An injection mold with automatic material removal

Abstract

The present invention relates to an injection mold with automatic material stem removal, comprising 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 plastic 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 plastic in the injection port into the injection cavity, and at the same time drive the pushing component to squeeze the injection plastic in the pushing hole into the injection head, so as to automatically remove the material stem of the product, recycle the material, and be easy to use.

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] Molds are various molds and tools used in industrial production to obtain the desired products through methods such as injection molding, blow molding, extrusion, die casting or forging, smelting, and stamping. Among them, injection molding is a molding method that combines injection and molding. By injecting molten injection molding material into the injection mold, it forms an injection molded part that conforms to the injection mold 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. After the upper mold and the lower mold are closed, the glue injection head and the glue injection port are docked. The sealing plug is controlled by a sealing mechanism, so that the sealing plug opens the glue injection head. After the glue injection head injects molten glue into the mold cavity through the glue injection port, the sealing mechanism causes the sealing plug to seal the glue 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 glue is injected into 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 onto the sealing plug and solidify, making the sealing plug inconvenient to use. 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 shortcomings of the existing technology and provide an injection mold with automatic material stem removal. By switching the connection status between the pressure hole, the push hole and the injection port through a turntable, the injection plastic that has been preliminarily solidified in the push hole is separated from the injection plastic that has been preliminarily solidified in the injection port. Subsequently, the pressure rod presses the injection plastic in the injection port into the injection cavity while driving the push rod to push the injection plastic in the push hole into the injection head, thereby improving the utilization efficiency of the injection plastic and automatically removing the material stem of the product. The structure is simple and easy to use.

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

[0006] An injection mold with automatic material removal, comprising an upper mold, a lower mold and an injection head, the upper mold and the lower mold forming an injection cavity, the injection cavity being provided with an injection port, the injection port being provided with a rotating assembly, the rotating assembly comprising a turntable, the turntable being provided with a driving assembly and a pressing assembly and a pushing assembly driven by the driving assembly, the pressing assembly comprising a pressing hole provided on the turntable, the pushing assembly comprising a pushing hole provided on the turntable, the injection head being used to inject the injection plastic into the injection cavity through the injection port after being connected to the pushing hole, the rotating assembly being used to switch the connection state of the pressing hole, the pushing hole and the injection port, the driving assembly being used to drive the pressing assembly to press the injection plastic in the injection port into the injection cavity, while driving the pushing assembly to squeeze the injection plastic in the pushing hole into the injection head.

[0007] As a preference, the rotating assembly also includes a support plate fixedly arranged on the upper mold, a servo motor fixedly arranged on the support plate, the turntable is rotatably arranged on the support plate, the output shaft of the servo motor is connected to the turntable through a belt, and the bottom surface of the turntable is in contact with the top surface of the upper mold.

[0008] As a preference, the drive assembly includes a motor fixedly arranged on a turntable, a screw fixedly arranged on an output shaft of the motor, a nut rotatably arranged on the screw, a cylinder fixedly arranged on the turntable, a piston slidably arranged in the cylinder, and a rectangular rod fixedly arranged 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 arranged 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 preference, 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, 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] As a preference, a baffle plate and a bellows fixedly arranged on the baffle plate are fixedly provided 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 preference, 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 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.

[0016] 2. The present invention is provided with a pusher assembly, and the air 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 practicality, and is suitable for the field of injection molding processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[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] Figure 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, 11 bellows, 12 cooling pipe. DETAILED DESCRIPTION

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

[0030] Example 1

[0031] The following describes embodiments of the present invention in detail, 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 are not to be construed as limiting the present invention.

[0032] like Figures 1 to 9 As shown, an injection mold with automatic material removal comprises 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 comprises 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 comprises a pressing hole 81 provided on the turntable 61, the pushing component 9 comprises a pushing hole 91 provided 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 rotatably arranged on the support plate 62, and an output shaft of the servo motor 64 is connected to the turntable 61 through a belt. 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 to the push hole 91 connected to the injection port 5, and a manipulator is provided 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 recycled by heating, saving 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 squeezing the gas in the cylinder 74 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. During 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 provided 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 degrees, the second connecting pipe 95 and the third connecting pipe 96 are in contact with each other. 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. At the same time, 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 provided on the upper mold 1. The bottom surface of the baffle plate 10 cooperates with 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, when 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] Example 2

[0040] like Figure 4 As shown, the components that are the same as or corresponding to those in Example 1 are marked with the corresponding figure marks in Example 1. For the sake of simplicity, only the differences from Example 1 are described below. The difference between Example 2 and Example 1 is that the pressing rod 82 and the pushing rod 93 are both set to be made of steel.

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

[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 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 bottom surface of the baffle 10 fits 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 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, which eliminates 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 re-injecting the injection plastic in the push hole 91 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, rectangular rod 76, and 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, realizing the recycling of the injection plastic and saving raw materials.

[0044] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0045] Of course, in this 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. These 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 automatic stalk removal injection mold, 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) includes a turntable (61), the turntable (61) is provided with a driving assembly (7) and a pressing assembly (8) and a pushing assembly (9) driven by the driving assembly (7), the driving assembly (7) includes a motor (71) fixedly provided on the turntable (61), a screw (72) fixedly provided on the output shaft of the motor (71), a nut (73) rotatably provided on the screw (72), a barrel (73) fixedly provided on the turntable (61), and a screw (74) fixedly provided on the output shaft of the motor (71). 4), a piston (75) slidably arranged in the cylinder (74), a rectangular rod (76) fixedly arranged on the piston (75), the rectangular rod (76) being fixedly connected to the nut (73), the pressing assembly (8) comprising a pressing hole (81) provided on the turntable (61), 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), a first connecting pipe (83) fixedly connected between the cylinder (74) and the pressing hole (81), the pressing rod (82) being matched with the injection port (5), the pushing assembly (9) comprising a pushing hole ( 91), a through groove (92) provided in the upper mold (1), a push rod (93) slidably arranged in the through groove (92), a spring fixedly connected between the push rod (93) and the through groove (92), a heating wire (94) fixedly arranged on the push hole (91), a second connecting tube (95) fixedly connected to the cylinder (74), a third connecting tube (96) fixedly connected to the through groove (92), the push rod (93) cooperates with the push hole (91), the second connecting tube (95) cooperates with the third connecting tube (96), a baffle (10) and a corrugated plate fixedly arranged on the baffle (10) are fixedly arranged on the upper mold (1). The bellows (11) is connected to the push hole (91) and the injection head (3). The injection head (3) is used to connect with the push hole (91) and inject the injection plastic into the injection cavity (4) through the injection port (5). The rotating assembly (6) is used to switch the connection state between the pressing hole (81), the push hole (91) and the injection port (5). The driving assembly (7) is used to drive the pressing assembly (8) to press the injection plastic in the injection port (5) into the injection cavity (4) and drive the push assembly (9) to squeeze the injection plastic in the push hole (91) into the injection head (3).

2. The automatic stem 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). The output shaft of the servo motor (64) is connected to the turntable (61) via a belt. The bottom surface of the turntable (61) is in contact with the top surface of the upper mold (1).

3. The automatic stem 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).

4. The automatic stem removal injection mold according to claim 1, characterized in that: The pressing rod (82) and the pushing rod (93) are both made of steel.

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