Heating splitter plate for injection molding machine

Abstract

A heating spreader plate for an injection molding machine comprises a plate body, a spreader assembly and at least one heating assembly, the spreader assembly comprises a main nozzle, at least three spreader nozzle groups and a passage, the spreader nozzle groups are sequentially arranged in a straight line, the heating assembly comprises a mounting groove and a heat pipe, and the heat pipe is arranged in the mounting groove. The two ends of the installation groove of each flow dividing nozzle set located in the middle are each provided with a bent part so that the distance between the adjacent installation grooves can be shortened. According to the heating splitter plate for the injection molding machine, the mounting grooves are formed in the plate body, the heating pipes are arranged in the mounting grooves so as to reduce heat dissipated into air and improve the heating effect, the two ends of each mounting groove are each provided with one bent part, and therefore the distance between every two adjacent mounting grooves is increased, and the heating effect is improved. Therefore, the plastic raw materials are continuously heated, the temperature of the plastic raw materials is stable and uniform, and the plastic raw materials smoothly flow in the passage.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding machines, in particular to a heating manifold for injection molding machines. Background Art

[0002] As an important plastic processing equipment, the injection molding machine is widely used in the production process of various plastic products. During the operation of the injection molding machine, the plastic raw materials need to be preheated and diverted through the heating manifold to meet the requirements of the injection molding process. The traditional heating manifold is usually heated by electric heating wires or electric heating tubes. The electric heating tube or electric heating wire is wrapped around the diversion nozzle so that the plastic raw materials can be heated before discharging.

[0003] There are some problems with the traditional heating manifold. When the volume of the manifold is too large, the temperature of the plastic raw material will drop when it flows from the main nozzle to the diverter nozzle, and the dropped temperature will increase with the increase of the distance between the main nozzle and the diverter nozzle. Since the heating temperature of the heating wire or the heating tube is limited, this will make the temperature of the plastic raw material flowing out of different diverter nozzles different, and since the heating tube is arranged around the diverter nozzle, the plastic raw material before flowing to the diverter nozzle can easily be cooled down due to the distance from the heating tube, which affects the flow rate of the plastic raw material. Utility Model Content

[0004] In view of this, the utility model provides a heating manifold for an injection molding machine to solve the above problems.

[0005] A heating manifold plate for an injection molding machine, comprising a plate body, a manifold assembly disposed on the plate body, and at least one heating assembly disposed on at least one side of the plate body. The manifold assembly comprises a main nozzle opened at the top of the plate body, at least three groups of manifold nozzle groups opened at the bottom of the plate body and spaced apart, and a passage opened inside the plate body and connecting the main nozzle with each of the manifold nozzle groups. The manifold nozzle groups are arranged in a straight line in sequence. Each group of the manifold nozzle groups comprises two manifold nozzles, and the main nozzle is disposed between two adjacent manifold nozzle groups. The heating assembly comprises mounting grooves opened on the plate body and respectively surrounding each of the manifold nozzle groups, and heating tubes respectively installed in each of the mounting grooves. A bending portion is respectively disposed at both ends of the mounting groove of each of the middle manifold nozzle groups to shorten the spacing between adjacent mounting grooves.

[0006] Further, when the number of the diverter nozzle groups is an even number, the main nozzle is arranged at the midpoint of all the diverter nozzle groups to equally divide all the diverter nozzle groups.

[0007] Further, when the number of the diverter nozzle groups is an odd number, the main nozzle is arranged on one side of the diverter nozzle group located at the center.

[0008] Furthermore, the number of the diverter nozzle groups is 3, and the connecting lines between the two diverter nozzles in each diverter nozzle group are respectively parallel.

[0009] Furthermore, the plate body includes three main plate bodies arranged at intervals, and a connecting portion arranged between adjacent main plate bodies, the two diversion groups of each diversion nozzle group are symmetrically arranged at both ends of the main plate body, the main nozzle is arranged on the connecting portion, and the main nozzle is at the same distance from the two diversion nozzles of each diversion nozzle group.

[0010] Furthermore, the end notches of the bent portion are respectively opened on both sides of the connecting portion.

[0011] Furthermore, the bottom of the mounting groove is in an arc shape, the cross-sectional diameter of the heating tube is the same as the cross-sectional diameter of the bottom of the mounting groove, and the depth of the mounting groove is greater than the cross-sectional diameter of the heating tube.

[0012] Furthermore, the heating components are respectively arranged on the top and bottom of the plate body.

[0013] Furthermore, the passage includes branch channels respectively connected to the two diverter nozzles of each diverter nozzle group, and main channels respectively connected to each branch channel and the main nozzle.

