Needle roller injection molding retainer, needle roller structure and light guide plate injection molding mold

Abstract

The present invention provides a needle roller injection molding retainer, a needle roller structure, and a light guide plate injection molding mold. The needle roller injection molding retainer includes a retainer body; a plurality of needle roller placement grooves, wherein the needle roller placement grooves are provided on the retainer body along the thickness direction; wherein the needle roller placement grooves are provided with fixed side groove walls, and needle roller fixing baffles are provided at both ends of the fixed side groove walls, and the needle roller fixing baffles are provided with recesses adapted to the needle rollers. By providing needle roller placement grooves for fixing needle rollers on the retainer body, a plurality of needle rollers can be integrated into the needle roller injection molding retainer, thereby facilitating the assembly of needle rollers on the precision motion cavity parts of the light guide plate injection molding mold, assisting in fixing and regulating the relative positions between the needle rollers, forming a stable contact surface, and improving the protection effect of the needle roller multi-motion cavity parts, thereby improving the service life of the light guide plate injection molding mold.

Description

Technical Field

[0001] The present invention relates to the technical field of light guide plate injection molds, and in particular to a needle roller injection molding retainer, a needle roller structure and a light guide plate injection mold. Background Art

[0002] The injection mold of the light guide plate usually includes a movable mold and a fixed mold. When the movable mold and the fixed mold are opened and closed, several precisely matched moving cavity parts inside are usually in relative sliding surface contact; however, this surface contact sliding structure often has excessive resistance, and the running cavity parts are prone to damage each other.

[0003] In the prior art, in order to reduce the problem of surface contact sliding between running cavity parts, gaps are usually set between the running cavity parts, and needle rollers are set in the fitting gaps of the running cavity parts. However, the needle rollers are in a free state between the running cavity parts, and the positions of multiple needle rollers are messy and uncontrollable, resulting in unstable contact surfaces, thereby reducing the product precision of the light guide plate injection mold.

[0004] Therefore, there are defects and deficiencies in the existing technology, which need further improvement and development. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that, in response to the above-mentioned defects of the prior art, a needle roller injection molding retainer, a needle roller structure and a light guide plate injection mold are provided, aiming to solve the problem in the prior art that multiple needle rollers in the light guide plate injection mold cannot be fixed and regularly positioned, resulting in unstable contact surface.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a needle roller injection molded cage, comprising:

[0007] Cage body;

[0008] A plurality of needle roller placement grooves, the needle roller placement grooves are opened on the retainer body along the thickness direction, and the needle roller placement grooves are used to fix the needle rollers;

[0009] The needle roller placement groove is provided with fixed side groove walls, and needle roller fixing baffles are provided on both ends of the fixed side groove walls. The needle roller fixing baffles are provided with recesses adapted to the needle rollers.

[0010] Furthermore, the needle roller fixed baffle further includes:

[0011] a first limiting boss, the first limiting boss being arranged at an upper end of the recess along a thickness direction;

[0012] A second limiting boss is provided at a lower end of the recess along a thickness direction.

[0013] Furthermore, the first limiting boss, the recess and the second limiting boss are configured as continuous arc-shaped surfaces.

[0014] Furthermore, the notch is arranged in a direction perpendicular to the fixed side groove wall.

[0015] Furthermore, the fixed side groove wall includes a first fixed side groove wall and a second fixed side groove wall that are oppositely arranged;

[0016] The needle roller fixing baffles are correspondingly provided at both ends of the first fixed side groove wall and the second fixed side groove wall in the extending direction.

[0017] Furthermore, the four side peripheries of the retainer body are configured as demoulding conical surfaces with preset demoulding angles.

[0018] Furthermore, the preset demoulding angle is 5° to 10°;

[0019] The first limiting boss and the second limiting boss are both configured as arc bosses;

[0020] The arc radius of the first limiting boss and the second limiting boss are both 0.5-0.8 mm.

