Automobile C column guard plate injection mold with reverse ejection structure

Abstract

The utility model relates to an automobile C column guard plate injection mold with a reverse ejection structure, and belongs to the technical field of injection molds. A plurality of reverse ejection mechanisms are arranged in the side wall of the inclined ejection block, each reverse ejection mechanism comprises a side ejection pin with one end capable of extending out of the inclined ejection block, the other end of each side ejection pin abuts against the fixed mold plate, corresponding ejection grooves are formed in the portions, abutting against the side ejection pins, of the fixed mold plate, the sides, away from the forming cavity, of the ejection grooves are deep, and the sides, close to the forming cavity, of the ejection grooves are shallow; the fixed mold plate is further provided with a shrinkage groove, and the shrinkage groove is formed over the ejection groove. According to the scheme, in the process that the inclined ejector block is ejected out of the fixed mold plate, the side ejector pins can be ejected out of the side wall of the inclined ejector block and retract from the side wall of the inclined ejector block through the structure of the ejection groove and the shrinkage groove in the fixed mold plate, so that a protective plate product can be separated from the inclined ejector block more sufficiently, and the protective plate product is prevented from being firmly molded on the molding surface of the inclined ejector block.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to an injection mold for an automobile C-pillar guard plate with a reverse top structure. Background Art

[0002] Most of the products made of plastic raw materials on the market are manufactured by mold injection molding. During the injection molding process, the plastic solution is first heated to a molten state, and then the molten liquid is injected into the mold. When the molding cavity of the mold is filled, the cavity is cooled so that the molten liquid in the cavity is quickly cooled and formed, forming a plastic product corresponding to the molding cavity structure. Products made in this way can be used in a variety of fields.

[0003] In the SUV car structure, the A-pillar (front pillar) is located at the front windshield, the B-pillar (middle pillar) is located between the front and rear doors, and the C-pillar (rear pillar) is located at the triangular window. The above three pillars are made of high-strength alloy materials. While playing a supporting role, they also play a role in protecting the safety of people in the car. Therefore, in the outer shell structure of the car, a corresponding guard plate structure is set to wrap the above pillars inside. Since the outer shell of the car is mostly made of plastic raw materials, the guard plate part is also produced by injection molds.

[0004] However, the injection mold used for producing C-pillar guard plates in the prior art still has some shortcomings. Since the C-pillar is arranged at the rear of the car, an arc-shaped surface needs to be provided on the guard plate there for connecting with the trunk of the car. During the demolding process, the mold demolding mechanism in the prior art cannot completely eject the product from the mold, so that the product is firmly molded inside the cavity, causing demolding difficulties, thereby reducing production efficiency. Summary of the invention

[0005] The purpose of the utility model is to solve the problems existing in the prior art and to propose an automobile C-pillar guard plate injection mold with a reverse top structure. The technical problem to be solved by the utility model is: how to prevent the C-pillar guard plate from being firmly molded inside the cavity.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an automobile C-pillar guard plate injection mold with an inverted top structure, comprising a top plate, a foot plate, a fixed mold plate, a movable mold plate and a bottom plate arranged in sequence, a push plate that moves back and forth is provided on the inner side of the foot plate, a molding cavity is provided between the fixed mold plate and the movable mold plate, a cooling molded guard plate product is provided inside the molding cavity, a plurality of straight ejector pins and inclined ejector pins are provided on the push plate, a plurality of slidingly connected inclined ejector blocks are provided inside the fixed mold plate, one end of the inclined ejector pin is fixedly connected to the inclined ejector block, and the inclined ejector pin is fixedly connected to the inclined ejector block. The ejector block is arranged on one side of the forming cavity on the fixed template, and together with the fixed template forms a surface for forming the guard plate product. A plurality of anti-ejection mechanisms are arranged inside the side wall of the inclined ejector block, and the anti-ejection mechanism includes a side ejector pin whose one end can extend from the inside of the inclined ejector block, and the other end of the side ejector pin abuts against the fixed template. A corresponding ejector groove is arranged at the position where the fixed template abuts against the side ejector pin, and the ejector groove is deeper on the side away from the forming cavity and shallower on the side close to the forming cavity. The fixed template is also provided with a shrinkage groove, and the shrinkage groove is arranged directly above the ejector groove.

