Device for controlling opening and closing of pin-point gate of three-plate mold

Abstract

The invention discloses a device for controlling opening and closing of a three-plate mold pin-point gate, which comprises a template A, a template B and a stripper plate, the template B is provided with a sprue bush assembly penetrating through the stripper plate, the end face of the template A back to the stripper plate is provided with a sprue insert assembly, the template A is provided with a runner group, and the end face of the template A connected with the stripper plate is embedded with a cover plate. The end face, close to the sprue bush assembly, of the cover plate is provided with a sub-runner, the cover plate is provided with a sub-runner hole in a penetrating mode, the sub-runner hole is connected with the sprue insert assembly, and the end face, back to the stripper plate, of the mold plate A is further provided with a sprue switch assembly which at least comprises a sprue switch control panel provided with a switch hole. And the switch hole corresponds to the sub-runner hole and a sprue of the sprue insert assembly. By means of the device, hole sealing can be achieved only by rotating the rotating shaft hole, corresponding to the rotating shaft, of the end face of the template A, operation is convenient, and the device is not affected by operation space.

Description

Technical Field

[0001] The invention relates to the technical field of injection mold design and manufacturing, and in particular to a device for controlling a gate switch of a three-plate mold. Background Art

[0002] In the process of injection molding, the control of the point gate switch is an important link. The traditional point gate switch structure is generally set to no gate or closed runner. Of course, it can also be set as follows Figure 1 The conventional point gate switch structure shown is rotated with a hexagonal wrench when in use.

[0003] In the process of implementing the prior art, the inventor discovered that:

[0004] When the product is abnormal and the corresponding cavity needs to be sealed, the gate that needs to be sealed is usually blocked by a section of the cold runner of the previous product, or the gate switch is turned with a hexagonal wrench to achieve sealing. Both of these sealing methods are time-consuming and labor-intensive, and have limited operating space.

[0005] Therefore, it is necessary to provide a technical solution that is easy to operate and not affected by the operating space to solve the problem that the hole sealing method in the prior art is time-consuming, labor-intensive and inconvenient to operate. Summary of the invention

[0006] The main technical problem solved by the present invention is to solve the problem that the hole sealing method in the prior art is time-consuming, labor-intensive and inconvenient to operate.

[0007] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0008] Provided is a device for controlling a gate switch of a three-plate mold, comprising an A template, a B template and a stripper plate arranged between the A template and the B template, a gate sleeve assembly penetrating the stripper plate is installed on the B template, a gate insert assembly is arranged on the end face of the A template facing away from the stripper plate, a runner group is opened on the A template for connecting the gate sleeve assembly and the gate insert assembly, a cover plate connected to the gate insert assembly is embedded in the end face of the A template connected to the stripper plate, a diverter channel is arranged on the end face of the cover plate close to the gate sleeve assembly, a diverter channel hole is penetrated through the cover plate and connected to the diverter channel and the gate insert assembly, a gate switch assembly is also arranged on the end face of the A template facing away from the stripper plate, the gate switch assembly at least comprises a gate switch control board provided with a switch hole arranged between the diverter channel hole and the gate insert assembly, the switch hole corresponds to the gate of the diverter channel hole and the gate insert assembly, and is used to control the displacement of the switch hole of the gate switch control board through the gate switch assembly to realize the opening of the gate.

[0009] In a preferred embodiment of the present invention, the gate switch assembly comprises: a rotating shaft passing through the A template and connecting with the cover plate; a first rocker plate and a second rocker plate sleeved on the rotating shaft; a gate switch control board located between the first rocker plate and the second rocker plate and connected with the first rocker plate and the second rocker plate pins; a square through hole is provided at the position where the gate switch control board is connected with the first rocker plate and the second rocker plate pins, and a square force transmission slider is provided in the square through hole and connected with the pins of the first rocker plate and the second rocker plate on both sides; wherein a rotation hole is provided on the end face of the rotating shaft away from the cover plate.

[0010] In a preferred embodiment of the present invention, the cover plate is provided with at least one motion groove for horizontal linear movement of the gate switch control plate near the end surface of the A template.

