A curing process for superlinear products

Abstract

The present application relates to a kind of solidification processes of superlinear product, belong to electroacoustic device manufacturing method technical field, and superlinear product includes voice coil and diaphragm, and light curing adhesive is arranged between voice coil and diaphragm.The solidification process includes: voice coil and diaphragm are placed in curing tool, and voice coil and diaphragm are positioned using main body insert and positioning block, wherein main body insert is provided with first light transmission structure, and positioning block is provided with second light transmission structure, first light transmission structure and second light transmission structure correspond to each other in the direction of light and form the light propagation channel leading to bonding area;In the state of keeping voice coil and diaphragm positioning, make curing light pass through light propagation channel, irradiate the area in bonding area that is blocked by main body insert and / or positioning block, to make light curing adhesive at least reach the pre-cured state of limiting glue flow;And after pre-cured light curing adhesive is supplemented and cured, to make voice coil and diaphragm fixedly connected.

Description

Technical Field

[0001] This invention belongs to the technical field of electroacoustic device manufacturing methods, specifically relating to a curing process for a superlinear product. Background Technology

[0002] Superlinear products typically consist of a diaphragm, a voice coil, and structural components for supporting or positioning these parts. During assembly, the voice coil and diaphragm must maintain precise relative positions and be fixedly connected via adhesive bonding. The quality of the bond between the voice coil and diaphragm affects the transfer of vibrational energy, and further impacts the product's acoustic performance, structural stability, and reliability.

[0003] In the current manufacturing process of superlinear products, a UV-curable adhesive is typically applied between the voice coil and the diaphragm. The voice coil and diaphragm are then placed in a curing fixture, and positioned using components such as main inserts and positioning blocks. While in this positioned state, the UV-curable adhesive is irradiated with ultraviolet light to pre-cur it, restricting adhesive flow. Subsequent curing is then performed to ensure a stable connection between the voice coil and the diaphragm.

[0004] However, in some superlinear products, due to their small size and compact internal structure, the space available for curing tooling is relatively limited. For example... Figures 1-2 As shown, the main insert typically needs to extend around the voice coil or diaphragm to ensure the positioning accuracy of the voice coil and diaphragm. The positioning block also needs to be placed on the outer periphery of the product or in the corresponding positioning area. These main inserts and positioning blocks are prone to being positioned between the curing light source and the bonding area, thus obstructing the propagation of the curing light.

[0005] Especially in the middle region of the short axis of the main insert, due to limited structural space, existing main inserts typically do not have a structure that allows curing light to pass through. When ultraviolet light irradiates from outside the curing fixture, the short axis of the main insert and the positioning block on the accompanying fixture may block the ultraviolet light from entering the middle of the bonding area between the voice coil and the diaphragm, resulting in an irradiation blind spot or weak irradiation area in this region.

[0006] When the bonding area is obstructed, the adhesive located along the path of the light source receives more sufficient curing light, while the adhesive located in the middle of the short axis of the main insert or in the obstructed position of the positioning block receives less light energy, making it prone to localized uncured or insufficiently cured areas. Because the adhesive in the pre-curing stage has not yet formed sufficient structural strength, the insufficiently cured adhesive may flow and spread during pressing, handling, transfer, or subsequent curing processes, causing the adhesive to deviate from the intended bonding position.

[0007] The flow and spreading of the adhesive can lead to uneven thickness and distribution of the adhesive layer between the voice coil and the diaphragm, reducing the effective bonding area and causing differences in connection strength at different locations within the bonding zone. During product vibration or long-term use, areas with insufficient local bonding strength are prone to delamination and cracking, which can even lead to separation of the voice coil and diaphragm in severe cases. Existing processes carry risks such as incomplete curing of the adhesive in the middle, adhesive spreading, poor bonding effect, and separation of the voice coil and diaphragm.

[0008] In view of this, this solution was developed. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a curing process for superlinear products, which can improve the problem of insufficient curing of adhesive caused by the obstruction of curing fixtures during the curing process and improve the connection reliability between the voice coil and the diaphragm.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a curing process for a superlinear product, the superlinear product comprising a voice coil and a diaphragm, wherein a light-curing adhesive is disposed between the voice coil and the diaphragm, comprising the following steps: The voice coil and the diaphragm are placed in a curing fixture, and the voice coil and the diaphragm are positioned using the main body insert and the positioning block; The main body insert is provided with a first light-transmitting structure, and the positioning block is provided with a second light-transmitting structure. The first light-transmitting structure and the second light-transmitting structure correspond to each other in the direction of illumination and form a light propagation channel leading to the bonding area between the voice coil and the diaphragm. While maintaining the positioning of the voice coil and diaphragm, the curing light is transmitted through the light propagation channel to illuminate the area of ​​the bonding region that is blocked by the main body insert and / or positioning block, so that the light-cured adhesive reaches at least a pre-cured state that restricts the flow of adhesive.

