A straight top mold for bumper

Abstract

The present invention proposes a straight top mold for a bumper, the straight top mold for the bumper comprising: a base; a rear mold core, the rear mold core is arranged on the base; a large straight top, a core-pulling tunnel is arranged in the main body of the large straight top, the large straight top is arranged on the base and is slidably connected with the rear mold core; a core-pulling piece, the core-pulling piece is installed in the core-pulling tunnel; a front mold, the front mold and the core-pulling piece form a cavity for the undercut of the injection-molded bumper. The present invention makes it unnecessary to inject the undercut on the bumper by the inclined top, gets rid of the dependence on the inclined top connecting rod, and does not cause the interference between the undercut and the inclined top seat when the inclined top is demolded, so the inclined top can be demolded smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of mold equipment, in particular to a straight top mold for a bumper. Background Art

[0002] Bumpers are installed at the front and rear ends of cars. They not only have decorative functions, but more importantly, they are safety devices that absorb and mitigate external impact forces and protect the body and occupants. Therefore, different shapes of car bumpers require different injection mold structures. There is an undercut on the inner side of the bumper, which is an assembly structure on the bumper. In the prior art, the undercut is injection molded by a large slant top. Since the large slant top needs to rely on the slant top connecting rod to demold, one end of the slant top connecting rod is connected to the large slant top and the other end is connected to the ejector plate. When the large slant top is demolded, the undercut is easy to interfere with the slant top seat, which is not conducive to smooth demolding. Summary of the invention

[0003] The main purpose of the present invention is to provide a straight top mold for a bumper, aiming to solve the problem that when there is an undercut on the inner side surface of the bumper, it is not conducive to smooth demoulding of the large inclined top.

[0004] In order to achieve the above object, the present invention provides a straight top mold for a bumper, and the straight top mold for the bumper comprises:

[0005] Pedestal;

[0006] a rear mold core, the rear mold core being arranged on the base;

[0007] A large straight top, wherein a core-pulling tunnel is provided in the main body of the large straight top, the large straight top is arranged on the base and is slidably connected to the rear mold core;

[0008] A core-pulling member, wherein the core-pulling member is installed in the core-pulling tunnel;

[0009] A front mold, wherein the front mold and the core-pulling member form an undercut cavity for injection molding the bumper.

[0010] Optionally, a sliding structure is connected between the core pulling part and the rear mold core, and the sliding structure includes a straight top guide rail and a straight top slide block. The straight top guide rail is fixed on the rear mold core, and the core pulling part is fixed on the straight top slide block. The straight top guide rail and the straight top slide block cooperate with each other to form a sliding connection.

[0011] Optionally, a T-shaped guide groove is provided on the straight top guide rail, and a mounting hole is provided on the bottom of the T-shaped guide groove for fixing the straight top guide rail on the rear mold core.

[0012] Optionally, the straight-top slider is provided with a fixing hole and two guide grooves, the fixing hole is located on the side of the straight-top slider facing away from the straight-top guide rail, and the two guide grooves are respectively located on two opposite side surfaces of the straight-top slider, and the two side surfaces are adjacent to the side surface provided with the fixing hole.

[0013] Optionally, the straight top mold of the bumper also includes a fixing block, which is located between the rear mold core and the large straight top, and the fixing block is fixed on the large straight top and includes a protrusion protruding from the large straight top, and the protrusion is embedded in the rear mold core.

[0014] Optionally, the straight top mold of the bumper further includes a straight top connecting rod, one end of which is connected to the base, and the other end of which is connected to the large straight top.

[0015] Optionally, a connecting rod sleeve is provided on the straight top connecting rod.

[0016] Optionally, a wear-resistant block is sleeved on the straight top connecting rod.

[0017] Optionally, the base includes a substrate and an ejector base plate, the ejector base plate is mounted on the substrate, one end of the straight ejector link is connected to the ejector base plate, and the other end is connected to the large straight ejector.

[0018] Optionally, the base also includes a ejector panel, a mounting plate and a support plate, the ejector panel is arranged on the ejector base plate, the support plate is arranged on the substrate, and the support plate encloses the ejector base plate and the ejector panel, the mounting plate is arranged on the support plate, and the large straight ejector is installed on the support plate.

