CN116352988A - Rear die device of direct press - Google Patents

Abstract

The invention discloses a back die device of a direct press, a high-pressure die locking cylinder cover is arranged on the end face of a tail plate, a seal is formed between the high-pressure die locking cylinder cover and the tail plate, one end of a high-pressure die locking cylinder piston is in sliding fit in the tail plate, the other end of the high-pressure die locking cylinder piston is in sliding fit in the high-pressure die locking cylinder cover, a plurality of supporting guide components are axially arranged on the step face of the tail plate, guide holes corresponding to the supporting guide components are formed in the high-pressure die locking cylinder cover, the other end of the supporting guide components is in sliding fit in the guide holes all the time, and a die shifting component capable of axially stretching is also arranged in the high-pressure die locking cylinder piston. The beneficial effects of the invention are as follows: the periodic uneven heavy impact load is effectively transferred and decomposed, the bearing capacity of the first wear-resistant ring and the second wear-resistant ring is reduced, the service lives of the first wear-resistant ring and the second wear-resistant ring are prolonged, the interval time of large maintenance is greatly prolonged, and the direct economic loss caused by large maintenance is avoided.

Description

Rear die device of direct press

Technical Field

The invention relates to an injection molding direct press, in particular to a rear die device of the direct press.

Background

The die locking structure of the hinge type injection molding machine is uneven in stress on the die plate, and the die plate is prone to bending after stress decomposition. Under the conditions of high injection pressure and high mold locking force, the mold plate works in bending deformation for a long time, so that the service life is seriously influenced, and the mold is seriously influenced because the deformation of the mold plate is finally acted on the mold. The low pressure die protection area is very close to the machine hinging force amplification area, resulting in poor reliability of low pressure die protection.

The direct-pressure injection molding machine is different from a hinged injection molding machine, the axial stress of the center of the template is greatly improved, the bending deformation tendency of the template is greatly improved, the stress balance of each point of the mold is ensured, and a uniform and stable product is produced. The direct-pressure machine template has high parallelism and good precision retention, and the precision retention after repeated disassembly and assembly is good. The whole process mode locking force of the direct-pressure machine is adjustable, and an amplifying area of the machine hinging machine force does not exist, so that the low-pressure die is more stable and reliable.

In the bottle embryo industry, the high-speed direct press machine special at present is generally manufactured without stopping the machine for 24 hours, and under the normal condition, the oil leakage phenomenon can occur when the high-pressure mold locking device of the direct press machine is continuously used for two years, so that the high-speed direct press machine needs to stop for one to two times a year for ordinary maintenance, and the oil leakage phenomenon of the high-pressure mold locking device is not effectively solved at present. And the large maintenance is carried out for two years, and in the large maintenance for two years, the wear-resistant ring of the high-pressure mold locking cylinder piston of the traditional high-pressure mold locking cylinder of the direct press needs to be replaced. Because of the specificity of the structural design of the direct press, the abrasion-resistant ring for replacing and supporting the high-pressure mold locking cylinder piston of the high-pressure mold locking cylinder needs to be disassembled, the whole tail plate assembly is lifted to the field ground or the platform to be disassembled further, and the abrasion-resistant ring cannot be replaced on the equipment rack. Because of the huge number of disassembled parts, the reinstallation also needs to consume a great deal of time and labor, and seriously affects production. The production stopping time of about one week or more can cause visual economic loss for enterprises, so the oil leakage phenomenon of the high-pressure die locking device becomes a technical problem to be solved urgently for the direct press.

The inventor researches the disassembled wear-resistant ring, and finds that the main reason for causing the oil leakage of the high-pressure mold locking device is that the wear-resistant ring is seriously worn, so that the sealing performance of an oil cavity is reduced, then the oil leakage still occurs through replacing the high-performance wear-resistant ring, the oil leakage time is delayed for a few months later, the oil leakage phenomenon of the direct press is still unresolved, the inventor researches the reason why the direct press can cause the damage of the wear-resistant ring, and finds that the wear-resistant ring is not accepted uniformly in the use process, so that the stress concentration of a local area is caused, and the main reason is that: the high-pressure mold locking cylinder piston and the high-pressure mold locking cylinder cover are high in weight, in the assembling process, the mold locking device is affected by the assembling process and the assembling capability, and in the using process, the bearing force of the wear-resisting ring is unevenly distributed, so that the high-pressure mold locking device is locally concentrated in stress in the long-term use process, and damage is caused, and oil leakage occurs.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rear die device of a direct press.

