CN214926709U - Interior ejection subassembly - Google Patents

Abstract

The application discloses an inner ejection assembly, the inner ejection assembly is arranged in a forming sliding block in a sliding mode along the front-back direction, the front end of the inner ejection assembly is suitable for penetrating the forming sliding block forwards and forming a mounting hole column, and the rear end of the inner ejection assembly is suitable for penetrating the forming sliding block backwards and abutting against a movable template; interior ejection subassembly includes ejector pin, sill bar and reset spring, the ejector pin with the sill bar is along fore-and-aft direction fixed connection, the ejector pin passes forward the shaping slider is suitable for the shaping the mounting hole post, the sill bar passes backward the shaping slider is suitable for the spacing face of contradicting, reset spring cover is located on the ejector pin and be located the sill bar with between the shaping slider, reset spring can force interior ejection subassembly slides backward. The automatic demoulding device has the advantages of simple structure, reliable action, capability of avoiding die sticking and effective demoulding.

Description

Interior ejection subassembly

Technical Field

The application relates to the field of injection molds, in particular to a demolding mechanism.

Background

As shown in fig. 1 and 2, the central tunnel plastic part (100) of the automobile is provided, the front side of the central tunnel plastic part (100) is provided with a fixing plate (101) connected with a frame, the fixing plate (101) is provided with reinforcing ribs (102) arranged in a grid shape, and the fixing plate (101) is further provided with mounting hole columns (103) extending forwards. The central channel plastic part (100) is formed by injection molding, and a side core-pulling mechanism is generally adopted at the position of the fixed plate (101) for demolding; the arrangement of the reinforcing ribs (102) and the mounting hole columns (103) greatly increases the contact area of the fixed plate (101) and the side core-pulling mechanism, so that the adhesive force between the fixed plate (101) and the die is increased; especially, the mounting hole column (103) has larger depth, so that a core is required to extend into the forming process, and larger adhesive film force is required. If the side core-pulling mechanism forcibly carries out the demoulding in one step, the conditions of sticking a film, poor demoulding, product deformation and the like are easily caused.

Therefore, the improvement of the demolding structure and demolding manner of the central channel plastic part to overcome the above problems is a problem to be solved by those skilled in the art.

Disclosure of Invention

An object of this application is to provide a can solve the sticking problem, shaping high quality, injection mold's that machining efficiency is high composite drive demoulding mechanism.

Another object of the present application is to provide an inner ejection assembly that is simple in structure, reliable in operation, and capable of avoiding mold sticking and effectively performing mold release.

It is a further object of the present application to provide a drive assembly having a compound drive function, which is simple in construction and reliable in operation.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the utility model provides an injection mold's compound drive demoulding mechanism which characterized in that: comprises a forming slide block, a driving component, an inner ejection component and a movable template.

The forming slide block is arranged in a sliding mode in the front-back direction, and the front end of the forming slide block is suitable for forming the fixing plate.

The driving assembly is suitable for driving the forming sliding block to slide backwards step by step for one time and slide for the second time.

The inner ejection assembly is arranged in the forming sliding block in a sliding mode along the front-back direction, the front end of the inner ejection assembly is suitable for penetrating the forming sliding block forwards and is suitable for forming the mounting hole column, and the rear end of the inner ejection assembly is suitable for penetrating the forming sliding block backwards and is suitable for abutting against the movable template.

The movable mould plate is suitable for moving in the vertical direction to realize opening and closing of the mould, the front end of the movable mould plate is provided with a limiting surface, the limiting surface is perpendicular to the front-back direction, and the rear end of the internal ejection assembly abuts against the limiting surface.

When the movable template moves upwards to start die opening, the driving assembly drives the forming sliding block to slide backwards for one time, the front end of the forming sliding block is separated from the fixed plate to realize one-time demoulding, and meanwhile, the limiting surface always pushes against the inner ejection assembly and limits the inner ejection assembly to slide backwards; the movable template continues to move upwards, the rear end of the inner ejection assembly is separated from the limiting surface, the driving assembly continues to drive the forming sliding block to slide backwards for the second time, and the front end of the inner ejection assembly is separated from the mounting hole column to achieve secondary demolding.

Preferably, the inner ejection assembly comprises an ejector rod, a bottom rod and a reset spring, the ejector rod is fixedly connected with the bottom rod along the front-back direction, the ejector rod forwards penetrates through the forming sliding block and is suitable for forming the mounting hole column, the bottom rod backwards penetrates through the forming sliding block and is suitable for abutting against the limiting surface, the reset spring is sleeved on the ejector rod and is located between the bottom rod and the forming sliding block, and the reset spring can force the inner ejection assembly to slide backwards. The top rod and the bottom rod are arranged in a segmented mode, so that the installation and the maintenance are convenient, and the installation of the rotating rod is facilitated.

