CN216968523U - A back-off demoulding structure for car back shroud - Google Patents

Abstract

The application discloses back-off demoulding structure for car back shroud, including the design core, first back-off core, second back-off core and demoulding mechanism, slidable mounting has the movable core on the design core, first back-off core and second back-off core all incline to set up in the movable core, demoulding mechanism installs in the movable core and cooperates with first back-off core, liftout mechanism orders about respectively that the movable core vertically shifts up and the second back-off core inclines to shift up, the in-process demoulding mechanism drive first back-off core that shifts up at the movable core carries out the slope for moving the core and moves down. The beneficial effect of this application: through the material ejecting process that shifts up of liftout mechanism, can drive the slope of first back-off core respectively and move down and the slope of second back-off core shifts up to realize the drawing of patterns of first back-off and second back-off, thereby can the subsequent drawing of patterns degree of difficulty of forcing of effectual reduction.

Description

A back-off demoulding structure for car back shroud

Technical Field

The application relates to the field of injection molds, in particular to an injection mold for an automobile rear cover plate.

Background

A conventional rear cover (100) of an automobile is shown in fig. 1 and 2, in which a pair of symmetrical air outlets are disposed in the middle of the rear cover, a first reverse buckle (110) is disposed on the inner side of the circumference of the air outlet, and a second reverse buckle (120) is disposed on one side edge of the rear cover (100). The first reverse buckle (110) and the second reverse buckle (120) are used for connecting the rear cover plate (100) so as to ensure the stability when the rear cover plate is connected. Meanwhile, a first connecting buckle (130) and a second connecting buckle (140) which are slender are fixedly arranged on the inner side wall, close to the air outlet, of the rear cover plate (100), and the first connecting buckle (130) and the second connecting buckle (140) are used for positioning and supporting when the rear cover plate (100) is installed.

When the injection mold in the prior art performs demolding on the rear cover plate (100), the first reverse buckle (110) and the second reverse buckle (120) can increase the difficulty of demolding, and meanwhile, the demolding of the first connecting buckle (130) and the second connecting buckle (140) is basically forced demolding, so that the first connecting buckle (130) and the second connecting buckle (140) are easily broken or damaged due to overlarge demolding force, and the product quality of the rear cover plate (100) is affected. Therefore, an injection mold which can conveniently demold the rear cover plate (100) is urgently needed.

SUMMERY OF THE UTILITY MODEL

One of them aim at of this application provides an injection mold for car back shroud, can effectual drawing of patterns degree of difficulty and the shaping quality that reduces the back shroud.

One of them aim at of this application provides a back-off demoulding structure for car back shroud, can effectual back shroud's back shroud the back-off demoulding degree of difficulty that reduces.

One of them aim at of this application provides a connector link shaping subassembly for automobile rear cover plate, can effectual improvement connector link's shaping quality.

In order to achieve at least one of the above purposes, the technical solution adopted by the present application is: an injection mold for an automobile rear cover plate comprises a fixed mold core, a movable mold core, a material ejecting mechanism and a demolding mechanism, wherein the fixed mold core is fixedly installed on a fixed mold, the movable mold core is installed on the fixed mold core in a sliding mode, meanwhile, a connecting buckle forming assembly is vertically installed on the movable mold core in a sliding mode, a first inverted buckle mold core is installed on the movable mold core in an inclined sliding mode, the connecting buckle forming assembly is matched with the movable mold core to form a first connecting buckle and a second connecting buckle, and the first inverted buckle mold core is matched with the movable mold core to form a first inverted buckle; the demolding mechanism is arranged on the movable mold core and is suitable for being matched with the connecting buckle molding assembly and the first inverted mold core; the material ejecting mechanism is connected with the movable mold core and is suitable for driving the movable mold core to vertically slide along the fixed mold core, so that the primary demolding of the molded rear cover plate is realized; and simultaneously, in the process of sliding the movable mold core, the demolding mechanism is suitable for driving the connecting buckle forming assembly to vertically slide reversely and driving the first inverted buckle mold core to incline and slide reversely, so that the first connecting buckle and the second connecting buckle on the molded rear cover plate can be subjected to semi-demolding, and the first inverted buckle on the molded rear cover plate can be subjected to demolding, so that the demolding is convenient, and the product quality after demolding can be improved.

