Inverted mold

Abstract

The utility model provides an inverted mold, which comprises a fixed mold assembly, a movable mold assembly and an ejection mechanism, and further comprises a first buckling machine, a second buckling machine, a third buckling machine, a fourth buckling machine and a fifth buckling machine, wherein the first buckling machine is connected to a fixed mold frame and can move up and down along with mold opening and closing actions of the fixed mold frame; the lower end of the second buckling machine is rotationally connected to the ejector pin plate, and the first buckling machine can abut against the second buckling machine to drive the second buckling machine to move and enable the ejection mechanism to move upwards to eject a product during mold opening; and the guide mechanism is at least partially arranged at the upper end of the second buckling machine and can convert the moving part of the second buckling machine into rotation and relieve the abutting state of the first buckling machine and the second buckling machine, so that the fixed mold frame can continue to perform mold opening action. The lower end of the second buckling machine is arranged to rotate, and the guide mechanism is locally arranged at the upper end of the second buckling machine, so that the moving part of the second buckling machine can be converted to rotate, the abutting state of the first buckling machine and the second buckling machine is relieved, the fixed die assembly and the first buckling machine can move upwards according to requirements, and enough space is provided for discharging of a mechanical arm.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of injection mould technical field, especially a kind of upside-down mould. BACKGROUND

[0002] Injection molding is the material of hot melt state is injected into the cavity in mould, after material cooling solidification, open mould ejection after obtaining the processing method of forming product.In the processing of deep cavity product, to shorten the demolding stroke, ensure the quality of appearance surface, upside-down injection mould with injection port and ejection mechanism on the same side is generally used for product processing production, and upside-down mould is usually complex structure, needs additional driving device to eject product.

[0003] Therefore, the Chinese utility model patent with patent No.

[0004] However, the above-mentioned ejection mechanism is limited by the stroke of the ejector plate, and the ejector plate is moved by the mutual abutment of the upper pull rod and the lower pull rod, that is, when the ejector plate moves to the upper limit position, the lower pull rod also moves to the upper limit position, and since the lower end of the upper pull rod abuts against the upper end of the lower pull rod, the continuous movement of the upper pull rod is interfered, that is, the opening action of the fixed die and the movable die is interfered, and the distance between the movable die and the fixed die is limited, which interferes with the action of the robot when relying on the robot to unload the product. Therefore, the existing upside-down mould needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of the prior art, and provides an upside-down mould for conveniently ejecting products, especially suitable for unloading with a robot.

[0006] The utility model solves the technical problem by adopting the following technical scheme: the upside-down mould comprises

[0007] A fixed die assembly comprises a fixed die frame.

[0008] A movable die assembly is arranged below the fixed die assembly and comprises a movable die bottom plate and a movable die frame with a predetermined height between the movable die bottom plate.

[0009] An ejection mechanism comprises an ejector plate and an ejector pin, the ejector plate is movably arranged between the movable die frame and the movable die bottom plate, the lower end of the ejector pin is fixed on the ejector plate, and the upper end of the ejector pin extends into the cavity.

[0010] The first locking mechanism is connected to the fixed mold frame at the upper end and can move up and down following the mold opening and closing actions of the fixed mold frame; characterized in that it further comprises:

[0011] The second locking mechanism is rotatably connected to the ejector plate at the lower end, and the lower end of the first locking mechanism can abut against the upper end of the second locking mechanism to move the second locking mechanism and make the ejector plate and the ejector pins move upward to eject the product when the mold is opened;

[0012] The guide mechanism is at least partially arranged at the upper end of the second locking mechanism, which can convert the moving part of the second locking mechanism into rotation and release the abutting state of the first locking mechanism and the second locking mechanism, so that the fixed mold frame can continue the mold opening action.

[0013] As a structure that can achieve the conversion of the moving part of the second locking mechanism into rotation, preferably, the guide mechanism comprises:

[0014] The first guide is arranged on the movable mold frame;

[0015] The guide hole is arranged at the upper end of the second locking mechanism, and the guide hole is a long hole arranged obliquely from bottom to top, and the oblique direction of the guide hole has a preset angle α with the up-down movement direction of the first locking mechanism, the first guide is arranged in the guide hole, the guide hole has a first position where the first guide is located at the upper part and a second position where the first guide is located at the lower part, with the mold opening action of the fixed mold frame, the first locking mechanism drives the second locking mechanism to move upward, so that the guide hole is converted from the first position to the second position, and at the same time, the second locking mechanism rotates around its own lower end to release the abutting state of the first locking mechanism and the second locking mechanism. When the first locking mechanism drives the second locking mechanism to move, the guide hole is converted from the first position to the second position, and since the guide hole is arranged obliquely from bottom to top and the lower end is rotatably connected to the ejector plate, the position conversion forces the second locking mechanism to rotate around the connection between its own lower end and the ejector plate, thereby achieving that when the first locking mechanism drives the second locking mechanism to move, the second locking mechanism rotates to release the abutting state of the first locking mechanism and the second locking mechanism.

