An annular hot-melt positioning forming jig for sound back adhesive

Abstract

The utility model belongs to sound back adhesive positioning forming jig technical field, specifically disclose a kind of annular hot melt connection positioning forming jig of sound back adhesive, including cabinet, the top of cabinet is equipped with vacuum seat, the front of vacuum seat is equipped with positioning part, the outer side wall of positioning part is formed by being equipped with multiple vacuum suction holes and is used to adhere to the adsorption surface of inner contour of back adhesive, the top of vacuum seat is equipped with heating block. The utility model utilizes the positioning part of the front of vacuum seat and the multiple vacuum suction holes on its outer side wall to form accurate adsorption surface, can be closely adhered and accurately position back adhesive;Meanwhile, utilize heating block to give the hot melt of the overlapping portion of adhesive strip two ends and connecting membrane, make adhesive strip two ends be firmly connected together through connecting membrane, form seamless and annular back adhesive, the positioning precision of whole jig is not only high, the connection strength of back adhesive produced is stable, and production efficiency is high, quality is easy to control, satisfy batch production requirement.

Description

Technical Field

[0001] This utility model belongs to the technical field of positioning and molding fixtures for audio adhesive backing, and particularly relates to a ring-shaped hot melt positioning and molding fixture for audio adhesive backing. Background Technology

[0002] In the audio equipment manufacturing industry, the precision assembly and efficient production of audio components are key factors in enhancing product competitiveness and market share. Among these, the adhesive bonding process for audio backing is a crucial step in the assembly process, directly affecting the audio's sealing performance, dust and water resistance, and overall structural stability. Particularly when processing ring-shaped adhesive strips, ensuring precise alignment and secure connection between the two ends to form a seamless ring structure has become a major technical challenge restricting audio production efficiency and product quality.

[0003] Current methods for manufacturing ring-shaped adhesive tape primarily rely on manual operation or simple mechanical bonding. Specifically, this involves cutting a long strip of adhesive to an appropriate length, aligning the two ends, and then gluing them together to form a ring-shaped adhesive tape. However, this method has several drawbacks:

[0004] (1) Low positioning accuracy: Manual operation makes it difficult to ensure the precise position of the two ends of the adhesive strip during docking, which can easily lead to misalignment or offset, resulting in the inner or outer diameter of the ring-shaped adhesive not meeting the design requirements, thus affecting the assembly accuracy of the audio components.

[0005] (2) Unstable connection strength: The bonding strength of the two ends of the adhesive strip is affected by various factors such as the skill level of the operator and the bonding environment (such as temperature and humidity). It is difficult to guarantee that the bonding strength can be consistent every time it is pasted, and it is easy to peel off or fall off, which affects the sealing and durability of the audio equipment.

[0006] (3) Low production efficiency: Manually pasting the ring-shaped adhesive is not only time-consuming and labor-intensive, but also makes it difficult to achieve large-scale and standardized production, resulting in low production efficiency, increased costs, and failure to meet the needs of modern audio manufacturing industry for efficient and automated production.

[0007] (4) High difficulty in quality control: Due to the randomness and uncontrollability of manual operation, the quality of the ring-shaped adhesive fluctuates greatly, making it difficult to carry out unified quality testing and control, which increases the product defect rate and rework rate.

[0008] Therefore, the inventors dedicated themselves to designing a positioning and forming fixture to solve the above problems. Utility Model Content

[0009] The purpose of this utility model is to provide a ring-shaped hot melt positioning and molding fixture for audio adhesive backing, which not only has high positioning accuracy and stable adhesive backing connection strength, but also has high production efficiency, is easy to control quality, and meets the requirements of mass production.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] A ring-shaped hot-melt positioning and molding fixture for audio adhesive backing includes a housing, a vacuum seat on the top of the housing, a positioning part on the front of the vacuum seat, and an adsorption surface for conforming to the inner contour of the adhesive backing by having multiple vacuum suction holes on the outer side wall of the positioning part. A heating block with lifting and hot-melt functions is provided directly above the vacuum seat to hot-melt the two ends of the adhesive strip through a connecting film to form a ring-shaped adhesive backing.

[0012] As an improvement of the annular hot-melt positioning and molding fixture for the audio backing adhesive of this utility model, the vacuum seat is provided with a vacuum chamber inside, and all the vacuum suction holes are connected to the vacuum holes of the vacuum seat through the vacuum chamber.

[0013] As an improvement of the annular hot-melt positioning and molding fixture for the audio backing adhesive of this utility model, the vacuum chamber is annular, and all the vacuum holes are arranged in a ring around the vacuum chamber at intervals.