[0014] Compared with the prior art, the heating diverter plate for an injection molding machine provided by the utility model opens the installation groove on the plate body, arranges the heating pipe in the installation groove to reduce the heat dissipated into the air and improves the heating effect, and arranges a bending portion at each end of the installation groove, thereby shortening the distance between adjacent installation grooves, so that the plastic raw material is continuously heated, ensuring that the temperature of the plastic raw material is stable and uniform, and ensuring that the plastic raw material flows smoothly in the passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a heating manifold for an injection molding machine.

[0016] Figure 2 for Figure 1 Bottom view of a heated manifold for an injection molding machine.

[0017] Figure 3 for Figure 1 A horizontal cross-sectional view of a heated manifold for an injection molding machine.

[0018] Figure 4 for Figure 1 A partial vertical section view of a heating manifold for an injection molding machine at the mounting groove. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0020] like Figures 1 to 4 As shown, it is a schematic diagram of the structure of the heating manifold for injection molding machine provided by the utility model. The heating manifold for injection molding machine includes a plate body 10, a manifold assembly 20 provided on the plate body 10, and at least one heating assembly 30 provided on at least one side of the plate body. The heating manifold for injection molding machine also includes some other functional modules, such as a positioning structure provided on the plate body 10, etc., which should be well known to those skilled in the art and will not be described in detail one by one here.

[0021] The board body 10 includes a plurality of substrates 11 and connecting portions 12 respectively arranged between adjacent substrates 11. The substrates 11 are in a rectangular block structure and are arranged at intervals between adjacent substrates 11. In this embodiment, the number of substrates 11 is 3. The connecting portions 12 respectively connect the middle portions of two substrates 11, thereby connecting the three substrates 11 to form a whole.

[0022] The diversion assembly 20 includes a main nozzle 21 opened at the top of the plate body 10, at least three diversion nozzle groups 22 opened at the bottom of the plate body 10, and a passage 23 arranged in the plate body 10 and connecting the main nozzle 21 and the diversion nozzle group 22.

[0023] The main nozzle 21 is provided on the connecting portion 12. The main nozzle 21 is used to guide the plastic raw material to flow into the following passage 23 in the body 10. The main nozzle 21 is located above the following main channel 232 of the passage 23 and between two adjacent branch channels 231, rather than being arranged above the intersection of the main channel 232 and the branch channel 231, so as to avoid the plastic raw material flowing into the passage 23 from the main nozzle 21 from being blocked at the intersection of the branch channel 231 and the main channel 232, thereby affecting the flow of the plastic raw material.

[0024] The diverter nozzle groups 22 are arranged in a straight line in sequence. Adjacent diverter nozzle groups 22 are arranged at equal intervals. When the number of the diverter nozzle groups 22 is an even number, the main nozzle 21 is arranged on the connecting portion 12 located at the center; when the number of the diverter nozzle groups 22 is an odd number, the main nozzle 21 is arranged on the connecting portion 12 adjacent to the diverter nozzle group 22 located at the center. In this embodiment, the number of the diverter nozzle groups 22 is 3.

[0025] Each of the flow diversion nozzle groups 22 includes two flow diversion nozzles 221 arranged at intervals. The flow diversion nozzles 221 are symmetrically arranged on the substrate 11. The connecting line of the two flow diversion nozzles 221 on the flow diversion nozzle group 22 is parallel to the adjacent flow diversion nozzle groups 22.

[0026] The passage 23 includes a branch channel 231 respectively connected to the two diverter nozzles 221 of each diverter nozzle group 22 , and a main channel 232 respectively connected to each branch channel 231 and the main nozzle 21 .

[0027] The main channels 232 are respectively distributed along the symmetry axes of each of the substrates 11 and the connecting portion 12 .

[0028] The main channel 232 and the branch channel 231 are respectively located at the central layer of the panel 10 , so that they are at the same distance from the top surface and the bottom surface of the panel 10 .

[0029] The heating assembly 30 includes a mounting groove 31 opened on the plate body and respectively surrounding each of the diversion nozzle groups 22 , and a heating tube 32 respectively installed in each of the mounting grooves 31 .

[0030] A bending portion 33 is respectively provided at both ends of the corresponding mounting 31 of each of the diverter nozzle groups located in the middle.

[0031] The bottom of the mounting groove 31 is in an arc shape. The groove wall of the mounting groove 31 is perpendicular to the top surface and the bottom surface of the plate body 10 .

[0032] The cross-sectional diameter of the heating tube 32 is the same as the diameter of the circular arc of the bottom of the mounting groove 31, so that the heating tube 32 can be closely abutted against the bottom of the mounting groove 31. The groove depth of the mounting groove 31 is greater than the cross-sectional diameter of the heating tube 32, so that the heating tube 32 is embedded in the plate body 10, reducing the heat loss of the heating tube 32.

