Rear mold insert capable of reducing attraction force of magnet and electric wind comb rear cover magnet sleeve injection mold

Abstract

The utility model relates to the technical field of injection mold accessories, in particular to a rear mold insert capable of reducing the attraction force of a magnet. The rear mold insert is provided with a beryllium copper insert, and the rear mold insert and the beryllium copper insert can define a mounting groove used for mounting a magnet. The utility model further provides an electric wind comb rear cover magnet sleeve injection mold. Compared with the prior art, the beryllium copper insert is arranged on the rear mold insert, and the mounting groove for mounting the magnet can be defined; due to the fact that attraction force cannot be generated between the magnet and the beryllium copper insert, after the magnet is fed to the installation groove, the attraction force of the magnet can be reduced, and the problem that the magnet deviates due to the too large attraction force can be avoided; operators do not need to correct the positions of the magnets subsequently, time and labor are saved, and the production efficiency can be further improved; meanwhile, the attraction force of the magnet is greatly reduced, the magnet can be prevented from cracking when the position is corrected, the magnet can be prevented from cracking when demolding is conducted, and therefore the production reliability and the production yield are further improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold accessories technology, and in particular to a rear mold insert for reducing the magnetic attraction and a magnetic sleeve for the rear cover of an electric comb injection mold. Background Technology

[0002] In existing technologies, the casings of electronic products typically require magnets for magnetic attraction to other components or as counterweights. For example, when a magnet is installed on the back cover of a hair dryer, the magnet is usually molded simultaneously with the hair dryer back cover using an injection mold. A recess is usually provided within the molding cavity of the injection mold to hold the magnet. Before the mold closes, the magnet is loaded into the recess; closing the mold then completes the injection molding of the hair dryer back cover and the magnet is molded.

[0003] However, the inventors discovered in actual production operations that, since all components of the injection mold are made of steel, the magnet, after being installed in the recess of the injection mold, will shift due to its own attraction. Once the magnet is misaligned in the recess, it needs to be corrected, which is time-consuming and labor-intensive, seriously affecting production efficiency. Moreover, because the magnet itself is somewhat brittle, and it exerts a large attraction on the injection mold, the magnet is prone to breakage when operators apply force to correct its position, thus limiting production reliability.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a rear mold insert that reduces the magnetic attraction force, effectively solving the technical defects of low production efficiency and low production reliability of injection molds used for die-cutting magnets in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rear mold insert for reducing the magnetic attraction force, wherein a beryllium copper insert is installed on the rear mold insert, and the rear mold insert and the beryllium copper insert can form an installation groove for installing the magnet.

[0007] The beneficial effects of the rear mold insert for reducing magnetic attraction provided in this application are as follows: Compared with the prior art, by setting a beryllium copper insert in the rear mold insert, a mounting groove for installing the magnet can be formed; since no attraction is generated between the magnet and the beryllium copper insert, the attraction of the magnet can be reduced after the magnet is placed into the mounting groove, thus avoiding the problem of the magnet being misaligned due to excessive attraction; there is no need for operators to correct the position of the magnet afterward, saving time and effort and further improving production efficiency; at the same time, the attraction of the magnet is greatly reduced, which not only prevents the magnet from cracking when correcting its position, but also prevents the magnet from cracking during demolding, thereby further improving production reliability, increasing product yield, and further improving mass production.

[0008] As a preferred embodiment: the upper surface of the rear mold insert is recessed downward to provide a mounting hole for installing the beryllium copper insert, and the rear mold insert has a first notch at the top of the mounting hole;

[0009] After the beryllium copper insert is installed in the mounting hole, the upper surface of the beryllium copper insert is flush with the bottom of the first notch to form a mounting groove.

[0010] As a preferred embodiment: the side of the first notch is provided with a plurality of first abutting protrusions, and the plurality of first abutting protrusions are arranged in a circular array;

[0011] When the magnet is placed in the mounting groove, multiple first abutment protrusions can abut against the outer side of the magnet, so that the distance between the outer side of the magnet and the side of the first notch is set.

[0012] As a preferred embodiment: a positioning protrusion is provided at the center of the upper surface of the beryllium copper insert, and the diameter of the positioning protrusion is smaller than the diameter of the beryllium copper insert;

[0013] The first width is the distance between the outer side of the beryllium copper insert and the outer side of the positioning protrusion, and the second width is the width of the bottom surface of the first notch. The first width is greater than the second width.

[0014] As a preferred embodiment: the first height of the first notch in the vertical direction is less than the thickness of the magnet in the vertical direction, and the second height of the positioning protrusion in the vertical direction is greater than the first height of the first notch.

