Quick release type injection mold structure

Abstract

The utility model discloses a quick release type injection mold structure, and relates to the technical field of injection molds. The quick-release injection mold structure comprises a bottom plate, an injection molding mechanism is arranged above the bottom plate, and the driving assembly is arranged above the bottom plate and used for adjusting opening and closing of a mold; the air guide assembly comprises an air compressor arranged on one side of the bottom plate, reversing valves are fixedly installed at the air inlet end and the air outlet end of the air compressor, an air inlet pipe is fixedly installed at the right end of the reversing valve at the air outlet end of the air compressor, and an exhaust pipe is fixedly installed at the right end of the reversing valve at the air inlet end of the air compressor. The air compressor can convey external air into the air inlet pipe, so that the air pressure in the air inlet pipe is increased so as to drive the sealing column to move towards the interior of the mold cavity, when the disc-shaped structure at the rear end of the sealing column is not embedded with the movable mold, air can enter the space between the inner wall of the movable mold and the injection molding part, and the injection molding part falls off in the movable mold under the air pressure; and the effect of rapid demolding is achieved through airflow.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a quick-release injection mold structure. Background Technology

[0002] Injection molding is a method of industrial product manufacturing. Products are typically manufactured using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting. An injection molding machine (or simply injection molding machine) is the main molding equipment used to create various shapes of plastic products from thermoplastic or thermosetting materials using plastic molds. Injection molding is achieved through an injection molding machine and a mold. An injection mold is a tool for producing plastic products; it is also a tool that gives plastic products their complete structure and precise dimensions.

[0003] The existing Chinese utility model patent with publication number CN214294206U discloses a quick-release active venting structure injection mold, including a base plate. A mold base is fixedly connected to the top of the base plate via a vibration spring rod. A fixed mold base is fixedly connected to the left side of the top of the mold base, and a movable mold base is slidably connected to the right side of the top of the mold base. Vibration motors are fixed to the front of both the fixed and movable mold bases. Fixed lugs are fixedly connected to the front and back of both the fixed and movable mold bases, and adjacent fixed lugs are fixedly connected by fixing bolts. A fixed mold cavity is opened on the right side of the fixed mold base, and a movable mold cavity is opened on the left side of the movable mold base. This utility model relates to the field of injection mold technology. This quick-release active venting structure injection mold, through the active venting mechanism, facilitates the active removal of gas from the fixed and movable mold cavities, effectively preventing defects such as burning, poor filling, surface damage, and bubbles, thereby improving product quality.

[0004] During the demolding process, the molded part may get stuck inside the mold, making it difficult to remove the mold quickly. Furthermore, its active venting structure has a small gas throughput. During injection molding, the amount of gas discharged is much less than the amount of molten plastic entering, affecting venting efficiency. During injection molding, the molten plastic will deposit at the bottom of the mold cavity under the action of gravity and gradually rise. During the rising process, the molten plastic will cause the gas to be above the molten plastic. However, since the venting pipes of the mold structure are located on both sides of the moving mold and the fixed mold, when the top surface of the molten plastic is higher than the venting pipe, the venting pipe will not be able to discharge the gas. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a quick-release injection mold structure, which solves the problems of the gas discharge rate not matching the molten plastic inflow rate and the cumbersome mold assembly and disassembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A quick-release injection mold structure includes a base plate, and an injection molding mechanism is disposed above the base plate.

[0007] A drive assembly, located above the base plate, is used to adjust the opening and closing of the mold;

[0008] The air guiding assembly includes an air compressor mounted on one side of the base plate. A reversing valve is fixedly installed at the air inlet and outlet ends of the air compressor. An air inlet pipe is fixedly installed at the right end of the air compressor outlet reversing valve, and an exhaust pipe is fixedly installed at the right end of the air compressor inlet reversing valve. A connecting pipe is fixedly installed at the top of the exhaust pipe. A limit ring is fixedly installed inside the connecting pipe. A plug is inserted through the center of the limit ring, and a return spring is inserted through the outside of the plug. The air guiding assembly also includes a limiting frame fixedly installed inside the drive assembly. A sealing column is movably installed at the center of the limiting frame, and a limiting spring is inserted through the outside of the sealing column.

[0009] Preferably, the drive assembly includes a guide column and a slide rail fixedly installed above the base plate, and a hydraulic cylinder on the rear side of the base plate. A linear bearing is inserted and installed on the outer side of the guide column. A moving mold is fixedly installed at the front end of the hydraulic cylinder. A fixed mold is fixedly installed at the front end of the guide column. A sealing ring is fitted and installed on the rear side of the fixed mold.

[0010] Preferably, the top end of the air inlet pipe has two branches, which are respectively connected to the opening structure on the front side of the fixed mold. The connecting pipe is fixedly installed on the top end of the fixed mold and passes through the fixed mold to communicate with the internal mold cavity of the fixed mold.

