Secondary action slider structure for two-color injection molding machine

Abstract

The present application is a secondary action slider structure of a two-color injection molding machine, which comprises a pair of slider pressing plates arranged on a male mold, a molding slider, a fixed guide block and a dragging block, and an on-off device arranged on a female mold. The molding slider, the dragging block and the fixed guide block are arranged in sequence, and corresponding limiting sliding grooves and limiting sliding blocks are arranged between them for connection. A jack is arranged on the top of the dragging block corresponding to the on-off device. Accordingly, when the female mold and the male mold are closed, the on-off device is inserted into the jack hole, so that the dragging block is moved upward and the molding slider is moved horizontally backward after the mold is opened. The molding slider does not retreat during the first injection action, but retreats during the second injection action, which ensures the pre-pressing effect required by the female mold and improves the molding quality.

Description

TECHNICAL FIELD

[0001] The present invention relates to a mold design, in particular, a secondary action slider structure of a two-color injection molding machine, which is used to make the required catch or appearance requirements in the finished product, and can not be retracted during the first injection molding, but only during the second injection molding, to ensure the required pre-pressing effect of the second injection mold, and to improve the quality of the finished product. BACKGROUND

[0002] Two-color injection molding, as the name implies, is a molding method in which two different colors or physical properties of plastic are injected into the same mold, resulting in a finished product with two different colors or physical properties, to improve its practicality and aesthetic appearance.

[0003] Two-color injection molding process has a double-barreled nozzle to inject different plastics. First, after the first set of molds is closed, a first material is injected into the first set of molds through a first set of nozzles to form a semi-finished product. After cooling, the mold is opened. Then, the two-color injection molding machine replaces the first set of molds with a second set of molds and replaces the second set of nozzles with the second set of molds. After the mold is closed, the second set of nozzles can be used to inject a second material into the second set of molds. After cooling and ejection, a two-color molded product is obtained. However, two-color injection molding must pay attention to the bonding strength between different materials. If this problem can be overcome, two-color injection molding can be said to be a very efficient manufacturing process. Since components with multiple colors, raw materials, or complex designs are injection molded in one injection molding machine, two-color injection molding can achieve more functionality, simplicity, and better cost-effectiveness compared to other molding methods or multiple molding methods.

[0004] The present inventor has realized that when producing a notebook computer shell, a catch or other structural component with appearance requirements is arranged at a position opposite to a pivot device, and a molding slider is used to achieve its molding work. Therefore, in a two-color injection molding machine, if the molding slider is used to seal the soft glue, it must not be retracted during the first injection molding (referred to as one-shot). If it is not used to seal the soft glue during the second injection molding (referred to as two-shot), it will be retracted immediately after one-shot is completed. However, because of the pre-pressing problem of the second injection mold, if the molding slider is retracted first, it will cause the product to lose support and become hollow, resulting in poor molding after two-shot. Therefore, based on the inventor's experience in designing molds for many years, a two-shot retracting slider structure that does not retract during one-shot but retracts during two-shot is designed to improve the shortcomings in the molding process. Of course, such a structure design is not only used for this purpose, but also provides more extensive production needs. SUMMARY

[0005] The object of the present invention is to provide a secondary action slider structure for a two-shot injection molding machine, which is composed of a pair of slider pressure plates, a molding slider, a fixed guide block and a drag block arranged on a male mold, and an opener and closeer provided on a two-shot female mold. The molding slider, the drag block and the fixed guide block are arranged in sequence. Through a special limit connection structure, when performing the closing and opening actions of the primary and secondary injection molds, the molding slider produces a secondary retraction action without retracting the primary shot, thereby ensuring the pre-pressing effect required by the two-shot female mold and improving the molding quality.

