Mold mechanism that uses a swing head to achieve automatic switching of two colors

Abstract

The present invention discloses a mold mechanism that uses a swing head to realize automatic two-color switching, comprising a mold body (1), a swing head (2), a spring (3), a guide block (4), a first driving rod (51), a second driving rod (52) and a cam mechanism (6); the swing head (2) is connected to the mold body (1) through a rotating shaft (9), the cam mechanism (6) pushes one of the first driving rod (51) and the second driving rod (52) back and forth once, and the pushed one of the first driving rod (51) and the second driving rod (52) pushes the swing head (2) to swing back and forth alternately in turn. The mold mechanism only needs to make a pair of molds, and the two-color switching is automatically realized by opening and closing the mold, and the mold molding efficiency is high and the production cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a mold mechanism which adopts a swing head to realize automatic switching of two colors. Background Art

[0002] Used for injection molding of plastic products. Since the product is composed of two materials, and both materials are of irregular shapes, the mold needs to adopt rotary two-color molding. It is a high-gloss two-color side tail product. One color part is made of PMMA acrylic, and the other part is made of TPE soft synthetic rubber. Both parts are irregular in shape and need to be produced by a rotary two-color molding machine. Since the product needs to be rotated, two molds need to be designed, and the mold manufacturing cost is doubled. In addition, the molding equipment needs to use a rotary two-color molding machine, which makes the product molding cost almost doubled, and the molding cycle of each product is also long. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a mold mechanism which only needs to make one mold, automatically realizes two-color switching by mold opening and closing, has high mold forming efficiency and low production cost, and uses a swing head to realize automatic two-color switching.

[0004] The technical solution of the present invention is to provide a mold mechanism with the following structure that uses a swing head to achieve automatic switching of two colors, including a mold body, a swing head, a guide block, a first driving rod, a second driving rod and a cam mechanism; the swing head is connected to the mold body through a rotating shaft, the same end of the first driving rod and the second driving rod is connected to the cam mechanism, and the other end passes through the mold body and is connected to the swing head, the cam mechanism reciprocates and pushes one of the first driving rod and the second driving rod once, and the pushed one of the first driving rod and the second driving rod pushes the swing head to swing back and forth alternately in turn.

[0005] The swing head comprises a first mounting seat and a second mounting seat which are at a certain angle, and the first mounting seat and the second mounting seat are both provided with a through hole for embedding one end of the product.

[0006] A first notch is provided at the corner of the swing head, and a first driven surface and a second driven surface are provided inside the notch, and the first driven surface and the second driven surface are symmetrical along the axis of the rotating shaft; the driving end of the first driving rod pushes the first driven surface to rotate the swing head in one direction along the rotating shaft, and the driving end of the second driving rod pushes the second driven surface to rotate the swing head in the opposite direction along the rotating shaft to reset.

[0007] The first driven surface and the second driven surface are located on a sector and are connected by one or more arcs.

[0008] Two compression springs are arranged in the mold body, a second notch is arranged at the corner of the swing head, the second notch is fan-shaped, one end of the two compression springs respectively abuts against one side wall of the second notch, and the other end abuts against the positioning rod in the mold body.

[0009] The first driving rod and the second driving rod are both sleeved with a first spring, one end of the first spring abuts against the step of the step hole in the mold body, and the other end abuts against the positioning sleeve on the driving rod. The first driving rod and the second driving rod are always connected to the cam mechanism under the action of the first spring.

[0010] The cam mechanism includes a gear seat, a drive seat and a second spring. The outer wall of the gear seat is provided with an upper cam and a lower cam. When the upper cam rotates circumferentially, it intermittently drives the first drive rod to perform linear extension and retraction. When the lower cam rotates circumferentially, it intermittently drives the second drive rod to perform linear extension and retraction. When the gear seat rotates reciprocatingly once, the upper cam drives the first drive rod or the lower cam drives the second drive rod alternately in sequence. The top surface of the gear seat is provided with a plurality of first bevel teeth distributed along the circumference, and the bottom surface of the drive seat is provided with second bevel teeth respectively matched with the first bevel teeth. The second spring is located in the gear seat and the top end is against the drive seat. Each time the drive seat is pressed down, the gear seat is driven to rotate once, and the second spring pushes the drive seat to reset upward.

[0011] The upper cam and the lower cam are both provided with two convex teeth and the two are staggered up and down. When the convex teeth of the upper cam push the first driving rod, the second driving rod abuts against the concave position at the connection between the two convex teeth; when the convex teeth of the lower cam push the second driving rod, the first driving rod abuts against the concave position at the connection between the two convex teeth.