[0007] In the present scheme, after the fixed template and the movable template are opened, the formed guard plate product will be attached to the forming cavity of the fixed template. During the demoulding process, one side of the guard plate product is ejected upward by the inclined ejector block, and the rest of the part is directly ejected by the straight ejector pin. During the upward movement of the inclined ejector block, the internal side ejector pin will be driven to move upward together. Since the side ejector pin is close to the inside of the mold and abuts against the ejection groove, and the upper end of the ejection groove is shallow, the side ejector pin will be ejected outward by the ejection groove during the upward movement, so that the side edge of the guard plate product is separated from the surface on the inclined ejector block. When the inclined ejector block is completely ejected, the side ejector pin will move and sink into the shrinkage groove, so that the side ejector pin will retract on the side wall of the inclined ejector block, which is convenient for subsequent manual removal. In the above manner, during the ejection of the inclined ejector block from the inside of the fixed template, through the structure inside the fixed template, multiple side ejector pins can also be ejected from the side wall of the inclined ejector block, so that the guard plate product can be more fully separated from the inclined ejector block, avoiding the guard plate product being firmly molded on the forming surface of the inclined ejector block.

[0008] In the above-mentioned automobile C-pillar guard plate injection mold with an inverted ejector structure, the inclined ejector block is provided with a plurality of slide grooves, each of which is provided with a fixed slider, and the side ejector pins are respectively arranged inside the sliders and slidably connected with the sliders. The side ejector pins are installed in the slide groove structure, and the sliders play a role in supporting the side ejector pins so that the side ejector pins can slide out from the inclined ejector block.

[0009] In the above-mentioned automobile C-pillar guard plate injection mold with an inverted top structure, the guard plate product is provided with a triangular window mounting hole, one side of the guard plate product is a curved surface, the bottom of the guard plate product is provided with an arc hole, and the molding cavity is provided with a structure forming the above-mentioned guard plate product. The curved surface part of the guard plate product is a corner structure at the rear of the car, which is used to connect with the structure on the trunk. The curved surface is formed on the inclined ejector block, and the part is ejected by the side ejector pin. The arc hole is used to accommodate the wheel at the bottom.

[0010] In the above-mentioned automobile C-pillar guard plate injection mold with a reverse ejector structure, the push plate is provided with a plurality of first hydraulic cylinders fixedly connected thereto, and the first hydraulic cylinder is provided with a first piston rod, which passes through the push plate and abuts against the ejector plate. Since the first hydraulic cylinder is fixedly connected to the push plate, after the first piston rod is extended, the push plate can be driven to move upward, and the push plate drives the connected straight ejector pin and the inclined ejector pin to extend from the inside of the fixed mold plate, without the need for an external device to push the push plate to move.

[0011] In the above-mentioned automobile C-pillar guard plate injection mold with an inverted top structure, a support plate is provided on one side of the fixed template, and a plurality of second hydraulic cylinders are fixedly connected on the support plate. A second piston rod is provided on the second hydraulic cylinder. A slidingly connected forming block is provided inside the fixed template. The forming block and the fixed template together form a forming cavity, and the second piston rod is fixedly connected to the forming block. The forming block is used to form the structure on the side of the guard plate product. The second hydraulic cylinder drives the extension and contraction of the second piston rod, and the forming block can be pulled out from the side of the fixed template to avoid interference of the forming block with the demoulding of the guard plate product.

[0012] In the above-mentioned automobile C-pillar guard plate injection mold with an inverted top structure, a feed port is provided on the top plate, a diversion mechanism is provided inside the top plate, the feed port is connected to the diversion mechanism, and a plurality of connected nozzles are provided at the bottom of the diversion mechanism, and the nozzles extend through the foot plate and the fixed mold plate to the inside of the molding cavity. The plastic melt heated to a molten state is injected from the feed port, and after the diversion effect of the diversion mechanism, it is injected into the molding cavity from multiple nozzles to fill the inside of the molding cavity.

