Anti-reverse material guiding device

Abstract

The utility model discloses an anti-reverse material guiding device in the technical field of rectifier bridges, which comprises a tray comprising a groove disc, and the groove bottom of the groove disc is provided with a plurality of anti-reverse holes; the material guiding box comprises a material guiding plate, and a plurality of material guiding through grooves and a plurality of linear inserting grooves are formed in the top of the material guiding box; the sliver comprises a holding strip which is transversely arranged, and a plurality of stop levers which are arranged on one side of the holding strip and are in one-to-one correspondence with the linear slots; the anti-reversion bottom plate comprises a base plate, a limiting groove is formed in the top of the anti-reversion bottom plate, and a plurality of anti-reversion ejector pins are arranged at the groove bottom of the limiting groove and correspond to the anti-reversion holes one to one; the plurality of positioning assemblies are mounted on the substrate, and the number of the positioning assemblies is equal to the group number of the rubber shells; according to the utility model, a plurality of pin frames on a welding die can be simultaneously unloaded and placed in the rubber shell, the operation is simple, the efficiency is high, the correctness of the placing position of the rubber shell can be automatically confirmed, mistakes and omissions are avoided, the placement is regular, and the reject ratio is obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rectifier bridges, in particular to a material reverse guiding device. Background Art

[0002] GBPC rectifier bridge (square general package rectifier bridge) is a rectifier component that converts AC power into DC power. It generally includes a lead frame, four rectifier diode chips, two positive and two negative, welded on the lead frame, and a plastic shell for protecting the package. The four pins on the lead frame are used to connect to the circuit.

[0003] In the production process, the rectifier diode chip and the lead frame are first assembled and welded through a welding mold, then demolded, and then glue is poured into the plastic shell. Subsequently, the lead frame with four rectifier diode chips is placed into the plastic shell in a certain direction, and the glue is waited for to solidify, and the production is completed.

[0004] In order to improve production efficiency during the production of existing GBPC rectifier bridges, Fig.11 As shown in the figure, a welding mold is used to weld a group of lead frames arranged in an array at the same time. However, in the subsequent steps, the lead frames need to be unmolded first, and then manually placed one by one in a certain direction into the plastic shell after the glue is poured. The operation is cumbersome and inefficient. It is easy to make mistakes when manually confirming the direction, and it is easy to cause defects such as material deformation and skewed position during the operation. Utility Model Content

[0005] The utility model aims to provide an anti-reverse material guiding device, which solves the technical problems in the prior art that the packaging operation of the GBPC rectifier bridge is cumbersome, inefficient, and easy to make mistakes in manual anti-reverse and easily cause material deformation, skewed position and the like during operation.

[0006] The utility model discloses a device for preventing reverse material guiding, comprising:

[0007] Pallet, including

[0008] A slot plate is used to limit and contain multiple groups of plastic shells arranged in a rectangular array, and a plurality of anti-reflection holes are opened at the bottom of the slot plate, and the anti-reflection holes correspond to the missing corners of the plastic shells one by one;

[0009] Guide box, including

[0010] A material guide plate, with a plurality of vertically arranged material guide slots and a plurality of horizontally arranged linear slots on the top, the material guide slots are arranged in a rectangular array and correspond to a group of plastic shells, the number of the linear slots is equal to the number of columns of the material guide slots, and the linear slots pass through each column of the material guide slots in a one-to-one correspondence;

[0011] Comb strips, including

[0012] Grip bar, horizontal setting,

[0013] A plurality of blocking rods are arranged on one side of the gripping bar and correspond one to one with the linear slots;

[0014] Anti-reflection bottom plate, including

[0015] The base plate has a limiting groove on the top adapted to the tray, and a plurality of anti-reverse ejector pins are arranged at the bottom of the limiting groove, and the anti-reverse ejector pins correspond to the anti-reverse holes one by one;

[0016] A plurality of positioning components are installed on the base plate, and the number of the positioning components is equal to the number of the plastic shell groups, and are used to position the material guide box.

[0017] This new experimental model can simultaneously unmold multiple pin frames on the welding mold and place them into the plastic shell by setting up a material guide box, a comb strip and an anti-reverse bottom plate. The operation is simple and efficient. The anti-reverse ejector pin and the anti-reverse hole are used to confirm the correctness of the plastic shell placement position, avoid errors and omissions, and the placement is neat, which significantly reduces the defective rate.

