Environment-friendly plastic doll mold

Abstract

The utility model belongs to the technical field of plastic mould, concretely relates to an environmental protection plastic doll mould, including upper mould and lower mould, the lower part of upper mould is provided with the lower mould that cooperates with it, injection port bushing is set up in the top center place of upper mould, heating wire is set up in the inside of injection port bushing and is close to its bottom end position, is used for the heating of molten material in injection port bushing, throttling mechanism is set up in the inside of injection port bushing, is used for the throttling of molten material in injection port bushing, the top of upper mould is provided with the positioning ring that injection port bushing top is connected, the inside of upper mould is provided with the heat -proof cover of wrapping heating wire, is used for the heat transfer of insulation heating wire to upper mould, the outer wall of injection port bushing and located heat -proof cover below is provided with the heat preservation cover. The utility model can cut off the molten material in injection port bushing after the filling of cavity, avoids the waste caused by carrying too much material when demoulding.

Description

Technical Field

[0001] This utility model belongs to the field of plastic mold technology, specifically relating to an environmentally friendly plastic doll mold. Background Technology

[0002] With the rapid development of the toy industry, plastic dolls have captured a large market share due to their diverse designs and high safety. Their production relies on the precise molding of plastic molds. Currently, in plastic doll production, the mold is the core molding equipment, and its performance directly determines the product qualification rate, production pace, and overall cost. However, existing plastic doll molds still face many technical bottlenecks in practical applications, making it difficult to meet the demands for efficient and environmentally friendly production.

[0003] Problems with existing technology: Existing molds generally lack reliable flow control mechanisms, resulting in the inability to promptly cut off the molten material between the sprue bushing and the cavity after injection molding. During demolding, the uncut sprue column easily ejects along with the product, resulting in "sprue waste." Although some molds have simple baffle structures, they are mostly fixed and cannot be flexibly adjusted according to parameters such as injection pressure and material viscosity. Either the baffle is too loose, resulting in an excessively long sprue column, or it is too tight, hindering normal injection, leading to a relatively high material loss rate, which does not meet the environmentally friendly development requirements of "reduction" in the toy industry. Utility Model Content

[0004] The purpose of this invention is to provide an environmentally friendly plastic doll mold that can cut off the molten material in the injection liner after the cavity is filled, thus avoiding waste caused by carrying too much material during demolding.

[0005] The specific technical solution adopted by this utility model is as follows: An environmentally friendly plastic doll mold includes an upper mold and a lower mold, wherein a lower mold is provided below the upper mold to cooperate with it; The injection port bushing is located at the top center of the upper mold; A heating wire is located inside the injection port bushing and near its bottom end, used to heat the molten material inside the injection port bushing. A throttling mechanism is located inside the injection port bushing and is used to throttle the molten material inside the injection port bushing.

[0006] The top of the upper mold is provided with a positioning ring that connects to the top of the injection port bushing.

[0007] The upper mold is equipped with a heat insulation sleeve that wraps around the heating wire to prevent the heat from the heating wire from being transferred to the upper mold.

[0008] An insulation sleeve is provided on the outer wall of the injection port bushing and below the insulation sleeve.

[0009] The throttling mechanism includes a flow guide block disposed inside the inlet bushing. A flow guide channel is provided through the top of the flow guide block. The flow guide channel is designed with a structure that is narrow in the middle and thick at both ends. An annular cutter is provided at the bottom of the inner part of the flow guide channel.

[0010] An installation block is provided inside the injection port bushing and below the annular cutter. An annular gap is formed between the installation block and the injection port bushing to allow the plastic solution to flow. The installation block has a cylindrical structure.

[0011] The mounting block has a top block at its top, and the bottom of the top block has an insertion groove that is slidably and sealingly connected to the top of the mounting block. The top of the top block is spherical and contacts the annular cutter.

[0012] Both the inner side of the insertion slot and the outer wall of the mounting block are provided with sealing rings.

[0013] A spring that connects to the top of the mounting block is fixed inside the insertion slot.