[0012] The first mounting seat and the second mounting seat are vertically arranged, and the angle between them is a right angle.

[0013] After adopting the above structure, the present invention has the following advantages: when the hard rubber product is formed, when the mold is closed for the first time, the first driving rod is driven by the cam of the cam mechanism to make the swing head rotate 90° clockwise, and after swinging to the position, the mold forms the hard rubber at this time. When the mold is opened, the cam is driven by the spring and gear inside the cam mechanism to rotate 90° counterclockwise, and the first driving rod and the second driving rod are not subjected to force, and the swing head can swing; when the soft rubber product is formed, when the mold is closed for the second time, the second driving rod is driven by the cam of the cam mechanism to rotate the swing head 90° counterclockwise, and after swinging to the position, the mold forms the soft rubber at this time; similarly, when the mold is opened, the cam is driven by the spring and gear inside the cam mechanism to rotate 90° counterclockwise again, and the first driving rod and the second driving rod are not subjected to force, and the swing head can swing; the mold is opened and closed in sequence, and the cam mechanism drives the two driving rods to drive the swing head to switch between the two states continuously; thereby realizing two-color molding; only one mold needs to be made, and the two-color switching is automatically realized by using the mold opening and closing, and the mold molding efficiency is high and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a mold mechanism of the present invention that uses a swing head to achieve automatic switching of two colors.

[0015] Figure 2 It is a schematic diagram of the mold mechanism in state 1 that uses a swing head to realize automatic switching of two colors according to the present invention.

[0016] Figure 3 for Figure 2 Schematic cross-section of the state.

[0017] Figure 4 It is a schematic diagram of the mold mechanism in state 2 that uses a swing head to realize automatic switching of two colors according to the present invention.

[0018] Figure 5 for Figure 4 Schematic cross-section of the state.

[0019] Figure 6 It is a schematic diagram of the connection between two driving rods and a cam mechanism of the present invention.

[0020] Figure 7 It is a partial exploded schematic diagram of two driving rods and a cam mechanism of the present invention.

[0021] Figure 8 It is a schematic structural diagram of the back side of the mold body of the present invention.

[0022] As shown in the figure:

[0023] 1. mold body, 2. swing head, 2.1. first driven surface, 2.2. second driven surface, 2.3. first notch, 2.4. second notch,

[0024] 3. Spring, 4. Guide block, 51. First drive rod, 52. Second drive rod, 6. Cam mechanism, 6.1. Gear seat, 6.1.1. Upper cam, 6.1.2. Lower cam, 6.1.3. First oblique tooth, 6.2. Drive seat, 6.2.1. Second oblique tooth, 6.3. Second spring, 7. Compression spring, 8. First spring, 9. Rotating shaft. DETAILED DESCRIPTION

[0025] The present invention will be further explained below in conjunction with the embodiments and drawings.

[0026] like Figure 1-8 As shown, a mold mechanism of the present invention that uses a swing head to achieve automatic switching of two colors includes a mold body 1, a swing head 2, a guide block 4, a first driving rod 51, a second driving rod 52 and a cam mechanism 6; the swing head 2 is connected to the mold body 1 through a rotating shaft 9, the same end of the first driving rod 51 and the second driving rod 52 is connected to the cam mechanism 6, and the other end passes through the mold body 1 and is connected to the swing head 2, the cam mechanism 6 reciprocates and pushes one of the first driving rod 51 and the second driving rod 52 once, and the pushed one of the first driving rod 51 and the second driving rod 52 pushes the swing head 2 to swing back and forth alternately in turn.

[0027] The swing head 2 includes a first mounting seat and a second mounting seat at a certain angle, and the first mounting seat and the second mounting seat are both provided with a through hole for one end of the product to be embedded. The first mounting seat and the second mounting seat are vertically arranged, and the angle between them is a right angle, that is, a symmetrical L-shaped

[0028] A first notch 2.3 is provided at the corner of the swing head 2, and a first driven surface 2.1 and a second driven surface 2.2 are provided inside the notch. The first driven surface 2.1 and the second driven surface 2.2 are symmetrical along the axis of the rotating shaft 9. The driving end of the first driving rod 51 pushes the first driven surface 2.1 to rotate the swing head 2 in one direction along the rotating shaft 9, and the driving end of the second driving rod 52 pushes the second driven surface 2.2 to rotate the swing head 2 in the opposite direction along the rotating shaft 9 to reset.

