Pressing pump head assembling device and method for assembling pressing pump head

Abstract

A pressing pump head assembling device comprises an explorator and a base, and the explorator is fixedly connected with the base. The pressing pump head assembling device further comprises a floating tray, the floating tray is provided with a tray inner hole, and a supporting structure is formed in the floating tray and used for supporting a tooth socket of the pressing pump head. And the reset spring is supported between the floating tray and the base. Wherein the explorator comprises an upper part and a lower part, the outer diameter of the lower part is smaller than the inner diameter of the inner hole of the tray, so that the lower part of the explorator can extend to penetrate through the inner hole of the tray and is fixedly connected to the base, and the outer diameter of the upper part of the explorator is larger than the inner diameter of the inner hole of the tray, so that the explorator abuts against the floating tray; and the reset spring is sleeved on the outer side of the lower part of the explorator. The invention further relates to a method for assembling the pressing pump head through the pressing pump head assembling device. By means of the pressing pump head assembling device and the method for assembling the pressing pump head through the pressing pump head assembling device, an explorator does not need to be replaced midway, and therefore the assembling process of the pressing pump head is simplified.

Description

Technical Field

[0001] The present application relates to the field of product packaging, and in particular to an assembling device for assembling a head of a press pump installed on a container, and also to a method for assembling the head of a press pump. Background Art

[0002] Pressing pumps are widely used in product packaging in the fields of daily chemicals, food, and medicine. They are installed on the mouth of a container containing liquid or semi-liquid products to dispense products for use. Pressing pumps usually include a pressing pump head and a cylinder, wherein the pressing pump head has a pressure head, a spring, a tooth sleeve, a cylinder plug, a piston head, a piston rod, and other components.

[0003] In the process of manufacturing the push pump, the push pump head is usually assembled first, and then the assembled push pump head is connected to the cylinder to complete the assembly of the push pump. It can be seen that the main process in the assembly and manufacturing process of the push pump is the assembly of the push pump head. Since the push pump head has many components, the current traditional assembly process of the push pump head is also relatively complicated. Generally speaking, when assembling the push pump head, the braces and the cylinder plug are first pressed together. This process is completed using the first type of mold. Next, the piston and the piston head are pressed together using the second mold. Finally, the third mold is needed to complete the final assembly of the push pump head.

[0004] Therefore, in the conventional assembly process of the pump head, at least three kinds of dies are required, and each dies has its corresponding base. Therefore, the assembly of the pump head is not only complicated and inefficient, but also costly.

[0005] In addition, in order to match the different sizes of bottle mouths, the braces on the head of the pump are also designed to have a variety of sizes. For example, the commonly used braces sizes include 24mm diameter and 28mm diameter. Corresponding to the braces of different sizes, the traditional assembly method is to assemble them according to different templates. During the assembly process, the template of the corresponding size needs to be selected according to the size of the braces used. The increase in the number of templates not only increases the cost, but also requires a considerable space to store these templates.

[0006] Therefore, in the art, there is a need for a newly designed compression pump head assembly device and a corresponding new compression pump head assembly method to overcome the problems existing in the above-mentioned prior art. Summary of the invention

[0007] The present application is made to solve the problems of the prior art mentioned above. The purpose of the present application is to provide a novel assembly device for a compression pump head, which allows only one master mold to be used during the entire assembly process of the compression pump head, without the need to replace the master mold in the middle of assembling the compression pump head. Furthermore, the assembly device provided by the present application can also be applied to braces of different sizes.

[0008] The present application provides a pressing pump head assembly device, which includes a backing mold and a base, and the backing mold is fixedly connected to the base. In addition, the pressing pump head assembly device also includes: a floating tray, the floating tray has an inner hole of the tray, and a supporting structure is formed in the floating tray for supporting the braces of the pressing pump head; and a reset spring, which is supported between the floating tray and the base. Among them, the backing mold includes an upper part and a lower part, and the outer diameter of the lower part is smaller than the inner diameter of the inner hole of the tray, so that the lower part of the backing mold can extend through the inner hole of the tray and be fixedly connected to the base, and the outer diameter of the upper part of the backing mold is larger than the inner diameter of the inner hole of the tray, so that it rests on the floating tray; the reset spring is sleeved on the outer side of the lower part of the backing mold.

