Injection mold with cooling mechanism

Abstract

This utility model discloses an injection mold with a cooling mechanism, including a mounting base. A lower mold is fixedly mounted on the top of the mounting base, and a lower cooling cavity is formed inside the lower mold. A lifting and closing mold assembly is mounted on the top of the mounting base, and an upper mold is mounted on the top of the mounting base via the lifting and closing mold assembly. An upper cooling cavity is formed inside the upper mold. A water inlet pipe is fixedly mounted on the right side of the upper mold, and a water outlet pipe is fixedly mounted on the right side of the lower mold. Cooling water is transported to the upper cooling cavity through the water inlet pipe, and the cooling water enters the lower cooling cavity through the delivery pipe assembly, simultaneously cooling both the upper and lower molds. This increases the contact area between the cooling medium and the mold, thereby improving the heat dissipation rate. This avoids the problem of insufficient heat dissipation area to meet the rapid cooling requirements in molds for some large or thick-walled products, and prevents excessively long cooling times due to low cooling rates.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with a cooling mechanism. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of colors and shapes (from simple to complex), and sizes ranging from large to small. It also produces precise dimensions, facilitates product updates, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes. It involves injecting fully molten plastic material, stirred by a screw at a specific temperature, into a mold cavity under high pressure, and then cooling and solidifying to obtain the molded product.

[0003] During the use of injection molds, a cooling mechanism is required to cool the workpiece inside the mold, thereby allowing the raw material to cool and solidify within the mold. Most existing injection mold cooling mechanisms are cooling pipes installed inside the lower mold, which deliver cooling water to the inside of the cooling pipes to cool and solidify the workpiece.

[0004] However, during the use of the cooling mechanism, the limited contact area between the cooling medium and the mold due to the cooling mechanism being set inside a single mold limits the heat dissipation rate. In some molds for large or thick-walled products, the limited heat dissipation area may not be able to meet the needs of rapid cooling, resulting in excessively long cooling time. Based on the above problems, this application proposes an injection mold with a cooling mechanism. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an injection mold with a cooling mechanism to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An injection mold with a cooling mechanism includes a mounting base, a lower mold fixedly mounted on the top of the mounting base, a lower cooling cavity formed inside the lower mold, a lifting and closing mold assembly mounted on the top of the mounting base, an upper mold mounted on the top of the mounting base via the lifting and closing mold assembly, an upper cooling cavity formed inside the upper mold, a water inlet pipe fixedly mounted on the right side of the upper mold, a water outlet pipe fixedly mounted on the right side of the lower mold, a conveying pipe assembly connecting the left side of the lower mold and the left side of the upper mold, and a buffer assembly mounted on the top of the mounting base.

[0008] Preferably, the lifting and closing mold assembly includes a mounting column fixedly installed on the top of the mounting base, a mounting plate fixedly installed at the top of the mounting column, a hydraulic push rod fixedly installed at the top of the mounting plate, a movable plate fixedly installed at the output end of the hydraulic push rod, the upper mold fixedly installed at the bottom of the movable plate, a limit ring fixedly installed on the surface of the movable plate, and the limit ring slidably installed on the surface of the mounting column.

[0009] Preferably, the conveying pipe assembly includes an upper connecting pipe and a lower connecting pipe. The lower connecting pipe is fixedly installed on the left side of the upper mold and the lower connecting pipe is fixedly installed on the left side of the lower mold. A connecting ring is fixedly provided at the bottom end of the upper connecting pipe and the top end of the lower connecting pipe. A connecting threaded sleeve is provided on the surface of each of the two connecting rings. The two connecting threaded sleeves are slidably provided on the surface of the upper connecting pipe and the surface of the lower connecting pipe, respectively. A connecting thread head is provided inside the connecting threaded sleeve. A sealing gasket is provided between the facing surfaces of the connecting thread head and the connecting ring. A corrugated pipe is connected between the facing surfaces of the connecting thread heads.

