Blowing type diffusion ejection structure of injection mold

Abstract

The utility model discloses an injection mold blowing type diffusion ejection structure which comprises a fixing cylinder inserted in the surface of an injection molding male mold, a fixing piece used for fixing the fixing cylinder is arranged on the back of the injection molding male mold, and an opening of the fixing cylinder is connected with an air inlet pipe used for being connected with air source equipment through a detachable assembly. A limiting ring is slidably connected into the fixing cylinder, one end of the limiting ring is fixedly connected with an ejection pipe, one end of the ejection pipe slidably penetrates through the end of the fixing cylinder in a sealed mode, one end of the ejection pipe is arranged in a sealed mode, and a plurality of sets of air injection holes arranged in an annular array mode are formed in the surface of the rear portion of the ejection pipe. After gas enters the ejection pipe, residual injection molding slag on the surface of the injection molding male mold can be blown away, the cleanliness of the surface of the mold is guaranteed, the quality of subsequent injection molding machining is improved, manual intervention is not needed, the cleaning time is greatly saved, the mold can enter the next injection molding cycle more quickly, and the overall production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of air-blowing diffusion ejection structure for injection molds, specifically an air-blowing diffusion ejection structure for injection molds. Background Technology

[0002] For large, thin-walled products such as buckets, lids, and boxes, traditional ejector pin methods can easily leave marks on the product surface or cause product deformation. However, the air-blowing diffusion ejector structure can apply ejection force evenly, effectively avoiding these problems and ensuring the product's appearance quality and dimensional accuracy.

[0003] Chinese Patent CN221022175U discloses an air blowing device for injection molds, belonging to the field of injection mold technology. It addresses the problem that existing air blowing devices easily eject molded parts directly during demolding, resulting in inconsistent part placement and hindering subsequent collection. The device includes an injection punch, an injection molded part, a driving air chamber, a connecting air pipe, an air blowing ejection mechanism, and an ejection guide mechanism. The injection molded part is fixedly connected to the front of the injection punch; the driving air chamber is fixedly connected to the rear of the injection punch; the connecting air pipe is fixedly connected to the rear of the driving air chamber, with its rear end connected to an external air pump; the air blowing ejection mechanism is located in the middle of the injection punch's interior; and the ejection guide mechanism is located inside the injection punch, preventing the molded part from sticking to the ejector, thus guiding the molded part, ensuring its placement, and facilitating collection.

[0004] The air blowing device for the injection mold described above has some problems in use. Although it avoids the sticking of the injection molded part and the ejector, realizes the guiding function of the injection molded part, ensures the drop position of the injection molded part, and facilitates the collection of the injection molded part, it cannot clean the plastic residue left inside the mold while ejecting the injection molded part, so manual cleaning by the staff is required. Utility Model Content

[0005] The purpose of this invention is to provide an air-blowing diffusion ejection structure for injection molds to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An air-blowing diffusion ejection structure for injection molds includes a fixed cylinder inserted into the surface of an injection punch. A fixing member is provided on the back of the injection punch for fixing the fixed cylinder. An air inlet pipe for connecting to an air source device is connected to the opening of the fixed cylinder via a detachable component. A limiting ring is slidably connected inside the fixed cylinder. An ejection tube is fixedly connected to one end of the limiting ring. One end of the ejection tube slidably seals through the end of the fixed cylinder, and one end of the ejection tube is sealed. A plurality of air jet holes arranged in a ring array are opened on the rear surface of the ejection tube. A pressure-limiting component is provided in the inner cavity of the limiting ring to allow air to enter the ejection tube only when the air pressure in the fixed cylinder reaches a certain level.

[0008] As a preferred technical solution, the pressure limiting component is fixedly installed on the mounting bracket at the other end of the limiting ring. A connecting rod is inserted into the middle surface of the mounting bracket. The end of the connecting rod extends into the inner cavity of the ejector tube and is fixedly connected to a sealing disc for sealing the inner cavity of the limiting ring. The other end of the connecting rod is provided with a pulling component that pulls the sealing disc outward to ensure the sealing degree of the sealing disc to the inner cavity of the limiting ring.

[0009] As a preferred technical solution, the pulling assembly includes a tray fixedly connected to the other end of the connecting rod, and a conical spring is sleeved on the surface of the connecting rod located between the tray and the mounting bracket.