[0014] As an improvement of the annular hot-melt positioning and molding fixture for the audio backing adhesive of this utility model, the vacuum seat includes a fixed seat and a positioning plate. The positioning part extends integrally outward from the front side of the positioning plate, and the positioning plate is sealed and covered on the front side of the fixed seat to form the vacuum cavity.

[0015] As an improvement of the annular hot-melt positioning and molding fixture for the audio backing adhesive of this utility model, the positioning part is cylindrical, and the hot-melt surface at the top of the positioning part is flat.

[0016] As an improvement to the annular hot-melt positioning and molding fixture for the speaker adhesive of this utility model, a pressure plate is detachably connected to the front of the positioning part by a positioning pin, and the width of the pressure plate is greater than the diameter of the positioning part.

[0017] As an improvement to the annular hot-melt positioning and molding fixture for the audio backing adhesive of this utility model, the front side of the positioning part is provided with a sensor for sensing the pressure plate.

[0018] As an improvement of the annular hot melt welding positioning and forming fixture for the audio backing adhesive of this utility model, a positioning block with lifting function is provided directly above the vacuum seat. The positioning block is located between the heating block and the vacuum seat. The positioning block is provided with a positioning hole for positioning the connecting film at the position opposite to the top hot melt surface of the positioning part.

[0019] As an improvement of the annular hot-melt positioning and molding fixture for the audio backing adhesive of this utility model, the positioning block is vertically guided and connected to the vacuum seat through a guide post, and the positioning block is driven to rise and fall by a positioning vertical movement cylinder fixed to the back of the vacuum seat.

[0020] As an improvement of the annular hot melt welding positioning and forming fixture for the audio backing adhesive of this utility model, a heating head is provided at the bottom of the heating block and at the position opposite to the top hot melt surface of the positioning part, a heating tube is inserted on the heating block, and a heat insulation plate is fixed on the top of the heating block.

[0021] Compared with existing technologies, the annular hot-melt positioning and molding fixture for the audio adhesive of this invention uses a vacuum seat set above the chassis. The positioning part on the front of the vacuum seat and multiple vacuum suction holes on its outer side wall form a precise adsorption surface, which can tightly fit and accurately position the inner contour of the adhesive. At the same time, a heating block with lifting and hot-melt functions is set directly above the vacuum seat. The heating block is used to heat-melt the overlapping parts of the two ends of the adhesive strip and the connecting film, so that the two ends of the adhesive strip are firmly connected together through the connecting film to form a seamless and annular adhesive. The entire fixture not only has high positioning accuracy and stable adhesive connection strength, but also has high production efficiency, is easy to control quality, and meets the requirements of mass production. Attached image description:

[0022] Figure 1 This is a perspective view of the annular hot melt positioning and molding fixture for the speaker adhesive of this utility model.

[0023] Figure 2 This is a cross-sectional view of the annular hot melt positioning and molding fixture for the speaker adhesive of this utility model.

[0024] Figure 3 This is a three-dimensional enlarged view of the vacuum seat and pressure plate of this utility model;

[0025] Figure 4 This is a three-dimensional exploded and enlarged view of the vacuum seat and pressure plate of this utility model;

[0026] Figure 5 This is another exploded and enlarged perspective view of the vacuum seat and pressure plate of this utility model;

[0027] Figure 6 This is an enlarged cross-sectional view of the vacuum holder of this utility model;

[0028] Figure 7 This is a perspective view of the fixture in the state of being fitted with adhesive strips in this utility model;

[0029] Figure 8 This is a perspective view of the fixture in the state of mounting the connecting membrane in this utility model;

[0030] Figure 9 This is an enlarged schematic diagram of the adhesive strip and the connecting film forming a backing adhesive in this utility model.

[0031] Illustration:

[0032] 1. Chassis; 11. Fixing post; 2. Vacuum base; 21. Fixing base; 211. Positioning post; 212. Vacuum hole; 22. Positioning plate; 221. Positioning part; 222. Vacuum suction hole; 223. Positioning pin; 224. Sensor; 225. Sealing ring; 226. Hot melt surface; 23. Vacuum chamber; 3. Positioning block; 31. Positioning hole; 32. Guide post; 4. Heating block; 41. Heating head; 42. Heating tube; 43. Heat insulation plate; 5. Heating vertical movement cylinder; 51. Back plate; 511. Connecting post; 6. Positioning vertical movement cylinder; 7. Pressure plate; 8. Adhesive strip; 81. Connecting membrane. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below with reference to the accompanying drawings. The drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of this utility model.

