A high-speed opening and closing structure for mechanically adjusting the core pulling sequence

Abstract

The present invention discloses a high-speed opening and closing structure for mechanically adjusting the core pulling sequence, which belongs to the field of mold technology. The structure comprises a movable mold and a fixed mold, wherein a plurality of mold cores are installed between the movable mold and the fixed mold, and a transmission seat is fixedly installed on the fixed mold, and a first transmission member and a second transmission member are respectively installed on two opposite sides of the transmission seat. The first transmission member is installed on the movable mold, and the second transmission member is installed on the mold core. During the process of opening and closing the mold, the movable mold can transmit the motion to the mold core through the first transmission member and the second transmission member in sequence, thereby performing core pulling, without the need to control the motion of the mold core separately through a servo motor. This solves the problem in the prior art that a servo motor is needed for core pulling, resulting in high equipment cost and energy consumption, and the core pulling sequence is unreliable, which is prone to errors and causes damage to the mold cores due to collision.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a high-speed opening and closing structure for mechanically adjusting a core pulling sequence. Background Art

[0002] In the process of using molds to produce pallets, it is necessary to pull the cores after opening the mold and reset the cores before closing the mold. When pulling the cores of the pallet, generally multiple cores need to be pulled out from different directions. Once the order of pulling the cores is wrong, it is easy to cause collisions between the cores and cause wear. In the existing technology, the timing of the cores is generally controlled by cylinders or servo motors. This method requires the use of multiple driving parts, which will increase the cost and energy consumption of the equipment. In addition, once the circuit logic is wrong, or due to problems such as slow cylinder response, the cores may collide with each other. Therefore, a mechanical structure is needed to more reliably ensure the order of core pulling.

[0003] For example, "CN111703032A" disclosed in Chinese patent documents has a publication number of a plastic pallet mold servo motor driven outer sliding core pulling mechanism, which includes a fixed mold plate and a movable mold plate, a hot runner plate, a fixed mold plate and a fixed mold insert are installed under the fixed mold plate, a mold foot is installed on the movable mold plate, a movable mold plate and a movable mold insert are installed on the mold foot, an outer slider is arranged between the movable mold plate and the fixed mold plate, a forklift hole insert is arranged on the outer slider, and there is a formed pallet with a steel pipe hole in the pallet. The forklift hole insert is connected to the steel pipe hole core rod, and the steel pipe hole core rod cooperates with the steel pipe hole. The outer slider is driven by the outer sliding core pulling mechanism to slide outward. The outer sliding core pulling mechanism includes an outer pulling bracket arranged on the outer wall of the movable template, a servo motor and a rotating screw are arranged side by side on the outer pulling bracket, a driving gear is installed on the output shaft of the servo motor, a passive gear is installed on one end of the rotating screw, the driving gear is meshed with the passive gear, the other end of the rotating screw is connected to the bearing seat, a screw sleeve is provided on the rotating screw, a 7-shaped block is connected to the screw sleeve, and the 7-shaped block is connected to the outer sliding block; the disadvantage of this patent is that its core rod is driven by a servo motor, the cost and energy consumption of the equipment are high, and once the circuit logic is wrong or fails, it will cause collision damage to the mold core, and the reliability is not good. Summary of the Invention

[0004] The present invention is intended to overcome the problem in the prior art that, during the production process of pallets, core pulling needs to be performed by a servo motor, resulting in high equipment cost and energy consumption, and the core pulling sequence is unreliable and prone to errors, resulting in collision and damage between mold cores. A high-speed opening and closing structure for mechanically adjusting the core pulling sequence is provided, which does not require the use of driving parts such as servo motors or cylinders for driving, and can directly control the movement of the mold core through a mechanical structure to ensure that the mold cores do not collide with each other.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a high-speed opening and closing structure for mechanically adjusting the core-pulling sequence, comprising a movable mold and a fixed mold, a plurality of mold cores being installed between the movable mold and the fixed mold, the movement direction of the mold cores being perpendicular to the movement direction of the movable mold, a transmission seat being fixedly installed on the fixed mold, a first transmission groove and a second transmission groove being respectively provided on two opposite side surfaces of the transmission seat, the intersection of the first transmission groove and the second transmission groove being connected through a transmission window, a first transmission member being installed in the first transmission groove, a second transmission member being installed in the second transmission groove, a plurality of first transmission ribs being arranged at intervals on a side facing the second transmission member, a plurality of second transmission ribs being arranged at intervals on a side facing the first transmission member, the first transmission rib and the second transmission rib being inclined relative to a horizontal plane and having the same inclination angle, the first transmission member being installed on the movable mold, and the second transmission member being installed on the mold core.

