Bottom support injection mold with oblique ejection demolding function

Abstract

The utility model relates to a cork base injection mold for oblique ejection demolding, and belongs to the technical field of injection molds. Comprising a fixed mold plate, a movable mold plate, a foot plate and a bottom plate, a sliding groove is formed in a pitched roof block, an ejector pin capable of extending out of the outer side wall of the pitched roof block is arranged in the sliding groove, an abutting portion is arranged at the end, close to the inner side of the sliding groove, of the ejector pin, a chute is formed in the movable mold plate and is of a structure with the narrow upper portion and the wide lower portion, and the end of the abutting portion penetrates out of the sliding groove and abuts against the inner wall of the chute. A reset spring is arranged on the outer side of the ejector pin, and the two ends of the reset spring abut against the end of the sliding groove and one side of the abutting part respectively. According to the scheme, the ejector pin in the sliding groove obliquely moves upwards along with the sliding groove, when the ejector pin moves, the end, provided with the abutting part, of the ejector pin abuts against the inner wall of the inclined groove, the ejector pin can be gradually ejected out towards one side of the side cavity, a buckle formed in the side cavity is demolded from the inclined sliding block, the buckle cannot be pulled in the process that the inclined sliding block continues to be ejected out, and therefore the buckle cannot be damaged. And the situation that waste products appear in the production process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a bottom support injection mold with oblique ejection and demoulding. Background Art

[0002] The base plate is a plastic sheet installed at the front of an electric vehicle. It connects the front and body of the vehicle, and the upper end of the base plate is used to mount pedals, allowing users to rest their feet during riding. Therefore, the base plate plays a vital role in electric vehicles. Because the base plate is made of plastic, it is typically manufactured using injection molds.

[0003] In the production process of the injection mold of the existing technology, the plastic raw material is first heated to a molten state, and then the melt is injected into the molding cavity of the mold. After the melt fills the molding cavity and cools and forms, a bottom support plate product corresponding to the molding cavity structure will be formed. The mold is then opened for demoulding, and the molded bottom support plate is ejected from the mold to complete the manufacturing of the bottom support plate.

[0004] However, the injection mold of the existing technology still has some shortcomings in the process of producing the bottom support plate. Since the top of both sides of the bottom support plate needs to be installed and connected with the foot pedal, multiple snap-in structures need to be set on both sides. During the demolding process, the bottom support plate is directly ejected using an inclined ejector, which easily causes the snap-in to break, thereby reducing production efficiency. Summary of the Invention

[0005] The purpose of the utility model is to solve the problems existing in the existing technology and propose a bottom support injection mold with oblique ejection and demoulding. The technical problem to be solved by the utility model is: how to effectively demould the bottom support plate in the injection mold.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a bottom support injection mold with oblique ejection, comprising a fixed template, a movable template, a foot plate and a bottom plate, a molding cavity is provided between the fixed template and the movable template, an injection molding bottom support plate is provided inside the molding cavity, a reciprocating push plate is provided on the inner side of the foot plate, a plurality of fixedly connected inclined ejector rods are provided on the push plate, a plurality of inclined ejector blocks fixedly connected to the inclined ejector rods are provided inside the movable template, the inclined ejector blocks are provided on both sides of the molding cavity and inclined toward the center of the molding cavity, A side cavity is provided on the outer wall of the inclined ejector block, and the side cavity is connected to the forming cavity. A slide groove is provided inside the inclined ejector block, and a pin that can extend from the outer wall of the inclined ejector block is provided inside the slide groove. An end of the pin close to the inner side of the slide groove is provided with a supporting portion. An inclined groove is provided on the movable template, and the inclined groove has a structure that is narrow at the top and wide at the bottom. The end of the supporting portion passes through the slide groove and abuts against the inner wall of the inclined groove. A return spring is provided on the outside of the ejector pin, and the two ends of the return spring respectively abut against the end of the slide groove and one side of the abutting portion.

[0007] In this solution, a chute is provided inside the inclined slider. During the demolding process of the inclined slider, the ejector pin inside the chute moves upward along with the chute. As the ejector pin moves, the end with the abutment portion abuts against the inner wall of the chute. Since the chute is narrow at the top and wide at the bottom, the ejector pin will gradually be ejected toward one side of the side cavity, allowing the structure formed in the side cavity to be demolded from the inclined slider. As the inclined slider continues to be ejected, it will not pull on the structure of the side cavity, thus avoiding the occurrence of waste during the production process and improving production efficiency. After demolding is completed, the inclined ejector block moves down and back into the movable mold plate. The ejector pin, pushed by the elastic force of the return spring, retracts the portion extending out of the inclined ejector block back into the inclined ejector block, waiting for demolding after the next round of injection molding is completed.