Preferably, the demolding mechanism comprises a rotating shaft and a driving plate; the rotating shaft is rotatably and obliquely arranged on the movable mold core, and the upper end of the rotating shaft is in threaded connection with the first back-off mold core; the driving plate is slidably arranged in a communication groove arranged in the movable core, the driving plate is matched with the bottom of the connecting buckle forming component, the driving board is connected with the middle part of the rotating shaft through a deflection structure, the lower end of the rotating shaft extends into the shaping core and is matched with a matching part arranged on the shaping core through a connected transmission part, so that when the movable core is driven by the material ejecting mechanism to move vertically upwards, the rotating shaft is suitable for rotating through the matching of the transmission part and the matching part in the process of synchronously moving upwards along with the movable core, so as to drive the first inverted core to move obliquely downwards relative to the movable core through threaded connection, and driving the driving plate to drive the connecting buckle forming assembly to vertically move relative to the movable mold core through the deflection structure.

Preferably, a sliding cavity is formed in the fixed core, the matching portion is arranged in the sliding cavity, and the rotating shaft is located in the sliding cavity and matched with the matching portion through the transmission portion all the time in the process of moving the movable core upwards and demoulding.

Preferably, the matching part is a rack segment which is vertically arranged; the lower end of the rotating shaft is provided with a first bevel gear; the transmission part comprises a transmission shaft, and a second bevel gear and a gear which are arranged at two ends of the transmission shaft, the transmission shaft is horizontally arranged and is connected with the rotating shaft through a connecting seat, so that the first bevel gear and the second bevel gear are meshed, and meanwhile, the gear is meshed with the rack section; the two sides of the connecting seat are in sliding fit with the side wall of the sliding cavity, so that when the movable mold core moves upwards and is demolded, the transmission part is suitable for driving the rotating shaft to rotate through the meshing of the gears along the rack segments.

Preferably, the driving plate is perpendicular to the axis of the rotating shaft, a through hole is formed in the middle of the driving plate, and the driving plate is suitable for being matched with the rotating shaft through the through hole; the deflection structure comprises a convex block and a driving groove, the convex block is fixedly arranged on the side wall of the rotating shaft, the driving groove is arranged on the side wall of the through hole, the driving groove is horizontally arranged relative to the rotating shaft, the rotating shaft is suitable for being matched with the driving groove through the convex block, so that in the rotating process of the rotating shaft, the convex block is suitable for driving the driving plate to reciprocate along the axial direction of the rotating shaft through the circular motion around the axis of the rotating shaft, and then the connecting buckle forming assembly connected with the driving plate is driven to vertically move.

Preferably, the upper end of drive plate is provided with the spread groove, connector link shaping subassembly through the bottom set up with the parallel connecting block of spread groove, so that connector link shaping subassembly passes through the connecting block with the spread groove carries out slidable and connects, and then the drive plate is followed the axial of pivot carries out the in-process that removes, connector link shaping subassembly can carry out the removal of vertical direction to the realization is detained and is carried out half drawing of patterns to first connector link and second connector link after the shaping.

Preferably, a fourth sliding groove and a fifth sliding groove are formed in the movable mold core, and the bottom of the fourth sliding groove is communicated with the communicating groove; the connecting buckle forming assembly comprises a first connecting buckle mold core and a second connecting buckle mold core, the first connecting buckle mold core comprises a first mold core block and a second mold core block, the first mold core block is fixedly arranged in the fourth chute, the second mold core block is slidably arranged in the fourth chute, and the first mold core block and the second mold core block are matched with each other through a first forming groove and a second forming groove which are respectively arranged on the joint end surfaces to form a first connecting buckle; the second connecting buckle mold core is slidably mounted in the fifth chute, and the second connecting buckle mold core and the fifth chute are matched with each other through a fourth forming groove and a third forming groove which are respectively arranged on the attached side walls to form a second connecting buckle; the second core block and the second connecting buckle core are connected with a first connecting groove and a second connecting groove which are formed in the driving plate through a first connecting block and a second connecting block which are arranged at the bottom respectively, so that the second core block and the second connecting buckle core are driven by the driving plate to respectively vertically move along the fourth sliding groove and the fifth sliding groove, and therefore the semi-demolding of the formed first connecting buckle and the second connecting buckle is realized.

Preferably, a third inclined chute is formed in the movable mold core, the first inverted mold core is slidably mounted in the third chute, a connecting portion is arranged in the middle of the first inverted mold core, the first inverted mold core is suitable for being in threaded connection with a threaded section arranged at the upper end of the rotating shaft through a threaded hole formed in the connecting portion, and then the rotating shaft rotates, the first inverted mold core is suitable for sliding in a downward inclined mode along the third chute in a threaded fit mode, so that the first inverted mold core after being molded is subjected to demolding.