The aim of the invention is achieved by the following technical scheme: the utility model provides a back mould device of straight press, including the tailboard, high pressure mode locking cylinder cap, high pressure mode locking cylinder piston, high pressure mode locking cylinder cap is installed on the terminal surface of tailboard, and seal between high pressure mode locking cylinder cap and the tailboard, high pressure mode locking cylinder piston's one end sliding fit is in the tailboard, high pressure mode locking cylinder piston's the other end sliding fit is in high pressure mode locking cylinder cap, a plurality of support direction subassemblies are installed to axial on the step face of tailboard, the guiding hole that corresponds with support direction subassembly is offered on the high pressure mode locking cylinder cap, support direction subassembly's the other end sliding fit all the time in the guiding hole, still install the die shifting subassembly that can axial stretch out and draw back in the high pressure mode locking cylinder piston.

Optionally, the support guide assembly includes the guide bar, and the one end of guide bar is installed on the step face of tailboard, and the other end of guide bar is located the guiding hole, installs the guide ring on the guide bar, guide ring and guiding hole sliding fit, installs the third wear-resisting ring on the guide bar that is located guide ring axial both sides, and the third wear-resisting ring all is located the guiding hole, and the guide bar that is located the guiding hole has the clearance between circumference direction and guiding hole.

Optionally, a blind hole is formed in the step surface of the tail plate, a locking screw hole is formed in the bottom of the blind hole, a step through hole is formed in the guide rod in the axial direction, a locking screw is mounted in the step through hole in a threaded fit mode, one end of the guide rod is matched in the blind hole, and the locking screw is locked with the locking screw hole.

Optionally, the guide bar inserted into the blind hole is the locating end of guide bar, a plurality of oil grooves are offered on the excircle of locating end, when high-pressure mode locking cylinder piston is ejecting, oil groove and first oil pocket intercommunication have still been offered the oil through hole on the guide bar, the oil inlet has been offered on the oil groove, oil inlet and oil through hole intercommunication, the counter bore has been offered on the terminal surface of locating end, counter bore and step through hole intercommunication, the one end and the counter bore intercommunication of oil through hole, the other end and the guiding hole intercommunication of oil through hole, and guiding hole, oil through hole, counter bore and step through hole form the circulation oil circuit.

Optionally, the guiding hole is a through hole, and the other end of the guiding hole far away from the supporting guiding component is provided with a blocking cover component.

Optionally, the blanking cover subassembly includes the blanking cover, has offered the through-hole on the blanking cover, and the through-hole passes through the end cap shutoff, has offered annular seal groove on the blanking cover, installs the sealing washer in the seal groove, and the sealing washer is extruded on the inside wall of guiding hole.

Optionally, the die moving assembly includes a die moving shaft and a rotary holding bush, a fixed cylinder is installed at the tail of the tail plate, a die moving shaft is installed in the fixed cylinder, a tooth holding rod is sleeved on the die moving shaft, a first sealing oil cavity and a second sealing oil cavity are formed between the tooth holding rod and the die moving shaft, a rotary holding bush capable of rotating circumferentially is installed in a high-pressure die locking cylinder piston, a rotary gate oil cylinder assembly capable of driving the rotary holding bush to rotate circumferentially is installed on the outer end face of the high-pressure die locking cylinder piston, a plurality of first racks uniformly distributed on the same circumference are axially arranged on the inner cavity wall of the rotary holding bush, guide grooves are formed between two adjacent first racks, the tooth holding rod penetrates through the rotary holding bush, a plurality of second racks uniformly distributed on the same circumference are formed at the tail of the tooth holding rod, a tooth withdrawal groove is formed between two adjacent second racks, the distance between two adjacent teeth on the first racks is equal to the distance between the two adjacent teeth on the second racks, and the teeth on the first racks can rotate to enter into the tooth grooves on the first racks.

Optionally, the tooth holding rod is further provided with guide teeth corresponding to the second racks, and the guide teeth are located in front of the corresponding second racks.

Optionally, the length of the first rack is smaller than the length of the second rack.

Optionally, the front end face of the tooth of the first rack is a vertical face, and the rear end face of the tooth of the second rack is also a vertical face.

The invention has the following advantages:

1. the space occupying the original axial and radial directions of the equipment is not increased, compared with an external supporting and guiding structure, the space is saved, and the space occupying problem is solved;

2. the periodical uneven heavy impact load is effectively transferred and decomposed, the bearing capacity of the first wear-resistant ring and the second wear-resistant ring is reduced, and the stress concentration of the first wear-resistant ring and the second wear-resistant ring is further reduced, so that the service lives of the first wear-resistant ring and the second wear-resistant ring are prolonged, the oil leakage phenomenon can not occur within at least four years of a direct press, the large maintenance interval time is greatly prolonged, the large maintenance interval time can be prolonged to four years or even six years, and the direct economic loss caused by shutdown large maintenance is avoided;