[0016] In order to facilitate the abutting of the first locking mechanism to the second locking mechanism, preferably, the lower end of the first locking mechanism has a laterally protruding first hook, the upper end of the second locking mechanism has a laterally protruding second hook matched with the first hook, and the guide hole is inclined from bottom to top away from the second hook and forms the preset angle α. In use, when the first locking mechanism moves upward, the first hook can abut against the second hook to drive the second locking mechanism to move upward; the inclination of the guide hole from bottom to top away from the second hook makes the second locking mechanism rotate toward the direction away from the first locking mechanism when it moves upward to release the abutting state of the first hook and the second hook. Of course, the hooks can also be arranged on the front and back sides of the locking mechanisms, and the lateral rotation of the second locking mechanism can also release the abutting state of the two.

[0017] In order to avoid the first clamping mechanism from shaking and failing to abut against the second clamping mechanism to drive the movement of the second clamping mechanism during the upward movement of the first clamping mechanism, preferably, the movable die frame is spaced apart from the first clamping mechanism in the moving direction of the first clamping mechanism and is provided with at least two second guide members for guiding the movement of the first clamping mechanism, and the second guide members and the second clamping mechanism are respectively located on the two sides of the first clamping mechanism. In this way, the second guide members can avoid the first clamping mechanism from shaking or deviating in the direction away from the second clamping mechanism during the upward movement of the first clamping mechanism, so as to ensure that the first clamping mechanism can abut against the second clamping mechanism to drive the upward movement of the second clamping mechanism.

[0018] Further, the reset structure for resetting the ejection mechanism and the second clamping mechanism is further included. The reset structure can reset the second clamping mechanism and the ejection mechanism when the mold is closed.

[0019] As a solution of the reset structure, preferably, the reset structure includes a reset rod, the lower end of the reset rod is fixed on the ejector plate, the upper end of the reset rod penetrates through the movable die frame and can partially extend out of the movable die frame in the mold opening state, and when the fixed die frame performs the mold closing action, the fixed die frame acts on the reset rod to drive the downward movement and reset of the ejection mechanism and the second clamping mechanism. The reset rod can follow the upward movement of the ejection mechanism when the ejection mechanism moves upward to eject the product, so that the upper end of the reset rod can partially expose outside the movable die frame, and when the mold is closed, the fixed die frame contacts the reset rod during the downward movement of the fixed die assembly, and the fixed die frame applies a downward pressure on the reset rod to drive the downward movement of the reset rod, the ejection mechanism and the second clamping mechanism, and the second clamping mechanism is reset by reverse rotation during the downward movement.

[0020] Further, the ejection mechanism further includes a third guide member arranged between the movable die bottom plate and the movable die frame, the third guide member is arranged in parallel with the reset rod and is used for guiding the movement of the ejector plate. The third guide member provides a guide for the movement of the ejector plate and provides a preset movement path for the ejector plate.

[0021] In order to improve the quality of the appearance surface of the product, preferably, a nozzle arranged on the movable die assembly is further included, the nozzle penetrates through the movable die bottom plate, the ejector plate and the movable die frame, and the front end of the nozzle is provided with a material head extending into the cavity, and the ejector plate is provided with a through hole for the nozzle to penetrate. The nozzle and the ejection mechanism are arranged on one side of the movable die assembly, and the molten material flows more smoothly from the bottom of the cavity to the top during the filling process, which helps to reduce the problems of weld marks and insufficient filling, and the ejection mechanism is arranged on the same side, so that the ejector marks are left on the non-appearance surface of the product during the ejection, thereby ensuring the flawless appearance surface of the product.

[0022] Compared with the prior art, the advantages of the present application are that: the inverted mold is provided with a guide mechanism on the upper end of the second clamping machine, so that when the first clamping machine moves upward along the fixed mold frame, the moving part of the second clamping machine is forced to rotate, and the abutting state of the first clamping machine and the second clamping machine is released, thereby avoiding the limitation of the abutting state on the stroke of the fixed mold assembly in the prior art, and the fixed mold assembly and the first clamping machine can be moved upward according to requirements or even infinitely upward, thereby providing sufficient space for the mechanical hand to unload. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the inverted mold in the closed mold state in the embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the first clamping machine abutting against the second clamping machine in the embodiment of the present application. Figure 1

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the inverted mold in the open mold state in the embodiment of the present application.