[0011] Furthermore, the pre-cured light-cured adhesive is further cured to fix the voice coil to the diaphragm.

[0012] Furthermore, the first light-transmitting structure is disposed in the short axis region of the main body insert and faces the center of the bonding region.

[0013] Furthermore, both the first and second light-transmitting structures are through holes, and the projections of the first and second light-transmitting structures in the direction of curing light at least partially overlap.

[0014] Furthermore, the first light-transmitting structure is a circular through-hole with a diameter of 1 to 3 mm.

[0015] Furthermore, the first light-transmitting structure is a circular through-hole with a diameter of 2mm.

[0016] Furthermore, the effective light-transmitting area of ​​the second light-transmitting structure is greater than that of the first light-transmitting structure.

[0017] Furthermore, the first light-transmitting structure and the second light-transmitting structure are each provided with one or more; When there are multiple first light-transmitting structures and multiple second light-transmitting structures, the multiple first light-transmitting structures and multiple second light-transmitting structures are arranged at intervals along the bonding area.

[0018] Furthermore, the curing light is ultraviolet light; the pre-curing step uses an ultraviolet light source located outside the accompanying tooling to guide the ultraviolet light into the bonding area through the light propagation channel.

[0019] Furthermore, the curing process includes secondary UV curing and a combination of UV light and heat curing.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a first light-transmitting structure on the main body insert and a second light-transmitting structure on the positioning block of the accompanying tooling, so that the first light-transmitting structure and the second light-transmitting structure correspond to each other and form a curing light propagation channel, thereby enabling ultraviolet light to be introduced into the voice coil and diaphragm bonding area that was originally blocked by the main body insert and / or the positioning block, reducing the curing blind zone and improving the overall light uniformity of the bonding area.

[0021] 2. The light-transmitting structure in this invention can be adjusted according to different product sizes, bonding area positions, and curing requirements. It can employ one or more light-transmitting hole structures and is applicable to ultra-linear products of different specifications, thus improving the versatility of the curing process. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the existing main body insert mentioned in the background art of this invention; Figure 2 This is a rear view structural diagram of the existing main body insert mentioned in the background art of this invention; Figure 3 This is a front view schematic diagram of the main component in this invention; Figure 4 This is a rear view structural diagram of the main body insert in this invention.

[0023] Marked in the diagram: 1, main inlay; 11, first light-transmitting structure. Detailed Implementation

[0024] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0025] Example 1 like Figures 3-4As shown, this embodiment provides a curing process for a superlinear product, which includes a voice coil and a diaphragm, and the voice coil and diaphragm are bonded together using a UV-curable adhesive. The UV-curable adhesive is preferably an ultraviolet (UV) curable adhesive.

[0026] The curing fixture used in this embodiment includes a traveling fixture, a main insert 1, and a positioning block. The main insert 1 is used to support and position the voice coil and / or diaphragm. The positioning block is disposed on the traveling fixture and is used to limit the position of the voice coil and diaphragm during assembly and curing to ensure that the voice coil and diaphragm have a predetermined relative position.

[0027] The main insert 1 has a major axis and a minor axis that are perpendicular or substantially perpendicular to each other. A first light-transmitting structure 11 is provided in the minor axis region of the main insert 1, and a second light-transmitting structure is provided on the positioning block of the accompanying tooling. The first light-transmitting structure 11 and the second light-transmitting structure correspond to each other in the direction of ultraviolet light irradiation, so as to jointly form a light propagation channel from the outside of the curing tooling to the bonding area between the voice coil and the diaphragm.

[0028] In this embodiment, both the first light-transmitting structure 11 and the second light-transmitting structure are configured as through holes. The first light-transmitting structure 11 is located at the middle position of the short axis region of the main body insert 1, and faces the middle of the bonding area between the voice coil and the diaphragm. The second light-transmitting structure is located on the positioning block at a position corresponding to the first light-transmitting structure 11.

[0029] It is worth mentioning that the first light-transmitting structure 11 and the second light-transmitting structure can be set to multiple. Multiple first light-transmitting structures 11 are arranged at intervals along the short axis of the main body insert 1 or along the bonding area between the voice coil and the diaphragm. Multiple second light-transmitting structures are arranged at corresponding positions on the positioning block and correspond to the multiple first light-transmitting structures 11 respectively.

[0030] When the main body insert 1, the positioning block, the voice coil and the diaphragm are assembled into the predetermined position, the projections of the first light-transmitting structure 11 and the second light-transmitting structure in the direction of ultraviolet light irradiation at least partially overlap, so that ultraviolet light can pass through the second light-transmitting structure and the first light-transmitting structure 11 to the area between the voice coil and the diaphragm that was originally blocked by the main body insert 1 and / or the positioning block.

