A pretreatment device for household appliance molding materials

Abstract

The invention discloses a pretreatment device for household appliance molding materials, and relates to the technical field of household appliances. The invention promotes the injection molding raw materials to be spread flat in the material placement groove by closing the concave plate and the closed convex plate, thereby preventing the injection molding raw materials from being too deep, resulting in poor drying and heating effect on part of the injection molding raw materials, thereby causing different drying degrees of the injection molding raw materials inside and outside, which not only damages the injection molding raw materials located on the outside, but also affects the efficiency of removing bubbles. In addition, by relying on square fixing strips one and square fixing strips two to be clamped in square grooves one and square grooves two, the injection molding raw materials can be extremely restricted in the material placement groove, avoiding the problem of leakage. Through the fixing block, the closed concave plate and the closed convex plate can be assisted to be plugged together, so that the closed concave plate and the closed convex plate can be more tightly connected, and through the through port, the hot air inside the heating box can enter the storage block.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to a pretreatment device for molding materials of household appliances. Background Art

[0002] Injection molding is a method of producing industrial products. Products are usually made of rubber and plastics.

[0003] At present, household appliances are formed by injection molding, but the raw materials used for injection molding need to be pretreated before use to remove bubbles contained in the injection molding raw materials. Once raw materials containing bubbles are used for injection molding, it will have a great impact on the molding of household appliances. Generally, the injection molding raw materials are pretreated by heating and drying to remove the bubbles inside them. However, there will still be some bubbles inside the heating and drying device, and the injection molding raw materials need to be dried twice, which is very inconvenient. For this reason, we propose a pretreatment device for household appliance molding materials. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a pretreatment device for household appliance molding materials, comprising:

[0005] A heating box, wherein a protective plate is fixedly connected to the bottom of the heating box, a connecting block 1 is fixedly connected to the upper end of the front of the heating box, a connecting block 2 is arranged directly above the connecting block 1, a cover plate is arranged directly above the heating box, and the front of the cover plate is fixedly connected to the connecting block 2;

[0006] The first connecting block is vertically rotatably connected with a fixing rod inside, and the second connecting block is rotatably connected to the first connecting block via the fixing rod;

[0007] A positioning rod, wherein a round opening is formed on the top of the positioning rod, a central axis rod is fixedly connected inside the round opening, the central axis rod is fixedly connected to the heating box through the positioning rod, a heater is arranged at the central axis inside the heating box, and the top of the heater is fixedly connected to the bottom of the central axis rod;

[0008] The motor is arranged on the inner side of the protection plate, a large gear is fixedly connected to the top of the motor, a small gear is meshed on the outside of the large gear, a rotating rod 1 is fixedly connected to the top of the small gear, and the small gear is rotationally connected to the motor through the large gear.

[0009] Furthermore, the interior of the heating box includes a storage block, a plug block, a positioning bar, a connecting block three, an X-shaped connecting rod and a rotating rod two, the plug block is arranged on the top of the storage block, the plug block is inserted into the storage groove, the shape and size of the plug block are the same as the shape and size of the storage groove, the positioning bar is arranged on the front and rear sides of the storage block, and arc-shaped recesses are opened on both sides of the positioning bar, the connecting block three is fixedly connected to the bottom of the positioning bar, the X-shaped connecting rod is arranged directly below the storage block, the rotating rod two is fixedly connected to the X-shaped connecting rod, the bottom of the rotating rod two is connected to the small gear through the rotating rod one, and the rotating rod two is rotationally connected to the large gear through the small gear.

[0010] Furthermore, a storage groove is provided on the top of the storage block, through openings are provided on the left and right sides of the storage block, fixed blocks are provided on the front and back sides of the storage groove, the fixed blocks are slidably connected inside the storage groove, an opening is provided on the side of the fixed block close to the closed concave plate, a closed concave plate is provided on the inner side of the storage groove, the sides of the closed concave plate and the closed convex plate away from each other are in contact with the inner wall of the opening, the closed concave plate and the closed convex plate are slidably connected inside the opening of the fixed block, and a closed convex plate is adapted for the left side of the closed concave plate.

