Injection mold for thin-wall type wall switch panel

Abstract

An injection mold of a thin-wall type wall switch panel comprises a front mold frame bottom plate, a front mold frame, a rear mold frame, an ejector pin fixing plate and a rear mold frame bottom plate, a rear mold core is arranged in the rear mold frame, and a front mold core matched with the rear mold core is arranged in the front mold frame. A plurality of forming stations, a main runner located in the middle of the rear mold core and extending in the length direction of the rear mold core and branch runners communicated with the main runner and the corresponding forming stations are arranged in the rear mold core, the forming stations are provided with protruding blocks extending upwards, and pouring gates are arranged between the protruding blocks and the branch runners; the pouring gate communicates with a drainage groove formed in the protruding block, and the drainage groove is used for increasing the flowing speed of an injection molding material flowing through the drainage groove. The injection mold has the beneficial effects that after injection molding materials enter a forming gap, the flowing speed of the injection molding materials is accelerated through the flow guide effect of the flow guide grooves, so that the injection molding speed is higher, and the forming gap is easier to be filled with glue, thereby reducing the probability of glue shortage and improving the percent of pass.

Description

Technical Field

[0001] The utility model relates to the field of panel switch production equipment, in particular to an injection mold for a thin-wall wall switch panel. Background Art

[0002] Panel switches are installed on the wall through a base and a panel, and are widely used in homes, factories and other fields.

[0003] The existing thin-wall switch panel has a large area, which leads to the problem of glue shortage during injection molding, that is, the glue in the mold cannot flow, resulting in the problem of injection molding, resulting in a decrease in the qualified rate. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides an injection mold of a thin-wall wall switch panel to solve the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve its technical problems: the injection mold of the thin-wall wall switch panel comprises a front mold frame bottom plate, a front mold frame, a rear mold frame, a pin fixing plate, and a rear mold frame bottom plate, a rear mold core is arranged in the rear mold frame, a front mold core matched with the rear mold core is arranged in the front mold frame, a plurality of molding stations distributed in a rectangular array are arranged in the rear mold core, a main flow channel located at the center of the rear mold core and extending along the length direction of the rear mold core, and a branch flow channel connected with the main flow channel and connected with the corresponding molding station, the molding station has a protrusion extending upward, a gate is arranged between the protrusion and the branch flow channel, the gate is connected with a drainage groove arranged on the protrusion, and the drainage groove is used to accelerate the circulation speed of the injection molding material flowing through.

[0006] Further improvement, the drainage groove includes two guide blocks arranged on the upper surface of the protrusion and symmetrically distributed to form a spacing, and a guide surface with guiding properties and used to accelerate the flow speed of the injection molding material flowing through is arranged on one side of the guide block close to the spacing.

[0007] According to a further improvement, the guide surface has a slope, and the amplitude of the slope gradually increases from the upper surface of the guide block to the upper surface of the protrusion.

[0008] For further improvement, the guide surface has an inwardly recessed groove at a center position on a side close to the spacing interval, and has an outwardly protruding protrusion at a center position on a side away from the spacing interval.

[0009] To be further improved, the gate has a feed port, a discharge port, and a guide channel connecting the two. The feed port is located at the molding station and is connected to the branch channel. The discharge port is located at the protrusion and is placed in the molding gap formed between the rear mold core and the front mold core.

[0010] For further improvement, an assembly slot for placing the gate is provided between the protrusion and the molding station.

