CN116572470A - Shaft sleeve production die and production process thereof - Google Patents

Abstract

The invention discloses a shaft sleeve production mold and a production process thereof, and relates to the technical field of plastic processing. The shaft sleeve production mold and its production process include a bottom plate and a top plate, a bottom mold is provided on the surface of the bottom plate facing the top plate, a top mold is provided on the surface of the top plate facing the bottom plate, and a module is fixedly connected to the bottom mold , the side surface of the top die facing the module is provided with a mold groove suitable for the module, and there is a glue injection groove in the top mold, the glue injection groove is set between the mold grooves, and the glue injection groove is close to the mold groove On one side of the inner wall, there is a sprue connected with the mold cavity. The sleeve produces the mold and its production process. After the hot melt raw material in the cavity is cooled and fixed, the gap between the sleeve and the sprue The fixed point is small, so it is easy to remove the bushing from the module, avoiding the problem of fracture when the bushing is separated due to too many connections between the bushing and the glue injection point, ensuring the quality of the bushing after processing, and also improving the quality of the bushing. Efficiency when machining bushings.

Description

A shaft sleeve production mold and its production process

technical field

The invention relates to the technical field of plastic processing, in particular to a shaft sleeve production mold and a production process thereof.

Background technique

The middle part of the shaft sleeve has a barrel with a deep depth, and the mouth of the barrel has an annular body. The existing shaft sleeves are generally processed by injection molding, and the existing injection molded parts need to use molds when manufacturing;

Most existing bushing molds for producing plastic bushings are directly connected between the gate and the cavity wall of the mold cavity, which leads to a tighter connection between the bushing and the gate after cooling, making it inconvenient to remove the bushing from the module At the same time, due to the large connection point between the bushing and the gate, the bushing is prone to breakage when it is removed, which affects the quality of the bushing after processing. At the same time, the existing bushing mold is not easy to remove the bushing, which affects Improve the production efficiency of the shaft sleeve.

Contents of the invention

The purpose of the present invention is to at least solve one of the technical problems in the prior art, to provide a shaft sleeve production mold and its production process, which can solve the problem that the shaft sleeve is easy to remove due to the large connection point between the shaft sleeve and the gate. The problem of fracture occurs, which affects the quality of the shaft sleeve after processing. At the same time, the existing shaft sleeve mold is not convenient for removing the shaft sleeve, which affects the production efficiency of the shaft sleeve.

In order to achieve the above object, the present invention provides the following technical solutions: a shaft sleeve production mold, including a bottom plate and a top plate, a bottom mold is provided on the side surface of the bottom plate facing the top plate, and a top plate is provided on the side surface of the top plate facing the bottom plate. A mold, a module is fixedly connected to the bottom mold, and a mold groove matching the module is provided on the surface of the top mold facing the module;

There is a glue injection channel in the top mold, and the glue injection channel is set between the mold grooves. On the inner wall of the glue injection channel near the mold groove, there is a point runner connected with the mold groove, and the point runner is inclined upward. Set, the size of the point where the sprue communicates with the cavity is 1mm.

Preferably, the side surface of the top plate facing away from the top mold is fixedly connected with a butt joint, the butt joint is adapted to the nozzle of the injection molding machine, the bottom wall of the butt joint is inlaid with a glue injection port, and the glue injection port is fixedly connected with a glue injection pipe , the other end of the glue injection pipe penetrates into the glue injection channel.

Preferably, the bottom mold and the top mold are inlaid with cooling pipelines, and the bottom mold and the top mold are equipped with two water pipe joints on the outside, and the other ends of the two water pipe joints respectively penetrate into the two ends of the cooling pipeline.

Preferably, the cooling pipeline is arranged in a C-shape, and the cooling pipeline is arranged on the outside of the module and the mold cavity.

Preferably, a groove is formed on the surface of the bottom plate facing the bottom mold, a push plate is arranged in the groove, a cylinder is fixedly connected to the inner wall of the groove, and one end of the telescopic rod of the cylinder is fixedly connected to the push plate.

