A mold support for a plastic product molding machine

Abstract

The present invention relates to a mold support for an injection molding machine, in particular to a mold support for a plastic product molding machine, including a frame; a female mold mounting part movably mounted on the frame; a male mold mounting part including a flipping member mounted on the frame and at least two male mold positioning members connected to the flipping member; a multi-directional demolding part disposed between the male mold positioning members, including a movable member capable of moving relative to the male mold positioning members and a pushing member capable of pushing the movable member to move; a cooperation part mounted on the frame; by providing the male mold mounting part and the multi-directional demolding part, compared with the turntable type mold support in the prior art, this product can not only cyclically use the first male mold and the second male mold to perform mold closing production with the female mold, but also push the injection-molded products away and concentrate them in the blanking area, thereby improving the automation degree of the multi-station injection molding machine and enhancing the injection production efficiency.

Description

Technical Field

[0001] The present invention relates to a mold support for an injection molding machine, and in particular to a mold support for a plastic product molding machine. Background Art

[0002] An injection molding machine mold support is a device used to support and fix an injection mold and is used in conjunction with an injection molding machine. Its main function is to ensure that the mold remains stable during the injection process and prevent the mold from shifting or being damaged due to vibration or pressure. Common injection molding machines are divided into horizontal injection molding machines and vertical injection molding machines. The horizontal injection molding machine places the mold horizontally, while the vertical injection molding machine sets the mold in the vertical direction.

[0003] In existing multi-station vertical injection molding machines, generally multiple sub-molds are placed on a rotating table, and the rotating table drives the sub-molds to rotate. Multiple sub-molds cycle to correspond to the position of a master mold. However, since the clamping surface of this type of multi-station vertical injection molding machine faces upward, operators need to constantly remove the plastic products produced in the sub-molds, and the degree of automation is affected. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that manual participation is required in the demolding work of multi-station vertical injection molding machines.

[0005] The above technical problem is solved by the following technical solution: The present invention provides a mold support for a plastic product molding machine, which includes,

[0006] A frame;

[0007] A master mold mounting part, which is movably mounted on the frame;

[0008] A sub-mold mounting part, including a flipping member mounted on the frame and at least two sub-mold positioning members connected to the flipping member;

[0009] A multi-directional demolding part, which is arranged between the sub-mold positioning members and includes a movable member capable of moving relative to the sub-mold positioning members and a pushing member capable of pushing the movable member to move;

[0010] A cooperation part, which is mounted on the frame;

[0011] When the sub-mold positioning member faces the master mold mounting part, it is in the forward state. When the sub-mold positioning member faces away from the master mold mounting part, it is in the backward state. The flipping member can rotate to adjust the state of the sub-mold positioning member. When the master mold mounting part moves towards the sub-mold mounting part, the cooperation part can drive the pushing member to push the movable member towards the sub-mold positioning member in the backward state.

[0012] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The cooperation part includes a cross telescopic arm, which connects the female mold mounting part; a lifting base plate, which is connected to the cross telescopic arm; a multi-functional column, which is installed on the lifting base plate; when the female mold mounting part moves towards the male mold mounting part, the cross telescopic arm contracts.

[0013] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The number of the male mold positioning members is two; The movable part includes a sliding body installed between the two male mold positioning members, and ejector pin pushing columns symmetrically arranged on the sliding body.

[0014] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The pushing part includes a rotating shaft, which can rotate relative to the sliding body; a force receiving arm, which is arranged on the rotating shaft; a first force applying arm and a second force applying arm, both of which are arranged on the rotating shaft and are in contact with the sliding body.

[0015] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: A through hole is formed in the male mold positioning member, and the position of the through hole corresponds to the position of the multi-functional column.

[0016] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The lifting base plate is slidably installed on the frame, a support body is installed on the multi-functional column, and the maximum width of the support body is greater than the diameter of the through hole.

[0017] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The frame includes a back frame, and a stabilizing column is installed on the back frame; The lifting base plate is connected with a limiting body, and the limiting body is slidably connected with the stabilizing column.

[0018] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The female mold mounting part includes a female mold positioning member, and a pressing column installed on the female mold positioning member, the pressing column is slidably connected with the cross telescopic arm; The lifting base plate is connected with an inserting column, and the inserting column is slidably connected with the cross telescopic arm.

