Precise injection mold convenient to demold

Abstract

The invention provides a precise injection mold convenient to demold. The precise injection mold convenient to demold comprises an upper mold, a lower mold, a driving mechanism and a pushing mechanism. And the upper mold and the lower mold are detachably connected to form a mold cavity. In the working process of the precise injection mold convenient to demold, the upper mold body and the lower mold body are connected together, and injection molding raw materials are added into the mold cavity through the injection molding holes. And demolding after injection molding is finished. And the upper die is detached from the lower die. The driving air cylinder drives the bearing plate to move close to the lower die through the driving connecting plate, the two connecting rods, the driving plate and the compression spring. In the process, the bearing plate drives the pushing discs to move through the sliding columns, so that the products are pushed out of a mold cavity of the lower mold through the pushing discs, and demolding treatment is completed. Compression springs ensure that the force applied by the bearing plate to the pushing discs through the sliding columns is within a controllable range, and the situation that the bearing plate is damaged by the pushing discs due to the fact that the pressure is too large is avoided.

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 method that combines injection and molding. The advantages of the injection molding method are fast production speed and high efficiency. The injection molding operation can be automated, there are many varieties of colors and patterns, the shapes can be from simple to complex, the sizes can be from large to small, and the product size is accurate. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes. The injection molding method is a method in which a completely molten plastic material is stirred by a screw at a certain temperature, injected into the mold cavity with high pressure, and a molded product is obtained after cooling and solidification. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.

[0003] However, the injection mold is an indispensable tool 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 the production efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a precision injection mold that is easy to demold 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; The upper mold and the lower mold are detachably connected to form a mold cavity; an injection hole is provided on the upper mold, and the injection hole is connected to the mold cavity; the lower mold is evenly provided with a plurality of push grooves at the bottom of the mold cavity, and a sliding hole is provided in the middle area of ​​the bottom of the push groove; The driving mechanism comprises 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 two ends of a side of the driving connecting plate facing away from the driving cylinder; one end of the two connecting rods away from the driving connecting plate is connected to the driving plate; a sliding hole is provided in the middle area of ​​the driving plate; The pushing mechanism includes a sliding column, a limit plate, a limit 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 limit 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 limit plate is located on a side of the driving plate close to the driving connecting plate; one end of the sliding column away from the limit plate is connected to the receiving plate; the limit tube is sleeved on the sliding column and connected to the receiving plate; the compression spring is adapted to the limit tube, and the compression spring sleeve is On the sliding column and 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.

[0006] In one of the embodiments, the precision injection mold that is easy to demold also includes an air impulse 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.

[0007] 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 transmission hose and a discharge 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 discharge hose.

[0008] In one embodiment, a release agent is applied on the inner wall of the mold cavity.

[0009] In one embodiment, the release agent includes the following components in parts by mass: 10 to 20 parts of epoxidized 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, and the balance is water.

[0010] In one embodiment, the connecting rod and the driving connecting plate are integrally formed.

[0011] In one embodiment, the connecting rod is a cylindrical structure.

[0012] In one embodiment, the connecting rod is a quadrangular prism structure.

[0013] In one embodiment, the limiting plate is a circular plate structure.

[0014] In one embodiment, the limiting plate is a rectangular plate structure.

[0015] During the working process 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 material is added into 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 each push plate to move 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, so as to avoid the push plate damaging the receiving plate due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a precision injection mold for easy demoulding in one embodiment; Figure 2 A schematic diagram of a partial structure of a precision injection mold for easy demoulding in one embodiment; Figure 3 A schematic diagram of a partial structure of a precision injection mold for easy demoulding in one embodiment; Figure 4 It is a schematic diagram of a part of the structure of a precision injection mold for easy demoulding in one embodiment. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned purpose, 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 in conjunction with the accompanying drawings. In the following description, many specific details are set forth so as to fully understand 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, so the present invention is not limited by 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" and the like is based on the orientation or position relationship shown in the accompanying drawings, 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 a limitation of the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0022] Please also read 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.

[0023] The upper mold 100 and the lower mold 200 are detachably connected to form a mold cavity 101. The upper mold 100 is provided with an injection hole 102, which is connected to the mold cavity 101. The lower mold 200 is evenly provided with a plurality of push grooves 103 at the bottom of the mold cavity 101, and a sliding hole 104 is provided in the middle area of ​​the bottom of the push groove 103.

[0024] 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 two ends of a side of the driving connecting plate 320 facing away from the driving cylinder 310. In the present embodiment, the connecting rod 330 and the driving connecting plate 320 are integrally formed. One end of the two connecting rods 330 away from the driving connecting plate 320 is connected to the driving plate 340. In the present embodiment, the connecting rod 330 is a cylindrical structure. In another embodiment, the connecting rod 330 is a quadrangular prism structure. A sliding hole 301 is provided in the middle area of ​​the driving plate 340.