[0019] The technical solution of the present invention is to arrange a rear mold core and a large straight top on a base, and a sliding connection is formed between the rear mold core and the large straight top. A core pulling tunnel and a core pulling part are arranged in the main body of the large straight top. The core pulling part is installed in the core pulling tunnel. The front mold and the core pulling part form an undercut cavity for injection molding the bumper, so that the undercut on the bumper does not need to be injection molded by the inclined top, and gets rid of the dependence on the inclined top connecting rod. When the inclined top is demolded, there will be no interference between the undercut and the inclined top seat, and the inclined top can be demolded smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1It is a structural schematic diagram of an embodiment of a straight top mold of a bumper of the present invention;

[0022] Figure 2 It is a schematic diagram of the installation structure of the large straight top in the straight top mold of the bumper of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the sliding structure in the straight top mold of the bumper of the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 121 Connecting rod sleeve 325 Screws 30 Big straight top 40 substrate 31 Straight top link 41 Support plate 311 Wear Blocks 42 Ejector base plate 321 Straight top rail 43 Ejector panel 322 Straight top slider 44 Mounting Plate 323 Core pulling parts 50 bumper 324 T-shaped guide groove 60 Back mold core

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0030] like Figure 1-3 As shown, the present invention proposes a straight top mold for a bumper, and the straight top mold for the bumper includes: a base; a rear mold core 60, and the rear mold core 60 is arranged on the base; a large straight top 30, and a core pulling tunnel is provided in the main body of the large straight top 30, and the large straight top 30 is arranged on the base and is slidably connected with the rear mold core 60; a core pulling member 323, and the core pulling member 323 is installed in the core pulling tunnel (not shown in the figure); a front mold (not shown in the figure), and the front mold and the core pulling member 323 form an undercut cavity for the injection molding of the bumper 50.

[0031] In this embodiment, the large straight top 30 and the rear mold core 60 are both arranged on the base, and a sliding connection is formed between the large straight top 30 and the rear mold core 60 to ensure that the large straight top 30 can be smoothly demolded from the rear mold core 60. A core-pulling tunnel is provided in the main body of the large straight top 30, and the core-pulling tunnel runs through the main body of the large straight top 30. One of the exits of the tunnel is located on the surface where the large straight top 30 abuts against the rear mold core 60, and the other exit is located on the surface where the large straight top 30 abuts against the bumper 50. The core-pulling piece 323 is located in the core-pulling tunnel and passes through the two exits of the core-pulling tunnel, wherein the end abuts against the bumper 50. The end surface of the core-pulling piece 323 smoothly transitions with the surface of the large straight top 30 to make the inner surface of the bumper 50 smooth.

[0032] In a specific implementation, at one end close to the front mold, the core pulling piece 323 and the front mold form an undercut cavity for the injection molded bumper 50, and the undercut is located on the inner side of the bumper 50. After the injection molding material is injected into the core in liquid form, the undercut is formed in the cavity formed by the core pulling piece 323 and the front mold.

[0033] like Figure 3 As shown, the core puller 323 is a columnar structure, which can be pulled out from the core puller tunnel. When the large straight top 30 is demolded, the core puller 323 can first pull out the large straight top 30, and then demold the large straight top 30; or, the core puller 323 can also be separated from the bumper 50 together with the large straight top 30. Therefore, the undercut on the bumper 50 does not need to be injection molded by the inclined top, and the dependence on the inclined top connecting rod is eliminated. When the inclined top is demolded, the undercut will not interfere with the inclined top seat, and the inclined top can be demolded smoothly.

[0034] Furthermore, a sliding structure is connected between the core pulling member 323 and the rear mold core 60, and the sliding structure includes a straight top guide rail 321 and a straight top slide block 322. The straight top guide rail 321 is fixed on the rear mold core 60, and the core pulling member 323 is fixed on the straight top slide block 322. The straight top guide rail 321 and the straight top slide block 322 cooperate with each other to form a sliding connection.

[0035] The sliding structure is located between the core puller 323 and the rear mold core 60, so that the core puller 323 forms a sliding connection with the rear mold core 60. The sliding structure is formed by a straight top guide rail 321 and a straight top slider 322, wherein the straight top guide rail 321 is fixed on the rear mold core 60, and the straight top slider 322 is fixedly connected to the core puller 323. When the large straight top 30 is demolded, the core puller 323 can slide out quickly from the rear mold core 60.

[0036] At the same time, a sliding structure is also connected between the large straight top 30 and the rear mold core 60 to form a sliding connection, which is convenient for the installation and demoulding of the large straight top 30.

