A vulcanizing mold for a rubber ring without flash

Abstract

The present invention discloses a flash-free rubber ring vulcanization mold, comprising: a runner plate, an upper template, a lower template, a first sealing ring, and a second sealing ring; wherein the runner plate is provided with a glue feed channel; the upper template is provided with a plurality of guide holes, a pair of glue feed ports, a pair of upper molding grooves, and a pair of upper glue feed grooves; the upper ends of the pair of glue feed ports are connected to the glue feed channel, and the lower ends thereof correspond to and are connected to the pair of upper glue feed grooves; the lower template is provided with a plurality of guide posts, a pair of first sealing grooves, a pair of lower molding grooves, and a pair of lower glue feed grooves; a pair of second sealing grooves are symmetrically provided on both sides of each lower glue feed groove; the first sealing ring is disposed in the first sealing groove; the second sealing ring is disposed in the second sealing groove; and the first and second sealing rings are made of PEEK material. The present invention solves the sealing problem, the product is formed without flash, and the cost of rubber raw materials and manual flash cleaning is saved; and the problem of automated production of rubber products is solved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber component forming dies, in particular to a vulcanization die for a rubber ring without flash. Background Art

[0002] During the injection molding process of rubber rings, a gap often forms between the upper and lower mold plates, resulting in a ring of flash around the rubber ring. Existing techniques often incorporate tear-off grooves in the lower mold plate, but this is not always ideal, as rubber can overflow beyond the tear-off groove, creating a significant amount of flash. Furthermore, rubber ring molds often have a single glue inlet, which can lead to high local pressure, resulting in uneven glue injection and excessive local flash. Summary of the Invention

[0003] According to an embodiment of the present invention, a flashless rubber ring vulcanization mold is provided, comprising:

[0004] A flow channel plate is provided with a glue inlet flow channel;

[0005] The upper template is provided with a plurality of guide holes, a pair of glue inlets, a pair of upper forming grooves and a pair of upper glue inlet grooves; the upper ends of the pair of glue inlets are connected to the glue inlet flow channel, and the lower ends are respectively corresponding to and connected to the pair of upper glue inlet grooves;

[0006] The lower template is provided with a plurality of guide posts, a pair of first sealing grooves, a pair of lower forming grooves and a pair of lower glue feeding grooves. The plurality of guide posts correspond to the plurality of guide holes one-to-one and can be inserted into the corresponding guide holes; the pair of first sealing grooves, the pair of lower forming grooves and the pair of lower glue feeding grooves correspond to each other one-to-one;

[0007] The first sealing groove surrounds the corresponding lower molding groove, and the lower molding groove surrounds the corresponding lower glue feeding groove.

[0008] A pair of second sealing grooves are symmetrically arranged on both sides of each lower glue inlet groove, and the second sealing grooves are arranged on the inner circle of the lower molding groove;

[0009] The upper molding groove and the lower molding groove match to form a complete molding cavity; the upper glue feeding groove and the lower glue feeding groove match to form a complete glue feeding channel;

[0010] The glue feeding channel is H-shaped, with several glue feeding holes set at both ends of the glue feeding channel, and the glue feeding holes are connected to the molding cavity;

[0011] a first sealing ring, the first sealing ring being disposed in the first sealing groove and protruding out of the first sealing groove;

[0012] A second sealing ring is disposed in the second sealing groove and protrudes out of the second sealing groove;

[0013] The first sealing ring and the second sealing ring are made of PEEK material.

[0014] Furthermore, a pair of residual material grooves are symmetrically provided at both ends of the first sealing groove, and the residual material grooves are communicated with the lower forming groove.

[0015] Furthermore, a pair of first notches are symmetrically arranged between the lower molding groove and the first sealing groove; a pair of second notches are symmetrically arranged at both ends of the first sealing ring; a pair of third notches are symmetrically arranged between the first sealing groove and the pair of residual material grooves; the first notch, the second notch, the third notch and the residual material groove correspond one to one, and the lower molding groove is connected to the residual material groove through the first notch, the second notch and the third notch.

[0016] Furthermore, an air extraction hole and a detection hole are provided on the upper template, the air extraction hole is connected to one of the residual material troughs, and the detection hole is connected to the other residual material trough.

[0017] Furthermore, a triangular material blocking block is provided at each fork at both ends of the glue feeding channel, so that the liquid glue is divided into two paths and flows through the glue feeding holes respectively.

