A precision injection mold that is easy to demould

Abstract

The present invention provides a precision injection mold that is easy to demold, and the precision injection mold that is easy to demold includes: an upper mold, a lower mold, a driving mechanism and a pushing mechanism. The upper mold and the lower mold are detachably connected to form a mold cavity. During the operation of the precision injection mold that is easy to demold, the upper mold and the lower mold are connected together, and injection molding raw materials are added to the mold cavity through the injection hole. When the injection molding is completed and the mold is to be demolded, the upper mold is removed from the lower mold. The driving cylinder drives the receiving plate to move closer to the lower mold through the driving connecting plate, two connecting rods, the driving plate, and the compression spring. In this process, the receiving plate drives the pushing plates to move through the sliding columns, so that each pushing plate pushes the product out of the mold cavity of the lower mold, thereby completing the demolding process. The compression spring ensures that the force applied by the receiving plate to the pushing plates through the sliding columns is within a controllable range, thereby preventing the pushing plates from damaging the receiving plate due to excessive pressure.

Description

Technical Field

[0001] The invention relates to the field of injection molds, in particular to a precision injection mold which is easy to demould. Background Art

[0002] Injection molding, also known as injection molding, is a molding process that combines injection and molding. Its advantages include fast production speed, high efficiency, automated molding operations, a wide variety of designs and shapes, and the ability to scale from simple to complex, large to small. Furthermore, the product is precise, easily updated, and can be made into complex shapes. Injection molding is suitable for mass production and other molding processes involving complex shapes. Injection molding involves stirring completely molten plastic material at a constant temperature through a screw, injecting it into a mold cavity at high pressure, and then cooling and solidifying it to produce a molded product. This method is suitable for mass production of complex parts and is a key processing method.

[0003] However, injection molds are indispensable tools for the injection molding process. Traditional injection molds, such as the technical solution disclosed in the patent with application number CN201610909966.6 and invention name Injection Mold, are not easy to demold after the injection molding is completed, which affects production efficiency. Summary of the Invention

[0004] Based on this, it is necessary to provide a precision injection mold that is easy to demould after the traditional injection mold is completed, which affects the technical problem of production efficiency.

[0005] A precision injection mold that is easy to demould, the precision injection mold that is easy to demould comprises: an upper mold, a lower mold, a driving mechanism and a pushing mechanism;

[0006] The upper mold and the lower mold are detachably connected to form a mold cavity; an injection hole is formed on the upper mold, and the injection hole is connected to the mold cavity; the lower mold is evenly formed with a plurality of push grooves at the bottom of the mold cavity, and a sliding hole is formed in the middle area of ​​the bottom of the push grooves;

[0007] The driving mechanism includes a driving cylinder, a driving connecting plate, two connecting rods, and a driving plate; the driving cylinder is drivingly connected to the driving connecting plate, and the two connecting rods are respectively located at the two ends of the driving connecting plate on a side facing away from the driving cylinder; the ends of the two connecting rods away from the driving connecting plate are connected to the driving plate; a sliding hole is opened in the middle area of ​​the driving plate;

[0008] The pushing mechanism includes a sliding column, a limiting plate, a limiting tube, a compression spring, a receiving plate, a plurality of sliding columns and a plurality of pushing plates; one end of the sliding column is connected to the limiting plate, the sliding column is adapted to the sliding hole, the sliding column is inserted in the sliding hole and is slidably connected to the driving plate; the limiting plate is located on the side of the driving plate close to the driving connecting plate; the end of the sliding column away from the limiting plate is connected to the receiving plate; the limiting tube is sleeved on the sliding column and connected to the receiving plate; the compression spring is adapted to the limiting tube, and the compression spring sleeve is The cam is mounted on the sliding column and is partially accommodated in the limiting tube; one end of the compression spring is connected to the driving plate, and the other end of the compression spring is connected to the receiving plate; each of the sliding columns is evenly arranged on the side of the receiving plate facing away from the compression spring, and one end of each sliding column away from the receiving plate is connected to a corresponding pushing plate; the pushing plate is adapted to the pushing groove, and the pushing plate is accommodated in the pushing groove and is slidably connected to the lower mold; the sliding column is adapted to the sliding hole, and the sliding column is inserted into the sliding hole and is slidably connected to the lower mold.