[0010] Preferably, the buffer assembly includes a buffer spring fixedly installed on the top of the mounting base, and a buffer ring is fixedly provided at the top of the buffer spring, the buffer ring being slidably disposed on the surface of the mounting column.

[0011] Preferably, there are four mounting columns and four limiting rings, and the four mounting columns and four limiting rings are arranged in a circular array.

[0012] Preferably, both the upper and lower connecting pipes are bent pipes, both are made of stainless steel, and the radii of the upper and lower connecting pipes are the same.

[0013] Preferably, the sealing gasket has a circular structure and is made of elastic rubber.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the injection mold with a cooling mechanism delivers cooling water to the upper cooling chamber through the water inlet pipe, and the cooling water enters the lower cooling chamber through the delivery pipe assembly, simultaneously cooling the upper and lower molds. This increases the contact area between the cooling medium and the mold, thereby increasing the heat dissipation rate. This avoids the situation where the limited heat dissipation area of ​​some large or thick-walled product molds cannot meet the needs of rapid cooling, and avoids the problem of excessively long cooling time caused by excessively low cooling rate. Attached Figure Description

[0015] Figure 1 This is an isometric drawing of the structure of this utility model;

[0016] Figure 2 This is a right sectional view of the structure of this utility model;

[0017] Figure 3 for Figure 2 Enlarged view of the structure at point A;

[0018] Figure 4 This is a partial structural diagram of the present invention.

[0019] In the diagram: 1. Mounting base; 2. Lower mold; 3. Lower cooling chamber; 4. Upper mold; 5. Upper cooling chamber; 6. Mounting column; 7. Mounting plate; 8. Hydraulic push rod; 9. Moving plate; 10. Limiting ring; 11. Upper connecting pipe; 12. Lower connecting pipe; 13. Connecting ring; 14. Connecting screw sleeve; 15. Connecting screw head; 16. Sealing gasket; 17. Bellows; 18. Water inlet pipe; 19. Water outlet pipe; 20. Buffer ring; 21. Buffer spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figure 1-4An injection mold with a cooling mechanism includes a mounting base 1, a lower mold 2 fixedly mounted on the top of the mounting base 1, a lower cooling cavity 3 inside the lower mold 2, a lifting and closing mold assembly on the top of the mounting base 1, an upper mold 4 mounted on the top of the mounting base 1 via the lifting and closing mold assembly, an upper cooling cavity 5 inside the upper mold 4, a water inlet pipe 18 fixedly mounted on the right side of the upper mold 4, a water outlet pipe 19 fixedly mounted on the right side of the lower mold 2, a conveying pipe assembly connecting the left side of the lower mold 2 and the left side of the upper mold 4, a buffer assembly on the top of the mounting base 1, and the conveying pipe assembly including an upper connecting pipe 11 and a lower connecting pipe 12. 2. The upper connecting pipe 11 is fixedly installed on the left side of the upper mold 4, and the lower connecting pipe 12 is fixedly installed on the left side of the lower mold 2. Connecting rings 13 are fixedly installed at the bottom end of the upper connecting pipe 11 and the top end of the lower connecting pipe 12. Connecting threaded sleeves 14 are overlapped on the surfaces of the two connecting rings 13. The two connecting threaded sleeves 14 are slidably mounted on the surfaces of the upper connecting pipe 11 and the lower connecting pipe 12, respectively. Both the upper connecting pipe 11 and the lower connecting pipe 12 are bent pipes, and both are made of stainless steel. The radius of the upper connecting pipe 11 and the radius of the lower connecting pipe 12 are the same. A connecting threaded head 15 is provided inside the connecting threaded sleeve 14. The connecting threaded head 15 connects to the connecting threaded sleeve 14. A sealing gasket 16 is provided between the facing surfaces of the annular rings 13. The sealing gasket 16 has a circular structure and is made of elastic rubber. A bellows 17 is connected between the facing surfaces of the connecting screw heads 15. After the workpiece inside the lower mold 2 is injected, the external conveying equipment delivers water to the upper cooling chamber 5 through the water inlet pipe 18, and then into the lower cooling chamber 3 through the upper connecting pipe 11, the bellows 17, and the lower connecting pipe 12, thereby cooling the injected workpiece. When the bellows 17 is damaged, the connecting screw sleeve 14 is rotated, causing the connecting screw sleeve 14 to separate from the connecting screw head 15, and the bellows 17 is pulled to move the connecting screw head 15 out. The replacement bellows 17 is placed between the upper connecting pipe 11 and the lower connecting pipe 12. The connecting sleeve 14 is rotated so that it is connected to the connecting screw head 15 through the thread. The connecting ring 13 and the connecting screw head 15 compress the sealing gasket 16. The sealing gasket 16 rebounds and seals the gap between the connecting ring 13 and the connecting screw head 15, increasing the contact area between the cooling medium and the mold. By increasing the contact area, the heat dissipation speed is improved. This avoids the situation where the limited heat dissipation area cannot meet the rapid cooling requirements in some large or thick-walled molds, and avoids the problem of excessively long cooling time caused by excessively low cooling speed.