[0037] It can be understood that the sliding connection between the core pulling part 323 and the rear mold core 60 is not limited to the form of mutual cooperation between the above-mentioned straight top guide rail 321 and the straight top slider 322. For example, the guide rail structure and the gear rack structure formed by the guide rail and the guide rail bar can also realize the sliding connection between the core pulling part 323 and the rear mold core 60.

[0038] Specifically, a T-shaped guide groove 324 is formed on the straight top guide rail 321 , and a mounting hole is formed on the bottom of the T-shaped guide groove 324 for fixing the straight top guide rail 321 on the rear mold core 60 .

[0039] The bottom width of the T-shaped guide groove 324 is greater than the slot width. The straight top slider 322 can only slide into the T-shaped guide groove 324 from both ends of the T-shaped guide groove 324. The narrow slot restricts the straight top slider 322 from escaping from the T-shaped guide groove 324 in a direction perpendicular to the bottom of the groove, thereby ensuring the reliability of the connection between the core puller 323 and the rear mold core 60.

[0040] A mounting hole (not shown) is provided on the bottom of the T-shaped guide groove 324 , and a screw 325 is inserted into the mounting hole to fix the straight top guide rail 321 on the rear mold core 60 .

[0041] The straight top slider 322 is provided with a fixing hole (not marked in the figure) and two guide grooves (not marked in the figure), the fixing hole is located on the side of the straight top slider 322 away from the straight top guide rail 321, and the two guide grooves are respectively located on two opposite side surfaces of the straight top slider 322, and the two side surfaces are adjacent to the side surface provided with the fixing hole.

[0042] In this embodiment, the fixing hole is a blind hole for installing the core puller 323. One end of the core puller 323 is installed in the fixing hole and is fixedly connected to the straight top slider 322 by a screw 325. The other end passes through the large straight top 30 from the tunnel and smoothly transitions with the surface of the large straight top 30. In order to ensure the reliability of the connection between the straight top slider 322 and the straight top guide rail 321, two guide grooves are provided on the straight top slider 322. The two guide grooves are respectively located on the two opposite side surfaces of the straight top slider 322, and the two side surfaces are adjacent to the side surface with the fixing hole. The two guide grooves cooperate with the straight top guide rail 321 to form a sliding connection.

[0043] Optionally, the straight top mold of the bumper also includes a fixing block (not shown in the figure), which is located between the rear mold core 60 and the large straight top 30, and the fixing block is fixed on the large straight top 30 and includes a protrusion protruding from the large straight top 30, and the protrusion is embedded in the rear mold core 60.

[0044] The fixing block is located at one end of the large straight top 30 away from the base, and the fixing block is between the large straight top 30 and the rear mold core 60. The fixing block has a part fixed on the large straight top 30 and a part protruding from the large straight top 30, wherein the part protruding from the large straight top 30 is a protruding portion, and the rear mold core 60 is provided with a groove (not marked in the figure) at a position corresponding to the fixing block, and the protruding portion is embedded in the groove to fix the straight top block and prevent the large top block from moving when subjected to large injection pressure.

[0045] As an embodiment, the straight top mold of the bumper further includes a straight top connecting rod 31 , one end of the straight top connecting rod 31 is connected to the base, and the other end is connected to the large straight top 30 .

[0046] When the large straight top 30 is demoulded, the straight top connecting rod 31 plays a pushing role, so that the large straight top 30 moves in a predetermined demoulding direction. Here, the predetermined demoulding direction can be the vertical direction of the base or a direction forming a certain angle with the vertical direction of the base, depending on the specific structure of the product.

[0047] One end of the straight top connecting rod 31 is connected to the base, and the other end is connected to the large straight top 30 . The straight top connecting rod 31 bears the weight of the large straight top 30 and plays a supporting role for the large straight top 30 .

[0048] In one embodiment, a connecting rod sleeve 121 is sleeved on the straight top connecting rod 31 ; or, a wear-resistant block 31 is sleeved on the straight top connecting rod 31 .

[0049] In a specific implementation, the base includes a substrate 40, an ejector bottom plate 42, an ejector panel 43, a mounting plate 44 and a support plate 41. One end of the straight top connecting rod 31 is connected to the ejector bottom plate 42, and the other end is connected to the large straight top 30. The mounting plate 44 is located between the ejector bottom plate 42 and the large straight top 30. Therefore, the straight top connecting rod 31 passes through the middle of the mounting plate 44. Since the large straight top 30 is heavy, there is a large friction between the straight top connecting rod 31 and the mounting plate 44 when the large straight top 30 is demolded. In order to prevent wear, a connecting rod sleeve 121 or a wear-resistant block 31 is sleeved on the straight top connecting rod 31 to protect the straight top connecting rod 31.