[0029] The first driven surface 2.1 and the second driven surface 2.2 are located on a sector and are connected by one or more arcs. In this embodiment, the two end arcs are used for connection, so that when the swing head 2 rotates along the rotating shaft 9, the end surfaces of the first driving rod 51 and the second driving rod 52 can rotate smoothly and avoid each other, and the two end arcs can not interfere with the first driving rod 51 and the second driving rod 52.

[0030] like Figure 8As shown, two compression springs 7 are arranged in the mold body 1, and a second notch 2.4 is arranged at the corner of the swing head 2. The second notch 2.4 is fan-shaped. One end of the two compression springs 7 respectively abuts against one side wall of the second notch 2.4, and the other end abuts against the positioning rod in the mold body 1.

[0031] The first driving rod 51 and the second driving rod 52 are both sleeved with a first spring 8, one end of the first spring 8 is against the step of the step hole in the mold body 1, and the other end is against the positioning sleeve on the driving rod. The first driving rod 51 and the second driving rod 52 are always connected to the cam mechanism 6 under the action of the first spring 8, and the first spring 8 can drive the rod to always tend to the forward top state.

[0032] like Figure 6 and Figure 7 As shown, the cam mechanism 6 includes a gear seat 6.1, a drive seat 6.2 and a second spring 6.3. The outer wall of the gear seat 6.1 is provided with an upper cam 6.1.1 and a lower cam 6.1.2. The upper cam 6.1.1 rotates circumferentially to intermittently drive the first drive rod 51 to perform linear extension and retraction. The lower cam 6.1.2 rotates circumferentially to intermittently drive the second drive rod 52 to perform linear extension and retraction. The gear seat 6.1 rotates reciprocatingly once, and the upper cam 6.1.1 drives the first drive rod 51 or the lower cam 6.1.2 to perform linear extension and retraction. .1.2 drives the second driving rod 52 alternately in sequence; the top surface of the gear seat 6.1 is provided with a plurality of first bevel teeth 6.1.3 distributed along the circumference, and the bottom surface of the driving seat 6.2 is provided with second bevel teeth 6.2.1 which are matched with the first bevel teeth 6.1.3 one by one, and the second spring 6.3 is located in the gear seat 6.1 and the top end is against the driving seat 6.2, and each time the driving seat 6.2 is pressed down, the gear seat 6.1 is driven to rotate once, and the second spring 6.3 pushes the driving seat 6.2 to reset upward.

[0033] The upper cam 6.1.1 and the lower cam 6.1.2 are both provided with two convex teeth and the two are staggered up and down. When the convex teeth of the upper cam 6.1.1 push the first driving rod 51, the second driving rod 52 abuts against the concave position at the connection between the two convex teeth; when the convex teeth of the lower cam 6.1.2 push the second driving rod 52, the first driving rod 51 abuts against the concave position at the connection between the two convex teeth.

[0034] The present invention designs a two-color automatic switching structure in a two-color molding mold, and utilizes the opening and closing of the mold to automatically switch between two different shape structures, thereby realizing two-color molding. The specific working principle is as follows:

[0035] A. The state of hard plastic products during molding, such as Figure 2 and Figure 3When the mold is closed for the first time, the second driving rod 52 is driven by the lower cam 6.1.2 of the cam mechanism 6, so that the swing head 1 rotates 90° clockwise and swings to Figure 2 position and maintain it Figure 2 When the mold is opened, the cam rotates 90° counterclockwise under the drive of the second spring 6.3, the first bevel gear 6.1.3 and the second bevel gear 6.2.1 inside the cam mechanism 6, and the first driving rod 51 and the second driving rod 52 are not subjected to force, so the swing head 1 can swing;

[0036] B. The state of soft rubber products during molding, such as Figure 4 and Figure 5 When the mold is closed for the second time, the first driving rod 51 is driven by the upper cam 6.1.1 of the cam mechanism 6, so that the swing head 1 rotates 90° counterclockwise and swings to Figure 4 position and keep it Figure 4 position, at this time the mold forms soft rubber; similarly, when the mold is opened, driven by the second spring 6.3 inside the cam mechanism 6 and the first bevel gear 6.1.3 and the second bevel gear 6.2.1, the cam is rotated 90° counterclockwise again, the first drive rod 51 and the second drive rod 52 are not subjected to force, and the swing head 1 can swing;

[0037] C. Open and close the mold in sequence, and the cam mechanism 6 drives the two driving rods to drive the swing head 1 to continuously switch between two states; thereby realizing two-color molding.