[0006] To achieve the above-mentioned purpose, the secondary action slider structure of the two-color injection molding machine of the present invention is movably installed in a male mold, and the two-color injection molding machine is provided with a one-shot female mold and a two-shot female mold, so that the first female mold and the second female mold can perform a mold closing operation on the corresponding male mold according to the production process. The secondary action slider structure includes: a pair of slider pressure plates, symmetrically arranged on the male mold, so that a sliding space is formed between the two slider pressure plates and the male mold; a molding slider, movably arranged in the sliding space, and a flange is respectively provided on the two side surfaces of the molding slider for limiting the position below the pair of slider pressure plates, and a first limiting slide groove is provided on the rear side of the molding slider; a fixed guide block, which is arranged at intervals on one side of the molding slider, and a second limiting slider is provided on the front side of the fixed guide block, and the extension direction of the second limiting slider is perpendicular to the male mold; a drag block, the front of which A first limiting slider is provided on the side corresponding to the first limiting slide groove, and a second limiting slide groove is provided on the rear side corresponding to the second limiting slide groove, so as to limit the drag block between the forming slider and the fixed guide block, and a socket is provided on the top surface of the drag block; and an opener and a shutter are installed in the two-shot female mold, and the opener and the shutter are arranged corresponding to the position of the socket; accordingly, when the one-shot female mold and the male mold are clamped, since the one-shot female mold is not provided with an opener and the shutter, the forming slider will not move when the one-shot mold is opened, and when the two-shot female mold and the male mold are clamped, the opener and the shutter of the second female mold will be inserted into the socket. After the mold is separated, the opener and the shutter drive the drag block to move upward along the second limiting slide groove and the second limiting slide groove, and the forming slider is driven to move horizontally backward by the interaction of the first limiting slide groove and the first limiting slide groove, so that the forming slider leaves its original position.

[0007] In one embodiment, the shutter of the present invention is made of rubber, and a molding support is provided on the front side of the molding slider. Furthermore, the first and second limiting sliders are T-shaped, and the first limiting groove is a T-shaped groove corresponding to the shape of the first limiting slider, and the second limiting groove is a T-shaped groove corresponding to the shape of the second limiting slider. Furthermore, the first limiting slider and the first limiting groove are arranged at an angle, and the angle between the junction line of the first limiting slider and the first limiting groove and the male mold surface is 60 to 75 degrees.

[0008] In another embodiment, a pair of limiting bosses are provided on a surface of the drag block of the present invention corresponding to the second limiting slide groove, and a pair of limiting notches are provided on the fixed guide block corresponding to the pair of limiting bosses, so that the pair of limiting bosses are respectively located in the pair of limiting notches, and the length of the pair of limiting notches corresponds to the stroke of the upward movement of the drag block, which can prevent the drag block from being detached from the fixed guide block due to the mold separation of the two-shot mother mold.

[0009] In another embodiment, to maintain the stability of the molding slider's movement, each slider pressure plate of the present invention is provided with two fixing holes for screwing onto the male mold. Each slider pressure plate also has a recess corresponding to each flange, allowing each flange to be flexibly positioned within the recess, thereby preventing warping. Furthermore, the secondary motion slider structure of the two-shot injection molding machine of the present invention also includes a travel limiter and a spring, with a home position and a release position correspondingly positioned on the bottom surface of the molding slider. The travel limiter is protruded from the male mold surface by the spring, allowing the travel limiter to be positioned at the home position or release position according to the movement of the molding slider, thus preventing the risk of falling off due to excessive operation.

[0010] The specific technology adopted by the present invention will be further described through the following embodiments and accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 It is a structural diagram of a preferred embodiment of the present invention.

[0012] Figure 2 It is a schematic diagram of the state of the preferred embodiment of the present invention during installation.

[0013] Figure 3 It is a schematic diagram of the state of a preferred embodiment of the present invention when performing one shot and closing the mold.

[0014] Figure 4 It is a schematic diagram of the state of a preferred embodiment of the present invention when performing a first shot mold opening.

[0015] Figure 5 It is a schematic diagram of the state of a preferred embodiment of the present invention during two-shot mold closing.

[0016] Figure 6 1 is a schematic diagram of the state of a preferred embodiment of the present invention during two-shot mold opening.

[0017] Description of main component symbols:

[0018] 1 Secondary action slider structure

[0019] 11 Slider pressure plate

[0020] 111 Sliding Space

[0021] 112 fixing holes

[0022] 113 fixing screw

[0023] 114 Notch

[0024] 12 Forming Slide

[0025] 121 flange

[0026] 122 First limit chute

[0027] 123 top support

[0028] 124 original positioning points

[0029] 125 separation anchor point

[0030] 13 Fixed guide block

[0031] 131 Second limit slider

[0032] 132 Limiting gap

[0033] 14 Drag Block

[0034] 141 First limit slider

[0035] 142 Second limiting chute

[0036] 143 jack

[0037] 144 limiting boss

[0038] 15. Switch

[0039] 16 Travel limit block

[0040] 17 Spring

[0041] 2 male model

[0042] 3. First master mold

[0043] 4 Second master mold [Specific implementation method]

[0044] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail with reference to the following specific embodiments and the accompanying drawings.

