Injection unit for an injection molding machine

Abstract

The utility model belongs to injection molding machine technical field especially relates to a kind of injection molding machine shooting device, including base, be equipped with barrel on base, be equipped with material cavity in barrel, be equipped with screw in material cavity, the tail end of screw is connected with a motor, motor can drive screw rotation, the end of barrel away from motor is equipped with nozzle, detachable heat preservation device is set on barrel, heat preservation device includes first casing and second casing;First casing and second casing are sequentially provided with heat insulation layer, heat preservation layer and shell from inside to outside, heat conduction layer and barrel mutually abut, first casing and second casing are equipped with auxiliary magnetic attraction device and fixing device. By setting heat preservation device can heat preservation is carried out to barrel, reduce energy consumption, when short-term shutdown, heating wire does not need to be always opened, by setting auxiliary magnetic attraction device can make that user is more easily when dismounting and installing heat preservation device.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding machine technology, and in particular relates to an injection device for an injection molding machine. Background Technology

[0002] Vertical injection molding machines are the main molding equipment that injects liquid thermoplastic or thermosetting plastics into a molding die through an injection device. The plastic cools inside the die to form plastic products of various shapes. During the injection molding process, plastic granules are usually placed in a heating cylinder, and the molten plastic solution is injected into the molding die using the heating cylinder.

[0003] An existing high-efficiency heat preservation device for the heating cylinder of an injection molding machine, authorized by CN215969963U, provides effective protection for the heating cylinder by setting an insulation shell outside the heating cylinder, along with a mounting block, an upper pressure ring, and a lower pressure ring, thus avoiding damage caused by friction of the outer insulation cotton of the heating cylinder.

[0004] To maintain the temperature of the heating cylinder of an existing injection molding machine, an insulation shell is added to the outer layer. However, because the heating cylinder has heating wires for heating, this part of the structure is prone to problems and requires regular maintenance and inspection. The removability of the insulation shell is a necessary condition. At least two people are needed to complete the disassembly and installation, which is a waste of manpower and quite troublesome. Utility Model Content

[0005] The purpose of this utility model is to provide an injection device for an injection molding machine, which aims to solve the technical problem in the background art that "at least two people are needed to complete the disassembly and installation of the heating cylinder insulation shell, which is a waste of manpower and quite troublesome".

[0006] To achieve the above objectives, this utility model provides an injection molding machine injection device, including a base, a barrel on the base, a material cavity inside the barrel, a screw inside the material cavity, a motor connected to the tail end of the screw, the motor driving the screw to rotate, a nozzle at the end of the barrel away from the motor, a feeding port on the barrel communicating with the material cavity, a heating element on the barrel, and a detachable heat preservation device fitted onto the heating element, the heat preservation device including a first shell and a second shell; the first shell and the second shell are sequentially provided with a heat insulation layer, a heat preservation layer and an outer shell from the inside out, the heat-conducting layer abutting against the barrel, and an auxiliary magnetic attraction device and a fixing device on the first shell and the second shell, the auxiliary magnetic attraction device assisting in the installation and removal of the fixing device.

[0007] Optionally, both the first housing and the second housing are symmetrical semi-cylindrical shapes, and both the first housing and the second housing have clearance spaces inside. When the first housing and the second housing are joined together, the two clearance spaces form a receiving cavity for accommodating the material cylinder.

[0008] Optionally, the first housing includes two internal first abutting surfaces; the second housing includes two internal second abutting surfaces; during assembly, the two first abutting surfaces and the two second abutting surfaces abut together to form a hollow cylinder fitted onto the material cylinder, each of the first abutting surfaces and each of the second abutting surfaces is provided with a first heat insulation plate and a second heat insulation plate, and the first heat insulation plate is provided with a sealing element; the auxiliary magnetic attraction device includes a plurality of first magnets; the sealing element is provided with a groove, the groove is used to place the first magnets, and the second heat insulation plate is provided with a magnetic guiding plate, the plurality of first magnets can be attracted to the magnetic guiding plate, for assisting the assembly of the first housing and the second housing.

[0009] Optionally, the seal is elastic, and the first magnet does not protrude from the groove.

[0010] Optionally, the fixing device includes a first fixing seat and a second fixing seat that are correspondingly arranged; the first fixing seat is disposed on the first housing and the second fixing seat is disposed on the second housing. When the first housing and the second housing are assembled, bolts can be sequentially inserted into the first fixing seat and the second fixing seat to keep the first housing and the second housing in an assembled state.

