CN112590133B

CN112590133B - Forming die of automobile guard plate

Info

Publication number: CN112590133B
Application number: CN202110238224.6A
Authority: CN
Inventors: 朱浩伟; 郑舟祥; 陈银峰; 朱灵勇; 范利
Original assignee: Ningbo Huazhong Plastics Co ltd
Current assignee: Ningbo Huazhong Plastics Co ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-05-04
Anticipated expiration: 2041-03-04
Also published as: CN112590133A

Abstract

The application discloses a forming die for an automobile guard plate, which comprises a fixed die component and a movable die component, wherein a cavity for forming the automobile guard plate is formed between the fixed die component and the movable die component; a first core pulling mechanism and a second core pulling mechanism which extend into the cavity are arranged in the fixed die component; the fixed die component comprises a first fixed die plate and a second fixed die plate, and a floating assembly is arranged between the first fixed die plate and the second fixed die plate; a hot runner system is arranged in the fixed die component, the hot runner system comprises a hot nozzle extending downwards to the cavity, a nozzle sleeve sleeved outside the hot nozzle is further arranged in the fixed die component, and a cooling water channel is formed in the nozzle sleeve; and a cooling air passage is formed in the nozzle sleeve, and an air inlet of the cooling air passage is communicated with the second fixed template and is connected into an air supply system. Has the advantages of compact structure, high forming quality, safety, reliability and long service life.

Description

Forming die of automobile guard plate

Technical Field

The application relates to the field of molds, in particular to a forming mold for an automobile plastic part.

Background

As shown in fig. 1 and 2, the automobile fender (100) is an integrated automobile fender (100), and the automobile fender (100) is L-shaped, and includes an a-pillar lower fender (101) and a left front threshold fender (102), which are used for respectively protecting an a-pillar and a left front threshold and playing a decorative role. An installation cavity (103) which is concave inwards is arranged on the outer side of the left front threshold guard plate (102), an engine hood handle is suitable for being installed in the installation cavity (103), an upper clamping seat (104) and a lower clamping seat (105) are arranged on the inner side of the left front threshold guard plate (102), and the upper clamping seat (104) and the lower clamping seat (105) are respectively suitable for installing a buckle and are used for fixing the automobile guard plate (100). This car backplate (100) are through injection moulding, because the opening orientation of installation cavity (103), last cassette (104) and lower cassette (105) all is unanimous with the mould die sinking direction, consequently has increased the design degree of difficulty of car backplate forming die.

How to design the forming die of the automobile guard plate to ensure the forming quality of the automobile guard plate is a problem to be solved urgently by technical personnel in the field.

Disclosure of Invention

An object of this application is to provide a compact structure, shaping high quality, safe and reliable, long service life's forming die of car backplate.

Another object of this application is to provide a mechanism of loosing core of car backplate forming die that simple structure is reliable, and the shaping quality is high, arranges rationally.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the utility model provides a forming die of car backplate, includes cover half part and movable mould part, cover half part with set up the die cavity of shaping car backplate between the movable mould part.

A first core pulling mechanism and a second core pulling mechanism which extend into the cavity are arranged in the fixed die component, the first core pulling mechanism is suitable for forming the installation cavity, and the second core pulling mechanism is suitable for forming the upper clamping seat; the fixed die component comprises a first fixed die plate and a second fixed die plate, and a floating assembly is arranged between the first fixed die plate and the second fixed die plate; the floating assembly is suitable for driving the first fixed die plate and the second fixed die plate to float relatively, so that the first core pulling mechanism is driven to obliquely pull the core outwards along the opening direction of the mounting cavity, and the second core pulling mechanism is driven to obliquely pull the core upwards along the opening direction of the upper clamping seat.

A hot runner system is arranged in the fixed die part, the hot runner system comprises a hot nozzle extending downwards to the die cavity, a nozzle sleeve sleeved outside the hot nozzle is further arranged in the fixed die part, the upper end of the nozzle sleeve is fixedly arranged in the second fixed die plate, a slideway penetrating through the first fixed die plate to the die cavity is formed in the first fixed die plate along the vertical direction, and the nozzle sleeve is suitable for penetrating through the slideway; the lower end of the nozzle sleeve is provided with a butt joint, the lower end of the slideway is provided with a butt joint cavity, the lower end of the hot nozzle is tightly attached to the inner wall of the butt joint, and when the forming die is closed, the outer wall of the butt joint is tightly attached to the inner wall of the butt joint cavity.

The movable mould part comprises a movable mould plate, a butt joint seat is arranged on the movable mould plate and is positioned below the nozzle sleeve, a abdicating groove is formed in the inner side of the butt joint seat, and an injection molding channel communicated with the cavity and the abdicating groove is further formed in the movable mould plate; when the forming die is closed, the lower end of the butt joint is tightly attached to the butt joint seat, and the hot nozzle is located in the abdicating groove.

And a cooling water channel is formed in the nozzle sleeve, and a water inlet and a water outlet of the cooling water channel are respectively communicated with the second fixed template and are connected into the water circulation system.

