A clamping device for a plastic mold

Abstract

The application discloses a plastic mold clamping device, which belongs to the field of plastic molds. The device comprises a base and a top seat, the top of the base is provided with penetrating rods at four corners, the penetrating rods are penetratingly installed at the top seat, buffer springs are installed on the penetrating rods, plastic mold bodies are installed on the base and the top seat, a top pressing plate is installed on the adjacent side edge of the base and the top seat, fastening holes are symmetrically formed on the plastic mold bodies, and positioning assemblies are protrusively arranged on the adjacent side edges of the base and the top seat. The device has the beneficial effects that the positioning assemblies are provided, the positioning assemblies are connected with the cavities of the four ejection rods through the air pipes, the air pressure is synchronously controlled, the top pressing force of the top pressing plate on the fastening holes of the mold is uniformly distributed, local stress concentration is avoided, the positioning bolts are threadedly connected with the fixing holes to form mechanical locking, double fixing is formed with the air pressure top pressing, the clamping reliability is enhanced, and the overall structural stability is improved.

Description

Technical Field

[0001] This application relates to the field of plastic molds, and more specifically, to a clamping device for plastic molds. Background Technology

[0002] Plastic molds are a type of composite mold used in compression molding, extrusion molding, injection molding, blow molding, and low-foaming molding. The coordinated changes in the mold's punch, die, and auxiliary molding systems allow for the production of a range of plastic parts of different shapes and sizes. Plastic molds are the mother of industry; new product launches now almost always involve plastics.

[0003] Existing plastic molds often have clamping devices that lack sufficient positioning capability, which may lead to mold misalignment during compression molding, resulting in defective finished products. Furthermore, the clamping device may experience slight vibrations during clamping and compression molding, causing gaps between the clamping block and the plastic mold. Therefore, a new clamping device for plastic molds is needed to help solve this problem. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] The purpose of this application is to address the shortcomings of the prior art by providing a clamping device for plastic molds. This addresses the problems of existing plastic molds, such as the clamping device not having a high positioning capability, which may lead to mold misalignment during compression molding, resulting in defects in the finished plastic mold, and the clamping device may vibrate slightly during clamping and compression molding, causing gaps between the clamping block and the plastic mold.

[0006] To achieve the above objectives, this application provides the following technical solution: A clamping device for a plastic mold includes: a base and a top seat. A through-rod is installed at each of the four corners of the top of the base. The through-rod is installed through the top seat, and a buffer spring is sleeved on each through-rod. A plastic mold body is installed on both the base and the top seat. A limiting groove is symmetrically formed on the adjacent side of the base and the top seat. A top pressure plate for assisting in fastening the plastic mold body is installed at the limiting groove. Fastening holes are symmetrically formed on the plastic mold body. A positioning component protrudes from the adjacent side of the base and the top seat, and the fastening hole and the positioning component are fixed together.

[0007] Furthermore, the positioning assembly includes an ejector rod fixed to the base and the top seat. A pressure plate protrudes from the top of the ejector rod. A cavity is formed inside the ejector rod, and the ejector rod is slidably disposed within the cavity. A reset cavity is formed inside the base and the top seat. A sliding rod is fixed to one end of the ejector rod facing the reset cavity. The sliding rod extends into the reset cavity. A reset spring is installed inside the reset cavity to drive the sliding rod to press down. An air guide tube is formed inside the base and the top seat. The four cavities are connected through the air guide tube, and the air guide tube is connected to an air pump.

[0008] Furthermore, the top of the ejector rod is conical, and four top pressure plates are symmetrically arranged, with conical extrusion cavities inside the four top pressure plates.

[0009] Furthermore, fixing holes are drilled on both the base and the top seat, and the top pressure plate is connected and fixed to the fixing holes by positioning bolts.

[0010] Furthermore, a limiting block is provided protruding from one side of the top pressure plate toward the limiting groove, and the limiting block slides in cooperation with the limiting groove.

[0011] Furthermore, a scale plate is embedded on the side of the base and the top seat, and scale lines are engraved on the scale plate.

[0012] Furthermore, a sleeve is fitted and fixed at the bottom of the top seat corresponding to the outer edge of the through rod.

[0013] The beneficial effects of this application are as follows: by setting a positioning component, which connects the cavities of the four ejector rods through an air guide pipe, synchronous control of air pressure is achieved, so that the top pressure of the top pressure plate on the mold fastening hole is evenly distributed, avoiding local stress concentration. The conical design of the top of the ejector rod and the conical extrusion cavity of the top pressure plate cooperate to form a self-locking structure, which can maintain the top pressure even after the air pump stops supplying air, reducing energy loss. The return spring drives the ejector rod to automatically retract through the slide rod, simplifying the operation process and improving production efficiency.

