Cross beam injection mold

Abstract

The utility model discloses a cross beam injection mold. The cross beam injection mold comprises a mold frame, a mold core and a sprue assembly. The mold core is arranged in the mold frame to define a cavity, the mold core comprises a first connecting section, a second connecting section and a middle section, the first connecting section and the second connecting section are located at the two opposite ends of the middle section respectively, the middle section has multiple types, and the lengths of the middle sections of different types are different; the multiple types of middle sections are selectively arranged between the first connecting section and the second connecting section. The sprue assembly is arranged on the mold frame to define an injection molding channel, and the injection molding channel communicates with the mold cavity. The problem that in the prior art, multiple sets of molds are needed for producing cross beams of various lengths, and consequently the manufacturing cost of the molds is high is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cutting device, in particular to a crossbeam injection mold. BACKGROUND

[0002] The laser cutting machine is a machine that emits laser from a laser, focuses into high-power density laser beam through optical system, and makes the laser beam irradiate to the workpiece surface, so that the workpiece reaches the melting point or boiling point to complete the cutting. The laser cutting machine replaces the traditional mechanical cutter with high-energy light beam. Compared with the traditional mechanical cutting machine, it not only has high precision, smooth cutting edge without burr after cutting, and no need for further processing, but also cuts quickly.

[0003] The crossbeam in the laser cutting machine is placed on the guide rail of the bed, and the laser cutting head is installed on the crossbeam. The movement of the crossbeam on the guide rail of the bed is driven by a motor. However, in the prior art, a set of mold can only produce a crossbeam of one length, and multiple sets of molds are needed to produce crossbeams of multiple lengths, resulting in high manufacturing cost of the mold. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a crossbeam injection mold to solve the problem of high manufacturing cost of the mold caused by the need for multiple sets of molds to produce crossbeams of multiple lengths mentioned in the background.

[0005] According to one aspect of the present application, a crossbeam injection mold is provided, comprising:

[0006] a mold frame;

[0007] a mold core, the mold core is arranged in the mold frame to define a cavity, the mold core comprises a first connecting section, a second connecting section and an intermediate section, the first connecting section and the second connecting section are respectively located at opposite ends of the intermediate section, the intermediate section has multiple models, the lengths of the intermediate sections of different models are different, and the intermediate sections of multiple models are selectively arranged between the first connecting section and the second connecting section;

[0008] a gate assembly, the gate assembly is arranged in the mold frame to define an injection channel, the injection channel is in communication with the cavity.

[0009] Further, the cross sections of the intermediate section, the first connecting section and the second connecting section are the same.

[0010] Further, the gate assembly comprises:

[0011] an inner gate end, the inner gate end is fixed to the mold frame and extends into the cavity;

[0012] an outer gate end, the outer gate end is connected to the inner gate end, and the outer gate end extends out of the mold frame.

[0013] Further, the inner gate includes:

[0014] A strip-shaped member is arranged in the mold frame and extends along the length direction of the mold core, and the strip-shaped member is connected with the outer gate.

[0015] A plurality of connecting rods are connected to the strip-shaped member, and the plurality of connecting rods are arranged at intervals along the length direction of the strip-shaped member, and one end of each connecting rod away from the strip-shaped member extends into the cavity.

[0016] Further, along the length direction of the mold core, the intervals between adjacent connecting rods are equal.

[0017] Further, the outer gate includes a guide column connected to the middle part of the strip-shaped member.

[0018] Further, the gate assembly further includes a riser block for defining a riser channel, and the riser channel is in communication with the cavity.

[0019] Further, the riser channel includes a plurality of riser channels arranged at intervals along the length direction of the mold core, and the plurality of riser channels are respectively in communication with the cavity.

[0020] Further, along the length direction of the mold core, the intervals between adjacent riser channels are equal.

[0021] Further, the beam injection mold further includes:

[0022] A chill is arranged in the mold frame, and one side of the chill close to the cavity forms an inner wall side of the cavity, and the chill is used to contact the injection material.

[0023] In the present application, by dividing the mold core into a first connecting section, a second connecting section and a plurality of intermediate sections of different types, the mold core provided by the present application realizes modular design. By replacing intermediate sections of different lengths, the beam injection mold can produce beams of different lengths. The present application uses a set of beam injection molds to produce beams of multiple lengths, greatly reducing the manufacturing cost of the beam injection mold, improving the manufacturing efficiency of beams of multiple lengths, and improving the production flexibility of the beams. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0025] Fig. 1Schematic view of two sets of cores (the middle section of the two sets of cores are different in shape) disclosed in the present application;

[0026] Fig. 2 Schematic view of a gate assembly disclosed in the present application;

[0027] Fig. 3 Schematic view of a riser block disclosed in the present application.