[0025] The pushing mechanism 400 includes a sliding column 410, a limiting plate 420, a limiting tube 430, a compression spring 440, a receiving plate 450, a plurality of sliding columns 460 and a plurality of pushing plates 470. One end of the sliding column 410 is connected to the limiting plate 420, the sliding column 410 is adapted to the sliding hole 301, the sliding column 410 is inserted into the sliding hole 301 and is slidably connected to the driving plate 340. The limiting plate 420 is located on a side of the driving plate 340 close to the driving connecting plate 320. One end of the sliding column 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 column 410 and connected to the receiving plate 450. The compression spring 440 is matched with the limit tube 430, and the compression spring 440 is sleeved on the slide column 410 and partially accommodated in the limit 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. Each sliding column 460 is evenly arranged on the side of the receiving plate 450 facing away from the compression spring 440, and one end of each sliding column 460 away from the receiving plate 450 is correspondingly connected to a push plate 470. The push plate 470 is matched with the push groove 103, and the push plate 470 is accommodated in the push groove 103 and is slidably connected to the lower mold 200. The sliding column 460 is matched with the sliding hole 104, and the sliding column 460 is inserted into the sliding hole 104 and is slidably connected to the lower mold 200.

[0026] During the working process of the precision injection mold 10 that is easy to demould, the upper mold 100 and the lower mold 200 are connected together, and the injection molding raw material is added into the mold cavity 101 through the injection hole 102. When the injection molding is completed and the mold is to be demoulded. The upper mold 100 is removed from the lower mold 200. The driving cylinder 310 drives the receiving plate 450 to move close to the lower mold 200 by driving the connecting plate 320, two connecting rods 330, the driving plate 340, and the compression spring 440. In this process, the receiving plate 450 drives each push plate 470 to move through each sliding column 460, so that each push plate 470 pushes the product out of the mold cavity 101 of the lower mold 200, thereby completing the demoulding process. The compression spring 440 ensures that the force applied by the receiving plate 450 to each push plate 470 through each sliding column 460 is within a controllable range, so as to avoid the push plate 470 damaging the receiving plate 450 due to excessive pressure.

[0027] In order to facilitate the demoulding process, in one embodiment, the precision injection mold 10 for easy demoulding 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 an annular shape on the outer wall of the end of the push plate 470 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 out the product in the mold cavity 101 of the lower mold 200, the end of the push plate 470 away from the sliding column 460 first enters the mold cavity 101, and the air compressor 510 passes compressed air into the mold cavity 101 through the air guide hose 520, the accommodating air cavity 401, each air channel 404, each air guide cavity 402 and each air hole 403. The air pressure of the compressed air combined with the thrust of each push plate 470 can more conveniently push the product out of the mold cavity 101. In this way, the air impact mechanism 500 is more convenient for demolding.

[0028] 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 lead-out hose 650. The water pump 620 is located in the cold water tank 610 and 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 cavity 201 is provided inside the lower mold 200, and the cooling cavity 201 wraps the lower half of the mold cavity 101. The output end of the transmission hose 640 is connected to the bottom of the cooling cavity 201, and the top of the cooling cavity 201 is connected to the lead-out 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 pumping pipe 630 and the transmission hose 640. The cold water enters from the bottom of the cooling chamber 201, flows out from the top of the cooling chamber 201, and finally exits the cooling chamber 201 through the outlet hose 650. The cold water in the cooling chamber 201 cools the injection molding material in the mold cavity 101 through the lower mold 200, and accelerates 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.

[0029] In order to further facilitate the demoulding process, in one of the embodiments, a demoulding agent is applied to the inner wall of the mold cavity 101. Specifically, in the present embodiment, the demoulding agent includes the following components in parts by mass: 10 to 20 parts of epoxy soybean oil, 5 to 15 parts of dimethyl siloxane, 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, and the remainder is water. The demoulding 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 demoulding agent can facilitate the injection molded product to be separated from the mold cavity 101. The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0030] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached 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 provided on the upper mold, and the injection hole is connected to the mold cavity; the lower mold is evenly provided with a plurality of push grooves at the bottom of the mold cavity, and a sliding hole is provided in the middle area of ​​the bottom of the push groove; The driving mechanism comprises 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 two ends of a side of the driving connecting plate facing away from the driving cylinder; one end of the two connecting rods away from the driving connecting plate is connected to the driving plate; a sliding hole is provided in the middle area of ​​the driving plate; The pushing mechanism includes a sliding column, a limit plate, a limit 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 limit 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 limit plate is located on a side of the driving plate close to the driving connecting plate; one end of the sliding column away from the limit plate is connected to the receiving plate; the limit tube is sleeved on the sliding column and connected to the receiving plate; the compression spring is adapted to the limit tube, and the compression spring sleeve is On the sliding column and 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.

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 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 channel 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 channel.

3. 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 discharge 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 discharge hose.

4. 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.

5. The precision injection mold for easy demoulding according to claim 4, 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, and the balance is water.

6. 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.

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

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

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

10. 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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