[0010] As a preferred technical solution, the upper and lower parts of the limiting ring near the fixed cylinder are fixedly connected to push rods. The ends of the upper and lower sets of push rods respectively penetrate the fixed cylinder and are fixedly connected to a disc. A first spring is sleeved on the surface between the disc and the end of the fixed cylinder.

[0011] As a preferred technical solution, the detachable component includes a threaded ring threaded to the fixed cylinder opening, and the inner cavity of the threaded ring is connected to the end of the air intake pipe.

[0012] As a preferred technical solution, the fixing component includes a fixing ring that is fixedly installed on the back of the injection mold and located at a corresponding position on the outer circular surface of the fixing cylinder. The surface of the fixing ring is threaded with several sets of fixing bolts, and the several sets of fixing bolts are arranged in a circular array.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the setting of the air jet hole, can blow away the residual injection slag on the surface of the injection punch after the gas enters the ejector pipe, ensuring the cleanliness of the mold surface, which is beneficial to the quality of subsequent injection molding. Moreover, no manual intervention is required, which greatly saves cleaning time and allows the mold to enter the next injection cycle more quickly, thus improving the overall production efficiency.

[0015] 2. This utility model uses a pressure limiting component to seal the inner cavity of the limiting ring with a sealing disc. When the air pressure does not reach the set value, it prevents gas from entering the ejector tube. Only when the air pressure overcomes the pulling force of the pulling component will the sealing disc move, allowing gas to enter the ejector tube. This achieves precise air pressure control and ensures a large airflow through pressure limiting, which can improve the cleaning effect on the surface of the injection mold.

[0016] 3. This utility model, through the setting of the fixing component, has a fixing ring installed on the back of the injection punch, corresponding to the outer circular surface of the fixing cylinder. By tightening the fixing bolts arranged in a ring array, the fixing cylinder can be secured from multiple directions, ensuring the stability of the fixing cylinder installation and preventing displacement or shaking of the fixing cylinder during injection and ejection, thereby ensuring the normal operation of the entire ejection structure. Furthermore, the fixing bolts can be loosened and the fixing cylinder can be pulled outward, thereby adjusting the ejection distance of the ejection tube. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an air-blowing diffusion ejection structure for an injection mold according to the present invention;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is a cross-sectional view of the fixing cylinder of this utility model;

[0020] Figure 4 This is a cross-sectional view of the ejector tube of this utility model.

[0021] In the picture:

[0022] 100. Injection punch; 101. Retaining ring; 102. Fixing bolt;

[0023] 200. Fixed cylinder; 201. Ejector tube; 202. Air inlet pipe; 203. Disc; 204. First spring; 205. Push rod; 206. Threaded ring; 207. Air jet hole; 208. Limiting ring;

[0024] 300. Mounting bracket; 301. Connecting rod; 302. Tray; 303. Conical spring; 304. Sealing disc. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-4 This embodiment provides an air-blowing diffusion ejection structure for an injection mold, including a fixed cylinder 200 inserted into the surface of an injection punch 100. A fixing member for fixing the fixed cylinder 200 is provided on the back of the injection punch 100. An air inlet pipe 202 for connecting to an air source device is connected to the opening of the fixed cylinder 200 via a detachable component. A limit ring 208 is slidably connected inside the fixed cylinder 200. An ejection pipe 201 is fixedly connected to one end of the limit ring 208. One end of the ejection pipe 201 slides through the end of the fixed cylinder 200 in a sealed manner, allowing for ejection. The rear surface of the tube 201 is provided with several sets of air jet holes 207 arranged in a ring array. The inner cavity of the limiting ring 208 is provided with a pressure limiting component to allow air to enter the ejector tube 201 only when the air pressure in the fixed cylinder 200 reaches a certain pressure. Through the setting of the air jet holes 207, the residual injection slag on the surface of the injection punch 100 can be blown away after the gas enters the ejector tube 201, ensuring the cleanliness of the mold surface, which is beneficial to the quality of subsequent injection molding. Moreover, no manual intervention is required, which greatly saves cleaning time and allows the mold to enter the next injection cycle more quickly, thus improving the overall production efficiency.

