CN217073214U

CN217073214U - Mold core-pulling mechanism

Info

Publication number: CN217073214U
Application number: CN202220982171.9U
Authority: CN
Inventors: 王猛; 杨云帆
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-07-29
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses a mould core-pulling mechanism, which comprises a positioning block, a driving piece, a pulling block and an inner pull which are connected in sequence; the driving piece is suitable for driving the drawing block to reciprocate along a first direction; a T-shaped block is fixed at the tail end of the drawing block, a T-shaped groove matched with the T-shaped block is formed in one end of the inner drawer, and a plug used for inserting an inner hole of a product is arranged at the other end of the inner drawer; the T-shaped block can reciprocate in the T-shaped groove; the inner drawer is positioned in a linear tunnel of the mold frame, the linear tunnel is vertical to the first direction, and an included angle between the movement direction of the T-shaped block and the first direction is an acute angle; the drawing block is provided with a positioning hole for inserting the positioning block, and the upper part of the positioning block protrudes out of the surface of the drawing block and is connected with the die frame. The utility model discloses simple structure, processing cost is low, utilizes the locating piece to realize oblique cutting locking simultaneously, can not appear rising the mould and roll back the phenomenon, has greatly improved the product production qualification rate, has reduced product manufacturing cost.

Description

Mold core-pulling mechanism

Technical Field

The utility model relates to a mold design technical field especially relates to a mold core pulling mechanism, specifically is used for on monochromatic, the polychrome mould.

Background

Generally, when a back-off hole or a groove exists on the inner side of a plastic product, an inner core-pulling structure needs to be designed for the injection mold, and the back-off position of the mold is pulled out from the hole or the groove, so that a mold product cannot be stuck in a mold core when being ejected. An inner core-pulling structure in the prior art usually adopts an inclined guide post mechanism, but when the core-pulling stroke is large, the guide post is insufficient in strength due to the overlong inclined guide post, and is easy to bend and break, and at the moment, a mechanical locking oil cylinder is required to drive the core-pulling.

In the prior art, although an oil cylinder is used for driving a core pulling structure, the problem of internal pulling and retreating caused by the fact that an injection molding force is too large to expand a mold can be generated in the production process of driving the internal pulling by using the oil cylinder.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems of large stroke, insufficient strength, easy bending and breaking or easy occurrence of the phenomenon of mold expansion and rollback in the core-pulling mechanism in the prior art, the utility model provides a mold core-pulling mechanism for solving the problems.

The utility model provides a technical scheme that its technical problem adopted is: a mold core-pulling mechanism comprises a positioning block, a driving piece, a pulling block and an inner pull which are sequentially connected; the driving piece is suitable for driving the drawing block to reciprocate along a first direction; a T-shaped block is fixed at the tail end of the drawing block, a T-shaped groove matched with the T-shaped block is formed in one end of the inner drawer, and a plug used for inserting an inner hole of a product is arranged at the other end of the inner drawer; the T-shaped block can reciprocate in the T-shaped groove; the inner drawer is positioned in a linear tunnel of the mold frame, the linear tunnel is vertical to the first direction, and an included angle between the movement direction of the T-shaped block and the first direction is an acute angle; the drawing block is provided with a positioning hole for inserting the positioning block, and the upper part of the positioning block protrudes out of the surface of the drawing block and is connected with the die frame.

Furthermore, the contact surface of the drawing block and the inner drawing is an inclined surface, and the inclined surface is parallel to the movement direction of the T-shaped block.

Furthermore, two ends of the T-shaped groove extend to the inner drawing surface.

Furthermore, the driving piece is a driving oil cylinder, an oil cylinder connecting rod is fixed at the front end of the drawing block, and the oil cylinder connecting rod is in threaded connection with the extending end of the driving oil cylinder.

Furthermore, the surface of a connecting part of the extending end of the oil cylinder connecting rod and the driving oil cylinder is provided with a rotation stopping sheet in a pressing mode, and the rotation stopping sheet is fixedly connected with the oil cylinder connecting rod.

Furthermore, the size of an included angle a between the moving direction of the T-shaped block and the first direction is 0-45 degrees.

Furthermore, the locating hole link up the drawing piece surface, the locating piece includes spacing portion and connecting portion, spacing portion is located the locating hole, connecting portion are connected with the framed, just the width of locating hole is reduced gradually from the one end of being close to connecting portion to the one end of keeping away from connecting portion.

Furthermore, a clamping groove is formed in one end, far away from the T-shaped block, of the drawing block, and the end portion of the oil cylinder connecting rod is clamped in the clamping groove.