[0009] In one embodiment, the precision injection mold that is easy to demold also includes an air impact mechanism, which includes an air compressor and an air guide hose; an air accommodating cavity is provided inside the receiving plate, and an air duct is provided inside the sliding column; an air guide cavity is provided inside the pushing plate, and a plurality of air holes are evenly provided in a ring shape on the outer wall of the pushing plate at one end away from the sliding column, and each of the air holes is connected to the air guide cavity; the output end of the air compressor is connected to the air accommodating cavity through the air guide hose, and each of the air guide cavities is connected to the air accommodating cavity through an air duct.

[0010] In one embodiment, the precision injection mold that is easy to demold also includes a cooling mechanism, which includes a cold water tank, a water pump, a water pipe, a transfer hose and a dewatering hose; the water pump is located in the cold water tank and connected to the cold water tank, and the output end of the water pump is connected to the transfer hose through the water pipe; a cooling cavity is opened inside the lower mold, and the cooling cavity wraps the lower half of the mold cavity; the output end of the transfer hose is connected to the bottom of the cooling cavity, and the top of the cooling cavity is connected to the dewatering hose.

[0011] In one embodiment, a release agent is applied on the inner wall of the mold cavity.

[0012] In one embodiment, the release agent comprises the following components in parts by mass: 10 to 20 parts of epoxy soybean oil, 5 to 15 parts of dimethylsiloxane, 7 to 12 parts of palm oil, 12 to 16 parts of castor oil, 8 to 16 parts of ethyl acetate, 6 to 12 parts of polyethylene glycol, 10 to 20 parts of calcined diatomaceous earth, 4 to 8 parts of nano-titanium dioxide, 11 to 21 parts of maleic acid-modified rosin resin, 4 to 8 parts of aluminum stearate, 6 to 10 parts of triethanolamine and 5 to 8 parts of sodium dodecylbenzene sulfonate, with the balance being water.

[0013] In one embodiment, the connecting rod and the driving connecting plate are integrally formed.

[0014] In one embodiment, the connecting rod is a cylindrical structure.

[0015] In one embodiment, the connecting rod is a quadrangular prism structure.

[0016] In one embodiment, the limiting plate is a circular plate structure.

[0017] In one embodiment, the limiting plate is a rectangular plate structure.

[0018] During the operation of the above-mentioned precision injection mold that is easy to demold, the upper mold and the lower mold are connected together, and the injection molding material is added to the mold cavity through the injection hole. When the injection molding is completed and the mold is to be demolded, the upper mold is removed from the lower mold. The driving cylinder drives the receiving plate to move closer to the lower mold through the driving connecting plate, two connecting rods, the driving plate, and the compression spring. In this process, the receiving plate drives the movement of each push plate through each sliding column, so that each push plate pushes the product out of the mold cavity of the lower mold, thereby completing the demolding process. The compression spring ensures that the force applied by the receiving plate to each push plate through each sliding column is within a controllable range, to avoid the push plate damaging the receiving plate due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of a precision injection mold for easy demoulding in one embodiment;

[0020] Figure 2 A schematic diagram of a portion of the structure of a precision injection mold for easy demoulding in one embodiment;

[0021] Figure 3 A schematic diagram of a portion of the structure of a precision injection mold for easy demoulding in one embodiment;

[0022] Figure 4 Schematic diagram of a partial structure of a precision injection mold for easy demoulding in one embodiment. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0028] Please also refer to Figures 1 to 4 The present invention provides a precision injection mold 10 that is easy to demold. The precision injection mold 10 that is easy to demold includes: an upper mold 100, a lower mold 200, a driving mechanism 300 and a pushing mechanism 400.