[0011] Optionally, both the first fixing seat and the second fixing seat are provided with multiple mounting holes, and the bolts are inserted through the mounting holes to keep the first housing and the second housing in a spliced ​​state.

[0012] Optionally, the feed cylinder includes a feeding section and a heating and heat preservation section; the feeding section and the heating and heat preservation section are interconnected, and a partition seat is provided between the feeding section and the heating and heat preservation section. The auxiliary magnetic attraction device also includes a second magnet; the second magnet is disposed on the partition seat on the side close to the heat preservation device, and one end of the first shell and the second shell can attract each other with the second magnet. The outer shell of the first shell and the shell is made of magnetically conductive material.

[0013] Optionally, the feeding port is further provided with a hopper, and the hopper is provided with multiple feeding ports.

[0014] Optionally, a speed reducer is provided between the screw and the motor, the speed reducer being used to reduce speed and increase torque.

[0015] Optionally, the insulation device is also provided with a protective cover.

[0016] Compared with the prior art, the above-mentioned one or more technical solutions in the injection molding machine injection device provided by the present invention have at least one of the following technical effects:

[0017] By setting up a heat preservation device, the material cylinder can be kept warm, reducing energy consumption. During short shutdowns, it is not necessary to keep the heating wire on continuously. By setting up an auxiliary magnetic suction device, it is easier for users to disassemble and install the heat preservation device. First, the first and second shells are initially fixed with magnetic attraction, and then the connection is reinforced by the fixing device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a partial structural schematic diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the material cylinder and heat preservation device of this utility model.

[0022] Figure 4 This is a cross-sectional structural diagram of the material cylinder and heat preservation device of this utility model.

[0023] Figure 5 This is a schematic diagram of the thermal insulation structure.

[0024] The following are the labeling elements in the figure:

[0025] 100. Base; 110. Material cylinder; 111. Material chamber; 112. Feed port; 113. Feeding section; 114. Heating and insulation section; 115. Divider seat; 120. Screw; 130. Motor; 140. Nozzle; 150. Heating element; 160. Hopper; 170. Inlet; 180. Reducer; 190. Protective cover;

[0026] 200. Thermal insulation device; 210. First housing; 211. First contact surface; 212. First heat insulation plate; 213. Sealing element; 214. Groove; 220. Second housing; 221. Second contact surface; 222. Second heat insulation plate; 223. Magnetic plate; 230. Heat insulation layer; 240. Thermal insulation layer; 250. Outer shell; 260. Clearance space;

[0027] 310. First magnet; 320. Second magnet;

[0028] 400, Fixing device; 410, First fixing seat; 420, Second fixing seat; 430, Mounting hole. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In one embodiment of this utility model, according to Figure 1-5As shown, the base 100 is equipped with a material cylinder 110, which contains a material cavity 111. A screw 120 is housed within the material cavity 111, and its tail end is connected to a motor 130. The motor 130 drives the screw 120 to rotate. A nozzle 140 is located at the end of the material cylinder 110 away from the motor 130. A feeding port 112 is also provided on the material cylinder 110, connecting to the material cavity 111. A reducer 180 is also provided between the screw 120 and the motor 130, used to reduce speed and increase torque. Specifically, the output shaft of the motor 130 is connected to the reducer 180, which in turn connects to the screw 120, driving the screw 120 to rotate and plasticize and advance the material.

[0034] The material cylinder 110 is equipped with a heating element 150, and a detachable heat preservation device 200 is fitted onto the heating element 150. The heat preservation device 200 includes a first shell 210 and a second shell 220. Specifically, the first shell 210 and the second shell 220 are both symmetrical semi-cylindrical shapes that can be assembled to form a hollow cylinder. Both the first shell 210 and the second shell 220 have clearance spaces 260 inside. When assembled, the two clearance spaces 260 combine to form a receiving cavity that connects to the outside to accommodate the material cylinder 110 and the heating element 150. The heating element 150 heats the material cylinder 110, and the heat preservation device 200 keeps the material cylinder 110 warm, reducing energy consumption. During short shutdowns, the heating wire does not need to be continuously turned on.

[0035] The first housing 210 and the second housing 220 are sequentially provided with a heat insulation layer 230, a heat preservation layer 240, and an outer shell 250 from the inside out. The heat-conducting layer abuts against the material cylinder 110. The heating element 150 consists of multiple heating wires arranged around the material cylinder 110. The heating wires are spaced apart and do not cover the entire material cylinder 110. How the heating wires are arranged on the material cylinder 110 is a conventional technique in the art and will not be described in detail here.