[0018] On the basis of the above technical solution, the solution of this application can also be improved as follows:

[0019] Preferably, the tray further comprises:

[0020] Two support plates are respectively installed on the left and right sides of the trough plate; adopting this solution, it is convenient for operators to grab with both hands, thereby improving the stability of transportation.

[0021] Preferably, the support plate is an integrally formed part, comprising

[0022] Z-segment;

[0023] The L-shaped section is connected to the groove plate on the outside and connected to the Z-shaped section on the top. This solution is convenient for production and processing, has a high degree of connection stability with the groove plate, and improves the assembly efficiency of the support plate.

[0024] Preferably, the base plate and the limiting groove are both rectangular structures, and their axes are arranged to coincide with each other;

[0025] A first chamfer is provided at one corner of the base plate, and a second chamfer is provided at one corner of the support plate, and the positions of the first chamfer and the second chamfer correspond to the positions of the missing corners of the plastic shell. By adopting this solution, the tray can be quickly and correctly placed in the limiting groove, thereby improving the placement efficiency and production efficiency.

[0026] Preferably, the positioning component comprises:

[0027] Two limit bars are respectively arranged at the front and rear sides of the limit slot.

[0028] Two first positioning columns are respectively installed on the limiting strips;

[0029] The guide plate comprises

[0030] The upper plate has positioning holes on the front and rear sides respectively matching the first positioning columns.

[0031] The lower plate is installed at the bottom of the upper plate, and the front and rear sides of the lower plate can respectively fit with the two limit strips; by adopting this solution, the positioning and locking can be completed quickly and stably, the positioning efficiency is high, and the structure is simple and stable, which is easy to produce.

[0032] Preferably, the material guide box further comprises:

[0033] Two gripping blocks are respectively installed on the front and rear sides of the upper plate;

[0034] Among them, a plurality of through holes are opened on the outer side of one of the holding blocks, and a plurality of limiting holes are opened on the inner side of the other holding block, and the through holes and the limiting holes correspond one by one to the linear slots; adopting this solution, it is convenient for operators to carry the material guide box, and it can also limit and guide the baffle rod, which reduces the difficulty of operation and improves production efficiency.

[0035] Preferably, a plurality of second positioning columns are provided on the top of the material guide plate, and the second positioning columns correspond one-to-one to the positioning grooves provided at the bottom of the welding mold; by adopting this solution, the welding groove can be accurately aligned with the material guide groove, and no misalignment will occur during the material guiding process, thereby improving the material guiding stability and accuracy.

[0036] Preferably, it also includes:

[0037] The pressure plate has a handle on the top surface; by adopting this solution, all the lead frames can be pushed away from the welding slots at one time, which significantly improves the production efficiency and solves the problem of material jamming.

[0038] Through the above technical solution, the utility model achieves the following beneficial effects:

[0039] 1. The present application can simultaneously remove the molds of multiple lead frames on the welding mold and place them inside the plastic shell by setting a material guide box, a comb bar and an anti-reverse bottom plate. The operation is simple and efficient. The anti-reverse ejector pin and the anti-reverse hole are used to confirm the correctness of the plastic shell placement position, avoid mistakes and omissions, and place them neatly, which significantly reduces the defective rate;

[0040] 2. The present application limits the lower plate by two limit bars, and then connects the first positioning column with the positioning hole of the upper plate to complete the positioning of the material guide box. It can quickly and firmly complete the positioning and locking, has high positioning efficiency, and has a simple and stable structure, which is easy to produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a top view of the anti-reflection bottom plate described in a specific embodiment of the utility model;

[0043] Figure 2 for Figure 1 A front cross-sectional view of the anti-reflection bottom plate shown;

[0044] Figure 3 for Figure 1 A side cross-sectional view of the anti-reflection bottom plate shown;

[0045] Figure 4 A top view of a tray according to a specific embodiment of the utility model;

[0046] Figure 5 for Figure 4 a front cross-sectional view of the tray shown;

[0047] Figure 6 for Figure 4 a top cross-sectional view of the tray shown;

[0048] Figure 7 It is a top view of the material guide box described in a specific embodiment of the utility model;

