Paste extruder

Abstract

The utility model discloses a paste extruder in the field of paste extrusion tools, which comprises a paste tube for accommodating paste, a discharge nozzle arranged at the upper end of the paste tube, a paste outlet arranged on the discharge nozzle, a movable cover plate arranged on the paste tube outside the discharge nozzle and capable of moving, a first limit part arranged on the movable cover plate, and a second limit part arranged on the first limit part. The discharging nozzle is provided with a second limiting piece, and the movable cover plate is connected to the discharging nozzle through cooperation between the first limiting piece and the second limiting piece and seals the discharging nozzle. The problems that in the prior art, in the toothpaste filling process, aluminum plastic foil needs to be arranged on a discharging nozzle for leakage prevention, and tearing operation is troublesome in the using process can be solved.

Description

Technical Field

[0001] The utility model relates to the field of paste extrusion tools, in particular to a paste extruder. Background Art

[0002] Toothpaste is a necessary cleaning product for people's daily life, which is used to clean the oral cavity and teeth. After the toothpaste is produced, it is packaged in a packaging body. The common packaging body in the prior art is a tubular toothpaste soft bag, with a discharge nozzle in the middle of the top, and the outer side of the discharge nozzle is threadedly connected to the end cap. Different sealing methods are adopted at the bottom according to the different materials of the soft bag. The bottom of the plastic material is hot-pressed and sealed, and the bottom of the metal material is rolled and sealed. When using, it is necessary to first remove the end cap on the outside of the discharge nozzle, and then manually squeeze the soft bag to squeeze the toothpaste contained in the inside out of the discharge nozzle, and use a toothbrush to carry it into the oral cavity for use. There are many inconveniences in the production and use of toothpaste in this traditional packaging, mainly including: 1. It is necessary to manually squeeze the soft bag to squeeze out the toothpaste, which is troublesome to operate; 2. The extrusion amount is difficult to control; 3. In the later stage of use, the toothpaste attached to the inner wall of the soft bag is difficult to squeeze out completely; 4. In the filling link of the production process, in order to prevent the poured toothpaste from leaking from the discharge nozzle, aluminum-plastic foil is usually pasted on the discharge nozzle and pressed with an end cap, which increases the cost, but when used for the first time, the aluminum-plastic foil needs to be manually torn off. The tearing process easily spreads the adhered toothpaste on the hands, which is troublesome to operate; 5. During use, toothpaste is easy to remain on the discharge nozzle, which is difficult to clean and causes waste. It will harden and yellow over time; 6. The extruded toothpaste is cylindrical, with a small contact surface with the toothbrush, and is easy to fall off the toothbrush. Utility Model Content

[0003] The utility model aims to provide a paste extruder to solve the problem in the prior art that an aluminum-plastic foil needs to be arranged at a material outlet during toothpaste filling to prevent leakage, and the operation of tearing it off during use is troublesome.

[0004] In order to achieve the above-mentioned purpose, the basic technical scheme of the utility model is as follows: a paste extruder, comprising a paste tube for accommodating the paste, a discharge nozzle is provided at the upper end of the paste tube, a paste outlet is opened on the discharge nozzle, a movable cover plate is provided on the paste tube outside the discharge nozzle, a first limit piece is provided on the movable cover plate, a second limit piece is provided on the discharge nozzle, and the movable cover plate is connected to the discharge nozzle through the cooperation between the first limit piece and the second limit piece to close the discharge nozzle.

[0005] The principle and advantage of this scheme are: in actual application, the paste tube is used to hold toothpaste, the paste outlet on the discharging nozzle is the extrusion port of the toothpaste when in use, the bottom opening of the paste tube is set during the filling process, and the toothpaste is pressurized and poured into the paste tube from the bottom. After the filling is completed, the bottom opening of the paste tube is closed by connecting the base. The movable cover plate is used to reliably close the paste outlet through the cooperation of the first limiter and the second limiter. In this way, on the one hand, in the filling link of the production process, the toothpaste can be prevented from leaking from the paste outlet during the process of pressurizing the toothpaste into the paste tube, and the filling can be stably completed without pasting aluminum-plastic foil on the paste outlet. On the other hand, the operation of tearing off the aluminum-plastic foil is omitted during use, and the use is simpler and more convenient. After use, the movable cover plate can scrape and close the paste outlet to prevent toothpaste from remaining on the outer wall of the discharging nozzle and leaking from the paste outlet, which can effectively prevent the toothpaste from contacting with the air to form a hard knot.

