One-step injection molding process

Abstract

The present application discloses a one-time injection molding and overmolding process, which includes: using a positioning member group to position and suspend the part to be overmolded in the injection cavity of the injection mold, wherein the positioning member group includes a plurality of positioning members; injecting a first injection material into the injection cavity at a first injection time and a first injection pressure; when the first injection time reaches a first preset time, controlling the positioning member group to move out of the injection cavity; maintaining the injection pressure in the injection cavity to a second injection time; when the second injection time reaches a second preset time, outputting the overmolded part. In the process of injection molding and overmolding the part to be overmolded, there is no need to flip the part to be overmolded, thereby reducing the processing steps of the injection molding and overmolding process, and further improving the production efficiency of the injection molding and overmolding process.

Description

Technical Field

[0001] The present application relates to the field of injection molding and overmolding, and in particular to a one-step injection molding and overmolding process. Background Art

[0002] In the related art, when the part to be encapsulated is subjected to injection molding and encapsulation processing, the part to be encapsulated is placed in an injection molding cavity, and the end wall of the part to be encapsulated is stopped against the injection mold, and injection molding material is injected into the injection molding cavity. The injection molding material covers the end wall of the part to be encapsulated that is not stopped against the injection mold, and then the part to be encapsulated is turned over, and the end wall of the part to be encapsulated that is covered by the injection molding material is stopped against the injection mold, and injection molding material is injected into the injection molding cavity again. The injection molding material covers the end wall of the part to be encapsulated that is not covered by the injection molding material to complete the injection molding and encapsulation processing of the part. This injection molding and encapsulation processing method requires turning over the part to be encapsulated, which increases the processing steps and reduces the production efficiency of the injection molding and encapsulation processing. Summary of the invention

[0003] In order to reduce the processing steps of injection molding and overmolding and improve the production efficiency of injection molding and overmolding, the present application provides a one-time injection molding and overmolding process.

[0004] The one-step injection molding process provided in this application adopts the following technical solution: A one-step injection molding process comprises: using a positioning member group to position a part to be encapsulated and suspending it in an injection cavity of an injection mold, wherein the positioning member group comprises a plurality of positioning members; injecting a first injection material into the injection cavity at a first injection time and a first injection pressure; when the first injection time reaches a first preset time, controlling the positioning member group to move out of the injection cavity; maintaining the injection pressure in the injection cavity to a second injection time; and when the second injection time reaches a second preset time, outputting the encapsulated part.

[0005] By adopting the above technical solution, the part to be encapsulated is positioned and suspended in the injection cavity of the injection mold by using the positioning member group, and then the first injection material is injected into the injection cavity, and the first injection material is coated on the peripheral wall of the part to be encapsulated, and then when the first injection time reaches the first preset time, the positioning member group is controlled to move out of the injection cavity, and the injection pressure in the injection cavity is maintained to the second injection time. Under the action of the first injection pressure, the first injection material in the injection cavity flows to multiple areas where the part to be encapsulated and the positioning member are opposite, and the first injection material is coated on multiple areas where the part to be encapsulated and the positioning member are opposite. Compared with the prior art, in the process of injection molding and encapsulation of the part to be encapsulated, it is not necessary to flip the part to be encapsulated, thereby reducing the processing steps of the injection molding and encapsulation process, and further improving the production efficiency of the injection molding and encapsulation process.

[0006] Preferably, the injection mold includes a first mold, a second mold, a first drive assembly and a second drive assembly, the first mold and the second mold are relatively arranged along the opening direction of the injection mold, the injection cavity is formed between the first mold and the second mold when the first mold and the second mold are stopped, the multiple positioning members include at least one first positioning member and at least one second positioning member, the first positioning member is slidably arranged in the first mold, the second positioning member is slidably arranged in the second mold, the first positioning member and the second positioning member are relatively arranged along the opening direction of the injection mold, the first drive assembly is arranged in the first mold and connected to the first positioning member, the first drive assembly is used to drive the first positioning member to move closer to or away from the second mold, the second drive assembly is arranged in the second mold and connected to the second positioning member, and the second drive assembly is used to drive the second positioning member to move closer to or away from the first mold.

[0007] By adopting the above technical solution, the first driving component drives the first positioning member to move close to the second mold, the first positioning member stops and positions the part to be encapsulated, the second driving component drives the second positioning member to move close to the second mold, and then drives the second mold to move close to the first mold to close the injection mold. When the second mold stops with the first mold, the second positioning member stops and positions the part to be encapsulated, thereby achieving the technical effect of using the positioning member group to position the part to be encapsulated and suspend it in the injection cavity of the injection mold.

[0008] Preferably, the method of using a positioning member group to position the part to be encapsulated and suspend it in the injection cavity of the injection mold includes the following steps: controlling the first positioning member to move close to the second mold so that the first positioning member extends out of the first mold; installing the part to be encapsulated on the first positioning member; controlling the second positioning member to move close to the first mold so that the second positioning member extends out of the second mold; controlling the second mold to drive the second positioning member to move close to the first mold, and when the second mold stops against the first mold, the second positioning member stops against the part to be encapsulated.