[0029] The upper mold 100 and the lower mold 200 are detachably connected to form a mold cavity 101. The upper mold 100 has an injection hole 102 that communicates with the mold cavity 101. The lower mold 200 has a plurality of push grooves 103 evenly spaced at the bottom of the mold cavity 101, and a sliding hole 104 is defined in the middle of the bottom of the push grooves 103.

[0030] The driving mechanism 300 includes a driving cylinder 310, a driving connecting plate 320, two connecting rods 330 and a driving plate 340. The driving cylinder 310 is drivingly connected to the driving connecting plate 320, and the two connecting rods 330 are respectively located at the two ends of the side of the driving connecting plate 320 facing away from the driving cylinder 310. In this embodiment, the connecting rods 330 and the driving connecting plate 320 are integrally formed. The ends of the two connecting rods 330 away from the driving connecting plate 320 are both connected to the driving plate 340. In this embodiment, the connecting rods 330 are cylindrical in structure. In another embodiment, the connecting rods 330 are quadrangular in structure. A sliding hole 301 is provided in the middle area of ​​the driving plate 340.

[0031] The pushing mechanism 400 includes a sliding post 410, a limiting plate 420, a limiting tube 430, a compression spring 440, a receiving plate 450, a plurality of sliding posts 460, and a plurality of pushing plates 470. One end of the sliding post 410 is connected to the limiting plate 420. The sliding post 410 is adapted to the sliding hole 301. The sliding post 410 is inserted into the sliding hole 301 and is slidably connected to the drive plate 340. The limiting plate 420 is located on the side of the drive plate 340 close to the drive connecting plate 320. The end of the sliding post 410 away from the limiting plate 420 is connected to the receiving plate 450. In this embodiment, the limiting plate 420 is a circular plate-shaped structure. In another embodiment, the limiting plate 420 is a rectangular plate-shaped structure. The limiting tube 430 is sleeved on the sliding post 410 and connected to the receiving plate 450. The compression spring 440 is compatible with the limiting tube 430. The compression spring 440 is mounted on the sliding post 410 and partially housed in the limiting tube 430. One end of the compression spring 440 is connected to the drive plate 340, and the other end of the compression spring 440 is connected to the receiving plate 450. The sliding posts 460 are evenly arranged on the side of the receiving plate 450 facing away from the compression spring 440. The end of each sliding post 460 facing away from the receiving plate 450 is connected to a corresponding push plate 470. The push plate 470 is compatible with the push groove 103, is received in the push groove 103, and is slidably connected to the lower mold 200. The sliding post 460 is compatible with the sliding hole 104, is inserted into the sliding hole 104, and is slidably connected to the lower mold 200.

[0032] During operation, the precision injection mold 10, which facilitates demolding, connects the upper mold 100 and lower mold 200, and injection molding material is added to the mold cavity 101 through the injection hole 102. When injection molding is complete and demolding is desired, the upper mold 100 is removed from the lower mold 200. The drive cylinder 310 drives the connecting plate 450 toward the lower mold 200 via the connecting plate 320, two connecting rods 330, the drive plate 340, and the compression spring 440. During this process, the connecting plate 450 drives the push plates 470 via the sliding posts 460, causing each push plate 470 to push the product out of the mold cavity 101 of the lower mold 200, thereby completing the demolding process. The compression spring 440 ensures that the force exerted by the connecting plate 450 on the push plates 470 via the sliding posts 460 remains within a controllable range, preventing damage to the connecting plate 450 caused by the push plates 470 due to excessive pressure.

