CN218519020U - Mechanical pressure maintaining device of vulcanization mold - Google Patents

Abstract

The invention relates to the technical field of mold pressure maintaining devices, in particular to a mechanical pressure maintaining device for a vulcanization mold, wherein a mold horizontal adjusting turntable capable of horizontally rotating is arranged on a base, an upper mold turntable capable of horizontally rotating along with the mold horizontal adjusting turntable is connected and arranged right above the mold horizontal adjusting turntable, a mold pressure maintaining assembly is arranged on the upper mold turntable, a plurality of lower mold bodies are arranged on the upper surface of the mold horizontal adjusting turntable along the circumferential direction of the mold horizontal adjusting turntable, and the upper mold bodies with the same number as the lower mold bodies are arranged above the lower mold bodies; each mould passes through mould pressurize subassembly among this technical scheme and accomplishes the compound die pressurize, and the latch segment gomphosis sets up in the ring channel during the mould compound die, locks the mould pressurization pole, and locking spring promotes the latch segment displacement from the horizontal direction for latch segment and ring channel block avoid mould pressurization pole altitude variation, effectually carry out the compound die pressurize to the mould.

Description

Mechanical pressure maintaining device of vulcanization mold

Technical Field

The invention relates to the technical field of mold pressure maintaining devices, in particular to a mechanical pressure maintaining device for a vulcanization mold.

Background

The pressure maintaining equipment is the equipment that needs to use among the vulcanization process, needs vulcanizer to vulcanize rubber during processing because of rubber, need maintain even pressure at this in-process to the rubber molecule forms network structure, makes rubber possess better tensile strength and elasticity.

The existing multi-station vulcanizing mould basically operates in a mode of one mould and one pressurizing cylinder, the cost investment of mould equipment is large, the operation is difficult when the raw materials in the mould are fed and discharged, and when a plurality of cylinders are used for pressure maintaining operation of the mould, the pressure of each mould needs to be adjusted independently, so that the operation of workers is complicated; aiming at the problem exposed in the pressure maintaining process of the existing vulcanizing mould machinery, structural improvement and optimization of the vulcanizing mould machinery pressure maintaining equipment are needed.

Disclosure of Invention

In order to solve the technical problems, the invention provides a mechanical pressure maintaining device for a vulcanization mold, which has the characteristics of quickly closing and opening the mold and stably maintaining the pressure of the mold.

In order to achieve the purpose, the invention provides the following technical scheme: a mechanical pressure maintaining device for a vulcanization mold comprises a base, lower mold bodies and an upper mold body, wherein a mold horizontal adjusting rotary table capable of horizontally rotating is arranged on the base, an upper mold rotary table capable of horizontally rotating along with the mold horizontal adjusting rotary table is connected to the position right above the mold horizontal adjusting rotary table, a mold pressure maintaining assembly is arranged on the upper mold rotary table, a plurality of lower mold bodies are arranged on the upper surface of the mold horizontal adjusting rotary table along the circumferential direction of the mold horizontal adjusting rotary table, the upper mold bodies with the same number as the lower mold bodies are arranged right above the lower mold bodies, each lower mold body and each upper mold body are kept on a vertical line, the upper mold bodies are connected with the bottom ends of the mold pressure maintaining assemblies, the height of the upper mold bodies is adjusted, and mold opening and closing are completed;

the mould pressure maintaining assembly comprises a locking column fixedly arranged on the upper surface of the upper mould rotary table, a mould pressurizing rod vertically penetrates through the locking column, the bottom end of the mould pressurizing rod penetrates through the upper mould rotary table and is connected with the upper mould body, an annular groove is formed in the surface of the outer side of the mould pressurizing rod, retreat grooves are symmetrically formed in the side walls of the locking column, a locking block is embedded in each retreat groove, a pressure assembly for pressurizing the locking block is arranged on the locking column and positioned on the outer side of each retreat groove, and when the mould pressurizing rod sinks to the annular groove and is consistent with the height of the retreat groove, the locking block is pressurized by the pressure assembly, moves towards the mould pressurizing rod and is clamped on the inner side of the annular groove to lock the mould pressurizing rod;

the height of the die pressurizing rod can be adjusted through the die opening assembly, and the lower die body and the upper die body are opened.