[0019] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The frame includes a side frame, the flipping part is rotatably installed on the side frame, the flipping part is also connected with a connecting frame, and the male mold positioning member is connected with the flipping part through the connecting frame.

[0020] In a preferred embodiment of the mold support for a plastic product molding machine according to the present invention: The movable member is mounted on the sub - mold positioning member through a limiting member. The limiting member includes an inner column mounted on the sub - mold positioning member. The movable member is slidably mounted on the inner column. An elastic member is sleeved on the inner column, and the elastic member abuts against the movable member.

[0021] The beneficial effects of the present invention are as follows: By providing a sub - mold mounting portion and a multi - direction demolding portion, compared with the turntable - type mold support in the prior art, this product can not only cyclically use the first sub - mold and the second sub - mold to perform mold closing production with the master mold, but also push the injection - molded products away and concentrate them in the blanking area, thereby improving the automation degree of the multi - station injection molding machine and enhancing the injection production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0023] Figure 1 Shows the overall structural schematic diagram of the present invention;

[0024] Figure 2 Shows the front view of the overall structure of the present invention;

[0025] Figure 3 Shows the structural schematic diagram of the sub - mold mounting portion;

[0026] Figure 4 Shows the rear view of the overall structure of the present invention;

[0027] Figure 5 Shows the structural schematic diagram of the cooperation portion;

[0028] Figure 6 Shows the structural schematic diagram of the master - mold mounting portion and the sub - mold mounting portion;

[0029] Figure 7 Shows the structural schematic diagram of the multi - direction demolding portion;

[0030] Figure 8 Shows Figure 7 The enlarged view at position A in;

[0031] Figure 9 Shows the cooperation diagram of the multi - functional column and the sub - mold mounting portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0033] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms may vary according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0034] Referring to Figure 1 , this embodiment provides a mold support for a plastic product molding machine, including a frame 1; the frame 1 is the outer structure of the entire support, used to carry the entire mold support.

[0035] As Figure 1 and Figure 2 , this mold support includes a female mold mounting part 2, which is movably mounted on the frame 1; the function of the female mold mounting part 2 is to mount the female mold, including several guide posts 23. The female mold mounting part 2 also includes a female mold positioning member 21. Several guide posts 23 all penetrate the female mold positioning member 21, and the female mold positioning member 21 is connected to the hydraulic system of the injection molding machine. Specifically, the female mold positioning member 21 is connected to the hydraulic output end in the hydraulic system. Through the hydraulic system of the injection molding machine, the female mold positioning member 21 can be driven to move up and down. During the up and down movement of the female mold positioning member 21, the guide posts 23 play a role in stabilizing and guiding the female mold positioning member 21.

[0036] As Figure 1 and Figure 2 , this mold support includes a male mold mounting part 3, including a flipping member 31 mounted on the frame 1, and at least two male mold positioning members 33 connected to the flipping member 31; the mounting position of the flipping member 31 is below the female mold mounting part 2. The flipping member 31 can rotate, thereby driving the male mold positioning members 33 to rotate. The frame 1 includes side frames 13. The flipping member 31 is rotatably mounted on the side frames 13. The flipping member 31 is also connected with a connecting frame 32. The male mold positioning members 33 are connected to the flipping member 31 through the connecting frame 32. When the flipping member 31 rotates, it can drive the male mold positioning members 33 to rotate through the connecting frame 32. In this embodiment, a motor is used to drive the flipping member 31 to rotate. Of course, other driving structures can also be used to drive the flipping member 31 to rotate. For example, a gear is installed on the flipping member 31, a hydraulic rod is provided to connect a rack, and the rack meshes with the gear. The flipping member 31 is driven to rotate by driving the rack to move through the hydraulic rod.

