Hot air injection molding machine

Abstract

The hot air injection molding machine comprises an injection molding device and an air heater, an injection molding cavity is formed in the injection molding device, a hot air frame is arranged in the injection molding cavity, a through hole is formed in the hot air frame, a hot air cavity is formed in the hot air frame, and the through hole communicates with the injection molding cavity and the hot air cavity; an opening is formed in the position, corresponding to the ventilation pipeline, in the injection molding cavity; and a guide groove is formed in the position, corresponding to the opening, in the injection molding cavity, the guide groove is located in the opening and the ventilation pipeline, and the hot air frame and the hot air cavity are arranged, so that plastic can be uniformly heated.

Description

Technical Field

[0001] The present application relates to the field of plastic processing equipment, and in particular to a hot air injection molding machine. Background Art

[0002] Injection molding machine refers to injection molding machine, also known as plastic injection molding machine. It is a kind of equipment used for processing plastic products. It is widely used in manufacturing plastic products, such as plastic parts, plastic containers, plastic toys, etc. The working principle of the injection molding machine is to heat and melt the plastic particles, inject them into the mold cavity through high pressure, and form the required plastic products after cooling.

[0003] Existing injection molding machines are prone to uneven heating during use. Uneven heating will cause inconsistent temperatures of the plastic during the injection process, resulting in large differences in the viscosity of the plastic melt. The physical properties and appearance quality of the final product will fluctuate, leading to unstable product quality and defects such as marks, bubbles, and poor melt flow on the product surface, affecting the appearance quality of the molded product.

[0004] Therefore, how to achieve uniform heating of the injection molding machine is an important technical problem that needs to be solved urgently. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a hot air injection molding machine, which can heat plastics evenly by providing a hot air frame and a hot air cavity.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0007] The present application provides a hot air injection molding machine, comprising:

[0008] An injection molding machine, wherein an injection molding machine is provided with an injection molding cavity, a hot air rack is arranged in the injection molding cavity, a through hole is provided on the hot air rack, a hot air cavity is formed in the hot air rack, and the through hole communicates the injection molding cavity and the hot air cavity;

[0009] A hot air blower, the hot air blower is connected to the injection molding cavity through a ventilation duct, and an opening is provided in the injection molding cavity at a position corresponding to the ventilation duct;

[0010] Wherein, a guide groove is arranged at a position corresponding to the opening in the injection cavity, and the guide groove is arranged between the opening and the ventilation duct.

[0011] Optionally, in some embodiments of the present application, a driving device is further provided on the injection molding machine, an output end of the driving device is connected to the hot air rack, and the driving device drives the hot air rack to rotate.

[0012] Optionally, in some embodiments of the present application, the output end of the driving device is connected to a fixing rod, and the end of the fixing rod away from the driving device is connected to a fixing piece;

[0013] A fixing opening is provided on the hot air rack at a position corresponding to the fixing member, and the fixing member is detachably connected to the fixing opening;

[0014] When the fixing member is assembled at the fixing opening, the hot air cavity is formed in the hot air rack, and the driving device drives the fixing rod to rotate the hot air rack.

[0015] Optionally, in some embodiments of the present application, the driving device has a pushing effect on the fixing rod, and when the driving device pushes the fixing rod to the first position, the fixing piece is assembled on the fixing port; when the driving device pushes the fixing rod to the second position, the fixing piece is disengaged from the fixing port.

[0016] Optionally, in some embodiments of the present application, the injector includes an injection molding cover, an annular groove is provided on the injection molding cover at a position corresponding to the hot air rack, and one end of the hot air rack close to the injection molding cover is located in the annular groove.

[0017] Optionally, in some embodiments of the present application, the guide groove is spirally arranged in the injection cavity, and one end of the guide groove abuts against the opening.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In the present application, a hot air rack and a driving device connected to the hot air rack are provided. When the plastic is heated, the plastic particles enter the hot air cavity of the hot air rack. The driving device drives the hot air rack to rotate, and the hot air blower is used to uniformly heat the plastic particles in the hot air rack to prevent some plastic particles from not being melted. At the same time, the driving device can drive the fixing parts on the hot air rack to move, so that the melted plastic particles can enter the injection cavity of the injection molding machine, and the particles can be removed easily.

