Insert fixing assembly for insert injection molding and injection mold

Abstract

The invention relates to an insert fixing assembly used for insert injection molding and an injection mold. The insert fixing assembly comprises an air cylinder capable of transversely moving, 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 injection mold structure is not affected, and the production cost is reduced.

Description

Technical Field

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

[0002] From the perspective of traditional market applications, there is no sealing requirement for components after molding, and they are all in the form of through holes. For the fixation of such inserts, it is only necessary to use parts to support the two ends of the inserts to achieve the fixation effect. However, with the vigorous development of new energy vehicles, more and more components have sealing requirements. Of course, some insert-molding products will also have corresponding requirements. When parts are used to support the two ends of the inserts, the contact between the supporting parts and the inserts cannot be completely covered by plastic after the injection molding is completed, resulting in the insert-molding products failing to meet the design requirements and needing to be upgraded to meet the needs.

[0003] Patent publication number CN213006219U discloses a device for fixing product inserts in injection molds, including a plurality of ejector pins respectively mounted on a fixed mold and a movable mold and capable of moving relatively close to each other, the needle heads of the plurality of ejector pins respectively corresponding to different connecting plates of the insert, the ejector pins being connected to a driving mechanism, the driving mechanism comprising a controllable cylinder and a mounting plate for fixing the ejector pins, the mounting plate being connected to the output end of the cylinder. However, the cylinder of the device is located on the fixed mold, and its volume will be limited by the injection molded part. The fixed mold also needs to be reset to facilitate the placement of the cylinder, which will significantly increase the production cost. In addition, multiple cylinders are arranged on one side, which may easily lead to cylinder asynchronism and the risk of unsmooth movement. Summary of the invention

[0004] The purpose of the present invention 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 limited 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 present invention can be achieved by 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, the side of which is provided with a convex block inclined downward in the laterally direction;

[0009] A floating plate with vertical freedom, the side of which is provided with a groove which is inclined downward in the horizontal direction and slidably matched with the protrusion, and the floating plate is arranged to move vertically when the moving rod moves in the horizontal direction;

[0010] A plurality of ejector pins fixedly connected to the floating plate and used to abut against the upper surface of the insert;

[0011] and a guide column which passes through the floating plate and vertically slides with the floating plate.

[0012] Furthermore, the guide column enables the floating plate to move only up and down along the guide column, but cannot move horizontally.

[0013] Furthermore, the moving rod only has the freedom to move horizontally.

[0014] Furthermore, the lateral movement distance of the moving rod is 1 to 2 mm.

[0015] Furthermore, the vertical movement distance of the floating plate is 0.087-1.15 mm.

[0016] Furthermore, two moving rods are provided and symmetrically distributed on both sides of the floating plate, and grooves inclined downward in a transverse direction are provided on both sides of the floating plate.

[0017] Furthermore, the included angle between the protrusion and the horizontal plane is 5° to 30°, and the included angle between the groove and the horizontal plane is consistent with the included angle between the protrusion and the horizontal plane.

[0018] Furthermore, a plurality of first through holes are provided in the floating plate, the ejector pins pass through the first through holes and are connected to the cover plate, and the cover plate is bolted to the floating plate.

[0019] Furthermore, the cover plate is provided with a plurality of third through holes for fixing bolts to pass through and be connected to the floating plate.

[0020] Furthermore, a disc spring is provided between the cover plate and the ejector pin to improve the stability of the ejector pin in moving up and down and to provide a certain buffering effect.

[0021] Furthermore, the moving rod is connected to the cylinder via a connecting rod.

[0022] In another aspect, the present invention further provides an injection mold for insert molding, which includes the insert fixing assembly described above, and the injection mold includes:

[0023] The lower mold plate includes an injection cavity for plastic fluid to flow through and form, and the insert extends into the injection cavity;

[0024] An upper fixing plate on which an injection molding machine is installed;

[0025] An upper mold plate connected to the fixing plate and mounted with an insert fixing assembly, wherein the ejector pin of the insert fixing assembly can pass through the injection cavity and abut against the upper surface of the insert.

[0026] Furthermore, the cylinder is installed on the outer side of the upper template through a mounting frame, does not occupy the space inside and above the upper template, does not need to be restricted by the space of the injection molding machine, does not need to redesign the upper template, and does not need to relocate the injection molding machine.