[0008] In the aforementioned base support injection mold with oblique ejection, a stopper is provided at the junction of the inclined ejector block and the inclined slot. Bolts are provided on the stopper to securely connect the two blocks, and the bottom of the abutment portion abuts against the stopper. The stopper is bolted to the inclined ejector block. During the return of the ejector pin, when the ejector pin, propelled by the return spring, moves to the innermost side of the slot, the bottom of the abutment portion abuts against the stopper. This prevents the ejector pin from further inward movement after reaching the desired position, thus preventing the formation of an inwardly concave groove on the inclined ejector block, which could affect the appearance of the molded product.

[0009] In the aforementioned oblique ejection mold for the base support, the base support plate is provided with a plurality of clips on both sides. These clips are integrally formed with the base support plate within a side cavity. A side window is provided on one side of the base support plate. The clip structure formed within the side cavity is used to connect to the aforementioned footrest structure. A side window is provided on one side of the base support plate for mounting a device that connects to the internal side structure.

[0010] In the aforementioned slanted ejection mold for the base support, a sliding block is provided on one side of the movable platen. A molding portion for forming the side window structure is provided on the side of the slider proximate the molding cavity. This molding portion extends into the molding cavity. During the injection molding process, the side window structure is formed by the molding portion moving into the molding cavity, thereby blocking the interior of the molding cavity.

[0011] In the aforementioned oblique ejection base injection mold, a guide groove is provided at the top of the slider, and a guide post is fixedly attached to the fixed platen. The post is arranged obliquely toward the exterior of the mold and is inserted into and slidably connected to the guide groove. During the mold opening process, the movable platen is moved to open the mold, while the guide post on the fixed platen remains stationary. The guide groove, guided by the guide post, causes the slider to move outward, and the molding cavity on the slider is simultaneously withdrawn from the molding cavity.

[0012] In the aforementioned bottom support injection mold with oblique ejection, a feed port is located at the top of the fixed platen, the bottom of which is connected to the molding cavity. The push plate is also equipped with several fixedly connected straight ejector rods and a slide. The tops of the straight ejector rods extend to the bottom of the molding cavity, and the bottoms of the inclined ejector rods are hingedly connected to the slide. Molten plastic is injected into the molding cavity from the feed port. The push plate is pushed, driving the straight ejector rods and inclined ejector block from the interior of the movable platen, thereby ejecting the bottom support product.

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

[0014] 1. In this solution, during the demoulding and ejection process of the inclined slider, the ejector pin inside the chute moves obliquely upward along with the chute. When the ejector pin moves, the end provided with the abutment portion abuts against the inner wall of the inclined chute, and the ejector pin is gradually ejected toward one side of the side cavity, so that the buckle structure formed in the side cavity is demoulded with the inclined slider. During the continued ejection process of the inclined slider, the buckle will not be pulled, thereby avoiding the occurrence of waste in the production process and improving production efficiency.

[0015] 2. In this solution, after demoulding is completed, the inclined ejector block moves down back into the movable template. Under the elastic force of the return spring, the ejector pin retracts the part extending out of the inclined ejector block back into the inclined ejector block. When the ejector pin moves to the innermost side of the slide groove, the bottom of the abutting portion abuts against the limit block, so that the ejector pin will not continue to move inward after reaching the appropriate position, thereby avoiding the formation of an inwardly concave groove on the inclined ejector block, which affects the appearance of the molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal half-section structure of the inclined top block of the utility model;

[0018] Figure 3 yes Figure 2 A schematic diagram of the partial enlarged structure of the ejector pin;

[0019] Figure 4 This is a schematic diagram of the internal half-section structure of the slider of the utility model;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the bottom supporting plate of the utility model.

[0021] In the figure, 1, fixed template; 1a, guide column; 1b, feed port; 2, movable template; 2a, inclined ejector block; 2a1, limit block; 2a2, bolt; 2b, inclined groove; 2c, slider; 2c1, forming part; 2c2, guide groove; 3, foot plate; 3a, push plate; 3b, inclined ejector rod; 3c, slide seat; 3d, straight ejector rod; 4, bottom plate; 5, forming cavity; 5a, side cavity; 6, slide groove; 7, ejector pin; 7a, abutment part; 7b, return spring; 8, bottom support plate; 8a, buckle; 8b, side window. 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 bottom support injection mold with oblique ejection and demoulding includes a fixed mold plate 1, a movable mold plate 2, a foot plate 3 and a bottom plate 4. A reciprocating push plate 3a is provided inside the foot plate 3, and a feed port 1b is provided on the top plate.

