Injection mold convenient to demold

Abstract

The utility model relates to the field of injection molds, and discloses an injection mold convenient to demold, which comprises a lower mold, the lower mold is fixed on the top surface of a placing plate, an upper mold is arranged above the lower mold, two accommodating grooves are formed in the inner bottom surface of the lower mold, a plurality of fixing grooves are formed in the inner bottom surfaces of the accommodating grooves, and the fixing grooves are arranged in the accommodating grooves. A limiting plate is slidably arranged on the inner wall of the containing groove, a plurality of fixing columns are fixed to the bottom face of the limiting plate and slidably connected with the fixing groove, a first spring is fixed to the bottom end of each fixing column, and the other end of each first spring is fixed to the inner bottom face of the corresponding fixing groove. According to the utility model, through the interaction of the pushing plate, the limiting plate, the first spring and the second spring, an upward force can be applied to a plastic product, so that the demolding force is uniformly distributed on the product, the appearance quality of the product is ensured, and the product is smoothly separated from the mold, thereby improving the demolding efficiency of the injection mold.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold which is easy to demould. Background Art

[0002] An injection mold is a tool used to produce plastic products, giving them a complete structure and precise dimensions. Injection molding is a process used for mass-producing complex parts. Typically, molten plastic is injected into the mold cavity under high pressure using an injection molding machine. After cooling and solidifying, the resulting molded part is removed from the mold.

[0003] The Chinese patent with announcement number CN220129350U is an injection mold that is easy to demold, including an outer frame, an upper mold body and a lower mold body, and is characterized in that: the upper mold body is fixedly installed on the top of the inner cavity of the outer frame, the lower mold body is fixedly connected to the bottom of the inner cavity of the outer frame, both sides of the bottom of the inner wall of the lower mold body are fixedly connected with sliding plates, the inner wall of the sliding plate is movably connected with a sliding block, the top of the sliding block is fixedly connected with a connecting plate, the rear side of the bottom of the connecting plate is fixedly connected with a first scraper, both sides of the bottom of the upper mold body are fixedly connected with a second scraper, and the rear side of the bottom of the inner wall of the outer frame is fixedly installed with a cleaning component.

[0004] In the above solution, the cleaning component is used to facilitate the cleaning of burrs, which solves the problem of burrs remaining on the product during demolding. However, it has the following disadvantages: this injection mold is not equipped with a structure for demolding the product, resulting in the product needing to be manually demolded after injection cooling, which easily leads to uneven demolding force on the product, thereby reducing the appearance quality of the product. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold that is easy to demould, so as to solve the problem that the injection mold is not provided with a structure for demoulding the product, resulting in the product needing to be manually demoulded after injection cooling, which easily leads to uneven demoulding force for the product.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solution: an injection mold that is easy to demold, comprising a lower mold, the lower mold is fixed on the top surface of a placing plate, an upper mold is arranged above the lower mold, the inner bottom surface of the lower mold is provided with two receiving grooves, the inner bottom surface of the receiving groove is provided with a plurality of fixed grooves, the inner wall of the receiving groove is slidably provided with a limit plate, the bottom surface of the limit plate is fixed with a plurality of fixed columns, the fixed column is slidably connected to the fixed groove, the bottom end of the fixed column is fixed with a first spring, the other end of the first spring is fixed to the inner bottom surface of the fixed groove, a plurality of fixing holes are provided on one side of the inner wall of the receiving groove, a push plate is slidably provided on the inner wall of the receiving groove, a plurality of connecting columns are fixed on one side of the push plate, the connecting column is slidably arranged with the fixing hole, the outer wall of the connecting column is wrapped with a second spring, one end of the second spring is fixed to the inner wall of the fixing hole, and the other end of the second spring is fixed to the outer wall of the connecting column, the cooperation between the connecting column and the second spring also facilitates the staff to push the connecting column from the outer wall of the lower mold, thereby assisting the product to be demolded smoothly.

[0007] Preferably, a first inclined surface is provided on both the left and right sides of the limiting plate, and a second inclined surface is provided on one side of the pushing plate. The first inclined surface is in contact with the second inclined surface. The cooperation between the first inclined surface and the second inclined surface can facilitate the pushing plate to push the limiting plate more effortlessly, so that the product can be demolded faster after the injection molding is completed, thereby saving a lot of labor and time costs.

[0008] Preferably, a mounting bracket is fixed to the top surface of the placement plate, and two limiting holes are provided on the top surface of the mounting bracket. A driving member is provided on the top surface of the mounting bracket, and one end of the telescopic rod of the driving member is fixed to the top surface of the upper mold. Two limiting columns are fixed to the top surface of the upper mold, and the limiting columns are slidably connected to the limiting holes. The limiting columns and the limiting holes can prevent the upper mold from excessive displacement or tilting during the opening and closing process, so as to avoid problems such as collision of the upper mold caused by high-speed opening and closing of the mold.