[0049] Figure 8 for Figure 7 A side cross-sectional view of the guide box shown;

[0050] Fig. 9 A top view of a comb strip according to a specific embodiment of the utility model;

[0051] Fig.10 A top view of a pressing plate according to a specific embodiment of the utility model;

[0052] Fig.11 It is a top view of a welding mold in the prior art;

[0053] Fig.12It is a top view of the plastic shell described in a specific embodiment of the utility model;

[0054] Fig.13 A top view of a lead frame according to a specific embodiment of the utility model;

[0055] Fig.14 It is a side cross-sectional view of the anti-backward material guiding device according to a specific embodiment of the utility model when in use;

[0056] Description of reference numerals:

[0057] 1. Tray; 2. Material guide box; 3. Comb strip; 4. Anti-reverse bottom plate; 5. Pressing plate;

[0058] 11. slot plate; 12. support plate; 21. guide plate; 22. gripping block; 31. gripping strip; 32. stopper; 41. base plate; 42. positioning assembly; 51. handle;

[0059] 111, anti-reverse hole; 121, Z-shaped section; 122, L-shaped section; 123, second chamfer; 211, upper plate; 212, lower plate; 213, second positioning column; 221, through hole; 222, limiting hole; 411, limiting groove; 412, anti-reverse ejector pin; 413, first chamfer; 421, limiting strip; 422, first positioning column; 211a, material guide groove; 211b, linear slot; 211c, positioning hole. DETAILED DESCRIPTION

[0060] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0061] First of all, it should be noted that in the following description, some directional words involved in order to clearly illustrate the technical solution of the utility model, such as "front and rear sides", "left and right sides", etc., are all meanings that are inferred from the normal directions of the components in the anti-back-guiding device. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0063] In this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0064] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0065] Example:

[0066] The embodiment of the present application discloses an anti-reverse material guiding device, which is used to install lead frames in batches into plastic shells. The specific structure thereof includes: a tray 1, a material guiding box 2, a comb strip 3 and an anti-reverse bottom plate 4.

[0067] It should be noted that if Fig.12 As shown, the plastic shell has a square structure and a notch at one corner for positioning, and has a receiving groove for accommodating the lead frame, and the receiving groove is also in a square notch shape; and the notch of the plastic shell plays a positioning role to prevent the GBPC rectifier bridge from being placed upside down when in use.

[0068] It should be noted that if Fig.13 As shown, the lead frame is adapted to the shape and size of the receiving groove, so that accurate positioning can be ensured after placement.

[0069] like Figures 4 to 6 As shown, the tray 1 comprises:

[0070] The groove plate 11 is used to limit and contain multiple groups of plastic shells arranged in a rectangular array, and a plurality of anti-reflection holes 111 are opened at the bottom of the groove plate 11, and the anti-reflection holes 111 correspond to the missing corners of the plastic shells one by one.

[0071] Exemplarily, the slot plate 11 is of a rectangular structure, and its shape and size are adapted to the multiple groups of plastic shells contained therein, so as to limit the position of the plastic shells contained therein.

[0072] Preferably, the slot tray 11 contains two groups of plastic shells arranged on the left and right, and each group of plastic shells is arranged in an array of five rows and five columns, totaling twenty-five; but not limited to this, the slot tray 11 can also contain three, four or more groups of plastic shells, as long as the number and arrangement of each group of plastic shells correspond one-to-one to the welding slots on a welding mold, without specific limitation.

[0073] like Figures 7-8 As shown, the material guide box 2 includes:

[0074] The material guide plate 21 has a plurality of vertically arranged material guide slots 211a and a plurality of horizontally arranged linear slots 211b on the top. The material guide slots 211a are arranged in a rectangular array and correspond to a group of plastic shells. The number of the linear slots 211b is equal to the number of columns of the material guide slots 211a, and the linear slots 211b pass through each column of the material guide slots 211a in a one-to-one correspondence.

[0075] Exemplarily, the material guide slot 211a is a square structure adapted to the lead frame, and semicircular avoidance slots are provided at the four corners to reduce the probability of material jamming. The linear slot 211b is preferably open at the top, so as to facilitate observation by operators, which improves the use effect.

