Wall switch panel injection mold free of material spraying

Abstract

A wall switch panel injection mold free of material spraying 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 branch runners communicating with the main runner and the corresponding forming stations are arranged in the rear mold core, pouring units serving as sprues are arranged between the branch runners and the forming stations, and the flowing length of injection molding materials reaching forming gaps from the branch runners is prolonged. The forming station is provided with two expansion grooves which are symmetrically distributed on the two sides of the pouring unit and serve as a part of the pouring gate. The pouring gate has the beneficial effects that the flowing length of injection molding materials is prolonged by utilizing the pouring unit, and the usable area of the pouring gate is increased by utilizing the expansion slot, so that the injection molding materials are not easy to accumulate, and the probability of generating flow lines is reduced.

Description

Technical Field

[0001] The utility model relates to the field of panel switch production equipment, in particular to an injection mold for a wall switch panel free of spraying materials. 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 switch panels made of existing spray-free materials are prone to flow lines, resulting in unqualified product quality. This happens mainly because the gates on the mold are generally small rectangular gates, which causes the injection material entering the molding gap to accumulate, affecting the flow and thus causing flow lines. Utility Model Content

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

[0005] The utility model adopts a technical solution to solve the technical problem: the injection mold of the wall switch panel without spraying material 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, a casting unit serving as a gate is arranged between the branch flow channel and the molding station, the casting unit is used to guide the injection molding material to the molding gap formed between the rear mold core and the front mold core, and to extend the flow length of the injection molding material when it reaches the molding gap from the branch flow channel, and the molding station is provided with two expansion grooves symmetrically distributed on both sides of the casting unit and serving as part of the gate.

[0006] For further improvement, a protrusion extending upward is provided at the center of the forming station, an assembly slot for the casting unit to be placed therein is provided between the protrusion and the forming station, and two expansion slots are symmetrically distributed on both sides of the assembly slot.

[0007] Further improvement, the casting unit includes two mutually assembled blocks, the upper end of the assembled block is in a step configuration and has an assembled base surface, the assembled base surface is provided with a feed port located on a low-order surface, a discharge port located on a high-order surface, and a guide channel for guiding the injection molding material from the feed port to the discharge port via a guiding direction.

[0008] Further improvement, the guide channel includes a first guide channel, a second guide channel, and a turning channel from the first guide channel to the second guide channel via a turning direction according to the guide direction. The first guide channel is connected to the feed port, and the second guide channel is connected to the discharge port.

[0009] Further improvement, the turning channel has a front section of the turning channel, a middle section of the turning channel and a rear section of the turning channel, the turning direction corresponding to the front section of the turning channel is consistent with the guiding direction of the first guide channel, the turning direction corresponding to the rear section of the turning channel is consistent with the guiding direction of the second guide channel, and the middle section of the turning channel changes the guiding direction from the guiding direction of the first guide channel to the guiding direction of the second guide channel.

[0010] For further improvement, the upper inner surface of the guide channel is an arc-shaped surface, which gradually reduces the channel spacing between the first guide channel, the turning channel, and the second guide channel according to the change of the curvature, and the reduction of the channel spacing from the first guide channel to the turning channel and from the turning channel to the second guide channel is continuous and regular.

[0011] For further improvement, the assembly block is provided with a connection port for connecting the outlet of the branch channel and the feed port.

[0012] For further improvement, several groups of mold cooling pipes are arranged in the front mold frame.

[0013] The beneficial effects of the utility model are:

[0014] The utility model utilizes a casting unit to extend the flow length of the injection material and utilizes an expansion groove to increase the use area of ​​the gate, so that the injection material is not allowed to accumulate, thereby reducing the probability of generating flow lines, and by reducing the discharge amount of the injection material in a quantitative and orderly manner, the molding gap can be quickly filled, thereby improving the molding quality of the switch panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the rear mold frame of the utility model;

[0017] Figure 3 It is a schematic diagram of the full cross-section structure of the side of the utility model, in which the front mold frame bottom plate, the front mold frame, and the mold cooling pipe are hidden;

[0018] Figure 4 For this utility model Figure 3 A partial enlarged schematic diagram of part A;

[0019] Figure 5 It is a structural schematic diagram of the splicing block of the utility model;

