Coating mold with hot air compensation structure

Abstract

The utility model discloses a cladding mould with a hot air compensation structure, which comprises a lower mould base, a mould cavity is arranged at the center of the bottom of the lower mould base, the front part of the left side of the mould cavity is communicated with an air inlet pipe, the rear part of the right side of the mould cavity is communicated with an air outlet pipe, and the inner edges of the left and right opposite sides of the air inlet pipe and the air outlet pipe are respectively matched with a sealing valve. Air ducts are fixedly connected to the left and right opposite sides of the air inlet pipe and the air outlet pipe, a heating bin and a vacuum machine are arranged on the left and right opposite sides of the air ducts in a matched mode correspondingly, and the heating bin is arranged to be matched with the air ducts and the air inlet pipe to guide hot air into a mold cavity to preheat the surface of a base material, and then the hot air is guided out through the air outlet pipe and the air ducts connected with the air outlet pipe; before secondary injection molding is carried out, the air inlet pipe is closed through the sealing valve, the air outlet pipe is opened through the sealing valve, residual air in the mold cavity is pumped out through the arranged vacuum machine, so that vacuum is formed in the mold cavity, bubbles and bumps are avoided while rapid injection molding is facilitated, and the coating efficiency and the molding quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile covering molds, in particular to a covering mold with a hot air compensation structure. Background Art

[0002] Overmolding technology combines two or more materials into one part. The technology usually involves molding a softer material onto a harder base. The overmolding process combines two or more different materials into a single bonded product. The core of this technology is to mold secondary materials onto existing parts. This method is popular when adding soft-touch surfaces to hard plastic or metal parts, especially in automotive interior and exterior decoration, to enhance its functionality and user experience. The overmolding molds for automotive covering parts mostly use secondary injection molding. In order to improve the tightness of the adhesion between different materials, hot air is also used to increase the surface temperature of the substrate during secondary injection molding to enhance the bonding strength and improve the quality of the molded product. However, there is more gas in the mold cavity after hot air compensation, and traditional exhaust is prone to bubble bulging problems, which affects the quality of overmolding. Utility Model Content

[0003] The utility model aims to provide a coating mold with a hot air compensation structure, which is convenient for rapid injection molding and avoids the generation of bubbles and bulges, thereby improving the coating efficiency and its molding quality.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coating mold with a hot air compensation structure, including a lower mold base, an upper mold base is arranged directly above the lower mold base, and a plurality of sliding shafts are arranged between the upper mold base and the lower mold base, the sliding shafts are cross-symmetrically distributed at the top four corners of the upper mold base and their bottom ends all pass through the upper mold base and are fixedly connected to the lower mold base, the top four corners of the upper mold base are fixedly connected with a driving slide, the driving slide drives the upper mold base to cooperate with the sliding shaft for sliding connection, a mold cavity is arranged at the bottom center of the lower mold base, the left front part of the mold cavity is connected with an air inlet pipe, and the right rear part of the mold cavity is connected with an air outlet pipe, the inner edges of the opposite sides of the air inlet pipe and the air outlet pipe are matched with sealing valves, the opposite sides of the air inlet pipe and the air outlet pipe are fixedly connected with air ducts, and the air The left and right opposite sides of the cylinder are respectively equipped with a heating bin and a vacuum machine, and the bottoms of the air inlet pipe, air outlet pipe, air duct, heating bin and vacuum machine are all embedded and fixed on the top of the lower mold base, and the left and right sides of the bottom of the upper mold base are provided with embedding grooves, which are downwardly corresponding to the heating bin and the vacuum machine. The heating bin is arranged to cooperate with the air duct and the air inlet pipe to first introduce hot air into the mold cavity to preheat the surface of the substrate and then lead it out through the air outlet pipe and the air duct connected to it, so as to ensure comprehensive hot air compensation. Before the secondary injection molding, the air inlet pipe is closed and the air outlet pipe is opened through the sealing valve, and the residual gas in the mold cavity is extracted by the vacuum machine to form a vacuum in the mold cavity. After completion, the air outlet pipe is closed and the injection port is opened, which is convenient for rapid injection molding while avoiding the generation of bubbles and bulging, thereby improving the coating efficiency and its molding quality.