[0036] The heat insulation layer 230 is made of ceramic fiber, the heat insulation layer 240 is made of heat insulation cotton, and the outer shell 250 is made of magnetic material, such as low carbon steel.

[0037] The first housing 210 and the second housing 220 are provided with an auxiliary magnetic attraction device and a fixing device 400. The auxiliary magnetic attraction device can assist in the installation and removal of the fixing device 400. Specifically, by providing the auxiliary magnetic attraction device, it is easier for the user to install and remove the insulation device 200. First, the first housing 210 and the second housing 220 are initially fixed by magnetic attraction, and then the connection is reinforced by the fixing device 400. The same applies to disassembly.

[0038] like Figure 4 and 5 As shown, the first housing 210 includes two internal first abutting surfaces 211; the second housing 220 includes two internal second abutting surfaces 221; when assembled, the two first abutting surfaces 211 and the two second abutting surfaces 221 abut against each other to form a hollow cylinder fitted onto the material cylinder 110. Each first abutting surface 211 and each second abutting surface 221 is provided with a first heat insulation plate 212 and a second heat insulation plate 222, respectively. The first heat insulation plate 212 is provided with a sealing element 213; the auxiliary magnetic attraction device includes a plurality of first magnets 310; the sealing element 213 is provided with a groove 214, the groove 214 is used to place the first magnets 310, and the second heat insulation plate 222 is provided with a magnetic guiding plate 223. The plurality of first magnets 310 can be attracted to the magnetic guiding plate 223 to assist in the assembly of the first housing 210 and the second housing 220.

[0039] Specifically, the two first contact surfaces 211 and the two second contact surfaces 221 are actually the mating surfaces of the first shell 210 and the second shell 220. The first contact surfaces 211 and 221 are respectively provided with the first heat insulation plate 212 and the second heat insulation plate 222. Both the first heat insulation plate 212 and the second heat insulation plate 222 are made of ceramic fiber to prevent the heat from the heating wire from escaping through the joint. The first heat insulation plate 212 is provided with a sealing element 213, which is a high-temperature resistant fluororubber strip, primarily serving a sealing function. The strip has a groove 214, and a first magnet 310 is provided in the groove 214. This groove 214 can be a through groove. The magnet is connected to the first heat insulation plate 212. The first magnet 310 does not protrude from the groove 214. The thickness of the sealing member 213 is such that after being squeezed and spliced ​​by the first abutment surface 211 and the second abutment surface 221, the high-temperature resistant fluororubber strip can be compressed and has elasticity. After compression, the first magnet 310 and the magnetic guide plate 223 are exposed and attract each other, which is used to assist the splicing of the first housing 210 and the second housing 220.

[0040] according to Figure 3-5 As shown, the fixing device 400 includes a first fixing seat 410 and a second fixing seat 420 respectively. The first fixing seat 410 is disposed on the first housing 210, and the second fixing seat 420 is disposed on the second housing 220. When the first housing 210 and the second housing 220 are assembled, bolts can be sequentially inserted into the first fixing seat 410 and the second fixing seat 420 to keep the first housing 210 and the second housing 220 in an assembled state.

[0041] Specifically, the fixing seat should be located in the middle of the first housing 210 and the second housing 220. Both the first fixing seat 410 and the second fixing seat 420 are provided with multiple mounting holes 430. Bolts corresponding to the number of mounting holes 430 pass through the mounting holes 430 on the first fixing seat 410 and the second fixing seat 420 in sequence to realize the fixed connection between the first fixing seat 410 and the second fixing seat 420, thereby realizing the first housing 210 and the second housing 220 in a spliced ​​state.

[0042] according to Figure 2 and 4 As shown, the material cylinder 110 includes a feeding section 113 and a heating and heat preservation section 114; the feeding section 113 and the heating and heat preservation section 114 are interconnected, and the feeding section 113 needs to be separated from the heating and heat preservation section 114. If they are not separated, the material in the feeding section 113 will melt, which will easily block the feeding port 112.

[0043] A separator 115 is provided between the feeding section 113 and the heating and heat preservation section 114. The auxiliary magnetic attraction device also includes a second magnet 320. The second magnet 320 is located on the separator 115 near the heat preservation device 200. One end of the first shell 210 and the second shell 220 can attract each other with the second magnet 320. The outer shell 250 covers the side and the top and bottom surfaces of the cylinder. The outer shell 250 is made of a magnetically conductive material, such as low carbon steel.