[0006] Furthermore, the first limiting member is a slide groove provided on the side wall of the material outlet on the left and right sides of the paste outlet, and the slide groove is located below the paste outlet, and the second limiting member is an L-shaped latch card formed by folding the left and right sides of the movable cover plate downward and inward. As a preferred method, when the movable cover plate is used in this way, the latch card is inserted into the slide groove during the rotation process, and the slide groove limits the latch card, ensuring that the movable cover plate is stably connected to the material outlet, and the paste outlet is stably and reliably closed.

[0007] Furthermore, the first limiting member is a C-shaped slide groove formed by the side walls of the material outlet on the left and right sides extending outward and then folding upward, and the C-shaped slide groove is located below the material outlet; the second limiting member is an L-shaped sliding card formed by folding downward on the left and right sides of the movable cover. As a preferred method, when the movable cover is used in this way, the sliding card is inserted into the C-shaped slide groove during the rotation of the movable cover, and the top edge of the C-shaped slide groove prevents the sliding card from falling off, ensuring that the movable cover is stably connected to the material outlet and stably and reliably closes the material outlet.

[0008] Furthermore, the first limiting member is a slide slot card formed by the side walls of the material outlet on the left and right sides extending outward, and the slide slot card is located below the material outlet; the second limiting member is a movable slide slot protruding outward formed by the left and right sides of the movable cover extending downward and then folding, and the movable slide slot has a C-shaped cross-section, and the opening of the movable slide slot faces the bottom of the movable cover. As a preferred method, when the movable cover is used in this way, the movable slide slot is slidably sleeved on the outside of the slide slot card during the rotation of the movable cover, and the slide slot card prevents the bottom edge of the movable slide slot from falling off, ensuring that the movable cover is stably connected to the material outlet and stably and reliably closes the material outlet.

[0009] Furthermore, the first limiting member is a slide slot card platform formed by the side walls of the material outlet on the left and right sides of the paste outlet extending outward, and the slide slot card platform is flush with the paste outlet; the second limiting member is an L-shaped support piece formed by folding the left and right sides of the movable cover plate downward and inward. As a preferred method, when the movable cover plate is used in this way, the support piece is sleeved on the outside of the slide slot card platform during the rotation of the movable cover plate, and the slide slot card platform prevents the bottom edge of the support piece from falling off. In this way, because the slide slot card platform is flush with the paste outlet, the movable cover plate can better fit the end face of the material outlet, and it is easier to move the support piece sleeved on the outside of the slide slot card platform, ensuring that the movable cover plate is stably connected to the material outlet and stably and reliably closes the paste outlet.

[0010] Furthermore, the first limiting member is a T-shaped slot on the left and right sides of the paste outlet, and the second limiting member is a T-shaped slide formed by extending downward from the left and right edges of the bottom of the movable cover. When used in this way, the slot provides a limit for the card slot, ensuring that the movable cover is stably connected to the discharge nozzle and stably and reliably closes the paste outlet.

[0011] Furthermore, the first limiting member is a T-shaped slot on the left and right sides of the discharge nozzle, and the second limiting member is a T-shaped slide bar extending downward from the left and right edges of the bottom of the movable cover. When used in this way, the T-shaped slot provides a limit for the T-shaped slide bar, ensuring that the movable cover is stably connected to the discharge nozzle and stably and reliably closes the discharge nozzle.

[0012] Further, the cross-sectional profile of the discharge nozzle is one of a circle, an ellipse, a triangle, a rectangle or a regular polygon. As a preferred embodiment, the discharge nozzle can adopt a variety of shapes, and different shapes can achieve the function of the discharge channel.

[0013] Furthermore, the paste outlet is one of circular, oval, triangular, square or polygonal. As a preferred embodiment, the paste outlet can adopt a variety of shapes, especially a triangle, square or other shape with straight edges, so that the extruded toothpaste can have a flat surface, and the oval extruded toothpaste has a relatively wide contact surface, and can have a larger contact area with the toothbrush, so that the toothpaste is stably placed on the toothbrush and is not easy to fall off.