[0021] Furthermore, the recess is configured as an arc recess, the radius of the recess is greater than the radius of the needle roller, and the difference between the radius of the recess and the radius of the needle roller is 0.1 mm;

[0022] The length of the needle roller receiving groove is greater than the length of the needle roller, and the difference between the length of the needle roller receiving groove and the length of the needle roller is 0.3 mm to 0.5 mm;

[0023] The width of the needle roller receiving groove is greater than the diameter of the needle roller, and the difference between the width of the needle roller receiving groove and the diameter of the needle roller is 0.1 mm;

[0024] The height of the needle roller fixed baffle relative to the fixed side groove wall is 0.25 mm, and the extension length of the needle roller fixed baffle is 2 mm.

[0025] Another technical solution adopted by the present invention to solve the technical problem is as follows: a needle roller structure, which includes the needle roller injection molded cage as described above;

[0026] The number of the needle rollers is consistent with the number of the needle roller placement slots, and the needle rollers are engaged with the needle roller placement slots in a one-to-one correspondence.

[0027] Another technical solution adopted by the present invention to solve the technical problem is as follows: a light guide plate injection mold, the light guide plate injection mold includes the needle roller structure as described above.

[0028] Beneficial effects: The present invention provides a needle roller injection molding retainer, a needle roller structure, and a light guide plate injection molding mold. The needle roller injection molding retainer includes a retainer body; a plurality of needle roller placement grooves, wherein the needle roller placement grooves are provided on the retainer body along the thickness direction; wherein the needle roller placement grooves are provided with fixed side groove walls, and needle roller fixing baffles are provided at both ends of the fixed side groove walls, and the needle roller fixing baffles are provided with recesses adapted to the needle rollers. By providing needle roller placement grooves for fixing needle rollers on the retainer body, a plurality of needle rollers can be integrated into the needle roller injection molding retainer, thereby assisting in fixing and regulating the relative positions of the needle rollers and forming a stable contact surface, thereby facilitating the assembly of needle rollers on the precision motion cavity parts of the light guide plate injection molding mold, and improving the protection effect of the needle roller multi-motion cavity parts, thereby improving the service life of the light guide plate injection molding mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the three-dimensional structure of the needle roller injection molded cage provided in the present invention;

[0030] Figure 2 This invention Figure 1 Enlarged schematic diagram in the middle;

[0031] Figure 3 1 is a partial top view of the needle roller injection molded cage provided in the present invention;

[0032] Figure 4 1 is a partial cross-sectional view of the needle roller injection molded cage provided in the present invention along the thickness direction;

[0033] Figure 5 In the present invention Figure 3 Schematic diagram of the deformed structure in ;

[0034] Figure 6 It is a three-dimensional schematic diagram of the needle roller structure provided in the present invention;

[0035] Description of reference numerals:

[0036] 1. Needle roller structure; 10. Needle roller injection molding cage; 20. Needle roller; 11. Needle roller placement groove; 12. Needle roller fixing baffle; 13. Cage body; 111. Fixed side groove wall; 112. First fixed side groove wall; 113. Second fixed side groove wall; 121. Notch; 122. First limiting boss; 123. Second limiting boss; 131. Demolding cone. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clear and distinct, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] Light guide plate injection molds typically include a movable mold and a fixed mold. When the movable and fixed molds are opened and closed, several precisely matched moving cavity parts within them typically engage in relative sliding surface contact. However, this surface-contact sliding structure often results in excessive resistance and is prone to mutual damage between the moving cavity parts. To mitigate the problem of surface-contact sliding between the moving cavity parts, prior art techniques typically create gaps between the moving cavity parts and insert needle rollers within the gaps. However, the needle rollers are free between the moving cavity parts, resulting in a chaotic and uncontrollable positioning of the multiple needle rollers, which in turn reduces the product precision of the light guide plate injection mold. Based on the problem of messy positions between multiple needle rollers in the light guide plate injection mold in the prior art, the present invention provides a needle roller injection molding retainer, a needle roller structure and a light guide plate injection mold. By arranging a needle roller placement groove for fixing the needle roller on the retainer body, a plurality of needle rollers can be integrated on the needle roller injection molding retainer, so that the multiple needle rollers can maintain and regularize relative positions under the action of the retainer body, forming a stable contact surface, thereby improving the injection molding accuracy of the light guide plate injection mold, and at the same time, achieving line contact between the moving cores through multiple needle rollers, reducing the running resistance between the running cores, improving the protection effect of the needle rollers on the moving cavity parts, and improving the service life of the light guide plate injection mold. For details, please refer to the following embodiments.

