Blow molding ball windless pinhole mold structure

Abstract

The utility model discloses a blow molding ball windless pinhole mould structure which comprises a first mould plate, a second mould plate, ball cavity loose cores, driving components and a wind needle component, the first mould plate and the second mould plate are symmetrically arranged, the ball cavity loose cores are symmetrically arranged on the first mould plate and the second mould plate, the driving components are arranged at the outer side ends of the first mould plate and the second mould plate, and the wind needle component is arranged on the driving components. The driving assembly is connected with the ball cavity loose core, a cavity channel is concavely formed in the mold closing surface of the first mold plate and the second mold plate, the cavity channel is used for containing a blank, the air needle assembly is arranged at the bottom of the first mold plate or the second mold plate, the air needle assembly is used for blowing air to the blank, and the blank swells and is attached to the interior of the ball cavity loose core. The symmetrical ball cavity loose cores are close to each other to cut off redundant blanks to form blow molding balls. According to the mold structure disclosed by the utility model, the blow molding ball is formed at one time without holes, secondary processing is not needed, the production cost is saved, and the production efficiency and the production quality of products are improved.

Description

Technical Field

[0001] This utility model relates to the field of blow molding ball processing technology, specifically to a blow molding ball airless pinhole mold structure. Background Technology

[0002] In the traditional blow molding process, air needs to be blown into the blank through a blower to form a sphere. However, after the blower is withdrawn, pinholes are left behind, which need to be filled manually. This process is complicated, costly, and has a low yield, resulting in low production efficiency and an unattractive product appearance.

[0003] Therefore, there is a need to provide a blow-molded ball mold structure without airflow pinholes to solve the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a blow-molded ball without pinholes mold structure, which realizes one-time molding of blow-molded balls without holes, eliminating the need for secondary processing, saving production costs, and improving product production efficiency and quality.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A blow molding ball airless pinhole mold structure includes a first template, a second template, a ball cavity core puller, a drive assembly, and an air pin assembly. The first template and the second template are symmetrically arranged, and the ball cavity core puller is symmetrically installed on the first template and the second template. The drive assembly is provided at the outer end of the first template and the second template, and the drive assembly is connected to the ball cavity core puller. The mold closing surface of the first template and the second template is recessed with a cavity for accommodating the blank. The air pin assembly is disposed at the bottom of the first template or the second template and is used to blow air into the blank, causing the blank to swell and adhere to the ball cavity core puller. When the first template and the second template are closed, the symmetrical ball cavity core pullers approach each other and cut off the excess blank to form a blow-molded ball.

[0007] As a further improvement to the above technical solution, a hemispherical cavity is provided on the inner end of the ball cavity core pulling, the blank expands and attaches to the hemispherical cavity, and a water channel is provided in the ball cavity core pulling, and the water channel is close to the hemispherical cavity.

[0008] As a further improvement to the above technical solution, a core-pulling cutter is provided at the edge of the hemispherical cavity, and the draft angle of the core-pulling cutter is greater than 10°.

[0009] As a further improvement to the above technical solution, the cavity is arranged in an arc-shaped structure.

[0010] As a further improvement to the above technical solution, the first template and the second template are each provided with multiple mounting holes in the middle, and the ball cavity core puller is inserted into the mounting holes.

[0011] As a further improvement to the above technical solution, the driving assembly includes a hydraulic cylinder, a mounting base, and a connecting plate. The outer ends of the first template and the second template are both fixedly connected to the hydraulic cylinder via the mounting base. The driving end of the hydraulic cylinder is fixedly connected to the connecting plate, and the plurality of ball cavity core pullers are fixedly connected to the connecting plate. The hydraulic cylinder is used to drive the ball cavity core pullers to move within the mounting hole.

[0012] As a further improvement to the above technical solution, the air needle assembly includes an air needle, an air needle cylinder, and a cylinder mounting base. The air needle is fixedly connected to the drive end of the air needle cylinder, and the air needle cylinder is fixedly connected to the bottom of the first template or the second template through the cylinder mounting base.