[0011] The beneficial effects of the utility model are:

[0012] The utility model can accelerate the circulation speed of the injection molding material through the guiding effect of the drainage groove after the injection molding material enters the molding gap, so that the injection molding speed is faster and the colloid is more likely to fill the molding gap, thereby reducing the probability of glue shortage and improving the qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the rear mold frame of the utility model, in which part of the front mold core is retained;

[0015] Figure 3 For this utility model Figure 2 A partial enlarged schematic diagram of part A;

[0016] Figure 4 It is a structural schematic diagram of the gate of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Referring to the accompanying drawings: the injection mold of this thin-walled wall switch panel includes a front mold frame base plate 1, a front mold frame 2, a rear mold frame 3, a pin fixing plate 4, and a rear mold frame base plate 5. A rear mold core 6 is arranged in the rear mold frame 3, and a front mold core cooperating with the rear mold core 6 is arranged in the front mold frame 2. The rear mold core 6 is provided with a plurality of molding stations 61 distributed in a rectangular array, a main flow channel located at the center of the rear mold core 6 and extending along the length direction of the rear mold core 6, and a branch flow channel connected to the main flow channel and connected to the corresponding molding station 61. The molding station 61 has an upwardly extending protrusion 61-a, and a gate 7 is arranged between the protrusion 61-a and the branch flow channel. The gate 7 is connected to a drainage groove 8 arranged on the protrusion 61-a, and the drainage groove 8 is used to accelerate the circulation speed of the injection molding material flowing through. The principle of the utility model is that the injection molding material first enters the main channel, and then the branch channel diverts the injection molding material entering the main channel, that is, diverts it to the corresponding gate 7, and then the injection molding material enters the molding gap formed by the front mold core and the rear mold core 6 through the gate 7 (that is, the protrusion 61-a of the rear mold core 6 is used as a molding module, and the front mold core has an insert cavity adapted to the protrusion, and the insert cavity is used as a molding cavity). When the injection molding material enters the molding gap, it will spread to the top of the protrusion 61-a as the filling amount increases, and when it spreads to the top of the protrusion 61-a, it will flow through the drainage groove 8. The function of the drainage groove 8 is to speed up the circulation speed of the injection molding material, so that the injection molding speed is faster, and the colloid is more likely to fill the molding gap, thereby reducing the probability of glue shortage and improving the qualified rate.

[0019] The drainage groove 8 includes two guide blocks 81 which are arranged on the upper surface of the protrusion 61-a and are symmetrically distributed to form an interval. A guide surface 81-a with guiding properties and used to accelerate the flow speed of the injection molding material flowing through is arranged on the side of the guide block 81 close to the interval. The guide block 81 is used to increase the height of the upper surface of part of the protrusion 61-a, and the guide block 81 is formed at the same time as the protrusion 61-a is formed. The guide block 81 also uses its own thickness to form the guide surface 81-a. The guide surface 81-a has a guiding effect, which guides the injection molding material flowing through to flow to the interval, that is, the injection molding material is dispersedly guided, so that the injection molding material can quickly fill the molding gap, thereby reducing the probability of glue shortage and improving the qualified rate.

[0020] The guide surface 81-a has a slope, and the amplitude of the slope gradually increases from the upper surface of the guide block 81 to the upper surface of the protrusion 61-a, and the slope has an inclination angle, so that the guide surface 81-a is also an inclined surface. The setting of the inclination angle also makes the guide surface 81-a have a highest point and a lowest point, and the upper surface of the guide block 81 is used as the highest point, and the upper surface of the protrusion 61-a is used as the lowest point, so that the injection molding material that first passes through the upper surface of the guide block 81 is guided into the interval, thereby achieving the purpose of dispersed guidance, so that the injection molding material quickly fills the molding gap.

[0021] The guide surface 81-a has an inwardly recessed groove 81-a1 at the center position on the side close to the spacing gap, and has an outwardly protruding protrusion 81-a2 at the center position on the side away from the spacing gap. The groove 81-a1 is used to expand the size of the spacing gap, and through the groove 81-a1, the spacing gap can be closer to the highest point of the guide surface 81-a, and the function of the protrusion 81-a2 is to expand the size of the guide surface 81-a, so that the injection molding material placed on the guide block 81 can flow to the guide surface 81-a at the first time, thereby entering the space formed by the groove 81-a1 at the first time, and can also be quickly placed in the spacing gap.

