Positioning sliding block mechanism for double-color injection mold

Abstract

The utility model discloses a positioning slide block mechanism for a double-color injection mold, which comprises a pair of positioning modules arranged in mirror symmetry, and each positioning module is provided with a fixed frame seat and a slide block seat movably arranged in the fixed frame seat; the fixed frame seat is composed of a pair of side ribs arranged in parallel at intervals and a sealing plate jointly connected to the side ends of the pair of side ribs, the sliding block seat is installed between the pair of side ribs in a matched mode in a sliding mode, the top end of the sliding block seat is inwards provided with an installation cavity, a guide block is embedded in the installation cavity, and the middle of the guide block is inwards sunken to form an inverted-triangle-shaped insertion groove; a transverse spring piece is arranged on the outer side of the sliding block base, an extending part is outwards arranged in the middle of the inner side of the sliding block base, a chuck part is outwards arranged on the lower portion of the other side of the extending part, an arc-shaped clamping part is formed at the head end of the chuck part, and the bottom face of the head end of the chuck part is sunken to form a step groove matched with the arc-shaped clamping part. According to the positioning sliding block structure, the practicability and the product forming quality are improved when double-color injection molding work is carried out on circular cambered surface parts.

Description

Technical Field

[0001] The utility model relates to the technical field of double-color injection molds, in particular to a positioning slider mechanism for double-color injection molds. Background Art

[0002] The injection molding industry has penetrated into every aspect of life, which has led to a growing market demand for injection molding. The two-color injection molding process is also a type of injection molding. It uses two sets of injection molds and two plastic materials to be molded twice on the same injection molding machine, and the product is only ejected once. Since this process can make the product's appearance more beautiful and easy to change colors without spraying, the two-color injection molds that match this process are also becoming increasingly popular in the market.

[0003] When a two-color injection mold is used to mold certain specific shapes of products (such as circular arc products), it is necessary to ensure that the first-color product remains stationary during the mold opening action after the injection molding is completed. If the positioning is not good, the first-color product cannot cooperate well with the second-color mold, and the injection molding of the second-color product cannot be completed smoothly. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a positioning slider mechanism for a two-color injection mold, which has a simple structural layout and can easily achieve a fixing effect on the first color product.

[0005] To achieve the above purpose, the present invention adopts the following contents:

[0006] The utility model provides a positioning slider mechanism for a double-color injection mold, which includes a pair of positioning modules arranged in mirror symmetry, wherein the positioning modules have a fixed frame seat and a slider seat movably arranged in the fixed frame seat;

[0007] The fixed frame seat is composed of a pair of parallel and spaced side ribs and a sealing plate connected to the side ends of the pair of side ribs. The slider seat is slidably mounted between the pair of side ribs. The top end of the slider seat is provided with an installation cavity inwardly, in which a guide block is embedded. The middle of the guide block is recessed inwardly to form an inverted triangular slot.

[0008] A transverse spring member is provided on the outer side of the slider seat, and the other end of the transverse spring member is connected to the sealing plate. An extension portion is provided outwardly in the middle of the inner side of the slider seat, and a clamping portion is provided outwardly at the lower part of the other side of the extension portion. The head end of the clamping portion forms an arc-shaped clamping portion, and the bottom surface of the head end of the clamping portion is recessed to form a step groove that matches the arc-shaped clamping portion.

[0009] According to the present invention, a positioning slider mechanism for a two-color injection mold is provided. The inner wall of the arc-shaped clamping portion is provided with several anti-slip grooves arranged vertically. The anti-slip grooves provide reliable friction, preventing the arc-shaped clamping portion from slipping when clamping the first-color product.

[0010] According to the positioning slider mechanism for a two-color injection mold provided by the utility model, the inner wall of the step groove is configured as an arc-shaped fitting surface, which forms a better locking effect with the side wall of the product to provide a clamping and positioning effect.

[0011] According to the present invention, a positioning slider mechanism for a two-shot injection mold is provided. An L-shaped retaining plate is provided in the middle of the inner wall of the side ribs, and a corresponding outwardly protruding sliding abutment is provided on the side of the slider seat. The sliding abutment slides in contact with the L-shaped retaining plate. A base is provided below the pair of side ribs, and the base and the slider seat are in frictional contact. Thus, the sliding abutment is clamped between the L-shaped retaining plate and the base, and can undergo forward and backward translational motion under the action of an external force, while the forward and backward displacement of the slider seat does not cause up and down jitter.

[0012] Furthermore, the guide block is shorter than the mounting cavity, and a limit plate is provided at the bottom of the mounting cavity to surround both sides of the guide block's bottom. This allows the guide block to move forward and backward within the mounting cavity under external force, and the limit plate prevents significant shaking during this movement.

