Insert scratch-proof insert structure

Abstract

The utility model relates to the technical field of mould structure, specifically relates to a mould structure of preventing inlay scratch, include: inlay and mould, inlay is embedded in mould and is along the first direction gap sliding fit with mould, and the inside of mould is provided with perforation to inlay and is set up, perforation is away from the orifice area of product cavity and is annular fixed mounting has multiple groups of rolling unit, and each group of rolling unit includes along the first direction interval arrangement multiple rolling pieces, and the envelope surface that each group of rolling unit multiple rolling pieces edge line close to inlay side is commonly formed with the inner wall surface of perforation and is opposite and conforms, and the outer surface of multiple rolling pieces and inlay rolling contact. The first direction is vertical direction, a mould structure of preventing inlay scratch in the utility model reduces the friction between mould and inlay, and further reduces the resistance of inlay or mould movement, prevents inlay multiple relative mould movement and appears the situation that mould is jammed and is scratched, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of mold core structure technology, and in particular to a mold core structure that prevents scratches on inserts. Background Technology

[0002] Inserts are a technical term in the mold manufacturing industry, specifically referring to irregularly shaped components embedded inside a mold. Their core functions include mold plate positioning, gap filling, and assisting in the coordinated operation of the molding system. In injection molds, inserts work in conjunction with the mold plate to achieve the precise construction of the plastic part's molding cavity, while also undertaking auxiliary functions such as runner guidance and cold material storage.

[0003] In the prior art, inserts are embedded in the mold core and together with the mold core form the product cavity. According to the design requirements of the mold, there are working conditions where the insert and the mold core move relative to each other. Usually, the mold core and the insert are in a sliding fit with a gap (the gap is less than 0.02 mm). However, in actual production, due to processing errors, the insert and the mold core move relative to each other for a long time, which can easily cause the insert to get stuck and scratched. Now, a mold core structure to prevent insert scratches is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a mold core structure that prevents inserts from being scratched, so as to solve the problem in the prior art where inserts are easily jammed and scratched due to long-term relative movement between the inserts and the mold core.

[0005] The technical solution of this utility model is: a mold core structure for preventing scratches from inserts, comprising: an insert and a mold core, wherein the insert is embedded in the mold core and slides with the mold core in a first direction with a gap, and a through hole is provided inside the mold core for the insert to pass through; The perforation area away from the product cavity has multiple sets of rolling units fixedly installed in a ring shape, and each set of rolling units includes multiple rolling elements arranged at intervals along the first direction. The envelope surface formed by the edge lines of the multiple rolling elements near the insert side of each group of rolling units is aligned and conforms to the inner wall surface of the perforation, and the outer surfaces of the multiple rolling elements are in rolling contact with the insert.

[0006] Preferably, the cross-section of the perforation includes, but is not limited to, a rectangle, a polygon, or a closed profile composed of straight line segments, and the central axis of each of the rolling elements is perpendicular to the first direction; The first direction is the vertical direction.

[0007] Preferably, each set of rolling units is a needle roller plate, and the perforation of the mold core, away from the product cavity, has a groove for mounting the needle roller plate facing downward and inward, and the height of the needle roller plate is equal to the depth of the groove in the vertical direction.

[0008] Preferably, the needle roller plate includes a plate body, the rolling element is a needle roller, and the needle roller is rotatably mounted on the plate body; The height of the plate is equal to the depth of the slot in the vertical direction; The slot is a rectangular parallelepiped.

[0009] Preferably, each of the said needle roller plate inserts is blocked and fixed in the slot.

[0010] Preferably, the insert is fixedly mounted on the pad, which is located above plate A and fixed to the top plate.

[0011] Preferably, the bottom surface of the pad is provided with a mounting groove, and the A plate is provided with a through groove in the vertical direction corresponding to the mounting groove for the insert to pass through.

[0012] Preferably, the mold core is an upper mold core, which is fixed on plate A. When the needle roller plate is installed in the slot, plate A abuts against the top surface of the plate body.

[0013] Preferably, the top surface of the insert is interference-fitted with a positioning pin, and the lower end of the pad is provided with a pin hole corresponding to the positioning pin. The insert has a threaded hole on its top surface, and the pad has a threaded through hole in the vertical direction. The insert is fixed to the pad by bolts.