A cooling air passage is formed in the nozzle sleeve, an air inlet of the cooling air passage is communicated with the second fixed template and is connected into an air supply system, an air outlet of the cooling air passage is formed in the lower end of the butt joint, and an air tap is arranged at an air outlet of the cooling air passage and is suitable for controlling the opening and closing of the air outlet of the cooling air passage; when the forming mold is closed, the air tap is closed, and when the forming mold is opened, the air tap is opened.

Preferably, the first core pulling mechanism comprises a first sliding block and a first guide block, a first sliding chute penetrating from the outer side to the cavity is formed in the first fixed die plate, the first sliding block is arranged in the first sliding chute in a sliding manner, a first mold core is arranged on the inner side of the first sliding block, the first mold core is suitable for penetrating through the first sliding chute and entering the cavity, the first mold core is used for forming the installation cavity, the upper end of the first guide block penetrates through the first fixed die plate and is fixedly arranged on the second fixed die plate, an inclined guide block extends from the lower end of the first guide block, the inclined guide block inclines from top to bottom from inside to outside, and the first sliding block is arranged on the inclined guide block in a sliding manner; when the second fixed die plate floats upwards, the first guide block is driven to slide upwards, and then the first sliding block is driven to slide outwards in an inclined mode to achieve core pulling. The structure is simple and reliable, and can provide enough demoulding force.

As an improvement, a positioning block also extends out of the lower end of the inclined guide block, a positioning groove is formed below the first sliding groove, a first contact surface inclined from top to bottom from outside to inside is arranged on the outer side of the positioning block, and a second contact surface parallel to the first contact surface is arranged on the outer side of the positioning groove; when the forming mold is closed, the positioning block penetrates through the first sliding block and enters the positioning groove, the first contact surface abuts against the second contact surface, the outward movement trend of the first guide block and the first sliding block is limited, and the first mold core and the mold cavity are forced to be tightly attached. According to the scheme, the injection pressure is higher, and gaps are inevitably formed among the first sliding block, the first guide block and the first fixed template, so that the first sliding block can deviate outwards more or less under the action of the cavity pressure in the injection process, and a flash is formed; therefore, the positioning block and the positioning groove are arranged, the tight abutting effect of the first contact surface and the second contact surface is utilized, the first mold core and the mold cavity are tightly attached, the generation of flash is reduced, and the molding quality is improved.

Preferably, the second core pulling mechanism comprises a second sliding block, a second guide block and a third guide block, a second sliding groove penetrating from the upper side to the cavity is formed in the first fixed die plate, the second guide block is fixedly arranged on the first fixed die plate and located on two sides of the second sliding groove, the third guide block is fixedly arranged on the second fixed die plate, a second mold core is arranged at the lower end of the second sliding block and is suitable for penetrating through the second sliding groove and entering the cavity, and the second mold core is used for forming the upper clamping seat; the two sides of the second sliding block are arranged on the second guide block in a sliding mode, the upper end of the second sliding block is arranged on the third guide block in a sliding mode, the sliding track of the second sliding block on the second guide block is inclined from top to bottom from inside to outside, and the sliding track of the second sliding block on the third guide block is inclined from top to bottom from outside to inside; and when the second fixed die plate floats upwards, the third guide block is driven to slide upwards, and the second slide block is driven to slide upwards in an inclined mode under the common guide limiting action of the second guide block and the third guide block to realize core pulling. The structure is simple and reliable, the second sliding block can perform composite sliding under the common guiding and limiting effect of the second guiding block and the third guiding block, and then core pulling is achieved obliquely upwards along the opening direction of the upper clamping seat.

Furthermore, a T-shaped sliding block is arranged at the upper end of the second sliding block, a T-shaped sliding groove which is inclined from top to bottom from outside to inside is formed in the lower end of the third guide block, and the T-shaped sliding block is suitable for being arranged in the T-shaped sliding groove in a sliding mode. The cooperation of T type slider and T type spout can realize that the third guide block "draws" the second slider upwards, and the second slider can slide along third guide block slant.

As an improvement, the outer wall of the butt joint and the inner wall of the butt joint cavity correspondingly present a circular truncated cone-shaped structure inclined from top to bottom from outside to inside, and a compensation gap is formed between the nozzle sleeve and the slideway in the up-down direction. The arrangement of the circular truncated cone-shaped structures on the outer wall of the butt joint and the inner wall of the butt joint cavity can ensure that the outer wall of the butt joint and the inner wall of the butt joint cavity can be always tightly attached to each other when the mold is closed; the arrangement of the compensation gap can ensure that the butt joint can always abut against the butt joint seat when the die is closed, and avoids the gap between the butt joint and the butt joint seat caused by the limitation of the nozzle sleeve by the slideway; in addition, when the butt joint is gradually worn, the compensation clearance is gradually reduced under the condition that the deformation of the whole die is allowed, so that the direct contact between the butt joint and the butt seat is ensured.

Preferably, the air cock includes casing and core bar subassembly, threaded hole is seted up in the exit of cooling air flue, the casing is for having the cylindric structure of external screw thread, the casing is suitable for along upper and lower direction threaded connection in threaded hole, just the casing upper end with be provided with the sealing washer between the butt joint, the casing lower extreme with the butt joint lower extreme flushes.

The upper end of the shell is provided with an air outlet communicated with the cooling air passage, and the core rod assembly is arranged in the shell and is suitable for opening and closing the air outlet.