As an improvement, the inner ejection assembly further comprises a rotating rod, and a sliding groove is formed in the limiting surface; the top rod is rotatably connected with the bottom rod, the rotating rod is rotatably arranged in the bottom rod, the front end of the rotating rod forwards penetrates through the bottom rod and is concentrically and fixedly connected with the top rod, the rear end of the rotating rod backwards penetrates through the bottom rod and abuts against the limiting surface, the rear end of the rotating rod is further eccentrically provided with a sliding column, and the sliding column is suitable for being movably arranged in the sliding chute; when the movable template moves up and down, the sliding column can move in the sliding groove, and then the rotating rod and the ejector rod are driven to rotate; and the sliding column can go in and out of the sliding groove along the up-down direction. The matching essence of the rotating rod and the limiting surface belongs to a crank sliding block structure, and the linear displacement of the movable template is converted into the rotation of the rotating rod to realize linkage.

Preferably, the sliding chute comprises a driving section and an exit section, the driving section is a straight line section which is obliquely arranged, the exit section is a straight line section which is arranged along the vertical direction, the lower end of the driving section is smoothly connected with the upper end of the exit section, the lower end of the exit section is provided with an opening, and an included angle alpha between the driving section and the exit section is larger than 90 degrees. The linear section has simple parameter design and convenient processing, and is suitable for being used as a driving section and a withdrawing section; and the included angle alpha is larger than 90 degrees, so that the clamping stagnation of the sliding column when the sliding column enters the exit section from the driving section or enters the driving section from the exit section can be avoided, and the reliability and the stability of linkage are ensured.

The working principle is as follows: when the movable template moves upwards and starts to open the mold, the sliding column moves downwards along the driving section from the initial position in an inclined mode, and then the rotating rod and the ejector rod are driven to rotate; the movable template continues to move upwards, the sliding column enters the exit section from the driving section, the sliding column slides downwards along the exit section until the inner ejection assembly is separated from the limiting surface, and the sliding column exits from the sliding chute; when the movable mould plate moves downwards to carry out mould closing, the sliding column enters from the lower end of the withdrawing section, slides upwards along the withdrawing section, and moves upwards along the driving section in an inclined mode until the sliding column is reset to the initial position.

Preferably, the sliding chute further comprises a guide section, the guide section is of a horn-shaped structure with a downward opening, the upper end of the guide section is smoothly connected with the lower end of the exit section, and the opening range of the lower end of the guide section is larger than the moving range of the sliding column; when the movable template moves downwards to carry out die assembly, the sliding column enters the exit section from the guide section in a guiding mode. When the sliding column is separated from the sliding groove, the rotating rod can rotate under the action of gravity or vibration, so that the sliding column cannot accurately enter the sliding groove during mold closing; and the arrangement of the guide section ensures that the sliding column can smoothly enter the sliding groove when the die is closed no matter where the rotating rod is located.

Preferably, when the sliding column moves in the driving section, the rotating angle of the rotating rod and the ejector rod is not more than 90 degrees. Due to the arrangement of the rotating angle, on one hand, the ejector rod can be smoothly demoulded only by rotating by a small angle, and if the ejector rod rotates by too large angle, the mounting hole column is abraded, so that the forming quality is influenced; on the other hand, the rotation angle does not exceed 90 degrees, so that the sliding column can be completely prevented from passing through a dead point, and the linkage reliability is ensured.

Preferably, T type groove has been seted up to the sill bar front end, the ejector pin rear end is provided with the connection pad, the connection pad card is located T type inslot, the sill bar with the ejector pin passes through the connection pad with the cooperation in T type groove realizes connecting with rotating along the spacing of fore-and-aft direction. The structure has the advantages of simplicity, reliability, convenience in installation and stability in movement.

Preferably, a reset tangent plane is arranged above the rear end of the bottom rod, when the movable template moves downwards to perform die assembly, the lower end of the movable template is suitable for abutting against the reset tangent plane and driving the inner ejection assembly to slide forwards until the rear end of the bottom rod abuts against the limiting plane to complete die assembly. The structure can ensure that the die assembly is in place, and avoid interference or clamping stagnation.