[0009] By adopting the above technical scheme, the first positioning member is controlled to extend out of the first mold, and then the part to be encapsulated is installed on the first positioning member, and the part to be encapsulated is positioned and matched with the first positioning member, and then the second positioning member is controlled to extend out of the second mold, and finally the second mold is controlled to move close to the first mold. When the second mold stops against the first mold, the second positioning member stops and positions the part to be encapsulated, thereby achieving the technical effect of using the first positioning member and the second positioning member to position and suspend the part to be encapsulated in the injection cavity of the injection mold.

[0010] Preferably, at least one positioning hole is provided on the end wall of the part to be encapsulated close to the first positioning member, the positioning hole is arranged opposite to the first positioning member, and the first positioning member is positioned and matched with the positioning hole.

[0011] By adopting the above technical solution, the first positioning member extends into the positioning hole, and the first positioning member abuts and positions against the inner wall of the positioning hole and / or the bottom wall of the positioning hole, thereby preventing the part to be encapsulated from detaching from the first positioning member, and achieving the technical effect of positioning the part to be encapsulated with the first positioning member.

[0012] Preferably, the first mold has a first molding wall, the second mold has a second molding wall, and the first molding wall and the second molding wall are suitable for defining the injection molding cavity. The controlling the positioning member group to move out of the injection molding cavity comprises the following steps: controlling both the first positioning member and the second positioning member to move away from the injection molding cavity; stopping driving the first positioning member when the first positioning member is close to the end wall of the part to be encapsulated and is flush with the first molding wall, and stopping driving the second positioning member when the second positioning member is close to the end wall of the part to be encapsulated and is flush with the second molding wall.

[0013] By adopting the above technical solution, it can be avoided that the first injection material in the injection cavity flows out of the injection cavity along the movement channel of the first positioning member and the movement channel of the second positioning member under the action of the first injection pressure, and it can be avoided that the shape of the encapsulated part cannot match the preset shape of the encapsulated part, and the size of the encapsulated part cannot match the preset size of the encapsulated part, thereby improving the product quality of the encapsulated part.

[0014] Preferably, before controlling the positioning member group to move out of the injection cavity, the one-time injection overmolding process further comprises the following steps: increasing the injection pressure in the injection cavity to a second injection pressure.

[0015] By adopting the above technical solution, under the action of the second injection molding pressure, the first injection molding material in the injection molding cavity can flow more quickly to multiple areas relative to the parts to be encapsulated and the positioning parts, thereby shortening the time for the injection molding process of the parts to be encapsulated, and further improving the efficiency of the injection molding process.

[0016] Preferably, the plurality of positioning members include at least one single-color positioning member and at least one two-color positioning member; controlling the positioning member group to move out of the injection molding cavity comprises the following steps: controlling the single-color positioning member to move out of the injection molding cavity; maintaining the injection pressure in the injection molding cavity to a third injection molding time; when the third injection molding time reaches a third preset time, controlling the two-color positioning member to move out of the injection molding cavity; and injecting the second injection molding material into the injection molding cavity at the first injection molding pressure.

[0017] By adopting the above technical scheme, by controlling the one-color positioning piece to move out of the injection molding cavity, and then maintaining the injection molding pressure in the injection molding cavity to the third injection molding time, the first injection molding material in the injection molding cavity flows to the area where the part to be encapsulated is opposite to the one-color positioning piece, and the first injection molding material is coated on the outer side of the end wall where the part to be encapsulated is opposite to the one-color positioning piece, and then the two-color positioning piece is controlled to move out of the injection molding cavity, and the second injection molding material is injected into the injection molding cavity with the first injection molding pressure, and the second injection molding material is coated on the outer side of the end wall where the part to be encapsulated is opposite to the two-color positioning piece, thereby achieving the technical effect of coating the outside of the part to be encapsulated with two different injection molding materials through one injection molding.

[0018] Preferably, the two-color positioning piece is provided with a forming portion near the end wall of the part to be encapsulated, and the forming portion is suitable for abutting against the part to be encapsulated, and the second injection material fills the injection cavity according to the shape of the forming portion.

[0019] By adopting the above technical scheme, the second injection molding material fills the space between the part to be encapsulated and the molding part, and the second injection molding material is coated on the outer side of the end wall of the part to be encapsulated and the molding part according to the shape of the molding part, thereby achieving the technical effect of controlling the shape of the second injection molding material coated on the outer side of the part to be encapsulated by the molding part. The second injection molding material can present different shapes on the outer side of the part to be encapsulated, thereby improving the user experience of the one-time injection molding process.

[0020] Preferably, before controlling the single-color positioning piece to move out of the injection cavity, the one-time injection overmolding process further comprises the following steps: increasing the injection pressure in the injection cavity to a third injection pressure.

