Mold structure for preventing sheet deviation in in-mold injection molding

Abstract

The utility model discloses a mould structure for preventing sheet deviation during in-mould injection molding, which relates to the technical field of injection moulds and comprises a front mould, a rear mould and a positioning slider structure, a front mould core is arranged in the front mould, a plurality of positioning mounting grooves and sheet mounting grooves are arranged in the front mould core, the positioning mounting grooves are positioned on one side of the sheet mounting grooves, and the sheet mounting grooves are positioned on the other side of the front mould core. A positioning sliding block structure is arranged in the positioning mounting groove, the positioning sliding block structure is detachably mounted in the positioning mounting groove, a rear mold core is arranged in the rear mold, the rear mold core and the front mold core are movably connected in an inserted manner, a sheet supporting groove and a plurality of locking grooves are formed in the rear mold core, and inclined pressing parts are arranged in the locking grooves; the positioning sliding block structure comprises a spring and a sliding block, one end of the sliding block is connected with the spring, and the other end of the sliding block movably abuts against the sheet in the sheet installation groove. The spring is adopted to drive the positioning sliding block to form an inverted buckling structure, the sliding block is automatically buckled after a sheet is placed in, the problems of displacement, falling and the like are effectively prevented, and the qualified rate of finished products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold structure for preventing sheet offset during in-mold injection molding. Background Art

[0002] IML (In Molding Label), Chinese name: in-mold insert injection molding. Its very remarkable feature is that: the surface is a hardened transparent film, the middle is a printed pattern layer, and the back is a plastic layer. Since the ink is sandwiched in the middle, it can prevent the surface of the product from being scratched and resist friction, and can keep the color bright and not fade for a long time, bringing beautiful patterns and superior performance to the surface of the product.

[0003] During the use of most molds for IML in-mold injection molding on the market, when the IML sheet is placed in the injection mold cavity, its positioning is unstable, and it is extremely easy for the sheet to be offset during the injection process, with low efficiency, resulting in poor control of the size of the finished product, excessive white exposure after injection molding, poor stability, and failure to meet product requirements. Therefore, a mold structure for preventing sheet offset during in-mold injection molding is needed to improve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mold structure for preventing sheet offset during in-mold injection molding, aiming to solve the above technical problems. The utility model sets a positioning slider structure, and the slider is driven by a spring, so that the slider is sprung open by the spring to form an inverted buckle shape. At this time, the sheet is placed in the sheet installation groove, and the slider then positions and buckles the sheet, making it not easy for the sheet to fall, be offset or run out of position, improving the quality of the finished product and reducing the defective rate.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0006] A mold structure for preventing sheet offset during in-mold injection molding includes a front mold, a rear mold and a positioning slider structure. The front mold and the rear mold are detachably connected. There is a front mold core in the front mold. There are several positioning installation grooves and a sheet installation groove for installing the sheet in the front mold core. The positioning installation grooves are located on one side of the sheet installation groove. The positioning slider structure is detachably installed in the positioning installation grooves. There is a rear mold core in the rear mold. The rear mold core is movably inserted and connected with the front mold core. There is a sheet support groove and several locking grooves in the rear mold core. There is an inclined pressing part in the locking grooves.

[0007] The positioning slider structure includes a spring and a slider. One end of the slider is connected with the spring, and the other end of the slider can movably abut against the sheet in the sheet installation groove. When the mold is closed, the slider can be clamped in the locking groove along the inclined pressing part.

[0008] Further, the positioning slider structure further includes a slider seat, which is symmetrically arranged on both sides of the slider, and the slider seat is fixedly installed in the positioning installation groove, and the slider can slide between the two slider seats.

[0009] Further, the slider includes a positioning portion, a sliding portion and a locking portion. The positioning portion can movably abut against the sheet in the sheet installation groove. Sliding connection ends are provided on both sides of the sliding portion, and the sliding connection ends are in an "L" shape. The sliding connection ends are slidably connected to the slider seat, and an inclined end face is provided in the locking portion.

[0010] Further, the oblique pressing portion includes an inclined surface end portion and a pressing end portion. The inclined surface end portion is movably connected to the inclined end face, and the pressing end portion is movably connected to the positioning portion. When the mold is closed, the pressing end portion is connected to the positioning portion, the locking portion is located in the locking groove, and the inclined surface end portion is connected to the inclined end face.

[0011] Further, a spring connection hole is provided in the sliding portion. One end of the spring is installed in the spring connection hole, and the other end of the spring is connected to the inner side of the positioning installation groove.

[0012] Further, a plurality of insertion blocks are provided on the front mold core, and a plurality of insertion grooves are provided on the rear mold core. The insertion blocks are adapted to the insertion grooves.