[0045] See also Figure 1 、 Figure 2 and Figure 3, which is a perspective exploded view of the first preferred embodiment of the present invention, along with a schematic and cross-sectional view of its assembled structure. As shown in these figures, the secondary action slider structure 1 of the two-shot injection molding machine of the present invention is movably mounted within a male mold 2. The two-shot injection molding machine is equipped with a single-shot female mold 3 and a two-shot female mold 4, allowing the first and second female molds 3 and 4 to be closed relative to the male mold 2 according to the manufacturing process. The secondary action slider structure 1 includes a pair of slider pressure plates 11, a molding slider 12, a fixed guide block 13, a drag block 14, and a shutter 15.

[0046] A pair of slider pressure plates 11 are symmetrically spaced apart on the male mold 2, forming a sliding space 111 between the two slider pressure plates 11 and the male mold 2. It should be noted that each slider pressure plate 11 has two fixing holes 112 for two fixing screws 113 to be screwed onto the male mold 2, and a recess 114 is provided on each slider pressure plate 11 opposite the molding slider 12 and the multiple fixing screws 1113.

[0047] The forming slider 12 is limitedly set in the sliding space 111 below the pair of slider pressure plates 11, and the bottom of the two side surfaces of the forming slider 12 corresponds to the sliding space 111 and is respectively provided with a flange 121, so that each flange 121 can be movably set in each recess 114. In addition, a first limiting sliding groove 122 is provided on the rear side of the forming slider 12, and a supporting portion 123 for forming is provided on the front side of the forming slider 12.

[0048] The fixed guide block 13 is spaced apart on one side of the forming slider 12 and is fixed to the surface of the male mold 2 . A second limiting slider 131 is provided on the front side of the fixed guide block 13 , and the extension direction of the second limiting slider 131 is perpendicular to the surface of the male mold 2 .

[0049] The front side of the drag block 14 is provided with a first limiting slider 141 corresponding to the first limiting slide groove 122, and the rear side thereof is provided with a second limiting slide groove 142 corresponding to the second limiting slide groove 131, so as to limit the drag block 14 between the forming slider 12 and the fixed guide block 13, and a socket 143 is provided on the top surface of the drag block 14; it should be noted that the cross-sectional shape of the first limiting slider 141 and the second limiting slider 131 is T-shaped, and the first limiting slide groove 122 is a T-shaped groove corresponding to the shape of the first limiting slider 141, and the second limiting slide groove 142 is a T-shaped groove corresponding to the shape of the second limiting slider 131, and the first limiting slider 131 and the first limiting slide groove 122 are inclined, and the joining line of the first limiting slider 131 and the first limiting slide groove 122 has an angle of 60 degrees to 75 degrees with the surface of the male mold 2. A pair of limiting bosses 144 are provided on one surface of the drag block 14 corresponding to the second limiting groove 142. As shown in the figure, multiple limiting bosses 144 are provided at the bottom of the drag block 14, and a pair of limiting notches 132 are provided on the fixed guide block 13 corresponding to the pair of limiting bosses 144, so that a pair of limiting bosses 145 are respectively located in the pair of limiting notches 132, and the length of the pair of limiting notches 132 corresponds to the upward movement stroke of the drag block 14.

[0050] The shutter 15 is made of rubber, one end of which is mounted in the two-shot mold, and the shutter 15 is positioned corresponding to the insertion hole 143 .

[0051] In addition, the secondary action slider structure 1 of the two-color injection molding machine of the present invention further includes a stroke limit block 16 and a spring 17, and an original positioning point 124 and a separation positioning point 125 are correspondingly provided on the bottom surface of the molding slider 12. The stroke limit block 16 is protruded from the surface of the male mold 2 by the spring 17, so that the stroke limit block 16 is positioned within the original positioning point 124 or the separation positioning point 125 according to the movement of the molding slider 12.

