Small household appliance plastic part injection mold

Abstract

The utility model discloses a small household appliance plastic part injection mold. The small household appliance plastic part injection mold comprises a concave mold and a convex mold, the cleaning plate is arranged in the mold cavity in a sliding manner and is used for cleaning and demolding the mold cavity; the linkage demoulding device comprises a female die, a male die and a retraction cavity, the female die is arranged on one side of the female die, a retraction cavity is formed in the middle of the male die, and a die core is arranged in the middle of the retraction cavity in a sliding mode. The linkage demoulding device has the advantages that linkage demoulding is achieved, and meanwhile the die core and the die cavity are cleaned; the idle time in the production process is further shortened, production resources are utilized to the maximum extent, demolding and cleaning operations are carried out at the same time, the investment and maintenance cost of cleaning equipment is saved, accumulation and accumulation on the surface of the mold can be effectively prevented by regularly cleaning the mold core and the mold cavity, abrasion and corrosion of the mold are reduced, and the service life of the mold is prolonged. And the service life of the die is prolonged, the die replacement frequency is reduced, and the maintenance and replacement cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing small household appliance plastic parts, in particular to an injection mold for small household appliance plastic parts. Background Art

[0002] The injection mold for small household appliance plastic parts is a mold used to produce plastic parts for small household appliances. When the existing mold is in use, due to the stickiness of the hot-melt plastic, it will stick to the specific inner wall of the lower mold during the cooling process. In the process of directly pushing the plastic part out of the lower mold body, the plastic part may not be fully demolded, resulting in damage to the plastic part, and it is difficult to ensure its integrity. In addition, the two parts of the mold are separated and cannot be linked. The mold must be cleaned while demolding. Utility Model Content

[0003] The purpose of the utility model is to provide an injection mold for small household appliance plastic parts to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a small household appliance plastic part injection mold, comprising:

[0005] A concave mold with a mold cavity in the middle;

[0006] A cleaning plate, which is slidably arranged inside the mold cavity and is used for cleaning and demoulding the mold cavity;

[0007] A male mold, the male mold is placed on one side of the female mold, a retraction cavity is opened in the middle of the male mold, a mold core is slidably arranged in the middle of the retraction cavity, and a driving part for driving the mold core to extend and retract is provided on one side of the male mold;

[0008] A limiting column, the limiting column is fixedly connected to one side of the punch, and the end of the limiting column is fixedly connected to a fitting pressing plate for pushing the cleaning plate to move;

[0009] A connecting rod is fixedly connected to the top of the die, and a driving rod for pushing the driving part is fixedly connected to the end of the connecting rod.

[0010] Preferably, a cleaning air nozzle for cleaning the mold core is fixedly connected to the top of the male mold.

[0011] Preferably, one end of the cleaning plate is fixedly connected to a push rod, the end of the push rod is fixedly connected to a push plate, and a return spring is sleeved on the outer side of the push rod and located between the die and the push plate.

[0012] Preferably, the limiting posts pass through the four corners of the die and are slidably connected to the die.

[0013] Preferably, one end of the mold core is fixedly connected to a limiting slide rod, the limiting slide rod passes through the retraction cavity and out of one end of the punch, and a push spring is sleeved on the outer side of the limiting slide rod.

[0014] Preferably, the driving part includes a driving gear rotatably arranged on one side of the punch, an upper rack is meshedly connected to a position corresponding to the driving rod above the driving gear, and a lower rack is meshedly connected to the bottom of the driving gear, and both the upper rack and the lower rack are slidably connected to the punch.

[0015] Preferably, a receiving cavity cooperating with the upper rack is provided inside the mold core.

[0016] Preferably, the lower rack is rotated 180° with the driving gear as the center to overlap with the upper rack, and the end of the lower rack is fixedly connected to the mold core.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging the cooperation between the fitting pressure plate and the push plate, and the cooperation between the driving rod and the driving part, the mold core and the mold cavity can be cleaned while the demolding is linked, thereby further reducing the idle time in the production process, maximizing the use of production resources, and performing demolding and cleaning operations at the same time, saving the investment and maintenance costs of cleaning equipment. Regular cleaning of the mold core and the mold cavity can effectively prevent accumulation and deposition on the mold surface, reduce wear and corrosion of the mold, extend the service life of the mold, reduce the frequency of mold replacement, and save maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 It is an enlarged view of point A of the present utility model.