[0013] Further, it further includes a front template, square iron, rear template and ejector pin assembly. One end of the front template is connected to the front mold. There are two square irons. One end of the square iron is connected to the rear mold, and the other end is connected to the rear template. The ejector pin assembly is movably arranged between the two square irons.

[0014] Further, the ejector pin assembly includes a first top plate, a second top plate and a plurality of ejector pins. One end of the first top plate is connected to the second top plate. One end of the ejector pin is fixed in the first top plate, and the other end can movably pass through the first top plate, rear mold, rear mold core and extend outwards.

[0015] Further, it further includes a gate channel, a front mold cooling channel and a rear mold cooling channel. One end of the gate channel passes through the front template, front mold, front mold core and communicates with the sheet installation groove. One end of the front mold cooling channel penetrates into the interior of the front mold and front mold core, and one end of the rear mold cooling channel penetrates into the interior of the rear mold and rear mold core.

[0016] Further, it further includes a plurality of first guiding columns, a plurality of second guiding columns and a plurality of third guiding columns. One end of the first guiding column is installed in the front mold, and the other end thereof passes through the front mold and is movably inserted and connected with the rear mold. One end of the second guiding column is installed in the rear template, and the other end thereof passes through the second top plate, the first top plate and is inserted into the rear mold. One end of the third guiding column is installed in the first top plate, and the other end thereof passes through the first top plate and the rear mold and extends outwards.

[0017] The mold structure for preventing the sheet material from being displaced during in-mold injection of the present utility model has the following beneficial effects:

[0018] In the mold structure for preventing the sheet material from being displaced during in-mold injection of the present utility model, a positioning slider structure is provided in the front mold core of the injection mold. In the mold open state, the slider of the positioning slider structure is driven by a spring, so that the slider is sprung open by the spring to form an undercut shape. At this time, when the sheet material is placed in the sheet material installation groove, the slider will position and clamp the sheet material, making it difficult for the sheet material to fall off and preventing problems such as displacement and running off.

[0019] When the mold is closed, the slider moves and presses back to its original position under the guidance of the inclined pressing part of the rear mold. The spring is compressed and the locking part of the slider is located in the locking groove, which will not affect the structural characteristics of the product during injection molding, avoiding excessive white exposure on the product after injection and improving the qualified rate. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model in the open mold state;

[0021] Figure 2 is a schematic cross-sectional structural diagram of the present utility model in the closed mold state;

[0022] Figure 3 is a schematic structural diagram of the positioning slider structure and the front mold core of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the rear mold core of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the positioning slider structure of the present utility model;

[0025] Figure 6 is another schematic structural diagram of the positioning slider structure of the present utility model;

[0026] Figure 7 is a schematic diagram of the structural disassembly of the present utility model Figure 1 ;

[0027] Figure 8 is a schematic diagram of the structural disassembly of the present utility model Figure 2 。 Detailed implementation mode

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the products of the present utility model will be further described in detail below in conjunction with embodiments and drawings.

[0029] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be a middle element; when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation mode.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific implementation modes and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] As Figure 1 、 Figure 2 and Figure 4 shown, a mold structure for preventing the offset of a sheet in in-mold injection molding includes a front mold 1, a rear mold 2 and a positioning slider structure 3. The front mold 1 and the rear mold 2 are detachably connected. A front mold core 4 is provided in the front mold 1. A plurality of positioning installation grooves and a sheet installation groove 5 for installing a sheet 12 are provided in the front mold core 4. The positioning installation grooves are located on one side of the sheet installation groove 5. The positioning slider structure 3 is detachably installed in the positioning installation groove. A rear mold core 6 is provided in the rear mold 2. The rear mold core 6 is movably inserted and connected with the front mold core 4. A sheet support groove 7 and a plurality of locking grooves 8 are provided in the rear mold core 6. An inclined pressing portion 9 is provided in the locking groove 8.

[0032] As Figure 3 shown, the positioning slider structure 3 includes a spring 10 and a slider 11. One end of the slider 11 is connected to the spring 10. The other end of the slider 11 can movably abut against the sheet 12 in the sheet installation groove 5. When the mold is closed, the slider 11 can be clamped in the locking groove 8 along the inclined pressing portion 9. The positioning slider structure 3 further includes a slider seat 13. The slider seat 13 is symmetrically arranged on both sides of the slider 11 and is fixedly installed in the positioning installation groove. The slider 11 can slide between the two slider seats 13. The slider seat 13 is installed in the positioning installation groove through fasteners, which is convenient for disassembly and assembly.