Preferably, the lower end of the forming slide block extends backwards to form a linkage plate, the driving assembly comprises an inclined guide post and a time-delay driving piece, the upper end of the inclined guide post is fixedly arranged on the movable template, the lower end of the inclined guide post is arranged on the linkage plate in a sliding manner, the inclined guide post is inclined from front to back from top to bottom, and when the movable template moves upwards and starts to open the mold, the driving assembly drives the forming slide block to slide backwards for one time through the cooperation of the inclined guide post and the linkage plate; the time-delay driving piece is suitable for linking the linkage plate, and when the inclined guide post is separated from the linkage plate, the time-delay driving piece can drive the forming slide block to slide backwards for the second time. The structure can simply and reliably realize that the driving component drives the forming slide block to slide backwards for one time and for the second time step by step.

As an implementation mode, the delay driving member is an oil cylinder, a pull groove is formed in the rear of the linkage plate, a pull block is fixedly arranged on the oil cylinder, the pull block is slidably arranged in the pull groove, and the oil cylinder can drive the forming slide block to slide along the front-back direction through the matching of the pull block and the pull groove; when the movable die plate is in a die closing state, a first delay gap is formed between the pull block and the pull groove, when the movable die plate moves upwards and starts to open the die, the first delay gap is gradually reduced, and the oil cylinder drives the forming slide block to slide backwards for the second time after the inclined guide pillar is separated from the linkage plate.

The pull groove and the pull block are of an I-shaped structure matched with each other, the I-shaped structure can realize that the pull groove and the pull block relatively slide along the front-back direction to form the first delay gap, and the I-shaped structure can also realize that the pull groove and the pull block are locked along the front-back direction to enable the oil cylinder to pull the forming sliding block to slide. The structure is simple and reliable, and the installation is convenient.

As another embodiment, the delay driving member is a bent pin, the linkage plate is provided with a guide groove, the upper end of the bent pin is fixedly arranged on the movable template, the lower end of the bent pin penetrates through the guide groove, the bent pin comprises a straight section and an inclined section which are smoothly connected, the straight section is arranged along the up-down direction, and the inclined section is inclined from front to back from top to bottom; when the movable template is in a die closing state, a second delay gap is formed between the bent pin and the guide groove, when the movable template moves upwards to start die opening, the second delay gap is gradually reduced, at the moment, the straight section moves in the guide groove, until the inclined guide post is separated from the linkage plate, the inclined guide section enters the guide groove and abuts against the linkage plate, the movable template continues to move upwards, and the driving assembly drives the forming slide block to slide backwards for the second time through the matching of the inclined guide section and the linkage plate.

As an improvement, the compound driving demolding mechanism of the injection mold further comprises an auxiliary ejection assembly, the front end of the movable template is further provided with an auxiliary limiting surface, and the auxiliary limiting surface is perpendicular to the front-back direction; the auxiliary ejection assembly comprises an auxiliary ejector rod, an auxiliary bottom rod and an auxiliary reset spring, the auxiliary ejector rod is fixedly connected with the auxiliary bottom rod in the front-back direction, the auxiliary ejector rod forwards penetrates through the forming sliding block and can be embedded into the front end face of the forming sliding block, the auxiliary bottom rod backwards penetrates through the forming sliding block and is suitable for being abutted against the auxiliary limiting face, the auxiliary reset spring is sleeved on the auxiliary ejector rod and is located between the auxiliary bottom rod and the forming sliding block, and the auxiliary reset spring can force the auxiliary ejection assembly to slide backwards. The auxiliary ejection assembly is similar to the inner ejection assembly in structure and the principle is the same, on one hand, the auxiliary ejection assembly can be used for assisting the inner ejection assembly to eject when the forming slide block slides once, the ejection area is increased, local deformation or local mucosa is avoided for the fixed plate, the demoulding of the forming slide block is smoother, on the other hand, the acting point of the fixed plate is increased after the demoulding of the forming slide block, the fixed plate is prevented from shaking or deforming, and the demoulding of the inner ejection assembly is smoother when the forming slide block slides twice.

As an improvement, injection mold's combined drive demoulding mechanism still includes the water-cooling jacket, the water-cooling jacket cover is located interior ejecting subassembly is last and can follow interior ejecting subassembly slides along the fore-and-aft direction, cooling channel has been seted up in the shaping slider, the basin has been seted up in water-cooling jacket middle section, when the water-cooling jacket slides around the cooling channel communicates all the time the basin crosses, both sides are provided with the seal groove respectively around the basin, the seal groove is suitable for the installation sealing washer, is used for realizing the sealed of crossing the basin. Because the depth of the mounting hole column is larger, more molten plastic is needed to be melted and thicker at the mounting hole column during molding, and longer cooling time is needed; therefore, the water cooling sleeve is arranged on the inner ejection assembly, the cooling speed of the molten plastic at the mounting hole column is increased, and the forming efficiency is improved. It is worth mentioning that the sliding arrangement of the inner ejection assembly is matched with the water cooling jacket and the cooling channel in the scheme.