[0021] In the figure: 1. die; 2. punch; 3. limit column; 4. fitting pressure plate; 5. push plate; 6. push rod; 7. return spring; 8. connecting rod; 9. driving rod; 10. pushing spring; 11. limit slide bar; 12. driving gear; 13. upper rack; 14. lower rack; 15. storage cavity; 16. mold core; 17. retraction cavity; 18. mold cavity; 19. cleaning plate; 20. cleaning nozzle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The utility model provides a technical solution: a small household appliance plastic part injection mold, comprising: a female mold 1 with a mold cavity 18 in the middle; a cleaning plate 19 is slidably arranged inside the mold cavity 18 for cleaning and demoulding the mold cavity 18; a male mold 2 is placed on one side of the female mold 1, a retraction cavity 17 is arranged in the middle of the male mold 2, a mold core 16 is slidably arranged in the middle of the retraction cavity 17, and a driving part for driving the mold core 16 to extend and retract is provided on one side of the male mold 2; a limiting column 3 is fixedly connected to one side of the male mold 2, the limiting column 3 passes through the four corners of the female mold 1 and is slidably connected to the female mold 1, and a fitting pressing plate 4 for pushing the cleaning plate 19 to move is fixedly connected to the end of the limiting column 3; a connecting rod 8 is fixedly connected to the top of the female mold 1, and a driving rod 9 for pushing the driving part is fixedly connected to the end of the connecting rod 8.

[0024] It should be noted that, in the natural state of the present invention, the cleaning plate 19 is located inside the mold cavity 18 under the action of the reset spring 7 and the push plate 5, and the mold core 16 protrudes under the action of the push spring 10. When the concave mold 1 and the convex mold 2 are molded together, the mold core 16 is inserted into the mold cavity 18, and the gap between the mold cavity 18 and the mold core 16 forms a glue injection space. The glue enters from the glue injection port through the injection molding machine. After molding, the convex mold 2 is pushed to one side by the hydraulic cylinder. During the movement of the convex mold 2, the convex mold 2 The laminating pressing plate 4 is pulled by the limiting column 3 so as to make the laminating pressing plate 4 contact with the pushing plate 5. The cleaning plate 19 is squeezed by the pushing plate 5 to clean the inner wall of the mold cavity 18. When the upper rack 13 at one end of the punch 2 contacts the driving rod 9, the receiving cavity 15 pulls the mold core 16 into the retraction cavity 17 under the action of the extrusion and the gear rack, so as to extrude the product attached to the outside of the mold core 16 and make it fall. In addition, during the shrinkage of the mold core 16, the outside of the mold core 16 can be scraped and cleaned.

[0025] like Figure 1 , 2 As shown, a cleaning nozzle 20 for cleaning the mold core 16 is fixedly connected to the top of the male mold 2 .

[0026] It should be noted that, in the process of separation of the concave mold 1 and the punch 2 of the utility model, the cleaning air nozzle 20 can re-cool and clean the outside of the product, and after the mold core 16 is reset, the cleaning air nozzle 20 performs high-pressure blowing cleaning on the outside of the mold core 16. The high-pressure air flow can effectively rinse the surface of the mold core, quickly remove dirt, residue and dust, and ensure thorough cleaning.

[0027] like Figure 2 As shown, a push rod 6 is welded to one end of the cleaning plate 19 , a push plate 5 is mounted on the end of the push rod 6 via bolts, and a return spring 7 is sleeved on the outer side of the push rod 6 and between the die 1 and the push plate 5 .

[0028] It should be noted that, in the utility model, when the punch 2 pulls the fitting pressure plate 4 to extrude the push plate 5 through the limiting column 3, the push plate 5 pushes the push rod 6 and squeezes the reset spring 7 at the same time. When the die 1 and the punch 2 are molded together, the fitting pressure plate 4 is separated from the push plate 5. Under the action of the reset spring 7, the cleaning plate 19 moves to the end of the mold cavity 18, so as to facilitate the formation of a glue injection space that cooperates with the mold core 16 again.

[0029] like Figure 2 As shown, one end of the mold core 16 is fixedly connected to a limiting slide rod 11 , which passes through the retraction cavity 17 and comes out from one end of the punch 2 , and a push spring 10 is sleeved on the outer side of the limiting slide rod 11 .

