Anti-residual gate for plastic mold

Abstract

The utility model relates to the technical field of plastic mould, and disclose a kind of anti-residual sprue for plastic mould, including material guiding pipe, the bottom end of material guiding pipe is equipped with sprue body, the sprue body is divided into columnar tube located upper and conical tube located lower, the inside of columnar tube is provided with heat preservation circulating waterway, the inside of conical tube is provided with first cooling circulating waterway.This kind of anti-residual sprue for plastic mould, by first cooling circulating waterway, the cooling of sprue that conical tube opens is carried out, heat preservation circulating waterway, the heat preservation of sprue that columnar tube opens is carried out, the raw material cooling solidification in sprue that conical tube opens, raw material in sprue that columnar tube opens is in molten state, when sprue body promotes, raw material is disconnected from the sprue junction of columnar tube and conical tube, solidified raw material remains on finished product, sprue body place no longer has residual, then using tool can cut off the residual on the surface of finished product.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, specifically to an anti-residue gate for plastic molds. Background Technology

[0002] Plastic molds are a general term for combination molds 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 series of plastic parts of different shapes and sizes. They mainly include a die with a variable cavity, composed of a die assembly base plate, die components, and die assembly clamping plates; and a punch with a variable core, composed of a punch assembly base plate, punch components, punch assembly clamping plates, cavity cut-off components, and side cut-off plates. To improve the performance of plastics, various auxiliary materials, such as fillers, plasticizers, lubricants, stabilizers, and colorants, are added to the polymer to create high-performance plastics.

[0003] An existing patent (publication number: CN217395589U) discloses a gate structure for an injection mold used in automotive plastic products. The structure includes a gate body, an upper coarse sprue inside the gate body, and a lower part of the gate body containing several parallel fine sprues. The inlets of the fine sprues are connected to and communicate with the outlets of the coarse sprues. The outlets of the coarse sprues cover the inlets of all the fine sprues. The outlets of the fine sprues communicate with the cavity of the injection mold. By setting multiple fine sprues, the diameter at the connection between the gate residue and the product is relatively small, making it easier to break off. This reduces the amount of gate residue remaining on the product surface during demolding, eliminating the need for subsequent gate residue removal, reducing labor costs, and improving production efficiency.

[0004] The aforementioned patent connects the coarse sprue with several fine sprues during use. By setting multiple fine sprues, the diameter at the connection between the gate residue and the product is relatively small, making it easy to break. However, this method has certain problems. Although the plastic residue formed by the fine sprues is small and easy to break, it still requires manual cleaning after breaking. In addition, because the cooling degree of the multiple fine sprues is different, the breakage location is also different. Some gate residue will solidify on the surface of the product, and some gate residue will solidify inside the fine sprues. As a result, during the later cleaning, it is necessary not only to cut off the residue on the product surface, but also to clean the fine sprues before the injection molding operation can continue, thus affecting the efficiency of the operation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a residual gate for plastic molds, which has the advantage of easy cleaning and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a residual gate for plastic molds, comprising a guide tube, a gate body installed at the bottom end of the guide tube, the gate body being divided into an upper cylindrical tube and a lower conical tube, the cylindrical tube having an insulated circulating water channel inside, the conical tube having a first cooling circulating water channel inside, both ends of the insulated circulating water channel and the first cooling circulating water channel being fitted with flexible hoses, the gate size inside the conical tube being smaller than the gate size inside the cylindrical tube, the first cooling circulating water channel being located outside the gate of the conical tube, and the insulated circulating water channel being located outside the gate of the cylindrical tube.

[0007] Furthermore, the top and bottom of the runner in the tapered tube are provided with horn-shaped guide grooves, and the runner in the tapered tube is connected to the runner in the columnar tube through the horn-shaped guide groove at the top.

[0008] According to the above scheme, the raw material enters the runner opened in the columnar tube through the feed pipe, enters the runner opened in the conical tube through the runner opened in the columnar tube via the funnel-shaped guide groove, and flows out through the funnel-shaped guide groove below the runner opened in the conical tube, and is cooled by the first cooling circulating water channel.

[0009] Furthermore, a fixed mold is provided below the gate body, and a slot corresponding to the tapered tube is opened on the upper surface of the fixed mold. A second cooling circulation water channel is opened inside the fixed mold.