The mounting mode of the air faucet is simple and reliable, the sealing performance is good, and the mounting is convenient.

Specifically, the core bar assembly comprises a sliding seat, a telescopic rod, a reset spring, an upper sealing block and a lower sealing block, the sliding seat is fixedly arranged in the shell, the telescopic rod is arranged in the sliding seat in a sliding mode along the vertical direction, the reset spring is arranged between the sliding seat and the telescopic rod, the upper sealing block is fixedly arranged at the upper end of the telescopic rod, and the lower sealing block is fixedly arranged at the lower end of the telescopic rod.

The return spring can force the telescopic rod to slide upwards, and the upper sealing block blocks the air outlet hole, and the air nozzle is in a closed state at the moment; when the air tap is in a closed state, the periphery of the lower sealing block is tightly attached to the inner wall of the shell, and the lower end of the lower sealing block is flush with the lower end of the shell; when the air pressure in the cooling air passage is increased, the air pressure difference can overcome the elasticity of the return spring, so that the telescopic rod slides downwards, the upper sealing block moves downwards and opens the air outlet, and meanwhile, the lower sealing block moves downwards to enable the lower end of the shell to be opened, and at the moment, the air faucet is in an open state.

The structure has the following characteristics besides the basic function of the air tap.

(1) The setting of lower sealed piece has certain sealed effect when the air cock is closed, guarantees the leakproofness of air cock with the cooperation of last sealed piece on the one hand, and on the other hand melting plastics get into the air cock and influence the normal use of air cock when can avoiding moulding plastics.

(2) Because reset spring's existence, when not aerifing in the cooling air flue, no matter the mould is in the in-process of compound die, die sinking or open and shut mould, the air cock is in the closure state all the time, can avoid debris to get into the cooling air flue on the one hand, and on the other hand can guarantee the planarization of butt joint lower extreme, plays the guard action to the mould under the non-operating condition.

(3) The air nozzle can be opened under the action of air pressure in the cooling air passage, so that the cooling air passage can be kept in an inflated state in the normal working process of the mold, and the air nozzle can be automatically opened in the mold opening state, the mold closing process and the mold opening process, so that the movable mold plate can be cleaned by air injection in the mold opening state and the mold closing process, and the stub bar is cooled by air injection in the mold opening process; and the air tap keeps the closed state under the cooperation of the lower sealing block and the butt joint seat in the die assembly state (namely in the injection molding process), so that the air tap can not give vent to air in the die assembly state, and the influence on normal injection molding is avoided.

Preferably, the upper ends of the upper sealing block and the lower sealing block are in truncated cone-shaped structures which are inclined from top to bottom from inside to outside; when the air tap is in a closed state, the upper end of the upper sealing block is embedded into the air outlet to realize plugging. The arrangement of the upper sealing block and the lower sealing block in the shape of a circular truncated cone can enable airflow to flow more smoothly; meanwhile, the lower sealing block in the shape of the circular truncated cone can enable the air injection range of the air nozzle to be larger, and the using effect of the air nozzle is guaranteed.

In order to conveniently install the air faucet, the lower end of the shell is provided with a plurality of clamping grooves, and air faucet keys are suitable to be inserted into the clamping grooves for rotating the air faucet; the air faucet key comprises an operating platform, wherein a plurality of clamping jaws extend outwards from the periphery of the operating platform, the clamping jaws are suitable for being inserted into the clamping grooves, the air faucet key is fixed on the air faucet along the circumferential direction, an operating hole is formed in the operating platform and suitable for being inserted into a rotating tool, and the axis of the shell penetrates through the center of the operating hole. The air tap key is essential in the manufacture and assembly of the mold.

In current mold design, to the similar side back-off structure of installation cavity, generally adopt the mode of side loosing core to carry out the drawing of patterns, can adopt the combination of oblique guide pillar and shaping slider usually, utilize the relative displacement of cover half and movable mould when the die sinking, make the shaping slider realize the drawing of patterns along oblique guide pillar slip. However, the volume of the installation cavity of the automobile guard plate in the scheme is large, the contact area with a forming die is also large, the adhesive force between the installation cavity and the forming die is large, the problem of insufficient demolding force exists when the conventional inclined guide pillar and forming slide block structure is used for demolding, the phenomena of unsmooth demolding, deformation of the automobile guard plate and the like are easily caused, and the forming quality is affected. Although the scheme that the cylinder drives the forming slide block to slide can be adopted, the problem of insufficient demoulding force is solved; however, the addition of the air cylinder inevitably increases the volume of the mold and increases the manufacturing cost of the mold.

Based on above-mentioned technical problem, the scheme that the cover half floated has been adopted in this application to solve the problem of installation cavity drawing of patterns difficulty. Specifically, a floating assembly (generally adopting a nitrogen spring) is arranged between a first fixed die plate and a second fixed die plate, so that the first fixed die plate and the second fixed die plate float relatively by utilizing the instantaneous elasticity of the floating assembly, and a first core pulling mechanism is driven to act to realize core pulling and demoulding; through the setting to the instantaneous elasticity size of subassembly that floats, can guarantee that first mechanism of loosing core has sufficient drawing of patterns power, and then guaranteed the shaping quality of car backplate. And the fixed die floating scheme does not increase the volume of the die, and the cost is lower than that of the additionally arranged air cylinder.

