Insert fixing assembly for insert injection molding and injection mold

Abstract

The utility model relates to an insert fixing assembly for insert injection molding and an injection mold. The insert fixing assembly comprises an air cylinder capable of moving transversely, an insert fixing assembly and an insert fixing assembly, the moving rod is connected with the telescopic end of the air cylinder and driven by the air cylinder to move transversely, and a convex block inclining downwards in the transverse direction is arranged on the side portion of the moving rod; the floating plate has a vertical displacement degree, a groove inclining downwards in the transverse direction is formed in the side portion of the floating plate, the protruding block is matched with the groove, and the floating plate is arranged to move in the vertical direction when the moving rod moves in the transverse direction; the ejector pins are fixedly connected with the floating plate and used for abutting against the upper surface of the insert; and the guide post penetrates through the floating plate and is used for limiting the transverse movement of the floating plate. The injection mold comprises the insert fixing assembly. Compared with the prior art, the purpose of fixing and positioning the insert can be effectively achieved, it is guaranteed that the insert is completely covered with plastic, the sealing requirement of a product is met, meanwhile, limitation of an injection molding machine structure in an injection mold is avoided, the structure of the injection mold is not affected, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of product injection molding, in particular to an insert fixing component and an injection mold for insert injection molding. Background Art

[0002] In traditional market applications, components typically have through-holes and no sealing requirements after molding. To secure these inserts, simply use supporting parts at both ends. However, with the rapid development of new energy vehicles, more and more components require sealing, and some insert-molding products also have corresponding requirements. However, when using supporting parts at both ends of the insert, the contact area between the supporting parts and the insert is not fully covered by plastic after injection molding. This causes insert-molding products to fail to meet design requirements and require upgrades to meet these demands.

[0003] Patent publication number CN213006219U discloses a device for fixing product inserts in injection molds, comprising a plurality of ejector pins mounted on the fixed mold and movable mold, each of which can move relatively close to the other. The needles of the plurality of ejector pins correspond to different connecting plates of the insert, and the ejector pins are connected to a drive mechanism comprising a controllable cylinder and a mounting plate for fixing the ejector pins, wherein the mounting plate is connected to the output end of the cylinder. However, the cylinder of this device is located on the fixed mold, and its volume is limited by the injection molded part. The fixed mold also needs to be rearranged to facilitate the placement of the cylinder, which significantly increases production costs. In addition, multiple cylinders are arranged on one side, which can easily lead to cylinder asynchrony and the risk of unsmooth movement. Utility Model Content

[0004] The purpose of the present utility model is to overcome the defects of the above-mentioned prior art and to provide an insert fixing assembly and an injection mold for insert injection molding, which can effectively achieve the purpose of insert fixing and positioning, ensure that the insert is completely covered by plastic, meet the sealing requirements of the product, and at the same time is not restricted by the structure of the injection molding machine in the injection mold, does not affect the structure of the injection mold, and reduces production costs.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] In one aspect, the present invention provides an insert fixing assembly for insert molding, comprising:

[0007] A cylinder capable of laterally moving;

[0008] A moving rod connected to the telescopic end of the cylinder and driven thereby to move laterally, wherein a protrusion inclined downward in a laterally direction is provided on the side of the moving rod;

[0009] The floating plate with vertical freedom degree, the side part of which is provided with a groove inclined downward along the horizontal direction and slidingly matched with the convex block, is arranged to move vertically when the moving rod moves horizontally;

[0010] A plurality of top pins fixedly connected with the floating plate and used for abutting against the upper surface of the insert;

[0011] And a guide column penetrating through the floating plate and slidingly matched with the floating plate in the vertical direction.

[0012] Further, the guide column enables the floating plate to only move upward and downward, and cannot move horizontally.

[0013] Further, the moving rod only has the freedom degree of moving horizontally.

[0014] Further, the moving distance of the moving rod is 1-2mm.

[0015] Further, the moving distance of the floating plate is 0.087-1.15mm.

[0016] Further, the moving rod is provided with two, symmetrically distributed on the two sides of the floating plate, and the two sides of the floating plate are provided with grooves inclined downward along the horizontal direction.

[0017] Further, the included angle between the convex block and the horizontal plane is 5-30°, and the included angle between the groove and the horizontal plane is consistent with the included angle between the convex block and the horizontal plane.

