High-precision flow control injection mold

Abstract

The utility model discloses a high-precision flow control injection mold, which belongs to the technical field of injection molds and comprises a mold main body, a plurality of heat flow channels are arranged in the mold main body, rotating grooves are formed in the bottom ends of the heat flow channels, a flow control disc is rotatably arranged in the rotating grooves, and a circle of flow control holes with different sizes are formed in the surface of the flow control disc. A plurality of flow control holes with different sizes are formed in the surface of the flow control disc, a closing opening is formed between any two adjacent flow control holes, the flow control holes with different sizes are formed in the surface of the flow control disc, the closing openings are formed between every two adjacent flow control holes, and when the closing openings need to be plugged, the plugging purpose can be achieved only by rotating the closing openings by a small angle; and the situation that when a closed opening needs to be blocked, the closed opening is far away from a corresponding flow control hole, so that the closed opening needs to pass through other flow control holes, too much thermoplastic materials flow in, and plastic products subjected to injection molding are unevenly filled can be effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a high-precision flow control injection mold. Background Technology

[0002] According to patent number CN202421473827.X, a high-precision flow control injection mold includes a mold body, an injection port on the mold body, a manifold plate inside the mold body, a hot runner cavity inside the manifold plate, a hot nozzle below the manifold plate, and a flow control component for controlling the flow rate of the hot nozzle. By setting the flow control component, a flow control plate is located inside the hot nozzle. When it is necessary to control the flow rate of the hot melt material ejected from the hot nozzle, a rotation drive component drives a rotating shaft to rotate, causing the flow control plate to rotate within the flow control cavity. Several different flow control holes are connected to the hot melt through-hole, thereby precisely controlling the flow rate of the hot melt material passing through the hot melt outlet channel. Furthermore, different orifice diameters of the flow control holes can be set as needed to adapt to the production of different injection molded products, effectively reducing uneven filling of the plastic product after injection molding.

[0003] The above solution still has certain technical defects in actual use. Because the flow control plate has multiple flow control holes on its surface that do not have adjacent closed openings, and the closed opening is only set at one place on the flow control plate, when the flow control hole that is far from the closed opening is closed, it will pass through other flow control holes between the flow control hole and the closed opening. As a result, when other flow control holes pass through the hot melt through hole, a small amount of thermoplastic fluid will pass through, which will affect the precise control of the thermoplastic fluid and reduce the accuracy of flow control. To address this, we propose a high-precision flow control injection mold. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision flow control injection mold to solve the existing problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision flow control injection mold, comprising a mold body, a flow control plate, flow control holes, and a closed opening. The mold body has multiple hot flow channels inside, with the bottom of each hot flow channel extending to the bottom of the mold body. The bottom end of each hot flow channel has a rotating groove, and a flow control plate is rotatably disposed inside the rotating groove. The surface of the flow control plate has a ring of flow control holes around its center position. The flow control holes on the flow control plate gradually increase in size in a clockwise direction. A closed opening is provided between any two adjacent flow control holes, and the position of each flow control hole corresponds to the hot flow channel.

[0006] Preferably, the top end and the bottom end of the communication of the rotating groove and the hot flow channel are provided with flow control plates, a through hole is formed in the center of the flow control plate, and the diameter of the through hole is greater than that of the flow control hole with the maximum diameter on the flow control plate.

[0007] Preferably, a transmission shaft is arranged at the center of the flow control plate, and the transmission shaft extends through the mold body to the top thereof and is movably connected to the mold body through bearings at both ends.

[0008] Preferably, a plurality of motors are arranged at the top of the mold body, and the output shaft ends of the motors are fixedly connected to the top of the transmission shaft at the corresponding positions.

[0009] Preferably, a hot nozzle is arranged at the bottom of the hot flow channel, and the hot nozzle is arranged at the bottom of the mold body.

[0010] Preferably, a material injection port is arranged at the center of the top of the mold body, and the bottom of the material injection port is in sealed communication with the plurality of hot flow channels.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. By arranging a plurality of flow control holes with different sizes on the surface of the flow control plate and arranging a closure between the two adjacent flow control holes, when the closure needs to be closed, only a small angle needs to be rotated to achieve the purpose of closing, so that when the closure needs to be closed, the distance between the closure and the corresponding flow control hole is effectively avoided to be far, so that the hot plastic material flows into too much through other flow control holes, and the filling of the plastic product after injection molding is uneven. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the multi-angle structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the flow control plate structure of the utility model.

[0017] In the figure: 1, mold body; 2, material injection port; 3, hot flow channel; 4, hot nozzle; 5, flow control plate; 6, flow control plate; 7, motor; 8, transmission shaft; 9, flow control hole; 10, closure; 11, rotating groove. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application.