[0020] 2. The present application provides a guide groove in the injection molding machine. When the hot air blower blows out hot air, the guide groove can guide the hot air to move from the bottom position of the injection molding machine to the corresponding position of the hot air rack, thereby avoiding excessive hot air from gathering at the bottom position of the injection molding machine, thereby avoiding waste of hot air energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the overall structure of a hot air injection molding machine provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a side cross-section structure of a hot air injection molding machine provided in an embodiment of the present application;

[0024] Figure 3 for Figure 2 A partial cutaway diagram of the fixing rod at the first position;

[0025] Figure 4 for Figure 2 A partial cutaway diagram of the fixing rod at the second position;

[0026] Figure 5 This is a schematic diagram of the overall structure of the injection molded cover provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 100, injection molding machine; 110, injection molding cavity; 111, guide groove; 120, hot air rack; 121, through hole; 122, hot air cavity; 123, fixing port; 130, injection molding cover; 131, ring groove; 132, inlet; 140, injection molding barrel; 150, output port; 200, hot air blower; 300, ventilation duct; 400, driving device; 410, fixing rod; 420, fixing part. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present application. It is understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for the convenience of clear description and does not limit the connection method.

[0030] Specifically, Figure 1As shown, an embodiment of the present application provides a hot air injection molding machine, which is mainly used to heat and melt particles such as plastics. After the plastics are melted, they are injected through an outlet to realize the working process of the hot air injection molding machine.

[0031] In the embodiment of the present application, the main structure of the hot air injection molding machine includes an injector 100 and a hot air blower 200. The injector 100 and the hot air blower 200 are connected by a ventilation duct 300, so that the hot air blown by the hot air blower 200 can enter the injection cavity 110 in the injector 100 through its ventilation duct 300. A hot air rack 120 is arranged in the injection cavity 110 of the injector 100. The hot air rack 120 is installed on the injector 100 through a driving device 400. The hot air rack 120 is a cylindrical shape. Through holes 121 are evenly opened on the cylindrical hot air rack 120. The through holes 121 connect the injection cavity 110 and the hot air cavity 122 inside the hot air rack 120. This arrangement mainly allows the hot air in the injection cavity 110 to enter the hot air cavity 122 through the through holes 121, so that the hot air can heat the plastic particles.

[0032] Before the above-mentioned heating process, the injection molding machine 100 mainly includes an injection molding cover 130 and an injection molding barrel 140. The injection molding cover 130 is assembled on the injection molding barrel 140 to form the injection molding machine 100, and an injection molding cavity 110 is formed at the same time, wherein an inlet 132 is arranged at a position corresponding to the hot air cavity 122 on the injection molding cover 130, and the inlet 132 is connected to the hot air cavity 122, so that the plastic particles can enter the hot air cavity 122 through the inlet 132.

[0033] In the above, an annular groove 131 is opened on the injection cover 130 at a position facing the injection cavity 110, and one end of the hot air rack 120 facing the injection cover 130 is located in the annular groove 131. The driving device 400 can drive the hot air rack 120 to rotate, and the rotation of the hot air rack 120 is carried out in the annular groove 131, which can avoid the deviation caused by the rotation of the hot air rack 120.

[0034] Since the through hole 121 is provided, the hot air can be blown to the plastic by the hot air blower 200 , wherein the size of the through hole 121 is smaller than the size of the plastic particles, so that the plastic particles cannot enter the injection cavity 110 through the through hole 121 .

[0035] A guide groove 111 is also provided in the injection molding device 100. The guide groove 111 is spirally arranged in the injection molding cavity 110, wherein one end of the guide groove 111 is connected to the opening, and the other end of the guide groove 111 is arranged in the direction of the hot air cavity 122. When the hot air blower 200 blows out hot air, the hot air enters the injection molding cavity 110 through the ventilation duct 300. Due to the provision of the guide groove 111, the hot air can flow through its guide groove 111 to form an annular wind flow. The annular wind flow blows around in the injection molding cavity 110, and can enter the hot air cavity 122 through the through hole 121 to heat the plastic. The guide groove 111 provided can guide the hot air, so that most of the hot air is blown into the hot air cavity 122, and avoids excessive hot air gathering at the bottom of the injection molding cavity 110 to generate heat waste. At the same time, it can also improve the heating efficiency by bringing more heat.