[0015] As a preferred embodiment: the rear mold insert is provided with a first pin hole, and the beryllium copper insert is provided with a second pin hole;

[0016] The first pin hole and the second pin hole are coaxially arranged, and the beryllium copper insert is fixedly installed by inserting the first pin into the first pin hole and the second pin hole.

[0017] This application also provides an injection mold for a magnetic sleeve on the back cover of an electric comb, with a back mold insert for reducing the magnetic attraction force.

[0018] The beneficial effects of the injection mold for the back cover magnet sleeve of the electric comb provided in this application are as follows: Compared with the prior art, by setting a back mold insert to reduce the magnetic attraction force, the attraction force generated between the magnet and the back mold insert is reduced by more than 50%, which can avoid the problem of magnet misalignment due to excessive attraction force. Subsequently, there is no need for operators to correct the position of the magnet, saving time and effort and further improving production efficiency. At the same time, the magnetic attraction force is greatly reduced, which not only prevents the magnet from cracking when correcting its position, but also prevents the magnet from cracking during demolding, thereby further improving production reliability, increasing product yield, and further improving mass production.

[0019] As a preferred solution: the injection mold for the magnetic sleeve of the electric comb back cover includes...

[0020] The lower mold base has a first forming cavity at the top;

[0021] The upper mold base is movably installed on top of the lower mold base, and a second molding cavity is provided at the bottom of the upper mold base;

[0022] The first movable seat is movably installed at the bottom of the lower mold base; the rear mold insert is installed at the top of the first movable seat;

[0023] When the first movable seat moves upward relative to the lower mold seat, the beryllium copper insert can be inserted into the first molding cavity. When the upper mold seat moves downward relative to the lower mold seat, the first molding cavity and the second molding cavity can be injection molded to form the back cover of the electric comb and fitted with a magnet.

[0024] As a preferred embodiment: the top of the lower mold base is provided with multiple first rows, which are arranged in a circular array;

[0025] The first row is provided with a first inclined guide hole, and the top of the upper mold base is provided with a first inclined guide rod that is adapted to the first inclined guide hole;

[0026] When the upper mold base moves down relative to the lower mold base, the first inclined guide rod can be inserted into the first inclined guide hole and move inward to form the first molding cavity.

[0027] As a preferred embodiment: the bottom of the rear mold insert is provided with a fixing seat, which is fixedly installed on the top of the first movable seat;

[0028] The lower mold base is provided with through holes that penetrate its upper and lower surfaces. When the first movable base moves up and down, the rear mold insert can enter or exit the first molding cavity through the through holes. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the rear mold insert for reducing magnetic attraction provided in an embodiment of this application;

[0031] Figure 2 yes Figure 1 A partial three-dimensional structural diagram of the rear mold insert for reducing magnetic attraction is shown.

[0032] Figure 3 yes Figure 2 The diagram shows a full cross-sectional view of the rear mold insert used to reduce magnetic attraction.

[0033] Figure 4 yes Figure 3 A magnified view of a portion of the rear mold insert used to reduce magnetic attraction;

[0034] Figure 5 yes Figure 2 The diagram shows a rear mold insert for mounting magnets to reduce magnet attraction.

[0035] Figure 6 yes Figure 4 The diagram shows a rear mold insert for mounting magnets to reduce magnet attraction.

[0036] Figure 7 yes Figure 1 The diagram shows a three-dimensional structure of the rear mold insert for reducing magnetic attraction installed on the mold for the magnetic sleeve of the back cover of the electric comb.

[0037] Figure 8 yes Figure 7 The diagram shows a three-dimensional structure of the lower mold base and the first movable base of the die for the back cover magnet sleeve of the electric comb.

[0038] Figure 9 yes Figure 7 The diagram shows a three-dimensional view of the upper mold base of the electric comb back cover magnet sleeve die from another angle.

[0039] Figure 10 yes Figure 7 The diagram shows a full cross-section of the mold for the magnetic sleeve of the back cover of the electric comb:

[0040] Figure 11 yes Figure 7 The diagram shows a three-dimensional structural schematic of the back cover of the electric comb, which is injection molded using a die to form the magnet sleeve.