[0011] Furthermore, a square plate, an X-shaped plate, a cylindrical rod and a handle are fixedly connected to the top of the plug block, the square plate is fixedly connected to the top of the plug block, the shape and size of the square plate are the same as the shape and size of the top of the storage block, the bottom of the square plate is in contact with the top of the storage block, the X-shaped plate is fixedly connected to the top of the square plate, the cylindrical rod is fixedly connected to the bottom of the X-shaped plate, the cylindrical rod is clamped in the arc-shaped recess, and the handle is fixedly connected to the top of the square plate.

[0012] Furthermore, a material placement groove is opened at the central axis of the front face of the closed convex plate, a square groove 1 is arranged on the outer side of the material placement groove, and a square groove 2 is arranged on the outer side of the square groove 1; an extrusion plate is fixedly connected at the central axis of the front face of the closed concave plate, a square fixing strip 1 is arranged on the outer side of the extrusion plate, and a square fixing strip 2 is arranged on the outer side of the square fixing strip 1; the shape and size of the extrusion plate are matched with the shape and size of the material placement groove, the top of the extrusion plate does not contact the inner wall of the material placement groove, and the square groove 1 and the square groove 2 are matched with the square fixing strip 1 and the square fixing strip 2 respectively.

[0013] The present invention has the following beneficial effects:

[0014] The present invention enables the injection molding raw materials to be spread flat in the material placement groove by closing the concave plate and the closed convex plate, thereby preventing the injection molding raw materials from being too deep, resulting in poor drying and heating effects on part of the injection molding raw materials, thereby resulting in different drying degrees of the injection molding raw materials inside and outside, which will not only damage the injection molding raw materials located on the outside, but also affect the efficiency of removing bubbles. In addition, by relying on the square fixing strips one and two being clamped in the square grooves one and two, the injection molding raw materials can be extremely restricted in the material placement groove, avoiding the problem of leakage. The fixing block can assist the closed concave plate and the closed convex plate to be plugged together, so that the closed concave plate and the closed convex plate can be more closely connected. Through the through port, the hot air inside the heating box can enter the storage block, thereby the closed concave plate and the closed convex plate can be affected by the hot air, and the injection molding raw materials located therein can be dried and heated.

[0015] The present invention starts the motor located inside the protection plate through the protection plate, the large gear drives the small gear to rotate, the rotating rod one drives the rotating rod two to rotate, and four small gears can be driven to rotate by relying on a power source, thereby achieving the effect of driving four storage blocks to rotate at the same time, and the protection plate can support the heating box while protecting the large gear and small gear of the motor located inside it, and the force of the small gear rotation can be transmitted to the rotating rod two through the rotating rod one, so that the X-shaped connecting rod drives the storage block to rotate by relying on the positioning bar.

[0016] The present invention uses a storage block. The rotating storage block can make the closed convex plate and the closed concave plate evenly heated, further reducing the occurrence of uneven drying and heating. At the same time, the injection molding raw materials located inside can also be evenly heated, thereby improving the drying pretreatment efficiency and drying effect of the injection molding raw materials. The position of the storage block can be limited by the positioning strip, and the storage block can be fixed when it rotates to prevent the storage block from being thrown away due to centrifugal force.

[0017] The present invention uses a plugging block, which can, on the one hand, block the opening at the top of the storage block to prevent the hot air from entering the storage groove, making the storage groove a relatively closed space, thereby better drying and heating the injection molding raw materials; on the other hand, the cylindrical rod can be clamped on the outside of the positioning strip, so that the storage block can be better positioned and the plugging block can be limited to a certain extent, greatly improving the position limitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of the positioning rod of the present invention;

[0020] Figure 3The schematic diagram of the overall internal structure of the protection plate of the present invention is

[0021] Figure 4 This is a schematic diagram of the overall internal structure of the heating box of the present invention;

[0022] Figure 5 It is a schematic diagram of the overall structure of the X-shaped connecting rod of the present invention;

[0023] Figure 6 It is a schematic diagram of the overall internal structure of the storage box of the present invention;

[0024] Figure 7 It is a schematic diagram of the overall structure of the plug block of the present invention;