[0007] In this solution, during the process of opening and closing the mold, the movable mold can transmit the motion to the mold core through the first transmission member and the second transmission member in sequence, thereby performing core pulling. There is no need to control the motion of the mold core separately through a servo motor. On the one hand, it saves the cost and energy consumption of the equipment. On the other hand, since the motion of all mold cores and the movable mold has only one degree of freedom, during the motion process, there will be no collision and damage between the mold cores due to signal failure at a certain point; the transmission between the inclined first transmission rib and the second transmission rib converts the vertical motion of the movable mold into horizontal motion of the mold core.

[0008] Preferably, the movable mold is equipped with an adjustment component for adjusting the position of the first transmission member relative to the movable mold, the adjustment component includes a lifting rod and an adjustment handle for controlling the lifting of the lifting rod, a lifting rod slot is provided in the movable mold, the lifting rod slot is connected to the outer side of the movable mold through the adjustment slot, the lifting rod is provided with a lifting rod connecting seat passing through the adjustment slot, and the first transmission member is fixedly mounted on the lifting rod connecting seat; in the process of pallet production, since the outer dimensions of the pallet have a standard value, and the internal shape of the pallet needs to be customized according to the product loaded in the pallet, therefore, in order to save costs, when the product to be produced is changed, the movable mold and the fixed mold do not need to be replaced, only the mold core is replaced, and when the mold core is replaced, the core pulling order of each mold core during core pulling may also change. In this preferred solution, the height of the lifting rod can be adjusted by the adjustment handle, thereby adjusting the initial height of each first transmission member, thereby changing the order in which each first transmission member contacts the second transmission member, thereby achieving adaptation to different products.

[0009] Preferably, the lifting rod is provided with two lifting rod connecting seats, namely a left lifting rod connecting seat and a right lifting rod connecting seat, and a left second transmission member and a right second transmission member are respectively installed on both sides of the mold core; through the two lifting rod connecting seats, the balance of the lifting rod during the lifting process can be improved, thereby ensuring that the lifting rod connecting seat will not get stuck in the adjustment groove during the mold opening process.

[0010] Preferably, an adjusting gear is installed on the rotating shaft of the adjusting handle, and a driven gear that meshes and rotates with the adjusting gear is installed on one side of the adjusting gear. A lifting seat is provided on the lifting rod, and a first rack surface and a second rack surface are provided in the lifting seat. The first rack surface and the second rack surface are opposite to each other and parallel to each other, the first rack surface is meshed with the adjusting gear, and the second rack surface is meshed with the driven gear; the adjusting gear will drive the driven gear to rotate together during the rotation process, and the driven gear and the adjusting gear will simultaneously transmit the motion to the first rack surface and the second rack surface, thereby driving the lifting seat to rise and fall; adding the driven gear can make the lifting seat have two opposite meshing surfaces, thereby improving the stability of the lifting seat.

[0011] Preferably, a core slide rail is installed on the fixed mold, and a core slider located in the core slide rail is fixedly installed on the lower side of the mold core; the core slide rail and the core slider can limit the mold core when it moves, thereby improving the straightness of its movement, and making it less likely to get stuck during high-speed movement.

[0012] Preferably, the mold core slide rail is provided with a T-slot with a T-shaped cross-section; the T-slot can simultaneously position the mold core slider vertically and horizontally, thereby further improving the reliability of the equipment during high-speed movement.

[0013] Preferably, the first transmission member includes a transmission section and an invalid section, the first transmission rib is arranged on the transmission section, and the second transmission member is stationary when the invalid section passes through the transmission window; this structure enables that during the mold closing process, after a mold core is in place, the mold core in place will not continue to move because the invalid section moves to the transmission window, while other mold cores can continue to move.

[0014] Therefore, the present invention has the following beneficial effects: (1) it does not require the use of a servo motor or a cylinder or other driving parts for driving, thus saving equipment costs and energy consumption; (2) the movement of the mold core can be directly controlled by the mechanical structure, and it is ensured that the mold cores do not collide with each other; (3) it is not easy to get stuck during high-speed movement, and the reliability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0016] Figure 2It is a front view schematic diagram of the first embodiment of the present invention.

[0017] Figure 3 It is a top view schematic diagram of the first embodiment of the present invention with the movable mold hidden.

[0018] Figure 4 It is a structural schematic diagram of the transmission base of the first embodiment of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the transmission base in another direction according to the first embodiment of the present invention.

[0020] Figure 6 It is a main view schematic diagram of the second embodiment of the present invention.

[0021] Figure 7 This is a front view of the transmission structure of the first transmission member and the second transmission member in embodiment 2 of the present invention.

[0022] Figure 8 This is a rear view of the transmission structure of the first transmission member and the second transmission member in embodiment 2 of the present invention.