Preferably, a second inverted buckle core is obliquely and slidably mounted on one side of the movable core and used for forming a second inverted buckle; the ejection mechanism comprises a vertically arranged first ejector rod and a second ejector rod which is obliquely arranged, the first ejector rod is connected with the movable core, the second ejector rod is connected with the second inverted-buckle core, so that the movable core is driven by the first ejector rod to drive the formed rear cover plate to vertically move upwards, the second inverted-buckle core is driven by the second ejector rod to synchronously tilt and move upwards, and the second inverted-buckle core can be separated from the formed second inverted buckle.

Preferably, a vertical first sliding groove is formed in the fixed mold core, the movable mold core is slidably mounted in the first sliding groove, the sliding cavity is formed in the bottom of the first sliding groove, and the first ejector rod is suitable for penetrating through the first sliding groove and being connected with the movable mold core.

Preferably, the fixed mold core is further provided with an inclined second sliding groove, the second inverted mold core is slidably mounted in the second sliding groove, and the second ejector rod is suitable for obliquely penetrating through the second sliding groove to be connected with the second inverted mold core.

Preferably, the fixed mold core is provided with a supporting block, and the supporting block is suitable for penetrating through the movable mold core and extending into the third chute to abut against the bottom of the first inverted mold core, so that the supporting block can provide support for the first inverted mold core when the first inverted mold core is molded.

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

(1) come jack-up movable mould core to go up through liftout mechanism and move the preliminary drawing of patterns of back shroud and design core after realizing the shaping to moving the in-process that the mould core moved up, demoulding mechanism carries out reverse slip with drive connector link shaping subassembly and first back-off core through the cooperation with fixed mould core, thereby realize the drawing of patterns to the first back-off after the shaping, first connector link and second connector link, can also improve the product quality after the drawing of patterns when effectual reduction is follow-up to the drawing of patterns degree of difficulty of back shroud.

(2) The ejection mechanism drives the movable core to drive the molded rear cover plate to move upwards, and simultaneously drives the second inverted core to incline and synchronously move upwards so as to realize demolding of the second inverted core and the second inverted buckle molded on the rear cover plate; and meanwhile, in the process of moving the core upwards, the demolding mechanism is suitable for driving the first inverted-buckle core to perform reverse inclined sliding relative to the moving core so as to realize the demolding of the first inverted-buckle core and the molded first inverted buckle, and the subsequent forced demolding difficulty can be effectively reduced through the demolding of the first inverted buckle and the second inverted buckle.

(3) The connecting buckle forming component is matched with the movable mould core to form a first connecting buckle and a second connecting buckle; therefore, in the moving core moving up and demoulding process, the first connecting buckle and the second connecting buckle after forming are subjected to semi-demoulding through the vertical movement of the cores of the first core block and the second core block which are respectively driven by the demoulding mechanism, so that the demoulding force applied to the first connecting buckle and the second connecting buckle can be effectively reduced in the subsequent forced demoulding process, and the demoulding quality of the first connecting buckle and the second connecting buckle is improved.

Drawings

Fig. 1 is a schematic structural diagram of a rear cover plate in the prior art.

Fig. 2 is a cross-sectional view of a rear cover plate of the related art.

Fig. 3 is a schematic view of the main structure of the present invention.

Fig. 4 is a schematic view showing an exploded state of the core package in the present invention.

FIG. 5 is a schematic view showing the structure of the fixed core of the present invention.

FIG. 6 is a schematic view showing the structure of the movable core of the present invention.

Fig. 7 is a structural view of a first insert for reverse-threading in the present invention.

Fig. 8 is a structural view of a second insert for reverse-buckling in the present invention.

Fig. 9 is an exploded view of the first coupling insert of the present invention.

Fig. 10 is a structural view of a core of a second connector link according to the present invention.

Fig. 11 is a schematic view showing an exploded state of the ejector mechanism of the present invention.

Fig. 12 is a structural sectional view of a driving plate in the present invention.

Fig. 13 is a schematic view showing a state in molding the core pack of the present invention.

Fig. 14 is a schematic view showing a state in which the core package is demolded in the present invention.

Fig. 15 is a schematic view showing a state of the mold-releasing mechanism in molding the core package of the utility model.

Fig. 16 is a schematic view showing the state of the mold-releasing mechanism at the time of demolding the core package in the present invention.

Fig. 17 is a schematic view illustrating the driving cooperation principle between the rotating shaft and the driving plate according to the present invention.