[0013] Furthermore, a top block is embedded in the middle of the base so that it can move up and down. A vertical spring member is provided at the bottom of the top block. The top outer side of the top block is configured as a first inclined surface. A raised portion is provided on one side of the bottom end of the guide block. The inner side of the raised portion is configured as a second inclined surface. The second inclined surface has an angle consistent with that of the first inclined surface. The sliding contact between the first and second inclined surfaces of the top block ensures that the guide block does not loosen during the mold closing process.

[0014] Compared with the prior art, the present invention has the following technical effects: the present invention has a simple structure and a reasonable design. The wedge block of the ejection mechanism in the first color mold gradually fits in with the guide block downwards. During the fitting process, the guide block will be laterally deflected, thereby driving the slider seat to move outwards to facilitate the injection molding of the first color product. After the injection molding is completed, the mold is opened, the wedge block and the guide block are separated, and under the action of the transverse spring member, the slider seat moves inwards, and the arc-shaped clamping part at the head end of the clamping head clamps the side end of the circular arc surface product, thereby ensuring that the first color injection molded product remains stationary before the second color mold is closed. The positioning slider structure of the present invention improves the practicality and product molding quality of double-color injection molding of circular arc surface parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is an overall schematic diagram of a positioning slider mechanism for a two-color injection mold according to an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the embodiment of the utility model regarding the fixed frame seat and the slider seat;

[0018] Figure 3 This is an exploded schematic diagram of a positioning module according to an embodiment of the present invention;

[0019] Figure 4 It is a partial schematic diagram of the clamping part of an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the guide block and the top block according to an embodiment of the present invention;

[0021] Figure 6 This is a simplified cross-sectional schematic diagram of the positioning module when a two-color injection mold is closed according to an embodiment of the present invention;

[0022] 1-positioning module, 2-wedge block, 3-single-color injection molding product; 10-fixed frame seat, 20-slider seat, 30-base, 101-L-shaped bayonet, 110-side rib, 120-sealing plate, 201-installation cavity, 202-transverse spring member, 203-limiting plate, 204-sliding abutment portion, 210-guide block, 211-inverted triangle slot, 212-protrusion, 213-second inclined surface, 220-extension portion, 230-clamping portion, 231-arc-shaped clamping portion, 232-anti-slip groove, 233-step groove, 310-top block, 311-vertical spring member, 312-first inclined surface. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the following specific description is illustrative rather than restrictive and should not limit the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] See also Figures 1 to 6 As shown. The embodiment of the present invention proposes a positioning slider mechanism for a two-color injection mold. Based on the improved design of a conventional two-color injection mold, a positioning slider mechanism is designed. It is mainly aimed at circular arc products, such as a certain car logo product (Volkswagen car logo). During the injection molding process, the product will be divided into a single-color product and a two-color product, which are molded separately. The final finished product is a combination of the single-color product and the two-color product. However, since the single-color product is a circular arc mechanism, the current positioning structure in the mold cannot effectively keep the single-color product still after the injection molding is completed, resulting in the inability to complete the injection molding of the two-color product.

[0026] Based on the above problems, the inventors designed a positioning slider mechanism for a two-color injection mold, which mainly includes a pair of positioning modules 1 arranged in a mirror-symmetrical manner. Through this pair of positioning modules 1, the positioning effect of the single-color injection molded product 3 located between them is achieved. The positioning module 1 has a fixed frame seat 10 and a slider seat 20 movably arranged in the fixed frame seat 10, that is, the slider seat 20 can move horizontally relative to the fixed frame seat 10 in the direction close to or away from the single-color injection molded product 3.

[0027] The fixed frame seat 10 is composed of a pair of parallel and spaced side ribs 110 and a sealing plate 120 connected to the side ends of the pair of side ribs 110. The slider seat 20 is slidably installed between the pair of side ribs 110. The top of the slider seat 20 is provided with an installation cavity 201 inwardly, and a guide block 210 is embedded in the installation cavity 201. The middle of the guide block 210 is recessed inwardly to form an inverted triangular slot 211. The shape of this inverted triangular slot 211 matches the wedge block 2 of the ejection mechanism in the two-color injection mold, and the wedge block 2 can fit downwardly with the inverted triangular slot 211.

[0028] A transverse spring member 202 is provided on the outer side of the slider seat 20, and the other end of the transverse spring member 202 is connected to the sealing plate 120. An extension portion 220 is provided outwardly from the middle of the inner side of the slider seat 20, and a clamping portion 230 is provided outwardly from the lower part of the other side of the extension portion 220. The head end of the clamping portion 230 forms an arc-shaped clamping portion 231, and the bottom surface of the head end of the clamping portion 230 is recessed to form a step groove 233 that cooperates with the arc-shaped clamping portion 231.