[0033] As Figures 3 to 6As shown, the slider 11 includes a positioning portion 14, a sliding portion 15, and a locking portion 16. The positioning portion 14 can movably abut against the sheet 12 in the sheet installation groove 5. Both sides of the sliding portion 15 are provided with sliding connection ends, and the sliding connection ends are in an "L" shape. The sliding connection ends are slidably connected to the slider seat 13. An inclined end face 17 is provided in the locking portion 16.

[0034] It should be noted that, as Figure 3 and Figure 5 shown, the positioning slider structure 3 is detachably arranged, which is convenient for disassembly and installation and for replacing the slider 11 with different-shaped positioning portions 14.

[0035] As Figures 3 to 5 shown, the oblique pressing portion 9 includes a bevel end 18 and a pressing end 19. The bevel end 18 is movably connected to the inclined end face 17, and the pressing end 19 is movably connected to the positioning portion 14. When the mold is closed, the pressing end 19 is connected to the positioning portion 14, the locking portion 16 is located in the locking groove 8, and the bevel end 18 is connected to the inclined end face 17.

[0036] It should be noted that in the present utility model, a positioning slider structure 3 is provided in the front mold core 4 of the injection mold. In the mold opening state, the slider 11 of the positioning slider structure 3 is driven by the spring 10, so that the slider 11 is sprung open by the spring 10 to form an undercut shape. At this time, when the sheet 12 is placed in the sheet installation groove 5, the slider 11 will position and press the sheet 12, making it not easy for the sheet 12 to fall off and not generating problems such as deviation and displacement;

[0037] When the mold is closed, the slider 11 moves and presses back to its original position under the guidance of the oblique pressing portion 9 of the rear mold 2. The spring 10 is compressed, and the locking portion 16 of the slider 11 is located in the locking groove 8, which will not affect the structural characteristics of the product during injection molding, avoiding excessive exposed white on the product after injection molding, improving the finished product quality, and reducing the defective rate.

[0038] As Figure 4 shown, a spring connection hole is provided in the sliding portion 15. One end of the spring 10 is installed in the spring connection hole, and the other end of the spring 10 is connected to the inner side of the positioning installation groove.

[0039] As Figure 3 and Figure 4 shown, a plurality of insertion blocks 20 are provided on the front mold core 4, and a plurality of insertion grooves 21 are provided on the rear mold core 6. The insertion blocks 20 are adapted to the insertion grooves 21.

[0040] As Figure 1As shown, it further includes a front template 22, square iron bars 23, a rear template 24, and a thimble assembly 25. One end of the front template 22 is connected to the front mold 1. There are two square iron bars 23. One end of the square iron bars 23 is connected to the rear mold 2, and the other end is connected to the rear template 24. The thimble assembly 25 is movably arranged between the two square iron bars 23. A through hole 26 is provided on the rear template 24.

[0041] It should be further noted that the front template 22 and the front mold 1 are installed and fixed by fasteners, and the square iron bars 23, the rear mold 2, and the rear template 24 are all installed and fixed by fasteners, which is convenient for disassembly and assembly. In this example, the fasteners are common fastening components such as screws and bolts.

[0042] As Figure 2 shown, the thimble assembly 25 includes a first top plate 27, a second top plate 28, and a plurality of thimbles 29. One end of the first top plate 27 is connected to the second top plate 28. One end of the thimble 29 is fixed inside the first top plate 27, and the other end can movably pass through the first top plate 27, the rear mold 2, and the rear mold core 6 and extend outwards. The first top plate 27 and the second top plate 28 are installed and fixed by fasteners.

[0043] As Figure 2 shown, it further includes a gate channel 30, a front mold cooling channel 31, and a rear mold cooling channel 32. One end of the gate channel 30 passes through the front template 22, the front mold 1, and the front mold core 4 and communicates with the sheet mounting groove 5. One end of the front mold cooling channel 31 penetrates into the interior of the front mold 1 and the front mold core 4, and one end of the rear mold cooling channel 32 penetrates into the interior of the rear mold 2 and the rear mold core 6.

[0044] It should be noted that when the mold is closed, raw materials are injected into the gate channel 30, and the raw materials flow to the surface of the sheet 12, realizing the injection molding of a film covering layer on the surface of the sheet 12; by setting the front mold cooling channel 31 and the rear mold cooling channel 32, the cooling and forming of the product can be accelerated.

[0045] As Figure 7 and Figure 8 shown, it further includes a plurality of first guide posts 33, a plurality of second guide posts 34, and a plurality of third guide posts 35. One end of the first guide post 33 is installed inside the front mold 1, and the other end passes through the front mold 1 and is movably inserted and connected to the rear mold 2. One end of the second guide post 34 is installed inside the rear template 24, and the other end passes through the second top plate 28, the first top plate 27 and is inserted into the rear mold 2. One end of the third guide post 35 is installed inside the first top plate 27, and the other end passes through the first top plate 27 and the rear mold 2 and extends outwards, further improving the positioning accuracy. The first top plate 27 and the second top plate 28 can move up and down along the second guide post 34.

