A demolding structure and demolding method for injection mold of water barrier

Abstract

The present invention discloses a demolding structure and demolding method for a water baffle injection mold, comprising a lower base plate, an ejector plate and a movable mold plate arranged on the upper portion, characterized in that: the movable mold plate comprises a movable mold upper base plate, the edge of the water baffle plate is invertedly snap-fitted to the movable mold upper base plate, the movable mold plate further comprises a movable mold upper bottom frame and a movable mold lower bottom frame arranged below the movable mold upper base plate, the movable mold lower bottom frame is connected to a movable mold insert in contact with the water baffle molding, and the ejector plate is provided with an ejector rod acting below the water baffle as it moves. The demolding structure and demolding method for the water baffle injection mold of the present invention have a simple structure, are convenient for water baffle injection molding, can smoothly eject and remove parts, and have strong practicality and good application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of molds, and more specifically, relates to a demolding structure and a demolding method for a water barrier injection mold. Background Art

[0002] In an era of rapid development, consumers have increasingly higher requirements for automobile performance. Under cost pressure, automobiles must not only reduce costs but also meet automobile sealing requirements, which leads to the emergence of automobile water barrier plastic parts; automobile water barriers must not only meet the rain test requirements of our automobile door guard plate sheet metal, but also meet the vehicle test requirements; so the requirements for the lip structure size of plastic parts are very strict; for water barrier sealing plates, there is a circle of undercuts in the product lip structure because the edge of the product is snap-fitted with the sheet metal; the undercut position structural design of the injection mold usually adopts a beveled top or slider structure, which is conducive to the smooth demolding of the product during ejection; molds with the same structure need to increase the length, width and height of the mold to ensure the strength of the mold due to the beveled top structure and mold strength; at the same time, because the ejection of the beveled top or slider will increase the ejection time of the beveled top slider, the production cycle is lengthened and the production cost is increased. Early versions of this product featured an undercut structure consisting of a cavity, core, and lifter. After injection molding, the lifter ejected the undercut edge before removing the part from the mold. This easily resulted in step differences, flash, and burrs that affected product functionality. This lifter position should be undercut all around, which could lead to uneven ejection of surrounding parts and a decrease in product performance (such as rain testing).

[0003] At present, OEMs are paying more and more attention to the functional requirements of products. For a part with certain hidden dangers, it is necessary to optimize it through design. This product is designed with a straight top structure to solve the problems of controlling product deformation and difficulty in removing parts. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to provide a demolding structure and demolding method for a water baffle injection mold which has a simple structure, is convenient for injection molding of the water baffle, and can smoothly eject and remove the parts.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: the demolding structure of the water baffle injection mold provided includes a lower bottom plate, a ejector plate and a movable mold plate arranged above, and is characterized in that: the movable mold plate includes a movable mold upper bottom plate, the edge of the water baffle is inverted and clamped on the movable mold upper bottom plate, the movable mold plate also includes a movable mold upper bottom frame and a movable mold lower bottom frame arranged below the movable mold upper bottom plate, the movable mold lower bottom frame is connected to a movable mold insert that is in contact with the water baffle molding, and the ejector plate is provided with a push rod that acts below the water baffle as it moves.

[0006] In order to make the above technical solution more detailed and specific, the present invention also provides the following further preferred technical solutions to obtain satisfactory practical effects:

[0007] The ejector plate includes an ejector panel and an ejector bottom plate.

[0008] The ejector panel is connected to a plurality of ejector rods, and the ejector bottom plate is provided with a limiting column which is limited in upward movement to the lower bottom frame of the movable mold.

[0009] The movable mold lower base frame is fixedly connected to the lower base plate through mold feet.

[0010] A limit block for limiting the upward movement of the movable mold upper bottom frame is provided on the movable mold lower bottom frame.

[0011] The movable mold upper base plate and the movable mold upper bottom frame are connected by bolts.

[0012] A pull rod and a guide column spring are provided between the movable plate and the ejector plate.

[0013] A method for demolding a water baffle is characterized in that it includes the following steps: when the mold is opened, the injection molding machine arm drives the ejector plate through the ejector rod to drive the ejector rod to move upward, driving the movable mold upper bottom frame, the movable mold upper bottom plate and the water baffle of the movable mold plate to move upward together, and the movable mold lower bottom frame is connected to the movable mold insert and does not move, thereby separating the product and the movable mold insert; when the movable mold upper bottom frame and the movable mold upper bottom plate part move upward for a distance, they are restricted by the limit block provided on the movable mold lower bottom frame; the injection molding machine arm continues to drive the ejector plate, and at this time the ejector rod continues to move upward to push the edge of the water baffle away from the movable mold upper bottom plate for smooth demolding.