[0044] The partition seat 115 is equipped with a second magnet 320. During installation, the worker can first magnetically connect the bottom of the first housing 210 or the second housing 220 to the second magnet 320, which has a pulling force. One hand can hold one housing, while the other hand can pick up the other housing and magnetically attach its bottom to the second magnet 320. Then, both hands can close the first housing 210 and the second housing 220, and the first magnet 310 will magnetically attract the magnetic guide plate 223, achieving initial fixation. This process can be completed by one person. Similarly, disassembly is also done in the same way. During maintenance, one person can complete the work, which is convenient and saves labor.

[0045] according to Figure 2 and 3 As shown, the feeding port 112 is also provided with a hopper 160, which has multiple feeding ports 170 to speed up the feeding process. The insulation device 200 is also provided with a protective cover 190 to protect outsiders and prevent curious operation of the external insulation device 200. At the same time, even if the heat insulation layer 230 is provided, the outer shell 250 may still have a certain temperature due to the heat conduction of the metal, which can prevent burns.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this utility model. It should not be construed that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art, the architectural form of this utility model can be flexibly varied without departing from its concept, and a series of products can be derived. Any simple deductions or substitutions should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. An injection molding machine injection device, comprising a base, a barrel mounted on the base, a material cavity within the barrel, a screw within the material cavity, a motor connected to the tail end of the screw, the motor driving the screw to rotate, a nozzle located at the end of the barrel away from the motor, and a feeding port on the barrel communicating with the material cavity, characterized in that, The material cylinder is equipped with a heating element, and a detachable heat preservation device is fitted onto the heating element. The heat preservation device includes a first shell and a second shell that can be assembled. The first shell and the second shell are provided with a heat insulation layer, a heat preservation layer and an outer shell from the inside to the outside. The heat insulation layer abuts against the material cylinder. The first shell and the second shell are equipped with an auxiliary magnetic attraction device and a fixing device. The auxiliary magnetic attraction device can assist in the installation and removal of the fixing device.

2. The injection molding machine injection device according to claim 1, characterized in that, Both the first shell and the second shell are symmetrical semi-cylindrical shapes. Both the first shell and the second shell have clearance spaces inside. When the first shell and the second shell are joined together, the two clearance spaces form a receiving cavity to accommodate the material cylinder.

3. The injection molding machine injection device according to claim 1, characterized in that, The first housing includes two internal first abutting surfaces; the second housing includes two internal second abutting surfaces; when assembled, the two first abutting surfaces and the two second abutting surfaces abut together to form a hollow cylinder fitted onto the material cylinder. Each first abutting surface and each second abutting surface is provided with a first heat insulation plate and a second heat insulation plate, and the first heat insulation plate is provided with a sealing element; the auxiliary magnetic attraction device includes a plurality of first magnets; the sealing element is provided with a groove, the groove being used to place the first magnets; the second heat insulation plate is provided with a magnetic guiding plate, and the plurality of first magnets can be attracted to the magnetic guiding plate to assist in the assembly of the first housing and the second housing.

4. The injection molding machine injection device according to claim 3, characterized in that, The seal is elastic, and the first magnet does not protrude from the groove.

5. The injection molding machine injection device according to claim 1, characterized in that, The fixing device includes a first fixing seat and a second fixing seat that are correspondingly arranged; the first fixing seat is disposed on the first housing and the second fixing seat is disposed on the second housing. When the first housing and the second housing are assembled, bolts can be sequentially inserted through the first fixing seat and the second fixing seat to keep the first housing and the second housing in an assembled state.

6. The injection molding machine injection device according to claim 5, characterized in that, Both the first and second fixing seats are provided with multiple mounting holes, and the bolts are inserted through the mounting holes to keep the first housing and the second housing in a spliced ​​state.

7. The injection molding machine injection device according to claim 2, characterized in that, The feed cylinder includes a feeding section and a heating and heat preservation section; the feeding section and the heating and heat preservation section are interconnected, and a partition seat is provided between the feeding section and the heating and heat preservation section. The auxiliary magnetic attraction device also includes a second magnet; the second magnet is located on the partition seat near the heat preservation device, and one end of the first shell and the second shell can attract each other with the second magnet. The outer shell of the first shell and the shell is made of magnetically conductive material.

8. The injection molding machine injection device according to claim 1, characterized in that, The feeding port is also equipped with a hopper, and the hopper has multiple feeding ports.

9. The injection molding machine injection device according to claim 1, characterized in that, A speed reducer is also provided between the screw and the motor, and the speed reducer is used to reduce speed and increase torque.

10. The injection molding machine injection device according to any one of claims 1-9, characterized in that, The insulation device is also equipped with a protective cover.

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