[0011] Preferably, the bottom end of the inner wall of the connecting pipe is provided with a beveled structure, the bottom of the plug is fitted with the beveled structure of the inner wall of the connecting pipe, and the bottom end of the plug is flush with the bottom end of the connecting pipe.

[0012] Preferably, the reset spring is located between the plug and the limiting ring, the surface of the limiting ring is provided with an opening structure, the plug and the limiting ring are slidably connected, and the limiting frame is fixedly connected to the fixed mold.

[0013] Preferably, the rear end of the sealing post is fitted into the front side of the fixed mold cavity, and the rear end is flush with the front side of the fixed mold cavity. The sealing post and the limiting frame form a sliding connection. The rear end of the limiting spring is fixedly connected to the fixed mold, and the front end is fixedly connected to the limiting post.

[0014] Beneficial effects

[0015] This utility model provides a quick-release injection mold structure. Compared with the prior art, it has the following advantages:

[0016] Beneficial effects:

[0017] (1) The quick-release injection mold structure, through the setting of the air compressor, the air compressor can extract the air inside the exhaust pipe. Since the top of the exhaust pipe is fixedly connected to the top of the connecting pipe, the connecting pipe passes through the top of the fixed mold and communicates with the internal mold cavity. When the air compressor is not started, it can extract the air inside the exhaust pipe, so that the air pressure inside the connecting pipe is reduced. After the air pressure inside the connecting pipe is reduced, the air pressure inside the mold cavity will cause the plug to move upward and squeeze the return spring, so that the bottom end of the plug cannot contact the bottom inclined structure of the inner wall of the connecting pipe. The air inside the mold cavity will enter the connecting pipe and enter the exhaust pipe through the opening structure of the limiting ring and finally be discharged. This method can extract the air inside the mold cavity before injection into the mold cavity, so that the mold cavity is in a negative pressure state, and continue to extract the air during the injection process to quickly discharge the air inside the mold cavity.

[0018] (2) In this quick-release injection mold structure, through the setting of the sealing column, during the process of removing the injection molded part after cooling, the reversing valve at the bottom of the exhaust pipe controls the air compressor's air intake end to connect with the outside, and the reversing valve at the bottom of the air intake pipe controls the air compressor's air intake end to connect with the air intake pipe. At this time, the air compressor can deliver external air to the inside of the air intake pipe, causing the air pressure inside the air intake pipe to rise, thereby driving the sealing column to move into the mold cavity. When the disc-shaped structure at the rear end of the sealing column is not fitted with the moving mold, the gas can enter between the inner wall of the moving mold and the injection molded part. The injection molded part will fall out inside the moving mold under the gas pressure, and the effect of quick demolding is achieved through airflow. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the hydraulic cylinder installation structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the moving mold installation structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the exhaust pipe installation structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the plug installation structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the installation structure of the limiting spring of this utility model;

[0025] In the diagram: 1. Base plate; 2. Injection molding mechanism; 21. Drive assembly; 211. Guide column; 212. Slide rail; 213. Hydraulic cylinder; 214. Linear bearing; 215. Moving mold; 216. Fixed mold; 217. Sealing ring; 22. Air guide assembly; 221. Air compressor; 222. Reversing valve; 223. Inlet pipe; 224. Exhaust pipe; 225. Connecting pipe; 226. Limiting ring; 227. Plug; 228. Return spring; 229. Limiting frame; 2210. Sealing column; 2211. Limiting spring. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-6 This utility model provides a technical solution: a quick-release injection mold structure, including a base plate 1, and an injection molding mechanism 2 is arranged above the base plate 1.

[0028] A drive assembly 21 is disposed above the base plate 1 for adjusting the opening and closing of the mold. The drive assembly 21 includes a guide column 211 and a slide rail 212 fixedly installed above the base plate 1, and a hydraulic cylinder 213 on the rear side of the base plate 1. A linear bearing 214 is inserted and installed on the outer side of the guide column 211. A moving mold 215 is fixedly installed at the front end of the hydraulic cylinder 213. A fixed mold 216 is fixedly installed at the front end of the guide column 211. A sealing ring 217 is fitted and installed on the rear side of the fixed mold 216.

[0029] Specifically, the moving mold 215 is slidably connected to the guide post 211 via the linear bearing 214, and its bottom end is fixedly connected to the slider above the slide rail 212. The guide post 211 and the slide rail 212 restrict the movement direction of the moving mold 215 so that the protruding structure at the front end of the moving mold 215 can fit into the fixed mold 216, so that the moving mold 215 and the fixed mold 216 can form a mold cavity to restrict the shape of the injection molded part. The hydraulic cylinder 213 can drive the moving mold 215 to move and provide a certain pressure to the moving mold 215 during the injection process. The hydraulic cylinder 213 can realize the quick assembly and disassembly of the moving mold 214 and the fixed mold 216. The sealing ring 217 can play a sealing role. A half-tubular structure is provided on one side of the top of the moving mold 215 and the fixed mold 216. After fitting, it can form a pipe to allow the molten plastic to enter the mold cavity.