[0022] Preferably, the lifting and closing mold assembly includes a mounting column 6 fixedly installed on the top of the mounting base 1, a mounting plate 7 fixedly installed on the top of the mounting column 6, a hydraulic push rod 8 fixedly installed on the top of the mounting plate 7, a movable plate 9 fixedly installed at the output end of the hydraulic push rod 8, an upper mold 4 fixedly installed on the bottom of the movable plate 9, and a limit ring 10 fixedly installed on the surface of the movable plate 9. There are four mounting columns 6 and four limit rings 10, and the four mounting columns 6 and four limit rings 10 are arranged in a circular array. The limit rings 10 are slidably mounted on the surface of the mounting columns 6 and are hydraulically pushed... The output end of rod 8 drives the moving plate 9 to move downward. The moving plate 9 drives the limiting ring 10 to slide downward on the surface of the mounting column 6, so that the moving plate 9 drives the upper mold 4 to move downward. The upper mold 4 drives the upper connecting pipe 11 to move downward, so that the upper mold 4 pushes the sealing gasket 16 downward through the connecting ring 13. The sealing gasket 16 drives the connecting screw sleeve 14 downward through the connecting screw head 15, so that the bellows 17 folds and contracts, so that the upper mold 4 and the lower mold 2 close together. The raw material is transported into the lower mold 2 through the injection tube on the rear side of the lower mold 2.

[0023] Specifically, the buffer assembly includes a buffer spring 21 fixedly installed on the top of the mounting base 1. A buffer ring 20 is fixedly installed at the top of the buffer spring 21. The buffer ring 20 is slidably installed on the surface of the mounting column 6. When the moving plate 9 moves the upper mold 4 downward, the moving plate 9 causes the limiting ring 10 to contact the buffer ring 20, so that the limiting ring 10 pushes the buffer ring 20 to compress the buffer spring 21. The buffer spring 21 buffers the limiting ring 10, thereby reducing the impact force when the upper mold 4 and the lower mold 2 are closed, which is convenient for protecting the lower mold 2 and the upper mold 4 and avoids damage caused by excessive impact force between the lower mold 2 and the upper mold 4.

