A vertical injection mold

Abstract

The present invention discloses a vertical injection mold, comprising an upper mold, a lower mold and an injection port. A groove is provided on the outer surface of the upper end of the lower mold at a position corresponding to the injection port. The groove is designed as a circular structure, and a spring sheet is fixedly connected to its annular inner surface. The spring sheet is designed as a bowl-shaped structure as a whole, and the upper end of the annular outer surface is fixedly connected to the inner wall of the groove. A telescopic cavity is provided at the center of the groove. When the upper mold moves downward and squeezes the telescopic rod, the telescopic rod moves downward along the telescopic cavity and stretches the tensile spring. At this time, the spring sheet is in a bowl shape. After the injection molding is completed, the telescopic rod moves upward and resets under the elastic force generated by two groups of tensile springs. At this time, the center position of the bottom end of the spring sheet is bent upward by the resistance force transmitted by the telescopic rod, so that the product can be demoulded quickly. Since the surface of the spring sheet is smooth enough and is integrally formed, the probability of burrs on the product thus injected can be greatly reduced, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a vertical injection molding mold. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] The existing patent (Announcement No.: CN209699752U) is a vertical injection mold, including a mold body, an upper mold and a lower mold. The outer surface of one side of the upper mold is vertically fixedly connected with limit pins at the four corners. The upper end of the mold body is fixedly installed with an upper end receiving block, and the lower side of the upper end receiving block is fixedly installed with an upper mold component mounting block. The lower side end face of the upper mold component mounting block is fixedly connected to an end face of the base through a support column, and the upper side end of the lower mold is installed with a lower mold core. In the overall structure of the utility model, the lower mold core is provided and is flexibly combined with the lower mold top block. After the product injection is completed, the product can be separated from the lower mold as a whole by the action of the lower mold top block in the vertical direction, avoiding contact with the lower mold, which causes scratches on the product due to some factors, improving the smoothness of the product surface, and improving the practicality of the overall tool. The overall practicality is strong, and the effect of use is better than that of the traditional method.

[0004] 1. In the above patent, a top block is used to lift and demould the product. However, since the plastic in the molten state is highly fluid, plastic will flow into the gap created by the contact between the top block and the lower mold, resulting in more burrs on the product after forming, thereby increasing the amount of rework of the product and increasing the production cost of the product; 2. The material in the molten state will produce a certain adhesion force with the mold after forming, which is not conducive to the rapid demoulding of the product.

[0005] Therefore, a vertical injection mold is proposed. Summary of the invention

[0006] The object of the present invention is to provide a vertical injection mold to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vertical injection mold, comprising an upper mold, a lower mold, and an injection port, a groove is provided on the outer surface of the upper end of the lower mold at a position corresponding to the injection port, the groove is designed as a circular structure, and a spring is fixedly connected to its annular inner surface, the spring is designed as a whole in a bowl shape, and the upper end of its annular outer surface is fixedly connected to the inner wall of the groove, a telescopic cavity is provided at the center of the groove, a telescopic rod is movably connected to the inside of the telescopic cavity, and the telescopic rod and the telescopic cavity correspond to each other and are both designed as U-shaped structures, a tensile spring is fixedly connected to the upper end of the telescopic rod, and the upper end of the tensile spring is fixedly connected to the telescopic cavity, both ends of the telescopic cavity are in an open state, and the spring is made of tin bronze.

[0008] Preferably, the annular inner surface of the vertical part of the telescopic cavity is fixedly connected with a sealing ring, and the sealing ring and the telescopic rod are in contact with each other, the bottom end of the telescopic cavity is also in an open state, a cooling groove is opened inside the lower mold, the bottom end of the telescopic cavity is communicated with the cooling groove, the outer surface of the lower end of the telescopic rod is fixedly connected with a sealing rubber, and a one-way valve 2 is fixedly connected inside the cooling groove and on the left and right sides of the telescopic cavity, and the cooling groove is a mesh structure distributed inside the lower mold.