[0020] Figure 6 This is a schematic structural diagram of the rear mold frame of the utility model, used to display the mold cooling pipe. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Referring to the accompanying drawings: This spray-free material wall switch panel injection mold 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. A plurality of molding stations 61 distributed in a rectangular array are arranged in the rear mold core 6, a main channel 62 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 channel 63 connected to the main channel 62 and connected to the corresponding molding station 61, a casting unit 7 serving as a gate is arranged between the branch channel 63 and the molding station 61, the casting unit 7 is used to guide the injection molding material to the molding gap formed between the rear mold core 6 and the front mold core, and to extend the flow length of the injection molding material when it reaches the molding gap from the branch channel 63, and the molding station 61 is provided with two expansion grooves 61-b symmetrically distributed on both sides of the casting unit 7 and serving as part of the gate. The principle of the utility model is that the injection molding material delivered by the injection molding machine is received by the main channel 62, and the injection molding material existing on the main channel 62 is diverted to the corresponding casting unit 7 by the branch channel 63, and then the casting unit 7 guides the injection molding material to the molding gap formed between the rear mold core 6 and the front mold core, and by extending the flow length of the injection molding material and expanding the slot 61-b to increase the gate area, the injection molding material is not allowed to accumulate, thereby reducing the probability of flow lines. In this embodiment, there are four molding stations 61, which are arranged opposite to each other in pairs. In this way, combined with the central setting of the main channel, it can be located between the relative molding stations 61, so that the branch channel 63 of the same length can be connected with the corresponding molding station 61, which is also convenient for processing and molding.

[0023] An upwardly extending protrusion 61-a is provided at the center position of the molding station 61, and an assembly slot 8 for the casting unit 7 to be placed therein is provided between the protrusion 61-a and the molding station 61. The two extension slots 61-b are symmetrically distributed on both sides of the assembly slot 8. The protrusion 61-a makes the inner side surface of the switch panel have an installation cavity for setting electronic components. The assembly slot 8 is used to set the casting unit 7, so that the casting unit 7 is replaceable. The replaceability allows the casting unit 7 to be cleaned or replaced with a new one. Compared with the traditional method of fixing the gate, the mold loss is less and the cost is reduced.

[0024] The casting unit 7 includes two mutually assembled blocks 71, the upper end of the assembly block 71 is in a step configuration and has an assembly base surface 71-a, and the assembly base surface 71-a is provided with a feed port 71-a1 located on a low-step surface, a discharge port 71-a2 located on a high-step surface, and a guide channel 71-a3 for guiding the injection molding material from the feed port 71-a1 to the discharge port 71-a2 in a guiding direction. The feed port 71-a1 is used to guide the injection molding material distributed by the branch channel 63 into the casting unit 7. Firstly, the casting unit 7 is composed of two assembly blocks 71, which can reduce the difficulty of molding the feed port 71-a1, the discharge port 71-a2, and the guide channel 71-a3, and the step configuration at the upper end of the assembly block 71 is to meet There needs to be a height difference between the protrusion 61-a and the molding station 61, and it is also necessary to ensure that the position of the discharge port 71-a2 is within the molding gap, so that the injection molding material can enter the molding gap as soon as possible. The feed port 71-a1 is used to guide the injection molding material from the branch channel 63 to the casting unit 7, and the guide channel 71-a3 is used to guide the injection molding material to the discharge port 71-a2. The discharge port 71-a2 allows the injection molding material to separate from the casting unit 7 and enter the molding gap, and the caliber size of the discharge port 71-a2 is smaller than the caliber size of the feed port 71-a1, so that the discharge amount of the injection molding material can be reduced, so that the injection molding material is quantitatively and orderly quickly filled with the molding gap, thereby improving the molding quality of the switch panel.

[0025] The guide channel 71-a3 includes a first guide channel 71-a31, a second guide channel 71-a32, and a turning channel 71-a33 which reaches the second guide channel 71-a32 from the first guide channel 71-a31 via a turning direction. The first guide channel 71-a31 is connected to the feed port 71-a1, and the second guide channel 71-a32 is connected to the discharge port 71-a2. Such a setting is used to meet the change of direction from the feed port 71-a1 to the discharge port 71-a2. Although the two are on the same side, they are offset in the front and rear. Therefore, it is realized by the first guide channel 71-a31, the second guide channel 71-a32 and the turning channel 71-a33, and the total length of the route for the injection molding material to reach the molding gap can be extended, so that the amount of injection molding material entering can be ensured to be sufficient and plastic accumulation can be avoided.

[0026] The turning channel 71-a33 comprises a front section 71-a331 of the turning channel, a middle section 71-a332 of the turning channel and a rear section 71-a333 of the turning channel. The turning direction corresponding to the front section 71-a331 of the turning channel is consistent with the guiding direction of the first guiding channel 71-a31, the turning direction corresponding to the rear section 71-a333 of the turning channel is consistent with the guiding direction of the second guiding channel 71-a32, and the middle section 71-a332 of the turning channel changes the guiding direction from the guiding direction of the first guiding channel 71-a31 to the guiding direction of the second guiding channel. The guiding direction of the channel 71-a32, the front section 71-a331 of the turning channel, the middle section 71-a332 of the turning channel and the rear section 71-a333 of the turning channel are all arc sections, so that they can have continuity in connection with the first guide channel 71-a31 and the second guide channel 71-a32. The middle section 71-a332 of the turning channel is used to realize the change of direction so as to guide the injection molding material from the first guide channel 71-a31 to the second guide channel 71-a32, thereby realizing the injection molding material entering the molding gap from the discharge port 71-a2.