Aiming at the demoulding problem of the clamping seat on the automobile guard plate, the second core-pulling mechanism is additionally arranged on the basis of the fixed die floating structure, so that the second core-pulling mechanism can obliquely upwards pull cores along the opening direction of the upper clamping seat to complete demoulding.

The hot runner system of this scheme is installed in the cover half part, and the floating structure setting of cover half will make hot runner system follow the second cover half and take place to float. When the mold is closed, the high-speed floating of the hot runner system can cause the hot nozzle to contact the movable mold plate with large impact force, so that the hot nozzle is abraded or damaged, and the problem of high difficulty and high cost exists in the replacement of the hot nozzle. In order to solve the problems, the nozzle sleeve is sleeved outside the hot nozzle, the butt joint seat with the abdicating groove is arranged on the movable template, the nozzle sleeve is directly contacted with the movable template, the hot nozzle is positioned in the abdicating groove and is prevented from being contacted with the movable template, the hot nozzle is used for protecting the hot nozzle from damage, and the service life of the hot nozzle is prolonged.

And the opening of the cooling water channel in the nozzle sleeve can realize quick and uniform cooling, avoid the wire drawing phenomenon caused by overhigh temperature and ensure the forming quality.

In addition, due to the arrangement of the abdicating groove, the stub bar at the position is relatively thick, and if the stub bar cannot be cooled in time, the wire drawing phenomenon is easy to produce, the forming quality is influenced, the waste residue is easy to occur, and the next injection molding is influenced. Based on the problems, the scheme is also provided with the cooling air passage and the air nozzle, and the cooling air passage and the air nozzle are aligned to the butt joint seat to perform air injection cooling in the mold opening process, so that the stub bar in the yielding groove can be rapidly cooled, and the forming quality is ensured; in the mold closing process, the cooling air passage and the air nozzle are used for continuously injecting air to the movable mold plate, so that impurities such as dust on the movable mold plate can be removed, waste materials remained on the butt joint seat, particularly in the abdicating groove, can be removed, and the molding quality in the next injection molding process is ensured; and closing the air nozzle until the die assembly is finished.

Drawings

Fig. 1 and 2 are perspective views illustrating a vehicle fender formed according to a preferred embodiment of the present application.

Fig. 3 is a schematic perspective view of a preferred embodiment according to the present application.

FIG. 4 is a front view of a stationary mold part and a moving mold plate in accordance with a preferred embodiment of the present application.

Fig. 5 is a cross-sectional view taken along a-a in fig. 4, in accordance with a preferred embodiment of the present application.

FIG. 6 is an enlarged view at B of FIG. 5 in accordance with a preferred embodiment of the present application.

FIG. 7 is a schematic view of the internal structure of a stationary mold part in a preferred embodiment according to the present application.

FIG. 8 is a schematic view of the mating of the second stationary platen, the first core pulling mechanism, the second core pulling mechanism and the float assembly in accordance with a preferred embodiment of the present application.

FIG. 9 is a half sectional view of a first core pulling mechanism according to a preferred embodiment of the present application.

Fig. 10 is a perspective view of a second core pulling mechanism according to a preferred embodiment of the present application.

FIG. 11 is a bottom view of a second core pulling mechanism according to a preferred embodiment of the present application.

FIG. 12 is a bottom view of FIG. 4 in accordance with a preferred embodiment of the present application.

FIG. 13 is a cross-sectional view taken along the direction C-C in FIG. 12, in accordance with a preferred embodiment of the present application.

FIG. 14 is an enlarged view at D of FIG. 13 in accordance with a preferred embodiment of the present application.

Fig. 15 is a schematic view of the mating of the moving platen, nozzle sleeve and hot runner system according to a preferred embodiment of the present application.

FIG. 16 is a perspective view of a hot runner system according to a preferred embodiment of the present application.

FIG. 17 is a perspective view of a nozzle sleeve according to a preferred embodiment of the present application.

FIG. 18 is a top view of a nozzle sleeve according to a preferred embodiment of the present application.

FIG. 19 is a cross-sectional view taken along the direction E-E in FIG. 18, in accordance with a preferred embodiment of the present application.

FIG. 20 is a cross-sectional view taken along the direction F-F in FIG. 18, in accordance with a preferred embodiment of the present application.

FIG. 21 is an enlarged view at G of FIG. 20 (with the air cap in a closed position) in accordance with a preferred embodiment of the present application.

FIG. 22 is a half sectional view of a nozzle in an open position showing airflow in accordance with a preferred embodiment of the present application.

FIG. 23 is an exploded view of a gas nozzle in accordance with a preferred embodiment of the present application.

FIG. 24 is a perspective view of a valve key according to a preferred embodiment of the present application.

Fig. 25 is a perspective view of a first template according to a preferred embodiment of the present application.

Figure 26 is a schematic diagram of the structure of a chute according to a preferred embodiment of the present application.

Fig. 27 is a perspective view of a movable platen according to a preferred embodiment of the present application.

FIG. 28 is an enlarged view taken at H of FIG. 27 in accordance with a preferred embodiment of the present application.