[0009] Preferably, positioning holes are provided on the left and right sides of the mounting frame, and positioning grooves are provided on the left and right sides of the upper mold, the positioning grooves correspond to the positioning holes, and the inner walls of the positioning holes are slidably connected with positioning pins, which pass through the positioning holes and extend into the positioning grooves, thereby limiting the displacement of the upper mold during the injection molding process and avoiding deformation of the mold body due to uneven force. During injection molding, the pressure of the plastic melt may cause the mold body to tend to deform, and the positioning pins can resist this deformation force to ensure that the shape of the mold body cavity remains unchanged.

[0010] Preferably, the top surface of the lower mold is provided with a plurality of snap-in grooves, and the bottom surface of the upper mold is fixed with a plurality of snap-in blocks, and the snap-in blocks are snap-fitted to the snap-in grooves. The cooperation between the snap-in blocks and the snap-in grooves can improve the connection stability between the upper mold and the lower mold in the mold closing state. During the injection molding process, the inside of the mold body will be subjected to greater pressure, and the snap-in structure can prevent the upper mold and the lower mold from relative displacement under the action of pressure.

[0011] Preferably, a placement groove is opened on the rear side of the lower mold, and a cooling plate is placed on the inner wall of the placement groove. Different cooling speeds will affect the shrinkage rate of the plastic. Rapid cooling by the cooling plate can make the plastic product shrink according to the predetermined size.

[0012] Preferably, a sealing ring is fixed to the top surface of the lower mold, which can prevent the plastic melt from overflowing during the injection molding process. During injection molding, the mold body cavity needs to maintain a relatively closed space to ensure that the plastic melt can be formed into a predetermined shape, thereby preventing waste of raw materials.

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

[0014] 1. Through the interaction of the push plate, the limit plate, the first spring, and the second spring, an upward force can be applied to the plastic product, so that the demoulding force is more evenly distributed on the product, ensuring the product's appearance quality and allowing it to be smoothly removed from the mold, thereby improving the demoulding efficiency of the injection mold. When the product is cooled and the upper mold moves upward, the two push plates will generate relative forces under the action of the second spring. At this time, the push plate will push the limit plate upward, so that the limit plate can easily push the product upward for demoulding under the action of the first spring. The cooperation between the limit column and the limit hole provides guidance for the upper mold during the mold closing and opening process, which can guide the upper mold to move up and down accurately, ensure the smoothness of the mold closing and opening movements, and reduce wear on the mold body.

[0015] Second, the positioning pins and positioning slots work together to precisely fix the upper mold in place after mold closing, providing additional positioning accuracy on the basis of the clamping structure to minimize deviations. The clamping blocks and clamping slots work together to ensure that the upper and lower molds are accurately aligned during mold closing, preventing the upper mold from shifting during the closing process, thereby ensuring that each cavity correctly forms the corresponding part of the product.

[0016] 3. Refrigeration sheets can shorten the cooling time of plastic products. Refrigeration sheets can accelerate the conduction and dissipation of heat, allowing plastic products to reach demolding temperature more quickly. Using refrigeration sheets can significantly improve production efficiency and reduce production cycles. The sealing ring helps maintain the pressure within the mold cavity. Appropriate molding pressure has a significant impact on the density and dimensional accuracy of plastic products. The sealing ring can prevent pressure leakage within the cavity, allowing the plastic melt to be evenly filled into every corner of the mold cavity under pressure, thereby ensuring uniform product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 It is an explosion diagram of the utility model;

[0019] Figure 3 for Figure 2 Explosion diagram of the middle limit column and the clamping block;