[0021] By adopting the above technical solution, under the action of the third injection molding pressure, the first injection molding material in the injection molding cavity can flow more quickly to the area opposite to the part to be encapsulated and the one-color positioning piece, thereby shortening the time for the injection molding process of the part to be encapsulated, and further improving the efficiency of the injection molding process.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The part to be encapsulated is positioned and suspended in the injection cavity of the injection mold by using the positioning member group, and then the first injection molding material is injected into the injection molding cavity, and the first injection molding material is coated on the outer peripheral wall of the part to be encapsulated. Then, when the first injection molding time reaches the first preset time, the positioning member group is controlled to move out of the injection molding cavity, and the injection molding pressure in the injection molding cavity is maintained until the second injection molding time. Under the action of the first injection molding pressure, the first injection molding material in the injection molding cavity flows to multiple areas where the part to be encapsulated and the positioning member are relative to each other, and the first injection molding material is coated on multiple areas where the part to be encapsulated and the positioning member are relative to each other. Compared with the prior art, in the process of injection molding and encapsulating the part to be encapsulated, it is not necessary to flip the part to be encapsulated, thereby reducing the processing steps of the injection molding and encapsulating process, and further improving the production efficiency of the injection molding and encapsulating process; 2. Under the action of the second injection molding pressure, the first injection molding material in the injection molding cavity can flow more quickly to multiple areas where the parts to be encapsulated and the positioning pieces are opposite, thereby shortening the time for the parts to be encapsulated to undergo the injection molding process, thereby improving the efficiency of the injection molding process; 3. By controlling the one-color positioning piece to move out of the injection molding cavity, and then maintaining the injection molding pressure in the injection molding cavity to the third injection molding time, the first injection molding material in the injection molding cavity flows to the area where the part to be encapsulated is opposite to the one-color positioning piece, and the first injection molding material is coated on the outer side of the end wall where the part to be encapsulated is opposite to the one-color positioning piece, and then the two-color positioning piece is controlled to move out of the injection molding cavity, and the second injection molding material is injected into the injection molding cavity with the first injection molding pressure, and the second injection molding material is coated on the outer side of the end wall where the part to be encapsulated is opposite to the two-color positioning piece, thereby achieving the technical effect of coating the outside of the part to be encapsulated with two different injection molding materials through one injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of a one-step injection molding process according to an embodiment of the present application; Figure 2 is a schematic diagram of an injection mold according to an embodiment of the present application; Figure 3 is a schematic diagram of the injection mold according to another angle in an embodiment of the present application; Figure 4 is a schematic diagram of a partial structure of an injection mold according to an embodiment of the present application; Figure 5 is a schematic diagram of another part of the structure of the injection mold according to an embodiment of the present application; Figure 6 yes Figure 5 The enlarged schematic diagram of point A in the middle; Figure 7 It is a schematic diagram of a two-color positioning member according to an embodiment of the present application.

[0024] Description of reference numerals: 100. Injection mold; 1. Positioning member group; 11. Positioning member; 111. First positioning member; 112. Second positioning member; 113. One-color positioning member; 114. Two-color positioning member; 1141. Forming part; 2. Parts to be coated; 21. Positioning holes; 3. Parts covered with rubber; 4. a first mold; 41. a first molding wall; 5. second mold; 51. second molding wall; 6. A first drive assembly; 7. A second drive assembly. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0026] The embodiment of the present application discloses a one-time injection molding process.

[0027] Reference Figure 1 , Figure 2 and Figure 4 According to the one-time injection molding process described in the embodiment of the present application, the process includes: S1 . Use the positioning member set 1 to position the part 2 to be encapsulated and suspend it in the injection cavity of the injection mold 100 . The positioning member set 1 includes a plurality of positioning members 11 .

[0028] Specifically, the injection mold 100 is first controlled to open, and then the operator places the part to be encapsulated 2 in the injection mold 100, and the part to be encapsulated 2 is positioned and matched with the injection mold 100, so as to prevent the part to be encapsulated 2 from escaping from the injection mold 100 when the injection mold 100 is closed. Finally, the injection mold 100 is controlled to close and the part to be encapsulated 2 is positioned using a plurality of positioning members 11, so as to suspend the part to be encapsulated 2 in the injection cavity of the injection mold 100, that is, the part to be encapsulated 2 is separated from the end wall of the injection mold 100 that constitutes the injection cavity.

[0029] It should be noted that the plurality of positioning members 11 are movably disposed on the injection mold 100 , and the plurality of positioning members 11 extend into or move out of the injection cavity when driven.

[0030] In some specific embodiments, a plurality of positioning members 11 jointly clamp the part 2 to be encapsulated, so that the part 2 to be encapsulated is suspended in the injection cavity of the injection mold 100 .

[0031] S2. Inject the first injection molding material into the injection molding cavity with a first injection molding time and a first injection molding pressure. Specifically, after controlling the injection mold 100 to close the mold, the injection molding machine injects the first injection molding material into the injection molding cavity through the feed port and the feed channel of the injection mold 100. The first injection molding material fills the injection molding cavity, and the first injection molding material is coated on the outer peripheral wall of the part 2 to be coated, and the end wall of the part 2 to be coated opposite to the positioning piece 11 is not coated by the first injection molding material.

[0032] In some specific embodiments, the first injection molding pressure may be 40Mpa-60Mpa. It should be noted that first injection molding materials of different materials have different corresponding first injection molding pressures, and the operator needs to select the corresponding first injection molding pressure according to the material of the first injection molding material.

[0033] In some specific embodiments, the first injection molding material may be silicone, but the present application is not limited thereto. The first injection molding material may also be polypropylene or polycarbonate, etc.

[0034] In some specific embodiments, the first injection molding time may be 20S-40S. It should be noted that first injection molding materials of different materials have different corresponding first injection molding times, and the operator needs to select the corresponding first injection molding time according to the material of the first injection molding material.

