A drain basket shell forming die

Abstract

The utility model relates to the technical field of forming die, concretely to a draining basket shell forming die, including lower die holder and upper die holder, the upper die holder cover installs in the lower die holder top, the lower die holder and upper die holder are enclosed and form the cavity for draining basket shell pouring forming between, the upper die holder top is provided with the mounting hole, the pouring sleeve is detachably connected in this mounting hole, the axial passage of pouring sleeve is linked with the cavity, is used for conveying pouring liquid, the outer periphery of pouring sleeve is equipped with the heating ring, the outer periphery of pouring sleeve is equipped with the protective plate on the outside of heating ring, the protective plate is embedded and installed in the top of upper die holder, the utility model's purpose lies in solving the existing mould when pouring, and the pouring liquid is easy to lose heat and drop in temperature when flowing through the passage, and the light is unevenly filled in the cavity because of the flowability drop, and the heavy is solidified and blocks the passage, causes the problem of production interruption.

Description

Technical Field

[0001] This utility model relates to the field of molding die technology, specifically to a molding die for the outer shell of a drain basket. Background Technology

[0002] A drain basket shell molding die is a precision tool used for the mass production of drain basket shells. The die typically consists of a male mold, a female mold, and a matching guiding mechanism. Through the mold closing action, a closed cavity is formed. During the injection molding process, molten plastic is injected into the cavity through the mold's gating system to form the shell. Then, it is cooled and removed. The cooling system controls the cavity temperature within a reasonable range through a circulating water channel embedded inside the mold, accelerating plastic solidification and reducing shrinkage deformation to ensure the dimensional accuracy of the shell. In the demolding stage, the mold ejects the formed shell from the cavity through the ejection mechanism. The entire molding process must be completed on an injection molding machine. Through standardized mold design and precision manufacturing, drain basket shells can achieve efficient and stable mass production, meeting the large-scale needs of the household goods market.

[0003] In the existing mold casting process, after the casting liquid enters the preset channel from the injection end, it continuously loses heat due to heat exchange with the channel wall and the surrounding environment as it flows through the channel, causing its temperature to gradually decrease. This cooling phenomenon has a significant impact on the casting process. If the cooling is slight, the original good fluidity of the casting liquid will gradually decrease, making it difficult to achieve a uniform and sufficient filling effect in the subsequent cavity filling stage, easily leading to local inadequate filling or uneven density problems inside the cavity. If the cooling is severe, the rate of heat loss exceeds the tolerance range of the casting liquid to maintain its fluidity, and its temperature will rapidly drop to the solidification critical point, resulting in solidification inside the channel. This solidification will not only directly cause channel blockage, preventing the subsequent casting liquid from continuing to flow smoothly through the channel, but will also force the entire casting production process to stop, resulting in production interruption. Utility Model Content

[0004] The purpose of this utility model is to provide a mold for forming the outer shell of a drain basket, so as to solve the problem that when the casting liquid flows through the channel during the casting process, it is easy to lose heat and cool down. This can lead to uneven filling of the cavity due to reduced fluidity, or solidification and blockage of the channel, causing production interruption.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mold for forming the outer shell of a drain basket includes a lower mold base and an upper mold base. The upper mold base is fitted onto the top of the lower mold base, and the lower mold base and the upper mold base enclose a cavity for casting the outer shell of the drain basket. The top of the upper mold base has an installation hole, and a casting sleeve is detachably connected to the installation hole. The axial channel of the casting sleeve communicates with the cavity for conveying casting liquid. A heating ring is fitted on the outer circumferential surface of the casting sleeve, and a protective plate is fitted on the outer circumferential surface of the casting sleeve outside the heating ring. The protective plate is embedded in the top of the upper mold base, and the side edge of the protective plate extends to the outside of the side of the upper mold base.

[0007] Preferably, a fixing flange is coaxially fixed to the outer circumferential surface of the casting sleeve, and the fixing flange is fixed to the surface of the upper mold base by bolts.

[0008] Preferably, the fixed flange is located at the upper end of the protective plate.

[0009] Preferably, a sprue body is installed at the bottom end of the casting sleeve, the upper end of the sprue body is connected to the axial channel of the casting sleeve, and the lower end opening extends into the cavity.

[0010] Preferably, at least two positioning posts are evenly arranged on the top edge of the lower mold base, and positioning holes are opened on the top edge of the upper mold base corresponding to the positions of the positioning posts, and the positioning posts are adapted to the positioning holes.