[0041] 10. Rear mold insert; 11. Beryllium copper insert; 111. Positioning protrusion; 12. Mounting groove; 13. Mounting hole; 14. First notch; 141. First abutting protrusion; 15. First pin hole; 16. Second pin hole; 17. First pin; 18. Fixing base;

[0042] 20. Magnet;

[0043] 30. Injection mold for the magnetic sleeve of the electric comb back cover; 31. Lower mold base; 311. First molding cavity; 312. First sliding block; 3121. Molding column; 3122. Spring; 313. First inclined guide hole; 32. Upper mold base; 321. Second molding cavity; 322. First inclined guide rod; 33. First movable seat; 34. Guide post; 35. Guide hole; 36. Glue inlet;

[0044] 40. Back cover of the electric comb;

[0045] w1, first width; w2, second width; h1, first height; h2, second height. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0048] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 this application 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 this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0051] Please refer to the following: Figures 1 to 6 The rear mold insert 10 for reducing magnetic attraction provided in the embodiments of this application will now be described.

[0052] The rear mold insert 10 is fitted with a beryllium copper insert 11, and the rear mold insert 10 and the beryllium copper insert 11 can form a mounting groove 12 for mounting a magnet. After the magnet is installed in the mounting groove 12, most of the magnet can abut against the beryllium copper insert 11, and the remaining small part abuts against the rear mold insert 10, thereby reducing the attraction between the magnet and the rear mold insert 10. Compared with the prior art, by setting the beryllium copper insert 11 in the rear mold insert 10 and forming the mounting groove 12 for installing the magnet, since there is no attraction between the magnet and the beryllium copper insert 11, the attraction of the magnet can be reduced after the magnet is loaded into the mounting groove 12, which can avoid the problem of the magnet being misaligned due to excessive attraction. Subsequently, there is no need for operators to correct the position of the magnet, saving time and effort and further improving production efficiency. At the same time, the attraction of the magnet is greatly reduced, which can not only prevent the magnet from cracking when correcting its position, but also prevent the magnet from cracking when demolding, thereby further improving production reliability, increasing product yield, and further improving mass production.

[0053] Please refer to the following: Figures 1 to 6 The upper surface of the rear mold insert 10 is recessed downward to provide a mounting hole 13 for installing the beryllium copper insert 11. The rear mold insert 10 has a first notch 14 at the top of the mounting hole 13. When the beryllium copper insert 11 is installed in the mounting hole 13, the upper surface of the beryllium copper insert 11 is flush with the bottom of the first notch 14 to form a mounting groove 12.

[0054] Specifically, the first notch 14 has a plurality of first abutting protrusions 141 on its side, and the plurality of first abutting protrusions 141 are arranged in a circular array; when the magnet 20 is placed in the mounting groove 12, the plurality of first abutting protrusions 141 can abut against the outer side of the magnet 20, so that the distance between the outer side of the magnet 20 and the side of the first notch 14 is set.

[0055] Preferably, the side of the first abutting protrusion 141 extends toward the center of the first notch 14 and occupies half of the first notch 14 in the left-right direction, so that after the magnet is installed in the mounting groove 12, the bottom of the magnet abuts against half of the first notch 14, and the side of the magnet is only abutted and positioned by multiple first abutting protrusions 141, thereby further reducing the possibility of the magnet generating attraction on the rear mold insert 10.

[0056] It should be noted that the magnet does not completely avoid attraction with the rear mold insert 10. According to the above-mentioned structure, the attraction of the magnet to the rear mold insert 10 can be reduced to 50%. This structure can ensure that the magnet is not easily misaligned when the electric fan is being used to install the rear cover, and can also ensure that the magnet will not be misaligned due to magnetism after being placed in the mounting groove 12. This improves production efficiency and yield.

[0057] In some other embodiments of this application, since the magnet needs to be injection molded together with the electric air conveyor back cover, and the magnet is a ring-shaped magnet with a through hole, a positioning protrusion 111 is provided at the center of the upper surface of the beryllium copper insert 11, and the diameter of the positioning protrusion 111 is smaller than the diameter of the beryllium copper insert 11. During the injection molding of the electric air conveyor back cover, hot melt slurry can enter the gap between the magnet and the positioning protrusion 111, and after the hot melt slurry cools, the magnet can be fitted onto the electric air conveyor back cover.

[0058] Furthermore, the outer surface of the beryllium copper insert 11 and the outer surface of the positioning protrusion 111 have a first width w1, and the width of the bottom surface of the first notch 14 is a second width w2, with the first width w1 being greater than the second width w2. The first height h1 in the vertical direction of the first notch 14 is less than the thickness of the magnet 20 in the vertical direction, and the second height h2 in the vertical direction of the positioning protrusion 111 is greater than the first height h1 of the first notch 14. This structure can further improve the operational reliability and production yield of the electro-pneumatic transmission rear cover sleeve magnet.