[0009] The pressing pump head assembly device has a simple structure and is suitable for the entire process of assembling the pressing pump head. There is no need to replace the master mold in the middle, thereby simplifying the assembly process of the pressing pump head.

[0010] In a specific structure, a lower sleeve of the paving is formed at the lower part of the paving, and a base inner hole is formed in the base. The lower sleeve of the paving can be matched in the base inner hole to achieve a fixed connection between the paving and the base.

[0011] Preferably, a transverse plate is formed in the lower sleeve of the profiling mold. The position of the transverse plate corresponds to the molding gate position of the profiling mold during molding, so that it can simplify the molding process of the profiling mold.

[0012] Preferably, the floating tray includes an outer tray ring and an inner tray ring, and a support structure is formed between the outer tray ring and the inner tray ring, and the support structure includes at least a first support portion and a second support portion, the first support portion is adjacent to the inner tray ring, and is used to support a brace of a first size, and the second support portion is adjacent to the outer tray ring, and is used to support a brace of a second size, and the first size is smaller than the second size. The floating tray configured in this way can be applied to braces of different sizes, so there is no need to replace the master mold due to different sizes of braces, thereby helping to further simplify the assembly of the press pump head.

[0013] Preferably, a master mold upper ring is formed on the upper part of the master mold, and the master mold upper ring is configured to support the cylinder plug pressing the pump head during assembly, for example, the master mold upper ring can support the flange of the cylinder plug.

[0014] Furthermore, a master mold inner ring is provided inside the lower part of the master mold, and the master mold inner ring is configured to support the piston of the head of the pressing pump during assembly. Specifically, the piston in the pressing pump usually includes a piston outer ring and a piston inner ring, and between the piston outer ring and the piston inner ring is a connecting web connecting them together, and during assembly, the connecting web is supported on the master mold inner ring. In this way, the positioning of the piston in the master mold is achieved.

[0015] Preferably, the upper mold ring is formed coaxially with the inner mold ring. In this way, the cylinder plug, the piston head and the piston can be positioned coaxially during assembly.

[0016] In addition, preferably, the upper circle of the mold is coaxially arranged with the supporting structure of the floating tray, so as to ensure that the sleeve is coaxially positioned with the cylinder plug, the piston head and the piston.

[0017] The invention also relates to a method for assembling a compression pump head, wherein the compression pump head comprises a compression head, a toothed sleeve, a cylinder plug, a piston, a piston head and an elastic reset mechanism. The method for assembling the compression pump head uses the compression pump head assembly device as described above, and comprises the following steps:

[0018] a) placing the piston into the master mold so that the piston is supported on the master mold inner ring of the master mold, and the master mold inner ring is formed inside the lower part of the master mold;

[0019] b) Place the piston head into the master mold and allow the lower end of the piston head to fall into the piston;

[0020] c) placing the cylinder plug into the master form and supporting the cylinder plug on the top of the master form;

[0021] d) Place the braces on the supporting structure of the floating tray;

[0022] e) applying a downward pressing force on the top of the mouthpiece to move the mouthpiece downward relative to the cylinder plug to achieve connection between the mouthpiece and the cylinder plug, wherein the downward movement of the mouthpiece causes the floating tray to move downward together and compresses the return spring to reduce the height of the floating tray from the first height to the second height from the base;

[0023] f) The pressing force applied to the toothed brace is removed, and the floating tray moves upward under the action of the resilience of the return spring, driving the toothed brace and the cylinder plug to move upward together, and the height of the floating tray from the base is restored to the first height;

[0024] g) Place the elastic reset mechanism so that one end of it is supported on the tooth sleeve or cylinder plug;

[0025] h) placing the pressure head so that the pressure head inner sleeve of the pressure head passes through the elastic reset mechanism, and the pressure head outer sleeve of the pressure head and the upper ring of the tooth sleeve of the tooth sleeve are mutually sleeved;

[0026] i) Apply downward pressing force on the top of the ram so that the ram inner sleeve of the ram is connected with the piston head, and the piston head is assembled with the piston.