[0037] As Figure 2 and Figure 3, in this embodiment, the number of sub - mold positioning members 33 installed by the flipping member 31 through the connecting frame 32 is two. Sub - molds are installed on both of the two sub - mold positioning members 33. The surface of the sub - mold positioning member 33 for installing the sub - mold is the installation surface 35. When the two sub - mold positioning members 33 are installed on the connecting frame 32, the installation surfaces 35 are away from each other, and the positions of the sub - mold positioning members 33 correspond to the positions of the master - mold positioning members 21. When the installation surface 35 of the sub - mold positioning member 33 faces the master - mold installation part 2, it is in the forward state, and when the installation surface 35 of the sub - mold positioning member 33 faces away from the master - mold installation part 2, it is in the backward state. The rotation of the flipping member 31 can adjust the state of the sub - mold positioning member 33. The master - mold positioning member 21 can drive the master - mold to move downward, and the sub - mold on the sub - mold positioning member 33 in the forward state can complete mold closing for injection molding work. After injection molding, the flipping member 31 drives the two sub - mold positioning members 33 to rotate 180°. The states of the two sub - mold positioning members 33 are converted. At this time, the master - mold positioning member 21 can drive the master - mold to descend again for injection molding operation, achieving the effect of recycling the multi - station sub - mold.

[0038] As Figure 2 , this mold support includes a multi - direction demolding part 4, which is arranged between the sub - mold positioning members 33 and includes a movable part 42 that can move relative to the sub - mold positioning member 33 and a pushing part 43 that can push the movable part 42 to move; on the sub - molds of the injection molding machine, ejector pin structures are installed, and their function is to eject the molded injection products from the sub - molds. In this embodiment, the movable part 42 moves to push the ejector pin structure of the sub - mold. The movable part 42 is installed between the two sub - mold positioning members 33 and can move in the direction of any sub - mold positioning member 33. During the movement, the movable part 42 can push the ejector pin structure on the sub - mold, and the molded injection products are ejected through the ejector pin structure on the mold. The pushing part 43 is used to push the movable part 42. Through the pushing part 43, the movable part 42 can be pushed to move in the direction of the sub - mold positioning member 33 in the backward state. The movable part 42 pushes the ejector pin structure of the sub - mold on this sub - mold positioning member 33. Because the sub - mold positioning member 33 in the backward state faces the ground, when the ejector pin structure ejects the molded injection products, the injection products are easy to break away from the sub - mold under the action of gravity.

[0039] Refer to Figure 2 and Figure 6 , a cooperation part 5, which is installed on the frame 1; when the master - mold installation part 2 moves towards the sub - mold installation part 3, the cooperation part 5 can drive the pushing part 43 to push the movable part 42 to move in the direction of the sub - mold positioning member 33 in the backward state. Therefore, the two sub - mold positioning members 33 are marked as the first positioning member 33a and the second positioning member 33b. The first sub - mold and the second sub - mold are installed on the first positioning member 33a and the second positioning member 33b respectively. The working process of this support is as follows:

[0040] In the initial state, the first positioning member 33a is in the forward state and the second positioning member 33b is in the backward state. At this time, the injection molding machine hydraulic system drives the female mold mounting portion 2 to move downward and close the mold with the first positioning member 33a. After the injection molding operation is completed, the female mold mounting portion 2 moves upward, causing the female mold to separate from the first sub-mold on the first positioning member 33a. After separation, the first positioning member 33a and the second positioning member 33b are flipped by the flipping member 31. At this time, the second positioning member 33b is in the forward state and the first positioning member 33a is in the backward state. The injection molding machine hydraulic system drives the female mold mounting portion 2 to move downward again, causing the female mold to close the mold with the second sub-mold on the second positioning member 33b and continue the injection molding operation. During this process, the cooperation portion 5 drives the pushing member 43, and the pushing member 43 pushes the movable member 42 to move toward the first positioning member 33a in the backward state, pushing the ejector pin structure of the first sub-mold. The ejector pin structure ejects the injection-molded product from the first sub-mold, and the injection-molded product separates from the first sub-mold under the action of gravity, thus clearing the first sub-mold. In this way, in a cycle, compared with the turntable-type mold support in the prior art, this product can not only cyclically use the first sub-mold and the second sub-mold to close the mold with the female mold for production, but also push the injection-molded product away and concentrate it in the blanking area, thereby improving the automation degree of the multi-station injection molding machine and enhancing the injection production efficiency.

