Search

CN-121973386-A - Waterproof key and forming method thereof

CN121973386ACN 121973386 ACN121973386 ACN 121973386ACN-121973386-A

Abstract

The invention relates to the technical field of key injection molding, in particular to a waterproof key and a molding method thereof, wherein S1, a connecting part and a hard glue part are injection molded by adopting a second mold, S2, the key part is connected with the hard glue part to form a first molding piece, S3, a body part is injection molded, the body part is connected with the connecting part and the first molding piece to form a second molding piece, S4, a soft glue part is injection molded, and the soft glue part is connected with the second molding piece to form a key product.

Inventors

  • CHEN ZAN
  • CHEN ZHI
  • CHEN XIANGYANG
  • LIU CHUNYAN

Assignees

  • 深圳美工源塑胶模具有限公司

Dates

Publication Date
20260505
Application Date
20260311

Claims (9)

  1. 1. The forming method of the waterproof key is characterized by comprising the following steps of: s1, adopting a first die (10) to carry out injection molding on a connecting part (2) and a hard rubber part (1); S2, placing the hard rubber part (1) in the S1 into a second die (20), adopting the second die (20) to injection-mold the key part (3), and connecting the molded key part (3) with the hard rubber part (1) to form a first molding piece (4); s3, placing the first molding part (4) in the S2 and the connecting part (2) in the S1 into a third mold (30), and adopting the third mold (30) to perform injection molding on the body part (5), wherein the body part (5) is connected with the connecting part (2) and the first molding part (4) after molding to form a second molding part (6); s4, placing the second molding piece (6) in the S3 into a fourth mold (40), adopting the fourth mold (40) to perform injection molding on the soft rubber part (7), and connecting the molded soft rubber part (7) with the second molding piece (6) to mold a key product (8); In the steps S1-S4, the key part (3) is connected with the hard rubber part (1), the machine body part (5) is connected with the connecting part (2) and the first forming piece (4), the soft rubber part (7) is connected with the second forming piece (6) through injection molding, and the key product (8) is finally in an integrated forming structure.
  2. 2. The molding method of the waterproof key according to claim 1, wherein the first mold (10) comprises a first male mold (101) and a first female mold (102), the first male mold (101) is provided with a hard rubber male mold groove (1011) and a connecting male mold groove (1012) for molding the hard rubber portion (1) and the connecting portion (2), and the first female mold (102) is provided with a hard rubber female mold groove (1021) and a connecting female mold groove (1022) for molding the hard rubber portion (1) and the connecting portion (2); in S1, during molding, a first male die (101) and a first female die (102) are clamped, a hard rubber molding cavity is formed by encircling a hard rubber male die groove (1011) and a hard rubber female die groove (1021), and a connecting molding cavity is formed by encircling a connecting male die groove (1012) and a connecting female die groove (1022) so as to mold a complete hard rubber part (1) and a connecting part (2).
  3. 3. The molding method of the waterproof key according to claim 2, wherein a hard rubber step groove (10211) is further arranged in the hard rubber die groove (1021), a hard rubber molding block (10111) is arranged in the hard rubber die groove (1011), a connecting layering ring (10221) is arranged in the connecting die groove (1022), and a connecting molding block (10121) is arranged in the connecting die groove (1012); After the first male die (101) and the first female die (102) are clamped and molded, the hard rubber part (1) and the connecting part (2) are annular components, the hard rubber part (1) is provided with at least a first step (12) and a second step (13) by adopting a hard rubber step groove (10211), the inner ring of the hard rubber part (1) is provided with a hard rubber connecting section (11) by adopting a hard rubber molding block (10111), the outer end surface of the connecting part (2) is provided with a first connecting section (22) and a second connecting section (23) by adopting a connecting section ring (10221), and the inner ring of the connecting part (2) is provided with a connecting positioning ring (21) by adopting a connecting molding block (10121).