3. the oil cavities at the two ends of the guide rod are communicated, so that the effective high-pressure mold locking force is not reduced, the guide rod is soaked by hydraulic oil, and the characteristics of the hydraulic oil are fully utilized for heat dissipation and lubrication, so that the problems of heating and lubrication of the guide rod are not worried;

4. the high-pressure starting position of the die assembly has higher repeated precision, so that the die locking force is more balanced and stable, the service life of the die is prolonged, the service life of a high-pressure die locking oil cylinder is prolonged, and the noise of impact load is reduced;

5. the large maintenance of the high-pressure mold locking oil cylinder for two years is changed into common maintenance, and the abrasion-resistant ring in the support guide assembly can be replaced on the premise of not disassembling the whole machine by only disassembling fewer parts, so that the practical problems of maintenance are solved;

6. when the high pressure is generated, the axial thrust can be shared by a plurality of teeth, so that the service life of the teeth is prolonged, and the reliability of the high pressure generation of the direct press is ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic structural view of a tailgate;

FIG. 3 is a schematic diagram of the structure of a high pressure die lock cylinder piston;

FIG. 4 is a schematic view of the installation of the support guide assembly;

FIG. 5 is an enlarged schematic view of FIG. 4 at A;

FIG. 6 is a schematic illustration of the installation of a support guide assembly on a high pressure lock cylinder;

FIG. 7 is a schematic view of a support guide assembly;

FIG. 8 is a schematic diagram of a second support guide assembly;

FIG. 9 is a schematic diagram III of a support guide assembly;

FIG. 10 is a schematic cross-sectional view of B-B of FIG. 9;

FIG. 11 is a schematic structural view of an end cap assembly;

FIG. 12 is a schematic cross-sectional view of an end cap assembly;

FIG. 13 is a schematic view of the structure of the support guide assembly when removed;

fig. 14 is a schematic structural view of the straight-bar presser when the tooth-holding rod is reset;

FIG. 15 is a schematic view of the structure of the transfer module of the direct press at high pressure;

FIG. 16 is a schematic view of the structure of the tooth bar;

FIG. 17 is a schematic view of a swivel assembly;

in the figure, the device comprises a 1-support guide assembly, a 2-plug assembly, a 3-tail plate, a 4-high pressure mold locking cylinder cover, a 5-high pressure mold locking cylinder piston, a 6-first wear-resisting ring, a 7-second wear-resisting ring, an 8-first oil cavity, a 9-second oil cavity, a 10-guide hole, a 11-guide rod, a 12-third wear-resisting ring, a 13-guide ring, a 14-oil through groove, a 15-locking screw, a 16-oil inlet hole, a 17-first oil outlet hole, a 18-second oil outlet hole and a 19-polygonal hole, the device comprises a 20-oil hole, a 21-blocking cover, a 22-plug, a 23-sealing ring, a 24-supporting ring, a 31-blind hole, a 32-step through hole, a 104-moving shaft, a 105-tooth holding rod, a 106-first sealed oil cavity, a 107-second sealed oil cavity, a 108-rotating holding component, a 109-fixed cylinder, 111-guide teeth, 112-second racks, 113-tooth-retreating grooves, 121-rotating holding bushings, 122-guide grooves, 123-first racks and 124-rotating brake oil cylinder components.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 and 4, a rear die device of a direct press comprises a tail plate 3, a high-pressure die-locking cylinder cover 4 and a high-pressure die-locking cylinder piston 5, wherein the high-pressure die-locking cylinder cover 4 is arranged on the end face of the tail plate 3 through locking screws, the high-pressure die-locking cylinder cover 4 is sealed with the tail plate 3, one end of the high-pressure die-locking cylinder piston 5 is in sliding fit with the tail plate 3, the other end of the high-pressure die-locking cylinder piston 5 is in sliding fit with the high-pressure die-locking cylinder cover 4, a first oil cavity 8 is arranged between the high-pressure die-locking cylinder piston 5 and the tail plate 3, a second oil cavity 9 is arranged among the tail plate 3, the high-pressure die-locking cylinder cover 4 and the high-pressure die-locking cylinder piston 5, when oil is injected into the first oil cavity 8, when the second oil injection cavity is ejected, the high-pressure die-locking cylinder piston 5 is contracted, as shown in fig. 4 and 5, a plurality of support guide assemblies 1 are axially arranged on the step surface of the tail plate 3, a guide hole 10 corresponding to the support guide assemblies 1 is formed in the high-pressure die-locking cylinder cover 4, and the other end of the support guide assembly 1 is always in sliding fit with the guide hole 10, so that when the high-pressure die-locking cylinder piston 5 is assembled, the support guide assemblies 1 have guiding and positioning functions, namely after the guide hole 10 is aligned with the support guide assemblies 1, the assembly of the high-pressure die-locking cylinder piston 5 and the tail plate 3 can be realized, the assembly between the high-pressure die-locking cylinder piston 5 and the tail plate 3 is further limited by one positioning, the assembly precision between the high-pressure die-locking cylinder piston 5 and the tail plate 3 is further improved, and when the high-pressure die-locking cylinder piston 5 and the tail plate 3 are assembled, the gravity of the high-pressure mode locking cylinder piston 5 is supported by the matching part of the tail plate 3 and the high-pressure mode locking cylinder piston 5 and the supporting and guiding assembly 1, so that the supporting and guiding assembly 1 shares the bearing capacity of the tail plate 3, the bearing capacity of the first wear-resisting ring 6 and the second wear-resisting ring 7 is reduced, the stress concentration of the first wear-resisting ring 6 and the second wear-resisting ring 7 is reduced, the bearing capacity distribution of the first wear-resisting ring 6 and the second wear-resisting ring 7 on the circumference is more uniform, the service lives of the first wear-resisting ring 6 and the second wear-resisting ring 7 are prolonged, the large maintenance interval time of the high-pressure mode locking device of the direct economic loss caused by shutdown and large maintenance is prolonged to four years or even six years.