[0035] It should be noted that before injecting the first injection material into the injection cavity, the temperature of the injection mold 100 needs to be heated to a preset temperature. In some specific embodiments, the preset temperature may be 130°C, but the present application is not limited thereto. The preset temperature may be 150°C, etc.

[0036] S3. When the first injection time reaches the first preset time, the positioning member group 1 is controlled to move out of the injection cavity. Specifically, the plurality of positioning members 11 are controlled to move away from the injection cavity. The plurality of positioning members 11 are moved out of the injection cavity and extend into the injection mold 100. The plurality of areas of the part 2 to be encapsulated relative to the positioning members 11 are not blocked by the corresponding positioning members 11.

[0037] Furthermore, when the first injection time reaches the first preset time, the injection of the first injection material into the injection cavity is stopped first, and then the positioning member group 1 is controlled to move out of the injection cavity.

[0038] In some specific embodiments, the first preset time may be 20S-40S.

[0039] S4. Maintain the injection pressure in the injection cavity until the second injection time. Specifically, maintain the first injection pressure in the injection cavity until the second injection time. Under the action of the first injection pressure, the first injection material in the injection cavity flows to multiple areas where the part 2 to be encapsulated is opposite to the positioning piece 11, and the first injection material is coated on multiple areas where the part 2 to be encapsulated is opposite to the positioning piece 11, thereby achieving one-time injection molding.

[0040] Moreover, such an arrangement can avoid the generation of connection seams between the injection materials injected into the injection cavity in different sequences when the encapsulated part 2 is subjected to multiple injection molding processes, thereby improving the product quality of the encapsulated part 3.

[0041] In some specific embodiments, the second injection molding time may be 20S-30S. It should be noted that first injection molding materials of different materials have different corresponding second injection molding times, and the operator needs to select the corresponding second injection molding time according to the material of the first injection molding material.

[0042] S5. When the second injection molding time reaches the second preset time, the encapsulated part 3 is output. Specifically, the injection mold 100 is opened, and the operator takes out the encapsulated part 3 from the injection mold 100.

[0043] In some specific embodiments, the second preset time may be 20S-30S.

[0044] Thus, the part to be encapsulated 2 is positioned and suspended in the injection cavity of the injection mold 100 by using the positioning member group 1, and then the first injection material is injected into the injection cavity, and the first injection material is coated on the outer peripheral wall of the part to be encapsulated 2. Then, when the first injection time reaches the first preset time, the positioning member group 1 is controlled to move out of the injection cavity, and the injection pressure in the injection cavity is maintained until the second injection time. Under the action of the first injection pressure, the first injection material in the injection cavity flows to the multiple areas where the part to be encapsulated 2 is opposite to the positioning member 11, and the first injection material is coated on the multiple areas where the part to be encapsulated 2 is opposite to the positioning member 11. Compared with the prior art, in the process of injection molding and encapsulating the part to be encapsulated 2, it is not necessary to flip the part to be encapsulated 2, thereby reducing the processing steps of the injection molding and encapsulating process, and further improving the production efficiency of the injection molding and encapsulating process.

[0045] Reference Figure 2-Figure 4 In some embodiments of the present application, the injection mold 100 includes a first mold 4, a second mold 5, a first drive assembly 6, and a second drive assembly 7. The first mold 4 and the second mold 5 are arranged relatively to each other along the mold opening direction of the injection mold 100. When the first mold 4 and the second mold 5 stop, an injection cavity is formed between the first mold 4 and the second mold 5. Specifically, the mold opening direction of the injection mold 100 can refer to Figure 1In the up-down direction, the first mold 4 is located below the second mold 5 , and the part 2 to be encapsulated is located between the first mold 4 and the second mold 5 .

[0046] The multiple positioning members 11 include at least one first positioning member 111 and at least one second positioning member 112. The first positioning member 111 is slidably disposed in the first mold 4, and the second positioning member 112 is slidably disposed in the second mold 5. The first positioning member 111 and the second positioning member 112 are disposed opposite to each other along the mold opening direction of the injection mold 100, that is, the first positioning member 111 is opposite to the lower end wall of the part 2 to be encapsulated, and the second positioning member 112 is opposite to the upper end wall of the part 2 to be encapsulated.

[0047] The first driving component 6 is disposed on the first mold 4 and is connected and cooperated with the first positioning member 111. The first driving component 6 is used to drive the first positioning member 111 to move closer to or away from the second mold 5. The second driving component 7 is disposed on the second mold 5 and is connected and cooperated with the second positioning member 112. The second driving component 7 is used to drive the second positioning member 112 to move closer to or away from the first mold 4.

[0048] Specifically, the part to be encapsulated 2 is placed between the first mold 4 and the second mold 5, the first driving component 6 drives the first positioning member 111 to move close to the second mold 5, the first positioning member 111 and the part to be encapsulated 2 are stopped and positioned, the second driving component 7 drives the second positioning member 112 to move close to the second mold 5, and then drives the second mold 5 to move close to the first mold 4 to close the injection mold 100, when the second mold 5 and the first mold 4 are stopped, the second positioning member 112 and the part to be encapsulated 2 are stopped and positioned, that is, the part to be encapsulated 2 is clamped between the first positioning member 111 and the second positioning member 112, so that the technical effect of using the positioning member group 1 to position the part to be encapsulated 2 and suspend it in the injection cavity of the injection mold 100 can be achieved.