[0028] Wherein, the above-mentioned drawings include the following reference signs:

[0029] 10, core; 11, first connecting section; 12, second connecting section; 13, middle section; 20, gate assembly; 21, inner gate end; 211, bar-shaped member; 212, connecting rod; 22, outer gate end; 221, guide post; 23, riser block. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] The relative arrangement of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. Techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification where appropriate. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] As Figs. 1 to 3As shown, the present application provides a beam injection mold. The beam injection mold comprises a mold frame, a mold core 10 and a gate assembly 20. The mold core 10 is arranged in the mold frame to define a cavity. The mold core 10 comprises a first connecting section 11, a second connecting section 12 and a middle section 13. The first connecting section 11 and the second connecting section 12 are respectively located at opposite ends of the middle section 13. The middle section 13 has multiple models, and the lengths of the middle sections 13 of different models are different. The multiple models of the middle section 13 are selectively arranged between the first connecting section 11 and the second connecting section 12. The gate assembly 20 is arranged in the mold frame to define an injection channel, and the injection channel is communicated with the cavity.

[0034] In this embodiment, by dividing the mold core 10 into the first connecting section 11, the second connecting section 12 and the multiple models of the middle section 13, the mold core 10 provided by the present application realizes modular design. By replacing the middle sections 13 with different lengths, the beam injection mold can produce beams with different lengths. In this embodiment, one set of beam injection mold can produce beams with multiple lengths, which greatly reduces the manufacturing cost of the beam injection mold, improves the manufacturing efficiency of beams with multiple lengths, and improves the production flexibility of the beams.

[0035] Specifically, the mold frame can be arranged as an upper mold frame and a lower mold frame. The upper mold frame and the lower mold frame are spliced on the side close to each other to form the mold frame. The middle section 13 of the required model is arranged between the first connecting section 11 and the second connecting section 12 to form the mold core 10 of the beam of the required model. Then the mold core 10 is placed between the upper mold frame and the lower mold frame, so that the upper mold frame and the lower mold frame can define a cavity corresponding to the beam of the required model. When the upper mold frame and the lower mold frame are relatively close until the mold closing state, the injection material can be injected into the cavity. After the injection material cools and forms, the beam of the required model is formed. After the injection is completed, the upper mold frame and the lower mold frame are relatively far away until the mold opening state, and the beam of the required model after the injection is completed can be taken out. Therefore, by replacing the middle sections 13 with different lengths, the beam injection mold can produce beams with different lengths, and one set of beam injection mold can produce beams with multiple lengths, which is beneficial to reduce the manufacturing cost of the beams.

[0036] In this embodiment, the sand material is filled between the upper mold frame and the lower mold frame, and the mold core 10 is placed in the sand material to define the cavity. Generally, the sand material is mainly composed of raw sand, binder and auxiliary materials mixed in a certain proportion. The sand material has high strength and thermal stability, and can withstand various external forces and high temperature. The sand material also has certain plasticity, which deforms under external force and can maintain and define the cavity after the external force is removed. The sand material also has good air permeability, that is, the ability of the sand material pores to permeate gas is relatively good. Part of the air in the beam injection mold can be discharged to the outside of the mold frame through the sand material, which is beneficial to reduce the defects such as pores and shrinkage holes generated in the beam casting.

[0037] Further, the cross sections of the intermediate section 13, the first connecting section 11 and the second connecting section 12 are the same. Different types of intermediate sections 13 can be seamlessly and accurately replaced between the first connecting section 11 and the second connecting section 12, which ensures that the sizes of different types of intermediate sections 13 can be accurately matched with the first connecting section 11 and the second connecting section 12, improving the flexibility and versatility of the cross beam injection mold. At the same time, the cross sections of different types of intermediate sections 13 are the same, which is more convenient for replacement operation, reduces errors caused by size differences of cross sections, and is beneficial to improve the quality of the cross beam.

[0038] Further, the first connecting piece and the intermediate section 13, the second connecting piece and the intermediate section 13 can be connected and fixed by mortise and tenon joint, buckle and other connecting structures, which further ensures the stability of the mold core 10 and is beneficial to improve the accuracy of the produced cross beam.

[0039] Further, the sprue assembly 20 includes an inner gate end 21 and an outer gate end 22. The inner gate end 21 is fixed to the mold frame and extends into the cavity. The outer gate end 22 is connected to the inner gate end 21, and the outer gate end 22 extends out of the mold frame. The inner gate end 21 and the outer gate end 22 can define an injection channel, with one end of the injection channel communicating with the cavity and the other end communicating with the space outside the mold frame. The injection material can flow into the cavity from the injection channel until the cavity is filled with the injection material.

