Runner flow adjusting type injection mold

Abstract

The utility model discloses a runner flow regulation type injection mold, and particularly relates to the technical field of injection molds, the runner flow regulation type injection mold comprises an injection mold seat, an inlet runner is arranged on the outer wall of the middle part of the injection mold seat, a sleeve is fixedly connected with the outer wall of the injection mold seat on the outer side of the inlet runner, and an injection channel is arranged in the sleeve; and a spreader is mounted at the position, close to the outer side of the inlet runner, of the inner side of the end of the injection molding channel, a first electric heating ring is mounted at the position, located outside the injection molding channel, in the sleeve, and a main runner communicating with the end of the inlet runner is arranged in the injection mold base. According to the multi-cavity mold, the time that a plastic melt enters the branch runners is buffered, the impact speed of the plastic melt in the main runner is reduced, the phenomenon that different cavities are filled with plastic unevenly when the multi-cavity mold is used is avoided, and circulation limitation of the plastic melt in the different branch runners can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, more specifically, the utility model relates to flow channel flow regulation type injection mold. BACKGROUND

[0002] Injection mold is an important tool for producing complex-shaped parts in the plastics processing industry. It works by injecting high-pressure molten plastic raw materials into the mold cavity of the mold through the injection molding machine. After cooling and solidification, the shaped plastic products are obtained. In the injection mold, the flow channel system plays a crucial role, as it is responsible for guiding the plastic melt from the injection molding machine nozzle to each cavity of the mold. However, traditional injection molds have some problems in flow channel flow regulation. For example, when using multi-cavity molds, the flow rate in the flow channel is not easy to adjust, which may lead to uneven filling of plastic in different cavities, affecting product quality. In addition, with the diversification and complexity of plastic product demand, higher requirements are placed on the flow regulation capacity of injection molds.

[0003] After searching, the Chinese patent with publication number CN213321378U discloses an injection mold flow regulation structure, which belongs to the field of injection molds and solves the problem of inconvenient adjustment of existing injection flow channels and the inability to adapt to different types of fluids in the prior art.

[0004] However, in actual use, the main flow channel and branch flow channel in the multi-cavity mold are usually connected. The plastic melt will first enter the nearby branch flow channel during the flow process in the main flow channel, while the branch flow channels at other remote positions will not be filled with plastic melt until the main flow channel near the branch flow channel end cavity is filled, thus causing uneven filling of plastic in different cavities. Utility model content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a flow channel flow regulation type injection mold.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: flow channel flow regulation type injection mold, including injection mold base, the middle part outer wall of injection mold base is provided with into flow channel, and the outer wall of injection mold base is fixedly connected with sleeve on the outside of into flow channel, the inside of sleeve is provided with injection channel, the end part inside of injection channel is installed with shunt shuttle close to the outside position of into flow channel, and the inside of sleeve is installed with first electric heating ring at the outside position of injection channel, the inside of injection mold base is provided with main flow channel with into flow channel end part intercommunication, the same side of main flow channel is connected with a plurality of branch flow channels away from the side of into flow channel, and the end part of each branch flow channel is communicated with cavity, and the position of the end of each branch flow channel bottom and main flow channel intercommunication is provided with protruding portion, the inside of injection mold base is provided with arc channel with main flow channel intercommunication close to the both sides position of into flow channel, and the both sides position of injection mold base outer wall is provided with flow circulation adjusting mechanism at into flow channel.

[0007] As a further improvement of the utility model technical scheme, the inside of injection mold base is installed with second electric heating ring close to the side of main flow channel, and the inside of injection mold base is installed with third electric heating ring close to the side of branch flow channel.

[0008] As a further improvement of the utility model technical scheme, the both end parts of arc channel are communicated with main flow channel, and the depth of arc channel and main flow channel is same.

[0009] As a further improvement of the utility model technical scheme, the depth of branch flow channel and main flow channel is same, and the protruding portion is higher than the bottom of branch flow channel and main flow channel at least 2mm.

[0010] As a further improvement of the utility model technical scheme, the flow circulation adjusting mechanism includes the cylinder of fixed installation at the outer wall of injection mold base, the output of cylinder is provided with piston rod, and one end of piston rod is fixedly connected with movable plate in the inside of injection mold base, and the end of movable plate is provided with piston pad for blocking main flow channel.

[0011] As a further improvement of the utility model technical scheme, the outer wall of injection mold base is provided with through -hole for piston rod to pass through, and the outer wall of cylinder and injection mold base is fixedly connected through screw.

[0012] As a further improvement of the utility model technical scheme, the inside of injection mold base is provided with movable cavity along horizontal direction corresponding the outside of movable plate.