[0025] Figure 8 This is a schematic diagram of the overall structure of the closed concave plate and the closed convex plate of the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Heating box; 11. Storage block; 101. Through port; 102. Fixing block; 103. Closed concave plate; 31. Square fixing strip 2; 32. Square fixing strip 1; 33. Extrusion plate; 104. Closed convex plate; 12. Block; 121. Square plate; 122. X-shaped plate; 124. Cylindrical rod; 125. Handle; 13. Positioning strip; 14. Connecting block 3; 15. X-shaped connecting rod; 16. Rotating rod 2; 2. Protection plate; 21. Motor; 22. Large gear; 23. Small gear; 24. Rotating rod 1; 3. Connecting block 1; 4. Cover plate; 5. Connecting block 2; 6. Positioning rod; 7. Middle axis rod; 8. Heater. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses. Example

[0029] See also Figure 1-Figure 5 The present invention is a pretreatment device for household appliance molding materials, comprising:

[0030] A heating box 1, a protective plate 2 is fixedly connected to the bottom of the heating box 1, a connecting block 3 is fixedly connected to the upper end of the front of the heating box 1, a connecting block 2 5 is arranged just above the connecting block 1 3, a cover plate 4 is arranged just above the heating box 1, and the front of the cover plate 4 is fixedly connected to the connecting block 2 5;

[0031] A fixing rod is vertically rotatably connected inside the connecting block 1 3, and the connecting block 2 5 is rotatably connected to the connecting block 1 3 via the fixing rod;

[0032] A positioning rod 6, a circular opening is formed on the top of the positioning rod 6, a central axis rod 7 is fixedly connected inside the circular opening, the central axis rod 7 is fixedly connected to the heating box 1 through the positioning rod 6, a heater 8 is arranged at the central axis inside the heating box 1, and the top of the heater 8 is fixedly connected to the bottom of the central axis rod 7;

[0033] The motor 21 is arranged on the inner side of the protection plate 2, a large gear 22 is fixedly connected to the top of the motor 21, a small gear 23 is meshed on the outer side of the large gear 22, a rotating rod 24 is fixedly connected to the top of the small gear 23, and the small gear 23 is rotationally connected to the motor 21 through the large gear 22.

[0034] The interior of the heating box 1 includes a storage block 11, a plug block 12, a positioning bar 13, a connecting block three 14, an X-shaped connecting rod 15 and a rotating rod two 16. The plug block 12 is arranged on the top of the storage block 11, the positioning bar 13 is arranged on the front and rear sides of the storage block 11, and arc-shaped recesses are opened on both sides of the positioning bar 13. The connecting block three 14 is fixedly connected to the bottom of the positioning bar 13, the X-shaped connecting rod 15 is arranged directly below the storage block 11, and the rotating rod two 16 is fixedly connected to the X-shaped connecting rod 15. Through the storage block 11, the rotating storage block 11 can make the closed convex plate 104 and the closed concave plate 103 be evenly heated, further reducing the occurrence of uneven drying and heating. At the same time, the injection molding raw materials located inside it can also be evenly heated, thereby improving the drying pretreatment efficiency and drying effect of the injection molding raw materials.

[0035] The bottom of the second rotating rod 16 is connected to the small gear 23 through the first rotating rod 24 , and the second rotating rod 16 is rotationally connected to the large gear 22 through the small gear 23 . Example

[0036] See also Figure 1-Figure 8 The present invention is a pretreatment device for household appliance molding materials, comprising a heating box 1, a protective plate 2 is fixedly connected to the bottom of the heating box 1, a connecting block 3 is fixedly connected to the upper end of the front of the heating box 1, a connecting block 2 5 is arranged just above the connecting block 1 3, a cover plate 4 is arranged just above the heating box 1, and the front of the cover plate 4 is fixedly connected to the connecting block 2 5;

[0037] A fixing rod is vertically rotatably connected inside the connecting block 1 3, and the connecting block 2 5 is rotatably connected to the connecting block 1 3 via the fixing rod;

[0038] A positioning rod 6, a circular opening is formed on the top of the positioning rod 6, a central axis rod 7 is fixedly connected inside the circular opening, the central axis rod 7 is fixedly connected to the heating box 1 through the positioning rod 6, a heater 8 is arranged at the central axis inside the heating box 1, and the top of the heater 8 is fixedly connected to the bottom of the central axis rod 7;