[0025] like Figure 2 Combine Figure 3 As shown, a forming cavity 5 is provided between the fixed template 1 and the movable template 2, the bottom of the feed port 1b is connected to the forming cavity 5, a plurality of fixed slides 3c and straight push rods 3d are provided on the push plate 3a, the straight push rods 3d extend to the bottom of the forming cavity 5, a hinged inclined push rod 3b is provided on the slide 3c, the inclined push rod 3b is provided on both sides of the push plate 3a, a sliding connection inclined slider 2c is provided inside the movable template 2, the bottom of the inclined slider 2c is fixedly connected to the inclined push rod 3b, the inclined push rod 3b and the inclined push rod 3b are inclined toward the center of the forming cavity 5, a side cavity 5a is provided on the outer wall of the inclined push block 2a, the side cavity 5a is connected to the forming cavity 5, and a slide groove 6 is provided inside the inclined push block 2a. , the inside of the slide groove 6 is provided with a pin 7 that can extend from the outer wall of the inclined ejector block 2a, and the end of the pin 7 close to the inner side of the slide groove 6 is provided with a supporting portion 7a, and the movable template 2 is provided with an inclined groove 2b, and the inclined groove 2b has a structure that is narrow at the top and wide at the bottom. The end of the supporting portion 7a passes through the slide groove 6 and abuts against the inner wall of the inclined groove 2b, and a return spring 7b is provided on the outside of the pin 7, and the two ends of the return spring 7b respectively abut against the end of the slide groove 6 and one side of the abutting portion 7a, and a limit block 2a1 is provided at the connection between the inclined ejector block 2a and the inclined groove 2b. A bolt 2a2 is provided on the limit block 2a1 to fix the limit block 2a1 to the inclined ejector block 2a, and the bottom of the abutting portion 7a abuts against the limit block 2a1.

[0026] like Figure 4 Combine Figure 5As shown, an injection molding bottom support plate 8 is provided in the molding cavity 5, and a plurality of clips 8a are provided on both sides of the bottom support plate 8. The clips 8a are integrally formed with the bottom support plate 8 in the side cavity 5a. A side window 8b is provided on one side of the bottom support plate 8, and a sliding slider 2c is provided on one side of the movable template 2. A molding portion 2c1 for forming a side window 8b structure is provided on the side of the slider 2c close to the molding cavity 5. The molding portion 2c1 extends into the interior of the molding cavity 5, and a guide groove 2c2 is provided on the top of the slider 2c. A fixed guide column 1a is provided on the fixed template 1, and the guide column 1a is obliquely arranged to the outside of the mold. The guide column 1a is inserted into the guide groove 2c2 and slidably connected.

[0027] The working principle of this scheme is as follows: Figure 1-5 As shown, the plastic melt heated to a molten state is injected into the molding cavity 5 from the feed port 1b. After the molding cavity 5 and the side cavity 5a are filled, the mold is cooled to allow the internal plastic melt to cool quickly and form. After forming, the movable plate 2 is moved to open the mold. The slider 2c on the movable plate 2 moves outward under the guidance of the guide column 1a, so that the molding part 2c 1 is pulled out from the molding cavity 5, and then the movable template 2 is pushed for demoulding. The push plate 3a drives the straight ejector rod 3d to be ejected directly upward, and drives the inclined ejector rod 3b to eject the inclined ejector block 2a obliquely from the movable template 2. During the movement of the inclined ejector block 2a, the ejector pin 7 inside the slide groove 6 moves obliquely upward along with the slide groove 6. When the ejector pin 7 moves, one end of the ejector pin 7 with the abutment portion 7a will abut against the inner wall of the inclined groove 2b. Since the inclined groove 2b is a structure that is narrow at the top and wide at the bottom, the ejector pin 7 will gradually be ejected toward one side of the side cavity 5a, so that the clip 8a formed in the side cavity 5a is demoulded with the inclined slider 2c. When the inclined slider 2c continues to eject, it will not pull the clip 8a, thereby avoiding the occurrence of waste in the production process and improving production efficiency.