[0024] In use: After the workpiece inside the lower mold 2 is injection molded, the external conveying equipment delivers water to the upper cooling chamber 5 through the water inlet pipe 18. The water flows through the upper cooling chamber 5 into the upper connecting pipe 11, and then through the upper connecting pipe 11 into the bellows 17. Subsequently, it flows through the bellows 17 into the lower connecting pipe 12, allowing the water to flow through the lower connecting pipe 12 into the lower cooling chamber 3. The water flow in the lower cooling chamber 3 and the upper cooling chamber 5 simultaneously cools the lower mold 2 and the upper mold 4, thereby cooling the injection molded workpiece. If the bellows 17 is damaged, the connecting screw sleeve 14 is rotated, causing the connecting screw sleeve 14 to engage with the connecting screw head. Separate 15, pull the bellows 17, causing the bellows 17 to move along with the connecting screw head 15, so that the bellows 17 moves out from between the upper connecting pipe 11 and the lower connecting pipe 12, and place the replacement bellows 17 between the upper connecting pipe 11 and the lower connecting pipe 12. Rotate the connecting screw sleeve 14, so that the connecting screw sleeve 14 connects with the connecting screw head 15 through the thread, and the connecting ring 13 and the connecting screw head 15 compress the sealing gasket 16. The sealing gasket 16 rebounds and seals the gap between the connecting ring 13 and the connecting screw head 15, thereby completing the installation of the bellows 17, making the replacement of the bellows 17 more convenient and quick.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold with a cooling mechanism, comprising a mounting base (1), characterized in that, The mounting base (1) is fixedly provided with a lower mold (2) on the top. The lower mold (2) has a lower cooling cavity (3) inside. The mounting base (1) is provided with a lifting mold closing assembly on the top. The mounting base (1) is provided with an upper mold (4) on the top through the lifting mold closing assembly. The upper mold (4) has an upper cooling cavity (5) inside. The upper mold (4) is fixedly provided with a water inlet pipe (18) on the right side. The lower mold (2) is fixedly provided with a water outlet pipe (19) on the right side. A conveying pipe assembly is connected between the left side of the lower mold (2) and the left side of the upper mold (4). The mounting base (1) is provided with a buffer assembly on the top.

2. The injection mold with a cooling mechanism according to claim 1, characterized in that, The lifting and closing mold assembly includes a mounting column (6) fixedly installed on the top of the mounting base (1), a mounting plate (7) fixedly installed on the top of the mounting column (6), a hydraulic push rod (8) fixedly installed on the top of the mounting plate (7), a moving plate (9) fixedly installed at the output end of the hydraulic push rod (8), the upper mold (4) fixedly installed on the bottom of the moving plate (9), a limit ring (10) fixedly installed on the surface of the moving plate (9), and the limit ring (10) slidably installed on the surface of the mounting column (6).

3. The injection mold with a cooling mechanism according to claim 1, characterized in that, The conveying pipe assembly includes an upper connecting pipe (11) and a lower connecting pipe (12). The lower connecting pipe (12) is fixedly installed on the left side of the upper mold (4) and the lower connecting pipe (12) is fixedly installed on the left side of the lower mold (2). A connecting ring (13) is fixedly provided at the bottom end of the upper connecting pipe (11) and the top end of the lower connecting pipe (12). A connecting threaded sleeve (14) is provided on the surface of the two connecting rings (13). The two connecting threaded sleeves (14) are slidably provided on the surface of the upper connecting pipe (11) and the surface of the lower connecting pipe (12). A connecting threaded head (15) is provided inside the connecting threaded sleeve (14). A sealing gasket (16) is provided between the facing surfaces of the connecting threaded head (15) and the connecting ring (13). A corrugated pipe (17) is connected between the facing surfaces of the connecting threaded head (15).

4. An injection mold with a cooling mechanism according to claim 2, characterized in that, The buffer assembly includes a buffer spring (21) fixedly installed on the top of the mounting base (1), and a buffer ring (20) is fixedly provided on the top of the buffer spring (21). The buffer ring (20) is slidably disposed on the surface of the mounting column (6).

5. An injection mold with a cooling mechanism according to claim 2, characterized in that, The number of the mounting columns (6) and the limiting rings (10) are both four, and the four mounting columns (6) and the four limiting rings (10) are arranged in a circular array.

6. An injection mold with a cooling mechanism according to claim 3, characterized in that, Both the upper connecting pipe (11) and the lower connecting pipe (12) are bent pipes. Both the upper connecting pipe (11) and the lower connecting pipe (12) are made of stainless steel. The radius of the upper connecting pipe (11) and the radius of the lower connecting pipe (12) are the same.

7. An injection mold with a cooling mechanism according to claim 3, characterized in that, The sealing gasket (16) has a circular structure and is made of elastic rubber.

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