According to the preferable technical scheme of the mechanical pressure maintaining device for the vulcanizing mold, a mold closing cylinder is further arranged on one side of the base through a support, the mold closing cylinder is located above a mold pressurizing rod, and an output shaft of the mold closing cylinder can be pushed downwards to pressurize the mold pressurizing rod when in operation, so that an annular groove, a retreating groove and a locking block are located at the same height.

As the preferable technical scheme of the mechanical pressure maintaining device of the vulcanizing mold, the pressure assembly comprises fixing plates symmetrically and fixedly arranged on the side walls of the locking columns, a plurality of locking springs are fixedly arranged on the side walls of the fixing plates facing the retreat grooves, locking blocks are fixedly arranged at one ends of the locking springs far away from the fixing plates, and the locking blocks are pushed to move through the elasticity of the locking springs and are clamped with the annular grooves.

As a preferred technical scheme of the mechanical pressure maintaining device of the vulcanizing mold, a mold opening assembly comprises a support frame arranged on one side of a horizontal adjusting turntable of the mold, a mold opening cylinder is fixedly arranged at the top end of the support frame, an output shaft of the mold opening cylinder penetrates through the support frame and is connected with a synchronizing plate, a base plate is symmetrically and fixedly arranged at the bottom end of the synchronizing plate, a guide slide rail is vertically arranged on the inner side of the base plate, and a separation push plate is arranged on the side wall of the guide slide rail in a sliding manner;

every two latch segments both ends on the locking post all extend to the locking post outside, two the separation push pedal can be followed the inboard of two latch segments and inserted, two the inboard extrusion of latch segment makes two latch segments keep away from each other.

As the preferable technical scheme of the mechanical pressure maintaining device of the vulcanizing mold, an extension rod penetrating through the synchronous plate is vertically and fixedly arranged at the top end of the separation push plate upwards, a pressure spring is sleeved on the outer wall of the extension rod, and two ends of the pressure spring are respectively contacted with the separation push plate and the synchronous plate.

As an optimized technical scheme of the mechanical pressure maintaining device of the vulcanizing mold, the number of the lower mold bodies is consistent with that of the upper mold bodies, and the number of the mold pressurizing rods is consistent with that of the upper mold bodies.

As the preferable technical scheme of the mechanical pressure maintaining device of the vulcanizing mold, a return spring is sleeved on the outer wall of the mold pressurizing rod, and the bottom end of the return spring is in contact with the locking column.

Compared with the prior art, the invention has the following beneficial effects.

1. Each mould passes through mould pressurize subassembly among this technical scheme and accomplishes the compound die pressurize, and the latch segment gomphosis sets up in the ring channel during the mould compound die, locks the mould pressure bar, and locking spring promotes the latch segment displacement from the horizontal direction for latch segment and ring channel block avoid mould pressure bar altitude variation, and the effectual compound die pressurize of carrying out the compound die to the mould.

2. The die sinking and the compound die operation of the mould on each station can be accomplished through only need a compound die cylinder and a die sinking cylinder in this technical scheme use, and the staff can add the lower mould body and the last mould body of required quantity under the condition that does not increase compound die cylinder and die sinking cylinder quantity, and effectual cylinder quantity of saving, reduce cost promotes economic benefits.

3. Promote the latch segment displacement through two separation push pedals among this technical scheme, when synchronous board pressurizes the mould pressure bar, make the latch segment separate from the ring channel, the extension rod that separation push pedal top set up makes the separation push pedal have certain high degree of freedom with pressure spring, the effectual latch segment of being convenient for extrudees the latch segment with the ring channel when not atress, the latch segment of being convenient for is released from the ring channel, the mould of being convenient for accomplishes the die sinking.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of the right-view structure of FIG. 1 according to the present invention.

Fig. 3 is a schematic structural view of a mold horizontal adjustment turntable according to the present invention.

