CN113427722A

CN113427722A - Core-pulling structure with large-angle downward slope and injection mold for automobile exterior trimming parts

Info

Publication number: CN113427722A
Application number: CN202110895571.6A
Authority: CN
Inventors: 陈垚; 彭书印; 何世伟; 罗威; 刘勇
Original assignee: Guangdong East Asia Electrical Appliance Co Ltd
Current assignee: Guangdong East Asia Electrical Appliance Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2021-09-24

Abstract

The invention provides a core-pulling structure with a large-angle downward slope and an injection mold for automobile exterior trimming parts, wherein the core-pulling structure comprises: one end of the first inclined ejector rod is connected with the first inclined ejector block, and the other end of the first inclined ejector rod is connected with the inclined ejector seat; the first inclined ejecting block is provided with a driving sliding chute; the inclined ejector seat is connected with a sliding seat which is slidably installed on the ejector plate, the sliding seat is connected with a sliding cross rod, and the first inclined ejector block finishes large-angle tripping under the assistance of the cross rod and the sliding seat. The core pulling structure further comprises a driving slide rod, a second inclined ejector block and a second inclined ejector rod, the driving slide rod is fixedly connected with the second inclined ejector block, the driving slide groove is in sliding fit with the driving slide groove, the second inclined ejector block moves in the direction of the second inclined ejector rod under the driving of the first inclined ejector block, and then another large-angle reverse buckle on the automobile exterior trimming part is completed. The core pulling mechanism has the advantages of small occupied space and high reliability.

Description

Core-pulling structure with large-angle downward slope and injection mold for automobile exterior trimming parts

Technical Field

The invention relates to the field of automobile molds, in particular to a core pulling structure with a large-angle downward slope and an injection mold for an automobile exterior trimming part.

Background

Due to the requirements of appearance or structure, the structure of the automobile exterior trimming part is complex, and some automobile exterior trimming parts have large-angle reverse buckles, so that a large-angle downward-slope retreating ejector structure is required in an injection mold, namely, in the ejection stage, the inclined ejector head retreats along the opening direction of a product under the guiding and driving of the inclined ejector rod.

As shown in FIG. 1, in a cross-sectional view of a bumper, the position indicated by an arrow A is a reverse buckle, the mold stripping angle and the Z axis are 11 degrees, namely, the downhill angle alpha of the inclined ejector block at the position A reaches 79 degrees (the downhill angle is the included angle between the withdrawing movement direction of the inclined ejector block and the horizontal direction). The larger the angle α, the more torque the lifter bar connected to the lifter block generates, and the more easily the lifter bar 1 bends or breaks. And the position indicated by the arrow B also has a reverse buckle, and the descending angle beta of the inclined ejecting block at the position is 39 degrees.

There are generally three solutions to this angle back-off: firstly, play B board loose core, the advantage: the stress of loosing core is good, and it is smooth and easy to loose core. The disadvantages are as follows: for the bumper mold, the weight of the plate B is large, the requirements on positioning and action driving are high, and the risk is also large. Secondly, adopt the hydro-cylinder to loose core, the advantage: the conventional solution is safe and reliable in action. The disadvantages are as follows: 1. and 2, the part of the core is difficult to process, and in the injection molding process, a core pulling action needs to be added, so that the injection molding period is increased. 3. The oil cylinder mechanism occupies a large space, the size of the die needs to be increased, and certain influence is arranged on the arrangement and ejection of water holes of the die. Thirdly, the advantages are that: the mold has a simple structure. The disadvantages are as follows: the product has the risk of strain and even damage.

To sum up, the large-angle reverse buckle at the position A and the reverse buckle at the position B are realized on the same set of die, the difficulty is high, and a die structure with simple structure, high safety and reliability and high die stripping efficiency is needed urgently.

