An injection mold for automotive trim parts

Abstract

This application relates to an injection mold for automotive trim parts, comprising a lower injection mold and an upper injection mold; the upper injection mold includes an upper mold base and an upper mold core; the lower injection mold includes a lower mold base and a lower mold core; the lower injection mold further includes a first core-pulling assembly, a second core-pulling assembly, and a first driving mechanism; the upper mold core, lower mold core, first core-pulling assembly, and second core-pulling assembly form an injection cavity for molding automotive trim parts when the mold is closed; the first core-pulling assembly includes a first core-pulling seat, a first core-pulling block, and a first core-pulling post; the first core-pulling seat has a molding insertion hole structure; the upper mold core has a molding upper part; the first core-pulling block has a molding lower part; the first core-pulling seat has a first slide rail, and the first core-pulling block has a first slide groove; the first core-pulling seat is provided with a first spring; a first limiting mechanism is also provided between the first core-pulling seat and the first core-pulling block; the first core-pulling seat is provided with a second spring. This application achieves the effect of injection molding automotive trim parts.

Description

Technical Field

[0001] This application relates to the field of injection mold technology, and in particular to an injection mold for automotive trim parts. Background Technology

[0002] Injection molds are tools used to produce plastic products. Molten plastic is injected into the mold, and after cooling and solidification, a molded product is obtained. In the production of automotive trim parts, specific injection molds are required to produce the desired trim parts.

[0003] Reference Figure 1 and Figure 2 An automotive trim component includes a plastic chassis 1, a mounting socket 2 disposed on the top of the plastic chassis 1, a mounting piece 11 connected to the side edge of the plastic chassis 1, and two plastic conduits 3 symmetrically disposed on the top of the plastic chassis 1. The mounting socket 2 and the mounting piece 11 are both symmetrically arranged about the two plastic conduits 3. The plastic conduits 3 are L-shaped and include a first conduit 31 and a second conduit 32. The second conduit 32 includes a first tube portion 321 and a second tube portion 322 along a direction away from the first conduit 31. The first tube portion 321 has a conduit annular groove 3211. The width of the mounting piece 11 gradually increases along a direction away from the plastic chassis 1. The mounting piece 11 forms a notch 12 with the circumferential sidewall of the plastic chassis 1. A metal insert 4 is disposed within the mounting socket 2. The metal insert 4 includes a horizontally arranged pin portion 41 and an inner portion 42 connected to the pin portion 41 and disposed inside the mounting socket 2. During the injection molding of the aforementioned automotive trim parts, the structure of the plastic conduit 3 having a conduit annular groove 3211 and the mounting plate 11 having a notch groove 12 between the plastic chassis 1 and the plastic conduit 3 causes the unidirectional core-pulling structure to interfere with the structure at the conduit annular groove 3211, making the unidirectional core-pulling structure unable to meet the core-pulling requirements of the aforementioned plastic conduit 3.

[0004] In view of the aforementioned technologies, the inventors believe there is a need to provide an injection mold that can be applied to the aforementioned automotive trim injection molding process. Summary of the Invention

[0005] In order to achieve the injection molding of the above-mentioned automotive trim parts, this application provides an injection mold for automotive trim parts.

[0006] The injection mold for an automotive trim part provided in this application adopts the following technical solution:

[0007] An injection mold for automotive trim parts includes a lower injection mold and an upper injection mold; the upper injection mold includes an upper mold base and an upper mold core mounted on the upper mold base; the lower injection mold includes a lower mold base and a lower mold core mounted on the lower mold base; the lower injection mold further includes a first core-pulling assembly mounted on the lower mold base and corresponding to two plastic conduits, a second core-pulling assembly mounted on the lower mold base and corresponding to a mounting socket, and a first drive mechanism for driving the first core-pulling assembly; the upper mold core, the lower mold core, the first core-pulling assembly, and the second core-pulling assembly constitute an injection cavity for molding automotive trim parts when the mold is closed; the first core-pulling assembly includes a first core-pulling seat, a first core-pulling block inclinedly slidably mounted on the first core-pulling seat, and a first core-pulling post vertically slidably mounted on the first core-pulling seat for molding a notch; the first core-pulling seat has a forming section for molding... The second tube section has a molding insertion hole structure; the upper mold core has a molding upper part for molding the first tube section; the first core-pulling block has a molding lower part for molding the first tube section and cooperating with the molding upper part; the first core-pulling seat has a first slide rail arranged inclined upward along the core-pulling direction, and the first core-pulling block has a first slide groove cooperating with the first slide rail; the first core-pulling seat is provided with a first spring, and the first spring drives the first core-pulling block to always have a tendency to slide downward along the first slide rail; a first limiting mechanism is also provided between the first core-pulling seat and the first core-pulling block to limit the sliding range of the first core-pulling block; the top of the first core-pulling post abuts against the upper injection mold, and the first core-pulling seat is provided with a second spring for driving the first core-pulling post to be lifted up. When the injection mold of the automotive trim part is opened, the second spring drives the first core-pulling post to disengage from the notch groove.