[0023] In the figure: 1, movable mold 2, fixed mold 3, front mold core 4, rear mold core 5, left mold core 6, right mold core 7, transmission seat 8, first transmission groove 9, second transmission groove 10, transmission window 11, first transmission member 12, second transmission member 13, first transmission rib 14, second transmission rib 15, mold core slide rail 16, mold core slider 17, T-slot 18, lifting rod 19, adjusting handle 20, adjusting groove 21, lifting rod connecting seat 22, adjusting gear 23, driven gear 24, lifting seat 25, first rack surface 26, second rack surface 27, transmission section 28, invalid section. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1, as Figure 1-5In the illustrated embodiment, a high-speed opening and closing structure for mechanically adjusting the core-pulling sequence includes a moving mold 1 and a fixed mold 2. Four core molds are installed between the moving mold and the fixed mold, namely a front core mold 3, a rear core mold 4, a left core mold 5, and a right core mold 6. The moving direction of the core mold is perpendicular to the moving direction of the moving mold. The moving direction of the moving mold is the vertical direction, the moving directions of the front core mold and the rear core mold are the front-rear direction, and the moving directions of the left core mold and the right core mold are the left-right direction. A transmission seat 7 is fixedly installed on the fixed mold. First transmission grooves 8 and second transmission grooves 9 are respectively provided on two opposite side surfaces of the transmission seat. The length direction of the first transmission groove is vertical, and the length direction of the second transmission groove is horizontal. The intersection of the first transmission groove and the second transmission groove is communicated through a transmission window 10. A first transmission member 11 is installed in the first transmission groove, and a second transmission member 12 is installed in the second transmission groove. A number of first transmission ribs are provided on one side of the first transmission member facing the second transmission member at intervals. A number of second transmission ribs are provided on one side of the second transmission member facing the first transmission member at intervals. The first transmission ribs and the second transmission ribs are inclined relative to the horizontal plane and have the same inclination angle. The first transmission member is fixedly installed on the moving mold, and the second transmission member is fixedly installed on the core mold. Let the groove depth of the first transmission groove be a, the groove depth of the second transmission groove be b, the thickness of the transmission seat be c, and the thickness of both the first transmission rib and the second transmission rib be d. Then 4mm < a + b - c < d. This dimensional relationship enables the first transmission member and the second transmission member to have sufficient contact area, and at the same time, they will not interfere with each other during movement. The shapes of the first transmission ribs and the second transmission ribs are the same, both are strip-shaped with chamfers at both ends, and the inclination angle relative to the horizontal plane is 45 degrees. The distance between two adjacent first transmission ribs is slightly greater than the width of the second transmission rib, and the distance between two adjacent second transmission ribs is slightly greater than the width of the first transmission rib. A core mold slide rail 15 is installed on the fixed mold. A core mold slider 16 located within the core mold slide rail is fixedly installed on the lower side surface of the core mold. A T-shaped groove 17 with a T-shaped cross-section is provided on the core mold slide rail.

[0026] It can be seen that in this embodiment, due to the existence of contact surfaces between the core molds, in order to avoid collision interference between the core molds during the core-pulling process, it is necessary to first perform core-pulling on the left core mold, then on the front core mold and the rear core mold, and finally on the right core mold. The sequence of core mold reset is vice versa. First, the right core mold is reset, then the front core mold and the rear core mold are reset, and finally the left core mold is reset. Figure 3

[0027] ​In this embodiment, the first transmission members connected to the second transmission members on different mold cores have different lengths. During the mold opening process, the first transmission member on the left side of the movable mold first contacts the second transmission member and drives the second transmission member to move to the left, and then drives the left mold core to move to the left. After the left mold core moves out a certain distance, the first transmission members on the front and rear sides of the movable mold respectively drive the front mold core and the rear mold core to move; after the front mold core and the rear mold core move out a certain distance, the first transmission member on the right side of the movable mold drives the right mold core to move, and after the right mold core moves out a certain distance, the core pulling is completed; and during the mold closing process, the first transmission member on the right side of the movable mold first contacts the second transmission member and drives the right mold core to move to the left. After the right mold core is in place, the first transmission members on the front and rear sides of the movable mold respectively drive the front mold core and the rear mold core to move. After the front mold core and the rear mold core are in place, the first transmission member on the left side of the movable mold drives the left mold core to move to the right. The movement order of each mold core can be controlled by the length of the first transmission member and the initial position of the first transmission rib.