[0018] Furthermore, chamfers are provided on both sides of the bottom of the first sealing ring, so that a gap is left between the bottom of the first sealing ring and the first sealing groove.

[0019] Furthermore, chamfers are provided on both sides of the bottom of the second sealing ring, so that a gap is left between the bottom of the second sealing ring and the second sealing groove.

[0020] Furthermore, a third sealing groove is provided on the lower template, the third sealing groove surrounds the pair of first sealing grooves, and a third sealing ring is provided in the third sealing groove.

[0021] Furthermore, a fourth sealing groove is provided on the upper template, the fourth sealing groove surrounds a pair of glue inlets, and a fourth sealing ring is provided in the fourth sealing groove.

[0022] The flash-free rubber ring vulcanization mold according to the embodiment of the present invention solves the sealing problem, and the product is molded without flash, saving the cost of rubber raw materials and manual flash cleaning; it solves the problem of automated production of rubber products; through vacuuming and the provision of a glue feeding channel, glue feeding is faster, resulting in a better product molding effect; two rubber rings can be molded at a time, thereby improving work efficiency.

[0023] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded view of a vulcanization mold for a flashless rubber ring according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1A magnified view of point A;

[0026] Figure 3 Schematic diagram of the front view of a vulcanization mold for a flashless rubber ring according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of a top view of a vulcanization mold for a flashless rubber ring according to an embodiment of the present invention;

[0028] Figure 5 for Figure 4 AA sectional view;

[0029] Figure 6 for Figure 5 Enlarged view of point B;

[0030] Figure 7 for Figure 4 BB cross-sectional view;

[0031] Figure 8 for Figure 7 Enlarged view of point C;

[0032] Figure 9 Schematic diagram of the structure of the lower template according to an embodiment of the present invention;

[0033] Figure 10 for Figure 9 Enlarged view of point D;

[0034] Figure 11 A partially enlarged view of a glue feeding channel according to an embodiment of the present invention;

[0035] Figure 12 Schematic diagram of the structure of the first sealing ring and the second sealing ring according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0037] First, combine Figures 1 to 12 A flashless rubber ring vulcanization mold according to an embodiment of the present invention is described, which is used for the production of rubber parts and has a wide range of application scenarios.

[0038] like Figures 1 to 12 As shown, the flashless rubber ring vulcanization mold of the embodiment of the present invention comprises:

[0039] The flow channel plate 1 is provided with a glue inlet flow channel 11;

[0040] The upper template 2 is provided with a plurality of guide holes 21, a pair of glue inlets 22, a pair of upper molding grooves 23 and a pair of upper glue inlet grooves 24; the upper ends of the pair of glue inlets 22 are connected to the glue inlet flow channel 11, and the lower ends are respectively in one-to-one correspondence and connected to the pair of upper glue inlet grooves 24;

[0041] The lower template 3 is provided with a plurality of guide posts 31, a pair of first sealing grooves 32, a pair of lower molding grooves 33, and a pair of lower glue feed grooves 34. The plurality of guide posts 31 correspond one-to-one with the plurality of guide holes 21 and can be inserted into the corresponding guide holes 21. The guide posts 31 play a guiding role when the mold is closed; the pair of first sealing grooves 32, the pair of lower molding grooves 33, and the pair of lower glue feed grooves 34 correspond one-to-one;

[0042] The first sealing groove 32 surrounds the corresponding lower molding groove 33, and the lower molding groove 33 surrounds the corresponding lower glue feeding groove 34.

[0043] A pair of second sealing grooves 35 are symmetrically provided on both sides of each lower glue inlet groove 34 , and the second sealing grooves 35 are provided on the inner circle of the lower molding groove 33 ;

[0044] The upper molding groove 23 and the lower molding groove 33 match to form a complete molding cavity a; the upper glue feeding groove 24 and the lower glue feeding groove 34 match to form a complete glue feeding channel b;

[0045] The glue feeding channel b is H-shaped, and a plurality of glue feeding holes b1 are provided at both ends of the glue feeding channel b. The glue feeding holes b1 are connected to the molding cavity a, so that the glue material enters the molding cavity a evenly from the glue feeding holes b1 at both ends of the glue feeding channel b during the glue injection process.