[0027] Preferably, during step i, under the action of the elastic reset mechanism, the braces and the cylinder plug also move downward together, and drive the floating tray to move downward until the cylinder plug is supported on the top of the mold.

[0028] Preferably, in step e and step i, a pressing device is used to apply the pressing force. The pressing device is, for example, a pneumatic press. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings show non-limiting preferred implementation structures of the present invention, and the features and advantages of the present invention can be more clearly seen in conjunction with the accompanying drawings.

[0030] Figure 1 A cross-sectional view of a compression pump is shown.

[0031] Figure 2 Shows Figure 1 Exploded cross-sectional view of a compression pump head of a compression pump of FIG.

[0032] Figure 3 A cross-sectional view of the assembled compression pump head is shown.

[0033] Figure 4 A front view of a mouthpiece having a first size, such as a 24 mm diameter, is shown.

[0034] Figure 5 A front view of a mouthpiece having a second size, such as a 28 mm diameter, is shown.

[0035] Figure 6 A cross-sectional view of a pump head assembly device for assembling a pump head according to the present application is shown, wherein the pump head assembly device is in an assembled state.

[0036] Figure 7 Shows Figure 6 An exploded sectional view of the compression pump head assembly device.

[0037] Figures 8a to 8i The steps of a method for assembling a pump head using the pump head assembling device of the present application are shown.

[0038] (Explanation of symbols)

[0039] 1 Press the pump

[0040] 2 Press the pump head

[0041] 3 cylinders

[0042] 10 pressure head

[0043] 11 Inner sleeve of pressure head

[0044] 12 Pressure head outer sleeve

[0045] 20 braces

[0046] 21 braces upper ring

[0047] 30 cylinder plug

[0048] 31 Flange

[0049] 40 piston

[0050] 41 Piston outer ring

[0051] 42 piston inner ring

[0052] 43 Connecting web

[0053] 50 piston head

[0054] 60 elastic reset mechanism

[0055] 100-push pump head assembly

[0056] 110 Proofing

[0057] 111 follow the mold circle

[0058] 112 mold inner ring

[0059] 113 lower sleeve

[0060] 114 horizontal board

[0061] 120 floating pallet

[0062] 121 tray outer ring

[0063] 122 tray inner ring

[0064] 123 First support

[0065] 124 Second support

[0066] 125 tray inner hole

[0067] 130 base

[0068] 131 base inner hole

[0069] 140 return spring

[0070] 200 Pressing device DETAILED DESCRIPTION

[0071] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the drawings only show preferred embodiments of the present invention, which do not constitute a limitation on the scope of the present invention. Those skilled in the art can make various obvious modifications, variations, and equivalent substitutions to the present invention based on the embodiments shown in the drawings, and the technical features of the different embodiments described below can be arbitrarily combined with each other without contradiction, which all fall within the scope of protection of the present invention.

[0072] <Press Pump Head>

[0073] Figure 1 A cross-sectional view of a compression pump 1 is shown, wherein the compression pump 1 comprises a compression pump head 2 and a cylinder 3 connected to the compression pump head 2 .

[0074] Figure 2 Shows Figure 1 An exploded cross-sectional view of a pump head 2 of a pump 1, Figure 3 2 shows a cross-sectional view of the assembled pressing pump head 2. The pressing pump head 2 comprises a pressing head 10, a toothed sleeve 20, a cylinder plug 30, a piston 40, a piston head 50 and an elastic reset mechanism 60. The specific structure of each component and the interconnection method are as follows.

