Material-saving runner switch structure

Abstract

The utility model discloses a material-saving runner switch structure which comprises a runner insert and a driving shaft, a runner of the runner insert penetrates through the end face of the runner insert, a rotating hole is formed in the driving shaft, and a transmission device is arranged between the driving shaft and the runner insert and used for driving the runner insert to rotate through rotation of the rotating hole. And the driving shaft rotates to drive the transmission device and the runner insert connected with the transmission device to rotate. By means of the structure, the problems that in the prior art, due to the fact that a spanner rotating space needs to be arranged at the bottom of a runner, useless plastic needs to be filled in the injection molding process, plastic waste is caused, and due to the fact that the wall thickness of the filled plastic is too large, the final forming cycle time is prolonged are solved; the transmission device and the flowing insert connected with the transmission device are driven to rotate, so that the runner of the flowing insert rotates to change the flowing direction, injection molding plastic flows through the runner or is closed, material waste is reduced, and the forming period of the injection mold is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of plastic injection molding, in particular to a material-saving flow channel switch structure. Background Art

[0002] In the current injection molding process, the runner switch is generally used in multi-cavity injection molds. Figure 1 As shown in the figure, the structure of the current flow channel switch is provided with a flow channel for the injection molding plastic to flow on its upper end surface, and a space for the wrench to rotate, i.e., a rotating hole, is provided at the bottom of the flow channel. Figure 2 As shown, when in use, a wrench is used to rotate the rotating hole to achieve the flow of plastic through the flow switch.

[0003] In the process of implementing the prior art, the inventors found that:

[0004] During normal injection molding production, the space where the runner switch is set to rotate will be filled with plastic, resulting in useless plastic filling the wrench space during each subsequent demolding process, causing material waste and increased production costs.

[0005] Furthermore, because the plastic filling the wrench space creates a thick wall at that location, even after the entire part has cooled sufficiently and is ready for demolding, the hexagonal wrench space on the runner may still be soft and sticky, preventing smooth demolding. This requires a longer cooling time to ensure proper demolding of the plastic in this space, which in turn affects the injection mold's molding cycle.

[0006] Therefore, it is necessary to provide a runner switch technical solution that reduces material waste and improves the molding cycle of the injection mold to solve the problem in the existing technology that the space where the runner switch is set to rotate is filled with useless plastic, causing material waste, and the position requires a long time to ensure demolding, affecting the molding cycle of the injection mold. Utility Model Content

[0007] The main technical problem solved by the utility model is to provide a runner switch technical solution for reducing material waste and improving the molding cycle of the injection mold, so as to solve the problem in the prior art that the space where the wrench of the runner switch is rotated is filled with useless plastic, causing material waste, and the position requires a long time to ensure demolding, which affects the molding cycle of the injection mold.

[0008] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0009] A material-saving flow channel switch structure is provided, comprising a flow channel insert and a driving shaft, wherein the flow channel of the flow channel insert passes through the end face of the flow channel insert, a rotating hole is provided on the driving shaft, and a transmission device is provided between the driving shaft and the flow channel insert, for rotating the rotating hole so that the driving shaft rotates to drive the transmission device and the flow channel insert connected to the transmission device to rotate.

[0010] In a preferred embodiment of the present invention, annular grooves are respectively formed on the flow channel insert and the driving shaft, and sealing rings are provided on the annular grooves.

[0011] In a preferred embodiment of the present invention, the rotating hole is provided on an end surface of one end of the driving shaft; the rotating hole is polygonal.

[0012] In a preferred embodiment of the present invention, the transmission device specifically includes:

[0013] A driving gear mounted on a driving shaft;

[0014] A driven gear mounted on the runner insert that meshes with the driving gear.

[0015] The beneficial effects of the present invention are as follows: the material-saving runner switch structure provided by the present application avoids the problem that a space for a wrench to rotate is provided at the bottom of the runner, which results in the need to fill the runner with useless plastic during the injection molding process, causing waste of plastic, and an increase in the final molding cycle time due to the excessive thickness of the filled plastic wall. Instead, the driving shaft is rotated through the rotating hole, driving the rotation of the transmission device and the flow insert connected to the transmission device, thereby causing the runner of the flow insert to rotate and change the flow direction, thereby realizing the flow or closure of the injection molded plastic through the runner, reducing material waste and improving the molding cycle of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an existing flow channel switch provided by the utility model;

[0017] Figure 2 This is a structural diagram of the existing flow channel switch provided by the utility model, which is turned to realize the switch;

[0018] Figure 3 This is a schematic diagram of the material-saving flow channel switch structure provided by the utility model;

[0019] Figure 4 This is a structural schematic diagram of an exploded view of a material-saving flow channel switch structure provided by the present invention;

[0020] The components in the drawings are marked as follows: existing flow channel switch structure - 200; wrench - 210;

[0021] Material-saving flow channel switch structure-100;

[0022] Runner insert-1; runner-11;

[0023] Driving shaft-2; rotating hole-21;

[0024] Transmission device-3; driving gear-31; driven gear-32;

[0025] Annular groove-4; sealing ring-5. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0027] Please refer to Figure 1 The existing flow channel switch structure 200 has a flow channel for injection molding plastic flow on its upper end surface, and a space for the wrench to rotate, i.e., a rotation hole, is set at the bottom of the flow channel. Figure 2 As shown, when rotation is required, the wrench 210 is inserted into the rotating hole and rotated, so that the flow channel changes its flow direction, thereby realizing the injection molded plastic flowing through the flow channel or closing it.