[0014] Compared with the prior art, the advantages of this utility model are: This utility model discloses a mold core structure for preventing insert scratches, comprising an insert and a mold core. A through hole is formed inside the mold core for the insert to pass through. Multiple sets of roller plates are fixedly installed in a ring shape in the area of ​​the through hole away from the product cavity. This utility model reduces the contact area between the mold core and the insert, thereby reducing the friction between the mold core and the insert, and thus reducing the resistance to the movement of the insert or the mold core. This prevents the insert from repeatedly moving relative to the mold core and causing the mold core to jam and scratch. It is highly practical. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 A schematic diagram of the mold for installing a mold core structure that prevents scratching of inserts according to this utility model; Figure 2 A cross-sectional view of the mold at point AA for installing a mold core structure that prevents scratching of inserts according to this utility model. Figure 3 for Figure 2 A schematic diagram of the enlarged mechanism at point A; Figure 4 A top view of a portion of the structure of a mold for installing a mold core structure to prevent scratching of inserts according to this utility model; Figure 5 for Figure 4 Schematic diagram of the structure at point BB; Figure 6 This is a schematic diagram of the assembly structure of the insert, mold core, and needle roller plate described in this utility model; Figure 7 This is a schematic diagram of the assembly structure of the mold core and the needle roller plate described in this utility model.

[0016] Among them: 1. Top plate, 2. Pad plate, 3. A plate, 4. Insert, 5. Mold core, 6. Perforation, 7. Needle roller plate, 8. Plate body, 9. Needle roller, 10. Groove, 11. Mounting groove, 12. Through groove, 13. Locating pin, 14. Threaded through hole, 15. Threaded hole. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments: In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0018] In this embodiment, a mold core 5 structure designed to prevent scratching of the insert 4 can be applied in situations where the insert 4 is fixed and the mold core 5 moves, or in situations where the insert 4 moves and the mold core 5 is fixed. For example... Figures 1-4 , Figure 6 As shown, a mold core 5 structure for preventing scratches from the insert 4 includes: an insert 4 and a mold core 5. The insert 4 is embedded in the mold core 5 and slides with the mold core 5 along a first direction with a gap. A through hole 6 is formed inside the mold core 5 (e.g., ...). Figure 7 As shown, the insert 4 is inserted through the perforation 6. Multiple sets of rolling units are fixedly installed in a ring shape in the area of ​​the perforation 6 away from the product cavity. Each set of rolling units includes multiple rolling elements spaced apart along a first direction. The envelope surface formed by the edge lines of the multiple rolling elements near the insert 4 of each set of rolling units is aligned and conformal with the inner wall surface of the perforation 6. That is, the edge lines of the multiple rolling elements near the insert 4 are aligned with the inner wall surface of the perforation 6, and the outer surfaces of the multiple rolling elements are in rolling contact with the insert 4. In this embodiment, the gap between the inner wall surface of the perforation 6 in the mold core 5 and the outer surface of the insert 4 directly opposite the inner wall surface is less than 0.02 mm, preventing liquid adhesive in the product cavity from overflowing into this gap.

[0019] The cross-section of the perforation 6 includes, but is not limited to, a rectangle, a polygon, or a closed contour composed of straight line segments. The central axis of each rolling element is perpendicular to the first direction. In this embodiment, the cross-section of the perforation 6 is rectangular; the first direction is the vertical direction. Figure 7 As shown, each rolling unit is a needle roller plate 7, which includes a plate body 8 and rolling elements are needle rollers 9, which are rotatably mounted on the plate body 8. In this embodiment, the needle roller plate 7 is an existing component that can be purchased and is easy to use. The perforation 6 of the mold core 5 is provided with a groove 10 for mounting the needle roller plate 7, which is located in the area away from the product cavity. The groove 10 is a cuboid groove. The mold core 5 is an upper mold core 5, which is fixed on the A plate 3. The height of the needle roller plate 7 is equal to the vertical depth of the groove 10, that is, the height of the plate body 8 is equal to the vertical depth of the groove 10. This ensures that when the needle roller plate 7 is installed in the groove 10, the A plate 3 abuts against the top surface of the plate body 8.

[0020] Regarding the installation of insert 4, as follows: Figure 2 , Figure 5 As shown, insert 4 is fixedly mounted on a pad, which is located above plate A 3 and fixed to top plate 21. A mounting groove 11 is formed on the bottom surface of the pad, and a through groove 12 is formed vertically through plate A 3 corresponding to the mounting groove 11 for insert 4 to pass through. A locating pin 13 is interference-fitted onto the top surface of insert 4, and a pin hole is formed at the lower end of the pad corresponding to the locating pin 13. The locating pin 13 positions insert 4 when it is mounted on the pad, facilitating installation. A threaded hole 15 is formed on the top surface of insert 4, and a threaded through hole 14 is formed vertically through plate A 3. Insert 4 is fixed to the pad with bolts.