[0049] In some specific embodiments, the first drive assembly 6 and the second drive assembly 7 may both be cylinders, but the present application is not limited thereto. The first drive assembly 6 and the second drive assembly 7 may also be hydraulic cylinders, etc.

[0050] In some specific embodiments, the part to be encapsulated 2 is provided with multiple positioning areas, and the multiple positioning areas are spaced apart along the radial direction of the part to be encapsulated 2. Both the first positioning member 111 and the second positioning member 112 can be multiple, and the multiple first positioning members 111 and the multiple second positioning members 112 are spaced apart along the radial direction of the injection mold 100, and the multiple first positioning members 111, the multiple second positioning members 112 and the multiple positioning areas are arranged in a one-to-one correspondence. By utilizing the multiple first positioning members 111 and the multiple second positioning members 112 to jointly position the part to be encapsulated 2, the positioning reliability of the part to be encapsulated 2 in the injection molding cavity can be improved.

[0051] In some specific embodiments, when the shape of the part to be encapsulated 2 is constructed as a special-shaped part, the lengths of the multiple first positioning members 111 and the lengths of the multiple second positioning members 112 need to match the shapes of the special-shaped parts. The first drive assembly 6 and the second drive assembly 7 both include multiple cylinders. The multiple cylinders of the first drive assembly 6 are arranged in a one-to-one correspondence with the multiple first positioning members 111. The multiple cylinders of the first drive assembly 6 drive the corresponding first positioning members 111 to move closer to or away from the second mold 5, thereby achieving the technical effect of individually controlling the movement stroke of the first positioning members 111. The multiple cylinders of the second drive assembly 7 are arranged in a one-to-one correspondence with the multiple second positioning members 112. The multiple cylinders of the second drive assembly 7 drive the corresponding second positioning members 112 to move closer to or away from the first mold 4, thereby achieving the technical effect of individually controlling the movement stroke of the second positioning members 112.

[0052] Reference Figure 2-Figure 4 In some embodiments of the present application, the positioning member set 1 is used to position and suspend the part 2 to be encapsulated in the injection cavity of the injection mold 100, including the following steps: S11. Control the first positioning member 111 to move close to the second mold 5 so that the first positioning member 111 extends out of the first mold 4. Specifically, use the first driving component 6 to drive the first positioning member 111 to move close to the second mold 5. The first positioning member 111 extends out of the first mold 4 and close to the end wall of the second mold 5. When the first positioning member 111 moves to the preset position, the first driving component 6 stops driving the first positioning member 111.

[0053] It should be noted that, when there are multiple first positioning members 111 , the first driving assembly 6 synchronously drives the multiple first positioning members 111 to move closer to the second mold 5 .

[0054] S12, installing the part to be encapsulated 2 on the first positioning piece 111. Specifically, the part to be encapsulated is installed on the end of the first positioning piece 111 away from the first mold 4, and the part to be encapsulated 2 is positioned and matched with the first positioning piece 111, so as to prevent the part to be encapsulated 2 from detaching from the injection mold 100.

[0055] S13, control the second positioning member 112 to move close to the first mold 4 so that the second positioning member 112 extends out of the second mold 5. Specifically, the second driving component 7 is used to drive the second positioning member 112 to move close to the first mold 4, and the second positioning member 112 extends out of the second mold 5 close to the end wall of the first mold 4. When the second positioning member 112 moves to the preset position, the second driving component 7 stops driving the second positioning member 112.

[0056] It should be noted that, when there are multiple second positioning members 112 , the second driving assembly 7 synchronously drives the multiple second positioning members 112 to move closer to the first mold 4 .

[0057] S14, control the second mold 5 to drive the second positioning member 112 to move close to the first mold 4, when the second mold 5 and the first mold 4 stop, the second positioning member 112 and the part to be encapsulated 2 stop, specifically, drive the second mold 5 to move close to the first mold 4, the second mold 5 drives the second positioning member 112 to move close to the part to be encapsulated 2, when the second mold 5 and the first mold 4 stop, that is, when the injection mold 100 is closed, the second positioning member 112 is away from the end of the second mold 5 and the stop of the part to be encapsulated 2, and the second positioning member 112 is positioned and matched with the part to be encapsulated 2, the part to be encapsulated 2 is clamped between the first positioning member 111 and the second positioning member 112, and the first positioning member 111 and the second positioning member 112 jointly clamp the part to be encapsulated 2.

[0058] By controlling the first positioning member 111 to extend out of the first mold 4, and then installing the part 2 to be encapsulated on the first positioning member 111, and the part 2 to be encapsulated is positioned and matched with the first positioning member 111, and then controlling the second positioning member 112 to extend out of the second mold 5, and finally controlling the second mold 5 to move close to the first mold 4, when the second mold 5 and the first mold 4 stop, the second positioning member 112 and the part 2 to be encapsulated are stopped and positioned and matched, so that the technical effect of using the first positioning member 111 and the second positioning member 112 to position and suspend the part 2 to be encapsulated in the injection cavity of the injection mold 100 can be achieved.