[0013] As a further improvement to the above technical solution, the bottom of the first template or the second template is provided with an exhaust port, the exhaust port is connected to the cavity, and the air needle is located below the exhaust port.

[0014] As a further improvement to the above technical solution, a plurality of positioning blocks are evenly arranged on the mold closing surface of the first template, and a plurality of positioning grooves are evenly arranged on the mold closing surface of the second template. When the first template and the second template are fully closed, the positioning blocks are engaged in the positioning grooves.

[0015] As a further improvement to the above technical solution, both the first template and the second template are provided with mounting brackets on their outer ends. The mounting brackets are used to connect the first template and the second template to other equipment.

[0016] The beneficial effects of this utility model are:

[0017] This invention features a retractable ball cavity core puller on a template and an air needle assembly at the lower end of the template. The air needle assembly inserts air needles into the blank for blow molding. The blown blank swells and adheres to the hemispherical cavity of the ball cavity core puller. When the first and second templates are closed, the symmetrical ball cavity core pullers approach each other and cut off the excess blank to form a blow-molded sphere. This achieves a one-time molding of a sphere without pinholes, improving product quality and aesthetics. Furthermore, it eliminates the need for secondary processing, effectively increasing production efficiency and saving production costs. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the blow-molded ball airless pinhole mold of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the blow-molded ball airless pinhole mold of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the first template of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the blow-molded ball airless pinhole mold of this utility model.

[0023] Reference numerals: 1. First template; 11. Positioning block; 2. Second template; 21. Positioning groove; 3. Core pulling of ball cavity; 31. Hemispherical cavity; 32. Core pulling knife edge; 4. Drive assembly; 41. Oil cylinder; 42. Mounting base; 43. Connecting plate; 5. Air needle assembly; 51. Air needle; 52. Air needle cylinder; 53. Cylinder fixing base; 6. Cavity; 7. Mounting hole; 8. Exhaust hole; 9. Mounting connecting bracket; 10. Blow-molded ball. Detailed Implementation

[0024] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0025] Reference Figure 1 , Figure 2 , Figure 4A blow molding ball airless pinhole mold structure includes a first template 1, a second template 2, a ball cavity core puller 3, a drive assembly 4, and an air pin assembly 5. The first template 1 and the second template 2 are symmetrically arranged, with one template mounted on the fixed side of the injection molding machine and the other on the moving side, facilitating template closing. The ball cavity core puller 3 is symmetrically installed at the same position on both the first template 1 and the second template 2. The drive assembly 4 is located at the outer end of both the first template 1 and the second template 2, and is connected to the ball cavity core puller 3. The ball cavity core puller 3 has an internal cavity for forming the blow-molded ball. When the first template 1 and the second template 2 close, the drive assemblies 4 on the two templates respectively drive the ball cavity core puller 5. The cores 3 approach each other to jointly shape the shape of the blow-molded sphere. The first template 1 and the second template 2 have recessed channels 6 on their mating surfaces. The channels 6 are used to accommodate the blank. The air needle assembly 5 is located at the bottom of the first template 1 or the second template 2. In use, the die head smoothly lowers the blank into the middle of the first template 1 and the second template 2. The air needles of the air needle assembly 5 are inserted into the blank to start blowing and molding. The blown blank swells and adheres to the cavity of the core-pulling 3 of the sphere cavity. When the first template 1 and the second template 2 are closed, the symmetrical core-pulling 3 of the sphere cavity approach each other to cut off the excess blank and form the blow-molded sphere 10, realizing a one-time molding of a sphere without pinholes. This improves the quality and aesthetics of the product and eliminates the need for secondary processing, effectively improving production efficiency and saving production costs.