Disclosure of Invention

The invention aims to provide a core-pulling structure and a die for a large-angle downhill, which aim to solve the problem that a large automobile exterior trimming part with a plurality of downward-inclined reverse buckles is difficult to demould.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a loose core structure of big angle downhill path, it includes:

one end of the first inclined ejector rod is connected with the first inclined ejector block, and the other end of the first inclined ejector rod is connected with the inclined ejector seat; the first inclined ejecting block is provided with a driving sliding chute;

the first guide block is provided with a first chute in sliding fit with the first inclined ejector rod, and the first guide block is arranged on a plate B of the die;

the sliding seat is transversely connected with an ejector plate of the die in a sliding manner, a sliding chute is formed in the sliding seat, and the inclined ejector seat is in sliding fit with the sliding chute;

the cross rod is obliquely arranged, two ends of the cross rod are respectively connected with the bottom plate and the plate B of the mold, and the sliding seat is in sliding fit with the cross rod;

a drive slide bar in sliding fit with the drive chute;

one end of the second oblique ejector rod is connected with the driving slide rod;

the second guide block is provided with a second chute in sliding fit with the second inclined ejector rod, and the second guide block is arranged on a plate B of the die;

the first inclined ejector block and the second inclined ejector block are respectively used for forming two reverse buckles of the automobile exterior trimming part, wherein the angles of the upper slope and the lower slope are different.

When the mold is opened, the plate B and the ejector plate of the mold move in opposite directions, the sliding seat arranged on the ejector plate horizontally moves under the driving of the cross rod, and then the inclined ejector seat is driven to move along the sliding chute, so that the first inclined ejector block obliquely moves downwards relative to a product in a preset direction and finally breaks away from the product. The first ejector pin rod of the core pulling structure can complete large-angle downhill tripping with the aid of the sliding seat, the inclination of the inclined ejector seat is reduced, the supporting force borne by the inclined ejector pin is increased, and the ejection motion is stable. Meanwhile, the first inclined ejector block drives the driving slide rod to move obliquely, and the second inclined ejector block moves along the axial direction of the second inclined ejector rod under the action of the second guide block and moves obliquely downwards relative to the product to finally separate from the product. The core pulling mechanism provided by the invention has the advantages that the sliding seat is used for assisting in tripping, the first inclined ejecting block drives the second inclined ejecting block to trip, the tripping action of two large-angle downhill back-off devices with different directions on the same set of die is completed, the occupied space is small, and the reliability is high.

Furthermore, guide sleeves are sleeved outside the first oblique ejector rod, the second oblique ejector rod and the driving slide rod.

Further, the driving slide rod is provided with an axial water carrying channel.

Furthermore, the driving slide rod is also provided with a radial water transporting channel which is communicated with the axial water transporting channel and an inclined ejection block water transporting channel in the second inclined ejection block.

Furthermore, the outer wall of the driving slide bar is provided with at least two sealing grooves, and sealing rubber rings are arranged in the sealing grooves;

the sealing grooves are respectively arranged on two sides of the radial water transporting channel.

The invention also provides an injection mold for the automobile exterior trimming part, which comprises any one of the core-pulling structures with the large-angle downhill;

the mould is still including the B board, thimble board and the bottom plate that set gradually, wherein bottom plate and B board rearward movement, the thimble board for B board and bottom plate forward movement.

Furthermore, a clearance groove is formed in the side face of the plate B and communicated with a driving sliding groove in the first inclined jacking block, and the clearance groove is used for clearance of the driving sliding rod.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a cross-sectional view of a bumper with a steep downhill back;

FIG. 2 is a perspective view of the core pulling structure for large angle downhill of the present invention;

FIG. 3 is a longitudinal sectional view of the injection mold for automobile exterior trims of the present invention at a first lifter bar;

FIG. 4 is a longitudinal sectional view of the injection mold for automobile exterior parts of the present invention at the driving slide bar;

FIG. 5 is a longitudinal cross-sectional view of the core pulling structure of the large angle downhill of the present invention at the driving slide bar;

fig. 6 is an enlarged view at C in fig. 5.

Wherein: 1. the core pulling structure comprises a large-angle downward-sloping core pulling structure, 2, a B plate, 3, an ejector plate, 4, a bottom plate, 10, a first inclined ejector rod, 11, a first inclined ejector block, 12, an inclined ejector seat, 13, a first guide block, 14, a sliding seat, 15, a cross rod, 16, a driving sliding rod, 17, a second inclined ejector rod, 18, a second inclined ejector block, 19, a second guide block 20, a guide sleeve, 111, a driving sliding groove, 131, a first inclined groove, 141, a sliding inclined groove, 161, an axial water conveying channel, 162, a radial water conveying channel, 163, a sealing groove, 164, a sealing rubber ring, 181, an inclined ejector block water conveying channel, 191 and a second inclined groove; 21. and (5) avoiding a clearance groove.