[0036] In the above, a fixing rod 410 is also connected to the output end of the driving device 400, and a fixing member 420 is arranged on the fixing rod 410. The fixing member 420 and the hot air rack 120 are enclosed to form a hot air cavity 122, and the fixing member 420 is abutted against or detachably connected to the hot air rack 120, and a fixing opening 123 is opened on the hot air rack 120 at a position corresponding to the fixing member 420. In the embodiment of the present application, the connection is arranged in a detachable contact manner. When the fixing member 420 is connected to the hot air rack 120, the fixing rod 410 is located in the first position, and the fixing member 420 can drive the hot air rack 120 to rotate. Under this structure, the plastic particles enter the hot air chamber 122 through its inlet 132, so that the plastic particles are accumulated at the bottom position of the hot air chamber 122. The hot air blower 200 and the driving device 400 are started, and the hot air enters the injection cavity 110 through its ventilation duct 300. Since the guide groove 111 is provided, the hot air enters the hot air chamber 122 from the injection cavity 110 through its through hole 121 under the guidance of its guide groove 111, so as to facilitate the heating of the plastic. In order to maintain the uniformity of heating, the driving device 400 drives the hot air rack 120 to rotate. During the rotation, the plastic particles in the hot air chamber 122 can be melted through the evenly arranged through holes 121 to prevent the plastic particles therein from being unable to melt.

[0037] In the above structure, in order to ensure that all plastic particles are melted, the fixing member 420 is set to a conical structure in the embodiment of the present application. The direction of the cone contraction of the structure is toward the direction of the driving device 400, so that the plastic can be closer to the edge of the hot air rack 120 to prevent the hot air from being unable to blow into the inside of the plastic pile. The conical structure can spread the plastic more and avoid the accumulation of plastic particles.

[0038] When the plastic is completely melted, the operation of the hot air blower 200 is stopped, and the driving device 400 pushes its fixing member 420 to move in a direction away from the driving device 400, so that the fixing rod 410 is located at the second position, so that a fixing port 123 is formed at the bottom of the hot air rack 120, and the melted plastic particles enter the injection cavity 110 through its fixing port 123, and an output port 150 is opened at the bottom position of the injection cavity 110, and the plastic can be directly output through its output port 150.

[0039] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A hot air injection molding machine, characterized in that: include: An injection molding machine, wherein an injection molding machine is provided with an injection molding cavity, a hot air rack is arranged in the injection molding cavity, a through hole is provided on the hot air rack, a hot air cavity is formed in the hot air rack, and the through hole communicates the injection molding cavity and the hot air cavity; A hot air blower, the hot air blower is connected to the injection molding cavity through a ventilation duct, and an opening is provided in the injection molding cavity at a position corresponding to the ventilation duct; A driving device, wherein an output end of the driving device is connected to the hot air rack, and the driving device drives the hot air rack to rotate; A fixing member, the fixing member is arranged in the hot air rack, the fixing member is arranged in a conical structure, and the direction in which the cone contracts is toward the direction of the driving device; A guide groove is provided in the injection cavity at a position corresponding to the opening, the guide groove is located between the opening and the ventilation duct, the guide groove is spirally provided in the injection cavity, and one end of the guide groove abuts against the opening.

2. The hot air injection molding machine according to claim 1, characterized in that: The output end of the driving device is connected to a fixing rod, and the end of the fixing rod away from the driving device is connected to a fixing piece; A fixing opening is provided on the hot air rack at a position corresponding to the fixing member, and the fixing member is detachably connected to the fixing opening; When the fixing member is assembled at the fixing opening, the hot air cavity is formed in the hot air rack, and the driving device drives the fixing rod to rotate the hot air rack.

3. The hot air injection molding machine according to claim 2, characterized in that: The driving device has a pushing effect on the fixing rod. When the driving device pushes the fixing rod to the first position, the fixing piece is assembled on the fixing port; when the driving device pushes the fixing rod to the second position, the fixing piece is disengaged from the fixing port.

4. The hot air injection molding machine according to claim 2, characterized in that: The injection molding device comprises an injection molding cover, a ring groove is formed on the injection molding cover at a position corresponding to the hot air rack, and one end of the hot air rack close to the injection molding cover is located in the ring groove.

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