeze the injection plastic in the pusher hole into the injection molding head through the bellows, thereby realizing the recycling of the injection plastic and saving raw materials.

[0017] In summary, the present invention has the advantages of good injection molding effect and strong practicability, and is suitable for the technical field of injection molding processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of an injection mold with automatic material removal;

[0020] Figure 2 It is a schematic diagram of the structure of the driving component and the rotating component;

[0021] Figure 3 is a schematic diagram of the structure of the first connecting pipe and the second connecting pipe;

[0022] Figure 4 This is a schematic diagram of the state when the injection molding is performed after the injection molding head is connected to the push hole;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0025] Figure 7 This is a schematic diagram of the state when the motor drives the piston to descend and drives the push rod and the press rod to work after the turntable rotates;

[0026] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0027] Fig. 9 for Figure 7 Enlarged view of point D in the middle;

[0028] Figure numerals: 1 upper mold, 2 lower mold, 3 injection head, 4 injection cavity, 5 injection port, 6 rotating assembly, 61 turntable, 62 support plate, 64 servo motor, 7 driving assembly, 71 motor, 72 screw rod, 73 nut, 74 cylinder, 75 piston, 76 rectangular rod, 8 pressing assembly, 81 pressing hole, 82 pressing rod, 83 first connecting pipe, 9 pushing assembly, 91 pushing hole, 92 through groove, 93 pushing rod, 94 heating wire, 95 second connecting pipe, 96 third connecting pipe, 10 baffle plate, 11 bellows, 12 cooling pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0030] Embodiment 1

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1 to 9 As shown, an injection mold with automatic material removal includes an upper mold 1, a lower mold 2 and an injection head 3. The upper mold 1 and the lower mold 2 form an injection cavity 4. The injection cavity 4 is provided with an injection port 5. The injection port 5 is provided with a rotating component 6. The rotating component 6 includes a turntable 61. The turntable 61 is provided with a driving component 7 and a pressing component 8 and a pushing component 9 driven by the driving component 7. The pressing component 8 includes a pressing hole 81 opened on the turntable 61, and the pushing component 9 includes a pushing hole 91 opened on the turntable 61. The injection head 3 is used to connect with the pushing hole 91 and then inject the injection plastic into the injection cavity 4 through the injection port 5. The rotating component 6 is used to switch the connection state of the pressing hole 81, the pushing hole 91 and the injection port 5. The driving component 7 is used to drive the pressing component 8 to press the injection plastic in the injection port 5 into the injection cavity 4, and at the same time drive the pushing component 9 to squeeze the injection plastic in the pushing hole 91 into the injection head 3.

[0033] like Figures 4 to 9As shown, the rotating assembly 6 also includes a support plate 62 fixedly arranged on the upper mold 1, a servo motor 64 fixedly arranged on the support plate 62, a turntable 61 is rotatably arranged on the support plate 62, an output shaft of the servo motor 64 is connected to the turntable 61 through a belt, and the bottom surface of the turntable 61 is in contact with the top surface of the upper mold 1, wherein the initial position of the turntable 61 is set so that the push hole 91 is connected to the injection port 5, and a manipulator is arranged on the injection head 3 so that the injection head 3 can be connected to or disconnected from the push hole 91. When in use, After the injection head 3 is connected to the push hole 91, the injection plastic is injected into the injection cavity 4 through the injection port 5. When the injection is completed, the injection head 3 stops injecting the material. After the injection plastic is semi-solidified, the turntable 61 rotates 180° driven by the servo motor 64. During the rotation, the turntable 61 separates the injection plastic in the push hole 91 from the injection plastic in the injection port 5, and at the same time connects the pressure hole 81 with the injection port 5. The excess injection plastic is taken away by the rotation of the turntable 61, and is recycled by heating to save raw materials.

[0034] like Figures 7 to 9 As shown, the driving assembly 7 includes a motor 71 fixedly arranged on the turntable 61, a screw rod 72 fixedly arranged on the output shaft of the motor 71, a nut 73 rotatably arranged on the screw rod 72, a cylinder 74 fixedly arranged on the turntable 61, a piston 75 slidably arranged in the cylinder 74, and a rectangular rod 76 fixedly arranged on the piston 75. The rectangular rod 76 is fixedly connected to the nut 73. When in use, after the turntable rotates 180°, the motor 71 rotates to drive the screw rod 72 to rotate, driving the nut 73, the rectangular rod 76 and the piston 75 to descend, and the gas in the cylinder 74 is squeezed into the pressing assembly 8 and the pushing assembly 9, thereby playing a linkage role.