[0033] To facilitate the demolding process, in one embodiment, the precision injection mold 10 for easy demolding further includes an air impact mechanism 500, which includes an air compressor 510 and an air guide hose 520. An air accommodating cavity 401 is provided inside the receiving plate 450, and an air channel 404 is provided inside the sliding column 460. An air guide cavity 402 is provided inside the push plate 470, and a plurality of air holes 403 are evenly provided in a circular shape on the outer wall of the push plate 470 at one end away from the sliding column 460, and each air hole 403 is connected to the air guide cavity 402. The output end of the air compressor 510 is connected to the air accommodating cavity 401 through the air guide hose 520, and each air guide cavity 402 is connected to the air accommodating cavity 401 through an air channel 404. When each push plate 470 pushes the product out of the mold cavity 101 of the lower mold 200, the end of the push plate 470 away from the sliding post 460 first enters the mold cavity 101. The air compressor 510 then introduces compressed air into the mold cavity 101 through the air guide hose 520, the air accommodating cavity 401, the air channels 404, the air guide cavities 402, and the air holes 403. The pressure of the compressed air combined with the thrust of the push plates 470 can more conveniently push the product out of the mold cavity 101. In this way, the air impact mechanism 500 facilitates the demolding process.

[0034] In order to improve the cooling efficiency of the injection molding material in the precision injection mold 10 for easy demoulding, in one embodiment, the precision injection mold 10 for easy demoulding also includes a cooling mechanism 600, and the cooling mechanism 600 includes a cold water tank 610, a water pump 620, a water pump pipe 630, a transmission hose 640 and a discharge hose 650. The water pump 620 is located in the cold water tank 610 and is connected to the cold water tank 610, and the output end of the water pump 620 is connected to the transmission hose 640 through the water pump pipe 630. A cooling chamber 201 is provided inside the lower mold 200, and the cooling chamber 201 wraps around the lower half of the mold cavity 101. The output end of the transmission hose 640 is connected to the bottom of the cooling chamber 201, and the top of the cooling chamber 201 is connected to the discharge hose 650. After the injection molding is completed, the water pump 620 pumps the cold water in the cold water tank 610 into the cooling chamber 201 through the water pump pipe 630 and the transfer hose 640. The cold water enters the cooling chamber 201 from the bottom, flows out from the top of the cooling chamber 201, and is finally discharged from the cooling chamber 201 through the outlet hose 650. The cold water in the cooling chamber 201 passes through the lower mold 200 to cool the injection molding material in the mold cavity 101, thereby accelerating the cooling and molding of the injection molding material in the mold cavity 101. In this way, the cooling efficiency of the injection molding material in the precision injection mold 10 that is easy to demold is improved, and the production efficiency of the precision injection mold 10 that is easy to demold is increased.

[0035] In order to further facilitate the demoulding process, in one embodiment, a release agent is applied to the inner wall of the mold cavity 101. Specifically, in this embodiment, the release agent includes the following components in parts by mass: 10 to 20 parts of epoxy soybean oil, 5 to 15 parts of dimethylsiloxane, 7 to 12 parts of palm oil, 12 to 16 parts of castor oil, 8 to 16 parts of ethyl acetate, 6 to 12 parts of polyethylene glycol, 10 to 20 parts of calcined diatomaceous earth, 4 to 8 parts of nano-titanium dioxide, 11 to 21 parts of maleic acid-modified rosin resin, 4 to 8 parts of aluminum stearate, 6 to 10 parts of triethanolamine, and 5 to 8 parts of sodium dodecylbenzene sulfonate, with the remainder being water. The release agent composed of the above components can effectively prevent the injection molded product from sticking to the upper mold 100 and the lower mold 200. In this way, the release agent can facilitate the injection molded product to be separated from the mold cavity 101.