In the present embodiment, as shown in fig. 7, 8, 9 and 10, the support guide assembly 1 includes a guide rod 11, as shown in fig. 5 and 5, one end of the guide rod 11 is mounted on a stepped surface of the tail plate 3, the other end of the guide rod 11 is located in a guide hole 10, as shown in fig. 7, 8 and 10, a guide ring 13 is mounted on the guide rod 11, the guide ring 13 is slidably fitted with the guide hole 10, third wear-resistant rings 12 are mounted on the guide rod 11 located at both sides of the guide ring 13 in the axial direction, the third wear-resistant rings 12 are all located in the guide hole 10, the guide ring 13 adopts an Orkot terkot ring, and the third wear-resistant rings 12 adopt Orkot wear-resistant rings, in the present embodiment, as shown in fig. 5, the diameters of the third wear-resistant rings 12 and the guide ring 13 are both larger than the diameters of the guide rod 11, so that the guide rod 11 located in the guide hole 10 has a gap between the guide hole 10 and the guide hole 10 in the circumferential direction, the support guide component 1 is in flexible contact with the high-pressure mold locking cylinder piston 5, the excellent performance of a flexible wear-resistant ring in hydraulic pressure is utilized and is used in the support guide component 1, the rigid guide rod 11 is matched, the periodic uneven heavy impact load born by the high-pressure mold locking cylinder piston 5 in operation is shared, the service life of the mold locking device is prolonged, the interval time of large maintenance of a well is prolonged, in use, the number of the guide rings 13 is two, the axial intervals are arranged, the guide rings 13 mainly play a bearing role, the third wear-resistant ring 12 can effectively adsorb pollution particles in hydraulic oil, the reliable and stable operation of a servo valve is ensured, in the embodiment, as shown in figure 6, a plurality of support guide components 1 are distributed on the same circumference, preferably, the support guide components 1 adopt a matrix distribution type design, the force points of the clamping force are uniformly distributed and further offset the radial force, so that the axial clamping force is more balanced and stable, and in other embodiments, a plurality of support guide assemblies 1 can be uniformly distributed on the same circumference, so that the load born by the original high-pressure clamping cylinder piston 5 is reasonably shared, the service life of the oil cylinder is greatly prolonged, and the support guide assemblies 1 of the embodiment also have the guide function, so that the position of the die clamping at each time for starting high pressure has higher repeated precision, and the service life of the die is prolonged.

In this embodiment, as shown in fig. 2, a blind hole 31 is formed on the step surface of the tail plate 3, a locking screw hole is formed at the bottom of the blind hole 31, as shown in fig. 10, a step through hole 32 is axially formed in the guide rod 11, and the step through hole 32 is provided with a locking screw 15 through threaded fit, so that an internal thread matched with the locking screw 15 is formed in the step through hole 32, one end of the guide rod 11 is matched in the blind hole 31, and the locking screw 15 is locked with the locking screw hole, so that the support guide assembly 1 can be detached, and the guide ring 13 and the third wear-resisting ring 12 are convenient to replace.