[0027] The pressure limiting component is fixedly installed on the mounting bracket 300 at the other end of the limiting ring 208. A connecting rod 301 is inserted into the middle surface of the mounting bracket 300. The end of the connecting rod 301 extends into the inner cavity of the ejector tube 201 and is fixedly connected to a sealing disc 304 for sealing the inner cavity of the limiting ring 208. The other end of the connecting rod 301 is provided with a pulling component that pulls the sealing disc 304 outward to ensure the sealing degree of the sealing disc 304 to the inner cavity of the limiting ring 208. Through the setting of the pressure limiting component, the sealing disc 304 seals the inner cavity of the limiting ring 208, preventing gas from entering the ejector tube 201 when the air pressure does not reach the set value. Only when the air pressure overcomes the pulling force of the pulling component will the sealing disc 304 move, allowing gas to enter the ejector tube 201. This achieves precise air pressure control and ensures a large airflow through pressure limiting, which can improve the cleaning effect on the surface of the injection mold 100.

[0028] The pulling assembly includes a tray 302 fixedly connected to the other end of the connecting rod 301. A conical spring 303 is sleeved on the surface of the connecting rod 301 located between the tray 302 and the mounting bracket 300. With the pulling assembly, when the air pressure reaches a certain value, the air pressure can overcome the elastic force of the conical spring 303 to push the sealing disc 304, thereby achieving the pressure limiting function. At the same time, the conical spring 303 has good stability during compression and recovery, ensuring the repeated use performance of the pressure limiting assembly. Furthermore, it ensures the sealing degree of the sealing disc 304 to the inner cavity of the limiting ring 208, preventing gas leakage and improving the reliability of the pressure limiting assembly.

[0029] Among them, the upper and lower parts of the limiting ring 208 near the fixed cylinder 200 are fixedly connected to push rods 205. The ends of the upper and lower push rods 205 respectively pass outward through the fixed cylinder 200 and are fixedly connected to the disc 203. A first spring 204 is sleeved on the surface between the disc 203 and the end of the fixed cylinder 200. With the setting of the first spring 204, when the ejector tube 201 moves, the push rod 205 drives the disc 203 to move, so that the first spring 204 is compressed. At the same time, the first spring 204 plays a role in buffering and energy storage during the ejection process. After the air source equipment is turned off, the elastic force of the first spring 204 can push the ejector tube 201 and the limiting ring 208 back to the initial position, realizing automatic reset.

[0030] The detachable component includes a threaded ring 206 threaded to the opening of the fixed cylinder 200. The inner cavity of the threaded ring 206 is connected to the end of the air inlet pipe 202. By rotating the threaded ring 206, the air inlet pipe 202 can be easily connected or disconnected from the fixed cylinder 200, which facilitates the replacement, cleaning or maintenance of the interior of the fixed cylinder 200 and the air inlet pipe 202, and also facilitates the connection and disconnection of the air source equipment.

[0031] The fastener includes a fixing ring 101 fixedly installed on the back of the injection punch 100 and located at a corresponding position on the outer circular surface of the fixing cylinder 200. The surface of the fixing ring 101 is threaded with several sets of fixing bolts 102, which are arranged in a ring array. Through the fastener, the fixing ring 101 is installed on the back of the injection punch 100 and corresponds to the outer circular surface of the fixing cylinder 200. By tightening the fixing bolts 102 arranged in a ring array, the fixing cylinder 200 can be fastened from multiple directions, ensuring the stability of the fixing cylinder 200 installation and preventing displacement or shaking of the fixing cylinder 200 during injection and ejection, thereby ensuring the normal operation of the entire ejection structure. Furthermore, the fixing bolts 102 can be loosened and the fixing cylinder 200 can be pulled outward, thereby adjusting the ejection distance of the ejector tube 201.

[0032] Working principle;

[0033] First, insert the fixing cylinder 200 into the inside of the fixing ring 101 and tighten several sets of fixing bolts 102 to fix the fixing cylinder 200, thereby achieving a stable installation of the fixing cylinder 200.

[0034] At this point, remove the air intake pipe 202, and thread the threaded ring 206 at the end of the air intake pipe 202 to the opening of the fixed cylinder 200, and connect the air source device to the inner cavity of the air intake pipe 202 through the conduit.