[0013] The utility model has the advantages of:

[0014] 1. By setting arc-shaped channels which communicate with the main runner at both sides of the injection mold base near the entrance runner, the depth of the arc-shaped channels is the same as the main runner, which is convenient for the plastic melt to flow into the arc-shaped channels to reduce the flow rate, buffer the time of entering the branch runner, and reduce the impact speed of the plastic melt in the main runner;

[0015] 2. By setting a protruding part at the position where each branch runner communicates with the main runner, the plastic melt entering the main runner will not directly flow into the adjacent branch runner, but will form a certain height in the main runner and then pass through the protruding part to gradually enter the different branch runners, thereby avoiding the uneven filling of plastic in different cavities of the multi-cavity mold during use;

[0016] 3. By setting a flow adjusting mechanism, different injection cavities can be selected for use according to the needs during use, and the operation is simple, only the contraction of the piston rod driven by the cylinder to drive the piston pad to block the inside of the main runner is needed to realize the flow limitation of the plastic melt in different branch runners. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a sectional view of the utility model.

[0018] Figure 2 It is a sectional view of the sleeve in the utility model.

[0019] Figure 3 It is an enlarged view of part A of the utility model Figure 1

[0020] Figure 4 It is a local structure schematic view of the protruding part position in the utility model.

[0021] The figure mark is: 1, injection mold base; 2, entrance runner; 3, sleeve; 4, injection channel; 5, shunt; 6, first electric heating ring; 7, main runner; 8, second electric heating ring; 9, branch runner; 10, cavity; 11, protruding part; 12, arc-shaped channel; 13, third electric heating ring; 14, cylinder; 15, piston rod; 16, movable plate; 17, piston pad; 18, movable cavity; 19, through hole. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.​

[0023] As attached Figures 1-4 The flow rate regulating injection mold shown includes an injection mold base 1. An inlet flow channel 2 is provided on the outer wall of the middle portion of the injection mold base 1. A sleeve 3 is fixedly connected to the outer wall of the injection mold base 1 outside the inlet flow channel 2. An injection channel 4 is provided inside the sleeve 3. A flow divider 5 is installed on the inner side of the end of the injection channel 4 near the outer side of the inlet flow channel 2. A first electric heating coil 6 is installed inside the sleeve 3 at the outer position of the injection channel 4. The injection mold base 1 has a connection to the inlet flow channel... The main channel 7 is connected at both ends. On the same side of the main channel 7, away from the inlet channel 2, there are several branch channels 9. Each branch channel 9 is connected to a cavity 10 at its end. A protrusion 11 is provided at the bottom of the end of each branch channel 9 where it connects with the main channel 7. Arc-shaped channels 12 connected to the main channel 7 are provided on both sides of the injection mold base 1 near the inlet channel 2. Flow adjustment mechanisms are provided on both sides of the outer wall of the injection mold base 1 where it is located in the inlet channel 2.

[0024] As attached Figure 1 As shown, a second electric heating coil 8 is installed inside the injection mold base 1 on the side near the main flow channel 7, and a third electric heating coil 13 is installed inside the injection mold base 1 on the side near the branch flow channel 9, so as to ensure that the plastic melt flowing inside the injection mold base 1 remains in a liquid state.

[0025] As attached Figure 1 As shown, both ends of the arc-shaped channel 12 are connected to the main channel 7, and the arc-shaped channel 12 and the main channel 7 have the same depth. This facilitates the flow of the plastic melt into the arc-shaped channel 12 during the flow process inside the main channel 7, thereby reducing the flow rate, buffering the time to enter the branch channel 9, and reducing the impact speed of the plastic melt inside the main channel 7.

[0026] As attached Figure 1 and attached Figures 3-4 As shown, the branch runner 9 has the same depth as the main runner 7, which facilitates the flow of the molten plastic inside the main runner 7 into the branch runner 9, and then into the cavity 10. The protrusion 11 is at least 2mm higher than the bottom of the branch runner 9 and the main runner 7, so that the molten plastic entering the main runner 7 will not flow directly into the adjacent branch runner 9. Instead, the molten plastic will form a certain height inside the main runner 7 and then submerge the protrusion 11, gradually entering the different branch runners 9. This avoids the phenomenon of uneven plastic filling in different cavities when using a multi-cavity mold.

[0027] As attached Figure 1 and attached Figure 3As shown, the flow regulation mechanism includes a cylinder 14 fixedly installed on the outer wall of the injection mold mold base 1, the output end of the cylinder 14 is provided with a piston rod 15, one end of the piston rod 15 extends to the inside of the injection mold mold base 1 and is fixedly connected with a movable plate 16, the end of the movable plate 16 is provided with a piston pad 17 for blocking the main flow channel 7, the outer wall of the injection mold mold base 1 is provided with a through hole 19 for the piston rod 15 to pass through, the cylinder 14 and the outer wall of the injection mold mold base 1 are fixedly connected by screws, and the inside of the injection mold mold base 1 is provided with a movable cavity 18 in the horizontal direction corresponding to the outside of the movable plate 16, which is convenient for selecting different injection cavities 10 for use as needed during use, and the operation is simple. Only the contraction of the piston rod 15 driven by the cylinder 14 drives the piston pad 17 to form a blockage inside the main flow channel 7, so that the flow of the plastic melt in the different branch flow channels 9 can be realized.

