A seesaw type double material glue feeding structure

Abstract

The present invention relates to the field of mold technology, and provides a seesaw type double-material glue feeding structure, including a lower mold plate, a fixed seat, a seesaw provided on the fixed seat through a rotating shaft and having a first end and a second end, a driving mechanism for driving the seesaw to reciprocate along the rotating shaft, a core pulling seat abutting against the first end of the seesaw and a core pulling rod connected to the core pulling seat, an injection channel at the bottom of the lower mold plate, a secondary glue feeding channel connected to one side of the injection channel, and a core pulling rod capable of entering and exiting the injection channel so as to isolate or connect the secondary glue feeding channel and the injection channel. In a mold for double-material glue feeding, glue is fed from the bottom through the seesaw type glue feeding structure, thereby avoiding the influence of the gate on the appearance of the product, effectively preventing the generation of flow marks, weld marks and internal stress, so that the manufactured product has the characteristics of beautiful appearance, stable quality, good comfort, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and relates to a mold glue feeding structure, in particular to a seesaw type double-material glue feeding structure. Background Art

[0002] The inner handle of the car door panel is an important plastic part on the car door panel. The inner handle of the car door panel needs to be injection molded with two materials, PC and TPE. Since the surface of the secondary injection molding material TPE of this double-injection molded part belongs to the A-level surface, the surface of the product is required to be seamless. The existing double-injection molding method is easy to leave defects such as gates, flow marks, and sun spots on the surface of the product. Summary of the invention

[0003] The purpose of the present invention is to provide a seesaw type double material injection structure to solve the technical problem of the prior art in solving the influence of the injection gate on the product appearance.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention creatively provides a seesaw type double-material glue feeding structure, including a lower template and a fixed seat, a seesaw provided on the fixed seat through a rotating shaft and having a first end and a second end, a driving mechanism for driving the seesaw to reciprocate along the rotating shaft, a core pulling seat abutting against the first end of the seesaw and a core pulling rod connected to the core pulling seat, an injection channel is provided at the bottom of the lower template, one side of the injection channel is connected to a secondary glue feeding channel, and the core pulling rod can enter and exit the injection channel to isolate or connect the secondary glue feeding channel and the injection channel.

[0006] In the seesaw double-material injection structure, the injection channel is arranged in the vertical direction, the top of the injection channel extends to the molding surface of the lower mold plate, and the top of the core pulling rod extends from the bottom of the injection channel. When the top of the core pulling rod moves to the molding surface, the secondary injection flow channel is isolated from the injection channel. When the top of the core pulling rod moves to the bottom of the secondary injection flow channel, the secondary injection flow channel is separated from the injection channel.

[0007] When the secondary glue inlet channel is connected with the injection channel.

[0008] In the above-mentioned seesaw type double-material glue feeding structure, the driving mechanism includes a first return rod abutting against the first end of the seesaw and a second return rod abutting against the second end of the seesaw.

[0009] In the above-mentioned seesaw type double-material glue feeding structure, the first return rod is penetrated in the core pulling seat.

[0010] In the above-mentioned seesaw type double-material glue feeding structure, it also includes a base plate used to connect to the fixed seat and located below the fixed seat, and a guide column vertically arranged between the base plate and the lower template. The core pulling seat is connected to the guide column and can perform axial reciprocating motion along the guide column.

[0011] In the above-mentioned seesaw type double-material injection structure, the injection channel is flat, and the top end of the injection channel is connected to the lower template near the edge of the cavity.

[0012] In the above-mentioned seesaw type double-material injection structure, the molding surface of the lower template has a convex rib near the edge, and a groove is provided between the convex rib and the edge. The top end of the injection channel is arranged on the convex rib and is connected to the groove through one end of the convex rib near the edge.

[0013] In the above-mentioned seesaw type dual-material glue feeding structure, the connecting section of the secondary glue feeding channel with the injection channel is inclined downward.

[0014] In the seesaw type double-material injection structure, the upper portion of the core pulling seat is provided with an upper limit piece, and when the core pulling rod moves to close the injection channel, the upper limit piece is in close contact with the bottom of the lower mold plate.

[0015] In the seesaw dual-material injection structure, the bottom of the core-pulling seat has a lower limit support. When the lower limit support falls down on the bottom plate, the core-pulling rod is pulled out of the injection channel to connect the secondary injection channel with the injection channel.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1) In the double-material injection mold, the glue is injected from the bottom through the seesaw injection structure, thereby avoiding the influence of the gate on the product appearance, effectively preventing the generation of flow marks, welding marks and internal stress, so that the manufactured product has the characteristics of beautiful appearance, stable quality and good comfort.

[0018] 2) The two return rods work alternately to open and close the glue feeding channel, greatly improving

[0019] It improves the working efficiency of the glue injection process, has a simple structure and is easy to operate. The axial movement makes it have high accuracy and ensures the smooth movement of the core pulling rod.