Claims

1. A mold mechanism for realizing automatic two-color switching by using a swing head, comprising a mold body (1), a swing head (2), a guide block (4), a first driving rod (51), a second driving rod (52) and a cam mechanism (6); the swing head (2) is connected to the mold body (1) via a rotating shaft (9); the first driving rod (51) and the second driving rod (52) are connected to the cam mechanism (6) at the same end, and the other end passes through the mold body (1) and is connected to the swing head (2); the cam mechanism (6) pushes one of the first driving rod (51) and the second driving rod (52) back and forth once, and the pushed one of the first driving rod (51) and the second driving rod (52) The swing head (2) is alternately pushed to swing back and forth in sequence; a first notch (2.3) is provided at a corner of the swing head (2); a first driven surface (2.1) and a second driven surface (2.2) are provided on an inner side wall of the first notch (2.3); the first driven surface (2.1) and the second driven surface (2.2) are symmetrical along the axis of the rotating shaft (9); the driving end of the first driving rod (51) pushes the first driven surface (2.1) to rotate the swing head (2) in one direction along the rotating shaft (9); the driving end of the second driving rod (52) pushes the second driven surface (2.2) to rotate the swing head (2) in the opposite direction along the rotating shaft (9) to reset.

2. According to claim 1, a mold mechanism using a swing head to achieve automatic switching of two colors, characterized in that: The swing head (2) comprises a first mounting seat and a second mounting seat which are formed at a certain angle, and the first mounting seat and the second mounting seat are both provided with a through hole for embedding one end of the product.

3. According to claim 1, a mold mechanism using a swing head to achieve automatic switching of two colors, characterized in that: The first driven surface (2.1) and the second driven surface (2.2) are located on a sector and are connected by one or more circular arcs.

4. A mold mechanism using a swing head to achieve automatic two-color switching according to claim 1 or 2, characterized in that: Two compression springs (7) are arranged in the mold body (1), and a second notch (2.4) is arranged at a corner of the swing head (2). The second notch (2.4) is fan-shaped, and one end of the two compression springs (7) respectively abuts against a side wall of the second notch (2.4), and the other end abuts against a positioning rod in the mold body (1).

5. The mold mechanism using a swing head to realize automatic switching of two colors according to claim 1, characterized in that: The first driving rod (51) and the second driving rod (52) are both sleeved with a first spring (8), one end of the first spring (8) abuts against the step of the step hole in the mold body (1), and the other end abuts against the positioning sleeve on the driving rod. The first driving rod (51) and the second driving rod (52) are always connected to the cam mechanism (6) under the action of the first spring (8).

6. The mold mechanism using a swing head to realize automatic switching of two colors according to claim 1, characterized in that: The cam mechanism (6) comprises a gear seat (6.1), a drive seat (6.2) and a second spring (6.3); an upper cam (6.1.1) and a lower cam (6.1.2) are provided on the outer wall of the gear seat (6.1); the upper cam (6.1.1) rotates circumferentially to intermittently drive the first drive rod (51) to perform linear extension and retraction; the lower cam (6.1.2) rotates circumferentially to intermittently drive the second drive rod (52) to perform linear extension and retraction; when the gear seat (6.1) reciprocates circumferentially once, the upper cam (6.1.1) drives the first drive rod (51) or the lower cam (6.1.2) drives the second drive rod (52) alternately in sequence; a plurality of first bevel teeth (6.1.3) distributed along the circumference are provided on the top surface of the gear seat (6.1); and second bevel teeth (6.1.3) respectively matched one by one with the first bevel teeth (6.1.3) are provided on the bottom surface of the drive seat (6.2). 6.2.1), the second spring (6.3) is located in the gear seat (6.1) and the top end is against the drive seat (6.2), and each time the drive seat (6.2) is pressed down, the gear seat (6.1) is driven to rotate once, and the second spring (6.3) pushes the drive seat (6.2) to reset upward.

7. The mold mechanism using a swing head to realize automatic switching of two colors according to claim 6, characterized in that: The upper cam (6.1.1) and the lower cam (6.1.2) are both provided with two convex teeth and are arranged in an up-down staggered manner. When the convex teeth of the upper cam (6.1.1) push the first driving rod (51), the second driving rod (52) abuts against the recessed position at the connection between the two convex teeth; when the convex teeth of the lower cam (6.1.2) push the second driving rod (52), the first driving rod (51) abuts against the recessed position at the connection between the two convex teeth.

8. The mold mechanism using a swing head to realize automatic switching of two colors according to claim 2, characterized in that: The first mounting seat and the second mounting seat are vertically arranged, and the angle between them is a right angle.

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