Three-time ejection mechanism of automobile rear bumper injection mold

Abstract

The utility model relates to a three-time ejection mechanism of an automobile rear bumper injection mold, and belongs to the technical field of injection molds. Comprising a top plate, a fixed mold plate, a movable mold plate, a foot plate and a bottom plate, a lower push plate and an upper push plate which do reciprocating motion are arranged on the inner side of the foot plate, a first angle ejector rod is arranged at the bottom of large angle ejectors and hinged to the lower push plate, the inclination directions of the large angle ejectors on the two sides and the first angle ejector rod face the inner side of the mold, and a straight ejector rod is arranged below the large straight ejector and fixedly connected with the lower push plate. A second angle ejector rod is arranged below the small angle ejector and is hinged with the upper push plate; according to the scheme, the upper push plate and the lower push plate are ejected for three times, partial separation is carried out firstly, and then overall separation is carried out, so that a rear bumper product can be completely separated from the mold, and the product is prevented from being strained in the demolding process.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a three-time ejection mechanism of an injection mold for a rear bumper of an automobile. Background Art

[0002] Most of the products made of plastic materials on the market are produced by injection molds, and the rear bumper of the car, as a kind of plastic product, is also mainly produced by injection molds.

[0003] Due to the large size of the rear bumper of the car, in the mold production of the prior art, the product is directly ejected through the ejector structure, which easily causes insufficient demoulding, causes damage to the product, and reduces the production yield. Summary of the invention

[0004] The utility model aims to solve the problems existing in the prior art and proposes a three-time ejection mechanism for an automobile rear bumper injection mold. The technical problem to be solved by the utility model is: how to avoid damage to the automobile rear bumper product during the demoulding process.

[0005] The object of the utility model can be achieved through the following technical scheme: a three-time ejection mechanism of an injection mold for a rear bumper of an automobile, comprising a top plate, a fixed mold plate, a movable mold plate, a foot plate and a bottom plate, characterized in that large inclined tops slidably connected are provided on both sides of the fixed mold plate, a large straight top is provided above the fixed mold plate, a plurality of small inclined tops are provided inside the large straight top, the large inclined top and the large straight top are arranged between the movable mold plate and the fixed mold plate, an injection cavity is provided at the connection between the large inclined top and the large straight top and the fixed mold plate, a reciprocating lower push plate and an upper push plate are provided on the inner side of the foot plate, a first inclined top rod is provided at the bottom of the large inclined top, the first inclined top rod is hingedly connected to the lower push plate, the inclination directions of the large inclined top and the first inclined top rod on both sides are toward the inner side of the mold, a straight top rod is provided below the large straight top, the straight top rod is fixedly connected to the lower push plate, a second inclined top rod is provided below the small inclined top, and the second inclined top rod is hingedly connected to the upper push plate.

[0006] In this solution, the injection cavity is a closed cavity, and the injection cavity is used to mold the rear bumper product. The upper surface of the injection cavity is composed of the bottom surface of the fixed mold plate, and the lower surface is composed of a large slanted top and a large straight top, which are movably arranged between the fixed mold plate and the movable mold plate. After the movable mold plate and the fixed mold plate are opened and separated, the rear bumper product will be attached to the large slanted top and the large straight top. At this time, the lower push plate is ejected for the first time, and the lower push plate drives the first inclined ejector rod, the straight ejector rod and the upper push plate to move upward together. The large straight ejector rod moves vertically upward under the action of the straight ejector rod. Since the large inclined ejector rod and the first inclined ejector rod are inclined toward the inside of the mold, the large inclined ejector rod moves toward the middle of the mold during the ejection process to prevent the rear bumper product from being damaged. The large inclined ejectors on both sides pull the rear bumper product toward the middle, so that the rear bumper product can be separated from the front mold; after the front mold is separated, the lower push plate is ejected for the second time, and the large inclined ejectors on both sides continue to move toward the middle, so that the rear bumper product can be separated from the large inclined ejectors upward; the upper push plate is ejected separately for the third time, so that the small inclined ejectors connected to the upper push plate are ejected upward, so that the rear bumper product can be completely separated from the large straight ejector rod, which is convenient for automatic or manual removal. In the above manner, during the demolding process, the upper and lower push plates are ejected three times, first partially separated, and then completely separated, so that the rear bumper product can be completely separated from the mold, avoiding damage to the product during the demolding process.