FIG. 4 is a schematic view of a mold pressure maintaining assembly according to the present invention.

Fig. 5 is an enlarged schematic view of a portion a of fig. 4 according to the present invention.

Fig. 6 is a schematic view of a mold opening assembly according to the present invention.

In the figure: 1. a base; 2. a mould horizontal adjusting turntable; 3. a lower die body; 4. an upper die turntable; 5. an upper die body; 6. a mold press bar; 7. a support frame; 8. a die closing cylinder; 9. opening a die cylinder; 10. a locking post; 11. a withdrawal groove; 12. a fixing plate; 13. a locking spring; 14. a locking block; 15. an annular groove; 16. a return spring; 17. a synchronization board; 18. a substrate; 19. a guide slide rail; 20. separating the push plate; 21. an extension rod; 22. a pressure spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1-6, the pressure maintaining device for a vulcanizing mold machinery disclosed by the invention comprises a base 1, lower mold bodies 3 and an upper mold body 5, wherein a mold horizontal adjusting turntable 2 capable of horizontally rotating is arranged on the base 1, an upper mold turntable 4 capable of horizontally rotating along with the mold horizontal adjusting turntable 2 is connected right above the mold horizontal adjusting turntable 2, a mold pressure maintaining assembly is arranged on the upper mold turntable 4, a plurality of lower mold bodies 3 are arranged on the upper surface of the mold horizontal adjusting turntable 2 along the circumferential direction of the mold horizontal adjusting turntable 2, the upper mold bodies 5 with the same number as the lower mold bodies 3 are arranged right above the lower mold bodies 3, each lower mold body 3 and each upper mold body 5 are kept on a vertical line, the upper mold bodies 5 are connected with the bottom ends of the mold pressure maintaining assemblies and adjust the height above the lower mold bodies 3, and the mold opening and mold closing are completed; in this technical scheme the top of upper die body 5 still includes a plurality of dish spring, and when mould pressure bar 6 sinks earlier to last dish spring pressurization on mould body 5, the rethread dish spring is with pressure conduction for last mould body 5.

Mould pressurize subassembly is including the fixed locking post 10 that sets up at last mould carousel 4 upper surface, vertical running through is provided with mould pressure bar 6 in the locking post 10, mould carousel 4 is run through and is connected with last mould body 5 in the bottom of mould pressure bar 6, ring channel 15 has been seted up on the outside surface of mould pressure bar 6, the lateral wall symmetry of locking post 10 is seted up and is moved back groove 11, the gomphosis is provided with latch segment 14 in moving back groove 11, the outside that moves back groove 11 is located and is equipped with the pressure assembly to latch segment 14 pressor on locking post 10, when highly sinking to ring channel 15 and moving back groove 11 highly uniform of mould pressure bar 6, latch segment 14 passes through pressure assembly pressurization and presses the displacement of orientation mould pressure bar 6 and blocks in the inboard locking of ring channel 15 to mould pressure bar 6.

The height of the die pressurizing rod 6 can be adjusted through the die opening assembly, and the lower die body 3 and the upper die body 5 are opened.

Specifically, a die-closing cylinder 8 is further arranged on one side of the base 1 through a support, the die-closing cylinder 8 is located above a die pressurizing rod 6, and an output shaft of the die-closing cylinder 8 can be pushed downwards to pressurize the die pressurizing rod 6 when running, so that the annular groove 15, the retreating groove 11 and the locking block 14 are located at the same height, and the locking spring 13 is used for extruding the locking block 14 through self elasticity.

Specifically, pressure assembly includes that the symmetry is fixed to be set up at the fixed plate 12 of locking post 10 lateral wall, fixed plate 12 moves back the fixed a plurality of locking spring 13 that are provided with of lateral wall of groove 11 towards, locking spring 13 keeps away from the fixed latch segment 14 that is provided with of one end of fixed plate 12, latch segment 14 promotes the displacement and blocks with ring channel 15 through locking spring 13's elasticity, in this embodiment, apply the extrusion force of horizontal direction through locking spring 13 to latch segment 14, mould pressure bar 6 self receives the extrusion force of vertical direction, two extrusion forces keep perpendicularly, effectually avoid latch segment 14 to separate from ring channel 15 accident.