[0018] Further, a plurality of first through holes are arranged in the floating plate, the top pins penetrate through the first through holes and are connected with the cover plate, and the cover plate is bolted with the floating plate.

[0019] Further, a plurality of third through holes are arranged on the cover plate, and the fixing bolts penetrate through the third through holes and are connected with the floating plate.

[0020] Further, a disc spring is arranged between the cover plate and the top pin, so as to improve the stability of the upward and downward movement of the top pin and provide a certain buffering effect.

[0021] Further, the moving rod is connected with the air cylinder through a connecting rod.

[0022] In another aspect, the utility model also provides an injection mold for insert injection molding, which comprises the insert fixing assembly.

[0023] A lower fixed plate, which comprises an injection cavity for plastic fluid to flow through and be shaped, and the insert extends into the injection cavity;

[0024] An upper fixed plate provided with an injection machine;

[0025] An upper mold plate connected with the fixed plate and provided with an insert fixing assembly, a ejector pin of the insert fixing assembly being capable of penetrating the injection cavity and abutting against the upper surface of the insert.

[0026] Further, the air cylinder is installed on the outer side of the upper mold plate through the mounting frame, without occupying the space above and inside the upper mold plate, without being limited by the space of the injection molding machine, without the need of redesigning the upper mold plate and without the need of repositioning the injection molding machine.

[0027] Further, the floating plate is provided with a plurality of second through holes for the injection head of the injection molding machine to penetrate;

[0028] The lower mold plate is provided with an injection channel connecting the injection cavity and the injection head. The injection molding machine and other structures of the injection mold adopt the conventional structures in the art, which are irrelevant to the innovation of the utility model and thus are not described herein.

[0029] Compared with the prior art, the utility model has the following advantages:

[0030] (1) The utility model discloses an insert fixing assembly which abuts against the insert during the injection molding of the insert, thereby realizing the reliable positioning of the insert.

[0031] (2) The utility model discloses an air cylinder which drives the moving rod to move horizontally and transversely. The protrusions on the side of the moving rod are arranged obliquely downward along the transverse direction and are matched with the recesses arranged obliquely downward along the transverse direction. Further, the floating plate is limited by the guide column and cannot move transversely, but can only move upward, thereby releasing the vertical displacement caused by the relative sliding, and enabling the moving rod to move horizontally and transversely smoothly. When arranged, only the recesses arranged obliquely downward along the transverse direction need to be arranged on the side of the floating plate, and the moving rod with the protrusions is matched, thereby realizing the upward and downward movement of the ejector pin. The structure is simple, the cost is low, the performance of the product can be ensured, and the needs of customers and the market can be met.

[0032] (3) The application can set the air cylinder on the outer side of the upper mold plate instead of above the ejector rod because it converts the force of the lateral movement of the air cylinder into the force of the vertical movement of the ejector rod. In the existing injection mold, the space above the ejector rod is usually the structure of the injection molding machine due to the setting of the injection molding machine. The structure is complex, the parts are close, and the remaining space is small. When additional driving components are set, they are easily affected by the injection molding machine and are not easy to install. Moreover, the driving component mechanism is usually large and difficult to install directly, and the injection mold needs to be redesigned to make the injection molding machine and the driving component not affect each other, which is costly and complex in design, and requires a lot of manpower and material resources. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Structure diagram of the injection mold shown in Example 1;

[0034] Figure 2 Structure diagram of the insert fixing assembly shown in Example 1 Figure 1 Enlarged diagram of part A;

[0035] Figure 3 Assembly diagram of the floating plate and the moving rod shown in Example 1;

[0036] Figure 4 Exploded diagram of the floating plate and the moving rod shown in Example 1.

[0037] MARK DESCRIPTION IN THE FIGURE:

[0038] 1 - air cylinder;

[0039] 2 - moving rod, 21 - protrusion;

[0040] 3 - floating plate, 31 - groove, 32 - first through hole, 33 - cover plate, 34 - disc spring, 35 - second through hole, 36 - fixing bolt;

[0041] 4 - ejector pin;

[0042] 5 - guide column;

[0043] 6 - insert;

[0044] 7 - connecting rod;

[0045] 8 - upper fixed plate;

[0046] 9 - injection molding machine;

[0047] 10 - upper mold plate, 101 - mounting bracket;

[0048] 11 - lower mold plate;

[0049] 12 - injection cavity. DETAILED DESCRIPTION

[0050] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0051] It should be noted that in the description of this utility model, the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0053] Example 1