[0010] The above scheme uses a second cooling circulation channel to cool the fixed mold, which in turn cools the raw material near the gate body, ensuring that the stability of the raw material inside the fixed mold is not affected when the gate body is pulled out.

[0011] Furthermore, a rubber buffer pad is installed at the bottom end of the columnar tube.

[0012] With the above solution, during use, the gate body is pressed down by the guide pipe, and the gate body is pressed down by the rubber buffer pad, so that the gate body has a downward pressure, which reduces the impact of the backflow of the glue on the gate body when the glue is poured.

[0013] Furthermore, both ends of the heat-insulating circulating water channel are connected to external heating devices and pumps via hoses, and both ends of the first cooling circulating water channel are connected to external cooling devices and pumps via hoses.

[0014] Through the above scheme, the pump drives the cooling water into the first cooling circulation channel to cool the runner opened in the conical tube. The pump drives the heated liquid into the heat preservation circulation channel, which insulates the runner opened in the columnar tube to prevent the raw material inside the runner from cooling and solidifying due to temperature drop.

[0015] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0016] This type of anti-residue gate for plastic molds, after casting, cools the sprue through the conical tube via the first cooling circulation channel, and cools the fixed mold via the second cooling circulation channel. At the same time, the heat preservation circulation channel keeps the sprue through the columnar tube insulated, preventing the material inside the columnar tube from cooling and solidifying due to temperature drop. At this time, the material inside the conical tube sprue is cooled and solidified, while the material inside the columnar tube sprue is in a molten state. When the gate body is lifted, the material is disconnected from the connection between the columnar tube and the conical tube sprue. The solidified material remains on the finished product, and there is no residue at the gate body. Then, the residue on the surface of the finished product can be removed using tools. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present application;

[0018] Figure 2 This is a side view of the overall feed tube of this application;

[0019] Figure 3 This is a sectional view of the overall cylindrical tube front view of this application;

[0020] Figure 4 This is a sectional view of the overall tapered tube side view of this application.

[0021] In the picture:

[0022] 1. Feed pipe;

[0023] 2. Gate body; 201. Columnar tube; 202. Conical tube; 203. Insulated circulating water channel; 204. First cooling circulating water channel; 205. Flexible hose;

[0024] 3. Fixed mold; 4. Second cooling circulation channel; 5. Rubber buffer pad. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Please see Figure 1 , Figure 2 and Figure 3In this embodiment, a residual gate for a plastic mold includes a guide tube 1. A gate body 2 is installed at the bottom end of the guide tube 1. The gate body 2 is divided into a columnar tube 201 located above and a conical tube 202 located below. A heat-insulating circulating water channel 203 is provided inside the columnar tube 201, and a first cooling circulating water channel 204 is provided inside the conical tube 202. Flexible hoses 205 are installed at both ends of the heat-insulating circulating water channel 203 and the first cooling circulating water channel 204. The size of the sprue opened inside the conical tube 202 is smaller than the size of the sprue opened inside the columnar tube 201. The first cooling circulating water channel 204 is located outside the sprue opened inside the conical tube 202, and the heat-insulating circulating water channel 203 is located outside the sprue opened inside the columnar tube 201.

[0027] Please see Figure 2 , Figure 3 and Figure 4 The top and bottom of the sprue of the tapered tube 202 are provided with horn-shaped guide grooves. The sprue of the tapered tube 202 is connected to the sprue of the columnar tube 201 through the horn-shaped guide groove at the top. The raw material enters the sprue of the columnar tube 201 through the guide pipe 1, enters the sprue of the tapered tube 202 through the horn-shaped guide groove through the sprue of the columnar tube 201, and flows out through the horn-shaped guide groove below the sprue of the tapered tube 202. The sprue of the tapered tube 202 is cooled by the first cooling circulation channel 204. A fixed mold 3 is provided below the gate body 2. The upper surface of the fixed mold 3 is provided with a groove corresponding to the tapered tube 202. The fixed mold 3 is provided with a second cooling circulation channel 4 inside. The fixed mold 3 is cooled by the second cooling circulation channel 4, which helps to cool the raw material near the gate body 2 of the fixed mold 3, and ensures that the stability of the raw material inside the fixed mold 3 will not be affected when the gate body 2 is removed.

[0028] Please see Figure 2 , Figure 3 and Figure 4 A rubber buffer pad 5 is installed at the bottom of the columnar tube 201. During use, the gate body 2 is pressed down by the guide tube 1, and the gate body 2 presses down on the rubber buffer pad 5, so that the gate body 2 has a downward pressure, which reduces the impact of the backflow of the glue on the gate body 2 when the glue is poured.