[0030] The air guiding assembly 22 includes an air compressor 221 disposed on one side of the base plate 1. A reversing valve 222 is fixedly installed at both the inlet and outlet ends of the air compressor 221. An inlet pipe 223 is fixedly installed at the right end of the outlet reversing valve 222 of the air compressor 221. An exhaust pipe 224 is fixedly installed at the right end of the inlet reversing valve 222 of the air compressor 221. A connecting pipe 225 is fixedly installed at the top end of the exhaust pipe 224. A limit ring 226 is fixedly installed inside the connecting pipe 225. A plug 227 is inserted through the center of the limiting ring 226, and a return spring 228 is inserted through the outer side of the plug 227. The air guiding assembly 22 also includes a limiting frame 229 fixedly installed inside the drive assembly 21. A sealing post 2210 is movably installed at the center of the limiting frame 229, and a limiting spring 2211 is inserted through the outer side of the sealing post 2210. The top end of the air inlet pipe 223 has two branches, which are respectively connected to the opening structure on the front side of the fixed mold 216. The connecting pipe 225 is fixedly installed at the top of the fixed mold 216 and penetrates the fixed mold 216, communicating with the internal cavity of the fixed mold 216. The bottom end of the inner wall of the connecting pipe 225 has a beveled structure. The bottom of the plug 227 fits into the beveled structure of the inner wall of the connecting pipe 225, and the bottom end of the plug 227 is flush with the bottom end of the connecting pipe 225. The return spring 228 is located between the plug 227 and the limiting ring 226. The surface of the limiting ring 226 has an opening structure. A sliding connection is formed between the limiting ring 226 and the limiting frame 229. The limiting frame 229 is fixedly connected to the fixed mold 216. The rear end of the sealing column 2210 is fitted with the front side surface of the mold cavity of the fixed mold 216, and the rear end is flush with the front side surface of the mold cavity of the fixed mold 216. A sliding connection is formed between the sealing column 2210 and the limiting frame 229. The rear end of the limiting spring 2211 is fixedly connected to the fixed mold 216, and the front end is fixedly connected to the limiting column. At the same time, the internal depth of the mold cavity of the moving mold 215 is less than the depth of the mold cavity of the fixed mold 216.

[0031] Specifically, the air compressor 221 can extract air from the exhaust pipe 224. Since the top of the exhaust pipe 224 is fixedly connected to the top of the connecting pipe 225, which passes through the top of the fixed mold 216 and communicates with the internal mold cavity, the air compressor 221 can extract air from the exhaust pipe 224 when it is not running, thus reducing the air pressure inside the connecting pipe 225. After the air pressure inside the connecting pipe 225 decreases, the air pressure inside the mold cavity will cause the plug 227 to move upward and squeeze the return spring 228, preventing the bottom of the plug 227 from contacting the inclined structure at the bottom of the inner wall of the connecting pipe 225. The air inside the mold cavity will then enter the connecting pipe 225 and enter the exhaust pipe 224 through the opening structure of the limiting ring 226, eventually being discharged. During the exhaust phase, the reversing valve 222 at the bottom of the exhaust pipe 224 controls the connection between the exhaust pipe 224 and the air compressor 221. The air end is connected, and the reversing valve 222 at the bottom of the air inlet pipe 223 controls the air compressor 221 to connect with the outside, thereby venting the air inside the mold cavity. During the process of removing the injection molded part after cooling, the reversing valve 222 at the bottom of the exhaust pipe 224 controls the air compressor 221 to connect with the outside, and the reversing valve 222 at the bottom of the air inlet pipe 223 controls the air compressor 221 to connect with the air inlet pipe 223. At this time, the air compressor 221 can deliver external air to the inside of the air inlet pipe 223, causing the air pressure inside the air inlet pipe 223 to rise, thereby driving the sealing column 2210 to move into the mold cavity. When the disc-shaped structure at the rear end of the sealing column 2210 is not engaged with the moving mold 215, the gas can enter between the inner wall of the moving mold 215 and the injection molded part. The injection molded part will fall out of the moving mold 215 under the pressure of the gas, achieving the effect of rapid demolding through airflow.