In the figure: 100. an automobile guard plate; 101. a lower guard plate of the A column; 102. a left front threshold guard plate; 103. a mounting cavity; 104. an upper clamping seat; 105. and a lower clamping seat.

1. A stationary mold part; 2. a movable mold part; 3. a first core-pulling mechanism; 4. a second core-pulling mechanism; 5. a floating assembly; 6. a hot runner system; 7. a nozzle sleeve; 8. an air tap; 9. an air tap key; 10. a mold cavity.

11. A first fixed template; 12. a second fixed template; 13. a top plate; 111. a first chute; 112. positioning a groove; 113. a second chute; 114. a slideway; 1121. a second contact surface; 1141. a docking chamber; 21. moving the template; 211. a docking station; 212. a yielding groove; 213. injection molding a channel; 31. a first slider; 32. a first guide block; 311. a first core; 321. an inclined guide block; 322. positioning blocks; 3221. a first contact surface; 41. a second slider; 42. a second guide block; 43. a third guide block; 411. a second core; 412. a T-shaped slider; 431. a T-shaped chute; 61. a hot nozzle; 70. compensating for the clearance; 71. a butt joint; 72. a cooling water channel; 73. a cooling air passage; 731. a threaded hole; 80. a seal ring; 81. a housing; 82. a sliding seat; 83. a telescopic rod; 84. a return spring; 85. an upper sealing block; 86. a lower seal block; 811. an air outlet; 812. a card slot; 91. an operation table; 92. a claw; 93. and (6) operating the hole.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

It is intended that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application, be interpreted as covering a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 and fig. 2, the integrated automobile fender 100 is formed by using the present embodiment, the automobile fender 100 is L-shaped, and includes an a-pillar lower fender 101 and a left front threshold fender 102, an installation cavity 103 recessed inward is disposed on an outer side of the left front threshold fender 102, and an upper clamping seat 104 and a lower clamping seat 105 are disposed on an inner side of the left front threshold fender 102.

With respect to the structure of the automobile fender 100, in particular to the specific structures of the mounting cavity 103, the upper clamping seat 104 and the lower clamping seat 105, the present application designs a forming mold with the following structure.

As shown in fig. 3 to 28, the present embodiment includes a fixed mold member 1 and a movable mold member 2, and a cavity 10 for molding the automobile fender 100 is opened between the fixed mold member 1 and the movable mold member 2. A first core-pulling mechanism 3 and a second core-pulling mechanism 4 which extend into the cavity 10 are arranged in the fixed die part 1, the first core-pulling mechanism 3 is suitable for forming the installation cavity 103, and the second core-pulling mechanism 4 is suitable for forming the upper clamping seat 104; the fixed die component 1 comprises a first fixed die plate 11, a second fixed die plate 12 and a top plate 13, and a floating assembly 5 is arranged between the first fixed die plate 11 and the second fixed die plate 12; the floating assembly 5 is suitable for driving the first fixed die plate 11 and the second fixed die plate 12 to float relatively, further driving the first core pulling mechanism 3 to pull cores outwards in an inclined mode along the opening direction of the installation cavity 103, and driving the second core pulling mechanism 4 to pull cores upwards in an inclined mode along the opening direction of the upper clamping seat 104. The movable mold part 2 includes a movable mold plate 21. In this embodiment, the float assembly 5 is preferably a nitrogen spring.

The first core-pulling mechanism 3 has the following specific structure: as shown in fig. 9, the first core pulling mechanism 3 includes a first slider 31 and a first guide block 32, a first chute 111 penetrating from the outside to the cavity 10 is formed on the first fixed die plate 11, the first slider 31 is slidably disposed in the first chute 111, a first core 311 is disposed on the inner side of the first slider 31, the first core 311 is adapted to pass through the first chute 111 and enter the cavity 10, the first core 311 is used for molding the installation cavity 103, the upper end of the first guide block 32 passes through the first fixed die plate 11 and is fixedly disposed on the second fixed die plate 12, an inclined guide block 321 extends from the lower end of the first guide block 32, the inclined guide block 321 is inclined from the top to the bottom from the inside to the outside, and the first slider 31 is slidably disposed on the inclined guide block 321; when the second fixed die plate 12 floats upwards, the first guide block 32 is driven to slide upwards, and the first slide block 31 is further driven to slide outwards in an inclined mode to realize core pulling; it should be noted that the inclination angle of the first slider 31 is determined by the inclination angle of the opening of the mounting cavity 103, and is a conventional design in the art, and therefore is not specifically described in the present embodiment. As shown in fig. 6, the lower end of the inclined guide block 321 further extends out of the positioning block 322, the positioning groove 112 is disposed below the first sliding groove 111, the outer side of the positioning block 322 is provided with a first contact surface 3221 inclined from top to bottom from outside to inside, and the outer side of the positioning groove 112 is provided with a second contact surface 1121 parallel to the first contact surface 3221; when the forming mold is closed, the positioning block 322 passes through the first slider 31 and enters the positioning groove 112, the first contact surface 3221 abuts against the second contact surface 1121, and limits the outward movement trend of the first guide block 32 and the first slider 31, so that the first core 311 and the cavity 10 are forced to be tightly attached to reduce the generation of flash.