[0050] Optionally, the base includes a substrate 40 and an ejector base plate 42 , the ejector base plate 42 is mounted on the substrate 40 , one end of the straight ejector link 31 is connected to the ejector base plate 42 , and the other end is connected to the large straight ejector 30 .

[0051] The base plate 40 is a mounting platform for other devices on the straight top mold of the bumper. The ejector base plate 42 is arranged on the base plate 40 to support the straight top link 31 .

[0052] Furthermore, the base also includes an ejector panel 43, a mounting plate 44 and a support plate 41, the ejector panel 43 is arranged on the ejector bottom plate 42, the support plate 41 is arranged on the substrate 40, and the support plate 41 surrounds the ejector bottom plate 42 and the ejector panel 43, the mounting plate 44 is arranged on the support plate 41, and the large straight ejector 30 is installed on the support plate 41.

[0053] The support plate 41 is also called a C plate. The support plate 41 is disposed on the base plate 40 to enclose the ejector bottom plate 42 and the ejector panel 43. The support plate 41 is used to support the mounting plate 44 and bear the weight on the mounting plate 44.

[0054] The mounting plate 44 is also called the B plate, and the rear mold core 60 and the large straight top 30 are both mounted on the mounting plate 44 .

[0055] like Figure 1-3 As shown, the present invention proposes a straight top mold for a bumper, and the straight top mold for the bumper includes: a base; a rear mold core 60, and the rear mold core 60 is arranged on the base; a large straight top 30, and a core pulling tunnel is provided in the main body of the large straight top 30, and the large straight top 30 is arranged on the base and is slidably connected with the rear mold core 60; a core pulling member 323, and the core pulling member 323 is installed in the core pulling tunnel (not shown in the figure); a front mold (not shown in the figure), and the front mold and the core pulling member 323 form an undercut cavity for the injection molding of the bumper 50.

[0056] In this embodiment, the large straight top 30 and the rear mold core 60 are both arranged on the base, and a sliding connection is formed between the large straight top 30 and the rear mold core 60 to ensure that the large straight top 30 can be smoothly demolded from the rear mold core 60. A core-pulling tunnel is provided in the main body of the large straight top 30, and the core-pulling tunnel runs through the main body of the large straight top 30. One of the exits of the tunnel is located on the surface where the large straight top 30 abuts against the rear mold core 60, and the other exit is located on the surface where the large straight top 30 abuts against the bumper 50. The core-pulling piece 323 is located in the core-pulling tunnel and passes through the two exits of the core-pulling tunnel, wherein the end abuts against the bumper 50. The end surface of the core-pulling piece 323 smoothly transitions with the surface of the large straight top 30 to make the inner surface of the bumper 50 smooth.

[0057] In a specific implementation, at one end close to the front mold, the core pulling piece 323 and the front mold form an undercut cavity for the injection molded bumper 50, and the undercut is located on the inner side of the bumper 50. After the injection molding material is injected into the core in liquid form, the undercut is formed in the cavity formed by the core pulling piece 323 and the front mold.

[0058] like Figure 3As shown, the core puller 323 is a columnar structure, which can be pulled out from the core puller tunnel. When the large straight top 30 is demolded, the core puller 323 can first pull out the large straight top 30, and then demold the large straight top 30; or, the core puller 323 can also be separated from the bumper 50 together with the large straight top 30. Therefore, the undercut on the bumper 50 does not need to be injection molded by the inclined top, and the dependence on the inclined top connecting rod is eliminated. When the inclined top is demolded, the undercut will not interfere with the inclined top seat, and the inclined top can be demolded smoothly.

[0059] Furthermore, a sliding structure is connected between the core pulling member 323 and the rear mold core 60, and the sliding structure includes a straight top guide rail 321 and a straight top slide block 322. The straight top guide rail 321 is fixed on the rear mold core 60, and the core pulling member 323 is fixed on the straight top slide block 322. The straight top guide rail 321 and the straight top slide block 322 cooperate with each other to form a sliding connection.