[0075] The toothed sleeve 20 and the cylinder plug 30 are connected together, for example, by snapping together. A flange 31 is formed on the upper outer surface of the cylinder plug 30. When the cylinder plug 30 and the toothed sleeve 20 are connected together, the flange 31 can play a role in limiting the relative position between the cylinder plug 30 and the toothed sleeve 20.

[0076] The dental braces 20 can have various sizes, for example Figure 4 The size of the braces shown in the figure is smaller, for example, the maximum diameter may be 24 mm. Figure 5 The size of the braces shown in FIG. 5 is relatively large, for example, the maximum diameter may be 28 mm.

[0077] The ram 10 includes a ram inner sleeve 11 and a ram outer sleeve 12 located outside the ram inner sleeve 11 . The lower end of the ram inner sleeve 11 is connected to the piston head 50 . For example, the piston head 50 can be sleeved on the lower end of the ram inner sleeve 11 .

[0078] The piston 40 includes a piston outer ring 41, a piston inner ring 42 and a connecting web 43 connected between the piston outer ring 41 and the piston inner ring 42. The piston 40 is sleeved on the outer side of the piston head 50, specifically, the piston inner ring 42 of the piston 40 is sleeved on the outer side of the piston head 50.

[0079] The upper part of the toothed sleeve 20 is formed with a toothed sleeve upper ring 21. In the installed state, the pressure head outer sleeve 12 of the pressure head 10 is matched with the toothed sleeve upper ring 21 of the toothed sleeve 20. For example, as shown in the figure, the pressure head outer sleeve 12 is sleeved on the outer side of the toothed sleeve upper ring 21. Of course, in the compression pump head 2 of certain structures, the toothed sleeve upper ring 21 of the toothed sleeve 20 can also be sleeved on the outer side of the pressure head outer sleeve 12 of the pressure head 10.

[0080] The pressing pump head 2 further comprises an elastic reset mechanism 60 , which may be, for example, a plastic spring or a metal spring. The exemplary structure shown in the figure uses a plastic spring with an elastic strip.

[0081] One end of the elastic reset mechanism 60 (the lower end in the structure shown in the figure) is supported on the mouthpiece 20 or the cylinder plug 30, and the other end (the upper end in the figure) is supported on the pressure head 10. As the pressure head 10 reciprocates in the up and down directions relative to the mouthpiece 20, the elastic reset mechanism 60 will be compressed or relaxed.

[0082] <Pump Head Assembly Device>

[0083] Figure 6 FIG. 4 shows a cross-sectional view of a pump head assembly device 100 for assembling a pump head 2 according to the present application, wherein the pump head assembly device 100 is in an assembled state. Figure 7 Another cross-sectional view of the pump head assembly device 100 is shown, wherein the components of the pump head assembly device 100 are decomposed to more clearly show its structure.

[0084] The pump head assembly device 100 includes a mold 110, a floating tray 120, a base 130 and a return spring 140. The upper portion of the mold 110 is formed with a mold upper ring 111, and the inner side of the lower portion thereof is formed with a mold inner ring 112. Preferably, the mold upper ring 111 and the mold inner ring 112 are coaxially formed.

[0085] A lower sleeve 113 is further formed below the inner circle 112 of the master mold. Preferably, a transverse plate 114 is also formed inside the lower sleeve 113 of the master mold, and the position of the transverse plate 114 corresponds to the molding gate of the casting mold of the master mold 110. In other words, the transverse plate 114 is a structure formed at the gate during the molding of the master mold 110, so the transverse plate 114 is a structure formed to mold the master mold 110 more conveniently.

[0086] The floating tray 120 includes an outer tray ring 121 located outside and an inner tray ring 122 located inside, and a support structure is formed between the outer tray ring 121 and the inner tray ring 122. During the assembly of the compression pump head 2, the toothed sleeve 20 of the compression pump head 2 can be supported on the support structure.