[0035] like Figures 7 to 9 As shown, the pressing assembly 8 also includes a pressing rod 82 slidably arranged in the pressing hole 81, a spring fixedly connected between the pressing rod 82 and the pressing hole 81, and a first connecting tube 83 fixedly connected between the cylinder 74 and the pressing hole 81. The pressing rod 82 cooperates with the injection port 5. When in use, when the piston 75 descends, gas is injected into the pressing hole 81 from the first connecting tube 83, driving the pressing rod 82 to descend, squeezing the injection plastic in the injection port 5 into the injection cavity 4, and the bottom surface of the pressing rod 82 is flush with the bottom surface of the injection port 5, so that there is no material stem after the product is formed, eliminating the step of manually removing the material stem in the later stage, thereby improving product production efficiency.

[0036] like Figures 7 to 9As shown, the pusher assembly 9 also includes a through slot 92 opened in the upper mold 1, a pusher rod 93 slidably arranged in the through slot 92, a spring fixedly connected between the pusher rod 93 and the through slot 92, a heating wire 94 fixedly arranged on the pusher hole 91, a second connecting pipe 95 fixedly connected between the cylinder 74 and the pusher hole 91, and a third connecting pipe 96 fixedly connected to the through slot 92. The pusher rod 93 cooperates with the pusher hole 91, and the second connecting pipe 95 cooperates with the third connecting pipe 96. When in use, after the turntable 61 rotates 180°, the second connecting pipe 95 and the third connecting pipe 96 are 6, when the gas flows into the pressing hole 81, it flows into the through groove 92 through the second connecting pipe 95 and the third connecting pipe 96, thereby pushing the push rod 93 to move upward, and the injection plastic in the pushing hole 91 is re-injected into the injection head 3, and the heating wire 94 heat-melts the injection plastic to ensure that the injection plastic is in a hot-melt state; when the product is formed, the motor 71 drives the screw rod 72 to rotate in the opposite direction, so that the nut 73, the rectangular rod 76, and the piston 75 are reset. When the gas is drawn into the cylinder 74, the pressing rod 82 and the push rod 93 are reset under the action of the spring, preparing for the next pressing and pushing.

[0037] like Figures 7 to 9 As shown, a baffle plate 10 and a bellows 11 fixedly arranged on the baffle plate 10 are fixedly arranged on the upper mold 1. The bottom surface of the baffle plate 10 matches the top surface of the push hole 91. The bellows 11 are connected with the push hole 91 and the injection head 3. When in use, after the turntable 61 rotates 180°, the baffle plate 10 covers the push hole 91, and then the injection plastic is squeezed into the bellows 11 under the action of the push rod 93, and re-injected into the injection head 3 to achieve recycling.

[0038] like Figure 4 As shown, cooling pipes 12 are provided in both the upper mold 1 and the lower mold 2 to cool the injection cavity 4 .

[0039] Embodiment 2

[0040] like Figure 4 As shown, the components that are the same as or corresponding to those in the first embodiment are marked with the corresponding figure marks in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The difference between the second embodiment and the first embodiment is that the pressing rod 82 and the pushing rod 93 are both made of steel.

[0041] Here, in this embodiment, the pressing rod 82 and the pushing rod 93 are both made of steel, thereby increasing the service life of the pressing rod 77 and the pushing rod 87 .

[0042] Working process

[0043] After the injection head 3 is connected to the push hole 91, the injection plastic is injected into the injection cavity 4 through the injection port 5. When the injection is completed, the injection head 3 stops injecting. After the injection plastic is semi-solidified, the turntable 61 rotates 180° driven by the servo motor 64. During the rotation, the turntable 61 separates the injection plastic in the push hole 91 from the injection plastic in the injection port 5, and at the same time connects the pressure hole 81 with the injection port 5. The bottom surface of the baffle plate 10 fits with the top surface of the push hole 91, and the second connecting pipe 95 is connected to the third connecting pipe 96. Subsequently, the motor 71 rotates to drive the screw rod 72 to rotate, driving the nut 73, the rectangular rod 76 and the piston 75 to descend, and the gas is injected into the pressure hole 81 from the first connecting pipe 83, driving the pressure rod 82 to descend. The injection plastic in the injection port 5 is squeezed into the injection cavity 4, and the bottom surface of the push rod 82 is flush with the bottom surface of the injection port 5, so that there is no material stem after the product is formed, which saves the step of manually removing the material stem in the later stage and improves the product production efficiency. At the same time, the gas flows into the through groove 92 through the second connecting pipe 95 and the third connecting pipe 96, thereby pushing the push rod 93 to move upward, and the injection plastic in the push hole 91 is re-injected into the injection head 3 through the bellows 11; when the product is formed, the motor 71 drives the screw rod 72 to rotate in the opposite direction, so that the nut 73, the rectangular rod 76, and the piston 75 are reset. When the gas is drawn into the cylinder 74, the push rod 82 and the push rod 93 are reset under the action of the spring, preparing for the next pressing and pushing of the material, realizing the recycling of the injection plastic and saving raw materials.