Compared with the prior art, the beneficial effect of this application lies in:

(1) in the mold opening process, demolding is carried out in two steps in the same core pulling direction (namely primary demolding of the molding slide block and secondary demolding of the inner ejection assembly), the adhesive force during each demolding is reduced, and the conditions of adhesive film, poor demolding, product deformation and the like are avoided.

(2) On the basis of substep drawing of patterns, this scheme has still set up the bull stick in the ejecting subassembly, utilizes the cooperation of traveller and spout for the linear displacement of movable mould board changes the rotation of bull stick and ejector pin, and at a drawing of patterns in-process, the rotation of ejector pin can make ejector pin and mounting hole post take place to break away from in the circumferencial direction, has greatly reduced the mucous membrane power when the secondary drawing of patterns, has further reduced the possibility that the mucous membrane phenomenon takes place, has improved shaping quality.

(3) In order to realize step demoulding, the forming slide block needs to perform primary sliding and secondary sliding step by step, and a larger movement stroke is needed. Therefore, the driving assembly with the composite driving function is adopted in the scheme, and the forming sliding block is compositely driven by two steps: the forming slide block moves backwards in one sliding way and is driven by the inclined guide post, and the forming slide block moves backwards in a second sliding way and is driven by a delay driving piece (an oil cylinder or a bent pin).

Drawings

FIG. 1 is a perspective view of a center channel molding formed in accordance with a preferred embodiment of the present application.

FIG. 2 is an enlarged view at A of FIG. 1 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 preferred embodiment according to the present application.

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

FIG. 6 is a cross-sectional view taken along the direction C-C of FIG. 4, in accordance with a preferred embodiment of the present application.

FIG. 7 is a perspective view of a removable mold plate and a forming shoe shown hidden in place according to a preferred embodiment of the present application.

Fig. 8 is a perspective view of a movable die plate hidden according to a preferred embodiment of the present application.

Fig. 9 is a perspective view of an internal ejection assembly in accordance with a preferred embodiment of the present application.

FIG. 10 is a half sectional view of an internal ejection assembly in accordance with a preferred embodiment of the present application.

Fig. 11 is an exploded view of an internal ejection assembly in accordance with a preferred embodiment of the present application.

Fig. 12 to 14 are schematic views illustrating a state change of the rotary bar and the movable die plate during the mold opening process according to a preferred embodiment of the present application.

FIG. 15 is an enlarged view at D of FIG. 13 in accordance with a preferred embodiment of the present application.

FIG. 16 is a front view of a movable platen in accordance with a preferred embodiment of the present application.

FIG. 17 is an enlarged view at E of FIG. 16 in accordance with a preferred embodiment of the present application.

FIG. 18 is a perspective view of a bottom bar according to a preferred embodiment of the present application.

Fig. 19 is a perspective view of a rotating rod according to a preferred embodiment of the present application.

Fig. 20 is a perspective view of a carrier rod according to a preferred embodiment of the present application.

Fig. 21 is a perspective view of an auxiliary ejection assembly according to a preferred embodiment of the present application.

FIG. 22 is a perspective view of the arrangement of the water jacket and cooling channels in a preferred embodiment according to the present application.

FIG. 23 is a half sectional view of a water jacket and cooling channel arrangement according to a preferred embodiment of the present application.

FIG. 24 is a perspective view of a preferred embodiment of the present application with the bent pin as a time delay drive.

FIG. 25 is a half sectional view of a preferred embodiment of the bending pin as a time delay drive according to the present application.

In the figure: 100. a central channel molding; 101. a fixing plate; 102. reinforcing ribs; 103. mounting a hole column; 1. forming a sliding block; 11. a cooling channel; 12. a linkage plate; 121. groove drawing; 122. a guide groove; 2. a drive assembly; 21. an inclined guide post; 22. an oil cylinder; 23. bending a pin; 221. pulling the block; 222. a first delay gap; 231. a straight-through section; 232. an oblique guide section; 233. a second delay gap; 3. an inner ejection assembly; 31. a top rod; 32. a bottom bar; 33. a rotating rod; 34. a return spring; 311. a connecting disc; 321. a T-shaped groove; 322. resetting a tangent plane; 331. a traveler; 4. an auxiliary ejection assembly; 41. an auxiliary ejector rod; 42. an auxiliary bottom bar; 43. an auxiliary return spring; 5. a movable template; 51. a limiting surface; 52. an auxiliary limiting surface; 50. a chute; 501. a drive section; 502. an exit section; 503. a guide section; 6. water cooling jacket; 61. passing through a water tank; 62. sealing the groove.