[0076] like Fig. 9 As shown, the comb strip 3 comprises:

[0077] A gripping strip 31, arranged horizontally;

[0078] A plurality of blocking rods 32 are disposed on one side of the gripping bar 31 and correspond one to one with the linear slots 211 b ; the blocking rods 32 are slender cylindrical structures with tapered ends for easy insertion.

[0079] like Figures 1 to 3 As shown, the anti-rebound bottom plate 4 includes:

[0080] The base plate 41 has a limiting groove 411 on the top adapted to the tray 1, and a plurality of anti-reverse ejector pins 412 are provided at the bottom of the limiting groove 411, and the anti-reverse ejector pins 412 correspond to the anti-reverse holes 111 one by one;

[0081] A plurality of positioning components 42 are mounted on the base plate 41 , and the number of the positioning components 42 is equal to the number of the plastic shells, and are used to position the material guide box 2 .

[0082] The operation mode of the above technical solution is as follows:

[0083] Step 1: Place the plastic shells in a mutually fitting manner in the slot plate 11 of the tray 1 until it is full. At this time, the plastic shells are limited in position to form multiple groups and are arranged in an array.

[0084] Step 2: Glue is poured into the plastic shell in the slot tray 11, and then the tray 1 is placed in the limiting groove 411 of the base plate 41, so that the anti-reverse ejector pins 412 pass through the anti-reverse holes 111 one by one. If a plastic shell is placed upside down in step 1, the missing corner of the plastic shell will not correspond to the anti-reverse hole 111 here, so the anti-reverse ejector pins 412 will lift up the plastic shell, so that the operator can accurately identify it and manually put it straight.

[0085] Step 3: Place the material guide box 2 on the tray 1 and limit it by a positioning assembly 42 , so that the material guide slot 211 a forms a one-to-one correspondence with a group of plastic shells in the slot tray 11 .

[0086] Step 4: The operator holds the holding strip 31 on the comb strip 3, and uses the blocking rod 32 to limit the pin frame in the welding slot on the welding mold, and then turns the welding mold over and places it on the material guide box 2, so that each welding slot corresponds to the material guide groove 211a one by one. During this process, the pin frame in the welding slot will not fall off due to the obstruction of the comb strip 3.

[0087] Step 5: Pull out the comb strip 3 horizontally, and after the obstruction of the comb strip 3 is removed, place the welding mold downward until it is in contact with the top of the material guide box 2. Then, the pin frames in each welding slot will accurately fall into the corresponding plastic shell in the slot plate 11 along the guidance of the material guide slot 211a.

[0088] Step 6: If Fig.14 As shown, the blocking rod 32 on the comb strip 3 is horizontally inserted into the corresponding linear slot 211b, and then the welding mold is removed upward. Since the pins of some pin frames have not been detached from the welding slots, the pin frames of this part will be moved upward together with the welding mold, and then blocked by the blocking rod 32, and finally fall into the plastic shell after being detached from the welding slots.

[0089] Step seven: pull out the comb strip 3, and then remove the material guide box 2 from the anti-reverse bottom plate 4.

[0090] Step 8: Repeat steps 3 to 7 until all the groups of plastic shells in the tray 11 are filled with lead frames, and then take the tray 1 out of the limiting groove 411 .

[0091] The utility model can simultaneously unmold multiple lead frames on the welding mold and place them into the inside of the plastic shell by arranging the material guide box 2, the comb strip 3 and the anti-reverse bottom plate 4. The operation is simple and efficient. The anti-reverse ejector pin 412 and the anti-reverse hole 111 cooperate to confirm the correctness of the placement position of the plastic shell, avoid mistakes and omissions, and place them neatly, which significantly reduces the defective rate.

[0092] In some embodiments, Figures 4 to 6 As shown, for easy access, the tray 1 also includes:

[0093] Two support plates 12 are respectively installed on the left and right sides of the trough plate 11. By providing the support plates 12, it is convenient for operators to grab with both hands, thereby improving the stability of transportation.

[0094] For example, Figure 5 As shown, the support plate 12 is an integrally formed part, comprising:

[0095] The Z-shaped section 121 has a stepped structure to improve regularity;

[0096] The L-shaped section 122 is connected to the groove plate 11 at its outer side, and connected to the Z-shaped section 121 at its top. The outer side of the L-shaped section 122 is attached to and welded to the groove plate 11, and the connection is highly stable.