[0009] Preferably, an air guide groove is provided on the annular outer surface of the spring piece, and an air outlet is provided at the upper end of the air guide groove, and an air delivery groove is provided in the middle position of the telescopic cavity, the upper and lower ends of the air delivery groove are both open, and the lower end thereof is communicated with the telescopic cavity, the upper end of the air delivery groove is communicated with the external environment, and the air delivery groove is designed as a T-shaped structure, and two sets of one-way valves are fixedly connected inside the air delivery groove.

[0010] Preferably, a connecting block is fixedly connected to the right side of the cooling groove, a through hole is provided in the middle of the connecting block and is communicated with the cooling groove, a movable cavity is opened at the upper end of the connecting block, and a pendulum is rotatably connected to the inside of the movable cavity through a spring hinge, and a partition is fixedly connected to the lower end of the pendulum.

[0011] Preferably, the hinge between the pendulum and the movable chamber is located at five-sixths of the pendulum from top to bottom, and the size of the partition is smaller than the size of the through hole.

[0012] Preferably, a diaphragm is fixedly connected between the pendulum and the active chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By adding a series of structures such as springs, telescopic rods, telescopic chambers and tensile springs to the device, when the upper mold moves upward, the telescopic rod moves upward along the telescopic chamber under the elastic force of the tension spring and squeezes the springs, so that the center of the springs bulges, thereby allowing the product to be demoulded quickly;

[0015] 2. By adding a series of structures such as a pendulum, a diaphragm, and a partition to the device, when the telescopic rod moves upward inside the telescopic cavity, liquid also flows inside the cooling tank, thereby driving the pendulum to rotate with the hinge point as the fulcrum through the resistance generated between the partition and the liquid, so that the pendulum knocks on the lower mold so that the product can be demoulded quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is the overall structural view of the present invention;

[0018] Figure 2 It is a structural view of the upper mold and the lower mold of the present invention;

[0019] Figure 3 For the present invention Figure 2 Cross-section at CC;

[0020] Figure 4 It is a structural view of the shrapnel of the present invention.

[0021] Description of reference numerals:

[0022] 1. Upper mold; 11. Injection port; 2. Lower mold; 21. Telescopic cavity; 211. Sealing ring; 212. Air delivery groove; 213. Sealing rubber; 22. Telescopic rod; 23. Groove; 24. Tensile spring; 25. Cooling groove; 26. One-way valve 2; 3. Shrapnel; 31. Air guide groove; 32. Air outlet; 51. Connecting block; 52. Active cavity; 53. Diaphragm; 54. Spring hinge; 55. Pendulum; 56. Partition. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 4 , the present invention provides a technical solution:

[0025] like Figure 1 and Figure 2 , Figure 4 As shown, a vertical injection mold comprises an upper mold 1, a lower mold 2, and an injection port 11. A groove 23 is provided on the outer surface of the upper end of the lower mold 2 at a position corresponding to the injection port 11. The groove 23 is designed as a circular structure, and a spring piece 3 is fixedly connected to its annular inner surface. The spring piece 3 is designed as a bowl-shaped structure as a whole, and the upper end of its annular outer surface is fixedly connected to the inner wall of the groove 23. A telescopic cavity 21 is provided at the center of the groove 23. A telescopic rod 22 is movably connected to the inside of the telescopic cavity 21 up and down, and the telescopic rod 22 and the telescopic cavity 21 correspond to each other and are both designed as U-shaped structures. A tensile spring 24 is fixedly connected to the upper end of the telescopic rod 22, and the upper end of the tensile spring 24 is fixedly connected to the telescopic cavity 21. Both ends of the telescopic cavity 21 are in an open state, and the spring piece 3 is made of tin bronze.