[0020] 3) The structure is compact, does not take up too much space, avoids volume waste, and saves production and use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a schematic diagram of a three-dimensional structure provided by the present invention.

[0022] FIG. 2 is a partial cross-sectional view provided by the present invention.

[0023] FIG. 3 is a cross-sectional view from another angle provided by the present invention.

[0024] FIG4 is a partial enlarged view of FIG3.

[0025] FIG. 5 is a schematic diagram of a partial structure of another state provided by the present invention.

[0026] In the figure, the lower template 1, the molding surface 10, the injection channel 11, the secondary glue flow 12, the rib 13, the groove 14, the connecting seat 15, the fixed seat 2, the seesaw 3, the rotating shaft 30, the first end 31, the second end 32, the core pulling seat 4, the core pulling rod 40, the first return rod 51, the second return rod 52, the bottom plate 6, the guide column 7, the upper limit member 8, and the lower limit support member 9. DETAILED DESCRIPTION

[0027] The present invention is further illustrated by the following examples.

[0028] As shown in FIG. 1 , FIG. 2 and FIG. 3 , a seesaw 3-type double-material injection structure for an inner handle mold of an automobile door panel comprises a lower mold plate 1, a bottom plate 6 disposed below the lower mold plate 1, a fixed seat 2 disposed on the bottom plate 6, and a seesaw 3 disposed on the fixed seat 2 and having a first end 31 and a second end 32, which can be rotatably disposed through a rotating shaft 30. The lower mold plate 1 has a molding surface 10 for enclosing a mold cavity with an upper mold plate (not shown in the figure), and the bottom of the lower mold plate 1 has an injection channel 11 connected to the molding surface 10, and one side of the injection channel 11 is connected to a secondary injection flow channel 12 for injection of TPE material. The seesaw 3 reciprocates along the rotating shaft 30 driven by the driving mechanism, driving the core pull rod 40 to enter and exit the injection channel 11, so that the secondary injection flow channel 12 and the injection channel 11 are isolated or connected.

[0029] As shown in FIG. 2 , the structure of the driving mechanism specifically includes a first return rod 51 abutting against the first end 31 of the seesaw 3 and a second return rod 52 abutting against the second end 32 of the seesaw 3 .

[0030] Preferably, the first return rod 51 and the second return rod 52 are pneumatic return rods, which are purchased from Foshan Shunde Jinxian Gas Spring Co., Ltd. The pneumatic return rods can alternately press the seesaw 3 and slowly reset it, so that the seesaw 3 rotates back and forth.

[0031] As another optional embodiment, the first return rod 51 and the second return rod 52 are respectively connected to an external cylinder (not shown in the figure), and the external cylinder controls the first return rod 51 and the second return rod 52 to alternately move within a specified stroke to drive the seesaw 3 to reciprocate.

[0032] As shown in FIG. 1 and FIG. 2 , there are two guide pillars 7 between the bottom plate 6 and the lower mold plate 1. The core puller 4 is connected to the guide pillars 7 through the guide pillar holes and can make axial reciprocating motion along the guide pillars 7, thereby guiding the core puller 4 to make vertical motion. Specifically, in combination with FIG. 1 and FIG. 3 , the axial direction of the guide pillars 7 is consistent with the axial direction of the injection channel 11, ensuring smooth movement of the core puller 40.

[0033] As shown in FIG1 , the first return rod 51 is movably disposed in the core puller 4, and both the first return rod 51 and the second return rod 52 move in the lower mold plate 1; or the first return rod 51 moves in the lower mold plate 1, and the second return rod 52 is connected to the connecting seat 15 outside the lower mold plate 1. The structure is compact, does not occupy too much space, and avoids volume waste.

[0034] As shown in Fig. 3, Fig. 4 and Fig. 5, the upper portion of the core puller 4 has an upper limit member 8. When the core puller rod 40 moves to close the injection channel 11, the upper limit member 8 is in close contact with the bottom of the lower mold plate 1 to prevent the core puller rod 40 from being ejected. The bottom of the core puller 4 has a lower limit support member 9. When the lower limit support member 9 falls downward on the bottom plate 6, the core puller rod 40 is pulled out of the injection channel 11 to connect the secondary glue feed channel 12 with the injection channel 11.

[0035] As shown in FIG4 , the connecting section of the secondary glue feed channel 12 with the injection channel 11 is tilted downward. When the top end of the core pull rod 40 moves to the molding surface 10, the secondary glue feed channel 12 and the injection channel 11 are isolated; as shown in FIG5 , when the top end of the core pull rod 40 moves below the secondary glue feed channel 12, the secondary glue feed channel 12 and the injection channel 11 are connected.

[0036] As shown in FIG5 , the molding surface 10 of the lower mold plate 1 has a rib 13 near the edge, and a groove 14 for injecting TPE is provided between the rib 13 and the edge. The top of the injection channel 11 is arranged on the rib 13, and is connected to the groove 14 through one end of the rib 13 near the edge. The injection channel 11 is flat to correspond to the flat TPE cavity edge, so as to facilitate the injection of glue from the inner edge of the cavity bottom and avoid gate marks. The top of the core pull rod 40 is also flat corresponding to the injection channel 11, thereby isolating the injection channel 11.