[0008] By adopting the above technical solution, after the automotive trim part is formed in the injection cavity, the upper mold base moves upward relative to the lower mold base, and the upper part of the molded part separates from the upper half of the guide ring groove. The second spring pushes the first core-pulling post upward, so that the first core-pulling post separates from the notch groove. The first spring allows the first core-pulling block to move downward relative to the first core-pulling seat when the first core-pulling assembly is pulling the core, so that the lower part of the molded part moves vertically downward relative to the guide ring groove and separates from the lower half of the guide ring groove. The first limiting mechanism allows the first core-pulling seat to drive the first core-pulling block to move in the core-pulling direction under the action of the first driving mechanism after the lower part of the molded part separates from the lower half of the guide ring groove. The second core-pulling assembly allows the second core-pulling assembly to separate from the mounting socket along the core-pulling direction when the mold is opened. The injection mold for automotive trim parts provided in this application can realize the core-pulling action of the plastic guide, thereby realizing the injection molding of the above-mentioned automotive trim parts.

[0009] Optionally, the lower mold core is provided with a limiting post on one side of the first core-pulling seat, and the limiting post is provided with a limiting protrusion on the side facing the first core-pulling seat; the first core-pulling block has a vertical slide groove for arranging the limiting protrusion and a guide slide groove communicating with the top of the vertical slide groove, the guide slide groove being located on the side of the vertical slide groove facing away from the core-pulling direction; when the lower molded part is disengaged from the first tube part, the limiting protrusion is disengaged from the vertical slide groove and faces the guide slide groove.

[0010] By adopting the above technical solution, during mold opening, the first core-pulling seat moves towards the core-pulling direction under the drive of the first driving mechanism. The setting of the limiting protrusion allows the side wall of the vertical slide of the first core-pulling block to abut against the limiting protrusion. Under the drive of the limiting protrusion, the first core-pulling block can move downward relative to the first core-pulling seat along the vertical slide, so that the lower part of the molding separates downward from the guide ring groove. When the limiting protrusion separates from the vertical slide, the setting of the guide slide ensures that when the first core-pulling block and the first core-pulling seat move synchronously along the core-pulling direction, they will not interfere with the limiting column.

[0011] Optionally, the first limiting mechanism includes a first limiting groove formed in the first core-pulling seat and parallel to the first slide rail, and a first limiting post arranged in the first core-pulling block and cooperating with the first limiting groove.

[0012] By adopting the above technical solution, the specific structure of the first core-pulling assembly is disclosed. The setting of the first limiting groove and the first limiting post enables the first limiting groove to abut against the first limiting post at the end facing away from the core-pulling direction when the first core-pulling seat moves toward the core-pulling direction, thereby driving the first core-pulling block to move synchronously with the first core-pulling seat toward the core-pulling direction.

[0013] Optionally, the first core-pulling block has a first arrangement slot for arranging the first spring, the first arrangement slot being parallel to the first slide rail, and the first core-pulling seat is equipped with a first insert that is inserted into the first arrangement slot and is used for arranging the first spring.

[0014] By adopting the above technical solution, the setting of the first arrangement groove enables the first spring to drive the first core-pulling block to move downward relative to the first core-pulling seat during mold opening; the setting of the first insertion post makes the stability of the first spring ideal during the compression / extension process, which helps to improve the stability of the first spring driving the first core-pulling block to move.

[0015] Optionally, the first core-pulling post includes a second body, a second sliding part, a second forming part disposed at the bottom of the second sliding part and used to form a notch, and a second driving plate connected to the top of the second body; the first core-pulling seat has an installation groove for arranging the first core-pulling post, the installation groove including a sliding groove for the second sliding part to slide up and down and a driving groove for the second driving plate to slide up and down; the bottom surface of the driving groove has a spring arrangement groove for arranging the second spring; a limiting plate for restricting the first core-pulling post from disengaging is installed on the top of the first core-pulling seat.

[0016] By adopting the above technical solution, the specific structure of the first core-pulling post and the first core-pulling seat is disclosed; the setting of the second molding part can realize the molding of the notch groove; the setting of the second spring can push the first core-pulling post upward when the mold is opened, thereby separating the second molding part from the notch groove; the cooperation between the second sliding part and the sliding groove body and the cooperation between the second driving plate and the driving groove body can drive the second sliding part and the second driving plate to move upward along the sliding groove body and the driving groove body respectively when the mold is opened, which helps to improve the stability of the first core-pulling post when it moves upward; the setting of the limiting plate ensures that the second spring will not separate from the first core-pulling seat when it drives the first core-pulling post to move upward.

[0017] Optionally, the first driving mechanism includes a first driving block slidably mounted on the lower mold base along the core-pulling direction of the first core-pulling assembly, a driving link connected to the first driving block, and a driving cylinder mounted on the lower mold base for driving the first driving block to move; the driving link has a piston rod groove for inserting the piston rod of the driving cylinder; both first core-pulling seats are fixedly mounted on the first driving block.

[0018] By adopting the above technical solution, the specific structure of the first driving mechanism is disclosed. When the mold is opened, the driving cylinder can drive the first driving block to move toward the core-pulling direction of the first core-pulling assembly. Since the two first core-pulling seats are fixedly installed on the first driving block, the two first core-pulling seats can move synchronously with the first driving block to realize the core-pulling action. The setting of the piston rod groove ensures that the piston rod of the driving cylinder always maintains the same contact position with the driving connecting rod during the extension / contraction process, which helps to improve the stability when the driving cylinder drives the first driving block to move.

[0019] Optionally, the piston rod of the driving cylinder is provided with limiting planes on both the upper and lower sides; the limiting plane on the upper side is in contact with the inner top surface of the piston rod groove, and the limiting plane on the lower side is in contact with the inner bottom surface of the piston rod groove.

[0020] By adopting the above technical solution, the cooperation between the limiting plane and the piston rod groove ensures that the piston rod of the driving cylinder will not rotate during the extension / contraction process.