Preferably, a push rod is fixedly connected to the surface of the push plate facing the bottom mold, the other end of the push rod slides through the bottom mold, the outer surface of the push rod is covered with a spring, and the two ends of the spring are respectively fixedly connected to the bottom mold. Between bottom mold and push plate.

Preferably, a kind of shaft sleeve production process, comprises the steps:

S1. Raw material preparation and pretreatment, after washing the raw material, put it into the drying box for drying, take out the raw material after drying, clean the production mold of any one of the shaft sleeves in the above claims 1-6, brush the release agent and pre-process heat treatment.

S2. Raw material heating, put the shaft sleeve raw material into the barrel of the injection molding machine, and use the electromagnetic induction heater to heat the plastic in the injection molding machine;

S3, heating the injection mold, heating the top mold in the injection mold to 80°C-90°C, heating the bottom mold to 82°C-95°C;

S4. Raw material injection: inject the raw materials processed by S2 into the injection port of the mold pretreated by S1 through the nozzle, and these raw materials flow along the injection port to the injection channel. When the injection channel is filled with melt , the melt flows into between the module and the cavity through the sprue, the injection pressure is 60Mpa, and the injection time is 0.18S;

S5. Holding pressure: In order to improve the strength of the shaft sleeve after production, it is necessary for the nozzle of the injection molding machine to continuously feed material to the cavity, continuously apply pressure, and compact the melt between the module and the mold cavity. The pressure during the pressure holding stage It is 80% of the maximum filling pressure, the maximum clamping force: 2T, and the holding pressure time is 30S;

S6. Mold filling and cooling. After the module and the mold cavity are filled with hot-melt raw materials, and after maintaining a certain pressure, the cooling water is connected through the water pipe joint, respectively leading to the cooling pipeline, and the cooling water flows in the cooling pipeline. In this way, the heat of the hot-melt raw material can be taken away, and finally removed from another water pipe joint, so that the hot-melt raw material between the module and the mold cavity can be cooled and solidified;

S7. Picking up the parts. After the raw materials are solidified, the mold is opened to take out the parts to obtain the original shaft sleeve.

Compared with prior art, the beneficial effect of the present invention is:

(1) The shaft sleeve production mold and its production process, inject hot-melt raw materials into the mold groove from the sprue, and when the hot-melt raw material in the mold groove is cooled and fixed, the shaft sleeve in the mold groove and the point runner The fixing points between the two parts are small, so it is easy to remove the bushing from the module, and avoid the problem of fracture when the bushing is separated due to too many connections between the bushing and the glue injection point, and ensure the quality of the bushing after processing. Improve the efficiency of bushing processing.

(2) The shaft sleeve production mold and its production process, by setting the cooling pipeline in a C shape, and the cooling pipeline is arranged on the outside of the module and the mold cavity, so that the flowing water can quickly dissipate the heat in the mold cavity Take out to ensure the efficiency of the production of the shaft sleeve. Since the cooling pipeline is located outside the module and the mold cavity, it will have a great impact on the hot-melt raw material in the glue injection channel, so that the next glue injection will not occur. There is a problem of clogging in the sprue at some point.

(3) The shaft sleeve production mold and its production process, raw material preparation and pretreatment, after washing the raw material, put it into the drying box for drying, take out the raw material after drying, clean the injection mold, brush the release agent and pretreatment Heat treatment, so as to avoid residual impurities in the injection mold from causing defects in the shaft sleeve after production, and ensure the production quality of the shaft sleeve.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is the structural representation of the first direction of the shaft sleeve production mold of the present invention;

Fig. 2 is the second direction schematic diagram of the shaft sleeve production mold of the present invention;

Fig. 3 is a schematic diagram of the first direction of the bottom mold of the present invention;

Fig. 4 is a schematic diagram of the second direction of the bottom mold of the present invention;

Fig. 5 is a top plan view of the bottom mold of the present invention.

Reference signs: 1, bottom plate; 2, bottom mold; 3, top plate; 4, top mold; 5, module; 6, glue injection channel; 7, glue injection pipe; 8, glue injection port; 9, butt joint; 10. Spring; 11. Point sprue; 12. Water pipe joint; 13. Cooling pipeline; 14. Groove; 15. Push plate; 16. Ejector.