[0039] Please refer to Figures 1 to 3 In the first embodiment of the present invention, a needle roller injection molding retainer 10 is provided, which includes: a retainer body 13 and a needle roller placement groove 11; the needle roller placement groove 11 is opened on the retainer body 13 along the thickness direction, and is used to fix the needle rollers in a one-to-one correspondence; the needle roller placement groove 11 is provided with a fixed side groove wall 111, and the two ends of the fixed side groove wall 111 are provided with a needle roller fixing baffle 12 with a recess 121 adapted to the needle roller.

[0040] It can be understood that the needle roller placement groove 11 passes through the retaining frame body 13 in the thickness direction, and the needle roller placement groove 11 is provided with a plurality of (one or more) needle rollers, and a needle roller is installed in one needle roller placement groove 11, and when the needle roller is installed in the needle roller placement groove 11, the needle roller can rotate relative to the needle roller placement groove 11, and the needle rollers at both ends along the thickness direction are protruding relative to the two end surfaces of the retaining frame body 13; by providing a needle roller fixing baffle 12 with a recess 121 adapted to the needle roller on both ends of the fixed side groove wall 111, it is convenient for the needle roller to roll in the needle roller placement groove 11 retaining frame body 13. The needle roller placement groove 11 is used for the disassembly and assembly operation of the needle roller placement groove 11; by arranging the needle roller placement groove 11 for fixing the needle roller on the retaining frame body 13, a plurality of needle rollers can be integrated on the needle roller injection molding retaining frame 10, so that the plurality of needle rollers maintain relative positions under the action of the retaining frame body 13, and assist in fixing and regularizing the relative positions between the needle rollers, forming a stable contact surface, and improving the injection molding accuracy of the light guide plate injection mold. At the same time, the linear contact between the moving cores is achieved through the plurality of needle rollers, which reduces the running resistance between the running cores, improves the protection effect of the needle rollers on the moving cavity parts, and improves the service life of the light guide plate injection mold.

[0041] In some preferred embodiments, the needle roller fixing baffle 12 also includes: a first limiting boss 122 and a second limiting boss 123, wherein the first limiting boss 122 is arranged at the upper end of the recess 121 along the thickness direction; the second limiting boss 123 is arranged at the lower end of the recess 121 along the thickness direction.

[0042] It can be understood that by setting the first limiting boss 122 and the second limiting boss 123, the needle roller can be conveniently installed in the needle roller receiving groove 11, and clamped on the needle roller fixing baffle 12 at both ends of the extension direction of the fixed side groove wall 111 of the needle roller receiving groove 11, and can also play a certain limiting and fixing role on the needle roller, and also reduce the resistance of the needle roller when rotating relative to the retaining frame body 13.

[0043] In some other preferred embodiments, the first limiting boss 122 , the recess 121 and the second limiting boss 123 are configured as continuous arc-shaped surfaces.

[0044] It can be understood that by setting the first limiting boss 122 and the second limiting boss 123, the needle roller can be conveniently installed into the needle roller placement groove 11, and the needle roller can be conveniently removed from the needle roller placement groove 11. The structural integrity of the needle roller can also be protected, and the resistance of the needle roller when rotating relative to the retaining frame body 13 can be reduced.

[0045] In other preferred embodiments, the recess 121 is arranged in a direction perpendicular to the fixed side groove wall 111. It can be understood that by controlling the recess 121 to be arranged in a direction perpendicular to the fixed side groove wall 111, the depth of the recess 121 can be increased within a limited space, thereby improving the clamping effect of the needle roller receiving groove 11 on the needle roller.

[0046] In some other preferred embodiments, the fixed side groove wall 111 includes a first fixed side groove wall 112 and a second fixed side groove wall 113 that are arranged opposite to each other; needle roller fixing baffles 12 are correspondingly provided at both ends of the extension direction of the first fixed side groove wall 112 and the second fixed side groove wall 113.

[0047] It can be understood that four groups of needle roller fixing baffles 12 can be set in the needle roller placement groove 11, and the four groups of needle roller fixing baffles 12 are set on the first fixed side groove wall 112 and the second fixed side groove wall 113 of the needle roller fixing baffle 12 relative to each other, which further facilitates the disassembly and assembly of the needle roller into the needle roller placement groove 11, and further reduces the rotational resistance of the needle roller relative to the retaining frame body 13.