In this embodiment, the guide rod 11 inserted into the blind hole 31 is a positioning end of the guide rod 11, as shown in fig. 7 and 8, a plurality of oil through grooves 14 are formed on an outer circle of the positioning end, when the high-pressure mode-locking cylinder piston 5 is ejected, the oil through grooves 14 are communicated with the first oil cavity 8, the guide rod 11 is also provided with oil through holes 20, the oil through grooves 14 are provided with oil inlet holes 16, the oil inlet holes 16 are communicated with the oil through holes 20, one end of the oil through holes 20 close to the blind hole 31 is a second oil outlet hole 18, and one end far away from the blind hole 31 is a first oil outlet hole 17, preferably, the oil through grooves 14 are axially provided, the number of the oil through grooves 14 is four, the four oil through grooves 14 are uniformly distributed on the same circumference, the number of the oil through holes 20 corresponding to the oil through grooves 14 is also axially provided, the end face of the positioning end is provided with counter bores, as shown in fig. 4 and 5, the counter bore is communicated with the step through hole 32, one end of the oil through hole 20 is communicated with the counter bore, namely, the second oil outlet 18 is communicated with the counter bore, the other end of the oil through hole 20 is communicated with the guide hole 10, namely, the first oil outlet 17 is communicated with the guide hole 10, so that the guide hole 10, the oil through hole 20, the counter bore and the step through hole 32 form a circulating oil path, the support guide assembly 1 is always in the process of soaking hydraulic oil, the hydraulic oil can play a lubricating role, the service life of the support guide assembly 1 is ensured, and the oil cavities at two ends of the guide rod 11 are always in a communicating state due to the fact that the oil through holes 20 are communicated at two ends of the guide rod 11, so that effective high-pressure die locking force is not reduced, and the reliability of the use of the high-pressure die locking device of the direct press is ensured.

In this embodiment, as shown in fig. 10, the guide hole 10 is a through hole, as shown in fig. 4 and 5, the other end of the guide hole 10 far away from the support guide assembly 1 is provided with a plug 21 assembly 2, the plug 21 assembly 2 is detachably installed on the high-pressure die-locking cylinder piston 5, further, as shown in fig. 11 and 12, the plug 21 assembly 2 comprises a plug 21, the plug 21 is installed on the high-pressure die-locking cylinder piston 5 through a locking screw, the end surface of the plug 21 does not protrude out of the end surface of the high-pressure die-locking cylinder piston 5, the through hole is formed in the plug 21, the through hole is blocked by a plug 22, an annular sealing groove is formed in the plug 21, a sealing ring 23 is installed in the sealing groove, the sealing ring 23 is extruded on the inner side wall of the guide hole 10, further, as shown in fig. 10 and 11, a supporting ring 24 is also sleeved on the sealing groove, the supporting ring 24 is positioned on the outer side of the corresponding sealing groove, the blocking cover 21 assembly 2 is a normally closed piece, when the supporting guide assembly 1 is not replaced, the blocking cover 21 assembly 2 always blocks the guide hole 10 so as to avoid leakage of hydraulic oil in the guide hole 10, and by the arrangement of the blocking cover 21 assembly 2, the supporting guide assembly 1 can be disassembled without disassembling the tail plate 3, the movable and high-pressure die-locking cylinder cover 4, namely, the blocking cover 22 is disassembled, then a screw rod penetrates from the through hole and is clamped with the head of the locking screw rod 15, in order to facilitate the reliability of the connection between the screw rod and the locking screw rod 15, as shown in fig. 9, a polygonal hole 19 is formed at the head of the locking screw rod 15, preferably, the polygonal hole 19 is a hexagonal hole, the front end of the screw rod is a hexagonal prism corresponding to the hexagonal hole, and the locking screw rod 15 is driven to rotate by rotating the screw rod, and then the locking screw 15 is loosened, so that the locking screw 15 is firstly taken out, as shown in fig. 13, then a special screw is adopted to be inserted from the through hole and matched with the internal thread of the stepped through hole 32 on the guide rod 11, then an axial pulling force is adopted, so that the guide rod 11 and the blanking cover 21 can be taken out, and the blanking cover 21 assembly 2 and the supporting guide device can be detached, when the assembly is carried out, the guide rod 11 is firstly installed in the guide hole 10, of course, after the third abrasion-resistant ring 12 and the guide ring 13 on the guide rod 11 are assembled, the locking screw 15 can be firstly matched with the guide rod 11 to be installed in the guide hole 10 together, then the screw is inserted into the hexagonal hole of the locking screw hole again, because the guide ring 13 is matched with the guide hole 10, after the guide rod 11 and the locking screw 15 are installed, the guide rod 11 and the locking screw 15 are in the axial direction, therefore, the locking screw rod 15 is aligned with the locking screw hole, and the locking screw rod 15 is driven to rotate along with the screw rod, so that the locking screw rod 15 is locked with the locking screw hole, in order to increase the locking force of the locking screw rod 15 and the locking screw hole, a spring washer is sleeved at the head part of the locking screw rod 15, and the spring washer is provided with a notch, so that hydraulic oil can enter into the step through hole 32 from the notch, when the locking screw rod 15 is locked with the locking screw hole, the end face of the positioning end is abutted with the step surface, thereby completing the installation of the support guide assembly 1, and then the plugging cover 21 assembly 2 is assembled, therefore, in the small-scale maintenance of the normal direct-pressure machine, the high-pressure die-locking cylinder piston 5 and the high-pressure die-locking cylinder cover 4 are not required to be disassembled, the maintenance time is shortened, and the high-pressure die-locking cylinder piston 5 and the high-pressure die-locking cylinder cover 4 are not required to be disassembled, the direct press after overhauling can be directly used without testing, and time is saved, so that the economic influence on enterprises is small.