[0046] The first sealing ring 4 is arranged in the first sealing groove 32 and protrudes from the first sealing groove 32. When the mold is closed, the upper mold plate 2 contacts and squeezes the first sealing ring 4 to achieve a better sealing effect;

[0047] The second sealing ring 5 is arranged in the second sealing groove 35 and protrudes from the second sealing groove 35. When the mold is closed, the upper mold plate 2 contacts and squeezes the second sealing ring 5 to achieve a better sealing effect;

[0048] The first sealing ring 4 and the second sealing ring 5 are made of PEEK material. PEEK material is corrosion-resistant and aging-resistant, has strong flexibility and rigidity, and has strong wear resistance. Therefore, the first sealing ring 4 and the second sealing ring 5 are made of PEEK material, which greatly improves the sealing between the lower template 3 and the upper template 2, and prevents the generation of flash during the rubber ring molding process due to the gap between the upper template 2 and the lower template 3.

[0049] Further, if Figure 2 、 12As shown, in this embodiment, a pair of residual material grooves 36 are symmetrically provided at both ends of the first sealing groove 32. The residual material grooves 36 are connected to the lower molding groove 33. The residual material grooves 36 are used to hold excess liquid material during injection molding and gas generated during the molding process.

[0050] Further, if Figure 2 、 12 As shown, in this embodiment, a pair of first notches 37 are symmetrically arranged between the lower molding groove 33 and the first sealing groove 32; a pair of second notches 38 are symmetrically arranged at both ends of the first sealing ring 4; a pair of third notches 39 are symmetrically arranged between the first sealing groove 32 and the pair of residual material grooves 36; the first notch 37, the second notch 38, the third notch 39 and the residual material grooves 36 correspond one to one, and the lower molding groove 33 is connected with the residual material groove 36 through the first notch 37, the second notch 38, and the third notch 39, so that the residual material can better enter the residual material groove 36.

[0051] Further, if Figure 7 As shown, in this embodiment, the upper mold plate 2 is provided with an exhaust hole 25 and a detection hole 26. The exhaust hole 25 is connected to one of the residual material grooves 36. After the mold is closed, the vacuum generator evacuates the molding cavity a through the exhaust hole 25 to facilitate the material to enter the molding cavity a. The exhaust hole 25 is directly connected to the residual material groove 36, which not only simplifies the structure, but also better maintains the sealing of the molding cavity a, further preventing the generation of flash. The detection hole 26 is connected to the other residual material groove 36. A negative pressure gauge is installed in the detection hole 26 for detecting the pressure in the mold.

[0052] Further, if Figures 10-11 As shown, in this embodiment, a triangular blocking block b2 is provided at each fork at both ends of the glue feeding channel b, so that the liquid glue flows through the glue feeding holes b1 in two ways respectively, so that the glue flows through each glue feeding hole b1 more evenly, thereby achieving a better molding effect.

[0053] Further, if Figure 6 As shown, in this embodiment, chamfers 41 are provided on both sides of the bottom of the first sealing ring 4, so that a gap is left between the bottom of the first sealing ring 4 and the first sealing groove 32, so that the first sealing ring 4 has a deformation margin when the mold is closed.

[0054] Further, if Figure 6 As shown, in this embodiment, chamfers 51 are provided on both sides of the bottom of the second sealing ring 5, so that a gap is left between the bottom of the second sealing ring 5 and the second sealing groove 35, so that the second sealing ring 5 has a deformation margin when the mold is closed.

[0055] Further, if Figure 1As shown, in this embodiment, a third sealing groove 310 is provided on the lower template 3, and the third sealing groove 310 surrounds a pair of first sealing grooves 32. A third sealing ring 6 is provided in the third sealing groove 310 to improve the sealing between the upper template 2 and the lower template 3, so as to achieve a better vacuuming effect.

[0056] Further, if Figure 1 As shown, in this embodiment, a fourth sealing groove 27 is provided on the upper template 2, and the fourth sealing groove 27 surrounds a pair of glue inlets 22. A fourth sealing ring 7 is provided in the fourth sealing groove 27 to improve the sealing between the flow channel plate 1 and the upper template 2, so as to achieve a better vacuuming effect.

[0057] Furthermore, in this embodiment, the third sealing ring 6 and the fourth sealing ring 7 are made of rubber.

[0058] Working principle: First, place the first sealing ring 4 into the corresponding first sealing groove 32, the second sealing ring 5 into the corresponding second sealing groove 35, the third sealing ring 6 into the corresponding third sealing groove 310, and the fourth sealing ring 7 into the corresponding fourth sealing groove 27; then, close the mold, and the upper template 2 contacts and squeezes the first sealing ring 4 and the second sealing ring 5 to seal the upper template 2 and the lower template 3; then, vacuum the molding cavity a through the exhaust hole 25; then, inject the material, and the liquid glue enters the molding cavity a through the glue inlet 22, the glue inlet channel b, and the glue inlet hole b1 for molding. Finally, after cooling, open the mold and take out the two rubber rings.