[0026] Figure 4 It is an enlarged view of B in the embodiment of the present application. Figure 3

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the inverted mold in the open mold state in the embodiment of the present application.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the first clamping machine abutting against the second clamping machine in the embodiment of the present application. Figure 5

[0029] It is an enlarged view of D in the embodiment of the present application. Figure 7 DETAILED DESCRIPTION Figure 6 The present application will be further described in detail below with reference to the accompanying drawings.

[0030] As shown in the drawings, it is a preferred embodiment of the present application.

[0031] As shown in the drawings, it is a preferred embodiment of the present application. Figures 1-7 Referring to the drawings,

[0032] Figures 1-2 ​​​​The inverted mold of the embodiment comprises a fixed mold assembly 1, a movable mold assembly 2, an ejection mechanism 4 and a nozzle 9. The fixed mold assembly 1 is arranged on the movable mold side, the movable mold assembly 2 is arranged on the fixed mold side, and the ejection mechanism 4 and the nozzle 9 are arranged on the movable mold assembly 2, so that the pressure marks and injection ports generated by the ejector pins 42 are on the non-appearance surface, thereby ensuring the appearance of the product. Specifically, the fixed mold assembly 1 comprises a fixed mold frame 11, the movable mold assembly 2 is arranged below the fixed mold assembly 1 and comprises a movable mold bottom plate 21 and a movable mold frame 22 with a predetermined height between the movable mold bottom plate 21, the fixed mold frame 11 and the movable mold frame 22 have a closed mold state and a mold opening state, in the closed mold state, the movable mold frame 22 and the fixed mold frame 11 form a cavity 3 for the molded product; the ejection mechanism 4 comprises an ejector pin plate 41 and an ejector pin 42, the ejector pin plate 41 is movably arranged between the movable mold frame 22 and the movable mold bottom plate 21, the lower end of the ejector pin 42 is fixed on the ejector pin plate 41, and the upper end of the ejector pin 42 extends into the cavity 3; the nozzle 9 penetrates through the movable mold bottom plate 21, the ejector pin plate 41 and the movable mold frame 22, and the front end of the nozzle 9 is provided with a material head 91 extending into the cavity 3, and the ejector pin plate 41 has a perforation 43 for the nozzle 9 to penetrate. Due to the special design of the inverted mold, the ejection mechanism 4 needs an additional driving structure to eject the product, therefore, the first buckle 5 is connected to the upper end of the fixed mold frame 11, the second buckle 6 is connected to the lower end of the ejector pin plate 41, the lower end of the first buckle 5 has a laterally protruding first hook 51, the upper end of the second buckle 6 has a laterally protruding second hook 61 matched with the first hook 51, and in the mold opening process, the first hook 51 of the first buckle 5 can abut against the second hook 61 to drive the second buckle 6 and the connected ejection mechanism 4 to move upward and eject the product.

[0033] In order to avoid the situation that the opening distance of the fixed mold assembly 1 is limited by the limited stroke of the ejection mechanism 4 in the prior art, the embodiment creatively provides a guide mechanism 7, which is at least partially arranged at the upper end of the second buckle 6, can convert the moving part of the second buckle 6 into rotation and release the abutting state of the first hook 51 and the second hook 61, avoid the stroke of the ejection mechanism 4 interfering with the continuous upward movement of the fixed mold frame 11, and enable the fixed mold frame 11 to continue the mold opening action. After the first hook 51 is disengaged from the second hook 61, the fixed mold assembly 1 can move upward to any desired position or even unlimited upward movement, thereby leaving enough space between the fixed mold frame 11 and the movable mold frame 22 to cooperate with the unloading action of the mechanical hand.