[0039] The motor 21 is arranged on the inner side of the protection plate 2, a large gear 22 is fixedly connected to the top of the motor 21, a small gear 23 is meshed on the outer side of the large gear 22, a rotating rod 1 24 is fixedly connected to the top of the small gear 23, the small gear 23 is rotationally connected to the motor 21 through the large gear 22, the motor 21 located on the inner side of the protection plate 2 is started through the protection plate 2, the large gear 22 drives the small gear 23 to rotate, the rotating rod 1 24 drives the rotating rod 2 16 to rotate, and four small gears 23 can be driven to rotate by one power source, thereby achieving the effect of driving four storage blocks 11 to rotate at the same time, and the protection plate 2 can support the heating box 1 while protecting the large gear 22 and small gear 23 of the motor 21 located inside it.

[0040] The interior of the heating box 1 includes a storage block 11, a plug block 12, a positioning bar 13, a connecting block three 14, an X-shaped connecting rod 15 and a rotating rod two 16. The plug block 12 is arranged on the top of the storage block 11, the positioning bar 13 is arranged on the front and rear sides of the storage block 11, and arc-shaped recesses are provided on both sides of the positioning bar 13. The connecting block three 14 is fixedly connected to the bottom of the positioning bar 13. The positioning bar 13 can be used to limit the position of the storage block 11, and the storage block 11 is fixed when it rotates to prevent the storage block 11 from being thrown away due to centrifugal force. The X-shaped connecting rod 15 is arranged directly below the storage block 11, and the rotating rod two 16 is fixedly connected to the X-shaped connecting rod 15.

[0041] The bottom of the rotating rod 16 is connected to the small gear 23 through the rotating rod 1 24, and the rotating rod 16 is rotatably connected to the large gear 22 through the small gear 23. Through the rotating rod 1 24, the rotation force of the small gear 23 can be transmitted to the rotating rod 16, so that the X-shaped connecting rod 15 drives the storage block 11 to rotate by relying on the positioning bar 13.

[0042] A storage groove is provided on the top of the storage block 11, and openings 101 are provided on the left and right sides of the storage block 11. Fixed blocks 102 are provided on the front and rear sides of the storage groove. A closed concave plate 103 is provided inside the storage groove. A closed convex plate 104 is adapted to the left side of the closed concave plate 103. Through the opening 101, the hot air inside the heating box 1 can enter the storage block 11, and then the closed concave plate 103 and the closed convex plate 104 can be affected by the hot air, so as to dry and heat the injection molding raw materials located therein;

[0043] The fixing block 102 is slidably connected inside the storage slot, and an opening is provided on one side of the fixing block 102 close to the closed concave plate 103. The fixing block 102 can assist in plugging the closed concave plate 103 and the closed convex plate 104 together, so that the closed concave plate 103 and the closed convex plate 104 can be more tightly connected.

[0044] The sides of the closing concave plate 103 and the closing convex plate 104 that are away from each other are in contact with the inner wall of the opening, and the closing concave plate 103 and the closing convex plate 104 are slidably connected inside the opening of the fixing block 102 .

[0045] A square plate 121, an X-shaped plate 122, a cylindrical rod 124 and a handle 125 are fixedly connected to the top of the plug block 12. The square plate 121 is fixedly connected to the top of the plug block 12, the X-shaped plate 122 is fixedly connected to the top of the square plate 121, the cylindrical rod 124 is fixedly connected to the bottom of the X-shaped plate 122, and the handle 125 is fixedly connected to the top of the square plate 121. Through the plug block 12, on the one hand, the opening at the top of the storage block 11 can be blocked to prevent the hot air from entering the storage tank from flowing away, so that the storage tank becomes a relatively closed space, thereby better drying and heating the injection molding raw materials. On the other hand, the cylindrical rod 124 can be stuck on the outside of the positioning strip 13, so that the storage block 11 can be better positioned and the plug block 12 can be limited to a certain extent, which greatly improves the effect of limiting the position.