[0034] Reference Figures 1 to 9 A ring-shaped hot-melt positioning and forming fixture for audio adhesive backing includes a housing 1, a vacuum seat 2, and a heating block 4. The vacuum seat 2 is located above the housing 1. A positioning part 221 is provided on the front of the vacuum seat 2. The outer wall of the positioning part 221 is provided with a plurality of vacuum suction holes 222 to form an adsorption surface for conforming to the inner contour of the adhesive backing. The heating block 4 is located directly above the vacuum seat 2. The heating block 4 has lifting and hot-melt functions to hot-melt the two ends of the adhesive strip 8 through the connecting film 81 to form a ring-shaped adhesive backing.

[0035] Reference Figure 1 and Figure 2 The chassis 1 is equipped with two buttons for controlling the operation of various components with both hands. A heating vertical movement cylinder 5 is vertically fixed on the top of the chassis 1. A back plate 51 is fixed on the front of the heating vertical movement cylinder 5. The front of the back plate 51 is fixedly connected to the vacuum seat 2 through four connecting columns 511. The vacuum seat 2 is located in front of the back plate 51, and the back plate 51 and the vacuum seat 2 are spaced apart.

[0036] Reference Figures 1 to 6The vacuum base 2 has an annular vacuum chamber 23 inside. All vacuum suction holes 222 are arranged in a ring around the vacuum chamber 23 and are all connected to the vacuum chamber 23 so that the vacuum holes 212 can be connected to the vacuum chamber 23. The vacuum base 2 includes a fixed base 21 and a positioning plate 22. The back of the fixed base 21 is fixedly connected to the back plate 51 by four connecting posts 511. The bottom of the fixed base 21 is fixedly connected to the chassis 1 by two fixed posts 11. The lower end of the fixed base 21 has an L-shaped vacuum hole 212. One end of the vacuum hole 212 is located at the bottom of the fixed base 21 for connecting to the vacuum pump, and the other end of the vacuum hole 212 is located at the front of the fixed base 21 for connecting to the vacuum chamber 23. A positioning post 211 is vertically fixed on the front of the fixed base 21. The back of the positioning plate 22 is provided with an annular groove and a sealing ring 225. The positioning plate 22 is sealed and covered on the front of the fixed base 21 by the sealing ring 225 to form the vacuum chamber 23. The sealing ring 225 is arranged in a circle around the vacuum chamber 23. The front end of the positioning post 211 is inserted into the positioning through hole of the positioning plate 22. The positioning part 221 is integrally extended outward from the front of the positioning plate 22. The positioning part 221 is cylindrical. The circular side of the positioning part 221 is its adsorption surface. The hot melt surface 226 at the top of the positioning part 221 is flat. Two positioning pins 223 are vertically provided on the front of the positioning part 221. A sensor 224 is installed in the mounting groove on the front of the positioning part 221.

[0037] Reference Figure 3 , Figure 4 and Figure 5 To prevent the adhesive strip 8 adsorbed on the adsorption surface of the positioning part 221 from shifting, a pressure plate 7 is detachably connected to the front of the positioning part 221 by two positioning pins 223. The width of the pressure plate 7 is greater than the diameter of the positioning part 221. A sensor 224 is located between the pressure plate 7 and the positioning part 221. The sensor 224 is used to sense the pressure plate 7.

[0038] Reference Figure 1 and Figure 2 In order to position the connecting membrane 81, a positioning block 3 with lifting function is provided directly above the vacuum base 2. The positioning block 3 is located between the heating block 4 and the vacuum base 2. The positioning block 3 is provided with a positioning hole 31 for positioning the connecting membrane 81 at the position opposite to the hot melt surface 226 of the top of the positioning part 221. The side wall of the positioning hole 31 is inclined to facilitate the insertion of the connecting membrane 81. The positioning block 3 is vertically guided and connected to the vacuum base 2 through two guide pillars 32. A positioning vertical movement cylinder 6 is fixed on the back of the vacuum base 2. The output end of the positioning vertical movement cylinder 6 is connected to the positioning block 3. The positioning block 3 is driven to lift and lower by the positioning vertical movement cylinder 6.

[0039] Reference Figure 1 and Figure 2A heating head 41 is provided at the bottom of the heating block 4 opposite to the hot melt surface 226 at the top of the positioning part 221. The heating head 41 can extend into the positioning hole 31. A heating tube 42 is inserted on the heating block 4. A heat insulation plate 43 is fixed on the top of the heating block 4. The heat insulation plate 43 is set on the output shaft of the heating vertical movement cylinder 5. The heat insulation plate 43 and the heating block 4 are both located directly above the heating vertical movement cylinder 5.