[0059] In some embodiments of this application, the beryllium copper insert 11 is fixedly installed on the rear mold insert 10 by the first pin 17; when it is necessary to replace different beryllium copper inserts 11, different beryllium copper inserts 11 can be replaced by removing the first pin 17, so that the rear mold insert 10 can be adapted to use a variety of different types and sizes of beryllium copper inserts 11, and its versatility is further enhanced.

[0060] Specifically, the rear mold insert 10 is provided with a first pin hole 15, and the beryllium copper insert 11 is provided with a second pin hole 16; the first pin hole 15 and the second pin hole 16 are coaxially arranged, and the beryllium copper insert 11 is fixedly installed by inserting the first pin 17 into the first pin hole 15 and the second pin hole 16.

[0061] Please refer to the following: Figures 7 to 11This application embodiment also provides an injection mold 30 for the back cover magnet sleeve of an electric comb. The injection mold 30 for the back cover magnet sleeve of an electric comb is equipped with a rear mold insert 10 to reduce the magnetic attraction force. Compared with the prior art, by setting the rear mold insert 10 to reduce the magnetic attraction force, the attraction force generated between the magnet and the rear mold insert 10 is reduced by more than 50%, which can avoid the problem of the magnet being misaligned due to excessive attraction force. Subsequently, there is no need for operators to correct the position of the magnet, saving time and effort and further improving production efficiency. At the same time, the magnetic attraction force is greatly reduced, which not only prevents the magnet from cracking when correcting its position, but also prevents the magnet from cracking during demolding, thereby further improving production reliability, increasing product yield, and further improving mass production.

[0062] Specifically, the injection mold 30 for the magnetic sleeve of the electric comb rear cover includes a lower mold base 31, an upper mold base 32, and a first movable seat 33. The upper mold base 32 is movably installed on the top of the lower mold base 31, and the first movable seat 33 is movably installed on the bottom of the lower mold base 31. The lower mold base 31 has a first molding cavity 311 at its top, and the upper mold base 32 has a second molding cavity 321 at its bottom. The rear mold insert 10 is installed on the top of the first movable seat 33. When the injection mold 30 for the back cover magnet of the electric comb is installed in the injection molding machine, the injection molding machine can drive the upper mold base 32 to move up and down relative to the lower mold base 31, and the injection molding machine can drive the first movable seat 33 to move up and down relative to the lower mold base 31. When the first movable seat 33 moves up relative to the lower mold base 31, the beryllium copper insert 11 can be inserted into the first molding cavity 311. When the upper mold base 32 moves down relative to the lower mold base 31, the first molding cavity 311 and the second molding cavity 321 can be injection molded to form the back cover 40 of the electric comb and fitted with the magnet.

[0063] In some embodiments of this application, the top of the lower mold base 31 is provided with a plurality of first row positions 312, which are arranged in a circular array; the first row positions 312 are provided with first inclined guide holes 313, and the top of the upper mold base 32 is provided with a first inclined guide rod 322 adapted to the first inclined guide hole 313; when the upper mold base 32 moves down relative to the lower mold base 31, the first inclined guide rod 322 can be inserted into the first inclined guide hole 313 and act on the first row positions 312 to move inward to form the first molding cavity 311.

[0064] Specifically, the bottom of the rear mold insert 10 is provided with a fixing seat 18, which is fixedly installed on the top of the first movable seat 33 by means of screws; the lower mold seat 31 is provided with a through hole through its upper and lower surfaces, so that when the first movable seat 33 moves up and down, the rear mold insert 10 can enter or exit the first molding cavity 311 through the through hole.

[0065] In some other embodiments of this application, the side of the first slide 312 facing the first molding cavity 311 is provided with a plurality of molding pillars 3121 for injection molding the through holes of the back cover of the comb. A spring is connected between the first slide 312 and the lower mold base 31. When the upper mold base 32 opens up and down relative to the lower mold base 31, the spring can provide an elastic force for the first slide 312 to move outward, assisting the first slide 312 to move outward and complete the demolding of the first slide 312 and the back cover of the comb.

[0066] It is understandable that between the upper mold base 32 and the lower mold base 31, one is provided with a guide post 34 and the other is provided with a guide hole 35 for the guide post 34 to be inserted; between the lower mold base 31 and the first movable seat 33, one is provided with a guide post 34 and the other is provided with a guide hole 35 for the guide post 34 to be inserted; thereby ensuring the reliability of the displacement of the upper mold base 32 relative to the lower mold base 31 and the displacement of the first movable seat 33 relative to the lower mold base 31.