Specifically, the mold opening assembly comprises a support frame 7 arranged on one side of the mold horizontal adjusting turntable 2, a mold opening cylinder 9 is fixedly arranged at the top end of the support frame 7, an output shaft of the mold opening cylinder 9 penetrates through the support frame 7 and is connected with a synchronizing plate 17, a base plate 18 is symmetrically and fixedly arranged at the bottom end of the synchronizing plate 17, a guide slide rail 19 is vertically arranged on the inner side of the base plate 18, and a separation push plate 20 is arranged on the side wall of the guide slide rail 19 in a sliding manner; the guide slide rail 19 can be convenient for the separation push plate 20 to slide in the vertical direction, and then promotes the degree of freedom of the separation push plate 20 in the vertical direction, and the bottom of the separation push plate 20 is retracted to the inner side to form a prismatic table-shaped structure, so that the separation push plate 20 can be inserted from the inner sides of the two locking blocks 14, and the locking blocks 14 are extruded when the separation push plate 20 is highly sunk.

Two latch segments 14 both ends on every locking post 10 all extend to the locking post 10 outside, two separation push plates 20 can be followed the inboard of two latch segments 14 and inserted, it makes two latch segments 14 keep away from each other to the inboard extrusion of two latch segments 14, the top of separation push plate 20 is upwards vertical fixed to be equipped with the extension rod 21 that runs through synchronous board 17, the outer wall cover of extension rod 21 is equipped with pressure spring 22, pressure spring 22's both ends respectively with separation push plate 20 and synchronous board 17 contact, pressure spring 22 makes separation push plate 20 have certain degree of freedom in vertical direction in this embodiment, and then be convenient for accomplish the separation of latch segment 14 and ring channel 15, avoid latch segment 14 and ring channel 15 to be in the locking dead state always.

Specifically, the number of the lower die bodies 3 is the same as that of the upper die bodies 5, the number of the die pressing rods 6 is the same as that of the upper die bodies 5, and each die pressing rod 6 presses each upper die body 5 in this embodiment.

Specifically, the outer wall cover of mould pressure bar 6 is equipped with reset spring 16, reset spring 16's bottom and the contact of locking post 10, reset spring 16 in this embodiment is its effect and resets pressure bar 6 height, after synchronous board 17 pressurizes pressure bar 6, separation push pedal 20 promotes latch segment 14 and keeps away from each other, latch segment 14 and ring channel 15 separation, synchronous board 17 when the operation of die sinking cylinder 9 promotes the height, separation push pedal 20 continues to keep the gesture of sinking under pressure spring 22's pressure, make latch segment 14 still keep away from each other, the height that pressure bar 6 was promoted in the release of reset spring 16 elasticity this moment.

The working principle and the using process of the invention are as follows: in the technical scheme, when the mechanical pressure maintaining device is used, a worker places raw materials to be processed on the lower die body 3 by adopting material conveying equipment, the die horizontal adjusting turntable 2 horizontally rotates on the base 1 through the driving motor when being used, when the lower die body 3 with the raw materials rotates to the position below the die closing cylinder 8, the die closing cylinder 8 operates and pushes the telescopic end of the die closing cylinder 8 downwards, the die closing cylinder 8 pressurizes the die pressurizing rod 6 when operating, so that the height of the die pressurizing rod 6 is reduced, the upper die body 5 is further contacted with the lower die body 3, the top end of the upper die body 5 is provided with the disc spring, the die pressurizing rod 6 firstly extrudes the disc spring and then pressurizes the upper die body 5 through the disc spring, and therefore, larger pressure is applied in the die closing process of the lower die body 3 and the upper die body 5, and larger pressure is applied to the die.

When the height of ring channel 15 and the groove 11 that moves back, latch segment 14 highly uniform, this moment locking spring 13 self elasticity release extrudees latch segment 14, and latch segment 14 is being moved back the inside displacement of groove 11 when being extruded, and latch segment 14 can block in ring channel 15 is inboard for the height of mould pressure (forcing) pole 6 remains stable, and lower mould body 3 finishes with last mould body 5 compound die this moment.