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.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover 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 product that can be injection molded according to a preferred embodiment of the present invention is a center tunnel plastic part 100 of an automobile, a fixing plate 101 connected to a frame is disposed on the front side of the center tunnel plastic part 100, reinforcing ribs 102 arranged in a grid shape are disposed on the fixing plate 101, and a mounting hole column 103 extending forward is further disposed on the fixing plate 101.

As shown in fig. 3 to 25, a preferred embodiment of the present application includes a forming shoe 1, a driving assembly 2, an inner ejection assembly 3, an auxiliary ejection assembly 4, and a movable die plate 5.

Wherein the forming slide block 1 is arranged in a sliding way along the front and back direction, and the front end of the forming slide block 1 is suitable for forming the fixing plate 101.

The driving assembly 2 is adapted to drive the forming shoe 1 backwards in steps of a first sliding movement and a second sliding movement.

The inner ejection assembly 3 is arranged in the forming slide block 1 in a sliding mode along the front-back direction, the front end of the inner ejection assembly 3 is suitable for penetrating the forming slide block 1 forwards and is suitable for forming the mounting hole column 103, and the rear end of the inner ejection assembly 3 is suitable for penetrating the forming slide block 1 backwards and is suitable for abutting against the movable template 5.

The auxiliary ejection assembly 4 and the inner ejection assembly 3 are similar in structure and are arranged in the forming slide block 1 in a sliding mode along the front-back direction, the rear end of the auxiliary ejection assembly 4 is suitable for penetrating through the forming slide block 1 backwards and abutting against the movable template 5, and the difference is that the front end of the auxiliary ejection assembly 4 is suitable for penetrating through the forming slide block 1 forwards and being embedded into the front end face of the forming slide block 1.

The movable mould plate 5 is suitable for moving in the vertical direction to realize opening and closing of the mould, the front end of the movable mould plate 5 is provided with a limiting surface 51 and an auxiliary limiting surface 52, the limiting surface 51 and the auxiliary limiting surface 52 are both perpendicular to the front-back direction, the rear end of the inner ejection assembly 3 abuts against the limiting surface 51, and the rear end of the auxiliary ejection assembly 4 abuts against the auxiliary limiting surface 52.

In this embodiment, the movable mold plate 5 is actually a fixed mold part, and the forming slide block 1, the driving assembly 2, the inner ejection assembly 3, and the auxiliary ejection assembly 4 belong to a movable mold part.

The working principle is as follows: when the movable template 5 moves upwards and starts to open the mold, the driving assembly 2 drives the forming slide block 1 to slide backwards for one time, the front end of the forming slide block 1 is separated from the fixed plate 101 to realize one-time demolding, meanwhile, the limiting surface 51 and the auxiliary limiting surface 52 respectively and always abut against the inner ejection assembly 3 and the auxiliary ejection assembly 4, and the inner ejection assembly 3 and the auxiliary ejection assembly 4 are limited to slide backwards; the movable template 5 continues to move upwards, the rear ends of the inner ejection assembly 3 and the auxiliary ejection assembly 4 are separated from the limiting surface 51 and the auxiliary limiting surface 52 respectively, the driving assembly 2 continues to drive the forming slide block 1 to slide backwards for the second time, and the front end of the inner ejection assembly 3 is separated from the mounting hole column 103 to realize secondary demoulding.

On the basis of the step-by-step demolding structure, the optimization and improved design of the inner ejection assembly 3 are emphasized in the embodiment, and specifically: as shown in fig. 9 to 17, the inner ejection assembly 3 includes a top rod 31, a bottom rod 32, a rotating rod 33 and a return spring 34, the top rod 31 and the bottom rod 32 are fixedly connected along the front-back direction, the top rod 31 is rotatably connected to the bottom rod 32, the top rod 31 passes through the forming slide block 1 forward and is suitable for forming the mounting hole post 103, the bottom rod 32 passes through the forming slide block 1 backward and is suitable for abutting against the limiting surface 51, the return spring 34 is sleeved on the top rod 31 and is located between the bottom rod 32 and the forming slide block 1, and the return spring 34 can force the inner ejection assembly 3 to slide backward. The limiting surface 51 is provided with a sliding groove 50, the rotating rod 33 is rotatably arranged in the bottom rod 32, the front end of the rotating rod 33 forwards penetrates through the bottom rod 32 and is concentrically and fixedly connected with the top rod 31, the rear end of the rotating rod 33 backwards penetrates through the bottom rod 32 and abuts against the limiting surface 51, the rear end of the rotating rod 33 is further eccentrically provided with a sliding column 331, and the sliding column 331 is suitable for being movably arranged in the sliding groove 50; when the movable template 5 moves up and down, the sliding column 331 can move in the sliding groove 50, and then the rotating rod 33 and the ejector rod 31 are driven to rotate; and the slide post 331 can move in and out of the slide groove 50 in the up-and-down direction. The matching nature of the rotating rod 33 and the limiting surface 51 is a crank sliding block structure, and the linear displacement of the movable template 5 is converted into the rotation of the rotating rod 33 to realize linkage, so that the ejector rod 31 rotates to realize demoulding.