[0005] According to the coating mold with a hot air compensation structure, a layer of thermal insulation sleeve is arranged around the outer side of the heating chamber to reduce heat loss and avoid accidental burns.

[0006] According to the coating mold with a hot air compensation structure, the air inlet pipe and the air outlet pipe are both made of highly heat-resistant materials to avoid deformation of the pipe due to heat.

[0007] According to the coating mold with a hot air compensation structure, a sealing gasket is fixedly connected to the outer edge of the top of the mold cavity to ensure the sealing of the mold cavity.

[0008] According to the coating mold with hot air compensation structure, a plurality of positioning rods are cross-symmetrically arranged at the bottom of the upper mold base, and the positioning rods are correspondingly inserted into the inner wall of the lower mold base downward and slidably engaged with it. The secondary injection molding operation is performed only after ensuring that the docking is accurate.

[0009] According to the coating mold with hot air compensation structure, the outer bottom of the sliding shaft is fixedly connected with a buffer ring, and the bottom of the buffer ring is fixedly connected to the lower mold base, so as to provide buffer protection when the upper and lower mold bases are butt-jointed.

[0010] The above scheme has the following beneficial effects:

[0011] In the utility model, a heating bin is provided to cooperate with a wind tube and an air inlet pipe to first introduce hot air into the mold cavity to preheat the surface of the substrate and then discharge it through the air outlet pipe and the wind tube connected thereto, thereby ensuring comprehensive hot air compensation. Before secondary injection molding, the air inlet pipe is first closed and the air outlet pipe is opened through a sealing valve, and the residual gas in the mold cavity is extracted through a vacuum machine to form a vacuum in the mold cavity. After completion, the air outlet pipe is closed and the injection port is opened, which facilitates rapid injection molding while avoiding the generation of bubbles and bulges, thereby improving the coating efficiency and its molding quality.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 This is a schematic diagram of a coating mold with a hot air compensation structure according to the utility model from a first perspective;

[0015] Figure 2 This is a schematic diagram from a second perspective of a coating mold with a hot air compensation structure of the utility model;

[0016] Figure 3 This is a structural schematic diagram of a lower mold base in a coating mold with a hot air compensation structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the connection structure between a heating chamber and a vacuum machine in a coating mold with a hot air compensation structure of the utility model.

[0018] Legend:

[0019] 1. Lower die base; 2. Upper die base; 3. Sliding shaft; 4. Driving slide; 5. Heating chamber; 6. Vacuum machine; 7. Embedded groove; 8. Air duct; 9. Air inlet pipe; 10. Air outlet pipe; 11. Sealing valve; 12. Sealing gasket; 13. Positioning rod; 14. Buffer ring. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation 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 cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Reference Figure 1-4 The utility model provides an embodiment: a coating mold with a hot air compensation structure, including a lower mold base 1, an upper mold base 2 is arranged directly above the lower mold base 1, and a plurality of sliding shafts 3 are arranged between the upper mold base 2 and the lower mold base 1. The sliding shafts 3 are cross-symmetrically distributed at the top four corners of the upper mold base 2 and their bottom ends all penetrate the upper mold base 2 and are fixedly connected to the lower mold base 1. The top four corners of the upper mold base 2 are fixedly connected with driving slides 4, and the driving slides 4 drive the upper mold base 2 to cooperate with the sliding shafts 3 for sliding connection. A mold cavity is provided at the bottom center of the lower mold base 1, and the left front part of the mold cavity is connected with an air inlet pipe 9, and the right rear part of the mold cavity is connected with an air outlet pipe 10. The inner edges of the opposite sides of the air inlet pipe 9 and the air outlet pipe 10 are matched with sealing valves 11, and the opposite sides of the air inlet pipe 9 and the air outlet pipe 10 are fixedly connected with air cylinders 8 , the left and right opposite sides of the air duct 8 are respectively equipped with a heating bin 5 and a vacuum machine 6, the bottoms of the above-mentioned air inlet pipe 9, air outlet pipe 10, air duct 8, heating bin 5 and vacuum machine 6 are all embedded and fixed on the top of the lower mold base 1, and the left and right sides of the bottom of the upper mold base 2 are provided with embedding grooves 7, and the embedding grooves 7 are downwardly corresponding to the heating bin 5 and the vacuum machine 6. A layer of insulation sleeve is arranged around the outside of the heating bin 5, the air inlet pipe 9 and the air outlet pipe 10 are made of high heat-resistant material, a sealing gasket 12 is fixedly connected to the top outer edge of the mold cavity, and a plurality of positioning rods 13 are cross-symmetrically arranged at the bottom of the upper mold base 2, and the positioning rods 13 are downwardly inserted into the inner wall of the lower mold base 1 and embedded and slid therewith, and the outer bottom of the sliding shaft 3 is fixedly connected with a buffer ring 14, and the bottom of the buffer ring 14 is fixedly connected to the lower mold base 1.