The second core-pulling mechanism 4 has the following specific structure: as shown in fig. 10 and 11, the second core pulling mechanism 4 includes a second slider 41, a second guide block 42 and a third guide block 43, a second sliding slot 113 penetrating from the upper side to the cavity 10 is formed in the first fixed die plate 11, the second guide block 42 is fixedly disposed on the first fixed die plate 11 and located at two sides of the second sliding slot 113, the third guide block 43 is fixedly disposed on the second fixed die plate 12, a second core 411 is disposed at the lower end of the second slider 41, the second core 411 is adapted to penetrate through the second sliding slot 113 and enter the cavity 10, and the second core 411 is used for forming the upper clamping seat 104; two sides of the second sliding block 41 are slidably arranged on the second guide block 42, the upper end of the second sliding block 41 is slidably arranged on the third guide block 43, the sliding track of the second sliding block 41 on the second guide block 42 is inclined from top to bottom from inside to outside, and the sliding track of the second sliding block 41 on the third guide block 43 is inclined from top to bottom from outside to inside; when the second fixed die plate 12 floats upwards, the third guide block 43 is driven to slide upwards, and the second slide block 41 is driven to slide upwards in an inclined manner under the common guide limiting action of the second guide block 42 and the third guide block 43 to realize core pulling; it should be noted that the specific inclination angle of the sliding track of the second sliding block 41 on the second guide block 42 and the third guide block 43 is determined by the inclination angle of the opening of the upper clamping seat 104, which is a conventional design in the art, and therefore is not specifically described in this embodiment. In this embodiment, the upper end of the second slider 41 is provided with a T-shaped slider 412, the lower end of the third guide block 43 is provided with a T-shaped sliding groove 431 inclined from top to bottom from outside to inside, and the T-shaped slider 412 is adapted to be slidably disposed in the T-shaped sliding groove 431.

In this embodiment, the mounting cavity 103 is mainly formed by the first core-pulling mechanism 3, the upper clamping seat 104 is mainly formed by the second core-pulling mechanism 4, and the lower clamping seat 105 is mainly formed by the movable platen 21 and depends on the movable mold part 2 to perform the inclined ejection to realize the demolding.

Due to the design requirements of the first core pulling mechanism 3 and the second core pulling mechanism 4, the fixed mold part 1 of the present embodiment adopts a scheme of fixed mold floating, so that the applicability of the hot runner system 6 needs to be improved to ensure the safety and reliability of the use thereof, which is specifically as follows.

As shown in fig. 13, the hot runner system 6 is disposed in the fixed mold part 1, the hot runner system 6 includes a hot nozzle 61 extending downward to the cavity 10, a nozzle sleeve 7 sleeved outside the hot nozzle 61 is further disposed in the fixed mold part 1, an upper end of the nozzle sleeve 7 is fixedly disposed in the second fixed mold plate 12, a chute 114 penetrating through the cavity 10 is disposed in the first fixed mold plate 11 along the up-down direction, and the nozzle sleeve 7 is adapted to pass through the chute 114; the lower end of the nozzle sleeve 7 is provided with a butt joint 71, the lower end of the slideway 114 is provided with a butt joint cavity 1141, the lower end of the hot nozzle 61 is tightly attached to the inner wall of the butt joint 71, and when the forming die is closed, the outer wall of the butt joint 71 is tightly attached to the inner wall of the butt joint cavity 1141. As shown in fig. 27 and 28, the movable mold plate 21 is provided with a docking seat 211, the docking seat 211 is located below the nozzle sleeve 7, the inner side of the docking seat 211 is provided with a relief groove 212, and the movable mold plate 21 is further provided with an injection molding channel 213 communicating the cavity 10 and the relief groove 212; when the forming mold is closed, the lower end of the butt joint 71 is tightly attached to the butt joint seat 211, and the hot nozzle 61 is positioned in the receding groove 212. As shown in fig. 19, a cooling water channel 72 is formed in the nozzle sleeve 7, and a water inlet and a water outlet of the cooling water channel 72 are respectively communicated with the second fixed die plate 12 and are connected to the water circulation system. As shown in fig. 20, a cooling air duct 73 is formed in the nozzle sleeve 7, an air inlet of the cooling air duct 73 is communicated with the second fixed die plate 12 and is connected to the air supply system, an air outlet of the cooling air duct 73 is formed at the lower end of the butt joint 71, an air tap 8 is arranged at the air outlet of the cooling air duct 73, and the air tap 8 is suitable for controlling the opening and closing of the air outlet of the cooling air duct 73; when the forming mold is closed, the air tap 8 is closed, and when the forming mold is opened, the air tap 8 is opened.

As shown in fig. 14, in the present embodiment, the outer wall of the docking head 71 and the inner wall of the docking cavity 1141 correspondingly present a truncated cone-shaped structure inclined from top to bottom and from outside to inside, and the compensation gap 70 is provided between the nozzle sleeve 7 and the slideway 114 in the up-down direction.

As shown in fig. 18 and 19, the cooling water passage 72 of the present embodiment has two and is U-shaped. Set up two cooling water channels 72, make the staff can be according to hot nozzle 61 temperature adjustment cooling methods, both reached the cooling to hot nozzle 61, avoid it because of the high wire drawing phenomenon that produces of high temperature, can avoid again because of cooling too fast leading to the too early solidification of sizing material, improve product quality.