[0031] Preferably, the first light-transmitting structure 11 is a circular through-hole with a diameter of 1 to 3 mm. In this embodiment, the first light-transmitting structure 11 uses a circular through-hole with a diameter of 2 mm. This aperture can provide an effective propagation channel for ultraviolet light while maintaining the positioning and support functions of the main insert 1. This 2 mm diameter light-transmitting hole can meet the curing requirements of the 1210, 1511 and 1712 series of superlinear products.

[0032] The second light-transmitting structure can also be set as a circular through hole, and the effective light-transmitting area of ​​the second light-transmitting structure is larger than the effective light-transmitting area of ​​the first light-transmitting structure 11. Therefore, even if there is a certain assembly tolerance between the main body insert 1 and the positioning block, the second light-transmitting structure can still maintain an effective light-transmitting correspondence with the first light-transmitting structure 11, reducing the impact of positioning deviation on ultraviolet light propagation.

[0033] The curing process in this embodiment specifically includes the following steps.

[0034] First, place the accompanying tooling at the assembly station and install the main body insert 1 at the predetermined position of the accompanying tooling, so that the first light-transmitting structure 11 on the main body insert 1 corresponds to the second light-transmitting structure on the positioning block.

[0035] Subsequently, the diaphragm is placed within the product positioning area of ​​the accompanying tooling, and its initial positioning is achieved using positioning blocks. The voice coil is then placed in the position corresponding to the diaphragm, and the main body insert 1 and positioning blocks are used together to restrict the position of the voice coil and the diaphragm, thus forming a predetermined bonding area between them.

[0036] Before or during the assembly of the voice coil and diaphragm, UV-curable adhesive is applied to the bonding area between the voice coil and diaphragm. The UV-curable adhesive can be applied using a dispensing device and can be distributed continuously or intermittently along the connection area between the voice coil and diaphragm.

[0037] After the voice coil and diaphragm are bonded together, the main insert 1 and the positioning block maintain the relative positions of the voice coil and diaphragm and control the position of the adhesive layer between them. At this time, the first light-transmitting structure 11, the second light-transmitting structure, and the middle of the bonding area are in a corresponding state.

[0038] An ultraviolet light source is installed outside the accompanying tooling, and the ultraviolet light source is oriented towards the second light-transmitting structure. After the ultraviolet light source is turned on, the ultraviolet light enters the interior of the positioning block through the second light-transmitting structure, and further passes through the first light-transmitting structure 11 on the main body insert 1 to irradiate the glue portion in the bonding area between the voice coil and the diaphragm that is blocked by the short axis region of the main body insert 1.

[0039] At the same time, the existing ultraviolet light source of the curing equipment can be used to irradiate other directly irradiated areas of the bonding area, so that both the outer and middle areas of the bonding area can receive ultraviolet light.

[0040] Ultraviolet light irradiates the UV-cured adhesive in the middle of the bonding area through the light propagation channel, so that this part of the UV-cured adhesive reaches at least a pre-cured state. The pre-cured state means that the UV-cured adhesive has a certain shape retention ability, which can prevent the adhesive from continuing to flow, spread or deviate from the predetermined bonding position during subsequent handling, transfer or additional curing.

[0041] The intensity, irradiation time, and wavelength of ultraviolet light can be determined based on the curing characteristics of the UV-curable adhesive used, the adhesive layer thickness, and the product structure. This embodiment does not impose a unique limitation on specific UV irradiation parameters, as long as the UV-curable adhesive at the shaded area reaches a pre-cured state that restricts adhesive flow.

[0042] After pre-curing, the UV-cured adhesive between the voice coil and the diaphragm is further cured. This additional curing can be achieved through a second UV curing process, or by a combination of UV light and heat.

[0043] When using secondary UV curing, the pre-cured product can be transferred to the secondary UV curing station, where UV light is used to irradiate the bonding area between the voice coil and the diaphragm, allowing the UV-cured adhesive to reach the designed curing strength.

[0044] When using a combination of ultraviolet light and heat for curing, the adhesive can be pre-cured by ultraviolet light first, and then the product can be heated to allow the heat-curing components in the UV-cured adhesive to undergo further curing reaction, thereby improving the bonding strength and long-term reliability between the voice coil and the diaphragm.

[0045] After the curing is complete, release the main insert 1 and the positioning block from the voice coil and diaphragm, remove the super-linear product from the accompanying tooling, and inspect the bonding area. Inspection items may include the appearance of the adhesive, the location of the adhesive, the continuity of the adhesive layer, and the bonding condition between the voice coil and the diaphragm.