[0029] Please see Figure 2 , Figure 3 and Figure 4The two ends of the insulated circulating water channel 203 are connected to the external heating device and pump through hoses 205. The two ends of the first cooling circulating water channel 204 are connected to the external cooling device and pump through hoses 205. The pump drives the cooling water into the first cooling circulating water channel 204 to cool the runner opened in the conical tube 202. The pump drives the heated liquid into the insulated circulating water channel 203. The insulated circulating water channel 203 insulates the runner opened in the columnar tube 201 to prevent the raw material inside the runner of the columnar tube 201 from cooling and solidifying due to the temperature drop.

[0030] It should be noted that the pump corresponding to the heat preservation circulation channel 203 needs to be turned on before injection molding. After the material is lifted and disconnected from the finished product by the gate body 2, the pump corresponding to the first cooling circulation channel 204 needs to be stopped.

[0031] The working principle of the above embodiment is as follows: During use, the raw material enters the sprue opened by the columnar tube 201 through the guide pipe 1, enters the sprue opened by the conical tube 202 through the sprue opened by the columnar tube 201 via the horn-shaped guide groove, and flows out to the fixed mold 3 through the horn-shaped guide groove below the sprue opened by the conical tube 202. During the injection molding process, the guide pipe 1 presses down on the gate body 2, and the gate body 2 presses down on the rubber buffer pad 5, so that the gate body 2 has a downward pressure, which reduces the impact of the backflow of the glue on the gate body 2 when the glue is poured.

[0032] After injection molding, the pump drives cooling water into the first cooling circulation channel 204 to cool the runner opened in the conical tube 202. The pump drives the heated liquid into the heat preservation circulation channel 203, which heats the runner opened in the columnar tube 201 to prevent the material inside the runner from cooling and solidifying due to temperature drop. The second cooling circulation channel 4 cools the fixed mold 3, assisting in cooling the material near the gate body 2 of the fixed mold 3, ensuring that the stability of the material inside the fixed mold 3 is not affected when the gate body 2 is pulled out. At this time, the material in the runner opened in the conical tube 202 cools and solidifies, while the material in the runner opened in the columnar tube 201 is in a molten state. When the gate body 2 is lifted, the material is disconnected from the runner connection between the columnar tube 201 and the conical tube 202. The solidified material remains on the finished product, and there is no residue at the gate body 2. Then, the residue on the surface of the finished product can be removed with tools.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gate for preventing residue buildup in plastic molds, comprising a guide tube (1), characterized in that: The bottom end of the feed pipe (1) is equipped with a gate body (2). The gate body (2) is divided into a columnar tube (201) located above and a conical tube (202) located below. The columnar tube (201) is provided with a heat-insulating circulating water channel (203). The conical tube (202) is provided with a first cooling circulating water channel (204). Both ends of the heat-insulating circulating water channel (203) and the first cooling circulating water channel (204) are equipped with hoses (205). The size of the sprue opened inside the conical tube (202) is smaller than the size of the sprue opened inside the columnar tube (201). The first cooling circulating water channel (204) is located outside the sprue opened in the conical tube (202). The heat-insulating circulating water channel (203) is located outside the sprue opened in the columnar tube (201).

2. The anti-residue gate for plastic molds according to claim 1, characterized in that: The tapered tube (202) has a horn-shaped guide groove at both the top and bottom of the runner. The runner of the tapered tube (202) is connected to the runner of the columnar tube (201) through the horn-shaped guide groove at the top.

3. The anti-residue gate for plastic molds according to claim 1, characterized in that: A fixed mold (3) is provided below the gate body (2). The upper surface of the fixed mold (3) is provided with a slot corresponding to the tapered tube (202). A second cooling circulation water channel (4) is provided inside the fixed mold (3).

4. The anti-residue gate for plastic molds according to claim 1, characterized in that: A rubber buffer pad (5) is installed at the bottom end of the columnar tube (201).

5. The anti-residue gate for plastic molds according to claim 1, characterized in that: The two ends of the heat-insulating circulating water channel (203) are connected to the external heating device and pump through hoses (205), and the two ends of the first cooling circulating water channel (204) are connected to the external cooling device and pump through hoses (205).

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