After the die closing is finished, the die closing cylinder 8 operates and contracts, at the moment, the output shaft of the die closing cylinder 8 is separated from the top end of the die pressurizing rod 6, and the horizontal adjusting turntable 2 of the die continuously operates and rotates to enable the lower die body 3 of the next station to be transferred to the lower side of the die closing cylinder 8 for die closing.

The lower die body 3 and the upper die body 5 which finish die assembly perform pressure maintaining through the extrusion of the die pressure rod 6 and the pressure of the disc spring in the transfer process, and the die performs vulcanization operation on raw materials in the pressure maintaining process.

When the vulcanizing time of the raw materials in the lower die body 3 and the upper die body 5 for die assembly is finished, the lower die body 3 and the upper die body 5 for die assembly are transferred to the position under the die opening cylinder 9 under the rotation of the die horizontal adjusting turntable 2, the die opening operation of the die is completed under the die opening cylinder 9, in the die opening operation process of the die, the die opening cylinder 9 operates and pushes the telescopic end of the die to operate, when the bottom end of the synchronizing plate 17 contacts with the top end of the die pressurizing rod 6, the die opening cylinder 9 continues to push downwards, so that the height of the die pressurizing rod 6 is slightly reduced, the height of the annular groove 15 is synchronously reduced, the clamping state of the annular groove 15 and the locking blocks 14 is not in tight clamping, in the height reducing process of the synchronizing plate 17, the height of the synchronizing plate 17 is synchronously driven to reduce the height of the base plate 18, at the same time, the synchronizing plate 17 pressurizes the pressure springs 22, when the pressure springs 22 are compressed, the separation push plates 20 are pressurized, so that the bottom ends of the separation push plates 20 are inserted into the inner sides of the two locking blocks 14, at the same time, and the locking springs 13 are compressed, the inner sides of the two locking blocks 14 are far away from the inner sides of the annular groove 15.

Then the mould opening cylinder 9 makes the flexible end of self rise when moving, and the elasticity release of reset spring 16 self of mould pressure bar 6 outer wall this moment, and then drives the height of mould pressure bar 6 and rise together, and mould pressure bar 6 is carrying ring channel 15 and is rising together highly this moment, and the height that mould body 5 was gone up in the high lifting process of mould pressure bar 6 was driven is together rising, and the mould opening is accomplished with last mould body 5 to lower mould body 3 this moment.

Then the mold opening cylinder 9 continues to drive the synchronous plate 17, the base plate 18 and the separation push plate 20 to rise in height, so that the separation push plate 20 is separated from the locking block 14 until the mold opening assembly does not affect the operation of the mold pressure maintaining assembly.

The lower die body 3 and the upper die body 5 after being opened continue to move to the next station along with the operation of the die horizontal adjustment turntable 2, and a worker can take out a processed workpiece from the lower die body 3 and the upper die body 5 after being opened by adopting material taking equipment.

In the description of this patent, it is to be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "one side," "top," "inner," "front," "center," "two ends," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In this patent, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate, or they may be connected internally or in an interactive relationship with each other, and unless otherwise specifically limited, the specific meaning of the above terms in this patent will be understood by those skilled in the art according to the specific circumstances.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (8)

1. The utility model provides a vulcanization mould utensil machinery pressurizer, includes base (1), lower mould body (3) and goes up mould body (5), its characterized in that: the die horizontal adjusting turntable (2) capable of horizontally rotating is arranged on the base (1), an upper die turntable (4) capable of horizontally rotating along with the die horizontal adjusting turntable (2) is connected to the position right above the die horizontal adjusting turntable (2), a die pressure maintaining assembly is arranged on the upper die turntable (4), a plurality of lower die bodies (3) are arranged on the upper surface of the die horizontal adjusting turntable (2) along the circumferential direction of the die horizontal adjusting turntable (2), upper die bodies (5) the same in number as the lower die bodies (3) are arranged right above the lower die bodies (3), each lower die body (3) and each upper die body (5) are kept on the same vertical line, the upper die bodies (5) are connected with the bottom ends of the die pressure maintaining assemblies and the height of the upper die bodies (3) is adjusted, and die opening and die closing are completed;