[0059] Reference Figure 5 and Figure 6 In some embodiments of the present application, at least one positioning hole 21 is provided on the end wall of the part 2 to be encapsulated near the first positioning piece 111, the positioning hole 21 is arranged opposite to the first positioning piece 111, and the first positioning piece 111 is positioned and matched with the positioning hole 21. Specifically, the first positioning piece 111 extends into the positioning hole 21, and the first positioning piece 111 abuts and positions against the inner peripheral wall of the positioning hole 21 and / or the bottom wall of the positioning hole 21, thereby preventing the part 2 to be encapsulated from being separated from the first positioning piece 111, and achieving the technical effect of positioning and matching the part 2 to be encapsulated with the first positioning piece 111.

[0060] When a vertical injection molding machine is used to perform injection molding on the part 2 to be coated with rubber, the bottom wall of the positioning hole 21 stops and positions the first positioning piece 111. When a horizontal injection molding machine is used to perform injection molding on the part 2 to be coated with rubber, the inner wall of the positioning hole 21 stops and positions the first positioning piece 111.

[0061] In some specific embodiments, there are multiple positioning holes 21, and the multiple positioning holes 21 are spaced apart along the radial direction of the part to be encapsulated 2. The multiple positioning holes 21 are arranged in a one-to-one correspondence with the multiple first positioning members 111. Through the positioning and matching of the multiple positioning holes 21 and the multiple first positioning members 111, the positioning reliability between the part to be encapsulated 2 and the first positioning members 111 can be improved, and the part to be encapsulated 2 and the first positioning members 111 can be prevented from being separated.

[0062] Reference Figure 2-Figure 4 In some embodiments of the present application, the first mold 4 has a first molding wall 41, which is located at the end wall of the first mold 4 close to the second mold 5, and the second mold 5 has a second molding wall 51, which is located at the end wall of the second mold 5 close to the first mold 4. When the first mold 4 and the second mold 5 stop, the first molding wall 41 and the second molding wall 51 are suitable for defining an injection cavity.

[0063] Controlling the positioning member group 1 to move out of the injection molding cavity comprises the following steps: S311, control the first positioning member 111 and the second positioning member 112 to move away from the injection cavity. Specifically, when the first injection time reaches the first preset time, the first driving component 6 is used to drive the first positioning member 111 to move away from the injection cavity so that the first positioning member 111 and the part to be encapsulated 2 are separated, and the second driving component 7 is used to drive the second positioning member 112 to move away from the injection cavity so that the second positioning member 112 and the part to be encapsulated 2 are separated.

[0064] S312, stop driving the first positioning member 111 when the end wall of the part to be encapsulated 2 is flush with the first molding wall 41, and stop driving the second positioning member 112 when the end wall of the part to be encapsulated 2 is flush with the second molding wall 51. Specifically, when the first positioning member 111 is flush with the end wall of the part to be encapsulated 2 and the first molding wall 41, the first driving component 6 stops driving the first positioning member 111 to move, and when the second positioning member 112 is flush with the end wall of the part to be encapsulated 2 and the second molding wall 51, the second driving component 7 stops driving the second positioning member 112 to move. In other words, the first molding wall 41, the end wall of the part to be encapsulated 2 close to the first positioning member 111, the second molding wall 51, and the end wall of the part to be encapsulated 2 close to the second positioning member 112 jointly define an injection cavity.

[0065] Such a configuration can prevent the first injection material in the injection cavity from flowing out of the injection cavity along the movement channel of the first positioning member 111 and the movement channel of the second positioning member 112 under the action of the first injection pressure, and can prevent the shape of the encapsulated part 3 from not matching the preset shape of the encapsulated part 3, and the size of the encapsulated part 3 from not matching the preset size of the encapsulated part 3, thereby improving the product quality of the encapsulated part 3.

[0066] In some embodiments of the present application, before the positioning member group 1 is controlled to move out of the injection molding cavity, the one-step injection molding process may further include the following steps: S6. Increase the injection molding pressure in the injection molding cavity to the second injection molding pressure. Specifically, increase the first injection molding pressure to the second injection molding pressure. Under the action of the second injection molding pressure, the first injection molding material in the injection molding cavity can flow more quickly to multiple areas relative to the part 2 to be encapsulated and the positioning piece 11, thereby shortening the time for the injection molding process of the part 2 to be encapsulated, and further improving the efficiency of the injection molding process.

[0067] Moreover, when the fluidity of the first injection molding material is poor, the second injection molding pressure can drive the first injection molding material with poor fluidity to flow to multiple areas relative to the part 2 to be encapsulated and the positioning piece 11, thereby avoiding the first injection molding material from being unable to completely cover the part 2 to be encapsulated, thereby improving the product quality of the part 2 to be encapsulated.

[0068] In some specific embodiments, the second injection molding pressure may be 60 MPa-80 MPa. It should be noted that different materials of the first injection molding materials have different corresponding second injection molding pressures. The operator needs to select the corresponding second injection molding pressure according to the material of the first injection molding material.

[0069] Reference Figure 2-Figure 4 In some embodiments of the present application, the plurality of positioning members 11 include at least one single-color positioning member 113 and at least one two-color positioning member 114. Specifically, the single-color positioning member 113 may be the first positioning member 111 and / or the second positioning member 112, and the two-color positioning member 114 may be the first positioning member 111 and / or the second positioning member 112.