[0019] Please refer to Figures 1-4 The present application provides a high-precision flow control injection mold technical scheme, which comprises a mold main body 1, a flow control disc 6, flow control holes 9 and a closing port 10. The mold main body 1 is internally provided with a plurality of hot flow channels 3, the bottom of the hot flow channel 3 extends to the bottom of the mold main body 1, the bottom end of the hot flow channel 3 is provided with a rotating groove 11, the rotating groove 11 is internally rotatably provided with the flow control disc 6, a plurality of flow control holes 9 are formed around the center of the flow control disc 6, the flow control holes 9 on the flow control disc 6 gradually increase in the clockwise direction, the closing port 10 is arranged between any two adjacent flow control holes 9, and the position of the flow control hole 9 corresponds to the hot flow channel 3.

[0020] Specifically, the top end and the bottom end of the communication part of the rotating groove 11 and the hot flow channel 3 are both provided with a flow control plate 5, a through hole is formed in the center of the flow control plate 5, and the hole diameter of the through hole is greater than the maximum hole diameter of the flow control hole 9 on the flow control disc 6.

[0021] Specifically, the center of the flow control disc 6 is provided with a transmission shaft 8, the transmission shaft 8 extends through the mold main body 1 to the top thereof and is movably connected to the mold main body 1 through bearings at both ends.

[0022] Specifically, the top of the mold main body 1 is provided with a plurality of motors 7, and the output shaft ends of the motors 7 are fixedly connected to the top of the transmission shaft 8 at the corresponding positions.

[0023] Specifically, the bottom of the hot flow channel 3 is provided with a hot nozzle 4, and the hot nozzle 4 is arranged at the bottom of the mold main body 1.

[0024] Specifically, the top center of the mold main body 1 is provided with a material injection port 2, and the bottom of the material injection port 2 is in sealed communication with the plurality of hot flow channels 3.

[0025] In the embodiment, when in use, the thermoplastic material is injected into the interior of the mold body 1 through the injection opening 2, flows to the hot nozzle 4 through the hot flow channel 3, and the flow rate is controlled through the flow control holes 9 on the flow control disc 6 in the top rotating groove 11. The motor 7 drives the transmission shaft 8 to rotate, which drives the flow control disc 6 to rotate. According to the different injection positions, the size of the flow control holes 9 at the corresponding positions is adjusted, so as to accurately control the flow of the thermoplastic material in the hot flow channel 3, so as to be suitable for the production of different host products. Since the closing opening 10 is arranged between each two adjacent flow control holes 9, when it is needed to block the closing opening 10, only a small angle needs to be rotated to achieve the blocking purpose, which can effectively avoid that when the closing opening 10 needs to be blocked, the position of the closing opening 10 is far away from the corresponding flow control hole 9, so that the thermoplastic material needs to flow through other flow control holes 9, thereby the thermoplastic material flows too much, and the plastic product after injection molding is filled unevenly.

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

Claims

1. A high-precision flow control injection mold, comprising a mold body (1), a flow control plate (6), a flow control hole (9), and a closing port (10), characterized in that: The mold body (1) is provided with multiple heat flow channels (3) inside. The bottom of the heat flow channel (3) extends to the bottom of the mold body (1). The bottom end of the heat flow channel (3) has a rotating groove (11). The rotating groove (11) is rotatably provided with a flow control plate (6). The surface of the flow control plate (6) is provided with a flow control hole (9) around the center position of the flow control plate (6). The flow control hole (9) on the flow control plate (6) gradually increases in a clockwise direction. A closed opening (10) is provided between any two adjacent flow control holes (9). The position of the flow control hole (9) corresponds to the heat flow channel (3).

2. The high-precision flow control injection mold according to claim 1, characterized in that: A flow control plate (5) is provided at the top and bottom of the connection between the rotating groove (11) and the heat flow channel (3). A through hole is provided at the center of the flow control plate (5), and the diameter of the through hole is larger than the flow control hole (9) with the largest diameter on the flow control plate (6).

3. The high-precision flow control injection mold according to claim 1, characterized in that: A drive shaft (8) is provided at the center of the flow control plate (6). The drive shaft (8) extends through the mold body (1) to its top and its two ends are movably connected to the mold body (1) through bearings.

4. The high-precision flow control injection mold according to claim 1, characterized in that: The top of the mold body (1) is provided with multiple motors (7), and the output shaft ends of the motors (7) are fixedly connected to the top of the transmission shafts (8) at corresponding positions.

5. A high-precision flow control injection mold according to claim 1, characterized in that: A hot nozzle (4) is provided at the bottom of the hot flow channel (3), and the hot nozzle (4) is located at the bottom of the mold body (1).

6. The high-precision flow control injection mold according to claim 1, characterized in that: The mold body (1) has a filling port (2) at the top center, and the bottom of the filling port (2) is sealed and connected to multiple hot flow channels (3) around its perimeter.

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