[0036] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A precision injection mold that is easy to demould, characterized in that: include: Upper mold, lower mold, driving mechanism and pushing mechanism; The upper mold and the lower mold are detachably connected to form a mold cavity; an injection hole is formed on the upper mold, and the injection hole is connected to the mold cavity; the lower mold is evenly formed with a plurality of push grooves at the bottom of the mold cavity, and a sliding hole is formed in the middle area of ​​the bottom of the push grooves; The driving mechanism includes a driving cylinder, a driving connecting plate, two connecting rods, and a driving plate; the driving cylinder is drivingly connected to the driving connecting plate, and the two connecting rods are respectively located at the two ends of the driving connecting plate on a side facing away from the driving cylinder; the ends of the two connecting rods away from the driving connecting plate are connected to the driving plate; a sliding hole is opened in the middle area of ​​the driving plate; The pushing mechanism includes a sliding column, a limiting plate, a limiting tube, a compression spring, a receiving plate, a plurality of sliding columns and a plurality of pushing plates; one end of the sliding column is connected to the limiting plate, the sliding column is adapted to the sliding hole, the sliding column is inserted in the sliding hole and is slidably connected to the driving plate; the limiting plate is located on the side of the driving plate close to the driving connecting plate; the end of the sliding column away from the limiting plate is connected to the receiving plate; the limiting tube is sleeved on the sliding column and connected to the receiving plate; the compression spring is adapted to the limiting tube, and the compression spring sleeve is The sliding column is on the sliding column and is partially accommodated in the limiting tube; one end of the compression spring is connected to the driving plate, and the other end of the compression spring is connected to the receiving plate; each of the sliding columns is evenly arranged on the side of the receiving plate facing away from the compression spring, and one end of each sliding column away from the receiving plate is correspondingly connected to a pushing plate; the pushing plate is adapted to the pushing groove, the pushing plate is accommodated in the pushing groove and is slidably connected to the lower mold; the sliding column is adapted to the sliding hole, the sliding column is inserted in the sliding hole and is slidably connected to the lower mold; The precision injection mold that is easy to demold also includes an air impact mechanism, which includes an air compressor and an air guide hose; an air accommodating cavity is provided inside the receiving plate, and an air duct is provided inside the sliding column; an air guide cavity is provided inside the pushing plate, and a plurality of air holes are evenly provided in a ring shape on the outer wall of the pushing plate at one end away from the sliding column, and each of the air holes is connected to the air guide cavity; the output end of the air compressor is connected to the air accommodating cavity through the air guide hose, and each of the air guide cavities is connected to the air accommodating cavity through an air duct.

2. The precision injection mold for easy demoulding according to claim 1, characterized in that: The precision injection mold that is easy to demold also includes a cooling mechanism, which includes a cold water tank, a water pump, a water pipe, a transmission hose and a de-energizing hose; the water pump is located in the cold water tank and connected to the cold water tank, and the output end of the water pump is connected to the transmission hose through the water pipe; a cooling cavity is opened inside the lower mold, and the cooling cavity wraps the lower half of the mold cavity; the output end of the transmission hose is connected to the bottom of the cooling cavity, and the top of the cooling cavity is connected to the de-energizing hose.

3. The precision injection mold for easy demoulding according to claim 1, characterized in that: A release agent is smeared on the inner wall of the mold cavity.

4. The precision injection mold for easy demoulding according to claim 3, characterized in that: The release agent comprises the following components in parts by mass: 10 to 20 parts of epoxy soybean oil, 5 to 15 parts of dimethylsiloxane, 7 to 12 parts of palm oil, 12 to 16 parts of castor oil, 8 to 16 parts of ethyl acetate, 6 to 12 parts of polyethylene glycol, 10 to 20 parts of calcined diatomaceous earth, 4 to 8 parts of nano titanium dioxide, 11 to 21 parts of maleic acid-modified rosin resin, 4 to 8 parts of aluminum stearate, 6 to 10 parts of triethanolamine and 5 to 8 parts of sodium dodecylbenzene sulfonate, with the balance being water.

5. The precision injection mold for easy demoulding according to claim 1, characterized in that: The connecting rod and the driving connecting plate are integrally formed.

6. The precision injection mold for easy demoulding according to claim 1, characterized in that: The connecting rod is a cylindrical structure.

7. The precision injection mold for easy demoulding according to claim 1, characterized in that: The connecting rod is a quadrangular prism structure.

8. The precision injection mold for easy demoulding according to claim 1, characterized in that: The limiting plate is a circular plate structure.

9. The precision injection mold for easy demoulding according to claim 1, characterized in that: The limiting plate is a rectangular plate structure.

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