[0011] Preferably, the side wall of the upper mold base is provided with an exhaust groove, one end of which is connected to the top of the cavity and the other end extends to the outside of the upper mold base.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The design uses a heating ring fitted around the outer periphery of the casting sleeve to continuously heat the casting liquid inside the sleeve, maintaining the optimal flow temperature of the casting liquid. At the same time, in conjunction with the guide design that extends from the lower end of the sprue body into the cavity, the heat-insulated casting liquid is accurately and evenly injected into the cavity through the sprue body, avoiding channel blockage and ensuring the quality of product molding.

[0014] 2. The design incorporates a protective plate that surrounds the heating coil, isolating the high-temperature heating coil from the external environment. This prevents operators from accidentally touching and burning the coil, and also prevents foreign objects from contacting it. The protective plate is securely fixed to the top of the upper mold base via a fixing flange, ensuring stable installation and completely resolving the safety protection issue of the heating coil, thereby improving production safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2This is a schematic diagram of the structure of the protective plate of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the casting sleeve of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the lower mold base of this utility model;

[0019] Figure 5 This is a schematic diagram of the upper mold base of this utility model.

[0020] In the diagram: 1. Lower mold base; 2. Upper mold base; 3. Casting sleeve; 4. Fixed flange; 5. Sprue body; 6. Protective plate; 7. Heating coil; 8. Positioning post; 9. Positioning hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 5 This utility model provides a technical solution.

[0023] A mold for forming the outer shell of a drain basket includes a lower mold base 1 and an upper mold base 2. The upper mold base 2 is fitted onto the top of the lower mold base 1, and the lower mold base 1 and the upper mold base 2 enclose a cavity for casting the outer shell of the drain basket. The top of the upper mold base 2 has an installation hole, and a casting sleeve 3 is detachably connected to the installation hole. The axial channel of the casting sleeve 3 communicates with the cavity for conveying casting liquid. A heating ring 7 is fitted on the outer circumferential surface of the casting sleeve 3. The heating ring 7 is used to heat and keep warm the casting liquid flowing in the casting sleeve 3. A protective plate 6 is fitted on the outer circumferential surface of the casting sleeve 3 outside the heating ring 7. The protective plate 6 is used to isolate the heating ring 7 for protection. The protective plate 6 is embedded in the top of the upper mold base 2. The side edge of the protective plate 6 extends to the outside of the side of the upper mold base 2. The side edge extending outward can be easily removed by external force.

[0024] The outer circumferential surface of the casting sleeve 3 is coaxially fixedly connected to a fixing flange 4, which is fixed to the surface of the upper mold base 2 by bolts, so that the casting sleeve 3 and the protective plate 6 can be detachably connected.

[0025] The fixed flange 4 is located at the upper end of the protective plate 6. It can be bolted to the top of the upper mold base 2 after passing through the fixed flange 4 and the protective plate 6 in sequence. This not only realizes the detachable fixing of the casting sleeve 3 and the upper mold base 2, but also presses and fixes the protective plate 6 to the top of the upper mold base 2, ensuring the installation stability of the protective plate 6.

[0026] The bottom end of the casting sleeve 3 is equipped with a sprue body 5. The casting sleeve 3 and the sprue body 5 are detachably connected. The upper end of the sprue body 5 is connected to the axial channel of the casting sleeve 3, and the lower end opening extends into the cavity, so that the casting liquid in the casting sleeve 3 is evenly injected into the cavity after being guided by the sprue body 5.

[0027] At least two positioning pins 8 are evenly arranged on the top edge of the lower mold base 1. Positioning holes 9 are opened on the top edge of the upper mold base 2 corresponding to the positions of the positioning pins 8. The positioning pins 8 and the positioning holes 9 are adapted to each other. When the upper mold base 2 covers the lower mold base 1, the positioning pins 8 are inserted into the positioning holes 9 to ensure the positional accuracy of the upper mold base 2 and the lower mold base 1 when they are closed, and to avoid misalignment of the cavity.

[0028] The upper mold base 2 has a venting groove on its side wall. One end of the venting groove is connected to the top of the cavity, and the other end extends to the outside of the upper mold base 2. It is used to discharge the gas generated in the cavity during the casting process and avoid bubble defects in the outer shell of the drain basket after molding.

[0029] The specific steps of this solution are as follows: Lift the upper mold base 2 (or manually move it, depending on the weight of the mold), so that the positioning holes 9 on the edge of the upper mold base 2 correspond one-to-one with the positioning pins 8 on the top of the lower mold base 1, slowly lower the upper mold base 2, and let the positioning pins 8 smoothly insert into the positioning holes 9 until the upper mold base 2 completely covers the top of the lower mold base 1. Manually check the mold closing gap to ensure that the mold closing surfaces of the lower mold base 1 and the upper mold base 2 are tightly fitted without any obvious gaps. At this time, the two enclose each other to form a complete drainage basket shell molding cavity.