[0032] Specifically, the hydraulic cylinder 213 is model HSG-90*600-FA-d60, the air compressor 221 is model HW71, and the directional valve 222 is model WGR2-3-WG230. In addition, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] During operation, the air compressor 221 extracts air from the exhaust pipe 224. Since the top of the exhaust pipe 224 is fixedly connected to the top of the connecting pipe 225, which passes through the top of the fixed mold 216 and communicates with the internal mold cavity, the air compressor 221 can extract air from the exhaust pipe 224 when not in operation, causing a decrease in air pressure inside the connecting pipe 225. This decrease in air pressure inside the connecting pipe 225 causes the pressure inside the mold cavity to move the plug 227 upwards, compressing the return spring 228. This prevents the bottom of the plug 227 from contacting the inclined structure at the bottom of the inner wall of the connecting pipe 225. Air from inside the mold cavity then enters the connecting pipe 225 and, through the opening structure of the limiting ring 226, enters the exhaust pipe 224 and is finally discharged. This method allows air to be extracted from the mold cavity before injection molding. This creates a negative pressure inside the mold cavity and continuously extracts air during the injection process to quickly expel the air from the mold cavity. During the removal of the injection molded part after cooling, the reversing valve 222 at the bottom of the exhaust pipe 224 controls the air intake end of the air compressor 221 to connect with the outside, and the reversing valve 222 at the bottom of the air intake pipe 223 controls the air intake end of the air compressor 221 to connect with the air intake pipe 223. At this time, the air compressor 221 can deliver external air to the inside of the air intake pipe 223, increasing the air pressure inside the air intake pipe 223, thereby driving the sealing column 2210 to move into the mold cavity. When the disc-shaped structure at the rear end of the sealing column 2210 is not engaged with the moving mold 215, the gas can enter between the inner wall of the moving mold 215 and the injection molded part. The injection molded part will fall out of the moving mold 215 under the pressure of the gas, achieving a rapid demolding effect through airflow.

[0034] 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.

[0035] 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. A quick release injection mold structure comprising a base plate (1), characterized in that: An injection molding mechanism (2) is provided above the base plate (1): A drive assembly (21) is located above the base plate (1) for adjusting the opening and closing of the mold; The air guiding assembly (22) includes an air compressor (221) disposed on one side of the base plate (1). A reversing valve (222) is fixedly installed at the air inlet and outlet ends of the air compressor (221). An inlet pipe (223) is fixedly installed at the right end of the reversing valve (222) at the outlet end of the air compressor (221). An exhaust pipe (224) is fixedly installed at the right end of the reversing valve (222) at the air inlet end of the air compressor (221). A connecting pipe (225) is fixedly installed at the top end of the exhaust pipe (224). (225) has a fixed limiting ring (226) installed inside. A plug (227) is inserted through the center of the limiting ring (226). A return spring (228) is inserted through the outside of the plug (227). The air guide assembly (22) also includes a limiting frame (229) fixedly installed inside the drive assembly (21). A sealing column (2210) is movably installed at the center of the limiting frame (229). A limiting spring (2211) is inserted through the outside of the sealing column (2210).

2. The quick release injection mold structure of claim 1, wherein: The drive assembly (21) includes a guide column (211) and a slide rail (212) fixedly installed above the base plate (1), and a hydraulic cylinder (213) on the rear side of the base plate (1). A linear bearing (214) is inserted and installed on the outer side of the guide column (211). A moving mold (215) is fixedly installed at the front end of the hydraulic cylinder (213). A fixed mold (216) is fixedly installed at the front end of the guide column (211). A sealing ring (217) is fitted and installed on the rear side of the fixed mold (216).

3. The quick release injection mold structure of claim 1, wherein: The top end of the air inlet pipe (223) is provided with two branches, which are respectively connected to the opening structure on the front side of the fixed mold (216). The connecting pipe (225) is fixedly installed on the top end of the fixed mold (216) and passes through the fixed mold (216) to communicate with the internal mold cavity of the fixed mold (216).

4. The quick release injection mold structure of claim 2, wherein: The bottom end of the inner wall of the connecting pipe (225) is provided with a sloping structure, the bottom of the plug (227) is fitted with the sloping structure of the inner wall of the connecting pipe (225), and the bottom end of the plug (227) is flush with the bottom end of the connecting pipe (225).

5. The quick release injection mold structure of claim 2, wherein: The reset spring (228) is located between the plug (227) and the limiting ring (226). The surface of the limiting ring (226) is provided with an opening structure. The plug (227) and the limiting ring (226) form a sliding connection. The limiting frame (229) is fixedly connected to the fixed mold (216).

6. The quick release injection mold structure of claim 2, wherein: The rear end of the sealing column (2210) is fitted with the front side of the mold cavity of the fixed mold (216), and the rear end is flush with the front side of the mold cavity of the fixed mold (216). The sealing column (2210) and the limiting frame (229) form a sliding connection. The rear end of the limiting spring (2211) is fixedly connected to the fixed mold (216), and the front end is fixedly connected to the limiting column.

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