[0087] Preferably, the supporting structure may have a larger width so as to be applicable to braces 20 of different sizes. Figure 5 The 28 mm brace shown in FIG. 1 is close to the outer ring 121 of the tray when it rests on the support structure, while the smaller size brace 20 (e.g. Figure 4 The 24 mm braces shown in FIG. 1 ) are close to the inner ring 122 of the tray when resting on the support structure.

[0088] In the preferred structure shown in the figure, the supporting structure is formed in a stepped shape, so that the supporting structure includes a first supporting portion 123 and a second supporting portion 124, which are respectively suitable for braces 20 of a first size (e.g., 24 mm) and braces of a second size (e.g., 28 mm).

[0089] In addition to the two-step ladder shown in the figure, the supporting structure between the tray outer ring 121 and the tray inner ring 122 can also form a three-step ladder structure or more, so as to accommodate braces 20 of more sizes and types.

[0090] A tray inner hole 125 is formed inside the tray inner ring 122 of the floating tray 120, and the outer diameter of the lower portion of the support mold 110 including the support mold lower sleeve 113 is smaller than the inner diameter of the tray inner hole 125, so that the support mold 110 can pass through the tray inner hole 125. Further, at least the outer diameter of the support mold upper ring 111 of the support mold 110 is larger than the inner diameter of the tray inner hole 125, so that the support mold upper ring 111 of the support mold 110 can be abutted against the tray inner ring 122 of the floating tray 120.

[0091] A base inner hole 131 is formed in the base 130 . After passing through the tray inner hole 125 of the floating tray 120 , the lower sleeve 113 of the supporting mold of the floating tray 120 fits into the base inner hole 131 , so that the supporting mold 110 is fixedly connected to the base 130 .

[0092] The return spring 140 is sleeved on the outer side of the supporting mold 110 and supported between the floating tray 120 and the base 130 .

[0093] Preferably, in the assembled state, the upper circle 111 of the supporting mold 110 is coaxially arranged with the supporting structure of the floating tray 120 .

[0094] <Assembly process of the pump head>

[0095] Figures 8a to 8i The steps of assembling the pump head 2 using the pump head assembling device 100 of the present application are shown.

[0096] First, if Figure 8aAs shown, the piston 40 is placed in the master mold 110 of the pump head assembly device 100, and the piston 40 is against the master mold inner ring 112. Specifically, the connecting web 43 of the piston 40 is supported on the top of the master mold inner ring 112.

[0097] Then, if Figure 8b As shown, the piston head 50 is placed into the master mold 110 so that the lower end of the piston head 50 falls into the piston inner ring 42 of the piston 40 .

[0098] Then, if Figure 8c As shown, the cylinder plug 30 is placed in the master mold 110 so that the flange 31 of the cylinder plug 30 is supported on the upper end surface of the master mold upper ring 111 of the master mold 110.

[0099] After the cylinder plug 30 is placed, the dental brace 20 is placed on the floating tray 120, wherein the lower end of the dental brace 20 is supported on the supporting structure of the floating tray 120. Figure 8d In the example shown, the mouthpiece 20 is a mouthpiece with a larger size, which is supported on the second supporting portion 124 and positioned close to the outer ring 121 of the floating tray 120. Of course, as mentioned above, when the mouthpiece 20 is a mouthpiece with a smaller size, it is supported on the first supporting portion 123 and positioned close to the inner ring 122 of the floating tray 120.

[0100] As described above, the upper circle 111 and the inner circle 112 of the mold 110 are formed coaxially, and the mold 110 and the floating tray 120 are arranged to be coaxial after assembly, so after placement, the coaxial positioning of the braces 20, the cylinder plug 30, the piston 40 and the piston head 50 can be achieved.