Furthermore, a fixing groove is formed in the surface, connected with the T-shaped block, of the drawing block, one end of the T-shaped block is inserted into the fixing groove, and a screw penetrates through the T-shaped block from the other end of the T-shaped block and is fixedly connected with the drawing block.

Furthermore, the periphery of the extending end of the oil cylinder connecting rod and the driving oil cylinder is provided with rotation stopping grooves which are communicated with each other, and the rotation stopping sheets are positioned in the rotation stopping grooves.

The utility model has the advantages that:

(1) mould mechanism of loosing core, simple structure, the processing cost is low, and original oblique guide pillar mechanism needs the processing of back slope benchmark, and processing is complicated and the expense is higher, the utility model discloses only need openly process, reduced process time and cost, utilize the locating piece to realize oblique cutting locking simultaneously, the mould that can not appear rising returns the phenomenon, has greatly improved the product production qualification rate, has reduced product manufacturing cost.

(2) Mould mechanism of loosing core, can be at the positive direct processing of framed, the die carrier subtracts the iron volume few, stable in structure, intensity is high, is difficult to the deformation fracture.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of an embodiment of a mold core-pulling mechanism according to the present invention;

fig. 2 is a schematic view of the mold core-pulling mechanism of the present invention located in the mold frame and not pulling core;

fig. 3 is a schematic diagram of the mold core-pulling mechanism according to the present invention after core pulling;

FIG. 4 is a schematic view of the assembly of the pulling block and the T-shaped block of the present invention;

FIG. 5 is a schematic view of the assembly of the connecting rod and the driving member of the oil cylinder of the present invention;

fig. 6 is a top view of the drawing block of the present invention;

FIG. 7 is a schematic view of the assembly of the drawing block and the positioning block of the present invention;

fig. 8 is a front view of the inner drawer of the utility model.

In the figure, 1, an inner drawer, 101, a T-shaped groove, 102, a plug, 103, a contact end, 2, a drawing block, 201, a positioning hole, 202, a clamping groove, 203, a fixing groove, 3, a T-shaped block, 4, a positioning block, 401, a limiting part, 402, a connecting part, 5, a driving part, 6, a product, 601, an inner hole, 7, an oil cylinder connecting rod, 8, a rotation stopping sheet, 9, a mold frame, 901, a linear tunnel, 10, a rotation stopping groove, 11 and a screw.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-3, a mold core-pulling mechanism comprises a positioning block 4, a driving element 5, a pulling block 2 and an inner pull 1 which are connected in sequence; the driving piece 5 is suitable for driving the drawing block 2 to reciprocate along a first direction; a T-shaped block 3 is fixed at the tail end of the drawing block 2, one end of the inner drawing 1 is provided with a T-shaped groove 101 matched with the T-shaped block 3, and the other end of the inner drawing 1 is provided with a plug 102 inserted into an inner hole 601 of the product 6; the T-shaped block 3 can reciprocate in the T-shaped groove 101; the inner drawer 1 is positioned in a linear tunnel 901 of the mold frame 9, the linear tunnel 901 is vertical to the first direction, and an included angle between the movement direction of the T-shaped block 3 and the first direction is an acute angle; the drawing block 2 is provided with a positioning hole 201 for inserting the positioning block 4, and the upper part of the positioning block 4 protrudes out of the surface of the drawing block 2 and is connected with the mold frame 9.

The driving piece 5 is fixedly connected with the drawing piece 2, the drawing piece 2 is in sliding connection with the inner drawing piece 1, when the driving piece 5 is drawn backwards, the drawing piece 2 has a backward driving force (approaching to the driving piece 5 along a first direction) under the action of the core pulling force of the driving piece 5, meanwhile, the inner drawing piece 1 is retreated in the linear tunnel 901 by the T-shaped piece 3 through the shearing force of the drawing piece 2, the core pulling action on the product 6 is completed, namely, the plug 102 is separated from the inner hole 601 (shown in fig. 3), as shown in fig. 2, when the drawing piece 2 moves downwards, the T-shaped piece 3 has a downward oblique pulling force on the T-shaped groove 101, the pulling force direction is perpendicular to the end face of the T-shaped piece 3, due to the limitation of the linear tunnel 901, the inner drawing piece 1 only moves backwards along the horizontal direction, and in fig. 2 and 3, the first direction is the vertical direction. The design can change the installation position of the core pulling mechanism, reduce the pulling stroke and improve the pulling strength.