[0040] Further, the inner gate end 21 includes a strip-shaped piece 211 and a connecting rod 212. The strip-shaped piece 211 is arranged in the mold frame and extends along the length direction of the mold core 10, and the strip-shaped piece 211 is connected to the outer gate end 22. The connecting rod 212 is connected to the strip-shaped piece 211. The connecting rod 212 includes a plurality of connecting rods 212, which are arranged at intervals along the length direction of the strip-shaped piece 211. The end of each connecting rod 212 away from the strip-shaped piece 211 extends into the cavity. The strip-shaped piece 211 and the connecting rod 212 can define an injection channel. The plurality of connecting rods 212 are arranged at intervals along the length direction of the strip-shaped piece 211, so that the injection material can be more uniformly distributed and flow into each part of the cavity, ensuring that the size accuracy and quality of the cross beam are better. In addition, the plurality of injection channels formed by the plurality of connecting rods 212 simultaneously inject the injection material into the cavity, which can effectively speed up the mold filling speed and shorten the injection time, which is beneficial to improve the injection efficiency.

[0041] Further, along the length direction of the mold core 10, the spacing between adjacent connecting rods 212 is equal, which ensures that the injection material can be more evenly distributed when flowing into the cavity. Each connecting rod 212 bears similar injection material flow, avoiding quality problems of the cross beam caused by uneven injection material flow. At the same time, the spacing between the connecting rods 212 is the same, which is also convenient for producing the inner gate end 21, can improve the manufacturing efficiency of the inner gate end 21, and ensure the manufacturing accuracy of the cross beam injection mold.

[0042] The strip-shaped member 211 and the connecting rod 212 can be provided in a cylindrical structure. The strip-shaped member 211 and the connecting rod 212 in the cylindrical structure define a smooth inner surface of the injection channel, so that the injection material can flow more smoothly and quickly into the cavity along the injection channel. Specifically, the cross-sectional area of the end of the connecting rod 212 close to the cavity is small, which facilitates the removal of the excess solid part on the beam after the injection material is solidified and formed.

[0043] Further, the outer gate end 22 includes a guide column 221 connected to the middle part of the strip-shaped member 211. The guide column 221 can define a part of the injection channel close to the outside of the mold frame. The guide column 221 is connected to the middle part of the strip-shaped member 211, so that the part of the injection channel close to the outside of the mold frame is located in the middle part of the part of the injection channel close to the cavity. The part of the injection channel close to the outside of the mold frame helps to guide the injection material to flow more uniformly into the part of the injection channel close to the cavity, further ensuring that the injection material can be more uniformly distributed when flowing into the cavity, so that the injection material can more smoothly and uniformly fill the cavity, thereby ensuring that the produced beam has higher quality.

[0044] Further, the gate assembly 20 further includes a riser block 23 for defining a riser channel, which is in communication with the cavity. During the process of filling the cavity with the injection material, in order to ensure that the injection material can fully fill the cavity, the volume of the injection material is greater than the volume of the cavity, so that part of the injection material overflows the cavity and is stored in the riser channel. At the same time, the riser channel is also used to discharge the gas in the cavity, which can effectively reduce the occurrence of defects such as pores and shrinkage holes in the produced beam, and is beneficial to improve the quality of the beam. During the injection process, the injection material can carry some impurities or incompletely melted solid particles. The riser channel can guide these impurities to flow to the riser channel area, thereby avoiding the retention of these impurities in the cavity, which is beneficial to ensure the purity of the beam. In addition, during the beam forming process, due to the solidification shrinkage of the beam, shrinkage holes or shrinkage defects can be generated in the interior of the beam. The riser block 23 defines the riser channel to provide a supplementary channel for the injection material. When the injection material in the cavity solidifies and shrinks, the injection material in the riser channel can be timely supplemented into the cavity, thereby avoiding the generation of shrinkage holes and shrinkage, and improving the density of the beam. The riser block can be provided in a prism shape, with the end of the smaller cross section extending into the cavity and the end of the larger cross section extending out of the mold frame.

[0045] Further, the sprue gates are multiple, and the multiple sprue gates are arranged at intervals along the length direction of the core 10 and respectively communicate with the cavities. The multiple sprue gates arranged at intervals along the length direction of the core 10 can ensure that the beam injection mold can uniformly exhaust gas in each area during the injection process. The multiple sprue gates can help reduce defects such as pores and shrinkage holes caused by gas retention in the beam, and can improve the quality of the beam. The multiple sprue gates can also make the gas in the beam injection mold be exhausted more quickly, reduce the retention time of the gas in the beam injection mold, and further reduce the influence of the gas on the quality of the beam. The injection material can also be more quickly supplemented to the areas requiring feeding in the cavity through the sprue gates, thereby improving the feeding efficiency.

