A graphite mold with replaceable core

Abstract

This utility model discloses a graphite mold with a quickly replaceable mold core. The graphite mold with a quickly replaceable mold core includes a lower support plate and an upper support plate; a lower mold core is embedded in the top of the lower support plate, and an upper mold core is embedded in the bottom of the upper support plate. Electric push rods are installed on the sides of both the lower and upper support plates. Grooves are formed on the sides of the lower and upper mold cores that are close to each other. The graphite mold with a quickly replaceable mold core provided by this utility model, through the embedded installation of the upper and lower mold cores and the use of electric push rods to fix the upper and lower mold cores, can greatly improve the mold core replacement speed, reduce the adverse effects of mold core replacement on product production, and, by using a graphite mold core, can further improve the mold's performance and expand its application range.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a graphite mold with a quick-change mold core. Background Technology

[0002] In injection molding, a mold is typically mounted on an injection molding machine. The machine injects slurry directly into the mold cavity through the gating system, where it solidifies to form the desired workpiece. Molds primarily employ a one-piece design. If any part of the mold surface is damaged during production, it will affect the quality of the produced product, necessitating mold repair. One-piece molds have high maintenance costs, and damage often requires replacement of the entire mold, significantly increasing the burden on the company. While core-type molds can reduce maintenance costs, the cores are typically secured with screws, requiring the removal of several or even a dozen screws during assembly and disassembly, resulting in slow core installation and removal speeds.

[0003] Therefore, it is necessary to provide a graphite mold with a quick-change mold core to solve the above-mentioned technical problems. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a graphite mold with a quick-change mold core, which can improve the mold core replacement speed.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A graphite mold with quick-change mold core, comprising: a lower support plate and an upper support plate; the lower mold core is embedded in the top of the lower support plate and the upper mold core is embedded in the bottom of the upper support plate; electric push rods are installed on the sides of both the lower and upper support plates; one end of the electric push rod presses against the lower / upper mold core; grooves are opened on the sides of the lower and upper mold cores that are close to each other; both the lower and upper mold cores are made of graphite material.

[0007] Preferably, both the lower support plate and the upper support plate are provided with mounting grooves, and air pumps are installed on both the lower support plate and the upper support plate.

[0008] Preferably, a compression block is fixedly installed at one end of the electric push rod.

[0009] Preferably, injection holes are provided on the upper support plate, and injection connection holes are provided on the upper mold core.

[0010] Preferably, multiple flanges are fixedly installed on the lower support plate.

[0011] Preferably, multiple guide posts are fixedly installed on the lower support plate, and the guide posts penetrate the upper support plate.

[0012] Preferably, a limiting plate is fixedly installed at the top of the guide column.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) This utility model uses an embedded upper mold core and a lower mold core, and uses an electric push rod to fix the upper mold core and the lower mold core, which can greatly improve the mold core replacement speed and reduce the adverse effects of mold core replacement on product production. In addition, the use of a graphite mold core can further improve the performance of the mold and expand the scope of mold application.

[0015] (2) By setting up an installation groove and an air pump, this utility model can further facilitate the installation and disassembly of the mold core;

[0016] (3) By fixing and installing an extrusion block at one end of the electric push rod, the contact area is increased, which effectively reduces the deformation at the contact position between the mold core and the electric push rod.

[0017] (4) By fixing and installing multiple guide columns on the lower support plate, this utility model can help improve the mold closing accuracy and thus improve product quality. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the graphite mold with quick-change mold core provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows another perspective of the structure of a graphite mold with a quick-change mold core.

[0020] Figure 3 for Figure 1 The diagram shows the structure of the lower support plate in a graphite mold with a quick-change mold core.

[0021] Figure 4 for Figure 1 The diagram shows the structure of the lower and upper mold cores in a graphite mold with quick-change mold cores.

[0022] Figure 5 for Figure 1 The diagram shows a structural schematic of one embodiment of a graphite mold with a quick-change mold core.