As shown in fig. 16 and 17, the chute 50 in this embodiment includes a driving section 501 and an exiting section 502, the driving section 501 is a straight line section arranged obliquely, the exiting section 502 is a straight line section formed along the up-down direction, the lower end of the driving section 501 is smoothly connected to the upper end of the exiting section 502, the lower end of the exiting section 502 is open, and an included angle α between the driving section 501 and the exiting section 502 is greater than 90 °. The linear section has simple parameter design and convenient processing, and is suitable for being used as a driving section 501 and an exiting section 502; the included angle alpha is larger than 90 degrees, so that clamping stagnation of the sliding column 331 when the sliding column enters the exit section 502 from the driving section 501 or the exit section 502 enters the driving section 501 can be avoided, and the reliability and stability of linkage are ensured. It should be noted that the sliding chute 50 of the present application is not limited to the above-mentioned shape, and other shapes such as circular arc, curved line, and broken line, which can achieve the above-mentioned functions, should fall into the protection scope of the present application.

As shown in fig. 16 and 17, the sliding chute 50 further includes a guiding section 503, the guiding section 503 is of a downward-opening trumpet-shaped structure, the upper end of the guiding section 503 is smoothly connected with the lower end of the withdrawing section 502, and the opening range of the lower end of the guiding section 503 is larger than the moving range of the sliding column 331; when the movable platen 5 moves downward to perform mold clamping, the spool 331 is guided from the guide section 503 into the exit section 502. When the slide column 331 is separated from the slide slot 50, the rotating rod 33 may rotate due to gravity or vibration, so that the slide column 331 cannot accurately enter the slide slot 50 during mold closing; the guide section 503 ensures that the slide post 331 can smoothly enter the slide groove 50 at the time of mold clamping regardless of the position of the rotary rod 33.

It is worth mentioning that when the sliding column 331 moves in the driving section 501, the rotation angle of the rotating rod 33 and the top rod 31 does not exceed 90 °. The rotation angle is set, on one hand, the ejector rod 31 can be smoothly demoulded only by rotating by a small angle, and if the rotation angle is too large, the mounting hole column 103 is abraded, so that the forming quality is influenced; on the other hand, the rotation angle is not more than 90 degrees, so that the sliding column 331 can be completely prevented from passing through a dead point, and the linkage reliability is ensured.

As shown in fig. 18 to 20, in order to optimize the installation manner and the linkage manner, a T-shaped groove 321 is formed in the front end of the bottom rod 32, a connection disc 311 is arranged at the rear end of the top rod 31, the connection disc 311 is clamped in the T-shaped groove 321, the bottom rod 32 and the top rod 31 are in limited and rotational connection along the front-back direction through the cooperation of the connection disc 311 and the T-shaped groove 321, a reset tangent plane 322 is formed in the rear end of the bottom rod 32, when the movable die plate 5 moves downwards to perform die assembly, the lower end of the movable die plate 5 is suitable for abutting against the reset tangent plane 322 and driving the inner ejection assembly 3 to slide forwards until the rear end of the bottom rod 32 abuts against the limiting plane 51 to complete die assembly.

As shown in fig. 12 to 15, the operating principle of the rotating lever 33 is as follows: when the movable mould plate 5 moves upwards to start mould opening, the sliding column 331 moves downwards along the driving section 501 from the initial position in an inclined way, and further drives the rotating rod 33 and the ejector rod 31 to rotate; the movable template 5 continues to move upwards, the sliding column 331 enters the exit section 502 from the driving section 501, the sliding column 331 slides downwards along the exit section 502 until the inner ejection assembly 3 is separated from the limiting surface 51, and the sliding column 331 exits from the sliding groove 50; when the movable die plate 5 moves downward to perform die assembly, the slide column 331 enters from the lower end of the exit section 502, slides upward along the exit section 502, and then moves obliquely upward along the driving section 501 until the slide column 331 returns to the initial position. Wherein fig. 12 shows a state diagram of the spool 331 when the driving section 501 is active, fig. 13 and 15 show a state diagram of the spool 331 when entering the exit section 502 from the driving section 501, and fig. 14 shows a state diagram of the spool 331 when the exit section 502 is active.

