Cold runner rubber vulcanization mold

Abstract

The application discloses a cold runner rubber vulcanization mold, which comprises a mold assembly, a glue injection assembly and an exhaust assembly. The mold assembly comprises an upper mold plate, a glue injection plate, a lower mold plate and a lug. The glue injection plate is arranged between the upper mold plate and the lower mold plate, the upper mold plate is installed on a mold temperature machine, the lower mold plate is arranged on a lifting device, and the two sides of the glue injection plate are both provided with the lug. The exhaust assembly comprises an equal-height screw, a disc spring and a vacuum machine. The equal-height screw is connected with the lug through the glue injection plate, there is a gap between the nut of the equal-height screw and the glue injection plate, the disc spring is arranged on the outer side of the equal-height screw and between the glue injection plate and the lug, and the upper surface of the lower mold plate is provided with an exhaust groove, which is communicated with the vacuum machine. The application can make the vulcanized product free of burrs and air pockets, and subsequent trimming is not needed, so that the production efficiency and quality of the product are improved, and the waste of glue is avoided.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a cold runner rubber vulcanization mold. Background Technology

[0002] Rubber vulcanizing molds are specialized tools used for the vulcanization and molding of rubber products. They consist of an upper mold, a lower mold, etc., and the cavity determines the final shape of the product. They are mainly classified into open, closed, and combined types. The design must consider rubber shrinkage, ease of demolding, and venting issues, making them core process equipment for ensuring the dimensional accuracy and appearance quality of rubber products. In existing technologies, after vulcanization, rubber products often have flash, requiring subsequent trimming, which affects production efficiency and wastes rubber material. Summary of the Invention

[0003] According to an embodiment of the present invention, a cold runner rubber vulcanizing mold is provided, comprising: a mold assembly, a glue injection assembly, and a venting assembly; The mold assembly includes: an upper mold plate, a glue injection plate, a lower mold plate, and hanging ears; The injection plate is located between the upper mold plate and the lower mold plate. The upper mold plate is installed on the mold temperature controller, and the lower mold plate is located on the lifting device. The injection plate has hanging ears on both sides. The dispensing assembly includes: an injection mechanism and a dispensing mold; The injection mold is mounted on the injection plate, and an injection cavity is formed inside the injection mold. The injection mechanism is mounted on the upper template and is used to introduce adhesive into the injection cavity. The exhaust assembly includes: a height equalizer screw, a disc spring, and a vacuum unit; The equalizing screw passes through the glue injection plate and connects to the hanging ear. There is a gap between the nut of the equalizing screw and the glue injection plate. The disc spring is sleeved on the outside of the equalizing screw and located between the glue injection plate and the hanging ear. The upper surface of the lower template is provided with an exhaust groove, which is connected to the vacuum machine.

[0004] Furthermore, the injection mechanism includes: a dispensing nozzle and an injection nozzle; The injection nozzle is located on the upper mold plate and is connected to the mold temperature controller. The injection nozzle is located in the upper mold plate. The upper end of the injection nozzle is connected to the injection nozzle, and the lower end is connected to the injection cavity.

[0005] Furthermore, the injection mechanism also includes: a cold runner plate; The middle of the cold runner plate is connected to the injection nozzle, and a flow divider is provided on the cold runner plate to divide the adhesive into several injection nozzles.

[0006] Furthermore, the upper template includes: an upper cooling plate, a lower cooling plate, and a heat insulation plate; The lower cooling plate is located between the upper cooling plate and the heat insulation plate. The upper cooling plate is connected to the mold temperature controller. Both the upper and lower cooling plates are provided with cooling water channels. The cooling water channels in the lower cooling plate are set corresponding to the injection nozzle.

[0007] Furthermore, the dispensing assembly further includes: a dispensing pad; The injection pad is located in the lower template and is positioned corresponding to the injection mold.

[0008] Furthermore, the injection plate is provided with a plurality of heating rods, which are positioned at the upper end of the injection mold.

[0009] Furthermore, a sealing ring groove is provided on the lower surface of the glue injection plate, and an elastic sealing ring is provided in the sealing ring groove. The elastic sealing ring is used for sealing between the glue injection plate and the lower template.