[0007] In the three-time ejection mechanism of the above-mentioned automobile rear bumper injection mold, the inclination direction of the large inclined ejectors on both sides is toward the inside of the mold, and sliders are provided on both sides of the connection between the movable mold plate and the large inclined ejectors, and the large inclined ejectors are provided with slide rails corresponding to the sliders, and the sliders are slidably connected with the slide rails. The sliders cooperate with the slide rails to prevent the large inclined ejectors from deflecting during the ejection process and play a guiding role.

[0008] In the three-time ejection mechanism of the above-mentioned automobile rear bumper injection mold, a diverter plate is provided between the top plate and the fixed mold plate, an injection port is provided on the top plate, a diverter flow channel is provided inside the diverter plate, and the bottom of the injection port is connected to the diverter flow channel. The injection raw material enters from the injection port and flows into the diverter flow channel inside the diverter plate, and the diverter plate plays a role of diversion.

[0009] In the above three-time ejection mechanism of the automobile rear bumper injection mold, a plurality of main nozzles are arranged at the bottom of the diverter plate, the top of the main nozzle is connected to the diverter channel, and the bottom of the main nozzle is connected to the injection cavity at the large straight top. After the diversion effect of the diverter plate, the injection raw material is injected into the injection cavity at the large straight top from the main nozzle connected at the bottom.

[0010] In the above three-time ejection mechanism of the automobile rear bumper injection mold, the bottoms of both sides of the diverter plate are connected with side nozzles, and the bottom ends of the side nozzles are connected to the injection cavity at the large inclined top. The side nozzles are provided on both sides of the mold so that the injection material can be directly injected into the injection cavity at the large inclined top from the side nozzles on both sides, thereby increasing the speed of filling the injection cavity with the injection material and shortening the mold production time.

[0011] In the above-mentioned three-time ejection mechanism of the automobile rear bumper injection mold, the bottom end of the first inclined ejector rod is provided with a hinged first slide seat, the first slide seat is fixedly connected to the lower push plate, and the bottom of the second inclined ejector rod is provided with a hinged second slide seat, the second slide seat is fixedly connected to the upper push plate. Since the first inclined ejector rod and the second inclined ejector rod are obliquely arranged inside the mold, it is necessary to increase a degree of freedom at their bottom, so they are connected to the lower push plate and the upper push plate through the structure of the first slide seat and the second slide seat.

[0012] In the above three-time ejection mechanism of the automobile rear bumper injection mold, a plurality of sliding guide pillars are provided on the inner side of the foot plate, and the two ends of the sliding guide pillars are respectively fixedly connected to the fixed mold plate and the bottom plate, and the sliding guide pillars pass through the inside of the upper push plate and the lower push plate, and are slidably connected with the upper push plate and the lower push plate. The sliding guide pillars play a guiding role in the structure, so that the upper push plate and the lower push plate can stably reciprocate on the inner side of the foot plate.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. In the demoulding process of this scheme, the upper and lower push plates are ejected three times, first partially and then completely, so that the rear bumper product can be completely separated from the mold, avoiding damage to the product during the demoulding process.

[0015] 2. In this scheme, side nozzles are opened on both sides of the mold, so that the injection molding material can be directly injected into the injection molding cavity at the large inclined top from the side nozzles on both sides, thereby increasing the speed of filling the injection molding cavity with the injection molding material and shortening the mold production time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a left-side half-section structural schematic diagram of the injection mold of the utility model;

[0017] Figure 2 It is a left-side cross-sectional structural schematic diagram of the injection mold of the utility model;

[0018] Figure 3 This is a front view half-section structural schematic diagram of the injection mold of the utility model;

[0019] Figure 4 It is a front cross-sectional structural schematic diagram of the injection mold of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure on the movable template after the utility model is ejected three times.

[0021] In the figure, 1, top plate; 1a, injection port; 1b, diverter plate; 1b1, diverter channel; 1c, side nozzle; 1d, main nozzle; 2, fixed mold plate; 3, movable mold plate; 3a, slider; 4, foot plate; 4a, lower push plate; 4b, upper push plate; 5, bottom plate; 6, large inclined top; 6a, slide rail; 6b, first inclined top rod; 6c, first slide seat; 7, large straight top; 7a, small inclined top; 7b, second inclined top rod; 7c, second slide seat; 7d, straight top rod; 8, injection cavity; 9, sliding guide column. DETAILED DESCRIPTION

[0022] 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.