[0052] Accordingly, when the first-shot female mold 3 and the male mold 2 are closed, since the first-shot female mold 3 is not provided with the shutter 15, the molding slide 12 will not move when the first shot is opened; then, when the second-shot female mold 4 and the male mold 2 are closed, the shutter 15 of the second female mold 4 will be inserted into the insertion hole 143. After the molds are separated, the shutter 15 drives the drag block 14 to move upward along the second limiting slide groove 142 and the second limiting slide block 131, and the molding slide block 12 is driven to move horizontally backward by the interaction of the first limiting slide groove 122 and the first limiting slide block 141, so that the molding slide block 12 leaves its original position, so that when the closing and opening actions of the first and second shots are performed, the molding slide block 12 will produce the action of not retreating once but retreating twice, thereby ensuring that the pre-compression effect required by the second-shot female mold 4 can be achieved and the molding quality can be improved.

[0053] Although the embodiments of the present application have been disclosed with reference to the above embodiments, the present application is not limited to the above embodiments. It will be apparent to those skilled in the art that various modifications, substitutions and changes can be made thereto without departing from the spirit and scope of the present application as set forth in the claims below. Therefore, the scope of the present application should be limited only by the scope of the claims below.

Claims

1. A secondary action slider structure of a two-color injection molding machine, movably mounted in a male mold, and the two-color injection molding machine is provided with a first-shot female mold and a second-shot female mold, so that the first-shot female mold and the second-shot female mold are clamped with respect to the male mold according to the manufacturing process, characterized in that: The secondary action slider structure of the two-color injection molding machine includes: A pair of slider pressing plates are symmetrically arranged on the male mold so as to form a sliding space between the two slider pressing plates and the male mold; a forming slider movably disposed in the sliding space, and a flange is provided on each side of the forming slider for limiting positioning below the pair of slider pressure plates, and a first limiting sliding groove is provided on the rear side of the forming slider; a fixed guide block, spaced apart and arranged on one side of the forming slider; a second limiting slider is provided on the front side of the fixed guide block, and an extending direction of the second limiting slider is perpendicular to the male mold; a drag block, having a first limiting sliding block provided on its front side corresponding to the first limiting sliding groove, and a second limiting sliding groove provided on its rear side corresponding to the second limiting sliding block, so as to limit the drag block between the forming sliding block and the fixed guide block, and a socket provided on the top surface of the drag block; and a shutter installed in the two-shot female mold, and the shutter is arranged corresponding to the position of the insertion hole; accordingly, when the one-shot female mold and the male mold are clamped, because the one-shot female mold is not provided with the shutter, the molding slide does not move during the one-shot mold opening; and when the two-shot female mold and the male mold are clamped, the shutter of the two-shot female mold is inserted into the insertion hole. After the molds are separated, the shutter drives the drag block to move upward along the second limiting slide groove and the second limiting slide block, and the molding slide is driven to move backward horizontally by the interaction between the first limiting slide groove and the first limiting slide block, so that the molding slide leaves its original position; The first limiting slider and the second limiting slider are T-shaped, the first limiting sliding groove is a T-shaped groove corresponding to the shape of the first limiting slider, and the second limiting sliding groove is a T-shaped groove corresponding to the shape of the second limiting slider; The first limiting slider and the first limiting slot are arranged obliquely, and an angle of 60 to 75 degrees is formed between a joining line between the first limiting slider and the first limiting slot and the surface of the male mold; A pair of limiting bosses are provided on one surface of the drag block corresponding to the second limiting slide groove, and a pair of limiting notches are provided on the fixed guide block corresponding to the pair of limiting bosses, so that the pair of limiting bosses are respectively located in the pair of limiting notches, and the length of the pair of limiting notches corresponds to the upward movement stroke of the drag block.

2. The secondary action slider structure of the two-color injection molding machine according to claim 1, characterized in that: The shutter is made of rubber.

3. The secondary action slider structure of the two-color injection molding machine according to claim 1, characterized in that: The front side of the forming slide block is provided with a supporting portion for forming.

4. The secondary action slider structure of the two-color injection molding machine according to claim 1, characterized in that: Each slider pressing plate is provided with two fixing holes for being screwed and fixed on the male mold, and each slider pressing plate is provided with a recess corresponding to each flange so that each flange can be movably arranged in each recess.

5. The secondary action slider structure of the two-color injection molding machine according to claim 1, characterized in that: It also has a stroke limit block and a spring, and an original positioning point and a separation positioning point are correspondingly arranged on the bottom surface of the forming slider. The stroke limit block is protruded from the surface of the male mold through the spring, so that the stroke limit block is positioned at the original positioning point or the separation positioning point according to the movement of the forming slider.

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