Multi-station injection mold easy to demold

Abstract

The utility model discloses a multi-station injection mold easy to demold. According to the technical scheme, the mold comprises an upper mold plate, a lower mold plate, at least two upper mold cores arranged in the upper mold plate and at least two lower mold cores arranged in the lower mold plate, a product cavity is formed between the upper mold cores and the lower mold cores, and a runner communicated with the product cavity is formed in the upper mold plate. The runner comprises a transversely-arranged main runner and branch runners longitudinally communicated with the two ends of the main runner, and the upper end of the upper die plate is provided with a sprue bush communicated with the main runner through an upper fixing plate. The injection mold has the advantages that during injection molding, materials in the runner can enter the conical groove of the lining plate and wrap the conical head of the sprue puller, and when the upper mold plate and the lower mold plate are split, the sprue puller synchronously pulls slitter edges in the runner, so that the slitter edges can be effectively prevented from being snapped.

Description

Technical Field

[0001] The utility model belongs to the field of molds, and in particular relates to an injection mold. Background Art

[0002] An injection mold is a tool used for plastic injection molding. This mold is usually composed of an injection molding machine, a mold, and a locking system. The traditional multi-station injection mold structure includes: an upper mold plate, a lower mold plate, at least two upper mold cores arranged in the upper mold plate, and at least two lower mold cores arranged in the lower mold plate. A product cavity is formed between the upper mold core and the lower mold core. A flow channel connected to the product cavity is provided in the upper mold plate. The flow channel includes a transversely arranged main flow channel and a longitudinally connected branch flow channel at both ends of the main flow channel. The upper end of the upper mold plate is provided with a sprue bushing connected to the main flow channel through an upper fixed plate. A positioning ring is provided above the upper fixed plate corresponding to the sprue bushing. The lower mold plate is provided with a lower fixed plate through the mold feet on both sides. When the upper mold plate and the lower mold plate are separated, the product in the product cavity and the waste edge in the flow channel will be ejected together with the ejector pin. The disadvantage is that since the waste edge in the flow channel is thin, it is easy to be pulled off during demolding, which can easily lead to the flow channel being blocked and unable to be injected. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a multi-station injection mold which is easy to demould.

[0004] To solve the above problems, the technical solution adopted by the utility model includes: an upper template, a lower template, at least two upper mold cores arranged in the upper template and at least two lower mold cores arranged in the lower template, a product cavity is formed between the upper mold core and the lower mold core, a flow channel connected to the product cavity is provided in the upper template, the flow channel includes a transversely arranged main channel and a branch channel longitudinally connected to both ends of the main channel, a nozzle bushing connected to the main channel is provided at the upper end of the upper template through an upper fixed plate, a positioning ring is provided above the upper fixed plate corresponding to the nozzle bushing, and a lower fixed plate is provided through the mold feet on both sides of the lower template, characterized in that a lining plate is provided between the upper template and the upper fixed plate, the main channel is surrounded by the lining plate and the upper template, and a conical groove is provided above the connection between the main channel and the branch channel, a pulling rod is provided on the upper fixed plate, and a conical head extending into the conical groove is provided at the lower end of the pulling rod.

[0005] The multi-station injection mold that is easy to demold is characterized in that: a first guide column is provided on the upper fixed plate, the lower end of the first guide column is movably arranged in the axial hole of the lower fixed plate and the mold foot, a first guide sleeve that cooperates with the first guide column is provided on the lining plate, a second guide sleeve that cooperates with the first guide column is provided on the upper template, and a positioning block that cooperates with the second guide sleeve is provided at the bottom of the first guide column.

[0006] The multi-station injection mold that is easy to demould is characterized in that second guide pillars are provided on both sides of the lower mold plate, and third guide sleeves that cooperate with the second guide pillars are provided on both sides of the upper mold plate.

[0007] The multi-station injection mold that is easy to demould is characterized in that an ejector plate is provided at the bottom of the lower mold plate, and a group of ejector pins extending into the product cavity are provided on the ejector plate.