[0020] Figure 4 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0021] In the figure: 1. Lower mold; 2. Placement plate; 3. Upper mold; 4. Receiving groove; 5. Fixing groove; 6. Limiting plate; 7. Fixing column; 8. First spring; 9. Fixing hole; 10. Pushing plate; 11. Connecting column; 12. Second spring; 13. Mounting frame; 14. Limiting hole; 15. Driving member; 16. Limiting column; 17. Positioning hole; 18. Positioning groove; 19. Positioning pin; 20. Snap-in groove; 21. Snap-in block; 22. Placement groove; 23. Refrigeration plate; 24. Sealing ring. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] like Figures 1-4As shown, an injection mold for easy demoulding includes a lower mold 1, which is fixed on the top surface of a placement plate 2. An upper mold 3 is arranged above the lower mold 1. Two receiving grooves 4 are opened on the inner bottom surface of the lower mold 1. A plurality of fixing grooves 5 are opened on the inner bottom surface of the receiving groove 4. A limit plate 6 is slidably provided on the inner wall of the receiving groove 4. A plurality of fixing columns 7 are fixed on the bottom surface of the limit plate 6. The fixing columns 7 are slidably connected to the fixing groove 5. A first spring 8 is fixed to the bottom end of the fixing column 7. The other end of the first spring 8 is fixed to the inner bottom surface of the fixing groove 5. A plurality of fixing holes 9 are provided on one side of the inner wall of the accommodating groove 4, and a push plate 10 is slidably provided on the inner wall of the accommodating groove 4. A plurality of connecting columns 11 are fixed on one side of the push plate 10. The connecting columns 11 are slidably provided with the fixing holes 9. A second spring 12 is wound around the outer wall of the connecting column 11. One end of the second spring 12 is fixed to the inner wall of the fixing hole 9, and the other end of the second spring 12 is fixed to the outer wall of the connecting column 11. A first inclined surface is provided on both sides of the limit plate 6, and a second inclined surface is provided on one side of the push plate 10, and the first inclined surface is in contact with the second inclined surface.

[0024] In use, through the interaction of the push plate 10, the limit plate 6, the first spring 8, and the second spring 12, an upward force can be applied to the plastic product, so that the demoulding force is more evenly distributed on the product, ensuring the appearance quality of the product and making it smoothly separated from the mold, thereby improving the demoulding efficiency of the injection mold. When the product is cooled and the upper mold 3 moves upward, the two push plates 10 will generate relative forces under the action of the second spring 12. At this time, the push plate 10 will push the limit plate 6 upward, so that the limit plate 6 can conveniently push the product upward for demoulding under the action of the first spring 8. At the same time, the cooperation of the connecting column 11 and the second spring 12 also facilitates the staff to push the connecting column 11 from the outer wall of the lower mold 1, thereby assisting the product to be demoulded smoothly. Through the cooperation of the first inclined surface and the second inclined surface, the push plate 10 can push the limit plate 6 more effortlessly, so that the product can be demoulded faster after the injection molding is completed, thereby saving a lot of labor and time costs.

[0025] like Figure 1-Figure 3 As shown, a mounting bracket 13 is fixed to the top surface of the placement plate 2, and two limiting holes 14 are provided on the top surface of the mounting bracket 13. A driving member 15 is provided on the top surface of the mounting bracket 13, and one end of the telescopic rod of the driving member 15 is fixed to the top surface of the upper mold 3. Two limiting columns 16 are fixed to the top surface of the upper mold 3, and the limiting columns 16 are slidably connected to the limiting holes 14. Positioning holes 17 are provided on the left and right sides of the mounting bracket 13, and positioning grooves 18 are provided on the left and right sides of the upper mold 3. The positioning grooves 18 correspond to the positioning holes 17, and a positioning pin 19 is slidably connected to the inner wall of the positioning hole 17. The positioning pin 19 passes through the positioning hole 17 and extends into the positioning groove 18.

[0026] During use, the cooperation of the limiting column 16 and the limiting hole 14 provides guidance for the upper mold 3 during the mold closing and opening process, and can guide the upper mold 3 to move up and down accurately, ensuring the smoothness of the mold closing and opening action and reducing the wear of the mold body. At the same time, the limiting column 16 and the limiting hole 14 can prevent the upper mold 3 from excessive displacement or tilting during the mold opening and closing process, so as to avoid problems such as collision of the upper mold 3 caused by high-speed mold opening and closing. The cooperation of the locating pin 19 and the locating groove 18 can accurately fix the position of the upper mold 3 after mold closing, providing additional positioning accuracy on the basis of the clamping structure to ensure that the deviation is minimized. At the same time, the displacement of the upper mold 3 during the injection molding process is limited to prevent the mold body from being deformed due to uneven force. During injection molding, the pressure of the plastic melt may cause the mold body to have a tendency to deform. The locating pin 19 can resist this deformation force to ensure that the shape of the mold body cavity remains unchanged.

[0027] like Figures 1-4 As shown, the top surface of the lower mold 1 is provided with a plurality of snap-in grooves 20, the bottom surface of the upper mold 3 is fixed with a plurality of snap-in blocks 21, the snap-in blocks 21 are snap-connected with the snap-in grooves 20, a placement groove 22 is provided on the rear side of the lower mold 1, a cooling plate 23 is placed on the inner wall of the placement groove 22, and a sealing ring 24 is fixed on the top surface of the lower mold 1.