[0013] In the above-mentioned automobile C-pillar guard plate injection mold with an inverted ejector structure, a hinged slide seat is provided at the bottom of the inclined ejector pin, and the slide seat is fixedly connected to the push plate. The inclined ejector pin is hingedly connected to the push plate through the structure of the slide seat.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. In this scheme, during the process of the inclined ejector block being ejected from the inside of the fixed mold plate, multiple side ejector pins can be ejected and retracted from the side wall of the inclined ejector block through the ejection groove and contraction groove structure inside the fixed mold plate, so that the guard plate product can be more fully separated from the inclined ejector block, avoiding the guard plate product being firmly molded on the molding surface of the inclined ejector block.

[0016] 2. In this solution, the foot plate is arranged between the fixed mold plate and the push plate. Since the first hydraulic cylinder is fixedly connected to the push plate, after the first piston rod is extended, the push plate on the inner side of the foot plate can be driven to move upward, and the push plate drives the connected straight ejector pin and inclined ejector pin to extend from the inside of the fixed mold plate, without the need for an external device to push the push plate to move.

[0017] 3. In this solution, the forming block is used to form the structure on the side of the guard plate product. The second hydraulic cylinder drives the extension and retraction of the second piston rod, so that the forming block can be pulled out from the side of the fixed mold plate to avoid interference of the forming block with the demolding of the guard plate product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the half-section structure of the utility model when viewed from above;

[0020] Figure 3 It is a schematic diagram of the internal structure of the fixed template after the mold is opened and the partially enlarged structure of the utility model;

[0021] Figure 4 yes Figure 3 The cross-sectional structure and partial enlarged structural schematic diagram;

[0022] Figure 5 It is a schematic diagram of the structure of the guard plate product of the utility model.

[0023] In the figure, 1, ejector plate; 1a, feed port; 1b, diversion mechanism; 1c, nozzle; 2, fixed template; 2a, push plate; 2b, straight ejector pin; 2c, inclined ejector pin; 2c1, slide seat; 2d, first hydraulic cylinder; 2d1, first piston rod; 3, foot plate; 3a, support plate; 3b, second hydraulic cylinder; 3b1, second piston rod; 3c, forming block; 4, moving template; 5, bottom plate; 6, forming cavity; 7, inclined ejector block; 7a, side ejector pin; 7b, ejection groove; 7c, contraction groove; 7d, slide groove; 7d1, slider; 8, guard plate product; 8a, triangular window mounting hole; 8b, arc hole. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] Example

[0026] like Figure 1As shown, the automobile C-pillar guard plate injection mold with an inverted top structure includes a top plate 1, a foot plate 3, a fixed mold plate 2, a movable mold plate 4 and a bottom plate 5 arranged in sequence, the bottom plate 5 is fixedly connected to the movable mold plate 4, the fixed mold plate 2 is fixedly connected to the foot plate 3, the foot plate 3 is fixedly connected to the top plate 1, a reciprocating push plate 2a is provided on the inner side of the foot plate 3, a fixed support plate 3a is provided on one side of the fixed mold plate 2, and a feed port 1a is provided at the center of the top plate 1.

[0027] like Figure 2 As shown, a molding cavity 6 is provided between the fixed mold plate 2 and the movable mold plate 4, a diverter mechanism 1b is provided inside the top plate 1, the feed port 1a is connected to the diverter mechanism 1b, a connected nozzle 1c is provided at the bottom of the diverter structure, one end of the nozzle 1c passes through the push plate 2a and the fixed mold plate 2, and extends to the molding cavity 6, a plurality of fixedly connected straight ejector pins 2b are provided on the push plate 2a, and one end of the straight ejector pin 2b passes through the fixed mold plate 2 and extends to the molding cavity 6.

[0028] like Figure 3 As shown, the push plate 2a is provided with a plurality of first hydraulic cylinders 2d that are fixedly connected, the first hydraulic cylinder 2d is arranged toward one side of the top plate 1, and the side end is provided with a first piston rod 2d1, the first piston rod 2d1 passes through the push plate 2a and abuts against the top plate 1, one side of the fixed template 2 is provided with a slidably connected forming block 3c, a second hydraulic cylinder 3b is provided on the connecting plate, one end of the second hydraulic cylinder 3b is provided with a second piston rod 3b1, the second piston rod 3b1 is fixedly connected to the forming block 3c, a plurality of slidably connected inclined ejector blocks 7 are provided inside the fixed template 2, the upper surface of the inclined ejector block 7 is a curved surface structure, the inclined ejector block 7 is provided on one side of the forming cavity 6, the forming cavity 6 is formed by the fixed template 2, the movable template 4, the inclined ejector block 7, and the forming block 3c, and a plurality of side ejector pins 7a are provided inside the inclined ejector block 7.