[0024] Working principle: In the utility model, a heating chamber 5 is provided to cooperate with a wind tube 8 and an air inlet pipe 9 to first introduce hot air into the mold cavity to preheat the surface of the substrate and then the hot air is discharged by the air outlet pipe 10 and the air outlet pipe 8 connected thereto, thereby ensuring comprehensive hot air compensation. Before secondary injection molding, the air inlet pipe 9 is first closed by the sealing valve 11, and the air outlet pipe 10 is opened. The residual gas in the mold cavity is extracted by the vacuum machine 6 to form a vacuum in the mold cavity. After completion, the air outlet pipe 10 is closed and the injection port is opened. This facilitates rapid injection molding while avoiding the generation of bubbles and bulges, thereby improving the coating efficiency and its molding quality.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A coating mold with a hot air compensation structure, comprising a lower mold base (1), characterized in that: An upper die seat (2) is arranged directly above the lower die seat (1), and a plurality of sliding shafts (3) are arranged between the upper die seat (2) and the lower die seat (1). The sliding shafts (3) are cross-symmetrically distributed at the top four corners of the upper die seat (2) and their bottom ends all penetrate the upper die seat (2) and are fixedly connected to the lower die seat (1). The top four corners of the upper die seat (2) are all fixedly connected with driving slide seats (4), and the driving slide seat (4) drives the upper die seat (2) to cooperate with the sliding shafts (3) for sliding connection; A mold cavity is provided at the center of the bottom of the lower mold base (1), the left front part of the mold cavity is connected to an air inlet pipe (9), and the right rear part of the mold cavity is connected to an air outlet pipe (10). The inner edges of the opposite sides of the air inlet pipe (9) and the air outlet pipe (10) are equipped with sealing valves (11). The opposite sides of the air inlet pipe (9) and the air outlet pipe (10) are fixedly connected to air cylinders (8), and the opposite sides of the air cylinder (8) are respectively equipped with heating bins (5) and vacuum machines (6). The bottoms of the air inlet pipe (9), the air outlet pipe (10), the air cylinder (8), the heating bins (5) and the vacuum machines (6) are all embedded and fixed on the top of the lower mold base (1), and the left and right sides of the bottom of the upper mold base (2) are both provided with embedding grooves (7), and the embedding grooves (7) are downwardly corresponding to the heating bins (5) and the vacuum machines (6).

2. The coating mold with a hot air compensation structure according to claim 1, characterized in that: The outer side of the heating chamber (5) is surrounded by a layer of thermal insulation sleeve.

3. The coating mold with a hot air compensation structure according to claim 1, characterized in that: The air inlet pipe (9) and the air outlet pipe (10) are both made of high heat-resistant material.

4. The coating mold with a hot air compensation structure according to claim 1, characterized in that: A sealing gasket (12) is fixedly connected to the outer edge of the top of the mold cavity.

5. The coating mold with a hot air compensation structure according to claim 1, characterized in that: A plurality of positioning rods (13) are cross-symmetrically arranged at the bottom of the upper die seat (2), and the positioning rods (13) are correspondingly inserted downward into the inner wall of the lower die seat (1) and slidably engaged therewith.

6. The coating mold with a hot air compensation structure according to claim 1, characterized in that: The outer bottom of the sliding shaft (3) is fixedly connected with a buffer ring (14), and the bottom of the buffer ring (14) is fixedly connected to the lower die seat (1).

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