[0028] During use, the cooperation of the clamping block 21 and the clamping groove 20 can ensure that the upper mold 3 and the lower mold 1 can be accurately aligned when the mold is closed, preventing the upper mold 3 from shifting during the mold closing process, thereby ensuring that each cavity can correctly mold the corresponding part of the product. At the same time, the cooperation of the clamping block 21 and the clamping groove 20 can improve the connection stability of the upper mold 3 and the lower mold 1 in the closed state. During the injection molding process, the interior of the mold body will be subjected to greater pressure. The clamping structure can prevent the upper mold 3 and the lower mold 1 from relative displacement under the action of pressure. The cooling time of the plastic product can be shortened by the cooling plate 23. The cooling plate 23 can accelerate the conduction and dissipation of heat, so that the plastic product reaches the demoulding temperature more quickly. The use of the cooling plate 23 can significantly improve production efficiency and reduce the production cycle. At the same time, different cooling rates will affect the shrinkage rate of the plastic. Rapid cooling by the cooling plate 23 can make the plastic product shrink according to the predetermined size.

[0029] The sealing ring 24 helps to maintain the pressure in the mold body cavity. Appropriate molding pressure has an important influence on the density and dimensional accuracy of plastic products. The sealing ring 24 can prevent the pressure leakage in the cavity, so that the plastic melt can be evenly filled into every corner of the mold cavity under the action of pressure, thereby ensuring the uniformity of product quality. At the same time, the sealing ring 24 can prevent the plastic melt from overflowing during the injection molding process. During injection molding, the mold body cavity needs to maintain a relatively closed space to ensure that the plastic melt can be molded according to the predetermined shape, thereby preventing waste of raw materials.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection mold that is easy to demould, comprising a lower mold (1), wherein the lower mold (1) is fixed on the top surface of a placement plate (2), and is characterized in that: An upper mold (3) is provided above the lower mold (1), and two receiving grooves (4) are provided on the inner bottom surface of the lower mold (1), and a plurality of fixing grooves (5) are provided on the inner bottom surface of the receiving groove (4). A limiting plate (6) is provided on the inner wall of the receiving groove (4) for sliding, and a plurality of fixing columns (7) are fixed on the bottom surface of the limiting plate (6). The fixing columns (7) are slidably connected to the fixing groove (5), and a first spring (8) is fixed to the bottom end of the fixing column (7), and the other end of the first spring (8) is fixed to the inner wall of the fixing groove (5). The bottom surface of the receiving groove (4) is fixed, a plurality of fixing holes (9) are opened on one side of the inner wall of the receiving groove (4), a pushing plate (10) is slidably provided on the inner wall of the receiving groove (4), a plurality of connecting columns (11) are fixed on one side of the pushing plate (10), the connecting columns (11) are slidably provided with the fixing holes (9), a second spring (12) is wound around the outer wall of the connecting column (11), one end of the second spring (12) is fixed to the inner wall of the fixing hole (9), and the other end of the second spring (12) is fixed to the outer wall of the connecting column (11).

2. The injection mold for easy demoulding according to claim 1, characterized in that: The left and right sides of the limit plate (6) are both provided with a first inclined surface, and one side of the push plate (10) is provided with a second inclined surface, and the first inclined surface is in contact with the second inclined surface.

3. The injection mold for easy demoulding according to claim 1, characterized in that: A mounting bracket (13) is fixed on the top surface of the placement plate (2), and two limiting holes (14) are provided on the top surface of the mounting bracket (13). A driving member (15) is provided on the top surface of the mounting bracket (13), and one end of the telescopic rod of the driving member (15) is fixed to the top surface of the upper mold (3). Two limiting columns (16) are fixed on the top surface of the upper mold (3), and the limiting columns (16) are slidably connected to the limiting holes (14).

4. The injection mold for easy demoulding according to claim 3, characterized in that: Positioning holes (17) are provided on both the left and right sides of the mounting frame (13), and positioning grooves (18) are provided on both the left and right sides of the upper mold (3), the positioning grooves (18) correspond to the positioning holes (17), and the inner wall of the positioning hole (17) is slidably connected with a positioning pin (19), and the positioning pin (19) passes through the positioning hole (17) and extends into the positioning groove (18).

5. The injection mold for easy demoulding according to claim 4, characterized in that: The top surface of the lower mold (1) is provided with a plurality of clamping grooves (20), and the bottom surface of the upper mold (3) is fixed with a plurality of clamping blocks (21), and the clamping blocks (21) are clamped with the clamping grooves (20).

6. The injection mold for easy demoulding according to claim 5, characterized in that: A placement groove (22) is provided on the rear side of the lower mold (1), and a cooling fin (23) is placed on the inner wall of the placement groove (22).

7. The injection mold for easy demoulding according to claim 6, characterized in that: A sealing ring (24) is fixed on the top surface of the lower mold (1).

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