Detailed ways

This part will describe the specific embodiment of the present invention in detail, and the preferred embodiment of the present invention is shown in the accompanying drawings. Each technical feature and overall technical solution of the invention, but it should not be understood as a limitation on the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

Please refer to Figures 1-5, the present invention provides a technical solution: a shaft sleeve production mold, including a bottom plate 1 and a top plate 3, a bottom mold 2 is provided on the surface of the bottom plate 1 facing the top plate 3, and the top plate 3 faces the bottom plate 1 There is a top mold 4 on one side of the surface, and the top plate 3 and the top mold 4 as well as the bottom plate 1 and the top plate 3 are fixed by bolts, so that the two can be dismantled in the later stage;

Further, the bottom mold 2 is fixedly connected with several modules 5, the shape of the modules 5 is the same as that of the processing bushing, the number of the modules 5 is not limited in quantity according to the actual area of the bottom mold 2, and the top mold 4 faces One side surface of the module 5 is provided with a mold groove that is compatible with the module 5, so when the bottom mold 2 and the top mold 4 are docked, the module 5 extends into the mold groove, so that the gap between the module 5 and the mold groove The hot-melt raw material is injected, and after the hot-melt raw material is cooled and solidified, the solidified hot-melt raw material is taken out from the module 5, and the produced shaft sleeve can be obtained.

Further, the top mold 4 is provided with a glue injection groove 6, and the glue injection groove 6 is arranged between the mold grooves, and the inner wall of the glue injection groove 6 close to the mold groove is provided with a point pouring hole communicating with the mold groove. At the same time, the sprue 11 is inclined upwards. The size of the point where the sprue 11 communicates with the mold cavity is 1mm. In this way, the hot-melt raw material is injected into the cavity from the sprue 11. When the hot-melt raw material in the cavity After cooling and fixing, the fixed point between the bushing in the mold cavity and the sprue 11 is relatively small, so it is easy to drop the bushing from the module 5, and avoid the bushing from being separated due to too many connections between the bushing and the injection point When there is a problem of fracture, the quality of the shaft sleeve after processing is guaranteed, and the efficiency of the shaft sleeve processing is also improved.

Further, the side surface of the top plate 3 facing away from the top mold 4 is fixedly connected with a butt joint 9, and the butt joint 9 is adapted to the nozzle of the injection molding machine, so it can be connected with the nozzle through the butt joint 9, and the bottom wall of the butt joint 9 is inlaid with The glue injection port 8 is fixedly connected with the glue injection pipe 7, and the other end of the glue injection pipe 7 penetrates into the glue injection channel 6, so that the hot melt material sprayed by the nozzle is injected through the glue injection pipe 7 to the glue injection In the through groove 6.

Further, the bottom mold 2 and the top mold 4 are all embedded with cooling pipelines 13, the cooling pipelines 13 are arranged in a C shape, and the cooling pipelines 13 are arranged on the outside of the module 5 and the mold groove, the bottom mold 2 and the top mold 4 are provided with two water pipe joints 12 on the outside, and the other ends of the two water pipe joints 12 penetrate into the two ends of the cooling pipeline 13 respectively, so that one of the two water pipe joints 12 becomes a water inlet and the other becomes a water outlet, so that through The water inlet injects cooling water into the cooling pipeline 13, the cooling water flows in the cooling pipeline 13, and is finally discharged from the water outlet. Since the cooling pipeline 13 is arranged in a C shape, and the cooling pipeline 13 is arranged on the module 5 and The outside of the mold cavity, so that the flowing water can quickly take out the heat in the mold cavity. Since the cooling pipeline 13 is arranged on the outside of the module 5 and the mold cavity, it will cause too much damage to the hot melt raw material in the glue injection channel 6. Influenced by this, there will be no problem of clogging of the sprue 11 during the next glue injection.