[0014] The threaded connection between the positioning bolt and the fixing hole forms a mechanical lock, which, together with the pneumatic pressure, creates a double fixation, enhancing the reliability of clamping. The cooperation between the sleeve and the through rod reduces the shaking when the top seat moves, improving the overall structural stability. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0016] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the structure of the plastic mold body after disassembly. Figure 3 For this application Figure 1 Enlarged structural diagram at point A; Figure 4 This is a longitudinal sectional view of the positioning component corresponding to the base of this application.

[0018] Figure label: 1. Base; 2. Top seat; 3. Sleeve; 4. Through rod; 5. Buffer spring; 6. Plastic mold body; 7. Fastening hole; 8. Positioning component; 9. Top pressure plate; 10. Ejector rod; 101. Sealing gasket; 11. Slide rod; 12. Return spring; 13. Air guide pipe; 14. Top pressure plate; 15. Positioning bolt; 16. Fixing hole; 17. Scale plate; 18. Limit groove; 181. Limit block. Detailed Implementation

[0019] The clamping device for a plastic mold provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should also be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can also use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this application.

[0020] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0021] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0022] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figure 1-4 As shown, this utility model provides a clamping device for a plastic mold, including: a base 1 and a top seat 2. Each of the four corners of the top of the base 1 is equipped with a through rod 4, which is installed through the top seat 2. A buffer spring 5 is sleeved on the through rod 4. The elastic buffering effect of the buffer spring 5 can absorb the instantaneous impact force during the pressing process, avoid the mold from being deformed or damaged due to excessive clamping, and extend the service life of the mold. A sleeve 3 is fixedly fitted at the bottom of the top seat 2 corresponding to the outer edge of the through rod 4. A plastic mold body 6 is installed on both the base 1 and the top seat 2. A limiting groove 18 is symmetrically opened on the adjacent side of the base 1 and the top seat 2. A top pressure plate 14 for assisting in the fastening of the plastic mold body 6 is installed at the limiting groove 18. A limiting block 181 is provided on the side of the top pressure plate 14 facing the limiting groove 18. The limiting block 181 and the limiting groove 18 slide together. Fixing holes 16 are drilled on both the base 1 and the top seat 2. The top pressure plate 14 is connected and fixed to the fixing hole 16 by a positioning bolt 15.

[0024] The sliding fit between the limiting groove 18 and the limiting block 181 ensures that the top pressure plate 14 moves only along the axial direction, preventing the mold from shifting laterally during clamping and improving the fixing accuracy. The threaded connection between the positioning bolt 15 and the fixing hole 16 forms a mechanical lock, which, together with the air pressure, forms a double fixation, enhancing the clamping reliability. The fit between the sleeve 3 and the through rod 4 reduces the shaking when the top seat 2 moves, improving the overall structural stability.

[0025] A scale plate 17 is embedded on the side of the base 1 and the top seat 2. The scale plate 17 is engraved with scale lines. The scale lines provide a visual reference during adjustment, enabling operators to accurately control the top pressure stroke and adapt to molds of different sizes.

[0026] The plastic mold body 6 has symmetrical fastening holes 7. A positioning component 8 is protruding from one side of the base 1 and the top seat 2. The fastening holes 7 and the positioning component 8 are fixed together. The positioning component 8 includes an ejector rod 10 fixed on the base 1 and the top seat 2. A pressure plate 9 is protruding from the top of the ejector rod 10. A cavity is opened inside the ejector rod 10. The ejector rod 10 is slidably arranged in the cavity. The top of the ejector rod 10 is conical. Four pressure plates 9 are symmetrically arranged. The four pressure plates 9 have conical extrusion cavities inside. A reset cavity is opened inside the base 1 and the top seat 2. A slide rod 11 is fixed to one end of the ejector rod 10 facing the reset cavity. The slide rod 11 extends into the reset cavity. A reset spring 12 is installed in the reset cavity to drive the slide rod 11 to press. An air guide pipe 13 is opened inside the base 1 and the top seat 2. The four cavities are connected through the air guide pipe 13. The air guide pipe 13 is connected to an air pump.

[0027] The positioning component 8 is connected to the cavities of the four ejector rods 10 through the air guide pipe 13, so as to realize synchronous control of air pressure. This makes the top pressure of the top pressure plate 9 on the mold fastening hole 7 evenly distributed, avoiding local stress concentration. The conical design of the top of the ejector rod 10 and the conical extrusion cavity of the top pressure plate 9 cooperate to form a self-locking structure, which can maintain the top pressure after the air pump stops supplying air, reducing energy loss. The return spring 12 drives the ejector rod 10 to automatically retract through the slide rod 11, simplifying the operation process and improving production efficiency.