[0029] During operation, when the first color product is being injected, the mold is in a closed state, that is, the wedge is fitted with the inverted triangle slot, and the wedge exerts a horizontal outward force on the guide block, so that the guide block drives the slider seat to deflect outward. At this time, the arc-shaped clamping part at the head end of the chuck head will not contact the first color injection molded product; and when the mold is opened, the wedge will move upward with the movable mold, and the wedge will gradually separate from the inverted triangle slot. At this time, under the action of the transverse spring part, the slider seat will gradually move inward until the arc-shaped clamping part and the step groove at the head end of the chuck head can contact the side of the first color injection molded product, thereby realizing the clamping and positioning of both ends of the first color injection molded product, ensuring that the first color injection molded product remains stationary during the subsequent cooperation with the second color mold.

[0030] The inner wall of the arc-shaped clamping portion 231 is provided with several anti-slip grooves 232 arranged in an upper and lower arrangement. The anti-slip grooves provide reliable friction to prevent the arc-shaped clamping portion from slipping when clamping the first color product.

[0031] In addition, the inner wall of the step groove 233 is configured as an arc-shaped fitting surface. The upper edge of the first-color injection molded product presents a step effect, utilizing the arc-shaped fitting surface to form a better engagement with the product side wall, providing a clamping and positioning effect.

[0032] In one embodiment, an L-shaped retaining hole 101 is provided in the middle of the inner wall of the side rib 110, and a corresponding outwardly protruding sliding abutment 204 is provided on the side of the slider seat 20. The sliding abutment 204 slides with the L-shaped retaining hole 101. A base 30 is provided below and between the pair of side ribs 110, and the base 30 is in frictional contact with the slider seat 20. In this way, the sliding abutment is clamped between the L-shaped retaining hole and the base, and can undergo forward and backward translational motion under the action of external force, without causing up and down jitter during the forward and backward displacement of the slider seat.

[0033] Furthermore, the length of the guide block 210 is shorter than that of the mounting cavity 201. A stop plate 203 is provided at the bottom of the mounting cavity 201 to enclose both sides of the bottom of the guide block 210. This allows the guide block to move back and forth within the mounting cavity under external force to accommodate the movement of the wedge, achieving a flexible engagement between the two. Furthermore, the stop plate prevents significant shaking during the guide block's movement.

[0034] A top block 310 is embedded in the middle of the base 30, allowing it to move vertically. A vertical spring member 311 is installed at the bottom of the top block 310. The top outer side of the top block 310 is configured as a first inclined surface 312. A raised portion 212 is provided on one side of the bottom end of the guide block 210. The inner side of the raised portion 212 is configured as a second inclined surface 213, which has the same inclination angle as the first inclined surface 312. The sliding contact between the first and second inclined surfaces of the top block ensures that the guide block does not loosen during the mold closing process.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A positioning slider mechanism for a two-color injection mold, comprising a pair of positioning modules arranged in mirror symmetry, characterized in that: The positioning module comprises a fixed frame seat and a slider seat movably arranged in the fixed frame seat; The fixed frame seat is composed of a pair of parallel and spaced side ribs and a sealing plate connected to the side ends of the pair of side ribs. The slider seat is slidably mounted between the pair of side ribs. The top end of the slider seat is provided with an installation cavity inwardly, in which a guide block is embedded. The middle of the guide block is recessed inwardly to form an inverted triangular slot. A transverse spring member is provided on the outer side of the slider seat, and the other end of the transverse spring member is connected to the sealing plate. An extension portion is provided outwardly in the middle of the inner side of the slider seat, and a clamping portion is provided outwardly at the lower part of the other side of the extension portion. The head end of the clamping portion forms an arc-shaped clamping portion, and the bottom surface of the head end of the clamping portion is recessed to form a step groove that matches the arc-shaped clamping portion.

2. A positioning slider mechanism for a two-color injection mold according to claim 1, characterized in that: The inner wall of the arc-shaped clamping portion is provided with several anti-slip grooves arranged in an up-and-down manner.

3. A positioning slider mechanism for a two-color injection mold according to claim 1, characterized in that: The inner wall of the step groove is configured as an arc-shaped fitting surface.

4. A positioning slider mechanism for a two-color injection mold according to claim 1, characterized in that: An L-shaped bayonet is provided in the middle of the inner wall of the side rib, and a sliding abutment portion protruding outward is provided on the side of the slider seat. The sliding abutment portion slides in cooperation with the L-shaped bayonet. A base is provided below between a pair of the side ribs, and the base is in frictional contact with the slider seat.

5. A positioning slider mechanism for a two-color injection mold according to claim 4, characterized in that: The length of the guide block is smaller than the length of the installation cavity, and a limiting plate for surrounding two sides of the bottom of the guide block is provided at the lower part of the installation cavity.

6. A positioning slider mechanism for a two-color injection mold according to claim 5, characterized in that: A top block is embedded in the middle of the base so as to be movable up and down, a vertical spring member is provided at the bottom end of the top block, the outer side of the top end of the top block is configured as a first inclined surface, a protrusion is provided on one side of the bottom end of the guide block, the inner side of the protrusion is configured as a second inclined surface, and the inclination angle of the second inclined surface is consistent with that of the first inclined surface.

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