[0008] The multi-station injection mold that is easy to demould is characterized in that a buffer rod is also provided on the ejector plate, the upper end of the buffer rod is connected to the lower mold plate, and a buffer spring is provided between the buffer rod and the lower mold plate.

[0009] The multi-station injection mold that is easy to demould is characterized in that: the lower fixed plate is provided with an ejection hole that is connected to the ejection plate.

[0010] The multi-station injection mold that is easy to demould is characterized in that a locking screw is provided between the upper fixed plate and the lower mold plate.

[0011] The utility model has the following advantages for a multi-station injection mold that is easy to demold: during injection molding, the material in the flow channel will enter the conical groove of the liner and be wrapped around the conical head of the pulling rod; when the upper mold plate and the lower mold plate are separated, the pulling rod will synchronously pull the waste edge in the flow channel, thereby effectively preventing the waste edge from being broken.

[0012] The utility model is further described below in conjunction with the accompanying drawings of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a top view of the injection mold of the utility model;

[0014] Figure 2 yes Figure 1 AA section view;

[0015] Figure 3 yes Figure 1 BB section view;

[0016] Figure 4 yes Figure 1 CC section view;

[0017] Figure 5 yes Figure 2 Enlarged view of point D. DETAILED DESCRIPTION

[0018] Reference Figure 1-5As shown, the multi-station injection mold of the utility model which is easy to demould comprises an upper mold plate 1, a lower mold plate 2, two upper mold cores 3 arranged in the upper mold plate 1 and two lower mold cores 4 arranged in the lower mold plate 2, a product cavity 5 is formed between the upper mold core 3 and the lower mold core 4, and a flow channel 6 connected to the product cavity 5 is arranged in the upper mold plate 1. The flow channel 6 comprises a main flow channel 7 arranged transversely and a branch flow channel 8 connected to both ends of the main flow channel 7 longitudinally, a sprue bushing 10 connected to the main flow channel 7 is arranged at the upper end of the upper mold plate 1 through an upper fixing plate 9, and a positioning ring 11 is arranged above the upper fixing plate 9 corresponding to the sprue bushing 10. The lower mold plate 2 is provided with a lower fixing plate 13 through mold feet 12 on both sides. A lining plate 14 is provided between the upper mold plate 1 and the upper fixed plate 9, the main channel 7 is enclosed between the lining plate 14 and the upper mold plate 1, and a conical groove 15 is provided above the connection between the main channel 7 and the branch channel 8 of the lining plate 14, and a pulling rod 16 is provided on the upper fixed plate 9, and a conical head 17 extending into the conical groove 15 is provided at the lower end of the pulling rod 16.

[0019] Preferably, the upper fixed plate 9 is provided with a first guide column 18, the lower end of the first guide column 18 is movably arranged in the axial hole 19 of the lower fixed plate 13 and the mold foot 12, the lining plate 14 is provided with a first guide sleeve 20 that cooperates with the first guide column 18, the upper template 1 is provided with a second guide sleeve 21 that cooperates with the first guide column 18, and the bottom of the first guide column 18 is provided with a positioning block 22 that cooperates with the second guide sleeve 21, and the positioning block 22 is used to position the upper fixed plate 9 after the mold is in place. When demolding: first separate the upper template 1 from the lower template 2, and then separate the upper fixed plate 9 from the upper template 1, thereby achieving complete separation of the product.

[0020] Preferably, second guide posts 23 are provided on both sides of the lower template 2, and third guide sleeves 24 are provided on both sides of the upper template 1 to guide and cooperate with the second guide posts 23. They are used to guide the upper template 1 and the lower template 2 when the mold is opened and closed, so as to improve the injection molding accuracy.

[0021] Preferably, an ejector plate 25 is provided at the bottom of the lower template 2, and a group of ejector pins 26 extending into the product cavity 5 are provided on the ejector plate 25. An ejector hole 29 connected to the ejector plate 25 is provided on the lower fixed plate 13. During production, an ejector mechanism is also provided below the lower fixed plate 13, and an ejector rod is provided on the ejector mechanism, and the ejector rod passes through the ejector hole 29 and pushes against the ejector plate 25. When the upper template 1 and the lower template 2 are separated, the ejector pins 26 are driven by the ejector mechanism to eject the product in the product cavity 5, so as to realize automatic demolding.