[0023] Example

[0024] like Figure 1 As shown, the three-time ejection mechanism of the injection mold for the rear bumper of the automobile comprises, from top to bottom, a top plate 1, a fixed mold plate 2, a movable mold plate 3, a foot plate 4 and a bottom plate 5 arranged on one side, a diverter plate 1b is provided between the top plate 1 and the fixed mold plate 2, an injection port 1a is provided on the top plate 1, and the bottom of the injection port 1a is connected to the injection port 1a provided inside the diverter plate 1b, large inclined tops 6 are provided on both sides of the connection between the fixed mold plate 2 and the movable mold plate 3, a large straight top 7 is provided above the large inclined top 6, the large inclined top 6 and the large straight top 7 are slidably connected on the movable mold plate 3, and the large inclined top 6 and the large straight top 7 are provided at the connection surface with the fixed mold plate 2 There is an injection cavity 8, a slide rail 6a is provided on one side of the large inclined top 6, a slider 3a corresponding to the slide rail 6a is provided on the movable template 3, and the slider 3a is fixedly connected to the movable template 3, so that the large inclined top 6 is slidably connected to the side of the fixed template 2, the large inclined top 6 is inclined toward the center of the mold, and a plurality of small inclined tops 7a are provided inside the large straight top 7, and a lower push plate 4a, an upper push plate 4b and a sliding guide column 9 are provided inside the foot plate 4, and the two ends of the sliding guide column 9 are respectively fixedly connected to the movable template 3 and the bottom plate 5, and the sliding guide column 9 passes through the upper push plate 4b and the lower push plate 4a, and is slidably connected to the upper push plate 4b and the lower push plate 4a.

[0025] like Figure 2 Combination Figure 3As shown, a plurality of main nozzles 1d and side nozzles 1c are provided below the diverter plate 1b, the bottom end of the main nozzle 1d is connected to the injection cavity 8 at the large straight top 7, the side nozzle 1c is connected to the injection cavity 8 at the large inclined top 6, the bottom of the large inclined top 6 is provided with a fixed first inclined top rod 6b, the bottom of the first inclined top rod 6b is provided with a hinged first slide seat 6c, the first slide seat 6c is fixedly connected to the lower push plate 4a, and a fixed straight top rod 7d is provided below the large straight top 7, the bottom end of the straight top rod 7d passes through the upper push plate 4b and is fixedly connected to the lower push plate 4a.

[0026] like Figure 4 As shown, a second inclined lift rod 7b is fixedly provided below the small inclined lift 7a, and a hinged second slide seat 7c is provided at the bottom of the second inclined lift rod 7b, and the second slide seat 7c is fixedly connected to the upper push plate 4b.

[0027] like Figure 5 As shown, after the lower push plate 4a and the upper push plate 4b are pushed upward, the large inclined ejectors 6 on both sides move toward the middle of the mold, and after the upper push plate 4b is pushed out alone, the small inclined ejectors 7a inside the large straight ejectors 7 will extend from the inside.

[0028] The working principle of this scheme is as follows: Figure 1-5 As shown, after the injection molding raw material is heated to a molten state, it flows from the injection port 1a into the diverter plate 1b, and after the diversion effect of the injection port 1a, it is injected into the cavity at the large inclined top 6 and the straight top block from the side nozzle 1c and the main nozzle 1d set at the bottom of the diverter plate 1b, respectively, so that the injection molding cavity 8 can be quickly filled. After waiting for the mold to cool and form inside, the mold is opened through the mold opening mechanism. After the movable mold plate 3 and the fixed mold plate 2 are opened and separated, the rear bumper product will be attached to the large inclined top 6 and the large straight top 7.

[0029] By ejecting the lower push plate 4a for the first time, the lower push plate 4a drives the first inclined push rod 6b, the straight push rod 7d and the upper push plate 4b to move upward for a distance, and the large straight push rod 7 moves vertically upward under the action of the straight push rod 7d. Since the large inclined push rod 6 and the first inclined push rod 6b are inclined toward the inside of the mold, the large inclined push rod 6 moves toward the middle of the mold during the ejection process, and the large inclined push rods 6 on both sides pull the rear bumper product toward the middle, so that the rear bumper product can be separated from the front mold; after the front mold is separated, the lower push plate 4a is ejected for the second time, and the large inclined push rods 6 on both sides continue to move toward the middle, so that the rear bumper product can be separated from the large inclined push rod 6 upward; the upper push plate 4b is ejected alone for the third time, so that the small inclined push rod 7a connected to the upper push plate 4b is ejected upward, so that the rear bumper product can be completely separated from the large straight push rod 7, which is convenient for automatic or manual removal.