[0021] Optionally, the first drive block is provided with a first locking surface on the side opposite to the first core-pulling seat; the upper mold base is provided with a first locking module, the first locking module having a first locking structure that cooperates with the first locking surface.

[0022] By adopting the above technical solution, the cooperation between the first locking surface and the first locking structure enables the first locking module to fix the first driving block on the lower mold base during mold closing, thereby reducing the probability of the first driving block moving during injection molding.

[0023] Optionally, the second core-pulling assembly includes a second core-pulling seat that is slidably mounted along the core-pulling direction and a second core-pulling block mounted on the second core-pulling seat; the end of the second core-pulling block is provided with a mounting hole for mounting the pin portion of the metal insert; the second core-pulling block is also provided with a support protrusion for supporting the built-in portion of the metal insert.

[0024] By adopting the above technical solution, the specific structure of the second core-pulling assembly is disclosed. The pin part can be installed in the mounting socket, so that the metal rod can be fixed in the mounting socket during injection molding, and the pin part can be detached from the mounting socket during mold opening. The setting of the support protrusion enables the metal rod to be installed in the second core-pulling block in a specific position.

[0025] Optionally, the upper mold base is equipped with a drive slant for moving the second core-pulling seat during mold opening; the second core-pulling seat has a drive through groove for arranging the drive slant; the inner wall of the drive through groove has a limit arrangement groove, a limit rod slidably installed in the limit arrangement groove, and an elastic element installed in the limit arrangement groove to drive the limit rod to always extend out of the limit arrangement groove; the limit rod has a guide slope on the side facing the opening of the drive through groove and an abutment plane on the side facing away from the opening of the drive through groove.

[0026] By adopting the above technical solution, when the mold is opened, the upper mold base moves upward relative to the lower mold base, and the driving inclined rod can slide in the driving through groove and abut against the limiting plane of the limiting rod to drive the second core-pulling seat to move in the core-pulling direction; the setting of the guide inclined surface and the elastic element allows the driving inclined rod to abut against the guide inclined surface to squeeze the elastic element when the mold is closed, and the driving inclined rod can slide over the guide inclined surface and move towards the inside of the driving through groove, so that the driving inclined rod can abut against the limiting plane when the mold is opened.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. An injection mold for automotive trim parts, comprising installing a first core-pulling assembly and a first driving mechanism on a lower mold base, wherein after the automotive trim part is formed in the injection cavity and during mold opening, the first core-pulling post moves upward under the action of a second spring to separate from the notch groove; the first spring drives the first core-pulling block to move downward, causing the lower part of the molded part to detach from the lower half of the guide ring groove, and under the action of the first driving mechanism and the first limiting mechanism, the first core-pulling block and the first core-pulling seat move synchronously towards the core-pulling direction of the first core-pulling assembly to separate from the automotive trim part; the second core-pulling assembly separates from the mounting socket; thereby enabling the core-pulling action of the automotive trim part, thereby enabling the injection molding of the automotive trim part;

[0029] 2. By setting a limiting post on the lower mold core, the limiting protrusion of the limiting post can abut against the vertical slide groove of the first core-pulling block, so that when the mold is opened, the first core-pulling block moves downward relative to the first core-pulling seat under the drive of the limiting protrusion, so that the lower part of the molded part disengages downward from the guide ring groove.

[0030] 3. By setting a first limiting mechanism between the first core-pulling seat and the first core-pulling block, the cooperation between the first limiting groove and the first limiting post enables the first limiting groove to abut against the first limiting post at the end facing away from the core-pulling direction when the mold is opened, thereby driving the first core-pulling block to move synchronously with the first core-pulling seat in the core-pulling direction. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the automotive trim component in the embodiments of this application.

[0032] Figure 2 This is a cross-sectional schematic diagram of the automotive trim component in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram of the overall structure of the injection mold for automotive trim parts in the embodiments of this application.

[0034] Figure 4 This is a schematic diagram of the structure of the injection molding upper mold in the embodiments of this application.

[0035] Figure 5 This is a schematic diagram of the structure of the injection mold lower mold in the embodiments of this application.

[0036] Figure 6 This is a schematic diagram of the structure of the first core-pulling component in the embodiments of this application.

[0037] Figure 7 This is a cross-sectional schematic diagram of the fitting of the upper and lower molded parts in an embodiment of this application.

[0038] Figure 8 This is a cross-sectional schematic diagram of the cooperation between the first core-pulling post and the first core-pulling seat in an embodiment of this application.

[0039] Figure 9 This is a cross-sectional schematic diagram of the cooperation between the first core-pulling column and the limiting plate in an embodiment of this application.

[0040] Figure 10 This is a schematic diagram of the sliding fit between the first core-pulling block and the first core-pulling seat in an embodiment of this application.

[0041] Figure 11 This is a schematic diagram of the structure of the limiting column and the first core-pulling block in the embodiment of this application.

[0042] Figure 12 This is a cross-sectional schematic diagram of the first limiting post and the first limiting groove in an embodiment of this application.

[0043] Figure 13 This is a schematic diagram of the structure of the first driving mechanism in the embodiments of this application.

[0044] Figure 14 This is a schematic diagram of the structure of the drive cylinder and drive connecting rod in the embodiments of this application.

[0045] Figure 15 This is a schematic diagram of the structure of the second core-pulling component in the embodiments of this application.

[0046] Figure 16 This is a cross-sectional schematic diagram of the fit between the limiting rod and the drive through groove in an embodiment of this application.

[0047] Figure 17 This is a schematic diagram of the structure of the second core-pulling assembly and the metal insert in the embodiments of this application.