[0034] Specifically, the guide mechanism 7 of the present embodiment comprises a first guide 71 arranged on the movable die frame 22 and a guide hole 72 arranged on the upper end of the second clamping mechanism 6, the guide hole 72 is a long hole arranged obliquely from bottom to top, the oblique direction of the guide hole 72 has a preset angle a with the up-down moving direction Y of the first clamping mechanism 5, the first guide 71 is arranged in the guide hole 72, the guide hole 72 has a first position where the first guide 71 is located at the upper part and a second position where the first guide 71 is located at the lower part, with the opening action of the fixed die frame 11, the first clamping mechanism 5 drives the second clamping mechanism 6 to move upward, so that the guide hole is switched from the first position to the second position, at the same time, the second clamping mechanism 6 rotates around its own lower end to release the abutting state of the first clamping mechanism and the second clamping mechanism. Specifically, when the first clamping mechanism 5 drives the second clamping mechanism 6 to move, the guide hole 72 is switched from the first position to the second position, because the guide hole 72 is arranged obliquely from bottom to top and the lower end is rotationally connected with the ejector plate 41, the position switching forces the second clamping mechanism 6 to rotate around the connection between the lower end of the second clamping mechanism 6 and the ejector plate 41, so that when the first clamping mechanism 5 drives the second clamping mechanism 6 to move, the second clamping mechanism 6 rotates to release the abutting state of the first clamping mechanism 5 and the second clamping mechanism 6. Because the first hook 51 and the second hook 61 are arranged on the side of each clamping mechanism in the present embodiment, the guide hole 72 is designed to be obliquely arranged from bottom to top and form a preset angle a away from the second hook 61. At the beginning of the opening action, the first clamping mechanism 5 moves along the opening direction of the fixed die frame 11, as shown in FIG. 8, at this time, the first hook 51 has not abutted against the second hook 61, and only the first clamping mechanism 5 moves; as shown in FIG. 9, when the first clamping mechanism 5 moves to the position where the first hook 51 abuts against the second hook 61, the second clamping mechanism 6 and the ejection mechanism 4 connected with the second clamping mechanism 6 move upward together, because of the design of the guide mechanism 7, the second clamping mechanism 6 rotates during the upward movement, as shown in FIG. 10, after the second clamping mechanism 6 rotates to a certain angle, the first hook 51 and the second hook 61 are separated, and the abutting state is released, so that the first clamping mechanism 5 and the fixed die assembly 1 can continue to move upward to perform the opening action. Figure 1 Figures 3-4 Figures 5-7

[0035] In order to facilitate the reset of the ejection mechanism 4, the inverted die further comprises a reset structure for resetting the ejection mechanism 4 and the second clamping mechanism 6. The reset structure of the present embodiment is four reset rods 8 arranged in the movable die frame 22, as shown in FIG. 11, the lower end of each reset rod 8 is fixed on the ejector plate 41, and the upper end can partially extend out of the movable die frame 22 in the opening state, in the closing state, the fixed die frame 11 can press down the reset rod 8 to drive the ejector plate 41 and the ejector pin 42 to move downward, so that the ejection mechanism 4 is reset, during the downward movement, the guide hole 72 returns to the first position from the second position, at the same time, the second clamping mechanism 61 is reversely rotated around its own lower end, so that the second clamping mechanism 6 is reset synchronously. Figure 6

[0036] ​​​​In addition, the movable mold frame 22 is provided with a plurality of second guides 23 for guiding the movement of the first clamping mechanism 5, which are arranged along the movement direction of the first clamping mechanism 5 and are located on both sides of the first clamping mechanism 5 respectively. The arrangement of the second guides 23 can prevent the first clamping mechanism 5 from shaking or deviating from the second clamping mechanism 6 during movement, so that the first clamping mechanism 5 can abut against the second clamping mechanism 6 to drive the second clamping mechanism 6 to move upward. The third guide 44 is arranged between the movable mold frame 22 and the movable mold bottom plate 21 in parallel with the reset rod 8, which provides a preset movement path for the ejector plate 41 and guides the movement of the ejector plate 41.

[0037] In summary, the opening process of the inverted mold of the embodiment is as follows: the first clamping mechanism 5 and the fixed mold frame 11 move upward along with the opening action, and when the first clamping mechanism 5 moves to abut against the second hook 61 of the second clamping mechanism 6, the second clamping mechanism 6 and the ejection mechanism 4 connected thereto are driven to move upward and eject the product. During the ejection process, the guide hole 72 moves from the first position to the second position due to the arrangement of the guide mechanism 7, which drives the second clamping mechanism 61 to rotate around its lower end, so that the contact surface of the first hook 51 and the second hook 61 gradually decreases until they are completely separated. After the first hook 51 and the second hook 61 are separated, the fixed mold frame 11 can continue to perform the opening action until there is enough space for discharging between the fixed mold frame 11 and the movable mold frame 22, especially when a mechanical hand is used for discharging.

[0038] The closing process of the inverted mold of the embodiment is as follows: the first clamping mechanism 5 and the fixed mold frame 11 move downward along with the closing action, and when the fixed mold frame 11 moves downward to contact the reset rod 8, the reset rod 8 is pressed downward and the ejection mechanism 4 is driven to move downward and reset as a whole along with the continuous downward movement of the fixed mold frame 11, and at the same time, the guide hole 72 returns to the first position from the second position, and the second clamping mechanism 61 is driven to rotate reversely around its lower end, so that the second clamping mechanism 6 is reset synchronously.