Detailed Description

The technical solution provided by the present invention is explained in more detail below with reference to fig. 2-6.

As shown in fig. 2, a core pulling structure 1 with a large angle downhill includes:

one end of the first inclined ejector rod 10 is connected with the first inclined ejector block 11, and the other end of the first inclined ejector rod is connected with the inclined ejector seat 12; the first inclined ejecting block 11 is provided with a driving chute 111;

a first guide block 13 having a first inclined groove 131 slidably fitted to the first lifter bar 10, as shown in fig. 3, the first guide block 13 being provided on the B plate 2 of the mold;

a sliding seat 14 which is transversely connected with the ejector plate 3 of the mould in a sliding way and is provided with a sliding chute 141, and the inclined ejector seat 12 is matched with the sliding chute 141 in a sliding way;

the cross rod 15 is obliquely arranged, two ends of the cross rod are respectively connected with the bottom plate 4 and the B plate 2 of the mold, and the sliding seat 14 is in sliding fit with the cross rod 15;

a drive slide bar 16 slidably engaged with the drive chute 111;

one end of the second oblique ejector rod 17 is connected with the driving slide bar 16;

a second guide block 19 having a second inclined groove 191 slidably engaged with the second lifter bar 17, as shown in fig. 4, the second guide block 19 being disposed on the B plate 2 of the mold;

the first inclined ejecting block 11 and the second inclined ejecting block 18 are respectively used for forming two reverse buckles of the automobile exterior trimming part with different up-down slope angles.

The core pulling mechanism of the invention utilizes the sliding seat 14 to assist tripping, and the first inclined ejecting block 11 drives the second inclined ejecting block 18 to trip, thus completing the tripping action of two large-angle downhill back-off in different directions on the same set of mould, and having small occupied space and high reliability.

It should be noted that the first lifter bar block may be connected to a plurality of first lifter bars, and particularly for automotive exterior parts with a large transverse span, such as bumpers, the first lifter bars are preferably disposed at both ends of the first lifter bar block. And, can set up a plurality of drive spouts on the first oblique kicking block, correspondingly, the structure of loosing core includes a plurality of second oblique kicking blocks, second oblique ejector pin and second guide block. The arrangement position and the number of the second inclined ejecting blocks are determined according to the specific shape of the automobile exterior trimming part.

The first oblique ejector rod 10, the second oblique ejector rod 17 and the driving slide rod 16 are sleeved with guide sleeves 20. Because the first oblique ejector rod 10, the second oblique ejector rod 17 and the driving slide rod 16 frequently move in the die opening and die closing process, in order to prolong the service life of the die, guide sleeves 20 need to be arranged outside the first oblique ejector rod 10, the second oblique ejector rod 17 and the driving slide rod 16, and the guide sleeves 20 are preferably made of wear-resistant metal.

As shown in fig. 5 and 6, the drive rod 16 has an axial water carrying channel 161. The first inclined ejecting block 11 and the second inclined ejecting block 18 have larger forming surfaces, heat conducted to the first inclined ejecting block 11 and the second inclined ejecting block 18 by automobile exterior trimming parts in the injection molding process is more, and the driving slide bar 16 moves frequently in the mold opening process and also generates heat, so that the driving slide bar 16 is made into a hollow tube, and a water conveying channel is formed by axial through holes of the hollow tube, so that the driving slide bar 16 and the first inclined ejecting block 11 and the second inclined ejecting block 18 around the driving slide bar are cooled rapidly, local overheating of a mold is avoided, cooling time is shortened, and a forming period is shortened.

The driving slide bar 16 is further provided with a radial water transporting channel 162, and the radial water transporting channel 162 is communicated with the axial water transporting channel 161 and an inclined top block water transporting channel 181 in the second inclined top block 18. Through the radial water conveying channel 162 is communicated with the inclined ejecting block water conveying channel 181 in the second inclined ejecting block 18, a water inlet and a water outlet do not need to be arranged on the second inclined ejecting block 18 and the driving slide bar 16 respectively, and one end of the driving slide bar 16 is used as the water inlet or the water outlet, so that the design difficulty of the mold water conveying channel is reduced.