[0048] Please refer to further Figure 4 and Figure 5 In other preferred embodiments, the four side peripheries of the retainer body 13 are configured as demolding tapered surfaces 131 having a preset demolding angle α.

[0049] It can be understood that by setting the four side peripheries of the retainer body 13 as inclined demoulding cone surfaces 131, the needle injection molding retainer 10 can be easily and quickly installed in the light guide plate injection mold; specifically, the preset demoulding angle α is 5°~10°.

[0050] In other preferred embodiments, the first limiting boss 122 and the second limiting boss 123 are configured as arc bosses; the arc radius r1 of the first limiting boss 122 and the second limiting boss 123 is both 0.5 to 0.8 mm. This allows for convenient insertion and removal of the needle roller into and from the needle roller receiving slot 11, while also protecting the needle roller's structural integrity and reducing resistance to rotation relative to the retainer body 13.

[0051] In other preferred embodiments, the recess 121 is configured as an arc recess 121, and the radius R1 of the recess 121 is 0.1mm larger than the radius of the needle roller, thereby facilitating the insertion of the needle roller into the recess 121 and providing clearance for the needle roller to rotate. The length L1 of the needle roller receiving groove 11 is 0.3mm to 0.5mm wider than the length of the needle roller; the width H2 of the needle roller receiving groove 11 is 0.1mm larger than the diameter of the needle roller; the height H1 of the needle roller fixing baffle 12 relative to the fixed side groove wall 111 is 0.25mm, and the extension length L2 is 2mm. It can be understood that by controlling the length and width of the needle roller receiving groove 11 and the length and width of the needle roller fixing baffle 12, the needle roller can be conveniently inserted into the needle roller receiving groove 11 while effectively accommodating the needle roller.

[0052] In some embodiments, the retainer body 13 of the needle roller injection molded retainer 10 is provided with 6 needle roller placement grooves 11, and the 6 needle roller placement grooves 11 are evenly spaced on the retainer body 13 in 3 rows and 2 columns; or, the retainer body 13 of the needle roller injection molded retainer 10 is provided with 9 needle roller placement grooves 11, and the 9 needle roller placement grooves 11 are evenly spaced on the retainer body 13 in 3 rows and 3 columns; or, the retainer body 13 of the needle roller injection molded retainer 10 is provided with 12 needle roller placement grooves 11, 12 needle roller receiving slots 11 are evenly spaced in 3 rows and 4 columns on the retainer body 13; or, the retainer body 13 of the needle roller injection molded retainer 10 is provided with 15 needle roller receiving slots 11, and the 15 needle roller receiving slots 11 are evenly spaced in 3 rows and 5 columns on the retainer body 13; or, the retainer body 13 of the needle roller injection molded retainer 10 is provided with 18 needle roller receiving slots 11, and the 18 needle roller receiving slots 11 are evenly spaced in 3 rows and 6 columns on the retainer body 13. In other words, the needle roller receiving slots 11 in the needle roller injection molded retainer 10 can be arranged in multiple rows and multiple columns, a single row and multiple columns, or multiple rows and a single column. It should be emphasized that no matter how many needle roller receiving grooves 11 are provided on the needle roller injection molded retainer 10, the distance L3 or L4 between the needle roller receiving grooves 11 located at the edge of the retainer body 13 and the demolding cone surface 131 is not less than 2 mm, thereby ensuring the structural strength of the needle roller injection molded retainer 10.

[0053] Please refer to further Figure 6In the second embodiment of the present invention, a needle roller structure 1 is further provided, which includes a needle roller 20 and the needle roller injection molding retainer 10 as described above; the number of the needle rollers 20 is consistent with the number of the needle roller receiving grooves 11, and the needle rollers 20 are clamped in a one-to-one correspondence with the needle roller receiving grooves 11.