[0027] The upper inner surface of the guide channel 71-a3 is an arc-shaped surface, and the channel spacing between the first guide channel 71-a31, the turning channel 71-a33, and the second guide channel 71-a32 gradually decreases according to the change of the curvature, and the reduction change of the channel spacing from the first guide channel 71-a31 to the turning channel 71-a33 and from the turning channel 71-a33 to the second guide channel 71-a32 is continuous and regular. Such a setting can match the caliber size of the discharge port 71-a2, thereby achieving control of the discharge amount during discharge, avoiding excessive discharge amount that causes the injection molding material to accumulate in the molding gap, accelerating the flow effect of the injection molding material, and improving the molding quality of the switch panel.

[0028] The assembly block 71 is provided with a connection port 71 - b for connecting the outlet of the branch channel 63 and the feed port 71 - a1 . The configuration of the oblique opening 71 - b is consistent with the configuration of the branch channel 63 , so that the connection between the two can be continuous and no connection gap will be generated, so that the injection molding material will not leak when it is delivered to the casting unit 7 .

[0029] Several groups of mold cooling pipes 9 are arranged in the front mold frame 2. Since no spraying material is required, the mold needs to be heated to a higher injection temperature during injection molding, so the mold needs to be cooled. Therefore, the mold cooling pipes 9 are arranged to cool in a liquid cooling manner.

[0030] 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. A spray-free wall switch panel injection mold, 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 (62) 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 (63) connected to the main flow channel (62) and connected to the corresponding molding station (61), a casting unit (7) serving as a gate is arranged between the branch flow channel (63) and the molding station (61), the casting unit (7) is used to guide the injection molding material to the molding gap formed between the rear mold core (6) and the front mold core, and to extend the flow length of the injection molding material when it reaches the molding gap from the branch flow channel (63), and the molding station (61) is provided with two expansion grooves (61-b) symmetrically distributed on both sides of the casting unit (7) and serving as part of the gate.

2. The injection mold for the wall switch panel of the spray-free material according to claim 1, characterized in that: An upwardly extending protrusion (61-a) is provided at the center of the molding station (61), and an assembly slot (8) for the casting unit (7) to be placed therein is provided between the protrusion (61-a) and the molding station (61), and the two expansion slots (61-b) are symmetrically distributed on both sides of the assembly slot (8).

3. The injection mold for the wall switch panel of the spray-free material according to claim 2, characterized in that: The casting unit (7) comprises two mutually assembled blocks (71), the upper end of the assembled block (71) is in a step configuration and has an assembled base surface (71-a), and the assembled base surface (71-a) is provided with a feed port (71-a1) located on a low-step surface, a discharge port (71-a2) located on a high-step surface, and a guide channel (71-a3) for guiding the injection molding material from the feed port (71-a1) to the discharge port (71-a2) along a guide direction.

4. The injection mold for the wall switch panel of the spray-free material according to claim 3, characterized in that: The guide channel (71-a3) includes a first guide channel (71-a31), a second guide channel (71-a32), and a turning channel (71-a33) which reaches the second guide channel (71-a32) from the first guide channel (71-a31) via a turning direction according to the guiding direction. The first guide channel (71-a31) is connected to the feed port (71-a1), and the second guide channel (71-a32) is connected to the discharge port (71-a2).

5. The injection mold for the wall switch panel of the spray-free material according to claim 4, characterized in that: The turning channel (71-a33) comprises a front section (71-a331) of the turning channel, a middle section (71-a332) of the turning channel and a rear section (71-a333) of the turning channel. The turning direction corresponding to the front section (71-a331) of the turning channel is consistent with the guiding direction of the first guide channel (71-a31). The turning direction corresponding to the rear section (71-a333) of the turning channel is consistent with the guiding direction of the second guide channel (71-a32). The middle section (71-a332) of the turning channel changes the guiding direction from the guiding direction of the first guide channel (71-a31) to the guiding direction of the second guide channel (71-a32).

6. The injection mold for the wall switch panel of the spray-free material according to claim 5, characterized in that: The upper inner surface of the guide channel (71-a3) is an arc-shaped surface, and the channel spacing between the first guide channel (71-a31), the turning channel (71-a33), and the second guide channel (71-a32) gradually decreases according to the change of the curvature, and the reduction change of the channel spacing from the first guide channel (71-a31) to the turning channel (71-a33) and from the turning channel (71-a33) to the second guide channel (71-a32) is continuous and regular.

7. The injection mold for the wall switch panel of the spray-free material according to claim 6, characterized in that: The assembly block (71) is provided with a connection port (71-b) for connecting the outlet of the branch channel (63) and the feed port (71-a1).

8. The injection mold for the wall switch panel of the spray-free material according to claim 1, characterized in that: A plurality of groups of mold cooling pipes (9) are arranged in the front mold frame (2).

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