In this embodiment, as shown in fig. 1, a movable mold assembly capable of axially extending and contracting is further installed in the high-pressure mold locking cylinder piston 5, as shown in fig. 14 and 15, the movable mold assembly includes a movable mold shaft 104 and a rotary holding sleeve 121, a fixed cylinder 109 is installed at the tail of the tail plate 3, the movable mold shaft 104 is installed in the fixed cylinder 109, a tooth holding rod 105 is sleeved on the movable mold shaft 104, a first sealed oil cavity 106 and a second sealed oil cavity 107 are provided between the tooth holding rod 105 and the movable mold shaft 104, a rotary holding assembly 108 capable of circumferentially rotating is installed in the high-pressure mold locking cylinder piston 5, the rotary holding assembly 108 includes a rotary holding sleeve 121 and a rotary gate cylinder assembly 124, and the rotary gate cylinder assembly 124 drives the rotary holding sleeve 121 to circumferentially rotate in the high-pressure mold locking cylinder piston 5, in this embodiment, that is, the rotary gate cylinder assembly 124 drives the rotary holding sleeve 121 to circumferentially rotate in the high-pressure mold locking cylinder piston 5 in a general structure on a direct press, which is not repeated.

In this embodiment, as shown in fig. 17, a plurality of first racks 123 uniformly distributed on the same circumference are axially disposed on the inner cavity wall of the rotary holding sleeve 121, a guide groove 122 is formed between two adjacent first racks 123, the holding rod 105 penetrates through the rotary holding sleeve 121, as shown in fig. 14, 15 and 16, a plurality of second racks 112 uniformly distributed on the same circumference are disposed at the tail of the holding rod 105, a tooth-withdrawing groove 113 is formed between two adjacent second racks 112, the spacing between two adjacent teeth on the first racks 123 is equal to the spacing between two adjacent teeth on the second racks 112, and the teeth on the first racks 123 can rotate into the tooth grooves between two adjacent teeth on the first racks 123, as shown in fig. 15, when the holding rod 105 needs to be extended, oil is injected into the second sealing oil cavity 107, at this time, the holding rod 105 is extended, on the axial projection surface, the axial projection of the second rack 112 is located in the axial projection of the guide groove 122, and then during the extension process of the tooth holding rod 105, the second rack 112 enters the guide groove 122, after the guide rod 11 extends to the proper position, the rotary brake cylinder assembly 124 works, so that the rotary brake bushing 121 rotates, the teeth of the second rack 112 enter the tooth grooves of the first rack 123, then the direct press starts high pressure, the high pressure mold locking cylinder piston 5 extends to drive the rotary brake assembly 108 to axially move together, when the teeth of the first rack 123 abut against the teeth of the second rack 112, the high pressure mold locking cylinder piston 5, the rotary brake cylinder assembly 108 and the tooth holding rod 105 synchronously move, when the direct press completes high pressure, the rotary brake cylinder assembly 124 works, so that the rotary brake bushing 121 reversely rotates, the teeth of the second rack 112 exit the tooth grooves of the first rack 123, and the second rack 112 enters the guide groove 122, the first rack 123 is located in the tooth-withdrawing groove 113, hydraulic oil is injected into the first sealed oil cavity 106, as shown in fig. 14, at this time, the tooth-holding rod 105 is contracted and reset, then the high-pressure die-locking cylinder piston 5 is reset, and the high-pressure start of the direct press is finished.