[0097] The above structural design of the support plate 12 facilitates production and processing, and the connection with the trough plate 11 is highly stable, and the assembly efficiency of the support plate 12 is improved.

[0098] In some embodiments, Figure 1 and Figure 6 As shown, in order to improve production efficiency, the base plate 41 and the limiting groove 411 are both rectangular structures, and the axes of the two are arranged to coincide with each other;

[0099] A first chamfer 413 is provided at one corner of the base plate 41 , and a second chamfer 123 is provided at one corner of the support plate 12 . The positions of the first chamfer 413 and the second chamfer 123 both correspond to the positions of the missing corners of the plastic shell.

[0100] Through the structural design of the first chamfer 413 and the second chamfer 123, the tray 1 can be quickly and correctly placed in the limiting groove 411, thereby improving the placement efficiency and further improving the production efficiency.

[0101] In some embodiments, Figures 1 to 3 As shown, the positioning assembly 42 includes:

[0102] Two limiting strips 421 are respectively arranged at the front and rear sides of the limiting groove 411;

[0103] The two first positioning columns 422 are respectively installed on the limiting bars 421 .

[0104] Exemplarily, the limit strip 421 is composed of two upper and lower rectangular blocks, which are connected to the base plate 41 by bolts; a stepped hole is provided on the bottom plate of the upper block, and the first positioning column 422 is a bolt-type structure adapted to the stepped hole; it is easy to assemble and produce, and the connection is stable.

[0105] like Figure 7 and Figure 8 As shown, the guide plate 21 includes:

[0106] The upper plate 211 has positioning holes 211c respectively formed on the front and rear sides thereof to match the first positioning columns 422. The upper plate 211 is in a rectangular structure with high regularity.

[0107] The lower plate 212 is installed at the bottom of the upper plate 211, and the front and rear sides of the lower plate 212 can respectively keep in contact with the two limit strips 421; the lower plate 212 is a rectangular structure and the left and right sides are flush with the upper plate 211, and the regularity is high.

[0108] During positioning, the two limiting bars 421 first limit the lower plate 212 so that it can only move left and right, and then the first positioning column 422 is plugged into the positioning hole 211 c, thereby completing the positioning of the material guide box 2.

[0109] Through the structural design of the positioning component 42 and the guide plate 21, the positioning and locking can be completed quickly and stably, the positioning efficiency is high, the structure is simple and stable, and it is easy to produce.

[0110] In some embodiments, Figure 7 and Figure 8 As shown, for easy handling, the material guide box 2 also includes:

[0111] Two gripping blocks 22 are respectively installed on the front and rear sides of the upper plate 211; the cross section of the gripping block 22 is preferably L-shaped, and a rectangular groove is provided at the outer bottom along the axial direction, so as to facilitate the operator to hold and improve the stability when holding;

[0112] A plurality of through holes 221 are formed on the outer side of one holding block 22 , and a plurality of limiting holes 222 are formed on the inner side of the other holding block 22 . The through holes 221 and the limiting holes 222 correspond to the linear slots 211 b one by one.

[0113] When inserting the comb strip 3, the blocking rod 32 is inserted from the through hole 221, and then inserted into the limiting hole 222 after passing through the linear slot 211b, so that it is limited and cannot swing.

[0114] The holding block 22 can be provided to facilitate operators to carry the material guide box 2, and the through hole 221 and the limiting hole 222 can be provided to limit and guide the blocking rod 32, thereby reducing the difficulty of operation and improving production efficiency.

[0115] Based on the above technical solution, Figure 7 As shown, in order to improve the material guiding stability, a plurality of second positioning posts 213 are provided on the top of the material guiding plate 21 , and the second positioning posts 213 correspond one-to-one to the positioning grooves provided on the bottom of the welding mold.

[0116] In the above step five, the positioning groove opened at the bottom of the welding mold can be plugged into the second positioning column 213 to ensure that the welding groove can be accurately aligned with the material guiding groove 211a, and no misalignment will occur during the material guiding process, which significantly improves the material guiding stability and accuracy.

[0117] In some embodiments, Fig.10 and Fig.11 As shown, in order to improve the material guiding efficiency, it also includes:

[0118] The top surface of the pressing plate 5 is provided with a handle 51, which is convenient for operators to hold and improves the stability and convenience of grasping.