[0014] Furthermore, the discharge nozzle is located at the top edge of the paste tube, and is formed by the side wall and the top wall of the paste tube extending upward. Preferably, the discharge nozzle and the paste tube share a side wall, and the discharge nozzle and the paste tube can be integrally injection molded, which is convenient for processing and manufacturing, has a lower production cost, and is easy to receive toothpaste during use, and it is not easy to leave toothpaste residue at the discharge nozzle.

[0015] Furthermore, the discharging nozzle is provided with an inclined discharging wall, the discharging port is opened on the discharging wall, the discharging wall is located between the top wall and the side wall of the discharging nozzle, or the discharging wall is the top wall of the discharging nozzle. Preferably, the discharging port is inclined relative to the side wall of the paste tube, so that it is more convenient to use a toothbrush to receive the squeezed toothpaste during use, and it is more convenient to receive all the squeezed toothpaste to avoid toothpaste residue. When the discharging wall is the top wall, the processing of the discharging nozzle is more convenient.

[0016] Furthermore, the toothpaste outlet is provided on the top wall or side wall of the discharging nozzle. Preferably, the toothpaste can be squeezed out from the side or from the top, and the side squeeze is convenient for holding the paste tube horizontally for use, and the top squeeze is convenient for inverting the paste tube for use, and the use method is more diverse to meet the use needs of different consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of two extreme positions of the pressing plate in Example 1 of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection between the pressing plate and the push rod in Example 1 of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the discharge nozzle and the movable cover plate in Example 1 of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the discharge nozzle and the movable cover plate in Example 2 of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the discharge nozzle and the movable cover plate in Example 3 of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the discharge nozzle and the movable cover plate in Example 4 of the utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the discharge nozzle and the movable cover plate in Example 14 of the utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the discharge nozzle and the movable cover plate in Example 15 of the utility model. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The figure marks in the drawings of the specification include: paste tube 1, upper tube body 101, lower tube body 102, joint card 103, joint groove 104, discharge chamber 2, piston chamber 3, pressing plate 4, movable cover plate 41, sliding groove 401, latch card 411, sliding card 412, movable slide 413, support plate 414, card slot 415, T-shaped slide 416, upper piston 5, discharge nozzle 6, paste outlet 601, slide 602, C-shaped slide 603, slide card 604, slide card platform 605, groove plate 606, T-shaped groove 607, first one-way valve 7, second one-way valve 8, partition 9, base 10, lower piston 11, spring 12, push rod 13.

[0027] Embodiment 1, basically as attached Figure 1 As shown: A paste extruder includes a paste tube for accommodating paste, the bottom of the paste tube is connected to a base, a balancing hole is provided on the base, and the base is interference fit with the inner wall of the bottom end of the paste tube. A discharge nozzle is provided at the top of the paste tube, and the discharge nozzle is a tube body with a rectangular cross-sectional profile. The discharge nozzle is located at the top edge of the paste tube and is formed by the side wall and the top wall of the paste tube extending upward, that is, the discharge nozzle and the paste tube share a side wall. An inclined discharge wall is provided between the top wall and the side wall of the discharge nozzle, and a rectangular paste outlet is provided in the middle of the discharge wall, and the longitudinal cross-sectional profile of the paste outlet is arc-shaped. A pressing plate is hinged at the top of the paste tube outside the discharge nozzle, and a movable cover plate is integrally formed at the end of the pressing plate near the discharge nozzle, and the longitudinal cross-sectional profile of the movable cover plate is also arc-shaped. The rotation of the pressing plate causes the movable cover plate to rotate with it, and the rotation trajectory of the movable cover plate coincides with the arc of the paste outlet, so that the movable cover plate can slide against the outer wall of the discharge nozzle where the paste outlet is provided, and close the paste outlet. The discharge nozzle is provided with a first limiter, and the movable cover is provided with a second limiter. The first limiter can be connected with the second limiter in cooperation with each other, so that the movable cover is connected with the discharge nozzle. Figure 3 As shown, the first limiting member is a slide groove opened on the side wall of the discharge nozzle on the left and right sides of the paste outlet, and the slide groove is located below the paste outlet. The second limiting member is an L-shaped pin card formed by folding the left and right sides of the movable cover plate downward and inward. During the rotation of the movable cover plate following the pressing plate, the second limiting member and the first limiting member are matched and connected, that is, the pin card slides and inserts into the slide groove to complete the closure of the paste outlet by the movable cover plate.