[0037] The working principle of the present invention is as follows:

[0038] As shown in Figures 2, 3, 4 and 5, when the PC material is injected (as shown in Figure 4), the second return rod 52 is pressed down so that the first end 31 of the seesaw 3 is at the top and the second end 32 is at the bottom, the upper limit support 8 is pressed against the bottom of the lower template 1, and the top end of the core pull rod 40 extends out of the molding surface 10 of the lower template 1, isolating the injection channel 11 from the secondary injection flow channel 12, so that the TPE material cannot flow into the injection channel 11. When the TPE material is injected (as shown in Figure 5), the first return rod 51 is pressed down so that the first end 31 of the seesaw 3 is at the bottom and the second end 32 is at the top, the lower limit support 9 is pressed against the bottom plate 6, and the top end of the core pull rod 40 is pulled out to the bottom of the secondary injection flow channel 12, so that the injection channel 11 is connected with the secondary injection flow channel 12 for the injection of TPE material, and the secondary injection is completed.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although the following terms are used more frequently in this article, such as lower mold plate 1, mold cavity 10, injection channel 11, secondary injection flow channel 12, rib 13, groove 14, fixed seat 2, rocker 3, first end 31, second end 32, core pull seat 4, core pull rod 40, first return rod 51, second return rod 52, bottom plate 6, guide column 7, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention. It is contrary to the spirit of the present invention to interpret them as any additional limitation.

Claims

1. A seesaw type double-material glue feeding structure, comprising a lower template (1), Features: It also includes a fixed seat (2), a seesaw (3) provided on the fixed seat (2) via a rotating shaft (30) and having a first end (31) and a second end (32), a driving mechanism for driving the seesaw (3) to reciprocate along the rotating shaft (30), a core pulling seat (4) abutting against the first end (31) of the seesaw (3) and a core pulling rod (40) connected to the core pulling seat (4), the bottom of the lower mold plate (1) having an injection channel (11), one side of the injection channel (11) being connected to a secondary glue feed channel (12), the core pulling rod (40) being able to enter and exit the injection channel (11) so as to isolate or connect the secondary glue feed channel (12) and the injection channel (11), The lower mold plate (1) has a molding surface (10) for enclosing a molding cavity with the upper mold plate. The injection channel (11) is arranged in a vertical direction, the top end of the injection channel (11) extends to the molding surface (10) of the lower mold plate (1), and the core pulling rod (40) extends into the bottom of the injection channel (11). When the top end of the core pulling rod (40) moves to the molding surface (10), the secondary glue feed flow channel (12) and the injection channel (11) are isolated. When the top end of the core pulling rod (40) moves below the secondary glue feed flow channel (12), the secondary glue feed flow channel (12) and the injection channel (11) are connected. The connecting section of the secondary glue feed channel (12) and the injection channel (11) is inclined downward.

2. A seesaw type double material glue feeding structure according to claim 1, Features: The driving mechanism comprises a first return rod (51) abutting against the top of the first end (31) of the seesaw (3) and a second return rod (52) abutting against the top of the second end (32) of the seesaw (3).

3. A seesaw type double material glue feeding structure according to claim 2, Features: The first return rod (51) is inserted into the core pulling seat (4).

4. A seesaw type double material glue feeding structure according to claim 1, Features: It also comprises a bottom plate (6) for connecting to the fixing seat (2) and located below the fixing seat, and a guide column (7) vertically arranged between the bottom plate (6) and the lower mold plate (1), wherein the core pulling seat (4) is connected to the guide column (7) and can perform axial reciprocating motion along the guide column (7).

5. The seesaw type double material glue feeding structure according to claim 1, Features: The injection channel (11) is flat, and the top end of the injection channel (11) is connected to the lower mold plate (1) at a position close to the edge of the mold cavity.

6. A seesaw type double material glue feeding structure according to claim 5, Features: The molding surface (10) of the lower mold plate (1) has a convex rib (13) near the edge, and a groove (14) is provided between the convex rib (13) and the edge; the top end of the injection channel (11) is arranged on the convex rib (13), and is connected to the groove (14) through one end of the convex rib (13) near the edge.

7. The seesaw type double material glue feeding structure according to claim 1, Features: The upper portion of the core pulling seat (4) is provided with an upper limit positioning member (8), and when the core pulling rod (40) moves to close the injection channel (11), the upper limit positioning member (8) is tightly attached to the bottom of the lower mold plate (1).

8. The seesaw type double material glue feeding structure according to claim 4, Features: The bottom of the core-pulling seat (4) is provided with a lower limit support member (9), and when the lower limit support member (9) falls downward onto the bottom plate (6), the core-pulling rod (40) is pulled out of the injection channel (11) so that the secondary glue feed channel (12) and the injection channel (11) are connected.

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