[0026] By adopting the above technical solution, in order to reduce the probability of burrs on the product, during operation, the upper mold 1 moves downward under the drive of the injection molding machine so that the injection port 11 is aligned with the spring 3 at the upper end of the lower mold 2, and then the upper and lower molds are closed. Finally, the material is shaped and cooled by the spring 3 and the upper mold 1 to form a motor back cover. The spring 3 is made of tin bronze and has good elasticity. When the upper mold 1 moves downward and squeezes the telescopic rod 22, the telescopic rod 22 moves downward along the telescopic cavity 21 and stretches the tensile spring 24. At this time, the spring 3 is bowl-shaped. After the injection molding is completed, the telescopic rod 22 moves upward and resets under the elastic force generated by the two groups of tensile springs 24. At this time, the center position of the bottom end of the spring 3 is bent upward by the resistance force transmitted by the telescopic rod 22, so that the product can be quickly demolded. Since the surface of the spring 3 is smooth enough and is integrally formed, the product thus injected can greatly reduce the probability of burrs, thereby improving production efficiency.

[0027] As an embodiment of the present invention, Figure 2 and Figure 3 As shown, the bottom end of the telescopic cavity 21 is also in an open state, a cooling groove 25 is opened inside the lower mold 2, the bottom end of the telescopic cavity 21 is communicated with the cooling groove 25, a sealing rubber 213 is fixedly connected to the outer surface of the lower end of the telescopic rod 22, a one-way valve 26 is fixedly connected inside the cooling groove 25 and on the left and right sides of the telescopic cavity 21, and the cooling groove 25 is a mesh structure distributed inside the lower mold 2.

[0028] By adopting the above technical solution, the left and right ends of the cooling groove 25 are fixedly connected to the water inlet pipe. When the telescopic rod 22 moves up and down along the telescopic cavity 21, the liquid inside the mesh cooling groove 25 is continuously transported from right to left under the action of the sealing rubber 213 under the restriction of the one-way valve 26, thereby dissipating the heat of the mold and reducing the cooling and forming time of the product.

[0029] As an embodiment of the present invention, Figure 2As shown, the annular inner surface of the vertical part of the telescopic cavity 21 is fixedly connected with a sealing ring 211, and the sealing ring 211 and the telescopic rod 22 are fitted with each other, the annular outer surface of the spring piece 3 is provided with an air guide groove 31, and the upper end of the air guide groove 31 is provided with an air outlet 32, and the middle position of the telescopic cavity 21 is provided with a gas delivery groove 212, the upper and lower ends of the gas delivery groove 212 are both open, and the lower end thereof is communicated with the telescopic cavity 21, the upper end of the gas delivery groove 212 is communicated with the external environment, and the gas delivery groove 212 is designed as a T-shaped structure, and two sets of one-way valves are fixedly connected inside the gas delivery groove 212.

[0030] By adopting the above technical solution and based on the above embodiment, when the telescopic rod 22 moves upward under the elastic force of the tension spring 24, the telescopic chamber 21 remains relatively sealed under the action of the sealing ring 211. At this time, the gas passes through the gas conveying groove 212 and then passes through the gas guide groove 31 to surround the spring piece 3 for one circle, and is finally discharged at the gas outlet 32. The air inside the telescopic chamber 21 decreases along with the decrease in the temperature of the lower mold 2. Through the mutual cooperation of the above structures, the telescopic rod 22 presses the gas with a lower temperature inside the telescopic chamber 21 out of the telescopic chamber 21 to cool the spring piece 3, thereby improving the cooling effect on the spring piece 3, thereby improving the demolding speed of the product. When the upper mold 1 presses the telescopic rod 22 downward, the external air is sucked into the telescopic chamber 21 through the one-way valve 1 for next use.

[0031] As an embodiment of the present invention, Figure 2 As shown, a connecting block 51 is fixedly connected to the right side of the cooling groove 25, a through hole is provided in the middle of the connecting block 51, and the connecting block 51 is communicated with the cooling groove 25, a movable cavity 52 is opened at the upper end of the connecting block 51, and a pendulum 55 is rotatably connected to the inside of the movable cavity 52 through a spring hinge 54, and a partition 56 is fixedly connected to the lower end of the pendulum 55.