In this embodiment, as shown in fig. 16, the tooth holding rod 105 is further provided with a guide tooth 111 corresponding to the second rack 112, the guide tooth 111 is located in front of the corresponding second rack 112, when the tooth holding rod 105 is in a reset state, the guide tooth 111 is located at the rear side of the rotary holding sleeve 121, further, when the guide tooth 111 is matched with the guide groove 122, the guide tooth 111 and the guide groove 122 are in a sliding fit relationship when the guide tooth 111 is in the guide groove 122, and further, the circumferential position of the tooth holding rod 105 can be limited through the guide tooth 111, that is, when the circumferential position of the tooth holding rod 105 deviates, the guide tooth 111 cannot enter the guide tooth 111, and further, the guide tooth 111 cannot damage the first rack 123, and further, the front end face of the guide tooth 111 is a bevel, and the rear end inner cavity of the rotary holding sleeve 121 is also provided with a bevel, so when the circumferential position of the tooth holding rod 105 deviates, the bevel of the guide tooth 111 abuts against the bevel of the tooth holding rod 105, and the tooth holding rod 105 cannot move axially forward, and the impact of the rotary holding sleeve 121 is reduced by the bevel.

In this embodiment, as shown in fig. 14 and 15, the length of the first rack 123 is smaller than that of the second rack 112, so that when the direct-pressure machine starts to press at high pressure, teeth on the first rack 123 can be abutted against teeth on the second rack 112, so that axial thrust of the direct-pressure machine when the direct-pressure machine starts to press at high pressure can be supported by the teeth components of the first rack 123 and the second rack 112, impact loads of a single tooth on the first rack 123 and a single tooth on the second rack 112 are reduced, service lives of the first rack 123 and the second rack 112 are prolonged, and reliability of the direct-pressure machine in starting to press at high pressure is guaranteed.

In this embodiment, as shown in fig. 14 and 15, the front end face of the tooth of the first rack 123 is a vertical face, and the rear end face of the tooth of the second rack 112 is also a vertical face, so that after the first rack 123 and the second rack 112 abut, there is no radial component force, thereby ensuring the reliability of the high-pressure operation of the direct press.

In this embodiment, as shown in fig. 14 and 15, the first rack 123 and the second rack 112 are six, and the first rack 123 has eight teeth and six tooth slots, so that when the direct press is at high pressure, the axial thrust is shared by forty two groups of teeth, so that the reliability of the direct press at high pressure is further ensured.

The working process of the invention is as follows: when the direct press is at high pressure, oil is injected into the second sealed oil cavity 107, at this time, the tooth holding rod 105 stretches out, the second rack 112 enters into the guide groove 122, after the guide rod 11 stretches out to the right, then the rotary brake cylinder assembly 124 works, so that the rotary brake bushing 121 rotates, the teeth of the second rack 112 enter into the tooth grooves of the first rack 123, then the direct press is at high pressure, the high-pressure mold locking cylinder piston 5 stretches out, the rotary brake cylinder assembly 108 is driven to axially move together, after the teeth of the first rack 123 abut against the teeth of the second rack 112, the high-pressure mold locking cylinder piston 5, the rotary brake cylinder assembly 108 and the tooth holding rod 105 synchronously move, when the direct press is at high pressure, and when the reset is needed, the rotary brake cylinder assembly 124 works, so that the rotary brake cylinder assembly 121 reversely rotates, the teeth of the second rack 112 exit the tooth grooves of the first rack 123, the second rack 112 enters into the guide groove 122, the first rack 123 is positioned in the tooth grooves, then the first rack 113 is injected into the first sealed oil cavity 106, as shown in the figure, and the high-pressure hydraulic oil is reset, and the direct press is stopped, and the high-pressure cylinder 105 is reset.

With the long-term use of direct press, when need carry out little maintenance, then dismantle end cap 22 earlier, then adopt a screw rod to penetrate from the through-hole, and block with the head of locking screw 15, through rotating the screw rod, thereby drive locking screw 15 rotation, and then make locking screw 15 become flexible, thereby take out locking screw 15 earlier, as shown in the drawings, then adopt special screw rod to insert from the through-hole and with the internal thread cooperation of step through-hole 32 on guide bar 11, then adopt axial pulling force, thereby take out guide bar 11 and blanking cap 21, and then can dismantle blanking cap 21 subassembly 2 and support guider, thereby accomplish the change of third sealing ring, guide ring 13, after the change is accomplished, then first pack into guiding hole 10 with the guide bar 11 after all assembled, and locking screw 15 then can pack into guiding hole 10 together with the cooperation of guide bar 11, then reuse screw rod inserts into the hexagon hole of locking screw, along with the screw rod drive locking screw 15 rotation, thereby make locking screw 15 and locking screw hole 15 with locking screw hole, after the terminal surface 15 and the locating surface then with the locating surface, the blanking cap 21 is then installed with the locating surface, and then the blanking cap 2 can be installed, thereby, after the completion of installing the assembly with the locating cap 21, and then can be installed.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims (10)