[0028] The upper part of the paste tube is provided with a discharge chamber and a piston chamber arranged side by side, a common side wall is provided between the discharge chamber and the piston chamber, and the discharge nozzle is connected to the upper end of the discharge chamber. A first one-way valve is provided at the lower end of the discharge chamber, and a partition is provided in the paste tube below the first one-way valve, the partition is located below the piston chamber, and the partition is integrally formed with the inner wall of the paste tube. A second one-way valve is provided on the partition, and the second one-way valve is vertically aligned with the first one-way valve. The first one-way valve and the second one-way valve are both one-way conductive to the discharge chamber, and the first one-way valve and the second one-way valve are both valve plates with one end bonded and fixed and the other end capable of flipping around a fixed point. The paste tube includes an upper tube body and a lower tube body, and the joint between the upper tube body and the lower tube body is located between the first one-way valve and the second one-way valve. The joint includes a joint card integrally formed on the inner wall of the lower end of the upper tube body and a joint groove opened on the outer wall of the upper end of the lower tube body, and the joint card can be inserted into the joint groove to connect the upper tube body with the lower tube body, and the outer wall of the paste tube is flat and has no protrusions after connection.

[0029] The piston cavity is provided with an upper piston, and the bottom end of the pressing plate is connected with a push rod. Figure 2 As shown, a T-shaped sliding groove is provided at the bottom of the pressing plate, and the top of the push rod is inserted into the sliding groove in a T-shaped sliding manner. The push rod passes through the outer wall of the paste tube and is bonded to the upper piston. A spring is connected between the pressing plate and the outer wall of the paste tube as a reset member, and the spring is sleeved on the push rod. A lower piston is placed on the inner side of the lower part of the paste tube.

[0030] The specific implementation process is as follows: before filling the toothpaste, install the paste tube, the pressing plate, the upper piston, the first one-way valve, and the second one-way valve in place. After the pressing plate and the paste tube are assembled, the latch card is inserted into the slide slot, so that the movable cover plate fits on the paste outlet to close the paste outlet. During the filling process, the toothpaste fills the paste tube under pressure perfusion. During the perfusion and filling process, the movable cover plate stably blocks the paste outlet under the limit of the slide slot on the latch card, and the toothpaste will not be squeezed out from the paste outlet. After filling according to the amount, install the lower piston from the bottom of the paste tube, and then press the base into the bottom of the paste tube.

[0031] During use, the pressing plate is pressed downward by external forces such as pneumatic, electric, hydraulic or manual, and the pressing plate as a whole rotates around the hinge point to overcome the support of the spring. During the rotation, the latch on the movable cover slides out of the slide slot, and finally the movable cover is detached from the paste outlet, so that the paste outlet is exposed. The pressing plate pushes the push rod downward, and the top of the push rod slides in the slide slot, and the push rod pushes the upper piston downward to move downward, and the upper piston moves downward to compress the temporary storage chamber surrounded by the partition, the discharge chamber, and the piston chamber, and the second one-way valve is located on the partition as the bottom wall of the temporary storage chamber. When the temporary storage chamber is compressed, the second one-way valve cannot be conducted, and the toothpaste in the temporary storage chamber is squeezed into the discharge chamber through the first one-way valve, and then the toothpaste in the discharge chamber is squeezed out from the paste outlet of the discharge nozzle. The toothpaste squeezed out from the rectangular paste outlet is in the shape of a rectangular strip. When the toothpaste is received by a toothbrush, there is a flat surface between the toothpaste and the toothbrush, so that the toothpaste and the toothbrush are in contact with a large area and are not easy to fall from the toothbrush. After extrusion, the external force acting on the pressing plate is removed, and the pressing plate is reset upward under the action of the spring, and the movable cover plate is reset as well. The latch card is inserted into the slide again to close the paste outlet. The movable cover plate scrapes across the paste outlet to remove the residual toothpaste, and the slide limits the latch card so that the toothpaste will not overflow from the paste outlet. During the resetting process of the pressing plate, the push rod is also reset upward, so that the upper piston is pulled up, the volume of the temporary storage chamber becomes larger, the internal pressure decreases, and the balance hole at the base of the paste tube connects the inside and the outside so that the lower piston is subjected to atmospheric pressure, that is, the toothpaste in the paste tube under the partition is subjected to atmospheric pressure. When the pressure in the temporary storage chamber decreases, the first one-way valve cannot be conducted to the temporary storage chamber, and there is a pressure difference on both sides of the second one-way valve, which draws the toothpaste under the partition into the temporary storage chamber through the second one-way valve. The atmospheric pressure causes the lower piston to move upward until the pressure on both sides of the second one-way valve reaches equilibrium, completing a toothpaste extrusion.