[0046] The plugging block 12 is inserted into the storage groove. The shape and size of the plugging block 12 are the same as those of the storage groove. The bottom of the square plate 121 is in contact with the top of the storage block 11.

[0047] The cylindrical rod 124 is clamped in the arc-shaped recess, and the shape and size of the square plate 121 are the same as the shape and size of the top end of the storage block 11.

[0048] A material placement groove is provided at the central axis of the front side of the closed convex plate 104, a square groove 1 is provided on the outer side of the material placement groove, a square groove 2 is provided on the outer side of the square groove 1, an extrusion plate 33 is fixedly connected at the central axis of the front side of the closed concave plate 103, a square fixing strip 1 32 is provided on the outer side of the extrusion plate 33, a square fixing strip 2 31 is provided on the outer side of the square fixing strip 1 32, and the injection molding raw material can be spread flat in the material placement groove by the closed concave plate 103 and the closed convex plate 104, so as to avoid that the injection molding raw material is too deep, resulting in poor drying and heating effect of part of the injection molding raw material, which leads to different drying degrees of the injection molding raw materials inside and outside, which will not only damage the injection molding raw material located on the outside, but also affect the efficiency of removing bubbles, and by relying on the square fixing strip 1 32 and the square fixing strip 2 31 to be clamped in the square groove 1 and the square groove 2, the injection molding raw material can be extremely confined in the material placement groove, avoiding the problem of leakage.

[0049] The square groove 1 and the square groove 2 are respectively matched with the square fixing strip 1 32 and the square fixing strip 2 31, the shape and size of the extrusion plate 33 are matched with the shape and size of the material placement groove, and the top of the extrusion plate 33 does not contact the inner wall of the material placement groove.

[0050] A specific application of this embodiment is: the cover plate 4 is rotated outwardly by relying on the fixing rod, and then the staff uses the handle 125 to pull out the plug 12 and the cylindrical rod 124 from the top of the storage block 11, and then the closed convex plate 104 and the closed concave plate 103 and the fixed block 102 are pulled out from the storage groove inside the storage block 11, and then after the closed convex plate 104 and the closed concave plate 103 are opened, the injection molding raw materials that need to be dried and pre-treated are injected into the material placement groove, and the injection is stopped after two-thirds of the filling is filled, and then the closed concave plate 103 is covered on the closed convex plate 104, and the square fixing strip 1 32 and the square fixing strip 2 31 are clamped in the square groove 1 and the square groove 2. At this time, the extrusion plate 33 is also inserted into the material placement groove, and the injection molding raw materials located inside it will be squeezed to a certain extent by the extrusion plate 33. When the closed convex plate 104 and the closed concave plate 103 are completely closed, the fixed block 102 is inserted into the closed convex plate 1 through the opening. 04 and the outer surface of the closed concave plate 103, and then put it back into the storage tank, the staff uses the handle 125 to reinsert the plug 12 into the storage block 11, at this time, the closed convex plate 104 and the top of the closed concave plate 103 are in contact with the bottom of the plug 12, the cylindrical rod 124 is stuck in the arc-shaped recess of the positioning bar 13, and then the motor 21 located on the inner side of the protective plate 2 is started, the large gear 22 drives the small gear 23 to rotate, the rotating rod 1 24 drives the rotating rod 2 16 to rotate, and the X-shaped connecting rod 15 relies on the positioning bar 13 to drive the storage block 11 to rotate together, and at the same time, the heater 8 is started, and the cover plate 4 is closed again, and then the heat emitted by the heater 8 will fill the entire heating box 1, and the hot air will enter the storage tank through the through port 101, thereby improving the drying effect of the injection molding raw materials, and relying on the rotation energy, the closed convex plate 104 and the closed concave plate 103 can be evenly heated, and the injection molding raw materials located inside can also be evenly heated.