1. The utility model provides a back mould device of straight press, includes tailboard, high pressure mode locking cylinder cap, high pressure mode locking cylinder piston, and high pressure mode locking cylinder cap is installed on the terminal surface of tailboard, and seals between high pressure mode locking cylinder cap and the tailboard, and high pressure mode locking cylinder piston's one end sliding fit is in the tailboard, and high pressure mode locking cylinder piston's the other end sliding fit is in high pressure mode locking cylinder cap, its characterized in that: the high-pressure die locking cylinder is characterized in that a plurality of supporting guide assemblies are axially arranged on the step surface of the tail plate, guide holes corresponding to the supporting guide assemblies are formed in the high-pressure die locking cylinder cover, the other ends of the supporting guide assemblies are always in sliding fit with the guide holes, and a die shifting assembly capable of axially stretching is further arranged in the high-pressure die locking cylinder piston.

2. The back mold device of a direct press as set forth in claim 1, wherein: the support guide assembly comprises a guide rod, one end of the guide rod is installed on the step surface of the tail plate, the other end of the guide rod is located in the guide hole, a guide ring is installed on the guide rod and is in sliding fit with the guide hole, third wear-resistant rings are installed on the guide rod on two axial sides of the guide ring, the third wear-resistant rings are all located in the guide hole, and a gap is reserved between the guide rod in the guide hole and the guide hole in the circumferential direction.

3. A back die apparatus of a direct press as set forth in claim 2, wherein: the blind hole is formed in the step surface of the tail plate, a locking screw hole is formed in the bottom of the blind hole, a step through hole is formed in the guide rod in the axial direction, a locking screw rod is mounted in the step through hole through threaded fit, one end of the guide rod is fit in the blind hole, and the locking screw rod is locked with the locking screw hole.

4. A back die apparatus of a direct press as set forth in claim 3, wherein: the guide rod inserted into the blind hole is a positioning end of the guide rod, a plurality of oil grooves are formed in the outer circle of the positioning end, when the high-pressure die-locking oil cylinder piston is ejected, the oil grooves are communicated with the first oil cavity, oil holes are further formed in the guide rod, oil inlet holes are formed in the oil grooves, the oil inlet holes are communicated with the oil holes, counter bores are formed in the end face of the positioning end, the counter bores are communicated with the step through holes, one end of each oil hole is communicated with the counter bores, the other end of each oil hole is communicated with the corresponding guide hole, and the guide holes, the oil holes and the step through holes form a circulating oil way.

5. The back mold device of a direct press as set forth in claim 4, wherein: the guide hole is a through hole, and the other end of the guide hole, which is far away from the support guide assembly, is provided with a blanking cover assembly.

6. The back mold device of a direct press as set forth in claim 5, wherein: the blanking cover assembly comprises a blanking cover, a through hole is formed in the blanking cover, the through hole is plugged through a plug, an annular sealing groove is formed in the blanking cover, a sealing ring is installed in the sealing groove, and the sealing ring is extruded on the inner side wall of the guide hole.

7. The back mold device of a direct press according to any one of claims 1 to 6, wherein: the die moving assembly comprises a die moving shaft and a rotary holding bush, a fixed cylinder is arranged at the tail part of the tail plate, a die moving shaft is arranged in the fixed cylinder, a tooth holding rod is sleeved on the die moving shaft, a first sealing oil cavity and a second sealing oil cavity are formed between the tooth holding rod and the die moving shaft, a rotary holding bush capable of rotating circumferentially is arranged in a high-pressure die locking cylinder piston, a rotary gate oil cylinder assembly capable of driving the rotary holding bush to rotate circumferentially is arranged on the outer end surface of the high-pressure die locking cylinder piston, a plurality of first racks uniformly distributed on the same circumference are axially arranged on the inner cavity wall of the rotary holding bush, guide grooves are formed between two adjacent first racks, the tooth holding rod penetrates through the rotary holding bush, a plurality of second racks uniformly distributed on the same circumference are formed at the tail part of the tooth holding rod, tooth retreating grooves are formed between two adjacent second racks, the distance between two adjacent teeth on the first racks is equal to the distance between the two adjacent teeth on the second racks, and the teeth on the first racks can enter the tooth grooves on the first racks which can be equal to the distance between the teeth on the second racks.

8. The back mold device of a direct press as set forth in claim 7, wherein: the tooth holding rod is further provided with guide teeth corresponding to the second racks, and the guide teeth are positioned in front of the second racks.

9. The back mold device of a direct press as set forth in claim 8, wherein: the length of the first rack is smaller than that of the second rack.

10. The back mold device of a direct press as set forth in claim 9, wherein: the front end face of the tooth of the first rack is a vertical face, and the rear end face of the tooth of the second rack is also a vertical face.

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