[0014] The ejector rod drives the ejector plate, and the ejector panel and the ejector base plate move together for a distance first. The upper limit column on the ejector base plate contacts and limits the lower bottom frame of the movable mold. The movement of the ejector base plate is limited by the limit column, and the ejector panel and the ejector base plate are driven to separate.

[0015] During the mold opening stage, the ejector panel pushes the compression spring on the guide column spring upward, and the compression spring is compressed. When the mold is closed, the compression spring rebounds and the ejector panel partially returns to its original position.

[0016] Compared with the prior art, the present invention has the following advantages: the demolding structure and demolding method of the water barrier injection mold of the present invention have a simple structure, are convenient for water barrier injection molding, can be ejected and removed smoothly, and have strong practicality and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 This is a schematic structural diagram of the injection mold for the water barrier of the present invention;

[0019] Figure 2 This is a schematic diagram of the action structure of the ejector plate of the present invention;

[0020] Figure 3 This is a schematic diagram of the movable mold action structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the ejection action structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the guide post spring structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the ejector rod ejection structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the working structure of the top rod and the water-blocking plate in the present invention.

[0025] The markings in the figure are: 1. Water-blocking plate, 2. Upper bottom plate of movable mold, 3. Upper bottom frame of movable mold, 4. Lower bottom frame of movable mold, 5. Mold foot, 6. Ejector panel, 7. Ejector bottom plate, 8. Lower bottom plate, 9. Ejector rod, 10. Limit column, 11. Limit block, 12. Movable mold insert, 13. Ejector rod, 14. Pull rod, 15. Guide column spring. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be further explained in detail below through description of embodiments with reference to the accompanying drawings.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0028] The demoulding structure of the injection mold of the water barrier of the present invention is as follows: Figures 1 to 7 As shown in the figure, it includes a lower base plate 8, an ejector plate and a movable platen provided on the upper portion. The movable platen includes a movable mold upper base plate 2. The edge of the water baffle 1 is inverted and clipped onto the movable mold upper base plate 2. The movable platen also includes a movable mold upper bottom frame 3 and a movable mold lower bottom frame 4 provided below the movable mold upper base plate 2. The movable mold lower bottom frame 4 is connected to a movable mold insert 12 that is in molding contact with the water baffle 1. The ejector plate is provided with an ejector rod 13 that acts on the lower portion of the water baffle 1 as it moves. The demolding structure of the present invention has a relatively simple structure, low cost, convenient assembly and disassembly, and high productivity.

[0029] In the present invention, Figures 1 to 5As shown in FIG, the ejector plate includes an ejector panel 6 and an ejector bottom plate 7. A plurality of ejector rods 13 are connected to the ejector panel 6, and a limit column 10 is provided on the ejector bottom plate 7 to limit the upward movement to the lower bottom frame 4 of the movable mold. Figure 2 As shown in the figure, when the mold is opened, the ejector rod 9 of the movable mold part is pushed by the injection molding machine's force arm, driving the ejector panel 6 and the ejector base plate 7 to move a short distance together; then the movement of the ejector base plate 7 is restricted by the limit column 10, and the ejector panel 6 and the ejector base plate 7 are driven apart.

[0030] In the present invention, Figure 3 As shown in the figure, the movable mold lower frame 4 is fixedly connected to the lower base plate 8 via the mold feet 5. Stoppers 11 are provided on the movable mold lower frame 4 to limit the upward movement of the movable mold upper frame 3. The movable mold upper base plate 2 is bolted to the movable mold upper frame 3. The movable mold lower frame 4 and the mold feet 5 are fixed; the movable mold upper frame 3 partially moves a distance, also restrained by the stoppers 11. This structural arrangement facilitates subsequent ejection of the product from the mold by ejecting the ejector pins to the left or right.

[0031] In the present invention, Figure 5 As shown in , a pull rod 14 and a guide post spring 15 are provided between the movable plate and the ejector plate. During the mold opening stage, the ejector panel 6 pushes up the compression spring on the guide post spring 15, and when the mold is closed, the spring rebounds and the ejector panel 6 returns to its original position.

[0032] The present invention provides a method for demolding a water baffle, which includes the following steps: when opening the mold, the injection molding machine arm drives the ejector plate through the ejector rod 9 to drive the ejector rod 13 to move upward, driving the movable mold upper bottom frame 3, the movable mold upper bottom plate 2 and the water baffle 1 of the movable mold plate to move upward together, and the movable mold lower bottom frame 4 is connected to the movable mold insert 12 and does not move, so that the product and the movable mold insert 12 are separated; after the movable mold upper bottom frame 3 and the movable mold upper bottom plate 2 partially move upward for a distance, they are restricted by the limit block 11 provided on the movable mold lower bottom frame 4; the injection molding machine arm continues to drive the ejector plate, and at this time the ejector rod 13 continues to move upward to push the edge of the water baffle 1 away from the movable mold upper bottom plate 2 and successfully demold.