[0030] In this solution, by ejecting the upper and lower push plates 4a three times, first partially detaching and then completely detaching, the rear bumper product can be completely detached from the mold, avoiding damage to the product during the demoulding process.

[0031] 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.

[0032] Although this article uses more terms such as 1, top plate; 1a, injection port; 1b, diverter plate; 1b1, diverter channel; 1c, side nozzle; 1d, main nozzle; 2, fixed template; 3, moving template; 3a, slider; 4, foot plate; 4a, lower push plate; 4b, upper push plate; 5, bottom plate; 6, large inclined top; 6a, slide rail; 6b, first inclined top rod; 6c, first slide seat; 7, large straight top; 7a, small inclined top; 7b, second inclined top rod; 7c, second slide seat; 7d, straight top rod; 8, injection cavity; 9, sliding guide column, 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. A three-time ejection mechanism for an automobile rear bumper injection mold, comprising an ejector plate (1), a fixed mold plate (2), a movable mold plate (3), a foot plate (4) and a bottom plate (5), characterized in that: Large slanted tops (6) in sliding connection are provided on both sides of the fixed mold plate (2); a large straight top (7) is provided above the fixed mold plate (2); a plurality of small slanted tops (7a) are provided inside the large straight top (7); the large slanted top (6) and the large straight top (7) are arranged between the movable mold plate (3) and the fixed mold plate (2); an injection cavity (8) is provided at the connection between the large slanted top (6) and the large straight top (7) and the fixed mold plate (2); and a reciprocating lower push plate (4a) and an upper push plate (4b) are provided on the inner side of the foot plate (4). A first inclined ejector rod (6b) is provided at the bottom of the large inclined ejector (6), and the first inclined ejector rod (6b) is hingedly connected to the lower push plate (4a). The inclination direction of the large inclined ejector (6) and the first inclined ejector rod (6b) on both sides is toward the inner side of the mold. A straight ejector rod (7d) is provided below the large straight ejector (7), and the straight ejector rod (7d) is fixedly connected to the lower push plate (4a). A second inclined ejector rod (7b) is provided below the small inclined ejector (7a), and the second inclined ejector rod (7b) is hingedly connected to the upper push plate (4b).

2. The three-time ejection mechanism of the automobile rear bumper injection mold according to claim 1, characterized in that: Slide blocks (3a) are provided on both sides of the connection between the movable template (3) and the large inclined top (6); a slide rail (6a) corresponding to the slide block (3a) is provided on the large inclined top (6); and the slide block (3a) is slidably connected to the slide rail (6a).

3. The three-time ejection mechanism of the automobile rear bumper injection mold according to claim 1, characterized in that: A flow divider plate (1b) is provided between the top plate (1) and the fixed mold plate (2); an injection port (1a) is provided on the top plate (1); a flow divider channel (1b1) is provided inside the flow divider plate (1b); and the bottom of the injection port (1a) is connected to the flow divider channel (1b1).

4. The three-time ejection mechanism of the automobile rear bumper injection mold according to claim 3, characterized in that: A plurality of main nozzles (1d) are provided at the bottom of the flow dividing plate (1b); the top of the main nozzle (1d) is connected to the flow dividing channel (1b1); and the bottom of the main nozzle (1d) is connected to the injection cavity (8) at the large straight top (7).

5. The three-time ejection mechanism of the automobile rear bumper injection mold according to claim 4, characterized in that: The bottoms of both sides of the diverter plate (1b) are connected to side nozzles (1c), and the bottom ends of the side nozzles (1c) are connected to the injection molding cavity (8) at the large inclined top (6).

6. The three-time ejection mechanism of the automobile rear bumper injection mold according to claim 1, characterized in that: A hinged first slide seat (6c) is provided at the bottom end of the first inclined push rod (6b), and the first slide seat (6c) is fixedly connected to the lower push plate (4a); a hinged second slide seat (7c) is provided at the bottom of the second inclined push rod (7b), and the second slide seat (7c) is fixedly connected to the upper push plate (4b).

7. The three-time ejection mechanism of the automobile rear bumper injection mold according to claim 1, characterized in that: A plurality of sliding guide pillars (9) are provided on the inner side of the foot plate (4), and the two ends of the sliding guide pillars (9) are respectively fixedly connected to the fixed mold plate (2) and the bottom plate (5). The sliding guide pillars (9) pass through the interior of the upper push plate (4b) and the lower push plate (4a) and are slidably connected to the upper push plate (4b) and the lower push plate (4a).

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