[0048] Explanation of reference numerals in the attached drawings: 1. Plastic base; 11. Mounting piece; 12. Notch; 2. Mounting socket; 3. Plastic conduit; 31. First conduit; 32. Second conduit; 321. First tube section; 322. Second tube section; 3211. Conduit annular groove; 4. Metal insert; 41. Pin section; 42. Internal part; 5. Injection mold lower mold; 51. Lower mold base; 511. First T-shaped slide; 512. Second T-shaped slide; 52. Lower mold core; 53. First core-pulling assembly; 531. First core-pulling base; 5311. First mounting groove; 53111. First inclined surface; 53112. Guide rail mounting groove; 53113. First spring mounting groove; 53114. First limiting groove; 5312. Molded insertion hole structure; 5313. 5314. Molding insert; 53141. Mounting groove; 53142. Sliding groove; 53143. Driving groove; 53144. Spring arrangement groove; 5315. Second spring; 5316. Limiting plate; 5317. First slide rail; 5318. First insert; 5319. First spring; 532. First core-pulling block; 5321. Molding lower part; 5322. First sliding groove; 5323. First arrangement groove; 5324. Vertical sliding groove; 5325. Guide sliding groove; 5326. Column mounting hole; 53261. First mounting hole; 53262. Second mounting hole; 533. First core-pulling column; 5331. Second main body; 53311. Relief groove; 5332. Second sliding part; 5333. Second molding part; 5334. 5335. Second drive plate; 5336. First abutment groove; 537. Limiting column; 534. Limiting protrusion; 535. First limiting post; 535. First limiting block; 536. First nut; 54. First drive mechanism; 541. First drive block; 5411. First sliding protrusion; 5412. First locking surface; 5413. Connecting rod mounting groove; 542. Drive connecting rod; 5421. Connecting rod base; 5422. Drive rod; 5423. Piston rod groove; 5424. Piston insertion hole; 543. Drive cylinder; 5431. Limiting plane; 5432. Drive head; 55. Second core-pulling assembly; 551. Second core-pulling seat; 5511. Second sliding protrusion; 5512. Second locking surface; 5513. Drive through groove 5514, Limiting groove; 55141, Second sliding groove; 55142, Second abutting groove; 5515, Limiting rod; 55151, Limiting body; 55152, Second limiting block; 55153, Elastic groove; 55154, Second limiting head; 55155, Guide slope; 55156, Abutting plane; 5516, Elastic element; 5517, Second mounting groove; 5518, Second protrusion; 552, Second core-pulling block; 5521, Second limiting groove; 5522, Pin seat; 5523, Mounting hole; 5524, Supporting protrusion; 6, Injection mold; 61, Upper mold base; 62, Upper mold core; 621, Molding upper part; 63, Drive slant rod; 631, Slant rod abutting surface; 64, Pressure plate;65. First locking module; 651. First locking template; 652. First abutment surface; 66. Second locking module; 661. Second locking template; 662. Second abutment surface; 7. Injection cavity. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-17 This application will be described in further detail.

[0050] This application discloses an injection mold for automotive trim parts. The aforementioned injection mold for automotive trim parts is used for injection molding of automotive trim parts. Related technical features of automotive trim parts in subsequent documents can be referred to. Figure 1 and Figure 2 Therefore, it will not be quoted separately in subsequent text. Figure 1 and Figure 2 .

[0051] Reference Figure 3 An injection mold for an automotive trim part includes a lower injection mold 5 and an upper injection mold 6 that moves vertically relative to the lower injection mold 5.

[0052] Reference Figure 4 and Figure 5 The upper injection mold 6 includes an upper mold base 61, an upper mold core 62 mounted on the upper mold base 61, and a drive slant rod 63 mounted on the upper mold base 61. The lower injection mold 5 includes a lower mold base 51, a lower mold core 52 mounted on the lower mold base 51, a first core-pulling assembly 53 mounted on the lower mold base 51 and corresponding to the two plastic conduits 3, a first drive mechanism 54 driving the first core-pulling assembly 53, and a second core-pulling assembly 55 mounted on the lower mold base 51 and corresponding to the mounting socket 2. The upper mold core 62, lower mold core 52, first core-pulling assembly 53, and second core-pulling assembly 55 constitute an injection cavity 7 for molding automotive trim parts when the mold is closed.

[0053] Reference Figure 5 and Figure 6 The first core-pulling assembly 53 includes a first core-pulling seat 531 slidably mounted on the lower mold base 51, a first core-pulling block 532 slidably mounted on the first core-pulling seat 531, and a first core-pulling column 533 slidably mounted on the first core-pulling seat 531 and used for forming the notch groove 12.

[0054] Reference Figure 6 and Figure 7The first core-pulling seat 531 also has a first mounting groove 5311 on the side opposite to the core-pulling direction for sliding installation of the first core-pulling block 532. The bottom of the first mounting groove 5311 has a first inclined surface 53111 that is inclined upward in the core-pulling direction, and the bottom of the first core-pulling block 532 is in contact with the first inclined surface 53111. In order to realize the molding of the plastic conduit 3, the first core-pulling seat 531 has a molding insertion hole structure 5312 for molding the second tube section 322. The molding insertion hole structure 5312 is also provided with a molding post 5313 for molding the inner wall of the plastic conduit 3. The molding post 5313 is coaxially arranged with the molding insertion hole structure 5312. The upper mold core 62 has a molding upper part 621 for molding the upper half of the first tube 321, and the first core-pulling block 532 has a molding lower part 5321 for molding the lower half of the first tube 321. The molding lower part 5321 is located below the molding insert 5313 and is directly opposite the molding insert 5313. When the injection mold of the automotive trim is closed, the molding upper part 621 and the molding lower part 5321 are closed.