[0033] The shape of the heating tube 32 is the same as that of the mounting groove 31. The heating tube 32 is a common heating device, and its shell is made of metal material, such as iron alloy. The electric heating wire located in the shell of the heating tube 32 is heated by conduction, and the heat is transferred to the shell, thereby achieving heating. Since the heating tube 32 is a common technical content in the field and is not the main content of the utility model, it will not be described here.

[0034] The curved portion 33 is located on the connecting portion 12. The curved portion 33 can increase the heating range of the heating tube 32, so that the heating tube 32 can additionally heat the injection liquid in the passage 23 away from the main nozzle 21, so that the temperature of the injection liquid in the passage 23 is stable and uniform.

[0035] In this embodiment, the bending portion 33 is disposed at two ends of the mounting slot 31 on the substrate 11 located in the middle. The middle portion of the bending portion 33 is bent toward the main channel 232 to be as close to the main channel 232 as possible.

[0036] When in use, the plastic raw material is injected from the main nozzle 21, flows along the main channel 232 to the branch channel 231, and finally injected into the nozzle through the diverter nozzle 221. It should be noted that an opening 13 is provided on the plate body 10 corresponding to each diverter nozzle 221 for the valve needle to pass through, so as to facilitate the opening and closing of the nozzle to be controlled by the valve needle.

[0037] Compared with the prior art, the heating diverter plate for an injection molding machine provided by the utility model opens the installation groove 31 on the plate body 10, and sets the heating tube 32 in the installation groove 31 to reduce the heat dissipated into the air and improve the heating effect. A bending portion 33 is respectively set at both ends of the installation groove 31, thereby shortening the distance between adjacent installation grooves 31, so that the plastic raw material is continuously heated, ensuring that the temperature of the plastic raw material is stable and uniform, and ensuring that the plastic raw material flows smoothly in the passage 23.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A heating manifold for an injection molding machine, characterized in that: The heating diverter plate for an injection molding machine includes a plate body, a diverter assembly arranged on the plate body, and at least one heating assembly arranged on at least one side of the plate body. The diverter assembly includes a main nozzle opened at the top of the plate body, at least three groups of diverter nozzle groups opened at the bottom of the plate body and arranged at intervals, and a passage opened inside the plate body and connecting the main nozzle with each of the diverter nozzle groups. The diverter nozzle groups are arranged in a straight line in sequence, each group of the diverter nozzle groups includes two diverter nozzles, and the main nozzle is arranged between two adjacent diverter nozzle groups. The heating assembly includes mounting grooves opened on the plate body and respectively surrounding each of the diverter nozzle groups, and heating pipes respectively installed in each of the mounting grooves. A bending portion is respectively provided at both ends of the mounting groove of each of the diverter nozzle groups located in the middle to shorten the distance between adjacent mounting grooves.

2. The heating manifold for an injection molding machine according to claim 1, characterized in that: When the number of the flow-dividing nozzle groups is an even number, the main nozzle is arranged at the midpoint of all the flow-dividing nozzle groups to equally divide all the flow-dividing nozzle groups.

3. The heating manifold for an injection molding machine according to claim 1, characterized in that: When the number of the diverter nozzle groups is an odd number, the main nozzle is arranged on one side of the diverter nozzle group located at the center.

4. The heating manifold for an injection molding machine according to claim 3, characterized in that: The number of the diverter nozzle groups is 3, and the connecting lines between the two diverter nozzles in each diverter nozzle group are parallel.

5. The heating manifold for an injection molding machine according to claim 4, characterized in that: The plate body includes three main plate bodies arranged at intervals, and a connecting portion arranged between adjacent main plate bodies, the two diversion groups of each diversion nozzle group are symmetrically arranged at both ends of the main plate body, the main nozzle is arranged on the connecting portion, and the main nozzle is at the same distance from the two diversion nozzles of each diversion nozzle group.

6. The heating manifold for an injection molding machine according to claim 5, characterized in that: The end notches of the bent portion are respectively arranged on both sides of the connecting portion.

7. The heating manifold for an injection molding machine according to claim 1, characterized in that: The bottom of the mounting groove is in an arc shape, the cross-sectional diameter of the heating tube is the same as the cross-sectional diameter of the bottom of the mounting groove, and the groove depth of the mounting groove is greater than the cross-sectional diameter of the heating tube.

8. The heating manifold for an injection molding machine according to claim 1, characterized in that: The heating components are respectively arranged on the top and bottom of the plate body.

9. The heating manifold for an injection molding machine according to claim 1, characterized in that: The passage includes branch channels respectively connected to the two diverter nozzles of each diverter nozzle group, and main channels respectively connected to each branch channel and the main nozzle.

Images