In the figure: the rear cover plate 100, the first reverse buckle 110, the second reverse buckle 120, the first connecting buckle 130, the second connecting buckle 140, the fixed die 200, the ejector mechanism 300, the first ejector rod 310, the second ejector rod 320, the core assembly 4, the shaping core 41, the first sliding groove 411, the supporting block 412, the second sliding groove 413, the sliding cavity 414, the rack segment 415, the movable core 42, the third sliding groove 421, the fourth sliding groove 422, the fifth sliding groove 423, the third shaping groove 4230, the communicating groove 424, the first reverse buckle core 43, the connecting portion 431, the threaded hole 4310, the second reverse buckle core 44, the first connecting buckle core 45, the core block I451, the first shaping groove 4510, the core block II 452, the second shaping groove 4520, the first connecting block 4521, the second connecting buckle core 46, the fourth shaping groove 460, the second connecting block 461, the demolding mechanism 5, the rotating shaft 51, the threaded section 511, the first bevel gear 512, the convex block 513, the second bevel gear 52, the transmission shaft 521, and the second bevel gear 522, The gear 523, the connecting base 53, the driving plate 54, the through hole 541, the driving groove 5410, the first connecting groove 542, and the second connecting groove 543.

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 described below or between the technical features 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.

One of preferred embodiments of the present application, as shown in fig. 3 to 17, an injection mold for an automobile back cover plate 100 includes a stationary mold 200, a movable mold, an ejector mechanism 300, and a core assembly 4 for molding the back cover plate 100. Wherein the fixed mould 200 is fixed to be set up, and the movable mould cooperates in order to mould plastics required back shroud 100 through covering the fixed mould 200 and with core subassembly 4, and liftout mechanism 300 is installed in the below of fixed mould 200 to realize tentatively drawing of patterns through liftout mechanism 300 and core subassembly 4's cooperation behind the messenger back shroud 100 injection moulding, after tentatively drawing of patterns is accomplished, the rethread compulsory drawing of patterns breaks away from back shroud 100 and core subassembly 4 completely.

The core assembly 4 includes a fixed core 41, a movable core 42, a connecting buckle forming assembly and a back-off demoulding structure. A first reverse core 43 and a second reverse core 44. The fixed core 41 is fixedly installed to the fixed mold 200, and the movable core 42 is slidably installed to an upper portion of the fixed core 41 so as to be used for molding a housing of the back cover plate 100 by cooperation of the movable core 42 and the fixed core 41. The connector-buckle molding assembly is vertically slidably mounted to the moving core 42 such that the connector-buckle molding assembly is used to mold the first and second connector buckles 130 and 140 by cooperation with the moving core 42. The reverse demoulding structure comprises a first reverse mould core 43 and a second reverse mould core 44, wherein the first reverse mould core 43 and the second reverse mould core 44 are obliquely and slidably mounted on the movable mould core 42, the first reverse mould core 43 is matched with the movable mould core 42 to form a first reverse buckle 110, and the second reverse mould core 44 is used for forming a second reverse buckle 120.

Meanwhile, the movable core 42 is further provided with a demolding mechanism 5, and the demolding mechanism 5 can be respectively matched with the connecting buckle forming assembly and the first reverse-buckled core 43. The liftout mechanism 300 can be connected with the movable core 42, so that the movable core 42 drives the molded rear cover plate 100 to vertically slide along the fixed core 41 under the driving of the liftout mechanism 300, and then the movable core 42 and the fixed core 41 are separated to realize the preliminary demolding of the molded rear cover plate 100. And in the process of upward sliding of the movable core 42, the demolding mechanism 5 may drive the connecting buckle molding assembly to perform vertical reverse sliding relative to the movable core 42, so as to perform half-demolding on the first connecting buckle 130 and the second connecting buckle 140 on the molded rear cover plate 100, and drive the first reverse buckling core 43 to perform oblique reverse sliding relative to the movable core 42, so as to perform demolding on the first reverse buckling 110 on the molded rear cover plate 100. Meanwhile, the second inverted buckle core 44 is driven by the ejector mechanism 300 to move up along the fixed core 41 in a synchronous inclination manner with the movable core 42, so that the second inverted buckle core 44 and the molded second inverted buckle 120 are demolded, and the demolding structure for demolding the first inverted buckle 110 and the second inverted buckle 120 is formed through synchronous cooperation of the demolding mechanism 5 and the ejector mechanism 300.

It is understood that the separation of the molded back cover plate 100 from the sizing core 41, the half separation of the coupling molding assembly from the first coupling buckle 130 and the second coupling buckle 140, respectively, and the demolding of the first and second inverse buckle cores 43 and 44 from the first and second inverse buckles 110 and 120, respectively, can be achieved by the driving of the ejector mechanism 300. Therefore, in the subsequent forced demolding process, demolding of the rear cover plate 100 can be completed only by separating the rear cover plate 100 from the side wall of the movable mold core 42 and separating the first connecting fastener 130 and the second connecting fastener 140 from the half-connection of the movable mold core 42. Therefore, forced demoulding is convenient to carry out, and the quality of the demoulded product can be effectively improved.