As shown in fig. 21 to 23, the air faucet 8 includes a housing 81 and a core bar assembly, a threaded hole 731 is opened at an outlet of the cooling air duct 73, the housing 81 has a cylindrical structure with an external thread, the housing 81 is suitable for being screwed into the threaded hole 731 in an up-down direction, a sealing ring 80 is disposed between an upper end of the housing 81 and the butt joint 71, and a lower end of the housing 81 is flush with a lower end of the butt joint 71. An air outlet hole 811 communicated with the cooling air passage 73 is formed at the upper end of the housing 81, and the core bar assembly is arranged in the housing 81 and is suitable for opening and closing the air outlet hole 811. The core rod assembly comprises a sliding seat 82, an expansion rod 83, a return spring 84, an upper sealing block 85 and a lower sealing block 86, the sliding seat 82 is fixedly arranged in the shell 81, the expansion rod 83 is arranged in the sliding seat 82 in a sliding manner along the vertical direction, the return spring 84 is arranged between the sliding seat 82 and the expansion rod 83, the upper sealing block 85 is fixedly arranged at the upper end of the expansion rod 83, and the lower sealing block 86 is fixedly arranged at the lower end of the expansion rod 83; the return spring 84 can force the expansion link 83 to slide upwards, and the upper sealing block 85 blocks the air outlet hole 811, and at the moment, the air tap 8 is in a closed state; when the air tap 8 is in a closed state, the peripheral side of the lower sealing block 86 is tightly attached to the inner wall of the shell 81, and the lower end of the lower sealing block 86 is flush with the lower end of the shell 81; when the air pressure in the cooling air duct 73 increases, the air pressure difference can overcome the elastic force of the return spring 84, so that the telescopic rod 83 slides downwards, the upper sealing block 85 moves downwards and opens the air outlet 811, and simultaneously the lower sealing block 86 moves downwards so that the lower end of the shell 81 is opened, and the air faucet 8 is in an open state. The upper ends of the upper sealing block 85 and the lower sealing block 86 are both in a truncated cone-shaped structure which is inclined from top to bottom from inside to outside; when the air tap 8 is in a closed state, the upper end of the upper sealing block 85 is embedded into the air outlet hole 811 to realize plugging. In this embodiment, each nozzle sleeve 7 is provided with two cooling air passages 73 and two air nozzles 8. In addition, in the present embodiment, the upper sealing block 85 is preferably made of heat-resistant rubber, and other parts of the air faucet 8 are preferably made of metal.

As shown in fig. 23 and 24, in order to facilitate mounting of the air faucet 8, three slots 812 are formed at the lower end of the housing 81, and a air faucet key 9 is adapted to be inserted into the slots 812 for rotating the air faucet 8; the air faucet key 9 includes an operation table 91, three claws 92 extend outwards from the periphery of the operation table 91, the claws 92 are adapted to be inserted into the slots 812, and the air faucet key 9 is fixed on the air faucet 8 along the circumferential direction, an operation hole 93 is formed in the operation table 91, the operation hole 93 is adapted to be inserted with a rotating tool, and the axis of the housing 81 passes through the center of the operation hole 93.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. A forming die for an automobile guard plate comprises a fixed die component and a movable die component, wherein a cavity for forming the automobile guard plate is formed between the fixed die component and the movable die component; the method is characterized in that:

a first core pulling mechanism and a second core pulling mechanism which extend into the cavity are arranged in the fixed die component, the first core pulling mechanism is suitable for forming the installation cavity, and the second core pulling mechanism is suitable for forming the upper clamping seat; the fixed die component comprises a first fixed die plate and a second fixed die plate, and a floating assembly is arranged between the first fixed die plate and the second fixed die plate; the floating assembly is suitable for driving the first fixed die plate and the second fixed die plate to float relatively, so that the first core pulling mechanism is driven to obliquely pull the core outwards along the opening direction of the mounting cavity, and the second core pulling mechanism is driven to obliquely pull the core upwards along the opening direction of the upper clamping seat;

a hot runner system is arranged in the fixed die part, the hot runner system comprises a hot nozzle extending downwards to the die cavity, a nozzle sleeve sleeved outside the hot nozzle is further arranged in the fixed die part, the upper end of the nozzle sleeve is fixedly arranged in the second fixed die plate, a slideway penetrating through the first fixed die plate to the die cavity is formed in the first fixed die plate along the vertical direction, and the nozzle sleeve is suitable for penetrating through the slideway; the lower end of the nozzle sleeve is provided with a butt joint, the lower end of the slideway is provided with a butt joint cavity, the lower end of the hot nozzle is tightly attached to the inner wall of the butt joint, and when the forming die is closed, the outer wall of the butt joint is tightly attached to the inner wall of the butt joint cavity;

the movable mould part comprises a movable mould plate, a butt joint seat is arranged on the movable mould plate and is positioned below the nozzle sleeve, a abdicating groove is formed in the inner side of the butt joint seat, and an injection molding channel communicated with the cavity and the abdicating groove is further formed in the movable mould plate; when the forming die is closed, the lower end of the butt joint is tightly attached to the butt joint seat, and the hot nozzle is positioned in the abdicating groove;

a cooling water channel is formed in the nozzle sleeve, and a water inlet and a water outlet of the cooling water channel are respectively communicated with the second fixed template and are connected into a water circulation system;