Further, a groove 14 is provided on the surface of the bottom plate 1 facing the bottom mold 2, and a push plate 15 is arranged in the groove 14. The inner wall of the groove 14 is fixedly connected with a cylinder, and one end of the telescopic rod of the cylinder is fixed to the push plate 15. connection, the push plate 15 is fixedly connected with a push rod 16 on the surface facing the bottom mold 2, and the other end of the push rod 16 slides through the bottom mold 2, and the outer surface of the push rod 16 is covered with a spring 10, and the two ends of the spring 10 The ends are respectively fixedly connected between the bottom mold 2 and the push plate 15, so that when the cylinder is activated, the cylinder will form a thrust force on the push plate 15, and the push plate 15 drives the ejector rod 16 to displace, so that it can be used to eject the finished product.

Working principle: connect the nozzle with the butt joint 9, the hot melt material sprayed by the nozzle is injected into the glue injection channel 6 through the glue injection pipe 7, when the glue injection channel 6 is filled with the hot melt material, the hot melt material is poured by point The channel 11 flows into the mold cavity until the gap between the mold cavity and the module 5 is full, and injects cooling water into the cooling pipeline 13 through the water inlet. The cooling water flows in the cooling pipeline 13 and is finally discharged from the water outlet. The pipeline 13 is arranged in a C-shape, and the cooling pipeline 13 is arranged on the outside of the module 5 and the mold cavity, so that the flowing water can quickly take out the heat in the mold cavity.

The present invention provides another new technical solution according to the above-mentioned solution: a shaft sleeve production process, the specific operation steps are as follows:

S1. Raw material preparation and pretreatment, wash the raw material and put it into the drying box to dry, take out the raw material after drying, clean the injection mold in the above scheme, brush the release agent and preheat treatment, so as to avoid injection mold as much as possible Residual impurities in the medium lead to defects in the shaft sleeve after production, which ensures the production quality of the shaft sleeve.

S2. Raw material heating, put the shaft sleeve raw material into the barrel of the injection molding machine, and use the electromagnetic induction heater to heat the plastic in the injection molding machine;

S3, heating the injection mold, heating the top mold 4 in the injection mold to 80°C-90°C, and heating the bottom mold 2 to 82°C-95°C;

S4. Raw material injection: inject the raw materials treated in S2 into the injection port 8 of the mold pretreated in S1 through the nozzle, and these raw materials flow along the injection port 8 to the injection channel 6. When the injection channel 6 When the inside is filled with melt, the melt flows into between the module 5 and the cavity through the sprue 11, the injection pressure is 60Mpa, and the injection time is 0.18S;

S5. Holding pressure: In order to improve the strength of the shaft sleeve after production, it is necessary for the nozzle of the injection molding machine to continuously feed the cavity and apply pressure continuously to compact the melt between the module 5 and the mold cavity. The pressure is 80% of the maximum filling pressure, the maximum clamping force: 2T, and the pressure holding time is 30S;

S6, mold filling and cooling, after the module 5 and the mold cavity are filled with hot-melt raw materials, after maintaining a certain pressure, the cooling water is connected through the water pipe joint 12, respectively leading to the cooling pipeline 13, and the cooling water is in the cooling pipeline 13, so that the heat of the hot-melt raw material can be taken away, and finally removed from another water pipe joint 12, so that the hot-melt raw material between the module 5 and the die cavity can be cooled and solidified;

S6: Pick up the parts. After the raw materials are solidified, open the mold and pick up the parts to get the original shaft sleeve.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (7)

1. The utility model provides a axle sleeve production mould which characterized in that: the mold comprises a bottom plate (1) and a top plate (3), wherein a bottom mold (2) is arranged on one side surface of the bottom plate (1) facing the top plate (3), a top mold (4) is arranged on one side surface of the top plate (3) facing the bottom plate (1), a module (5) is fixedly connected to the bottom mold (2), and a mold cavity matched with the module (5) is formed in one side surface of the top mold (4) facing the module (5);

a glue injection through groove (6) is formed in the top die (4), the glue injection through groove (6) is arranged between the die grooves, a point pouring gate (11) communicated with the die grooves is formed in the inner wall of one side, close to the die grooves, of the glue injection through groove (6), the point pouring gate (11) is arranged in an upward inclined mode, and the size of a communicating point between the point pouring gate (11) and the die grooves is 1mm.