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

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

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] (1) The present invention arranges the insert fixing assembly to press against the insert during the injection molding of the insert, thereby realizing reliable positioning of the insert; when the insert is injected to the point where only the insert is in contact with the ejector pin, the ejector pin is controlled to move upward, so that the injection molding machine can inject and fill the position left by the ejector pin, so that the surface of the insert is completely covered with plastic, thereby ensuring the sealing performance of the product.

[0031] (2) The present invention drives the moving rod to move horizontally through the cylinder. Since the protrusion on the side of the moving rod is arranged to be inclined downward in the horizontal direction, it cooperates with the groove inclined downward in the horizontal direction, and the floating plate is restricted by the guide column and cannot move horizontally, it can only drive the floating plate to move upward, releasing the vertical displacement generated by relative sliding, so that the moving rod can move horizontally smoothly. When setting, it only needs to set the groove inclined downward on the side of the floating plate, and cooperate with the moving rod with the protrusion, so as to realize the up and down movement of the top rod. The structure is simple and the cost is low, which can not only ensure the performance of the product, but also meet the needs of customers and the market.

[0032] (3) Since the force of the lateral movement of the cylinder is converted into the force of the vertical movement of the push rod, the cylinder can be set on the outer side of the upper template instead of having to be set above the push rod. In the existing injection mold, due to the setting of the injection molding machine, the space above the push rod is usually the structure of the injection molding machine, which has a complex structure, close parts, and little remaining space. If additional driving components are set, they are easily affected by the injection molding machine and are not easy to install. In addition, the driving component structure is usually large and difficult to install directly. The injection mold needs to be redesigned so that the injection molding machine and the driving component do not affect each other. The cost is high and the design is complex, requiring a lot of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the injection mold shown in Example 1;

[0034] Figure 2 is a schematic diagram of the structure of the insert fixing assembly shown in Example 1 ( Figure 1 A magnified schematic diagram of part A in FIG.

[0035] Figure 3 It is a schematic diagram of assembling the floating plate and the moving rod shown in Example 1;

[0036] Figure 4 This is an exploded schematic diagram of the floating plate and the moving rod shown in Example 1.

[0037] Description of the markings in the figure:

[0038] 1- Cylinder;

[0039] 2-mobile rod, 21-bump;

[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-thimble;

[0042] 5-Guide column;

[0043] 6-Inlay;

[0044] 7- Connecting rod;

[0045] 8-upper fixing plate;

[0046] 9-Injection molding machine;

[0047] 10-upper template, 101-mounting frame;

[0048] 11- lower template;

[0049] 12-Injection cavity. DETAILED DESCRIPTION

[0050] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or embodiments, if there is no special description of the functional components or structures, it means that they are all conventional components or conventional structures used in the art to achieve the corresponding functions.

[0051] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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 moving rod 2 connected to the telescopic end of the cylinder 1 and driven to move laterally, and a protrusion 21 inclined downward in the laterally direction is provided on its side;

[0057] A floating plate 3 with vertical freedom, the side of which is provided with a groove 31 which is inclined downward in the horizontal direction and slidably cooperates with the protrusion 21, and the floating plate 3 is arranged to move vertically when the moving rod 2 moves horizontally;

[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 column 5 passing through the floating plate 3 and vertically slidingly cooperating with the floating plate 3.

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

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

[0062] In this embodiment, the horizontal movement distance of the moving 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 , and both sides of the floating plate 3 are provided with grooves 31 inclined downward in a 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 , and 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 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, wherein 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 this embodiment, the cylinder 1 is installed on the outer side of the upper template 10 through the mounting frame 101, does not occupy the space inside and above the upper template 10, does not need to be restricted by the space of the injection molding machine 9, does not need to redesign the upper template 10, and does not need to relocate the injection molding machine 9.

[0074] In this embodiment, the floating plate 3 is provided with a plurality of second through holes 35 for the injection molding 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 with 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 innovation of the present invention, and thus will not be described in detail.