[0032] By adopting the above technical solution, based on the above embodiment, during operation, when the liquid moves from right to left inside the cooling tank 25, it will drive the partition 56 to flip clockwise with the spring hinge 54 as the fulcrum, so that the pendulum 55 rotates clockwise at the same time and accumulates force under the action of the spring hinge 54. When the liquid inside the cooling tank 25 no longer flows, the pendulum 55 is reset under the elastic force of the spring hinge 54 and knocks the lower mold 2, so that the spring piece 3 produces a certain vibration and the finished model inside it can quickly separate from the spring piece 3, thereby increasing the discharge speed of the finished model and indirectly increasing the output.

[0033] As an embodiment of the present invention, Figure 2 As shown, the hinged joint between the pendulum 55 and the active chamber 52 is located at five-sixths of the pendulum 55 from top to bottom, and the size of the partition 56 is smaller than the size of the through hole.

[0034] By adopting the above technical solution, since the partition 56 will only flip over when it is impacted by the water flow, in order to reduce the resistance encountered by the partition 56 when it is reset, during operation, when the liquid is still, the partition 56 is reset under the elastic force generated by the spring hinge 54. At this time, since the size of the partition 56 is smaller than the size of the through-port, it can be reset and drive the pendulum 55 to strike the mold under the drive of the spring hinge 54 after not being impacted by the liquid. At the same time, through the principle of leverage, the swing speed of the partition 56 is less than the movement speed of the pendulum 55, thereby further improving the striking effect of the pendulum 55 on the lower mold 2.

[0035] As an embodiment of the present invention, Figure 2 As shown, a diaphragm 53 is fixedly connected between the pendulum 55 and the active chamber 52 .

[0036] By adopting the above technical solution, in order to prevent the liquid from flowing out of the active cavity 52, during operation, the diaphragm 53 is fixedly connected to the pendulum 55 and the active cavity 52. ​​The setting of the diaphragm 53 effectively prevents the liquid flowing into the cooling groove 25 from leaking from the active cavity 52, thereby improving the stability of the device.