[0014] The technical effects achieved by this utility model are as follows: This invention utilizes a heating wire to heat the molten material inside the injection nozzle bushing, which can effectively prevent the molten material from solidifying and clogging the injection nozzle. At the same time, the heat insulation sleeve can isolate the heat from the heating wire from being transferred to the upper mold, preventing the upper mold temperature from being too high and affecting the molding of the plastic solution, and reducing heat loss and improving energy utilization. The heat insulation sleeve further ensures the fluidity of the molten material and reduces material solidification waste.

[0015] The throttling mechanism of this invention effectively increases the flow rate of molten material through a guide channel that is narrow in the middle and wide at both ends. The cooperation between the annular cutter and the top block can cut off the molten material in the sprue bushing after the cavity is filled, avoiding waste caused by carrying too much material during demolding. The spherical top of the top block cooperates with the annular cutter, which does not affect the material flow and can be adjusted by sliding when the material pressure changes, thus enhancing the flexibility of throttling. The spring can drive the top block to move upward and reset, which is convenient for the equipment to be used repeatedly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the upper mold of this utility model; Figure 3 This is a cross-sectional structural diagram of the throttling mechanism of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Upper mold; 2. Lower mold; 3. Positioning ring; 4. Inlet bushing; 5. Heating wire; 6. Heat insulation sleeve; 7. Thermal insulation sleeve; 8. Guide block; 9. Annular cutter; 10. Mounting block; 11. Top block; 12. Sealing ring. Detailed Implementation

[0018] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0019] like Figures 1-3 As shown, an environmentally friendly plastic doll mold includes an upper mold 1 and a lower mold 2, with the lower mold 2 arranged below the upper mold 1 to cooperate with it. The injection port bushing 4 is located at the top center of the upper mold 1, which facilitates the accurate entry of molten material into the mold and ensures the stability and accuracy of the feeding. Heating wire 5 is set inside the upper mold 1 to heat the molten material in the sprue bushing 4, effectively preventing the molten material from solidifying and blocking the sprue due to temperature drop in the sprue bushing 4, ensuring continuous production and improving production efficiency. A throttling mechanism is located inside the injection port bushing 4 and near its bottom end, and is used to throttle the molten material inside the injection port bushing 4.

[0020] like Figures 1-2 As shown, the top of the upper mold 1 is provided with a positioning ring 3 that connects to the top of the sprue bushing 4, ensuring the accuracy of the installation position of the sprue bushing 4, preventing the sprue bushing 4 from shifting during use, and improving the stability of the mold.

[0021] like Figure 2 As shown, the upper mold 1 is equipped with a heat insulation sleeve 6 that wraps around the heating wire 5. This is used to isolate the heat from the heating wire 5 from being transferred to the upper mold 1, so as to prevent the plastic solution from failing to form due to excessive temperature in the upper mold 1. At the same time, it reduces heat loss and improves energy utilization.

[0022] An insulation sleeve 7 is provided on the outer wall of the injection port bushing 4 and below the insulation sleeve 6 to ensure the fluidity of the molten material and reduce material solidification waste.

[0023] like Figure 3As shown, the throttling mechanism includes a guide block 8 disposed inside the injection port bushing 4. A guide channel is provided through the top of the guide block 8, which is narrow in the middle and thick at both ends. An annular cutter 9 is provided at the bottom of the guide channel. An installation block 10 is provided inside the injection port bushing 4 and below the annular cutter 9. An annular gap for the flow of plastic solution is formed between the installation block 10 and the injection port bushing 4. The installation block 10 is cylindrical. A top block 11 is provided on the top of the installation block 10. An insertion groove is provided at the bottom of the top block 11 and is slidably connected to the top of the installation block 10. The top of the top block 11 is spherical and contacts the annular cutter 9. The spherical top and the annular cutter 9 cooperate to not affect the material flow, but can be adjusted by sliding when the material pressure changes, thus enhancing the throttling flexibility. A spring connected to the top of the installation block 10 is fixed inside the insertion groove.