[0101] Then, a downward pressing force is applied to the top of the mouthpiece 20, so that the mouthpiece 20 moves downward relative to the cylinder plug 30, and the engagement connection between the mouthpiece 20 and the cylinder plug 30 is completed. In this process, the floating tray 120 also moves downward under the pressure of the mouthpiece 20, so that the return spring 140 is compressed, and the height of the floating tray 120 from the base 130 is increased by Figures 8a to 8d The first height H1 in is reduced to Figure 8e The second height H2 is shown in FIG.

[0102] The pressing process can be completed using a pressing device 200, such as a pneumatic press. Those skilled in the art will appreciate that the pressing device 200 can also be other types of devices, as long as it can apply downward pressure from the top of the mouthpiece 20. Further, the pressing device 200 is also optional, and the mouthpiece 20 can be pressed manually by an operator, which is also within the scope of the present application.

[0103] After the mouthpiece 20 is pressed downward to connect the mouthpiece 20 to the cylinder plug 30, the pressure applied to the mouthpiece 20 is removed. Figure 8f As shown, the resilience of the return spring 140 causes the floating tray 120 to move upward, thereby driving the mouthpiece 20 and the cylinder plug 30 connected thereto to move upward together. The height of the floating tray 120 from the base 130 is restored from the second height H2 to the first height H1.

[0104] Next, the elastic reset mechanism 60 is placed so that one end (e.g., the lower end) is supported on the dental cap 20 or the cylinder plug 30, for example, Figure 8g 2 and 3 , it is exemplarily shown that the lower end of the elastic return mechanism 60 is supported on the cylinder plug 30 .

[0105] After the elastic reset mechanism 60 is placed, the pressure head 10 is placed, as shown in FIG. Figure 8h As shown, specifically, the ram inner sleeve 11 of the ram 10 passes through the elastic reset mechanism 60 and is partially inserted into the piston head 50, the other end of the elastic reset mechanism 60 (for example, the upper end shown in the figure) is supported on the ram 10, and the ram outer sleeve 12 of the ram 10 and the brace upper ring 21 of the brace 20 are mounted on each other.

[0106] Finally, a downward pressing force is applied to the top of the pressure head 10. In this process, under the action of the elastic reset mechanism 60, the cylinder plug 30 drives the mouthpiece 20 to move downward together until the flange 31 of the cylinder plug 30 abuts against the upper circle 111 of the support mold 110. At this time, the height of the floating tray 120 from the base 130 drops from the first height H1 to the second height H2, as shown in FIG. Figure 8i After the flange 31 of the cylinder plug 30 abuts against the upper circle 111 of the mold 110, the ram 10 is pressed downward to assemble the lower end of the ram inner sleeve 11 of the ram 10 with the piston head 50, and the piston 40 and the piston head 50 are also assembled together.

[0107] At this point, the pressing pump head 2 of the pressing pump 1 is assembled. After this, the pressing pump 1 can be assembled by simply connecting the cylinder 3 to the cylinder plug 30.

[0108] From the assembly process of the push pump head 2 described above, it can be seen that only one push pump head assembly device 100 is needed to complete the assembly of the push pump head 2, without changing the mold in the middle. The push pump head assembly device 100 has a simple structure and allows for simple design. For example, the structure of the floating tray 120 therein can be designed to be suitable for braces of different sizes.

[0109] The structure of the pump head assembly device 100 of the present application and the steps of using the pump head assembly device 100 to assemble the pump head 2 are described in detail above. Those skilled in the art will appreciate that various obvious modifications, variations, and recombinations can be made based on the above disclosure, and these are also within the scope of the present application.