In the present embodiment, as shown in fig. 4 to 6, 8, 13 and 14, the fixed core 41 is provided with a vertical first chute 411 and an inclined second chute 413, respectively, the movable core 42 is slidably mounted to the first chute 411, and the second inverted core 44 is slidably mounted to the second chute 413. The liftout mechanism 300 includes a first ejector rod 310 and a second ejector rod 320, the first ejector rod 310 is vertically arranged, the second ejector rod 320 is obliquely arranged, the first ejector rod 310 can penetrate through a first sliding groove 411 and is connected with the bottom of the movable mold core 42, the second ejector rod 320 can penetrate through a second sliding groove 413 and is connected with the bottom of the second inverted mold core 44, so that the movable mold core 42 drives the formed rear cover plate 100 to vertically move upwards under the driving of the first ejector rod 310, the second inverted mold core 44 is synchronously obliquely moved upwards under the driving of the second ejector rod 320, and then the second inverted mold core 44 and the formed rear cover plate 100 can be horizontally staggered to realize the separation from the second inverted mold core 120.

In this embodiment, as shown in fig. 5 to 7, 13 and 14, an inclined third sliding groove 421 is provided on the movable core 42, and the first undercut core 43 is slidably mounted on the third sliding groove 421, so that the first undercut core 43 cooperates with an upper end of the third sliding groove 421 to form the first undercut 110. And meanwhile, the supporting block 412 is arranged on the fixed core 41, when the core assembly 4 is subjected to injection molding, the supporting block 412 can penetrate through the movable core 42 and extend into the third sliding groove 421 to be abutted against the bottom of the first inverted core 43, so that the first inverted core 43 can be ensured to be attached to the side wall of the third sliding groove 421, and the first inverted core 43 is subjected to molding to provide support, so that the molding quality of the molded first inverted core 110 is improved. After the injection molding is completed, the first reverse core 43 is connected to the demolding mechanism 5 through the middle portion, so that the first reverse core 43 slides in an inclined downward movement relative to the movable core 42 along the third slide groove 421 under the driving of the demolding mechanism 5, thereby detaching the first reverse core 43 from the molded first reverse 110.

In the present embodiment, as shown in fig. 6, 9, 10, 13, and 14, the movable core 42 is provided with a fourth slide groove 422 and a fifth slide groove 423. The connecting buckle forming assembly comprises a first connecting buckle mold core 45 and a second connecting buckle mold core 46, the first connecting buckle mold core 45 comprises a first mold core block 451 and a second mold core block 452, the first mold core block 451 is fixedly arranged on one side of the fourth sliding groove 422, the second mold core block 452 is slidably arranged on the other side of the fourth sliding groove 422, the first mold core block 451 and the second mold core block 452 are mutually attached, a first forming groove 4510 is formed in the attaching end face of the first mold core block 451, a second forming groove 4520 is formed in the attaching end face of the second mold core block 452, and the first forming groove 4510 and the second forming groove 4520 are matched with each other to form the first connecting buckle 130. The second connecting buckle core 46 is slidably mounted on the fifth sliding groove 423, a side wall of the second connecting buckle core 46 is attached to a side wall of the fifth sliding groove 423, and a pair of matched side walls of the second connecting buckle core 46 and the fifth sliding groove 423 are respectively provided with a fourth forming groove 460 and a third forming groove 4230, so that the fourth forming groove 460 and the third forming groove 4230 are matched with each other to form the second connecting buckle 140. The first core block 451 and the second connecting buckle core 46 are both connected with the demolding mechanism 5 through the bottom, so that the first core block 451 and the second connecting buckle core 46 respectively slide vertically along the fourth sliding groove 422 and the fifth sliding groove 423 relative to the movable core 42 under the driving of the demolding mechanism 5, and then the first core block 451 and the second connecting buckle core 46 can be separated from the molded first connecting buckle 130 and the molded second connecting buckle 140, and thus the half-demolding of the first connecting buckle 130 and the second connecting buckle 140 is realized.