[0033] The ejector rod 9 drives the ejector plate, and the ejector panel 6 and the ejector base plate 7 move together for a distance first. The upper limit column 10 on the ejector base plate 7 contacts and limits the position with the lower bottom frame 4 of the movable mold. The movement of the ejector base plate 7 is restricted by the limit column 10, and the ejector panel 6 and the ejector base plate 7 are driven to separate.

[0034] During the mold opening stage, the ejector panel pushes the compression spring on the guide column spring upward, and the compression spring is compressed. When the mold is closed, the compression spring rebounds and the ejector panel partially returns to its original position.

[0035] The present invention adopts a straight top structure on the injection mold to force demoulding to eject the product smoothly and remove the part, and utilizes the product to have a certain amount of deformation to use straight top ejection to force demoulding of the underside. The product must meet the requirements of the product having the function of sealing and water-proofing, and it must be ensured that after the straight top is ejected, the edge of the product is not deformed due to the straight top ejection. The purpose of the present invention is to adopt a straight top structure on the injection mold to replace the inclined top or slider structure, and adopt a strong demoulding method to smoothly eject the product and remove the part, so as to meet the production and loading requirements, reduce the mold size relative to the mold, reduce the cost; reduce the mold ejection time, save time for production, save machine working hours and labor costs; and provide more options for the subsequent mold design of such products.

[0036] After the large undercut area of ​​the product is separated from the product by the movable mold insert, only the outer sides of the product will be tightly held in the mold. Then the large straight push at the bottom of the product will push out the force to allow the product to deform under the hot state, and finally it will be successfully demolded and separated from the mold.

[0037] The demolding structure and demolding method of the water barrier injection mold of the present invention have a simple structure, are convenient for injection molding of the water barrier, can smoothly eject and remove the parts, and have strong practicality and good application prospects.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned manner. As long as various non-substantial improvements made using the method concept and technical solution of the present invention or direct applications to other occasions are made, they all fall within the scope of protection of the present invention.

Claims

1. A demolding structure for a water barrier injection mold, comprising a lower base plate, an ejector plate, and a movable platen located above, characterized in that: The movable mold plate includes a movable mold upper bottom plate, and the edge of the water baffle is inverted and clamped on the movable mold upper bottom plate. The movable mold plate also includes a movable mold upper bottom frame and a movable mold lower bottom frame arranged below the movable mold upper bottom plate. The movable mold lower bottom frame is connected to a movable mold insert that is in contact with the water baffle forming. The ejector plate is provided with an ejector rod that acts below the water baffle as it moves; the ejector plate includes an ejector panel and an ejector bottom plate; a plurality of the ejector rods are connected to the ejector panel, and the ejector bottom plate is provided with a limit column that limits upward movement to the movable mold lower bottom frame; a pull rod and a guide column spring are provided between the movable mold plate and the ejector plate.

2. The demolding structure of the injection mold for the water barrier according to claim 1, characterized in that: The movable mold lower base frame is fixedly connected to the lower base plate through mold feet.

3. The demolding structure of the injection mold for the water barrier according to claim 1, characterized in that: A limit block for limiting the upward movement of the movable mold upper bottom frame is provided on the movable mold lower bottom frame.

4. The demolding structure of the injection mold for the water barrier according to claim 3, characterized in that: The movable mold upper base plate and the movable mold upper bottom frame are connected by bolts.

5. A method for removing a water barrier, characterized in that: The method comprises the following steps: when the mold is opened, the force arm of the injection molding machine drives the ejector plate through the ejector rod to drive the ejector rod upward, thereby driving the movable mold upper bottom frame, the movable mold upper bottom plate and the water-blocking plate of the movable mold plate to move upward together, and the movable mold lower bottom frame is connected to the movable mold insert and does not move, thereby separating the product and the movable mold insert; after the movable mold upper bottom frame and the movable mold upper bottom plate part move upward for a certain distance, they are restricted by the limit block provided on the movable mold lower bottom frame; and then the force arm of the injection molding machine continues to drive the ejector plate, and at this time the ejector rod continues to move upward to push the edge of the water-blocking plate away from the movable mold upper bottom plate for smooth demoulding.

6. The method for removing the water barrier according to claim 5, characterized in that: The ejector rod drives the ejector plate, and the ejector panel and the ejector base plate move together for a distance first. The upper limit column on the ejector base plate contacts and limits the lower bottom frame of the movable mold. The movement of the ejector base plate is limited by the limit column, and the ejector panel and the ejector base plate are driven to separate.

7. The method for removing the water barrier according to claim 6, characterized in that: During the mold opening stage, the ejector panel pushes the compression spring on the guide column spring upward, and the compression spring is compressed. When the mold is closed, the compression spring rebounds and the ejector panel partially returns to its original position.

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