[0070] In some specific embodiments, the one-color positioning element 113 is the first positioning element 111 , and the two-color positioning element 114 is the second positioning element 112 .

[0071] Controlling the positioning member group 1 to move out of the injection molding cavity comprises the following steps: S321, control the single-color positioning piece 113 to move out of the injection cavity. Specifically, use the first driving component 6 to drive the single-color positioning piece 113 to move out of the injection cavity. When the first color positioning piece 113 is close to the end wall of the part 2 to be encapsulated and is flush with the first molding wall 41, the first driving component 6 stops driving the single-color positioning piece 113, and the area opposite to the part 2 to be encapsulated and the single-color positioning piece 113 is not blocked by the single-color positioning piece 113.

[0072] It should be noted that before the single-color positioning piece 113 is controlled to move out of the injection molding cavity, the area of ​​the part 2 to be encapsulated that is not opposite to the positioning piece 11 is covered with the first injection molding material, and the first injection molding material and the first molding wall 41 and the second molding wall 51 are both stopped, thereby fixing the part 2 to be encapsulated in the injection molding cavity. When the single-color positioning piece 113 is moved out of the injection molding cavity, the part 2 to be encapsulated remains in a fixed position relative to the injection molding cavity.

[0073] S322, maintain the injection pressure in the injection cavity to the third injection time. Specifically, maintain the first injection pressure in the injection cavity to the third injection time. Under the action of the first injection pressure, the first injection material in the injection cavity flows to the area where the part 2 to be encapsulated is opposite to the one-color positioning piece 113, and the first injection material is coated on the outer side of the end wall where the part 2 to be encapsulated is opposite to the one-color positioning piece 113.

[0074] In some specific embodiments, the third injection molding time may be 20S-30S. It should be noted that different first injection molding materials have different corresponding third injection molding times, and the operator needs to select the corresponding third injection molding time according to the material of the first injection molding material.

[0075] S323. When the third injection molding time reaches the third preset time, the two-color positioning member 114 is controlled to move out of the injection molding cavity. Specifically, the second driving component 7 is used to drive the two-color positioning member 114 to move out of the injection molding cavity. When the second color positioning member 114 is close to the end wall of the part 2 to be encapsulated and is flush with the second molding wall 51, the second driving component 7 stops driving the two-color positioning member 114, and the area opposite to the part 2 to be encapsulated and the two-color positioning member 114 is not blocked by the two-color positioning member 114.

[0076] S324, injecting the second injection molding material into the injection molding cavity with the first injection molding pressure. Specifically, injecting the second injection molding material into the injection molding cavity, the second injection molding material flows into the area where the part to be encapsulated 2 is opposite to the two-color positioning piece 114, and then the second injection molding material is coated on the outer side of the end wall where the part to be encapsulated 2 is opposite to the two-color positioning piece 114.

[0077] It should be noted that the injection mold 100 has two feed ports and two feed channels, one of the two feed ports is connected to one of the two feed channels, and the other feed port is connected to the other feed channel, the first injection material enters the injection cavity through one feed port and one feed channel, and the second injection material enters the injection cavity through the other feed port and the other feed channel.

[0078] In some specific embodiments, the first injection molding material may be yellow silicone, and the second injection molding material may be red silicone, but the present application is not limited thereto. The first injection molding material may also be yellow polypropylene, and the second injection molding material may also be blue polypropylene, etc.

[0079] By controlling the one-color positioning piece 113 to move out of the injection cavity and then maintaining the injection pressure in the injection cavity to the third injection time, the first injection molding material in the injection cavity flows to the area where the part 2 to be encapsulated is opposite to the one-color positioning piece 113, and the first injection molding material is coated on the outer side of the end wall where the part 2 to be encapsulated is opposite to the one-color positioning piece 113, and then the two-color positioning piece 114 is controlled to move out of the injection cavity, and the second injection molding material is injected into the injection cavity with the first injection molding pressure, and the second injection molding material is coated on the outer side of the end wall where the part 2 to be encapsulated is opposite to the two-color positioning piece 114, thereby achieving the technical effect of coating the outer side of the part 2 to be encapsulated with two different injection molding materials through one injection molding.

[0080] Reference Figure 4 and Figure 7 In some embodiments of the present application, a two-color positioning member 114 is provided with a forming portion 1141 near the end wall of the part to be encapsulated 2, and the forming portion 1141 is suitable for abutting against the part to be encapsulated 2, and the second injection molding material fills the injection molding cavity according to the shape of the forming portion. By providing the forming portion 1141 on the two-color positioning member 114, after controlling the two-color positioning member 114 to move away from the injection molding cavity, the second injection molding material fills the space relative to the part to be encapsulated 2 and the forming portion, and the second injection molding material is coated on the outer side of the end wall relative to the forming portion of the part to be encapsulated 2 according to the shape of the forming portion, thereby achieving the technical effect of controlling the shape of the second injection molding material coated on the outer side of the part to be encapsulated 2 by using the forming portion 1141, and the second injection molding material can present different shapes on the outer side of the part to be encapsulated 2, thereby improving the user experience of the one-time injection molding process.