[0023] The corresponding names of the attached figures are: 1-lower support plate, 2-upper support plate, 3-lower mold core, 4-upper mold core, 5-air pump, 6-electric push rod, 7-groove, 8-mounting groove, 9-vent hole, 10-extrusion block, 11-injection hole, 12-injection connection hole, 13-flange, 14-guide post, 15-limiting plate. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0025] Example 1:

[0026] like Figure 1-5 As shown, this utility model provides a graphite mold with a quick-change mold core, comprising: a lower support plate 1 and an upper support plate 2; a lower mold core 3 made of graphite material is embedded in the top of the lower support plate 1, and an upper mold core 4 made of graphite material is embedded in the bottom of the upper support plate 2. The lower mold core 3 and the upper mold core 4 are the same size. Electric push rods 6 are installed on the sides of the lower support plate 1 and the upper support plate 2, and the lower mold core 3 / upper mold core 4 is pressed and fixed in the lower support plate 1 / upper support plate 2 by the electric push rods 6. Grooves 7 are formed on the sides of the lower mold core 3 and the upper mold core 4 that are close to each other. When the upper support plate 2 and the lower support plate 1 are close together, the upper mold core 4 and the lower mold core 3 are engaged, and the two grooves 7 are engaged to form a cavity. Then, injection molding is performed in the cavity to form a product. When the upper mold core 4 or the lower mold core 3 needs to be replaced, activate the electric push rod 6 to disengage its output shaft from the upper mold core 4 or the lower mold core 3, releasing the limiting position on the upper mold core 4 or the lower mold core 3. Then, remove the upper mold core 4 or the lower mold core 3 and replace it with a new mold core. Activating the electric push rod 6 again to fix the mold core completes the mold core replacement process. The entire replacement process does not require disassembling screws, thus increasing efficiency and minimizing the impact on product production efficiency. It is worth noting that the upper mold core 4 and the lower mold core 3 are made of high-purity (≥99.9%) hydrostatic graphite with a density of 1.85-1.92 g / cm³. 3 It has a thermal conductivity of 80-150 W / (m·K), can withstand high temperatures up to 3000℃ (inert environment), and has a low coefficient of thermal expansion (CTE) of 3.5×10⁻⁶. -6 / ℃ (20-2000℃ range), with self-lubricating properties and a friction coefficient of 0.08-0.15 (1 / 5 of that of steel molds), making it suitable for scenarios without release agents, thereby further improving the performance of the mold.

[0027] By using an embedded upper mold core 4 and a lower mold core 3, and fixing the upper mold core 4 and the lower mold core 3 with an electric push rod 6, the mold core replacement speed can be greatly improved, the adverse impact of mold core replacement on product production can be reduced, and the use of graphite mold cores can further improve the performance of the mold and expand the scope of mold application.

[0028] Example 2:

[0029] like Figure 3As shown, the installation methods of the upper mold core 4 and the lower mold core 3 are the same. Taking the installation method of the lower mold core 3 as an example, an installation groove 8 that matches the lower mold core 3 (upper mold core 4) is opened on the lower support plate 1 (upper support plate 2). A vent hole 9 is opened at the bottom of the installation groove 8. An air pump 5 is installed on the lower support plate 1 (upper support plate 2). The air inlet end of the air pump 5 is connected to the vent hole 9. During installation, the lower mold core 3 (upper mold core 4) is aligned with the installation groove 8 and placed in, and then the air pump is started. 5. Rotate the air pump 5 clockwise. When rotating clockwise, air is drawn from the mounting groove 8 through the vent 9. The gap between the mounting groove 8 and the lower mold core 3 (upper mold core 4) is small, creating negative pressure in the mounting groove 8. This allows the lower mold core 3 (upper mold core 4) to move towards the bottom of the groove and fit together. With manual pressing or lifting, this method effectively reduces the force required to lift the mold core during installation. After the mold core is fully fitted to the bottom of the groove, the electric push rod 6 presses and secures the mold core from the side. When disassembling the mold core, the air pump 5 can be reversed to create positive pressure in the mounting groove 8, generating a certain pushing force on the mold core, making it easier to push the mold core out of the mounting groove. This structural design makes it easier to install and disassemble the mold core.

[0030] By setting the mounting slot 8 and the air pump 5, the installation and disassembly of the mold core can be further facilitated.

[0031] Example 3:

[0032] like Figure 3 As shown, an extrusion block 10 is fixedly installed at the output end of the electric push rod 6. The extrusion block 10 is slidably connected to the lower support plate 1 (upper support plate 2). The outer shell of the electric push rod 6 is sealed to the lower support plate 1 (upper support plate 2) to prevent air leakage from the mounting groove 8 at the installation point of the electric push rod 6. In use, the electric push rod 6 is activated, causing its output shaft to extend, which in turn causes the extrusion block 10 to move and press the mold core (upper mold core 4 / lower mold core 3) in the mounting groove 8. Due to the design of the extrusion block 10, the contact surface is increased, which can reduce the deformation of the contact position between the output shaft of the electric push rod 6 and the mold core.