[0046] Further, the intervals between the adjacent sprue gates along the length direction of the core 10 are equal. During the injection process, the equal-interval sprue gates can ensure that the gas in each area of the beam injection mold is uniformly exhausted. This can help reduce defects such as pores and shrinkage holes caused by gas retention, and improve the surface quality and internal structure density of the beam. The equal-interval sprue gates can also help achieve uniform feeding of the injection material during the solidification process. When the plastic part produces cavities due to cooling shrinkage, the injection material can be quickly supplemented to these areas from the multiple equal-interval sprue gates, thereby reducing the occurrence of shrinkage and loose phenomena. The equal-interval sprue gates can also reduce the resistance and vortex phenomenon of the injection material during the flow process. The injection material can more smoothly flow along the length direction of the core 10 and be uniformly distributed to each corner of the cavity, thereby improving the filling speed and filling quality.

[0047] Further, the beam injection mold also includes chills. The chills are arranged in the mold frame, and the side of the chills close to the cavity forms the inner wall side of the cavity, and the chills are used to contact the injection material. The injection material can quickly dissipate heat when contacting the chills, and the heat conduction performance of the chills is much better than that of the sandy material. The chills can significantly accelerate the cooling speed of the beam, ensure that the beam injection mold can reach the demolding temperature more quickly, thereby shortening the production cycle and improving the production efficiency. At the same time, through the local rapid cooling effect of the chills, the injection material can more uniformly shrink during the solidification process, reducing the deformation and cracking phenomena caused by uneven shrinkage. During the injection process, the beam injection mold filled with the injection material maintains a first predetermined pressure for a first predetermined time to make the injection material solidify to form a crust, then the beam injection mold filled with the injection material maintains a second predetermined pressure for a second predetermined time to make the injection material of the crust crystallize, and finally the injection material remains in the mold for a third predetermined time to make the injection material form a solid beam casting. The chills can be multiple, and the multiple chills contact the injection material on the side close to the cavity to quickly reduce the temperature of the injection material.

[0048] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated at 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0049] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0050] The preferred embodiments of the present application have been described above with the purpose of enabling not to limit the scope of protection of the present application, but of enabling a person skilled in the art to make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A beam injection mold, characterized in that, include: mold frame; Mold core (10), the mold core (10) is disposed in the mold frame to define the cavity, the mold core (10) includes a first connecting section (11), a second connecting section (12) and an intermediate section (13), the first connecting section (11) and the second connecting section (12) are respectively located at opposite ends of the intermediate section (13), the intermediate section (13) has multiple models, the length of the intermediate section (13) of different models is different, and the intermediate section (13) of multiple models can be selectively disposed between the first connecting section (11) and the second connecting section (12); A gating assembly (20) is disposed on the mold frame to define an injection channel that communicates with the cavity.

2. The beam injection mold according to claim 1, characterized in that, The cross-sections of the middle section (13), the first connecting section (11), and the second connecting section (12) are the same.

3. The beam injection mold according to claim 1, characterized in that, The gating assembly (20) includes: Inlet (21), the inlet (21) is fixed to the mold frame and extends into the cavity; Outer gating end (22), which is connected to the inner gating end (21), extends out of the mold frame.

4. The beam injection mold according to claim 3, characterized in that, The inlet end (21) includes: A strip (211) is disposed in the mold frame and extends along the length direction of the mold core (10), and the strip (211) is connected to the external gating end (22); A connecting rod (212) is connected to the strip (211). The connecting rod (212) includes multiple connecting rods, which are spaced apart along the length of the strip (211). The end of each connecting rod (212) away from the strip (211) extends into the cavity.

5. The beam injection mold according to claim 4, characterized in that, Along the length direction of the mold core (10), the spacing between adjacent connecting rods (212) is equal.

6. The beam injection mold according to claim 4, characterized in that, The external casting end (22) includes a guide post (221) which is connected to the middle of the strip (211).

7. The beam injection mold according to claim 3, characterized in that, The gating assembly (20) further includes a riser block (23) for defining a riser channel that communicates with the cavity.

8. The beam injection mold according to claim 7, characterized in that, The riser includes multiple risers, which are spaced apart along the length of the mold core (10) and are respectively connected to the cavity.

9. The beam injection mold according to claim 8, characterized in that, Along the length of the mold core (10), the spacing between adjacent riser channels is equal.

10. The beam injection mold according to claim 5, characterized in that, Also includes: A chill is disposed within the mold frame, and the side of the chill closest to the cavity forms the inner wall side of the cavity. The chill is used to contact the injection molding material.

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