It can be understood that, in the existing injection mold, the fastener forming assembly is fixedly disposed on the movable core 42, and thus the first and second fasteners 130 and 140 are separated from the fastener forming assembly by subsequent forced demolding; as can be seen from fig. 1, the first connecting buckle 130 and the second connecting buckle 140 are both long and thin structures, and have a cross-shaped or i-shaped cross section, a single side of which has a small thickness, but has a large contact area with the forming groove, so that the first connecting buckle 130 and the second connecting buckle 140 are easily broken or damaged due to an excessive demolding force during the forced demolding process. In the embodiment, the molding grooves are divided into the first molding groove 4510, the second molding groove 4520, the fourth molding groove 460 and the third molding groove 4230, so that the demolding mechanism 5 drives the first molding groove 4510 and the fourth molding groove 460 to respectively separate and slide relative to the second molding groove 4520 and the third molding groove 4230 in the process of primary demolding, so as to realize half demolding of the first connecting buckle 130 and the second connecting buckle 140, and further, in the subsequent forced demolding process, the contact surface between the first connecting buckle 130 and the second connecting buckle 140 is reduced by half, that is, the demolding force generated in demolding is reduced by at least half, so as to ensure that the first connecting buckle 130 and the second connecting buckle 140 are not broken or damaged after being completely demolded, and improve the molding quality of the first connecting buckle 130 and the second connecting buckle 140.

It can be further understood that when the demolding mechanism 5 drives the first molding groove 4510 and the fourth molding groove 460 to slide apart, the contact areas of the first molding groove 4510 and the fourth molding groove 460 with the first connecting buckle 130 and the second connecting buckle 140 are also half, and the contact forces of the second molding groove 4520 and the third molding groove 4230 with the first connecting buckle 130 and the second connecting buckle 140 can offset a part of the demolding force generated when the first molding groove 4510 and the fourth molding groove 460 are demolded with the first connecting buckle 130 and the second connecting buckle 140, so as to ensure that the pulling force applied to the connecting positions of the first connecting buckle 130 and the second connecting buckle 140 with the back cover plate 100 is smaller than the demolding force applied to the first connecting buckle 130 and the second connecting buckle 140 by the first molding groove 4510 and the fourth molding groove 460. Meanwhile, the demolding force generated by the half demolding of the first molding groove 4510 and the fourth molding groove 460 also causes the first connecting buckle 130 and the second connecting buckle 140 to be in certain loose contact with the second molding groove 4520 and the third molding groove 4230, thereby facilitating the subsequent forced demolding.

In one embodiment of the present application, as shown in fig. 11 to 17, the demolding mechanism 5 includes a rotating shaft 51, a drive plate 54, and a transmission portion 52. Wherein the rotating shaft 51 is rotatably and obliquely arranged on the movable mold core 42, so that the axis of the rotating shaft 51 is parallel to the demolding direction of the first inverted mold core 43; the upper end of the rotating shaft 51 is in threaded connection with the first back-off core 43; a communicating groove 424 is formed in the movable mold core 42, the fourth sliding groove 422 and the fifth sliding groove 423 are communicated with two ends of the communicating groove 424 through bottoms, the driving plate 54 is slidably mounted in the communicating groove 424, the driving plate 54 is connected with the bottom of the connecting buckle forming assembly in a matched mode, and meanwhile the driving plate 54 is connected with the middle of the rotating shaft 51 through a deflection structure; the transmission part 52 is connected to the lower end of the rotating shaft 51 and extends into the fixed core 41 together with the lower end of the rotating shaft 51, so that the rotating shaft 51 is matched with a matching part arranged on the fixed core 41 through the transmission part 52. When the movable core 42 is driven by the ejector mechanism 300 to move vertically upwards for demolding, the rotating shaft 51 can move upwards synchronously with the movable core 42, and in the process of moving upwards, the rotating shaft is rotated through the matching of the transmission part 52 and the matching part, so that the first inverted core 43 is driven to move downwards obliquely along the axial direction of the rotating shaft 51 relative to the movable core 42 through threaded connection, and the demolding of the first inverted core 43 and the first inverted core 110 is realized; meanwhile, the driving plate 54 is driven by the deflection structure to drive the fastener forming assembly to vertically move relative to the movable core 42, so as to realize half-demolding of the first fastener 130 and the second fastener 140.

In this embodiment, as shown in fig. 7, 11, 15 and 16, a connection portion 431 is disposed in the middle of the first undercut core 43, a threaded hole 4310 is disposed on the connection portion 431, and a threaded section 511 is disposed at the upper end of the rotating shaft 51, so that the rotating shaft 51 is matched with the threaded hole 4310 on the connection portion 431 through the threaded section 511 to form a threaded connection between the first undercut core 43 and the rotating shaft 51; therefore, in the process of rotating the rotating shaft 51, the first undercut core 43 can slide obliquely downwards along the third sliding groove 421 in a threaded fit manner, and demoulding with the formed first undercut 110 is further achieved.

In this embodiment, as shown in fig. 5, 11, 15 and 16, a sliding cavity 414 is disposed at the bottom of the first sliding slot 411 on the fixed mold core 41, a matching portion is disposed on a side wall of the sliding cavity 414, and the lower end of the rotating shaft 51 is adapted to extend into the sliding cavity 414 through the movable mold core 42 and match with the matching portion in the sliding cavity 414 through the transmission portion 52 all the time in the process of moving the movable mold core 42 upwards and removing the mold.