[0041] Reference Figure 2 , as an alternative embodiment, the cooperation portion 5 includes a cross telescopic arm 51, which is connected to the female mold mounting portion 2; a lifting base plate 52, which is connected to the cross telescopic arm 51; a multi-functional column 53, which is installed on the lifting base plate 52; in this embodiment, the cooperation portion 5 can transfer the power of the injection molding machine hydraulic system to the multi-directional demolding portion 4 through the female mold mounting portion 2. The cross telescopic arm 51 is composed of a plurality of X-shaped rod groups, and the plurality of X-shaped rod groups are arranged in a straight line and are rotationally connected by shafts. As shown in the figure, the driving end and the acting end of the cross telescopic arm 51 are shown. The female mold mounting portion 2 is connected to the driving end, and the lifting base plate 52 is connected to the acting end. When the female mold mounting portion 2 moves toward the sub-mold mounting portion 3, the cross telescopic arm 51 contracts. Therefore, when the female mold mounting portion 2 moves downward, it can drive the lifting base plate 52 to move upward, thereby driving the multi-functional column 53 to move upward to drive the pushing member 43.

[0042] Reference Figure 4 and Figure 5 , the frame 1 includes a back frame 11, and a stabilizing column 12 is installed on the back frame 11; the lifting base plate 52 is connected with a limiting body 521, and the limiting body 521 is slidably connected with the stabilizing column 12. The female mold mounting portion 2 includes a pressing column 22 installed on the female mold positioning member 21, and the pressing column 22 is slidably connected with the cross telescopic arm 51; the lifting base plate 52 is connected with an inserting column 522, and the inserting column 522 is slidably connected with the cross telescopic arm 51.

[0043] The rotation axis of one of the X-shaped rods is fixed on the back frame 11, as shown in Figure 5 , a convex shaft 14 is fixed on the back frame 11, and the rotation of the uppermost X-shaped rod is mounted on the convex shaft 14. The purpose of setting the convex shaft 14 is to limit the entire cross telescopic arm 51 to prevent the cross telescopic arm 51 from moving when it contracts.

[0044] In this embodiment, the number of the back frames 11 and the stabilizing columns 12 is two, and the number of the limiting bodies 521, the inserting columns 522, and the pressing columns 22 is also two. A first connecting groove 51a and a second connecting groove 51b are respectively formed at the driving end and the output end of the cross telescopic arm 51. The pressing column 22 is slidably connected with the first connecting groove 51a, and the inserting column 522 is slidably connected with the second connecting groove 51b. Under the limitation of the limiting body 521, the inserting column 522 can only move up and down. Under the limitation of the female mold positioning member 21, the pressing column 22 can also only move up and down. Therefore, when the female mold positioning member 21 moves downward close to the male mold positioning member 33, the cross telescopic arm 51 contracts. At this time, under the action of the second connecting groove 51b, the inserting column 522 drives the lifting substrate 52 to move upward, so that the multifunctional column 53 can move upward, and then can drive the pushing member 43 to perform the demolding work.

[0045] In this embodiment, the power of the hydraulic system is transmitted to the pushing member 43 through the cooperation part 5. First, it can increase the integration of the equipment, and there is no need to continue adding a driving system to drive the pushing member 43. Second, through the transmission of the cooperation part 5, the multifunctional column 53 can automatically adjust its own position according to the position of the female mold positioning member 21.

[0046] In addition, the cross telescopic arm 51 in the cooperation part 5 can also be replaced by a pulley structure. For example, a fixed pulley is installed on the frame 1, a steel cable is used to connect the female mold positioning member 21 and the lifting substrate 52, and the steel cable bypasses the fixed pulley. When the female mold positioning member 21 moves downward, the steel cable moves upward to pull the lifting substrate 52 upward. When the female mold positioning member 21 moves upward, the lifting substrate 52 moves downward under the action of gravity.

[0047] Please refer to Figure 7 and Figure 8 , as an alternative embodiment, the movable member 42 includes a sliding body 421 installed between two male mold positioning members 33, and thimble pushing columns 422 symmetrically arranged on the sliding body 421. Holes for the thimble pushing columns 422 to pass through are installed on both male mold positioning members 33. When the sliding body 421 is pushed by the pushing member 43, the thimble pushing columns 422 can contact the thimble structure of the male mold installed on the male mold positioning member 33 through the holes, and push the thimble structure to eject the plastic product completed by injection molding from the inside of the male mold.

[0048] The movable part 42 is installed between two sub - mold positioning parts 33 through the limiting part 41. The movable part 42 is installed on the sub - mold positioning part 33 through the limiting part 41. The limiting part 41 includes an inner column 411 installed on the sub - mold positioning part 33. The movable part 42 is slidably installed on the inner column 411. An elastic part 412 is sleeved on the inner column 411, and the elastic part 412 abuts against the movable part 42.