[0059] Above, refer to Figures 1 to 12 The invention discloses a vulcanization mold for a rubber ring without flash according to an embodiment of the invention, which solves the sealing problem, enables the product to be molded without flash, saves the cost of rubber raw materials and manual cleaning of flash; solves the problem of automated production of rubber products; through vacuuming and the provision of a glue feeding channel b, glue feeding is made more uniform and faster, resulting in better product molding effect; and can mold two rubber rings at a time, thereby improving work efficiency.

[0060] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0061] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A vulcanization mold for a rubber ring without flash, characterized in that: Include: A flow channel plate, wherein a glue inlet flow channel is provided on the flow channel plate; An upper template is provided with a plurality of guide holes, a pair of glue inlets, a pair of upper forming grooves, and a pair of upper glue inlet grooves; the upper ends of the pair of glue inlets are connected to the glue inlet flow channel, and the lower ends thereof correspond to and are connected to the pair of upper glue inlet grooves one by one; A lower template is provided with a plurality of guide posts, a pair of first sealing grooves, a pair of lower forming grooves, and a pair of lower glue feeding grooves. The plurality of guide posts correspond one-to-one with the plurality of guide holes and can be inserted into the corresponding guide holes. The pair of first sealing grooves, the pair of lower forming grooves, and the pair of lower glue feeding grooves correspond one-to-one. The first sealing groove surrounds the corresponding lower molding groove, and the lower molding groove surrounds the corresponding lower glue feeding groove. A pair of second sealing grooves are symmetrically provided on both sides of each lower glue inlet groove, and the second sealing grooves are provided on the inner circle of the lower molding groove; The upper molding groove and the lower molding groove match each other to form a complete molding cavity; the upper glue feeding groove and the lower glue feeding groove match each other to form a complete glue feeding channel; The glue feeding channel is H-shaped, and a plurality of glue feeding holes are provided at both ends of the glue feeding channel, and the glue feeding holes are connected to the molding cavity; a first sealing ring, the first sealing ring being disposed in the first sealing groove and protruding out of the first sealing groove; a second sealing ring, the second sealing ring being disposed in the second sealing groove and protruding out of the second sealing groove; The first sealing ring and the second sealing ring are made of PEEK material; A pair of residual material grooves are symmetrically provided at both ends of the first sealing groove, and the residual material grooves are communicated with the lower forming groove; A pair of first notches are symmetrically arranged between the lower molding groove and the first sealing groove; a pair of second notches are symmetrically arranged at both ends of the first sealing ring; a pair of third notches are symmetrically arranged between the first sealing groove and the pair of residual material grooves; the first notch, the second notch, the third notch and the residual material groove correspond one to one, and the lower molding groove is connected to the residual material groove through the first notch, the second notch and the third notch.

2. The flashless rubber ring vulcanization mold according to claim 1, characterized in that: The upper template is provided with an air extraction hole and a detection hole. The air extraction hole is connected to one of the residual material troughs, and the detection hole is connected to the other residual material trough.

3. The flashless rubber ring vulcanization mold according to claim 1, characterized in that: A triangular material blocking block is provided at each fork at both ends of the glue feeding channel, so that the liquid glue is divided into two paths and flows through the plurality of glue feeding holes respectively.

4. The flashless rubber ring vulcanization mold according to claim 1, characterized in that: Chamfers are provided on both sides of the bottom of the first sealing ring, so that a gap is left between the bottom of the first sealing ring and the first sealing groove.

5. The flashless rubber ring vulcanization mold according to claim 1, characterized in that: Chamfers are provided on both sides of the bottom of the second sealing ring, so that a gap is left between the bottom of the second sealing ring and the second sealing groove.

6. The flashless rubber ring vulcanization mold according to claim 1, characterized in that: A third sealing groove is provided on the lower template, and the third sealing groove surrounds the pair of first sealing grooves. A third sealing ring is provided in the third sealing groove.

7. The flashless rubber ring vulcanization mold according to claim 1, characterized in that: A fourth sealing groove is provided on the upper template, and the fourth sealing groove surrounds the pair of glue inlets. A fourth sealing ring is provided in the fourth sealing groove.

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