The positioning block 4 is movably connected with the drawing block 2, and when the die is closed, the positioning block 4 is pressed down along with the upper die and inserted into the positioning hole 201 to realize positioning, so that the drawing block 2 is prevented from driving the inner drawer 1 to retreat due to overlarge injection molding force. When the mold is opened, the positioning block 4 is withdrawn along with the upper mold, and the core-pulling action of the drawing block 2 is not influenced.

Preferably, the included angle a between the moving direction of the T-shaped block 3 and the first direction is 0 to 45 °.

In order to ensure that the drawing block 2 is stably connected with the inner drawer 1, preferably, the contact surface of the drawing block 2 and the inner drawer 1 is an inclined surface, and the inclined surface is parallel to the movement direction of the T-shaped block 3, as shown in fig. 8, the end of the inner drawer 1 is provided with an upper contact end 103 and a lower contact end 103, the two contact ends 103 are inclined surfaces and are attached to the drawing block 2, and the T-shaped block 3 enters the inner drawer 1 from the gap between the two contact ends 103 and is matched with the T-shaped groove 101.

Because the inner drawer 1 is positioned in the linear tunnel 901, the surface of the inner drawer 1 is contacted with the inner surface of the mold frame 9, for the convenience of processing, two ends of the T-shaped groove 101 preferably extend to the surface of the inner drawer 1, when the T-shaped block 3 moves to two ends of the T-shaped groove 101, the T-shaped block 3 can be blocked by the mold frame 9 and cannot be separated from the T-shaped groove 101, and in fact, the movement stroke of the T-shaped block 3 is very short and cannot be contacted with the mold frame 9.

Driving piece 5 can be for driving cylinder, and driving cylinder's the end that stretches out has the internal thread usually, for this the utility model discloses be fixed with hydro-cylinder connecting rod 7 at the front end of pull piece 2, the tip of hydro-cylinder connecting rod 7 sets up the external screw thread, hydro-cylinder connecting rod 7 and driving cylinder's the end threaded connection that stretches out. In a further design, in order to avoid the loose screw connection, the surface of the connecting part 402 of the cylinder connecting rod 7 and the extending end of the driving cylinder is pressed with the rotation stopping sheet 8, the rotation stopping sheet 8 is fixedly connected with the cylinder connecting rod 7, the compression joint means that the rotation stopping sheet 8 is tightly attached to the peripheries of the extending ends of the oil cylinder connecting rod 7 and the driving oil cylinder, the rotation stopping sheet 8 is used for preventing the oil cylinder connecting rod 7 and the extending end of the driving oil cylinder from rotating relatively, specifically, the peripheries of the extending ends of the oil cylinder connecting rod 7 and the driving oil cylinder are provided with rotation stopping grooves 10 which are communicated with each other, the rotation stopping sheet 8 is positioned in the rotation stopping grooves 10, as shown in fig. 5, the extending end peripheries of the cylinder connecting rod 7 and the driving cylinder are provided with rotation stopping grooves 10, the two rotation stopping grooves 10 are mutually butted to form a whole notch, the bottom surfaces of the rotation stopping grooves 10 are planes, and the rotation stopping sheets 8 are installed in the rotation stopping grooves 10 and fixed on the cylinder connecting rod 7 through screws.

The oil cylinder connecting rod 7 can be directly welded and fixed at the end part of the drawing block 2, in other optional embodiments, a detachable connection mode can also be adopted, as shown in fig. 1 and 6, a clamping groove 202 is formed in one end, far away from the T-shaped block 3, of the drawing block 2, the end part of the oil cylinder connecting rod 7 is clamped in the clamping groove 202, and the oil cylinder connecting rod 7 is in interference fit with the drawing block 2 at the position of the clamping groove 202.

The drawing block 2 is fixedly connected with the T-shaped block 3, a specific connecting structure is shown in fig. 4, a fixing groove 203 is formed in the surface, connected with the T-shaped block 3, of the drawing block 2, one end of the T-shaped block 3 is inserted into the fixing groove 203, and a screw 11 penetrates through the T-shaped block 3 from the other end of the T-shaped block 3 to be fixedly connected with the drawing block 2. The fixing groove 203 is used for preliminarily positioning the T-shaped block 3, and as the end face of the mounting screw 11 on the T-shaped block 3 is matched with the T-shaped groove 101, a counter bore is arranged on the T-shaped block 3 for avoiding surface friction, the screw 11 is sunk into the counter bore after being locked, and the screw 11 is not in contact with the T-shaped groove 101.