[0010] Furthermore, a lifting cylinder is provided below the hook, and the output end of the lifting cylinder is connected to the hook.

[0011] Furthermore, the gap between the nut of the equal-height screw and the glue injection plate is 0.3mm~0.8mm.

[0012] According to an embodiment of the present invention, a cold runner rubber vulcanizing mold is provided. In this application, rubber material is introduced into the injection cavity of the injection mold via an injection mechanism. After 80% of the product injection is completed, a lifting device below the lower mold plate drives the lower mold plate downwards a certain distance. The spring force of the disc spring pushes the injection plate upwards, causing the surface of the injection plate to fit against the nut of the equal-height screw. At this time, a gap appears between the injection plate and the lower mold plate. Gas in the injection cavity enters the venting groove through the gap and is extracted by a vacuum machine. The lifting device then drives the lower mold plate upwards, closing the injection cavity and completing the full injection of the product. This results in a vulcanized product without burrs or trapped air, eliminating the need for subsequent trimming, improving product production efficiency and quality, and avoiding waste of rubber material.

[0013] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a cold runner rubber vulcanizing mold according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a cold runner rubber vulcanizing mold according to an embodiment of the present invention; Figure 3 This is a structural diagram of a cold runner plate for a cold runner rubber vulcanizing mold according to an embodiment of the present invention; Figure 4This is a structural diagram of the lower template of a cold runner rubber vulcanizing mold according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the lower template of a cold runner rubber vulcanizing mold according to an embodiment of the present invention.

[0015] The attached diagram is labeled as follows: 1 is the upper template, 11 is the upper cooling plate, 12 is the lower cooling plate, 13 is the heat insulation plate, 14 is the cooling water channel, 2 is the injection plate, 21 is the heating rod, 3 is the lower template, 4 is the hanging ear, 5 is the injection mechanism, 51 is the injection nozzle, 52 is the injection nozzle, 53 is the cold runner plate, 54 is the injection pad, 6 is the injection mold, 7 is the equal height screw, 8 is the disc spring, and 9 is the elastic sealing ring. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0017] First, combine Figures 1-5 A cold runner rubber vulcanizing mold according to an embodiment of the present invention is described for injection molding of small rubber products.

[0018] like Figures 1-5 As shown, an embodiment of the present invention provides a cold runner rubber vulcanizing mold, comprising: a mold assembly, a glue injection assembly, and a venting assembly; The mold assembly includes: an upper template 1, a glue injection plate 2, a lower template 3, and a hanging lug 4; The injection plate 2 is located between the upper template 1 and the lower template 3. The upper template 1 is installed on the mold temperature controller, and the lower template 3 is located on the lifting device. The injection plate 2 has hanging ears 4 on both sides. The glue injection assembly includes: an injection mechanism 5 and a glue injection mold 6; The injection mold 6 is disposed on the injection plate 2, and an injection cavity is opened in the injection mold 6. The injection mechanism 5 is disposed on the upper template 1 and is used to pass the glue into the injection cavity. The exhaust assembly includes: a height equalizing screw 7, a disc spring 8, and a vacuum unit; The equalizing screw 7 passes through the glue injection plate 2 and is connected to the hanging ear 4. There is a gap between the nut of the equalizing screw 7 and the glue injection plate 2. The disc spring 8 is sleeved on the outside of the equalizing screw 7 and located between the glue injection plate 2 and the hanging ear 4. The upper surface of the lower template 3 is provided with an exhaust groove, which is connected to the vacuum machine.

[0019] This application uses the injection mechanism 5 to introduce rubber material into the injection cavity of the injection mold 6. After 80% of the product injection is completed, the lifting device below the lower mold plate 3 drives the lower mold plate 3 to move downward a certain distance. The elastic force of the disc spring 8 pushes the injection plate 2 upward, so that the surface of the injection plate 2 is in contact with the nut of the equal-height screw 7. At this time, a gap will appear between the injection plate 2 and the lower mold plate 3. The gas in the injection cavity enters the exhaust groove through the gap. The gas is extracted by the vacuum machine. The lifting device drives the lower mold plate 3 to move upward, so that the injection cavity is closed, completing the full injection of the product. This ensures that the vulcanized product has no burrs or air pockets, eliminating the need for subsequent trimming, improving product production efficiency and quality, and avoiding waste of rubber material.