[0028] Working principle: the utility model discloses a flow channel flow regulation type injection mold, and the specific structure is as shown in the description Figures 1-4 As shown, in the technical scheme, the plastic melt is flowed into the main flow channel 7 inside the injection mold mold base 1 through the sleeve 3 of the external injection molding machine, the arc-shaped channel 12 in communication with the main flow channel 7 is arranged at the position close to the two sides of the inlet flow channel 2 in the inside of the injection mold mold base 1, the depth of the arc-shaped channel 12 is same with the main flow channel 7, so that the plastic melt is branched to the inside of the arc-shaped channel 12 during the flow process in the inside of the main flow channel 7, the flow speed is reduced, the time of buffering into the inside of the branch flow channel 9 is reduced, and the impact speed of the plastic melt in the inside of the main flow channel 7 is reduced; the plastic melt is flowed into the inside of the branch flow channel 9 from the inside of the main flow channel 7 and into the inside of the cavity 10 for molding, the protruding part 11 is arranged at the position of the communication between the end of each branch flow channel 9 and the main flow channel 7, so that the plastic melt flowed into the inside of the main flow channel 7 will not directly flow into the inside of the branch flow channel 9 close to it, the plastic melt will form a certain height in the inside of the main flow channel 7 and then pass the protruding part 11 and gradually flow into the inside of the different branch flow channels 9, so that the phenomenon of uneven plastic filling in different cavities of the multi-cavity mold during use is avoided; and the flow regulation mechanism is arranged, different injection cavities 10 are selected for use as needed during use, and the operation is simple. Only the contraction of the piston rod 15 driven by the cylinder 14 drives the piston pad 17 to form a blockage inside the main flow channel 7, so that the flow of the plastic melt in the different branch flow channels 9 can be realized.

[0029] Among them, the utility model discloses an embodiment drawing, only relates to the structure involved in the embodiment, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0030] Finally: the above described is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. Injection mold of the runner flow regulation type comprising an injection mold base (1), characterized in that: The middle outer wall of the injection mold base (1) is provided with an entering flow channel (2), and the outer wall of the injection mold base (1) is fixedly connected with a sleeve (3) outside the entering flow channel (2). The inside of the sleeve (3) is provided with an injection channel (4), and the end of the injection channel (4) is installed with a shunt shuttle (5) close to the outside of the entering flow channel (2). The inside of the sleeve (3) is installed with a first electric heating ring (6) outside the injection channel (4). The inside of the injection mold base (1) is provided with a main flow channel (7) in communication with the end of the entering flow channel (2). The same side of the main flow channel (7) is communicated with a plurality of branch flow channels (9) away from the side where the entering flow channel (2) is located. The end of each branch flow channel (9) is communicated with a cavity (10), and the position where the end of each branch flow channel (9) is communicated with the main flow channel (7) is provided with a protruding part (11). The inside of the injection mold base (1) is provided with an arc-shaped channel (12) in communication with the main flow channel (7) close to the both sides of the entering flow channel (2), and the outer wall of the injection mold base (1) is provided with a flow adjusting mechanism at the both sides of the entering flow channel (2).

2. The flow channel flow regulating type injection mold according to claim 1, characterized by: The inside of the injection mold base (1) is installed with a second electric heating ring (8) close to the side of the main flow channel (7), and the inside of the injection mold base (1) is installed with a third electric heating ring (13) close to the side of the branch flow channel (9).

3. The flow channel flow regulating type injection mold according to claim 1, characterized by: The both ends of the arc-shaped channel (12) are communicated with the main flow channel (7), and the depth of the arc-shaped channel (12) is the same as that of the main flow channel (7).

4. The flow channel flow regulating type injection mold according to claim 1, characterized by: The depth of the branch flow channel (9) is the same as that of the main flow channel (7), and the height of the protruding part (11) is at least 2mm higher than the bottom of the branch flow channel (9) and the main flow channel (7).

5. The flow channel flow regulating type injection mold according to claim 1, characterized by: The flow adjusting mechanism comprises a gas cylinder (14) fixedly installed on the outer wall of the injection mold base (1). The output end of the gas cylinder (14) is provided with a piston rod (15), one end of the piston rod (15) extends into the inside of the injection mold base (1) and is fixedly connected with a movable plate (16). The end of the movable plate (16) is provided with a piston pad (17) for blocking the main flow channel (7).

6. The flow channel flow regulating type injection mold according to claim 5, characterized by: The outer wall of the injection mold base (1) is provided with a through hole (19) for the piston rod (15) to pass through, and the gas cylinder (14) and the outer wall of the injection mold base (1) are fixedly connected by screws.

7. The flow channel flow regulating type injection mold according to claim 5, characterized by: The inside of the injection mold base (1) is provided with a movable cavity (18) corresponding to the outside of the movable plate (16) in the horizontal direction.

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