  4. 4. A method for forming a waterproof key according to claim 3, wherein the hard adhesive connecting section (11) and the key part (3) are connected into a first forming piece (4) by injection molding, the lower end face of the hard adhesive part (1) is arranged on the first connecting section (22) and part of the second connecting section (23) of the connecting part (2) so that the first forming piece (4) is arranged on the connecting part (2), the formed main body part (5) and the second connecting end (22) and the first step (12) are connected into a second forming piece (6) by injection molding, and the formed soft adhesive part (7) and the main body part (5) and the second step (13) are connected into a key product (8) by injection molding.
  5. 5. The method for forming a waterproof key according to claim 4, wherein the second mold (20) comprises a second male mold (201) and a second female mold (202), the second male mold (201) is provided with a second male mold groove (2011) for placing the hard rubber part (1) and a key convex column (2012) for forming the key part (3) arranged in the second male mold groove (2011), and the second female mold (202) is provided with a key female mold groove (2021) for forming the key part (3); In S2, during molding, the hard rubber male die groove (1011) is arranged at the second male die groove (2011), the second male die (201) and the second female die (202) are assembled, the second male die groove (2011) and the key female die groove (2012) are surrounded to form a key molding cavity to mold the key part (3), and the molded key part (3) and the hard rubber part (1) are connected to form the first molding part (4).
  6. 6. The method for forming the waterproof key according to claim 5, wherein an inner column forming block (2012) is further arranged in the second male die groove (2011), when the second male die (201) and the second female die (202) are in die assembly forming, an inner end surface of the key part (3) adopts the inner column forming block (2012) to form a key inner column (31), and the key inner column (31) is arranged in a connecting positioning ring (21) of the connecting part (2).
  7. 7. The molding method of the waterproof key according to claim 4, wherein the third mold (30) comprises a third lower mold (302), a third upper mold (301) and a third auxiliary mold (303), wherein the third lower mold (302) is provided with a third lower mold cavity (3021), a third positioning groove (3022) for placing the first molded part (4) is arranged in the third lower mold cavity (3021), and the third upper mold (301) is provided with a third upper mold cavity (3011); In S3, during molding, the first molding part (4) is placed at the third positioning groove (3022), the connecting part (2) is placed at the first molding part (4), the third lower die (302), the third upper die (301) and the third auxiliary die (303) are clamped, the third lower die cavity (3021), the third upper die cavity (3011) and the third auxiliary die (303) are encircled to form a machine body molding cavity to mold the machine body part (5), and the molded machine body part (5), the second connecting end (22) and the first step (12) are connected into a second molding part (6) in an injection molding mode.
  8. 8. The molding method of the waterproof key according to claim 4, wherein the fourth mold (40) comprises a fourth lower mold (402), a fourth upper mold (401) and a fourth auxiliary mold (403), the fourth lower mold (402) is provided with a fourth lower mold cavity (4021), a fourth positioning groove (4022) for placing the second molding member (6) is arranged in the fourth lower mold cavity (4021), and the fourth upper mold (401) is provided with a fourth upper mold cavity (4011); In S4, during molding, the second molding piece (6) is placed at a fourth lower mold cavity (4021) positioned by a fourth positioning groove (4022), the fourth lower mold (402), the fourth upper mold (401) and the fourth auxiliary mold (404) are assembled, the fourth lower mold cavity (4021), the fourth upper mold cavity (4011) and the fourth auxiliary mold (404) are encircled to form a soft rubber molding cavity to mold a soft rubber part (7), and the molded soft rubber part (7), the machine body part (5) and the second step (13) are connected into a key product (8) in an injection molding mode.
  9. 9. The waterproof key is characterized by being manufactured by molding the waterproof key according to any one of claims 1 to 8, the waterproof key product comprises a hard rubber part (1), a connecting part (2), a key part (3), a body part (5) and a soft rubber part (7), the hard rubber part (1) and the key part (3) are connected into a first molded part (4) in an injection molding mode, the connecting part (2), the first molded part (4) and the body part (5) are connected into a second molded part (6) in an injection molding mode, and the second molded part (6) and the soft rubber part (7) are connected into the key product (8) in an injection molding mode.