Claims

1. A pump head assembly device, comprising a template and a base, wherein the template is fixedly connected to the base, characterized in that: The pressing pump head assembly device also includes: A floating tray, wherein the floating tray has a tray inner hole and a supporting structure is formed in the floating tray for supporting a toothed brace of a pressing pump head; and a return spring, the return spring being supported between the floating tray and the base; The former comprises an upper part and a lower part, the outer diameter of the lower part is smaller than the inner diameter of the inner hole of the tray, so that the lower part of the former can extend through the inner hole of the tray and be fixedly connected to the base, and the outer diameter of the upper part of the former is larger than the inner diameter of the inner hole of the tray, so that it abuts against the floating tray; The return spring is sleeved on the outer side of the lower part of the supporting mold.

2. The pump head assembly device according to claim 1, characterized in that: A lower sleeve of the paving is formed at the lower part of the paving, and a base inner hole is formed in the base. The lower sleeve of the paving can be matched in the base inner hole to realize the fixed connection between the paving and the base.

3. The pump head assembly device according to claim 2, characterized in that: A transverse plate is formed in the lower sleeve of the profiling mold.

4. The pump head assembly device according to claim 1, wherein: The floating pallet includes a pallet outer ring and a pallet inner ring, and the supporting structure is formed between the pallet outer ring and the pallet inner ring. The supporting structure includes at least a first supporting portion and a second supporting portion. The first supporting portion is adjacent to the pallet inner ring and is used to support braces with a first size. The second supporting portion is adjacent to the pallet outer ring and is used to support braces with a second size. The first size is smaller than the second size.

5. The pump head assembly device according to claim 1, wherein: The upper portion of the master mold is formed with a master mold upper ring, and the master mold upper ring is configured to support the cylinder plug pressing the pump head during assembly.

6. The pump head assembly device according to claim 5, characterized in that: A master mold inner ring is arranged inside the lower part of the master mold, and the master mold inner ring is arranged to support the piston pressing the pump head during assembly.

7. The pump head assembly device according to claim 6, wherein: The upper mold circle is coaxially formed with the inner mold circle; and / or The upper circle of the supporting mold is coaxially arranged with the supporting structure.

8. A method for assembling a compression pump head, the compression pump head comprising a compression head, a toothed sleeve, a cylinder plug, a piston, a piston head and an elastic reset mechanism, characterized in that: The method for assembling a pump head uses the pump head assembly device according to claim 1 and comprises the following steps: a) placing the piston into the master mold so that the piston is supported on a master mold inner ring of the master mold, wherein the master mold inner ring is formed inside the lower part of the master mold; b) placing the piston head into the master mold and allowing the lower end of the piston head to fall into the piston; c) placing the cylinder plug into the master form and supporting the cylinder plug on the top of the master form; d) placing the dental brace on the supporting structure of the floating tray; e) applying a downward pressing force on the top of the mouthpiece to move the mouthpiece downward relative to the cylinder plug to achieve connection between the mouthpiece and the cylinder plug, wherein the downward movement of the mouthpiece causes the floating tray to move downward together and compresses the return spring to reduce the height of the floating tray from the first height to the second height from the base; f) removing the pressing force applied to the mouthpiece, the floating tray moves upward under the action of the resilience of the return spring, and drives the mouthpiece and the cylinder plug to move upward together, and the height of the floating tray from the base is restored to the first height; g) placing the elastic reset mechanism so that one end thereof is supported on the tooth sleeve or the cylinder plug; h) placing the pressing head so that the pressing head inner sleeve of the pressing head passes through the elastic reset mechanism, and the pressing head outer sleeve of the pressing head and the upper ring of the toothed brace are mutually sleeved; i) applying downward pressing force on the top of the ram so that the ram inner sleeve of the ram is connected with the piston head, and the piston head is assembled with the piston.

9. The method for assembling a pump head according to claim 8, characterized in that: During step i, under the action of the elastic reset mechanism, the braces and the cylinder plug also move downward together, and drive the floating tray to move downward until the cylinder plug is supported on the top of the mold.

10. The method for assembling a pump head according to claim 8 or 9, characterized in that: In step e and step i, a pressing device is used to apply the pressing force.

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