[0020] The mold temperature controller and lifting device in this embodiment are common devices in the prior art.

[0021] The injection mechanism 5 includes: a glue injection nozzle 51 and an injection nozzle 52; The injection nozzle 51 is located on the upper mold plate 1 and is connected to the mold temperature controller. The injection nozzle 52 is located in the upper mold plate 1. The upper end of the injection nozzle 52 is connected to the injection nozzle 51, and the lower end is connected to the injection cavity.

[0022] The injection mechanism 5 also includes: a cold runner plate 53; The middle of the cold runner plate 53 is connected to the injection nozzle 51. A flow divider groove is provided on the cold runner plate 53 to divide the adhesive into several injection nozzles 52.

[0023] In this embodiment, the mold temperature controller introduces the adhesive into the cold runner plate 53 through the injection nozzle 51. The adhesive is then distributed into several injection nozzles 52 by the flow channels on the cold runner plate 53. The flow channels within the cold runner plate 53 are evenly distributed, ensuring that the adhesive flows the same distance into each injection nozzle 52, thus guaranteeing that the injection speed for each product is the same. The upper template 1 includes: an upper cooling plate 11, a lower cooling plate 12, and a heat insulation plate 13; The lower cooling plate 12 is located between the upper cooling plate 11 and the heat insulation plate 13. The upper cooling plate 11 is connected to the mold temperature controller. Both the upper cooling plate 11 and the lower cooling plate 12 are provided with cooling water channels 14. The cooling water channels 14 in the lower cooling plate 12 are provided corresponding to the injection nozzle 52.

[0024] In this embodiment, after the product is injected with adhesive, the adhesive material remains in the cold runner plate 53. Cooling water channels 14 are provided in the upper cooling plate 11 and lower cooling plate 12 to cool the adhesive material in the cold runner plate 53, maintaining the temperature of the cold runner plate 53 at 80°C, thereby storing the adhesive material within the cold runner plate 53. The adhesive material in the injection nozzle 52 within the heat insulation plate 13 will age over a period of time. Before the next product injection, the aged adhesive material must be removed.

[0025] The glue injection assembly further includes: a glue injection pad 54; The glue injection pad 54 is disposed in the lower template 3, and the glue injection pad 54 is disposed corresponding to the glue injection mold 6.

[0026] In this embodiment, by setting an injection pad 54 below the injection mold 6, the adhesive material is prevented from sticking to the lower template 3, so that the product is formed in the injection mold 6.

[0027] The injection plate 2 is provided with a plurality of heating rods 21, which are positioned at the upper end of the injection mold 6.

[0028] During the injection process, the rubber material in the injection mold 6 is heated by the heating rod 21 to keep the temperature of the rubber material at 170℃~180℃, so that the rubber material can be injected and molded.

[0029] The lower surface of the glue injection plate 2 is provided with a sealing ring groove, and an elastic sealing ring 9 is provided in the sealing ring groove. The elastic sealing ring 9 is used for sealing between the glue injection plate 2 and the lower template 3.

[0030] During the venting process, the spring force of the disc spring 8 will push the injection plate 2 upward, so that the surface of the injection plate 2 is in contact with the nut of the equal height screw 7. At this time, a gap will appear between the injection plate 2 and the lower template 3. The elastic sealing ring 9 will seal the gap between the injection plate 2 and the lower template 3 from the outside to prevent external gas from entering and ensure the vacuuming of the injection cavity.

[0031] A lifting cylinder is provided below the hook 4, and the output end of the lifting cylinder is connected to the hook 4.

[0032] After the product is injected with glue, the lifting device drives the lower template 3 to move downward, so that the lower template 3 and the glue injection plate 2 are separated from the upper template 1. The lifting cylinder drives the hanging ear 4 to move upward, so that the lower template 3 is separated from the glue injection plate 2. The formed product is in the glue injection mold 6. The product is taken out from the glue injection mold 6 to complete the mold opening.

[0033] The gap between the nut of the equal-height screw 7 and the glue injection plate 2 is 0.3mm~0.8mm.

[0034] During the venting process, the lifting device drives the lower template 3 to move downward a certain distance, which cannot exceed the gap between the nut of the equal height screw 7 and the injection plate 2, to ensure that the adhesive can smoothly enter the injection mold 6.