In order to avoid leakage caused by butt joint of the radial water transport channel 162 and the inclined top block water transport channel 181, at least two sealing grooves 163 are formed in the outer wall of the driving slide bar 16, and sealing rubber rings 164 are arranged in the sealing grooves 163; the sealing grooves 163 are respectively disposed at both sides of the radial water carrying channel 162. Preferably, two circles of the sealing groove 163 are arranged on both sides of the radial water carrying channel 162.

The invention also provides an injection mold for the automobile exterior trimming part, which comprises any one of the core-pulling structures 1 with the large-angle downhill;

the mould is still including the B board 2, ejector plate 3 and the bottom plate 4 that set gradually, wherein bottom plate 4 and B board 2 backward movement, ejector plate 3 for B board 2 and bottom plate 4 forward movement.

Further, a clearance groove 21 is formed in the side surface of the B plate 2, and the clearance groove 21 is communicated with the driving sliding groove 111 on the first inclined ejecting block 11 and used for clearance of the driving sliding rod 16. The driving slide bar 16 moves up and down and left and right along with the first inclined ejecting block 11 and the second inclined ejecting block 18, and the clearance groove 21 is arranged to prevent the driving slide bar 16 from interfering with a mold. Moreover, the clearance groove 21 provides a large operation space, which is convenient for a worker to access a water conveying pipeline at the end of the driving slide bar 16.

The die sinking action of the injection mould for the automobile exterior trimming parts is as follows:

the front mold and the rear mold are opened, the ejector plate 3 is ejected forwards relative to the bottom plate 4 and the B plate 2, the sliding seat 14 moves leftwards in the drawing 2 under the driving of the ejector plate 3 and the guiding action of the cross rod 15, the automobile exterior trimming part is ejected upwards vertically by the ejector pins, the ejector pins and the ejector plate 3 move upwards simultaneously, the inclined ejector seat 12 moves leftwards and downwards relative to the ejector plate 3 along the sliding chute 141 on the sliding seat, namely the first inclined ejector block 11 moves leftwards and downwards relative to the automobile exterior trimming part, and then is separated from the B reverse buckle on the automobile exterior trimming part.

In the process of moving the first lifter block 11, the driving slide bar 16 penetrating the first lifter block 11 moves along with the first lifter block 11, and the second lifter block 18 also moves along with the driving slide bar 16 because the driving slide bar 16 is fixedly connected with the second lifter block 18. However, since the second lifter bar 17 is limited by the second stopper, the driving slide bar 16 is continuously moved along the axial direction of the driving slide groove 111 during the moving process to simultaneously accommodate the movement of the first lifter block 11 and the second lifter block 18. The second inclined top block 18 moves downwards and rightwards relative to the automobile exterior trimming part which moves vertically upwards, and then is separated from the reverse buckle at the position A on the automobile exterior trimming part.

In the description of the present invention, it is to be understood that the terms "vertical", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and unless otherwise stated the above words are not intended to have a special meaning.

The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a loose core structure of big-angle downhill path which characterized in that includes:

a drive slide bar in sliding fit with the drive chute;

2. The core pulling structure for the large-angle downhill of claim 1, wherein:

and guide sleeves are sleeved outside the first oblique ejector rod, the second oblique ejector rod and the driving slide rod.

3. The core pulling structure for the large-angle downhill of claim 1, wherein:

the driving sliding rod is provided with an axial water carrying channel.

4. The core pulling structure for the large-angle downhill of claim 3, wherein:

the drive slide bar is also provided with a radial water transporting channel which is communicated with the axial water transporting channel and an inclined jacking block water transporting channel in the second inclined jacking block.

5. The core pulling structure with the large angle downhill of claim 4, wherein:

the outer wall of the driving slide bar is provided with at least two sealing grooves, and sealing rubber rings are arranged in the sealing grooves; the sealing grooves are respectively arranged on two sides of the radial water transporting channel.

6. An injection mold for an automobile exterior trim part, which is characterized by comprising the core-pulling structure with a large-angle downhill as claimed in any one of claims 1-5;

7. The injection mold for automobile exterior trims according to claim 6,

and a clearance groove is formed in the side surface of the plate B and communicated with the driving sliding groove in the first inclined jacking block, and the clearance groove is used for keeping away the driving sliding rod.