[0055] Reference Figure 8 To achieve the forming of the notch 12 in the automotive trim, the first core-pulling seat 531 has a mounting groove 5314 that extends through the upper and lower surfaces and is used for the sliding installation of the first core-pulling post 533. The first core-pulling post 533 includes a second body 5331, a second sliding part 5332 located on the lower side of the second body 5331, a second forming part 5333 arranged at the bottom of the second sliding part 5332 and used for the core-pulling notch 12, and a second drive plate 5334 connected to the top of the second body 5331. The second body 5331, the second sliding part 5332, the second forming part 5333, and the second drive plate 5334 are integrally formed. The second body 5331 is directly opposite the forming post 5313, and the second body 5331 also has clearance grooves 53311 extending through both side walls, so that the first core-pulling post 533 will not interfere with the forming post 5313 when sliding up and down in the mounting groove 5314.

[0056] Reference Figure 8 and Figure 9The mounting groove 5314 includes a sliding groove 53141 for the second sliding part 5332 to slide up and down, and a driving groove 53142 for the second driving plate 5334 to slide up and down. To ensure that the second forming part 5333 can detach from the notch 12 after the automotive trim is formed, a second spring 5315 is also provided in the mounting groove 5314 to lift the first core-pulling post 533 upwards. The bottom surface of the driving groove 53142 also has a spring arrangement groove 53143 for arranging the second spring 5315. One end of the second spring 5315 abuts against the bottom of the spring arrangement groove 53143, and the other end abuts against the bottom of the second driving plate 5334, so that the first core-pulling post 533 always has an upward lifting tendency. To prevent the first core-pulling post 533 from detaching from the mounting groove 5314, the first core-pulling seat 531 is also provided with a limiting plate 5316 at the top of the mounting groove 5314, and the top of the first drive plate is also provided with a first abutting groove 5335 that cooperates with the first limiting plate 5316. When the first core-pulling post 533 is pushed upward and the bottom of the first abutting groove 5335 abuts against the bottom of the first limiting plate 5316, the second forming part 5333 has detached from the notch groove 12.

[0057] Reference Figure 10 and Figure 11 To ensure that the lower part 5321 can detach from the guide annular groove 3211 of the first tube 321 after the automotive trim part is formed, a guide rail mounting groove 53112 is provided at the bottom of the first mounting groove 5311. A first spring mounting groove 53113 is also provided on the side of the first mounting groove 5311 facing the core-pulling direction. A first slide rail 5317 for sliding the first core-pulling seat 531 is installed in the guide rail mounting groove 53112. A first insert 5318 is installed in the first spring mounting groove 53113. A first spring 5319 for driving the first core-pulling block 532 to move downward relative to the first core-pulling seat 531 is sleeved on the outside of the first insert 5318. A first sliding groove 5322 for sliding cooperation with the first slide rail 5317 is also provided at the bottom of the first core-pulling block 532. The first sliding groove 5322 is a through groove structure penetrating both sides of the first core-pulling block 532. The first core-pulling block 532 also has a first arrangement groove 5323 on the side facing the core-pulling direction for cooperating with the first spring 5319. During mold opening, the first spring 5319 and the first insert 5318 are inserted into the first arrangement groove 5323, and the first spring 5319 drives the first core-pulling block 532 to move downward relative to the first core-pulling seat 531, thereby causing the lower part 5321 to disengage from the guide ring groove 3211 of the first tube part 321.

[0058] Reference Figure 5 , Figure 10 and Figure 11To ensure that the first core-pulling block 532 can move downward relative to the first core-pulling seat 531 better when the first core-pulling seat 531 moves along the core-pulling direction, thus preventing damage to the guide annular groove 3211 when the lower molded part 5321 detaches from the guide annular groove 3211 of the first tube part 321, a limiting post 534 is also provided on one side of the first core-pulling seat 531. The limiting post 534 is fixed to the lower mold core 52 by bolts. A limiting protrusion 5341 is provided on the top of the limiting post 534 facing the first core-pulling seat 531. The limiting protrusion 5341 has a cuboid structure. A vertical slide groove 5324 for accommodating the limiting protrusion 5341 and a guide slide groove 5325 connecting the top of the vertical slide groove 5324 are provided on the top of the first core-pulling block 532 and the side directly opposite the limiting post 534. The guide slide groove 5325 extends towards the side opposite to the core-pulling direction.

[0059] Reference Figure 10 and Figure 11 When the first core-pulling seat 531 moves along the core-pulling direction, the end face of the limiting protrusion 5341 facing away from the core-pulling direction abuts against the end face of the vertical slide groove 5324 facing away from the core-pulling direction, causing the first core-pulling block 532 to move vertically downward under the drive of the limiting protrusion 5341, thereby causing the lower forming part 5321 to disengage vertically downward from the guide annular groove 3211 of the first tube part 321. After the lower forming part 5321 disengages from the guide annular groove 3211 of the first tube part 321, the limiting protrusion 5341 disengages from the vertical slide groove 5324 and aligns with the guide slide groove 5325.