Specifically, the mating portion is a vertically disposed rack segment 415; the lower end of the rotating shaft 51 is provided with a first bevel gear 512; the transmission part 52 comprises a transmission shaft 521, a second bevel gear 522 and a gear 523, wherein the transmission shaft 521 is horizontally arranged and connected with the rotating shaft 51 through a connecting seat 53, so as to ensure that the transmission part 52 is always connected with the rotating shaft 51 in the process of moving up the rotating shaft 51. The second bevel gear 522 and the gear 523 are respectively installed at two ends of the transmission shaft 521, so that the first bevel gear 512 and the second bevel gear 522 are engaged, the gear 523 is engaged with the rack section 415, and two sides of the connecting seat 53 are in sliding fit with the side wall of the sliding cavity 414, and further when the moving core 42 moves upwards and is demolded, the transmission part 52 can synchronously move upwards along with the rotating shaft 51 and drive the rotating shaft 51 to rotate through the engagement of the gear 523 along the rack section 415.

In this embodiment, as shown in fig. 11, 12, and 15 to 17, the driving plate 54 is a straight plate and perpendicular to the axis of the rotating shaft 51, a through hole 541 is provided in the middle of the driving plate 54, and the driving plate 54 is engaged with the rotating shaft 51 through the through hole 541. The deflecting structure includes a protrusion 513 and a driving groove 5410, the protrusion 513 is fixedly disposed on a sidewall of the rotating shaft 51, the driving groove 5410 is annularly disposed on a sidewall of the through hole 541, and the driving groove 5410 is horizontally disposed with respect to the rotating shaft 51, that is, an included angle exists between a radial direction of the driving groove 5410 and an axial direction of the rotating shaft 51, and a value of the included angle is an inclination angle α of the rotating shaft 51 with respect to a vertical direction. The rotating shaft 51 is matched with the driving slot 5410 through the protrusion 513, so that during the rotation of the rotating shaft 51, the protrusion 513 drives the driving plate 54 to reciprocate along the axial direction of the rotating shaft 51 through the circular motion around the axis of the rotating shaft 51, and then the connecting buckle forming assembly connected with the driving plate 54 is driven to move vertically.

It can be understood that the half-mold of the connector link forming assembly with the first connector link 130 and the second connector link 140 only requires that the connector link forming assembly does not contact with the first connector link 130 and the second connector link 140, that is, the connector link forming assembly only needs to move for a short stroke to be separated from the contact with the first connector link 130 and the second connector link 140 to realize the half-mold.

In this embodiment, in order to ensure that the driving plate 54 drives the connecting buckle forming assembly to move vertically by moving along the axial direction of the rotating shaft 51 under the driving of the rotating shaft 51 and the deflecting structure, a connecting groove may be provided at the upper end of the driving plate 54, meanwhile, the bottom of the connecting buckle forming component is provided with a connecting block parallel to the connecting groove, so that the connecting buckle forming component can be connected with the connecting groove in a sliding way through the connecting block, and further, during the movement of the driving plate 54 in the axial direction of the rotary shaft 51, the driving force of the driving plate 54 to the coupling buckle forming assembly is in the normal direction of the coupling block, so that the driving force can be divided into a horizontal component and a vertical component, the connecting buckle forming assembly can vertically move along the movable core 42 along with the driving plate 54 driven by the vertical component, so as to realize half-demolding of the molded first connecting fastener 130 and the molded second connecting fastener 140.

Specifically, as shown in fig. 9, 10, 12, and 15 to 17, the connection block includes a first connection block 4521 and a second connection block 461, and the connection groove includes a first connection groove 542 and a second connection groove 543. The first connecting block 4521 is disposed at the bottom of the second core block 452, the second connecting block 461 is disposed at the bottom of the second connecting buckle core 46, the first connecting groove 542 and the second connecting groove 543 are respectively disposed at two sides of the upper end of the driving plate 54, so that the second core block 452 and the second connecting buckle core 46 are respectively connected with the first connecting groove 542 and the second connecting groove 543 on the driving plate 54 through the first connecting block 4521 and the second connecting block 461 at the bottom in a sliding limit manner, so that when the driving plate 54 moves axially along the rotating shaft 51 under the driving of the rotating shaft 51, the second core block 452 and the second connecting buckle core 46 can be driven to move vertically along the fourth sliding groove 422 and the fifth sliding groove 423, and thus the first connecting buckle 130 and the second connecting buckle 140 after being molded are half-molded are realized.