Claims

1. An inverted mold, comprising a fixed mold assembly (1) comprising a fixed mold frame (11); a movable mold assembly (2) arranged below the fixed mold assembly (1) and comprising a movable mold base plate (21) and a movable mold frame (22) with a preset height between the movable mold base plate (21); the movable mold frame (22) and the fixed mold frame (11) form a cavity (3) for a molded product; the fixed mold frame (11) and the movable mold frame (22) have a closed mold state and an open mold state; an ejection mechanism (4) comprising an ejector plate (41) and an ejector pin (42); the ejector plate (41) is movably arranged between the movable mold frame (22) and the movable mold base plate (21); the lower end of the ejector pin (42) is fixed on the ejector plate (41) and the upper end of the ejector pin (42) extends into the cavity (3); further comprising: a first locking mechanism (5) arranged on the movable mold base plate (21) and having a lower end; a second locking mechanism (6) rotatably connected to the lower end of the ejector plate (41); the lower end of the first locking mechanism (5) can abut against the upper end of the second locking mechanism (6) to drive the second locking mechanism (6) to move and make the ejector plate (41) and the ejector pin (42) move upward to eject the product when the mold is opened; a guide mechanism (7) arranged at least partially on the upper end of the second locking mechanism (6) and capable of converting the moving part of the second locking mechanism (6) into a rotating part and releasing the abutting state of the first locking mechanism (5) and the second locking mechanism (6) to enable the fixed mold frame (11) to continue the opening action of the mold. The guide mechanism (7) comprises: a first guide part (71) arranged on the movable mold frame (22); a guide hole (72) arranged on the upper end of the second locking mechanism (6); the guide hole (72) is a long hole arranged obliquely from bottom to top, the oblique direction of the guide hole (72) has a preset angle a with the up-down moving direction (Y) of the first locking mechanism (5); the first guide part (71) is arranged in the guide hole (72); the guide hole (72) has a first position where the first guide part (71) is located at the upper part and a second position where the first guide part (71) is located at the lower part; with the opening action of the fixed mold frame (11), the first locking mechanism (5) drives the second locking mechanism (6) to move upward to convert the guide hole from the first position to the second position, and the second locking mechanism rotates around its lower end to release the abutting state of the first locking mechanism (5) and the second locking mechanism (6). The lower end of the first locking mechanism (5) has a first hook (51) protruding laterally; the upper end of the second locking mechanism (6) has a second hook (61) protruding laterally and cooperating with the first hook (51); the guide hole (72) is obliquely arranged from bottom to top away from the second hook (61) and forms the preset angle a. The movable mold frame (22) has at least two second guide parts (23) arranged along the moving direction of the first locking mechanism (5) and guiding the movement of the first locking mechanism (5); the second guide parts (23) and the second locking mechanism (6) are respectively arranged on both sides of the first locking mechanism (5). The first clamping machine (5) is connected to the fixed mold frame (11) at the upper end and can move up and down following the mold opening and closing action of the fixed mold frame (11); characterized in that, Further comprising a reset structure for resetting the ejection mechanism (4) and the second locking mechanism (6). ​ ​ 2. The inverse mold according to claim 1, characterized in that: ​ ​ ​ 3. The inverse mold according to claim 2, characterized in that: ​ 4. The inverse mold according to claim 3, characterized in that: ​ 5. The inverted mold of claim 1, wherein: ​ 6. The inverse mold according to claim 5, characterized in that: The reset structure comprises a reset rod (8), the lower end of which is fixed on the ejector plate (41), and the upper end of which passes through the movable die frame (22) and can partially extend out of the movable die frame (22) in the mold opening state; when the fixed die frame (11) performs the mold closing action, the fixed die frame (11) acts on the reset rod (8) to drive the ejector mechanism (4) and the second clamping mechanism (6) to move downward and reset.

7. The inverse mold according to claim 6, characterized in that: The ejector mechanism (4) further comprises a third guide (44) arranged between the movable die bottom plate (21) and the movable die frame (22), which is arranged in parallel with the reset rod (8) and is used to guide the movement of the ejector plate (41).

8. The inverted mold of claim 1, wherein: Further comprising a nozzle (9) arranged in the movable die assembly (2), which passes through the movable die bottom plate (21), the ejector plate (41) and the movable die frame (22), and the front end of which is provided with a material head (91) extending into the cavity (3), and the ejector plate (41) has a perforation (43) for the nozzle (9) to pass through.

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