[0021] Each needle roller plate 7 insert is blocked and fixed in the slot 10. In this embodiment, the process of the needle roller plate 7 being blocked and fixed in the slot 10 is as follows: First, insert the insert 4 into the mold core 5. After inserting the insert 4, insert multiple needle roller plates 7 into the slot 10 of the mold core 5 from top to bottom. Second, pass the upper end of the insert 4 through the through slot 12 of the A plate 3 and fix the mold core 5 on the A plate 3. Third, insert the positioning pin 13 fixed on the insert 4 into the pin hole at the lower end of the pad and push the insert 4 into the mounting slot 11. Lock the A plate 3 into the pad by passing the bolt from bottom to top through the A plate 3, and movably lock the A plate 3 onto the pad. Fourth, lock the insert 4 into the threaded through hole 14 of the pad from top to bottom through the bolt and lock it into the threaded hole 15 on the top surface of the insert 4, and fix the insert 4 on the pad. (At this time, the top surface of the plate body 8 of the needle roller plate 7 abuts against the A plate 3, that is, after the needle roller plate 7 is inserted into the slot 10 of the mold core 5, it is limited and fixed by the insert 4 and the A plate 3.) Figure 3(As shown), and then fix the pad onto the top plate 21. This completes the installation of the needle roller plate 7. In this embodiment, there is no need to set up an installation structure for the needle roller plate 7 in the slot 10 of the mold core 5. It is directly inserted and fixed by the insert 4 and the A plate 3, which makes the installation convenient.

[0022] In the prior art, the mold core 5 does not have a roller plate 7, and the inner wall surface of the through hole 6 of the mold core 5 and the insert 4 have surface-to-surface friction. In this invention, the roller plate 7 is provided so that when the mold core 5 moves relative to the insert 4, the roller 9 and the insert 4 have rolling contact. This invention reduces the friction between the mold core 5 and the insert 4 by reducing the contact area between the mold core 5 and the insert 4, thereby reducing the resistance to the movement of the insert 4 (for the case where the insert 4 moves and the mold core 5 is fixed) or the mold core 5 (for the case where the insert 4 is fixed and the mold core 5 moves), and preventing the mold core 5 from getting stuck and scratched due to repeated movement of the insert 4 relative to the mold core 5. Of course, it should be noted that if only the groove 10 is provided on the mold core 5, and the needle roller plate 7 is not installed in the groove 10, although the contact area between the mold core 5 and the insert 4 is reduced, the groove 10 lacks support for the insert 4. The insert 4 will still get stuck and scratched due to repeated relative movements between the insert 4 and the mold core 5. That is, the needle roller plate 7 in this utility model forms a rolling support structure in the groove of the mold core 5. The needle roller plate 7 reduces the friction between the mold core 5 and the insert 4, and can also play a positioning and guiding role.

[0023] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A mold core structure for preventing scratches on inserts, characterized in that, include: The insert and the mold core are provided, wherein the insert is embedded in the mold core and slides with the mold core in a first direction with a gap, and the mold core has a through hole for the insert to pass through. The perforation area away from the product cavity has multiple sets of rolling units fixedly installed in a ring shape, and each set of rolling units includes multiple rolling elements arranged at intervals along the first direction. The envelope surface formed by the edge lines of the multiple rolling elements near the insert side of each group of rolling units is aligned and conforms to the inner wall surface of the perforation, and the outer surfaces of the multiple rolling elements are in rolling contact with the insert.

2. The mold core structure for preventing scratches on inserts according to claim 1, characterized in that: The cross-section of the perforation includes a rectangle, a polygon, or a closed profile composed of straight line segments, and the central axis of each of the rolling elements is perpendicular to the first direction; The first direction is the vertical direction.

3. The mold core structure for preventing scratches on inserts according to claim 1, characterized in that: Each set of rolling units is a needle roller plate. The perforation of the mold core, away from the product cavity, has a groove for mounting the needle roller plate facing downwards and inwards. The height of the needle roller plate is equal to the depth of the groove in the vertical direction.

4. The mold core structure for preventing scratches on inserts according to claim 3, characterized in that: The needle roller plate includes a plate body, and the rolling element is a needle roller, which is rotatably mounted on the plate body. The height of the plate is equal to the depth of the slot in the vertical direction; The slot is a rectangular parallelepiped.

5. The mold core structure for preventing scratches on inserts according to claim 3, characterized in that: Each of the said needle roller plate inserts is blocked and fixed in the slot.

6. The mold core structure for preventing scratches on inserts according to claim 1, characterized in that: The insert is fixedly mounted on the pad, which is located above plate A and fixed to the top plate.

7. The mold core structure for preventing scratches on inserts according to claim 6, characterized in that: The bottom surface of the pad is provided with an installation groove, and the A plate is provided with a through groove in the vertical direction corresponding to the installation groove for the insert to pass through.

8. The mold core structure for preventing scratches on inserts according to claim 4, characterized in that: The mold core is an upper mold core, which is fixed on plate A. When the needle roller plate is installed in the slot, plate A abuts against the top surface of the plate body.

9. A mold core structure for preventing scratches on inserts according to claim 6, characterized in that: The top surface of the insert is fixedly fitted with a positioning pin, and the lower end of the pad is provided with a pin hole corresponding to the positioning pin. The insert has a threaded hole on its top surface, and the pad has a threaded through hole in the vertical direction. The insert is fixed to the pad by bolts.

Images