[0067] In addition, the upper mold base 32 is provided with a glue inlet 36, which can be connected to the second molding cavity 321. When the upper mold base 32 and the lower mold base 31 are closed, the hot melt slurry can be injected into the first molding cavity 311 and the second molding cavity 321 through the glue inlet 36 to injection mold the electric comb back cover 40.

[0068] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A rear mold insert for reducing magnetic attraction, characterized in that: The rear mold insert (10) is fitted with a beryllium copper insert (11), and the rear mold insert (10) and the beryllium copper insert (11) can form a mounting groove (12) for mounting a magnet. The upper surface of the rear mold insert (10) is recessed downward to provide a mounting hole (13) for mounting a beryllium copper insert, and the rear mold insert (10) has a first notch (14) at the top of the mounting hole (13). When the beryllium copper insert (11) is installed in the mounting hole (13), the upper surface of the beryllium copper insert (11) is flush with the bottom of the first notch (14) to form the mounting groove (12).

2. The rear mold insert for reducing magnetic attraction according to claim 1, characterized in that: The first notch (14) has multiple first abutting protrusions (141) on its side, and the multiple first abutting protrusions (141) are arranged in a circular array; When the magnet (20) is placed in the mounting groove (12), a plurality of first abutting protrusions (141) can abut against the outer side of the magnet (20), so that the distance between the outer side of the magnet (20) and the side of the first notch (14) is set.

3. The rear mold insert for reducing magnetic attraction according to claim 1 or 2, characterized in that: The beryllium copper insert (11) has a positioning protrusion (111) protruding upward at the center of its upper surface. The diameter of the positioning protrusion (111) is smaller than the diameter of the beryllium copper insert (11). The outer side of the beryllium copper insert (11) and the outer side of the positioning protrusion (111) are the first width (w1), and the width of the bottom surface of the first notch (14) is the second width (w2). The first width (w1) is greater than the second width (w2).

4. The rear mold insert for reducing magnetic attraction according to claim 3, characterized in that: The first height (h1) of the first notch (14) in the vertical direction is less than the thickness of the magnet (20) in the vertical direction, and the second height (h2) of the positioning protrusion (111) in the vertical direction is greater than the first height (h1) of the first notch (14).

5. The rear mold insert for reducing magnetic attraction according to claim 1, characterized in that: The rear mold insert (10) is provided with a first pin hole (15), and the beryllium copper insert (11) is provided with a second pin hole (16). The first pin hole (15) and the second pin hole (16) are coaxially arranged. The beryllium copper insert (11) is fixedly installed by inserting the first pin (17) into the first pin hole (15) and the second pin hole (16).

6. A molding die for injecting a magnetic sleeve onto the back cover of an electric comb, characterized in that: The rear mold insert (10) for reducing magnetic attraction as described in any one of claims 1-5 is installed.

7. The injection mold for the magnetic sleeve of the electric comb rear cover according to claim 6, characterized in that: The injection mold (30) for the magnetic sleeve of the electric comb back cover includes The lower mold base (31) has a first forming cavity (311) on the top. The upper mold base (32) is movably installed on the top of the lower mold base (31), and the bottom of the upper mold base (32) is provided with a second molding cavity (321). The first movable seat (33) is movably installed at the bottom of the lower mold seat (31); the rear mold insert (10) is installed at the top of the first movable seat (33); When the first movable seat (33) moves upward relative to the lower mold seat (31), the beryllium copper insert (11) can be inserted into the first molding cavity (311). When the upper mold seat (32) moves downward relative to the lower mold seat (31), the first molding cavity (311) and the second molding cavity (321) can be injection molded to form the back cover of the electric comb and fitted with a magnet.

8. The injection mold for the magnetic sleeve of the electric comb rear cover according to claim 7, characterized in that: The lower mold base (31) has a plurality of first rows (312) on its top, and the plurality of first rows (312) are arranged in a circular array; The first row position (312) is provided with a first inclined guide hole (313), and the top of the upper mold base (32) is provided with a first inclined guide rod (322) that is adapted to the first inclined guide hole (313). When the upper mold base (32) moves down relative to the lower mold base (31), the first inclined guide rod (322) can be inserted into the first inclined guide hole (313) and move inward by the first moving part (312) to form the first molding cavity (311).

9. The injection mold for the magnetic sleeve of the electric comb back cover according to claim 7 or 8, characterized in that: The bottom of the rear mold insert (10) is provided with a fixed seat (18), which is fixedly installed on the top of the first movable seat (33); the lower mold seat (31) is provided with a through hole through its upper and lower surfaces. When the first movable seat (33) moves up and down, the rear mold insert (10) can enter or exit the first molding cavity (311) through the through hole.

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