[0040] Reference Figures 1 to 9 The working principle of the annular hot melt positioning and molding fixture for the speaker adhesive of this utility model is as follows:

[0041] The pressure plate 7 is installed on the front of the positioning part 221. The sensor 224 senses the pressure plate 7 and starts to draw a vacuum. A negative pressure is generated in the vacuum chamber 23, so that the multiple vacuum suction holes 222 on the adsorption surface of the positioning part 221 have a certain adsorption force.

[0042] Wrap the long strip of adhesive 8 around the adsorption surface of the positioning part 221 once to ensure that the opening of the adhesive strip 8 is located on the hot melt surface 226 at the top of the positioning part 221.

[0043] The positioning vertical movement cylinder 6 pulls the positioning block 3 down until the positioning block 3 presses on the top of the vacuum seat 2. At this time, the positioning hole 31 is just aligned with the hot melt surface 226 on the top of the positioning part 221.

[0044] Place the block-shaped connecting membrane 81 into the positioning hole 31 of the positioning block 3;

[0045] The heating vertical movement cylinder 5 drives the heating block 4 and the heat insulation plate 43 to move down together until the heating head 41 extends into the positioning hole 31, and heat melts the connecting film 81 and the two ends of the adhesive strip 8 on the heat melt surface 226, so that the overlapping part of the connecting film 81 and the opening of the adhesive strip 8 is heat melted and connected to form a ring-shaped back adhesive.

[0046] Heating block 4 and positioning block 3 are reset in sequence. Remove pressure plate 7, stop vacuuming, and then the hot-melted adhesive can be removed.

[0047] This utility model discloses a ring-shaped hot-melt positioning and forming fixture for audio adhesive backing. By setting a vacuum seat 2 above the chassis 1, the positioning part 221 on the front of the vacuum seat 2 and multiple vacuum suction holes 222 on its outer side wall form a precise adsorption surface, which can tightly fit and accurately position the inner contour of the adhesive backing. At the same time, a heating block 4 with lifting and hot-melt functions is set directly above the vacuum seat 2. The heating block 4 is used to hot-melt the overlapping parts of the two ends of the adhesive strip 8 and the connecting film 81, so that the two ends of the adhesive strip 8 are firmly connected together through the connecting film 81 to form a seamless and ring-shaped adhesive backing. The entire fixture not only has high positioning accuracy and stable adhesive backing connection strength, but also has high production efficiency, is easy to control quality, and meets the requirements of mass production.

[0048] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A ring-shaped hot-melt positioning and molding fixture for audio adhesive backing, comprising a chassis, characterized in that, The top of the chassis is provided with a vacuum seat, and the front of the vacuum seat is provided with a positioning part. The outer side wall of the positioning part is provided with a plurality of vacuum suction holes to form an adsorption surface for adhering to the inner contour of the adhesive backing. The top of the vacuum seat is provided with a heating block with lifting and hot-melting functions to heat-melt the two ends of the adhesive strip through a connecting film to form a ring-shaped adhesive backing.

2. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 1, characterized in that, The vacuum base has a vacuum chamber inside, and all the vacuum suction holes are connected to the vacuum holes of the vacuum base through the vacuum chamber.

3. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 2, characterized in that, The vacuum chamber is annular, and all the vacuum holes are arranged in a ring around the vacuum chamber at intervals.

4. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 2, characterized in that, The vacuum chamber includes a fixed base and a positioning plate. The positioning part extends integrally from the front side of the positioning plate outward. The positioning plate is sealed and covered on the front side of the fixed base to form the vacuum chamber.

5. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 1, characterized in that, The positioning part is cylindrical, and the hot-melt surface at the top of the positioning part is flat.

6. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 1, characterized in that, A pressure plate is detachably connected to the front of the positioning part via a positioning pin, and the width of the pressure plate is greater than the diameter of the positioning part.

7. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 6, characterized in that, The front of the positioning part is provided with a sensor for sensing the pressure plate.

8. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 1, characterized in that, A positioning block with lifting function is provided directly above the vacuum base. The positioning block is located between the heating block and the vacuum base. The positioning block is provided with a positioning hole for positioning the connecting membrane at a position opposite to the top hot-melt surface of the positioning part.

9. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 8, characterized in that, The positioning block is vertically guided and connected to the vacuum base via a guide post, and the positioning block is driven to rise and fall by a positioning vertical movement cylinder fixed to the back of the vacuum base.

10. The annular hot-melt positioning and forming fixture for the acoustic adhesive backing according to claim 1, characterized in that, A heating head is provided at the bottom of the heating block opposite the hot-melt surface at the top of the positioning part. A heating tube is inserted into the heating block, and a heat insulation plate is fixed to the top of the heating block.

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