[0028] Working principle: The clamping device of this plastic mold, The four corners of the base 1 are provided with through rods 4 that pass through the top seat 2. The buffer springs 5 ​​sleeved on the through rods 4 provide axial buffering during the pressing process and reduce the impact force when the mold is pressed.

[0029] The limiting grooves 18 on the adjacent sides of the base 1 and the top seat 2 slide in cooperation with the limiting block 181 of the top pressure plate 14 to ensure that the top pressure plate 14 moves along the preset path and avoids lateral displacement. During installation, the fastening holes 7 on the plastic mold body 6 are connected to the positioning component 8. The ejector rod 10 in the positioning component 8 is connected to the air guide pipe 13 through the cavity. The air pump supplies air to the cavities of the four ejector rods 10 synchronously through the air guide pipe 13, pushing the top pressure plate 9 out. The conical extrusion cavity of the top pressure plate 9 cooperates with the conical top of the ejector rod 10 to tightly fit the mold fastening hole 7 with the positioning component 8, thereby completing the initial fixing of the plastic mold body 6. The return spring 12 drives the ejector rod 10 to retract through the slide rod 11 to realize the automatic reset of the pressing process, thereby completing the overall disassembly of the plastic mold body 6.

[0030] The sleeve 3 fitted at the bottom of the top seat 2 cooperates with the outer edge of the through rod 4 to enhance structural stability. The scale lines on the scale plate 17 provide a precise reference for the adjustment of the top pressure plate 14. The positioning bolt 15 fixes the top pressure plate 14 to the base 1 and the top seat 2 through the fixing hole 16 to form a double locking structure.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

[0032] It should be noted that this application covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of this application. To provide the public with a thorough understanding of this application, specific details are described in detail in the preferred embodiments, while those skilled in the art can fully understand this application without these details. Furthermore, to avoid unnecessary confusion regarding the substance of this application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0033] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A clamping device for a plastic mold, comprising: The base (1) and the top seat (2) are characterized in that: a through rod (4) is installed at each of the four corners of the top of the base (1), the through rod (4) is installed through the top seat (2), a buffer spring (5) is sleeved on the through rod (4), a plastic mold body (6) is installed on both the base (1) and the top seat (2), a limiting groove (18) is symmetrically opened on the adjacent side of the base (1) and the top seat (2), a top pressure plate (14) for fastening the plastic mold body (6) is installed at the limiting groove (18), a fastening hole (7) is symmetrically opened on the plastic mold body (6), a positioning component (8) is protruding on the adjacent side of the base (1) and the top seat (2), and the fastening hole (7) is fixed in cooperation with the positioning component (8).

2. The clamping device for plastic molds according to claim 1, characterized in that: The positioning component (8) includes an ejector rod (10) fixed on the base (1) and the top seat (2). A pressure plate (9) is provided at the top of the ejector rod (10). A cavity is provided inside the ejector rod (10). The ejector rod (10) is slidably arranged in the cavity. A reset cavity is provided inside the base (1) and the top seat (2). A slide rod (11) is fixed at one end of the ejector rod (10) facing the reset cavity. The slide rod (11) extends into the reset cavity. A reset spring (12) is installed in the reset cavity to drive the slide rod (11) to press. An air guide pipe (13) is provided inside the base (1) and the top seat (2). The four cavities are connected through the air guide pipe (13). The air guide pipe (13) is connected to an air pump.

3. The clamping device for plastic molds according to claim 2, characterized in that: The top of the ejector rod (10) is conical, and four top pressure plates (9) are symmetrically arranged, with conical extrusion cavities inside the four top pressure plates (9).

4. The clamping device for plastic molds according to claim 1, characterized in that: Fixing holes (16) are drilled on both the base (1) and the top seat (2), and the top pressure plate (14) is connected and fixed to the fixing holes (16) by positioning bolts (15).

5. The clamping device for plastic molds according to claim 4, characterized in that: The top pressure plate (14) has a limiting block (181) protruding from one side of the limiting groove (18), and the limiting block (181) slides with the limiting groove (18).

6. The clamping device for plastic molds according to claim 1, characterized in that: A scale plate (17) is embedded on the side of the base (1) and the top seat (2), and scale lines are engraved on the scale plate (17).

7. The clamping device for plastic molds according to claim 1, characterized in that: A sleeve (3) is fitted and fixed at the bottom of the top seat (2) corresponding to the outer edge of the through rod (4).

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