[0054] like Figures 1 to 4 As shown, an insert fixing assembly for insert molding comprises:

[0055] A cylinder 1 capable of laterally moving;

[0056] A movable rod 2 connected to the telescopic end of the cylinder 1 and driven thereby to move laterally, wherein a protrusion 21 inclined laterally downward is provided on its side;

[0057] A floating plate 3 having vertical freedom, with a groove 31 on its side inclined downward in the horizontal direction and slidingly engaged with the protrusion 21, wherein the floating plate 3 is configured to move vertically when the moving rod 2 moves laterally;

[0058] A plurality of ejector pins 4 fixedly connected to the floating plate 3 and used to abut against the upper surface of the insert 6;

[0059] and a guide post 5 passing through the floating plate 3 and vertically slidingly cooperating with the floating plate 3 .

[0060] In this embodiment, the guide post 5 allows the floating plate 3 to move only up and down along the guide post, but cannot move horizontally.

[0061] In this embodiment, the moving rod 2 only has the freedom to move horizontally.

[0062] In this embodiment, the horizontal movement distance of the movable rod 2 is 1.5 mm, the angle between the protrusion 21 and the horizontal plane is 30°, and the angle between the groove 31 and the horizontal plane is consistent with the angle between the protrusion 21 and the horizontal plane. The vertical movement distance of the floating plate 3 is 0.87 mm.

[0063] In this embodiment, two moving rods 2 are provided, which are symmetrically distributed on both sides of the floating plate 3 . Both sides of the floating plate 3 are provided with grooves 31 inclined downward in the transverse direction.

[0064] In this embodiment, a plurality of first through holes 32 are provided in the floating plate 3 , and the ejector pins 4 pass through the first through holes 32 and are connected to the cover plate 33 . The cover plate 33 is bolted to the floating plate 3 .

[0065] In this embodiment, the cover plate 33 is provided with a plurality of third through holes for the fixing bolts 36 to pass through and be connected to the floating plate 3 .

[0066] In this embodiment, a disc spring 34 is further provided between the cover plate 33 and the ejector pin 4 to improve the stability of the up and down movement of the ejector pin 4 and to provide a certain buffering effect.

[0067] In this embodiment, the moving rod 2 is connected to the cylinder 1 via a connecting rod 7 .

[0068] In this embodiment, the insert 6 is a bolt.

[0069] like Figure 1 As shown, an injection mold for insert injection molding includes the insert fixing assembly described above, and the injection mold includes:

[0070] The lower mold plate 11 includes an injection cavity 12 for plastic fluid to flow through and form, and the insert 6 extends into the injection cavity 12;

[0071] An upper fixing plate 8 on which an injection molding machine 9 is mounted;

[0072] An upper mold plate 10 connected to the fixing plate 8 and mounted with an insert fixing assembly is provided. The ejector pin 4 of the insert fixing assembly can pass through the injection cavity 12 and abut against the upper surface of the insert 6 .

[0073] In the embodiment, the cylinder 1 is installed on the outer side of the upper mold plate 10 through the mounting frame 101, does not occupy the space inside and above the upper mold plate 10, does not need to be limited by the space of the injection molding machine 9, does not need to be redesigned, and does not need to be repositioned.

[0074] In the embodiment, the floating plate 3 is provided with a plurality of second through holes 35 for the injection head of the injection molding machine 9 to pass through.

[0075] The lower mold plate 11 is provided with an injection channel connecting the injection cavity 12 and the injection head. The ejector pin 4 does not intersect the injection channel. The structure of the injection molding machine 9 and the injection mold adopts a conventional structure in the art, which is irrelevant to the innovative point of the utility model, and thus is not described in detail.

[0076] The working principle of the insert fixing assembly and the injection mold in the embodiment is as follows:

[0077] The insert 6 is placed on the lower mold plate 10, the cylinder 1 is controlled to work, the moving rod 2 is driven to move inward in the transverse direction, the floating plate 3 is driven to move downward, and then the ejector pin 4 moves downward to pass through the injection cavity 12 and abuts against the upper surface of the insert 6. At this time, the injection molding machine 9 works, plastic flows out from the injection head 91, flows into the injection cavity 12 through the injection channel 111, and when the insert 6 is injected to the position where it only contacts the ejector pin 4, the injection molding machine 9 is controlled to stop working, the cylinder 1 is controlled to work, the moving rod 2 is driven to move outward in the transverse direction, the floating plate 3 is driven to move upward, and then the ejector pin 4 moves upward to a certain distance from the upper surface of the insert 6 and does not pass through the injection cavity 12. At this time, the injection molding machine 9 is controlled to work again, plastic flows out from the injection head 91, flows into the injection cavity 12 through the injection channel 111, and fills the position left by the ejector pin 4, so that the surface of the insert 6 is completely covered by plastic, thereby ensuring the sealing performance of the product.