[0011] In a preferred embodiment of the present invention, a switch indicator needle that rotates with the rotating shaft is also connected to the outer wall of the rotating shaft away from the cover plate, and a cavity for rotating the switch indicator needle is opened on the end face of the A template corresponding to the position of the switch indicator needle, and both ends of the cavity are marked with "open" signs or "closed" signs.

[0012] In a preferred embodiment of the present invention, the gate switch assembly also includes a ball-end screw connected to the outer side wall of the second rocker piece, and the outer side wall of the second rocker piece is provided with a plurality of notches, so that when the second rocker piece rotates with the rotating shaft, the ball-end screw is clamped from one of the plurality of notches to another of the plurality of notches; a headless screw is also provided at the other end of the ball-end screw; and a receiving hole for accommodating the ball-end screw and the headless screw is opened on the side wall of the cover plate.

[0013] In a preferred embodiment of the present invention, pulling needles penetrating the stripper plate and located in the cover plate runner are further provided on both sides of the gate sleeve assembly.

[0014] The beneficial effect of the present invention is that, through the device for controlling the gate switch of the three-plate mold provided by the present application, when the cavity at the corresponding position needs to be closed, it is only necessary to rotate the shaft hole corresponding to the shaft on the end face of the A template to realize the movement of the switch hole of the gate switch control panel, thereby realizing the misalignment of the switch hole, the runner hole, and the gate of the gate insert assembly to seal the cavity. Moreover, the shaft can be rotated according to the "open" mark or "close" mark marked on the A template, and then the switch indicator needle points to the "open" mark or "close" mark. In addition, when the shaft rotates, the ball screw is clamped from one of the several notches on the outer wall of the second rocker piece to one of the other several notches, and the user will also feel it when rotating the shaft. Obviously, the device provided by the present application only needs to rotate the shaft hole corresponding to the shaft on the end face of the A template to achieve the cavity sealing, which is easy to operate and not affected by the operating space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of a preferred embodiment of a midpoint gate switch structure in the prior art;

[0016] Figure 2 It is a structural schematic diagram of a preferred embodiment of a device for controlling a three-plate mold point gate switch provided by the present invention;

[0017] Figure 3 It is a structural schematic diagram of another preferred embodiment of the device for controlling the gate switch of a three-plate mold provided by the present invention;

[0018] Figure 4 is based on Figure 3 A cross-sectional structural diagram of a preferred embodiment of a device for controlling a three-plate mold point gate switch provided by AA;

[0019] Figure 5 is based on Figure 3 A cross-sectional structural diagram of a preferred embodiment of a device for controlling a three-plate mold point gate switch provided by BB;

[0020] Figure 6 It is a structural schematic diagram of a preferred embodiment of the cover plate provided by the present invention;

[0021] Figure 7 It is a structural schematic diagram of a preferred embodiment of a gate switch assembly provided by the present invention;

[0022] The markings of the components in the accompanying drawings are as follows:

[0023] A device for controlling a gate switch of a three-plate mold point-100;

[0024] A template-1; gate insert assembly-11; gate insert-111; runner assembly-12; cavity-13; gate switch assembly-14; rotating shaft-141; rotating hole-1411; first rocker piece-142; second rocker piece-143; gate switch control board-144; switch hole-1441; latch-145; square force transmission slider-146; switch indicator needle-147; ball screw-148; notch-1481; headless screw-149; cover plate-15; runner-151; runner hole-152; receiving hole-153;

[0025] B template-2; gate sleeve assembly-21; puller needle-22;

[0026] Stripper plate-3;

[0027] Existing point gate switch structure -200. DETAILED DESCRIPTION

[0028] 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 definite definition of the protection scope of the present invention.

[0029] It should be well known to those skilled in the art that the prior art is gateless, closed runner or Figure 1 The existing point gate switch structure 200 is shown in . When it is necessary to seal the hole, a section of the cold runner of the previous product is used to block the gate that needs to be sealed, or a hexagonal wrench is used to turn the point gate switch structure to close the runner to achieve it. It should be pointed out that in this process, the hole sealing requires mold opening, the operating space is limited, and the process is time-consuming and labor-intensive. In addition, after the point gate switch is turned, the injection molded plastic flows into the rotating hole 1411 of the point gate switch, resulting in a thick plastic wall formed at the position of the rotating hole 1411 during demolding, and then it is in a soft and sticky state and cannot be demolded. Based on the above problems, the present application provides a simple device for controlling the point gate switch of a three-plate mold, which can seal the hole without opening the mold.