[0022] The gate 7 has a feed port 71, a discharge port 72, and a guide channel 73 connecting the two. The feed port 71 is located at the molding station 61 and is connected to the branch channel. The discharge port 72 is located at the protrusion 61-a and is placed in the molding gap formed between the rear mold core 6 and the front mold core. The feed port 71 is used to guide the injection material from the branch channel to the gate 7, and the guide channel 73 is used to guide the injection material to the discharge port 72. The discharge port 72 allows the injection material to separate from the gate 7 and enter the molding gap, and the discharge port 7 2 has a smaller caliber than that of the feed port 71, so as to reduce the discharge amount of the injection material, so that the injection material can be quantitatively and orderly quickly fill the molding gap, thereby improving the molding quality of the switch panel, and the guide channel 73 is used to match the requirements of the front and rear offset settings of the discharge port 72 and the feed port 71. At the same time, the gate 7 is composed of two assembled blocks, so that the injection material remaining in the feed port 71, the discharge port 72, and the guide channel 73 can be cleaned, thereby ensuring the cleanliness of the gate 7.

[0023] An assembly slot 9 for placing the gate 7 therein is provided between the protrusion 61-a and the molding station 61. The assembly slot 9 is used to set the gate 7, so that the gate 7 is replaceable. The gate 7 can be replaced with a new one after it is worn out. Compared with the traditional method of fixing the gate, the mold is less worn out and the cost is reduced.

[0024] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An injection mold for a thin-walled wall switch panel, comprising a front mold base plate (1), a front mold base (2), a rear mold base (3), an ejector pin fixing plate (4), and a rear mold base plate (5), characterized in that: A rear mold core (6) is arranged in the rear mold frame (3), a front mold core cooperating with the rear mold core (6) is arranged in the front mold frame (2), a plurality of molding stations (61) distributed in a rectangular array are arranged in the rear mold core (6), a main flow channel located at the center of the rear mold core (6) and extending along the length direction of the rear mold core (6), and a branch flow channel connected to the main flow channel and connected to the corresponding molding station (61), the molding station (61) has an upwardly extending protrusion (61-a), a gate (7) is arranged between the protrusion (61-a) and the branch flow channel, the gate (7) is connected to a drainage groove (8) arranged on the protrusion (61-a), and the drainage groove (8) is used to accelerate the flow speed of the injection molding material flowing through.

2. The injection mold for the thin-walled wall switch panel according to claim 1, characterized in that: The drainage groove (8) comprises two guide blocks (81) arranged on the upper surface of the protrusion (61-a) and symmetrically distributed to form a spacing, and a guide surface (81-a) having a guiding property and used to accelerate the flow speed of the injection molding material flowing through is arranged on one side of the guide block (81) close to the spacing.

3. The injection mold for the thin-walled wall switch panel according to claim 2, characterized in that: The guide surface (81-a) has a slope, and the amplitude of the slope gradually increases from the upper surface of the guide block (81) to the upper surface of the protrusion (61-a).

4. The injection mold for the thin-walled wall switch panel according to claim 3, characterized in that: The guide surface (81-a) has an inwardly recessed groove (81-a1) at a center position on a side close to the spacing interval, and has an outwardly protruding protrusion (81-a2) at a center position on a side away from the spacing interval.

5. The injection mold for the thin-walled wall switch panel according to claim 1, characterized in that: The gate (7) has a feed port (71), a discharge port (72), and a guide channel (73) connecting the two, the feed port (71) being located at the molding station (61) and communicating with the branch channel, and the discharge port (72) being located at the protrusion (61-a) and disposed in a molding gap formed between the rear mold core (6) and the front mold core.

6. The injection mold for the thin-walled wall switch panel according to claim 5, characterized in that: An assembly slot (9) for the gate (7) to be placed therein is provided between the protrusion (61-a) and the molding station (61).

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