It should be noted that, when the slide post 331 moves in the slide slot 50, the slide slot 50 actually moves relative to the slide post 331, but for the sake of clarity and conformity with the daily expression logic, the slide post 331 is described as a movement perspective.

As shown in fig. 6 and fig. 21, the auxiliary ejection assembly 4 of the present embodiment includes an auxiliary top rod 41, an auxiliary bottom rod 42 and an auxiliary return spring 43, the auxiliary top rod 41 and the auxiliary bottom rod 42 are fixedly connected along the front-back direction, the auxiliary top rod 41 passes through the forming slider 1 forward and can be embedded into the front end surface of the forming slider 1, the auxiliary bottom rod 42 passes through the forming slider 1 backward and is suitable for abutting against the auxiliary limiting surface 52, the auxiliary return spring 43 is sleeved on the auxiliary top rod 41 and is located between the auxiliary bottom rod 42 and the forming slider 1, and the auxiliary return spring 43 can force the auxiliary ejection assembly 4 to slide backward. It is worth mentioning that the auxiliary push rod 41 can be arranged below the reinforcing rib 102 for "holding" the fixing plate 101.

As shown in fig. 22 and 23, in order to increase the cooling speed at the mounting hole column 103, the water cooling jacket 6 is further provided in the present embodiment, the water cooling jacket 6 is sleeved on the inner ejection assembly 3 and can slide along the front-rear direction along with the inner ejection assembly 3, the forming slider 1 is provided with the cooling channel 11 therein, the water passing groove 61 is provided at the middle section of the water cooling jacket 6, the cooling channel 11 always passes through the water passing groove 61 when the water cooling jacket 6 slides front-rear, the front side and the rear side of the water passing groove 61 are respectively provided with the sealing groove 62, and the sealing groove 62 is suitable for mounting the sealing ring, so as to realize the sealing of the water passing groove 61.

The lower end of the forming slide block 1 extends backwards to form a linkage plate 12, the driving assembly 2 comprises an inclined guide post 21 and a delayed driving piece, the upper end of the inclined guide post 21 is fixedly arranged on the movable template 5, the lower end of the inclined guide post 21 is arranged on the linkage plate 12 in a sliding mode, the inclined guide post 21 is inclined from front to back from top to bottom, and when the movable template 5 moves upwards and starts to open the mold, the driving assembly 2 drives the forming slide block 1 to slide backwards for one time through the cooperation of the inclined guide post 21 and the linkage plate 12; the time-delay driving piece is suitable for linking the linkage plate 12, and when the inclined guide post 21 is separated from the linkage plate 12, the time-delay driving piece can drive the forming slide block 1 to slide backwards for the second time. The present embodiment provides two configurations of the time delay driving member, respectively as follows.

As shown in fig. 5 to 8, as an embodiment, the delay driving member is an oil cylinder 22, a pull groove 121 is formed in the rear of the linkage plate 12, a pull block 221 is fixedly arranged on the oil cylinder 22, the pull block 221 is slidably arranged in the pull groove 121, and the oil cylinder 22 can drive the forming slider 1 to slide along the front-back direction through the matching of the pull block 221 and the pull groove 121; when the movable die plate 5 is in a die closing state, a first delay gap 222 is formed between the pull block 221 and the pull groove 121, and when the movable die plate 5 moves upwards to start die opening, the first delay gap 222 is gradually reduced until the inclined guide post 21 is separated from the linkage plate 12, and the oil cylinder 22 drives the forming slide block 1 to slide backwards for the second time. The driving of the oil cylinder 22 has the advantages of accurate control and stable operation, and has the disadvantages of larger volume and higher cost.

In this embodiment, the pull groove 121 and the pull block 221 are in an i-shaped structure, the i-shaped structure can realize that the pull groove 121 and the pull block 221 relatively slide along the front-back direction to form a first delay gap 222, and the i-shaped structure can also realize that the pull groove 121 and the pull block 221 are locked along the front-back direction to enable the oil cylinder 22 to pull the forming slide block 1 to slide.