[0119] It is understandable that during welding, the pins on the pin frame will extend to the top surface of the welding mold through the corresponding through holes on the welding slot, so that the welded pin frame will be tightly combined with the welding slot, and there is a large friction between the two, so it is not easy to detach from the welding slot.

[0120] Therefore, in the above step five, the operator pushes the pins extending to the top surface of the welding mold through the pressure plate 5, so that all the pin frames can be pushed out of the welding slots at one time, which significantly improves production efficiency and solves the problem of material jamming.

[0121] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A device for preventing reverse material conduction, characterized in that: include: Tray (1), including A slot plate (11) is used to limit and contain a plurality of groups of plastic shells arranged in a rectangular array, and a plurality of anti-reflection holes (111) are provided at the bottom of the slot plate (11), and the anti-reflection holes (111) correspond one-to-one to the missing corners of the plastic shells; The material guide box (2) includes A material guide plate (21) is provided with a plurality of vertically arranged material guide slots (211a) and a plurality of horizontally arranged linear slots (211b) on the top, wherein the material guide slots (211a) are arranged in a rectangular array and correspond to a group of plastic shells, and the number of the linear slots (211b) is equal to the number of columns of the material guide slots (211a), and the linear slots (211b) pass through each column of the material guide slots (211a) in a one-to-one correspondence; Comb (3), including The gripping strip (31) is arranged horizontally, A plurality of blocking rods (32) are arranged on one side of the gripping strip (31) and correspond one-to-one to the linear slots (211b); Anti-reflection bottom plate (4), including The base plate (41) has a limiting groove (411) on the top thereof adapted to the tray (1), and a plurality of anti-reverse ejector pins (412) are provided at the bottom of the limiting groove (411), and the anti-reverse ejector pins (412) correspond one-to-one to the anti-reverse holes (111); A plurality of positioning components (42) are mounted on the base plate (41), and the number of the positioning components is equal to the number of groups of plastic shells, and are used to position the material guide box (2).

2. The anti-backflow material guiding device according to claim 1, characterized in that: The tray (1) further comprises: Two support plates (12) are respectively installed on the left and right sides of the trough plate (11).

3. The anti-backflow material guiding device according to claim 2, characterized in that: The support plate (12) is an integrally formed part, comprising Z-shaped segment (121); The L-shaped section (122) is connected to the groove plate (11) at its outer side and connected to the Z-shaped section (121) at its top end.

4. The anti-backflow material guiding device according to claim 2, characterized in that: The base plate (41) and the limiting groove (411) are both rectangular structures, and the axes of the two are arranged to coincide with each other; A first chamfer (413) is provided at one corner of the base plate (41), and a second chamfer (123) is provided at one corner of the support plate (12), and the positions of the first chamfer (413) and the second chamfer (123) both correspond to the positions of the missing corners of the plastic shell.

5. The anti-backflow material guiding device according to claim 1, characterized in that: The positioning assembly (42) comprises: Two limiting strips (421) are respectively arranged at the front and rear sides of the limiting groove (411). Two first positioning columns (422) are respectively installed on the limiting strips (421); The guide plate (21) comprises The upper plate (211) has positioning holes (211c) on both the front and rear sides respectively matching the first positioning columns (422). The lower plate (212) is installed at the bottom of the upper plate (211), and the front and rear sides of the lower plate (212) can respectively keep in contact with the two limit strips (421).

6. The anti-backflow material guiding device according to claim 5, characterized in that: The material guide box (2) further comprises: Two gripping blocks (22) are respectively mounted on the front and rear sides of the upper plate (211); A plurality of through holes (221) are provided on the outer side of one of the gripping blocks (22), and a plurality of limiting holes (222) are provided on the inner side of the other gripping block (22), and the through holes (221) and the limiting holes (222) correspond one-to-one to the linear slots (211b).

7. The anti-backflow material guiding device according to claim 1, characterized in that: A plurality of second positioning columns (213) are provided on the top of the guide plate (21), and the second positioning columns (213) correspond one-to-one to the positioning grooves provided on the bottom of the welding mold.

8. The anti-backflow material guiding device according to claim 1, characterized in that: Also includes: The pressing plate (5) has a handle (51) on its top surface.

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