[0029] like Figure 4 As shown, the push plate 2a is provided with a fixed slide seat 2c1, and the slide seat 2c1 is provided with an inclined ejector pin 2c which is hingedly connected. The inclined ejector pin 2c is fixedly connected to the inclined ejector block 7. The inclined ejector block 7 is provided with a plurality of slide grooves 7d inside. The slide grooves 7d are provided with fixed sliders 7d1 inside. The side ejector pins 7a are respectively arranged inside the sliders 7d1 and are slidably connected to the sliders 7d1. The inner end of the side ejector pin 7a abuts against the fixed template 2. The portion where the fixed template 2 abuts against the side ejector pin 7a is provided with a corresponding ejection groove 7b. The bottom side of the ejection groove 7b is deeper and the top side is shallower. The fixed template 2 is also provided with a contraction groove 7c, and the contraction groove 7c is arranged directly above the ejection groove 7b.

[0030] like Figure 5As shown, a cooling-molded guard plate product 8 is provided inside the molding cavity 6, a triangular window mounting hole 8a is provided on the guard plate product 8, one side of the guard plate product 8 is a curved surface, and the curved surface portion is molded on the inclined top block 7, an arc-shaped hole 8b is provided at the bottom of the guard plate product 8, and a structure for forming the above-mentioned guard plate product 8 is provided inside the molding cavity 6.

[0031] The working principle of this scheme is as follows: Figure 1-5 As shown, the plastic raw material heated to a molten state is injected into the injection mold through the feed port 1a, and after being diverted by the diverter mechanism 1b, it is injected into the molding cavity 6 from the nozzle 1c. When the molding cavity 6 is filled, the mold is cooled so that the molten liquid in the molding cavity 6 is quickly cooled and formed to form a guard plate product 8 corresponding to the structure of the molding cavity 6.

[0032] After the movable mold plate 4 is moved to open the mold by the mold opening mechanism, the second hydraulic cylinder 3b draws out the forming block 3c, and then the first hydraulic cylinder 2d extends the first piston rod 2d1 to push the push plate 2a to move upward, and the push plate 2a drives the connected straight ejector pin 2b and the inclined ejector pin 2c to extend from the inside of the fixed mold plate 2, and the inclined ejector block 7 is pushed upward by the inclined ejector pin 2c on the curved side of the guard plate product 8, and the rest of the parts are pushed upward by the straight ejector pin 2b. During the upward movement of the inclined ejector block 7, the internal side ejector pin 7a will be driven to move upward together. Since the side of the side ejector pin 7a close to the inside of the mold is in abutment against the ejection groove 7b, and the upper end of the ejection groove 7b is shallow, the side ejector pin 7a will be ejected outward by the ejection groove 7b during the upward movement, so that the side edge of the guard plate product 8 is separated from the surface of the inclined ejector block 7. When the inclined ejector block 7 is completely ejected, the side ejector pin 7a will move and sink into the shrinkage groove 7c, so that the side ejector pin 7a will retract on the side wall of the inclined ejector block 7, which is convenient for subsequent manual removal.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0034] Although this article uses more terms such as 1, ejector plate; 1a, feed port; 1b, diversion mechanism; 1c, nozzle; 2, fixed template; 2a, push plate; 2b, straight ejector pin; 2c, inclined ejector pin; 2c 1, slide seat; 2d, first hydraulic cylinder; 2d1, first piston rod; 3, foot plate; 3a, support plate; 3b, second hydraulic cylinder; 3b1, second piston rod; 3c, forming block; 4, moving template; 5, bottom plate; 6, forming cavity; 7, inclined ejector block; 7a, side ejector pin; 7b, ejection groove; 7c, shrinkage groove; 7d, slide groove; 7d1, slider; 8, guard plate product; 8a, triangular window mounting hole; 8b, arc hole, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An automobile C-pillar guard plate injection mold with an inverted top structure, comprising a top plate (1), a foot plate (3), a fixed mold plate (2), a movable mold plate (4) and a bottom plate (5) arranged in sequence, wherein a push plate (2a) is provided on the inner side of the foot plate (3) for reciprocating movement, a molding cavity (6) is provided between the fixed mold plate (2) and the movable mold plate (4), a cooling molded guard plate product (8) is provided inside the molding cavity (6), a plurality of straight ejector pins (2b) and inclined ejector pins (2c) are provided on the push plate (2a), a plurality of slidably connected inclined ejector blocks (7) are provided inside the fixed mold plate (2), one end of the inclined ejector pin (2c) is fixedly connected to the inclined ejector block (7), and the invention is characterized in that: The inclined ejector block (7) is arranged on one side of the forming cavity (6) on the fixed template (2), and together with the fixed template (2) forms a surface for forming the guard plate product (8). A plurality of anti-ejection mechanisms are arranged inside the side wall of the inclined ejector block (7), and the anti-ejection mechanism includes a side ejector pin (7a) one end of which can extend from the inside of the inclined ejector block (7), and the other end of the side ejector pin (7a) abuts against the fixed template (2). A corresponding ejection groove (7b) is arranged at the position where the fixed template (2) abuts against the side ejector pin (7a), and the ejection groove (7b) is deeper on the side away from the forming cavity (6) and shallower on the side close to the forming cavity (6). The fixed template (2) is also provided with a shrinkage groove (7c), and the shrinkage groove (7c) is arranged directly above the ejection groove (7b).