[0028] Please refer to Figures 3 and 4 , a material-saving flow channel switch structure 100 provided by the present application, which includes a flow channel insert 1 and a driving shaft 2. The flow channel 11 of the flow channel insert 1 runs through the end surface of the flow channel insert 1, that is, the flow channel 11 is provided on the upper end surface of the flow channel insert 1. A rotating hole 21 is provided on the driving shaft 2, and a transmission device 3 is provided between the driving shaft 2 and the flow channel insert 1. It can be understood that when the rotating hole 21 rotates, the driving shaft 2 rotates, the driving shaft 2 drives the transmission device 3 to rotate, and the transmission device 3 drives the flow channel insert 1 to rotate, thereby causing the flow channel 11 on the flow channel insert 1 to rotate. It can be understood that the rotation of the flow channel 11 changes the flow direction, which can realize the flow or closing of the injection molded plastic through the flow channel 11.

[0029] It should be pointed out that, compared with the prior art, the structure provided in the present application sets the rotating hole 21 that drives the flow channel 11 to rotate on a non-flow channel part. This avoids the injection molded plastic from flowing into the rotating hole 21 when passing through the flow channel 11, causing material waste, and reduces the molding time of the injection molded parts.

[0030] Preferably, an annular groove 4 is further formed on the runner insert 1 and the driving shaft 2, and a sealing ring 5 is provided on the annular groove 4. Specifically, installing the sealing ring 5 on the annular groove 4 on the runner insert 1 and the driving shaft 2 helps to increase the friction between the driving shaft 2 and the runner insert 1 in the mounting hole of the mounting mold, so as to better control the rotation angle.

[0031] Preferably, the rotation hole 21 is provided on the end surface of one end of the driving shaft 2; the rotation hole 21 is polygonal. Specifically, the rotation hole 21 is primarily used to achieve the rotation of the driving shaft 2. In a preferred embodiment provided herein, the rotation hole 21 can be a quadrilateral, hexagonal, or other shape, and the driving shaft 2 can be rotated by inserting a corresponding wrench into the rotation hole.

[0032] Preferably, the transmission device 3 specifically includes: a driving gear 31 installed on the driving shaft 2; and a driven gear 32 installed on the flow channel insert 1 and meshing with the driving gear 31. Specifically, the transmission device 3 between the driving shaft 2 and the flow channel insert 1 can be realized by gear transmission, but it can also be realized by transmission methods such as belts and chains. In a preferred embodiment provided in the present application, a gear transmission that can ensure the rotation angle is preferably used as the transmission device 3. Specifically, a driving gear 31 is installed on the driving shaft 2, and a driven gear 32 meshing with the driving gear 31 is installed on the flow channel insert 1, so that when the driving shaft 2 rotates, the driving gear 31 of the driving shaft 2 rotates to drive the driven gear 32 of the flow channel insert 1 to rotate, and then the flow channel insert 1 rotates.

[0033] It should be noted that the driving gear 31 of the driving shaft 2 can be located at any position on the driving shaft 2, and the driven gear 32 on the runner insert 1 corresponds to the driving gear 31. In a preferred embodiment provided in the present application, the driving gear 31 of the driving shaft 2 is preferably located at the other end away from the rotating hole 21 of the driving shaft 2.

[0034] The material-saving runner switch structure 100 provided in this application operates as follows: The driving shaft 2 is rotated by turning the rotation hole 21 with a wrench, causing the driving shaft 2 to rotate. The driving gear 31 mounted on the driving shaft 2 then rotates along with the driving shaft 2. The driven gear 32 on the runner insert 1 meshes with the driving gear 31 and rotates, driving the runner insert 1 to rotate. The rotation of the runner insert 1 causes the runner 11 of the runner insert 1 to change its flow direction, allowing the injection molded plastic to flow or close through the runner 11. Furthermore, an annular groove 4 for mounting a sealing ring 5 is provided on the driving shaft 2 and the runner insert 1. The installation of the sealing ring 5 enhances the friction between the driving shaft 2 and the runner insert 1 and the mounting hole in the mold, facilitating control of the rotation angle of the driving shaft 2 and the runner insert 1 during rotation.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A material-saving flow channel switch structure, characterized in that: It includes a flow channel insert and a driving shaft. The flow channel of the flow channel insert passes through the end face of the flow channel insert. A rotating hole is provided on the driving shaft. A transmission device is provided between the driving shaft and the flow channel insert. The driving shaft is used to rotate the rotating hole so that the transmission device and the flow channel insert connected to the transmission device rotate.

2. The material-saving flow channel switch structure according to claim 1 is characterized in that: Annular grooves are respectively formed on the flow channel insert and the driving shaft, and sealing rings are provided on the annular grooves.

3. The material-saving flow channel switch structure according to claim 1, characterized in that: The rotating hole is arranged on the end surface of one end of the driving shaft, and the rotating hole is polygonal.

4. The material-saving flow channel switch structure according to claim 1, characterized in that: The transmission device specifically includes: A driving gear mounted on a driving shaft; A driven gear mounted on the runner insert that meshes with the driving gear.

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