[0030] It should be noted that, in the present invention, when the reset spring 7 contacts the upper rack 13, the lower rack 14 pulls the mold core 16 to move into the retraction chamber 17, and the mold core 16 drives the limiting slide bar 11 to move toward one end while squeezing the push spring 10. After the reset spring 7 separates from the upper rack 13, the push spring 10 pushes the mold core 16 to reset the mold core 16.

[0031] like Figure 3 As shown, the driving part includes a driving gear 12 rotatably arranged on one side of the punch 2, an upper rack 13 is meshedly connected to the position of the driving rod 9 above the driving gear 12, and a lower rack 14 is meshedly connected to the bottom of the driving gear 12. The upper rack 13 and the lower rack 14 are both slidably connected to the punch 2, and a storage cavity 15 cooperating with the upper rack 13 is provided inside the mold core 16. The lower rack 14 rotates 180° with the driving gear 12 as the center to overlap with the upper rack 13, and the end of the lower rack 14 is fixedly connected to the mold core 16.

[0032] It should be noted that when the driving rod 9 of the utility model contacts the upper rack 13, the upper rack 13 is squeezed. The upper rack 13 moves inside the retraction chamber 17 while pushing the driving gear 12 to rotate. The driving gear 12 drives the lower rack 14 to slide toward the outside of the retraction chamber 17. The lower rack 14 pulls the mold core 16 to move into the retraction chamber 17. It can accurately control the movement of the mold core and ensure the accuracy and stability of the mold movement. It has a compact structure and no complicated components or transmission devices, so it has high reliability and stability.

[0033] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for small household appliance plastic parts, characterized by: include: A female mold (1) having a mold cavity (18) in the middle; A cleaning plate (19), the cleaning plate (19) is slidably disposed inside the mold cavity (18) and is used for cleaning and demoulding the mold cavity (18); A male mold (2), the male mold (2) is placed on one side of the female mold (1), a retraction cavity (17) is provided in the middle of the male mold (2), a mold core (16) is slidably provided in the middle of the retraction cavity (17), and a driving part for driving the mold core (16) to retract is provided on one side of the male mold (2); A limiting column (3), the limiting column (3) is fixedly connected to one side of the punch (2), and the end of the limiting column (3) is fixedly connected to a fitting pressing plate (4) for pushing the cleaning plate (19) to move; A connecting rod (8) is fixedly connected to the top of the die (1), and a driving rod (9) for pushing the driving part is fixedly connected to the end of the connecting rod (8).

2. The injection mold for small household appliance plastic parts according to claim 1, characterized in that: A cleaning air nozzle (20) for cleaning the mold core (16) is fixedly connected to the top of the male mold (2).

3. The injection mold for small household appliance plastic parts according to claim 1, characterized in that: One end of the cleaning plate (19) is fixedly connected to a push rod (6), the end of the push rod (6) is fixedly connected to a push plate (5), and a return spring (7) is sleeved on the outer side of the push rod (6) and located between the die (1) and the push plate (5).

4. The injection mold for small household appliance plastic parts according to claim 1, characterized in that: The limiting columns (3) penetrate through the four corners of the female mold (1) and are slidably connected to the female mold (1).

5. The injection mold for small household appliance plastic parts according to claim 1, characterized in that: One end of the mold core (16) is fixedly connected to a limiting slide rod (11), the limiting slide rod (11) passes through the retraction cavity (17) and comes out from one end of the punch (2), and a push spring (10) is sleeved on the outer side of the limiting slide rod (11).

6. The injection mold for small household appliance plastic parts according to claim 1, characterized in that: The driving part comprises a driving gear (12) rotatably arranged on one side of the punch (2); an upper rack (13) is meshedly connected to a position above the driving gear (12) corresponding to the driving rod (9); a lower rack (14) is meshedly connected to the bottom of the driving gear (12); and both the upper rack (13) and the lower rack (14) are slidably connected to the punch (2).

7. The injection mold for small household appliance plastic parts according to claim 6, characterized in that: The mold core (16) is provided with a receiving cavity (15) inside thereof which cooperates with the upper rack (13).

8. The injection mold for small household appliance plastic parts according to claim 6, characterized in that: The lower rack (14) is rotated 180 degrees with the driving gear (12) as the center to overlap with the upper rack (13), and the end of the lower rack (14) is fixedly connected to the mold core (16).

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