[0060] Reference Figure 12 To limit the sliding range of the first core-pulling block 532 on the first core-pulling seat 531, a first limiting mechanism is also provided between the first core-pulling block 532 and the first core-pulling seat 531. The first limiting mechanism includes a first limiting groove 53114 formed at the bottom of the first mounting groove 5311 and a first limiting post 535 installed on the first core-pulling block 532 and cooperating with the first limiting groove 53114. The top of the first limiting post 535 also has a first limiting block 5351. The diameter of the first limiting block 5351 is larger than the diameter of the first limiting post 535, and the diameter of the first limiting post 535 is smaller than the width of the first limiting groove 53114. The first core-pulling block 532 has a column mounting hole 5326 extending through its upper and lower surfaces for mounting the first limiting post 535. The column mounting hole 5326 includes a first mounting hole 53261 for mounting the first limiting post 535 and a second mounting hole 53262 for mounting the first limiting block 5351. A first nut 536 for fixing the first limiting post 535 to the first mounting hole 53261 is threaded onto the top of the second mounting hole 53262. When the lower part 5321 is disengaged from the guide annular groove 3211 of the first tube part 321, the first limiting post 535 abuts against the first limiting groove 53114 at the end opposite to the core-pulling direction.

[0061] Reference Figure 4 and Figure 13 The first drive mechanism 54 includes a first drive block 541, a drive linkage 542 connected to the first drive block 541, and a drive cylinder 543 mounted on the lower mold base 51 for driving the first drive block 541. The first drive block 541 is slidably mounted on the lower mold base 51 along the core-pulling direction of the first core-pulling assembly 53. To improve the stability of the first drive block 541 sliding on the lower mold base 51, the lower mold base 51 has a first T-shaped slide groove 511 at one end along the core-pulling direction. The first drive block 541 has first sliding protrusions 5411 on both sides that slide in cooperation with the first T-shaped slide groove 511, so that the first drive block 541 can slide along the first T-shaped slide groove 511 during core pulling. The first drive block 541 has a first locking surface 5412 on the side facing away from the first core-pulling base 531, which abuts against the upper mold base 61 during mold closing. Both first core-pulling seats 531 are fixed to the side of the first drive block 541 facing away from the core-pulling direction by bolts. The first drive block 541 is also provided with a connecting rod mounting groove 5413 for mounting the drive connecting rod 542.

[0062] Reference Figure 13 and Figure 14 The drive link 542 has an overall L-shaped structure. The drive link 542 includes a link base 5421 fixedly installed in the link mounting groove 5413 and a drive rod 5422 vertically connected to the link base 5421 and connected to the drive cylinder 543. The drive rod 5422 has a piston rod groove 5423 that penetrates both side walls and is used for the piston rod of the drive cylinder 543 to be inserted. The bottom of the piston rod groove 5423 has a piston insertion hole 5424 that penetrates both sides of the drive rod 5422 along the core pulling direction.

[0063] Reference Figure 13 and Figure 14 The piston rod of the driving cylinder 543 has limiting planes 5431 on both the upper and lower sides. The limiting plane 5431 on the upper side is in contact with the inner top surface of the piston rod groove 5423, and the limiting plane 5431 on the lower side is in contact with the inner bottom surface of the piston rod groove 5423. The end of the piston rod of the driving cylinder 543 is provided with a driving head 5432 arranged in the piston insertion hole 5424 and used to fix the driving rod 5422 to the piston rod of the driving cylinder 543.

[0064] Reference Figure 4 and Figure 15The second core-pulling assembly 55 includes a second core-pulling seat 551 slidably mounted on the lower mold base 51 along the core-pulling direction and a second core-pulling block 552 detachably mounted on the second core-pulling seat 551. To improve the stability of the second core-pulling seat 551 sliding on the lower mold base 51, the lower mold base 51 is provided with a second T-shaped groove 512 along the core-pulling direction for arranging the second core-pulling seat 551. The second core-pulling seat 551 has second sliding protrusions 5511 on both sides that slide in conjunction with the second T-shaped groove 512, allowing the second core-pulling seat 551 to slide along the second T-shaped groove 512 during core pulling. The second core-pulling seat 551 has a second mounting groove 5517 at one end facing away from the core-pulling direction for arranging the second core-pulling block 552. The second mounting groove 5517 has two opposing second protrusions 5518 at both ends of its opening. The second core-pulling seat 551 has a second locking surface 5512 that is inclined downward on the side opposite to the second core-pulling seat 551 and abuts against the upper mold seat 61 when the mold is closed.

[0065] Reference Figure 15 and Figure 16 The bottom of the second core-pulling seat 551 is provided with a driving through groove 5513, which is a U-shaped groove structure that runs through the upper and lower surfaces and opens in the core-pulling direction. The inner wall of the driving through groove 5513 is symmetrically provided with limiting arrangement grooves 5514, within which a limiting rod 5515 and an elastic element 5516 are slidably installed. The limiting rod 5515 includes a limiting body 55151 and a second limiting block 55152 arranged at the bottom of the limiting body 55151. The limiting body 55151 has an elastic arrangement groove 55153 for inserting the elastic element 5516. The limiting arrangement groove 5514 includes a second sliding groove 55141 for sliding of the limiting body 55151 and a second abutment groove 55142 communicating with the second sliding groove 55141 and for arranging the second limiting block 55152. One end of the elastic element 5516 abuts against the bottom surface of the elastic arrangement groove 55153 and the other end abuts against the second core pull seat 551, so that the second limiting block 55152 always tends to abut against the side end face of the second abutment groove 55142 facing the drive through groove 5513. The limiting rod 5515 also has a second limiting head 55154 extending from the limiting arrangement groove 5514 to the drive through groove 5513. The second limiting head 55154 has a guide slope 55155 on the side facing the opening of the drive through groove 5513 and an abutment plane 55156 on the side facing away from the opening of the drive through groove 5513.