[0030] Connect the power cord to the heating coil 7 (the power cord is laid out according to environmental adaptability; one implementation is, for example, it is threaded through the protective plate 6 and then connected to the outside), turn on the temperature control switch, and set the heating temperature to the heat preservation temperature of the casting liquid (such as plastic melt, metal melt, adjusted according to the material).

[0031] Slowly pour the well-stirred casting liquid into the axial channel of the casting sleeve 3. Control the pouring speed at 50-100 mL / s according to the cavity volume to avoid pouring too fast and causing the gas in the cavity to be unable to escape. During the pouring process, observe the venting groove on the side wall of the upper mold base 2 to ensure that there is continuous and stable gas discharge (if there is no gas discharge, pouring should be stopped and the venting groove should be checked for blockage). Stop pouring when the casting liquid slightly overflows from the venting groove (to confirm that the cavity is completely filled).

[0032] After pouring, keep the heating ring 7 in a warm state, and apply a holding pressure of 0.5-1MPa to the top of the pouring sleeve 3 (which can be achieved through a special holding pressure device). Set the holding pressure time to 3-5 minutes (adjust according to the material flowability) to prevent the pouring liquid in the cavity from shrinking and causing material shortage.

[0033] Turn off the power to heating coil 7 and turn on the mold cooling system (if the mold has a water cooling channel, you can pass in 20-25℃ cooling water; otherwise, let it cool naturally). Wait until the temperature drops below the material curing temperature and keep it cooling for 10-15 minutes to ensure that the outer shell of the drain basket is completely cured and formed.

[0034] For mold opening and separation, first remove the pressure holding device at the top of the casting sleeve 3, then use a wrench to loosen the auxiliary fasteners (if any) that fix the upper mold base 2, slowly lift the upper mold base 2, and let the positioning pin 8 smoothly come out of the positioning hole 9 until the upper mold base 2 and the lower mold base 1 are completely separated, exposing the molding cavity. Then, use a professional tool to gently remove the drain basket shell from the cavity of the lower mold base 1, avoiding excessive force that could deform the molded part.

[0035] After the parts are removed, use a special scraper to remove the remaining casting waste from the inner wall of the cavity, the channel of the sprue body 5 and the casting sleeve 3. Then wipe each part with a lint-free cloth dipped in cleaning agent to ensure that there is no residue. Then check whether the positioning pin 8 and positioning hole 9 are worn, whether the fixing bolts are loose, and whether the heating coil 7 is damaged. Repair or replace them in time before the next use.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold for forming the outer shell of a drain basket, comprising a lower mold base (1) and an upper mold base (2), characterized in that: The upper mold base (2) is installed on the top of the lower mold base (1). The lower mold base (1) and the upper mold base (2) enclose each other to form a cavity for casting the outer shell of the drain basket. The upper mold base (2) has an installation hole on its top. A casting sleeve (3) is detachably connected in the installation hole. The axial channel of the casting sleeve (3) is connected to the cavity for conveying the casting liquid. A heating ring (7) is fitted on the outer circumferential surface of the casting sleeve (3). A protective plate (6) is fitted on the outer circumferential surface of the casting sleeve (3) outside the heating ring (7). The protective plate (6) is inlaid on the top of the upper mold base (2). The side edge of the protective plate (6) extends to the outside of the side of the upper mold base (2).

2. The drain basket shell forming mold according to claim 1, characterized in that, The outer circumferential surface of the casting sleeve (3) is coaxially fixedly connected to a fixing flange (4), which is fixed to the surface of the upper mold base (2) by bolts.

3. The drain basket shell forming mold according to claim 2, characterized in that, The fixed flange (4) is located at the upper end of the protective plate (6).

4. The drain basket shell forming mold according to claim 1, characterized in that, The bottom end of the casting sleeve (3) is equipped with a sprue body (5), the upper end of the sprue body (5) is connected to the axial channel of the casting sleeve (3), and the lower end opening extends into the cavity.

5. The drain basket shell forming mold according to claim 1, characterized in that, At least two positioning posts (8) are evenly arranged on the top edge of the lower mold base (1), and positioning holes (9) are opened on the top edge of the upper mold base (2) corresponding to the positions of the positioning posts (8). The positioning posts (8) are adapted to the positioning holes (9).

6. The drain basket shell forming mold according to claim 1, characterized in that, The upper mold base (2) has an exhaust groove on its side wall. One end of the exhaust groove is connected to the top of the cavity, and the other end extends to the outside of the upper mold base (2).

Images