[0081] Furthermore, the designer may design the shape of the forming portion 1141 according to the preset shape of the encapsulated component 3 .

[0082] In some embodiments of the present application, before controlling the single-color positioning member 113 to move out of the injection molding cavity, the one-step injection molding process may further include the following steps: S325. Increase the injection molding pressure in the injection molding cavity to a third injection molding pressure. Specifically, increase the first injection molding pressure to the third injection molding pressure. Under the action of the third injection molding pressure, the first injection molding material in the injection molding cavity can flow more quickly to the area opposite to the part 2 to be encapsulated and the one-color positioning piece 113, thereby shortening the time for the injection molding process of the part 2 to be encapsulated, and further improving the efficiency of the injection molding process.

[0083] Moreover, when the fluidity of the first injection molding material is poor, the third injection molding pressure can drive the first injection molding material with poor fluidity to flow to the area opposite to the part 2 to be encapsulated and the one-color positioning piece 113, thereby avoiding the first injection molding material from being unable to completely cover the part 2 to be encapsulated, thereby improving the product quality of the part 2 to be encapsulated.

[0084] In some specific embodiments, the third injection molding pressure may be 50 MPa-70 MPa. It should be noted that the third injection molding pressures corresponding to the first injection molding materials of different materials are different. The operator needs to select the corresponding third injection molding pressure according to the material of the first injection molding material.

[0085] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A one-time injection molding process, characterized in that: include: The part to be encapsulated is positioned and suspended in the injection cavity of the injection mold by using a positioning member group, wherein the positioning member group includes a plurality of positioning members; Injecting a first injection material into the injection cavity at a first injection time and a first injection pressure; When the first injection time reaches a first preset time, controlling the positioning member assembly to move out of the injection cavity; Maintaining the injection pressure in the injection cavity until a second injection time; When the second injection molding time reaches the second preset time, the encapsulated part is output.

2. The one-step injection molding process according to claim 1, characterized in that: The injection mold includes a first mold, a second mold, a first driving assembly and a second driving assembly. The first mold and the second mold are relatively arranged along the opening direction of the injection mold. When the first mold and the second mold are stopped, the injection cavity is formed between the first mold and the second mold. The multiple positioning members include at least one first positioning member and at least one second positioning member. The first positioning member is slidably arranged in the first mold, and the second positioning member is slidably arranged in the second mold. The first positioning member and the second positioning member are relatively arranged along the opening direction of the injection mold. The first driving assembly is arranged in the first mold and connected to the first positioning member. The first driving assembly is used to drive the first positioning member to move closer to or away from the second mold. The second driving assembly is arranged in the second mold and connected to the second positioning member. The second driving assembly is used to drive the second positioning member to move closer to or away from the first mold.

3. A one-time injection molding process according to claim 2, characterized in that: The method of positioning the part to be encapsulated by using the positioning member group and suspending it in the injection cavity of the injection mold comprises: Controlling the first positioning member to move closer to the second mold so that the first positioning member extends out of the first mold; Installing the part to be encapsulated on the first positioning piece; Controlling the second positioning member to move closer to the first mold so that the second positioning member extends out of the second mold; The second mold is controlled to drive the second positioning member to move close to the first mold. When the second mold abuts against the first mold, the second positioning member abuts against the part to be encapsulated.

4. The one-step injection molding process according to claim 2, characterized in that: At least one positioning hole is provided on the end wall of the part to be encapsulated close to the first positioning piece. The positioning hole is arranged opposite to the first positioning piece, and the first positioning piece is positioned and matched with the positioning hole.

5. The one-step injection molding process according to claim 2, characterized in that: The first mold has a first molding wall, the second mold has a second molding wall, and the first molding wall and the second molding wall are suitable for defining the injection molding cavity; The step of controlling the positioning member assembly to move out of the injection molding cavity comprises: Controlling the first positioning member and the second positioning member to move away from the injection cavity; The first positioning member is stopped when the end wall of the part to be encapsulated is flush with the first molding wall, and the second positioning member is stopped when the end wall of the part to be encapsulated is flush with the second molding wall.

6. The one-step injection molding process according to claim 1, characterized in that Before controlling the positioning member group to move out of the injection cavity, the method also includes: increasing the injection pressure in the injection cavity to a second injection pressure.

7. The one-step injection molding process according to claim 1, characterized in that: The plurality of positioning members include at least one one-color positioning member and at least one two-color positioning member; The step of controlling the positioning member assembly to move out of the injection molding cavity comprises: Controlling the one-color positioning member to move out of the injection molding cavity; maintaining the injection pressure in the injection cavity until a third injection time; When the third injection time reaches a third preset time, controlling the two-color positioning member to move out of the injection cavity; A second injection material is injected into the injection cavity at the first injection pressure.

8. The one-step injection molding process according to claim 7, characterized in that: The two-color positioning piece is provided with a forming part near the end wall of the part to be encapsulated, and the forming part is suitable for abutting against the part to be encapsulated, and the second injection material fills the injection cavity according to the shape of the forming part.

9. The one-step injection molding process according to claim 7, characterized in that: Before controlling the one-color positioning member to move out of the injection cavity, the method further includes: increasing the injection pressure in the injection cavity to a third injection pressure.

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