[0026] Reference Figure 2 , Figure 4 In an embodiment of this utility model, a hemispherical cavity 31 is provided on the inner end of the ball cavity core-pulling 3 to accommodate and shape the hemispherical part of the blow-molded sphere. When the blank is blown and expanded, the blank will adhere tightly to the inner wall of the hemispherical cavity 31 to form the shape of the blow-molded sphere. In order to accelerate the cooling and shaping of the blow-molded sphere 10, a water channel 33 is provided in the ball cavity core-pulling 3, and the water channel 33 is close to the hemispherical cavity 31. Cooling water or other cooling media can be introduced into the water channel 33 to remove the heat generated by the blow-molded sphere 10 during the molding process through heat exchange, thereby accelerating its cooling and shaping process.

[0027] Specifically, a core-pulling cutter 32 is provided at the edge of the hemispherical cavity 31, which is mainly used to cut off the excess part connected to the blank after the blow-molded ball 10 is formed, thereby ensuring that the blow-molded ball 10 has clear and neat edges; and the draft angle of the core-pulling cutter 32 is greater than 10°, ensuring that the blow-molded ball 10 can be smoothly removed from the core-pulling cutter 3 of the ball cavity, and avoiding scratches or damage to the surface of the blow-molded ball 10.

[0028] Reference Figure 3 In an embodiment of this utility model, the cavity 6 is provided with an arc-shaped structure, which can avoid the presence of blank residue in the cavity 6 and facilitate cleaning.

[0029] Reference Figure 3 In the embodiments of this utility model, the first template 1 and the second template 2 are provided with a plurality of mounting holes 7 in the middle. The ball cavity core puller 3 is inserted into the mounting holes 7 to ensure that the ball cavity core puller 3 can be firmly installed on the template and maintain the correct position during the mold closing process.

[0030] Reference Figure 1 , Figure 2 In an embodiment of this utility model, the driving assembly 4 includes a hydraulic cylinder 41, a mounting base 42, and a connecting plate 43. The outer ends of the first template 1 and the second template 2 are both fixedly connected to the hydraulic cylinder 41 via the mounting base 42. The mounting base 42 ensures that the hydraulic cylinder 41 can be stably fixed on the template. The hydraulic cylinder 41 provides the necessary driving force to control the movement of the ball cavity core puller 3 within the mounting hole 7. The driving end of the hydraulic cylinder 41 is fixedly connected to the connecting plate 43, and multiple ball cavity core pullers 3 are also fixedly connected to the connecting plate 43, fixing multiple ball cavity core pullers 3 together and connecting them to the driving end of the hydraulic cylinder 41. When the hydraulic cylinder 41 works, it drives all the ball cavity core pullers 3 to move synchronously through the connecting plate 43. After blow molding is completed, the driving end of the hydraulic cylinder 41 retracts, driving the connecting plate 43 and the ball cavity core pullers 3 to exit from the template, completing the mold opening action.

[0031] Specifically, the air needle assembly 5 includes an air needle 51, an air needle cylinder 52, and a cylinder mounting base 53. The air needle 51 is responsible for blowing gas into the blank, causing the blank to expand and fit tightly against the inner wall of the ball cavity core puller 3. The air needle 51 is fixedly connected to the drive end of the air needle cylinder 52, which controls the up and down movement of the air needle 51 to ensure that the air needle 51 can be accurately inserted into the blank for blowing during the mold closing process and withdrawn in time after blow molding. The air needle cylinder 52 is fixedly connected to the bottom of the first template 1 or the second template 2 through the cylinder mounting base 53 to ensure that the air needle cylinder 52 can be stably installed at the bottom of the template and to ensure the stability of the structure during blow molding.

[0032] Reference Figure 3 In an embodiment of this utility model, the bottom of the first template 1 or the second template 2 is provided with an exhaust port 8, which is connected to the cavity 6. During the blow molding process, the gas in the cavity 6 can be discharged to the outside of the mold through the exhaust port 8, which helps to maintain the pressure balance in the cavity 6 and thus ensure the quality of the blow-molded sphere 10. The air needle 51 is located below the exhaust port 8, which ensures that the air needle 51 can be smoothly inserted and connected to the blank for blowing during blow molding.