[0054] It can be understood that the needle roller structure 1 provided in this embodiment can evenly install the needle roller 20 in the needle roller injection molding retainer 10 by adopting the needle roller injection molding retainer 10 provided in the present invention, so that the multiple needle rollers 20 maintain relative positions under the action of the retainer body 13, assist in fixing and regularizing the relative positions between the needle rollers 20, form a stable contact surface, and improve the injection molding accuracy of the light guide plate injection mold. At the same time, line contact between the moving cores is achieved through multiple needle rollers 20, which reduces the running resistance between the running cores, improves the protection effect of the needle rollers 20 on the moving cavity parts, and improves the service life of the light guide plate injection mold.

[0055] A second embodiment of the present invention further provides a light guide plate injection mold, which includes the needle roller structure described above.

[0056] In summary, the needle roller injection molding retainer, needle roller structure, and light guide plate injection molding mold provided by the present invention include a retainer body; a plurality of needle roller placement grooves, wherein the needle roller placement grooves are provided on the retainer body along the thickness direction; wherein the needle roller placement grooves are provided with fixed side groove walls, and needle roller fixing baffles are provided at both ends of the fixed side groove walls, and the needle roller fixing baffles are provided with recesses adapted to the needle rollers. By providing needle roller placement grooves for fixing needle rollers on the retainer body, a plurality of needle rollers can be integrated into the needle roller injection molding retainer, thereby assisting in fixing and regulating the relative positions of the needle rollers, forming a stable contact surface, thereby facilitating the assembly of needle rollers on the precision motion cavity parts of the light guide plate injection molding mold, and improving the protection effect of the needle roller multi-motion cavity parts, thereby improving the service life of the light guide plate injection molding mold.

[0057] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A needle roller injection molded cage, characterized in that: include: Cage body; A plurality of needle roller placement grooves, the needle roller placement grooves are opened on the retainer body along the thickness direction, and the needle roller placement grooves are used to fix the needle rollers; The needle roller placement groove is provided with a fixed side groove wall, and needle roller fixing baffles are provided on both ends of the fixed side groove wall, and the needle roller fixing baffles are provided with a notch adapted to the needle roller; The needle roller fixed baffle also includes: a first limiting boss, the first limiting boss being arranged at an upper end of the recess along a thickness direction; a second limiting boss, the second limiting boss being arranged at a lower end of the recess along a thickness direction; The first limiting boss, the recess and the second limiting boss are configured as continuous arc surfaces; The notch is configured as an arc notch, the radius of the notch is greater than the radius of the needle roller, and the difference between the radius of the notch and the radius of the needle roller is 0.1 mm; The length of the needle roller receiving groove is greater than the length of the needle roller, and the difference between the length of the needle roller receiving groove and the length of the needle roller is 0.3 mm to 0.5 mm; The width of the needle roller receiving groove is greater than the diameter of the needle roller, and the difference between the width of the needle roller receiving groove and the diameter of the needle roller is 0.1 mm; The height of the needle roller fixed baffle relative to the fixed side groove wall is 0.25 mm, and the extension length of the needle roller fixed baffle is 2 mm; The plurality of needle rollers maintain relative positions under the action of the retainer body, assist in fixing and regulating the relative positions between the needle rollers, and form a stable contact surface; linear contact between the moving cores is achieved through the plurality of needle rollers, thereby reducing the running resistance between the running cores; the recess is arranged in a direction perpendicular to the fixed side groove wall.

2. The needle roller injection molded cage according to claim 1, characterized in that: The fixed side groove wall includes a first fixed side groove wall and a second fixed side groove wall that are arranged opposite to each other; the needle roller fixing baffles are correspondingly arranged at both ends of the first fixed side groove wall and the second fixed side groove wall in the extending direction.

3. The needle roller injection molded cage according to claim 1, characterized in that: The four side peripheries of the retainer body are configured as demoulding conical surfaces with preset demoulding angles.

4. The needle roller injection molded cage according to claim 3, characterized in that: The preset demoulding angle is 5° to 10°; The first limiting boss and the second limiting boss are both configured as arc bosses; The arc radius of the first limiting boss and the second limiting boss are both 0.5-0.8 mm.

5. A needle roller structure, characterized in that: comprising the needle roller injection molded cage according to any one of claims 1 to 4; The number of the needle rollers is consistent with the number of the needle roller placement slots, and the needle rollers are engaged with the needle roller placement slots in a one-to-one correspondence.

6. A light guide plate injection mold, characterized in that: The light guide plate injection mold includes the needle roller structure as claimed in claim 5.

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