[0044] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0045] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0046] The above description in conjunction with the accompanying drawings is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment. It should be pointed out that for those skilled in the art, various modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the scope of protection of the present invention and will not affect the effect and practicality of the implementation of the present invention.

Claims

1. An injection mold with automatic material removal, comprising an upper mold (1), a lower mold (2) and an injection head (3), characterized in that: The upper mold (1) and the lower mold (2) form an injection cavity (4), the injection cavity (4) is provided with an injection port (5), the injection port (5) is provided with a rotating assembly (6), the rotating assembly (6) comprises a turntable (61), the turntable (61) is provided with a driving assembly (7) and a material pressing assembly (8) and a material pushing assembly (9) driven by the driving assembly (7), the material pressing assembly (8) comprises a material pressing hole (81) provided on the turntable (61), the material pushing assembly (9) comprises a material pressing hole (81) provided on the turntable (61), and the material pushing assembly (9) comprises a material pressing hole (81) provided on the turntable (61). The push hole (91) on the disk (61) is used for the injection head (3) to be connected with the push hole (91) and then inject the injection plastic into the injection cavity (4) through the injection port (5); the rotating assembly (6) is used for switching the connection state between the pressing hole (81), the push hole (91) and the injection port (5); the driving assembly (7) is used for driving the pressing assembly (8) to press the injection plastic in the injection port (5) into the injection cavity (4) and at the same time drive the push assembly (9) to squeeze the injection plastic in the push hole (91) into the injection head (3).

2. The automatic stalk removal injection mold according to claim 1, characterized in that: The rotating assembly (6) further comprises a support plate (62) fixedly mounted on the upper mold (1), and a servo motor (64) fixedly mounted on the support plate (62); the turntable (61) is rotatably mounted on the support plate (62); an output shaft of the servo motor (64) is connected to the turntable (61) via a belt; and a bottom surface of the turntable (61) is in contact with a top surface of the upper mold (1).

3. The automatic stalk removal injection mold according to claim 1, characterized in that: The driving assembly (7) comprises a motor (71) fixedly arranged on a rotating disk (61), a screw rod (72) fixedly arranged on an output shaft of the motor (71), a nut (73) rotatably arranged on the screw rod (72), a cylinder (74) fixedly arranged on the rotating disk (61), a piston (75) slidably arranged in the cylinder (74), and a rectangular rod (76) fixedly arranged on the piston (75), wherein the rectangular rod (76) is fixedly connected to the nut (73).

4. The automatic stalk removal injection mold according to claim 3, characterized in that: The pressing assembly (8) further comprises a pressing rod (82) slidably disposed in the pressing hole (81), a spring fixedly connected between the pressing rod (82) and the pressing hole (81), and a first connecting tube (83) fixedly connected between the cylinder (74) and the pressing hole (81); the pressing rod (82) cooperates with the injection port (5).

5. The automatic stalk removal injection mold according to claim 3, characterized in that: The pusher assembly (9) also includes a through groove (92) provided in the upper mold (1), a pusher rod (93) slidably arranged in the through groove (92), a spring fixedly connected between the pusher rod (93) and the through groove (92), a heating wire (94) fixedly arranged on the pusher hole (91), a second connecting tube (95) fixedly connected to the cylinder (74), and a third connecting tube (96) fixedly connected to the through groove (92); the pusher rod (93) cooperates with the pusher hole (91), and the second connecting tube (95) cooperates with the third connecting tube (96).

6. The automatic stalk removal injection mold according to claim 1, characterized in that: The upper mold (1) is fixedly provided with a shielding plate (10) and a bellows (11) fixedly provided on the shielding plate (10); the bottom surface of the shielding plate (10) matches the top surface of the push hole (91); and the bellows (11) is connected to the push hole (91) and the injection head (3).

7. The automatic stalk removal injection mold according to claim 1, characterized in that: Cooling pipes (12) are provided in both the upper mold (1) and the lower mold (2).

8. The automatic stalk removal injection mold according to claim 5, characterized in that: The pressing rod (82) and the pushing rod (93) are both made of steel.

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