[0035] Above, refer to Figures 1-5This invention describes a cold runner rubber vulcanizing mold according to an embodiment of the present invention. In this application, rubber material is introduced into the injection cavity of the injection mold 6 via the injection mechanism 5. After 80% of the product injection is completed, a lifting device below the lower mold plate 3 drives the lower mold plate 3 to move downwards a certain distance. The elastic force of the disc spring 8 pushes the injection plate 2 upwards, causing the surface of the injection plate 2 to fit against the nut of the equal-height screw 7. At this time, a gap appears between the injection plate 2 and the lower mold plate 3. Gas in the injection cavity enters the venting groove through the gap and is extracted by a vacuum machine. The lifting device drives the lower mold plate 3 upwards, closing the injection cavity and completing the full injection of the product. This results in a vulcanized product without burrs or trapped air, eliminating the need for subsequent trimming, improving product production efficiency and quality, and avoiding waste of rubber material.

[0036] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a 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. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A cold runner rubber vulcanizing mold, characterized in that, include: Mold components, injection components, and venting components; The mold assembly includes: an upper mold plate, a glue injection plate, a lower mold plate, and hanging ears; The injection plate is located between the upper mold plate and the lower mold plate. The upper mold plate is installed on the mold temperature controller, and the lower mold plate is located on the lifting device. The injection plate has hanging ears on both sides. The dispensing assembly includes: an injection mechanism and a dispensing mold; The injection mold is mounted on the injection plate, and an injection cavity is formed inside the injection mold. The injection mechanism is mounted on the upper template and is used to introduce adhesive into the injection cavity. The exhaust assembly includes: a height equalizer screw, a disc spring, and a vacuum unit; The equalizing screw passes through the glue injection plate and connects to the hanging ear. There is a gap between the nut of the equalizing screw and the glue injection plate. The disc spring is sleeved on the outside of the equalizing screw and located between the glue injection plate and the hanging ear. The upper surface of the lower template is provided with an exhaust groove, which is connected to the vacuum machine.

2. The cold runner rubber vulcanizing mold as described in claim 1, characterized in that, The injection mechanism includes: a glue-injecting nozzle and an injection nozzle; The injection nozzle is located on the upper mold plate and is connected to the mold temperature controller. The injection nozzle is located in the upper mold plate. The upper end of the injection nozzle is connected to the injection nozzle, and the lower end is connected to the injection cavity.

3. The cold runner rubber vulcanizing mold as described in claim 2, characterized in that, The injection mechanism also includes: a cold runner plate; The middle of the cold runner plate is connected to the injection nozzle, and a flow divider is provided on the cold runner plate to divide the adhesive into several injection nozzles.

4. The cold runner rubber vulcanizing mold as described in claim 2, characterized in that, The upper template includes: an upper cooling plate, a lower cooling plate, and a heat insulation plate; The lower cooling plate is located between the upper cooling plate and the heat insulation plate. The upper cooling plate is connected to the mold temperature controller. Both the upper and lower cooling plates are provided with cooling water channels. The cooling water channels in the lower cooling plate are set corresponding to the injection nozzle.

5. The cold runner rubber vulcanizing mold as described in claim 1, characterized in that, The dispensing assembly further includes: a dispensing pad; The glue injection pad is located in the lower template, and the glue injection pad is set in accordance with the glue injection mold.

6. The cold runner rubber vulcanizing mold as described in claim 1, characterized in that, The injection plate is equipped with several heating rods, which are positioned at the upper end of the injection mold.

7. The cold runner rubber vulcanizing mold as described in claim 1, characterized in that, A sealing ring groove is provided on the lower surface of the glue injection plate, and an elastic sealing ring is provided in the sealing ring groove. The elastic sealing ring is used for sealing between the glue injection plate and the lower template.

8. The cold runner rubber vulcanizing mold as described in claim 1, characterized in that, A lifting cylinder is provided below the hook, and the output end of the lifting cylinder is connected to the hook.

9. The cold runner rubber vulcanizing mold as described in claim 1, characterized in that, The gap between the nut of the equal-height screw and the glue injection plate is 0.3mm~0.8mm.

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