[0035] In the initial state, the limiting ring 208 is located inside the fixed cylinder 200, and one end of the ejector tube 201 is flush with the end of the fixed cylinder 200.

[0036] After the injection molding process is completed, the air source equipment is started. The gas enters the fixed cylinder 200 through the air inlet pipe 202, thereby pushing the ejector pipe 201 outward, thereby ejecting the injection part from the surface of the injection punch 100. At the same time as the ejector pipe 201 moves, it drives the push rod 205 to move together and compresses the first spring 204 outside the fixed cylinder 200.

[0037] As the gas pressure inside the fixed cylinder 200 gradually increases, when the pressure reaches the pressure value set by the pressure limiting component, the gas pressure overcomes the elastic force of the conical spring 303 and pushes the sealing disc 304, causing the connecting rod 301 to drive the sealing disc 304 to move away from the inner cavity of the limiting ring 208. At this time, the inner cavity of the limiting ring 208 is connected to the ejector pipe 201, and the gas begins to enter the ejector pipe 201.

[0038] Thus, the gas entering the ejector pipe 201 is ejected from the jet hole 207 to blow away the residual injection slag on the surface of the injection punch 100. Then, the gas source equipment is turned off, and the ejector pipe 201 returns to its original position under the push of the first spring 204, so that the operator can perform another injection molding process.

[0039] 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 blow-type diffusion ejection structure for injection molds, characterized in that, The device includes a fixed cylinder (200) inserted into the surface of an injection punch (100). The back of the injection punch (100) is provided with a fixing member for fixing the fixed cylinder (200). The opening of the fixed cylinder (200) is connected to an air inlet pipe (202) for connecting to an air source device via a detachable component. A limiting ring (208) is slidably connected inside the fixed cylinder (200). One end of the limiting ring (208) is fixedly connected to an ejector pipe (201). One end of the ejector pipe (201) slides through the end of the fixed cylinder (200) in a sealed manner. One end of the ejector pipe (201) is sealed. Several sets of air jet holes (207) arranged in a ring array are opened on the rear surface of the ejector pipe (201). The inner cavity of the limiting ring (208) is provided with a pressure limiting component for allowing air to enter the ejector pipe (201) only when the air pressure in the fixed cylinder (200) reaches a certain pressure.

2. The injection mold blowing-type diffusion ejection structure according to claim 1, characterized in that: The pressure limiting component is fixedly installed on the mounting bracket (300) at the other end of the limiting ring (208). A connecting rod (301) is inserted into the middle surface of the mounting bracket (300). The end of the connecting rod (301) extends into the inner cavity of the ejector tube (201) and is fixedly connected to a sealing disc (304) for sealing the inner cavity of the limiting ring (208). The other end of the connecting rod (301) is provided with a pulling component that pulls the sealing disc (304) outward to ensure the sealing degree of the sealing disc (304) to the inner cavity of the limiting ring (208).

3. The injection mold blowing diffusion ejection structure according to claim 2, characterized in that: The pulling assembly includes a tray (302) fixedly connected to the other end of the connecting rod (301), and a conical spring (303) is sleeved on the surface of the connecting rod (301) located between the tray (302) and the mounting bracket (300).

4. The injection mold blowing diffusion ejection structure according to claim 3, characterized in that: The limiting ring (208) is fixedly connected to push rods (205) at both the upper and lower ends near the fixed cylinder (200). The ends of the upper and lower push rods (205) pass outward through the fixed cylinder (200) and are fixedly connected to a disc (203). A first spring (204) is sleeved on the surface between the disc (203) and the end of the fixed cylinder (200).

5. The injection mold blowing diffusion ejection structure according to claim 1, characterized in that: The detachable component includes a threaded ring (206) threaded to the opening of the fixed cylinder (200), the inner cavity of which is connected to the end of the air inlet pipe (202).

6. The injection mold blowing diffusion ejection structure according to claim 1, characterized in that: The fastener includes a fixing ring (101) that is fixedly installed on the back of the injection punch (100) and located at a corresponding position on the outer circular surface of the fixing cylinder (200). The surface of the fixing ring (101) is threaded with a number of fixing bolts (102), and the number of fixing bolts (102) are arranged in a ring array.

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