[0049] In this embodiment, both ends of the inner column 411 are connected to two sub - mold positioning parts 33 respectively. The number of inner columns 411 is four. Four corresponding holes are provided on the sliding body 421, and the four inner columns 411 pass through the sliding body 421 through the holes. The number of elastic parts 412 installed on each inner column 411 is two. The elastic parts 412 are springs. The two springs are respectively arranged between the two sub - mold positioning parts 33 and the sliding body 421. When the pushing part 43 pushes the sliding body 421 to move, the sliding body 421 will press the spring, causing the spring to deform. When the pressure of the pushing part 43 pressing the sliding body 421 disappears, the spring can restore its deformation and push the sliding body 421 to reset.

[0050] As an alternative embodiment, the pushing part 43 includes a rotating shaft 431 which can rotate relative to the sliding body 421; a force - receiving arm 432 which is arranged on the rotating shaft 431; a first force - applying arm 433 and a second force - applying arm 434, both of which are arranged on the rotating shaft 431 and both abut against the sliding body 421. In this embodiment, the rotating shaft 431 can be rotatably installed on the frame 1 or can be rotatably installed between two sub - mold positioning parts 33. As shown in the figure, the rotating shaft 431 is installed on the connecting frame 32. Two mounting ears 34 are provided on the connecting frame 32. Both ends of the rotating shaft 431 are rotatably installed on the mounting ears 34 respectively. There is a gap between the first force - applying arm 433 and the second force - applying arm 434, and the sliding body 421 is located in the gap. The force - receiving arm 432 has a first force - receiving side 43a and a second force - receiving side 43b. When the first positioning part 33a is in the forward state and the second positioning part 33b is in the backward state, when the multi - functional column 53 rises, it can contact the first force - receiving side 43a and push the rotating shaft 431 to rotate clockwise. At this time, the first force - applying arm 433 can rotate clockwise to press the sliding body 421 to move towards the second positioning part 33b. After flipping, when the multi - functional column 53 rises, it can contact the second force - receiving side 43b. At this time, the second force - applying arm 434 rotates to press the sliding body 421 to move towards the first positioning part 33a, so that when the multi - functional column 53 rises, it can stably drive the sliding body 421 to move towards the sub - mold positioning part 33 in the backward state for demolding operation.

[0051] Please refer to Figure 9, as an alternative embodiment, the sub - mold positioning member 33 is provided with a through - hole 331, and the position of the through - hole 331 corresponds to the position of the multi - function column 53. The through - hole 331 is provided in both sub - mold positioning members 33, and the position of the through - hole 331 corresponds to the position of the multi - function column 53. When the master - mold positioning member 21 moves downward, the multi - function column 53 moves upward and can penetrate through the sub - mold positioning member 33 in the back - to - back state through the through - hole 331. In the injection - molding operation, the multi - function column 53 plays a role in stabilizing the sub - mold positioning member 33 and avoids the problem of horizontal translation of the sub - mold positioning member 33.

[0052] As an alternative embodiment, the lifting substrate 52 is slidably mounted on the frame 1. Specifically, as described above, it is mounted on the back - frame 11 of the frame 1 through the limiting body 521. A support body 531 is mounted on the multi - function column 53, and the maximum width of the support body 531 is greater than the diameter of the through - hole 331. When the master - mold positioning member 21 moves downward, the multi - function column 53 moves upward. When the master - mold and the sub - mold on the sub - mold positioning member 33 in the forward state are closed, the support body 531 on the multi - function column 53 contacts the sub - mold positioning member 33 in the back - to - back state and plays a supporting role for the sub - mold positioning member 33. Therefore, the multi - function column 53 can help share the pressure received by the sub - mold positioning member 33 during mold closing, reduce the pressure received by the flipping member 31 during mold - closing operation, and thus play a protective role for the flipping member 31.