[0060] The sliding structure is located between the core puller 323 and the rear mold core 60, so that the core puller 323 forms a sliding connection with the rear mold core 60. The sliding structure is formed by a straight top guide rail 321 and a straight top slider 322, wherein the straight top guide rail 321 is fixed on the rear mold core 60, and the straight top slider 322 is fixedly connected to the core puller 323. When the large straight top 30 is demolded, the core puller 323 can slide out quickly from the rear mold core 60.

[0061] At the same time, a sliding structure is also connected between the large straight top 30 and the rear mold core 60 to form a sliding connection, which is convenient for the installation and demoulding of the large straight top 30.

[0062] It can be understood that the sliding connection between the core pulling part 323 and the rear mold core 60 is not limited to the form of mutual cooperation between the above-mentioned straight top guide rail 321 and the straight top slider 322. For example, the guide rail structure and the gear rack structure formed by the guide rail and the guide rail bar can also realize the sliding connection between the core pulling part 323 and the rear mold core 60.

[0063] Specifically, a T-shaped guide groove 324 is formed on the straight top guide rail 321 , and a mounting hole is formed on the bottom of the T-shaped guide groove 324 for fixing the straight top guide rail 321 on the rear mold core 60 .

[0064] The bottom width of the T-shaped guide groove 324 is greater than the slot width. The straight top slider 322 can only slide into the T-shaped guide groove 324 from both ends of the T-shaped guide groove 324. The narrow slot restricts the straight top slider 322 from escaping from the T-shaped guide groove 324 in a direction perpendicular to the bottom of the groove, thereby ensuring the reliability of the connection between the core puller 323 and the rear mold core 60.

[0065] A mounting hole (not shown) is provided on the bottom of the T-shaped guide groove 324 , and a screw 325 is inserted into the mounting hole to fix the straight top guide rail 321 on the rear mold core 60 .

[0066] The straight top slider 322 is provided with a fixing hole (not marked in the figure) and two guide grooves (not marked in the figure), the fixing hole is located on the side of the straight top slider 322 away from the straight top guide rail 321, and the two guide grooves are respectively located on two opposite side surfaces of the straight top slider 322, and the two side surfaces are adjacent to the side surface provided with the fixing hole.

[0067] In this embodiment, the fixing hole is a blind hole for installing the core puller 323. One end of the core puller 323 is installed in the fixing hole and is fixedly connected to the straight top slider 322 by a screw 325. The other end passes through the large straight top 30 from the tunnel and smoothly transitions with the surface of the large straight top 30. In order to ensure the reliability of the connection between the straight top slider 322 and the straight top guide rail 321, two guide grooves are provided on the straight top slider 322. The two guide grooves are respectively located on the two opposite side surfaces of the straight top slider 322, and the two side surfaces are adjacent to the side surface with the fixing hole. The two guide grooves cooperate with the straight top guide rail 321 to form a sliding connection.

[0068] Optionally, the straight top mold of the bumper also includes a fixing block (not shown in the figure), which is located between the rear mold core 60 and the large straight top 30, and the fixing block is fixed on the large straight top 30 and includes a protrusion protruding from the large straight top 30, and the protrusion is embedded in the rear mold core 60.

[0069] The fixing block is located at one end of the large straight top 30 away from the base, and the fixing block is between the large straight top 30 and the rear mold core 60. The fixing block has a part fixed on the large straight top 30 and a part protruding from the large straight top 30, wherein the part protruding from the large straight top 30 is a protruding portion, and the rear mold core 60 is provided with a groove (not marked in the figure) at a position corresponding to the fixing block, and the protruding portion is embedded in the groove to fix the straight top block and prevent the large top block from moving when subjected to large injection pressure.

[0070] As an embodiment, the straight top mold of the bumper further includes a straight top connecting rod 31 , one end of the straight top connecting rod 31 is connected to the base, and the other end is connected to the large straight top 30 .

[0071] When the large straight top 30 is demoulded, the straight top connecting rod 31 plays a pushing role, so that the large straight top 30 moves in a predetermined demoulding direction. Here, the predetermined demoulding direction can be the vertical direction of the base or a direction forming a certain angle with the vertical direction of the base, depending on the specific structure of the product.

[0072] One end of the straight top connecting rod 31 is connected to the base, and the other end is connected to the large straight top 30 . The straight top connecting rod 31 bears the weight of the large straight top 30 and plays a supporting role for the large straight top 30 .

[0073] In one embodiment, a connecting rod sleeve 121 is sleeved on the straight top connecting rod 31 ; or, a wear-resistant block 31 is sleeved on the straight top connecting rod 31 .