Description

Waterproof key and forming method thereof Technical Field The invention relates to the technical field of key injection molding, in particular to a waterproof key and a molding method thereof. Background In the injection molding production process of key products, the existing method generally adopts the steps of firstly molding the button keys and the part shells, and then gluing the buttons or the keys and the related shell shells, wherein the conventional gluing mode has poor gluing effect, is easy to loosen and drop, and can generate the phenomena of water leakage and air leakage. For some products with waterproof requirements, the prior art adopts an integral molding mode for injection molding. However, the corresponding product structure is a complex key product, and the key function is stable and reliable, and meanwhile, the demolding structure of the injection molding product cannot be completed by the existing manufacturing technology, so that the product yield of the integrated molding is low, the design cost and the production cost of the mold are high, and the efficiency is low, and therefore, a solution is needed to overcome the technical problems. Disclosure of Invention The invention aims to provide a molding method of a waterproof key, which optimizes injection molding process, realizes step molding of key parts of a product, simplifies a mold structure, reduces production cost, improves production efficiency, reliability of product functions and sealing stability of the waterproof structure, ensures high quality consistency of the key product, and is beneficial to batch production. In order to achieve the above object, the present invention provides the following technical solutions; a molding method of waterproof keys comprises the following steps: s1, adopting a first mould to carry out injection molding on a connecting part and a hard rubber part; S2, placing the hard rubber part in the S1 into a second mold, adopting the second mold to mold the key part, and connecting the molded key part with the hard rubber part to form a first molded part; S3, placing the first formed part in the S2 and the connecting part in the S into a third die, and adopting the third die to carry out injection molding on the body part; S4, placing the second molding piece in the S3 into a fourth mold, adopting the fourth mold to perform injection molding on the soft rubber part, and connecting the molded soft rubber part with the second molding piece to mold a key product; In the steps S1-S4, the key part, the hard rubber part, the machine body part, the connecting part and the first molding piece are connected with each other, and the soft rubber part and the second molding piece are connected with each other by injection molding, so that the key product is finally in an integrated molding structure. Further, the first die comprises a first male die and a first female die, the first male die is provided with a hard rubber male die groove and a connecting male die groove for forming the hard rubber part and the connecting part, and the first female die is provided with a hard rubber female die groove and a connecting female die groove for forming the hard rubber part and the connecting part; In S1, during molding, a first male die and a first female die are assembled, a hard rubber molding cavity is formed by surrounding a hard rubber male die groove and a hard rubber female die groove, and a connecting molding cavity is formed by surrounding a connecting male die groove and a connecting female die groove, so that a complete hard rubber part and a connecting part are molded. Further, a hard rubber step groove is arranged in the hard rubber female die groove, and a hard rubber forming block is arranged in the hard rubber male die groove; After the first male die and the first female die are assembled and molded, the hard rubber part and the connecting part are annular parts, the hard rubber part is provided with at least a first step and a second step by adopting a hard rubber step groove, the inner ring of the hard rubber part is provided with a hard rubber connecting section by adopting a hard rubber molding block, the outer end face of the connecting part is provided with a first connecting section and a second connecting section by adopting a connecting segmented ring, and the inner ring of the connecting part is provided with a connecting positioning ring by adopting a connecting molding block. The hard rubber connecting section and the key part are connected into a first formed part in an injection molding mode, the lower end face of the hard rubber part is arranged on the first connecting section and part of the second connecting section of the connecting part, so that the first formed part is arranged on the connecting part, the formed machine body part, the second connecting end and the first step are connected into a second formed part in an injection molding mode, and the formed soft rubber part, the m