It will be appreciated that, as shown in fig. 17, the maximum moving distance of the driving plate 54 in the axial direction of the rotating shaft 51 is X, which has a value d · tan α, where d is the diameter of the rotating shaft 51, driven by the protrusion 513, so that the driving plate 54 drives the core block two 452 and the second fastener core 46 to have a maximum vertical distance H, which has a value X · cos α, i.e., H ═ d · sin α. Taking specific values, assuming that the diameter d of the rotating shaft 51 is 12mm and the inclination angle α of the rotating shaft 51 is 20 °, the maximum vertical distance H of the core block two 452 and the second connector link core 46 is about 4mm, and it has been fully satisfied that the core block two 452 and the second connector link core 46 are out of contact with the first connector link 130 and the second connector link 140, respectively, to achieve half-mold release.

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. The utility model provides a back-off demoulding structure for automobile back shroud which characterized in that includes:

the fixed mold core is fixedly arranged on the fixed mold, and the movable mold core is arranged on the upper part of the fixed mold core in a sliding manner;

the first inverted core is obliquely and slidably arranged on the movable core and is suitable for being matched with the movable core to form a first inverted buckle;

the second inverted buckle core is obliquely arranged on the side part of the movable core and is used for forming a second inverted buckle;

the demolding mechanism is inclined to the movable core and is suitable for being connected with the first inverted core; and

the ejection mechanism is suitable for driving the movable mould core to vertically move upwards and driving the second inverted mould core to obliquely and synchronously move upwards; the movable core is suitable for driving the first inverted core to move downwards in an inclined mode relative to the movable core through the demolding mechanism in the process of moving upwards vertically.

2. The inverted buckle ejector structure for automobile rear cover plates according to claim 1, wherein: the demolding mechanism comprises a rotating shaft and a transmission part; the rotating shaft is rotatably and obliquely arranged on the movable mold core, and the upper end of the rotating shaft is in threaded connection with the first back-off mold core; the transmission part is connected with the lower end of the rotating shaft, the transmission part is suitable for extending into the shaping core along with the lower end of the rotating shaft and is matched with a matching part arranged on the shaping core, so that when the movable core moves vertically upwards under the driving of the material ejecting mechanism, the rotating shaft is suitable for rotating through the matching of the transmission part and the matching part in the process of moving upwards synchronously along with the movable core, and the first back-off core is driven to move downwards and obliquely relative to the movable core through threaded connection.

3. The inverted buckle ejector structure for automobile rear cover plates according to claim 2, wherein: the fixed core is provided with a sliding cavity, the matching part is arranged in the sliding cavity, and the rotating shaft is positioned in the sliding cavity all the time and is matched with the matching part through the transmission part in the process of moving the core to move and demoulding.

4. The structure of claim 3, wherein: the matching part is a rack segment which is vertically arranged; the lower end of the rotating shaft is provided with a first bevel gear; the transmission part comprises a transmission shaft, and a second bevel gear and a gear which are arranged at two ends of the transmission shaft, the transmission shaft is horizontally arranged and is connected with the rotating shaft through a connecting seat, so that the first bevel gear and the second bevel gear are meshed, and meanwhile, the gear is meshed with the rack section; the two sides of the connecting seat are in sliding fit with the side wall of the sliding cavity, so that when the movable mold core moves upwards and is demolded, the transmission part is suitable for driving the rotating shaft to rotate through the meshing of the gears along the rack segments.

5. The structure of an inverted buckle mold release for an automobile rear cover plate according to any one of claims 2 to 4, characterized in that: the movable mold core is provided with a third inclined chute, the first inverted mold core is slidably mounted in the third chute, a connecting part is arranged in the middle of the first inverted mold core, the first inverted mold core is suitable for being in threaded connection with a threaded section arranged at the upper end of the rotating shaft through a threaded hole formed in the connecting part, and then the rotating shaft rotates, and the first inverted mold core is suitable for sliding in an inclined and downward mode along the third chute in a threaded fit mode.

6. The undercut demold structure for a vehicle rear cover according to claim 1, wherein: the fixed mold core is provided with a vertical first chute, the movable mold core is slidably mounted in the first chute, and the material ejecting mechanism is suitable for penetrating through the first chute through a vertical first ejector rod to be connected with the movable mold core.

7. The inverted buckle ejector structure for automobile rear cover plates according to claim 1, wherein: the fixed mold core is also provided with an inclined second chute, and the second inverted mold core is slidably mounted in the second chute so as to enable the second inverted mold core and the movable mold core to be arranged in an inclined manner; the material ejecting mechanism is suitable for being connected with the second inverted buckle core through a second ejector rod which is obliquely arranged and penetrates through the second sliding groove.

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