[0033] Reference Figure 1 , Figure 3In the embodiments of this utility model, a plurality of positioning blocks 11 are uniformly arranged on the mold closing surface of the first template 1, and a plurality of positioning grooves 21 are uniformly arranged on the mold closing surface of the second template 2. When the first template 1 and the second template 2 are fully closed, the positioning blocks 11 are engaged in the positioning grooves 21 to ensure the precise alignment of the first template 1 and the second template 2 during the mold closing process, which can prevent the blank from shifting or deforming inside the mold.

[0034] Reference Figure 1 In the embodiments of this utility model, the outer ends of the first template 1 and the second template 2 are provided with mounting brackets 9. During the blow molding production process, the first template 1 and the second template 2 need to be connected with other equipment (such as injection molding machines, blow molding machines, etc.) so that the molten plastic can be injected into the mold and blow molded. The mounting brackets 9 provide the necessary connection points and fixing methods to ensure that the mold can be stably and accurately connected with other equipment.

[0035] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A blow-molded ball airless pinhole mold structure, characterized in that: The device includes a first template, a second template, a ball cavity core puller, a drive assembly, and an air needle assembly. The first template and the second template are symmetrically arranged, and the ball cavity core puller is symmetrically installed on the first template and the second template. The drive assembly is provided at the outer end of the first template and the second template, and the drive assembly is connected to the ball cavity core puller. The mold closing surface of the first template and the second template has a recessed cavity for accommodating the blank. The air needle assembly is located at the bottom of the first template or the second template and is used to blow air into the blank, causing the blank to swell and adhere to the ball cavity core puller. When the first template and the second template are closed, the symmetrical ball cavity core pullers approach each other to cut off the excess blank and form a blow-molded sphere.

2. The blow-molded ball airless pinhole mold structure according to claim 1, characterized in that: The inner end of the ball cavity core extractor is provided with a hemispherical cavity, the blank expands and adheres to the hemispherical cavity, and a water channel is provided inside the ball cavity core extractor, and the water channel is close to the hemispherical cavity.

3. The blow-molded ball airless pinhole mold structure according to claim 2, characterized in that: A core-pulling cutter is provided at the edge of the hemispherical cavity, and the draft angle of the core-pulling cutter is greater than 10°.

4. The blow-molded ball airless pinhole mold structure according to claim 1, characterized in that: The cavity is configured in an arc shape.

5. The blow-molded ball airless pinhole mold structure according to claim 1, characterized in that: Both the first template and the second template have multiple mounting holes in their middle sections, and the ball cavity core puller is inserted into the mounting holes.

6. The blow-molded ball airless pinhole mold structure according to claim 5, characterized in that: The driving assembly includes a hydraulic cylinder, a mounting base, and a connecting plate. The outer ends of the first template and the second template are both fixedly connected to the hydraulic cylinder via the mounting base. The driving end of the hydraulic cylinder is fixedly connected to the connecting plate, and the plurality of ball cavity core pullers are fixedly connected to the connecting plate. The hydraulic cylinder is used to drive the ball cavity core pullers to move within the mounting hole.

7. The blow-molded ball airless pinhole mold structure according to claim 1, characterized in that: The air needle assembly includes an air needle, an air needle cylinder, and a cylinder mounting base. The air needle is fixedly connected to the drive end of the air needle cylinder, and the air needle cylinder is fixedly connected to the bottom of the first template or the second template through the cylinder mounting base.

8. The blow-molded ball airless pinhole mold structure according to claim 7, characterized in that: The bottom of the first template or the second template is provided with an exhaust port, which is connected to the cavity, and the air needle is located below the exhaust port.

9. The blow-molded ball airless pinhole mold structure according to claim 1, characterized in that: The first template has a plurality of positioning blocks evenly arranged on its mold-closing surface, and the second template has a plurality of positioning grooves evenly arranged on its mold-closing surface. When the first template and the second template are fully closed, the positioning blocks are engaged in the positioning grooves.

10. The blow-molded ball airless pinhole mold structure according to claim 1, characterized in that: Both the first template and the second template are provided with mounting brackets on their outer ends, which are used to connect the first template and the second template to other equipment.

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