[0066] Reference Figure 15 and Figure 17The second core-pulling block 552 is detachably installed in the second mounting groove 5517. The second core-pulling block 552 also has a second limiting groove 5521 for engaging with the second protrusion 5518, so that when the second core-pulling seat 551 moves in the core-pulling direction, the second core-pulling seat 551 can drive the second core-pulling block 552 to move in the core-pulling direction. The end of the second core-pulling block 552 has a pin seat 5522. The pin seat 5522 has a mounting hole 5523 for mounting the pin part 41 of the metal rod 4 at one end facing away from the core-pulling direction. In this embodiment, there are four mounting holes 5523 arranged side by side along the width direction of the pin seat 5522. The second core-pulling block 552 is also provided with a support protrusion 5524 for supporting the built-in part 42 of the metal insert 4 on one end face opposite to the core-pulling direction. In this embodiment, there are three support protrusions 5524 and they are arranged side by side along the width direction of the second core-pulling block 552.

[0067] Reference Figure 4 and Figure 16 The injection mold 6 also includes a drive slant rod 63 mounted on the upper mold base 61 and arranged downwardly in the core-pulling direction towards the second core-pulling assembly 55, and a clamping plate 64 for locking the second core-pulling block 552 in the second mounting groove 5517. The drive slant rod 63 has a slant rod abutment surface 631 on the side facing the core-pulling direction. During mold opening, the slant rod abutment surface 631 abuts against the abutment plane 55156 of the second limiting head 55154. When the upper mold base 61 moves upward, the drive slant rod 63 can drive the second core-pulling block 551 to move in the core-pulling direction. When the mold is closed, the upper mold base 61 moves downward, and one end of the drive bar 63 facing away from the bar abutment surface 631 abuts against the guide slope 55155 of the second limiting head 55154, so that the limiting bar 5515 slides into the limiting arrangement groove 5514, thereby allowing the drive bar 63 to slide past the second limiting head 55154 and move towards the bottom of the drive through groove 5513.

[0068] Reference Figure 4 and Figure 5The upper mold base 61 is also provided with a first locking module 65 for abutting and cooperating with the first driving block 541 and a second locking module 66 for abutting and cooperating with the second core-pulling base 551. The first locking module 65 has a first locking mold structure that cooperates with the first locking mold surface 5412, and the second locking module 66 has a second locking mold structure that cooperates with the second locking mold surface 5512. The first locking mold structure includes a first locking template 651 installed on the first locking module 65 and a first abutting surface 652 arranged on the first locking template 651 and inclined downward toward the core-pulling direction of the first core-pulling assembly 53; the second locking mold structure includes a second locking template 661 installed on the second locking module 66 and a second abutting surface 662 arranged on the second locking template 661 and inclined downward toward the core-pulling direction of the second core-pulling assembly 55. When the injection mold of the automotive trim part is closed, the first locking mold surface 5412 abuts with the first abutting surface 652, and the second locking mold surface 5512 abuts with the second abutting surface 662.

[0069] Reference Figures 1 to 17 The implementation principle of an injection mold for automotive trim parts according to an embodiment of this application is as follows: When the injection mold for automotive trim parts is closed, the upper injection mold 6 moves downward relative to the lower injection mold 5, and the upper forming part 621 of the upper mold base 61 and the lower forming part 5321 of the first core-pulling block 532 close together. After injection molding is completed and when the mold is opened, the upper injection mold 6 moves upward relative to the lower injection mold 5, and the driving cylinder 543 drives the first core-pulling seat 531 to move toward the core-pulling direction of the first core-pulling assembly 53. Under the action of the first spring 5319 and the limiting column 534, the lower forming part 5321 moves downward and disengages from the guide ring groove 3211; then, under the action of the first limiting mechanism, the first core-pulling block 532 and the first core-pulling seat 531 move synchronously toward the core-pulling direction; the driving rod 63 drives the second core-pulling seat 551 to move toward the core-pulling direction of the second core-pulling assembly 55, so that the pin part 41 disengages from the mounting hole 5523.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold for automotive trim parts, comprising a lower injection mold (5) and an upper injection mold (6); the upper injection mold (6) comprising an upper mold base (61) and an upper mold core (62) mounted on the upper mold base (61); the lower injection mold (5) comprising a lower mold base (51) and a lower mold core (52) mounted on the lower mold base (51); characterized in that, The injection mold lower mold (5) further includes a first core-pulling assembly (53) installed on the lower mold base (51) and corresponding one-to-one with the two plastic conduits (3), a second core-pulling assembly (55) installed on the lower mold base (51) and corresponding to the mounting socket (2), and a first drive mechanism (54) for driving the first core-pulling assembly (53); the upper mold core (62), the lower mold core (52), the first core-pulling assembly (53), and the second core-pulling assembly (55) together form an injection cavity (7) for molding automotive trim parts when the mold is closed; The first core-pulling assembly (53) includes a first core-pulling seat (531), a first core-pulling block (532) obliquely slidably mounted on the first core-pulling seat (531), and a first core-pulling post (533) vertically slidably mounted on the first core-pulling seat (531) for forming a notch (12); the first core-pulling seat (531) has a forming insertion hole structure (5312) for forming a second tube section (322); the upper mold core (62) has a forming upper part (621) for forming a first tube section (321); the first core-pulling block (532) The device includes a lower forming portion (5321) for forming a first tube portion (321) and cooperating with the upper forming portion (621); the first core-pulling seat (531) has a first slide rail (5317) arranged obliquely upward along the core-pulling direction, and the first core-pulling block (532) has a first groove (5322) cooperating with the first slide rail (5317); the first core-pulling seat (531) is provided with a first spring (5319), which drives the first core-pulling block (532) to always be aligned with the first slide rail (5317). The downward sliding trend; a first limiting mechanism is also provided between the first core-pulling seat (531) and the first core-pulling block (532) to limit the sliding range of the first core-pulling block (532); the top of the first core-pulling column (533) abuts against the upper injection mold (6), and the first core-pulling seat (531) is provided with a second spring (5315) to drive the first core-pulling column (533) to be lifted up. When the injection mold of the automotive trim is opened, the second spring (5315) drives the first core-pulling column (533) to disengage from the notch groove (12).