the mould pressure maintaining assembly comprises a locking column (10) fixedly arranged on the upper surface of an upper mould rotary table (4), a mould pressurizing rod (6) vertically penetrates through the locking column (10), the bottom end of the mould pressurizing rod (6) penetrates through the upper mould rotary table (4) and is connected with an upper mould body (5), an annular groove (15) is formed in the outer side surface of the mould pressurizing rod (6), retreat grooves (11) are symmetrically formed in the side wall of the locking column (10), locking blocks (14) are embedded in the retreat grooves (11), a pressure assembly for pressurizing the locking blocks (14) is arranged on the locking column (10) on the outer side of the retreat grooves (11), and when the mould pressurizing rod (6) sinks to the height of the annular groove (15) and the retreat grooves (11), the locking blocks (14) are pressurized by the pressure assembly to move towards the mould pressurizing rod (6) and are clamped on the inner side of the annular groove (15) to lock the mould pressurizing rod (6);

the height of the die pressing rod (6) can be adjusted through the die opening assembly, and the lower die body (3) and the upper die body (5) are opened.

2. A mechanical pressurizer for a vulcanization mold as set forth in claim 1, wherein: one side of the base (1) is also provided with a die closing cylinder (8) through a support, the die closing cylinder (8) is positioned above the die pressurizing rod (6), and an output shaft of the die closing cylinder (8) can be pushed downwards to pressurize the die pressurizing rod (6) during operation, so that the annular groove (15), the retreating groove (11) and the locking block (14) are positioned at the same height.

3. A mechanical pressurizer for a vulcanization mold as set forth in claim 1, wherein: pressure assembly includes that the symmetry is fixed to be set up fixed plate (12) at locking post (10) lateral wall, fixed plate (12) are fixed towards the lateral wall of groove (11) of moving back and are provided with a plurality of locking spring (13), the fixed latch segment (14) that is provided with of one end that fixed plate (12) were kept away from in locking spring (13), latch segment (14) promote the displacement and with ring channel (15) block through the elasticity of locking spring (13).

4. A mechanical pressurizer for a vulcanization mold as set forth in claim 1, wherein: mould die sinking subassembly is including setting up support frame (7) in mould horizontal adjustment carousel (2) one side, the fixed die sinking cylinder (9) that is provided with in top of support frame (7), the output shaft of die sinking cylinder (9) runs through support frame (7) and is connected and is provided with synchronizing plate (17), the bottom symmetrical of synchronizing plate (17) is fixed and is equipped with base plate (18), the inboard vertical direction slide rail (19) that is provided with of base plate (18), the lateral wall slip of direction slide rail (19) is provided with separation push pedal (20).

5. A mechanical pressurizer for a vulcanization mold as set forth in claim 4, wherein: every two latch segments (14) both ends on locking post (10) all extend to the locking post (10) outside, two separation push pedal (20) can be followed the inboard of two latch segments (14) and inserted, to two the inboard extrusion of latch segment (14) makes two latch segments (14) keep away from each other.

6. A mechanical pressurizer for a vulcanization mold as set forth in claim 4, wherein: the top of separation push pedal (20) is upwards vertical fixed being equipped with extension rod (21) that run through synchronous board (17), the outer wall cover of extension rod (21) is equipped with compression spring (22), the both ends of compression spring (22) contact with separation push pedal (20) and synchronous board (17) respectively.

7. A mechanical pressurizer for a vulcanization mold as set forth in claim 1, wherein: the lower die body (3) and the upper die body (5) are consistent in quantity, and the die pressurizing rods (6) and the upper die body (5) are consistent in quantity.

8. The mechanical pressure maintaining device of the vulcanization mold of claim 1, characterized in that: the outer wall cover of mould pressure bar (6) is equipped with reset spring (16), the bottom and the locking post (10) contact of reset spring (16).

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