[0030] like Figures 2 to 3 The present application shows a device 100 for controlling a gate switch of a three-plate mold, comprising an A mold plate 1, a B mold plate 2 and a stripper plate 3 arranged between the A mold plate 1 and the B mold plate 2, a gate sleeve assembly 21 penetrating the stripper plate 3 is installed on the B mold plate 2, a gate insert assembly 11 is arranged on the end face of the A mold plate 1 facing away from the stripper plate 3, a runner group 12 is provided on the A mold plate 1 for connecting the gate sleeve assembly 21 and the gate insert assembly 11, a cover plate 15 connected to the gate insert assembly 11 is embedded in the end face of the A mold plate 1 connected to the stripper plate 3, and a cover plate 15 is arranged on the end face of the cover plate 15 close to the gate sleeve assembly 21 There is a branch channel 151, and the cover plate 15 is penetrated by a branch channel hole 152, which is connected to the branch channel 151 and the gate insert assembly 11. A gate switch assembly 14 is also provided on the end face of the A template 1 facing away from the stripper plate 3. The gate switch assembly 14 at least includes a gate switch control board 144 with a switch hole 1441 arranged between the branch channel hole 152 and the gate insert assembly 11. The switch hole 1441 corresponds to the branch channel hole 152 and the gate of the gate insert assembly 11, and is used for controlling the displacement of the switch hole 1441 of the gate switch control board 144 through the gate switch assembly 14 to realize the opening of the gate.

[0031] Specifically, for those skilled in the technical field, the three-plate mold includes an A template 1, a B template 2 and a stripper plate 3 disposed between the A template 1 and the B template 2, a gate sleeve assembly 21 penetrating the stripper plate 3 is installed on the B template 2, a gate insert assembly 11 is provided on the end face of the A template 1 facing away from the stripper plate 3, and a runner group 12 is provided on the A template 1 for connecting the gate sleeve assembly 21 and the gate insert assembly 11, which is the prior art. The A template 1 is a movable template, and the B template 2 is a fixed template. On this basis, the present application provides a preferred embodiment, in which the gate insert assembly 11 is provided to consist of two gate inserts 111, corresponding to the two sides of the position of the gate sleeve assembly 21 of the B template 2. The runner group 12 is used to flow to the two gate inserts 111 respectively through the runner.

[0032] On the basis of the above, the cover plate 15 is provided with a runner 151 near the end surface of the gate sleeve assembly 21, and the runner 151 and the gate insert 111 are connected through the runner hole 152 provided on the cover plate 15. It can also be understood that the runner 151 and the runner hole on the cover plate 15 can be understood as the runner in the runner group 12 opened on the A template 1.

[0033] Furthermore, the gate switch assembly 14 includes: a rotating shaft 141 that passes through the A template 1 and connects with the cover plate 15; a first rocker piece 142 and a second rocker piece 143 that are sleeved on the rotating shaft 141; a gate switch control board 144 that is located between the first rocker piece 142 and the second rocker piece 143 and connected with the pins 145 of the first rocker piece 142 and the second rocker piece 143; a square through hole is provided at the position where the gate switch control board 144 is connected with the pins 145 of the first rocker piece 142 and the second rocker piece 143, and a square force transmission slider 146 is provided in the square through hole and connected with the pins 145 of the first rocker piece 142 and the second rocker piece 143 on both sides; wherein a rotating hole 1411 is provided on the end face of the rotating shaft 141 away from the cover plate 15.