[0028] After demoulding is completed, the inclined ejector block 2a moves down back into the movable template 2, and the ejector pin 7 is pushed by the elastic force of the return spring 7b so that the part extending out of the inclined ejector block 2a retracts into the inclined ejector block 2a. When the ejector pin 7 moves to the innermost side of the slide groove 6, the bottom of the abutment portion 7a abuts against the limit block 2a1, so that the ejector pin 7 will no longer move inward after reaching the appropriate position, avoiding the formation of an inwardly concave groove on the inclined ejector block 2a, which affects the appearance of the molded product.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0030] Although this article frequently uses terms such as 1. fixed plate; 1a. guide column; 1b. feed port; 2. movable plate; 2a. inclined ejector block; 2a1. limit block; 2a2. bolt; 2b. inclined slot; 2c. slider; 2c1. forming portion; 2c2. guide slot; 3. foot plate; 3a. push plate; 3b. inclined ejector pin; 3c. slide seat; 3d. straight ejector pin; 4. bottom plate; 5. forming cavity; 5a. side cavity; 6. slide slot; 7. ejector pin; 7a. abutment portion; 7b. return spring; 8. bottom support plate; 8a. buckle; 8b. side window, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A bottom support injection mold with oblique ejection and demoulding, comprising a fixed mold plate (1), a movable mold plate (2), a foot plate (3) and a bottom plate (4), a molding cavity (5) is provided between the fixed mold plate (1) and the movable mold plate (2), an injection molding bottom support plate (8) is provided inside the molding cavity (5), a reciprocating push plate (3a) is provided on the inner side of the foot plate (3), a plurality of fixedly connected inclined ejector rods (3b) are provided on the push plate (3a), a plurality of inclined ejector blocks (2a) fixedly connected to the inclined ejector rods (3b) are provided inside the movable mold plate (2), the inclined ejector blocks (2a) are provided on both sides of the molding cavity (5) and are inclined toward the center of the molding cavity (5), characterized in that: A side cavity (5a) is provided on the outer wall of the inclined ejector block (2a), and the side cavity (5a) is connected to the forming cavity (5). A slide groove (6) is provided inside the inclined ejector block (2a), and a pin (7) is provided inside the slide groove (6) that can extend from the outer wall of the inclined ejector block (2a). An end of the pin (7) close to the inner side of the slide groove (6) is provided with a supporting portion (7a). An inclined groove (2b) is provided on the movable template (2), and the inclined groove (2b) has a structure that is narrow at the top and wide at the bottom. The end of the supporting portion (7a) passes through the slide groove (6) and abuts against the inner wall of the inclined groove (2b). A return spring (7b) is provided on the outer side of the pin (7), and the two ends of the return spring (7b) respectively abut against the end of the slide groove (6) and one side of the abutting portion (7a).

2. The bottom support injection mold with oblique ejection and demoulding according to claim 1, characterized in that: A limit block (2a1) is provided at the connection between the inclined top block (2a) and the inclined groove (2b), and a bolt (2a2) is provided on the limit block (2a1) to fix the limit block (2a1) and the inclined top block (2a), and the bottom of the abutting portion (7a) abuts against the limit block (2a1).

3. The bottom support injection mold with oblique ejection and demoulding according to claim 2, characterized in that: A plurality of buckles (8a) are provided on both sides of the bottom support plate (8); the buckles (8a) are integrally formed with the bottom support plate (8) in the side cavity (5a); and a side window (8b) is provided on one side of the bottom support plate (8).

4. The bottom support injection mold with oblique ejection and demoulding according to claim 3, characterized in that: A sliding block (2c) is provided on one side of the movable template (2), and a molding portion (2c1) for forming a side window (8b) structure is provided on the side of the sliding block (2c) close to the molding cavity (5), and the molding portion (2c1) extends into the interior of the molding cavity (5).

5. The bottom support injection mold with oblique ejection and demoulding according to claim 4, characterized in that: A guide groove (2c2) is provided on the top of the slider (2c), and a fixed guide column (1a) is provided on the fixed mold plate (1). The guide column (1a) is arranged obliquely toward the outside of the mold, and the guide column (1a) is inserted into the guide groove (2c2) and slidably connected.

6. The bottom support injection mold with oblique ejection and demoulding according to claim 1, characterized in that: The top of the fixed template (1) is provided with a feed port (1b), the bottom of the feed port (1b) is connected to the forming cavity (5), and the push plate (3a) is also provided with a plurality of fixedly connected straight push rods (3d) and a slide seat (3c), the top of the straight push rod (3d) extends to the bottom of the forming cavity (5), and the bottom of the inclined push rod (3b) is hingedly connected to the slide seat (3c).

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