[0032] In addition to toothpaste, the technical solution can also be applied to other substances with the same or similar fluidity as toothpaste.

[0033] Embodiment 2, this embodiment differs from embodiment 1 only in that, Figure 4 As shown, the first limiting member is a C-shaped slide groove formed by the side walls of the discharge nozzle on the left and right sides of the paste outlet extending outward and then folding upward, and the C-shaped slide groove is located below the paste outlet. The second limiting member is an L-shaped sliding card formed by folding the left and right sides of the movable cover plate downward. After assembly, when the pressing plate is not operated, the horizontal edge of the sliding card is inserted into the C-shaped slide groove, and the upper retaining edge of the C-shaped slide groove limits the sliding card, so that the movable cover plate is buckled and fits on the paste outlet, and the paste outlet can be stably and effectively closed. In order to facilitate the display of the structure, the curvature of the paste outlet and the movable cover plate is not reflected in the figure, but in fact, the longitudinal cross-sectional profile of the paste outlet is an arc, and the longitudinal cross-sectional profile of the movable cover plate is also an arc. The rotation of the pressing plate causes the movable cover plate to rotate with it, and the rotation trajectory of the movable cover plate coincides with the arc of the paste outlet, so that the movable cover plate can slide against the outer wall of the discharge nozzle where the paste outlet is opened, and close the paste outlet.

[0034] Embodiment 3, this embodiment differs from embodiment 1 only in that, Figure 5 As shown, the first limiting member is a slide card formed by the side walls of the discharge nozzle on the left and right sides of the paste outlet extending outward, and the slide card is located below the paste outlet. The second limiting member is a movable slide that protrudes outward and is formed by the left and right sides of the movable cover extending downward and then folding. The cross-section of the movable slide is C-shaped, and the opening of the movable slide faces below the movable cover. After assembly, when the pressing plate is not operated, the movable cover and the movable slide are covered on the outside of the paste outlet and the slide card, and the slide card is inserted into the movable slide. The movable slide limits the slide card so that the movable cover is buckled and fits on the paste outlet, and the paste outlet can be stably and effectively closed. In order to facilitate the display of the structure, the curvature of the paste outlet and the movable cover plate is not reflected in the figure, but in fact, the longitudinal cross-sectional contour of the paste outlet is an arc-shaped, and the longitudinal cross-sectional contour of the movable cover plate is also an arc-shaped. The pressing plate rotates to cause the movable cover plate to rotate accordingly, and the rotation trajectory of the movable cover plate coincides with the arc of the paste outlet, so that the movable cover plate can slide against the outer wall of the paste outlet of the discharge nozzle and close the paste outlet.