2. A bushing manufacturing die as defined in claim 1, wherein: one side surface fixedly connected with butt joint pipe (9) of roof (3) back to top mould (4), butt joint pipe (9) and injection molding machine's nozzle adaptation, the diapire of butt joint pipe (9) is inlayed and is had injecting glue mouth (8), fixedly connected with injecting glue income pipe (7) on injecting glue mouth (8), in injecting glue income pipe (7) the other end runs through into injecting glue logical inslot (6).

3. A bushing manufacturing die as defined in claim 1, wherein: cooling pipelines (13) are embedded in the bottom die (2) and the top die (4), two water pipe joints (12) are arranged on the outer sides of the bottom die (2) and the top die (4), and the other ends of the two water pipe joints (12) penetrate through the two ends of the cooling pipelines (13) respectively.

4. A bushing production die according to claim 3, wherein: the cooling pipeline (13) is arranged in a C shape, and the cooling pipeline (13) is arranged on the outer sides of the modules (5) and the die grooves.

5. A bushing manufacturing die as defined in claim 1, wherein: a groove (14) is formed in the surface of one side of the bottom plate (1) facing the bottom die (2), a push plate (15) is arranged in the groove (14), an air cylinder is fixedly connected to the inner wall of the groove (14), and one end of an air cylinder telescopic rod is fixedly connected with the push plate (15).

6. A bushing manufacturing die as defined in claim 5, wherein: the push plate (15) is fixedly connected with a push rod (16) on the surface of one side facing the bottom die (2), the other end of the push rod (16) penetrates through the bottom die (2) in a sliding mode, a spring (10) is sleeved on the outer surface of the push rod (16), and two ends of the spring (10) are fixedly connected between the bottom die (2) and the push plate (15) respectively.

7. A process for producing a shaft sleeve, using the shaft sleeve production die as defined in any one of claims 1 to 6, characterized in that: the method comprises the following steps:

s1, preparing and preprocessing raw materials, namely washing the raw materials, putting the raw materials into a drying box for drying, taking out the raw materials after drying, and cleaning, brushing a release agent and preheating the shaft sleeve production die according to any one of claims 1-6.

S2, heating raw materials, namely placing the raw materials of the shaft sleeve into a charging barrel of an injection molding machine, and heating plastics in the injection molding machine by adopting an electromagnetic induction heater;

s3, heating the injection mold, namely heating a top mold (4) in the injection mold to 80-90 ℃ and heating a bottom mold (2) to 82-95 ℃;

s4, raw material injection: injecting the raw materials after S2 treatment into a mold glue injection port (8) after S1 pretreatment through a nozzle, wherein the raw materials flow into a glue injection through groove (6) along the glue injection port (8), when the glue injection through groove (6) is filled with melt, the melt flows into a space between a module (5) and the mold groove through a point pouring channel (11), the injection pressure is 60Mpa, and the glue injection time is as follows: 0.18S;

s5, pressure maintaining: in order to improve the strength of the sleeve after production, the nozzle of the injection molding machine is required to continuously feed the cavity, pressure is continuously applied, the melt between the module (5) and the die cavity is compacted, the pressure in the pressure maintaining stage is 80% of the maximum filling pressure, and the maximum die locking force is as follows: 2T, wherein the pressure maintaining time is 30S;

s6, filling and cooling, namely after the hot melt raw materials are filled between the module (5) and the die cavity, maintaining a certain pressure, introducing cooling water into the cooling pipeline (13) through the water pipe joint (12), and enabling the cooling water to flow in the cooling pipeline (13), so that heat of the hot melt raw materials can be taken away, and finally, the heat is discharged from the other water pipe joint (12), and the hot melt raw materials between the module (5) and the die cavity can be cooled and solidified;

s7, taking the part, and opening the die to take the part after the raw materials are solidified, so as to obtain the shaft sleeve original.