[0033] By fixing the extrusion block 10 to one end of the electric push rod 6, the contact area is increased, effectively reducing the deformation at the contact point between the mold core and the electric push rod.

[0034] Example 4:

[0035] like Figure 1 and Figure 4As shown, injection holes 11 are opened on the upper support plate 2, and injection connection holes 12 are opened on the upper mold core 4. The injection connection holes 12 are connected to the mold groove 7. The injection holes 11 are aligned with the injection connection holes 12 for installation. Injection is performed through the injection holes 11. High-temperature plastic enters the mold groove 7 along the injection holes 11 and injection connection holes 12 to complete the injection. It is worth noting that exhaust holes and other exhaust structures can also be designed to exhaust the gas in the mold groove 7. The position and size of the exhaust structure are designed according to actual needs and will not be elaborated here.

[0036] By providing injection hole 11 and injection connection hole 12, product injection can be facilitated.

[0037] Example 5:

[0038] like Figure 5 As shown, in this embodiment, multiple flanges 13 are fixedly installed on the lower support plate 1. The support plate 1 can be fixed on the injection molding platform through the flanges 13.

[0039] The installation of the lower support plate 1 can be facilitated by fixing multiple flanges 13 on the lower support plate 1.

[0040] Example 6:

[0041] like Figure 5 As shown, in this embodiment, multiple guide pillars 14 are fixedly installed on the lower support plate 1, and the guide pillars 14 penetrate the upper support plate 2, so that the upper and lower mold cores can close more accurately when the mold is closed. It is worth noting that a limiting plate 15 is fixedly installed at the top of the guide pillar 14. The limiting plate 15 is detachable. The limiting plate 15 can prevent the upper support plate 2 from rising too far, and the limiting plate 15 is also fixedly connected to the injection molding platform, thereby improving the stability of the guide pillar 14.

[0042] By fixing multiple guide posts 14 on the lower support plate 1, it is beneficial to improve the mold closing accuracy, thereby improving product quality.

[0043] Working principle: When the upper mold core 4 or the lower mold core 3 needs to be replaced, the electric push rod 6 is activated to disengage its output shaft from the upper mold core 4 or the lower mold core 3, thereby releasing the limit on the upper mold core 4 or the lower mold core 3. After removing the upper mold core 4 or the lower mold core 3 and replacing it with a new mold core, the electric push rod 6 is activated again to fix the mold core, thus completing the mold core replacement process. The entire replacement process does not require disassembling screws, resulting in higher efficiency and less impact on product production efficiency.

Claims

1. A graphite mold with a quick-change core, characterized by, include: Lower support plate (1) and upper support plate (2); The lower support plate (1) has a lower mold core (3) embedded in the top, and the upper support plate (2) has an upper mold core (4) embedded in the bottom. Electric push rods (6) are installed on the sides of both the lower support plate (1) and the upper support plate (2). The lower mold core (3) and the upper mold core (4) have grooves (7) on their sides that are close to each other.

2. The graphite mold with quick changeable core according to claim 1, characterized in that, Both the lower mold core (3) and the upper mold core (4) are made of graphite material.

3. The graphite mold with quick changeable core according to claim 1, characterized in that, Both the lower support plate (1) and the upper support plate (2) are provided with mounting grooves (8), and both the lower support plate (1) and the upper support plate (2) are equipped with air pumps (5).

4. The graphite mold with quick changeable core according to claim 1, characterized in that, One end of the electric push rod (6) is fixedly installed with a pressing block (10).

5. The graphite mold with quick changeable core according to claim 1, characterized in that, The upper support plate (2) has an injection hole (11), and the upper mold core (4) has an injection connection hole (12).

6. The graphite mold with quick changeable core according to claim 1, characterized in that, Multiple flanges (13) are fixedly installed on the lower support plate (1).

7. The graphite mold with quick changeable core according to claim 1, characterized in that, Multiple guide posts (14) are fixedly installed on the lower support plate (1), and the guide posts (14) penetrate the upper support plate (2).

8. The graphite mold with quick changeable core according to claim 7, characterized in that, The guide post (14) is fixedly installed with a limiting plate (15) at its top.

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