2. The forming die for the automobile guard plate as claimed in claim 1, wherein: the first core pulling mechanism comprises a first sliding block and a first guide block, a first sliding groove penetrating from the outer side to the cavity is formed in the first fixed die plate, the first sliding block is arranged in the first sliding groove in a sliding mode, a first mold core is arranged on the inner side of the first sliding block and is suitable for penetrating through the first sliding groove and entering the cavity, the first mold core is used for forming the installation cavity, the upper end of the first guide block penetrates through the first fixed die plate and is fixedly arranged on the second fixed die plate, an inclined guide block extends out of the lower end of the first guide block, the inclined guide block inclines from top to bottom from inside to outside, and the first sliding block is arranged on the inclined guide block in a sliding mode; when the second fixed die plate floats upwards, the first guide block is driven to slide upwards, and then the first sliding block is driven to slide outwards in an inclined mode to achieve core pulling.

3. The forming die for the automobile fender according to claim 2, characterized in that: a positioning block also extends from the lower end of the inclined guide block, a positioning groove is formed below the first sliding groove, a first contact surface inclined from top to bottom from outside to inside is arranged on the outer side of the positioning block, and a second contact surface parallel to the first contact surface is arranged on the outer side of the positioning groove; when the forming mold is closed, the positioning block penetrates through the first sliding block and enters the positioning groove, the first contact surface abuts against the second contact surface, the outward movement trend of the first guide block and the first sliding block is limited, and the first mold core and the mold cavity are forced to be tightly attached.

4. The forming die for the automobile guard plate as claimed in claim 1, wherein: the second core pulling mechanism comprises a second sliding block, a second guide block and a third guide block, a second sliding groove penetrating from the upper side to the cavity is formed in the first fixed die plate, the second guide block is fixedly arranged on the first fixed die plate and located on two sides of the second sliding groove, the third guide block is fixedly arranged on the second fixed die plate, a second mold core is arranged at the lower end of the second sliding block and is suitable for penetrating through the second sliding groove and entering the cavity, and the second mold core is used for forming the upper clamping seat; the two sides of the second sliding block are arranged on the second guide block in a sliding mode, the upper end of the second sliding block is arranged on the third guide block in a sliding mode, the sliding track of the second sliding block on the second guide block is inclined from top to bottom from inside to outside, and the sliding track of the second sliding block on the third guide block is inclined from top to bottom from outside to inside; and when the second fixed die plate floats upwards, the third guide block is driven to slide upwards, and the second slide block is driven to slide upwards in an inclined mode under the common guide limiting action of the second guide block and the third guide block to realize core pulling.

5. The forming die for the automobile fender according to claim 4, characterized in that: the T-shaped sliding block is arranged at the upper end of the second sliding block, the T-shaped sliding groove which is inclined from top to bottom from outside to inside is formed in the lower end of the third guide block, and the T-shaped sliding block is suitable for being arranged in the T-shaped sliding groove in a sliding mode.

6. The forming die for the automobile guard plate as claimed in claim 1, wherein: the outer wall of the butt joint and the inner wall of the butt joint cavity correspondingly present a circular truncated cone-shaped structure inclined from top to bottom from outside to inside, and a compensation gap is formed between the nozzle sleeve and the slide way in the up-down direction.

7. The molding die for an automobile fender according to any one of claims 1 to 6, wherein: the air faucet comprises a shell and a core bar assembly, a threaded hole is formed in an outlet of the cooling air passage, the shell is of a cylindrical structure with external threads, the shell is suitable for being in threaded connection with the threaded hole in the vertical direction, a sealing ring is arranged between the upper end of the shell and the butt joint, and the lower end of the shell is flush with the lower end of the butt joint;

8. The forming die for the automobile fender according to claim 7, characterized in that: the core bar assembly comprises a sliding seat, a telescopic rod, a reset spring, an upper sealing block and a lower sealing block, the sliding seat is fixedly arranged in the shell, the telescopic rod is arranged in the sliding seat in a sliding mode along the vertical direction, the reset spring is arranged between the sliding seat and the telescopic rod, the upper sealing block is fixedly arranged at the upper end of the telescopic rod, and the lower sealing block is fixedly arranged at the lower end of the telescopic rod;

9. The forming die for the automobile fender according to claim 8, characterized in that: the upper ends of the upper sealing block and the lower sealing block are of truncated cone-shaped structures which are inclined from top to bottom from inside to outside; when the air tap is in a closed state, the upper end of the upper sealing block is embedded into the air outlet to realize plugging.

10. The forming die for the automobile fender according to claim 9, characterized in that: the lower end of the shell is provided with a plurality of clamping grooves, and an air faucet key is suitable to be inserted into the clamping grooves and used for rotating the air faucet; the air faucet key comprises an operating platform, wherein a plurality of clamping jaws extend outwards from the periphery of the operating platform, the clamping jaws are suitable for being inserted into the clamping grooves, the air faucet key is fixed on the air faucet along the circumferential direction, an operating hole is formed in the operating platform and suitable for being inserted into a rotating tool, and the axis of the shell penetrates through the center of the operating hole.