[0046] It should be noted that when the injection molding is completed, the front mold 1 is separated from the rear mold 2, and the injection molded product is temporarily stored on the sheet support groove 7. The ejector pin of the injection molding machine passes through the through hole 26 of the rear template 24 and presses against the second top plate 28, causing the first top plate 27 to move upward, thereby driving the ejector pin 29 upward to eject the injection molded product from the sheet support groove 7.

[0047] As mentioned above, it is only the preferred embodiment of the present invention, and there is no any formal restriction on the present invention; any ordinary technician in this industry can smoothly implement the present invention according to the illustrations in the specification and the above description; however, any minor changes, modifications and equivalent variations made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and variations made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A mold structure for preventing sheet material from being displaced during in-mold injection molding, characterized in that: The invention comprises a front mold, a rear mold and a positioning slider structure, wherein the front mold and the rear mold are detachably connected, a front mold core is arranged in the front mold, a plurality of positioning installation grooves and a sheet material installation groove for installing a sheet material are arranged in the front mold core, the positioning installation groove is located on one side of the sheet material installation groove, the positioning slider structure is detachably installed in the positioning installation groove, a rear mold core is arranged in the rear mold, the rear mold core and the front mold core are movably plug-connected, a sheet material supporting groove and a plurality of locking grooves are arranged in the rear mold core, and an oblique pressing portion is arranged in the locking groove; The positioning slider structure includes a spring and a slider, one end of the slider is connected to the spring, and the other end of the slider can movably abut the sheet in the sheet installation groove. When the mold is closed, the slider can be clamped in the locking groove along the oblique pressure part.

2. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 1, characterized in that: The positioning slider structure also includes a slider seat, which is symmetrically arranged on both sides of the slider and fixedly installed in the positioning installation groove. The slider can slide between the two slider seats.

3. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 2, characterized in that: The slider includes a positioning portion, a sliding portion and a locking portion. The positioning portion can movably abut the sheet in the sheet installation groove. Sliding connection ends are provided on both sides of the sliding portion. The sliding connection ends are in an "L" shape. The sliding connection ends are slidably connected to the slider seat. An inclined end surface is provided in the locking portion.

4. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 3 is characterized in that: The inclined pressing part includes a bevel end and a tightening end, the bevel end is movably connected to the inclined end surface, and the tightening end is movably connected to the positioning part. When the mold is closed, the tightening end is connected to the positioning part, the locking part is located in the locking groove, and the bevel end is connected to the inclined end surface.

5. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 4 is characterized in that: A spring connection hole is provided in the sliding part, one end of the spring is installed in the spring connection hole, and the other end of the spring is connected to the inner side of the positioning installation groove.

6. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 5, characterized in that: The front mold core is provided with a plurality of plug-in blocks, and the rear mold core is provided with a plurality of plug-in slots, and the plug-in blocks are adapted to the plug-in slots.

7. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 1, characterized in that: It also includes a front template, a square iron, a rear template and an ejector assembly, wherein one end of the front template is connected to the front template, the square iron is divided into two pieces, one end of the square iron is connected to the rear template, and the other end is connected to the rear template, and the ejector assembly is movably arranged between the two square irons.

8. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 7, characterized in that: The ejector assembly includes a first ejector plate, a second ejector plate and a plurality of ejectors, one end of the first ejector plate is connected to the second ejector plate, one end of the ejector pin is fixed in the first ejector plate, and the other end thereof can movably pass through the first ejector plate, the rear mold and the rear mold core to extend outward.

9. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 8, characterized in that: It also includes a gate channel, a front mold cooling channel and a rear mold cooling channel. One end of the gate channel passes through the front mold plate, the front mold, the front mold core and communicates with the sheet mounting groove. One end of the front mold cooling channel penetrates into the front mold and the front mold core. One end of the rear mold cooling channel penetrates into the rear mold and the rear mold core.

10. The mold structure for preventing sheet material from being displaced during in-mold injection molding according to claim 9, characterized in that: It also includes a plurality of first guide pillars, a plurality of second guide pillars and a plurality of third guide pillars, wherein one end of the first guide pillar is installed in the front mold, and the other end thereof passes through the front mold and is movably plugged into the rear mold, one end of the second guide pillar is installed in the rear mold plate, and the other end thereof passes through the second top plate and the first top plate and is inserted into the rear mold, and one end of the third guide pillar is installed in the first top plate, and the other end thereof passes through the first top plate and the rear mold and extends outward.

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