[0035] Embodiment 4, this embodiment differs from embodiment 1 only in that, Figure 6 As shown, the first limiting member is a slide card table formed by the side walls of the material outlet on the left and right sides of the material outlet extending outward, and the slide card table is flush with the material outlet. The second limiting member is an L-shaped support plate formed by folding the left and right sides of the movable cover plate downward and inward. After assembly, when the pressing plate is not operated, the movable cover plate and the support plate are covered on the outside of the material outlet and the slide card table, and the slide card table is inserted between the support plate and the movable cover plate. The slide card table limits the support plate so that the movable cover plate is buckled and fits on the material outlet, and the material outlet can be stably and effectively closed. In order to facilitate the display of the structure, the curvature of the material outlet and the movable cover plate is not reflected in the figure, but in fact, the longitudinal cross-sectional profile of the material outlet is an arc, and the longitudinal cross-sectional profile of the movable cover plate is also an arc. The rotation of the pressing plate causes the movable cover plate to rotate with it, and the rotation trajectory of the movable cover plate coincides with the arc of the material outlet, so that the movable cover plate can slide against the outer wall of the material outlet opening of the material outlet and close the material outlet.

[0036] Embodiment 5: The difference between this embodiment and embodiment 1 is that the discharge nozzle is a tube with a square cross-sectional profile. The toothpaste extruded in this embodiment is in the shape of a rectangular strip, and when receiving, the toothpaste has a larger contact surface with the toothbrush, and the toothpaste is more stably received and not easy to fall off.

[0037] Embodiment 6: The difference between this embodiment and embodiment 1 is that the discharge nozzle is a tube body with a circular cross-sectional profile. In this embodiment, the surface of the discharge nozzle is smoother without dead corners, and it is not easy to leave toothpaste or stains.

[0038] Embodiment 7, the difference between this embodiment and embodiment 1 is that the discharge nozzle is a tube body with an elliptical cross-sectional profile. In this embodiment, the surface of the discharge nozzle is smoother and less likely to retain stains, and the extruded toothpaste and the toothbrush also have a larger contact surface, so the toothpaste is less likely to fall off the toothbrush.

[0039] Embodiment 8: The difference between this embodiment and embodiment 1 is that the paste outlet is triangular.

[0040] Embodiment 9: The difference between this embodiment and embodiment 1 is that the paste outlet is elliptical.

[0041] Embodiment 10: The difference between this embodiment and embodiment 1 is that the paste outlet is circular.

[0042] Embodiment 11: The difference between this embodiment and embodiment 1 is that the paste outlet is located on the side wall of the discharge nozzle and is vertical.

[0043] Embodiment 12: The difference between this embodiment and embodiment 1 is that the paste outlet is located at the top of the discharge nozzle and the paste outlet is horizontal.

[0044] Embodiment 13, the difference between this embodiment and embodiment 1 is that the discharge nozzle is formed by extending the top wall of the paste tube upward, and the discharge nozzle is arranged vertically or obliquely. In this embodiment, the discharge nozzle is more convenient to shape, and the production mold is easier to process.

[0045] Embodiment 14, this embodiment differs from Embodiment 1 only in that, Figure 7 As shown, the first limiting member is a slot formed by the discharge nozzles on the left and right sides of the paste outlet extending upward and folding inward, and the second limiting member is a card slot opened at the side end of the movable cover plate. After assembly, when the pressing plate is not operated, the slot is inserted in the card slot, and the slot limits the card slot so that the movable cover plate is blocked on the outside of the paste outlet, and the paste outlet can be stably and effectively closed. In order to facilitate the display of the structure, the curvature of the paste outlet and the movable cover plate is not reflected in the figure, but in fact, the longitudinal cross-sectional profile of the paste outlet is an arc, and the longitudinal cross-sectional profile of the movable cover plate is also an arc. The rotation of the pressing plate causes the movable cover plate to rotate accordingly, and the rotation trajectory of the movable cover plate coincides with the arc of the paste outlet, so that the movable cover plate can slide against the outer wall of the discharge nozzle where the paste outlet is opened, and close the paste outlet.

[0046] Embodiment 15, this embodiment differs from Embodiment 1 only in that, Figure 8As shown, the first limiting member is a T-slot opened on the discharge nozzles on the left and right sides of the paste outlet, and the second limiting member is a T-slide formed by extending downward from the left and right edges of the bottom of the movable cover plate. After assembly and without operation, the T-slide is inserted into the T-slot, and the T-slot limits the T-slide, so that the movable cover plate is buckled and fits on the paste outlet, and the paste outlet can be stably and effectively closed. In order to facilitate the display of the structure, the curvature of the paste outlet and the movable cover plate is not reflected in the figure, but in fact, the longitudinal cross-sectional profile of the paste outlet is an arc, and the longitudinal cross-sectional profile of the movable cover plate is also an arc. The rotation of the pressing plate causes the movable cover plate to rotate accordingly, and the rotation trajectory of the movable cover plate coincides with the arc of the paste outlet, so that the movable cover plate can slide against the outer wall of the discharge nozzle where the paste outlet is opened, and close the paste outlet.