2. The injection mold for an automotive trim part according to claim 1, characterized in that, The lower mold core (52) is provided with a limiting post (534) on one side of the first core-pulling seat (531). The limiting post (534) is provided with a limiting protrusion (5341) on the side facing the first core-pulling seat (531). The first core-pulling block (532) has a vertical slide groove (5324) for arranging the limiting protrusion (5341) and a guide slide groove (5325) communicating with the top of the vertical slide groove (5324). The guide slide groove (5325) is located on the side of the vertical slide groove (5324) facing away from the core-pulling direction. When the lower molded part (5321) is disengaged from the first tube part (321), the limiting protrusion (5341) is disengaged from the vertical slide groove (5324) and is directly opposite the guide slide groove (5325).

3. The injection mold for an automotive trim part according to claim 1, characterized in that, The first limiting mechanism includes a first limiting groove (53114) formed in the first core-pulling seat (531) and parallel to the first slide rail (5317) and a first limiting post (535) arranged in the first core-pulling block (532) and cooperating with the first limiting groove (53114).

4. The injection mold for an automotive trim part according to claim 1, characterized in that, The first core-pulling block (532) has a first arrangement groove (5323) for arranging the first spring (5319). The first arrangement groove (5323) is parallel to the first slide rail (5317). The first core-pulling seat (531) is equipped with a first insert (5318) that is inserted into the first arrangement groove (5323) and is used for the first spring (5319) to be sleeved.

5. The injection mold for an automotive trim part according to claim 1, characterized in that, The first core-pulling post (533) includes a second body (5331), a second sliding part (5332), a second forming part (5333) disposed at the bottom of the second sliding part (5332) and used for forming a notch (12), and a second drive plate (5334) connected to the top of the second body (5331); the first core-pulling seat (531) has a mounting groove (5314) for arranging the first core-pulling post (533), the mounting groove (5314) 4) Includes a sliding groove (53141) for sliding the second sliding part (5332) up and down and a driving groove (53142) for sliding the second driving plate (5334) up and down; the bottom surface of the driving groove (53142) is provided with a spring arrangement groove (53143) for arranging the second spring (5315); the top of the first core-pulling seat (531) is equipped with a limiting plate (5316) for restricting the first core-pulling column (533) from disengaging.

6. The injection mold for an automotive trim part according to claim 1, characterized in that, The first drive mechanism (54) includes a first drive block (541) slidably mounted on the lower mold base (51) along the core-pulling direction of the first core-pulling assembly (53), a drive connecting rod (542) connected to the first drive block (541), and a drive cylinder (543) mounted on the lower mold base (51) and used to drive the first drive block (541) to move; the drive connecting rod (542) has a piston rod groove (5423) for the piston rod of the drive cylinder (543) to be inserted; both first core-pulling seats (531) are fixedly mounted on the first drive block (541).

7. The injection mold for an automotive trim part according to claim 6, characterized in that, The piston rod of the drive cylinder (543) is provided with limiting planes (5431) on both the upper and lower sides; the limiting plane (5431) on the upper side is in contact with the inner top surface of the piston rod groove (5423), and the limiting plane (5431) on the lower side is in contact with the inner bottom surface of the piston rod groove (5423).

8. The injection mold for an automotive trim part according to claim 6, characterized in that, The first drive block (541) has a first locking surface (5412) on the side opposite to the first core-pulling seat (531); the upper mold seat (61) is provided with a first locking module (65), and the first locking module (65) has a first locking structure that cooperates with the first locking surface (5412).

9. The injection mold for an automotive trim part according to claim 1, characterized in that, The second core-pulling assembly (55) includes a second core-pulling seat (551) that is slidably mounted along the core-pulling direction and a second core-pulling block (552) mounted on the second core-pulling seat (551); the end of the second core-pulling block (552) is provided with a mounting hole (5523) for mounting the pin portion (41) of the metal insert (4); the second core-pulling block (552) is also provided with a support protrusion (5524) for supporting the built-in portion (42) of the metal insert (4).

10. The injection mold for an automotive trim part according to claim 9, characterized in that, The upper mold base (61) is equipped with a drive slant rod (63) for driving the second core-pulling base (551) to move when the mold is opened; the second core-pulling base (551) is provided with a drive through groove (5513) for the drive slant rod (63) to be arranged; the inner wall of the drive through groove (5513) is provided with a limit arrangement groove (5514), a limit rod (5515) slidably installed in the limit arrangement groove (5514), and an elastic element (5516) installed in the limit arrangement groove (5514) for driving the limit rod (5515) to always extend out of the limit arrangement groove (5514); the limit rod (5515) is provided with a guide slope (55155) on the side facing the opening of the drive through groove (5513) and an abutment plane (55156) on the side facing away from the opening of the drive through groove (5513).

Images