Assembling the positioning block 4 and the drawing block 2: the inserting direction of the positioning block 4 is perpendicular to the first direction, after die assembly, under the limitation of the positioning block 4, the drawing block 2 cannot move along the first direction, in a preferred embodiment, in order to control the depth of the positioning block 4 inserted into the positioning hole 201 and facilitate processing, as shown in fig. 6 and 7, the positioning hole 201 penetrates through the surface of the drawing block 2, the positioning block 4 comprises a limiting portion 401 and a connecting portion 402, the limiting portion 401 is located in the positioning hole 201, the connecting portion 402 is connected with the die frame 9, the width of the positioning hole 201 is gradually reduced from one end close to the connecting portion 402 to one end far away from the connecting portion 402, the positioning block 4 is inserted into the positioning hole 201 from top to bottom, the positioning block 4 is gradually pressed against the positioning hole 201, and looseness of the positioning block 4 and the drawing block 2 can be effectively avoided.

In the description of the present invention, it is to be understood that the terms "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.

Claims

1. A mold core-pulling mechanism is characterized in that: comprises a positioning block (4), a driving piece (5), a drawing block (2) and an inner drawer (1) which are connected in sequence; the driving piece (5) is suitable for driving the drawing block (2) to reciprocate along a first direction; a T-shaped block (3) is fixed at the tail end of the drawing block (2), one end of the inner drawing (1) is provided with a T-shaped groove (101) matched with the T-shaped block (3), and the other end of the inner drawing (1) is provided with a plug (102) used for inserting an inner hole (601) of a product (6); the T-shaped block (3) can reciprocate in the T-shaped groove (101);

the inner drawer (1) is positioned in a linear tunnel (901) of a mould frame (9), the linear tunnel (901) is vertical to a first direction, and an included angle between the movement direction of the T-shaped block (3) and the first direction is an acute angle;

the drawing block (2) is provided with a positioning hole (201) for inserting the positioning block (4), and the upper part of the positioning block (4) protrudes out of the surface of the drawing block (2) and is connected with the die frame (9).

2. The mold core-pulling mechanism according to claim 1, characterized in that: the contact surface of the drawing block (2) and the inner drawing (1) is an inclined surface, and the inclined surface is parallel to the movement direction of the T-shaped block (3).

3. The mold core-pulling mechanism according to claim 1, characterized in that: two ends of the T-shaped groove (101) extend to the surface of the inner drawer (1).

4. The mold core-pulling mechanism according to claim 1, characterized in that: the driving piece (5) is a driving oil cylinder, an oil cylinder connecting rod (7) is fixed at the front end of the drawing block (2), and the oil cylinder connecting rod (7) is in threaded connection with the extending end of the driving oil cylinder.

5. The mold core pulling mechanism according to claim 4, wherein: the oil cylinder connecting rod (7) and the connecting part (402) of the extending end of the driving oil cylinder are in surface pressure joint with a rotation stopping sheet (8), and the rotation stopping sheet (8) is fixedly connected with the oil cylinder connecting rod (7).

6. The mold core-pulling mechanism according to claim 1, characterized in that: the size of an included angle a between the moving direction of the T-shaped block (3) and the first direction is 0-45 degrees.

7. The mold core-pulling mechanism according to claim 1, characterized in that: the positioning hole (201) penetrates through the surface of the drawing block (2), the positioning block (4) comprises a limiting portion (401) and a connecting portion (402), the limiting portion (401) is located in the positioning hole (201), the connecting portion (402) is connected with the mold frame (9), and the width of the positioning hole (201) is gradually reduced from one end close to the connecting portion (402) to one end far away from the connecting portion (402).

8. The mold core pulling mechanism according to claim 4, wherein: one end, far away from the T-shaped block (3), of the drawing block (2) is provided with a clamping groove (202), and the end part of the oil cylinder connecting rod (7) is clamped in the clamping groove (202).

9. The mold core-pulling mechanism according to claim 1, characterized in that: the surface of the drawing block (2) connected with the T-shaped block (3) is provided with a fixing groove (203), one end of the T-shaped block (3) is inserted into the fixing groove (203), and a screw (11) penetrates through the T-shaped block (3) from the other end of the T-shaped block (3) and is fixedly connected with the drawing block (2).

10. The mold core-pulling mechanism according to claim 5, characterized in that: the periphery of the extending end of the oil cylinder connecting rod (7) and the driving oil cylinder is provided with a rotation stopping groove (10) which are communicated with each other, and the rotation stopping sheet (8) is positioned in the rotation stopping groove (10).