[0047] Example 16. The only difference between this example and Example 1 is that the pressing plate and the movable cover plate are plastic parts with a certain flexibility, so that the second limiting member on the movable cover plate is not prone to interference with the first limiting member on the discharge nozzle during the cooperation process, and the second limiting member can smoothly cooperate with the first limiting member to complete the closure of the paste outlet.

[0048] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, or different implementation methods can be combined, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A paste extruder, comprising a paste tube for containing the paste, a discharge nozzle is provided at the upper end of the paste tube, and a paste outlet is provided on the discharge nozzle, characterized in that: A movable cover plate is provided on the paste tube outside the discharge nozzle, a first limit piece is provided on the movable cover plate, and a second limit piece is provided on the discharge nozzle. The movable cover plate is connected to the discharge nozzle through the cooperation between the first limit piece and the second limit piece to close the discharge nozzle.

2. A paste extruder according to claim 1, characterized in that: The first limiting member is a slide groove opened on the side wall of the material outlet on the left and right sides of the paste outlet, and the slide groove is located below the paste outlet. The second limiting member is an L-shaped latch card formed by folding the left and right sides of the movable cover plate downward and inward.

3. A paste extruder according to claim 1, characterized in that: The first limiting member is a C-shaped slide groove formed by extending the side walls of the discharge nozzle on the left and right sides of the paste outlet outward and then folding upward, and the C-shaped slide groove is located below the paste outlet; the second limiting member is an L-shaped sliding card formed by folding the left and right sides of the movable cover plate downward.

4. A paste extruder according to claim 1, characterized in that: The first limiting member is a slide slot card formed by extending outward from the side walls of the discharge nozzle on the left and right sides of the paste outlet, and the slide slot card is located below the paste outlet; the second limiting member is an outwardly protruding movable slide slot formed by extending downward from the left and right sides of the movable cover plate and then folding, and the cross-section of the movable slide slot is C-shaped, and the opening of the movable slide slot faces below the movable cover plate.

5. A paste extruder according to claim 1, characterized in that: The first limiting member is a slide slot clamp formed by extending outwardly from the side walls of the discharge nozzle on the left and right sides of the paste outlet, and the slide slot clamp is flush with the paste outlet; the second limiting member is an L-shaped support plate formed by folding the left and right sides of the movable cover plate downward and inward.

6. A paste extruder according to claim 1, characterized in that: The first limiting member is a groove formed by the material discharge nozzles on the left and right sides of the paste discharge port extending upward and folding inward, and the second limiting member is a card slot opened at the side end of the movable cover plate.

7. A paste extruder according to claim 1, characterized in that: The first limiting member is a T-shaped groove formed on the discharge nozzles on the left and right sides of the paste discharge port, and the second limiting member is a T-shaped slide formed by extending downward from the left and right edges of the bottom of the movable cover plate.

8. A paste extruder according to claim 1, characterized in that: The cross-sectional profile of the discharge nozzle is one of a circle, an ellipse, a triangle, a rectangle or a regular polygon.

9. A paste extruder according to claim 1, characterized in that: The paste outlet is one of circular, elliptical, triangular, square or polygonal.

10. A paste extruder according to claim 1, characterized in that: The discharge nozzle is located at the top edge of the paste tube and is formed by extending the side wall and the top wall of the paste tube upward.

11. A paste extruder according to claim 1, characterized in that: The discharge nozzle is provided with an inclined discharge wall, the paste discharge port is opened on the discharge wall, the discharge wall is located between the top wall and the side wall of the discharge nozzle, or the discharge wall is the top wall of the discharge nozzle.

12. A paste extruder according to claim 1, characterized in that: The paste outlet is arranged on the top wall or the side wall of the discharge nozzle.

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