2. The injection mold for the automobile C-pillar guard plate with an inverted top structure according to claim 1, characterized in that: The inclined ejector block (7) is provided with a plurality of slide grooves (7d) inside, each of which is provided with a fixedly connected slider (7d1), and the side ejector pins (7a) are respectively arranged inside the slider (7d1) and are slidably connected to the slider (7d1).

3. The injection mold for the automobile C-pillar guard plate with an inverted top structure according to claim 1, characterized in that: The guard plate product (8) is provided with a triangular window mounting hole (8a), one side of the guard plate product (8) is a curved surface, the bottom of the guard plate product (8) is provided with an arc hole (8b), and the molding cavity (6) is provided with a structure for forming the guard plate product (8).

4. The injection mold for the automobile C-pillar guard plate with an inverted top structure according to claim 1, characterized in that: The push plate (2a) is provided with a plurality of first hydraulic cylinders (2d) which are fixedly connected thereto. The first hydraulic cylinder (2d) is provided with a first piston rod (2d1). The first piston rod (2d1) passes through the push plate (2a) and abuts against the top plate (1).

5. The injection mold for the automobile C-pillar guard plate with an inverted top structure according to claim 4, characterized in that: A support plate (3a) is provided on one side of the fixed mold plate (2), a plurality of second hydraulic cylinders (3b) are fixedly connected to the support plate (3a), a second piston rod (3b1) is provided on the second hydraulic cylinder (3b), a slidably connected forming block (3c) is provided inside the fixed mold plate (2), the forming block (3c) and the fixed mold plate (2) together form a forming cavity (6), and the second piston rod (3b1) is fixedly connected to the forming block (3c).

6. The injection mold for the automobile C-pillar guard plate with an inverted top structure according to claim 1, characterized in that: The top plate (1) is provided with a feed port (1a), a flow diversion mechanism (1b) is provided inside the top plate (1), the feed port (1a) is connected to the flow diversion mechanism (1b), a plurality of connected nozzles (1c) are provided at the bottom of the flow diversion mechanism (1b), and the nozzles (1c) pass through the foot plate (3) and the fixed mold plate (2) and extend into the interior of the molding cavity (6).

7. The injection mold for the automobile C-pillar guard plate with an inverted top structure according to claim 1, characterized in that: A hinged sliding seat (2c1) is provided at the bottom of the inclined ejector pin (2c), and the sliding seat (2c1) is fixedly connected to the push plate (2a).

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