[0037] Working principle: For the injection molding machine using polyethylene raw materials, the upper mold 1 moves downward under the drive of the injection molding machine so that the injection port 11 is aligned with the spring 3 at the upper end of the lower mold 2, and then the upper and lower molds are closed. Finally, the material is shaped and cooled by the spring 3 and the upper mold 1 to form the motor back cover. The spring 3 is made of tin bronze and has good elasticity. When the upper mold 1 moves downward and squeezes the telescopic rod 22, the telescopic rod 22 moves downward along the telescopic cavity 21 and stretches the tensile spring 24. At this time, the spring 3 is bowl-shaped. After the injection molding is completed, the telescopic rod 22 moves upward and resets under the elastic force generated by the two sets of tensile springs 24. At this time, the bottom center position of the spring 3 is bent upward by the resistance force transmitted by the telescopic rod 22, so that the product can be quickly Demolding, the left and right ends of the cooling groove 25 are fixedly connected to the water inlet pipe. When the telescopic rod 22 moves up and down along the telescopic cavity 21, the liquid inside the mesh cooling groove 25 is continuously transported from right to left under the action of the sealing rubber 213 under the restriction of the one-way valve 26, so as to dissipate heat from the mold. When the telescopic rod 22 moves upward under the elastic force of the tension spring 24, the telescopic cavity 21 remains relatively sealed under the action of the sealing ring 211. At this time, the gas passes through the gas delivery groove 212 and then through the gas guide groove 31 around the spring piece 3 for a week, and is finally discharged at the gas outlet 32. The air inside the telescopic cavity 21 is reduced along with the reduction of the temperature of the lower mold 2. Through the mutual cooperation of the above structures, the telescopic rod 22 reduces the temperature inside the telescopic cavity 21. The low-temperature gas is pressed out from the telescopic chamber 21 to cool the spring 3, thereby improving the cooling effect on the spring 3 and improving the demoulding speed of the product. When the upper mold 1 presses down the telescopic rod 22, the external air is sucked into the telescopic chamber 21 through the one-way valve 1 for next use. When the liquid moves from the right to the left inside the cooling groove 25, it will drive the partition 56 to turn clockwise with the spring hinge 54 as the fulcrum, so that the pendulum 55 rotates clockwise at the same time and accumulates force under the action of the spring hinge 54. When the liquid in the cooling groove 25 stops flowing, the pendulum 55 is reset under the elastic force of the spring hinge 54 and knocks the lower mold 2, so that the spring 3 produces a certain vibration and the finished product model inside it can be quickly demoulded. The spring sheet 3 is separated from the cooling tank 25, thereby increasing the discharge speed of the finished model and indirectly increasing the output. The setting of the diaphragm 53 effectively prevents the liquid flowing into the cooling tank 25 from leaking from the active cavity 52. ​​Since the partition 56 will flip over only when it is impacted by the water flow, in order to reduce the resistance encountered by the partition 56 when it is reset, when the liquid is still, the partition 56 is reset under the elastic force generated by the spring hinge 54. At this time, since the size of the partition 56 is smaller than the size of the through-port, it can be reset and drive the pendulum 55 to strike the mold under the drive of the spring hinge 54 after not being impacted by the liquid. At the same time, through the principle of leverage, the swing speed of the partition 56 is less than the movement speed of the pendulum 55, thereby further improving the striking effect of the pendulum 55 on the lower mold 2.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical injection mold, comprising an upper mold (1), a lower mold (2), and an injection port (11), characterized in that: A groove (23) is provided on the outer surface of the upper end of the lower mold (2) at a position corresponding to the injection port (11); the groove (23) is designed as a circular structure, and a spring sheet (3) is fixedly connected to its annular inner surface; the spring sheet (3) is designed as a bowl-shaped structure as a whole, and the upper end of its annular outer surface is fixedly connected to the inner wall of the groove (23); a telescopic cavity (21) is provided at the center of the groove (23); a telescopic rod (22) is movably connected to the inside of the telescopic cavity (21) in an upper and lower manner, and the telescopic rod (22) and the telescopic cavity (21) are matched with each other and are both designed as U-shaped structures; a tension spring (24) is fixedly connected to the upper end of the telescopic rod (22), and the upper end of the tension spring (24) is fixedly connected to the telescopic cavity (21); both ends of the telescopic cavity (21) are in an open state, and the spring sheet (3) is made of tin bronze; The annular inner surface of the vertical part of the telescopic cavity (21) is fixedly connected with a sealing ring (211), and the sealing ring (211) and the telescopic rod (22) are in contact with each other. The bottom end of the telescopic cavity (21) is also in an open state. A cooling groove (25) is provided inside the lower mold (2). The bottom end of the telescopic cavity (21) is communicated with the cooling groove (25). The outer surface of the lower end of the telescopic rod (22) is fixedly connected with a sealing rubber (213). The inside of the cooling groove (25) and on the left and right sides of the telescopic cavity (21) are fixedly connected with a one-way valve 2 (26). The cooling groove (25) is a mesh structure distributed inside the lower mold (2); The annular outer surface of the spring sheet (3) is provided with an air guide groove (31), and the upper end of the air guide groove (31) is provided with an air outlet (32); the middle position of the telescopic cavity (21) is provided with an air delivery groove (212); the upper and lower ends of the air delivery groove (212) are both in an open state, and the lower end thereof is in communication with the telescopic cavity (21); the upper end of the air delivery groove (212) is in communication with the external environment, and the air delivery groove (212) is designed as a T-shaped structure, and two sets of one-way valves are fixedly connected inside the air delivery groove (212); A connecting block (51) is fixedly connected to the right side of the cooling groove (25); a through hole is provided in the middle of the connecting block (51) and is communicated with the cooling groove (25); a movable cavity (52) is provided at the upper end of the connecting block (51); a pendulum (55) is rotatably connected to the inside of the movable cavity (52) via a spring hinge (54); and a partition (56) is fixedly connected to the lower end of the pendulum (55).

2. A vertical injection mold according to claim 1, characterized in that: The hinged connection between the pendulum (55) and the active chamber (52) is located at five sixths of the pendulum (55) from top to bottom, and the size of the partition (56) is smaller than the size of the through hole.

3. A vertical injection mold according to claim 1, characterized in that: A diaphragm (53) is fixedly connected between the pendulum (55) and the active chamber (52).

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