[0053] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A mold support for a plastic product molding machine, characterized in that: including, a frame (1); a master mold mounting part (2) movably mounted on the frame (1); a sub - mold mounting part (3) including a flipping member (31) mounted on the frame (1) and at least two sub - mold positioning members (33) connected to the flipping member (31); a multi - direction demolding part (4) disposed between the sub - mold positioning members (33), including a movable member (42) capable of moving relative to the sub - mold positioning members (33) and a pushing member (43) capable of pushing the movable member (42) to move; a cooperation part (5) mounted on the frame (1), the cooperation part (5) including, a cross - telescopic arm (51) connecting the master mold mounting part (2), the cross - telescopic arm (51) being composed of a plurality of X - shaped rods, and the plurality of X - shaped rods being arranged linearly and rotationally connected by shafts. A convex shaft (14) is fixed on the frame (1), and the rotation of the X - shaped rod at the uppermost position is mounted on the convex shaft (14). The purpose of the convex shaft (14) is to limit the entire cross - telescopic arm (51) to prevent the cross - telescopic arm (51) from moving when contracting; a lifting substrate (52) connected to the cross - telescopic arm (51); a multi - functional column (53) mounted on the lifting substrate (52); when the master mold mounting part (2) moves towards the sub - mold mounting part (3), the cross - telescopic arm (51) contracts; the number of the sub - mold positioning members (33) is two; the movable member (42) includes a sliding body (421) mounted between the two sub - mold positioning members (33) and ejector pin pushing columns (422) symmetrically arranged on the sliding body (421). Holes for the ejector pin pushing columns (422) to pass through are mounted on the sub - mold positioning members (33). When the sliding body (421) is pushed by the pushing member (43), the ejector pin pushing columns (422) can contact the ejector pin structure of the sub - mold mounted on the sub - mold positioning members (33) through the holes and push the ejector pin structure to eject the plastic product completed by injection molding from the inside of the sub - mold; when the sub - mold positioning member (33) faces the master mold mounting part (2), it is in the forward state, and when the sub - mold positioning member (33) faces away from the master mold mounting part (2), it is in the backward state. The flipping member (31) can rotate to adjust the state of the sub - mold positioning member (33). When the master mold mounting part (2) moves towards the sub - mold mounting part (3), the cooperation part (5) can drive the pushing member (43) to push the movable member (42) to move towards the sub - mold positioning member (33) in the backward state; 2. The mold support for a plastic product molding machine according to claim 1, characterized in that: the pushing member (43) includes, a rotating shaft (431) capable of rotating relative to the sliding body (421); a force - receiving arm (432) disposed on the rotating shaft (431); a first force - applying arm (433) and a second force - applying arm (434), both disposed on the rotating shaft (431) and both abutted against the sliding body (421); 3. The die holder for a plastic product molding machine according to claim 1 or 2, characterized in that: a through - hole (331) is formed on the sub - mold positioning member (33), and the position of the through - hole (331) corresponds to the position of the multi - functional column (53).

4. The mold support for a plastic product molding machine according to claim 3, characterized in that: The lifting substrate (52) is slidably mounted on the frame (1). A support body (531) is mounted on the multi-functional column (53), and the maximum width of the support body (531) is greater than the diameter of the through hole (331).

5. The mold support for a plastic product molding machine according to claim 4, characterized in that: The frame (1) includes a back frame (11), and a stabilizing column (12) is mounted on the back frame (11); The lifting substrate (52) is connected with a limiting body (521), and the limiting body (521) is slidably connected with the stabilizing column (12).

6. The die holder for a plastic product molding machine according to claim 2 or 5, characterized in that: The female mold mounting part (2) includes a female mold positioning member (21), and a pressing column (22) mounted on the female mold positioning member (21). The pressing column (22) is slidably connected with the cross telescopic arm (51); The lifting substrate (52) is connected with an inserting column (522), and the inserting column (522) is slidably connected with the cross telescopic arm (51).

7. The mold support for a plastic product molding machine according to claim 6, characterized in that: The frame (1) includes a side frame (13). The flipping member (31) is rotatably mounted on the side frame (13), and the flipping member (31) is further connected with a connecting frame (32). The sub-mold positioning member (33) is connected with the flipping member (31) through the connecting frame (32).

8. The mold support for a plastic product molding machine according to claim 7, characterized in that: The movable member (42) is mounted on the sub-mold positioning member (33) through a limiting member (41). The limiting member (41) includes an inner column (411) mounted on the sub-mold positioning member (33). The movable member (42) is slidably mounted on the inner column (411). An elastic member (412) is sleeved on the inner column (411), and the elastic member (412) abuts against the movable member (42).

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