As shown in fig. 24 and 25, as another embodiment, the delayed driving member is a bent pin 23, the linkage plate 12 is provided with a guide groove 122, the upper end of the bent pin 23 is fixedly disposed on the movable mold plate 5, the lower end of the bent pin 23 passes through the guide groove 122, the bent pin 23 includes a straight section 231 and an inclined guide section 232 which are smoothly connected, the straight section 231 is disposed along the up-down direction, and the inclined guide section 232 is inclined from the top to the bottom from the front to the back; when the movable template 5 is in a mold closing state, a second delay gap 233 is formed between the bent pin 23 and the guide groove 122, when the movable template 5 moves upwards to start mold opening, the second delay gap 233 is gradually reduced, and at the moment, the straight section 231 moves in the guide groove 122 until the inclined guide post 21 is separated from the linkage plate 12, the inclined guide section 232 enters the guide groove 122 and abuts against the linkage plate 12, the movable template 5 continues to move upwards, and the driving assembly 2 drives the forming slider 1 to slide backwards for the second time through the matching of the inclined guide section 232 and the linkage plate 12. The bent pin 23 has the advantages of simple and compact structure and low cost, and has the disadvantages of high requirements on machining and assembling precision and short service life.

The application provides two kinds of structures that can realize compound drive's time delay driving piece, can combine advantage and disadvantage between them, selects according to actual demand. However, the present application does not exclude other configurations of the delay drive which enable a compound drive.

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 (7)

1. An inner ejection assembly, comprising: the inner ejection assembly is arranged in the forming sliding block in a sliding mode along the front-back direction, the front end of the inner ejection assembly is suitable for penetrating the forming sliding block forwards and forming the mounting hole column, and the rear end of the inner ejection assembly is suitable for penetrating the forming sliding block backwards and abutting against the movable template;

interior ejection subassembly includes ejector pin, sill bar and reset spring, the ejector pin with the sill bar is along fore-and-aft direction fixed connection, the ejector pin passes forward the shaping slider is suitable for the shaping the mounting hole post, the sill bar passes backward the shaping slider is suitable for the spacing face of contradicting, reset spring cover is located on the ejector pin and be located the sill bar with between the shaping slider, reset spring can force interior ejection subassembly slides backward.

2. An internal ejection assembly as in claim 1, wherein: the inner ejection assembly further comprises a rotating rod, and a sliding groove is formed in the limiting surface; the top rod is rotatably connected with the bottom rod, the rotating rod is rotatably arranged in the bottom rod, the front end of the rotating rod forwards penetrates through the bottom rod and is concentrically and fixedly connected with the top rod, the rear end of the rotating rod backwards penetrates through the bottom rod and abuts against the limiting surface, the rear end of the rotating rod is further eccentrically provided with a sliding column, and the sliding column is suitable for being movably arranged in the sliding chute;

when the movable template moves up and down, the sliding column can move in the sliding groove, and then the rotating rod and the ejector rod are driven to rotate; and the sliding column can go in and out of the sliding groove along the up-down direction.

3. An internal ejection assembly as in claim 2, wherein: the sliding chute comprises a driving section and an exit section, the driving section is a straight line section which is obliquely arranged, the exit section is a straight line section which is arranged along the up-down direction, the lower end of the driving section is smoothly connected with the upper end of the exit section, the lower end of the exit section is provided with an opening, and the included angle alpha between the driving section and the exit section is larger than 90 degrees;

when the movable template moves upwards and starts to open the mold, the sliding column moves downwards along the driving section from the initial position in an inclined mode, and then the rotating rod and the ejector rod are driven to rotate; the movable template continues to move upwards, the sliding column enters the exit section from the driving section, the sliding column slides downwards along the exit section until the inner ejection assembly is separated from the limiting surface, and the sliding column exits from the sliding chute; when the movable mould plate moves downwards to carry out mould closing, the sliding column enters from the lower end of the withdrawing section, slides upwards along the withdrawing section, and moves upwards along the driving section in an inclined mode until the sliding column is reset to the initial position.

4. An internal ejection assembly as in claim 3, wherein: the sliding chute also comprises a guide section, the guide section is of a horn-shaped structure with a downward opening, the upper end of the guide section is smoothly connected with the lower end of the exit section, and the opening range of the lower end of the guide section is larger than the moving range of the sliding column; when the movable template moves downwards to carry out die assembly, the sliding column enters the exit section from the guide section in a guiding mode.

5. An internal ejection assembly as in claim 3, wherein: when the sliding column moves in the driving section, the rotating angle of the rotating rod and the ejector rod is not more than 90 degrees.

6. An internal ejection assembly as in claim 3, wherein: t type groove has been seted up to the sill bar front end, the ejector pin rear end is provided with the connection pad, the connection pad card is located T type inslot, the sill bar with the ejector pin passes through the connection pad with the cooperation in T type groove realizes connecting with rotating along the spacing of fore-and-aft direction.

7. An internal ejection assembly as in claim 3, wherein: and when the movable template moves downwards to carry out die assembly, the lower end of the movable template is suitable for abutting against the reset section and driving the inner ejection assembly to slide forwards until the rear end of the bottom rod abuts against the limiting surface to complete die assembly.

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