[0022] Preferably, the ejector plate 25 is further provided with a buffer rod 27, the upper end of which is connected to the lower mold plate 2, and a buffer spring 28 is provided between the buffer rod 27 and the lower mold plate 2, for buffering the upper mold plate 1 and the lower mold plate 2 when the mold is closed.

[0023] Preferably, a locking screw 30 is provided between the upper fixing plate 9 and the lower mold plate 2. When the upper mold plate 1 and the lower mold plate 2 are molded together, they are locked by the locking screw 30 to ensure stability.

[0024] The above does not impose any form of limitation on the present invention. Although the present invention has been disclosed as a preferred implementation case as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the equivalent implementation cases of equivalent changes by using the structure and technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A multi-station injection mold that is easy to demould, comprising an upper mold plate (1), a lower mold plate (2), at least two upper mold cores (3) arranged in the upper mold plate (1) and at least two lower mold cores (4) arranged in the lower mold plate (2), a product cavity (5) is formed between the upper mold core (3) and the lower mold core (4), a flow channel (6) connected to the product cavity (5) is provided in the upper mold plate (1), the flow channel (6) comprises a transversely arranged main flow channel (7) and a branch flow channel (8) longitudinally connected to both ends of the main flow channel (7), a sprue bushing (10) connected to the main flow channel (7) is provided at the upper end of the upper mold plate (1) through an upper fixing plate (9), a positioning ring (11) is provided above the upper fixing plate (9) corresponding to the sprue bushing (10), and the lower mold plate (2) is provided with a lower fixing plate (13) through mold feet (12) on both sides, characterized in that: A lining plate (14) is provided between the upper mold plate (1) and the upper fixed plate (9), the main channel (7) is enclosed between the lining plate (14) and the upper mold plate (1), and a conical groove (15) is provided above the connection between the main channel (7) and the branch channel (8), and a pulling rod (16) is provided on the upper fixed plate (9), and a conical head (17) is provided at the lower end of the pulling rod (16) and extends into the conical groove (15).

2. The multi-station injection mold that is easy to demould according to claim 1, characterized in that: The upper fixed plate (9) is provided with a first guide column (18), the lower end of the first guide column (18) is movably arranged in the axial hole (19) of the lower fixed plate (13) and the mold foot (12), the lining plate (14) is provided with a first guide sleeve (20) cooperating with the first guide column (18), the upper mold plate (1) is provided with a second guide sleeve (21) cooperating with the first guide column (18), and the bottom of the first guide column (18) is provided with a positioning block (22) cooperating with the second guide sleeve (21).

3. The multi-station injection mold that is easy to demould according to claim 1, characterized in that: Second guide pillars (23) are provided on both sides of the lower template (2), and third guide sleeves (24) for guiding and cooperating with the second guide pillars (23) are provided on both sides of the upper template (1).

4. The multi-station injection mold that is easy to demould according to claim 1, characterized in that: An ejector plate (25) is provided at the bottom of the lower mold plate (2), and a group of ejector pins (26) extending into the product cavity (5) are provided on the ejector plate (25).

5. The multi-station injection mold that is easy to demould according to claim 4, characterized in that: The ejection plate (25) is also provided with a buffer rod (27), the upper end of the buffer rod (27) is connected to the lower mold plate (2), and a buffer spring (28) is provided between the buffer rod and the lower mold plate (2).

6. The multi-station injection mold that is easy to demould according to claim 4, characterized in that: The lower fixing plate (13) is provided with an ejection hole (29) which is in communication with the ejection plate (25).

7. The multi-station injection mold that is easy to demould according to claim 1, characterized in that: A locking screw (30) is provided between the upper fixing plate (9) and the lower mold plate (2).

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