[0046] Through the above curing process, ultraviolet light can be irradiated through the first light-transmitting structure 11 and the second light-transmitting structure to the bonding area corresponding to the middle of the short axis of the main body insert 1, which improves the problem in the prior art that the adhesive in the middle of the bonding area is not cured or is insufficiently cured due to the obstruction of the main body insert 1 and the positioning block.

[0047] Because the adhesive in the middle of the bonding area can reach a pre-cured state in a timely manner, the flow and spreading of the adhesive in subsequent processes can be reduced, keeping the adhesive in the predetermined bonding position. This increases the effective bonding area and bonding strength between the voice coil and the diaphragm, reducing the risk of delamination or separation between the voice coil and the diaphragm. This embodiment corresponds to the technical solution of forming a light propagation channel through the first light-transmitting structure 11 and the second light-transmitting structure, and performing pre-curing on the blocked bonding area.

[0048] Example 2 The main difference between this embodiment and Embodiment 1 is that the first light-transmitting structure 11 and / or the second light-transmitting structure adopts a non-circular light-transmitting structure.

[0049] Based on the specific structure of the main insert 1, the positioning block and the product, the first light-transmitting structure 11 and the second light-transmitting structure can be set as an elliptical hole, a waist-shaped hole, a polygonal hole, an oblique hole, a stepped hole, a conical hole, a light-transmitting groove or a light-transmitting notch.

[0050] For example, when the ultraviolet light source cannot be perpendicular to the bonding area, the first light-transmitting structure 11 and the second light-transmitting structure can be set as inclined through holes so that the ultraviolet light can propagate along the inclined direction to the target bonding area between the voice coil and the diaphragm.

[0051] A light guide can also be provided within the first light-transmitting structure 11 and / or the second light-transmitting structure. The light guide can be a light guide column, optical fiber, or light-transmitting rod capable of transmitting ultraviolet light. The ultraviolet light is guided to the bonding area through the light guide to reduce the loss of ultraviolet light during propagation.

[0052] The specific shape, size, and orientation of the aforementioned light-transmitting structure can be adjusted according to the structural strength, positioning accuracy, location of the bonding area, and installation position of the ultraviolet light source of the main insert 1, as long as an effective light propagation channel can be formed from the outside of the curing fixture to the blocked bonding area.

[0053] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of this invention as claimed.

Claims

1. A curing process for a superlinear product, the superlinear product comprising a voice coil and a diaphragm, wherein a photocurable adhesive is disposed between the voice coil and the diaphragm, characterized in that: Includes the following steps: The voice coil and the diaphragm are placed in a curing fixture, and the voice coil and the diaphragm are positioned using the main body insert and the positioning block; The main body insert is provided with a first light-transmitting structure, and the positioning block is provided with a second light-transmitting structure. The first light-transmitting structure and the second light-transmitting structure correspond to each other in the direction of illumination and form a light propagation channel leading to the bonding area between the voice coil and the diaphragm. While maintaining the positioning of the voice coil and diaphragm, the curing light is transmitted through the light propagation channel to illuminate the area of ​​the bonding region that is blocked by the main body insert and / or positioning block, so that the light-cured adhesive reaches at least a pre-cured state that restricts the flow of adhesive.

2. The curing process for a superlinear product according to claim 1, characterized in that: It also includes supplementing the curing of the pre-cured light-cured adhesive to fix the voice coil to the diaphragm.

3. The curing process for a superlinear product according to claim 1, characterized in that: The first light-transmitting structure is disposed in the short axis region of the main body insert and faces the center of the bonding region.

4. The curing process for a superlinear product according to claim 1, characterized in that: Both the first and second light-transmitting structures are through holes, and the projections of the first and second light-transmitting structures in the direction of curing light at least partially overlap.

5. The curing process for a superlinear product according to claim 3, characterized in that: The first light-transmitting structure is a circular through-hole with a diameter of 1 to 3 mm.

6. The curing process for a superlinear product according to claim 5, characterized in that: The first light-transmitting structure is a circular through-hole with a diameter of 2mm.

7. The curing process for a superlinear product according to claim 1, characterized in that: The effective light-transmitting area of ​​the second light-transmitting structure is greater than that of the first light-transmitting structure.

8. The curing process for a superlinear product according to claim 1, characterized in that: The first light-transmitting structure and the second light-transmitting structure are respectively provided with one or more; When there are multiple first light-transmitting structures and multiple second light-transmitting structures, the multiple first light-transmitting structures and multiple second light-transmitting structures are arranged at intervals along the bonding area.

9. The curing process for a superlinear product according to claim 1, characterized in that: The curing light is ultraviolet light; the pre-curing step uses an ultraviolet light source set outside the accompanying tooling to guide the ultraviolet light into the bonding area through the light propagation channel.

10. The curing process for a superlinear product according to claim 2, characterized in that: Supplemental curing includes secondary UV curing and combined UV light and heat curing.

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