[0028] Example 2, as Figure 6-8 As shown, the difference between this embodiment and the first embodiment is that the first transmission member is not fixed on the movable mold, and in this embodiment, the lengths of the first transmission members 11 are the same, and the widths of the first transmission ribs 13 and the second transmission ribs 14 are the same; an adjustment component for adjusting the position of the first transmission member relative to the movable mold is installed on the movable mold of this embodiment, and the adjustment component includes a lifting rod 18 and an adjustment handle 19 for controlling the lifting of the lifting rod. A lifting rod groove is provided in the movable mold, and the lifting rod groove is connected to the outer side of the movable mold through an adjustment groove 20. A lifting rod connecting seat 21 passing through the adjustment groove is provided on the lifting rod, and the first transmission member is fixedly installed on the lifting rod connecting seat; two lifting rod connecting seats are provided on the lifting rod, one for the left lifting rod and the other for the right lifting rod. The rod connecting seat and the right lifting rod connecting seat, the left second transmission member and the right second transmission member are respectively installed on both sides of the mold core; an adjusting gear 22 is installed on the rotating shaft of the adjusting handle, and a driven gear 23 that meshes and rotates with the adjusting gear is installed on one side of the adjusting gear. A locking screw is also installed on the adjusting gear. A lifting seat 24 is provided on the lifting rod, and a first rack surface 25 and a second rack surface 26 are provided in the lifting seat. The first rack surface and the second rack surface are opposite and parallel to each other. The first rack surface is meshed with the adjusting gear, and the second rack surface is meshed with the driven gear; the first transmission member includes a transmission section 27 and an invalid section 28. The first transmission rib is arranged on the transmission section, and the second transmission member is stationary when the invalid section passes through the transmission window.

[0029] When the core pulling sequence needs to be changed due to product changes, the initial position of the first transmission member in each direction of the movable mold can be adjusted by turning the adjustment handle to change the order in which the first transmission members contact the second transmission members. Since the lengths of the first transmission members are the same, the first transmission member that first contacts the second transmission member when the mold is opened must be the last to contact the second transmission member when the mold is closed, thereby achieving the effect of opening first and then closing, or closing first and then opening.

Claims

1. A high-speed opening and closing structure for mechanically adjusting the core pulling sequence, characterized in that: The invention comprises a movable mold and a fixed mold, wherein a plurality of mold cores are installed between the movable mold and the fixed mold, wherein the movement direction of the mold core is perpendicular to the movement direction of the movable mold, and a transmission seat is fixedly installed on the fixed mold, and a first transmission groove and a second transmission groove are respectively provided on two opposite side surfaces of the transmission seat, wherein the intersection of the first transmission groove and the second transmission groove is connected through a transmission window, a first transmission member is installed in the first transmission groove, and a second transmission member is installed in the second transmission groove, wherein the first transmission member is provided with a plurality of first transmission ribs arranged at intervals on a side facing the second transmission member, and the second transmission member is provided with a plurality of second transmission ribs arranged at intervals on a side facing the first transmission member, wherein the first transmission ribs and the second transmission ribs are inclined relative to the horizontal plane and have the same inclination angle, the first transmission member is installed on the movable mold, and the second transmission member is installed on the mold core; an adjustment assembly for adjusting the position of the first transmission member relative to the movable mold is installed on the movable mold, wherein the adjustment assembly comprises a lifting rod, a lifting rod groove is provided in the movable mold, wherein the lifting rod groove is connected to the outer side of the movable mold through the adjustment groove, the lifting rod is provided with a lifting rod connecting seat passing through the adjustment groove, and the first transmission member is fixedly installed on the lifting rod connecting seat.

2. A high-speed opening and closing structure for mechanically adjusting the core-pulling sequence according to claim 1, characterized in that: The adjustment assembly also includes an adjustment handle for controlling the lifting and lowering of the lifting rod.

3. A high-speed opening and closing structure for mechanically adjusting the core-pulling sequence according to claim 2, characterized in that: The lifting rod is provided with two lifting rod connecting seats, namely a left lifting rod connecting seat and a right lifting rod connecting seat, and a left second transmission member and a right second transmission member are respectively installed on both sides of the mold core.

4. A high-speed opening and closing structure for mechanically adjusting the core-pulling sequence according to claim 3, characterized in that: An adjusting gear is installed on the rotating shaft of the adjusting handle, and a driven gear that meshes and rotates with the adjusting gear is installed on one side of the adjusting gear. A lifting seat is provided on the lifting rod, and a first rack surface and a second rack surface are provided in the lifting seat. The first rack surface and the second rack surface are opposite to each other and parallel to each other, the first rack surface is meshed with the adjusting gear, and the second rack surface is meshed with the driven gear.

5. The high-speed opening and closing structure for mechanically adjusting the core-pulling sequence according to claim 1 is characterized in that: A core slide rail is installed on the fixed mold, and a core slider located in the core slide rail is fixedly installed on the lower side of the mold core.

6. A high-speed opening and closing structure for mechanically adjusting the core-pulling sequence according to claim 5, characterized in that: The mold core slide rail is provided with a T-shaped slot with a T-shaped cross section.

7. A high-speed opening and closing structure for mechanically adjusting the core-pulling sequence according to any one of claims 1 to 6, characterized in that: The first transmission member includes a transmission section and an invalid section. The first transmission rib is arranged on the transmission section. When the invalid section passes through the transmission window, the second transmission member is stationary.

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