[0078] Because the protrusion 21 on the side of the moving rod 2 is arranged in the inclined downward transverse direction and cooperates with the groove 31 on the side of the floating plate 3 in the inclined downward transverse direction, if the floating plate 3 is not limited by the guide column 5, it can move in the transverse direction, and when the cylinder 1 drives the moving rod 2 to move outward in the transverse direction, it drives the floating plate 3 to also move in the transverse direction. However, because the floating plate 3 is limited by the guide column 5, it cannot move in the transverse direction, so when the moving plate 3 moves in the transverse direction, the floating plate 3 can only move upward to release the vertical displacement amount generated by the relative sliding, so that the moving rod can smoothly move horizontally in the transverse direction. If the floating plate 3 does not move upward, the protrusion 21 does not have a moving space when it moves horizontally in the transverse direction.

[0079] Although the utility model has been described in detail above with general description, specific implementation and test, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model all belong to the scope of protection required by the utility model.

Claims

1. An insert fixing assembly for insert injection molding, characterized in that: The utility model relates to a kind of injection mould insert fixing assembly, which comprises: Transversely movable air cylinder (1); With the telescopic end of the air cylinder (1) is connected and is driven to transversely move moving rod (2), its side is provided with along transverse tilting downward protrusion (21); With vertical degree of freedom floating plate (3), its side is provided with along transverse tilting downward and with the sliding fit of the protrusion (21) recess (31), the floating plate (3) is set to when the moving rod (2) transversely moves, it moves along vertical direction; With several pins (4) for abutting against the upper surface of insert (6) and being fixedly connected with the floating plate (3); And guide column (5) passes through the floating plate (3) and is slidably connected with it vertically.

2. An insert fixation assembly for insert injection molding as defined in claim 1, wherein, The moving rod (2) only has the freedom of horizontal transverse movement.

3. An insert holding assembly for insert injection molding according to claim 1, wherein The moving rod (2) transversely moves the distance of 1~2mm.

4. An insert holding assembly for insert injection molding according to claim 1, wherein The moving rod (2) is provided with two, symmetrically distributed on the two sides of the floating plate (3), and the two sides of the floating plate (3) are provided with recess (31) along transverse tilting downward.

5. An insert holding assembly for insert injection molding according to claim 1, wherein The angle between the protrusion (21) and the horizontal plane is 5°~30°, and the angle between the recess (31) and the horizontal plane is consistent with the angle between the protrusion (21) and the horizontal plane.

6. An insert holding assembly for insert injection molding according to claim 1, wherein The floating plate (3) is provided with a plurality of first through holes (32), the pins (4) pass through the first through holes (32) and are connected with cover plate (33), and the cover plate (33) is bolted with the floating plate (3).

7. An insert fixation assembly for insert injection molding as defined in claim 6, wherein, A disc spring (34) is further arranged between the cover plate (33) and the pin (4).

8. An injection mold for insert molding, characterized in that It comprises the insert fixing assembly as claimed in any one of claims 1~7, and the injection mould comprises: Lower die plate (11) comprising injection cavity (12) for plastic fluid to flow through and form, and the insert (6) extends into the injection cavity (12) inside; Upper fixed plate (8) provided with injection molding machine (9); Upper die plate (10) connected with the fixed plate (8) and provided with insert fixing assembly, and the pin (4) of the insert fixing assembly can pass through the injection cavity (12) and abut against the upper surface of the insert (6).

9. An injection mold for insert molding according to claim 8, characterized in that The air cylinder (1) is installed on the outer side of the upper die plate (10) through mounting bracket (101).

10. An injection mold for insert molding according to claim 8, wherein, The floating plate (3) is provided with a plurality of second through holes (35) for the injection head of the injection molding machine (9) to pass through; The lower die plate (11) is provided with injection channel connecting the injection cavity (12) and the injection head.

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