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

[0077] The insert 6 is placed on the lower mold plate 10, and the cylinder 1 is controlled to work, driving the moving rod 2 to move inwardly and laterally, driving the floating plate 3 to move downward, and then the ejector pin 4 is moved downward to pass through the injection cavity 12 and abut against the upper surface of the insert 6. At this time, the injection molding machine 9 is working, and the plastic flows out from the injection head 91 and flows into the injection cavity 12 through the injection channel 111. When the insert 6 is injected to the position where only the ejector pin 4 is in contact, the injection molding machine 9 is controlled to stop working, and the cylinder 1 is controlled to work, driving the moving rod 2 to move outwardly and laterally, driving the floating plate 3 to move upward, and then the ejector pin 4 is moved upward to a certain distance from the upper surface of the insert 6 without passing through the injection cavity 12. At this time, the injection molding machine 9 is controlled to work again, and the 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 the plastic, thereby ensuring the sealing performance of the product.

[0078] Since the protrusion 21 on the side of the moving rod 2 is arranged to be inclined downward in the horizontal direction, and cooperates with the groove 31 on the side of the floating plate 3 which is inclined downward in the horizontal direction, if the floating plate 3 is not restricted by the guide column 5, it can move laterally, and when the cylinder 1 drives the moving rod 2 to move outward laterally, it will also drive the floating plate 3 to move laterally. However, due to the restriction of the guide column 5, the floating plate 3 cannot move laterally. Therefore, when the moving plate 3 moves laterally, the floating plate 3 can only move upward to release the vertical displacement caused by the relative sliding, so that the moving rod can smoothly move horizontally. It is not restricted by the groove 31 which is inclined downward and cannot move laterally. If the floating plate 3 does not move upward, the protrusion 21 has no space to move when it moves horizontally.

[0079] Although the present invention has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. An insert fixing assembly for insert injection molding, characterized in that: include: A cylinder (1) capable of being moved laterally; A moving rod (2) connected to the telescopic end of the cylinder (1) and driven thereby to move laterally, wherein a convex block (21) inclined downward in the laterally direction is provided on the side of the moving rod; A floating plate (3) having vertical freedom, the side of which is provided with a groove (31) inclined downward in the horizontal direction and slidingly matched with the protrusion (21), and the floating plate (3) is arranged to move vertically when the moving rod (2) moves horizontally; 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); And a guide column (5) passing through the floating plate (3) and vertically slidingly cooperating with the floating plate (3).

2. The insert fixing assembly for insert molding according to claim 1, characterized in that: The moving rod (2) has only the freedom to move horizontally.

3. The insert fixing assembly for insert molding according to claim 1, characterized in that: The lateral movement stroke of the moving rod (2) is 1 to 2 mm.

4. The insert fixing assembly for insert molding according to claim 1, characterized in that: Two movable rods (2) are provided, symmetrically distributed on both sides of the floating plate (3), and grooves (31) inclined downward in a transverse direction are provided on both sides of the floating plate (3).

5. The insert fixing assembly for insert molding according to claim 1, characterized in that: The included angle between the protrusion (21) and the horizontal plane is 5° to 30°, and the included angle between the groove (31) and the horizontal plane is consistent with the included angle between the protrusion (21) and the horizontal plane.

6. The insert fixing assembly for insert molding according to claim 1, characterized in that: A plurality of first through holes (32) are provided in the floating plate (3); the ejector pins (4) pass through the first through holes (32) and are connected to the cover plate (33); and the cover plate (33) is bolted to the floating plate (3).

7. The insert fixing assembly for insert molding according to claim 6, characterized in that: A disc spring (34) is also provided between the cover plate (33) and the ejector pin (4).

8. An injection mold for insert molding, characterized in that: It comprises an insert fixing assembly as claimed in any one of claims 1 to 7, wherein the injection mold comprises: The lower mold plate (11) comprises an injection cavity (12) for plastic fluid to flow through and form, and the insert (6) extends into the injection cavity (12); An upper fixing plate (8) on which an injection molding machine (9) is mounted; An upper mold plate (10) connected to the fixing plate (8) and mounted with an insert fixing assembly, wherein the ejector pin (4) of the insert fixing assembly can pass through the injection molding cavity (12) and abut against the upper surface of the insert (6).

9. The injection mold for insert molding according to claim 8, characterized in that: The cylinder (1) is mounted on the outer side of the upper template (10) via a mounting frame (101).

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

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