[0034] Specifically, the gate switch assembly 14 is mainly used to control the opening and closing of the gate. In the gate switch assembly 14 provided in the present application, the rotating shaft 141 is used to drive the first rocker piece 142 and the second rocker piece 143 to rotate. The rotation of the first rocker piece 142 and the second rocker piece 143 is used to rotate the latch 145 connected to the gate switch control board 144, and then the force transmission slider connected to the latch 145 rotates accordingly. The gate switch control board 144 is pushed by the force transmission slider to reciprocate along the horizontal straight moving groove. It should be pointed out that in a preferred embodiment provided in the present application, the volume of the force transmission slider is much smaller than the square through hole. When the force transmission slider rotates, the gate switch control board 144 is only subjected to the force of the force transmission slider moving in the direction of the moving groove.

[0035] It can be understood that the switch hole 1441 of the gate switch control board 144 is arranged between the diverter hole 152 and the gate insert assembly 11. When the gate switch control board 144 is forced to move back and forth in a straight line in the motion groove, the switch hole 1441 corresponds or does not correspond to the diverter hole 152 and the gate of the gate insert 111, thereby realizing the flow or non-flow of the injection molded plastic.

[0036] It should also be noted that the cover plate 15 is also provided with a receiving groove for receiving the first rocker piece 142 and the second rocker piece 143 on the end surface close to the A template 1 .

[0037] Furthermore, a switch indicator needle 147 that rotates with the rotating shaft 141 is connected to the outer wall of the rotating shaft 141 at one end away from the cover plate 15, and a cavity 13 for rotating the switch indicator needle 147 is opened at the end face of the A template 1 corresponding to the position of the switch indicator needle 147, and both ends of the cavity 13 are marked with an "open" mark or a "closed" mark.

[0038] Specifically, in order to make it easier to observe whether the injection molded plastic is flowing or not flowing when the rotating shaft 141 rotates, the end surface of the A template 1 is provided with a cavity 13 for the switch indicator needle 147 to rotate, and both ends of the cavity 13 are marked with "open" or "closed" marks to indicate whether the injection molded plastic is flowing or not flowing.

[0039] Furthermore, the gate switch assembly 14 also includes a ball-end screw 148 connected to the outer wall of the second rocker piece 143. The outer wall of the second rocker piece 143 is provided with a plurality of notches 1481, which is used for the ball-end screw 148 to be clamped from one of the notches 1481 to another of the notches 1481 when the second rocker piece 143 rotates with the rotating shaft 141; a headless screw 149 is also provided at the other end of the ball-end screw 148; and a receiving hole 153 for accommodating the ball-end screw 148 and the headless screw 149 is opened on the side wall of the cover plate 15.

[0040] Specifically, although the rotation of the rotating shaft 141 can indicate the circulation or non-circulation of the injection-molded plastic, it is also necessary to ensure that the angle of rotation is determined. A plurality of notches 1481 are set on the outer side wall of the second rocker. When the rotating shaft 141 rotates, the ball screw 148 is connected to the next notch 1481 to indicate that the angle of rotation of the rotating shaft 141 is just enough to make the injection-molded plastic flow through the switch hole 1441 or not flow. It can be understood that when the ball screw 148 rotates to the next notch 1481, the rotating hole 1411 of the rotating shaft will have a certain induction, thereby determining whether the rotation is in place. In a preferred embodiment provided by the present application, the plurality of notches 1481 can be two, one for the injection-molded plastic to flow through the switch hole 1441, and the other for the injection-molded plastic to not flow through the switch hole 1441. Of course, the plurality of notches 1481 can also be multiple, so as to achieve that the switch hole 1441 is flowing in one notch 1481, and the not flowing when connected to the next notch 1481.

[0041] In addition, a headless screw 149 is provided at the other end of the ball screw 148 to prevent the installation position of the ball screw from changing.

[0042] Furthermore, pulling needles 22 penetrating the stripping plate 3 and located at the branch channel 151 of the cover plate 15 are provided on both sides of the gate sleeve assembly 21 .

[0043] Specifically, the pulling needle 22 may be located at a connection position between the branch channel 151 and the branch channel hole 152 so as to better control the flow of the injection molded plastic.