[0074] In a specific implementation, the base includes a substrate 40, an ejector bottom plate 42, an ejector panel 43, a mounting plate 44 and a support plate 41. One end of the straight top connecting rod 31 is connected to the ejector bottom plate 42, and the other end is connected to the large straight top 30. The mounting plate 44 is located between the ejector bottom plate 42 and the large straight top 30. Therefore, the straight top connecting rod 31 passes through the middle of the mounting plate 44. Since the large straight top 30 is heavy, there is a large friction between the straight top connecting rod 31 and the mounting plate 44 when the large straight top 30 is demolded. In order to prevent wear, a connecting rod sleeve 121 or a wear-resistant block 31 is sleeved on the straight top connecting rod 31 to protect the straight top connecting rod 31.

[0075] Optionally, the base includes a substrate 40 and an ejector base plate 42 , the ejector base plate 42 is mounted on the substrate 40 , one end of the straight ejector link 31 is connected to the ejector base plate 42 , and the other end is connected to the large straight ejector 30 .

[0076] The base plate 40 is a mounting platform for other devices on the straight top mold of the bumper. The ejector base plate 42 is arranged on the base plate 40 to support the straight top link 31 .

[0077] Furthermore, the base also includes an ejector panel 43, a mounting plate 44 and a support plate 41, the ejector panel 43 is arranged on the ejector bottom plate 42, the support plate 41 is arranged on the substrate 40, and the support plate 41 surrounds the ejector bottom plate 42 and the ejector panel 43, the mounting plate 44 is arranged on the support plate 41, and the large straight ejector 30 is installed on the support plate 41.

[0078] The support plate 41 is also called a C plate. The support plate 41 is disposed on the base plate 40 to enclose the ejector bottom plate 42 and the ejector panel 43. The support plate 41 is used to support the mounting plate 44 and bear the weight on the mounting plate 44.

[0079] The mounting plate 44 is also called the B plate, and the rear mold core 60 and the large straight top 30 are both mounted on the mounting plate 44 .

[0080] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A straight top mold for a bumper, characterized in that: The straight top mold of the bumper includes: Pedestal; a rear mold core, the rear mold core being arranged on the base; A large straight top, wherein a core-pulling tunnel is provided in the main body of the large straight top, the large straight top is arranged on the base and is slidably connected to the rear mold core; A core-pulling member, wherein the core-pulling member is installed in the core-pulling tunnel; A front mold, wherein the front mold and the core-pulling member form an undercut cavity for injection-molding the bumper; A sliding structure is connected between the core pulling member and the rear mold core, and the sliding structure includes a straight top guide rail and a straight top slider. The straight top guide rail is fixed on the rear mold core, and the core pulling member is fixed on the straight top slider. The straight top guide rail and the straight top slider cooperate with each other to form a sliding connection; A T-shaped guide groove is provided on the straight top guide rail, and a mounting hole is provided on the bottom of the T-shaped guide groove for fixing the straight top guide rail on the rear mold core; The straight top slider is provided with a fixing hole and two guide grooves, the fixing hole is located on the side of the straight top slider away from the straight top guide rail, and the two guide grooves are respectively located on two opposite side surfaces of the straight top slider, and the two side surfaces are adjacent to the side surface provided with the fixing hole; The straight top mold of the bumper also includes a straight top connecting rod, one end of which is connected to the base, and the other end of which is connected to the large straight top; The upper sleeve of the straight top connecting rod is provided with a connecting rod sleeve and a wear-resistant block; The straight top mold of the bumper also includes a fixing block, which is located between the rear mold core and the large straight top. The fixing block is fixed on the large straight top and includes a protrusion protruding from the large straight top. The rear mold core correspondingly opens a groove, and the protrusion is embedded in the groove.

2. The straight top mold of the bumper according to claim 1, characterized in that: The base comprises a base plate and an ejector base plate, wherein the ejector base plate is mounted on the base plate, one end of the straight ejector link is connected to the ejector base plate, and the other end is connected to the large straight ejector.

3. The straight top mold of the bumper according to claim 2, characterized in that: The base also includes an ejector panel, a mounting plate and a support plate. The ejector panel is arranged on the ejector bottom plate. The support plate is arranged on the substrate, and the support plate surrounds the ejector bottom plate and the ejector panel. The mounting plate is arranged on the supporting plate, and the large straight top is installed on the supporting plate.

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