[0024] Based on the above structure, the flow rate of the molten material is effectively increased through the guide channel that is thin in the middle and thick at both ends; the cooperation between the annular cutter 9 and the top block 11 can cut off the molten material in the sprue bushing 4, preventing excessive molten material from being carried out during demolding and causing material waste; the spherical top of the top block 11 cooperates with the annular cutter 9, which does not affect the material flow and can be adjusted by sliding when the material pressure changes, enhancing the throttling flexibility; the spring can drive the top block 11 to move upward and reset, facilitating normal use of the equipment; during use, the material increases its flow rate through the guide block 8, impacts the top block 11 to move downward, and then the material passes through the annular gap and enters the cavity formed by the upper mold 1 and the lower mold 2 for molding. When the material fills the cavity, the elastic force of the spring drives the top block 11 to move upward and contact the annular cutter 9, which isolates the material in the sprue bushing 4, preventing excessive material from being carried out after molding and causing waste.

[0025] like Figure 3 As shown, sealing rings 12 are provided on the inner side of the insertion groove and the outer wall of the mounting block 10 to ensure the sealing of the connection between the top block 11 and the mounting block 10 and prevent leakage of molten material.

[0026] The working principle of this invention is as follows: molten plastic material enters through the injection port bushing 4, the heating wire 5 heats the material, the heat insulation sleeve 6 isolates heat transfer, and the heat preservation sleeve 7 maintains the material temperature and prevents the material from solidifying and clogging. When the material flows through the guide channel of the guide block 8, the flow velocity increases due to the structure of the channel being narrow in the middle and wide at both ends. The impact block 11 moves downward, the spring is compressed, and the material enters the cavity formed by the upper mold 1 and the lower mold 2 through the annular gap between the mounting block 10 and the injection port bushing 4. When the cavity is filled, the material pressure decreases, and the spring force drives the top block 11 to move upward. The spherical top of the top block 11 contacts the annular cutter 9, isolating the material inside the injection port bushing 4. The sealing ring 12 ensures the sealing of the connection between the top block 11 and the mounting block 10, preventing material leakage. During demolding, because the material has been cut off, excessive material is avoided, reducing waste.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An environmentally friendly plastic doll mold, characterized in that, It includes an upper mold (1) and a lower mold (2), with a lower mold (2) provided below the upper mold (1) to cooperate with it. The injection port bushing (4) is located at the top center of the upper mold (1); Heating wire (5) is installed inside the upper mold (1) to heat the molten material inside the injection nozzle bushing (4); A throttling mechanism is located inside the injection port bushing (4) and near its bottom end, for throttling the molten material inside the injection port bushing (4); the throttling mechanism includes a guide block (8) located inside the injection port bushing (4), the top of the guide block (8) having a through-flow channel, the guide channel having a structure that is thinner in the middle and thicker at both ends, and an annular cutter (9) being provided at the inner bottom of the guide channel; an installation block (10) is provided inside the injection port bushing (4) and below the annular cutter (9), the installation block (10) being connected to the injection port An annular gap for the flow of plastic solution is formed between the bushings (4). The mounting block (10) is cylindrical. The top of the mounting block (10) is provided with a top block (11). The bottom of the top block (11) is provided with a plug groove that is slidably connected to the top of the mounting block (10). The top of the top block (11) is spherical and contacts the annular cutter (9). A sealing ring (12) is provided on the inner side of the plug groove and the outer wall of the mounting block (10). A spring connected to the top of the mounting block (10) is fixed on the inner side of the plug groove.

2. The environmentally friendly plastic doll mold of claim 1, wherein: The top of the upper mold (1) is provided with a positioning ring (3) that is connected to the top of the injection bushing (4).

3. The environmentally friendly plastic doll mold of claim 1, wherein: The upper mold (1) is provided with a heat insulation sleeve (6) that wraps the heating wire (5) to prevent the heat of the heating wire (5) from being transferred to the upper mold (1).

4. The environmentally friendly plastic doll mold of claim 1, wherein: The outer wall of the injection port bushing (4) and below the heat insulation sleeve (6) is provided with a heat insulation sleeve (7).

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