[0044] Specifically, the following is a practical application scenario of the device for controlling the three-plate mold point gate switch provided by the present application:

[0045] In the initial state, the gate sleeve assembly 21 is installed on the B template 2, two gate inserts 111 are set on the end surface of the A template 1 facing away from the stripper plate 3, and two diverter holes 152 are set on the cover plate 15 to correspond to the gate inserts 111, and the two diverter holes 152 are connected to the diverter 151. Two sets of gate switch assemblies 14 are installed on the A template 1, and the switch holes 1441 of the gate switch control boards 144 of the two sets of gate switch assemblies 14 are respectively set between the diverter holes 152 and the gate inserts 111. The switch indicator needles 147 on the rotating shafts 141 of the two sets of gate switch assemblies 14 correspond to the "open" marks at both ends of the cavity 13.

[0046] When the injection mold production is abnormal and needs to be sealed, use the hexagonal wrench to rotate the rotating hole 1411 of the corresponding position of the rotating shaft 141, and the rotating direction is toward the "off" mark. The first rocker piece 142 and the second rocker piece 143 rotate accordingly, and the pin 145 connected to the gate switch control board 144 also rotates accordingly, and the corresponding square force transmission slider 146 rotates accordingly. The gate switch control board 144 is forced to move linearly in the motion groove. At the same time, the ball screw 148 set on the outer wall of the second rocker piece 143 moves out of the current notch 1481 and turns to the next notch 1481. When it turns to the next notch 1481, it indicates that the switch hole 1441 of the gate switch control board 144 does not correspond to the diverter hole 152 and the gate insert 111. At the same time, the switch indicator needle 147 corresponds to the "off" mark, thereby achieving sealing.

[0047] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, 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 device for controlling a three-plate mold point gate switch, comprising an A mold plate, a B mold plate and a stripper plate arranged between the A mold plate and the B mold plate, a gate sleeve assembly penetrating the stripper plate is installed on the B mold plate, a gate insert assembly is arranged on the end surface of the A mold plate facing away from the stripper plate, and a runner group is opened on the A mold plate for connecting the gate sleeve assembly and the gate insert assembly, characterized in that: A cover plate connected to the gate insert assembly is embedded in the end face where the A template is connected to the stripper plate. The cover plate is penetrated by a runner hole connected to the runner and the gate insert assembly. A gate switch assembly is also provided on the end face of the A template facing away from the stripper plate, which is used to control the displacement of the switch hole of the gate switch control board through the gate switch assembly to open the gate.

2. The device according to claim 1, characterized in that The gate switch assembly at least includes a gate switch control board with a switch hole arranged between the branch channel hole and the gate insert assembly, and the switch hole corresponds to the gate of the branch channel hole and the gate insert assembly.

3. The device according to claim 1, characterized in that The gate switch assembly further includes: A rotating shaft that passes through the A template and connects the cover plate; A first rocker plate and a second rocker plate sleeved on the rotating shaft; A gate switch control panel located between the first rocker plate and the second rocker plate and connected to the first rocker plate and the second rocker plate latch; A square through hole is provided at the position where the gate switch control board is connected with the first rocker piece and the second rocker piece latch, and a square force transmission slider is provided in the square through hole and connected with the first rocker piece and the second rocker piece latch on both sides; Wherein, a rotation hole is arranged on the end surface of the rotating shaft away from the cover plate.

4. The device according to claim 1, characterized in that The cover plate is provided with at least a motion groove for horizontal linear movement of the gate switch control plate near the end surface of the A template.

5. The device according to claim 3, characterized in that A switch indicator needle that rotates with the rotating shaft is also connected to the outer wall of the rotating shaft away from the cover plate. The end face of the A template is provided with a cavity for rotating the switch indicator needle corresponding to the position of the switch indicator needle, and both ends of the cavity are marked with "open" or "closed" signs.

6. The device according to claim 3, characterized in that The gate switch assembly also includes a ball screw connected to the outer side wall of the second rocker piece, and the outer side wall of the second rocker piece is provided with a plurality of notches, so that when the second rocker piece rotates with the rotating shaft, the ball screw is clamped from one of the plurality of notches to one of the other plurality of notches; The other end of the ball screw is also provided with a headless screw; The side wall of the cover plate is provided with a receiving hole for receiving a ball screw and a headless screw.

7. The device according to claim 1, characterized in that Pulling needles penetrating the stripping plate and located at the position of the cover plate runner are also provided on both sides of the gate sleeve assembly.

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