[0051] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A pretreatment device for household appliance molding materials, characterized in that: include: A heating box (1), wherein a protective plate (2) is fixedly connected to the bottom of the heating box (1), a connecting block 1 (3) is fixedly connected to the upper end of the front of the heating box (1), a connecting block 2 (5) is arranged directly above the connecting block 1 (3), and a cover plate (4) is arranged directly above the heating box (1), and the front of the cover plate (4) is fixedly connected to the connecting block 2 (5); The connection block 1 (3) is internally connected with a fixing rod for vertical rotation, and the connection block 2 (5) is rotationally connected to the connection block 1 (3) via the fixing rod; A positioning rod (6), wherein a circular opening is formed at the top of the positioning rod (6), a central axis rod (7) is fixedly connected to the inside of the circular opening, the central axis rod (7) is fixedly connected to the heating box (1) via the positioning rod (6), a heater (8) is provided at the central axis inside the heating box (1), and the top of the heater (8) is fixedly connected to the bottom of the central axis rod (7); A motor (21), the motor (21) being arranged on the inner side of the protection plate (2), the top of the motor (21) being fixedly connected to a large gear (22), the outer side of the large gear (22) being meshed with a small gear (23), the top of the small gear (23) being fixedly connected to a rotating rod (24), the small gear (23) being rotationally connected to the motor (21) via the large gear (22); The heating box (1) comprises a storage block (11), a plug block (12), a positioning bar (13), a third connecting block (14), an X-shaped connecting rod (15) and a second rotating rod (16), wherein the plug block (12) is arranged on the top of the storage block (11), the positioning bar (13) is arranged on the front and rear sides of the storage block (11), arc-shaped notches are provided on both sides of the positioning bar (13), the third connecting block (14) is fixedly connected to the bottom of the positioning bar (13), the X-shaped connecting rod (15) is arranged directly below the storage block (11), and the second rotating rod (16) is fixedly connected to the X-shaped connecting rod (15); The storage block (11) has a storage slot at the top, openings (101) are provided on the left and right sides of the storage block (11), fixing blocks (102) are provided on the front and rear sides of the storage slot, a closed concave plate (103) is provided inside the storage slot, and a closed convex plate (104) is adapted to be provided on the left side of the closed concave plate (103); The fixing block (102) is slidably connected inside the storage slot, and an opening is formed on a side of the fixing block (102) close to the closed concave plate (103); The sides of the closed concave plate (103) and the closed convex plate (104) that are away from each other are in contact with the inner wall of the opening, and the closed concave plate (103) and the closed convex plate (104) are slidably connected inside the opening of the fixed block (102); The top of the plug block (12) is fixedly connected to a square plate (121), an X-shaped plate (122), a cylindrical rod (124) and a handle (125); the square plate (121) is fixedly connected to the top of the plug block (12); the X-shaped plate (122) is fixedly connected to the top of the square plate (121); the cylindrical rod (124) is fixedly connected to the bottom of the X-shaped plate (122); and the handle (125) is fixedly connected to the top of the square plate (121); The plug block (12) is inserted into the storage groove, the shape and size of the plug block (12) are the same as those of the storage groove, and the bottom of the square plate (121) and the top of the storage block (11) are in contact with each other.

2. A pretreatment device for household appliance molding materials according to claim 1, characterized in that: The bottom of the second rotating rod (16) is connected to the small gear (23) via the first rotating rod (24), and the second rotating rod (16) is rotationally connected to the large gear (22) via the small gear (23).

3. A pretreatment device for household appliance molding materials according to claim 1, characterized in that: The cylindrical rod (124) is clamped inside the arc-shaped recess, and the shape and size of the square plate (121) are the same as the shape and size of the top end of the storage block (11).

4. A pretreatment device for household appliance molding materials according to claim 3, characterized in that: A material placement groove is provided at the central axis of the front face of the closed convex plate (104), a square groove 1 is provided on the outer side of the material placement groove, and a square groove 2 is provided on the outer side of the square groove 1; an extrusion plate (33) is fixedly connected to the central axis of the front face of the closed concave plate (103), a square fixing strip 1 (32) is provided on the outer side of the extrusion plate (33), and a square fixing strip 2 (31) is provided on the outer side of the square fixing strip 1 (32).

5. A pretreatment device for household appliance molding materials according to claim 4, characterized in that: The square groove one and the square groove two are respectively matched with the square fixing strip one (32) and the square fixing strip two (31), the shape and size of the extrusion plate (33) are matched with the shape and size of the material placement groove, and the top of the extrusion plate (33) does not contact the inner wall of the material placement groove.

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